31 #define DRV_VERSION      "0.10" DRV_EXTRAVERSION

    32 #define DRV_VERSION      "0.13" DRV_EXTRAVERSION

    44 	CCATINFO_COPY_BLOCK = 0x17,

    53 	CCATINFO_SRAM = 0x16,

    45 	CCATINFO_MAX

    54 };

    55 

    56 struct ccat_cdev {

    57 	atomic_t in_use;

    58 	void __iomem *ioaddr;

    59 	size_t iosize;

    60 	dev_t dev;

    61 	struct cdev cdev;

    62 	struct ccat_class *class;

    49  * struct ccat_bar - CCAT PCI Base Address Register(BAR) configuration

    66  * struct cdev_buffer

    50  * @start: start address of this BAR

    67  * @ccdev: referenced character device

    51  * @end: end address of this BAR

    68  * @data: buffer used for write operations

    52  * @len: length of this BAR

    69  * @size: number of bytes written to the data buffer

    53  * @flags: flags set on this BAR

    54  * @ioaddr: ioremapped address of this bar

    56 struct ccat_bar {

    71 struct cdev_buffer {

    57 	unsigned long start;

    72 	struct ccat_cdev *ccdev;

    58 	unsigned long end;

    73 	size_t size;

    59 	unsigned long len;

    74 	char data[];

    60 	unsigned long flags;

    61 	void __iomem *ioaddr;

    64 /**

    77 extern int ccat_cdev_open(struct inode *const i, struct file *const f);

    65  * struct ccat_dma - CCAT DMA channel configuration

    78 extern int ccat_cdev_release(struct inode *const i, struct file *const f);

    66  * @phys: device-viewed address(physical) of the associated DMA memory

    67  * @virt: CPU-viewed address(virtual) of the associated DMA memory

    68  * @size: number of bytes in the associated DMA memory

    69  * @channel: CCAT DMA channel number

    70  * @dev: valid struct device pointer

    71  */

    72 struct ccat_dma {

    73 	dma_addr_t phys;

    74 	void *virt;

    75 	size_t size;

    76 	size_t channel;

    77 	struct device *dev;

    78 };

    79 

    80 extern void ccat_dma_free(struct ccat_dma *const dma);

    81 extern int ccat_dma_init(struct ccat_dma *const dma, size_t channel,

    82 			 void __iomem * const ioaddr, struct device *const dev);

    83 

    84 /**

    85  * struct ccat_eth_frame - Ethernet frame with DMA descriptor header in front

    86  * @reservedn: is not used and should always be set to 0

    87  * @received: used for reception, is set to 1 by the CCAT when data was written

    88  * @length: number of bytes in the frame including the DMA header

    89  * @sent: is set to 1 by the CCAT when data was transmitted

    90  * @timestamp: a 64 bit EtherCAT timestamp

    91  * @data: the bytes of the ethernet frame

    92  */

    93 struct ccat_eth_frame {

    94 	__le32 reserved1;

    95 	__le32 rx_flags;

    96 #define CCAT_FRAME_RECEIVED 0x1

    97 	__le16 length;

    98 	__le16 reserved3;

    99 	__le32 tx_flags;

   100 #define CCAT_FRAME_SENT 0x1

   101 	__le64 timestamp;

   102 	u8 data[0x800 - 3 * sizeof(u64)];

   103 #define CCAT_ETH_FRAME_HEAD_LEN offsetof(struct ccat_eth_frame, data)

   104 };

   105 

   106 /**

   107  * struct ccat_eth_register - CCAT register addresses in the PCI BAR

   108  * @mii: address of the CCAT management interface register

   109  * @tx_fifo: address of the CCAT TX DMA fifo register

   110  * @rx_fifo: address of the CCAT RX DMA fifo register

   111  * @mac: address of the CCAT media access control register

   112  * @rx_mem: address of the CCAT register holding the RX DMA address

   113  * @tx_mem: address of the CCAT register holding the TX DMA address

   114  * @misc: address of a CCAT register holding miscellaneous information

   115  */

   116 struct ccat_eth_register {

   117 	void __iomem *mii;

   118 	void __iomem *tx_fifo;

   119 	void __iomem *rx_fifo;

   120 	void __iomem *mac;

   121 	void __iomem *rx_mem;

   122 	void __iomem *tx_mem;

   123 	void __iomem *misc;

   124 };

   125 

   126 /**

   127  * struct ccat_eth_dma_fifo - CCAT RX or TX DMA fifo

   128  * @add: callback used to add a frame to this fifo

   129  * @reg: PCI register address of this DMA fifo

   130  * @dma: information about the associated DMA memory

   131  */

   132 struct ccat_eth_dma_fifo {

   133 	void (*add) (struct ccat_eth_dma_fifo *, struct ccat_eth_frame *);

   134 	void __iomem *reg;

   135 	const struct ccat_eth_frame *end;

   136 	struct ccat_eth_frame *next;

   137 	struct ccat_dma dma;

   138 };

   143  * @ethdev: CCAT Ethernet/EtherCAT Master (with DMA) function, NULL if function is not available or failed to initialize

    83  * @bar_0: holding information about PCI BAR 0

   144  * @update: CCAT Update function, NULL if function is not available or failed to initialize

    84  * @bar_2: holding information about PCI BAR 2 (optional)

   145  * @bar [0] and [2] holding information about PCI BARs 0 and 2.

    85  * @functions: list of available (driver loaded) FPGA functions

   148  * a CCAT is implemented as FPGA the available functions can vary so

    88  * a CCAT is implemented as FPGA the available functions can vary.

   149  * the function object pointers can be NULL.

   150  * Extra note: you will recognize that PCI BAR1 is not used and is a

   151  * waste of memory, thats true but right now, its very easy to use it

   152  * this way. So we might optimize it later.

   155 	struct pci_dev *pdev;

    91 	void *pdev;

   156 	struct ccat_eth_priv *ethdev;

    92 	void __iomem *bar_0;

   157 	struct ccat_update *update;

    93 	void __iomem *bar_2;

   158 	struct ccat_bar bar[3];	//TODO optimize this

    94 	struct list_head functions;

   175 /**

   121 struct ccat_function {

   176  * struct ccat_eth_priv - CCAT Ethernet/EtherCAT Master function (netdev)

   122 	const struct ccat_driver *drv;

   177  * @ccatdev: pointer to the parent struct ccat_device

   123 	struct ccat_device *ccat;

   178  * @netdev: the net_device structure used by the kernel networking stack

   179  * @info: holds a copy of the CCAT Ethernet/EtherCAT Master function information block (read from PCI config space)

   180  * @reg: register addresses in PCI config space of the Ethernet/EtherCAT Master function

   181  * @rx_fifo: DMA fifo used for RX DMA descriptors

   182  * @tx_fifo: DMA fifo used for TX DMA descriptors

   183  * @poll_timer: interval timer used to poll CCAT for events like link changed, rx done, tx done

   184  * @rx_bytes: number of bytes received -> reported with ndo_get_stats64()

   185  * @rx_dropped: number of received frames, which were dropped -> reported with ndo_get_stats64()

   186  * @tx_bytes: number of bytes send -> reported with ndo_get_stats64()

   187  * @tx_dropped: number of frames requested to send, which were dropped -> reported with ndo_get_stats64()

   188  */

   189 struct ccat_eth_priv {

   190 	const struct ccat_device *ccatdev;

   191 	struct net_device *netdev;

   193 	struct ccat_eth_register reg;

   125 	struct list_head list;

   194 	struct ccat_eth_dma_fifo rx_fifo;

   126 	void *private_data;

   195 	struct ccat_eth_dma_fifo tx_fifo;

   196 	struct hrtimer poll_timer;

   197 	atomic64_t rx_bytes;

   198 	atomic64_t rx_dropped;

   199 	atomic64_t tx_bytes;

   200 	atomic64_t tx_dropped;

   201 	ec_device_t *ecdev;

   202 	void (*carrier_off) (struct net_device * netdev);

   203 	bool (*carrier_ok) (const struct net_device * netdev);

   204 	void (*carrier_on) (struct net_device * netdev);

   205 	void (*kfree_skb_any) (struct sk_buff * skb);

   206 	void (*start_queue) (struct net_device * netdev);

   207 	void (*stop_queue) (struct net_device * netdev);

   208 	void (*unregister) (struct net_device * netdev);

   211 /**

   129 struct ccat_class {

   212  * same as: typedef struct _CCatInfoBlockOffs from CCatDefinitions.h

   130 	dev_t dev;

   213  * TODO add some checking facility outside of the linux tree

   131 	struct class *class;

   214  */

   132 	atomic_t instances;

   215 struct ccat_mac_infoblock {

   133 	const unsigned count;

   216 	u32 reserved;

   134 	struct ccat_cdev *devices;

   217 	u32 mii;

   135 	const char *name;

   218 	u32 tx_fifo;

   136 	struct file_operations fops;

   219 	u32 mac;

   220 	u32 rx_mem;

   221 	u32 tx_mem;

   222 	u32 misc;

   225 struct ccat_mac_register {

   139 extern void ccat_cdev_remove(struct ccat_function *func);

   226 	/** MAC error register     @+0x0 */

   140 extern int ccat_cdev_probe(struct ccat_function *func,

   227 	u8 frame_len_err;

   141 			   struct ccat_class *cdev_class, size_t iosize);

   228 	u8 rx_err;

   142 

   229 	u8 crc_err;

   143 /**

   230 	u8 link_lost_err;

   144  * struct ccat_driver - CCAT FPGA function

   231 	u32 reserved1;

   145  * @probe: add device instance

   232 	/** Buffer overflow errors @+0x8 */

   146  * @remove: remove device instance

   233 	u8 rx_mem_full;

   147  * @type: type of the FPGA function supported by this driver

   234 	u8 reserved2[7];

   148  * @cdev_class: if not NULL that driver supports ccat_class_init()/_exit()

   235 	/** MAC frame counter      @+0x10 */

   149  */

   236 	u32 tx_frames;

   150 struct ccat_driver {

   237 	u32 rx_frames;

   151 	int (*probe) (struct ccat_function * func);

   238 	u64 reserved3;

   152 	void (*remove) (struct ccat_function * drv);

   239 	/** MAC fifo level         @+0x20 */

   153 	enum ccat_info_t type;

   240 	u8 tx_fifo_level:7;

   154 	struct ccat_class *cdev_class;

   241 	u8 reserved4:1;

   242 	u8 reserved5[7];

   243 	/** TX memory full error   @+0x28 */

   244 	u8 tx_mem_full;

   245 	u8 reserved6[7];

   246 	u64 reserved8[9];

   247 	/** Connection             @+0x78 */

   248 	u8 mii_connected;