1 /*************************************************************************
2 * myri10ge.c: Myricom Myri-10G Ethernet driver.
4 * Copyright (C) 2005, 2006 Myricom, Inc.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of Myricom, Inc. nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * If the eeprom on your board is not recent enough, you will need to get a
33 * newer firmware image at:
34 * http://www.myri.com/scs/download-Myri10GE.html
36 * Contact Information:
38 * Myricom, Inc., 325N Santa Anita Avenue, Arcadia, CA 91006
39 *************************************************************************/
41 #include <linux/tcp.h>
42 #include <linux/netdevice.h>
43 #include <linux/skbuff.h>
44 #include <linux/string.h>
45 #include <linux/module.h>
46 #include <linux/pci.h>
47 #include <linux/dma-mapping.h>
48 #include <linux/etherdevice.h>
49 #include <linux/if_ether.h>
50 #include <linux/if_vlan.h>
52 #include <linux/inet.h>
54 #include <linux/ethtool.h>
55 #include <linux/firmware.h>
56 #include <linux/delay.h>
57 #include <linux/version.h>
58 #include <linux/timer.h>
59 #include <linux/vmalloc.h>
60 #include <linux/crc32.h>
61 #include <linux/moduleparam.h>
63 #include <net/checksum.h>
64 #include <asm/byteorder.h>
66 #include <asm/processor.h>
71 #include "myri10ge_mcp.h"
72 #include "myri10ge_mcp_gen_header.h"
74 #define MYRI10GE_VERSION_STR "1.0.0"
76 MODULE_DESCRIPTION("Myricom 10G driver (10GbE)");
77 MODULE_AUTHOR("Maintainer: help@myri.com");
78 MODULE_VERSION(MYRI10GE_VERSION_STR);
79 MODULE_LICENSE("Dual BSD/GPL");
81 #define MYRI10GE_MAX_ETHER_MTU 9014
83 #define MYRI10GE_ETH_STOPPED 0
84 #define MYRI10GE_ETH_STOPPING 1
85 #define MYRI10GE_ETH_STARTING 2
86 #define MYRI10GE_ETH_RUNNING 3
87 #define MYRI10GE_ETH_OPEN_FAILED 4
89 #define MYRI10GE_EEPROM_STRINGS_SIZE 256
90 #define MYRI10GE_MAX_SEND_DESC_TSO ((65536 / 2048) * 2)
92 #define MYRI10GE_NO_CONFIRM_DATA 0xffffffff
93 #define MYRI10GE_NO_RESPONSE_RESULT 0xffffffff
95 struct myri10ge_rx_buffer_state {
97 DECLARE_PCI_UNMAP_ADDR(bus)
98 DECLARE_PCI_UNMAP_LEN(len)
101 struct myri10ge_tx_buffer_state {
104 DECLARE_PCI_UNMAP_ADDR(bus)
105 DECLARE_PCI_UNMAP_LEN(len)
108 struct myri10ge_cmd {
114 struct myri10ge_rx_buf {
115 struct mcp_kreq_ether_recv __iomem *lanai; /* lanai ptr for recv ring */
116 u8 __iomem *wc_fifo; /* w/c rx dma addr fifo address */
117 struct mcp_kreq_ether_recv *shadow; /* host shadow of recv ring */
118 struct myri10ge_rx_buffer_state *info;
121 int mask; /* number of rx slots -1 */
124 struct myri10ge_tx_buf {
125 struct mcp_kreq_ether_send __iomem *lanai; /* lanai ptr for sendq */
126 u8 __iomem *wc_fifo; /* w/c send fifo address */
127 struct mcp_kreq_ether_send *req_list; /* host shadow of sendq */
129 struct myri10ge_tx_buffer_state *info;
130 int mask; /* number of transmit slots -1 */
131 int boundary; /* boundary transmits cannot cross */
132 int req ____cacheline_aligned; /* transmit slots submitted */
133 int pkt_start; /* packets started */
134 int done ____cacheline_aligned; /* transmit slots completed */
135 int pkt_done; /* packets completed */
138 struct myri10ge_rx_done {
139 struct mcp_slot *entry;
145 struct myri10ge_priv {
146 int running; /* running? */
147 int csum_flag; /* rx_csums? */
148 struct myri10ge_tx_buf tx; /* transmit ring */
149 struct myri10ge_rx_buf rx_small;
150 struct myri10ge_rx_buf rx_big;
151 struct myri10ge_rx_done rx_done;
153 struct net_device *dev;
154 struct net_device_stats stats;
157 unsigned long board_span;
158 unsigned long iomem_base;
159 u32 __iomem *irq_claim;
160 u32 __iomem *irq_deassert;
161 char *mac_addr_string;
162 struct mcp_cmd_response *cmd;
164 struct mcp_irq_data *fw_stats;
165 dma_addr_t fw_stats_bus;
166 struct pci_dev *pdev;
168 unsigned int link_state;
169 unsigned int rdma_tags_available;
171 u32 __iomem *intr_coal_delay_ptr;
176 wait_queue_head_t down_wq;
177 struct work_struct watchdog_work;
178 struct timer_list watchdog_timer;
179 int watchdog_tx_done;
184 char eeprom_strings[MYRI10GE_EEPROM_STRINGS_SIZE];
185 char fw_version[128];
186 u8 mac_addr[6]; /* eeprom mac address */
187 unsigned long serial_number;
188 int vendor_specific_offset;
197 static char *myri10ge_fw_unaligned = "myri10ge_ethp_z8e.dat";
198 static char *myri10ge_fw_aligned = "myri10ge_eth_z8e.dat";
200 static char *myri10ge_fw_name = NULL;
201 module_param(myri10ge_fw_name, charp, S_IRUGO | S_IWUSR);
202 MODULE_PARM_DESC(myri10ge_fw_name, "Firmware image name\n");
204 static int myri10ge_ecrc_enable = 1;
205 module_param(myri10ge_ecrc_enable, int, S_IRUGO);
206 MODULE_PARM_DESC(myri10ge_ecrc_enable, "Enable Extended CRC on PCI-E\n");
208 static int myri10ge_max_intr_slots = 1024;
209 module_param(myri10ge_max_intr_slots, int, S_IRUGO);
210 MODULE_PARM_DESC(myri10ge_max_intr_slots, "Interrupt queue slots\n");
212 static int myri10ge_small_bytes = -1; /* -1 == auto */
213 module_param(myri10ge_small_bytes, int, S_IRUGO | S_IWUSR);
214 MODULE_PARM_DESC(myri10ge_small_bytes, "Threshold of small packets\n");
216 static int myri10ge_msi = 1; /* enable msi by default */
217 module_param(myri10ge_msi, int, S_IRUGO);
218 MODULE_PARM_DESC(myri10ge_msi, "Enable Message Signalled Interrupts\n");
220 static int myri10ge_intr_coal_delay = 25;
221 module_param(myri10ge_intr_coal_delay, int, S_IRUGO);
222 MODULE_PARM_DESC(myri10ge_intr_coal_delay, "Interrupt coalescing delay\n");
224 static int myri10ge_flow_control = 1;
225 module_param(myri10ge_flow_control, int, S_IRUGO);
226 MODULE_PARM_DESC(myri10ge_flow_control, "Pause parameter\n");
228 static int myri10ge_deassert_wait = 1;
229 module_param(myri10ge_deassert_wait, int, S_IRUGO | S_IWUSR);
230 MODULE_PARM_DESC(myri10ge_deassert_wait,
231 "Wait when deasserting legacy interrupts\n");
233 static int myri10ge_force_firmware = 0;
234 module_param(myri10ge_force_firmware, int, S_IRUGO);
235 MODULE_PARM_DESC(myri10ge_force_firmware,
236 "Force firmware to assume aligned completions\n");
238 static int myri10ge_skb_cross_4k = 0;
239 module_param(myri10ge_skb_cross_4k, int, S_IRUGO | S_IWUSR);
240 MODULE_PARM_DESC(myri10ge_skb_cross_4k,
241 "Can a small skb cross a 4KB boundary?\n");
243 static int myri10ge_initial_mtu = MYRI10GE_MAX_ETHER_MTU - ETH_HLEN;
244 module_param(myri10ge_initial_mtu, int, S_IRUGO);
245 MODULE_PARM_DESC(myri10ge_initial_mtu, "Initial MTU\n");
247 static int myri10ge_napi_weight = 64;
248 module_param(myri10ge_napi_weight, int, S_IRUGO);
249 MODULE_PARM_DESC(myri10ge_napi_weight, "Set NAPI weight\n");
251 static int myri10ge_watchdog_timeout = 1;
252 module_param(myri10ge_watchdog_timeout, int, S_IRUGO);
253 MODULE_PARM_DESC(myri10ge_watchdog_timeout, "Set watchdog timeout\n");
255 static int myri10ge_max_irq_loops = 1048576;
256 module_param(myri10ge_max_irq_loops, int, S_IRUGO);
257 MODULE_PARM_DESC(myri10ge_max_irq_loops,
258 "Set stuck legacy IRQ detection threshold\n");
260 #define MYRI10GE_FW_OFFSET 1024*1024
261 #define MYRI10GE_HIGHPART_TO_U32(X) \
262 (sizeof (X) == 8) ? ((u32)((u64)(X) >> 32)) : (0)
263 #define MYRI10GE_LOWPART_TO_U32(X) ((u32)(X))
265 #define myri10ge_pio_copy(to,from,size) __iowrite64_copy(to,from,size/8)
268 myri10ge_send_cmd(struct myri10ge_priv *mgp, u32 cmd,
269 struct myri10ge_cmd *data, int atomic)
272 char buf_bytes[sizeof(*buf) + 8];
273 struct mcp_cmd_response *response = mgp->cmd;
274 char __iomem *cmd_addr = mgp->sram + MXGEFW_CMD_OFFSET;
275 u32 dma_low, dma_high, result, value;
278 /* ensure buf is aligned to 8 bytes */
279 buf = (struct mcp_cmd *)ALIGN((unsigned long)buf_bytes, 8);
281 buf->data0 = htonl(data->data0);
282 buf->data1 = htonl(data->data1);
283 buf->data2 = htonl(data->data2);
284 buf->cmd = htonl(cmd);
285 dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
286 dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
288 buf->response_addr.low = htonl(dma_low);
289 buf->response_addr.high = htonl(dma_high);
290 response->result = MYRI10GE_NO_RESPONSE_RESULT;
292 myri10ge_pio_copy(cmd_addr, buf, sizeof(*buf));
294 /* wait up to 15ms. Longest command is the DMA benchmark,
295 * which is capped at 5ms, but runs from a timeout handler
296 * that runs every 7.8ms. So a 15ms timeout leaves us with
300 /* if atomic is set, do not sleep,
301 * and try to get the completion quickly
302 * (1ms will be enough for those commands) */
303 for (sleep_total = 0;
305 && response->result == MYRI10GE_NO_RESPONSE_RESULT;
309 /* use msleep for most command */
310 for (sleep_total = 0;
312 && response->result == MYRI10GE_NO_RESPONSE_RESULT;
317 result = ntohl(response->result);
318 value = ntohl(response->data);
319 if (result != MYRI10GE_NO_RESPONSE_RESULT) {
324 dev_err(&mgp->pdev->dev,
325 "command %d failed, result = %d\n",
331 dev_err(&mgp->pdev->dev, "command %d timed out, result = %d\n",
337 * The eeprom strings on the lanaiX have the format
340 * PT:ddd mmm xx xx:xx:xx xx\0
341 * PV:ddd mmm xx xx:xx:xx xx\0
343 static int myri10ge_read_mac_addr(struct myri10ge_priv *mgp)
348 ptr = mgp->eeprom_strings;
349 limit = mgp->eeprom_strings + MYRI10GE_EEPROM_STRINGS_SIZE;
351 while (*ptr != '\0' && ptr < limit) {
352 if (memcmp(ptr, "MAC=", 4) == 0) {
354 mgp->mac_addr_string = ptr;
355 for (i = 0; i < 6; i++) {
356 if ((ptr + 2) > limit)
359 simple_strtoul(ptr, &ptr, 16);
363 if (memcmp((const void *)ptr, "SN=", 3) == 0) {
365 mgp->serial_number = simple_strtoul(ptr, &ptr, 10);
367 while (ptr < limit && *ptr++) ;
373 dev_err(&mgp->pdev->dev, "failed to parse eeprom_strings\n");
378 * Enable or disable periodic RDMAs from the host to make certain
379 * chipsets resend dropped PCIe messages
382 static void myri10ge_dummy_rdma(struct myri10ge_priv *mgp, int enable)
384 char __iomem *submit;
386 u32 dma_low, dma_high;
389 /* clear confirmation addr */
393 /* send a rdma command to the PCIe engine, and wait for the
394 * response in the confirmation address. The firmware should
395 * write a -1 there to indicate it is alive and well
397 dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
398 dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
400 buf[0] = htonl(dma_high); /* confirm addr MSW */
401 buf[1] = htonl(dma_low); /* confirm addr LSW */
402 buf[2] = htonl(MYRI10GE_NO_CONFIRM_DATA); /* confirm data */
403 buf[3] = htonl(dma_high); /* dummy addr MSW */
404 buf[4] = htonl(dma_low); /* dummy addr LSW */
405 buf[5] = htonl(enable); /* enable? */
407 submit = mgp->sram + 0xfc01c0;
409 myri10ge_pio_copy(submit, &buf, sizeof(buf));
410 for (i = 0; mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA && i < 20; i++)
412 if (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA)
413 dev_err(&mgp->pdev->dev, "dummy rdma %s failed\n",
414 (enable ? "enable" : "disable"));
418 myri10ge_validate_firmware(struct myri10ge_priv *mgp,
419 struct mcp_gen_header *hdr)
421 struct device *dev = &mgp->pdev->dev;
424 /* check firmware type */
425 if (ntohl(hdr->mcp_type) != MCP_TYPE_ETH) {
426 dev_err(dev, "Bad firmware type: 0x%x\n", ntohl(hdr->mcp_type));
430 /* save firmware version for ethtool */
431 strncpy(mgp->fw_version, hdr->version, sizeof(mgp->fw_version));
433 sscanf(mgp->fw_version, "%d.%d", &major, &minor);
435 if (!(major == MXGEFW_VERSION_MAJOR && minor == MXGEFW_VERSION_MINOR)) {
436 dev_err(dev, "Found firmware version %s\n", mgp->fw_version);
437 dev_err(dev, "Driver needs %d.%d\n", MXGEFW_VERSION_MAJOR,
438 MXGEFW_VERSION_MINOR);
444 static int myri10ge_load_hotplug_firmware(struct myri10ge_priv *mgp, u32 * size)
446 unsigned crc, reread_crc;
447 const struct firmware *fw;
448 struct device *dev = &mgp->pdev->dev;
449 struct mcp_gen_header *hdr;
453 if ((status = request_firmware(&fw, mgp->fw_name, dev)) < 0) {
454 dev_err(dev, "Unable to load %s firmware image via hotplug\n",
457 goto abort_with_nothing;
462 if (fw->size >= mgp->sram_size - MYRI10GE_FW_OFFSET ||
463 fw->size < MCP_HEADER_PTR_OFFSET + 4) {
464 dev_err(dev, "Firmware size invalid:%d\n", (int)fw->size);
470 hdr_offset = ntohl(*(u32 *) (fw->data + MCP_HEADER_PTR_OFFSET));
471 if ((hdr_offset & 3) || hdr_offset + sizeof(*hdr) > fw->size) {
472 dev_err(dev, "Bad firmware file\n");
476 hdr = (void *)(fw->data + hdr_offset);
478 status = myri10ge_validate_firmware(mgp, hdr);
482 crc = crc32(~0, fw->data, fw->size);
483 if (mgp->tx.boundary == 2048) {
484 /* Avoid PCI burst on chipset with unaligned completions. */
486 __iomem u32 *ptr = (__iomem u32 *) (mgp->sram +
488 for (i = 0; i < fw->size / 4; i++) {
489 __raw_writel(((u32 *) fw->data)[i], ptr + i);
493 myri10ge_pio_copy(mgp->sram + MYRI10GE_FW_OFFSET, fw->data,
496 /* corruption checking is good for parity recovery and buggy chipset */
497 memcpy_fromio(fw->data, mgp->sram + MYRI10GE_FW_OFFSET, fw->size);
498 reread_crc = crc32(~0, fw->data, fw->size);
499 if (crc != reread_crc) {
500 dev_err(dev, "CRC failed(fw-len=%u), got 0x%x (expect 0x%x)\n",
501 (unsigned)fw->size, reread_crc, crc);
505 *size = (u32) fw->size;
508 release_firmware(fw);
514 static int myri10ge_adopt_running_firmware(struct myri10ge_priv *mgp)
516 struct mcp_gen_header *hdr;
517 struct device *dev = &mgp->pdev->dev;
518 const size_t bytes = sizeof(struct mcp_gen_header);
522 /* find running firmware header */
523 hdr_offset = ntohl(__raw_readl(mgp->sram + MCP_HEADER_PTR_OFFSET));
525 if ((hdr_offset & 3) || hdr_offset + sizeof(*hdr) > mgp->sram_size) {
526 dev_err(dev, "Running firmware has bad header offset (%d)\n",
531 /* copy header of running firmware from SRAM to host memory to
532 * validate firmware */
533 hdr = kmalloc(bytes, GFP_KERNEL);
535 dev_err(dev, "could not malloc firmware hdr\n");
538 memcpy_fromio(hdr, mgp->sram + hdr_offset, bytes);
539 status = myri10ge_validate_firmware(mgp, hdr);
544 static int myri10ge_load_firmware(struct myri10ge_priv *mgp)
546 char __iomem *submit;
548 u32 dma_low, dma_high, size;
552 status = myri10ge_load_hotplug_firmware(mgp, &size);
554 dev_warn(&mgp->pdev->dev, "hotplug firmware loading failed\n");
556 /* Do not attempt to adopt firmware if there
561 status = myri10ge_adopt_running_firmware(mgp);
563 dev_err(&mgp->pdev->dev,
564 "failed to adopt running firmware\n");
567 dev_info(&mgp->pdev->dev,
568 "Successfully adopted running firmware\n");
569 if (mgp->tx.boundary == 4096) {
570 dev_warn(&mgp->pdev->dev,
571 "Using firmware currently running on NIC"
573 dev_warn(&mgp->pdev->dev,
574 "performance consider loading optimized "
576 dev_warn(&mgp->pdev->dev, "via hotplug\n");
579 mgp->fw_name = "adopted";
580 mgp->tx.boundary = 2048;
584 /* clear confirmation addr */
588 /* send a reload command to the bootstrap MCP, and wait for the
589 * response in the confirmation address. The firmware should
590 * write a -1 there to indicate it is alive and well
592 dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
593 dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
595 buf[0] = htonl(dma_high); /* confirm addr MSW */
596 buf[1] = htonl(dma_low); /* confirm addr LSW */
597 buf[2] = htonl(MYRI10GE_NO_CONFIRM_DATA); /* confirm data */
599 /* FIX: All newest firmware should un-protect the bottom of
600 * the sram before handoff. However, the very first interfaces
601 * do not. Therefore the handoff copy must skip the first 8 bytes
603 buf[3] = htonl(MYRI10GE_FW_OFFSET + 8); /* where the code starts */
604 buf[4] = htonl(size - 8); /* length of code */
605 buf[5] = htonl(8); /* where to copy to */
606 buf[6] = htonl(0); /* where to jump to */
608 submit = mgp->sram + 0xfc0000;
610 myri10ge_pio_copy(submit, &buf, sizeof(buf));
615 while (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA && i < 20) {
619 if (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA) {
620 dev_err(&mgp->pdev->dev, "handoff failed\n");
623 dev_info(&mgp->pdev->dev, "handoff confirmed\n");
624 myri10ge_dummy_rdma(mgp, mgp->tx.boundary != 4096);
629 static int myri10ge_update_mac_address(struct myri10ge_priv *mgp, u8 * addr)
631 struct myri10ge_cmd cmd;
634 cmd.data0 = ((addr[0] << 24) | (addr[1] << 16)
635 | (addr[2] << 8) | addr[3]);
637 cmd.data1 = ((addr[4] << 8) | (addr[5]));
639 status = myri10ge_send_cmd(mgp, MXGEFW_SET_MAC_ADDRESS, &cmd, 0);
643 static int myri10ge_change_pause(struct myri10ge_priv *mgp, int pause)
645 struct myri10ge_cmd cmd;
648 ctl = pause ? MXGEFW_ENABLE_FLOW_CONTROL : MXGEFW_DISABLE_FLOW_CONTROL;
649 status = myri10ge_send_cmd(mgp, ctl, &cmd, 0);
653 "myri10ge: %s: Failed to set flow control mode\n",
662 myri10ge_change_promisc(struct myri10ge_priv *mgp, int promisc, int atomic)
664 struct myri10ge_cmd cmd;
667 ctl = promisc ? MXGEFW_ENABLE_PROMISC : MXGEFW_DISABLE_PROMISC;
668 status = myri10ge_send_cmd(mgp, ctl, &cmd, atomic);
670 printk(KERN_ERR "myri10ge: %s: Failed to set promisc mode\n",
674 static int myri10ge_reset(struct myri10ge_priv *mgp)
676 struct myri10ge_cmd cmd;
681 /* try to send a reset command to the card to see if it
683 memset(&cmd, 0, sizeof(cmd));
684 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_RESET, &cmd, 0);
686 dev_err(&mgp->pdev->dev, "failed reset\n");
690 /* Now exchange information about interrupts */
692 bytes = myri10ge_max_intr_slots * sizeof(*mgp->rx_done.entry);
693 memset(mgp->rx_done.entry, 0, bytes);
694 cmd.data0 = (u32) bytes;
695 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_SIZE, &cmd, 0);
696 cmd.data0 = MYRI10GE_LOWPART_TO_U32(mgp->rx_done.bus);
697 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(mgp->rx_done.bus);
698 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_DMA, &cmd, 0);
701 myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_IRQ_ACK_OFFSET, &cmd, 0);
702 mgp->irq_claim = (__iomem u32 *) (mgp->sram + cmd.data0);
703 if (!mgp->msi_enabled) {
704 status |= myri10ge_send_cmd
705 (mgp, MXGEFW_CMD_GET_IRQ_DEASSERT_OFFSET, &cmd, 0);
706 mgp->irq_deassert = (__iomem u32 *) (mgp->sram + cmd.data0);
709 status |= myri10ge_send_cmd
710 (mgp, MXGEFW_CMD_GET_INTR_COAL_DELAY_OFFSET, &cmd, 0);
711 mgp->intr_coal_delay_ptr = (__iomem u32 *) (mgp->sram + cmd.data0);
713 dev_err(&mgp->pdev->dev, "failed set interrupt parameters\n");
716 __raw_writel(htonl(mgp->intr_coal_delay), mgp->intr_coal_delay_ptr);
718 /* Run a small DMA test.
719 * The magic multipliers to the length tell the firmware
720 * to do DMA read, write, or read+write tests. The
721 * results are returned in cmd.data0. The upper 16
722 * bits or the return is the number of transfers completed.
723 * The lower 16 bits is the time in 0.5us ticks that the
724 * transfers took to complete.
727 len = mgp->tx.boundary;
729 cmd.data0 = MYRI10GE_LOWPART_TO_U32(mgp->rx_done.bus);
730 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(mgp->rx_done.bus);
731 cmd.data2 = len * 0x10000;
732 status = myri10ge_send_cmd(mgp, MXGEFW_DMA_TEST, &cmd, 0);
734 mgp->read_dma = ((cmd.data0 >> 16) * len * 2) /
735 (cmd.data0 & 0xffff);
737 dev_warn(&mgp->pdev->dev, "DMA read benchmark failed: %d\n",
739 cmd.data0 = MYRI10GE_LOWPART_TO_U32(mgp->rx_done.bus);
740 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(mgp->rx_done.bus);
741 cmd.data2 = len * 0x1;
742 status = myri10ge_send_cmd(mgp, MXGEFW_DMA_TEST, &cmd, 0);
744 mgp->write_dma = ((cmd.data0 >> 16) * len * 2) /
745 (cmd.data0 & 0xffff);
747 dev_warn(&mgp->pdev->dev, "DMA write benchmark failed: %d\n",
750 cmd.data0 = MYRI10GE_LOWPART_TO_U32(mgp->rx_done.bus);
751 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(mgp->rx_done.bus);
752 cmd.data2 = len * 0x10001;
753 status = myri10ge_send_cmd(mgp, MXGEFW_DMA_TEST, &cmd, 0);
755 mgp->read_write_dma = ((cmd.data0 >> 16) * len * 2 * 2) /
756 (cmd.data0 & 0xffff);
758 dev_warn(&mgp->pdev->dev,
759 "DMA read/write benchmark failed: %d\n", status);
761 memset(mgp->rx_done.entry, 0, bytes);
763 /* reset mcp/driver shared state back to 0 */
766 mgp->tx.pkt_start = 0;
767 mgp->tx.pkt_done = 0;
769 mgp->rx_small.cnt = 0;
770 mgp->rx_done.idx = 0;
771 mgp->rx_done.cnt = 0;
772 status = myri10ge_update_mac_address(mgp, mgp->dev->dev_addr);
773 myri10ge_change_promisc(mgp, 0, 0);
774 myri10ge_change_pause(mgp, mgp->pause);
779 myri10ge_submit_8rx(struct mcp_kreq_ether_recv __iomem * dst,
780 struct mcp_kreq_ether_recv *src)
785 src->addr_low = DMA_32BIT_MASK;
786 myri10ge_pio_copy(dst, src, 8 * sizeof(*src));
789 __raw_writel(low, &dst->addr_low);
794 * Set of routines to get a new receive buffer. Any buffer which
795 * crosses a 4KB boundary must start on a 4KB boundary due to PCIe
796 * wdma restrictions. We also try to align any smaller allocation to
797 * at least a 16 byte boundary for efficiency. We assume the linux
798 * memory allocator works by powers of 2, and will not return memory
799 * smaller than 2KB which crosses a 4KB boundary. If it does, we fall
800 * back to allocating 2x as much space as required.
802 * We intend to replace large (>4KB) skb allocations by using
803 * pages directly and building a fraglist in the near future.
806 static inline struct sk_buff *myri10ge_alloc_big(int bytes)
809 unsigned long data, roundup;
811 skb = dev_alloc_skb(bytes + 4096 + MXGEFW_PAD);
815 /* Correct skb->truesize so that socket buffer
816 * accounting is not confused the rounding we must
817 * do to satisfy alignment constraints.
819 skb->truesize -= 4096;
821 data = (unsigned long)(skb->data);
822 roundup = (-data) & (4095);
823 skb_reserve(skb, roundup);
827 /* Allocate 2x as much space as required and use whichever portion
828 * does not cross a 4KB boundary */
829 static inline struct sk_buff *myri10ge_alloc_small_safe(unsigned int bytes)
832 unsigned long data, boundary;
834 skb = dev_alloc_skb(2 * (bytes + MXGEFW_PAD) - 1);
835 if (unlikely(skb == NULL))
838 /* Correct skb->truesize so that socket buffer
839 * accounting is not confused the rounding we must
840 * do to satisfy alignment constraints.
842 skb->truesize -= bytes + MXGEFW_PAD;
844 data = (unsigned long)(skb->data);
845 boundary = (data + 4095UL) & ~4095UL;
846 if ((boundary - data) >= (bytes + MXGEFW_PAD))
849 skb_reserve(skb, boundary - data);
853 /* Allocate just enough space, and verify that the allocated
854 * space does not cross a 4KB boundary */
855 static inline struct sk_buff *myri10ge_alloc_small(int bytes)
858 unsigned long roundup, data, end;
860 skb = dev_alloc_skb(bytes + 16 + MXGEFW_PAD);
861 if (unlikely(skb == NULL))
864 /* Round allocated buffer to 16 byte boundary */
865 data = (unsigned long)(skb->data);
866 roundup = (-data) & 15UL;
867 skb_reserve(skb, roundup);
868 /* Verify that the data buffer does not cross a page boundary */
869 data = (unsigned long)(skb->data);
870 end = data + bytes + MXGEFW_PAD - 1;
871 if (unlikely(((end >> 12) != (data >> 12)) && (data & 4095UL))) {
873 "myri10ge_alloc_small: small skb crossed 4KB boundary\n");
874 myri10ge_skb_cross_4k = 1;
875 dev_kfree_skb_any(skb);
876 skb = myri10ge_alloc_small_safe(bytes);
882 myri10ge_getbuf(struct myri10ge_rx_buf *rx, struct pci_dev *pdev, int bytes,
889 bytes += VLAN_HLEN; /* account for 802.1q vlan tag */
891 if ((bytes + MXGEFW_PAD) > (4096 - 16) /* linux overhead */ )
892 skb = myri10ge_alloc_big(bytes);
893 else if (myri10ge_skb_cross_4k)
894 skb = myri10ge_alloc_small_safe(bytes);
896 skb = myri10ge_alloc_small(bytes);
898 if (unlikely(skb == NULL)) {
904 /* set len so that it only covers the area we
905 * need mapped for DMA */
906 len = bytes + MXGEFW_PAD;
908 bus = pci_map_single(pdev, skb->data, len, PCI_DMA_FROMDEVICE);
909 rx->info[idx].skb = skb;
910 pci_unmap_addr_set(&rx->info[idx], bus, bus);
911 pci_unmap_len_set(&rx->info[idx], len, len);
912 rx->shadow[idx].addr_low = htonl(MYRI10GE_LOWPART_TO_U32(bus));
913 rx->shadow[idx].addr_high = htonl(MYRI10GE_HIGHPART_TO_U32(bus));
916 /* copy 8 descriptors (64-bytes) to the mcp at a time */
917 if ((idx & 7) == 7) {
918 if (rx->wc_fifo == NULL)
919 myri10ge_submit_8rx(&rx->lanai[idx - 7],
920 &rx->shadow[idx - 7]);
923 myri10ge_pio_copy(rx->wc_fifo,
924 &rx->shadow[idx - 7], 64);
930 static inline void myri10ge_vlan_ip_csum(struct sk_buff *skb, u16 hw_csum)
932 struct vlan_hdr *vh = (struct vlan_hdr *)(skb->data);
934 if ((skb->protocol == ntohs(ETH_P_8021Q)) &&
935 (vh->h_vlan_encapsulated_proto == htons(ETH_P_IP) ||
936 vh->h_vlan_encapsulated_proto == htons(ETH_P_IPV6))) {
938 skb->ip_summed = CHECKSUM_HW;
942 static inline unsigned long
943 myri10ge_rx_done(struct myri10ge_priv *mgp, struct myri10ge_rx_buf *rx,
944 int bytes, int len, int csum)
950 idx = rx->cnt & rx->mask;
953 /* save a pointer to the received skb */
954 skb = rx->info[idx].skb;
955 bus = pci_unmap_addr(&rx->info[idx], bus);
956 unmap_len = pci_unmap_len(&rx->info[idx], len);
958 /* try to replace the received skb */
959 if (myri10ge_getbuf(rx, mgp->pdev, bytes, idx)) {
960 /* drop the frame -- the old skbuf is re-cycled */
961 mgp->stats.rx_dropped += 1;
965 /* unmap the recvd skb */
966 pci_unmap_single(mgp->pdev, bus, unmap_len, PCI_DMA_FROMDEVICE);
968 /* mcp implicitly skips 1st bytes so that packet is properly
970 skb_reserve(skb, MXGEFW_PAD);
972 /* set the length of the frame */
975 skb->protocol = eth_type_trans(skb, mgp->dev);
977 if (mgp->csum_flag) {
978 if ((skb->protocol == ntohs(ETH_P_IP)) ||
979 (skb->protocol == ntohs(ETH_P_IPV6))) {
980 skb->csum = ntohs((u16) csum);
981 skb->ip_summed = CHECKSUM_HW;
983 myri10ge_vlan_ip_csum(skb, ntohs((u16) csum));
986 netif_receive_skb(skb);
987 mgp->dev->last_rx = jiffies;
991 static inline void myri10ge_tx_done(struct myri10ge_priv *mgp, int mcp_index)
993 struct pci_dev *pdev = mgp->pdev;
994 struct myri10ge_tx_buf *tx = &mgp->tx;
999 while (tx->pkt_done != mcp_index) {
1000 idx = tx->done & tx->mask;
1001 skb = tx->info[idx].skb;
1004 tx->info[idx].skb = NULL;
1005 if (tx->info[idx].last) {
1007 tx->info[idx].last = 0;
1010 len = pci_unmap_len(&tx->info[idx], len);
1011 pci_unmap_len_set(&tx->info[idx], len, 0);
1013 mgp->stats.tx_bytes += skb->len;
1014 mgp->stats.tx_packets++;
1015 dev_kfree_skb_irq(skb);
1017 pci_unmap_single(pdev,
1018 pci_unmap_addr(&tx->info[idx],
1023 pci_unmap_page(pdev,
1024 pci_unmap_addr(&tx->info[idx],
1029 /* limit potential for livelock by only handling
1030 * 2 full tx rings per call */
1031 if (unlikely(++limit > 2 * tx->mask))
1034 /* start the queue if we've stopped it */
1035 if (netif_queue_stopped(mgp->dev)
1036 && tx->req - tx->done < (tx->mask >> 1)) {
1038 netif_wake_queue(mgp->dev);
1042 static inline void myri10ge_clean_rx_done(struct myri10ge_priv *mgp, int *limit)
1044 struct myri10ge_rx_done *rx_done = &mgp->rx_done;
1045 unsigned long rx_bytes = 0;
1046 unsigned long rx_packets = 0;
1047 unsigned long rx_ok;
1049 int idx = rx_done->idx;
1050 int cnt = rx_done->cnt;
1054 while (rx_done->entry[idx].length != 0 && *limit != 0) {
1055 length = ntohs(rx_done->entry[idx].length);
1056 rx_done->entry[idx].length = 0;
1057 checksum = ntohs(rx_done->entry[idx].checksum);
1058 if (length <= mgp->small_bytes)
1059 rx_ok = myri10ge_rx_done(mgp, &mgp->rx_small,
1063 rx_ok = myri10ge_rx_done(mgp, &mgp->rx_big,
1064 mgp->dev->mtu + ETH_HLEN,
1066 rx_packets += rx_ok;
1067 rx_bytes += rx_ok * (unsigned long)length;
1069 idx = cnt & (myri10ge_max_intr_slots - 1);
1071 /* limit potential for livelock by only handling a
1072 * limited number of frames. */
1077 mgp->stats.rx_packets += rx_packets;
1078 mgp->stats.rx_bytes += rx_bytes;
1081 static inline void myri10ge_check_statblock(struct myri10ge_priv *mgp)
1083 struct mcp_irq_data *stats = mgp->fw_stats;
1085 if (unlikely(stats->stats_updated)) {
1086 if (mgp->link_state != stats->link_up) {
1087 mgp->link_state = stats->link_up;
1088 if (mgp->link_state) {
1089 printk(KERN_INFO "myri10ge: %s: link up\n",
1091 netif_carrier_on(mgp->dev);
1093 printk(KERN_INFO "myri10ge: %s: link down\n",
1095 netif_carrier_off(mgp->dev);
1098 if (mgp->rdma_tags_available !=
1099 ntohl(mgp->fw_stats->rdma_tags_available)) {
1100 mgp->rdma_tags_available =
1101 ntohl(mgp->fw_stats->rdma_tags_available);
1102 printk(KERN_WARNING "myri10ge: %s: RDMA timed out! "
1103 "%d tags left\n", mgp->dev->name,
1104 mgp->rdma_tags_available);
1106 mgp->down_cnt += stats->link_down;
1107 if (stats->link_down)
1108 wake_up(&mgp->down_wq);
1112 static int myri10ge_poll(struct net_device *netdev, int *budget)
1114 struct myri10ge_priv *mgp = netdev_priv(netdev);
1115 struct myri10ge_rx_done *rx_done = &mgp->rx_done;
1116 int limit, orig_limit, work_done;
1118 /* process as many rx events as NAPI will allow */
1119 limit = min(*budget, netdev->quota);
1121 myri10ge_clean_rx_done(mgp, &limit);
1122 work_done = orig_limit - limit;
1123 *budget -= work_done;
1124 netdev->quota -= work_done;
1126 if (rx_done->entry[rx_done->idx].length == 0 || !netif_running(netdev)) {
1127 netif_rx_complete(netdev);
1128 __raw_writel(htonl(3), mgp->irq_claim);
1134 static irqreturn_t myri10ge_intr(int irq, void *arg, struct pt_regs *regs)
1136 struct myri10ge_priv *mgp = arg;
1137 struct mcp_irq_data *stats = mgp->fw_stats;
1138 struct myri10ge_tx_buf *tx = &mgp->tx;
1139 u32 send_done_count;
1142 /* make sure it is our IRQ, and that the DMA has finished */
1143 if (unlikely(!stats->valid))
1146 /* low bit indicates receives are present, so schedule
1147 * napi poll handler */
1148 if (stats->valid & 1)
1149 netif_rx_schedule(mgp->dev);
1151 if (!mgp->msi_enabled) {
1152 __raw_writel(0, mgp->irq_deassert);
1153 if (!myri10ge_deassert_wait)
1159 /* Wait for IRQ line to go low, if using INTx */
1163 /* check for transmit completes and receives */
1164 send_done_count = ntohl(stats->send_done_count);
1165 if (send_done_count != tx->pkt_done)
1166 myri10ge_tx_done(mgp, (int)send_done_count);
1167 if (unlikely(i > myri10ge_max_irq_loops)) {
1168 printk(KERN_WARNING "myri10ge: %s: irq stuck?\n",
1171 schedule_work(&mgp->watchdog_work);
1173 if (likely(stats->valid == 0))
1179 myri10ge_check_statblock(mgp);
1181 __raw_writel(htonl(3), mgp->irq_claim + 1);
1182 return (IRQ_HANDLED);
1186 myri10ge_get_settings(struct net_device *netdev, struct ethtool_cmd *cmd)
1188 cmd->autoneg = AUTONEG_DISABLE;
1189 cmd->speed = SPEED_10000;
1190 cmd->duplex = DUPLEX_FULL;
1195 myri10ge_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
1197 struct myri10ge_priv *mgp = netdev_priv(netdev);
1199 strlcpy(info->driver, "myri10ge", sizeof(info->driver));
1200 strlcpy(info->version, MYRI10GE_VERSION_STR, sizeof(info->version));
1201 strlcpy(info->fw_version, mgp->fw_version, sizeof(info->fw_version));
1202 strlcpy(info->bus_info, pci_name(mgp->pdev), sizeof(info->bus_info));
1206 myri10ge_get_coalesce(struct net_device *netdev, struct ethtool_coalesce *coal)
1208 struct myri10ge_priv *mgp = netdev_priv(netdev);
1209 coal->rx_coalesce_usecs = mgp->intr_coal_delay;
1214 myri10ge_set_coalesce(struct net_device *netdev, struct ethtool_coalesce *coal)
1216 struct myri10ge_priv *mgp = netdev_priv(netdev);
1218 mgp->intr_coal_delay = coal->rx_coalesce_usecs;
1219 __raw_writel(htonl(mgp->intr_coal_delay), mgp->intr_coal_delay_ptr);
1224 myri10ge_get_pauseparam(struct net_device *netdev,
1225 struct ethtool_pauseparam *pause)
1227 struct myri10ge_priv *mgp = netdev_priv(netdev);
1230 pause->rx_pause = mgp->pause;
1231 pause->tx_pause = mgp->pause;
1235 myri10ge_set_pauseparam(struct net_device *netdev,
1236 struct ethtool_pauseparam *pause)
1238 struct myri10ge_priv *mgp = netdev_priv(netdev);
1240 if (pause->tx_pause != mgp->pause)
1241 return myri10ge_change_pause(mgp, pause->tx_pause);
1242 if (pause->rx_pause != mgp->pause)
1243 return myri10ge_change_pause(mgp, pause->tx_pause);
1244 if (pause->autoneg != 0)
1250 myri10ge_get_ringparam(struct net_device *netdev,
1251 struct ethtool_ringparam *ring)
1253 struct myri10ge_priv *mgp = netdev_priv(netdev);
1255 ring->rx_mini_max_pending = mgp->rx_small.mask + 1;
1256 ring->rx_max_pending = mgp->rx_big.mask + 1;
1257 ring->rx_jumbo_max_pending = 0;
1258 ring->tx_max_pending = mgp->rx_small.mask + 1;
1259 ring->rx_mini_pending = ring->rx_mini_max_pending;
1260 ring->rx_pending = ring->rx_max_pending;
1261 ring->rx_jumbo_pending = ring->rx_jumbo_max_pending;
1262 ring->tx_pending = ring->tx_max_pending;
1265 static u32 myri10ge_get_rx_csum(struct net_device *netdev)
1267 struct myri10ge_priv *mgp = netdev_priv(netdev);
1274 static int myri10ge_set_rx_csum(struct net_device *netdev, u32 csum_enabled)
1276 struct myri10ge_priv *mgp = netdev_priv(netdev);
1278 mgp->csum_flag = MXGEFW_FLAGS_CKSUM;
1284 static const char myri10ge_gstrings_stats[][ETH_GSTRING_LEN] = {
1285 "rx_packets", "tx_packets", "rx_bytes", "tx_bytes", "rx_errors",
1286 "tx_errors", "rx_dropped", "tx_dropped", "multicast", "collisions",
1287 "rx_length_errors", "rx_over_errors", "rx_crc_errors",
1288 "rx_frame_errors", "rx_fifo_errors", "rx_missed_errors",
1289 "tx_aborted_errors", "tx_carrier_errors", "tx_fifo_errors",
1290 "tx_heartbeat_errors", "tx_window_errors",
1291 /* device-specific stats */
1292 "read_dma_bw_MBs", "write_dma_bw_MBs", "read_write_dma_bw_MBs",
1293 "serial_number", "tx_pkt_start", "tx_pkt_done",
1294 "tx_req", "tx_done", "rx_small_cnt", "rx_big_cnt",
1295 "wake_queue", "stop_queue", "watchdog_resets", "tx_linearized",
1296 "link_up", "dropped_link_overflow", "dropped_link_error_or_filtered",
1297 "dropped_runt", "dropped_overrun", "dropped_no_small_buffer",
1298 "dropped_no_big_buffer"
1301 #define MYRI10GE_NET_STATS_LEN 21
1302 #define MYRI10GE_STATS_LEN sizeof(myri10ge_gstrings_stats) / ETH_GSTRING_LEN
1305 myri10ge_get_strings(struct net_device *netdev, u32 stringset, u8 * data)
1307 switch (stringset) {
1309 memcpy(data, *myri10ge_gstrings_stats,
1310 sizeof(myri10ge_gstrings_stats));
1315 static int myri10ge_get_stats_count(struct net_device *netdev)
1317 return MYRI10GE_STATS_LEN;
1321 myri10ge_get_ethtool_stats(struct net_device *netdev,
1322 struct ethtool_stats *stats, u64 * data)
1324 struct myri10ge_priv *mgp = netdev_priv(netdev);
1327 for (i = 0; i < MYRI10GE_NET_STATS_LEN; i++)
1328 data[i] = ((unsigned long *)&mgp->stats)[i];
1330 data[i++] = (unsigned int)mgp->read_dma;
1331 data[i++] = (unsigned int)mgp->write_dma;
1332 data[i++] = (unsigned int)mgp->read_write_dma;
1333 data[i++] = (unsigned int)mgp->serial_number;
1334 data[i++] = (unsigned int)mgp->tx.pkt_start;
1335 data[i++] = (unsigned int)mgp->tx.pkt_done;
1336 data[i++] = (unsigned int)mgp->tx.req;
1337 data[i++] = (unsigned int)mgp->tx.done;
1338 data[i++] = (unsigned int)mgp->rx_small.cnt;
1339 data[i++] = (unsigned int)mgp->rx_big.cnt;
1340 data[i++] = (unsigned int)mgp->wake_queue;
1341 data[i++] = (unsigned int)mgp->stop_queue;
1342 data[i++] = (unsigned int)mgp->watchdog_resets;
1343 data[i++] = (unsigned int)mgp->tx_linearized;
1344 data[i++] = (unsigned int)ntohl(mgp->fw_stats->link_up);
1345 data[i++] = (unsigned int)ntohl(mgp->fw_stats->dropped_link_overflow);
1347 (unsigned int)ntohl(mgp->fw_stats->dropped_link_error_or_filtered);
1348 data[i++] = (unsigned int)ntohl(mgp->fw_stats->dropped_runt);
1349 data[i++] = (unsigned int)ntohl(mgp->fw_stats->dropped_overrun);
1350 data[i++] = (unsigned int)ntohl(mgp->fw_stats->dropped_no_small_buffer);
1351 data[i++] = (unsigned int)ntohl(mgp->fw_stats->dropped_no_big_buffer);
1354 static struct ethtool_ops myri10ge_ethtool_ops = {
1355 .get_settings = myri10ge_get_settings,
1356 .get_drvinfo = myri10ge_get_drvinfo,
1357 .get_coalesce = myri10ge_get_coalesce,
1358 .set_coalesce = myri10ge_set_coalesce,
1359 .get_pauseparam = myri10ge_get_pauseparam,
1360 .set_pauseparam = myri10ge_set_pauseparam,
1361 .get_ringparam = myri10ge_get_ringparam,
1362 .get_rx_csum = myri10ge_get_rx_csum,
1363 .set_rx_csum = myri10ge_set_rx_csum,
1364 .get_tx_csum = ethtool_op_get_tx_csum,
1365 .set_tx_csum = ethtool_op_set_tx_hw_csum,
1366 .get_sg = ethtool_op_get_sg,
1367 .set_sg = ethtool_op_set_sg,
1369 .get_tso = ethtool_op_get_tso,
1370 .set_tso = ethtool_op_set_tso,
1372 .get_strings = myri10ge_get_strings,
1373 .get_stats_count = myri10ge_get_stats_count,
1374 .get_ethtool_stats = myri10ge_get_ethtool_stats
1377 static int myri10ge_allocate_rings(struct net_device *dev)
1379 struct myri10ge_priv *mgp;
1380 struct myri10ge_cmd cmd;
1381 int tx_ring_size, rx_ring_size;
1382 int tx_ring_entries, rx_ring_entries;
1386 mgp = netdev_priv(dev);
1388 /* get ring sizes */
1390 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SEND_RING_SIZE, &cmd, 0);
1391 tx_ring_size = cmd.data0;
1392 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_RX_RING_SIZE, &cmd, 0);
1393 rx_ring_size = cmd.data0;
1395 tx_ring_entries = tx_ring_size / sizeof(struct mcp_kreq_ether_send);
1396 rx_ring_entries = rx_ring_size / sizeof(struct mcp_dma_addr);
1397 mgp->tx.mask = tx_ring_entries - 1;
1398 mgp->rx_small.mask = mgp->rx_big.mask = rx_ring_entries - 1;
1400 /* allocate the host shadow rings */
1402 bytes = 8 + (MYRI10GE_MAX_SEND_DESC_TSO + 4)
1403 * sizeof(*mgp->tx.req_list);
1404 mgp->tx.req_bytes = kzalloc(bytes, GFP_KERNEL);
1405 if (mgp->tx.req_bytes == NULL)
1406 goto abort_with_nothing;
1408 /* ensure req_list entries are aligned to 8 bytes */
1409 mgp->tx.req_list = (struct mcp_kreq_ether_send *)
1410 ALIGN((unsigned long)mgp->tx.req_bytes, 8);
1412 bytes = rx_ring_entries * sizeof(*mgp->rx_small.shadow);
1413 mgp->rx_small.shadow = kzalloc(bytes, GFP_KERNEL);
1414 if (mgp->rx_small.shadow == NULL)
1415 goto abort_with_tx_req_bytes;
1417 bytes = rx_ring_entries * sizeof(*mgp->rx_big.shadow);
1418 mgp->rx_big.shadow = kzalloc(bytes, GFP_KERNEL);
1419 if (mgp->rx_big.shadow == NULL)
1420 goto abort_with_rx_small_shadow;
1422 /* allocate the host info rings */
1424 bytes = tx_ring_entries * sizeof(*mgp->tx.info);
1425 mgp->tx.info = kzalloc(bytes, GFP_KERNEL);
1426 if (mgp->tx.info == NULL)
1427 goto abort_with_rx_big_shadow;
1429 bytes = rx_ring_entries * sizeof(*mgp->rx_small.info);
1430 mgp->rx_small.info = kzalloc(bytes, GFP_KERNEL);
1431 if (mgp->rx_small.info == NULL)
1432 goto abort_with_tx_info;
1434 bytes = rx_ring_entries * sizeof(*mgp->rx_big.info);
1435 mgp->rx_big.info = kzalloc(bytes, GFP_KERNEL);
1436 if (mgp->rx_big.info == NULL)
1437 goto abort_with_rx_small_info;
1439 /* Fill the receive rings */
1441 for (i = 0; i <= mgp->rx_small.mask; i++) {
1442 status = myri10ge_getbuf(&mgp->rx_small, mgp->pdev,
1443 mgp->small_bytes, i);
1446 "myri10ge: %s: alloced only %d small bufs\n",
1448 goto abort_with_rx_small_ring;
1452 for (i = 0; i <= mgp->rx_big.mask; i++) {
1454 myri10ge_getbuf(&mgp->rx_big, mgp->pdev,
1455 dev->mtu + ETH_HLEN, i);
1458 "myri10ge: %s: alloced only %d big bufs\n",
1460 goto abort_with_rx_big_ring;
1466 abort_with_rx_big_ring:
1467 for (i = 0; i <= mgp->rx_big.mask; i++) {
1468 if (mgp->rx_big.info[i].skb != NULL)
1469 dev_kfree_skb_any(mgp->rx_big.info[i].skb);
1470 if (pci_unmap_len(&mgp->rx_big.info[i], len))
1471 pci_unmap_single(mgp->pdev,
1472 pci_unmap_addr(&mgp->rx_big.info[i],
1474 pci_unmap_len(&mgp->rx_big.info[i],
1476 PCI_DMA_FROMDEVICE);
1479 abort_with_rx_small_ring:
1480 for (i = 0; i <= mgp->rx_small.mask; i++) {
1481 if (mgp->rx_small.info[i].skb != NULL)
1482 dev_kfree_skb_any(mgp->rx_small.info[i].skb);
1483 if (pci_unmap_len(&mgp->rx_small.info[i], len))
1484 pci_unmap_single(mgp->pdev,
1485 pci_unmap_addr(&mgp->rx_small.info[i],
1487 pci_unmap_len(&mgp->rx_small.info[i],
1489 PCI_DMA_FROMDEVICE);
1491 kfree(mgp->rx_big.info);
1493 abort_with_rx_small_info:
1494 kfree(mgp->rx_small.info);
1497 kfree(mgp->tx.info);
1499 abort_with_rx_big_shadow:
1500 kfree(mgp->rx_big.shadow);
1502 abort_with_rx_small_shadow:
1503 kfree(mgp->rx_small.shadow);
1505 abort_with_tx_req_bytes:
1506 kfree(mgp->tx.req_bytes);
1507 mgp->tx.req_bytes = NULL;
1508 mgp->tx.req_list = NULL;
1514 static void myri10ge_free_rings(struct net_device *dev)
1516 struct myri10ge_priv *mgp;
1517 struct sk_buff *skb;
1518 struct myri10ge_tx_buf *tx;
1521 mgp = netdev_priv(dev);
1523 for (i = 0; i <= mgp->rx_big.mask; i++) {
1524 if (mgp->rx_big.info[i].skb != NULL)
1525 dev_kfree_skb_any(mgp->rx_big.info[i].skb);
1526 if (pci_unmap_len(&mgp->rx_big.info[i], len))
1527 pci_unmap_single(mgp->pdev,
1528 pci_unmap_addr(&mgp->rx_big.info[i],
1530 pci_unmap_len(&mgp->rx_big.info[i],
1532 PCI_DMA_FROMDEVICE);
1535 for (i = 0; i <= mgp->rx_small.mask; i++) {
1536 if (mgp->rx_small.info[i].skb != NULL)
1537 dev_kfree_skb_any(mgp->rx_small.info[i].skb);
1538 if (pci_unmap_len(&mgp->rx_small.info[i], len))
1539 pci_unmap_single(mgp->pdev,
1540 pci_unmap_addr(&mgp->rx_small.info[i],
1542 pci_unmap_len(&mgp->rx_small.info[i],
1544 PCI_DMA_FROMDEVICE);
1548 while (tx->done != tx->req) {
1549 idx = tx->done & tx->mask;
1550 skb = tx->info[idx].skb;
1553 tx->info[idx].skb = NULL;
1555 len = pci_unmap_len(&tx->info[idx], len);
1556 pci_unmap_len_set(&tx->info[idx], len, 0);
1558 mgp->stats.tx_dropped++;
1559 dev_kfree_skb_any(skb);
1561 pci_unmap_single(mgp->pdev,
1562 pci_unmap_addr(&tx->info[idx],
1567 pci_unmap_page(mgp->pdev,
1568 pci_unmap_addr(&tx->info[idx],
1573 kfree(mgp->rx_big.info);
1575 kfree(mgp->rx_small.info);
1577 kfree(mgp->tx.info);
1579 kfree(mgp->rx_big.shadow);
1581 kfree(mgp->rx_small.shadow);
1583 kfree(mgp->tx.req_bytes);
1584 mgp->tx.req_bytes = NULL;
1585 mgp->tx.req_list = NULL;
1588 static int myri10ge_open(struct net_device *dev)
1590 struct myri10ge_priv *mgp;
1591 struct myri10ge_cmd cmd;
1592 int status, big_pow2;
1594 mgp = netdev_priv(dev);
1596 if (mgp->running != MYRI10GE_ETH_STOPPED)
1599 mgp->running = MYRI10GE_ETH_STARTING;
1600 status = myri10ge_reset(mgp);
1602 printk(KERN_ERR "myri10ge: %s: failed reset\n", dev->name);
1603 mgp->running = MYRI10GE_ETH_STOPPED;
1607 /* decide what small buffer size to use. For good TCP rx
1608 * performance, it is important to not receive 1514 byte
1609 * frames into jumbo buffers, as it confuses the socket buffer
1610 * accounting code, leading to drops and erratic performance.
1613 if (dev->mtu <= ETH_DATA_LEN)
1614 mgp->small_bytes = 128; /* enough for a TCP header */
1616 mgp->small_bytes = ETH_FRAME_LEN; /* enough for an ETH_DATA_LEN frame */
1618 /* Override the small buffer size? */
1619 if (myri10ge_small_bytes > 0)
1620 mgp->small_bytes = myri10ge_small_bytes;
1622 /* If the user sets an obscenely small MTU, adjust the small
1623 * bytes down to nearly nothing */
1624 if (mgp->small_bytes >= (dev->mtu + ETH_HLEN))
1625 mgp->small_bytes = 64;
1627 /* get the lanai pointers to the send and receive rings */
1629 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SEND_OFFSET, &cmd, 0);
1631 (struct mcp_kreq_ether_send __iomem *)(mgp->sram + cmd.data0);
1634 myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SMALL_RX_OFFSET, &cmd, 0);
1635 mgp->rx_small.lanai =
1636 (struct mcp_kreq_ether_recv __iomem *)(mgp->sram + cmd.data0);
1638 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_BIG_RX_OFFSET, &cmd, 0);
1640 (struct mcp_kreq_ether_recv __iomem *)(mgp->sram + cmd.data0);
1644 "myri10ge: %s: failed to get ring sizes or locations\n",
1646 mgp->running = MYRI10GE_ETH_STOPPED;
1650 if (mgp->mtrr >= 0) {
1651 mgp->tx.wc_fifo = (u8 __iomem *) mgp->sram + 0x200000;
1652 mgp->rx_small.wc_fifo = (u8 __iomem *) mgp->sram + 0x300000;
1653 mgp->rx_big.wc_fifo = (u8 __iomem *) mgp->sram + 0x340000;
1655 mgp->tx.wc_fifo = NULL;
1656 mgp->rx_small.wc_fifo = NULL;
1657 mgp->rx_big.wc_fifo = NULL;
1660 status = myri10ge_allocate_rings(dev);
1662 goto abort_with_nothing;
1664 /* Firmware needs the big buff size as a power of 2. Lie and
1665 * tell him the buffer is larger, because we only use 1
1666 * buffer/pkt, and the mtu will prevent overruns.
1668 big_pow2 = dev->mtu + ETH_HLEN + MXGEFW_PAD;
1669 while ((big_pow2 & (big_pow2 - 1)) != 0)
1672 /* now give firmware buffers sizes, and MTU */
1673 cmd.data0 = dev->mtu + ETH_HLEN + VLAN_HLEN;
1674 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_MTU, &cmd, 0);
1675 cmd.data0 = mgp->small_bytes;
1677 myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_SMALL_BUFFER_SIZE, &cmd, 0);
1678 cmd.data0 = big_pow2;
1680 myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_BIG_BUFFER_SIZE, &cmd, 0);
1682 printk(KERN_ERR "myri10ge: %s: Couldn't set buffer sizes\n",
1684 goto abort_with_rings;
1687 cmd.data0 = MYRI10GE_LOWPART_TO_U32(mgp->fw_stats_bus);
1688 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(mgp->fw_stats_bus);
1689 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_STATS_DMA, &cmd, 0);
1691 printk(KERN_ERR "myri10ge: %s: Couldn't set stats DMA\n",
1693 goto abort_with_rings;
1696 mgp->link_state = -1;
1697 mgp->rdma_tags_available = 15;
1699 netif_poll_enable(mgp->dev); /* must happen prior to any irq */
1701 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ETHERNET_UP, &cmd, 0);
1703 printk(KERN_ERR "myri10ge: %s: Couldn't bring up link\n",
1705 goto abort_with_rings;
1708 mgp->wake_queue = 0;
1709 mgp->stop_queue = 0;
1710 mgp->running = MYRI10GE_ETH_RUNNING;
1711 mgp->watchdog_timer.expires = jiffies + myri10ge_watchdog_timeout * HZ;
1712 add_timer(&mgp->watchdog_timer);
1713 netif_wake_queue(dev);
1717 myri10ge_free_rings(dev);
1720 mgp->running = MYRI10GE_ETH_STOPPED;
1724 static int myri10ge_close(struct net_device *dev)
1726 struct myri10ge_priv *mgp;
1727 struct myri10ge_cmd cmd;
1728 int status, old_down_cnt;
1730 mgp = netdev_priv(dev);
1732 if (mgp->running != MYRI10GE_ETH_RUNNING)
1735 if (mgp->tx.req_bytes == NULL)
1738 del_timer_sync(&mgp->watchdog_timer);
1739 mgp->running = MYRI10GE_ETH_STOPPING;
1740 netif_poll_disable(mgp->dev);
1741 netif_carrier_off(dev);
1742 netif_stop_queue(dev);
1743 old_down_cnt = mgp->down_cnt;
1745 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ETHERNET_DOWN, &cmd, 0);
1747 printk(KERN_ERR "myri10ge: %s: Couldn't bring down link\n",
1750 wait_event_timeout(mgp->down_wq, old_down_cnt != mgp->down_cnt, HZ);
1751 if (old_down_cnt == mgp->down_cnt)
1752 printk(KERN_ERR "myri10ge: %s never got down irq\n", dev->name);
1754 netif_tx_disable(dev);
1756 myri10ge_free_rings(dev);
1758 mgp->running = MYRI10GE_ETH_STOPPED;
1762 /* copy an array of struct mcp_kreq_ether_send's to the mcp. Copy
1763 * backwards one at a time and handle ring wraps */
1766 myri10ge_submit_req_backwards(struct myri10ge_tx_buf *tx,
1767 struct mcp_kreq_ether_send *src, int cnt)
1769 int idx, starting_slot;
1770 starting_slot = tx->req;
1773 idx = (starting_slot + cnt) & tx->mask;
1774 myri10ge_pio_copy(&tx->lanai[idx], &src[cnt], sizeof(*src));
1780 * copy an array of struct mcp_kreq_ether_send's to the mcp. Copy
1781 * at most 32 bytes at a time, so as to avoid involving the software
1782 * pio handler in the nic. We re-write the first segment's flags
1783 * to mark them valid only after writing the entire chain.
1787 myri10ge_submit_req(struct myri10ge_tx_buf *tx, struct mcp_kreq_ether_send *src,
1791 struct mcp_kreq_ether_send __iomem *dstp, *dst;
1792 struct mcp_kreq_ether_send *srcp;
1795 idx = tx->req & tx->mask;
1797 last_flags = src->flags;
1800 dst = dstp = &tx->lanai[idx];
1803 if ((idx + cnt) < tx->mask) {
1804 for (i = 0; i < (cnt - 1); i += 2) {
1805 myri10ge_pio_copy(dstp, srcp, 2 * sizeof(*src));
1806 mb(); /* force write every 32 bytes */
1811 /* submit all but the first request, and ensure
1812 * that it is submitted below */
1813 myri10ge_submit_req_backwards(tx, src, cnt);
1817 /* submit the first request */
1818 myri10ge_pio_copy(dstp, srcp, sizeof(*src));
1819 mb(); /* barrier before setting valid flag */
1822 /* re-write the last 32-bits with the valid flags */
1823 src->flags = last_flags;
1824 __raw_writel(*((u32 *) src + 3), (u32 __iomem *) dst + 3);
1830 myri10ge_submit_req_wc(struct myri10ge_tx_buf *tx,
1831 struct mcp_kreq_ether_send *src, int cnt)
1836 myri10ge_pio_copy(tx->wc_fifo, src, 64);
1842 /* pad it to 64 bytes. The src is 64 bytes bigger than it
1843 * needs to be so that we don't overrun it */
1844 myri10ge_pio_copy(tx->wc_fifo + (cnt << 18), src, 64);
1850 * Transmit a packet. We need to split the packet so that a single
1851 * segment does not cross myri10ge->tx.boundary, so this makes segment
1852 * counting tricky. So rather than try to count segments up front, we
1853 * just give up if there are too few segments to hold a reasonably
1854 * fragmented packet currently available. If we run
1855 * out of segments while preparing a packet for DMA, we just linearize
1859 static int myri10ge_xmit(struct sk_buff *skb, struct net_device *dev)
1861 struct myri10ge_priv *mgp = netdev_priv(dev);
1862 struct mcp_kreq_ether_send *req;
1863 struct myri10ge_tx_buf *tx = &mgp->tx;
1864 struct skb_frag_struct *frag;
1866 u32 low, high_swapped;
1868 int idx, last_idx, avail, frag_cnt, frag_idx, count, mss, max_segments;
1869 u16 pseudo_hdr_offset, cksum_offset;
1870 int cum_len, seglen, boundary, rdma_count;
1875 avail = tx->mask - 1 - (tx->req - tx->done);
1878 max_segments = MXGEFW_MAX_SEND_DESC;
1881 if (skb->len > (dev->mtu + ETH_HLEN)) {
1882 mss = skb_shinfo(skb)->tso_size;
1884 max_segments = MYRI10GE_MAX_SEND_DESC_TSO;
1886 #endif /*NETIF_F_TSO */
1888 if ((unlikely(avail < max_segments))) {
1889 /* we are out of transmit resources */
1891 netif_stop_queue(dev);
1895 /* Setup checksum offloading, if needed */
1897 pseudo_hdr_offset = 0;
1899 flags = (MXGEFW_FLAGS_NO_TSO | MXGEFW_FLAGS_FIRST);
1900 if (likely(skb->ip_summed == CHECKSUM_HW)) {
1901 cksum_offset = (skb->h.raw - skb->data);
1902 pseudo_hdr_offset = (skb->h.raw + skb->csum) - skb->data;
1903 /* If the headers are excessively large, then we must
1904 * fall back to a software checksum */
1905 if (unlikely(cksum_offset > 255 || pseudo_hdr_offset > 127)) {
1906 if (skb_checksum_help(skb, 0))
1909 pseudo_hdr_offset = 0;
1911 pseudo_hdr_offset = htons(pseudo_hdr_offset);
1912 odd_flag = MXGEFW_FLAGS_ALIGN_ODD;
1913 flags |= MXGEFW_FLAGS_CKSUM;
1920 if (mss) { /* TSO */
1921 /* this removes any CKSUM flag from before */
1922 flags = (MXGEFW_FLAGS_TSO_HDR | MXGEFW_FLAGS_FIRST);
1924 /* negative cum_len signifies to the
1925 * send loop that we are still in the
1926 * header portion of the TSO packet.
1927 * TSO header must be at most 134 bytes long */
1928 cum_len = -((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
1930 /* for TSO, pseudo_hdr_offset holds mss.
1931 * The firmware figures out where to put
1932 * the checksum by parsing the header. */
1933 pseudo_hdr_offset = htons(mss);
1935 #endif /*NETIF_F_TSO */
1936 /* Mark small packets, and pad out tiny packets */
1937 if (skb->len <= MXGEFW_SEND_SMALL_SIZE) {
1938 flags |= MXGEFW_FLAGS_SMALL;
1940 /* pad frames to at least ETH_ZLEN bytes */
1941 if (unlikely(skb->len < ETH_ZLEN)) {
1942 skb = skb_padto(skb, ETH_ZLEN);
1944 /* The packet is gone, so we must
1946 mgp->stats.tx_dropped += 1;
1949 /* adjust the len to account for the zero pad
1950 * so that the nic can know how long it is */
1951 skb->len = ETH_ZLEN;
1955 /* map the skb for DMA */
1956 len = skb->len - skb->data_len;
1957 idx = tx->req & tx->mask;
1958 tx->info[idx].skb = skb;
1959 bus = pci_map_single(mgp->pdev, skb->data, len, PCI_DMA_TODEVICE);
1960 pci_unmap_addr_set(&tx->info[idx], bus, bus);
1961 pci_unmap_len_set(&tx->info[idx], len, len);
1963 frag_cnt = skb_shinfo(skb)->nr_frags;
1968 /* "rdma_count" is the number of RDMAs belonging to the
1969 * current packet BEFORE the current send request. For
1970 * non-TSO packets, this is equal to "count".
1971 * For TSO packets, rdma_count needs to be reset
1972 * to 0 after a segment cut.
1974 * The rdma_count field of the send request is
1975 * the number of RDMAs of the packet starting at
1976 * that request. For TSO send requests with one ore more cuts
1977 * in the middle, this is the number of RDMAs starting
1978 * after the last cut in the request. All previous
1979 * segments before the last cut implicitly have 1 RDMA.
1981 * Since the number of RDMAs is not known beforehand,
1982 * it must be filled-in retroactively - after each
1983 * segmentation cut or at the end of the entire packet.
1987 /* Break the SKB or Fragment up into pieces which
1988 * do not cross mgp->tx.boundary */
1989 low = MYRI10GE_LOWPART_TO_U32(bus);
1990 high_swapped = htonl(MYRI10GE_HIGHPART_TO_U32(bus));
1995 if (unlikely(count == max_segments))
1996 goto abort_linearize;
1998 boundary = (low + tx->boundary) & ~(tx->boundary - 1);
1999 seglen = boundary - low;
2002 flags_next = flags & ~MXGEFW_FLAGS_FIRST;
2003 cum_len_next = cum_len + seglen;
2005 if (mss) { /* TSO */
2006 (req - rdma_count)->rdma_count = rdma_count + 1;
2008 if (likely(cum_len >= 0)) { /* payload */
2009 int next_is_first, chop;
2011 chop = (cum_len_next > mss);
2012 cum_len_next = cum_len_next % mss;
2013 next_is_first = (cum_len_next == 0);
2014 flags |= chop * MXGEFW_FLAGS_TSO_CHOP;
2015 flags_next |= next_is_first *
2017 rdma_count |= -(chop | next_is_first);
2018 rdma_count += chop & !next_is_first;
2019 } else if (likely(cum_len_next >= 0)) { /* header ends */
2025 small = (mss <= MXGEFW_SEND_SMALL_SIZE);
2026 flags_next = MXGEFW_FLAGS_TSO_PLD |
2027 MXGEFW_FLAGS_FIRST |
2028 (small * MXGEFW_FLAGS_SMALL);
2031 #endif /* NETIF_F_TSO */
2032 req->addr_high = high_swapped;
2033 req->addr_low = htonl(low);
2034 req->pseudo_hdr_offset = pseudo_hdr_offset;
2035 req->pad = 0; /* complete solid 16-byte block; does this matter? */
2036 req->rdma_count = 1;
2037 req->length = htons(seglen);
2038 req->cksum_offset = cksum_offset;
2039 req->flags = flags | ((cum_len & 1) * odd_flag);
2043 cum_len = cum_len_next;
2048 if (unlikely(cksum_offset > seglen))
2049 cksum_offset -= seglen;
2053 if (frag_idx == frag_cnt)
2056 /* map next fragment for DMA */
2057 idx = (count + tx->req) & tx->mask;
2058 frag = &skb_shinfo(skb)->frags[frag_idx];
2061 bus = pci_map_page(mgp->pdev, frag->page, frag->page_offset,
2062 len, PCI_DMA_TODEVICE);
2063 pci_unmap_addr_set(&tx->info[idx], bus, bus);
2064 pci_unmap_len_set(&tx->info[idx], len, len);
2067 (req - rdma_count)->rdma_count = rdma_count;
2072 req->flags |= MXGEFW_FLAGS_TSO_LAST;
2073 } while (!(req->flags & (MXGEFW_FLAGS_TSO_CHOP |
2074 MXGEFW_FLAGS_FIRST)));
2076 idx = ((count - 1) + tx->req) & tx->mask;
2077 tx->info[idx].last = 1;
2078 if (tx->wc_fifo == NULL)
2079 myri10ge_submit_req(tx, tx->req_list, count);
2081 myri10ge_submit_req_wc(tx, tx->req_list, count);
2083 if ((avail - count) < MXGEFW_MAX_SEND_DESC) {
2085 netif_stop_queue(dev);
2087 dev->trans_start = jiffies;
2091 /* Free any DMA resources we've alloced and clear out the skb
2092 * slot so as to not trip up assertions, and to avoid a
2093 * double-free if linearizing fails */
2095 last_idx = (idx + 1) & tx->mask;
2096 idx = tx->req & tx->mask;
2097 tx->info[idx].skb = NULL;
2099 len = pci_unmap_len(&tx->info[idx], len);
2101 if (tx->info[idx].skb != NULL)
2102 pci_unmap_single(mgp->pdev,
2103 pci_unmap_addr(&tx->info[idx],
2107 pci_unmap_page(mgp->pdev,
2108 pci_unmap_addr(&tx->info[idx],
2111 pci_unmap_len_set(&tx->info[idx], len, 0);
2112 tx->info[idx].skb = NULL;
2114 idx = (idx + 1) & tx->mask;
2115 } while (idx != last_idx);
2116 if (skb_shinfo(skb)->tso_size) {
2118 "myri10ge: %s: TSO but wanted to linearize?!?!?\n",
2123 if (skb_linearize(skb, GFP_ATOMIC))
2126 mgp->tx_linearized++;
2130 dev_kfree_skb_any(skb);
2131 mgp->stats.tx_dropped += 1;
2136 static struct net_device_stats *myri10ge_get_stats(struct net_device *dev)
2138 struct myri10ge_priv *mgp = netdev_priv(dev);
2142 static void myri10ge_set_multicast_list(struct net_device *dev)
2144 /* can be called from atomic contexts,
2145 * pass 1 to force atomicity in myri10ge_send_cmd() */
2146 myri10ge_change_promisc(netdev_priv(dev), dev->flags & IFF_PROMISC, 1);
2149 static int myri10ge_set_mac_address(struct net_device *dev, void *addr)
2151 struct sockaddr *sa = addr;
2152 struct myri10ge_priv *mgp = netdev_priv(dev);
2155 if (!is_valid_ether_addr(sa->sa_data))
2156 return -EADDRNOTAVAIL;
2158 status = myri10ge_update_mac_address(mgp, sa->sa_data);
2161 "myri10ge: %s: changing mac address failed with %d\n",
2166 /* change the dev structure */
2167 memcpy(dev->dev_addr, sa->sa_data, 6);
2171 static int myri10ge_change_mtu(struct net_device *dev, int new_mtu)
2173 struct myri10ge_priv *mgp = netdev_priv(dev);
2176 if ((new_mtu < 68) || (ETH_HLEN + new_mtu > MYRI10GE_MAX_ETHER_MTU)) {
2177 printk(KERN_ERR "myri10ge: %s: new mtu (%d) is not valid\n",
2178 dev->name, new_mtu);
2181 printk(KERN_INFO "%s: changing mtu from %d to %d\n",
2182 dev->name, dev->mtu, new_mtu);
2184 /* if we change the mtu on an active device, we must
2185 * reset the device so the firmware sees the change */
2186 myri10ge_close(dev);
2196 * Enable ECRC to align PCI-E Completion packets on an 8-byte boundary.
2197 * Only do it if the bridge is a root port since we don't want to disturb
2198 * any other device, except if forced with myri10ge_ecrc_enable > 1.
2201 #define PCI_DEVICE_ID_NVIDIA_NFORCE_CK804_PCIE 0x005d
2203 static void myri10ge_enable_ecrc(struct myri10ge_priv *mgp)
2205 struct pci_dev *bridge = mgp->pdev->bus->self;
2206 struct device *dev = &mgp->pdev->dev;
2213 if (!myri10ge_ecrc_enable || !bridge)
2216 /* check that the bridge is a root port */
2217 cap = pci_find_capability(bridge, PCI_CAP_ID_EXP);
2218 pci_read_config_word(bridge, cap + PCI_CAP_FLAGS, &val);
2219 ext_type = (val & PCI_EXP_FLAGS_TYPE) >> 4;
2220 if (ext_type != PCI_EXP_TYPE_ROOT_PORT) {
2221 if (myri10ge_ecrc_enable > 1) {
2222 struct pci_dev *old_bridge = bridge;
2224 /* Walk the hierarchy up to the root port
2225 * where ECRC has to be enabled */
2227 bridge = bridge->bus->self;
2230 "Failed to find root port"
2231 " to force ECRC\n");
2235 pci_find_capability(bridge, PCI_CAP_ID_EXP);
2236 pci_read_config_word(bridge,
2237 cap + PCI_CAP_FLAGS, &val);
2238 ext_type = (val & PCI_EXP_FLAGS_TYPE) >> 4;
2239 } while (ext_type != PCI_EXP_TYPE_ROOT_PORT);
2242 "Forcing ECRC on non-root port %s"
2243 " (enabling on root port %s)\n",
2244 pci_name(old_bridge), pci_name(bridge));
2247 "Not enabling ECRC on non-root port %s\n",
2253 cap = pci_find_ext_capability(bridge, PCI_EXT_CAP_ID_ERR);
2254 /* nvidia ext cap is not always linked in ext cap chain */
2256 && bridge->vendor == PCI_VENDOR_ID_NVIDIA
2257 && bridge->device == PCI_DEVICE_ID_NVIDIA_NFORCE_CK804_PCIE)
2263 ret = pci_read_config_dword(bridge, cap + PCI_ERR_CAP, &err_cap);
2265 dev_err(dev, "failed reading ext-conf-space of %s\n",
2267 dev_err(dev, "\t pci=nommconf in use? "
2268 "or buggy/incomplete/absent ACPI MCFG attr?\n");
2271 if (!(err_cap & PCI_ERR_CAP_ECRC_GENC))
2274 err_cap |= PCI_ERR_CAP_ECRC_GENE;
2275 pci_write_config_dword(bridge, cap + PCI_ERR_CAP, err_cap);
2276 dev_info(dev, "Enabled ECRC on upstream bridge %s\n", pci_name(bridge));
2277 mgp->tx.boundary = 4096;
2278 mgp->fw_name = myri10ge_fw_aligned;
2282 * The Lanai Z8E PCI-E interface achieves higher Read-DMA throughput
2283 * when the PCI-E Completion packets are aligned on an 8-byte
2284 * boundary. Some PCI-E chip sets always align Completion packets; on
2285 * the ones that do not, the alignment can be enforced by enabling
2286 * ECRC generation (if supported).
2288 * When PCI-E Completion packets are not aligned, it is actually more
2289 * efficient to limit Read-DMA transactions to 2KB, rather than 4KB.
2291 * If the driver can neither enable ECRC nor verify that it has
2292 * already been enabled, then it must use a firmware image which works
2293 * around unaligned completion packets (myri10ge_ethp_z8e.dat), and it
2294 * should also ensure that it never gives the device a Read-DMA which is
2295 * larger than 2KB by setting the tx.boundary to 2KB. If ECRC is
2296 * enabled, then the driver should use the aligned (myri10ge_eth_z8e.dat)
2297 * firmware image, and set tx.boundary to 4KB.
2300 #define PCI_DEVICE_ID_SERVERWORKS_HT2000_PCIE 0x0132
2302 static void myri10ge_select_firmware(struct myri10ge_priv *mgp)
2304 struct pci_dev *bridge = mgp->pdev->bus->self;
2306 mgp->tx.boundary = 2048;
2307 mgp->fw_name = myri10ge_fw_unaligned;
2309 if (myri10ge_force_firmware == 0) {
2310 myri10ge_enable_ecrc(mgp);
2312 /* Check to see if the upstream bridge is known to
2313 * provide aligned completions */
2315 /* ServerWorks HT2000/HT1000 */
2316 && bridge->vendor == PCI_VENDOR_ID_SERVERWORKS
2317 && bridge->device ==
2318 PCI_DEVICE_ID_SERVERWORKS_HT2000_PCIE) {
2319 dev_info(&mgp->pdev->dev,
2320 "Assuming aligned completions (0x%x:0x%x)\n",
2321 bridge->vendor, bridge->device);
2322 mgp->tx.boundary = 4096;
2323 mgp->fw_name = myri10ge_fw_aligned;
2326 if (myri10ge_force_firmware == 1) {
2327 dev_info(&mgp->pdev->dev,
2328 "Assuming aligned completions (forced)\n");
2329 mgp->tx.boundary = 4096;
2330 mgp->fw_name = myri10ge_fw_aligned;
2332 dev_info(&mgp->pdev->dev,
2333 "Assuming unaligned completions (forced)\n");
2334 mgp->tx.boundary = 2048;
2335 mgp->fw_name = myri10ge_fw_unaligned;
2338 if (myri10ge_fw_name != NULL) {
2339 dev_info(&mgp->pdev->dev, "overriding firmware to %s\n",
2341 mgp->fw_name = myri10ge_fw_name;
2345 static void myri10ge_save_state(struct myri10ge_priv *mgp)
2347 struct pci_dev *pdev = mgp->pdev;
2350 pci_save_state(pdev);
2351 /* now save PCIe and MSI state that Linux will not
2353 cap = pci_find_capability(pdev, PCI_CAP_ID_EXP);
2354 pci_read_config_dword(pdev, cap + PCI_EXP_DEVCTL, &mgp->devctl);
2355 cap = pci_find_capability(pdev, PCI_CAP_ID_MSI);
2356 pci_read_config_word(pdev, cap + PCI_MSI_FLAGS, &mgp->msi_flags);
2359 static void myri10ge_restore_state(struct myri10ge_priv *mgp)
2361 struct pci_dev *pdev = mgp->pdev;
2364 /* restore PCIe and MSI state that linux will not */
2365 cap = pci_find_capability(pdev, PCI_CAP_ID_EXP);
2366 pci_write_config_dword(pdev, cap + PCI_CAP_ID_EXP, mgp->devctl);
2367 cap = pci_find_capability(pdev, PCI_CAP_ID_MSI);
2368 pci_write_config_word(pdev, cap + PCI_MSI_FLAGS, mgp->msi_flags);
2370 pci_restore_state(pdev);
2375 static int myri10ge_suspend(struct pci_dev *pdev, pm_message_t state)
2377 struct myri10ge_priv *mgp;
2378 struct net_device *netdev;
2380 mgp = pci_get_drvdata(pdev);
2385 netif_device_detach(netdev);
2386 if (netif_running(netdev)) {
2387 printk(KERN_INFO "myri10ge: closing %s\n", netdev->name);
2389 myri10ge_close(netdev);
2392 myri10ge_dummy_rdma(mgp, 0);
2393 free_irq(pdev->irq, mgp);
2394 myri10ge_save_state(mgp);
2395 pci_disable_device(pdev);
2396 pci_set_power_state(pdev, pci_choose_state(pdev, state));
2400 static int myri10ge_resume(struct pci_dev *pdev)
2402 struct myri10ge_priv *mgp;
2403 struct net_device *netdev;
2407 mgp = pci_get_drvdata(pdev);
2411 pci_set_power_state(pdev, 0); /* zeros conf space as a side effect */
2412 msleep(5); /* give card time to respond */
2413 pci_read_config_word(mgp->pdev, PCI_VENDOR_ID, &vendor);
2414 if (vendor == 0xffff) {
2415 printk(KERN_ERR "myri10ge: %s: device disappeared!\n",
2419 myri10ge_restore_state(mgp);
2420 pci_enable_device(pdev);
2421 pci_set_master(pdev);
2423 status = request_irq(pdev->irq, myri10ge_intr, SA_SHIRQ,
2426 dev_err(&pdev->dev, "failed to allocate IRQ\n");
2427 goto abort_with_msi;
2430 myri10ge_reset(mgp);
2431 myri10ge_dummy_rdma(mgp, mgp->tx.boundary != 4096);
2433 /* Save configuration space to be restored if the
2434 * nic resets due to a parity error */
2435 myri10ge_save_state(mgp);
2437 if (netif_running(netdev)) {
2439 myri10ge_open(netdev);
2442 netif_device_attach(netdev);
2451 #endif /* CONFIG_PM */
2453 static u32 myri10ge_read_reboot(struct myri10ge_priv *mgp)
2455 struct pci_dev *pdev = mgp->pdev;
2456 int vs = mgp->vendor_specific_offset;
2459 /*enter read32 mode */
2460 pci_write_config_byte(pdev, vs + 0x10, 0x3);
2462 /*read REBOOT_STATUS (0xfffffff0) */
2463 pci_write_config_dword(pdev, vs + 0x18, 0xfffffff0);
2464 pci_read_config_dword(pdev, vs + 0x14, &reboot);
2469 * This watchdog is used to check whether the board has suffered
2470 * from a parity error and needs to be recovered.
2472 static void myri10ge_watchdog(void *arg)
2474 struct myri10ge_priv *mgp = arg;
2479 mgp->watchdog_resets++;
2480 pci_read_config_word(mgp->pdev, PCI_COMMAND, &cmd);
2481 if ((cmd & PCI_COMMAND_MASTER) == 0) {
2482 /* Bus master DMA disabled? Check to see
2483 * if the card rebooted due to a parity error
2484 * For now, just report it */
2485 reboot = myri10ge_read_reboot(mgp);
2487 "myri10ge: %s: NIC rebooted (0x%x), resetting\n",
2488 mgp->dev->name, reboot);
2490 * A rebooted nic will come back with config space as
2491 * it was after power was applied to PCIe bus.
2492 * Attempt to restore config space which was saved
2493 * when the driver was loaded, or the last time the
2494 * nic was resumed from power saving mode.
2496 myri10ge_restore_state(mgp);
2498 /* if we get back -1's from our slot, perhaps somebody
2499 * powered off our card. Don't try to reset it in
2501 if (cmd == 0xffff) {
2502 pci_read_config_word(mgp->pdev, PCI_VENDOR_ID, &vendor);
2503 if (vendor == 0xffff) {
2505 "myri10ge: %s: device disappeared!\n",
2510 /* Perhaps it is a software error. Try to reset */
2512 printk(KERN_ERR "myri10ge: %s: device timeout, resetting\n",
2514 printk(KERN_INFO "myri10ge: %s: %d %d %d %d %d\n",
2515 mgp->dev->name, mgp->tx.req, mgp->tx.done,
2516 mgp->tx.pkt_start, mgp->tx.pkt_done,
2517 (int)ntohl(mgp->fw_stats->send_done_count));
2519 printk(KERN_INFO "myri10ge: %s: %d %d %d %d %d\n",
2520 mgp->dev->name, mgp->tx.req, mgp->tx.done,
2521 mgp->tx.pkt_start, mgp->tx.pkt_done,
2522 (int)ntohl(mgp->fw_stats->send_done_count));
2525 myri10ge_close(mgp->dev);
2526 status = myri10ge_load_firmware(mgp);
2528 printk(KERN_ERR "myri10ge: %s: failed to load firmware\n",
2531 myri10ge_open(mgp->dev);
2536 * We use our own timer routine rather than relying upon
2537 * netdev->tx_timeout because we have a very large hardware transmit
2538 * queue. Due to the large queue, the netdev->tx_timeout function
2539 * cannot detect a NIC with a parity error in a timely fashion if the
2540 * NIC is lightly loaded.
2542 static void myri10ge_watchdog_timer(unsigned long arg)
2544 struct myri10ge_priv *mgp;
2546 mgp = (struct myri10ge_priv *)arg;
2547 if (mgp->tx.req != mgp->tx.done &&
2548 mgp->tx.done == mgp->watchdog_tx_done)
2549 /* nic seems like it might be stuck.. */
2550 schedule_work(&mgp->watchdog_work);
2553 mod_timer(&mgp->watchdog_timer,
2554 jiffies + myri10ge_watchdog_timeout * HZ);
2556 mgp->watchdog_tx_done = mgp->tx.done;
2559 static int myri10ge_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2561 struct net_device *netdev;
2562 struct myri10ge_priv *mgp;
2563 struct device *dev = &pdev->dev;
2566 int status = -ENXIO;
2571 netdev = alloc_etherdev(sizeof(*mgp));
2572 if (netdev == NULL) {
2573 dev_err(dev, "Could not allocate ethernet device\n");
2577 mgp = netdev_priv(netdev);
2578 memset(mgp, 0, sizeof(*mgp));
2581 mgp->csum_flag = MXGEFW_FLAGS_CKSUM;
2582 mgp->pause = myri10ge_flow_control;
2583 mgp->intr_coal_delay = myri10ge_intr_coal_delay;
2584 init_waitqueue_head(&mgp->down_wq);
2586 if (pci_enable_device(pdev)) {
2587 dev_err(&pdev->dev, "pci_enable_device call failed\n");
2589 goto abort_with_netdev;
2591 myri10ge_select_firmware(mgp);
2593 /* Find the vendor-specific cap so we can check
2594 * the reboot register later on */
2595 mgp->vendor_specific_offset
2596 = pci_find_capability(pdev, PCI_CAP_ID_VNDR);
2598 /* Set our max read request to 4KB */
2599 cap = pci_find_capability(pdev, PCI_CAP_ID_EXP);
2601 dev_err(&pdev->dev, "Bad PCI_CAP_ID_EXP location %d\n", cap);
2602 goto abort_with_netdev;
2604 status = pci_read_config_word(pdev, cap + PCI_EXP_DEVCTL, &val);
2606 dev_err(&pdev->dev, "Error %d reading PCI_EXP_DEVCTL\n",
2608 goto abort_with_netdev;
2610 val = (val & ~PCI_EXP_DEVCTL_READRQ) | (5 << 12);
2611 status = pci_write_config_word(pdev, cap + PCI_EXP_DEVCTL, val);
2613 dev_err(&pdev->dev, "Error %d writing PCI_EXP_DEVCTL\n",
2615 goto abort_with_netdev;
2618 pci_set_master(pdev);
2620 status = pci_set_dma_mask(pdev, DMA_64BIT_MASK);
2624 "64-bit pci address mask was refused, trying 32-bit");
2625 status = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
2628 dev_err(&pdev->dev, "Error %d setting DMA mask\n", status);
2629 goto abort_with_netdev;
2631 mgp->cmd = dma_alloc_coherent(&pdev->dev, sizeof(*mgp->cmd),
2632 &mgp->cmd_bus, GFP_KERNEL);
2633 if (mgp->cmd == NULL)
2634 goto abort_with_netdev;
2636 mgp->fw_stats = dma_alloc_coherent(&pdev->dev, sizeof(*mgp->fw_stats),
2637 &mgp->fw_stats_bus, GFP_KERNEL);
2638 if (mgp->fw_stats == NULL)
2639 goto abort_with_cmd;
2641 mgp->board_span = pci_resource_len(pdev, 0);
2642 mgp->iomem_base = pci_resource_start(pdev, 0);
2645 mgp->mtrr = mtrr_add(mgp->iomem_base, mgp->board_span,
2646 MTRR_TYPE_WRCOMB, 1);
2648 /* Hack. need to get rid of these magic numbers */
2650 2 * 1024 * 1024 - (2 * (48 * 1024) + (32 * 1024)) - 0x100;
2651 if (mgp->sram_size > mgp->board_span) {
2652 dev_err(&pdev->dev, "board span %ld bytes too small\n",
2656 mgp->sram = ioremap(mgp->iomem_base, mgp->board_span);
2657 if (mgp->sram == NULL) {
2658 dev_err(&pdev->dev, "ioremap failed for %ld bytes at 0x%lx\n",
2659 mgp->board_span, mgp->iomem_base);
2663 memcpy_fromio(mgp->eeprom_strings,
2664 mgp->sram + mgp->sram_size - MYRI10GE_EEPROM_STRINGS_SIZE,
2665 MYRI10GE_EEPROM_STRINGS_SIZE);
2666 memset(mgp->eeprom_strings + MYRI10GE_EEPROM_STRINGS_SIZE - 2, 0, 2);
2667 status = myri10ge_read_mac_addr(mgp);
2669 goto abort_with_ioremap;
2671 for (i = 0; i < ETH_ALEN; i++)
2672 netdev->dev_addr[i] = mgp->mac_addr[i];
2674 /* allocate rx done ring */
2675 bytes = myri10ge_max_intr_slots * sizeof(*mgp->rx_done.entry);
2676 mgp->rx_done.entry = dma_alloc_coherent(&pdev->dev, bytes,
2677 &mgp->rx_done.bus, GFP_KERNEL);
2678 if (mgp->rx_done.entry == NULL)
2679 goto abort_with_ioremap;
2680 memset(mgp->rx_done.entry, 0, bytes);
2682 status = myri10ge_load_firmware(mgp);
2684 dev_err(&pdev->dev, "failed to load firmware\n");
2685 goto abort_with_rx_done;
2688 status = myri10ge_reset(mgp);
2690 dev_err(&pdev->dev, "failed reset\n");
2691 goto abort_with_firmware;
2695 status = pci_enable_msi(pdev);
2698 "Error %d setting up MSI; falling back to xPIC\n",
2701 mgp->msi_enabled = 1;
2704 status = request_irq(pdev->irq, myri10ge_intr, SA_SHIRQ,
2707 dev_err(&pdev->dev, "failed to allocate IRQ\n");
2708 goto abort_with_firmware;
2711 pci_set_drvdata(pdev, mgp);
2712 if ((myri10ge_initial_mtu + ETH_HLEN) > MYRI10GE_MAX_ETHER_MTU)
2713 myri10ge_initial_mtu = MYRI10GE_MAX_ETHER_MTU - ETH_HLEN;
2714 if ((myri10ge_initial_mtu + ETH_HLEN) < 68)
2715 myri10ge_initial_mtu = 68;
2716 netdev->mtu = myri10ge_initial_mtu;
2717 netdev->open = myri10ge_open;
2718 netdev->stop = myri10ge_close;
2719 netdev->hard_start_xmit = myri10ge_xmit;
2720 netdev->get_stats = myri10ge_get_stats;
2721 netdev->base_addr = mgp->iomem_base;
2722 netdev->irq = pdev->irq;
2723 netdev->change_mtu = myri10ge_change_mtu;
2724 netdev->set_multicast_list = myri10ge_set_multicast_list;
2725 netdev->set_mac_address = myri10ge_set_mac_address;
2726 netdev->features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_TSO;
2728 netdev->features |= NETIF_F_HIGHDMA;
2729 netdev->poll = myri10ge_poll;
2730 netdev->weight = myri10ge_napi_weight;
2732 /* Save configuration space to be restored if the
2733 * nic resets due to a parity error */
2734 myri10ge_save_state(mgp);
2735 /* Restore state immediately since pci_save_msi_state disables MSI */
2736 myri10ge_restore_state(mgp);
2738 /* Setup the watchdog timer */
2739 setup_timer(&mgp->watchdog_timer, myri10ge_watchdog_timer,
2740 (unsigned long)mgp);
2742 SET_ETHTOOL_OPS(netdev, &myri10ge_ethtool_ops);
2743 INIT_WORK(&mgp->watchdog_work, myri10ge_watchdog, mgp);
2744 status = register_netdev(netdev);
2746 dev_err(&pdev->dev, "register_netdev failed: %d\n", status);
2747 goto abort_with_irq;
2750 printk(KERN_INFO "myri10ge: %s: %s IRQ %d, tx bndry %d, fw %s, WC %s\n",
2751 netdev->name, (mgp->msi_enabled ? "MSI" : "xPIC"),
2752 pdev->irq, mgp->tx.boundary, mgp->fw_name,
2753 (mgp->mtrr >= 0 ? "Enabled" : "Disabled"));
2758 free_irq(pdev->irq, mgp);
2759 if (mgp->msi_enabled)
2760 pci_disable_msi(pdev);
2762 abort_with_firmware:
2763 myri10ge_dummy_rdma(mgp, 0);
2766 bytes = myri10ge_max_intr_slots * sizeof(*mgp->rx_done.entry);
2767 dma_free_coherent(&pdev->dev, bytes,
2768 mgp->rx_done.entry, mgp->rx_done.bus);
2776 mtrr_del(mgp->mtrr, mgp->iomem_base, mgp->board_span);
2778 dma_free_coherent(&pdev->dev, sizeof(*mgp->fw_stats),
2779 mgp->fw_stats, mgp->fw_stats_bus);
2782 dma_free_coherent(&pdev->dev, sizeof(*mgp->cmd),
2783 mgp->cmd, mgp->cmd_bus);
2787 free_netdev(netdev);
2794 * Does what is necessary to shutdown one Myrinet device. Called
2795 * once for each Myrinet card by the kernel when a module is
2798 static void myri10ge_remove(struct pci_dev *pdev)
2800 struct myri10ge_priv *mgp;
2801 struct net_device *netdev;
2804 mgp = pci_get_drvdata(pdev);
2808 flush_scheduled_work();
2810 unregister_netdev(netdev);
2811 free_irq(pdev->irq, mgp);
2812 if (mgp->msi_enabled)
2813 pci_disable_msi(pdev);
2815 myri10ge_dummy_rdma(mgp, 0);
2817 bytes = myri10ge_max_intr_slots * sizeof(*mgp->rx_done.entry);
2818 dma_free_coherent(&pdev->dev, bytes,
2819 mgp->rx_done.entry, mgp->rx_done.bus);
2825 mtrr_del(mgp->mtrr, mgp->iomem_base, mgp->board_span);
2827 dma_free_coherent(&pdev->dev, sizeof(*mgp->fw_stats),
2828 mgp->fw_stats, mgp->fw_stats_bus);
2830 dma_free_coherent(&pdev->dev, sizeof(*mgp->cmd),
2831 mgp->cmd, mgp->cmd_bus);
2833 free_netdev(netdev);
2834 pci_set_drvdata(pdev, NULL);
2837 #define PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E 0x0008
2839 static struct pci_device_id myri10ge_pci_tbl[] = {
2840 {PCI_DEVICE(PCI_VENDOR_ID_MYRICOM, PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E)},
2844 static struct pci_driver myri10ge_driver = {
2846 .probe = myri10ge_probe,
2847 .remove = myri10ge_remove,
2848 .id_table = myri10ge_pci_tbl,
2850 .suspend = myri10ge_suspend,
2851 .resume = myri10ge_resume,
2855 static __init int myri10ge_init_module(void)
2857 printk(KERN_INFO "%s: Version %s\n", myri10ge_driver.name,
2858 MYRI10GE_VERSION_STR);
2859 return pci_register_driver(&myri10ge_driver);
2862 module_init(myri10ge_init_module);
2864 static __exit void myri10ge_cleanup_module(void)
2866 pci_unregister_driver(&myri10ge_driver);
2869 module_exit(myri10ge_cleanup_module);