|
1 /******************************************************************************* |
|
2 |
|
3 Intel PRO/1000 Linux driver |
|
4 Copyright(c) 1999 - 2006 Intel Corporation. |
|
5 |
|
6 This program is free software; you can redistribute it and/or modify it |
|
7 under the terms and conditions of the GNU General Public License, |
|
8 version 2, as published by the Free Software Foundation. |
|
9 |
|
10 This program is distributed in the hope it will be useful, but WITHOUT |
|
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
|
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
|
13 more details. |
|
14 |
|
15 You should have received a copy of the GNU General Public License along with |
|
16 this program; if not, write to the Free Software Foundation, Inc., |
|
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. |
|
18 |
|
19 The full GNU General Public License is included in this distribution in |
|
20 the file called "COPYING". |
|
21 |
|
22 Contact Information: |
|
23 Linux NICS <linux.nics@intel.com> |
|
24 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net> |
|
25 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
|
26 |
|
27 vim: noexpandtab |
|
28 |
|
29 *******************************************************************************/ |
|
30 |
|
31 #include "e1000-3.4-ethercat.h" |
|
32 #include <net/ip6_checksum.h> |
|
33 #include <linux/io.h> |
|
34 #include <linux/prefetch.h> |
|
35 #include <linux/bitops.h> |
|
36 #include <linux/if_vlan.h> |
|
37 |
|
38 char e1000_driver_name[] = "ec_e1000"; |
|
39 static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver"; |
|
40 #define DRV_VERSION "7.3.21-k8-NAPI" |
|
41 const char e1000_driver_version[] = DRV_VERSION; |
|
42 static const char e1000_copyright[] = "Copyright (c) 1999-2006 Intel Corporation."; |
|
43 |
|
44 /* e1000_pci_tbl - PCI Device ID Table |
|
45 * |
|
46 * Last entry must be all 0s |
|
47 * |
|
48 * Macro expands to... |
|
49 * {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)} |
|
50 */ |
|
51 static DEFINE_PCI_DEVICE_TABLE(e1000_pci_tbl) = { |
|
52 INTEL_E1000_ETHERNET_DEVICE(0x1000), |
|
53 INTEL_E1000_ETHERNET_DEVICE(0x1001), |
|
54 INTEL_E1000_ETHERNET_DEVICE(0x1004), |
|
55 INTEL_E1000_ETHERNET_DEVICE(0x1008), |
|
56 INTEL_E1000_ETHERNET_DEVICE(0x1009), |
|
57 INTEL_E1000_ETHERNET_DEVICE(0x100C), |
|
58 INTEL_E1000_ETHERNET_DEVICE(0x100D), |
|
59 INTEL_E1000_ETHERNET_DEVICE(0x100E), |
|
60 INTEL_E1000_ETHERNET_DEVICE(0x100F), |
|
61 INTEL_E1000_ETHERNET_DEVICE(0x1010), |
|
62 INTEL_E1000_ETHERNET_DEVICE(0x1011), |
|
63 INTEL_E1000_ETHERNET_DEVICE(0x1012), |
|
64 INTEL_E1000_ETHERNET_DEVICE(0x1013), |
|
65 INTEL_E1000_ETHERNET_DEVICE(0x1014), |
|
66 INTEL_E1000_ETHERNET_DEVICE(0x1015), |
|
67 INTEL_E1000_ETHERNET_DEVICE(0x1016), |
|
68 INTEL_E1000_ETHERNET_DEVICE(0x1017), |
|
69 INTEL_E1000_ETHERNET_DEVICE(0x1018), |
|
70 INTEL_E1000_ETHERNET_DEVICE(0x1019), |
|
71 INTEL_E1000_ETHERNET_DEVICE(0x101A), |
|
72 INTEL_E1000_ETHERNET_DEVICE(0x101D), |
|
73 INTEL_E1000_ETHERNET_DEVICE(0x101E), |
|
74 INTEL_E1000_ETHERNET_DEVICE(0x1026), |
|
75 INTEL_E1000_ETHERNET_DEVICE(0x1027), |
|
76 INTEL_E1000_ETHERNET_DEVICE(0x1028), |
|
77 INTEL_E1000_ETHERNET_DEVICE(0x1075), |
|
78 INTEL_E1000_ETHERNET_DEVICE(0x1076), |
|
79 INTEL_E1000_ETHERNET_DEVICE(0x1077), |
|
80 INTEL_E1000_ETHERNET_DEVICE(0x1078), |
|
81 INTEL_E1000_ETHERNET_DEVICE(0x1079), |
|
82 INTEL_E1000_ETHERNET_DEVICE(0x107A), |
|
83 INTEL_E1000_ETHERNET_DEVICE(0x107B), |
|
84 INTEL_E1000_ETHERNET_DEVICE(0x107C), |
|
85 INTEL_E1000_ETHERNET_DEVICE(0x108A), |
|
86 INTEL_E1000_ETHERNET_DEVICE(0x1099), |
|
87 INTEL_E1000_ETHERNET_DEVICE(0x10B5), |
|
88 INTEL_E1000_ETHERNET_DEVICE(0x2E6E), |
|
89 /* required last entry */ |
|
90 {0,} |
|
91 }; |
|
92 |
|
93 // do not auto-load driver |
|
94 // MODULE_DEVICE_TABLE(pci, e1000_pci_tbl); |
|
95 |
|
96 int e1000_up(struct e1000_adapter *adapter); |
|
97 void e1000_down(struct e1000_adapter *adapter); |
|
98 void e1000_reinit_locked(struct e1000_adapter *adapter); |
|
99 void e1000_reset(struct e1000_adapter *adapter); |
|
100 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter); |
|
101 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter); |
|
102 void e1000_free_all_tx_resources(struct e1000_adapter *adapter); |
|
103 void e1000_free_all_rx_resources(struct e1000_adapter *adapter); |
|
104 static int e1000_setup_tx_resources(struct e1000_adapter *adapter, |
|
105 struct e1000_tx_ring *txdr); |
|
106 static int e1000_setup_rx_resources(struct e1000_adapter *adapter, |
|
107 struct e1000_rx_ring *rxdr); |
|
108 static void e1000_free_tx_resources(struct e1000_adapter *adapter, |
|
109 struct e1000_tx_ring *tx_ring); |
|
110 static void e1000_free_rx_resources(struct e1000_adapter *adapter, |
|
111 struct e1000_rx_ring *rx_ring); |
|
112 void e1000_update_stats(struct e1000_adapter *adapter); |
|
113 |
|
114 static int e1000_init_module(void); |
|
115 static void e1000_exit_module(void); |
|
116 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent); |
|
117 static void __devexit e1000_remove(struct pci_dev *pdev); |
|
118 static int e1000_alloc_queues(struct e1000_adapter *adapter); |
|
119 static int e1000_sw_init(struct e1000_adapter *adapter); |
|
120 static int e1000_open(struct net_device *netdev); |
|
121 static int e1000_close(struct net_device *netdev); |
|
122 static void e1000_configure_tx(struct e1000_adapter *adapter); |
|
123 static void e1000_configure_rx(struct e1000_adapter *adapter); |
|
124 static void e1000_setup_rctl(struct e1000_adapter *adapter); |
|
125 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter); |
|
126 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter); |
|
127 static void e1000_clean_tx_ring(struct e1000_adapter *adapter, |
|
128 struct e1000_tx_ring *tx_ring); |
|
129 static void e1000_clean_rx_ring(struct e1000_adapter *adapter, |
|
130 struct e1000_rx_ring *rx_ring); |
|
131 static void e1000_set_rx_mode(struct net_device *netdev); |
|
132 static void e1000_update_phy_info_task(struct work_struct *work); |
|
133 static void e1000_watchdog(struct work_struct *work); |
|
134 static void e1000_82547_tx_fifo_stall_task(struct work_struct *work); |
|
135 static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb, |
|
136 struct net_device *netdev); |
|
137 static struct net_device_stats * e1000_get_stats(struct net_device *netdev); |
|
138 static int e1000_change_mtu(struct net_device *netdev, int new_mtu); |
|
139 static int e1000_set_mac(struct net_device *netdev, void *p); |
|
140 void ec_poll(struct net_device *); |
|
141 static irqreturn_t e1000_intr(int irq, void *data); |
|
142 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter, |
|
143 struct e1000_tx_ring *tx_ring); |
|
144 static int e1000_clean(struct napi_struct *napi, int budget); |
|
145 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter, |
|
146 struct e1000_rx_ring *rx_ring, |
|
147 int *work_done, int work_to_do); |
|
148 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter, |
|
149 struct e1000_rx_ring *rx_ring, |
|
150 int *work_done, int work_to_do); |
|
151 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter, |
|
152 struct e1000_rx_ring *rx_ring, |
|
153 int cleaned_count); |
|
154 static void e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter, |
|
155 struct e1000_rx_ring *rx_ring, |
|
156 int cleaned_count); |
|
157 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd); |
|
158 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, |
|
159 int cmd); |
|
160 static void e1000_enter_82542_rst(struct e1000_adapter *adapter); |
|
161 static void e1000_leave_82542_rst(struct e1000_adapter *adapter); |
|
162 static void e1000_tx_timeout(struct net_device *dev); |
|
163 static void e1000_reset_task(struct work_struct *work); |
|
164 static void e1000_smartspeed(struct e1000_adapter *adapter); |
|
165 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter, |
|
166 struct sk_buff *skb); |
|
167 |
|
168 static bool e1000_vlan_used(struct e1000_adapter *adapter); |
|
169 static void e1000_vlan_mode(struct net_device *netdev, |
|
170 netdev_features_t features); |
|
171 static void e1000_vlan_filter_on_off(struct e1000_adapter *adapter, |
|
172 bool filter_on); |
|
173 static int e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid); |
|
174 static int e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid); |
|
175 static void e1000_restore_vlan(struct e1000_adapter *adapter); |
|
176 |
|
177 #ifdef CONFIG_PM |
|
178 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state); |
|
179 static int e1000_resume(struct pci_dev *pdev); |
|
180 #endif |
|
181 static void e1000_shutdown(struct pci_dev *pdev); |
|
182 |
|
183 #ifdef CONFIG_NET_POLL_CONTROLLER |
|
184 /* for netdump / net console */ |
|
185 static void e1000_netpoll (struct net_device *netdev); |
|
186 #endif |
|
187 |
|
188 #define COPYBREAK_DEFAULT 256 |
|
189 static unsigned int copybreak __read_mostly = COPYBREAK_DEFAULT; |
|
190 module_param(copybreak, uint, 0644); |
|
191 MODULE_PARM_DESC(copybreak, |
|
192 "Maximum size of packet that is copied to a new buffer on receive"); |
|
193 |
|
194 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev, |
|
195 pci_channel_state_t state); |
|
196 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev); |
|
197 static void e1000_io_resume(struct pci_dev *pdev); |
|
198 |
|
199 static struct pci_error_handlers e1000_err_handler = { |
|
200 .error_detected = e1000_io_error_detected, |
|
201 .slot_reset = e1000_io_slot_reset, |
|
202 .resume = e1000_io_resume, |
|
203 }; |
|
204 |
|
205 static struct pci_driver e1000_driver = { |
|
206 .name = e1000_driver_name, |
|
207 .id_table = e1000_pci_tbl, |
|
208 .probe = e1000_probe, |
|
209 .remove = __devexit_p(e1000_remove), |
|
210 #ifdef CONFIG_PM |
|
211 /* Power Management Hooks */ |
|
212 .suspend = e1000_suspend, |
|
213 .resume = e1000_resume, |
|
214 #endif |
|
215 .shutdown = e1000_shutdown, |
|
216 .err_handler = &e1000_err_handler |
|
217 }; |
|
218 |
|
219 MODULE_AUTHOR("Florian Pose <fp@igh-essen.com>"); |
|
220 MODULE_DESCRIPTION("EtherCAT-capable Intel(R) PRO/1000 Network Driver"); |
|
221 MODULE_LICENSE("GPL"); |
|
222 MODULE_VERSION(DRV_VERSION); |
|
223 |
|
224 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK) |
|
225 static int debug = -1; |
|
226 module_param(debug, int, 0); |
|
227 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); |
|
228 |
|
229 /** |
|
230 * e1000_get_hw_dev - return device |
|
231 * used by hardware layer to print debugging information |
|
232 * |
|
233 **/ |
|
234 struct net_device *e1000_get_hw_dev(struct e1000_hw *hw) |
|
235 { |
|
236 struct e1000_adapter *adapter = hw->back; |
|
237 return adapter->netdev; |
|
238 } |
|
239 |
|
240 /** |
|
241 * e1000_init_module - Driver Registration Routine |
|
242 * |
|
243 * e1000_init_module is the first routine called when the driver is |
|
244 * loaded. All it does is register with the PCI subsystem. |
|
245 **/ |
|
246 |
|
247 static int __init e1000_init_module(void) |
|
248 { |
|
249 int ret; |
|
250 pr_info("%s - version %s\n", e1000_driver_string, e1000_driver_version); |
|
251 |
|
252 pr_info("%s\n", e1000_copyright); |
|
253 |
|
254 ret = pci_register_driver(&e1000_driver); |
|
255 if (copybreak != COPYBREAK_DEFAULT) { |
|
256 if (copybreak == 0) |
|
257 pr_info("copybreak disabled\n"); |
|
258 else |
|
259 pr_info("copybreak enabled for " |
|
260 "packets <= %u bytes\n", copybreak); |
|
261 } |
|
262 return ret; |
|
263 } |
|
264 |
|
265 module_init(e1000_init_module); |
|
266 |
|
267 /** |
|
268 * e1000_exit_module - Driver Exit Cleanup Routine |
|
269 * |
|
270 * e1000_exit_module is called just before the driver is removed |
|
271 * from memory. |
|
272 **/ |
|
273 |
|
274 static void __exit e1000_exit_module(void) |
|
275 { |
|
276 pci_unregister_driver(&e1000_driver); |
|
277 } |
|
278 |
|
279 module_exit(e1000_exit_module); |
|
280 |
|
281 static int e1000_request_irq(struct e1000_adapter *adapter) |
|
282 { |
|
283 struct net_device *netdev = adapter->netdev; |
|
284 irq_handler_t handler = e1000_intr; |
|
285 int irq_flags = IRQF_SHARED; |
|
286 int err; |
|
287 |
|
288 if (adapter->ecdev) { |
|
289 return 0; |
|
290 } |
|
291 |
|
292 err = request_irq(adapter->pdev->irq, handler, irq_flags, netdev->name, |
|
293 netdev); |
|
294 if (err) { |
|
295 e_err(probe, "Unable to allocate interrupt Error: %d\n", err); |
|
296 } |
|
297 |
|
298 return err; |
|
299 } |
|
300 |
|
301 static void e1000_free_irq(struct e1000_adapter *adapter) |
|
302 { |
|
303 struct net_device *netdev = adapter->netdev; |
|
304 |
|
305 if (adapter->ecdev) { |
|
306 return; |
|
307 } |
|
308 |
|
309 free_irq(adapter->pdev->irq, netdev); |
|
310 } |
|
311 |
|
312 /** |
|
313 * e1000_irq_disable - Mask off interrupt generation on the NIC |
|
314 * @adapter: board private structure |
|
315 **/ |
|
316 |
|
317 static void e1000_irq_disable(struct e1000_adapter *adapter) |
|
318 { |
|
319 struct e1000_hw *hw = &adapter->hw; |
|
320 |
|
321 if (adapter->ecdev) { |
|
322 return; |
|
323 } |
|
324 |
|
325 ew32(IMC, ~0); |
|
326 E1000_WRITE_FLUSH(); |
|
327 synchronize_irq(adapter->pdev->irq); |
|
328 } |
|
329 |
|
330 /** |
|
331 * e1000_irq_enable - Enable default interrupt generation settings |
|
332 * @adapter: board private structure |
|
333 **/ |
|
334 |
|
335 static void e1000_irq_enable(struct e1000_adapter *adapter) |
|
336 { |
|
337 struct e1000_hw *hw = &adapter->hw; |
|
338 |
|
339 if (adapter->ecdev) { |
|
340 return; |
|
341 } |
|
342 |
|
343 ew32(IMS, IMS_ENABLE_MASK); |
|
344 E1000_WRITE_FLUSH(); |
|
345 } |
|
346 |
|
347 static void e1000_update_mng_vlan(struct e1000_adapter *adapter) |
|
348 { |
|
349 struct e1000_hw *hw = &adapter->hw; |
|
350 struct net_device *netdev = adapter->netdev; |
|
351 u16 vid = hw->mng_cookie.vlan_id; |
|
352 u16 old_vid = adapter->mng_vlan_id; |
|
353 |
|
354 if (!e1000_vlan_used(adapter)) |
|
355 return; |
|
356 |
|
357 if (!test_bit(vid, adapter->active_vlans)) { |
|
358 if (hw->mng_cookie.status & |
|
359 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) { |
|
360 e1000_vlan_rx_add_vid(netdev, vid); |
|
361 adapter->mng_vlan_id = vid; |
|
362 } else { |
|
363 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE; |
|
364 } |
|
365 if ((old_vid != (u16)E1000_MNG_VLAN_NONE) && |
|
366 (vid != old_vid) && |
|
367 !test_bit(old_vid, adapter->active_vlans)) |
|
368 e1000_vlan_rx_kill_vid(netdev, old_vid); |
|
369 } else { |
|
370 adapter->mng_vlan_id = vid; |
|
371 } |
|
372 } |
|
373 |
|
374 static void e1000_init_manageability(struct e1000_adapter *adapter) |
|
375 { |
|
376 struct e1000_hw *hw = &adapter->hw; |
|
377 |
|
378 if (adapter->en_mng_pt) { |
|
379 u32 manc = er32(MANC); |
|
380 |
|
381 /* disable hardware interception of ARP */ |
|
382 manc &= ~(E1000_MANC_ARP_EN); |
|
383 |
|
384 ew32(MANC, manc); |
|
385 } |
|
386 } |
|
387 |
|
388 static void e1000_release_manageability(struct e1000_adapter *adapter) |
|
389 { |
|
390 struct e1000_hw *hw = &adapter->hw; |
|
391 |
|
392 if (adapter->en_mng_pt) { |
|
393 u32 manc = er32(MANC); |
|
394 |
|
395 /* re-enable hardware interception of ARP */ |
|
396 manc |= E1000_MANC_ARP_EN; |
|
397 |
|
398 ew32(MANC, manc); |
|
399 } |
|
400 } |
|
401 |
|
402 /** |
|
403 * e1000_configure - configure the hardware for RX and TX |
|
404 * @adapter = private board structure |
|
405 **/ |
|
406 static void e1000_configure(struct e1000_adapter *adapter) |
|
407 { |
|
408 struct net_device *netdev = adapter->netdev; |
|
409 int i; |
|
410 |
|
411 e1000_set_rx_mode(netdev); |
|
412 |
|
413 e1000_restore_vlan(adapter); |
|
414 e1000_init_manageability(adapter); |
|
415 |
|
416 e1000_configure_tx(adapter); |
|
417 e1000_setup_rctl(adapter); |
|
418 e1000_configure_rx(adapter); |
|
419 /* call E1000_DESC_UNUSED which always leaves |
|
420 * at least 1 descriptor unused to make sure |
|
421 * next_to_use != next_to_clean */ |
|
422 for (i = 0; i < adapter->num_rx_queues; i++) { |
|
423 struct e1000_rx_ring *ring = &adapter->rx_ring[i]; |
|
424 if (adapter->ecdev) { |
|
425 /* fill rx ring completely! */ |
|
426 adapter->alloc_rx_buf(adapter, ring, ring->count); |
|
427 } else { |
|
428 /* this one leaves the last ring element unallocated! */ |
|
429 adapter->alloc_rx_buf(adapter, ring, |
|
430 E1000_DESC_UNUSED(ring)); |
|
431 } |
|
432 } |
|
433 } |
|
434 |
|
435 int e1000_up(struct e1000_adapter *adapter) |
|
436 { |
|
437 struct e1000_hw *hw = &adapter->hw; |
|
438 |
|
439 /* hardware has been reset, we need to reload some things */ |
|
440 e1000_configure(adapter); |
|
441 |
|
442 clear_bit(__E1000_DOWN, &adapter->flags); |
|
443 |
|
444 if (!adapter->ecdev) { |
|
445 napi_enable(&adapter->napi); |
|
446 |
|
447 e1000_irq_enable(adapter); |
|
448 |
|
449 netif_wake_queue(adapter->netdev); |
|
450 |
|
451 /* fire a link change interrupt to start the watchdog */ |
|
452 ew32(ICS, E1000_ICS_LSC); |
|
453 } |
|
454 return 0; |
|
455 } |
|
456 |
|
457 /** |
|
458 * e1000_power_up_phy - restore link in case the phy was powered down |
|
459 * @adapter: address of board private structure |
|
460 * |
|
461 * The phy may be powered down to save power and turn off link when the |
|
462 * driver is unloaded and wake on lan is not enabled (among others) |
|
463 * *** this routine MUST be followed by a call to e1000_reset *** |
|
464 * |
|
465 **/ |
|
466 |
|
467 void e1000_power_up_phy(struct e1000_adapter *adapter) |
|
468 { |
|
469 struct e1000_hw *hw = &adapter->hw; |
|
470 u16 mii_reg = 0; |
|
471 |
|
472 /* Just clear the power down bit to wake the phy back up */ |
|
473 if (hw->media_type == e1000_media_type_copper) { |
|
474 /* according to the manual, the phy will retain its |
|
475 * settings across a power-down/up cycle */ |
|
476 e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg); |
|
477 mii_reg &= ~MII_CR_POWER_DOWN; |
|
478 e1000_write_phy_reg(hw, PHY_CTRL, mii_reg); |
|
479 } |
|
480 } |
|
481 |
|
482 static void e1000_power_down_phy(struct e1000_adapter *adapter) |
|
483 { |
|
484 struct e1000_hw *hw = &adapter->hw; |
|
485 |
|
486 /* Power down the PHY so no link is implied when interface is down * |
|
487 * The PHY cannot be powered down if any of the following is true * |
|
488 * (a) WoL is enabled |
|
489 * (b) AMT is active |
|
490 * (c) SoL/IDER session is active */ |
|
491 if (!adapter->wol && hw->mac_type >= e1000_82540 && |
|
492 hw->media_type == e1000_media_type_copper) { |
|
493 u16 mii_reg = 0; |
|
494 |
|
495 switch (hw->mac_type) { |
|
496 case e1000_82540: |
|
497 case e1000_82545: |
|
498 case e1000_82545_rev_3: |
|
499 case e1000_82546: |
|
500 case e1000_ce4100: |
|
501 case e1000_82546_rev_3: |
|
502 case e1000_82541: |
|
503 case e1000_82541_rev_2: |
|
504 case e1000_82547: |
|
505 case e1000_82547_rev_2: |
|
506 if (er32(MANC) & E1000_MANC_SMBUS_EN) |
|
507 goto out; |
|
508 break; |
|
509 default: |
|
510 goto out; |
|
511 } |
|
512 e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg); |
|
513 mii_reg |= MII_CR_POWER_DOWN; |
|
514 e1000_write_phy_reg(hw, PHY_CTRL, mii_reg); |
|
515 msleep(1); |
|
516 } |
|
517 out: |
|
518 return; |
|
519 } |
|
520 |
|
521 static void e1000_down_and_stop(struct e1000_adapter *adapter) |
|
522 { |
|
523 set_bit(__E1000_DOWN, &adapter->flags); |
|
524 |
|
525 /* Only kill reset task if adapter is not resetting */ |
|
526 if (!test_bit(__E1000_RESETTING, &adapter->flags)) |
|
527 cancel_work_sync(&adapter->reset_task); |
|
528 |
|
529 if (!adapter->ecdev) { |
|
530 cancel_delayed_work_sync(&adapter->watchdog_task); |
|
531 cancel_delayed_work_sync(&adapter->phy_info_task); |
|
532 cancel_delayed_work_sync(&adapter->fifo_stall_task); |
|
533 } |
|
534 } |
|
535 |
|
536 void e1000_down(struct e1000_adapter *adapter) |
|
537 { |
|
538 struct e1000_hw *hw = &adapter->hw; |
|
539 struct net_device *netdev = adapter->netdev; |
|
540 u32 rctl, tctl; |
|
541 |
|
542 |
|
543 /* disable receives in the hardware */ |
|
544 rctl = er32(RCTL); |
|
545 ew32(RCTL, rctl & ~E1000_RCTL_EN); |
|
546 |
|
547 if (!adapter->ecdev) { |
|
548 /* flush and sleep below */ |
|
549 netif_tx_disable(netdev); |
|
550 } |
|
551 |
|
552 /* disable transmits in the hardware */ |
|
553 tctl = er32(TCTL); |
|
554 tctl &= ~E1000_TCTL_EN; |
|
555 ew32(TCTL, tctl); |
|
556 /* flush both disables and wait for them to finish */ |
|
557 E1000_WRITE_FLUSH(); |
|
558 msleep(10); |
|
559 |
|
560 if (!adapter->ecdev) { |
|
561 napi_disable(&adapter->napi); |
|
562 |
|
563 e1000_irq_disable(adapter); |
|
564 } |
|
565 |
|
566 /* |
|
567 * Setting DOWN must be after irq_disable to prevent |
|
568 * a screaming interrupt. Setting DOWN also prevents |
|
569 * tasks from rescheduling. |
|
570 */ |
|
571 e1000_down_and_stop(adapter); |
|
572 |
|
573 adapter->link_speed = 0; |
|
574 adapter->link_duplex = 0; |
|
575 |
|
576 if (!adapter->ecdev) { |
|
577 netif_carrier_off(netdev); |
|
578 } |
|
579 |
|
580 e1000_reset(adapter); |
|
581 e1000_clean_all_tx_rings(adapter); |
|
582 e1000_clean_all_rx_rings(adapter); |
|
583 } |
|
584 |
|
585 static void e1000_reinit_safe(struct e1000_adapter *adapter) |
|
586 { |
|
587 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags)) |
|
588 msleep(1); |
|
589 mutex_lock(&adapter->mutex); |
|
590 e1000_down(adapter); |
|
591 e1000_up(adapter); |
|
592 mutex_unlock(&adapter->mutex); |
|
593 clear_bit(__E1000_RESETTING, &adapter->flags); |
|
594 } |
|
595 |
|
596 void e1000_reinit_locked(struct e1000_adapter *adapter) |
|
597 { |
|
598 /* if rtnl_lock is not held the call path is bogus */ |
|
599 ASSERT_RTNL(); |
|
600 WARN_ON(in_interrupt()); |
|
601 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags)) |
|
602 msleep(1); |
|
603 e1000_down(adapter); |
|
604 e1000_up(adapter); |
|
605 clear_bit(__E1000_RESETTING, &adapter->flags); |
|
606 } |
|
607 |
|
608 void e1000_reset(struct e1000_adapter *adapter) |
|
609 { |
|
610 struct e1000_hw *hw = &adapter->hw; |
|
611 u32 pba = 0, tx_space, min_tx_space, min_rx_space; |
|
612 bool legacy_pba_adjust = false; |
|
613 u16 hwm; |
|
614 |
|
615 /* Repartition Pba for greater than 9k mtu |
|
616 * To take effect CTRL.RST is required. |
|
617 */ |
|
618 |
|
619 switch (hw->mac_type) { |
|
620 case e1000_82542_rev2_0: |
|
621 case e1000_82542_rev2_1: |
|
622 case e1000_82543: |
|
623 case e1000_82544: |
|
624 case e1000_82540: |
|
625 case e1000_82541: |
|
626 case e1000_82541_rev_2: |
|
627 legacy_pba_adjust = true; |
|
628 pba = E1000_PBA_48K; |
|
629 break; |
|
630 case e1000_82545: |
|
631 case e1000_82545_rev_3: |
|
632 case e1000_82546: |
|
633 case e1000_ce4100: |
|
634 case e1000_82546_rev_3: |
|
635 pba = E1000_PBA_48K; |
|
636 break; |
|
637 case e1000_82547: |
|
638 case e1000_82547_rev_2: |
|
639 legacy_pba_adjust = true; |
|
640 pba = E1000_PBA_30K; |
|
641 break; |
|
642 case e1000_undefined: |
|
643 case e1000_num_macs: |
|
644 break; |
|
645 } |
|
646 |
|
647 if (legacy_pba_adjust) { |
|
648 if (hw->max_frame_size > E1000_RXBUFFER_8192) |
|
649 pba -= 8; /* allocate more FIFO for Tx */ |
|
650 |
|
651 if (hw->mac_type == e1000_82547) { |
|
652 adapter->tx_fifo_head = 0; |
|
653 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT; |
|
654 adapter->tx_fifo_size = |
|
655 (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT; |
|
656 atomic_set(&adapter->tx_fifo_stall, 0); |
|
657 } |
|
658 } else if (hw->max_frame_size > ETH_FRAME_LEN + ETH_FCS_LEN) { |
|
659 /* adjust PBA for jumbo frames */ |
|
660 ew32(PBA, pba); |
|
661 |
|
662 /* To maintain wire speed transmits, the Tx FIFO should be |
|
663 * large enough to accommodate two full transmit packets, |
|
664 * rounded up to the next 1KB and expressed in KB. Likewise, |
|
665 * the Rx FIFO should be large enough to accommodate at least |
|
666 * one full receive packet and is similarly rounded up and |
|
667 * expressed in KB. */ |
|
668 pba = er32(PBA); |
|
669 /* upper 16 bits has Tx packet buffer allocation size in KB */ |
|
670 tx_space = pba >> 16; |
|
671 /* lower 16 bits has Rx packet buffer allocation size in KB */ |
|
672 pba &= 0xffff; |
|
673 /* |
|
674 * the tx fifo also stores 16 bytes of information about the tx |
|
675 * but don't include ethernet FCS because hardware appends it |
|
676 */ |
|
677 min_tx_space = (hw->max_frame_size + |
|
678 sizeof(struct e1000_tx_desc) - |
|
679 ETH_FCS_LEN) * 2; |
|
680 min_tx_space = ALIGN(min_tx_space, 1024); |
|
681 min_tx_space >>= 10; |
|
682 /* software strips receive CRC, so leave room for it */ |
|
683 min_rx_space = hw->max_frame_size; |
|
684 min_rx_space = ALIGN(min_rx_space, 1024); |
|
685 min_rx_space >>= 10; |
|
686 |
|
687 /* If current Tx allocation is less than the min Tx FIFO size, |
|
688 * and the min Tx FIFO size is less than the current Rx FIFO |
|
689 * allocation, take space away from current Rx allocation */ |
|
690 if (tx_space < min_tx_space && |
|
691 ((min_tx_space - tx_space) < pba)) { |
|
692 pba = pba - (min_tx_space - tx_space); |
|
693 |
|
694 /* PCI/PCIx hardware has PBA alignment constraints */ |
|
695 switch (hw->mac_type) { |
|
696 case e1000_82545 ... e1000_82546_rev_3: |
|
697 pba &= ~(E1000_PBA_8K - 1); |
|
698 break; |
|
699 default: |
|
700 break; |
|
701 } |
|
702 |
|
703 /* if short on rx space, rx wins and must trump tx |
|
704 * adjustment or use Early Receive if available */ |
|
705 if (pba < min_rx_space) |
|
706 pba = min_rx_space; |
|
707 } |
|
708 } |
|
709 |
|
710 ew32(PBA, pba); |
|
711 |
|
712 /* |
|
713 * flow control settings: |
|
714 * The high water mark must be low enough to fit one full frame |
|
715 * (or the size used for early receive) above it in the Rx FIFO. |
|
716 * Set it to the lower of: |
|
717 * - 90% of the Rx FIFO size, and |
|
718 * - the full Rx FIFO size minus the early receive size (for parts |
|
719 * with ERT support assuming ERT set to E1000_ERT_2048), or |
|
720 * - the full Rx FIFO size minus one full frame |
|
721 */ |
|
722 hwm = min(((pba << 10) * 9 / 10), |
|
723 ((pba << 10) - hw->max_frame_size)); |
|
724 |
|
725 hw->fc_high_water = hwm & 0xFFF8; /* 8-byte granularity */ |
|
726 hw->fc_low_water = hw->fc_high_water - 8; |
|
727 hw->fc_pause_time = E1000_FC_PAUSE_TIME; |
|
728 hw->fc_send_xon = 1; |
|
729 hw->fc = hw->original_fc; |
|
730 |
|
731 /* Allow time for pending master requests to run */ |
|
732 e1000_reset_hw(hw); |
|
733 if (hw->mac_type >= e1000_82544) |
|
734 ew32(WUC, 0); |
|
735 |
|
736 if (e1000_init_hw(hw)) |
|
737 e_dev_err("Hardware Error\n"); |
|
738 e1000_update_mng_vlan(adapter); |
|
739 |
|
740 /* if (adapter->hwflags & HWFLAGS_PHY_PWR_BIT) { */ |
|
741 if (hw->mac_type >= e1000_82544 && |
|
742 hw->autoneg == 1 && |
|
743 hw->autoneg_advertised == ADVERTISE_1000_FULL) { |
|
744 u32 ctrl = er32(CTRL); |
|
745 /* clear phy power management bit if we are in gig only mode, |
|
746 * which if enabled will attempt negotiation to 100Mb, which |
|
747 * can cause a loss of link at power off or driver unload */ |
|
748 ctrl &= ~E1000_CTRL_SWDPIN3; |
|
749 ew32(CTRL, ctrl); |
|
750 } |
|
751 |
|
752 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */ |
|
753 ew32(VET, ETHERNET_IEEE_VLAN_TYPE); |
|
754 |
|
755 e1000_reset_adaptive(hw); |
|
756 e1000_phy_get_info(hw, &adapter->phy_info); |
|
757 |
|
758 e1000_release_manageability(adapter); |
|
759 } |
|
760 |
|
761 /** |
|
762 * Dump the eeprom for users having checksum issues |
|
763 **/ |
|
764 static void e1000_dump_eeprom(struct e1000_adapter *adapter) |
|
765 { |
|
766 struct net_device *netdev = adapter->netdev; |
|
767 struct ethtool_eeprom eeprom; |
|
768 const struct ethtool_ops *ops = netdev->ethtool_ops; |
|
769 u8 *data; |
|
770 int i; |
|
771 u16 csum_old, csum_new = 0; |
|
772 |
|
773 eeprom.len = ops->get_eeprom_len(netdev); |
|
774 eeprom.offset = 0; |
|
775 |
|
776 data = kmalloc(eeprom.len, GFP_KERNEL); |
|
777 if (!data) |
|
778 return; |
|
779 |
|
780 ops->get_eeprom(netdev, &eeprom, data); |
|
781 |
|
782 csum_old = (data[EEPROM_CHECKSUM_REG * 2]) + |
|
783 (data[EEPROM_CHECKSUM_REG * 2 + 1] << 8); |
|
784 for (i = 0; i < EEPROM_CHECKSUM_REG * 2; i += 2) |
|
785 csum_new += data[i] + (data[i + 1] << 8); |
|
786 csum_new = EEPROM_SUM - csum_new; |
|
787 |
|
788 pr_err("/*********************/\n"); |
|
789 pr_err("Current EEPROM Checksum : 0x%04x\n", csum_old); |
|
790 pr_err("Calculated : 0x%04x\n", csum_new); |
|
791 |
|
792 pr_err("Offset Values\n"); |
|
793 pr_err("======== ======\n"); |
|
794 print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 16, 1, data, 128, 0); |
|
795 |
|
796 pr_err("Include this output when contacting your support provider.\n"); |
|
797 pr_err("This is not a software error! Something bad happened to\n"); |
|
798 pr_err("your hardware or EEPROM image. Ignoring this problem could\n"); |
|
799 pr_err("result in further problems, possibly loss of data,\n"); |
|
800 pr_err("corruption or system hangs!\n"); |
|
801 pr_err("The MAC Address will be reset to 00:00:00:00:00:00,\n"); |
|
802 pr_err("which is invalid and requires you to set the proper MAC\n"); |
|
803 pr_err("address manually before continuing to enable this network\n"); |
|
804 pr_err("device. Please inspect the EEPROM dump and report the\n"); |
|
805 pr_err("issue to your hardware vendor or Intel Customer Support.\n"); |
|
806 pr_err("/*********************/\n"); |
|
807 |
|
808 kfree(data); |
|
809 } |
|
810 |
|
811 /** |
|
812 * e1000_is_need_ioport - determine if an adapter needs ioport resources or not |
|
813 * @pdev: PCI device information struct |
|
814 * |
|
815 * Return true if an adapter needs ioport resources |
|
816 **/ |
|
817 static int e1000_is_need_ioport(struct pci_dev *pdev) |
|
818 { |
|
819 switch (pdev->device) { |
|
820 case E1000_DEV_ID_82540EM: |
|
821 case E1000_DEV_ID_82540EM_LOM: |
|
822 case E1000_DEV_ID_82540EP: |
|
823 case E1000_DEV_ID_82540EP_LOM: |
|
824 case E1000_DEV_ID_82540EP_LP: |
|
825 case E1000_DEV_ID_82541EI: |
|
826 case E1000_DEV_ID_82541EI_MOBILE: |
|
827 case E1000_DEV_ID_82541ER: |
|
828 case E1000_DEV_ID_82541ER_LOM: |
|
829 case E1000_DEV_ID_82541GI: |
|
830 case E1000_DEV_ID_82541GI_LF: |
|
831 case E1000_DEV_ID_82541GI_MOBILE: |
|
832 case E1000_DEV_ID_82544EI_COPPER: |
|
833 case E1000_DEV_ID_82544EI_FIBER: |
|
834 case E1000_DEV_ID_82544GC_COPPER: |
|
835 case E1000_DEV_ID_82544GC_LOM: |
|
836 case E1000_DEV_ID_82545EM_COPPER: |
|
837 case E1000_DEV_ID_82545EM_FIBER: |
|
838 case E1000_DEV_ID_82546EB_COPPER: |
|
839 case E1000_DEV_ID_82546EB_FIBER: |
|
840 case E1000_DEV_ID_82546EB_QUAD_COPPER: |
|
841 return true; |
|
842 default: |
|
843 return false; |
|
844 } |
|
845 } |
|
846 |
|
847 static netdev_features_t e1000_fix_features(struct net_device *netdev, |
|
848 netdev_features_t features) |
|
849 { |
|
850 /* |
|
851 * Since there is no support for separate rx/tx vlan accel |
|
852 * enable/disable make sure tx flag is always in same state as rx. |
|
853 */ |
|
854 if (features & NETIF_F_HW_VLAN_RX) |
|
855 features |= NETIF_F_HW_VLAN_TX; |
|
856 else |
|
857 features &= ~NETIF_F_HW_VLAN_TX; |
|
858 |
|
859 return features; |
|
860 } |
|
861 |
|
862 static int e1000_set_features(struct net_device *netdev, |
|
863 netdev_features_t features) |
|
864 { |
|
865 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
866 netdev_features_t changed = features ^ netdev->features; |
|
867 |
|
868 if (changed & NETIF_F_HW_VLAN_RX) |
|
869 e1000_vlan_mode(netdev, features); |
|
870 |
|
871 if (!(changed & NETIF_F_RXCSUM)) |
|
872 return 0; |
|
873 |
|
874 adapter->rx_csum = !!(features & NETIF_F_RXCSUM); |
|
875 |
|
876 if (netif_running(netdev)) |
|
877 e1000_reinit_locked(adapter); |
|
878 else |
|
879 e1000_reset(adapter); |
|
880 |
|
881 return 0; |
|
882 } |
|
883 |
|
884 static const struct net_device_ops e1000_netdev_ops = { |
|
885 .ndo_open = e1000_open, |
|
886 .ndo_stop = e1000_close, |
|
887 .ndo_start_xmit = e1000_xmit_frame, |
|
888 .ndo_get_stats = e1000_get_stats, |
|
889 .ndo_set_rx_mode = e1000_set_rx_mode, |
|
890 .ndo_set_mac_address = e1000_set_mac, |
|
891 .ndo_tx_timeout = e1000_tx_timeout, |
|
892 .ndo_change_mtu = e1000_change_mtu, |
|
893 .ndo_do_ioctl = e1000_ioctl, |
|
894 .ndo_validate_addr = eth_validate_addr, |
|
895 .ndo_vlan_rx_add_vid = e1000_vlan_rx_add_vid, |
|
896 .ndo_vlan_rx_kill_vid = e1000_vlan_rx_kill_vid, |
|
897 #ifdef CONFIG_NET_POLL_CONTROLLER |
|
898 .ndo_poll_controller = e1000_netpoll, |
|
899 #endif |
|
900 .ndo_fix_features = e1000_fix_features, |
|
901 .ndo_set_features = e1000_set_features, |
|
902 }; |
|
903 |
|
904 /** |
|
905 * e1000_init_hw_struct - initialize members of hw struct |
|
906 * @adapter: board private struct |
|
907 * @hw: structure used by e1000_hw.c |
|
908 * |
|
909 * Factors out initialization of the e1000_hw struct to its own function |
|
910 * that can be called very early at init (just after struct allocation). |
|
911 * Fields are initialized based on PCI device information and |
|
912 * OS network device settings (MTU size). |
|
913 * Returns negative error codes if MAC type setup fails. |
|
914 */ |
|
915 static int e1000_init_hw_struct(struct e1000_adapter *adapter, |
|
916 struct e1000_hw *hw) |
|
917 { |
|
918 struct pci_dev *pdev = adapter->pdev; |
|
919 |
|
920 /* PCI config space info */ |
|
921 hw->vendor_id = pdev->vendor; |
|
922 hw->device_id = pdev->device; |
|
923 hw->subsystem_vendor_id = pdev->subsystem_vendor; |
|
924 hw->subsystem_id = pdev->subsystem_device; |
|
925 hw->revision_id = pdev->revision; |
|
926 |
|
927 pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word); |
|
928 |
|
929 hw->max_frame_size = adapter->netdev->mtu + |
|
930 ENET_HEADER_SIZE + ETHERNET_FCS_SIZE; |
|
931 hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE; |
|
932 |
|
933 /* identify the MAC */ |
|
934 if (e1000_set_mac_type(hw)) { |
|
935 e_err(probe, "Unknown MAC Type\n"); |
|
936 return -EIO; |
|
937 } |
|
938 |
|
939 switch (hw->mac_type) { |
|
940 default: |
|
941 break; |
|
942 case e1000_82541: |
|
943 case e1000_82547: |
|
944 case e1000_82541_rev_2: |
|
945 case e1000_82547_rev_2: |
|
946 hw->phy_init_script = 1; |
|
947 break; |
|
948 } |
|
949 |
|
950 e1000_set_media_type(hw); |
|
951 e1000_get_bus_info(hw); |
|
952 |
|
953 hw->wait_autoneg_complete = false; |
|
954 hw->tbi_compatibility_en = true; |
|
955 hw->adaptive_ifs = true; |
|
956 |
|
957 /* Copper options */ |
|
958 |
|
959 if (hw->media_type == e1000_media_type_copper) { |
|
960 hw->mdix = AUTO_ALL_MODES; |
|
961 hw->disable_polarity_correction = false; |
|
962 hw->master_slave = E1000_MASTER_SLAVE; |
|
963 } |
|
964 |
|
965 return 0; |
|
966 } |
|
967 |
|
968 /** |
|
969 * e1000_probe - Device Initialization Routine |
|
970 * @pdev: PCI device information struct |
|
971 * @ent: entry in e1000_pci_tbl |
|
972 * |
|
973 * Returns 0 on success, negative on failure |
|
974 * |
|
975 * e1000_probe initializes an adapter identified by a pci_dev structure. |
|
976 * The OS initialization, configuring of the adapter private structure, |
|
977 * and a hardware reset occur. |
|
978 **/ |
|
979 static int __devinit e1000_probe(struct pci_dev *pdev, |
|
980 const struct pci_device_id *ent) |
|
981 { |
|
982 struct net_device *netdev; |
|
983 struct e1000_adapter *adapter; |
|
984 struct e1000_hw *hw; |
|
985 |
|
986 static int cards_found = 0; |
|
987 static int global_quad_port_a = 0; /* global ksp3 port a indication */ |
|
988 int i, err, pci_using_dac; |
|
989 u16 eeprom_data = 0; |
|
990 u16 tmp = 0; |
|
991 u16 eeprom_apme_mask = E1000_EEPROM_APME; |
|
992 int bars, need_ioport; |
|
993 |
|
994 /* do not allocate ioport bars when not needed */ |
|
995 need_ioport = e1000_is_need_ioport(pdev); |
|
996 if (need_ioport) { |
|
997 bars = pci_select_bars(pdev, IORESOURCE_MEM | IORESOURCE_IO); |
|
998 err = pci_enable_device(pdev); |
|
999 } else { |
|
1000 bars = pci_select_bars(pdev, IORESOURCE_MEM); |
|
1001 err = pci_enable_device_mem(pdev); |
|
1002 } |
|
1003 if (err) |
|
1004 return err; |
|
1005 |
|
1006 err = pci_request_selected_regions(pdev, bars, e1000_driver_name); |
|
1007 if (err) |
|
1008 goto err_pci_reg; |
|
1009 |
|
1010 pci_set_master(pdev); |
|
1011 err = pci_save_state(pdev); |
|
1012 if (err) |
|
1013 goto err_alloc_etherdev; |
|
1014 |
|
1015 err = -ENOMEM; |
|
1016 netdev = alloc_etherdev(sizeof(struct e1000_adapter)); |
|
1017 if (!netdev) |
|
1018 goto err_alloc_etherdev; |
|
1019 |
|
1020 SET_NETDEV_DEV(netdev, &pdev->dev); |
|
1021 |
|
1022 pci_set_drvdata(pdev, netdev); |
|
1023 adapter = netdev_priv(netdev); |
|
1024 adapter->netdev = netdev; |
|
1025 adapter->pdev = pdev; |
|
1026 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE); |
|
1027 adapter->bars = bars; |
|
1028 adapter->need_ioport = need_ioport; |
|
1029 |
|
1030 hw = &adapter->hw; |
|
1031 hw->back = adapter; |
|
1032 |
|
1033 err = -EIO; |
|
1034 hw->hw_addr = pci_ioremap_bar(pdev, BAR_0); |
|
1035 if (!hw->hw_addr) |
|
1036 goto err_ioremap; |
|
1037 |
|
1038 if (adapter->need_ioport) { |
|
1039 for (i = BAR_1; i <= BAR_5; i++) { |
|
1040 if (pci_resource_len(pdev, i) == 0) |
|
1041 continue; |
|
1042 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) { |
|
1043 hw->io_base = pci_resource_start(pdev, i); |
|
1044 break; |
|
1045 } |
|
1046 } |
|
1047 } |
|
1048 |
|
1049 /* make ready for any if (hw->...) below */ |
|
1050 err = e1000_init_hw_struct(adapter, hw); |
|
1051 if (err) |
|
1052 goto err_sw_init; |
|
1053 |
|
1054 /* |
|
1055 * there is a workaround being applied below that limits |
|
1056 * 64-bit DMA addresses to 64-bit hardware. There are some |
|
1057 * 32-bit adapters that Tx hang when given 64-bit DMA addresses |
|
1058 */ |
|
1059 pci_using_dac = 0; |
|
1060 if ((hw->bus_type == e1000_bus_type_pcix) && |
|
1061 !dma_set_mask(&pdev->dev, DMA_BIT_MASK(64))) { |
|
1062 /* |
|
1063 * according to DMA-API-HOWTO, coherent calls will always |
|
1064 * succeed if the set call did |
|
1065 */ |
|
1066 dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64)); |
|
1067 pci_using_dac = 1; |
|
1068 } else { |
|
1069 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)); |
|
1070 if (err) { |
|
1071 pr_err("No usable DMA config, aborting\n"); |
|
1072 goto err_dma; |
|
1073 } |
|
1074 dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)); |
|
1075 } |
|
1076 |
|
1077 netdev->netdev_ops = &e1000_netdev_ops; |
|
1078 e1000_set_ethtool_ops(netdev); |
|
1079 netdev->watchdog_timeo = 5 * HZ; |
|
1080 netif_napi_add(netdev, &adapter->napi, e1000_clean, 64); |
|
1081 |
|
1082 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1); |
|
1083 |
|
1084 adapter->bd_number = cards_found; |
|
1085 |
|
1086 /* setup the private structure */ |
|
1087 |
|
1088 err = e1000_sw_init(adapter); |
|
1089 if (err) |
|
1090 goto err_sw_init; |
|
1091 |
|
1092 err = -EIO; |
|
1093 if (hw->mac_type == e1000_ce4100) { |
|
1094 hw->ce4100_gbe_mdio_base_virt = |
|
1095 ioremap(pci_resource_start(pdev, BAR_1), |
|
1096 pci_resource_len(pdev, BAR_1)); |
|
1097 |
|
1098 if (!hw->ce4100_gbe_mdio_base_virt) |
|
1099 goto err_mdio_ioremap; |
|
1100 } |
|
1101 |
|
1102 if (hw->mac_type >= e1000_82543) { |
|
1103 netdev->hw_features = NETIF_F_SG | |
|
1104 NETIF_F_HW_CSUM | |
|
1105 NETIF_F_HW_VLAN_RX; |
|
1106 netdev->features = NETIF_F_HW_VLAN_TX | |
|
1107 NETIF_F_HW_VLAN_FILTER; |
|
1108 } |
|
1109 |
|
1110 if ((hw->mac_type >= e1000_82544) && |
|
1111 (hw->mac_type != e1000_82547)) |
|
1112 netdev->hw_features |= NETIF_F_TSO; |
|
1113 |
|
1114 netdev->priv_flags |= IFF_SUPP_NOFCS; |
|
1115 |
|
1116 netdev->features |= netdev->hw_features; |
|
1117 netdev->hw_features |= NETIF_F_RXCSUM; |
|
1118 netdev->hw_features |= NETIF_F_RXFCS; |
|
1119 |
|
1120 if (pci_using_dac) { |
|
1121 netdev->features |= NETIF_F_HIGHDMA; |
|
1122 netdev->vlan_features |= NETIF_F_HIGHDMA; |
|
1123 } |
|
1124 |
|
1125 netdev->vlan_features |= NETIF_F_TSO; |
|
1126 netdev->vlan_features |= NETIF_F_HW_CSUM; |
|
1127 netdev->vlan_features |= NETIF_F_SG; |
|
1128 |
|
1129 netdev->priv_flags |= IFF_UNICAST_FLT; |
|
1130 |
|
1131 adapter->en_mng_pt = e1000_enable_mng_pass_thru(hw); |
|
1132 |
|
1133 /* initialize eeprom parameters */ |
|
1134 if (e1000_init_eeprom_params(hw)) { |
|
1135 e_err(probe, "EEPROM initialization failed\n"); |
|
1136 goto err_eeprom; |
|
1137 } |
|
1138 |
|
1139 /* before reading the EEPROM, reset the controller to |
|
1140 * put the device in a known good starting state */ |
|
1141 |
|
1142 e1000_reset_hw(hw); |
|
1143 |
|
1144 /* make sure the EEPROM is good */ |
|
1145 if (e1000_validate_eeprom_checksum(hw) < 0) { |
|
1146 e_err(probe, "The EEPROM Checksum Is Not Valid\n"); |
|
1147 e1000_dump_eeprom(adapter); |
|
1148 /* |
|
1149 * set MAC address to all zeroes to invalidate and temporary |
|
1150 * disable this device for the user. This blocks regular |
|
1151 * traffic while still permitting ethtool ioctls from reaching |
|
1152 * the hardware as well as allowing the user to run the |
|
1153 * interface after manually setting a hw addr using |
|
1154 * `ip set address` |
|
1155 */ |
|
1156 memset(hw->mac_addr, 0, netdev->addr_len); |
|
1157 } else { |
|
1158 /* copy the MAC address out of the EEPROM */ |
|
1159 if (e1000_read_mac_addr(hw)) |
|
1160 e_err(probe, "EEPROM Read Error\n"); |
|
1161 } |
|
1162 /* don't block initalization here due to bad MAC address */ |
|
1163 memcpy(netdev->dev_addr, hw->mac_addr, netdev->addr_len); |
|
1164 memcpy(netdev->perm_addr, hw->mac_addr, netdev->addr_len); |
|
1165 |
|
1166 if (!is_valid_ether_addr(netdev->perm_addr)) |
|
1167 e_err(probe, "Invalid MAC Address\n"); |
|
1168 |
|
1169 |
|
1170 INIT_DELAYED_WORK(&adapter->watchdog_task, e1000_watchdog); |
|
1171 INIT_DELAYED_WORK(&adapter->fifo_stall_task, |
|
1172 e1000_82547_tx_fifo_stall_task); |
|
1173 INIT_DELAYED_WORK(&adapter->phy_info_task, e1000_update_phy_info_task); |
|
1174 INIT_WORK(&adapter->reset_task, e1000_reset_task); |
|
1175 |
|
1176 e1000_check_options(adapter); |
|
1177 |
|
1178 /* Initial Wake on LAN setting |
|
1179 * If APM wake is enabled in the EEPROM, |
|
1180 * enable the ACPI Magic Packet filter |
|
1181 */ |
|
1182 |
|
1183 switch (hw->mac_type) { |
|
1184 case e1000_82542_rev2_0: |
|
1185 case e1000_82542_rev2_1: |
|
1186 case e1000_82543: |
|
1187 break; |
|
1188 case e1000_82544: |
|
1189 e1000_read_eeprom(hw, |
|
1190 EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data); |
|
1191 eeprom_apme_mask = E1000_EEPROM_82544_APM; |
|
1192 break; |
|
1193 case e1000_82546: |
|
1194 case e1000_82546_rev_3: |
|
1195 if (er32(STATUS) & E1000_STATUS_FUNC_1){ |
|
1196 e1000_read_eeprom(hw, |
|
1197 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data); |
|
1198 break; |
|
1199 } |
|
1200 /* Fall Through */ |
|
1201 default: |
|
1202 e1000_read_eeprom(hw, |
|
1203 EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data); |
|
1204 break; |
|
1205 } |
|
1206 if (eeprom_data & eeprom_apme_mask) |
|
1207 adapter->eeprom_wol |= E1000_WUFC_MAG; |
|
1208 |
|
1209 /* now that we have the eeprom settings, apply the special cases |
|
1210 * where the eeprom may be wrong or the board simply won't support |
|
1211 * wake on lan on a particular port */ |
|
1212 switch (pdev->device) { |
|
1213 case E1000_DEV_ID_82546GB_PCIE: |
|
1214 adapter->eeprom_wol = 0; |
|
1215 break; |
|
1216 case E1000_DEV_ID_82546EB_FIBER: |
|
1217 case E1000_DEV_ID_82546GB_FIBER: |
|
1218 /* Wake events only supported on port A for dual fiber |
|
1219 * regardless of eeprom setting */ |
|
1220 if (er32(STATUS) & E1000_STATUS_FUNC_1) |
|
1221 adapter->eeprom_wol = 0; |
|
1222 break; |
|
1223 case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3: |
|
1224 /* if quad port adapter, disable WoL on all but port A */ |
|
1225 if (global_quad_port_a != 0) |
|
1226 adapter->eeprom_wol = 0; |
|
1227 else |
|
1228 adapter->quad_port_a = true; |
|
1229 /* Reset for multiple quad port adapters */ |
|
1230 if (++global_quad_port_a == 4) |
|
1231 global_quad_port_a = 0; |
|
1232 break; |
|
1233 } |
|
1234 |
|
1235 /* initialize the wol settings based on the eeprom settings */ |
|
1236 adapter->wol = adapter->eeprom_wol; |
|
1237 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol); |
|
1238 |
|
1239 /* Auto detect PHY address */ |
|
1240 if (hw->mac_type == e1000_ce4100) { |
|
1241 for (i = 0; i < 32; i++) { |
|
1242 hw->phy_addr = i; |
|
1243 e1000_read_phy_reg(hw, PHY_ID2, &tmp); |
|
1244 if (tmp == 0 || tmp == 0xFF) { |
|
1245 if (i == 31) |
|
1246 goto err_eeprom; |
|
1247 continue; |
|
1248 } else |
|
1249 break; |
|
1250 } |
|
1251 } |
|
1252 |
|
1253 /* reset the hardware with the new settings */ |
|
1254 e1000_reset(adapter); |
|
1255 |
|
1256 // offer device to EtherCAT master module |
|
1257 adapter->ecdev = ecdev_offer(netdev, ec_poll, THIS_MODULE); |
|
1258 if (adapter->ecdev) { |
|
1259 if (ecdev_open(adapter->ecdev)) { |
|
1260 ecdev_withdraw(adapter->ecdev); |
|
1261 goto err_register; |
|
1262 } |
|
1263 } else { |
|
1264 strcpy(netdev->name, "eth%d"); |
|
1265 err = register_netdev(netdev); |
|
1266 if (err) |
|
1267 goto err_register; |
|
1268 } |
|
1269 |
|
1270 e1000_vlan_filter_on_off(adapter, false); |
|
1271 |
|
1272 /* print bus type/speed/width info */ |
|
1273 e_info(probe, "(PCI%s:%dMHz:%d-bit) %pM\n", |
|
1274 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" : ""), |
|
1275 ((hw->bus_speed == e1000_bus_speed_133) ? 133 : |
|
1276 (hw->bus_speed == e1000_bus_speed_120) ? 120 : |
|
1277 (hw->bus_speed == e1000_bus_speed_100) ? 100 : |
|
1278 (hw->bus_speed == e1000_bus_speed_66) ? 66 : 33), |
|
1279 ((hw->bus_width == e1000_bus_width_64) ? 64 : 32), |
|
1280 netdev->dev_addr); |
|
1281 |
|
1282 if (!adapter->ecdev) { |
|
1283 /* carrier off reporting is important to ethtool even BEFORE open */ |
|
1284 netif_carrier_off(netdev); |
|
1285 } |
|
1286 |
|
1287 e_info(probe, "Intel(R) PRO/1000 Network Connection\n"); |
|
1288 |
|
1289 cards_found++; |
|
1290 return 0; |
|
1291 |
|
1292 err_register: |
|
1293 err_eeprom: |
|
1294 e1000_phy_hw_reset(hw); |
|
1295 |
|
1296 if (hw->flash_address) |
|
1297 iounmap(hw->flash_address); |
|
1298 kfree(adapter->tx_ring); |
|
1299 kfree(adapter->rx_ring); |
|
1300 err_dma: |
|
1301 err_sw_init: |
|
1302 err_mdio_ioremap: |
|
1303 iounmap(hw->ce4100_gbe_mdio_base_virt); |
|
1304 iounmap(hw->hw_addr); |
|
1305 err_ioremap: |
|
1306 free_netdev(netdev); |
|
1307 err_alloc_etherdev: |
|
1308 pci_release_selected_regions(pdev, bars); |
|
1309 err_pci_reg: |
|
1310 pci_disable_device(pdev); |
|
1311 return err; |
|
1312 } |
|
1313 |
|
1314 /** |
|
1315 * e1000_remove - Device Removal Routine |
|
1316 * @pdev: PCI device information struct |
|
1317 * |
|
1318 * e1000_remove is called by the PCI subsystem to alert the driver |
|
1319 * that it should release a PCI device. The could be caused by a |
|
1320 * Hot-Plug event, or because the driver is going to be removed from |
|
1321 * memory. |
|
1322 **/ |
|
1323 |
|
1324 static void __devexit e1000_remove(struct pci_dev *pdev) |
|
1325 { |
|
1326 struct net_device *netdev = pci_get_drvdata(pdev); |
|
1327 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
1328 struct e1000_hw *hw = &adapter->hw; |
|
1329 |
|
1330 e1000_down_and_stop(adapter); |
|
1331 e1000_release_manageability(adapter); |
|
1332 |
|
1333 if (adapter->ecdev) { |
|
1334 ecdev_close(adapter->ecdev); |
|
1335 ecdev_withdraw(adapter->ecdev); |
|
1336 } else { |
|
1337 unregister_netdev(netdev); |
|
1338 } |
|
1339 |
|
1340 e1000_phy_hw_reset(hw); |
|
1341 |
|
1342 kfree(adapter->tx_ring); |
|
1343 kfree(adapter->rx_ring); |
|
1344 |
|
1345 if (hw->mac_type == e1000_ce4100) |
|
1346 iounmap(hw->ce4100_gbe_mdio_base_virt); |
|
1347 iounmap(hw->hw_addr); |
|
1348 if (hw->flash_address) |
|
1349 iounmap(hw->flash_address); |
|
1350 pci_release_selected_regions(pdev, adapter->bars); |
|
1351 |
|
1352 free_netdev(netdev); |
|
1353 |
|
1354 pci_disable_device(pdev); |
|
1355 } |
|
1356 |
|
1357 /** |
|
1358 * e1000_sw_init - Initialize general software structures (struct e1000_adapter) |
|
1359 * @adapter: board private structure to initialize |
|
1360 * |
|
1361 * e1000_sw_init initializes the Adapter private data structure. |
|
1362 * e1000_init_hw_struct MUST be called before this function |
|
1363 **/ |
|
1364 |
|
1365 static int __devinit e1000_sw_init(struct e1000_adapter *adapter) |
|
1366 { |
|
1367 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE; |
|
1368 |
|
1369 adapter->num_tx_queues = 1; |
|
1370 adapter->num_rx_queues = 1; |
|
1371 |
|
1372 if (e1000_alloc_queues(adapter)) { |
|
1373 e_err(probe, "Unable to allocate memory for queues\n"); |
|
1374 return -ENOMEM; |
|
1375 } |
|
1376 |
|
1377 /* Explicitly disable IRQ since the NIC can be in any state. */ |
|
1378 e1000_irq_disable(adapter); |
|
1379 |
|
1380 spin_lock_init(&adapter->stats_lock); |
|
1381 mutex_init(&adapter->mutex); |
|
1382 |
|
1383 set_bit(__E1000_DOWN, &adapter->flags); |
|
1384 |
|
1385 return 0; |
|
1386 } |
|
1387 |
|
1388 /** |
|
1389 * e1000_alloc_queues - Allocate memory for all rings |
|
1390 * @adapter: board private structure to initialize |
|
1391 * |
|
1392 * We allocate one ring per queue at run-time since we don't know the |
|
1393 * number of queues at compile-time. |
|
1394 **/ |
|
1395 |
|
1396 static int __devinit e1000_alloc_queues(struct e1000_adapter *adapter) |
|
1397 { |
|
1398 adapter->tx_ring = kcalloc(adapter->num_tx_queues, |
|
1399 sizeof(struct e1000_tx_ring), GFP_KERNEL); |
|
1400 if (!adapter->tx_ring) |
|
1401 return -ENOMEM; |
|
1402 |
|
1403 adapter->rx_ring = kcalloc(adapter->num_rx_queues, |
|
1404 sizeof(struct e1000_rx_ring), GFP_KERNEL); |
|
1405 if (!adapter->rx_ring) { |
|
1406 kfree(adapter->tx_ring); |
|
1407 return -ENOMEM; |
|
1408 } |
|
1409 |
|
1410 return E1000_SUCCESS; |
|
1411 } |
|
1412 |
|
1413 /** |
|
1414 * e1000_open - Called when a network interface is made active |
|
1415 * @netdev: network interface device structure |
|
1416 * |
|
1417 * Returns 0 on success, negative value on failure |
|
1418 * |
|
1419 * The open entry point is called when a network interface is made |
|
1420 * active by the system (IFF_UP). At this point all resources needed |
|
1421 * for transmit and receive operations are allocated, the interrupt |
|
1422 * handler is registered with the OS, the watchdog task is started, |
|
1423 * and the stack is notified that the interface is ready. |
|
1424 **/ |
|
1425 |
|
1426 static int e1000_open(struct net_device *netdev) |
|
1427 { |
|
1428 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
1429 struct e1000_hw *hw = &adapter->hw; |
|
1430 int err; |
|
1431 |
|
1432 /* disallow open during test */ |
|
1433 if (test_bit(__E1000_TESTING, &adapter->flags)) |
|
1434 return -EBUSY; |
|
1435 |
|
1436 netif_carrier_off(netdev); |
|
1437 |
|
1438 /* allocate transmit descriptors */ |
|
1439 err = e1000_setup_all_tx_resources(adapter); |
|
1440 if (err) |
|
1441 goto err_setup_tx; |
|
1442 |
|
1443 /* allocate receive descriptors */ |
|
1444 err = e1000_setup_all_rx_resources(adapter); |
|
1445 if (err) |
|
1446 goto err_setup_rx; |
|
1447 |
|
1448 e1000_power_up_phy(adapter); |
|
1449 |
|
1450 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE; |
|
1451 if ((hw->mng_cookie.status & |
|
1452 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) { |
|
1453 e1000_update_mng_vlan(adapter); |
|
1454 } |
|
1455 |
|
1456 /* before we allocate an interrupt, we must be ready to handle it. |
|
1457 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt |
|
1458 * as soon as we call pci_request_irq, so we have to setup our |
|
1459 * clean_rx handler before we do so. */ |
|
1460 e1000_configure(adapter); |
|
1461 |
|
1462 err = e1000_request_irq(adapter); |
|
1463 if (err) |
|
1464 goto err_req_irq; |
|
1465 |
|
1466 /* From here on the code is the same as e1000_up() */ |
|
1467 clear_bit(__E1000_DOWN, &adapter->flags); |
|
1468 |
|
1469 if (!adapter->ecdev) { |
|
1470 napi_enable(&adapter->napi); |
|
1471 |
|
1472 e1000_irq_enable(adapter); |
|
1473 |
|
1474 netif_start_queue(netdev); |
|
1475 } |
|
1476 |
|
1477 /* fire a link status change interrupt to start the watchdog */ |
|
1478 ew32(ICS, E1000_ICS_LSC); |
|
1479 |
|
1480 return E1000_SUCCESS; |
|
1481 |
|
1482 err_req_irq: |
|
1483 e1000_power_down_phy(adapter); |
|
1484 e1000_free_all_rx_resources(adapter); |
|
1485 err_setup_rx: |
|
1486 e1000_free_all_tx_resources(adapter); |
|
1487 err_setup_tx: |
|
1488 e1000_reset(adapter); |
|
1489 |
|
1490 return err; |
|
1491 } |
|
1492 |
|
1493 /** |
|
1494 * e1000_close - Disables a network interface |
|
1495 * @netdev: network interface device structure |
|
1496 * |
|
1497 * Returns 0, this is not allowed to fail |
|
1498 * |
|
1499 * The close entry point is called when an interface is de-activated |
|
1500 * by the OS. The hardware is still under the drivers control, but |
|
1501 * needs to be disabled. A global MAC reset is issued to stop the |
|
1502 * hardware, and all transmit and receive resources are freed. |
|
1503 **/ |
|
1504 |
|
1505 static int e1000_close(struct net_device *netdev) |
|
1506 { |
|
1507 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
1508 struct e1000_hw *hw = &adapter->hw; |
|
1509 |
|
1510 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags)); |
|
1511 e1000_down(adapter); |
|
1512 e1000_power_down_phy(adapter); |
|
1513 e1000_free_irq(adapter); |
|
1514 |
|
1515 e1000_free_all_tx_resources(adapter); |
|
1516 e1000_free_all_rx_resources(adapter); |
|
1517 |
|
1518 /* kill manageability vlan ID if supported, but not if a vlan with |
|
1519 * the same ID is registered on the host OS (let 8021q kill it) */ |
|
1520 if ((hw->mng_cookie.status & |
|
1521 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) && |
|
1522 !test_bit(adapter->mng_vlan_id, adapter->active_vlans)) { |
|
1523 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id); |
|
1524 } |
|
1525 |
|
1526 return 0; |
|
1527 } |
|
1528 |
|
1529 /** |
|
1530 * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary |
|
1531 * @adapter: address of board private structure |
|
1532 * @start: address of beginning of memory |
|
1533 * @len: length of memory |
|
1534 **/ |
|
1535 static bool e1000_check_64k_bound(struct e1000_adapter *adapter, void *start, |
|
1536 unsigned long len) |
|
1537 { |
|
1538 struct e1000_hw *hw = &adapter->hw; |
|
1539 unsigned long begin = (unsigned long)start; |
|
1540 unsigned long end = begin + len; |
|
1541 |
|
1542 /* First rev 82545 and 82546 need to not allow any memory |
|
1543 * write location to cross 64k boundary due to errata 23 */ |
|
1544 if (hw->mac_type == e1000_82545 || |
|
1545 hw->mac_type == e1000_ce4100 || |
|
1546 hw->mac_type == e1000_82546) { |
|
1547 return ((begin ^ (end - 1)) >> 16) != 0 ? false : true; |
|
1548 } |
|
1549 |
|
1550 return true; |
|
1551 } |
|
1552 |
|
1553 /** |
|
1554 * e1000_setup_tx_resources - allocate Tx resources (Descriptors) |
|
1555 * @adapter: board private structure |
|
1556 * @txdr: tx descriptor ring (for a specific queue) to setup |
|
1557 * |
|
1558 * Return 0 on success, negative on failure |
|
1559 **/ |
|
1560 |
|
1561 static int e1000_setup_tx_resources(struct e1000_adapter *adapter, |
|
1562 struct e1000_tx_ring *txdr) |
|
1563 { |
|
1564 struct pci_dev *pdev = adapter->pdev; |
|
1565 int size; |
|
1566 |
|
1567 size = sizeof(struct e1000_buffer) * txdr->count; |
|
1568 txdr->buffer_info = vzalloc(size); |
|
1569 if (!txdr->buffer_info) { |
|
1570 e_err(probe, "Unable to allocate memory for the Tx descriptor " |
|
1571 "ring\n"); |
|
1572 return -ENOMEM; |
|
1573 } |
|
1574 |
|
1575 /* round up to nearest 4K */ |
|
1576 |
|
1577 txdr->size = txdr->count * sizeof(struct e1000_tx_desc); |
|
1578 txdr->size = ALIGN(txdr->size, 4096); |
|
1579 |
|
1580 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size, &txdr->dma, |
|
1581 GFP_KERNEL); |
|
1582 if (!txdr->desc) { |
|
1583 setup_tx_desc_die: |
|
1584 vfree(txdr->buffer_info); |
|
1585 e_err(probe, "Unable to allocate memory for the Tx descriptor " |
|
1586 "ring\n"); |
|
1587 return -ENOMEM; |
|
1588 } |
|
1589 |
|
1590 /* Fix for errata 23, can't cross 64kB boundary */ |
|
1591 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) { |
|
1592 void *olddesc = txdr->desc; |
|
1593 dma_addr_t olddma = txdr->dma; |
|
1594 e_err(tx_err, "txdr align check failed: %u bytes at %p\n", |
|
1595 txdr->size, txdr->desc); |
|
1596 /* Try again, without freeing the previous */ |
|
1597 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size, |
|
1598 &txdr->dma, GFP_KERNEL); |
|
1599 /* Failed allocation, critical failure */ |
|
1600 if (!txdr->desc) { |
|
1601 dma_free_coherent(&pdev->dev, txdr->size, olddesc, |
|
1602 olddma); |
|
1603 goto setup_tx_desc_die; |
|
1604 } |
|
1605 |
|
1606 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) { |
|
1607 /* give up */ |
|
1608 dma_free_coherent(&pdev->dev, txdr->size, txdr->desc, |
|
1609 txdr->dma); |
|
1610 dma_free_coherent(&pdev->dev, txdr->size, olddesc, |
|
1611 olddma); |
|
1612 e_err(probe, "Unable to allocate aligned memory " |
|
1613 "for the transmit descriptor ring\n"); |
|
1614 vfree(txdr->buffer_info); |
|
1615 return -ENOMEM; |
|
1616 } else { |
|
1617 /* Free old allocation, new allocation was successful */ |
|
1618 dma_free_coherent(&pdev->dev, txdr->size, olddesc, |
|
1619 olddma); |
|
1620 } |
|
1621 } |
|
1622 memset(txdr->desc, 0, txdr->size); |
|
1623 |
|
1624 txdr->next_to_use = 0; |
|
1625 txdr->next_to_clean = 0; |
|
1626 |
|
1627 return 0; |
|
1628 } |
|
1629 |
|
1630 /** |
|
1631 * e1000_setup_all_tx_resources - wrapper to allocate Tx resources |
|
1632 * (Descriptors) for all queues |
|
1633 * @adapter: board private structure |
|
1634 * |
|
1635 * Return 0 on success, negative on failure |
|
1636 **/ |
|
1637 |
|
1638 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter) |
|
1639 { |
|
1640 int i, err = 0; |
|
1641 |
|
1642 for (i = 0; i < adapter->num_tx_queues; i++) { |
|
1643 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]); |
|
1644 if (err) { |
|
1645 e_err(probe, "Allocation for Tx Queue %u failed\n", i); |
|
1646 for (i-- ; i >= 0; i--) |
|
1647 e1000_free_tx_resources(adapter, |
|
1648 &adapter->tx_ring[i]); |
|
1649 break; |
|
1650 } |
|
1651 } |
|
1652 |
|
1653 return err; |
|
1654 } |
|
1655 |
|
1656 /** |
|
1657 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset |
|
1658 * @adapter: board private structure |
|
1659 * |
|
1660 * Configure the Tx unit of the MAC after a reset. |
|
1661 **/ |
|
1662 |
|
1663 static void e1000_configure_tx(struct e1000_adapter *adapter) |
|
1664 { |
|
1665 u64 tdba; |
|
1666 struct e1000_hw *hw = &adapter->hw; |
|
1667 u32 tdlen, tctl, tipg; |
|
1668 u32 ipgr1, ipgr2; |
|
1669 |
|
1670 /* Setup the HW Tx Head and Tail descriptor pointers */ |
|
1671 |
|
1672 switch (adapter->num_tx_queues) { |
|
1673 case 1: |
|
1674 default: |
|
1675 tdba = adapter->tx_ring[0].dma; |
|
1676 tdlen = adapter->tx_ring[0].count * |
|
1677 sizeof(struct e1000_tx_desc); |
|
1678 ew32(TDLEN, tdlen); |
|
1679 ew32(TDBAH, (tdba >> 32)); |
|
1680 ew32(TDBAL, (tdba & 0x00000000ffffffffULL)); |
|
1681 ew32(TDT, 0); |
|
1682 ew32(TDH, 0); |
|
1683 adapter->tx_ring[0].tdh = ((hw->mac_type >= e1000_82543) ? E1000_TDH : E1000_82542_TDH); |
|
1684 adapter->tx_ring[0].tdt = ((hw->mac_type >= e1000_82543) ? E1000_TDT : E1000_82542_TDT); |
|
1685 break; |
|
1686 } |
|
1687 |
|
1688 /* Set the default values for the Tx Inter Packet Gap timer */ |
|
1689 if ((hw->media_type == e1000_media_type_fiber || |
|
1690 hw->media_type == e1000_media_type_internal_serdes)) |
|
1691 tipg = DEFAULT_82543_TIPG_IPGT_FIBER; |
|
1692 else |
|
1693 tipg = DEFAULT_82543_TIPG_IPGT_COPPER; |
|
1694 |
|
1695 switch (hw->mac_type) { |
|
1696 case e1000_82542_rev2_0: |
|
1697 case e1000_82542_rev2_1: |
|
1698 tipg = DEFAULT_82542_TIPG_IPGT; |
|
1699 ipgr1 = DEFAULT_82542_TIPG_IPGR1; |
|
1700 ipgr2 = DEFAULT_82542_TIPG_IPGR2; |
|
1701 break; |
|
1702 default: |
|
1703 ipgr1 = DEFAULT_82543_TIPG_IPGR1; |
|
1704 ipgr2 = DEFAULT_82543_TIPG_IPGR2; |
|
1705 break; |
|
1706 } |
|
1707 tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT; |
|
1708 tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT; |
|
1709 ew32(TIPG, tipg); |
|
1710 |
|
1711 /* Set the Tx Interrupt Delay register */ |
|
1712 |
|
1713 ew32(TIDV, adapter->tx_int_delay); |
|
1714 if (hw->mac_type >= e1000_82540) |
|
1715 ew32(TADV, adapter->tx_abs_int_delay); |
|
1716 |
|
1717 /* Program the Transmit Control Register */ |
|
1718 |
|
1719 tctl = er32(TCTL); |
|
1720 tctl &= ~E1000_TCTL_CT; |
|
1721 tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC | |
|
1722 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT); |
|
1723 |
|
1724 e1000_config_collision_dist(hw); |
|
1725 |
|
1726 /* Setup Transmit Descriptor Settings for eop descriptor */ |
|
1727 adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS; |
|
1728 |
|
1729 /* only set IDE if we are delaying interrupts using the timers */ |
|
1730 if (adapter->tx_int_delay) |
|
1731 adapter->txd_cmd |= E1000_TXD_CMD_IDE; |
|
1732 |
|
1733 if (hw->mac_type < e1000_82543) |
|
1734 adapter->txd_cmd |= E1000_TXD_CMD_RPS; |
|
1735 else |
|
1736 adapter->txd_cmd |= E1000_TXD_CMD_RS; |
|
1737 |
|
1738 /* Cache if we're 82544 running in PCI-X because we'll |
|
1739 * need this to apply a workaround later in the send path. */ |
|
1740 if (hw->mac_type == e1000_82544 && |
|
1741 hw->bus_type == e1000_bus_type_pcix) |
|
1742 adapter->pcix_82544 = true; |
|
1743 |
|
1744 ew32(TCTL, tctl); |
|
1745 |
|
1746 } |
|
1747 |
|
1748 /** |
|
1749 * e1000_setup_rx_resources - allocate Rx resources (Descriptors) |
|
1750 * @adapter: board private structure |
|
1751 * @rxdr: rx descriptor ring (for a specific queue) to setup |
|
1752 * |
|
1753 * Returns 0 on success, negative on failure |
|
1754 **/ |
|
1755 |
|
1756 static int e1000_setup_rx_resources(struct e1000_adapter *adapter, |
|
1757 struct e1000_rx_ring *rxdr) |
|
1758 { |
|
1759 struct pci_dev *pdev = adapter->pdev; |
|
1760 int size, desc_len; |
|
1761 |
|
1762 size = sizeof(struct e1000_buffer) * rxdr->count; |
|
1763 rxdr->buffer_info = vzalloc(size); |
|
1764 if (!rxdr->buffer_info) { |
|
1765 e_err(probe, "Unable to allocate memory for the Rx descriptor " |
|
1766 "ring\n"); |
|
1767 return -ENOMEM; |
|
1768 } |
|
1769 |
|
1770 desc_len = sizeof(struct e1000_rx_desc); |
|
1771 |
|
1772 /* Round up to nearest 4K */ |
|
1773 |
|
1774 rxdr->size = rxdr->count * desc_len; |
|
1775 rxdr->size = ALIGN(rxdr->size, 4096); |
|
1776 |
|
1777 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size, &rxdr->dma, |
|
1778 GFP_KERNEL); |
|
1779 |
|
1780 if (!rxdr->desc) { |
|
1781 e_err(probe, "Unable to allocate memory for the Rx descriptor " |
|
1782 "ring\n"); |
|
1783 setup_rx_desc_die: |
|
1784 vfree(rxdr->buffer_info); |
|
1785 return -ENOMEM; |
|
1786 } |
|
1787 |
|
1788 /* Fix for errata 23, can't cross 64kB boundary */ |
|
1789 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) { |
|
1790 void *olddesc = rxdr->desc; |
|
1791 dma_addr_t olddma = rxdr->dma; |
|
1792 e_err(rx_err, "rxdr align check failed: %u bytes at %p\n", |
|
1793 rxdr->size, rxdr->desc); |
|
1794 /* Try again, without freeing the previous */ |
|
1795 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size, |
|
1796 &rxdr->dma, GFP_KERNEL); |
|
1797 /* Failed allocation, critical failure */ |
|
1798 if (!rxdr->desc) { |
|
1799 dma_free_coherent(&pdev->dev, rxdr->size, olddesc, |
|
1800 olddma); |
|
1801 e_err(probe, "Unable to allocate memory for the Rx " |
|
1802 "descriptor ring\n"); |
|
1803 goto setup_rx_desc_die; |
|
1804 } |
|
1805 |
|
1806 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) { |
|
1807 /* give up */ |
|
1808 dma_free_coherent(&pdev->dev, rxdr->size, rxdr->desc, |
|
1809 rxdr->dma); |
|
1810 dma_free_coherent(&pdev->dev, rxdr->size, olddesc, |
|
1811 olddma); |
|
1812 e_err(probe, "Unable to allocate aligned memory for " |
|
1813 "the Rx descriptor ring\n"); |
|
1814 goto setup_rx_desc_die; |
|
1815 } else { |
|
1816 /* Free old allocation, new allocation was successful */ |
|
1817 dma_free_coherent(&pdev->dev, rxdr->size, olddesc, |
|
1818 olddma); |
|
1819 } |
|
1820 } |
|
1821 memset(rxdr->desc, 0, rxdr->size); |
|
1822 |
|
1823 rxdr->next_to_clean = 0; |
|
1824 rxdr->next_to_use = 0; |
|
1825 rxdr->rx_skb_top = NULL; |
|
1826 |
|
1827 return 0; |
|
1828 } |
|
1829 |
|
1830 /** |
|
1831 * e1000_setup_all_rx_resources - wrapper to allocate Rx resources |
|
1832 * (Descriptors) for all queues |
|
1833 * @adapter: board private structure |
|
1834 * |
|
1835 * Return 0 on success, negative on failure |
|
1836 **/ |
|
1837 |
|
1838 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter) |
|
1839 { |
|
1840 int i, err = 0; |
|
1841 |
|
1842 for (i = 0; i < adapter->num_rx_queues; i++) { |
|
1843 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]); |
|
1844 if (err) { |
|
1845 e_err(probe, "Allocation for Rx Queue %u failed\n", i); |
|
1846 for (i-- ; i >= 0; i--) |
|
1847 e1000_free_rx_resources(adapter, |
|
1848 &adapter->rx_ring[i]); |
|
1849 break; |
|
1850 } |
|
1851 } |
|
1852 |
|
1853 return err; |
|
1854 } |
|
1855 |
|
1856 /** |
|
1857 * e1000_setup_rctl - configure the receive control registers |
|
1858 * @adapter: Board private structure |
|
1859 **/ |
|
1860 static void e1000_setup_rctl(struct e1000_adapter *adapter) |
|
1861 { |
|
1862 struct e1000_hw *hw = &adapter->hw; |
|
1863 u32 rctl; |
|
1864 |
|
1865 rctl = er32(RCTL); |
|
1866 |
|
1867 rctl &= ~(3 << E1000_RCTL_MO_SHIFT); |
|
1868 |
|
1869 rctl |= E1000_RCTL_BAM | E1000_RCTL_LBM_NO | |
|
1870 E1000_RCTL_RDMTS_HALF | |
|
1871 (hw->mc_filter_type << E1000_RCTL_MO_SHIFT); |
|
1872 |
|
1873 if (hw->tbi_compatibility_on == 1) |
|
1874 rctl |= E1000_RCTL_SBP; |
|
1875 else |
|
1876 rctl &= ~E1000_RCTL_SBP; |
|
1877 |
|
1878 if (adapter->netdev->mtu <= ETH_DATA_LEN) |
|
1879 rctl &= ~E1000_RCTL_LPE; |
|
1880 else |
|
1881 rctl |= E1000_RCTL_LPE; |
|
1882 |
|
1883 /* Setup buffer sizes */ |
|
1884 rctl &= ~E1000_RCTL_SZ_4096; |
|
1885 rctl |= E1000_RCTL_BSEX; |
|
1886 switch (adapter->rx_buffer_len) { |
|
1887 case E1000_RXBUFFER_2048: |
|
1888 default: |
|
1889 rctl |= E1000_RCTL_SZ_2048; |
|
1890 rctl &= ~E1000_RCTL_BSEX; |
|
1891 break; |
|
1892 case E1000_RXBUFFER_4096: |
|
1893 rctl |= E1000_RCTL_SZ_4096; |
|
1894 break; |
|
1895 case E1000_RXBUFFER_8192: |
|
1896 rctl |= E1000_RCTL_SZ_8192; |
|
1897 break; |
|
1898 case E1000_RXBUFFER_16384: |
|
1899 rctl |= E1000_RCTL_SZ_16384; |
|
1900 break; |
|
1901 } |
|
1902 |
|
1903 ew32(RCTL, rctl); |
|
1904 } |
|
1905 |
|
1906 /** |
|
1907 * e1000_configure_rx - Configure 8254x Receive Unit after Reset |
|
1908 * @adapter: board private structure |
|
1909 * |
|
1910 * Configure the Rx unit of the MAC after a reset. |
|
1911 **/ |
|
1912 |
|
1913 static void e1000_configure_rx(struct e1000_adapter *adapter) |
|
1914 { |
|
1915 u64 rdba; |
|
1916 struct e1000_hw *hw = &adapter->hw; |
|
1917 u32 rdlen, rctl, rxcsum; |
|
1918 |
|
1919 if (adapter->netdev->mtu > ETH_DATA_LEN) { |
|
1920 rdlen = adapter->rx_ring[0].count * |
|
1921 sizeof(struct e1000_rx_desc); |
|
1922 adapter->clean_rx = e1000_clean_jumbo_rx_irq; |
|
1923 adapter->alloc_rx_buf = e1000_alloc_jumbo_rx_buffers; |
|
1924 } else { |
|
1925 rdlen = adapter->rx_ring[0].count * |
|
1926 sizeof(struct e1000_rx_desc); |
|
1927 adapter->clean_rx = e1000_clean_rx_irq; |
|
1928 adapter->alloc_rx_buf = e1000_alloc_rx_buffers; |
|
1929 } |
|
1930 |
|
1931 /* disable receives while setting up the descriptors */ |
|
1932 rctl = er32(RCTL); |
|
1933 ew32(RCTL, rctl & ~E1000_RCTL_EN); |
|
1934 |
|
1935 /* set the Receive Delay Timer Register */ |
|
1936 ew32(RDTR, adapter->rx_int_delay); |
|
1937 |
|
1938 if (hw->mac_type >= e1000_82540) { |
|
1939 ew32(RADV, adapter->rx_abs_int_delay); |
|
1940 if (adapter->itr_setting != 0) |
|
1941 ew32(ITR, 1000000000 / (adapter->itr * 256)); |
|
1942 } |
|
1943 |
|
1944 /* Setup the HW Rx Head and Tail Descriptor Pointers and |
|
1945 * the Base and Length of the Rx Descriptor Ring */ |
|
1946 switch (adapter->num_rx_queues) { |
|
1947 case 1: |
|
1948 default: |
|
1949 rdba = adapter->rx_ring[0].dma; |
|
1950 ew32(RDLEN, rdlen); |
|
1951 ew32(RDBAH, (rdba >> 32)); |
|
1952 ew32(RDBAL, (rdba & 0x00000000ffffffffULL)); |
|
1953 ew32(RDT, 0); |
|
1954 ew32(RDH, 0); |
|
1955 adapter->rx_ring[0].rdh = ((hw->mac_type >= e1000_82543) ? E1000_RDH : E1000_82542_RDH); |
|
1956 adapter->rx_ring[0].rdt = ((hw->mac_type >= e1000_82543) ? E1000_RDT : E1000_82542_RDT); |
|
1957 break; |
|
1958 } |
|
1959 |
|
1960 /* Enable 82543 Receive Checksum Offload for TCP and UDP */ |
|
1961 if (hw->mac_type >= e1000_82543) { |
|
1962 rxcsum = er32(RXCSUM); |
|
1963 if (adapter->rx_csum) |
|
1964 rxcsum |= E1000_RXCSUM_TUOFL; |
|
1965 else |
|
1966 /* don't need to clear IPPCSE as it defaults to 0 */ |
|
1967 rxcsum &= ~E1000_RXCSUM_TUOFL; |
|
1968 ew32(RXCSUM, rxcsum); |
|
1969 } |
|
1970 |
|
1971 /* Enable Receives */ |
|
1972 ew32(RCTL, rctl | E1000_RCTL_EN); |
|
1973 } |
|
1974 |
|
1975 /** |
|
1976 * e1000_free_tx_resources - Free Tx Resources per Queue |
|
1977 * @adapter: board private structure |
|
1978 * @tx_ring: Tx descriptor ring for a specific queue |
|
1979 * |
|
1980 * Free all transmit software resources |
|
1981 **/ |
|
1982 |
|
1983 static void e1000_free_tx_resources(struct e1000_adapter *adapter, |
|
1984 struct e1000_tx_ring *tx_ring) |
|
1985 { |
|
1986 struct pci_dev *pdev = adapter->pdev; |
|
1987 |
|
1988 e1000_clean_tx_ring(adapter, tx_ring); |
|
1989 |
|
1990 vfree(tx_ring->buffer_info); |
|
1991 tx_ring->buffer_info = NULL; |
|
1992 |
|
1993 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc, |
|
1994 tx_ring->dma); |
|
1995 |
|
1996 tx_ring->desc = NULL; |
|
1997 } |
|
1998 |
|
1999 /** |
|
2000 * e1000_free_all_tx_resources - Free Tx Resources for All Queues |
|
2001 * @adapter: board private structure |
|
2002 * |
|
2003 * Free all transmit software resources |
|
2004 **/ |
|
2005 |
|
2006 void e1000_free_all_tx_resources(struct e1000_adapter *adapter) |
|
2007 { |
|
2008 int i; |
|
2009 |
|
2010 for (i = 0; i < adapter->num_tx_queues; i++) |
|
2011 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]); |
|
2012 } |
|
2013 |
|
2014 static void e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter, |
|
2015 struct e1000_buffer *buffer_info) |
|
2016 { |
|
2017 if (adapter->ecdev) { |
|
2018 return; |
|
2019 } |
|
2020 |
|
2021 if (buffer_info->dma) { |
|
2022 if (buffer_info->mapped_as_page) |
|
2023 dma_unmap_page(&adapter->pdev->dev, buffer_info->dma, |
|
2024 buffer_info->length, DMA_TO_DEVICE); |
|
2025 else |
|
2026 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma, |
|
2027 buffer_info->length, |
|
2028 DMA_TO_DEVICE); |
|
2029 buffer_info->dma = 0; |
|
2030 } |
|
2031 if (buffer_info->skb) { |
|
2032 dev_kfree_skb_any(buffer_info->skb); |
|
2033 buffer_info->skb = NULL; |
|
2034 } |
|
2035 buffer_info->time_stamp = 0; |
|
2036 /* buffer_info must be completely set up in the transmit path */ |
|
2037 } |
|
2038 |
|
2039 /** |
|
2040 * e1000_clean_tx_ring - Free Tx Buffers |
|
2041 * @adapter: board private structure |
|
2042 * @tx_ring: ring to be cleaned |
|
2043 **/ |
|
2044 |
|
2045 static void e1000_clean_tx_ring(struct e1000_adapter *adapter, |
|
2046 struct e1000_tx_ring *tx_ring) |
|
2047 { |
|
2048 struct e1000_hw *hw = &adapter->hw; |
|
2049 struct e1000_buffer *buffer_info; |
|
2050 unsigned long size; |
|
2051 unsigned int i; |
|
2052 |
|
2053 /* Free all the Tx ring sk_buffs */ |
|
2054 |
|
2055 for (i = 0; i < tx_ring->count; i++) { |
|
2056 buffer_info = &tx_ring->buffer_info[i]; |
|
2057 e1000_unmap_and_free_tx_resource(adapter, buffer_info); |
|
2058 } |
|
2059 |
|
2060 size = sizeof(struct e1000_buffer) * tx_ring->count; |
|
2061 memset(tx_ring->buffer_info, 0, size); |
|
2062 |
|
2063 /* Zero out the descriptor ring */ |
|
2064 |
|
2065 memset(tx_ring->desc, 0, tx_ring->size); |
|
2066 |
|
2067 tx_ring->next_to_use = 0; |
|
2068 tx_ring->next_to_clean = 0; |
|
2069 tx_ring->last_tx_tso = false; |
|
2070 |
|
2071 writel(0, hw->hw_addr + tx_ring->tdh); |
|
2072 writel(0, hw->hw_addr + tx_ring->tdt); |
|
2073 } |
|
2074 |
|
2075 /** |
|
2076 * e1000_clean_all_tx_rings - Free Tx Buffers for all queues |
|
2077 * @adapter: board private structure |
|
2078 **/ |
|
2079 |
|
2080 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter) |
|
2081 { |
|
2082 int i; |
|
2083 |
|
2084 for (i = 0; i < adapter->num_tx_queues; i++) |
|
2085 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]); |
|
2086 } |
|
2087 |
|
2088 /** |
|
2089 * e1000_free_rx_resources - Free Rx Resources |
|
2090 * @adapter: board private structure |
|
2091 * @rx_ring: ring to clean the resources from |
|
2092 * |
|
2093 * Free all receive software resources |
|
2094 **/ |
|
2095 |
|
2096 static void e1000_free_rx_resources(struct e1000_adapter *adapter, |
|
2097 struct e1000_rx_ring *rx_ring) |
|
2098 { |
|
2099 struct pci_dev *pdev = adapter->pdev; |
|
2100 |
|
2101 e1000_clean_rx_ring(adapter, rx_ring); |
|
2102 |
|
2103 vfree(rx_ring->buffer_info); |
|
2104 rx_ring->buffer_info = NULL; |
|
2105 |
|
2106 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc, |
|
2107 rx_ring->dma); |
|
2108 |
|
2109 rx_ring->desc = NULL; |
|
2110 } |
|
2111 |
|
2112 /** |
|
2113 * e1000_free_all_rx_resources - Free Rx Resources for All Queues |
|
2114 * @adapter: board private structure |
|
2115 * |
|
2116 * Free all receive software resources |
|
2117 **/ |
|
2118 |
|
2119 void e1000_free_all_rx_resources(struct e1000_adapter *adapter) |
|
2120 { |
|
2121 int i; |
|
2122 |
|
2123 for (i = 0; i < adapter->num_rx_queues; i++) |
|
2124 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]); |
|
2125 } |
|
2126 |
|
2127 /** |
|
2128 * e1000_clean_rx_ring - Free Rx Buffers per Queue |
|
2129 * @adapter: board private structure |
|
2130 * @rx_ring: ring to free buffers from |
|
2131 **/ |
|
2132 |
|
2133 static void e1000_clean_rx_ring(struct e1000_adapter *adapter, |
|
2134 struct e1000_rx_ring *rx_ring) |
|
2135 { |
|
2136 struct e1000_hw *hw = &adapter->hw; |
|
2137 struct e1000_buffer *buffer_info; |
|
2138 struct pci_dev *pdev = adapter->pdev; |
|
2139 unsigned long size; |
|
2140 unsigned int i; |
|
2141 |
|
2142 /* Free all the Rx ring sk_buffs */ |
|
2143 for (i = 0; i < rx_ring->count; i++) { |
|
2144 buffer_info = &rx_ring->buffer_info[i]; |
|
2145 if (buffer_info->dma && |
|
2146 adapter->clean_rx == e1000_clean_rx_irq) { |
|
2147 dma_unmap_single(&pdev->dev, buffer_info->dma, |
|
2148 buffer_info->length, |
|
2149 DMA_FROM_DEVICE); |
|
2150 } else if (buffer_info->dma && |
|
2151 adapter->clean_rx == e1000_clean_jumbo_rx_irq) { |
|
2152 dma_unmap_page(&pdev->dev, buffer_info->dma, |
|
2153 buffer_info->length, |
|
2154 DMA_FROM_DEVICE); |
|
2155 } |
|
2156 |
|
2157 buffer_info->dma = 0; |
|
2158 if (buffer_info->page) { |
|
2159 put_page(buffer_info->page); |
|
2160 buffer_info->page = NULL; |
|
2161 } |
|
2162 if (buffer_info->skb) { |
|
2163 dev_kfree_skb(buffer_info->skb); |
|
2164 buffer_info->skb = NULL; |
|
2165 } |
|
2166 } |
|
2167 |
|
2168 /* there also may be some cached data from a chained receive */ |
|
2169 if (rx_ring->rx_skb_top) { |
|
2170 dev_kfree_skb(rx_ring->rx_skb_top); |
|
2171 rx_ring->rx_skb_top = NULL; |
|
2172 } |
|
2173 |
|
2174 size = sizeof(struct e1000_buffer) * rx_ring->count; |
|
2175 memset(rx_ring->buffer_info, 0, size); |
|
2176 |
|
2177 /* Zero out the descriptor ring */ |
|
2178 memset(rx_ring->desc, 0, rx_ring->size); |
|
2179 |
|
2180 rx_ring->next_to_clean = 0; |
|
2181 rx_ring->next_to_use = 0; |
|
2182 |
|
2183 writel(0, hw->hw_addr + rx_ring->rdh); |
|
2184 writel(0, hw->hw_addr + rx_ring->rdt); |
|
2185 } |
|
2186 |
|
2187 /** |
|
2188 * e1000_clean_all_rx_rings - Free Rx Buffers for all queues |
|
2189 * @adapter: board private structure |
|
2190 **/ |
|
2191 |
|
2192 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter) |
|
2193 { |
|
2194 int i; |
|
2195 |
|
2196 for (i = 0; i < adapter->num_rx_queues; i++) |
|
2197 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]); |
|
2198 } |
|
2199 |
|
2200 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset |
|
2201 * and memory write and invalidate disabled for certain operations |
|
2202 */ |
|
2203 static void e1000_enter_82542_rst(struct e1000_adapter *adapter) |
|
2204 { |
|
2205 struct e1000_hw *hw = &adapter->hw; |
|
2206 struct net_device *netdev = adapter->netdev; |
|
2207 u32 rctl; |
|
2208 |
|
2209 e1000_pci_clear_mwi(hw); |
|
2210 |
|
2211 rctl = er32(RCTL); |
|
2212 rctl |= E1000_RCTL_RST; |
|
2213 ew32(RCTL, rctl); |
|
2214 E1000_WRITE_FLUSH(); |
|
2215 mdelay(5); |
|
2216 |
|
2217 if (!adapter->ecdev && netif_running(netdev)) |
|
2218 e1000_clean_all_rx_rings(adapter); |
|
2219 } |
|
2220 |
|
2221 static void e1000_leave_82542_rst(struct e1000_adapter *adapter) |
|
2222 { |
|
2223 struct e1000_hw *hw = &adapter->hw; |
|
2224 struct net_device *netdev = adapter->netdev; |
|
2225 u32 rctl; |
|
2226 |
|
2227 rctl = er32(RCTL); |
|
2228 rctl &= ~E1000_RCTL_RST; |
|
2229 ew32(RCTL, rctl); |
|
2230 E1000_WRITE_FLUSH(); |
|
2231 mdelay(5); |
|
2232 |
|
2233 if (hw->pci_cmd_word & PCI_COMMAND_INVALIDATE) |
|
2234 e1000_pci_set_mwi(hw); |
|
2235 |
|
2236 if (!adapter->netdev && netif_running(netdev)) { |
|
2237 /* No need to loop, because 82542 supports only 1 queue */ |
|
2238 struct e1000_rx_ring *ring = &adapter->rx_ring[0]; |
|
2239 e1000_configure_rx(adapter); |
|
2240 if (adapter->ecdev) { |
|
2241 /* fill rx ring completely! */ |
|
2242 adapter->alloc_rx_buf(adapter, ring, ring->count); |
|
2243 } else { |
|
2244 /* this one leaves the last ring element unallocated! */ |
|
2245 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring)); |
|
2246 } |
|
2247 |
|
2248 } |
|
2249 } |
|
2250 |
|
2251 /** |
|
2252 * e1000_set_mac - Change the Ethernet Address of the NIC |
|
2253 * @netdev: network interface device structure |
|
2254 * @p: pointer to an address structure |
|
2255 * |
|
2256 * Returns 0 on success, negative on failure |
|
2257 **/ |
|
2258 |
|
2259 static int e1000_set_mac(struct net_device *netdev, void *p) |
|
2260 { |
|
2261 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
2262 struct e1000_hw *hw = &adapter->hw; |
|
2263 struct sockaddr *addr = p; |
|
2264 |
|
2265 if (!is_valid_ether_addr(addr->sa_data)) |
|
2266 return -EADDRNOTAVAIL; |
|
2267 |
|
2268 /* 82542 2.0 needs to be in reset to write receive address registers */ |
|
2269 |
|
2270 if (hw->mac_type == e1000_82542_rev2_0) |
|
2271 e1000_enter_82542_rst(adapter); |
|
2272 |
|
2273 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); |
|
2274 memcpy(hw->mac_addr, addr->sa_data, netdev->addr_len); |
|
2275 |
|
2276 e1000_rar_set(hw, hw->mac_addr, 0); |
|
2277 |
|
2278 if (hw->mac_type == e1000_82542_rev2_0) |
|
2279 e1000_leave_82542_rst(adapter); |
|
2280 |
|
2281 return 0; |
|
2282 } |
|
2283 |
|
2284 /** |
|
2285 * e1000_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set |
|
2286 * @netdev: network interface device structure |
|
2287 * |
|
2288 * The set_rx_mode entry point is called whenever the unicast or multicast |
|
2289 * address lists or the network interface flags are updated. This routine is |
|
2290 * responsible for configuring the hardware for proper unicast, multicast, |
|
2291 * promiscuous mode, and all-multi behavior. |
|
2292 **/ |
|
2293 |
|
2294 static void e1000_set_rx_mode(struct net_device *netdev) |
|
2295 { |
|
2296 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
2297 struct e1000_hw *hw = &adapter->hw; |
|
2298 struct netdev_hw_addr *ha; |
|
2299 bool use_uc = false; |
|
2300 u32 rctl; |
|
2301 u32 hash_value; |
|
2302 int i, rar_entries = E1000_RAR_ENTRIES; |
|
2303 int mta_reg_count = E1000_NUM_MTA_REGISTERS; |
|
2304 u32 *mcarray = kcalloc(mta_reg_count, sizeof(u32), GFP_ATOMIC); |
|
2305 |
|
2306 if (!mcarray) { |
|
2307 e_err(probe, "memory allocation failed\n"); |
|
2308 return; |
|
2309 } |
|
2310 |
|
2311 /* Check for Promiscuous and All Multicast modes */ |
|
2312 |
|
2313 rctl = er32(RCTL); |
|
2314 |
|
2315 if (netdev->flags & IFF_PROMISC) { |
|
2316 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE); |
|
2317 rctl &= ~E1000_RCTL_VFE; |
|
2318 } else { |
|
2319 if (netdev->flags & IFF_ALLMULTI) |
|
2320 rctl |= E1000_RCTL_MPE; |
|
2321 else |
|
2322 rctl &= ~E1000_RCTL_MPE; |
|
2323 /* Enable VLAN filter if there is a VLAN */ |
|
2324 if (e1000_vlan_used(adapter)) |
|
2325 rctl |= E1000_RCTL_VFE; |
|
2326 } |
|
2327 |
|
2328 if (netdev_uc_count(netdev) > rar_entries - 1) { |
|
2329 rctl |= E1000_RCTL_UPE; |
|
2330 } else if (!(netdev->flags & IFF_PROMISC)) { |
|
2331 rctl &= ~E1000_RCTL_UPE; |
|
2332 use_uc = true; |
|
2333 } |
|
2334 |
|
2335 ew32(RCTL, rctl); |
|
2336 |
|
2337 /* 82542 2.0 needs to be in reset to write receive address registers */ |
|
2338 |
|
2339 if (hw->mac_type == e1000_82542_rev2_0) |
|
2340 e1000_enter_82542_rst(adapter); |
|
2341 |
|
2342 /* load the first 14 addresses into the exact filters 1-14. Unicast |
|
2343 * addresses take precedence to avoid disabling unicast filtering |
|
2344 * when possible. |
|
2345 * |
|
2346 * RAR 0 is used for the station MAC address |
|
2347 * if there are not 14 addresses, go ahead and clear the filters |
|
2348 */ |
|
2349 i = 1; |
|
2350 if (use_uc) |
|
2351 netdev_for_each_uc_addr(ha, netdev) { |
|
2352 if (i == rar_entries) |
|
2353 break; |
|
2354 e1000_rar_set(hw, ha->addr, i++); |
|
2355 } |
|
2356 |
|
2357 netdev_for_each_mc_addr(ha, netdev) { |
|
2358 if (i == rar_entries) { |
|
2359 /* load any remaining addresses into the hash table */ |
|
2360 u32 hash_reg, hash_bit, mta; |
|
2361 hash_value = e1000_hash_mc_addr(hw, ha->addr); |
|
2362 hash_reg = (hash_value >> 5) & 0x7F; |
|
2363 hash_bit = hash_value & 0x1F; |
|
2364 mta = (1 << hash_bit); |
|
2365 mcarray[hash_reg] |= mta; |
|
2366 } else { |
|
2367 e1000_rar_set(hw, ha->addr, i++); |
|
2368 } |
|
2369 } |
|
2370 |
|
2371 for (; i < rar_entries; i++) { |
|
2372 E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0); |
|
2373 E1000_WRITE_FLUSH(); |
|
2374 E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0); |
|
2375 E1000_WRITE_FLUSH(); |
|
2376 } |
|
2377 |
|
2378 /* write the hash table completely, write from bottom to avoid |
|
2379 * both stupid write combining chipsets, and flushing each write */ |
|
2380 for (i = mta_reg_count - 1; i >= 0 ; i--) { |
|
2381 /* |
|
2382 * If we are on an 82544 has an errata where writing odd |
|
2383 * offsets overwrites the previous even offset, but writing |
|
2384 * backwards over the range solves the issue by always |
|
2385 * writing the odd offset first |
|
2386 */ |
|
2387 E1000_WRITE_REG_ARRAY(hw, MTA, i, mcarray[i]); |
|
2388 } |
|
2389 E1000_WRITE_FLUSH(); |
|
2390 |
|
2391 if (hw->mac_type == e1000_82542_rev2_0) |
|
2392 e1000_leave_82542_rst(adapter); |
|
2393 |
|
2394 kfree(mcarray); |
|
2395 } |
|
2396 |
|
2397 /** |
|
2398 * e1000_update_phy_info_task - get phy info |
|
2399 * @work: work struct contained inside adapter struct |
|
2400 * |
|
2401 * Need to wait a few seconds after link up to get diagnostic information from |
|
2402 * the phy |
|
2403 */ |
|
2404 static void e1000_update_phy_info_task(struct work_struct *work) |
|
2405 { |
|
2406 struct e1000_adapter *adapter = container_of(work, |
|
2407 struct e1000_adapter, |
|
2408 phy_info_task.work); |
|
2409 if (test_bit(__E1000_DOWN, &adapter->flags)) |
|
2410 return; |
|
2411 mutex_lock(&adapter->mutex); |
|
2412 e1000_phy_get_info(&adapter->hw, &adapter->phy_info); |
|
2413 mutex_unlock(&adapter->mutex); |
|
2414 } |
|
2415 |
|
2416 /** |
|
2417 * e1000_82547_tx_fifo_stall_task - task to complete work |
|
2418 * @work: work struct contained inside adapter struct |
|
2419 **/ |
|
2420 static void e1000_82547_tx_fifo_stall_task(struct work_struct *work) |
|
2421 { |
|
2422 struct e1000_adapter *adapter = container_of(work, |
|
2423 struct e1000_adapter, |
|
2424 fifo_stall_task.work); |
|
2425 struct e1000_hw *hw = &adapter->hw; |
|
2426 struct net_device *netdev = adapter->netdev; |
|
2427 u32 tctl; |
|
2428 |
|
2429 if (test_bit(__E1000_DOWN, &adapter->flags)) |
|
2430 return; |
|
2431 mutex_lock(&adapter->mutex); |
|
2432 if (atomic_read(&adapter->tx_fifo_stall)) { |
|
2433 if ((er32(TDT) == er32(TDH)) && |
|
2434 (er32(TDFT) == er32(TDFH)) && |
|
2435 (er32(TDFTS) == er32(TDFHS))) { |
|
2436 tctl = er32(TCTL); |
|
2437 ew32(TCTL, tctl & ~E1000_TCTL_EN); |
|
2438 ew32(TDFT, adapter->tx_head_addr); |
|
2439 ew32(TDFH, adapter->tx_head_addr); |
|
2440 ew32(TDFTS, adapter->tx_head_addr); |
|
2441 ew32(TDFHS, adapter->tx_head_addr); |
|
2442 ew32(TCTL, tctl); |
|
2443 E1000_WRITE_FLUSH(); |
|
2444 |
|
2445 adapter->tx_fifo_head = 0; |
|
2446 atomic_set(&adapter->tx_fifo_stall, 0); |
|
2447 netif_wake_queue(netdev); |
|
2448 } else if (!test_bit(__E1000_DOWN, &adapter->flags)) { |
|
2449 schedule_delayed_work(&adapter->fifo_stall_task, 1); |
|
2450 } |
|
2451 } |
|
2452 mutex_unlock(&adapter->mutex); |
|
2453 } |
|
2454 |
|
2455 bool e1000_has_link(struct e1000_adapter *adapter) |
|
2456 { |
|
2457 struct e1000_hw *hw = &adapter->hw; |
|
2458 bool link_active = false; |
|
2459 |
|
2460 /* get_link_status is set on LSC (link status) interrupt or rx |
|
2461 * sequence error interrupt (except on intel ce4100). |
|
2462 * get_link_status will stay false until the |
|
2463 * e1000_check_for_link establishes link for copper adapters |
|
2464 * ONLY |
|
2465 */ |
|
2466 switch (hw->media_type) { |
|
2467 case e1000_media_type_copper: |
|
2468 if (hw->mac_type == e1000_ce4100) |
|
2469 hw->get_link_status = 1; |
|
2470 if (hw->get_link_status) { |
|
2471 e1000_check_for_link(hw); |
|
2472 link_active = !hw->get_link_status; |
|
2473 } else { |
|
2474 link_active = true; |
|
2475 } |
|
2476 break; |
|
2477 case e1000_media_type_fiber: |
|
2478 e1000_check_for_link(hw); |
|
2479 link_active = !!(er32(STATUS) & E1000_STATUS_LU); |
|
2480 break; |
|
2481 case e1000_media_type_internal_serdes: |
|
2482 e1000_check_for_link(hw); |
|
2483 link_active = hw->serdes_has_link; |
|
2484 break; |
|
2485 default: |
|
2486 break; |
|
2487 } |
|
2488 |
|
2489 return link_active; |
|
2490 } |
|
2491 |
|
2492 /** |
|
2493 * e1000_watchdog - work function |
|
2494 * @work: work struct contained inside adapter struct |
|
2495 **/ |
|
2496 static void e1000_watchdog(struct work_struct *work) |
|
2497 { |
|
2498 struct e1000_adapter *adapter = container_of(work, |
|
2499 struct e1000_adapter, |
|
2500 watchdog_task.work); |
|
2501 struct e1000_hw *hw = &adapter->hw; |
|
2502 struct net_device *netdev = adapter->netdev; |
|
2503 struct e1000_tx_ring *txdr = adapter->tx_ring; |
|
2504 u32 link, tctl; |
|
2505 |
|
2506 if (test_bit(__E1000_DOWN, &adapter->flags)) |
|
2507 return; |
|
2508 |
|
2509 mutex_lock(&adapter->mutex); |
|
2510 link = e1000_has_link(adapter); |
|
2511 if (!adapter->ecdev && (netif_carrier_ok(netdev)) && link) |
|
2512 goto link_up; |
|
2513 |
|
2514 if (link) { |
|
2515 if ((adapter->ecdev && !ecdev_get_link(adapter->ecdev)) |
|
2516 || (!adapter->ecdev && !netif_carrier_ok(netdev))) { |
|
2517 u32 ctrl; |
|
2518 bool txb2b __attribute__ ((unused)) = true; |
|
2519 /* update snapshot of PHY registers on LSC */ |
|
2520 e1000_get_speed_and_duplex(hw, |
|
2521 &adapter->link_speed, |
|
2522 &adapter->link_duplex); |
|
2523 |
|
2524 ctrl = er32(CTRL); |
|
2525 pr_info("%s NIC Link is Up %d Mbps %s, " |
|
2526 "Flow Control: %s\n", |
|
2527 netdev->name, |
|
2528 adapter->link_speed, |
|
2529 adapter->link_duplex == FULL_DUPLEX ? |
|
2530 "Full Duplex" : "Half Duplex", |
|
2531 ((ctrl & E1000_CTRL_TFCE) && (ctrl & |
|
2532 E1000_CTRL_RFCE)) ? "RX/TX" : ((ctrl & |
|
2533 E1000_CTRL_RFCE) ? "RX" : ((ctrl & |
|
2534 E1000_CTRL_TFCE) ? "TX" : "None"))); |
|
2535 |
|
2536 /* adjust timeout factor according to speed/duplex */ |
|
2537 adapter->tx_timeout_factor = 1; |
|
2538 switch (adapter->link_speed) { |
|
2539 case SPEED_10: |
|
2540 txb2b = false; |
|
2541 adapter->tx_timeout_factor = 16; |
|
2542 break; |
|
2543 case SPEED_100: |
|
2544 txb2b = false; |
|
2545 /* maybe add some timeout factor ? */ |
|
2546 break; |
|
2547 } |
|
2548 |
|
2549 /* enable transmits in the hardware */ |
|
2550 tctl = er32(TCTL); |
|
2551 tctl |= E1000_TCTL_EN; |
|
2552 ew32(TCTL, tctl); |
|
2553 |
|
2554 if (adapter->ecdev) { |
|
2555 ecdev_set_link(adapter->ecdev, 1); |
|
2556 } |
|
2557 else { |
|
2558 netif_carrier_on(netdev); |
|
2559 if (!test_bit(__E1000_DOWN, &adapter->flags)) |
|
2560 schedule_delayed_work(&adapter->phy_info_task, |
|
2561 2 * HZ); |
|
2562 } |
|
2563 adapter->smartspeed = 0; |
|
2564 } |
|
2565 } else { |
|
2566 if ((adapter->ecdev && ecdev_get_link(adapter->ecdev)) |
|
2567 || (!adapter->ecdev && netif_carrier_ok(netdev))) { |
|
2568 adapter->link_speed = 0; |
|
2569 adapter->link_duplex = 0; |
|
2570 pr_info("%s NIC Link is Down\n", |
|
2571 netdev->name); |
|
2572 |
|
2573 if (adapter->ecdev) { |
|
2574 ecdev_set_link(adapter->ecdev, 0); |
|
2575 } else { |
|
2576 netif_carrier_off(netdev); |
|
2577 |
|
2578 if (!test_bit(__E1000_DOWN, &adapter->flags)) |
|
2579 schedule_delayed_work(&adapter->phy_info_task, |
|
2580 2 * HZ); |
|
2581 } |
|
2582 } |
|
2583 |
|
2584 e1000_smartspeed(adapter); |
|
2585 } |
|
2586 |
|
2587 link_up: |
|
2588 e1000_update_stats(adapter); |
|
2589 |
|
2590 hw->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old; |
|
2591 adapter->tpt_old = adapter->stats.tpt; |
|
2592 hw->collision_delta = adapter->stats.colc - adapter->colc_old; |
|
2593 adapter->colc_old = adapter->stats.colc; |
|
2594 |
|
2595 adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old; |
|
2596 adapter->gorcl_old = adapter->stats.gorcl; |
|
2597 adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old; |
|
2598 adapter->gotcl_old = adapter->stats.gotcl; |
|
2599 |
|
2600 e1000_update_adaptive(hw); |
|
2601 |
|
2602 if (!adapter->ecdev && !netif_carrier_ok(netdev)) { |
|
2603 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) { |
|
2604 /* We've lost link, so the controller stops DMA, |
|
2605 * but we've got queued Tx work that's never going |
|
2606 * to get done, so reset controller to flush Tx. |
|
2607 * (Do the reset outside of interrupt context). */ |
|
2608 adapter->tx_timeout_count++; |
|
2609 schedule_work(&adapter->reset_task); |
|
2610 /* exit immediately since reset is imminent */ |
|
2611 goto unlock; |
|
2612 } |
|
2613 } |
|
2614 |
|
2615 /* Simple mode for Interrupt Throttle Rate (ITR) */ |
|
2616 if (hw->mac_type >= e1000_82540 && adapter->itr_setting == 4) { |
|
2617 /* |
|
2618 * Symmetric Tx/Rx gets a reduced ITR=2000; |
|
2619 * Total asymmetrical Tx or Rx gets ITR=8000; |
|
2620 * everyone else is between 2000-8000. |
|
2621 */ |
|
2622 u32 goc = (adapter->gotcl + adapter->gorcl) / 10000; |
|
2623 u32 dif = (adapter->gotcl > adapter->gorcl ? |
|
2624 adapter->gotcl - adapter->gorcl : |
|
2625 adapter->gorcl - adapter->gotcl) / 10000; |
|
2626 u32 itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000; |
|
2627 |
|
2628 ew32(ITR, 1000000000 / (itr * 256)); |
|
2629 } |
|
2630 |
|
2631 /* Cause software interrupt to ensure rx ring is cleaned */ |
|
2632 ew32(ICS, E1000_ICS_RXDMT0); |
|
2633 |
|
2634 /* Force detection of hung controller every watchdog period */ |
|
2635 adapter->detect_tx_hung = true; |
|
2636 |
|
2637 /* Reschedule the task */ |
|
2638 if (!adapter->ecdev && !test_bit(__E1000_DOWN, &adapter->flags)) |
|
2639 schedule_delayed_work(&adapter->watchdog_task, 2 * HZ); |
|
2640 |
|
2641 unlock: |
|
2642 mutex_unlock(&adapter->mutex); |
|
2643 } |
|
2644 |
|
2645 enum latency_range { |
|
2646 lowest_latency = 0, |
|
2647 low_latency = 1, |
|
2648 bulk_latency = 2, |
|
2649 latency_invalid = 255 |
|
2650 }; |
|
2651 |
|
2652 /** |
|
2653 * e1000_update_itr - update the dynamic ITR value based on statistics |
|
2654 * @adapter: pointer to adapter |
|
2655 * @itr_setting: current adapter->itr |
|
2656 * @packets: the number of packets during this measurement interval |
|
2657 * @bytes: the number of bytes during this measurement interval |
|
2658 * |
|
2659 * Stores a new ITR value based on packets and byte |
|
2660 * counts during the last interrupt. The advantage of per interrupt |
|
2661 * computation is faster updates and more accurate ITR for the current |
|
2662 * traffic pattern. Constants in this function were computed |
|
2663 * based on theoretical maximum wire speed and thresholds were set based |
|
2664 * on testing data as well as attempting to minimize response time |
|
2665 * while increasing bulk throughput. |
|
2666 * this functionality is controlled by the InterruptThrottleRate module |
|
2667 * parameter (see e1000_param.c) |
|
2668 **/ |
|
2669 static unsigned int e1000_update_itr(struct e1000_adapter *adapter, |
|
2670 u16 itr_setting, int packets, int bytes) |
|
2671 { |
|
2672 unsigned int retval = itr_setting; |
|
2673 struct e1000_hw *hw = &adapter->hw; |
|
2674 |
|
2675 if (unlikely(hw->mac_type < e1000_82540)) |
|
2676 goto update_itr_done; |
|
2677 |
|
2678 if (packets == 0) |
|
2679 goto update_itr_done; |
|
2680 |
|
2681 switch (itr_setting) { |
|
2682 case lowest_latency: |
|
2683 /* jumbo frames get bulk treatment*/ |
|
2684 if (bytes/packets > 8000) |
|
2685 retval = bulk_latency; |
|
2686 else if ((packets < 5) && (bytes > 512)) |
|
2687 retval = low_latency; |
|
2688 break; |
|
2689 case low_latency: /* 50 usec aka 20000 ints/s */ |
|
2690 if (bytes > 10000) { |
|
2691 /* jumbo frames need bulk latency setting */ |
|
2692 if (bytes/packets > 8000) |
|
2693 retval = bulk_latency; |
|
2694 else if ((packets < 10) || ((bytes/packets) > 1200)) |
|
2695 retval = bulk_latency; |
|
2696 else if ((packets > 35)) |
|
2697 retval = lowest_latency; |
|
2698 } else if (bytes/packets > 2000) |
|
2699 retval = bulk_latency; |
|
2700 else if (packets <= 2 && bytes < 512) |
|
2701 retval = lowest_latency; |
|
2702 break; |
|
2703 case bulk_latency: /* 250 usec aka 4000 ints/s */ |
|
2704 if (bytes > 25000) { |
|
2705 if (packets > 35) |
|
2706 retval = low_latency; |
|
2707 } else if (bytes < 6000) { |
|
2708 retval = low_latency; |
|
2709 } |
|
2710 break; |
|
2711 } |
|
2712 |
|
2713 update_itr_done: |
|
2714 return retval; |
|
2715 } |
|
2716 |
|
2717 static void e1000_set_itr(struct e1000_adapter *adapter) |
|
2718 { |
|
2719 struct e1000_hw *hw = &adapter->hw; |
|
2720 u16 current_itr; |
|
2721 u32 new_itr = adapter->itr; |
|
2722 |
|
2723 if (unlikely(hw->mac_type < e1000_82540)) |
|
2724 return; |
|
2725 |
|
2726 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */ |
|
2727 if (unlikely(adapter->link_speed != SPEED_1000)) { |
|
2728 current_itr = 0; |
|
2729 new_itr = 4000; |
|
2730 goto set_itr_now; |
|
2731 } |
|
2732 |
|
2733 adapter->tx_itr = e1000_update_itr(adapter, |
|
2734 adapter->tx_itr, |
|
2735 adapter->total_tx_packets, |
|
2736 adapter->total_tx_bytes); |
|
2737 /* conservative mode (itr 3) eliminates the lowest_latency setting */ |
|
2738 if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency) |
|
2739 adapter->tx_itr = low_latency; |
|
2740 |
|
2741 adapter->rx_itr = e1000_update_itr(adapter, |
|
2742 adapter->rx_itr, |
|
2743 adapter->total_rx_packets, |
|
2744 adapter->total_rx_bytes); |
|
2745 /* conservative mode (itr 3) eliminates the lowest_latency setting */ |
|
2746 if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency) |
|
2747 adapter->rx_itr = low_latency; |
|
2748 |
|
2749 current_itr = max(adapter->rx_itr, adapter->tx_itr); |
|
2750 |
|
2751 switch (current_itr) { |
|
2752 /* counts and packets in update_itr are dependent on these numbers */ |
|
2753 case lowest_latency: |
|
2754 new_itr = 70000; |
|
2755 break; |
|
2756 case low_latency: |
|
2757 new_itr = 20000; /* aka hwitr = ~200 */ |
|
2758 break; |
|
2759 case bulk_latency: |
|
2760 new_itr = 4000; |
|
2761 break; |
|
2762 default: |
|
2763 break; |
|
2764 } |
|
2765 |
|
2766 set_itr_now: |
|
2767 if (new_itr != adapter->itr) { |
|
2768 /* this attempts to bias the interrupt rate towards Bulk |
|
2769 * by adding intermediate steps when interrupt rate is |
|
2770 * increasing */ |
|
2771 new_itr = new_itr > adapter->itr ? |
|
2772 min(adapter->itr + (new_itr >> 2), new_itr) : |
|
2773 new_itr; |
|
2774 adapter->itr = new_itr; |
|
2775 ew32(ITR, 1000000000 / (new_itr * 256)); |
|
2776 } |
|
2777 } |
|
2778 |
|
2779 #define E1000_TX_FLAGS_CSUM 0x00000001 |
|
2780 #define E1000_TX_FLAGS_VLAN 0x00000002 |
|
2781 #define E1000_TX_FLAGS_TSO 0x00000004 |
|
2782 #define E1000_TX_FLAGS_IPV4 0x00000008 |
|
2783 #define E1000_TX_FLAGS_NO_FCS 0x00000010 |
|
2784 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000 |
|
2785 #define E1000_TX_FLAGS_VLAN_SHIFT 16 |
|
2786 |
|
2787 static int e1000_tso(struct e1000_adapter *adapter, |
|
2788 struct e1000_tx_ring *tx_ring, struct sk_buff *skb) |
|
2789 { |
|
2790 struct e1000_context_desc *context_desc; |
|
2791 struct e1000_buffer *buffer_info; |
|
2792 unsigned int i; |
|
2793 u32 cmd_length = 0; |
|
2794 u16 ipcse = 0, tucse, mss; |
|
2795 u8 ipcss, ipcso, tucss, tucso, hdr_len; |
|
2796 int err; |
|
2797 |
|
2798 if (skb_is_gso(skb)) { |
|
2799 if (skb_header_cloned(skb)) { |
|
2800 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC); |
|
2801 if (err) |
|
2802 return err; |
|
2803 } |
|
2804 |
|
2805 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); |
|
2806 mss = skb_shinfo(skb)->gso_size; |
|
2807 if (skb->protocol == htons(ETH_P_IP)) { |
|
2808 struct iphdr *iph = ip_hdr(skb); |
|
2809 iph->tot_len = 0; |
|
2810 iph->check = 0; |
|
2811 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr, |
|
2812 iph->daddr, 0, |
|
2813 IPPROTO_TCP, |
|
2814 0); |
|
2815 cmd_length = E1000_TXD_CMD_IP; |
|
2816 ipcse = skb_transport_offset(skb) - 1; |
|
2817 } else if (skb->protocol == htons(ETH_P_IPV6)) { |
|
2818 ipv6_hdr(skb)->payload_len = 0; |
|
2819 tcp_hdr(skb)->check = |
|
2820 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
|
2821 &ipv6_hdr(skb)->daddr, |
|
2822 0, IPPROTO_TCP, 0); |
|
2823 ipcse = 0; |
|
2824 } |
|
2825 ipcss = skb_network_offset(skb); |
|
2826 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data; |
|
2827 tucss = skb_transport_offset(skb); |
|
2828 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data; |
|
2829 tucse = 0; |
|
2830 |
|
2831 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE | |
|
2832 E1000_TXD_CMD_TCP | (skb->len - (hdr_len))); |
|
2833 |
|
2834 i = tx_ring->next_to_use; |
|
2835 context_desc = E1000_CONTEXT_DESC(*tx_ring, i); |
|
2836 buffer_info = &tx_ring->buffer_info[i]; |
|
2837 |
|
2838 context_desc->lower_setup.ip_fields.ipcss = ipcss; |
|
2839 context_desc->lower_setup.ip_fields.ipcso = ipcso; |
|
2840 context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse); |
|
2841 context_desc->upper_setup.tcp_fields.tucss = tucss; |
|
2842 context_desc->upper_setup.tcp_fields.tucso = tucso; |
|
2843 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse); |
|
2844 context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss); |
|
2845 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len; |
|
2846 context_desc->cmd_and_length = cpu_to_le32(cmd_length); |
|
2847 |
|
2848 buffer_info->time_stamp = jiffies; |
|
2849 buffer_info->next_to_watch = i; |
|
2850 |
|
2851 if (++i == tx_ring->count) i = 0; |
|
2852 tx_ring->next_to_use = i; |
|
2853 |
|
2854 return true; |
|
2855 } |
|
2856 return false; |
|
2857 } |
|
2858 |
|
2859 static bool e1000_tx_csum(struct e1000_adapter *adapter, |
|
2860 struct e1000_tx_ring *tx_ring, struct sk_buff *skb) |
|
2861 { |
|
2862 struct e1000_context_desc *context_desc; |
|
2863 struct e1000_buffer *buffer_info; |
|
2864 unsigned int i; |
|
2865 u8 css; |
|
2866 u32 cmd_len = E1000_TXD_CMD_DEXT; |
|
2867 |
|
2868 if (skb->ip_summed != CHECKSUM_PARTIAL) |
|
2869 return false; |
|
2870 |
|
2871 switch (skb->protocol) { |
|
2872 case cpu_to_be16(ETH_P_IP): |
|
2873 if (ip_hdr(skb)->protocol == IPPROTO_TCP) |
|
2874 cmd_len |= E1000_TXD_CMD_TCP; |
|
2875 break; |
|
2876 case cpu_to_be16(ETH_P_IPV6): |
|
2877 /* XXX not handling all IPV6 headers */ |
|
2878 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) |
|
2879 cmd_len |= E1000_TXD_CMD_TCP; |
|
2880 break; |
|
2881 default: |
|
2882 if (unlikely(net_ratelimit())) |
|
2883 e_warn(drv, "checksum_partial proto=%x!\n", |
|
2884 skb->protocol); |
|
2885 break; |
|
2886 } |
|
2887 |
|
2888 css = skb_checksum_start_offset(skb); |
|
2889 |
|
2890 i = tx_ring->next_to_use; |
|
2891 buffer_info = &tx_ring->buffer_info[i]; |
|
2892 context_desc = E1000_CONTEXT_DESC(*tx_ring, i); |
|
2893 |
|
2894 context_desc->lower_setup.ip_config = 0; |
|
2895 context_desc->upper_setup.tcp_fields.tucss = css; |
|
2896 context_desc->upper_setup.tcp_fields.tucso = |
|
2897 css + skb->csum_offset; |
|
2898 context_desc->upper_setup.tcp_fields.tucse = 0; |
|
2899 context_desc->tcp_seg_setup.data = 0; |
|
2900 context_desc->cmd_and_length = cpu_to_le32(cmd_len); |
|
2901 |
|
2902 buffer_info->time_stamp = jiffies; |
|
2903 buffer_info->next_to_watch = i; |
|
2904 |
|
2905 if (unlikely(++i == tx_ring->count)) i = 0; |
|
2906 tx_ring->next_to_use = i; |
|
2907 |
|
2908 return true; |
|
2909 } |
|
2910 |
|
2911 #define E1000_MAX_TXD_PWR 12 |
|
2912 #define E1000_MAX_DATA_PER_TXD (1<<E1000_MAX_TXD_PWR) |
|
2913 |
|
2914 static int e1000_tx_map(struct e1000_adapter *adapter, |
|
2915 struct e1000_tx_ring *tx_ring, |
|
2916 struct sk_buff *skb, unsigned int first, |
|
2917 unsigned int max_per_txd, unsigned int nr_frags, |
|
2918 unsigned int mss) |
|
2919 { |
|
2920 struct e1000_hw *hw = &adapter->hw; |
|
2921 struct pci_dev *pdev = adapter->pdev; |
|
2922 struct e1000_buffer *buffer_info; |
|
2923 unsigned int len = skb_headlen(skb); |
|
2924 unsigned int offset = 0, size, count = 0, i; |
|
2925 unsigned int f, bytecount, segs; |
|
2926 |
|
2927 i = tx_ring->next_to_use; |
|
2928 |
|
2929 while (len) { |
|
2930 buffer_info = &tx_ring->buffer_info[i]; |
|
2931 size = min(len, max_per_txd); |
|
2932 /* Workaround for Controller erratum -- |
|
2933 * descriptor for non-tso packet in a linear SKB that follows a |
|
2934 * tso gets written back prematurely before the data is fully |
|
2935 * DMA'd to the controller */ |
|
2936 if (!skb->data_len && tx_ring->last_tx_tso && |
|
2937 !skb_is_gso(skb)) { |
|
2938 tx_ring->last_tx_tso = false; |
|
2939 size -= 4; |
|
2940 } |
|
2941 |
|
2942 /* Workaround for premature desc write-backs |
|
2943 * in TSO mode. Append 4-byte sentinel desc */ |
|
2944 if (unlikely(mss && !nr_frags && size == len && size > 8)) |
|
2945 size -= 4; |
|
2946 /* work-around for errata 10 and it applies |
|
2947 * to all controllers in PCI-X mode |
|
2948 * The fix is to make sure that the first descriptor of a |
|
2949 * packet is smaller than 2048 - 16 - 16 (or 2016) bytes |
|
2950 */ |
|
2951 if (unlikely((hw->bus_type == e1000_bus_type_pcix) && |
|
2952 (size > 2015) && count == 0)) |
|
2953 size = 2015; |
|
2954 |
|
2955 /* Workaround for potential 82544 hang in PCI-X. Avoid |
|
2956 * terminating buffers within evenly-aligned dwords. */ |
|
2957 if (unlikely(adapter->pcix_82544 && |
|
2958 !((unsigned long)(skb->data + offset + size - 1) & 4) && |
|
2959 size > 4)) |
|
2960 size -= 4; |
|
2961 |
|
2962 buffer_info->length = size; |
|
2963 /* set time_stamp *before* dma to help avoid a possible race */ |
|
2964 buffer_info->time_stamp = jiffies; |
|
2965 buffer_info->mapped_as_page = false; |
|
2966 buffer_info->dma = dma_map_single(&pdev->dev, |
|
2967 skb->data + offset, |
|
2968 size, DMA_TO_DEVICE); |
|
2969 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) |
|
2970 goto dma_error; |
|
2971 buffer_info->next_to_watch = i; |
|
2972 |
|
2973 len -= size; |
|
2974 offset += size; |
|
2975 count++; |
|
2976 if (len) { |
|
2977 i++; |
|
2978 if (unlikely(i == tx_ring->count)) |
|
2979 i = 0; |
|
2980 } |
|
2981 } |
|
2982 |
|
2983 for (f = 0; f < nr_frags; f++) { |
|
2984 const struct skb_frag_struct *frag; |
|
2985 |
|
2986 frag = &skb_shinfo(skb)->frags[f]; |
|
2987 len = skb_frag_size(frag); |
|
2988 offset = 0; |
|
2989 |
|
2990 while (len) { |
|
2991 unsigned long bufend; |
|
2992 i++; |
|
2993 if (unlikely(i == tx_ring->count)) |
|
2994 i = 0; |
|
2995 |
|
2996 buffer_info = &tx_ring->buffer_info[i]; |
|
2997 size = min(len, max_per_txd); |
|
2998 /* Workaround for premature desc write-backs |
|
2999 * in TSO mode. Append 4-byte sentinel desc */ |
|
3000 if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8)) |
|
3001 size -= 4; |
|
3002 /* Workaround for potential 82544 hang in PCI-X. |
|
3003 * Avoid terminating buffers within evenly-aligned |
|
3004 * dwords. */ |
|
3005 bufend = (unsigned long) |
|
3006 page_to_phys(skb_frag_page(frag)); |
|
3007 bufend += offset + size - 1; |
|
3008 if (unlikely(adapter->pcix_82544 && |
|
3009 !(bufend & 4) && |
|
3010 size > 4)) |
|
3011 size -= 4; |
|
3012 |
|
3013 buffer_info->length = size; |
|
3014 buffer_info->time_stamp = jiffies; |
|
3015 buffer_info->mapped_as_page = true; |
|
3016 buffer_info->dma = skb_frag_dma_map(&pdev->dev, frag, |
|
3017 offset, size, DMA_TO_DEVICE); |
|
3018 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) |
|
3019 goto dma_error; |
|
3020 buffer_info->next_to_watch = i; |
|
3021 |
|
3022 len -= size; |
|
3023 offset += size; |
|
3024 count++; |
|
3025 } |
|
3026 } |
|
3027 |
|
3028 segs = skb_shinfo(skb)->gso_segs ?: 1; |
|
3029 /* multiply data chunks by size of headers */ |
|
3030 bytecount = ((segs - 1) * skb_headlen(skb)) + skb->len; |
|
3031 |
|
3032 tx_ring->buffer_info[i].skb = skb; |
|
3033 tx_ring->buffer_info[i].segs = segs; |
|
3034 tx_ring->buffer_info[i].bytecount = bytecount; |
|
3035 tx_ring->buffer_info[first].next_to_watch = i; |
|
3036 |
|
3037 return count; |
|
3038 |
|
3039 dma_error: |
|
3040 dev_err(&pdev->dev, "TX DMA map failed\n"); |
|
3041 buffer_info->dma = 0; |
|
3042 if (count) |
|
3043 count--; |
|
3044 |
|
3045 while (count--) { |
|
3046 if (i==0) |
|
3047 i += tx_ring->count; |
|
3048 i--; |
|
3049 buffer_info = &tx_ring->buffer_info[i]; |
|
3050 e1000_unmap_and_free_tx_resource(adapter, buffer_info); |
|
3051 } |
|
3052 |
|
3053 return 0; |
|
3054 } |
|
3055 |
|
3056 static void e1000_tx_queue(struct e1000_adapter *adapter, |
|
3057 struct e1000_tx_ring *tx_ring, int tx_flags, |
|
3058 int count) |
|
3059 { |
|
3060 struct e1000_hw *hw = &adapter->hw; |
|
3061 struct e1000_tx_desc *tx_desc = NULL; |
|
3062 struct e1000_buffer *buffer_info; |
|
3063 u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS; |
|
3064 unsigned int i; |
|
3065 |
|
3066 if (likely(tx_flags & E1000_TX_FLAGS_TSO)) { |
|
3067 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D | |
|
3068 E1000_TXD_CMD_TSE; |
|
3069 txd_upper |= E1000_TXD_POPTS_TXSM << 8; |
|
3070 |
|
3071 if (likely(tx_flags & E1000_TX_FLAGS_IPV4)) |
|
3072 txd_upper |= E1000_TXD_POPTS_IXSM << 8; |
|
3073 } |
|
3074 |
|
3075 if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) { |
|
3076 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D; |
|
3077 txd_upper |= E1000_TXD_POPTS_TXSM << 8; |
|
3078 } |
|
3079 |
|
3080 if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) { |
|
3081 txd_lower |= E1000_TXD_CMD_VLE; |
|
3082 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK); |
|
3083 } |
|
3084 |
|
3085 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS)) |
|
3086 txd_lower &= ~(E1000_TXD_CMD_IFCS); |
|
3087 |
|
3088 i = tx_ring->next_to_use; |
|
3089 |
|
3090 while (count--) { |
|
3091 buffer_info = &tx_ring->buffer_info[i]; |
|
3092 tx_desc = E1000_TX_DESC(*tx_ring, i); |
|
3093 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma); |
|
3094 tx_desc->lower.data = |
|
3095 cpu_to_le32(txd_lower | buffer_info->length); |
|
3096 tx_desc->upper.data = cpu_to_le32(txd_upper); |
|
3097 if (unlikely(++i == tx_ring->count)) i = 0; |
|
3098 } |
|
3099 |
|
3100 tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd); |
|
3101 |
|
3102 /* txd_cmd re-enables FCS, so we'll re-disable it here as desired. */ |
|
3103 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS)) |
|
3104 tx_desc->lower.data &= ~(cpu_to_le32(E1000_TXD_CMD_IFCS)); |
|
3105 |
|
3106 /* Force memory writes to complete before letting h/w |
|
3107 * know there are new descriptors to fetch. (Only |
|
3108 * applicable for weak-ordered memory model archs, |
|
3109 * such as IA-64). */ |
|
3110 wmb(); |
|
3111 |
|
3112 tx_ring->next_to_use = i; |
|
3113 writel(i, hw->hw_addr + tx_ring->tdt); |
|
3114 /* we need this if more than one processor can write to our tail |
|
3115 * at a time, it syncronizes IO on IA64/Altix systems */ |
|
3116 mmiowb(); |
|
3117 } |
|
3118 |
|
3119 /** |
|
3120 * 82547 workaround to avoid controller hang in half-duplex environment. |
|
3121 * The workaround is to avoid queuing a large packet that would span |
|
3122 * the internal Tx FIFO ring boundary by notifying the stack to resend |
|
3123 * the packet at a later time. This gives the Tx FIFO an opportunity to |
|
3124 * flush all packets. When that occurs, we reset the Tx FIFO pointers |
|
3125 * to the beginning of the Tx FIFO. |
|
3126 **/ |
|
3127 |
|
3128 #define E1000_FIFO_HDR 0x10 |
|
3129 #define E1000_82547_PAD_LEN 0x3E0 |
|
3130 |
|
3131 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter, |
|
3132 struct sk_buff *skb) |
|
3133 { |
|
3134 u32 fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head; |
|
3135 u32 skb_fifo_len = skb->len + E1000_FIFO_HDR; |
|
3136 |
|
3137 skb_fifo_len = ALIGN(skb_fifo_len, E1000_FIFO_HDR); |
|
3138 |
|
3139 if (adapter->link_duplex != HALF_DUPLEX) |
|
3140 goto no_fifo_stall_required; |
|
3141 |
|
3142 if (atomic_read(&adapter->tx_fifo_stall)) |
|
3143 return 1; |
|
3144 |
|
3145 if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) { |
|
3146 atomic_set(&adapter->tx_fifo_stall, 1); |
|
3147 return 1; |
|
3148 } |
|
3149 |
|
3150 no_fifo_stall_required: |
|
3151 adapter->tx_fifo_head += skb_fifo_len; |
|
3152 if (adapter->tx_fifo_head >= adapter->tx_fifo_size) |
|
3153 adapter->tx_fifo_head -= adapter->tx_fifo_size; |
|
3154 return 0; |
|
3155 } |
|
3156 |
|
3157 static int __e1000_maybe_stop_tx(struct net_device *netdev, int size) |
|
3158 { |
|
3159 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
3160 struct e1000_tx_ring *tx_ring = adapter->tx_ring; |
|
3161 |
|
3162 if (adapter->ecdev) { |
|
3163 return -EBUSY; |
|
3164 } |
|
3165 |
|
3166 netif_stop_queue(netdev); |
|
3167 /* Herbert's original patch had: |
|
3168 * smp_mb__after_netif_stop_queue(); |
|
3169 * but since that doesn't exist yet, just open code it. */ |
|
3170 smp_mb(); |
|
3171 |
|
3172 /* We need to check again in a case another CPU has just |
|
3173 * made room available. */ |
|
3174 if (likely(E1000_DESC_UNUSED(tx_ring) < size)) |
|
3175 return -EBUSY; |
|
3176 |
|
3177 /* A reprieve! */ |
|
3178 netif_start_queue(netdev); |
|
3179 ++adapter->restart_queue; |
|
3180 return 0; |
|
3181 } |
|
3182 |
|
3183 static int e1000_maybe_stop_tx(struct net_device *netdev, |
|
3184 struct e1000_tx_ring *tx_ring, int size) |
|
3185 { |
|
3186 if (likely(E1000_DESC_UNUSED(tx_ring) >= size)) |
|
3187 return 0; |
|
3188 return __e1000_maybe_stop_tx(netdev, size); |
|
3189 } |
|
3190 |
|
3191 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 ) |
|
3192 static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb, |
|
3193 struct net_device *netdev) |
|
3194 { |
|
3195 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
3196 struct e1000_hw *hw = &adapter->hw; |
|
3197 struct e1000_tx_ring *tx_ring; |
|
3198 unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD; |
|
3199 unsigned int max_txd_pwr = E1000_MAX_TXD_PWR; |
|
3200 unsigned int tx_flags = 0; |
|
3201 unsigned int len = skb_headlen(skb); |
|
3202 unsigned int nr_frags; |
|
3203 unsigned int mss; |
|
3204 int count = 0; |
|
3205 int tso; |
|
3206 unsigned int f; |
|
3207 |
|
3208 /* This goes back to the question of how to logically map a tx queue |
|
3209 * to a flow. Right now, performance is impacted slightly negatively |
|
3210 * if using multiple tx queues. If the stack breaks away from a |
|
3211 * single qdisc implementation, we can look at this again. */ |
|
3212 tx_ring = adapter->tx_ring; |
|
3213 |
|
3214 if (unlikely(skb->len <= 0)) { |
|
3215 if (!adapter->ecdev) { |
|
3216 dev_kfree_skb_any(skb); |
|
3217 } |
|
3218 return NETDEV_TX_OK; |
|
3219 } |
|
3220 |
|
3221 mss = skb_shinfo(skb)->gso_size; |
|
3222 /* The controller does a simple calculation to |
|
3223 * make sure there is enough room in the FIFO before |
|
3224 * initiating the DMA for each buffer. The calc is: |
|
3225 * 4 = ceil(buffer len/mss). To make sure we don't |
|
3226 * overrun the FIFO, adjust the max buffer len if mss |
|
3227 * drops. */ |
|
3228 if (mss) { |
|
3229 u8 hdr_len; |
|
3230 max_per_txd = min(mss << 2, max_per_txd); |
|
3231 max_txd_pwr = fls(max_per_txd) - 1; |
|
3232 |
|
3233 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); |
|
3234 if (skb->data_len && hdr_len == len) { |
|
3235 switch (hw->mac_type) { |
|
3236 unsigned int pull_size; |
|
3237 case e1000_82544: |
|
3238 /* Make sure we have room to chop off 4 bytes, |
|
3239 * and that the end alignment will work out to |
|
3240 * this hardware's requirements |
|
3241 * NOTE: this is a TSO only workaround |
|
3242 * if end byte alignment not correct move us |
|
3243 * into the next dword */ |
|
3244 if ((unsigned long)(skb_tail_pointer(skb) - 1) & 4) |
|
3245 break; |
|
3246 /* fall through */ |
|
3247 pull_size = min((unsigned int)4, skb->data_len); |
|
3248 if (!__pskb_pull_tail(skb, pull_size)) { |
|
3249 e_err(drv, "__pskb_pull_tail " |
|
3250 "failed.\n"); |
|
3251 if (!adapter->ecdev) { |
|
3252 dev_kfree_skb_any(skb); |
|
3253 } |
|
3254 return NETDEV_TX_OK; |
|
3255 } |
|
3256 len = skb_headlen(skb); |
|
3257 break; |
|
3258 default: |
|
3259 /* do nothing */ |
|
3260 break; |
|
3261 } |
|
3262 } |
|
3263 } |
|
3264 |
|
3265 /* reserve a descriptor for the offload context */ |
|
3266 if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL)) |
|
3267 count++; |
|
3268 count++; |
|
3269 |
|
3270 /* Controller Erratum workaround */ |
|
3271 if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb)) |
|
3272 count++; |
|
3273 |
|
3274 count += TXD_USE_COUNT(len, max_txd_pwr); |
|
3275 |
|
3276 if (adapter->pcix_82544) |
|
3277 count++; |
|
3278 |
|
3279 /* work-around for errata 10 and it applies to all controllers |
|
3280 * in PCI-X mode, so add one more descriptor to the count |
|
3281 */ |
|
3282 if (unlikely((hw->bus_type == e1000_bus_type_pcix) && |
|
3283 (len > 2015))) |
|
3284 count++; |
|
3285 |
|
3286 nr_frags = skb_shinfo(skb)->nr_frags; |
|
3287 for (f = 0; f < nr_frags; f++) |
|
3288 count += TXD_USE_COUNT(skb_frag_size(&skb_shinfo(skb)->frags[f]), |
|
3289 max_txd_pwr); |
|
3290 if (adapter->pcix_82544) |
|
3291 count += nr_frags; |
|
3292 |
|
3293 /* need: count + 2 desc gap to keep tail from touching |
|
3294 * head, otherwise try next time */ |
|
3295 if (unlikely(e1000_maybe_stop_tx(netdev, tx_ring, count + 2))) |
|
3296 return NETDEV_TX_BUSY; |
|
3297 |
|
3298 if (unlikely((hw->mac_type == e1000_82547) && |
|
3299 (e1000_82547_fifo_workaround(adapter, skb)))) { |
|
3300 if (!adapter->ecdev) { |
|
3301 netif_stop_queue(netdev); |
|
3302 if (!test_bit(__E1000_DOWN, &adapter->flags)) |
|
3303 schedule_delayed_work(&adapter->fifo_stall_task, 1); |
|
3304 } |
|
3305 return NETDEV_TX_BUSY; |
|
3306 } |
|
3307 |
|
3308 if (vlan_tx_tag_present(skb)) { |
|
3309 tx_flags |= E1000_TX_FLAGS_VLAN; |
|
3310 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT); |
|
3311 } |
|
3312 |
|
3313 first = tx_ring->next_to_use; |
|
3314 |
|
3315 tso = e1000_tso(adapter, tx_ring, skb); |
|
3316 if (tso < 0) { |
|
3317 if (!adapter->ecdev) { |
|
3318 dev_kfree_skb_any(skb); |
|
3319 } |
|
3320 return NETDEV_TX_OK; |
|
3321 } |
|
3322 |
|
3323 if (likely(tso)) { |
|
3324 if (likely(hw->mac_type != e1000_82544)) |
|
3325 tx_ring->last_tx_tso = true; |
|
3326 tx_flags |= E1000_TX_FLAGS_TSO; |
|
3327 } else if (likely(e1000_tx_csum(adapter, tx_ring, skb))) |
|
3328 tx_flags |= E1000_TX_FLAGS_CSUM; |
|
3329 |
|
3330 if (likely(skb->protocol == htons(ETH_P_IP))) |
|
3331 tx_flags |= E1000_TX_FLAGS_IPV4; |
|
3332 |
|
3333 if (unlikely(skb->no_fcs)) |
|
3334 tx_flags |= E1000_TX_FLAGS_NO_FCS; |
|
3335 |
|
3336 count = e1000_tx_map(adapter, tx_ring, skb, first, max_per_txd, |
|
3337 nr_frags, mss); |
|
3338 |
|
3339 if (count) { |
|
3340 e1000_tx_queue(adapter, tx_ring, tx_flags, count); |
|
3341 if (!adapter->ecdev) { |
|
3342 /* Make sure there is space in the ring for the next send. */ |
|
3343 e1000_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 2); |
|
3344 } |
|
3345 |
|
3346 } else { |
|
3347 if (!adapter->ecdev) { |
|
3348 dev_kfree_skb_any(skb); |
|
3349 } |
|
3350 tx_ring->buffer_info[first].time_stamp = 0; |
|
3351 tx_ring->next_to_use = first; |
|
3352 } |
|
3353 |
|
3354 return NETDEV_TX_OK; |
|
3355 } |
|
3356 |
|
3357 #define NUM_REGS 38 /* 1 based count */ |
|
3358 static void e1000_regdump(struct e1000_adapter *adapter) |
|
3359 { |
|
3360 struct e1000_hw *hw = &adapter->hw; |
|
3361 u32 regs[NUM_REGS]; |
|
3362 u32 *regs_buff = regs; |
|
3363 int i = 0; |
|
3364 |
|
3365 static const char * const reg_name[] = { |
|
3366 "CTRL", "STATUS", |
|
3367 "RCTL", "RDLEN", "RDH", "RDT", "RDTR", |
|
3368 "TCTL", "TDBAL", "TDBAH", "TDLEN", "TDH", "TDT", |
|
3369 "TIDV", "TXDCTL", "TADV", "TARC0", |
|
3370 "TDBAL1", "TDBAH1", "TDLEN1", "TDH1", "TDT1", |
|
3371 "TXDCTL1", "TARC1", |
|
3372 "CTRL_EXT", "ERT", "RDBAL", "RDBAH", |
|
3373 "TDFH", "TDFT", "TDFHS", "TDFTS", "TDFPC", |
|
3374 "RDFH", "RDFT", "RDFHS", "RDFTS", "RDFPC" |
|
3375 }; |
|
3376 |
|
3377 regs_buff[0] = er32(CTRL); |
|
3378 regs_buff[1] = er32(STATUS); |
|
3379 |
|
3380 regs_buff[2] = er32(RCTL); |
|
3381 regs_buff[3] = er32(RDLEN); |
|
3382 regs_buff[4] = er32(RDH); |
|
3383 regs_buff[5] = er32(RDT); |
|
3384 regs_buff[6] = er32(RDTR); |
|
3385 |
|
3386 regs_buff[7] = er32(TCTL); |
|
3387 regs_buff[8] = er32(TDBAL); |
|
3388 regs_buff[9] = er32(TDBAH); |
|
3389 regs_buff[10] = er32(TDLEN); |
|
3390 regs_buff[11] = er32(TDH); |
|
3391 regs_buff[12] = er32(TDT); |
|
3392 regs_buff[13] = er32(TIDV); |
|
3393 regs_buff[14] = er32(TXDCTL); |
|
3394 regs_buff[15] = er32(TADV); |
|
3395 regs_buff[16] = er32(TARC0); |
|
3396 |
|
3397 regs_buff[17] = er32(TDBAL1); |
|
3398 regs_buff[18] = er32(TDBAH1); |
|
3399 regs_buff[19] = er32(TDLEN1); |
|
3400 regs_buff[20] = er32(TDH1); |
|
3401 regs_buff[21] = er32(TDT1); |
|
3402 regs_buff[22] = er32(TXDCTL1); |
|
3403 regs_buff[23] = er32(TARC1); |
|
3404 regs_buff[24] = er32(CTRL_EXT); |
|
3405 regs_buff[25] = er32(ERT); |
|
3406 regs_buff[26] = er32(RDBAL0); |
|
3407 regs_buff[27] = er32(RDBAH0); |
|
3408 regs_buff[28] = er32(TDFH); |
|
3409 regs_buff[29] = er32(TDFT); |
|
3410 regs_buff[30] = er32(TDFHS); |
|
3411 regs_buff[31] = er32(TDFTS); |
|
3412 regs_buff[32] = er32(TDFPC); |
|
3413 regs_buff[33] = er32(RDFH); |
|
3414 regs_buff[34] = er32(RDFT); |
|
3415 regs_buff[35] = er32(RDFHS); |
|
3416 regs_buff[36] = er32(RDFTS); |
|
3417 regs_buff[37] = er32(RDFPC); |
|
3418 |
|
3419 pr_info("Register dump\n"); |
|
3420 for (i = 0; i < NUM_REGS; i++) |
|
3421 pr_info("%-15s %08x\n", reg_name[i], regs_buff[i]); |
|
3422 } |
|
3423 |
|
3424 /* |
|
3425 * e1000_dump: Print registers, tx ring and rx ring |
|
3426 */ |
|
3427 static void e1000_dump(struct e1000_adapter *adapter) |
|
3428 { |
|
3429 /* this code doesn't handle multiple rings */ |
|
3430 struct e1000_tx_ring *tx_ring = adapter->tx_ring; |
|
3431 struct e1000_rx_ring *rx_ring = adapter->rx_ring; |
|
3432 int i; |
|
3433 |
|
3434 if (!netif_msg_hw(adapter)) |
|
3435 return; |
|
3436 |
|
3437 /* Print Registers */ |
|
3438 e1000_regdump(adapter); |
|
3439 |
|
3440 /* |
|
3441 * transmit dump |
|
3442 */ |
|
3443 pr_info("TX Desc ring0 dump\n"); |
|
3444 |
|
3445 /* Transmit Descriptor Formats - DEXT[29] is 0 (Legacy) or 1 (Extended) |
|
3446 * |
|
3447 * Legacy Transmit Descriptor |
|
3448 * +--------------------------------------------------------------+ |
|
3449 * 0 | Buffer Address [63:0] (Reserved on Write Back) | |
|
3450 * +--------------------------------------------------------------+ |
|
3451 * 8 | Special | CSS | Status | CMD | CSO | Length | |
|
3452 * +--------------------------------------------------------------+ |
|
3453 * 63 48 47 36 35 32 31 24 23 16 15 0 |
|
3454 * |
|
3455 * Extended Context Descriptor (DTYP=0x0) for TSO or checksum offload |
|
3456 * 63 48 47 40 39 32 31 16 15 8 7 0 |
|
3457 * +----------------------------------------------------------------+ |
|
3458 * 0 | TUCSE | TUCS0 | TUCSS | IPCSE | IPCS0 | IPCSS | |
|
3459 * +----------------------------------------------------------------+ |
|
3460 * 8 | MSS | HDRLEN | RSV | STA | TUCMD | DTYP | PAYLEN | |
|
3461 * +----------------------------------------------------------------+ |
|
3462 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0 |
|
3463 * |
|
3464 * Extended Data Descriptor (DTYP=0x1) |
|
3465 * +----------------------------------------------------------------+ |
|
3466 * 0 | Buffer Address [63:0] | |
|
3467 * +----------------------------------------------------------------+ |
|
3468 * 8 | VLAN tag | POPTS | Rsvd | Status | Command | DTYP | DTALEN | |
|
3469 * +----------------------------------------------------------------+ |
|
3470 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0 |
|
3471 */ |
|
3472 pr_info("Tc[desc] [Ce CoCsIpceCoS] [MssHlRSCm0Plen] [bi->dma ] leng ntw timestmp bi->skb\n"); |
|
3473 pr_info("Td[desc] [address 63:0 ] [VlaPoRSCm1Dlen] [bi->dma ] leng ntw timestmp bi->skb\n"); |
|
3474 |
|
3475 if (!netif_msg_tx_done(adapter)) |
|
3476 goto rx_ring_summary; |
|
3477 |
|
3478 for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) { |
|
3479 struct e1000_tx_desc *tx_desc = E1000_TX_DESC(*tx_ring, i); |
|
3480 struct e1000_buffer *buffer_info = &tx_ring->buffer_info[i]; |
|
3481 struct my_u { __le64 a; __le64 b; }; |
|
3482 struct my_u *u = (struct my_u *)tx_desc; |
|
3483 const char *type; |
|
3484 |
|
3485 if (i == tx_ring->next_to_use && i == tx_ring->next_to_clean) |
|
3486 type = "NTC/U"; |
|
3487 else if (i == tx_ring->next_to_use) |
|
3488 type = "NTU"; |
|
3489 else if (i == tx_ring->next_to_clean) |
|
3490 type = "NTC"; |
|
3491 else |
|
3492 type = ""; |
|
3493 |
|
3494 pr_info("T%c[0x%03X] %016llX %016llX %016llX %04X %3X %016llX %p %s\n", |
|
3495 ((le64_to_cpu(u->b) & (1<<20)) ? 'd' : 'c'), i, |
|
3496 le64_to_cpu(u->a), le64_to_cpu(u->b), |
|
3497 (u64)buffer_info->dma, buffer_info->length, |
|
3498 buffer_info->next_to_watch, |
|
3499 (u64)buffer_info->time_stamp, buffer_info->skb, type); |
|
3500 } |
|
3501 |
|
3502 rx_ring_summary: |
|
3503 /* |
|
3504 * receive dump |
|
3505 */ |
|
3506 pr_info("\nRX Desc ring dump\n"); |
|
3507 |
|
3508 /* Legacy Receive Descriptor Format |
|
3509 * |
|
3510 * +-----------------------------------------------------+ |
|
3511 * | Buffer Address [63:0] | |
|
3512 * +-----------------------------------------------------+ |
|
3513 * | VLAN Tag | Errors | Status 0 | Packet csum | Length | |
|
3514 * +-----------------------------------------------------+ |
|
3515 * 63 48 47 40 39 32 31 16 15 0 |
|
3516 */ |
|
3517 pr_info("R[desc] [address 63:0 ] [vl er S cks ln] [bi->dma ] [bi->skb]\n"); |
|
3518 |
|
3519 if (!netif_msg_rx_status(adapter)) |
|
3520 goto exit; |
|
3521 |
|
3522 for (i = 0; rx_ring->desc && (i < rx_ring->count); i++) { |
|
3523 struct e1000_rx_desc *rx_desc = E1000_RX_DESC(*rx_ring, i); |
|
3524 struct e1000_buffer *buffer_info = &rx_ring->buffer_info[i]; |
|
3525 struct my_u { __le64 a; __le64 b; }; |
|
3526 struct my_u *u = (struct my_u *)rx_desc; |
|
3527 const char *type; |
|
3528 |
|
3529 if (i == rx_ring->next_to_use) |
|
3530 type = "NTU"; |
|
3531 else if (i == rx_ring->next_to_clean) |
|
3532 type = "NTC"; |
|
3533 else |
|
3534 type = ""; |
|
3535 |
|
3536 pr_info("R[0x%03X] %016llX %016llX %016llX %p %s\n", |
|
3537 i, le64_to_cpu(u->a), le64_to_cpu(u->b), |
|
3538 (u64)buffer_info->dma, buffer_info->skb, type); |
|
3539 } /* for */ |
|
3540 |
|
3541 /* dump the descriptor caches */ |
|
3542 /* rx */ |
|
3543 pr_info("Rx descriptor cache in 64bit format\n"); |
|
3544 for (i = 0x6000; i <= 0x63FF ; i += 0x10) { |
|
3545 pr_info("R%04X: %08X|%08X %08X|%08X\n", |
|
3546 i, |
|
3547 readl(adapter->hw.hw_addr + i+4), |
|
3548 readl(adapter->hw.hw_addr + i), |
|
3549 readl(adapter->hw.hw_addr + i+12), |
|
3550 readl(adapter->hw.hw_addr + i+8)); |
|
3551 } |
|
3552 /* tx */ |
|
3553 pr_info("Tx descriptor cache in 64bit format\n"); |
|
3554 for (i = 0x7000; i <= 0x73FF ; i += 0x10) { |
|
3555 pr_info("T%04X: %08X|%08X %08X|%08X\n", |
|
3556 i, |
|
3557 readl(adapter->hw.hw_addr + i+4), |
|
3558 readl(adapter->hw.hw_addr + i), |
|
3559 readl(adapter->hw.hw_addr + i+12), |
|
3560 readl(adapter->hw.hw_addr + i+8)); |
|
3561 } |
|
3562 exit: |
|
3563 return; |
|
3564 } |
|
3565 |
|
3566 /** |
|
3567 * e1000_tx_timeout - Respond to a Tx Hang |
|
3568 * @netdev: network interface device structure |
|
3569 **/ |
|
3570 |
|
3571 static void e1000_tx_timeout(struct net_device *netdev) |
|
3572 { |
|
3573 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
3574 |
|
3575 /* Do the reset outside of interrupt context */ |
|
3576 adapter->tx_timeout_count++; |
|
3577 schedule_work(&adapter->reset_task); |
|
3578 } |
|
3579 |
|
3580 static void e1000_reset_task(struct work_struct *work) |
|
3581 { |
|
3582 struct e1000_adapter *adapter = |
|
3583 container_of(work, struct e1000_adapter, reset_task); |
|
3584 |
|
3585 if (test_bit(__E1000_DOWN, &adapter->flags)) |
|
3586 return; |
|
3587 e_err(drv, "Reset adapter\n"); |
|
3588 e1000_reinit_safe(adapter); |
|
3589 } |
|
3590 |
|
3591 /** |
|
3592 * e1000_get_stats - Get System Network Statistics |
|
3593 * @netdev: network interface device structure |
|
3594 * |
|
3595 * Returns the address of the device statistics structure. |
|
3596 * The statistics are actually updated from the watchdog. |
|
3597 **/ |
|
3598 |
|
3599 static struct net_device_stats *e1000_get_stats(struct net_device *netdev) |
|
3600 { |
|
3601 /* only return the current stats */ |
|
3602 return &netdev->stats; |
|
3603 } |
|
3604 |
|
3605 /** |
|
3606 * e1000_change_mtu - Change the Maximum Transfer Unit |
|
3607 * @netdev: network interface device structure |
|
3608 * @new_mtu: new value for maximum frame size |
|
3609 * |
|
3610 * Returns 0 on success, negative on failure |
|
3611 **/ |
|
3612 |
|
3613 static int e1000_change_mtu(struct net_device *netdev, int new_mtu) |
|
3614 { |
|
3615 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
3616 struct e1000_hw *hw = &adapter->hw; |
|
3617 int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE; |
|
3618 |
|
3619 if (adapter->ecdev) { |
|
3620 return -EBUSY; |
|
3621 } |
|
3622 |
|
3623 if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) || |
|
3624 (max_frame > MAX_JUMBO_FRAME_SIZE)) { |
|
3625 e_err(probe, "Invalid MTU setting\n"); |
|
3626 return -EINVAL; |
|
3627 } |
|
3628 |
|
3629 /* Adapter-specific max frame size limits. */ |
|
3630 switch (hw->mac_type) { |
|
3631 case e1000_undefined ... e1000_82542_rev2_1: |
|
3632 if (max_frame > (ETH_FRAME_LEN + ETH_FCS_LEN)) { |
|
3633 e_err(probe, "Jumbo Frames not supported.\n"); |
|
3634 return -EINVAL; |
|
3635 } |
|
3636 break; |
|
3637 default: |
|
3638 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */ |
|
3639 break; |
|
3640 } |
|
3641 |
|
3642 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags)) |
|
3643 msleep(1); |
|
3644 /* e1000_down has a dependency on max_frame_size */ |
|
3645 hw->max_frame_size = max_frame; |
|
3646 if (netif_running(netdev)) |
|
3647 e1000_down(adapter); |
|
3648 |
|
3649 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN |
|
3650 * means we reserve 2 more, this pushes us to allocate from the next |
|
3651 * larger slab size. |
|
3652 * i.e. RXBUFFER_2048 --> size-4096 slab |
|
3653 * however with the new *_jumbo_rx* routines, jumbo receives will use |
|
3654 * fragmented skbs */ |
|
3655 |
|
3656 if (max_frame <= E1000_RXBUFFER_2048) |
|
3657 adapter->rx_buffer_len = E1000_RXBUFFER_2048; |
|
3658 else |
|
3659 #if (PAGE_SIZE >= E1000_RXBUFFER_16384) |
|
3660 adapter->rx_buffer_len = E1000_RXBUFFER_16384; |
|
3661 #elif (PAGE_SIZE >= E1000_RXBUFFER_4096) |
|
3662 adapter->rx_buffer_len = PAGE_SIZE; |
|
3663 #endif |
|
3664 |
|
3665 /* adjust allocation if LPE protects us, and we aren't using SBP */ |
|
3666 if (!hw->tbi_compatibility_on && |
|
3667 ((max_frame == (ETH_FRAME_LEN + ETH_FCS_LEN)) || |
|
3668 (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE))) |
|
3669 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE; |
|
3670 |
|
3671 pr_info("%s changing MTU from %d to %d\n", |
|
3672 netdev->name, netdev->mtu, new_mtu); |
|
3673 netdev->mtu = new_mtu; |
|
3674 |
|
3675 if (netif_running(netdev)) |
|
3676 e1000_up(adapter); |
|
3677 else |
|
3678 e1000_reset(adapter); |
|
3679 |
|
3680 clear_bit(__E1000_RESETTING, &adapter->flags); |
|
3681 |
|
3682 return 0; |
|
3683 } |
|
3684 |
|
3685 /** |
|
3686 * e1000_update_stats - Update the board statistics counters |
|
3687 * @adapter: board private structure |
|
3688 **/ |
|
3689 |
|
3690 void e1000_update_stats(struct e1000_adapter *adapter) |
|
3691 { |
|
3692 struct net_device *netdev = adapter->netdev; |
|
3693 struct e1000_hw *hw = &adapter->hw; |
|
3694 struct pci_dev *pdev = adapter->pdev; |
|
3695 unsigned long flags = 0; |
|
3696 u16 phy_tmp; |
|
3697 |
|
3698 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF |
|
3699 |
|
3700 /* |
|
3701 * Prevent stats update while adapter is being reset, or if the pci |
|
3702 * connection is down. |
|
3703 */ |
|
3704 if (adapter->link_speed == 0) |
|
3705 return; |
|
3706 if (pci_channel_offline(pdev)) |
|
3707 return; |
|
3708 |
|
3709 if (!adapter->ecdev) { |
|
3710 spin_lock_irqsave(&adapter->stats_lock, flags); |
|
3711 } |
|
3712 |
|
3713 /* these counters are modified from e1000_tbi_adjust_stats, |
|
3714 * called from the interrupt context, so they must only |
|
3715 * be written while holding adapter->stats_lock |
|
3716 */ |
|
3717 |
|
3718 adapter->stats.crcerrs += er32(CRCERRS); |
|
3719 adapter->stats.gprc += er32(GPRC); |
|
3720 adapter->stats.gorcl += er32(GORCL); |
|
3721 adapter->stats.gorch += er32(GORCH); |
|
3722 adapter->stats.bprc += er32(BPRC); |
|
3723 adapter->stats.mprc += er32(MPRC); |
|
3724 adapter->stats.roc += er32(ROC); |
|
3725 |
|
3726 adapter->stats.prc64 += er32(PRC64); |
|
3727 adapter->stats.prc127 += er32(PRC127); |
|
3728 adapter->stats.prc255 += er32(PRC255); |
|
3729 adapter->stats.prc511 += er32(PRC511); |
|
3730 adapter->stats.prc1023 += er32(PRC1023); |
|
3731 adapter->stats.prc1522 += er32(PRC1522); |
|
3732 |
|
3733 adapter->stats.symerrs += er32(SYMERRS); |
|
3734 adapter->stats.mpc += er32(MPC); |
|
3735 adapter->stats.scc += er32(SCC); |
|
3736 adapter->stats.ecol += er32(ECOL); |
|
3737 adapter->stats.mcc += er32(MCC); |
|
3738 adapter->stats.latecol += er32(LATECOL); |
|
3739 adapter->stats.dc += er32(DC); |
|
3740 adapter->stats.sec += er32(SEC); |
|
3741 adapter->stats.rlec += er32(RLEC); |
|
3742 adapter->stats.xonrxc += er32(XONRXC); |
|
3743 adapter->stats.xontxc += er32(XONTXC); |
|
3744 adapter->stats.xoffrxc += er32(XOFFRXC); |
|
3745 adapter->stats.xofftxc += er32(XOFFTXC); |
|
3746 adapter->stats.fcruc += er32(FCRUC); |
|
3747 adapter->stats.gptc += er32(GPTC); |
|
3748 adapter->stats.gotcl += er32(GOTCL); |
|
3749 adapter->stats.gotch += er32(GOTCH); |
|
3750 adapter->stats.rnbc += er32(RNBC); |
|
3751 adapter->stats.ruc += er32(RUC); |
|
3752 adapter->stats.rfc += er32(RFC); |
|
3753 adapter->stats.rjc += er32(RJC); |
|
3754 adapter->stats.torl += er32(TORL); |
|
3755 adapter->stats.torh += er32(TORH); |
|
3756 adapter->stats.totl += er32(TOTL); |
|
3757 adapter->stats.toth += er32(TOTH); |
|
3758 adapter->stats.tpr += er32(TPR); |
|
3759 |
|
3760 adapter->stats.ptc64 += er32(PTC64); |
|
3761 adapter->stats.ptc127 += er32(PTC127); |
|
3762 adapter->stats.ptc255 += er32(PTC255); |
|
3763 adapter->stats.ptc511 += er32(PTC511); |
|
3764 adapter->stats.ptc1023 += er32(PTC1023); |
|
3765 adapter->stats.ptc1522 += er32(PTC1522); |
|
3766 |
|
3767 adapter->stats.mptc += er32(MPTC); |
|
3768 adapter->stats.bptc += er32(BPTC); |
|
3769 |
|
3770 /* used for adaptive IFS */ |
|
3771 |
|
3772 hw->tx_packet_delta = er32(TPT); |
|
3773 adapter->stats.tpt += hw->tx_packet_delta; |
|
3774 hw->collision_delta = er32(COLC); |
|
3775 adapter->stats.colc += hw->collision_delta; |
|
3776 |
|
3777 if (hw->mac_type >= e1000_82543) { |
|
3778 adapter->stats.algnerrc += er32(ALGNERRC); |
|
3779 adapter->stats.rxerrc += er32(RXERRC); |
|
3780 adapter->stats.tncrs += er32(TNCRS); |
|
3781 adapter->stats.cexterr += er32(CEXTERR); |
|
3782 adapter->stats.tsctc += er32(TSCTC); |
|
3783 adapter->stats.tsctfc += er32(TSCTFC); |
|
3784 } |
|
3785 |
|
3786 /* Fill out the OS statistics structure */ |
|
3787 netdev->stats.multicast = adapter->stats.mprc; |
|
3788 netdev->stats.collisions = adapter->stats.colc; |
|
3789 |
|
3790 /* Rx Errors */ |
|
3791 |
|
3792 /* RLEC on some newer hardware can be incorrect so build |
|
3793 * our own version based on RUC and ROC */ |
|
3794 netdev->stats.rx_errors = adapter->stats.rxerrc + |
|
3795 adapter->stats.crcerrs + adapter->stats.algnerrc + |
|
3796 adapter->stats.ruc + adapter->stats.roc + |
|
3797 adapter->stats.cexterr; |
|
3798 adapter->stats.rlerrc = adapter->stats.ruc + adapter->stats.roc; |
|
3799 netdev->stats.rx_length_errors = adapter->stats.rlerrc; |
|
3800 netdev->stats.rx_crc_errors = adapter->stats.crcerrs; |
|
3801 netdev->stats.rx_frame_errors = adapter->stats.algnerrc; |
|
3802 netdev->stats.rx_missed_errors = adapter->stats.mpc; |
|
3803 |
|
3804 /* Tx Errors */ |
|
3805 adapter->stats.txerrc = adapter->stats.ecol + adapter->stats.latecol; |
|
3806 netdev->stats.tx_errors = adapter->stats.txerrc; |
|
3807 netdev->stats.tx_aborted_errors = adapter->stats.ecol; |
|
3808 netdev->stats.tx_window_errors = adapter->stats.latecol; |
|
3809 netdev->stats.tx_carrier_errors = adapter->stats.tncrs; |
|
3810 if (hw->bad_tx_carr_stats_fd && |
|
3811 adapter->link_duplex == FULL_DUPLEX) { |
|
3812 netdev->stats.tx_carrier_errors = 0; |
|
3813 adapter->stats.tncrs = 0; |
|
3814 } |
|
3815 |
|
3816 /* Tx Dropped needs to be maintained elsewhere */ |
|
3817 |
|
3818 /* Phy Stats */ |
|
3819 if (hw->media_type == e1000_media_type_copper) { |
|
3820 if ((adapter->link_speed == SPEED_1000) && |
|
3821 (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) { |
|
3822 phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK; |
|
3823 adapter->phy_stats.idle_errors += phy_tmp; |
|
3824 } |
|
3825 |
|
3826 if ((hw->mac_type <= e1000_82546) && |
|
3827 (hw->phy_type == e1000_phy_m88) && |
|
3828 !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp)) |
|
3829 adapter->phy_stats.receive_errors += phy_tmp; |
|
3830 } |
|
3831 |
|
3832 /* Management Stats */ |
|
3833 if (hw->has_smbus) { |
|
3834 adapter->stats.mgptc += er32(MGTPTC); |
|
3835 adapter->stats.mgprc += er32(MGTPRC); |
|
3836 adapter->stats.mgpdc += er32(MGTPDC); |
|
3837 } |
|
3838 |
|
3839 if (!adapter->ecdev) { |
|
3840 spin_unlock_irqrestore(&adapter->stats_lock, flags); |
|
3841 } |
|
3842 } |
|
3843 |
|
3844 void ec_poll(struct net_device *netdev) |
|
3845 { |
|
3846 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
3847 if (jiffies - adapter->ec_watchdog_jiffies >= 2 * HZ) { |
|
3848 e1000_watchdog(&adapter->watchdog_task.work); |
|
3849 adapter->ec_watchdog_jiffies = jiffies; |
|
3850 } |
|
3851 |
|
3852 e1000_intr(0, netdev); |
|
3853 } |
|
3854 |
|
3855 /** |
|
3856 * e1000_intr - Interrupt Handler |
|
3857 * @irq: interrupt number |
|
3858 * @data: pointer to a network interface device structure |
|
3859 **/ |
|
3860 |
|
3861 static irqreturn_t e1000_intr(int irq, void *data) |
|
3862 { |
|
3863 struct net_device *netdev = data; |
|
3864 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
3865 struct e1000_hw *hw = &adapter->hw; |
|
3866 u32 icr = er32(ICR); |
|
3867 |
|
3868 if (unlikely((!icr))) |
|
3869 return IRQ_NONE; /* Not our interrupt */ |
|
3870 |
|
3871 /* |
|
3872 * we might have caused the interrupt, but the above |
|
3873 * read cleared it, and just in case the driver is |
|
3874 * down there is nothing to do so return handled |
|
3875 */ |
|
3876 if (unlikely(test_bit(__E1000_DOWN, &adapter->flags))) |
|
3877 return IRQ_HANDLED; |
|
3878 |
|
3879 if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) { |
|
3880 hw->get_link_status = 1; |
|
3881 /* guard against interrupt when we're going down */ |
|
3882 if (!adapter->ecdev && !test_bit(__E1000_DOWN, &adapter->flags)) |
|
3883 schedule_delayed_work(&adapter->watchdog_task, 1); |
|
3884 } |
|
3885 |
|
3886 if (adapter->ecdev) { |
|
3887 int i, ec_work_done = 0; |
|
3888 for (i = 0; i < E1000_MAX_INTR; i++) { |
|
3889 if (unlikely(!adapter->clean_rx(adapter, adapter->rx_ring, |
|
3890 &ec_work_done, 100) && |
|
3891 !e1000_clean_tx_irq(adapter, adapter->tx_ring))) { |
|
3892 break; |
|
3893 } |
|
3894 } |
|
3895 } else { |
|
3896 /* disable interrupts, without the synchronize_irq bit */ |
|
3897 ew32(IMC, ~0); |
|
3898 E1000_WRITE_FLUSH(); |
|
3899 |
|
3900 if (likely(napi_schedule_prep(&adapter->napi))) { |
|
3901 adapter->total_tx_bytes = 0; |
|
3902 adapter->total_tx_packets = 0; |
|
3903 adapter->total_rx_bytes = 0; |
|
3904 adapter->total_rx_packets = 0; |
|
3905 __napi_schedule(&adapter->napi); |
|
3906 } else { |
|
3907 /* this really should not happen! if it does it is basically a |
|
3908 * bug, but not a hard error, so enable ints and continue */ |
|
3909 if (!test_bit(__E1000_DOWN, &adapter->flags)) |
|
3910 e1000_irq_enable(adapter); |
|
3911 } |
|
3912 } |
|
3913 |
|
3914 return IRQ_HANDLED; |
|
3915 } |
|
3916 |
|
3917 /** |
|
3918 * e1000_clean - NAPI Rx polling callback |
|
3919 * @adapter: board private structure |
|
3920 * EtherCAT: never called |
|
3921 **/ |
|
3922 static int e1000_clean(struct napi_struct *napi, int budget) |
|
3923 { |
|
3924 struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, napi); |
|
3925 int tx_clean_complete = 0, work_done = 0; |
|
3926 |
|
3927 tx_clean_complete = e1000_clean_tx_irq(adapter, &adapter->tx_ring[0]); |
|
3928 |
|
3929 adapter->clean_rx(adapter, &adapter->rx_ring[0], &work_done, budget); |
|
3930 |
|
3931 if (!tx_clean_complete) |
|
3932 work_done = budget; |
|
3933 |
|
3934 /* If budget not fully consumed, exit the polling mode */ |
|
3935 if (work_done < budget) { |
|
3936 if (likely(adapter->itr_setting & 3)) |
|
3937 e1000_set_itr(adapter); |
|
3938 napi_complete(napi); |
|
3939 if (!test_bit(__E1000_DOWN, &adapter->flags)) |
|
3940 e1000_irq_enable(adapter); |
|
3941 } |
|
3942 |
|
3943 return work_done; |
|
3944 } |
|
3945 |
|
3946 /** |
|
3947 * e1000_clean_tx_irq - Reclaim resources after transmit completes |
|
3948 * @adapter: board private structure |
|
3949 **/ |
|
3950 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter, |
|
3951 struct e1000_tx_ring *tx_ring) |
|
3952 { |
|
3953 struct e1000_hw *hw = &adapter->hw; |
|
3954 struct net_device *netdev = adapter->netdev; |
|
3955 struct e1000_tx_desc *tx_desc, *eop_desc; |
|
3956 struct e1000_buffer *buffer_info; |
|
3957 unsigned int i, eop; |
|
3958 unsigned int count = 0; |
|
3959 unsigned int total_tx_bytes=0, total_tx_packets=0; |
|
3960 |
|
3961 i = tx_ring->next_to_clean; |
|
3962 eop = tx_ring->buffer_info[i].next_to_watch; |
|
3963 eop_desc = E1000_TX_DESC(*tx_ring, eop); |
|
3964 |
|
3965 while ((eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) && |
|
3966 (count < tx_ring->count)) { |
|
3967 bool cleaned = false; |
|
3968 rmb(); /* read buffer_info after eop_desc */ |
|
3969 for ( ; !cleaned; count++) { |
|
3970 tx_desc = E1000_TX_DESC(*tx_ring, i); |
|
3971 buffer_info = &tx_ring->buffer_info[i]; |
|
3972 cleaned = (i == eop); |
|
3973 |
|
3974 if (cleaned) { |
|
3975 total_tx_packets += buffer_info->segs; |
|
3976 total_tx_bytes += buffer_info->bytecount; |
|
3977 } |
|
3978 e1000_unmap_and_free_tx_resource(adapter, buffer_info); |
|
3979 tx_desc->upper.data = 0; |
|
3980 |
|
3981 if (unlikely(++i == tx_ring->count)) i = 0; |
|
3982 } |
|
3983 |
|
3984 eop = tx_ring->buffer_info[i].next_to_watch; |
|
3985 eop_desc = E1000_TX_DESC(*tx_ring, eop); |
|
3986 } |
|
3987 |
|
3988 tx_ring->next_to_clean = i; |
|
3989 |
|
3990 #define TX_WAKE_THRESHOLD 32 |
|
3991 if (!adapter->ecdev && unlikely(count && netif_carrier_ok(netdev) && |
|
3992 E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) { |
|
3993 /* Make sure that anybody stopping the queue after this |
|
3994 * sees the new next_to_clean. |
|
3995 */ |
|
3996 smp_mb(); |
|
3997 |
|
3998 if (netif_queue_stopped(netdev) && |
|
3999 !(test_bit(__E1000_DOWN, &adapter->flags))) { |
|
4000 netif_wake_queue(netdev); |
|
4001 ++adapter->restart_queue; |
|
4002 } |
|
4003 } |
|
4004 |
|
4005 if (!adapter->ecdev && adapter->detect_tx_hung) { |
|
4006 /* Detect a transmit hang in hardware, this serializes the |
|
4007 * check with the clearing of time_stamp and movement of i */ |
|
4008 adapter->detect_tx_hung = false; |
|
4009 if (tx_ring->buffer_info[eop].time_stamp && |
|
4010 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp + |
|
4011 (adapter->tx_timeout_factor * HZ)) && |
|
4012 !(er32(STATUS) & E1000_STATUS_TXOFF)) { |
|
4013 |
|
4014 /* detected Tx unit hang */ |
|
4015 e_err(drv, "Detected Tx Unit Hang\n" |
|
4016 " Tx Queue <%lu>\n" |
|
4017 " TDH <%x>\n" |
|
4018 " TDT <%x>\n" |
|
4019 " next_to_use <%x>\n" |
|
4020 " next_to_clean <%x>\n" |
|
4021 "buffer_info[next_to_clean]\n" |
|
4022 " time_stamp <%lx>\n" |
|
4023 " next_to_watch <%x>\n" |
|
4024 " jiffies <%lx>\n" |
|
4025 " next_to_watch.status <%x>\n", |
|
4026 (unsigned long)((tx_ring - adapter->tx_ring) / |
|
4027 sizeof(struct e1000_tx_ring)), |
|
4028 readl(hw->hw_addr + tx_ring->tdh), |
|
4029 readl(hw->hw_addr + tx_ring->tdt), |
|
4030 tx_ring->next_to_use, |
|
4031 tx_ring->next_to_clean, |
|
4032 tx_ring->buffer_info[eop].time_stamp, |
|
4033 eop, |
|
4034 jiffies, |
|
4035 eop_desc->upper.fields.status); |
|
4036 e1000_dump(adapter); |
|
4037 netif_stop_queue(netdev); |
|
4038 } |
|
4039 } |
|
4040 adapter->total_tx_bytes += total_tx_bytes; |
|
4041 adapter->total_tx_packets += total_tx_packets; |
|
4042 netdev->stats.tx_bytes += total_tx_bytes; |
|
4043 netdev->stats.tx_packets += total_tx_packets; |
|
4044 return count < tx_ring->count; |
|
4045 } |
|
4046 |
|
4047 /** |
|
4048 * e1000_rx_checksum - Receive Checksum Offload for 82543 |
|
4049 * @adapter: board private structure |
|
4050 * @status_err: receive descriptor status and error fields |
|
4051 * @csum: receive descriptor csum field |
|
4052 * @sk_buff: socket buffer with received data |
|
4053 **/ |
|
4054 |
|
4055 static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err, |
|
4056 u32 csum, struct sk_buff *skb) |
|
4057 { |
|
4058 struct e1000_hw *hw = &adapter->hw; |
|
4059 u16 status = (u16)status_err; |
|
4060 u8 errors = (u8)(status_err >> 24); |
|
4061 |
|
4062 skb_checksum_none_assert(skb); |
|
4063 |
|
4064 /* 82543 or newer only */ |
|
4065 if (unlikely(hw->mac_type < e1000_82543)) return; |
|
4066 /* Ignore Checksum bit is set */ |
|
4067 if (unlikely(status & E1000_RXD_STAT_IXSM)) return; |
|
4068 /* TCP/UDP checksum error bit is set */ |
|
4069 if (unlikely(errors & E1000_RXD_ERR_TCPE)) { |
|
4070 /* let the stack verify checksum errors */ |
|
4071 adapter->hw_csum_err++; |
|
4072 return; |
|
4073 } |
|
4074 /* TCP/UDP Checksum has not been calculated */ |
|
4075 if (!(status & E1000_RXD_STAT_TCPCS)) |
|
4076 return; |
|
4077 |
|
4078 /* It must be a TCP or UDP packet with a valid checksum */ |
|
4079 if (likely(status & E1000_RXD_STAT_TCPCS)) { |
|
4080 /* TCP checksum is good */ |
|
4081 skb->ip_summed = CHECKSUM_UNNECESSARY; |
|
4082 } |
|
4083 adapter->hw_csum_good++; |
|
4084 } |
|
4085 |
|
4086 /** |
|
4087 * e1000_consume_page - helper function |
|
4088 **/ |
|
4089 static void e1000_consume_page(struct e1000_buffer *bi, struct sk_buff *skb, |
|
4090 u16 length) |
|
4091 { |
|
4092 bi->page = NULL; |
|
4093 skb->len += length; |
|
4094 skb->data_len += length; |
|
4095 skb->truesize += PAGE_SIZE; |
|
4096 } |
|
4097 |
|
4098 /** |
|
4099 * e1000_receive_skb - helper function to handle rx indications |
|
4100 * @adapter: board private structure |
|
4101 * @status: descriptor status field as written by hardware |
|
4102 * @vlan: descriptor vlan field as written by hardware (no le/be conversion) |
|
4103 * @skb: pointer to sk_buff to be indicated to stack |
|
4104 */ |
|
4105 static void e1000_receive_skb(struct e1000_adapter *adapter, u8 status, |
|
4106 __le16 vlan, struct sk_buff *skb) |
|
4107 { |
|
4108 skb->protocol = eth_type_trans(skb, adapter->netdev); |
|
4109 |
|
4110 if (status & E1000_RXD_STAT_VP) { |
|
4111 u16 vid = le16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK; |
|
4112 |
|
4113 __vlan_hwaccel_put_tag(skb, vid); |
|
4114 } |
|
4115 napi_gro_receive(&adapter->napi, skb); |
|
4116 } |
|
4117 |
|
4118 /** |
|
4119 * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy |
|
4120 * @adapter: board private structure |
|
4121 * @rx_ring: ring to clean |
|
4122 * @work_done: amount of napi work completed this call |
|
4123 * @work_to_do: max amount of work allowed for this call to do |
|
4124 * |
|
4125 * the return value indicates whether actual cleaning was done, there |
|
4126 * is no guarantee that everything was cleaned |
|
4127 */ |
|
4128 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter, |
|
4129 struct e1000_rx_ring *rx_ring, |
|
4130 int *work_done, int work_to_do) |
|
4131 { |
|
4132 struct e1000_hw *hw = &adapter->hw; |
|
4133 struct net_device *netdev = adapter->netdev; |
|
4134 struct pci_dev *pdev = adapter->pdev; |
|
4135 struct e1000_rx_desc *rx_desc, *next_rxd; |
|
4136 struct e1000_buffer *buffer_info, *next_buffer; |
|
4137 unsigned long irq_flags; |
|
4138 u32 length; |
|
4139 unsigned int i; |
|
4140 int cleaned_count = 0; |
|
4141 bool cleaned = false; |
|
4142 unsigned int total_rx_bytes=0, total_rx_packets=0; |
|
4143 |
|
4144 i = rx_ring->next_to_clean; |
|
4145 rx_desc = E1000_RX_DESC(*rx_ring, i); |
|
4146 buffer_info = &rx_ring->buffer_info[i]; |
|
4147 |
|
4148 while (rx_desc->status & E1000_RXD_STAT_DD) { |
|
4149 struct sk_buff *skb; |
|
4150 u8 status; |
|
4151 |
|
4152 if (*work_done >= work_to_do) |
|
4153 break; |
|
4154 (*work_done)++; |
|
4155 rmb(); /* read descriptor and rx_buffer_info after status DD */ |
|
4156 |
|
4157 status = rx_desc->status; |
|
4158 skb = buffer_info->skb; |
|
4159 if (!adapter->ecdev) { |
|
4160 buffer_info->skb = NULL; |
|
4161 } |
|
4162 |
|
4163 if (++i == rx_ring->count) i = 0; |
|
4164 next_rxd = E1000_RX_DESC(*rx_ring, i); |
|
4165 prefetch(next_rxd); |
|
4166 |
|
4167 next_buffer = &rx_ring->buffer_info[i]; |
|
4168 |
|
4169 cleaned = true; |
|
4170 cleaned_count++; |
|
4171 dma_unmap_page(&pdev->dev, buffer_info->dma, |
|
4172 buffer_info->length, DMA_FROM_DEVICE); |
|
4173 buffer_info->dma = 0; |
|
4174 |
|
4175 length = le16_to_cpu(rx_desc->length); |
|
4176 |
|
4177 /* errors is only valid for DD + EOP descriptors */ |
|
4178 if (!adapter->ecdev && |
|
4179 unlikely((status & E1000_RXD_STAT_EOP) && |
|
4180 (rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK))) { |
|
4181 u8 last_byte = *(skb->data + length - 1); |
|
4182 if (TBI_ACCEPT(hw, status, rx_desc->errors, length, |
|
4183 last_byte)) { |
|
4184 spin_lock_irqsave(&adapter->stats_lock, |
|
4185 irq_flags); |
|
4186 e1000_tbi_adjust_stats(hw, &adapter->stats, |
|
4187 length, skb->data); |
|
4188 spin_unlock_irqrestore(&adapter->stats_lock, |
|
4189 irq_flags); |
|
4190 length--; |
|
4191 } else { |
|
4192 /* recycle both page and skb */ |
|
4193 buffer_info->skb = skb; |
|
4194 /* an error means any chain goes out the window |
|
4195 * too */ |
|
4196 if (rx_ring->rx_skb_top) |
|
4197 dev_kfree_skb(rx_ring->rx_skb_top); |
|
4198 rx_ring->rx_skb_top = NULL; |
|
4199 goto next_desc; |
|
4200 } |
|
4201 } |
|
4202 |
|
4203 #define rxtop rx_ring->rx_skb_top |
|
4204 if (!(status & E1000_RXD_STAT_EOP)) { |
|
4205 /* this descriptor is only the beginning (or middle) */ |
|
4206 if (!rxtop) { |
|
4207 /* this is the beginning of a chain */ |
|
4208 rxtop = skb; |
|
4209 skb_fill_page_desc(rxtop, 0, buffer_info->page, |
|
4210 0, length); |
|
4211 } else { |
|
4212 /* this is the middle of a chain */ |
|
4213 skb_fill_page_desc(rxtop, |
|
4214 skb_shinfo(rxtop)->nr_frags, |
|
4215 buffer_info->page, 0, length); |
|
4216 /* re-use the skb, only consumed the page */ |
|
4217 buffer_info->skb = skb; |
|
4218 } |
|
4219 e1000_consume_page(buffer_info, rxtop, length); |
|
4220 goto next_desc; |
|
4221 } else { |
|
4222 if (rxtop) { |
|
4223 /* end of the chain */ |
|
4224 skb_fill_page_desc(rxtop, |
|
4225 skb_shinfo(rxtop)->nr_frags, |
|
4226 buffer_info->page, 0, length); |
|
4227 /* re-use the current skb, we only consumed the |
|
4228 * page */ |
|
4229 buffer_info->skb = skb; |
|
4230 skb = rxtop; |
|
4231 rxtop = NULL; |
|
4232 e1000_consume_page(buffer_info, skb, length); |
|
4233 } else { |
|
4234 /* no chain, got EOP, this buf is the packet |
|
4235 * copybreak to save the put_page/alloc_page */ |
|
4236 if (length <= copybreak && |
|
4237 skb_tailroom(skb) >= length) { |
|
4238 u8 *vaddr; |
|
4239 vaddr = kmap_atomic(buffer_info->page); |
|
4240 memcpy(skb_tail_pointer(skb), vaddr, length); |
|
4241 kunmap_atomic(vaddr); |
|
4242 /* re-use the page, so don't erase |
|
4243 * buffer_info->page */ |
|
4244 skb_put(skb, length); |
|
4245 } else { |
|
4246 skb_fill_page_desc(skb, 0, |
|
4247 buffer_info->page, 0, |
|
4248 length); |
|
4249 e1000_consume_page(buffer_info, skb, |
|
4250 length); |
|
4251 } |
|
4252 } |
|
4253 } |
|
4254 |
|
4255 /* Receive Checksum Offload XXX recompute due to CRC strip? */ |
|
4256 e1000_rx_checksum(adapter, |
|
4257 (u32)(status) | |
|
4258 ((u32)(rx_desc->errors) << 24), |
|
4259 le16_to_cpu(rx_desc->csum), skb); |
|
4260 |
|
4261 total_rx_bytes += (skb->len - 4); /* don't count FCS */ |
|
4262 if (likely(!(netdev->features & NETIF_F_RXFCS))) |
|
4263 pskb_trim(skb, skb->len - 4); |
|
4264 total_rx_packets++; |
|
4265 |
|
4266 /* eth type trans needs skb->data to point to something */ |
|
4267 if (!pskb_may_pull(skb, ETH_HLEN)) { |
|
4268 e_err(drv, "pskb_may_pull failed.\n"); |
|
4269 if (!adapter->ecdev) { |
|
4270 dev_kfree_skb(skb); |
|
4271 } |
|
4272 goto next_desc; |
|
4273 } |
|
4274 |
|
4275 if (adapter->ecdev) { |
|
4276 ecdev_receive(adapter->ecdev, skb->data, length); |
|
4277 |
|
4278 // No need to detect link status as |
|
4279 // long as frames are received: Reset watchdog. |
|
4280 adapter->ec_watchdog_jiffies = jiffies; |
|
4281 } else { |
|
4282 e1000_receive_skb(adapter, status, rx_desc->special, skb); |
|
4283 } |
|
4284 |
|
4285 next_desc: |
|
4286 rx_desc->status = 0; |
|
4287 |
|
4288 /* return some buffers to hardware, one at a time is too slow */ |
|
4289 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) { |
|
4290 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count); |
|
4291 cleaned_count = 0; |
|
4292 } |
|
4293 |
|
4294 /* use prefetched values */ |
|
4295 rx_desc = next_rxd; |
|
4296 buffer_info = next_buffer; |
|
4297 } |
|
4298 rx_ring->next_to_clean = i; |
|
4299 |
|
4300 cleaned_count = E1000_DESC_UNUSED(rx_ring); |
|
4301 if (cleaned_count) |
|
4302 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count); |
|
4303 |
|
4304 adapter->total_rx_packets += total_rx_packets; |
|
4305 adapter->total_rx_bytes += total_rx_bytes; |
|
4306 netdev->stats.rx_bytes += total_rx_bytes; |
|
4307 netdev->stats.rx_packets += total_rx_packets; |
|
4308 return cleaned; |
|
4309 } |
|
4310 |
|
4311 /* |
|
4312 * this should improve performance for small packets with large amounts |
|
4313 * of reassembly being done in the stack |
|
4314 */ |
|
4315 static void e1000_check_copybreak(struct net_device *netdev, |
|
4316 struct e1000_buffer *buffer_info, |
|
4317 u32 length, struct sk_buff **skb) |
|
4318 { |
|
4319 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
4320 struct sk_buff *new_skb; |
|
4321 |
|
4322 if (adapter->ecdev || length > copybreak) |
|
4323 return; |
|
4324 |
|
4325 new_skb = netdev_alloc_skb_ip_align(netdev, length); |
|
4326 if (!new_skb) |
|
4327 return; |
|
4328 |
|
4329 skb_copy_to_linear_data_offset(new_skb, -NET_IP_ALIGN, |
|
4330 (*skb)->data - NET_IP_ALIGN, |
|
4331 length + NET_IP_ALIGN); |
|
4332 /* save the skb in buffer_info as good */ |
|
4333 buffer_info->skb = *skb; |
|
4334 *skb = new_skb; |
|
4335 } |
|
4336 |
|
4337 /** |
|
4338 * e1000_clean_rx_irq - Send received data up the network stack; legacy |
|
4339 * @adapter: board private structure |
|
4340 * @rx_ring: ring to clean |
|
4341 * @work_done: amount of napi work completed this call |
|
4342 * @work_to_do: max amount of work allowed for this call to do |
|
4343 */ |
|
4344 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter, |
|
4345 struct e1000_rx_ring *rx_ring, |
|
4346 int *work_done, int work_to_do) |
|
4347 { |
|
4348 struct e1000_hw *hw = &adapter->hw; |
|
4349 struct net_device *netdev = adapter->netdev; |
|
4350 struct pci_dev *pdev = adapter->pdev; |
|
4351 struct e1000_rx_desc *rx_desc, *next_rxd; |
|
4352 struct e1000_buffer *buffer_info, *next_buffer; |
|
4353 unsigned long flags; |
|
4354 u32 length; |
|
4355 unsigned int i; |
|
4356 int cleaned_count = 0; |
|
4357 bool cleaned = false; |
|
4358 unsigned int total_rx_bytes=0, total_rx_packets=0; |
|
4359 |
|
4360 i = rx_ring->next_to_clean; |
|
4361 rx_desc = E1000_RX_DESC(*rx_ring, i); |
|
4362 buffer_info = &rx_ring->buffer_info[i]; |
|
4363 |
|
4364 while (rx_desc->status & E1000_RXD_STAT_DD) { |
|
4365 struct sk_buff *skb; |
|
4366 u8 status; |
|
4367 |
|
4368 if (*work_done >= work_to_do) |
|
4369 break; |
|
4370 (*work_done)++; |
|
4371 rmb(); /* read descriptor and rx_buffer_info after status DD */ |
|
4372 |
|
4373 status = rx_desc->status; |
|
4374 skb = buffer_info->skb; |
|
4375 if (!adapter->ecdev) { |
|
4376 buffer_info->skb = NULL; |
|
4377 } |
|
4378 |
|
4379 prefetch(skb->data - NET_IP_ALIGN); |
|
4380 |
|
4381 if (++i == rx_ring->count) i = 0; |
|
4382 next_rxd = E1000_RX_DESC(*rx_ring, i); |
|
4383 prefetch(next_rxd); |
|
4384 |
|
4385 next_buffer = &rx_ring->buffer_info[i]; |
|
4386 |
|
4387 cleaned = true; |
|
4388 cleaned_count++; |
|
4389 dma_unmap_single(&pdev->dev, buffer_info->dma, |
|
4390 buffer_info->length, DMA_FROM_DEVICE); |
|
4391 buffer_info->dma = 0; |
|
4392 |
|
4393 length = le16_to_cpu(rx_desc->length); |
|
4394 /* !EOP means multiple descriptors were used to store a single |
|
4395 * packet, if thats the case we need to toss it. In fact, we |
|
4396 * to toss every packet with the EOP bit clear and the next |
|
4397 * frame that _does_ have the EOP bit set, as it is by |
|
4398 * definition only a frame fragment |
|
4399 */ |
|
4400 if (unlikely(!(status & E1000_RXD_STAT_EOP))) |
|
4401 adapter->discarding = true; |
|
4402 |
|
4403 if (adapter->discarding) { |
|
4404 /* All receives must fit into a single buffer */ |
|
4405 e_dbg("Receive packet consumed multiple buffers\n"); |
|
4406 /* recycle */ |
|
4407 buffer_info->skb = skb; |
|
4408 if (status & E1000_RXD_STAT_EOP) |
|
4409 adapter->discarding = false; |
|
4410 goto next_desc; |
|
4411 } |
|
4412 |
|
4413 if (!adapter->ecdev && |
|
4414 unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) { |
|
4415 u8 last_byte = *(skb->data + length - 1); |
|
4416 if (TBI_ACCEPT(hw, status, rx_desc->errors, length, |
|
4417 last_byte)) { |
|
4418 spin_lock_irqsave(&adapter->stats_lock, flags); |
|
4419 e1000_tbi_adjust_stats(hw, &adapter->stats, |
|
4420 length, skb->data); |
|
4421 spin_unlock_irqrestore(&adapter->stats_lock, |
|
4422 flags); |
|
4423 length--; |
|
4424 } else { |
|
4425 /* recycle */ |
|
4426 buffer_info->skb = skb; |
|
4427 goto next_desc; |
|
4428 } |
|
4429 } |
|
4430 |
|
4431 total_rx_bytes += (length - 4); /* don't count FCS */ |
|
4432 total_rx_packets++; |
|
4433 |
|
4434 if (likely(!(netdev->features & NETIF_F_RXFCS))) |
|
4435 /* adjust length to remove Ethernet CRC, this must be |
|
4436 * done after the TBI_ACCEPT workaround above |
|
4437 */ |
|
4438 length -= 4; |
|
4439 |
|
4440 e1000_check_copybreak(netdev, buffer_info, length, &skb); |
|
4441 |
|
4442 skb_put(skb, length); |
|
4443 |
|
4444 /* Receive Checksum Offload */ |
|
4445 e1000_rx_checksum(adapter, |
|
4446 (u32)(status) | |
|
4447 ((u32)(rx_desc->errors) << 24), |
|
4448 le16_to_cpu(rx_desc->csum), skb); |
|
4449 |
|
4450 if (adapter->ecdev) { |
|
4451 ecdev_receive(adapter->ecdev, skb->data, length); |
|
4452 |
|
4453 // No need to detect link status as |
|
4454 // long as frames are received: Reset watchdog. |
|
4455 adapter->ec_watchdog_jiffies = jiffies; |
|
4456 } else { |
|
4457 e1000_receive_skb(adapter, status, rx_desc->special, skb); |
|
4458 } |
|
4459 |
|
4460 next_desc: |
|
4461 rx_desc->status = 0; |
|
4462 |
|
4463 /* return some buffers to hardware, one at a time is too slow */ |
|
4464 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) { |
|
4465 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count); |
|
4466 cleaned_count = 0; |
|
4467 } |
|
4468 |
|
4469 /* use prefetched values */ |
|
4470 rx_desc = next_rxd; |
|
4471 buffer_info = next_buffer; |
|
4472 } |
|
4473 rx_ring->next_to_clean = i; |
|
4474 |
|
4475 cleaned_count = E1000_DESC_UNUSED(rx_ring); |
|
4476 if (cleaned_count) |
|
4477 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count); |
|
4478 |
|
4479 adapter->total_rx_packets += total_rx_packets; |
|
4480 adapter->total_rx_bytes += total_rx_bytes; |
|
4481 netdev->stats.rx_bytes += total_rx_bytes; |
|
4482 netdev->stats.rx_packets += total_rx_packets; |
|
4483 return cleaned; |
|
4484 } |
|
4485 |
|
4486 /** |
|
4487 * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers |
|
4488 * @adapter: address of board private structure |
|
4489 * @rx_ring: pointer to receive ring structure |
|
4490 * @cleaned_count: number of buffers to allocate this pass |
|
4491 **/ |
|
4492 |
|
4493 static void |
|
4494 e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter, |
|
4495 struct e1000_rx_ring *rx_ring, int cleaned_count) |
|
4496 { |
|
4497 struct net_device *netdev = adapter->netdev; |
|
4498 struct pci_dev *pdev = adapter->pdev; |
|
4499 struct e1000_rx_desc *rx_desc; |
|
4500 struct e1000_buffer *buffer_info; |
|
4501 struct sk_buff *skb; |
|
4502 unsigned int i; |
|
4503 unsigned int bufsz = 256 - 16 /*for skb_reserve */ ; |
|
4504 |
|
4505 i = rx_ring->next_to_use; |
|
4506 buffer_info = &rx_ring->buffer_info[i]; |
|
4507 |
|
4508 while (cleaned_count--) { |
|
4509 skb = buffer_info->skb; |
|
4510 if (skb) { |
|
4511 skb_trim(skb, 0); |
|
4512 goto check_page; |
|
4513 } |
|
4514 |
|
4515 skb = netdev_alloc_skb_ip_align(netdev, bufsz); |
|
4516 if (unlikely(!skb)) { |
|
4517 /* Better luck next round */ |
|
4518 adapter->alloc_rx_buff_failed++; |
|
4519 break; |
|
4520 } |
|
4521 |
|
4522 /* Fix for errata 23, can't cross 64kB boundary */ |
|
4523 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) { |
|
4524 struct sk_buff *oldskb = skb; |
|
4525 e_err(rx_err, "skb align check failed: %u bytes at " |
|
4526 "%p\n", bufsz, skb->data); |
|
4527 /* Try again, without freeing the previous */ |
|
4528 skb = netdev_alloc_skb_ip_align(netdev, bufsz); |
|
4529 /* Failed allocation, critical failure */ |
|
4530 if (!skb) { |
|
4531 dev_kfree_skb(oldskb); |
|
4532 adapter->alloc_rx_buff_failed++; |
|
4533 break; |
|
4534 } |
|
4535 |
|
4536 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) { |
|
4537 /* give up */ |
|
4538 dev_kfree_skb(skb); |
|
4539 dev_kfree_skb(oldskb); |
|
4540 break; /* while (cleaned_count--) */ |
|
4541 } |
|
4542 |
|
4543 /* Use new allocation */ |
|
4544 dev_kfree_skb(oldskb); |
|
4545 } |
|
4546 buffer_info->skb = skb; |
|
4547 buffer_info->length = adapter->rx_buffer_len; |
|
4548 check_page: |
|
4549 /* allocate a new page if necessary */ |
|
4550 if (!buffer_info->page) { |
|
4551 buffer_info->page = alloc_page(GFP_ATOMIC); |
|
4552 if (unlikely(!buffer_info->page)) { |
|
4553 adapter->alloc_rx_buff_failed++; |
|
4554 break; |
|
4555 } |
|
4556 } |
|
4557 |
|
4558 if (!buffer_info->dma) { |
|
4559 buffer_info->dma = dma_map_page(&pdev->dev, |
|
4560 buffer_info->page, 0, |
|
4561 buffer_info->length, |
|
4562 DMA_FROM_DEVICE); |
|
4563 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) { |
|
4564 put_page(buffer_info->page); |
|
4565 dev_kfree_skb(skb); |
|
4566 buffer_info->page = NULL; |
|
4567 buffer_info->skb = NULL; |
|
4568 buffer_info->dma = 0; |
|
4569 adapter->alloc_rx_buff_failed++; |
|
4570 break; /* while !buffer_info->skb */ |
|
4571 } |
|
4572 } |
|
4573 |
|
4574 rx_desc = E1000_RX_DESC(*rx_ring, i); |
|
4575 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma); |
|
4576 |
|
4577 if (unlikely(++i == rx_ring->count)) |
|
4578 i = 0; |
|
4579 buffer_info = &rx_ring->buffer_info[i]; |
|
4580 } |
|
4581 |
|
4582 if (likely(rx_ring->next_to_use != i)) { |
|
4583 rx_ring->next_to_use = i; |
|
4584 if (unlikely(i-- == 0)) |
|
4585 i = (rx_ring->count - 1); |
|
4586 |
|
4587 /* Force memory writes to complete before letting h/w |
|
4588 * know there are new descriptors to fetch. (Only |
|
4589 * applicable for weak-ordered memory model archs, |
|
4590 * such as IA-64). */ |
|
4591 wmb(); |
|
4592 writel(i, adapter->hw.hw_addr + rx_ring->rdt); |
|
4593 } |
|
4594 } |
|
4595 |
|
4596 /** |
|
4597 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended |
|
4598 * @adapter: address of board private structure |
|
4599 **/ |
|
4600 |
|
4601 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter, |
|
4602 struct e1000_rx_ring *rx_ring, |
|
4603 int cleaned_count) |
|
4604 { |
|
4605 struct e1000_hw *hw = &adapter->hw; |
|
4606 struct net_device *netdev = adapter->netdev; |
|
4607 struct pci_dev *pdev = adapter->pdev; |
|
4608 struct e1000_rx_desc *rx_desc; |
|
4609 struct e1000_buffer *buffer_info; |
|
4610 struct sk_buff *skb; |
|
4611 unsigned int i; |
|
4612 unsigned int bufsz = adapter->rx_buffer_len; |
|
4613 |
|
4614 i = rx_ring->next_to_use; |
|
4615 buffer_info = &rx_ring->buffer_info[i]; |
|
4616 |
|
4617 while (cleaned_count--) { |
|
4618 skb = buffer_info->skb; |
|
4619 if (skb) { |
|
4620 skb_trim(skb, 0); |
|
4621 goto map_skb; |
|
4622 } |
|
4623 |
|
4624 skb = netdev_alloc_skb_ip_align(netdev, bufsz); |
|
4625 if (unlikely(!skb)) { |
|
4626 /* Better luck next round */ |
|
4627 adapter->alloc_rx_buff_failed++; |
|
4628 break; |
|
4629 } |
|
4630 |
|
4631 /* Fix for errata 23, can't cross 64kB boundary */ |
|
4632 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) { |
|
4633 struct sk_buff *oldskb = skb; |
|
4634 e_err(rx_err, "skb align check failed: %u bytes at " |
|
4635 "%p\n", bufsz, skb->data); |
|
4636 /* Try again, without freeing the previous */ |
|
4637 skb = netdev_alloc_skb_ip_align(netdev, bufsz); |
|
4638 /* Failed allocation, critical failure */ |
|
4639 if (!skb) { |
|
4640 dev_kfree_skb(oldskb); |
|
4641 adapter->alloc_rx_buff_failed++; |
|
4642 break; |
|
4643 } |
|
4644 |
|
4645 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) { |
|
4646 /* give up */ |
|
4647 dev_kfree_skb(skb); |
|
4648 dev_kfree_skb(oldskb); |
|
4649 adapter->alloc_rx_buff_failed++; |
|
4650 break; /* while !buffer_info->skb */ |
|
4651 } |
|
4652 |
|
4653 /* Use new allocation */ |
|
4654 dev_kfree_skb(oldskb); |
|
4655 } |
|
4656 buffer_info->skb = skb; |
|
4657 buffer_info->length = adapter->rx_buffer_len; |
|
4658 map_skb: |
|
4659 buffer_info->dma = dma_map_single(&pdev->dev, |
|
4660 skb->data, |
|
4661 buffer_info->length, |
|
4662 DMA_FROM_DEVICE); |
|
4663 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) { |
|
4664 dev_kfree_skb(skb); |
|
4665 buffer_info->skb = NULL; |
|
4666 buffer_info->dma = 0; |
|
4667 adapter->alloc_rx_buff_failed++; |
|
4668 break; /* while !buffer_info->skb */ |
|
4669 } |
|
4670 |
|
4671 /* |
|
4672 * XXX if it was allocated cleanly it will never map to a |
|
4673 * boundary crossing |
|
4674 */ |
|
4675 |
|
4676 /* Fix for errata 23, can't cross 64kB boundary */ |
|
4677 if (!e1000_check_64k_bound(adapter, |
|
4678 (void *)(unsigned long)buffer_info->dma, |
|
4679 adapter->rx_buffer_len)) { |
|
4680 e_err(rx_err, "dma align check failed: %u bytes at " |
|
4681 "%p\n", adapter->rx_buffer_len, |
|
4682 (void *)(unsigned long)buffer_info->dma); |
|
4683 dev_kfree_skb(skb); |
|
4684 buffer_info->skb = NULL; |
|
4685 |
|
4686 dma_unmap_single(&pdev->dev, buffer_info->dma, |
|
4687 adapter->rx_buffer_len, |
|
4688 DMA_FROM_DEVICE); |
|
4689 buffer_info->dma = 0; |
|
4690 |
|
4691 adapter->alloc_rx_buff_failed++; |
|
4692 break; /* while !buffer_info->skb */ |
|
4693 } |
|
4694 rx_desc = E1000_RX_DESC(*rx_ring, i); |
|
4695 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma); |
|
4696 |
|
4697 if (unlikely(++i == rx_ring->count)) |
|
4698 i = 0; |
|
4699 buffer_info = &rx_ring->buffer_info[i]; |
|
4700 } |
|
4701 |
|
4702 if (likely(rx_ring->next_to_use != i)) { |
|
4703 rx_ring->next_to_use = i; |
|
4704 if (unlikely(i-- == 0)) |
|
4705 i = (rx_ring->count - 1); |
|
4706 |
|
4707 /* Force memory writes to complete before letting h/w |
|
4708 * know there are new descriptors to fetch. (Only |
|
4709 * applicable for weak-ordered memory model archs, |
|
4710 * such as IA-64). */ |
|
4711 wmb(); |
|
4712 writel(i, hw->hw_addr + rx_ring->rdt); |
|
4713 } |
|
4714 } |
|
4715 |
|
4716 /** |
|
4717 * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers. |
|
4718 * @adapter: |
|
4719 **/ |
|
4720 |
|
4721 static void e1000_smartspeed(struct e1000_adapter *adapter) |
|
4722 { |
|
4723 struct e1000_hw *hw = &adapter->hw; |
|
4724 u16 phy_status; |
|
4725 u16 phy_ctrl; |
|
4726 |
|
4727 if ((hw->phy_type != e1000_phy_igp) || !hw->autoneg || |
|
4728 !(hw->autoneg_advertised & ADVERTISE_1000_FULL)) |
|
4729 return; |
|
4730 |
|
4731 if (adapter->smartspeed == 0) { |
|
4732 /* If Master/Slave config fault is asserted twice, |
|
4733 * we assume back-to-back */ |
|
4734 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status); |
|
4735 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return; |
|
4736 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status); |
|
4737 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return; |
|
4738 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl); |
|
4739 if (phy_ctrl & CR_1000T_MS_ENABLE) { |
|
4740 phy_ctrl &= ~CR_1000T_MS_ENABLE; |
|
4741 e1000_write_phy_reg(hw, PHY_1000T_CTRL, |
|
4742 phy_ctrl); |
|
4743 adapter->smartspeed++; |
|
4744 if (!e1000_phy_setup_autoneg(hw) && |
|
4745 !e1000_read_phy_reg(hw, PHY_CTRL, |
|
4746 &phy_ctrl)) { |
|
4747 phy_ctrl |= (MII_CR_AUTO_NEG_EN | |
|
4748 MII_CR_RESTART_AUTO_NEG); |
|
4749 e1000_write_phy_reg(hw, PHY_CTRL, |
|
4750 phy_ctrl); |
|
4751 } |
|
4752 } |
|
4753 return; |
|
4754 } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) { |
|
4755 /* If still no link, perhaps using 2/3 pair cable */ |
|
4756 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl); |
|
4757 phy_ctrl |= CR_1000T_MS_ENABLE; |
|
4758 e1000_write_phy_reg(hw, PHY_1000T_CTRL, phy_ctrl); |
|
4759 if (!e1000_phy_setup_autoneg(hw) && |
|
4760 !e1000_read_phy_reg(hw, PHY_CTRL, &phy_ctrl)) { |
|
4761 phy_ctrl |= (MII_CR_AUTO_NEG_EN | |
|
4762 MII_CR_RESTART_AUTO_NEG); |
|
4763 e1000_write_phy_reg(hw, PHY_CTRL, phy_ctrl); |
|
4764 } |
|
4765 } |
|
4766 /* Restart process after E1000_SMARTSPEED_MAX iterations */ |
|
4767 if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX) |
|
4768 adapter->smartspeed = 0; |
|
4769 } |
|
4770 |
|
4771 /** |
|
4772 * e1000_ioctl - |
|
4773 * @netdev: |
|
4774 * @ifreq: |
|
4775 * @cmd: |
|
4776 **/ |
|
4777 |
|
4778 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) |
|
4779 { |
|
4780 switch (cmd) { |
|
4781 case SIOCGMIIPHY: |
|
4782 case SIOCGMIIREG: |
|
4783 case SIOCSMIIREG: |
|
4784 return e1000_mii_ioctl(netdev, ifr, cmd); |
|
4785 default: |
|
4786 return -EOPNOTSUPP; |
|
4787 } |
|
4788 } |
|
4789 |
|
4790 /** |
|
4791 * e1000_mii_ioctl - |
|
4792 * @netdev: |
|
4793 * @ifreq: |
|
4794 * @cmd: |
|
4795 **/ |
|
4796 |
|
4797 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, |
|
4798 int cmd) |
|
4799 { |
|
4800 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
4801 struct e1000_hw *hw = &adapter->hw; |
|
4802 struct mii_ioctl_data *data = if_mii(ifr); |
|
4803 int retval; |
|
4804 u16 mii_reg; |
|
4805 unsigned long flags; |
|
4806 |
|
4807 if (hw->media_type != e1000_media_type_copper) |
|
4808 return -EOPNOTSUPP; |
|
4809 |
|
4810 switch (cmd) { |
|
4811 case SIOCGMIIPHY: |
|
4812 data->phy_id = hw->phy_addr; |
|
4813 break; |
|
4814 case SIOCGMIIREG: |
|
4815 if (adapter->ecdev) { |
|
4816 return -EPERM; |
|
4817 } |
|
4818 spin_lock_irqsave(&adapter->stats_lock, flags); |
|
4819 if (e1000_read_phy_reg(hw, data->reg_num & 0x1F, |
|
4820 &data->val_out)) { |
|
4821 spin_unlock_irqrestore(&adapter->stats_lock, flags); |
|
4822 return -EIO; |
|
4823 } |
|
4824 spin_unlock_irqrestore(&adapter->stats_lock, flags); |
|
4825 break; |
|
4826 case SIOCSMIIREG: |
|
4827 if (adapter->ecdev) { |
|
4828 return -EPERM; |
|
4829 } |
|
4830 if (data->reg_num & ~(0x1F)) |
|
4831 return -EFAULT; |
|
4832 mii_reg = data->val_in; |
|
4833 spin_lock_irqsave(&adapter->stats_lock, flags); |
|
4834 if (e1000_write_phy_reg(hw, data->reg_num, |
|
4835 mii_reg)) { |
|
4836 spin_unlock_irqrestore(&adapter->stats_lock, flags); |
|
4837 return -EIO; |
|
4838 } |
|
4839 spin_unlock_irqrestore(&adapter->stats_lock, flags); |
|
4840 if (hw->media_type == e1000_media_type_copper) { |
|
4841 switch (data->reg_num) { |
|
4842 case PHY_CTRL: |
|
4843 if (mii_reg & MII_CR_POWER_DOWN) |
|
4844 break; |
|
4845 if (mii_reg & MII_CR_AUTO_NEG_EN) { |
|
4846 hw->autoneg = 1; |
|
4847 hw->autoneg_advertised = 0x2F; |
|
4848 } else { |
|
4849 u32 speed; |
|
4850 if (mii_reg & 0x40) |
|
4851 speed = SPEED_1000; |
|
4852 else if (mii_reg & 0x2000) |
|
4853 speed = SPEED_100; |
|
4854 else |
|
4855 speed = SPEED_10; |
|
4856 retval = e1000_set_spd_dplx( |
|
4857 adapter, speed, |
|
4858 ((mii_reg & 0x100) |
|
4859 ? DUPLEX_FULL : |
|
4860 DUPLEX_HALF)); |
|
4861 if (retval) |
|
4862 return retval; |
|
4863 } |
|
4864 if (netif_running(adapter->netdev)) |
|
4865 e1000_reinit_locked(adapter); |
|
4866 else |
|
4867 e1000_reset(adapter); |
|
4868 break; |
|
4869 case M88E1000_PHY_SPEC_CTRL: |
|
4870 case M88E1000_EXT_PHY_SPEC_CTRL: |
|
4871 if (e1000_phy_reset(hw)) |
|
4872 return -EIO; |
|
4873 break; |
|
4874 } |
|
4875 } else { |
|
4876 switch (data->reg_num) { |
|
4877 case PHY_CTRL: |
|
4878 if (mii_reg & MII_CR_POWER_DOWN) |
|
4879 break; |
|
4880 if (netif_running(adapter->netdev)) |
|
4881 e1000_reinit_locked(adapter); |
|
4882 else |
|
4883 e1000_reset(adapter); |
|
4884 break; |
|
4885 } |
|
4886 } |
|
4887 break; |
|
4888 default: |
|
4889 return -EOPNOTSUPP; |
|
4890 } |
|
4891 return E1000_SUCCESS; |
|
4892 } |
|
4893 |
|
4894 void e1000_pci_set_mwi(struct e1000_hw *hw) |
|
4895 { |
|
4896 struct e1000_adapter *adapter = hw->back; |
|
4897 int ret_val = pci_set_mwi(adapter->pdev); |
|
4898 |
|
4899 if (ret_val) |
|
4900 e_err(probe, "Error in setting MWI\n"); |
|
4901 } |
|
4902 |
|
4903 void e1000_pci_clear_mwi(struct e1000_hw *hw) |
|
4904 { |
|
4905 struct e1000_adapter *adapter = hw->back; |
|
4906 |
|
4907 pci_clear_mwi(adapter->pdev); |
|
4908 } |
|
4909 |
|
4910 int e1000_pcix_get_mmrbc(struct e1000_hw *hw) |
|
4911 { |
|
4912 struct e1000_adapter *adapter = hw->back; |
|
4913 return pcix_get_mmrbc(adapter->pdev); |
|
4914 } |
|
4915 |
|
4916 void e1000_pcix_set_mmrbc(struct e1000_hw *hw, int mmrbc) |
|
4917 { |
|
4918 struct e1000_adapter *adapter = hw->back; |
|
4919 pcix_set_mmrbc(adapter->pdev, mmrbc); |
|
4920 } |
|
4921 |
|
4922 void e1000_io_write(struct e1000_hw *hw, unsigned long port, u32 value) |
|
4923 { |
|
4924 outl(value, port); |
|
4925 } |
|
4926 |
|
4927 static bool e1000_vlan_used(struct e1000_adapter *adapter) |
|
4928 { |
|
4929 u16 vid; |
|
4930 |
|
4931 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID) |
|
4932 return true; |
|
4933 return false; |
|
4934 } |
|
4935 |
|
4936 static void __e1000_vlan_mode(struct e1000_adapter *adapter, |
|
4937 netdev_features_t features) |
|
4938 { |
|
4939 struct e1000_hw *hw = &adapter->hw; |
|
4940 u32 ctrl; |
|
4941 |
|
4942 ctrl = er32(CTRL); |
|
4943 if (features & NETIF_F_HW_VLAN_RX) { |
|
4944 /* enable VLAN tag insert/strip */ |
|
4945 ctrl |= E1000_CTRL_VME; |
|
4946 } else { |
|
4947 /* disable VLAN tag insert/strip */ |
|
4948 ctrl &= ~E1000_CTRL_VME; |
|
4949 } |
|
4950 ew32(CTRL, ctrl); |
|
4951 } |
|
4952 static void e1000_vlan_filter_on_off(struct e1000_adapter *adapter, |
|
4953 bool filter_on) |
|
4954 { |
|
4955 struct e1000_hw *hw = &adapter->hw; |
|
4956 u32 rctl; |
|
4957 |
|
4958 if (!test_bit(__E1000_DOWN, &adapter->flags)) |
|
4959 e1000_irq_disable(adapter); |
|
4960 |
|
4961 __e1000_vlan_mode(adapter, adapter->netdev->features); |
|
4962 if (filter_on) { |
|
4963 /* enable VLAN receive filtering */ |
|
4964 rctl = er32(RCTL); |
|
4965 rctl &= ~E1000_RCTL_CFIEN; |
|
4966 if (!(adapter->netdev->flags & IFF_PROMISC)) |
|
4967 rctl |= E1000_RCTL_VFE; |
|
4968 ew32(RCTL, rctl); |
|
4969 e1000_update_mng_vlan(adapter); |
|
4970 } else { |
|
4971 /* disable VLAN receive filtering */ |
|
4972 rctl = er32(RCTL); |
|
4973 rctl &= ~E1000_RCTL_VFE; |
|
4974 ew32(RCTL, rctl); |
|
4975 } |
|
4976 |
|
4977 if (!test_bit(__E1000_DOWN, &adapter->flags)) |
|
4978 e1000_irq_enable(adapter); |
|
4979 } |
|
4980 |
|
4981 static void e1000_vlan_mode(struct net_device *netdev, |
|
4982 netdev_features_t features) |
|
4983 { |
|
4984 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
4985 |
|
4986 if (!test_bit(__E1000_DOWN, &adapter->flags)) |
|
4987 e1000_irq_disable(adapter); |
|
4988 |
|
4989 __e1000_vlan_mode(adapter, features); |
|
4990 |
|
4991 if (!test_bit(__E1000_DOWN, &adapter->flags)) |
|
4992 e1000_irq_enable(adapter); |
|
4993 } |
|
4994 |
|
4995 static int e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid) |
|
4996 { |
|
4997 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
4998 struct e1000_hw *hw = &adapter->hw; |
|
4999 u32 vfta, index; |
|
5000 |
|
5001 if ((hw->mng_cookie.status & |
|
5002 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) && |
|
5003 (vid == adapter->mng_vlan_id)) |
|
5004 return 0; |
|
5005 |
|
5006 if (!e1000_vlan_used(adapter)) |
|
5007 e1000_vlan_filter_on_off(adapter, true); |
|
5008 |
|
5009 /* add VID to filter table */ |
|
5010 index = (vid >> 5) & 0x7F; |
|
5011 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index); |
|
5012 vfta |= (1 << (vid & 0x1F)); |
|
5013 e1000_write_vfta(hw, index, vfta); |
|
5014 |
|
5015 set_bit(vid, adapter->active_vlans); |
|
5016 |
|
5017 return 0; |
|
5018 } |
|
5019 |
|
5020 static int e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid) |
|
5021 { |
|
5022 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
5023 struct e1000_hw *hw = &adapter->hw; |
|
5024 u32 vfta, index; |
|
5025 |
|
5026 if (!test_bit(__E1000_DOWN, &adapter->flags)) |
|
5027 e1000_irq_disable(adapter); |
|
5028 if (!test_bit(__E1000_DOWN, &adapter->flags)) |
|
5029 e1000_irq_enable(adapter); |
|
5030 |
|
5031 /* remove VID from filter table */ |
|
5032 index = (vid >> 5) & 0x7F; |
|
5033 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index); |
|
5034 vfta &= ~(1 << (vid & 0x1F)); |
|
5035 e1000_write_vfta(hw, index, vfta); |
|
5036 |
|
5037 clear_bit(vid, adapter->active_vlans); |
|
5038 |
|
5039 if (!e1000_vlan_used(adapter)) |
|
5040 e1000_vlan_filter_on_off(adapter, false); |
|
5041 |
|
5042 return 0; |
|
5043 } |
|
5044 |
|
5045 static void e1000_restore_vlan(struct e1000_adapter *adapter) |
|
5046 { |
|
5047 u16 vid; |
|
5048 |
|
5049 if (!e1000_vlan_used(adapter)) |
|
5050 return; |
|
5051 |
|
5052 e1000_vlan_filter_on_off(adapter, true); |
|
5053 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID) |
|
5054 e1000_vlan_rx_add_vid(adapter->netdev, vid); |
|
5055 } |
|
5056 |
|
5057 int e1000_set_spd_dplx(struct e1000_adapter *adapter, u32 spd, u8 dplx) |
|
5058 { |
|
5059 struct e1000_hw *hw = &adapter->hw; |
|
5060 |
|
5061 hw->autoneg = 0; |
|
5062 |
|
5063 /* Make sure dplx is at most 1 bit and lsb of speed is not set |
|
5064 * for the switch() below to work */ |
|
5065 if ((spd & 1) || (dplx & ~1)) |
|
5066 goto err_inval; |
|
5067 |
|
5068 /* Fiber NICs only allow 1000 gbps Full duplex */ |
|
5069 if ((hw->media_type == e1000_media_type_fiber) && |
|
5070 spd != SPEED_1000 && |
|
5071 dplx != DUPLEX_FULL) |
|
5072 goto err_inval; |
|
5073 |
|
5074 switch (spd + dplx) { |
|
5075 case SPEED_10 + DUPLEX_HALF: |
|
5076 hw->forced_speed_duplex = e1000_10_half; |
|
5077 break; |
|
5078 case SPEED_10 + DUPLEX_FULL: |
|
5079 hw->forced_speed_duplex = e1000_10_full; |
|
5080 break; |
|
5081 case SPEED_100 + DUPLEX_HALF: |
|
5082 hw->forced_speed_duplex = e1000_100_half; |
|
5083 break; |
|
5084 case SPEED_100 + DUPLEX_FULL: |
|
5085 hw->forced_speed_duplex = e1000_100_full; |
|
5086 break; |
|
5087 case SPEED_1000 + DUPLEX_FULL: |
|
5088 hw->autoneg = 1; |
|
5089 hw->autoneg_advertised = ADVERTISE_1000_FULL; |
|
5090 break; |
|
5091 case SPEED_1000 + DUPLEX_HALF: /* not supported */ |
|
5092 default: |
|
5093 goto err_inval; |
|
5094 } |
|
5095 return 0; |
|
5096 |
|
5097 err_inval: |
|
5098 e_err(probe, "Unsupported Speed/Duplex configuration\n"); |
|
5099 return -EINVAL; |
|
5100 } |
|
5101 |
|
5102 static int __e1000_shutdown(struct pci_dev *pdev, bool *enable_wake) |
|
5103 { |
|
5104 struct net_device *netdev = pci_get_drvdata(pdev); |
|
5105 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
5106 struct e1000_hw *hw = &adapter->hw; |
|
5107 u32 ctrl, ctrl_ext, rctl, status; |
|
5108 u32 wufc = adapter->wol; |
|
5109 #ifdef CONFIG_PM |
|
5110 int retval = 0; |
|
5111 #endif |
|
5112 |
|
5113 if (adapter->ecdev) { |
|
5114 return -EBUSY; |
|
5115 } |
|
5116 |
|
5117 netif_device_detach(netdev); |
|
5118 |
|
5119 if (netif_running(netdev)) { |
|
5120 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags)); |
|
5121 e1000_down(adapter); |
|
5122 } |
|
5123 |
|
5124 #ifdef CONFIG_PM |
|
5125 retval = pci_save_state(pdev); |
|
5126 if (retval) |
|
5127 return retval; |
|
5128 #endif |
|
5129 |
|
5130 status = er32(STATUS); |
|
5131 if (status & E1000_STATUS_LU) |
|
5132 wufc &= ~E1000_WUFC_LNKC; |
|
5133 |
|
5134 if (wufc) { |
|
5135 e1000_setup_rctl(adapter); |
|
5136 e1000_set_rx_mode(netdev); |
|
5137 |
|
5138 rctl = er32(RCTL); |
|
5139 |
|
5140 /* turn on all-multi mode if wake on multicast is enabled */ |
|
5141 if (wufc & E1000_WUFC_MC) |
|
5142 rctl |= E1000_RCTL_MPE; |
|
5143 |
|
5144 /* enable receives in the hardware */ |
|
5145 ew32(RCTL, rctl | E1000_RCTL_EN); |
|
5146 |
|
5147 if (hw->mac_type >= e1000_82540) { |
|
5148 ctrl = er32(CTRL); |
|
5149 /* advertise wake from D3Cold */ |
|
5150 #define E1000_CTRL_ADVD3WUC 0x00100000 |
|
5151 /* phy power management enable */ |
|
5152 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000 |
|
5153 ctrl |= E1000_CTRL_ADVD3WUC | |
|
5154 E1000_CTRL_EN_PHY_PWR_MGMT; |
|
5155 ew32(CTRL, ctrl); |
|
5156 } |
|
5157 |
|
5158 if (hw->media_type == e1000_media_type_fiber || |
|
5159 hw->media_type == e1000_media_type_internal_serdes) { |
|
5160 /* keep the laser running in D3 */ |
|
5161 ctrl_ext = er32(CTRL_EXT); |
|
5162 ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA; |
|
5163 ew32(CTRL_EXT, ctrl_ext); |
|
5164 } |
|
5165 |
|
5166 ew32(WUC, E1000_WUC_PME_EN); |
|
5167 ew32(WUFC, wufc); |
|
5168 } else { |
|
5169 ew32(WUC, 0); |
|
5170 ew32(WUFC, 0); |
|
5171 } |
|
5172 |
|
5173 e1000_release_manageability(adapter); |
|
5174 |
|
5175 *enable_wake = !!wufc; |
|
5176 |
|
5177 /* make sure adapter isn't asleep if manageability is enabled */ |
|
5178 if (adapter->en_mng_pt) |
|
5179 *enable_wake = true; |
|
5180 |
|
5181 if (netif_running(netdev)) |
|
5182 e1000_free_irq(adapter); |
|
5183 |
|
5184 pci_disable_device(pdev); |
|
5185 |
|
5186 return 0; |
|
5187 } |
|
5188 |
|
5189 #ifdef CONFIG_PM |
|
5190 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state) |
|
5191 { |
|
5192 int retval; |
|
5193 bool wake; |
|
5194 |
|
5195 retval = __e1000_shutdown(pdev, &wake); |
|
5196 if (retval) |
|
5197 return retval; |
|
5198 |
|
5199 if (wake) { |
|
5200 pci_prepare_to_sleep(pdev); |
|
5201 } else { |
|
5202 pci_wake_from_d3(pdev, false); |
|
5203 pci_set_power_state(pdev, PCI_D3hot); |
|
5204 } |
|
5205 |
|
5206 return 0; |
|
5207 } |
|
5208 |
|
5209 static int e1000_resume(struct pci_dev *pdev) |
|
5210 { |
|
5211 struct net_device *netdev = pci_get_drvdata(pdev); |
|
5212 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
5213 struct e1000_hw *hw = &adapter->hw; |
|
5214 u32 err; |
|
5215 |
|
5216 if (adapter->ecdev) { |
|
5217 return -EBUSY; |
|
5218 } |
|
5219 |
|
5220 pci_set_power_state(pdev, PCI_D0); |
|
5221 pci_restore_state(pdev); |
|
5222 pci_save_state(pdev); |
|
5223 |
|
5224 if (adapter->need_ioport) |
|
5225 err = pci_enable_device(pdev); |
|
5226 else |
|
5227 err = pci_enable_device_mem(pdev); |
|
5228 if (err) { |
|
5229 pr_err("Cannot enable PCI device from suspend\n"); |
|
5230 return err; |
|
5231 } |
|
5232 pci_set_master(pdev); |
|
5233 |
|
5234 pci_enable_wake(pdev, PCI_D3hot, 0); |
|
5235 pci_enable_wake(pdev, PCI_D3cold, 0); |
|
5236 |
|
5237 if (netif_running(netdev)) { |
|
5238 err = e1000_request_irq(adapter); |
|
5239 if (err) |
|
5240 return err; |
|
5241 } |
|
5242 |
|
5243 e1000_power_up_phy(adapter); |
|
5244 e1000_reset(adapter); |
|
5245 ew32(WUS, ~0); |
|
5246 |
|
5247 e1000_init_manageability(adapter); |
|
5248 |
|
5249 if (netif_running(netdev)) |
|
5250 e1000_up(adapter); |
|
5251 |
|
5252 if (!adapter->ecdev) { |
|
5253 netif_device_attach(netdev); |
|
5254 } |
|
5255 |
|
5256 return 0; |
|
5257 } |
|
5258 #endif |
|
5259 |
|
5260 static void e1000_shutdown(struct pci_dev *pdev) |
|
5261 { |
|
5262 bool wake; |
|
5263 |
|
5264 __e1000_shutdown(pdev, &wake); |
|
5265 |
|
5266 if (system_state == SYSTEM_POWER_OFF) { |
|
5267 pci_wake_from_d3(pdev, wake); |
|
5268 pci_set_power_state(pdev, PCI_D3hot); |
|
5269 } |
|
5270 } |
|
5271 |
|
5272 #ifdef CONFIG_NET_POLL_CONTROLLER |
|
5273 /* |
|
5274 * Polling 'interrupt' - used by things like netconsole to send skbs |
|
5275 * without having to re-enable interrupts. It's not called while |
|
5276 * the interrupt routine is executing. |
|
5277 */ |
|
5278 static void e1000_netpoll(struct net_device *netdev) |
|
5279 { |
|
5280 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
5281 |
|
5282 disable_irq(adapter->pdev->irq); |
|
5283 e1000_intr(adapter->pdev->irq, netdev); |
|
5284 enable_irq(adapter->pdev->irq); |
|
5285 } |
|
5286 #endif |
|
5287 |
|
5288 /** |
|
5289 * e1000_io_error_detected - called when PCI error is detected |
|
5290 * @pdev: Pointer to PCI device |
|
5291 * @state: The current pci connection state |
|
5292 * |
|
5293 * This function is called after a PCI bus error affecting |
|
5294 * this device has been detected. |
|
5295 */ |
|
5296 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev, |
|
5297 pci_channel_state_t state) |
|
5298 { |
|
5299 struct net_device *netdev = pci_get_drvdata(pdev); |
|
5300 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
5301 |
|
5302 netif_device_detach(netdev); |
|
5303 |
|
5304 if (state == pci_channel_io_perm_failure) |
|
5305 return PCI_ERS_RESULT_DISCONNECT; |
|
5306 |
|
5307 if (netif_running(netdev)) |
|
5308 e1000_down(adapter); |
|
5309 pci_disable_device(pdev); |
|
5310 |
|
5311 /* Request a slot slot reset. */ |
|
5312 return PCI_ERS_RESULT_NEED_RESET; |
|
5313 } |
|
5314 |
|
5315 /** |
|
5316 * e1000_io_slot_reset - called after the pci bus has been reset. |
|
5317 * @pdev: Pointer to PCI device |
|
5318 * |
|
5319 * Restart the card from scratch, as if from a cold-boot. Implementation |
|
5320 * resembles the first-half of the e1000_resume routine. |
|
5321 */ |
|
5322 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev) |
|
5323 { |
|
5324 struct net_device *netdev = pci_get_drvdata(pdev); |
|
5325 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
5326 struct e1000_hw *hw = &adapter->hw; |
|
5327 int err; |
|
5328 |
|
5329 if (adapter->need_ioport) |
|
5330 err = pci_enable_device(pdev); |
|
5331 else |
|
5332 err = pci_enable_device_mem(pdev); |
|
5333 if (err) { |
|
5334 pr_err("Cannot re-enable PCI device after reset.\n"); |
|
5335 return PCI_ERS_RESULT_DISCONNECT; |
|
5336 } |
|
5337 pci_set_master(pdev); |
|
5338 |
|
5339 pci_enable_wake(pdev, PCI_D3hot, 0); |
|
5340 pci_enable_wake(pdev, PCI_D3cold, 0); |
|
5341 |
|
5342 e1000_reset(adapter); |
|
5343 ew32(WUS, ~0); |
|
5344 |
|
5345 return PCI_ERS_RESULT_RECOVERED; |
|
5346 } |
|
5347 |
|
5348 /** |
|
5349 * e1000_io_resume - called when traffic can start flowing again. |
|
5350 * @pdev: Pointer to PCI device |
|
5351 * |
|
5352 * This callback is called when the error recovery driver tells us that |
|
5353 * its OK to resume normal operation. Implementation resembles the |
|
5354 * second-half of the e1000_resume routine. |
|
5355 */ |
|
5356 static void e1000_io_resume(struct pci_dev *pdev) |
|
5357 { |
|
5358 struct net_device *netdev = pci_get_drvdata(pdev); |
|
5359 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
5360 |
|
5361 e1000_init_manageability(adapter); |
|
5362 |
|
5363 if (netif_running(netdev)) { |
|
5364 if (e1000_up(adapter)) { |
|
5365 pr_info("can't bring device back up after reset\n"); |
|
5366 return; |
|
5367 } |
|
5368 } |
|
5369 |
|
5370 netif_device_attach(netdev); |
|
5371 } |
|
5372 |
|
5373 /* e1000_main.c */ |