1 /*************************************************************************
2 * myri10ge.c: Myricom Myri-10G Ethernet driver.
4 * Copyright (C) 2005 - 2007 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 COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
20 * AND 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 COPYRIGHT OWNER OR CONTRIBUTORS BE
23 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
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 <linux/log2.h>
64 #include <net/checksum.h>
65 #include <asm/byteorder.h>
67 #include <asm/processor.h>
72 #include "myri10ge_mcp.h"
73 #include "myri10ge_mcp_gen_header.h"
75 #define MYRI10GE_VERSION_STR "1.3.1-1.248"
77 MODULE_DESCRIPTION("Myricom 10G driver (10GbE)");
78 MODULE_AUTHOR("Maintainer: help@myri.com");
79 MODULE_VERSION(MYRI10GE_VERSION_STR);
80 MODULE_LICENSE("Dual BSD/GPL");
82 #define MYRI10GE_MAX_ETHER_MTU 9014
84 #define MYRI10GE_ETH_STOPPED 0
85 #define MYRI10GE_ETH_STOPPING 1
86 #define MYRI10GE_ETH_STARTING 2
87 #define MYRI10GE_ETH_RUNNING 3
88 #define MYRI10GE_ETH_OPEN_FAILED 4
90 #define MYRI10GE_EEPROM_STRINGS_SIZE 256
91 #define MYRI10GE_MAX_SEND_DESC_TSO ((65536 / 2048) * 2)
93 #define MYRI10GE_NO_CONFIRM_DATA htonl(0xffffffff)
94 #define MYRI10GE_NO_RESPONSE_RESULT 0xffffffff
96 #define MYRI10GE_ALLOC_ORDER 0
97 #define MYRI10GE_ALLOC_SIZE ((1 << MYRI10GE_ALLOC_ORDER) * PAGE_SIZE)
98 #define MYRI10GE_MAX_FRAGS_PER_FRAME (MYRI10GE_MAX_ETHER_MTU/MYRI10GE_ALLOC_SIZE + 1)
100 struct myri10ge_rx_buffer_state {
103 DECLARE_PCI_UNMAP_ADDR(bus)
104 DECLARE_PCI_UNMAP_LEN(len)
107 struct myri10ge_tx_buffer_state {
110 DECLARE_PCI_UNMAP_ADDR(bus)
111 DECLARE_PCI_UNMAP_LEN(len)
114 struct myri10ge_cmd {
120 struct myri10ge_rx_buf {
121 struct mcp_kreq_ether_recv __iomem *lanai; /* lanai ptr for recv ring */
122 u8 __iomem *wc_fifo; /* w/c rx dma addr fifo address */
123 struct mcp_kreq_ether_recv *shadow; /* host shadow of recv ring */
124 struct myri10ge_rx_buffer_state *info;
131 int mask; /* number of rx slots -1 */
135 struct myri10ge_tx_buf {
136 struct mcp_kreq_ether_send __iomem *lanai; /* lanai ptr for sendq */
137 u8 __iomem *wc_fifo; /* w/c send fifo address */
138 struct mcp_kreq_ether_send *req_list; /* host shadow of sendq */
140 struct myri10ge_tx_buffer_state *info;
141 int mask; /* number of transmit slots -1 */
142 int boundary; /* boundary transmits cannot cross */
143 int req ____cacheline_aligned; /* transmit slots submitted */
144 int pkt_start; /* packets started */
145 int done ____cacheline_aligned; /* transmit slots completed */
146 int pkt_done; /* packets completed */
149 struct myri10ge_rx_done {
150 struct mcp_slot *entry;
156 struct myri10ge_priv {
157 int running; /* running? */
158 int csum_flag; /* rx_csums? */
159 struct myri10ge_tx_buf tx; /* transmit ring */
160 struct myri10ge_rx_buf rx_small;
161 struct myri10ge_rx_buf rx_big;
162 struct myri10ge_rx_done rx_done;
165 struct net_device *dev;
166 struct net_device_stats stats;
169 unsigned long board_span;
170 unsigned long iomem_base;
171 __be32 __iomem *irq_claim;
172 __be32 __iomem *irq_deassert;
173 char *mac_addr_string;
174 struct mcp_cmd_response *cmd;
176 struct mcp_irq_data *fw_stats;
177 dma_addr_t fw_stats_bus;
178 struct pci_dev *pdev;
181 unsigned int rdma_tags_available;
183 __be32 __iomem *intr_coal_delay_ptr;
189 wait_queue_head_t down_wq;
190 struct work_struct watchdog_work;
191 struct timer_list watchdog_timer;
192 int watchdog_tx_done;
198 char eeprom_strings[MYRI10GE_EEPROM_STRINGS_SIZE];
199 char fw_version[128];
203 int adopted_rx_filter_bug;
204 u8 mac_addr[6]; /* eeprom mac address */
205 unsigned long serial_number;
206 int vendor_specific_offset;
207 int fw_multicast_support;
215 static char *myri10ge_fw_unaligned = "myri10ge_ethp_z8e.dat";
216 static char *myri10ge_fw_aligned = "myri10ge_eth_z8e.dat";
218 static char *myri10ge_fw_name = NULL;
219 module_param(myri10ge_fw_name, charp, S_IRUGO | S_IWUSR);
220 MODULE_PARM_DESC(myri10ge_fw_name, "Firmware image name\n");
222 static int myri10ge_ecrc_enable = 1;
223 module_param(myri10ge_ecrc_enable, int, S_IRUGO);
224 MODULE_PARM_DESC(myri10ge_ecrc_enable, "Enable Extended CRC on PCI-E\n");
226 static int myri10ge_max_intr_slots = 1024;
227 module_param(myri10ge_max_intr_slots, int, S_IRUGO);
228 MODULE_PARM_DESC(myri10ge_max_intr_slots, "Interrupt queue slots\n");
230 static int myri10ge_small_bytes = -1; /* -1 == auto */
231 module_param(myri10ge_small_bytes, int, S_IRUGO | S_IWUSR);
232 MODULE_PARM_DESC(myri10ge_small_bytes, "Threshold of small packets\n");
234 static int myri10ge_msi = 1; /* enable msi by default */
235 module_param(myri10ge_msi, int, S_IRUGO | S_IWUSR);
236 MODULE_PARM_DESC(myri10ge_msi, "Enable Message Signalled Interrupts\n");
238 static int myri10ge_intr_coal_delay = 75;
239 module_param(myri10ge_intr_coal_delay, int, S_IRUGO);
240 MODULE_PARM_DESC(myri10ge_intr_coal_delay, "Interrupt coalescing delay\n");
242 static int myri10ge_flow_control = 1;
243 module_param(myri10ge_flow_control, int, S_IRUGO);
244 MODULE_PARM_DESC(myri10ge_flow_control, "Pause parameter\n");
246 static int myri10ge_deassert_wait = 1;
247 module_param(myri10ge_deassert_wait, int, S_IRUGO | S_IWUSR);
248 MODULE_PARM_DESC(myri10ge_deassert_wait,
249 "Wait when deasserting legacy interrupts\n");
251 static int myri10ge_force_firmware = 0;
252 module_param(myri10ge_force_firmware, int, S_IRUGO);
253 MODULE_PARM_DESC(myri10ge_force_firmware,
254 "Force firmware to assume aligned completions\n");
256 static int myri10ge_initial_mtu = MYRI10GE_MAX_ETHER_MTU - ETH_HLEN;
257 module_param(myri10ge_initial_mtu, int, S_IRUGO);
258 MODULE_PARM_DESC(myri10ge_initial_mtu, "Initial MTU\n");
260 static int myri10ge_napi_weight = 64;
261 module_param(myri10ge_napi_weight, int, S_IRUGO);
262 MODULE_PARM_DESC(myri10ge_napi_weight, "Set NAPI weight\n");
264 static int myri10ge_watchdog_timeout = 1;
265 module_param(myri10ge_watchdog_timeout, int, S_IRUGO);
266 MODULE_PARM_DESC(myri10ge_watchdog_timeout, "Set watchdog timeout\n");
268 static int myri10ge_max_irq_loops = 1048576;
269 module_param(myri10ge_max_irq_loops, int, S_IRUGO);
270 MODULE_PARM_DESC(myri10ge_max_irq_loops,
271 "Set stuck legacy IRQ detection threshold\n");
273 #define MYRI10GE_MSG_DEFAULT NETIF_MSG_LINK
275 static int myri10ge_debug = -1; /* defaults above */
276 module_param(myri10ge_debug, int, 0);
277 MODULE_PARM_DESC(myri10ge_debug, "Debug level (0=none,...,16=all)");
279 static int myri10ge_fill_thresh = 256;
280 module_param(myri10ge_fill_thresh, int, S_IRUGO | S_IWUSR);
281 MODULE_PARM_DESC(myri10ge_fill_thresh, "Number of empty rx slots allowed\n");
283 static int myri10ge_reset_recover = 1;
285 static int myri10ge_wcfifo = 0;
286 module_param(myri10ge_wcfifo, int, S_IRUGO);
287 MODULE_PARM_DESC(myri10ge_wcfifo, "Enable WC Fifo when WC is enabled\n");
289 #define MYRI10GE_FW_OFFSET 1024*1024
290 #define MYRI10GE_HIGHPART_TO_U32(X) \
291 (sizeof (X) == 8) ? ((u32)((u64)(X) >> 32)) : (0)
292 #define MYRI10GE_LOWPART_TO_U32(X) ((u32)(X))
294 #define myri10ge_pio_copy(to,from,size) __iowrite64_copy(to,from,size/8)
296 static void myri10ge_set_multicast_list(struct net_device *dev);
298 static inline void put_be32(__be32 val, __be32 __iomem * p)
300 __raw_writel((__force __u32) val, (__force void __iomem *)p);
304 myri10ge_send_cmd(struct myri10ge_priv *mgp, u32 cmd,
305 struct myri10ge_cmd *data, int atomic)
308 char buf_bytes[sizeof(*buf) + 8];
309 struct mcp_cmd_response *response = mgp->cmd;
310 char __iomem *cmd_addr = mgp->sram + MXGEFW_ETH_CMD;
311 u32 dma_low, dma_high, result, value;
314 /* ensure buf is aligned to 8 bytes */
315 buf = (struct mcp_cmd *)ALIGN((unsigned long)buf_bytes, 8);
317 buf->data0 = htonl(data->data0);
318 buf->data1 = htonl(data->data1);
319 buf->data2 = htonl(data->data2);
320 buf->cmd = htonl(cmd);
321 dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
322 dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
324 buf->response_addr.low = htonl(dma_low);
325 buf->response_addr.high = htonl(dma_high);
326 response->result = htonl(MYRI10GE_NO_RESPONSE_RESULT);
328 myri10ge_pio_copy(cmd_addr, buf, sizeof(*buf));
330 /* wait up to 15ms. Longest command is the DMA benchmark,
331 * which is capped at 5ms, but runs from a timeout handler
332 * that runs every 7.8ms. So a 15ms timeout leaves us with
336 /* if atomic is set, do not sleep,
337 * and try to get the completion quickly
338 * (1ms will be enough for those commands) */
339 for (sleep_total = 0;
341 && response->result == htonl(MYRI10GE_NO_RESPONSE_RESULT);
345 /* use msleep for most command */
346 for (sleep_total = 0;
348 && response->result == htonl(MYRI10GE_NO_RESPONSE_RESULT);
353 result = ntohl(response->result);
354 value = ntohl(response->data);
355 if (result != MYRI10GE_NO_RESPONSE_RESULT) {
359 } else if (result == MXGEFW_CMD_UNKNOWN) {
361 } else if (result == MXGEFW_CMD_ERROR_UNALIGNED) {
364 dev_err(&mgp->pdev->dev,
365 "command %d failed, result = %d\n",
371 dev_err(&mgp->pdev->dev, "command %d timed out, result = %d\n",
377 * The eeprom strings on the lanaiX have the format
380 * PT:ddd mmm xx xx:xx:xx xx\0
381 * PV:ddd mmm xx xx:xx:xx xx\0
383 static int myri10ge_read_mac_addr(struct myri10ge_priv *mgp)
388 ptr = mgp->eeprom_strings;
389 limit = mgp->eeprom_strings + MYRI10GE_EEPROM_STRINGS_SIZE;
391 while (*ptr != '\0' && ptr < limit) {
392 if (memcmp(ptr, "MAC=", 4) == 0) {
394 mgp->mac_addr_string = ptr;
395 for (i = 0; i < 6; i++) {
396 if ((ptr + 2) > limit)
399 simple_strtoul(ptr, &ptr, 16);
403 if (memcmp((const void *)ptr, "SN=", 3) == 0) {
405 mgp->serial_number = simple_strtoul(ptr, &ptr, 10);
407 while (ptr < limit && *ptr++) ;
413 dev_err(&mgp->pdev->dev, "failed to parse eeprom_strings\n");
418 * Enable or disable periodic RDMAs from the host to make certain
419 * chipsets resend dropped PCIe messages
422 static void myri10ge_dummy_rdma(struct myri10ge_priv *mgp, int enable)
424 char __iomem *submit;
426 u32 dma_low, dma_high;
429 /* clear confirmation addr */
433 /* send a rdma command to the PCIe engine, and wait for the
434 * response in the confirmation address. The firmware should
435 * write a -1 there to indicate it is alive and well
437 dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
438 dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
440 buf[0] = htonl(dma_high); /* confirm addr MSW */
441 buf[1] = htonl(dma_low); /* confirm addr LSW */
442 buf[2] = MYRI10GE_NO_CONFIRM_DATA; /* confirm data */
443 buf[3] = htonl(dma_high); /* dummy addr MSW */
444 buf[4] = htonl(dma_low); /* dummy addr LSW */
445 buf[5] = htonl(enable); /* enable? */
447 submit = mgp->sram + MXGEFW_BOOT_DUMMY_RDMA;
449 myri10ge_pio_copy(submit, &buf, sizeof(buf));
450 for (i = 0; mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA && i < 20; i++)
452 if (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA)
453 dev_err(&mgp->pdev->dev, "dummy rdma %s failed\n",
454 (enable ? "enable" : "disable"));
458 myri10ge_validate_firmware(struct myri10ge_priv *mgp,
459 struct mcp_gen_header *hdr)
461 struct device *dev = &mgp->pdev->dev;
463 /* check firmware type */
464 if (ntohl(hdr->mcp_type) != MCP_TYPE_ETH) {
465 dev_err(dev, "Bad firmware type: 0x%x\n", ntohl(hdr->mcp_type));
469 /* save firmware version for ethtool */
470 strncpy(mgp->fw_version, hdr->version, sizeof(mgp->fw_version));
472 sscanf(mgp->fw_version, "%d.%d.%d", &mgp->fw_ver_major,
473 &mgp->fw_ver_minor, &mgp->fw_ver_tiny);
475 if (!(mgp->fw_ver_major == MXGEFW_VERSION_MAJOR
476 && mgp->fw_ver_minor == MXGEFW_VERSION_MINOR)) {
477 dev_err(dev, "Found firmware version %s\n", mgp->fw_version);
478 dev_err(dev, "Driver needs %d.%d\n", MXGEFW_VERSION_MAJOR,
479 MXGEFW_VERSION_MINOR);
485 static int myri10ge_load_hotplug_firmware(struct myri10ge_priv *mgp, u32 * size)
487 unsigned crc, reread_crc;
488 const struct firmware *fw;
489 struct device *dev = &mgp->pdev->dev;
490 struct mcp_gen_header *hdr;
495 if ((status = request_firmware(&fw, mgp->fw_name, dev)) < 0) {
496 dev_err(dev, "Unable to load %s firmware image via hotplug\n",
499 goto abort_with_nothing;
504 if (fw->size >= mgp->sram_size - MYRI10GE_FW_OFFSET ||
505 fw->size < MCP_HEADER_PTR_OFFSET + 4) {
506 dev_err(dev, "Firmware size invalid:%d\n", (int)fw->size);
512 hdr_offset = ntohl(*(__be32 *) (fw->data + MCP_HEADER_PTR_OFFSET));
513 if ((hdr_offset & 3) || hdr_offset + sizeof(*hdr) > fw->size) {
514 dev_err(dev, "Bad firmware file\n");
518 hdr = (void *)(fw->data + hdr_offset);
520 status = myri10ge_validate_firmware(mgp, hdr);
524 crc = crc32(~0, fw->data, fw->size);
525 for (i = 0; i < fw->size; i += 256) {
526 myri10ge_pio_copy(mgp->sram + MYRI10GE_FW_OFFSET + i,
528 min(256U, (unsigned)(fw->size - i)));
532 /* corruption checking is good for parity recovery and buggy chipset */
533 memcpy_fromio(fw->data, mgp->sram + MYRI10GE_FW_OFFSET, fw->size);
534 reread_crc = crc32(~0, fw->data, fw->size);
535 if (crc != reread_crc) {
536 dev_err(dev, "CRC failed(fw-len=%u), got 0x%x (expect 0x%x)\n",
537 (unsigned)fw->size, reread_crc, crc);
541 *size = (u32) fw->size;
544 release_firmware(fw);
550 static int myri10ge_adopt_running_firmware(struct myri10ge_priv *mgp)
552 struct mcp_gen_header *hdr;
553 struct device *dev = &mgp->pdev->dev;
554 const size_t bytes = sizeof(struct mcp_gen_header);
558 /* find running firmware header */
559 hdr_offset = ntohl(__raw_readl(mgp->sram + MCP_HEADER_PTR_OFFSET));
561 if ((hdr_offset & 3) || hdr_offset + sizeof(*hdr) > mgp->sram_size) {
562 dev_err(dev, "Running firmware has bad header offset (%d)\n",
567 /* copy header of running firmware from SRAM to host memory to
568 * validate firmware */
569 hdr = kmalloc(bytes, GFP_KERNEL);
571 dev_err(dev, "could not malloc firmware hdr\n");
574 memcpy_fromio(hdr, mgp->sram + hdr_offset, bytes);
575 status = myri10ge_validate_firmware(mgp, hdr);
578 /* check to see if adopted firmware has bug where adopting
579 * it will cause broadcasts to be filtered unless the NIC
580 * is kept in ALLMULTI mode */
581 if (mgp->fw_ver_major == 1 && mgp->fw_ver_minor == 4 &&
582 mgp->fw_ver_tiny >= 4 && mgp->fw_ver_tiny <= 11) {
583 mgp->adopted_rx_filter_bug = 1;
584 dev_warn(dev, "Adopting fw %d.%d.%d: "
585 "working around rx filter bug\n",
586 mgp->fw_ver_major, mgp->fw_ver_minor,
592 static int myri10ge_load_firmware(struct myri10ge_priv *mgp)
594 char __iomem *submit;
596 u32 dma_low, dma_high, size;
600 status = myri10ge_load_hotplug_firmware(mgp, &size);
602 dev_warn(&mgp->pdev->dev, "hotplug firmware loading failed\n");
604 /* Do not attempt to adopt firmware if there
609 status = myri10ge_adopt_running_firmware(mgp);
611 dev_err(&mgp->pdev->dev,
612 "failed to adopt running firmware\n");
615 dev_info(&mgp->pdev->dev,
616 "Successfully adopted running firmware\n");
617 if (mgp->tx.boundary == 4096) {
618 dev_warn(&mgp->pdev->dev,
619 "Using firmware currently running on NIC"
621 dev_warn(&mgp->pdev->dev,
622 "performance consider loading optimized "
624 dev_warn(&mgp->pdev->dev, "via hotplug\n");
627 mgp->fw_name = "adopted";
628 mgp->tx.boundary = 2048;
632 /* clear confirmation addr */
636 /* send a reload command to the bootstrap MCP, and wait for the
637 * response in the confirmation address. The firmware should
638 * write a -1 there to indicate it is alive and well
640 dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
641 dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
643 buf[0] = htonl(dma_high); /* confirm addr MSW */
644 buf[1] = htonl(dma_low); /* confirm addr LSW */
645 buf[2] = MYRI10GE_NO_CONFIRM_DATA; /* confirm data */
647 /* FIX: All newest firmware should un-protect the bottom of
648 * the sram before handoff. However, the very first interfaces
649 * do not. Therefore the handoff copy must skip the first 8 bytes
651 buf[3] = htonl(MYRI10GE_FW_OFFSET + 8); /* where the code starts */
652 buf[4] = htonl(size - 8); /* length of code */
653 buf[5] = htonl(8); /* where to copy to */
654 buf[6] = htonl(0); /* where to jump to */
656 submit = mgp->sram + MXGEFW_BOOT_HANDOFF;
658 myri10ge_pio_copy(submit, &buf, sizeof(buf));
663 while (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA && i < 20) {
667 if (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA) {
668 dev_err(&mgp->pdev->dev, "handoff failed\n");
671 dev_info(&mgp->pdev->dev, "handoff confirmed\n");
672 myri10ge_dummy_rdma(mgp, 1);
677 static int myri10ge_update_mac_address(struct myri10ge_priv *mgp, u8 * addr)
679 struct myri10ge_cmd cmd;
682 cmd.data0 = ((addr[0] << 24) | (addr[1] << 16)
683 | (addr[2] << 8) | addr[3]);
685 cmd.data1 = ((addr[4] << 8) | (addr[5]));
687 status = myri10ge_send_cmd(mgp, MXGEFW_SET_MAC_ADDRESS, &cmd, 0);
691 static int myri10ge_change_pause(struct myri10ge_priv *mgp, int pause)
693 struct myri10ge_cmd cmd;
696 ctl = pause ? MXGEFW_ENABLE_FLOW_CONTROL : MXGEFW_DISABLE_FLOW_CONTROL;
697 status = myri10ge_send_cmd(mgp, ctl, &cmd, 0);
701 "myri10ge: %s: Failed to set flow control mode\n",
710 myri10ge_change_promisc(struct myri10ge_priv *mgp, int promisc, int atomic)
712 struct myri10ge_cmd cmd;
715 ctl = promisc ? MXGEFW_ENABLE_PROMISC : MXGEFW_DISABLE_PROMISC;
716 status = myri10ge_send_cmd(mgp, ctl, &cmd, atomic);
718 printk(KERN_ERR "myri10ge: %s: Failed to set promisc mode\n",
722 static int myri10ge_dma_test(struct myri10ge_priv *mgp, int test_type)
724 struct myri10ge_cmd cmd;
727 struct page *dmatest_page;
728 dma_addr_t dmatest_bus;
731 dmatest_page = alloc_page(GFP_KERNEL);
734 dmatest_bus = pci_map_page(mgp->pdev, dmatest_page, 0, PAGE_SIZE,
737 /* Run a small DMA test.
738 * The magic multipliers to the length tell the firmware
739 * to do DMA read, write, or read+write tests. The
740 * results are returned in cmd.data0. The upper 16
741 * bits or the return is the number of transfers completed.
742 * The lower 16 bits is the time in 0.5us ticks that the
743 * transfers took to complete.
746 len = mgp->tx.boundary;
748 cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus);
749 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus);
750 cmd.data2 = len * 0x10000;
751 status = myri10ge_send_cmd(mgp, test_type, &cmd, 0);
756 mgp->read_dma = ((cmd.data0 >> 16) * len * 2) / (cmd.data0 & 0xffff);
757 cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus);
758 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus);
759 cmd.data2 = len * 0x1;
760 status = myri10ge_send_cmd(mgp, test_type, &cmd, 0);
765 mgp->write_dma = ((cmd.data0 >> 16) * len * 2) / (cmd.data0 & 0xffff);
767 cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus);
768 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus);
769 cmd.data2 = len * 0x10001;
770 status = myri10ge_send_cmd(mgp, test_type, &cmd, 0);
775 mgp->read_write_dma = ((cmd.data0 >> 16) * len * 2 * 2) /
776 (cmd.data0 & 0xffff);
779 pci_unmap_page(mgp->pdev, dmatest_bus, PAGE_SIZE, DMA_BIDIRECTIONAL);
780 put_page(dmatest_page);
782 if (status != 0 && test_type != MXGEFW_CMD_UNALIGNED_TEST)
783 dev_warn(&mgp->pdev->dev, "DMA %s benchmark failed: %d\n",
789 static int myri10ge_reset(struct myri10ge_priv *mgp)
791 struct myri10ge_cmd cmd;
795 /* try to send a reset command to the card to see if it
797 memset(&cmd, 0, sizeof(cmd));
798 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_RESET, &cmd, 0);
800 dev_err(&mgp->pdev->dev, "failed reset\n");
804 (void)myri10ge_dma_test(mgp, MXGEFW_DMA_TEST);
806 /* Now exchange information about interrupts */
808 bytes = myri10ge_max_intr_slots * sizeof(*mgp->rx_done.entry);
809 memset(mgp->rx_done.entry, 0, bytes);
810 cmd.data0 = (u32) bytes;
811 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_SIZE, &cmd, 0);
812 cmd.data0 = MYRI10GE_LOWPART_TO_U32(mgp->rx_done.bus);
813 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(mgp->rx_done.bus);
814 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_DMA, &cmd, 0);
817 myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_IRQ_ACK_OFFSET, &cmd, 0);
818 mgp->irq_claim = (__iomem __be32 *) (mgp->sram + cmd.data0);
819 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_IRQ_DEASSERT_OFFSET,
821 mgp->irq_deassert = (__iomem __be32 *) (mgp->sram + cmd.data0);
823 status |= myri10ge_send_cmd
824 (mgp, MXGEFW_CMD_GET_INTR_COAL_DELAY_OFFSET, &cmd, 0);
825 mgp->intr_coal_delay_ptr = (__iomem __be32 *) (mgp->sram + cmd.data0);
827 dev_err(&mgp->pdev->dev, "failed set interrupt parameters\n");
830 put_be32(htonl(mgp->intr_coal_delay), mgp->intr_coal_delay_ptr);
832 memset(mgp->rx_done.entry, 0, bytes);
834 /* reset mcp/driver shared state back to 0 */
837 mgp->tx.pkt_start = 0;
838 mgp->tx.pkt_done = 0;
840 mgp->rx_small.cnt = 0;
841 mgp->rx_done.idx = 0;
842 mgp->rx_done.cnt = 0;
843 mgp->link_changes = 0;
844 status = myri10ge_update_mac_address(mgp, mgp->dev->dev_addr);
845 myri10ge_change_pause(mgp, mgp->pause);
846 myri10ge_set_multicast_list(mgp->dev);
851 myri10ge_submit_8rx(struct mcp_kreq_ether_recv __iomem * dst,
852 struct mcp_kreq_ether_recv *src)
857 src->addr_low = htonl(DMA_32BIT_MASK);
858 myri10ge_pio_copy(dst, src, 4 * sizeof(*src));
860 myri10ge_pio_copy(dst + 4, src + 4, 4 * sizeof(*src));
863 put_be32(low, &dst->addr_low);
867 static inline void myri10ge_vlan_ip_csum(struct sk_buff *skb, __wsum hw_csum)
869 struct vlan_hdr *vh = (struct vlan_hdr *)(skb->data);
871 if ((skb->protocol == htons(ETH_P_8021Q)) &&
872 (vh->h_vlan_encapsulated_proto == htons(ETH_P_IP) ||
873 vh->h_vlan_encapsulated_proto == htons(ETH_P_IPV6))) {
875 skb->ip_summed = CHECKSUM_COMPLETE;
880 myri10ge_rx_skb_build(struct sk_buff *skb, u8 * va,
881 struct skb_frag_struct *rx_frags, int len, int hlen)
883 struct skb_frag_struct *skb_frags;
885 skb->len = skb->data_len = len;
886 skb->truesize = len + sizeof(struct sk_buff);
887 /* attach the page(s) */
889 skb_frags = skb_shinfo(skb)->frags;
891 memcpy(skb_frags, rx_frags, sizeof(*skb_frags));
892 len -= rx_frags->size;
895 skb_shinfo(skb)->nr_frags++;
898 /* pskb_may_pull is not available in irq context, but
899 * skb_pull() (for ether_pad and eth_type_trans()) requires
900 * the beginning of the packet in skb_headlen(), move it
902 skb_copy_to_linear_data(skb, va, hlen);
903 skb_shinfo(skb)->frags[0].page_offset += hlen;
904 skb_shinfo(skb)->frags[0].size -= hlen;
905 skb->data_len -= hlen;
907 skb_pull(skb, MXGEFW_PAD);
911 myri10ge_alloc_rx_pages(struct myri10ge_priv *mgp, struct myri10ge_rx_buf *rx,
912 int bytes, int watchdog)
917 if (unlikely(rx->watchdog_needed && !watchdog))
920 /* try to refill entire ring */
921 while (rx->fill_cnt != (rx->cnt + rx->mask + 1)) {
922 idx = rx->fill_cnt & rx->mask;
923 if (rx->page_offset + bytes <= MYRI10GE_ALLOC_SIZE) {
924 /* we can use part of previous page */
927 /* we need a new page */
929 alloc_pages(GFP_ATOMIC | __GFP_COMP,
930 MYRI10GE_ALLOC_ORDER);
931 if (unlikely(page == NULL)) {
932 if (rx->fill_cnt - rx->cnt < 16)
933 rx->watchdog_needed = 1;
938 rx->bus = pci_map_page(mgp->pdev, page, 0,
942 rx->info[idx].page = rx->page;
943 rx->info[idx].page_offset = rx->page_offset;
944 /* note that this is the address of the start of the
946 pci_unmap_addr_set(&rx->info[idx], bus, rx->bus);
947 rx->shadow[idx].addr_low =
948 htonl(MYRI10GE_LOWPART_TO_U32(rx->bus) + rx->page_offset);
949 rx->shadow[idx].addr_high =
950 htonl(MYRI10GE_HIGHPART_TO_U32(rx->bus));
952 /* start next packet on a cacheline boundary */
953 rx->page_offset += SKB_DATA_ALIGN(bytes);
955 #if MYRI10GE_ALLOC_SIZE > 4096
956 /* don't cross a 4KB boundary */
957 if ((rx->page_offset >> 12) !=
958 ((rx->page_offset + bytes - 1) >> 12))
959 rx->page_offset = (rx->page_offset + 4096) & ~4095;
963 /* copy 8 descriptors to the firmware at a time */
964 if ((idx & 7) == 7) {
965 if (rx->wc_fifo == NULL)
966 myri10ge_submit_8rx(&rx->lanai[idx - 7],
967 &rx->shadow[idx - 7]);
970 myri10ge_pio_copy(rx->wc_fifo,
971 &rx->shadow[idx - 7], 64);
978 myri10ge_unmap_rx_page(struct pci_dev *pdev,
979 struct myri10ge_rx_buffer_state *info, int bytes)
981 /* unmap the recvd page if we're the only or last user of it */
982 if (bytes >= MYRI10GE_ALLOC_SIZE / 2 ||
983 (info->page_offset + 2 * bytes) > MYRI10GE_ALLOC_SIZE) {
984 pci_unmap_page(pdev, (pci_unmap_addr(info, bus)
985 & ~(MYRI10GE_ALLOC_SIZE - 1)),
986 MYRI10GE_ALLOC_SIZE, PCI_DMA_FROMDEVICE);
990 #define MYRI10GE_HLEN 64 /* The number of bytes to copy from a
991 * page into an skb */
994 myri10ge_rx_done(struct myri10ge_priv *mgp, struct myri10ge_rx_buf *rx,
995 int bytes, int len, __wsum csum)
998 struct skb_frag_struct rx_frags[MYRI10GE_MAX_FRAGS_PER_FRAME];
999 int i, idx, hlen, remainder;
1000 struct pci_dev *pdev = mgp->pdev;
1001 struct net_device *dev = mgp->dev;
1005 idx = rx->cnt & rx->mask;
1006 va = page_address(rx->info[idx].page) + rx->info[idx].page_offset;
1008 /* Fill skb_frag_struct(s) with data from our receive */
1009 for (i = 0, remainder = len; remainder > 0; i++) {
1010 myri10ge_unmap_rx_page(pdev, &rx->info[idx], bytes);
1011 rx_frags[i].page = rx->info[idx].page;
1012 rx_frags[i].page_offset = rx->info[idx].page_offset;
1013 if (remainder < MYRI10GE_ALLOC_SIZE)
1014 rx_frags[i].size = remainder;
1016 rx_frags[i].size = MYRI10GE_ALLOC_SIZE;
1018 idx = rx->cnt & rx->mask;
1019 remainder -= MYRI10GE_ALLOC_SIZE;
1022 hlen = MYRI10GE_HLEN > len ? len : MYRI10GE_HLEN;
1024 /* allocate an skb to attach the page(s) to. */
1026 skb = netdev_alloc_skb(dev, MYRI10GE_HLEN + 16);
1027 if (unlikely(skb == NULL)) {
1028 mgp->stats.rx_dropped++;
1031 put_page(rx_frags[i].page);
1036 /* Attach the pages to the skb, and trim off any padding */
1037 myri10ge_rx_skb_build(skb, va, rx_frags, len, hlen);
1038 if (skb_shinfo(skb)->frags[0].size <= 0) {
1039 put_page(skb_shinfo(skb)->frags[0].page);
1040 skb_shinfo(skb)->nr_frags = 0;
1042 skb->protocol = eth_type_trans(skb, dev);
1044 if (mgp->csum_flag) {
1045 if ((skb->protocol == htons(ETH_P_IP)) ||
1046 (skb->protocol == htons(ETH_P_IPV6))) {
1048 skb->ip_summed = CHECKSUM_COMPLETE;
1050 myri10ge_vlan_ip_csum(skb, csum);
1052 netif_receive_skb(skb);
1053 dev->last_rx = jiffies;
1057 static inline void myri10ge_tx_done(struct myri10ge_priv *mgp, int mcp_index)
1059 struct pci_dev *pdev = mgp->pdev;
1060 struct myri10ge_tx_buf *tx = &mgp->tx;
1061 struct sk_buff *skb;
1065 while (tx->pkt_done != mcp_index) {
1066 idx = tx->done & tx->mask;
1067 skb = tx->info[idx].skb;
1070 tx->info[idx].skb = NULL;
1071 if (tx->info[idx].last) {
1073 tx->info[idx].last = 0;
1076 len = pci_unmap_len(&tx->info[idx], len);
1077 pci_unmap_len_set(&tx->info[idx], len, 0);
1079 mgp->stats.tx_bytes += skb->len;
1080 mgp->stats.tx_packets++;
1081 dev_kfree_skb_irq(skb);
1083 pci_unmap_single(pdev,
1084 pci_unmap_addr(&tx->info[idx],
1089 pci_unmap_page(pdev,
1090 pci_unmap_addr(&tx->info[idx],
1095 /* limit potential for livelock by only handling
1096 * 2 full tx rings per call */
1097 if (unlikely(++limit > 2 * tx->mask))
1100 /* start the queue if we've stopped it */
1101 if (netif_queue_stopped(mgp->dev)
1102 && tx->req - tx->done < (tx->mask >> 1)) {
1104 netif_wake_queue(mgp->dev);
1108 static inline void myri10ge_clean_rx_done(struct myri10ge_priv *mgp, int *limit)
1110 struct myri10ge_rx_done *rx_done = &mgp->rx_done;
1111 unsigned long rx_bytes = 0;
1112 unsigned long rx_packets = 0;
1113 unsigned long rx_ok;
1115 int idx = rx_done->idx;
1116 int cnt = rx_done->cnt;
1120 while (rx_done->entry[idx].length != 0 && *limit != 0) {
1121 length = ntohs(rx_done->entry[idx].length);
1122 rx_done->entry[idx].length = 0;
1123 checksum = csum_unfold(rx_done->entry[idx].checksum);
1124 if (length <= mgp->small_bytes)
1125 rx_ok = myri10ge_rx_done(mgp, &mgp->rx_small,
1129 rx_ok = myri10ge_rx_done(mgp, &mgp->rx_big,
1132 rx_packets += rx_ok;
1133 rx_bytes += rx_ok * (unsigned long)length;
1135 idx = cnt & (myri10ge_max_intr_slots - 1);
1137 /* limit potential for livelock by only handling a
1138 * limited number of frames. */
1143 mgp->stats.rx_packets += rx_packets;
1144 mgp->stats.rx_bytes += rx_bytes;
1146 /* restock receive rings if needed */
1147 if (mgp->rx_small.fill_cnt - mgp->rx_small.cnt < myri10ge_fill_thresh)
1148 myri10ge_alloc_rx_pages(mgp, &mgp->rx_small,
1149 mgp->small_bytes + MXGEFW_PAD, 0);
1150 if (mgp->rx_big.fill_cnt - mgp->rx_big.cnt < myri10ge_fill_thresh)
1151 myri10ge_alloc_rx_pages(mgp, &mgp->rx_big, mgp->big_bytes, 0);
1155 static inline void myri10ge_check_statblock(struct myri10ge_priv *mgp)
1157 struct mcp_irq_data *stats = mgp->fw_stats;
1159 if (unlikely(stats->stats_updated)) {
1160 unsigned link_up = ntohl(stats->link_up);
1161 if (mgp->link_state != link_up) {
1162 mgp->link_state = link_up;
1164 if (mgp->link_state == MXGEFW_LINK_UP) {
1165 if (netif_msg_link(mgp))
1167 "myri10ge: %s: link up\n",
1169 netif_carrier_on(mgp->dev);
1170 mgp->link_changes++;
1172 if (netif_msg_link(mgp))
1174 "myri10ge: %s: link %s\n",
1176 (link_up == MXGEFW_LINK_MYRINET ?
1177 "mismatch (Myrinet detected)" :
1179 netif_carrier_off(mgp->dev);
1180 mgp->link_changes++;
1183 if (mgp->rdma_tags_available !=
1184 ntohl(mgp->fw_stats->rdma_tags_available)) {
1185 mgp->rdma_tags_available =
1186 ntohl(mgp->fw_stats->rdma_tags_available);
1187 printk(KERN_WARNING "myri10ge: %s: RDMA timed out! "
1188 "%d tags left\n", mgp->dev->name,
1189 mgp->rdma_tags_available);
1191 mgp->down_cnt += stats->link_down;
1192 if (stats->link_down)
1193 wake_up(&mgp->down_wq);
1197 static int myri10ge_poll(struct net_device *netdev, int *budget)
1199 struct myri10ge_priv *mgp = netdev_priv(netdev);
1200 struct myri10ge_rx_done *rx_done = &mgp->rx_done;
1201 int limit, orig_limit, work_done;
1203 /* process as many rx events as NAPI will allow */
1204 limit = min(*budget, netdev->quota);
1206 myri10ge_clean_rx_done(mgp, &limit);
1207 work_done = orig_limit - limit;
1208 *budget -= work_done;
1209 netdev->quota -= work_done;
1211 if (rx_done->entry[rx_done->idx].length == 0 || !netif_running(netdev)) {
1212 netif_rx_complete(netdev);
1213 put_be32(htonl(3), mgp->irq_claim);
1219 static irqreturn_t myri10ge_intr(int irq, void *arg)
1221 struct myri10ge_priv *mgp = arg;
1222 struct mcp_irq_data *stats = mgp->fw_stats;
1223 struct myri10ge_tx_buf *tx = &mgp->tx;
1224 u32 send_done_count;
1227 /* make sure it is our IRQ, and that the DMA has finished */
1228 if (unlikely(!stats->valid))
1231 /* low bit indicates receives are present, so schedule
1232 * napi poll handler */
1233 if (stats->valid & 1)
1234 netif_rx_schedule(mgp->dev);
1236 if (!mgp->msi_enabled) {
1237 put_be32(0, mgp->irq_deassert);
1238 if (!myri10ge_deassert_wait)
1244 /* Wait for IRQ line to go low, if using INTx */
1248 /* check for transmit completes and receives */
1249 send_done_count = ntohl(stats->send_done_count);
1250 if (send_done_count != tx->pkt_done)
1251 myri10ge_tx_done(mgp, (int)send_done_count);
1252 if (unlikely(i > myri10ge_max_irq_loops)) {
1253 printk(KERN_WARNING "myri10ge: %s: irq stuck?\n",
1256 schedule_work(&mgp->watchdog_work);
1258 if (likely(stats->valid == 0))
1264 myri10ge_check_statblock(mgp);
1266 put_be32(htonl(3), mgp->irq_claim + 1);
1267 return (IRQ_HANDLED);
1271 myri10ge_get_settings(struct net_device *netdev, struct ethtool_cmd *cmd)
1273 cmd->autoneg = AUTONEG_DISABLE;
1274 cmd->speed = SPEED_10000;
1275 cmd->duplex = DUPLEX_FULL;
1280 myri10ge_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
1282 struct myri10ge_priv *mgp = netdev_priv(netdev);
1284 strlcpy(info->driver, "myri10ge", sizeof(info->driver));
1285 strlcpy(info->version, MYRI10GE_VERSION_STR, sizeof(info->version));
1286 strlcpy(info->fw_version, mgp->fw_version, sizeof(info->fw_version));
1287 strlcpy(info->bus_info, pci_name(mgp->pdev), sizeof(info->bus_info));
1291 myri10ge_get_coalesce(struct net_device *netdev, struct ethtool_coalesce *coal)
1293 struct myri10ge_priv *mgp = netdev_priv(netdev);
1294 coal->rx_coalesce_usecs = mgp->intr_coal_delay;
1299 myri10ge_set_coalesce(struct net_device *netdev, struct ethtool_coalesce *coal)
1301 struct myri10ge_priv *mgp = netdev_priv(netdev);
1303 mgp->intr_coal_delay = coal->rx_coalesce_usecs;
1304 put_be32(htonl(mgp->intr_coal_delay), mgp->intr_coal_delay_ptr);
1309 myri10ge_get_pauseparam(struct net_device *netdev,
1310 struct ethtool_pauseparam *pause)
1312 struct myri10ge_priv *mgp = netdev_priv(netdev);
1315 pause->rx_pause = mgp->pause;
1316 pause->tx_pause = mgp->pause;
1320 myri10ge_set_pauseparam(struct net_device *netdev,
1321 struct ethtool_pauseparam *pause)
1323 struct myri10ge_priv *mgp = netdev_priv(netdev);
1325 if (pause->tx_pause != mgp->pause)
1326 return myri10ge_change_pause(mgp, pause->tx_pause);
1327 if (pause->rx_pause != mgp->pause)
1328 return myri10ge_change_pause(mgp, pause->tx_pause);
1329 if (pause->autoneg != 0)
1335 myri10ge_get_ringparam(struct net_device *netdev,
1336 struct ethtool_ringparam *ring)
1338 struct myri10ge_priv *mgp = netdev_priv(netdev);
1340 ring->rx_mini_max_pending = mgp->rx_small.mask + 1;
1341 ring->rx_max_pending = mgp->rx_big.mask + 1;
1342 ring->rx_jumbo_max_pending = 0;
1343 ring->tx_max_pending = mgp->rx_small.mask + 1;
1344 ring->rx_mini_pending = ring->rx_mini_max_pending;
1345 ring->rx_pending = ring->rx_max_pending;
1346 ring->rx_jumbo_pending = ring->rx_jumbo_max_pending;
1347 ring->tx_pending = ring->tx_max_pending;
1350 static u32 myri10ge_get_rx_csum(struct net_device *netdev)
1352 struct myri10ge_priv *mgp = netdev_priv(netdev);
1359 static int myri10ge_set_rx_csum(struct net_device *netdev, u32 csum_enabled)
1361 struct myri10ge_priv *mgp = netdev_priv(netdev);
1363 mgp->csum_flag = MXGEFW_FLAGS_CKSUM;
1369 static const char myri10ge_gstrings_stats[][ETH_GSTRING_LEN] = {
1370 "rx_packets", "tx_packets", "rx_bytes", "tx_bytes", "rx_errors",
1371 "tx_errors", "rx_dropped", "tx_dropped", "multicast", "collisions",
1372 "rx_length_errors", "rx_over_errors", "rx_crc_errors",
1373 "rx_frame_errors", "rx_fifo_errors", "rx_missed_errors",
1374 "tx_aborted_errors", "tx_carrier_errors", "tx_fifo_errors",
1375 "tx_heartbeat_errors", "tx_window_errors",
1376 /* device-specific stats */
1377 "tx_boundary", "WC", "irq", "MSI",
1378 "read_dma_bw_MBs", "write_dma_bw_MBs", "read_write_dma_bw_MBs",
1379 "serial_number", "tx_pkt_start", "tx_pkt_done",
1380 "tx_req", "tx_done", "rx_small_cnt", "rx_big_cnt",
1381 "wake_queue", "stop_queue", "watchdog_resets", "tx_linearized",
1382 "link_changes", "link_up", "dropped_link_overflow",
1383 "dropped_link_error_or_filtered",
1384 "dropped_pause", "dropped_bad_phy", "dropped_bad_crc32",
1385 "dropped_unicast_filtered", "dropped_multicast_filtered",
1386 "dropped_runt", "dropped_overrun", "dropped_no_small_buffer",
1387 "dropped_no_big_buffer"
1390 #define MYRI10GE_NET_STATS_LEN 21
1391 #define MYRI10GE_STATS_LEN sizeof(myri10ge_gstrings_stats) / ETH_GSTRING_LEN
1394 myri10ge_get_strings(struct net_device *netdev, u32 stringset, u8 * data)
1396 switch (stringset) {
1398 memcpy(data, *myri10ge_gstrings_stats,
1399 sizeof(myri10ge_gstrings_stats));
1404 static int myri10ge_get_stats_count(struct net_device *netdev)
1406 return MYRI10GE_STATS_LEN;
1410 myri10ge_get_ethtool_stats(struct net_device *netdev,
1411 struct ethtool_stats *stats, u64 * data)
1413 struct myri10ge_priv *mgp = netdev_priv(netdev);
1416 for (i = 0; i < MYRI10GE_NET_STATS_LEN; i++)
1417 data[i] = ((unsigned long *)&mgp->stats)[i];
1419 data[i++] = (unsigned int)mgp->tx.boundary;
1420 data[i++] = (unsigned int)mgp->wc_enabled;
1421 data[i++] = (unsigned int)mgp->pdev->irq;
1422 data[i++] = (unsigned int)mgp->msi_enabled;
1423 data[i++] = (unsigned int)mgp->read_dma;
1424 data[i++] = (unsigned int)mgp->write_dma;
1425 data[i++] = (unsigned int)mgp->read_write_dma;
1426 data[i++] = (unsigned int)mgp->serial_number;
1427 data[i++] = (unsigned int)mgp->tx.pkt_start;
1428 data[i++] = (unsigned int)mgp->tx.pkt_done;
1429 data[i++] = (unsigned int)mgp->tx.req;
1430 data[i++] = (unsigned int)mgp->tx.done;
1431 data[i++] = (unsigned int)mgp->rx_small.cnt;
1432 data[i++] = (unsigned int)mgp->rx_big.cnt;
1433 data[i++] = (unsigned int)mgp->wake_queue;
1434 data[i++] = (unsigned int)mgp->stop_queue;
1435 data[i++] = (unsigned int)mgp->watchdog_resets;
1436 data[i++] = (unsigned int)mgp->tx_linearized;
1437 data[i++] = (unsigned int)mgp->link_changes;
1438 data[i++] = (unsigned int)ntohl(mgp->fw_stats->link_up);
1439 data[i++] = (unsigned int)ntohl(mgp->fw_stats->dropped_link_overflow);
1441 (unsigned int)ntohl(mgp->fw_stats->dropped_link_error_or_filtered);
1442 data[i++] = (unsigned int)ntohl(mgp->fw_stats->dropped_pause);
1443 data[i++] = (unsigned int)ntohl(mgp->fw_stats->dropped_bad_phy);
1444 data[i++] = (unsigned int)ntohl(mgp->fw_stats->dropped_bad_crc32);
1446 (unsigned int)ntohl(mgp->fw_stats->dropped_unicast_filtered);
1448 (unsigned int)ntohl(mgp->fw_stats->dropped_multicast_filtered);
1449 data[i++] = (unsigned int)ntohl(mgp->fw_stats->dropped_runt);
1450 data[i++] = (unsigned int)ntohl(mgp->fw_stats->dropped_overrun);
1451 data[i++] = (unsigned int)ntohl(mgp->fw_stats->dropped_no_small_buffer);
1452 data[i++] = (unsigned int)ntohl(mgp->fw_stats->dropped_no_big_buffer);
1455 static void myri10ge_set_msglevel(struct net_device *netdev, u32 value)
1457 struct myri10ge_priv *mgp = netdev_priv(netdev);
1458 mgp->msg_enable = value;
1461 static u32 myri10ge_get_msglevel(struct net_device *netdev)
1463 struct myri10ge_priv *mgp = netdev_priv(netdev);
1464 return mgp->msg_enable;
1467 static const struct ethtool_ops myri10ge_ethtool_ops = {
1468 .get_settings = myri10ge_get_settings,
1469 .get_drvinfo = myri10ge_get_drvinfo,
1470 .get_coalesce = myri10ge_get_coalesce,
1471 .set_coalesce = myri10ge_set_coalesce,
1472 .get_pauseparam = myri10ge_get_pauseparam,
1473 .set_pauseparam = myri10ge_set_pauseparam,
1474 .get_ringparam = myri10ge_get_ringparam,
1475 .get_rx_csum = myri10ge_get_rx_csum,
1476 .set_rx_csum = myri10ge_set_rx_csum,
1477 .get_tx_csum = ethtool_op_get_tx_csum,
1478 .set_tx_csum = ethtool_op_set_tx_hw_csum,
1479 .get_sg = ethtool_op_get_sg,
1480 .set_sg = ethtool_op_set_sg,
1481 .get_tso = ethtool_op_get_tso,
1482 .set_tso = ethtool_op_set_tso,
1483 .get_link = ethtool_op_get_link,
1484 .get_strings = myri10ge_get_strings,
1485 .get_stats_count = myri10ge_get_stats_count,
1486 .get_ethtool_stats = myri10ge_get_ethtool_stats,
1487 .set_msglevel = myri10ge_set_msglevel,
1488 .get_msglevel = myri10ge_get_msglevel
1491 static int myri10ge_allocate_rings(struct net_device *dev)
1493 struct myri10ge_priv *mgp;
1494 struct myri10ge_cmd cmd;
1495 int tx_ring_size, rx_ring_size;
1496 int tx_ring_entries, rx_ring_entries;
1500 mgp = netdev_priv(dev);
1502 /* get ring sizes */
1504 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SEND_RING_SIZE, &cmd, 0);
1505 tx_ring_size = cmd.data0;
1506 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_RX_RING_SIZE, &cmd, 0);
1509 rx_ring_size = cmd.data0;
1511 tx_ring_entries = tx_ring_size / sizeof(struct mcp_kreq_ether_send);
1512 rx_ring_entries = rx_ring_size / sizeof(struct mcp_dma_addr);
1513 mgp->tx.mask = tx_ring_entries - 1;
1514 mgp->rx_small.mask = mgp->rx_big.mask = rx_ring_entries - 1;
1518 /* allocate the host shadow rings */
1520 bytes = 8 + (MYRI10GE_MAX_SEND_DESC_TSO + 4)
1521 * sizeof(*mgp->tx.req_list);
1522 mgp->tx.req_bytes = kzalloc(bytes, GFP_KERNEL);
1523 if (mgp->tx.req_bytes == NULL)
1524 goto abort_with_nothing;
1526 /* ensure req_list entries are aligned to 8 bytes */
1527 mgp->tx.req_list = (struct mcp_kreq_ether_send *)
1528 ALIGN((unsigned long)mgp->tx.req_bytes, 8);
1530 bytes = rx_ring_entries * sizeof(*mgp->rx_small.shadow);
1531 mgp->rx_small.shadow = kzalloc(bytes, GFP_KERNEL);
1532 if (mgp->rx_small.shadow == NULL)
1533 goto abort_with_tx_req_bytes;
1535 bytes = rx_ring_entries * sizeof(*mgp->rx_big.shadow);
1536 mgp->rx_big.shadow = kzalloc(bytes, GFP_KERNEL);
1537 if (mgp->rx_big.shadow == NULL)
1538 goto abort_with_rx_small_shadow;
1540 /* allocate the host info rings */
1542 bytes = tx_ring_entries * sizeof(*mgp->tx.info);
1543 mgp->tx.info = kzalloc(bytes, GFP_KERNEL);
1544 if (mgp->tx.info == NULL)
1545 goto abort_with_rx_big_shadow;
1547 bytes = rx_ring_entries * sizeof(*mgp->rx_small.info);
1548 mgp->rx_small.info = kzalloc(bytes, GFP_KERNEL);
1549 if (mgp->rx_small.info == NULL)
1550 goto abort_with_tx_info;
1552 bytes = rx_ring_entries * sizeof(*mgp->rx_big.info);
1553 mgp->rx_big.info = kzalloc(bytes, GFP_KERNEL);
1554 if (mgp->rx_big.info == NULL)
1555 goto abort_with_rx_small_info;
1557 /* Fill the receive rings */
1558 mgp->rx_big.cnt = 0;
1559 mgp->rx_small.cnt = 0;
1560 mgp->rx_big.fill_cnt = 0;
1561 mgp->rx_small.fill_cnt = 0;
1562 mgp->rx_small.page_offset = MYRI10GE_ALLOC_SIZE;
1563 mgp->rx_big.page_offset = MYRI10GE_ALLOC_SIZE;
1564 mgp->rx_small.watchdog_needed = 0;
1565 mgp->rx_big.watchdog_needed = 0;
1566 myri10ge_alloc_rx_pages(mgp, &mgp->rx_small,
1567 mgp->small_bytes + MXGEFW_PAD, 0);
1569 if (mgp->rx_small.fill_cnt < mgp->rx_small.mask + 1) {
1570 printk(KERN_ERR "myri10ge: %s: alloced only %d small bufs\n",
1571 dev->name, mgp->rx_small.fill_cnt);
1572 goto abort_with_rx_small_ring;
1575 myri10ge_alloc_rx_pages(mgp, &mgp->rx_big, mgp->big_bytes, 0);
1576 if (mgp->rx_big.fill_cnt < mgp->rx_big.mask + 1) {
1577 printk(KERN_ERR "myri10ge: %s: alloced only %d big bufs\n",
1578 dev->name, mgp->rx_big.fill_cnt);
1579 goto abort_with_rx_big_ring;
1584 abort_with_rx_big_ring:
1585 for (i = mgp->rx_big.cnt; i < mgp->rx_big.fill_cnt; i++) {
1586 int idx = i & mgp->rx_big.mask;
1587 myri10ge_unmap_rx_page(mgp->pdev, &mgp->rx_big.info[idx],
1589 put_page(mgp->rx_big.info[idx].page);
1592 abort_with_rx_small_ring:
1593 for (i = mgp->rx_small.cnt; i < mgp->rx_small.fill_cnt; i++) {
1594 int idx = i & mgp->rx_small.mask;
1595 myri10ge_unmap_rx_page(mgp->pdev, &mgp->rx_small.info[idx],
1596 mgp->small_bytes + MXGEFW_PAD);
1597 put_page(mgp->rx_small.info[idx].page);
1600 kfree(mgp->rx_big.info);
1602 abort_with_rx_small_info:
1603 kfree(mgp->rx_small.info);
1606 kfree(mgp->tx.info);
1608 abort_with_rx_big_shadow:
1609 kfree(mgp->rx_big.shadow);
1611 abort_with_rx_small_shadow:
1612 kfree(mgp->rx_small.shadow);
1614 abort_with_tx_req_bytes:
1615 kfree(mgp->tx.req_bytes);
1616 mgp->tx.req_bytes = NULL;
1617 mgp->tx.req_list = NULL;
1623 static void myri10ge_free_rings(struct net_device *dev)
1625 struct myri10ge_priv *mgp;
1626 struct sk_buff *skb;
1627 struct myri10ge_tx_buf *tx;
1630 mgp = netdev_priv(dev);
1632 for (i = mgp->rx_big.cnt; i < mgp->rx_big.fill_cnt; i++) {
1633 idx = i & mgp->rx_big.mask;
1634 if (i == mgp->rx_big.fill_cnt - 1)
1635 mgp->rx_big.info[idx].page_offset = MYRI10GE_ALLOC_SIZE;
1636 myri10ge_unmap_rx_page(mgp->pdev, &mgp->rx_big.info[idx],
1638 put_page(mgp->rx_big.info[idx].page);
1641 for (i = mgp->rx_small.cnt; i < mgp->rx_small.fill_cnt; i++) {
1642 idx = i & mgp->rx_small.mask;
1643 if (i == mgp->rx_small.fill_cnt - 1)
1644 mgp->rx_small.info[idx].page_offset =
1645 MYRI10GE_ALLOC_SIZE;
1646 myri10ge_unmap_rx_page(mgp->pdev, &mgp->rx_small.info[idx],
1647 mgp->small_bytes + MXGEFW_PAD);
1648 put_page(mgp->rx_small.info[idx].page);
1651 while (tx->done != tx->req) {
1652 idx = tx->done & tx->mask;
1653 skb = tx->info[idx].skb;
1656 tx->info[idx].skb = NULL;
1658 len = pci_unmap_len(&tx->info[idx], len);
1659 pci_unmap_len_set(&tx->info[idx], len, 0);
1661 mgp->stats.tx_dropped++;
1662 dev_kfree_skb_any(skb);
1664 pci_unmap_single(mgp->pdev,
1665 pci_unmap_addr(&tx->info[idx],
1670 pci_unmap_page(mgp->pdev,
1671 pci_unmap_addr(&tx->info[idx],
1676 kfree(mgp->rx_big.info);
1678 kfree(mgp->rx_small.info);
1680 kfree(mgp->tx.info);
1682 kfree(mgp->rx_big.shadow);
1684 kfree(mgp->rx_small.shadow);
1686 kfree(mgp->tx.req_bytes);
1687 mgp->tx.req_bytes = NULL;
1688 mgp->tx.req_list = NULL;
1691 static int myri10ge_request_irq(struct myri10ge_priv *mgp)
1693 struct pci_dev *pdev = mgp->pdev;
1697 status = pci_enable_msi(pdev);
1700 "Error %d setting up MSI; falling back to xPIC\n",
1703 mgp->msi_enabled = 1;
1705 mgp->msi_enabled = 0;
1707 status = request_irq(pdev->irq, myri10ge_intr, IRQF_SHARED,
1708 mgp->dev->name, mgp);
1710 dev_err(&pdev->dev, "failed to allocate IRQ\n");
1711 if (mgp->msi_enabled)
1712 pci_disable_msi(pdev);
1717 static void myri10ge_free_irq(struct myri10ge_priv *mgp)
1719 struct pci_dev *pdev = mgp->pdev;
1721 free_irq(pdev->irq, mgp);
1722 if (mgp->msi_enabled)
1723 pci_disable_msi(pdev);
1726 static int myri10ge_open(struct net_device *dev)
1728 struct myri10ge_priv *mgp;
1729 struct myri10ge_cmd cmd;
1730 int status, big_pow2;
1732 mgp = netdev_priv(dev);
1734 if (mgp->running != MYRI10GE_ETH_STOPPED)
1737 mgp->running = MYRI10GE_ETH_STARTING;
1738 status = myri10ge_reset(mgp);
1740 printk(KERN_ERR "myri10ge: %s: failed reset\n", dev->name);
1741 goto abort_with_nothing;
1744 status = myri10ge_request_irq(mgp);
1746 goto abort_with_nothing;
1748 /* decide what small buffer size to use. For good TCP rx
1749 * performance, it is important to not receive 1514 byte
1750 * frames into jumbo buffers, as it confuses the socket buffer
1751 * accounting code, leading to drops and erratic performance.
1754 if (dev->mtu <= ETH_DATA_LEN)
1755 /* enough for a TCP header */
1756 mgp->small_bytes = (128 > SMP_CACHE_BYTES)
1757 ? (128 - MXGEFW_PAD)
1758 : (SMP_CACHE_BYTES - MXGEFW_PAD);
1760 /* enough for a vlan encapsulated ETH_DATA_LEN frame */
1761 mgp->small_bytes = VLAN_ETH_FRAME_LEN;
1763 /* Override the small buffer size? */
1764 if (myri10ge_small_bytes > 0)
1765 mgp->small_bytes = myri10ge_small_bytes;
1767 /* get the lanai pointers to the send and receive rings */
1769 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SEND_OFFSET, &cmd, 0);
1771 (struct mcp_kreq_ether_send __iomem *)(mgp->sram + cmd.data0);
1774 myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SMALL_RX_OFFSET, &cmd, 0);
1775 mgp->rx_small.lanai =
1776 (struct mcp_kreq_ether_recv __iomem *)(mgp->sram + cmd.data0);
1778 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_BIG_RX_OFFSET, &cmd, 0);
1780 (struct mcp_kreq_ether_recv __iomem *)(mgp->sram + cmd.data0);
1784 "myri10ge: %s: failed to get ring sizes or locations\n",
1786 mgp->running = MYRI10GE_ETH_STOPPED;
1787 goto abort_with_irq;
1790 if (myri10ge_wcfifo && mgp->wc_enabled) {
1791 mgp->tx.wc_fifo = (u8 __iomem *) mgp->sram + MXGEFW_ETH_SEND_4;
1792 mgp->rx_small.wc_fifo =
1793 (u8 __iomem *) mgp->sram + MXGEFW_ETH_RECV_SMALL;
1794 mgp->rx_big.wc_fifo =
1795 (u8 __iomem *) mgp->sram + MXGEFW_ETH_RECV_BIG;
1797 mgp->tx.wc_fifo = NULL;
1798 mgp->rx_small.wc_fifo = NULL;
1799 mgp->rx_big.wc_fifo = NULL;
1802 /* Firmware needs the big buff size as a power of 2. Lie and
1803 * tell him the buffer is larger, because we only use 1
1804 * buffer/pkt, and the mtu will prevent overruns.
1806 big_pow2 = dev->mtu + ETH_HLEN + VLAN_HLEN + MXGEFW_PAD;
1807 if (big_pow2 < MYRI10GE_ALLOC_SIZE / 2) {
1808 while (!is_power_of_2(big_pow2))
1810 mgp->big_bytes = dev->mtu + ETH_HLEN + VLAN_HLEN + MXGEFW_PAD;
1812 big_pow2 = MYRI10GE_ALLOC_SIZE;
1813 mgp->big_bytes = big_pow2;
1816 status = myri10ge_allocate_rings(dev);
1818 goto abort_with_irq;
1820 /* now give firmware buffers sizes, and MTU */
1821 cmd.data0 = dev->mtu + ETH_HLEN + VLAN_HLEN;
1822 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_MTU, &cmd, 0);
1823 cmd.data0 = mgp->small_bytes;
1825 myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_SMALL_BUFFER_SIZE, &cmd, 0);
1826 cmd.data0 = big_pow2;
1828 myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_BIG_BUFFER_SIZE, &cmd, 0);
1830 printk(KERN_ERR "myri10ge: %s: Couldn't set buffer sizes\n",
1832 goto abort_with_rings;
1835 cmd.data0 = MYRI10GE_LOWPART_TO_U32(mgp->fw_stats_bus);
1836 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(mgp->fw_stats_bus);
1837 cmd.data2 = sizeof(struct mcp_irq_data);
1838 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_STATS_DMA_V2, &cmd, 0);
1839 if (status == -ENOSYS) {
1840 dma_addr_t bus = mgp->fw_stats_bus;
1841 bus += offsetof(struct mcp_irq_data, send_done_count);
1842 cmd.data0 = MYRI10GE_LOWPART_TO_U32(bus);
1843 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(bus);
1844 status = myri10ge_send_cmd(mgp,
1845 MXGEFW_CMD_SET_STATS_DMA_OBSOLETE,
1847 /* Firmware cannot support multicast without STATS_DMA_V2 */
1848 mgp->fw_multicast_support = 0;
1850 mgp->fw_multicast_support = 1;
1853 printk(KERN_ERR "myri10ge: %s: Couldn't set stats DMA\n",
1855 goto abort_with_rings;
1858 mgp->link_state = htonl(~0U);
1859 mgp->rdma_tags_available = 15;
1861 netif_poll_enable(mgp->dev); /* must happen prior to any irq */
1863 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ETHERNET_UP, &cmd, 0);
1865 printk(KERN_ERR "myri10ge: %s: Couldn't bring up link\n",
1867 goto abort_with_rings;
1870 mgp->wake_queue = 0;
1871 mgp->stop_queue = 0;
1872 mgp->running = MYRI10GE_ETH_RUNNING;
1873 mgp->watchdog_timer.expires = jiffies + myri10ge_watchdog_timeout * HZ;
1874 add_timer(&mgp->watchdog_timer);
1875 netif_wake_queue(dev);
1879 myri10ge_free_rings(dev);
1882 myri10ge_free_irq(mgp);
1885 mgp->running = MYRI10GE_ETH_STOPPED;
1889 static int myri10ge_close(struct net_device *dev)
1891 struct myri10ge_priv *mgp;
1892 struct myri10ge_cmd cmd;
1893 int status, old_down_cnt;
1895 mgp = netdev_priv(dev);
1897 if (mgp->running != MYRI10GE_ETH_RUNNING)
1900 if (mgp->tx.req_bytes == NULL)
1903 del_timer_sync(&mgp->watchdog_timer);
1904 mgp->running = MYRI10GE_ETH_STOPPING;
1905 netif_poll_disable(mgp->dev);
1906 netif_carrier_off(dev);
1907 netif_stop_queue(dev);
1908 old_down_cnt = mgp->down_cnt;
1910 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ETHERNET_DOWN, &cmd, 0);
1912 printk(KERN_ERR "myri10ge: %s: Couldn't bring down link\n",
1915 wait_event_timeout(mgp->down_wq, old_down_cnt != mgp->down_cnt, HZ);
1916 if (old_down_cnt == mgp->down_cnt)
1917 printk(KERN_ERR "myri10ge: %s never got down irq\n", dev->name);
1919 netif_tx_disable(dev);
1920 myri10ge_free_irq(mgp);
1921 myri10ge_free_rings(dev);
1923 mgp->running = MYRI10GE_ETH_STOPPED;
1927 /* copy an array of struct mcp_kreq_ether_send's to the mcp. Copy
1928 * backwards one at a time and handle ring wraps */
1931 myri10ge_submit_req_backwards(struct myri10ge_tx_buf *tx,
1932 struct mcp_kreq_ether_send *src, int cnt)
1934 int idx, starting_slot;
1935 starting_slot = tx->req;
1938 idx = (starting_slot + cnt) & tx->mask;
1939 myri10ge_pio_copy(&tx->lanai[idx], &src[cnt], sizeof(*src));
1945 * copy an array of struct mcp_kreq_ether_send's to the mcp. Copy
1946 * at most 32 bytes at a time, so as to avoid involving the software
1947 * pio handler in the nic. We re-write the first segment's flags
1948 * to mark them valid only after writing the entire chain.
1952 myri10ge_submit_req(struct myri10ge_tx_buf *tx, struct mcp_kreq_ether_send *src,
1956 struct mcp_kreq_ether_send __iomem *dstp, *dst;
1957 struct mcp_kreq_ether_send *srcp;
1960 idx = tx->req & tx->mask;
1962 last_flags = src->flags;
1965 dst = dstp = &tx->lanai[idx];
1968 if ((idx + cnt) < tx->mask) {
1969 for (i = 0; i < (cnt - 1); i += 2) {
1970 myri10ge_pio_copy(dstp, srcp, 2 * sizeof(*src));
1971 mb(); /* force write every 32 bytes */
1976 /* submit all but the first request, and ensure
1977 * that it is submitted below */
1978 myri10ge_submit_req_backwards(tx, src, cnt);
1982 /* submit the first request */
1983 myri10ge_pio_copy(dstp, srcp, sizeof(*src));
1984 mb(); /* barrier before setting valid flag */
1987 /* re-write the last 32-bits with the valid flags */
1988 src->flags = last_flags;
1989 put_be32(*((__be32 *) src + 3), (__be32 __iomem *) dst + 3);
1995 myri10ge_submit_req_wc(struct myri10ge_tx_buf *tx,
1996 struct mcp_kreq_ether_send *src, int cnt)
2001 myri10ge_pio_copy(tx->wc_fifo, src, 64);
2007 /* pad it to 64 bytes. The src is 64 bytes bigger than it
2008 * needs to be so that we don't overrun it */
2009 myri10ge_pio_copy(tx->wc_fifo + MXGEFW_ETH_SEND_OFFSET(cnt),
2016 * Transmit a packet. We need to split the packet so that a single
2017 * segment does not cross myri10ge->tx.boundary, so this makes segment
2018 * counting tricky. So rather than try to count segments up front, we
2019 * just give up if there are too few segments to hold a reasonably
2020 * fragmented packet currently available. If we run
2021 * out of segments while preparing a packet for DMA, we just linearize
2025 static int myri10ge_xmit(struct sk_buff *skb, struct net_device *dev)
2027 struct myri10ge_priv *mgp = netdev_priv(dev);
2028 struct mcp_kreq_ether_send *req;
2029 struct myri10ge_tx_buf *tx = &mgp->tx;
2030 struct skb_frag_struct *frag;
2033 __be32 high_swapped;
2035 int idx, last_idx, avail, frag_cnt, frag_idx, count, mss, max_segments;
2036 u16 pseudo_hdr_offset, cksum_offset;
2037 int cum_len, seglen, boundary, rdma_count;
2042 avail = tx->mask - 1 - (tx->req - tx->done);
2045 max_segments = MXGEFW_MAX_SEND_DESC;
2047 if (skb_is_gso(skb)) {
2048 mss = skb_shinfo(skb)->gso_size;
2049 max_segments = MYRI10GE_MAX_SEND_DESC_TSO;
2052 if ((unlikely(avail < max_segments))) {
2053 /* we are out of transmit resources */
2055 netif_stop_queue(dev);
2059 /* Setup checksum offloading, if needed */
2061 pseudo_hdr_offset = 0;
2063 flags = (MXGEFW_FLAGS_NO_TSO | MXGEFW_FLAGS_FIRST);
2064 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2065 cksum_offset = skb_transport_offset(skb);
2066 pseudo_hdr_offset = cksum_offset + skb->csum_offset;
2067 /* If the headers are excessively large, then we must
2068 * fall back to a software checksum */
2069 if (unlikely(cksum_offset > 255 || pseudo_hdr_offset > 127)) {
2070 if (skb_checksum_help(skb))
2073 pseudo_hdr_offset = 0;
2075 odd_flag = MXGEFW_FLAGS_ALIGN_ODD;
2076 flags |= MXGEFW_FLAGS_CKSUM;
2082 if (mss) { /* TSO */
2083 /* this removes any CKSUM flag from before */
2084 flags = (MXGEFW_FLAGS_TSO_HDR | MXGEFW_FLAGS_FIRST);
2086 /* negative cum_len signifies to the
2087 * send loop that we are still in the
2088 * header portion of the TSO packet.
2089 * TSO header must be at most 134 bytes long */
2090 cum_len = -(skb_transport_offset(skb) + tcp_hdrlen(skb));
2092 /* for TSO, pseudo_hdr_offset holds mss.
2093 * The firmware figures out where to put
2094 * the checksum by parsing the header. */
2095 pseudo_hdr_offset = mss;
2097 /* Mark small packets, and pad out tiny packets */
2098 if (skb->len <= MXGEFW_SEND_SMALL_SIZE) {
2099 flags |= MXGEFW_FLAGS_SMALL;
2101 /* pad frames to at least ETH_ZLEN bytes */
2102 if (unlikely(skb->len < ETH_ZLEN)) {
2103 if (skb_padto(skb, ETH_ZLEN)) {
2104 /* The packet is gone, so we must
2106 mgp->stats.tx_dropped += 1;
2109 /* adjust the len to account for the zero pad
2110 * so that the nic can know how long it is */
2111 skb->len = ETH_ZLEN;
2115 /* map the skb for DMA */
2116 len = skb->len - skb->data_len;
2117 idx = tx->req & tx->mask;
2118 tx->info[idx].skb = skb;
2119 bus = pci_map_single(mgp->pdev, skb->data, len, PCI_DMA_TODEVICE);
2120 pci_unmap_addr_set(&tx->info[idx], bus, bus);
2121 pci_unmap_len_set(&tx->info[idx], len, len);
2123 frag_cnt = skb_shinfo(skb)->nr_frags;
2128 /* "rdma_count" is the number of RDMAs belonging to the
2129 * current packet BEFORE the current send request. For
2130 * non-TSO packets, this is equal to "count".
2131 * For TSO packets, rdma_count needs to be reset
2132 * to 0 after a segment cut.
2134 * The rdma_count field of the send request is
2135 * the number of RDMAs of the packet starting at
2136 * that request. For TSO send requests with one ore more cuts
2137 * in the middle, this is the number of RDMAs starting
2138 * after the last cut in the request. All previous
2139 * segments before the last cut implicitly have 1 RDMA.
2141 * Since the number of RDMAs is not known beforehand,
2142 * it must be filled-in retroactively - after each
2143 * segmentation cut or at the end of the entire packet.
2147 /* Break the SKB or Fragment up into pieces which
2148 * do not cross mgp->tx.boundary */
2149 low = MYRI10GE_LOWPART_TO_U32(bus);
2150 high_swapped = htonl(MYRI10GE_HIGHPART_TO_U32(bus));
2155 if (unlikely(count == max_segments))
2156 goto abort_linearize;
2158 boundary = (low + tx->boundary) & ~(tx->boundary - 1);
2159 seglen = boundary - low;
2162 flags_next = flags & ~MXGEFW_FLAGS_FIRST;
2163 cum_len_next = cum_len + seglen;
2164 if (mss) { /* TSO */
2165 (req - rdma_count)->rdma_count = rdma_count + 1;
2167 if (likely(cum_len >= 0)) { /* payload */
2168 int next_is_first, chop;
2170 chop = (cum_len_next > mss);
2171 cum_len_next = cum_len_next % mss;
2172 next_is_first = (cum_len_next == 0);
2173 flags |= chop * MXGEFW_FLAGS_TSO_CHOP;
2174 flags_next |= next_is_first *
2176 rdma_count |= -(chop | next_is_first);
2177 rdma_count += chop & !next_is_first;
2178 } else if (likely(cum_len_next >= 0)) { /* header ends */
2184 small = (mss <= MXGEFW_SEND_SMALL_SIZE);
2185 flags_next = MXGEFW_FLAGS_TSO_PLD |
2186 MXGEFW_FLAGS_FIRST |
2187 (small * MXGEFW_FLAGS_SMALL);
2190 req->addr_high = high_swapped;
2191 req->addr_low = htonl(low);
2192 req->pseudo_hdr_offset = htons(pseudo_hdr_offset);
2193 req->pad = 0; /* complete solid 16-byte block; does this matter? */
2194 req->rdma_count = 1;
2195 req->length = htons(seglen);
2196 req->cksum_offset = cksum_offset;
2197 req->flags = flags | ((cum_len & 1) * odd_flag);
2201 cum_len = cum_len_next;
2206 if (unlikely(cksum_offset > seglen))
2207 cksum_offset -= seglen;
2211 if (frag_idx == frag_cnt)
2214 /* map next fragment for DMA */
2215 idx = (count + tx->req) & tx->mask;
2216 frag = &skb_shinfo(skb)->frags[frag_idx];
2219 bus = pci_map_page(mgp->pdev, frag->page, frag->page_offset,
2220 len, PCI_DMA_TODEVICE);
2221 pci_unmap_addr_set(&tx->info[idx], bus, bus);
2222 pci_unmap_len_set(&tx->info[idx], len, len);
2225 (req - rdma_count)->rdma_count = rdma_count;
2229 req->flags |= MXGEFW_FLAGS_TSO_LAST;
2230 } while (!(req->flags & (MXGEFW_FLAGS_TSO_CHOP |
2231 MXGEFW_FLAGS_FIRST)));
2232 idx = ((count - 1) + tx->req) & tx->mask;
2233 tx->info[idx].last = 1;
2234 if (tx->wc_fifo == NULL)
2235 myri10ge_submit_req(tx, tx->req_list, count);
2237 myri10ge_submit_req_wc(tx, tx->req_list, count);
2239 if ((avail - count) < MXGEFW_MAX_SEND_DESC) {
2241 netif_stop_queue(dev);
2243 dev->trans_start = jiffies;
2247 /* Free any DMA resources we've alloced and clear out the skb
2248 * slot so as to not trip up assertions, and to avoid a
2249 * double-free if linearizing fails */
2251 last_idx = (idx + 1) & tx->mask;
2252 idx = tx->req & tx->mask;
2253 tx->info[idx].skb = NULL;
2255 len = pci_unmap_len(&tx->info[idx], len);
2257 if (tx->info[idx].skb != NULL)
2258 pci_unmap_single(mgp->pdev,
2259 pci_unmap_addr(&tx->info[idx],
2263 pci_unmap_page(mgp->pdev,
2264 pci_unmap_addr(&tx->info[idx],
2267 pci_unmap_len_set(&tx->info[idx], len, 0);
2268 tx->info[idx].skb = NULL;
2270 idx = (idx + 1) & tx->mask;
2271 } while (idx != last_idx);
2272 if (skb_is_gso(skb)) {
2274 "myri10ge: %s: TSO but wanted to linearize?!?!?\n",
2279 if (skb_linearize(skb))
2282 mgp->tx_linearized++;
2286 dev_kfree_skb_any(skb);
2287 mgp->stats.tx_dropped += 1;
2292 static struct net_device_stats *myri10ge_get_stats(struct net_device *dev)
2294 struct myri10ge_priv *mgp = netdev_priv(dev);
2298 static void myri10ge_set_multicast_list(struct net_device *dev)
2300 struct myri10ge_cmd cmd;
2301 struct myri10ge_priv *mgp;
2302 struct dev_mc_list *mc_list;
2303 __be32 data[2] = { 0, 0 };
2306 mgp = netdev_priv(dev);
2307 /* can be called from atomic contexts,
2308 * pass 1 to force atomicity in myri10ge_send_cmd() */
2309 myri10ge_change_promisc(mgp, dev->flags & IFF_PROMISC, 1);
2311 /* This firmware is known to not support multicast */
2312 if (!mgp->fw_multicast_support)
2315 /* Disable multicast filtering */
2317 err = myri10ge_send_cmd(mgp, MXGEFW_ENABLE_ALLMULTI, &cmd, 1);
2319 printk(KERN_ERR "myri10ge: %s: Failed MXGEFW_ENABLE_ALLMULTI,"
2320 " error status: %d\n", dev->name, err);
2324 if ((dev->flags & IFF_ALLMULTI) || mgp->adopted_rx_filter_bug) {
2325 /* request to disable multicast filtering, so quit here */
2329 /* Flush the filters */
2331 err = myri10ge_send_cmd(mgp, MXGEFW_LEAVE_ALL_MULTICAST_GROUPS,
2335 "myri10ge: %s: Failed MXGEFW_LEAVE_ALL_MULTICAST_GROUPS"
2336 ", error status: %d\n", dev->name, err);
2340 /* Walk the multicast list, and add each address */
2341 for (mc_list = dev->mc_list; mc_list != NULL; mc_list = mc_list->next) {
2342 memcpy(data, &mc_list->dmi_addr, 6);
2343 cmd.data0 = ntohl(data[0]);
2344 cmd.data1 = ntohl(data[1]);
2345 err = myri10ge_send_cmd(mgp, MXGEFW_JOIN_MULTICAST_GROUP,
2349 printk(KERN_ERR "myri10ge: %s: Failed "
2350 "MXGEFW_JOIN_MULTICAST_GROUP, error status:"
2351 "%d\t", dev->name, err);
2352 printk(KERN_ERR "MAC %02x:%02x:%02x:%02x:%02x:%02x\n",
2353 ((unsigned char *)&mc_list->dmi_addr)[0],
2354 ((unsigned char *)&mc_list->dmi_addr)[1],
2355 ((unsigned char *)&mc_list->dmi_addr)[2],
2356 ((unsigned char *)&mc_list->dmi_addr)[3],
2357 ((unsigned char *)&mc_list->dmi_addr)[4],
2358 ((unsigned char *)&mc_list->dmi_addr)[5]
2363 /* Enable multicast filtering */
2364 err = myri10ge_send_cmd(mgp, MXGEFW_DISABLE_ALLMULTI, &cmd, 1);
2366 printk(KERN_ERR "myri10ge: %s: Failed MXGEFW_DISABLE_ALLMULTI,"
2367 "error status: %d\n", dev->name, err);
2377 static int myri10ge_set_mac_address(struct net_device *dev, void *addr)
2379 struct sockaddr *sa = addr;
2380 struct myri10ge_priv *mgp = netdev_priv(dev);
2383 if (!is_valid_ether_addr(sa->sa_data))
2384 return -EADDRNOTAVAIL;
2386 status = myri10ge_update_mac_address(mgp, sa->sa_data);
2389 "myri10ge: %s: changing mac address failed with %d\n",
2394 /* change the dev structure */
2395 memcpy(dev->dev_addr, sa->sa_data, 6);
2399 static int myri10ge_change_mtu(struct net_device *dev, int new_mtu)
2401 struct myri10ge_priv *mgp = netdev_priv(dev);
2404 if ((new_mtu < 68) || (ETH_HLEN + new_mtu > MYRI10GE_MAX_ETHER_MTU)) {
2405 printk(KERN_ERR "myri10ge: %s: new mtu (%d) is not valid\n",
2406 dev->name, new_mtu);
2409 printk(KERN_INFO "%s: changing mtu from %d to %d\n",
2410 dev->name, dev->mtu, new_mtu);
2412 /* if we change the mtu on an active device, we must
2413 * reset the device so the firmware sees the change */
2414 myri10ge_close(dev);
2424 * Enable ECRC to align PCI-E Completion packets on an 8-byte boundary.
2425 * Only do it if the bridge is a root port since we don't want to disturb
2426 * any other device, except if forced with myri10ge_ecrc_enable > 1.
2429 static void myri10ge_enable_ecrc(struct myri10ge_priv *mgp)
2431 struct pci_dev *bridge = mgp->pdev->bus->self;
2432 struct device *dev = &mgp->pdev->dev;
2439 if (!myri10ge_ecrc_enable || !bridge)
2442 /* check that the bridge is a root port */
2443 cap = pci_find_capability(bridge, PCI_CAP_ID_EXP);
2444 pci_read_config_word(bridge, cap + PCI_CAP_FLAGS, &val);
2445 ext_type = (val & PCI_EXP_FLAGS_TYPE) >> 4;
2446 if (ext_type != PCI_EXP_TYPE_ROOT_PORT) {
2447 if (myri10ge_ecrc_enable > 1) {
2448 struct pci_dev *old_bridge = bridge;
2450 /* Walk the hierarchy up to the root port
2451 * where ECRC has to be enabled */
2453 bridge = bridge->bus->self;
2456 "Failed to find root port"
2457 " to force ECRC\n");
2461 pci_find_capability(bridge, PCI_CAP_ID_EXP);
2462 pci_read_config_word(bridge,
2463 cap + PCI_CAP_FLAGS, &val);
2464 ext_type = (val & PCI_EXP_FLAGS_TYPE) >> 4;
2465 } while (ext_type != PCI_EXP_TYPE_ROOT_PORT);
2468 "Forcing ECRC on non-root port %s"
2469 " (enabling on root port %s)\n",
2470 pci_name(old_bridge), pci_name(bridge));
2473 "Not enabling ECRC on non-root port %s\n",
2479 cap = pci_find_ext_capability(bridge, PCI_EXT_CAP_ID_ERR);
2483 ret = pci_read_config_dword(bridge, cap + PCI_ERR_CAP, &err_cap);
2485 dev_err(dev, "failed reading ext-conf-space of %s\n",
2487 dev_err(dev, "\t pci=nommconf in use? "
2488 "or buggy/incomplete/absent ACPI MCFG attr?\n");
2491 if (!(err_cap & PCI_ERR_CAP_ECRC_GENC))
2494 err_cap |= PCI_ERR_CAP_ECRC_GENE;
2495 pci_write_config_dword(bridge, cap + PCI_ERR_CAP, err_cap);
2496 dev_info(dev, "Enabled ECRC on upstream bridge %s\n", pci_name(bridge));
2500 * The Lanai Z8E PCI-E interface achieves higher Read-DMA throughput
2501 * when the PCI-E Completion packets are aligned on an 8-byte
2502 * boundary. Some PCI-E chip sets always align Completion packets; on
2503 * the ones that do not, the alignment can be enforced by enabling
2504 * ECRC generation (if supported).
2506 * When PCI-E Completion packets are not aligned, it is actually more
2507 * efficient to limit Read-DMA transactions to 2KB, rather than 4KB.
2509 * If the driver can neither enable ECRC nor verify that it has
2510 * already been enabled, then it must use a firmware image which works
2511 * around unaligned completion packets (myri10ge_ethp_z8e.dat), and it
2512 * should also ensure that it never gives the device a Read-DMA which is
2513 * larger than 2KB by setting the tx.boundary to 2KB. If ECRC is
2514 * enabled, then the driver should use the aligned (myri10ge_eth_z8e.dat)
2515 * firmware image, and set tx.boundary to 4KB.
2518 static void myri10ge_firmware_probe(struct myri10ge_priv *mgp)
2520 struct pci_dev *pdev = mgp->pdev;
2521 struct device *dev = &pdev->dev;
2525 mgp->tx.boundary = 4096;
2527 * Verify the max read request size was set to 4KB
2528 * before trying the test with 4KB.
2530 cap = pci_find_capability(pdev, PCI_CAP_ID_EXP);
2532 dev_err(dev, "Bad PCI_CAP_ID_EXP location %d\n", cap);
2535 status = pci_read_config_word(pdev, cap + PCI_EXP_DEVCTL, &val);
2537 dev_err(dev, "Couldn't read max read req size: %d\n", status);
2540 if ((val & (5 << 12)) != (5 << 12)) {
2541 dev_warn(dev, "Max Read Request size != 4096 (0x%x)\n", val);
2542 mgp->tx.boundary = 2048;
2545 * load the optimized firmware (which assumes aligned PCIe
2546 * completions) in order to see if it works on this host.
2548 mgp->fw_name = myri10ge_fw_aligned;
2549 status = myri10ge_load_firmware(mgp);
2555 * Enable ECRC if possible
2557 myri10ge_enable_ecrc(mgp);
2560 * Run a DMA test which watches for unaligned completions and
2561 * aborts on the first one seen.
2564 status = myri10ge_dma_test(mgp, MXGEFW_CMD_UNALIGNED_TEST);
2566 return; /* keep the aligned firmware */
2568 if (status != -E2BIG)
2569 dev_warn(dev, "DMA test failed: %d\n", status);
2570 if (status == -ENOSYS)
2571 dev_warn(dev, "Falling back to ethp! "
2572 "Please install up to date fw\n");
2574 /* fall back to using the unaligned firmware */
2575 mgp->tx.boundary = 2048;
2576 mgp->fw_name = myri10ge_fw_unaligned;
2580 static void myri10ge_select_firmware(struct myri10ge_priv *mgp)
2582 if (myri10ge_force_firmware == 0) {
2583 int link_width, exp_cap;
2586 exp_cap = pci_find_capability(mgp->pdev, PCI_CAP_ID_EXP);
2587 pci_read_config_word(mgp->pdev, exp_cap + PCI_EXP_LNKSTA, &lnk);
2588 link_width = (lnk >> 4) & 0x3f;
2590 /* Check to see if Link is less than 8 or if the
2591 * upstream bridge is known to provide aligned
2593 if (link_width < 8) {
2594 dev_info(&mgp->pdev->dev, "PCIE x%d Link\n",
2596 mgp->tx.boundary = 4096;
2597 mgp->fw_name = myri10ge_fw_aligned;
2599 myri10ge_firmware_probe(mgp);
2602 if (myri10ge_force_firmware == 1) {
2603 dev_info(&mgp->pdev->dev,
2604 "Assuming aligned completions (forced)\n");
2605 mgp->tx.boundary = 4096;
2606 mgp->fw_name = myri10ge_fw_aligned;
2608 dev_info(&mgp->pdev->dev,
2609 "Assuming unaligned completions (forced)\n");
2610 mgp->tx.boundary = 2048;
2611 mgp->fw_name = myri10ge_fw_unaligned;
2614 if (myri10ge_fw_name != NULL) {
2615 dev_info(&mgp->pdev->dev, "overriding firmware to %s\n",
2617 mgp->fw_name = myri10ge_fw_name;
2623 static int myri10ge_suspend(struct pci_dev *pdev, pm_message_t state)
2625 struct myri10ge_priv *mgp;
2626 struct net_device *netdev;
2628 mgp = pci_get_drvdata(pdev);
2633 netif_device_detach(netdev);
2634 if (netif_running(netdev)) {
2635 printk(KERN_INFO "myri10ge: closing %s\n", netdev->name);
2637 myri10ge_close(netdev);
2640 myri10ge_dummy_rdma(mgp, 0);
2641 pci_save_state(pdev);
2642 pci_disable_device(pdev);
2644 return pci_set_power_state(pdev, pci_choose_state(pdev, state));
2647 static int myri10ge_resume(struct pci_dev *pdev)
2649 struct myri10ge_priv *mgp;
2650 struct net_device *netdev;
2654 mgp = pci_get_drvdata(pdev);
2658 pci_set_power_state(pdev, 0); /* zeros conf space as a side effect */
2659 msleep(5); /* give card time to respond */
2660 pci_read_config_word(mgp->pdev, PCI_VENDOR_ID, &vendor);
2661 if (vendor == 0xffff) {
2662 printk(KERN_ERR "myri10ge: %s: device disappeared!\n",
2667 status = pci_restore_state(pdev);
2671 status = pci_enable_device(pdev);
2673 dev_err(&pdev->dev, "failed to enable device\n");
2677 pci_set_master(pdev);
2679 myri10ge_reset(mgp);
2680 myri10ge_dummy_rdma(mgp, 1);
2682 /* Save configuration space to be restored if the
2683 * nic resets due to a parity error */
2684 pci_save_state(pdev);
2686 if (netif_running(netdev)) {
2688 status = myri10ge_open(netdev);
2691 goto abort_with_enabled;
2694 netif_device_attach(netdev);
2699 pci_disable_device(pdev);
2704 #endif /* CONFIG_PM */
2706 static u32 myri10ge_read_reboot(struct myri10ge_priv *mgp)
2708 struct pci_dev *pdev = mgp->pdev;
2709 int vs = mgp->vendor_specific_offset;
2712 /*enter read32 mode */
2713 pci_write_config_byte(pdev, vs + 0x10, 0x3);
2715 /*read REBOOT_STATUS (0xfffffff0) */
2716 pci_write_config_dword(pdev, vs + 0x18, 0xfffffff0);
2717 pci_read_config_dword(pdev, vs + 0x14, &reboot);
2722 * This watchdog is used to check whether the board has suffered
2723 * from a parity error and needs to be recovered.
2725 static void myri10ge_watchdog(struct work_struct *work)
2727 struct myri10ge_priv *mgp =
2728 container_of(work, struct myri10ge_priv, watchdog_work);
2733 mgp->watchdog_resets++;
2734 pci_read_config_word(mgp->pdev, PCI_COMMAND, &cmd);
2735 if ((cmd & PCI_COMMAND_MASTER) == 0) {
2736 /* Bus master DMA disabled? Check to see
2737 * if the card rebooted due to a parity error
2738 * For now, just report it */
2739 reboot = myri10ge_read_reboot(mgp);
2741 "myri10ge: %s: NIC rebooted (0x%x),%s resetting\n",
2742 mgp->dev->name, reboot,
2743 myri10ge_reset_recover ? " " : " not");
2744 if (myri10ge_reset_recover == 0)
2747 myri10ge_reset_recover--;
2750 * A rebooted nic will come back with config space as
2751 * it was after power was applied to PCIe bus.
2752 * Attempt to restore config space which was saved
2753 * when the driver was loaded, or the last time the
2754 * nic was resumed from power saving mode.
2756 pci_restore_state(mgp->pdev);
2758 /* save state again for accounting reasons */
2759 pci_save_state(mgp->pdev);
2762 /* if we get back -1's from our slot, perhaps somebody
2763 * powered off our card. Don't try to reset it in
2765 if (cmd == 0xffff) {
2766 pci_read_config_word(mgp->pdev, PCI_VENDOR_ID, &vendor);
2767 if (vendor == 0xffff) {
2769 "myri10ge: %s: device disappeared!\n",
2774 /* Perhaps it is a software error. Try to reset */
2776 printk(KERN_ERR "myri10ge: %s: device timeout, resetting\n",
2778 printk(KERN_INFO "myri10ge: %s: %d %d %d %d %d\n",
2779 mgp->dev->name, mgp->tx.req, mgp->tx.done,
2780 mgp->tx.pkt_start, mgp->tx.pkt_done,
2781 (int)ntohl(mgp->fw_stats->send_done_count));
2783 printk(KERN_INFO "myri10ge: %s: %d %d %d %d %d\n",
2784 mgp->dev->name, mgp->tx.req, mgp->tx.done,
2785 mgp->tx.pkt_start, mgp->tx.pkt_done,
2786 (int)ntohl(mgp->fw_stats->send_done_count));
2789 myri10ge_close(mgp->dev);
2790 status = myri10ge_load_firmware(mgp);
2792 printk(KERN_ERR "myri10ge: %s: failed to load firmware\n",
2795 myri10ge_open(mgp->dev);
2800 * We use our own timer routine rather than relying upon
2801 * netdev->tx_timeout because we have a very large hardware transmit
2802 * queue. Due to the large queue, the netdev->tx_timeout function
2803 * cannot detect a NIC with a parity error in a timely fashion if the
2804 * NIC is lightly loaded.
2806 static void myri10ge_watchdog_timer(unsigned long arg)
2808 struct myri10ge_priv *mgp;
2810 mgp = (struct myri10ge_priv *)arg;
2812 if (mgp->rx_small.watchdog_needed) {
2813 myri10ge_alloc_rx_pages(mgp, &mgp->rx_small,
2814 mgp->small_bytes + MXGEFW_PAD, 1);
2815 if (mgp->rx_small.fill_cnt - mgp->rx_small.cnt >=
2816 myri10ge_fill_thresh)
2817 mgp->rx_small.watchdog_needed = 0;
2819 if (mgp->rx_big.watchdog_needed) {
2820 myri10ge_alloc_rx_pages(mgp, &mgp->rx_big, mgp->big_bytes, 1);
2821 if (mgp->rx_big.fill_cnt - mgp->rx_big.cnt >=
2822 myri10ge_fill_thresh)
2823 mgp->rx_big.watchdog_needed = 0;
2826 if (mgp->tx.req != mgp->tx.done &&
2827 mgp->tx.done == mgp->watchdog_tx_done &&
2828 mgp->watchdog_tx_req != mgp->watchdog_tx_done)
2829 /* nic seems like it might be stuck.. */
2830 schedule_work(&mgp->watchdog_work);
2833 mod_timer(&mgp->watchdog_timer,
2834 jiffies + myri10ge_watchdog_timeout * HZ);
2836 mgp->watchdog_tx_done = mgp->tx.done;
2837 mgp->watchdog_tx_req = mgp->tx.req;
2840 static int myri10ge_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2842 struct net_device *netdev;
2843 struct myri10ge_priv *mgp;
2844 struct device *dev = &pdev->dev;
2847 int status = -ENXIO;
2852 netdev = alloc_etherdev(sizeof(*mgp));
2853 if (netdev == NULL) {
2854 dev_err(dev, "Could not allocate ethernet device\n");
2858 SET_NETDEV_DEV(netdev, &pdev->dev);
2860 mgp = netdev_priv(netdev);
2861 memset(mgp, 0, sizeof(*mgp));
2864 mgp->csum_flag = MXGEFW_FLAGS_CKSUM;
2865 mgp->pause = myri10ge_flow_control;
2866 mgp->intr_coal_delay = myri10ge_intr_coal_delay;
2867 mgp->msg_enable = netif_msg_init(myri10ge_debug, MYRI10GE_MSG_DEFAULT);
2868 init_waitqueue_head(&mgp->down_wq);
2870 if (pci_enable_device(pdev)) {
2871 dev_err(&pdev->dev, "pci_enable_device call failed\n");
2873 goto abort_with_netdev;
2876 /* Find the vendor-specific cap so we can check
2877 * the reboot register later on */
2878 mgp->vendor_specific_offset
2879 = pci_find_capability(pdev, PCI_CAP_ID_VNDR);
2881 /* Set our max read request to 4KB */
2882 cap = pci_find_capability(pdev, PCI_CAP_ID_EXP);
2884 dev_err(&pdev->dev, "Bad PCI_CAP_ID_EXP location %d\n", cap);
2885 goto abort_with_netdev;
2887 status = pci_read_config_word(pdev, cap + PCI_EXP_DEVCTL, &val);
2889 dev_err(&pdev->dev, "Error %d reading PCI_EXP_DEVCTL\n",
2891 goto abort_with_netdev;
2893 val = (val & ~PCI_EXP_DEVCTL_READRQ) | (5 << 12);
2894 status = pci_write_config_word(pdev, cap + PCI_EXP_DEVCTL, val);
2896 dev_err(&pdev->dev, "Error %d writing PCI_EXP_DEVCTL\n",
2898 goto abort_with_netdev;
2901 pci_set_master(pdev);
2903 status = pci_set_dma_mask(pdev, DMA_64BIT_MASK);
2907 "64-bit pci address mask was refused, trying 32-bit");
2908 status = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
2911 dev_err(&pdev->dev, "Error %d setting DMA mask\n", status);
2912 goto abort_with_netdev;
2914 mgp->cmd = dma_alloc_coherent(&pdev->dev, sizeof(*mgp->cmd),
2915 &mgp->cmd_bus, GFP_KERNEL);
2916 if (mgp->cmd == NULL)
2917 goto abort_with_netdev;
2919 mgp->fw_stats = dma_alloc_coherent(&pdev->dev, sizeof(*mgp->fw_stats),
2920 &mgp->fw_stats_bus, GFP_KERNEL);
2921 if (mgp->fw_stats == NULL)
2922 goto abort_with_cmd;
2924 mgp->board_span = pci_resource_len(pdev, 0);
2925 mgp->iomem_base = pci_resource_start(pdev, 0);
2927 mgp->wc_enabled = 0;
2929 mgp->mtrr = mtrr_add(mgp->iomem_base, mgp->board_span,
2930 MTRR_TYPE_WRCOMB, 1);
2932 mgp->wc_enabled = 1;
2934 /* Hack. need to get rid of these magic numbers */
2936 2 * 1024 * 1024 - (2 * (48 * 1024) + (32 * 1024)) - 0x100;
2937 if (mgp->sram_size > mgp->board_span) {
2938 dev_err(&pdev->dev, "board span %ld bytes too small\n",
2942 mgp->sram = ioremap(mgp->iomem_base, mgp->board_span);
2943 if (mgp->sram == NULL) {
2944 dev_err(&pdev->dev, "ioremap failed for %ld bytes at 0x%lx\n",
2945 mgp->board_span, mgp->iomem_base);
2949 memcpy_fromio(mgp->eeprom_strings,
2950 mgp->sram + mgp->sram_size - MYRI10GE_EEPROM_STRINGS_SIZE,
2951 MYRI10GE_EEPROM_STRINGS_SIZE);
2952 memset(mgp->eeprom_strings + MYRI10GE_EEPROM_STRINGS_SIZE - 2, 0, 2);
2953 status = myri10ge_read_mac_addr(mgp);
2955 goto abort_with_ioremap;
2957 for (i = 0; i < ETH_ALEN; i++)
2958 netdev->dev_addr[i] = mgp->mac_addr[i];
2960 /* allocate rx done ring */
2961 bytes = myri10ge_max_intr_slots * sizeof(*mgp->rx_done.entry);
2962 mgp->rx_done.entry = dma_alloc_coherent(&pdev->dev, bytes,
2963 &mgp->rx_done.bus, GFP_KERNEL);
2964 if (mgp->rx_done.entry == NULL)
2965 goto abort_with_ioremap;
2966 memset(mgp->rx_done.entry, 0, bytes);
2968 myri10ge_select_firmware(mgp);
2970 status = myri10ge_load_firmware(mgp);
2972 dev_err(&pdev->dev, "failed to load firmware\n");
2973 goto abort_with_rx_done;
2976 status = myri10ge_reset(mgp);
2978 dev_err(&pdev->dev, "failed reset\n");
2979 goto abort_with_firmware;
2982 pci_set_drvdata(pdev, mgp);
2983 if ((myri10ge_initial_mtu + ETH_HLEN) > MYRI10GE_MAX_ETHER_MTU)
2984 myri10ge_initial_mtu = MYRI10GE_MAX_ETHER_MTU - ETH_HLEN;
2985 if ((myri10ge_initial_mtu + ETH_HLEN) < 68)
2986 myri10ge_initial_mtu = 68;
2987 netdev->mtu = myri10ge_initial_mtu;
2988 netdev->open = myri10ge_open;
2989 netdev->stop = myri10ge_close;
2990 netdev->hard_start_xmit = myri10ge_xmit;
2991 netdev->get_stats = myri10ge_get_stats;
2992 netdev->base_addr = mgp->iomem_base;
2993 netdev->change_mtu = myri10ge_change_mtu;
2994 netdev->set_multicast_list = myri10ge_set_multicast_list;
2995 netdev->set_mac_address = myri10ge_set_mac_address;
2996 netdev->features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_TSO;
2998 netdev->features |= NETIF_F_HIGHDMA;
2999 netdev->poll = myri10ge_poll;
3000 netdev->weight = myri10ge_napi_weight;
3002 /* make sure we can get an irq, and that MSI can be
3003 * setup (if available). Also ensure netdev->irq
3004 * is set to correct value if MSI is enabled */
3005 status = myri10ge_request_irq(mgp);
3007 goto abort_with_firmware;
3008 netdev->irq = pdev->irq;
3009 myri10ge_free_irq(mgp);
3011 /* Save configuration space to be restored if the
3012 * nic resets due to a parity error */
3013 pci_save_state(pdev);
3015 /* Setup the watchdog timer */
3016 setup_timer(&mgp->watchdog_timer, myri10ge_watchdog_timer,
3017 (unsigned long)mgp);
3019 SET_ETHTOOL_OPS(netdev, &myri10ge_ethtool_ops);
3020 INIT_WORK(&mgp->watchdog_work, myri10ge_watchdog);
3021 status = register_netdev(netdev);
3023 dev_err(&pdev->dev, "register_netdev failed: %d\n", status);
3024 goto abort_with_state;
3026 dev_info(dev, "%s IRQ %d, tx bndry %d, fw %s, WC %s\n",
3027 (mgp->msi_enabled ? "MSI" : "xPIC"),
3028 netdev->irq, mgp->tx.boundary, mgp->fw_name,
3029 (mgp->wc_enabled ? "Enabled" : "Disabled"));
3034 pci_restore_state(pdev);
3036 abort_with_firmware:
3037 myri10ge_dummy_rdma(mgp, 0);
3040 bytes = myri10ge_max_intr_slots * sizeof(*mgp->rx_done.entry);
3041 dma_free_coherent(&pdev->dev, bytes,
3042 mgp->rx_done.entry, mgp->rx_done.bus);
3050 mtrr_del(mgp->mtrr, mgp->iomem_base, mgp->board_span);
3052 dma_free_coherent(&pdev->dev, sizeof(*mgp->fw_stats),
3053 mgp->fw_stats, mgp->fw_stats_bus);
3056 dma_free_coherent(&pdev->dev, sizeof(*mgp->cmd),
3057 mgp->cmd, mgp->cmd_bus);
3061 free_netdev(netdev);
3068 * Does what is necessary to shutdown one Myrinet device. Called
3069 * once for each Myrinet card by the kernel when a module is
3072 static void myri10ge_remove(struct pci_dev *pdev)
3074 struct myri10ge_priv *mgp;
3075 struct net_device *netdev;
3078 mgp = pci_get_drvdata(pdev);
3082 flush_scheduled_work();
3084 unregister_netdev(netdev);
3086 myri10ge_dummy_rdma(mgp, 0);
3088 /* avoid a memory leak */
3089 pci_restore_state(pdev);
3091 bytes = myri10ge_max_intr_slots * sizeof(*mgp->rx_done.entry);
3092 dma_free_coherent(&pdev->dev, bytes,
3093 mgp->rx_done.entry, mgp->rx_done.bus);
3099 mtrr_del(mgp->mtrr, mgp->iomem_base, mgp->board_span);
3101 dma_free_coherent(&pdev->dev, sizeof(*mgp->fw_stats),
3102 mgp->fw_stats, mgp->fw_stats_bus);
3104 dma_free_coherent(&pdev->dev, sizeof(*mgp->cmd),
3105 mgp->cmd, mgp->cmd_bus);
3107 free_netdev(netdev);
3108 pci_set_drvdata(pdev, NULL);
3111 #define PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E 0x0008
3113 static struct pci_device_id myri10ge_pci_tbl[] = {
3114 {PCI_DEVICE(PCI_VENDOR_ID_MYRICOM, PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E)},
3118 static struct pci_driver myri10ge_driver = {
3120 .probe = myri10ge_probe,
3121 .remove = myri10ge_remove,
3122 .id_table = myri10ge_pci_tbl,
3124 .suspend = myri10ge_suspend,
3125 .resume = myri10ge_resume,
3129 static __init int myri10ge_init_module(void)
3131 printk(KERN_INFO "%s: Version %s\n", myri10ge_driver.name,
3132 MYRI10GE_VERSION_STR);
3133 return pci_register_driver(&myri10ge_driver);
3136 module_init(myri10ge_init_module);
3138 static __exit void myri10ge_cleanup_module(void)
3140 pci_unregister_driver(&myri10ge_driver);
3143 module_exit(myri10ge_cleanup_module);