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 <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 "1.3.0-1.233"
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 htonl(0xffffffff)
93 #define MYRI10GE_NO_RESPONSE_RESULT 0xffffffff
95 #define MYRI10GE_ALLOC_ORDER 0
96 #define MYRI10GE_ALLOC_SIZE ((1 << MYRI10GE_ALLOC_ORDER) * PAGE_SIZE)
97 #define MYRI10GE_MAX_FRAGS_PER_FRAME (MYRI10GE_MAX_ETHER_MTU/MYRI10GE_ALLOC_SIZE + 1)
99 struct myri10ge_rx_buffer_state {
102 DECLARE_PCI_UNMAP_ADDR(bus)
103 DECLARE_PCI_UNMAP_LEN(len)
106 struct myri10ge_tx_buffer_state {
109 DECLARE_PCI_UNMAP_ADDR(bus)
110 DECLARE_PCI_UNMAP_LEN(len)
113 struct myri10ge_cmd {
119 struct myri10ge_rx_buf {
120 struct mcp_kreq_ether_recv __iomem *lanai; /* lanai ptr for recv ring */
121 u8 __iomem *wc_fifo; /* w/c rx dma addr fifo address */
122 struct mcp_kreq_ether_recv *shadow; /* host shadow of recv ring */
123 struct myri10ge_rx_buffer_state *info;
130 int mask; /* number of rx slots -1 */
134 struct myri10ge_tx_buf {
135 struct mcp_kreq_ether_send __iomem *lanai; /* lanai ptr for sendq */
136 u8 __iomem *wc_fifo; /* w/c send fifo address */
137 struct mcp_kreq_ether_send *req_list; /* host shadow of sendq */
139 struct myri10ge_tx_buffer_state *info;
140 int mask; /* number of transmit slots -1 */
141 int boundary; /* boundary transmits cannot cross */
142 int req ____cacheline_aligned; /* transmit slots submitted */
143 int pkt_start; /* packets started */
144 int done ____cacheline_aligned; /* transmit slots completed */
145 int pkt_done; /* packets completed */
148 struct myri10ge_rx_done {
149 struct mcp_slot *entry;
155 struct myri10ge_priv {
156 int running; /* running? */
157 int csum_flag; /* rx_csums? */
158 struct myri10ge_tx_buf tx; /* transmit ring */
159 struct myri10ge_rx_buf rx_small;
160 struct myri10ge_rx_buf rx_big;
161 struct myri10ge_rx_done rx_done;
164 struct net_device *dev;
165 struct net_device_stats stats;
168 unsigned long board_span;
169 unsigned long iomem_base;
170 __be32 __iomem *irq_claim;
171 __be32 __iomem *irq_deassert;
172 char *mac_addr_string;
173 struct mcp_cmd_response *cmd;
175 struct mcp_irq_data *fw_stats;
176 dma_addr_t fw_stats_bus;
177 struct pci_dev *pdev;
180 unsigned int rdma_tags_available;
182 __be32 __iomem *intr_coal_delay_ptr;
188 wait_queue_head_t down_wq;
189 struct work_struct watchdog_work;
190 struct timer_list watchdog_timer;
191 int watchdog_tx_done;
197 char eeprom_strings[MYRI10GE_EEPROM_STRINGS_SIZE];
198 char fw_version[128];
202 int adopted_rx_filter_bug;
203 u8 mac_addr[6]; /* eeprom mac address */
204 unsigned long serial_number;
205 int vendor_specific_offset;
206 int fw_multicast_support;
214 static char *myri10ge_fw_unaligned = "myri10ge_ethp_z8e.dat";
215 static char *myri10ge_fw_aligned = "myri10ge_eth_z8e.dat";
217 static char *myri10ge_fw_name = NULL;
218 module_param(myri10ge_fw_name, charp, S_IRUGO | S_IWUSR);
219 MODULE_PARM_DESC(myri10ge_fw_name, "Firmware image name\n");
221 static int myri10ge_ecrc_enable = 1;
222 module_param(myri10ge_ecrc_enable, int, S_IRUGO);
223 MODULE_PARM_DESC(myri10ge_ecrc_enable, "Enable Extended CRC on PCI-E\n");
225 static int myri10ge_max_intr_slots = 1024;
226 module_param(myri10ge_max_intr_slots, int, S_IRUGO);
227 MODULE_PARM_DESC(myri10ge_max_intr_slots, "Interrupt queue slots\n");
229 static int myri10ge_small_bytes = -1; /* -1 == auto */
230 module_param(myri10ge_small_bytes, int, S_IRUGO | S_IWUSR);
231 MODULE_PARM_DESC(myri10ge_small_bytes, "Threshold of small packets\n");
233 static int myri10ge_msi = 1; /* enable msi by default */
234 module_param(myri10ge_msi, int, S_IRUGO | S_IWUSR);
235 MODULE_PARM_DESC(myri10ge_msi, "Enable Message Signalled Interrupts\n");
237 static int myri10ge_intr_coal_delay = 75;
238 module_param(myri10ge_intr_coal_delay, int, S_IRUGO);
239 MODULE_PARM_DESC(myri10ge_intr_coal_delay, "Interrupt coalescing delay\n");
241 static int myri10ge_flow_control = 1;
242 module_param(myri10ge_flow_control, int, S_IRUGO);
243 MODULE_PARM_DESC(myri10ge_flow_control, "Pause parameter\n");
245 static int myri10ge_deassert_wait = 1;
246 module_param(myri10ge_deassert_wait, int, S_IRUGO | S_IWUSR);
247 MODULE_PARM_DESC(myri10ge_deassert_wait,
248 "Wait when deasserting legacy interrupts\n");
250 static int myri10ge_force_firmware = 0;
251 module_param(myri10ge_force_firmware, int, S_IRUGO);
252 MODULE_PARM_DESC(myri10ge_force_firmware,
253 "Force firmware to assume aligned completions\n");
255 static int myri10ge_initial_mtu = MYRI10GE_MAX_ETHER_MTU - ETH_HLEN;
256 module_param(myri10ge_initial_mtu, int, S_IRUGO);
257 MODULE_PARM_DESC(myri10ge_initial_mtu, "Initial MTU\n");
259 static int myri10ge_napi_weight = 64;
260 module_param(myri10ge_napi_weight, int, S_IRUGO);
261 MODULE_PARM_DESC(myri10ge_napi_weight, "Set NAPI weight\n");
263 static int myri10ge_watchdog_timeout = 1;
264 module_param(myri10ge_watchdog_timeout, int, S_IRUGO);
265 MODULE_PARM_DESC(myri10ge_watchdog_timeout, "Set watchdog timeout\n");
267 static int myri10ge_max_irq_loops = 1048576;
268 module_param(myri10ge_max_irq_loops, int, S_IRUGO);
269 MODULE_PARM_DESC(myri10ge_max_irq_loops,
270 "Set stuck legacy IRQ detection threshold\n");
272 #define MYRI10GE_MSG_DEFAULT NETIF_MSG_LINK
274 static int myri10ge_debug = -1; /* defaults above */
275 module_param(myri10ge_debug, int, 0);
276 MODULE_PARM_DESC(myri10ge_debug, "Debug level (0=none,...,16=all)");
278 static int myri10ge_fill_thresh = 256;
279 module_param(myri10ge_fill_thresh, int, S_IRUGO | S_IWUSR);
280 MODULE_PARM_DESC(myri10ge_fill_thresh, "Number of empty rx slots allowed\n");
282 static int myri10ge_wcfifo = 0;
283 module_param(myri10ge_wcfifo, int, S_IRUGO);
284 MODULE_PARM_DESC(myri10ge_wcfifo, "Enable WC Fifo when WC is enabled\n");
286 #define MYRI10GE_FW_OFFSET 1024*1024
287 #define MYRI10GE_HIGHPART_TO_U32(X) \
288 (sizeof (X) == 8) ? ((u32)((u64)(X) >> 32)) : (0)
289 #define MYRI10GE_LOWPART_TO_U32(X) ((u32)(X))
291 #define myri10ge_pio_copy(to,from,size) __iowrite64_copy(to,from,size/8)
293 static void myri10ge_set_multicast_list(struct net_device *dev);
295 static inline void put_be32(__be32 val, __be32 __iomem * p)
297 __raw_writel((__force __u32) val, (__force void __iomem *)p);
301 myri10ge_send_cmd(struct myri10ge_priv *mgp, u32 cmd,
302 struct myri10ge_cmd *data, int atomic)
305 char buf_bytes[sizeof(*buf) + 8];
306 struct mcp_cmd_response *response = mgp->cmd;
307 char __iomem *cmd_addr = mgp->sram + MXGEFW_ETH_CMD;
308 u32 dma_low, dma_high, result, value;
311 /* ensure buf is aligned to 8 bytes */
312 buf = (struct mcp_cmd *)ALIGN((unsigned long)buf_bytes, 8);
314 buf->data0 = htonl(data->data0);
315 buf->data1 = htonl(data->data1);
316 buf->data2 = htonl(data->data2);
317 buf->cmd = htonl(cmd);
318 dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
319 dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
321 buf->response_addr.low = htonl(dma_low);
322 buf->response_addr.high = htonl(dma_high);
323 response->result = htonl(MYRI10GE_NO_RESPONSE_RESULT);
325 myri10ge_pio_copy(cmd_addr, buf, sizeof(*buf));
327 /* wait up to 15ms. Longest command is the DMA benchmark,
328 * which is capped at 5ms, but runs from a timeout handler
329 * that runs every 7.8ms. So a 15ms timeout leaves us with
333 /* if atomic is set, do not sleep,
334 * and try to get the completion quickly
335 * (1ms will be enough for those commands) */
336 for (sleep_total = 0;
338 && response->result == htonl(MYRI10GE_NO_RESPONSE_RESULT);
342 /* use msleep for most command */
343 for (sleep_total = 0;
345 && response->result == htonl(MYRI10GE_NO_RESPONSE_RESULT);
350 result = ntohl(response->result);
351 value = ntohl(response->data);
352 if (result != MYRI10GE_NO_RESPONSE_RESULT) {
356 } else if (result == MXGEFW_CMD_UNKNOWN) {
358 } else if (result == MXGEFW_CMD_ERROR_UNALIGNED) {
361 dev_err(&mgp->pdev->dev,
362 "command %d failed, result = %d\n",
368 dev_err(&mgp->pdev->dev, "command %d timed out, result = %d\n",
374 * The eeprom strings on the lanaiX have the format
377 * PT:ddd mmm xx xx:xx:xx xx\0
378 * PV:ddd mmm xx xx:xx:xx xx\0
380 static int myri10ge_read_mac_addr(struct myri10ge_priv *mgp)
385 ptr = mgp->eeprom_strings;
386 limit = mgp->eeprom_strings + MYRI10GE_EEPROM_STRINGS_SIZE;
388 while (*ptr != '\0' && ptr < limit) {
389 if (memcmp(ptr, "MAC=", 4) == 0) {
391 mgp->mac_addr_string = ptr;
392 for (i = 0; i < 6; i++) {
393 if ((ptr + 2) > limit)
396 simple_strtoul(ptr, &ptr, 16);
400 if (memcmp((const void *)ptr, "SN=", 3) == 0) {
402 mgp->serial_number = simple_strtoul(ptr, &ptr, 10);
404 while (ptr < limit && *ptr++) ;
410 dev_err(&mgp->pdev->dev, "failed to parse eeprom_strings\n");
415 * Enable or disable periodic RDMAs from the host to make certain
416 * chipsets resend dropped PCIe messages
419 static void myri10ge_dummy_rdma(struct myri10ge_priv *mgp, int enable)
421 char __iomem *submit;
423 u32 dma_low, dma_high;
426 /* clear confirmation addr */
430 /* send a rdma command to the PCIe engine, and wait for the
431 * response in the confirmation address. The firmware should
432 * write a -1 there to indicate it is alive and well
434 dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
435 dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
437 buf[0] = htonl(dma_high); /* confirm addr MSW */
438 buf[1] = htonl(dma_low); /* confirm addr LSW */
439 buf[2] = MYRI10GE_NO_CONFIRM_DATA; /* confirm data */
440 buf[3] = htonl(dma_high); /* dummy addr MSW */
441 buf[4] = htonl(dma_low); /* dummy addr LSW */
442 buf[5] = htonl(enable); /* enable? */
444 submit = mgp->sram + MXGEFW_BOOT_DUMMY_RDMA;
446 myri10ge_pio_copy(submit, &buf, sizeof(buf));
447 for (i = 0; mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA && i < 20; i++)
449 if (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA)
450 dev_err(&mgp->pdev->dev, "dummy rdma %s failed\n",
451 (enable ? "enable" : "disable"));
455 myri10ge_validate_firmware(struct myri10ge_priv *mgp,
456 struct mcp_gen_header *hdr)
458 struct device *dev = &mgp->pdev->dev;
460 /* check firmware type */
461 if (ntohl(hdr->mcp_type) != MCP_TYPE_ETH) {
462 dev_err(dev, "Bad firmware type: 0x%x\n", ntohl(hdr->mcp_type));
466 /* save firmware version for ethtool */
467 strncpy(mgp->fw_version, hdr->version, sizeof(mgp->fw_version));
469 sscanf(mgp->fw_version, "%d.%d.%d", &mgp->fw_ver_major,
470 &mgp->fw_ver_minor, &mgp->fw_ver_tiny);
472 if (!(mgp->fw_ver_major == MXGEFW_VERSION_MAJOR
473 && mgp->fw_ver_minor == MXGEFW_VERSION_MINOR)) {
474 dev_err(dev, "Found firmware version %s\n", mgp->fw_version);
475 dev_err(dev, "Driver needs %d.%d\n", MXGEFW_VERSION_MAJOR,
476 MXGEFW_VERSION_MINOR);
482 static int myri10ge_load_hotplug_firmware(struct myri10ge_priv *mgp, u32 * size)
484 unsigned crc, reread_crc;
485 const struct firmware *fw;
486 struct device *dev = &mgp->pdev->dev;
487 struct mcp_gen_header *hdr;
492 if ((status = request_firmware(&fw, mgp->fw_name, dev)) < 0) {
493 dev_err(dev, "Unable to load %s firmware image via hotplug\n",
496 goto abort_with_nothing;
501 if (fw->size >= mgp->sram_size - MYRI10GE_FW_OFFSET ||
502 fw->size < MCP_HEADER_PTR_OFFSET + 4) {
503 dev_err(dev, "Firmware size invalid:%d\n", (int)fw->size);
509 hdr_offset = ntohl(*(__be32 *) (fw->data + MCP_HEADER_PTR_OFFSET));
510 if ((hdr_offset & 3) || hdr_offset + sizeof(*hdr) > fw->size) {
511 dev_err(dev, "Bad firmware file\n");
515 hdr = (void *)(fw->data + hdr_offset);
517 status = myri10ge_validate_firmware(mgp, hdr);
521 crc = crc32(~0, fw->data, fw->size);
522 for (i = 0; i < fw->size; i += 256) {
523 myri10ge_pio_copy(mgp->sram + MYRI10GE_FW_OFFSET + i,
525 min(256U, (unsigned)(fw->size - i)));
529 /* corruption checking is good for parity recovery and buggy chipset */
530 memcpy_fromio(fw->data, mgp->sram + MYRI10GE_FW_OFFSET, fw->size);
531 reread_crc = crc32(~0, fw->data, fw->size);
532 if (crc != reread_crc) {
533 dev_err(dev, "CRC failed(fw-len=%u), got 0x%x (expect 0x%x)\n",
534 (unsigned)fw->size, reread_crc, crc);
538 *size = (u32) fw->size;
541 release_firmware(fw);
547 static int myri10ge_adopt_running_firmware(struct myri10ge_priv *mgp)
549 struct mcp_gen_header *hdr;
550 struct device *dev = &mgp->pdev->dev;
551 const size_t bytes = sizeof(struct mcp_gen_header);
555 /* find running firmware header */
556 hdr_offset = ntohl(__raw_readl(mgp->sram + MCP_HEADER_PTR_OFFSET));
558 if ((hdr_offset & 3) || hdr_offset + sizeof(*hdr) > mgp->sram_size) {
559 dev_err(dev, "Running firmware has bad header offset (%d)\n",
564 /* copy header of running firmware from SRAM to host memory to
565 * validate firmware */
566 hdr = kmalloc(bytes, GFP_KERNEL);
568 dev_err(dev, "could not malloc firmware hdr\n");
571 memcpy_fromio(hdr, mgp->sram + hdr_offset, bytes);
572 status = myri10ge_validate_firmware(mgp, hdr);
575 /* check to see if adopted firmware has bug where adopting
576 * it will cause broadcasts to be filtered unless the NIC
577 * is kept in ALLMULTI mode */
578 if (mgp->fw_ver_major == 1 && mgp->fw_ver_minor == 4 &&
579 mgp->fw_ver_tiny >= 4 && mgp->fw_ver_tiny <= 11) {
580 mgp->adopted_rx_filter_bug = 1;
581 dev_warn(dev, "Adopting fw %d.%d.%d: "
582 "working around rx filter bug\n",
583 mgp->fw_ver_major, mgp->fw_ver_minor,
589 static int myri10ge_load_firmware(struct myri10ge_priv *mgp)
591 char __iomem *submit;
593 u32 dma_low, dma_high, size;
597 status = myri10ge_load_hotplug_firmware(mgp, &size);
599 dev_warn(&mgp->pdev->dev, "hotplug firmware loading failed\n");
601 /* Do not attempt to adopt firmware if there
606 status = myri10ge_adopt_running_firmware(mgp);
608 dev_err(&mgp->pdev->dev,
609 "failed to adopt running firmware\n");
612 dev_info(&mgp->pdev->dev,
613 "Successfully adopted running firmware\n");
614 if (mgp->tx.boundary == 4096) {
615 dev_warn(&mgp->pdev->dev,
616 "Using firmware currently running on NIC"
618 dev_warn(&mgp->pdev->dev,
619 "performance consider loading optimized "
621 dev_warn(&mgp->pdev->dev, "via hotplug\n");
624 mgp->fw_name = "adopted";
625 mgp->tx.boundary = 2048;
629 /* clear confirmation addr */
633 /* send a reload command to the bootstrap MCP, and wait for the
634 * response in the confirmation address. The firmware should
635 * write a -1 there to indicate it is alive and well
637 dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
638 dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
640 buf[0] = htonl(dma_high); /* confirm addr MSW */
641 buf[1] = htonl(dma_low); /* confirm addr LSW */
642 buf[2] = MYRI10GE_NO_CONFIRM_DATA; /* confirm data */
644 /* FIX: All newest firmware should un-protect the bottom of
645 * the sram before handoff. However, the very first interfaces
646 * do not. Therefore the handoff copy must skip the first 8 bytes
648 buf[3] = htonl(MYRI10GE_FW_OFFSET + 8); /* where the code starts */
649 buf[4] = htonl(size - 8); /* length of code */
650 buf[5] = htonl(8); /* where to copy to */
651 buf[6] = htonl(0); /* where to jump to */
653 submit = mgp->sram + MXGEFW_BOOT_HANDOFF;
655 myri10ge_pio_copy(submit, &buf, sizeof(buf));
660 while (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA && i < 20) {
664 if (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA) {
665 dev_err(&mgp->pdev->dev, "handoff failed\n");
668 dev_info(&mgp->pdev->dev, "handoff confirmed\n");
669 myri10ge_dummy_rdma(mgp, 1);
674 static int myri10ge_update_mac_address(struct myri10ge_priv *mgp, u8 * addr)
676 struct myri10ge_cmd cmd;
679 cmd.data0 = ((addr[0] << 24) | (addr[1] << 16)
680 | (addr[2] << 8) | addr[3]);
682 cmd.data1 = ((addr[4] << 8) | (addr[5]));
684 status = myri10ge_send_cmd(mgp, MXGEFW_SET_MAC_ADDRESS, &cmd, 0);
688 static int myri10ge_change_pause(struct myri10ge_priv *mgp, int pause)
690 struct myri10ge_cmd cmd;
693 ctl = pause ? MXGEFW_ENABLE_FLOW_CONTROL : MXGEFW_DISABLE_FLOW_CONTROL;
694 status = myri10ge_send_cmd(mgp, ctl, &cmd, 0);
698 "myri10ge: %s: Failed to set flow control mode\n",
707 myri10ge_change_promisc(struct myri10ge_priv *mgp, int promisc, int atomic)
709 struct myri10ge_cmd cmd;
712 ctl = promisc ? MXGEFW_ENABLE_PROMISC : MXGEFW_DISABLE_PROMISC;
713 status = myri10ge_send_cmd(mgp, ctl, &cmd, atomic);
715 printk(KERN_ERR "myri10ge: %s: Failed to set promisc mode\n",
719 static int myri10ge_dma_test(struct myri10ge_priv *mgp, int test_type)
721 struct myri10ge_cmd cmd;
724 struct page *dmatest_page;
725 dma_addr_t dmatest_bus;
728 dmatest_page = alloc_page(GFP_KERNEL);
731 dmatest_bus = pci_map_page(mgp->pdev, dmatest_page, 0, PAGE_SIZE,
734 /* Run a small DMA test.
735 * The magic multipliers to the length tell the firmware
736 * to do DMA read, write, or read+write tests. The
737 * results are returned in cmd.data0. The upper 16
738 * bits or the return is the number of transfers completed.
739 * The lower 16 bits is the time in 0.5us ticks that the
740 * transfers took to complete.
743 len = mgp->tx.boundary;
745 cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus);
746 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus);
747 cmd.data2 = len * 0x10000;
748 status = myri10ge_send_cmd(mgp, test_type, &cmd, 0);
753 mgp->read_dma = ((cmd.data0 >> 16) * len * 2) / (cmd.data0 & 0xffff);
754 cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus);
755 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus);
756 cmd.data2 = len * 0x1;
757 status = myri10ge_send_cmd(mgp, test_type, &cmd, 0);
762 mgp->write_dma = ((cmd.data0 >> 16) * len * 2) / (cmd.data0 & 0xffff);
764 cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus);
765 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus);
766 cmd.data2 = len * 0x10001;
767 status = myri10ge_send_cmd(mgp, test_type, &cmd, 0);
772 mgp->read_write_dma = ((cmd.data0 >> 16) * len * 2 * 2) /
773 (cmd.data0 & 0xffff);
776 pci_unmap_page(mgp->pdev, dmatest_bus, PAGE_SIZE, DMA_BIDIRECTIONAL);
777 put_page(dmatest_page);
779 if (status != 0 && test_type != MXGEFW_CMD_UNALIGNED_TEST)
780 dev_warn(&mgp->pdev->dev, "DMA %s benchmark failed: %d\n",
786 static int myri10ge_reset(struct myri10ge_priv *mgp)
788 struct myri10ge_cmd cmd;
792 /* try to send a reset command to the card to see if it
794 memset(&cmd, 0, sizeof(cmd));
795 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_RESET, &cmd, 0);
797 dev_err(&mgp->pdev->dev, "failed reset\n");
801 (void)myri10ge_dma_test(mgp, MXGEFW_DMA_TEST);
803 /* Now exchange information about interrupts */
805 bytes = myri10ge_max_intr_slots * sizeof(*mgp->rx_done.entry);
806 memset(mgp->rx_done.entry, 0, bytes);
807 cmd.data0 = (u32) bytes;
808 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_SIZE, &cmd, 0);
809 cmd.data0 = MYRI10GE_LOWPART_TO_U32(mgp->rx_done.bus);
810 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(mgp->rx_done.bus);
811 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_DMA, &cmd, 0);
814 myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_IRQ_ACK_OFFSET, &cmd, 0);
815 mgp->irq_claim = (__iomem __be32 *) (mgp->sram + cmd.data0);
816 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_IRQ_DEASSERT_OFFSET,
818 mgp->irq_deassert = (__iomem __be32 *) (mgp->sram + cmd.data0);
820 status |= myri10ge_send_cmd
821 (mgp, MXGEFW_CMD_GET_INTR_COAL_DELAY_OFFSET, &cmd, 0);
822 mgp->intr_coal_delay_ptr = (__iomem __be32 *) (mgp->sram + cmd.data0);
824 dev_err(&mgp->pdev->dev, "failed set interrupt parameters\n");
827 put_be32(htonl(mgp->intr_coal_delay), mgp->intr_coal_delay_ptr);
829 memset(mgp->rx_done.entry, 0, bytes);
831 /* reset mcp/driver shared state back to 0 */
834 mgp->tx.pkt_start = 0;
835 mgp->tx.pkt_done = 0;
837 mgp->rx_small.cnt = 0;
838 mgp->rx_done.idx = 0;
839 mgp->rx_done.cnt = 0;
840 mgp->link_changes = 0;
841 status = myri10ge_update_mac_address(mgp, mgp->dev->dev_addr);
842 myri10ge_change_pause(mgp, mgp->pause);
843 myri10ge_set_multicast_list(mgp->dev);
848 myri10ge_submit_8rx(struct mcp_kreq_ether_recv __iomem * dst,
849 struct mcp_kreq_ether_recv *src)
854 src->addr_low = htonl(DMA_32BIT_MASK);
855 myri10ge_pio_copy(dst, src, 4 * sizeof(*src));
857 myri10ge_pio_copy(dst + 4, src + 4, 4 * sizeof(*src));
860 put_be32(low, &dst->addr_low);
864 static inline void myri10ge_vlan_ip_csum(struct sk_buff *skb, __wsum hw_csum)
866 struct vlan_hdr *vh = (struct vlan_hdr *)(skb->data);
868 if ((skb->protocol == htons(ETH_P_8021Q)) &&
869 (vh->h_vlan_encapsulated_proto == htons(ETH_P_IP) ||
870 vh->h_vlan_encapsulated_proto == htons(ETH_P_IPV6))) {
872 skb->ip_summed = CHECKSUM_COMPLETE;
877 myri10ge_rx_skb_build(struct sk_buff *skb, u8 * va,
878 struct skb_frag_struct *rx_frags, int len, int hlen)
880 struct skb_frag_struct *skb_frags;
882 skb->len = skb->data_len = len;
883 skb->truesize = len + sizeof(struct sk_buff);
884 /* attach the page(s) */
886 skb_frags = skb_shinfo(skb)->frags;
888 memcpy(skb_frags, rx_frags, sizeof(*skb_frags));
889 len -= rx_frags->size;
892 skb_shinfo(skb)->nr_frags++;
895 /* pskb_may_pull is not available in irq context, but
896 * skb_pull() (for ether_pad and eth_type_trans()) requires
897 * the beginning of the packet in skb_headlen(), move it
899 skb_copy_to_linear_data(skb, va, hlen);
900 skb_shinfo(skb)->frags[0].page_offset += hlen;
901 skb_shinfo(skb)->frags[0].size -= hlen;
902 skb->data_len -= hlen;
904 skb_pull(skb, MXGEFW_PAD);
908 myri10ge_alloc_rx_pages(struct myri10ge_priv *mgp, struct myri10ge_rx_buf *rx,
909 int bytes, int watchdog)
914 if (unlikely(rx->watchdog_needed && !watchdog))
917 /* try to refill entire ring */
918 while (rx->fill_cnt != (rx->cnt + rx->mask + 1)) {
919 idx = rx->fill_cnt & rx->mask;
920 if (rx->page_offset + bytes <= MYRI10GE_ALLOC_SIZE) {
921 /* we can use part of previous page */
924 /* we need a new page */
926 alloc_pages(GFP_ATOMIC | __GFP_COMP,
927 MYRI10GE_ALLOC_ORDER);
928 if (unlikely(page == NULL)) {
929 if (rx->fill_cnt - rx->cnt < 16)
930 rx->watchdog_needed = 1;
935 rx->bus = pci_map_page(mgp->pdev, page, 0,
939 rx->info[idx].page = rx->page;
940 rx->info[idx].page_offset = rx->page_offset;
941 /* note that this is the address of the start of the
943 pci_unmap_addr_set(&rx->info[idx], bus, rx->bus);
944 rx->shadow[idx].addr_low =
945 htonl(MYRI10GE_LOWPART_TO_U32(rx->bus) + rx->page_offset);
946 rx->shadow[idx].addr_high =
947 htonl(MYRI10GE_HIGHPART_TO_U32(rx->bus));
949 /* start next packet on a cacheline boundary */
950 rx->page_offset += SKB_DATA_ALIGN(bytes);
952 #if MYRI10GE_ALLOC_SIZE > 4096
953 /* don't cross a 4KB boundary */
954 if ((rx->page_offset >> 12) !=
955 ((rx->page_offset + bytes - 1) >> 12))
956 rx->page_offset = (rx->page_offset + 4096) & ~4095;
960 /* copy 8 descriptors to the firmware at a time */
961 if ((idx & 7) == 7) {
962 if (rx->wc_fifo == NULL)
963 myri10ge_submit_8rx(&rx->lanai[idx - 7],
964 &rx->shadow[idx - 7]);
967 myri10ge_pio_copy(rx->wc_fifo,
968 &rx->shadow[idx - 7], 64);
975 myri10ge_unmap_rx_page(struct pci_dev *pdev,
976 struct myri10ge_rx_buffer_state *info, int bytes)
978 /* unmap the recvd page if we're the only or last user of it */
979 if (bytes >= MYRI10GE_ALLOC_SIZE / 2 ||
980 (info->page_offset + 2 * bytes) > MYRI10GE_ALLOC_SIZE) {
981 pci_unmap_page(pdev, (pci_unmap_addr(info, bus)
982 & ~(MYRI10GE_ALLOC_SIZE - 1)),
983 MYRI10GE_ALLOC_SIZE, PCI_DMA_FROMDEVICE);
987 #define MYRI10GE_HLEN 64 /* The number of bytes to copy from a
988 * page into an skb */
991 myri10ge_rx_done(struct myri10ge_priv *mgp, struct myri10ge_rx_buf *rx,
992 int bytes, int len, __wsum csum)
995 struct skb_frag_struct rx_frags[MYRI10GE_MAX_FRAGS_PER_FRAME];
996 int i, idx, hlen, remainder;
997 struct pci_dev *pdev = mgp->pdev;
998 struct net_device *dev = mgp->dev;
1002 idx = rx->cnt & rx->mask;
1003 va = page_address(rx->info[idx].page) + rx->info[idx].page_offset;
1005 /* Fill skb_frag_struct(s) with data from our receive */
1006 for (i = 0, remainder = len; remainder > 0; i++) {
1007 myri10ge_unmap_rx_page(pdev, &rx->info[idx], bytes);
1008 rx_frags[i].page = rx->info[idx].page;
1009 rx_frags[i].page_offset = rx->info[idx].page_offset;
1010 if (remainder < MYRI10GE_ALLOC_SIZE)
1011 rx_frags[i].size = remainder;
1013 rx_frags[i].size = MYRI10GE_ALLOC_SIZE;
1015 idx = rx->cnt & rx->mask;
1016 remainder -= MYRI10GE_ALLOC_SIZE;
1019 hlen = MYRI10GE_HLEN > len ? len : MYRI10GE_HLEN;
1021 /* allocate an skb to attach the page(s) to. */
1023 skb = netdev_alloc_skb(dev, MYRI10GE_HLEN + 16);
1024 if (unlikely(skb == NULL)) {
1025 mgp->stats.rx_dropped++;
1028 put_page(rx_frags[i].page);
1033 /* Attach the pages to the skb, and trim off any padding */
1034 myri10ge_rx_skb_build(skb, va, rx_frags, len, hlen);
1035 if (skb_shinfo(skb)->frags[0].size <= 0) {
1036 put_page(skb_shinfo(skb)->frags[0].page);
1037 skb_shinfo(skb)->nr_frags = 0;
1039 skb->protocol = eth_type_trans(skb, dev);
1041 if (mgp->csum_flag) {
1042 if ((skb->protocol == htons(ETH_P_IP)) ||
1043 (skb->protocol == htons(ETH_P_IPV6))) {
1045 skb->ip_summed = CHECKSUM_COMPLETE;
1047 myri10ge_vlan_ip_csum(skb, csum);
1049 netif_receive_skb(skb);
1050 dev->last_rx = jiffies;
1054 static inline void myri10ge_tx_done(struct myri10ge_priv *mgp, int mcp_index)
1056 struct pci_dev *pdev = mgp->pdev;
1057 struct myri10ge_tx_buf *tx = &mgp->tx;
1058 struct sk_buff *skb;
1062 while (tx->pkt_done != mcp_index) {
1063 idx = tx->done & tx->mask;
1064 skb = tx->info[idx].skb;
1067 tx->info[idx].skb = NULL;
1068 if (tx->info[idx].last) {
1070 tx->info[idx].last = 0;
1073 len = pci_unmap_len(&tx->info[idx], len);
1074 pci_unmap_len_set(&tx->info[idx], len, 0);
1076 mgp->stats.tx_bytes += skb->len;
1077 mgp->stats.tx_packets++;
1078 dev_kfree_skb_irq(skb);
1080 pci_unmap_single(pdev,
1081 pci_unmap_addr(&tx->info[idx],
1086 pci_unmap_page(pdev,
1087 pci_unmap_addr(&tx->info[idx],
1092 /* limit potential for livelock by only handling
1093 * 2 full tx rings per call */
1094 if (unlikely(++limit > 2 * tx->mask))
1097 /* start the queue if we've stopped it */
1098 if (netif_queue_stopped(mgp->dev)
1099 && tx->req - tx->done < (tx->mask >> 1)) {
1101 netif_wake_queue(mgp->dev);
1105 static inline void myri10ge_clean_rx_done(struct myri10ge_priv *mgp, int *limit)
1107 struct myri10ge_rx_done *rx_done = &mgp->rx_done;
1108 unsigned long rx_bytes = 0;
1109 unsigned long rx_packets = 0;
1110 unsigned long rx_ok;
1112 int idx = rx_done->idx;
1113 int cnt = rx_done->cnt;
1117 while (rx_done->entry[idx].length != 0 && *limit != 0) {
1118 length = ntohs(rx_done->entry[idx].length);
1119 rx_done->entry[idx].length = 0;
1120 checksum = csum_unfold(rx_done->entry[idx].checksum);
1121 if (length <= mgp->small_bytes)
1122 rx_ok = myri10ge_rx_done(mgp, &mgp->rx_small,
1126 rx_ok = myri10ge_rx_done(mgp, &mgp->rx_big,
1129 rx_packets += rx_ok;
1130 rx_bytes += rx_ok * (unsigned long)length;
1132 idx = cnt & (myri10ge_max_intr_slots - 1);
1134 /* limit potential for livelock by only handling a
1135 * limited number of frames. */
1140 mgp->stats.rx_packets += rx_packets;
1141 mgp->stats.rx_bytes += rx_bytes;
1143 /* restock receive rings if needed */
1144 if (mgp->rx_small.fill_cnt - mgp->rx_small.cnt < myri10ge_fill_thresh)
1145 myri10ge_alloc_rx_pages(mgp, &mgp->rx_small,
1146 mgp->small_bytes + MXGEFW_PAD, 0);
1147 if (mgp->rx_big.fill_cnt - mgp->rx_big.cnt < myri10ge_fill_thresh)
1148 myri10ge_alloc_rx_pages(mgp, &mgp->rx_big, mgp->big_bytes, 0);
1152 static inline void myri10ge_check_statblock(struct myri10ge_priv *mgp)
1154 struct mcp_irq_data *stats = mgp->fw_stats;
1156 if (unlikely(stats->stats_updated)) {
1157 if (mgp->link_state != stats->link_up) {
1158 mgp->link_state = stats->link_up;
1159 if (mgp->link_state) {
1160 if (netif_msg_link(mgp))
1162 "myri10ge: %s: link up\n",
1164 netif_carrier_on(mgp->dev);
1165 mgp->link_changes++;
1167 if (netif_msg_link(mgp))
1169 "myri10ge: %s: link down\n",
1171 netif_carrier_off(mgp->dev);
1172 mgp->link_changes++;
1175 if (mgp->rdma_tags_available !=
1176 ntohl(mgp->fw_stats->rdma_tags_available)) {
1177 mgp->rdma_tags_available =
1178 ntohl(mgp->fw_stats->rdma_tags_available);
1179 printk(KERN_WARNING "myri10ge: %s: RDMA timed out! "
1180 "%d tags left\n", mgp->dev->name,
1181 mgp->rdma_tags_available);
1183 mgp->down_cnt += stats->link_down;
1184 if (stats->link_down)
1185 wake_up(&mgp->down_wq);
1189 static int myri10ge_poll(struct net_device *netdev, int *budget)
1191 struct myri10ge_priv *mgp = netdev_priv(netdev);
1192 struct myri10ge_rx_done *rx_done = &mgp->rx_done;
1193 int limit, orig_limit, work_done;
1195 /* process as many rx events as NAPI will allow */
1196 limit = min(*budget, netdev->quota);
1198 myri10ge_clean_rx_done(mgp, &limit);
1199 work_done = orig_limit - limit;
1200 *budget -= work_done;
1201 netdev->quota -= work_done;
1203 if (rx_done->entry[rx_done->idx].length == 0 || !netif_running(netdev)) {
1204 netif_rx_complete(netdev);
1205 put_be32(htonl(3), mgp->irq_claim);
1211 static irqreturn_t myri10ge_intr(int irq, void *arg)
1213 struct myri10ge_priv *mgp = arg;
1214 struct mcp_irq_data *stats = mgp->fw_stats;
1215 struct myri10ge_tx_buf *tx = &mgp->tx;
1216 u32 send_done_count;
1219 /* make sure it is our IRQ, and that the DMA has finished */
1220 if (unlikely(!stats->valid))
1223 /* low bit indicates receives are present, so schedule
1224 * napi poll handler */
1225 if (stats->valid & 1)
1226 netif_rx_schedule(mgp->dev);
1228 if (!mgp->msi_enabled) {
1229 put_be32(0, mgp->irq_deassert);
1230 if (!myri10ge_deassert_wait)
1236 /* Wait for IRQ line to go low, if using INTx */
1240 /* check for transmit completes and receives */
1241 send_done_count = ntohl(stats->send_done_count);
1242 if (send_done_count != tx->pkt_done)
1243 myri10ge_tx_done(mgp, (int)send_done_count);
1244 if (unlikely(i > myri10ge_max_irq_loops)) {
1245 printk(KERN_WARNING "myri10ge: %s: irq stuck?\n",
1248 schedule_work(&mgp->watchdog_work);
1250 if (likely(stats->valid == 0))
1256 myri10ge_check_statblock(mgp);
1258 put_be32(htonl(3), mgp->irq_claim + 1);
1259 return (IRQ_HANDLED);
1263 myri10ge_get_settings(struct net_device *netdev, struct ethtool_cmd *cmd)
1265 cmd->autoneg = AUTONEG_DISABLE;
1266 cmd->speed = SPEED_10000;
1267 cmd->duplex = DUPLEX_FULL;
1272 myri10ge_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
1274 struct myri10ge_priv *mgp = netdev_priv(netdev);
1276 strlcpy(info->driver, "myri10ge", sizeof(info->driver));
1277 strlcpy(info->version, MYRI10GE_VERSION_STR, sizeof(info->version));
1278 strlcpy(info->fw_version, mgp->fw_version, sizeof(info->fw_version));
1279 strlcpy(info->bus_info, pci_name(mgp->pdev), sizeof(info->bus_info));
1283 myri10ge_get_coalesce(struct net_device *netdev, struct ethtool_coalesce *coal)
1285 struct myri10ge_priv *mgp = netdev_priv(netdev);
1286 coal->rx_coalesce_usecs = mgp->intr_coal_delay;
1291 myri10ge_set_coalesce(struct net_device *netdev, struct ethtool_coalesce *coal)
1293 struct myri10ge_priv *mgp = netdev_priv(netdev);
1295 mgp->intr_coal_delay = coal->rx_coalesce_usecs;
1296 put_be32(htonl(mgp->intr_coal_delay), mgp->intr_coal_delay_ptr);
1301 myri10ge_get_pauseparam(struct net_device *netdev,
1302 struct ethtool_pauseparam *pause)
1304 struct myri10ge_priv *mgp = netdev_priv(netdev);
1307 pause->rx_pause = mgp->pause;
1308 pause->tx_pause = mgp->pause;
1312 myri10ge_set_pauseparam(struct net_device *netdev,
1313 struct ethtool_pauseparam *pause)
1315 struct myri10ge_priv *mgp = netdev_priv(netdev);
1317 if (pause->tx_pause != mgp->pause)
1318 return myri10ge_change_pause(mgp, pause->tx_pause);
1319 if (pause->rx_pause != mgp->pause)
1320 return myri10ge_change_pause(mgp, pause->tx_pause);
1321 if (pause->autoneg != 0)
1327 myri10ge_get_ringparam(struct net_device *netdev,
1328 struct ethtool_ringparam *ring)
1330 struct myri10ge_priv *mgp = netdev_priv(netdev);
1332 ring->rx_mini_max_pending = mgp->rx_small.mask + 1;
1333 ring->rx_max_pending = mgp->rx_big.mask + 1;
1334 ring->rx_jumbo_max_pending = 0;
1335 ring->tx_max_pending = mgp->rx_small.mask + 1;
1336 ring->rx_mini_pending = ring->rx_mini_max_pending;
1337 ring->rx_pending = ring->rx_max_pending;
1338 ring->rx_jumbo_pending = ring->rx_jumbo_max_pending;
1339 ring->tx_pending = ring->tx_max_pending;
1342 static u32 myri10ge_get_rx_csum(struct net_device *netdev)
1344 struct myri10ge_priv *mgp = netdev_priv(netdev);
1351 static int myri10ge_set_rx_csum(struct net_device *netdev, u32 csum_enabled)
1353 struct myri10ge_priv *mgp = netdev_priv(netdev);
1355 mgp->csum_flag = MXGEFW_FLAGS_CKSUM;
1361 static const char myri10ge_gstrings_stats[][ETH_GSTRING_LEN] = {
1362 "rx_packets", "tx_packets", "rx_bytes", "tx_bytes", "rx_errors",
1363 "tx_errors", "rx_dropped", "tx_dropped", "multicast", "collisions",
1364 "rx_length_errors", "rx_over_errors", "rx_crc_errors",
1365 "rx_frame_errors", "rx_fifo_errors", "rx_missed_errors",
1366 "tx_aborted_errors", "tx_carrier_errors", "tx_fifo_errors",
1367 "tx_heartbeat_errors", "tx_window_errors",
1368 /* device-specific stats */
1369 "tx_boundary", "WC", "irq", "MSI",
1370 "read_dma_bw_MBs", "write_dma_bw_MBs", "read_write_dma_bw_MBs",
1371 "serial_number", "tx_pkt_start", "tx_pkt_done",
1372 "tx_req", "tx_done", "rx_small_cnt", "rx_big_cnt",
1373 "wake_queue", "stop_queue", "watchdog_resets", "tx_linearized",
1374 "link_changes", "link_up", "dropped_link_overflow",
1375 "dropped_link_error_or_filtered",
1376 "dropped_pause", "dropped_bad_phy", "dropped_bad_crc32",
1377 "dropped_unicast_filtered", "dropped_multicast_filtered",
1378 "dropped_runt", "dropped_overrun", "dropped_no_small_buffer",
1379 "dropped_no_big_buffer"
1382 #define MYRI10GE_NET_STATS_LEN 21
1383 #define MYRI10GE_STATS_LEN sizeof(myri10ge_gstrings_stats) / ETH_GSTRING_LEN
1386 myri10ge_get_strings(struct net_device *netdev, u32 stringset, u8 * data)
1388 switch (stringset) {
1390 memcpy(data, *myri10ge_gstrings_stats,
1391 sizeof(myri10ge_gstrings_stats));
1396 static int myri10ge_get_stats_count(struct net_device *netdev)
1398 return MYRI10GE_STATS_LEN;
1402 myri10ge_get_ethtool_stats(struct net_device *netdev,
1403 struct ethtool_stats *stats, u64 * data)
1405 struct myri10ge_priv *mgp = netdev_priv(netdev);
1408 for (i = 0; i < MYRI10GE_NET_STATS_LEN; i++)
1409 data[i] = ((unsigned long *)&mgp->stats)[i];
1411 data[i++] = (unsigned int)mgp->tx.boundary;
1412 data[i++] = (unsigned int)mgp->wc_enabled;
1413 data[i++] = (unsigned int)mgp->pdev->irq;
1414 data[i++] = (unsigned int)mgp->msi_enabled;
1415 data[i++] = (unsigned int)mgp->read_dma;
1416 data[i++] = (unsigned int)mgp->write_dma;
1417 data[i++] = (unsigned int)mgp->read_write_dma;
1418 data[i++] = (unsigned int)mgp->serial_number;
1419 data[i++] = (unsigned int)mgp->tx.pkt_start;
1420 data[i++] = (unsigned int)mgp->tx.pkt_done;
1421 data[i++] = (unsigned int)mgp->tx.req;
1422 data[i++] = (unsigned int)mgp->tx.done;
1423 data[i++] = (unsigned int)mgp->rx_small.cnt;
1424 data[i++] = (unsigned int)mgp->rx_big.cnt;
1425 data[i++] = (unsigned int)mgp->wake_queue;
1426 data[i++] = (unsigned int)mgp->stop_queue;
1427 data[i++] = (unsigned int)mgp->watchdog_resets;
1428 data[i++] = (unsigned int)mgp->tx_linearized;
1429 data[i++] = (unsigned int)mgp->link_changes;
1430 data[i++] = (unsigned int)ntohl(mgp->fw_stats->link_up);
1431 data[i++] = (unsigned int)ntohl(mgp->fw_stats->dropped_link_overflow);
1433 (unsigned int)ntohl(mgp->fw_stats->dropped_link_error_or_filtered);
1434 data[i++] = (unsigned int)ntohl(mgp->fw_stats->dropped_pause);
1435 data[i++] = (unsigned int)ntohl(mgp->fw_stats->dropped_bad_phy);
1436 data[i++] = (unsigned int)ntohl(mgp->fw_stats->dropped_bad_crc32);
1438 (unsigned int)ntohl(mgp->fw_stats->dropped_unicast_filtered);
1440 (unsigned int)ntohl(mgp->fw_stats->dropped_multicast_filtered);
1441 data[i++] = (unsigned int)ntohl(mgp->fw_stats->dropped_runt);
1442 data[i++] = (unsigned int)ntohl(mgp->fw_stats->dropped_overrun);
1443 data[i++] = (unsigned int)ntohl(mgp->fw_stats->dropped_no_small_buffer);
1444 data[i++] = (unsigned int)ntohl(mgp->fw_stats->dropped_no_big_buffer);
1447 static void myri10ge_set_msglevel(struct net_device *netdev, u32 value)
1449 struct myri10ge_priv *mgp = netdev_priv(netdev);
1450 mgp->msg_enable = value;
1453 static u32 myri10ge_get_msglevel(struct net_device *netdev)
1455 struct myri10ge_priv *mgp = netdev_priv(netdev);
1456 return mgp->msg_enable;
1459 static const struct ethtool_ops myri10ge_ethtool_ops = {
1460 .get_settings = myri10ge_get_settings,
1461 .get_drvinfo = myri10ge_get_drvinfo,
1462 .get_coalesce = myri10ge_get_coalesce,
1463 .set_coalesce = myri10ge_set_coalesce,
1464 .get_pauseparam = myri10ge_get_pauseparam,
1465 .set_pauseparam = myri10ge_set_pauseparam,
1466 .get_ringparam = myri10ge_get_ringparam,
1467 .get_rx_csum = myri10ge_get_rx_csum,
1468 .set_rx_csum = myri10ge_set_rx_csum,
1469 .get_tx_csum = ethtool_op_get_tx_csum,
1470 .set_tx_csum = ethtool_op_set_tx_hw_csum,
1471 .get_sg = ethtool_op_get_sg,
1472 .set_sg = ethtool_op_set_sg,
1473 .get_tso = ethtool_op_get_tso,
1474 .set_tso = ethtool_op_set_tso,
1475 .get_link = ethtool_op_get_link,
1476 .get_strings = myri10ge_get_strings,
1477 .get_stats_count = myri10ge_get_stats_count,
1478 .get_ethtool_stats = myri10ge_get_ethtool_stats,
1479 .set_msglevel = myri10ge_set_msglevel,
1480 .get_msglevel = myri10ge_get_msglevel
1483 static int myri10ge_allocate_rings(struct net_device *dev)
1485 struct myri10ge_priv *mgp;
1486 struct myri10ge_cmd cmd;
1487 int tx_ring_size, rx_ring_size;
1488 int tx_ring_entries, rx_ring_entries;
1492 mgp = netdev_priv(dev);
1494 /* get ring sizes */
1496 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SEND_RING_SIZE, &cmd, 0);
1497 tx_ring_size = cmd.data0;
1498 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_RX_RING_SIZE, &cmd, 0);
1501 rx_ring_size = cmd.data0;
1503 tx_ring_entries = tx_ring_size / sizeof(struct mcp_kreq_ether_send);
1504 rx_ring_entries = rx_ring_size / sizeof(struct mcp_dma_addr);
1505 mgp->tx.mask = tx_ring_entries - 1;
1506 mgp->rx_small.mask = mgp->rx_big.mask = rx_ring_entries - 1;
1510 /* allocate the host shadow rings */
1512 bytes = 8 + (MYRI10GE_MAX_SEND_DESC_TSO + 4)
1513 * sizeof(*mgp->tx.req_list);
1514 mgp->tx.req_bytes = kzalloc(bytes, GFP_KERNEL);
1515 if (mgp->tx.req_bytes == NULL)
1516 goto abort_with_nothing;
1518 /* ensure req_list entries are aligned to 8 bytes */
1519 mgp->tx.req_list = (struct mcp_kreq_ether_send *)
1520 ALIGN((unsigned long)mgp->tx.req_bytes, 8);
1522 bytes = rx_ring_entries * sizeof(*mgp->rx_small.shadow);
1523 mgp->rx_small.shadow = kzalloc(bytes, GFP_KERNEL);
1524 if (mgp->rx_small.shadow == NULL)
1525 goto abort_with_tx_req_bytes;
1527 bytes = rx_ring_entries * sizeof(*mgp->rx_big.shadow);
1528 mgp->rx_big.shadow = kzalloc(bytes, GFP_KERNEL);
1529 if (mgp->rx_big.shadow == NULL)
1530 goto abort_with_rx_small_shadow;
1532 /* allocate the host info rings */
1534 bytes = tx_ring_entries * sizeof(*mgp->tx.info);
1535 mgp->tx.info = kzalloc(bytes, GFP_KERNEL);
1536 if (mgp->tx.info == NULL)
1537 goto abort_with_rx_big_shadow;
1539 bytes = rx_ring_entries * sizeof(*mgp->rx_small.info);
1540 mgp->rx_small.info = kzalloc(bytes, GFP_KERNEL);
1541 if (mgp->rx_small.info == NULL)
1542 goto abort_with_tx_info;
1544 bytes = rx_ring_entries * sizeof(*mgp->rx_big.info);
1545 mgp->rx_big.info = kzalloc(bytes, GFP_KERNEL);
1546 if (mgp->rx_big.info == NULL)
1547 goto abort_with_rx_small_info;
1549 /* Fill the receive rings */
1550 mgp->rx_big.cnt = 0;
1551 mgp->rx_small.cnt = 0;
1552 mgp->rx_big.fill_cnt = 0;
1553 mgp->rx_small.fill_cnt = 0;
1554 mgp->rx_small.page_offset = MYRI10GE_ALLOC_SIZE;
1555 mgp->rx_big.page_offset = MYRI10GE_ALLOC_SIZE;
1556 mgp->rx_small.watchdog_needed = 0;
1557 mgp->rx_big.watchdog_needed = 0;
1558 myri10ge_alloc_rx_pages(mgp, &mgp->rx_small,
1559 mgp->small_bytes + MXGEFW_PAD, 0);
1561 if (mgp->rx_small.fill_cnt < mgp->rx_small.mask + 1) {
1562 printk(KERN_ERR "myri10ge: %s: alloced only %d small bufs\n",
1563 dev->name, mgp->rx_small.fill_cnt);
1564 goto abort_with_rx_small_ring;
1567 myri10ge_alloc_rx_pages(mgp, &mgp->rx_big, mgp->big_bytes, 0);
1568 if (mgp->rx_big.fill_cnt < mgp->rx_big.mask + 1) {
1569 printk(KERN_ERR "myri10ge: %s: alloced only %d big bufs\n",
1570 dev->name, mgp->rx_big.fill_cnt);
1571 goto abort_with_rx_big_ring;
1576 abort_with_rx_big_ring:
1577 for (i = mgp->rx_big.cnt; i < mgp->rx_big.fill_cnt; i++) {
1578 int idx = i & mgp->rx_big.mask;
1579 myri10ge_unmap_rx_page(mgp->pdev, &mgp->rx_big.info[idx],
1581 put_page(mgp->rx_big.info[idx].page);
1584 abort_with_rx_small_ring:
1585 for (i = mgp->rx_small.cnt; i < mgp->rx_small.fill_cnt; i++) {
1586 int idx = i & mgp->rx_small.mask;
1587 myri10ge_unmap_rx_page(mgp->pdev, &mgp->rx_small.info[idx],
1588 mgp->small_bytes + MXGEFW_PAD);
1589 put_page(mgp->rx_small.info[idx].page);
1592 kfree(mgp->rx_big.info);
1594 abort_with_rx_small_info:
1595 kfree(mgp->rx_small.info);
1598 kfree(mgp->tx.info);
1600 abort_with_rx_big_shadow:
1601 kfree(mgp->rx_big.shadow);
1603 abort_with_rx_small_shadow:
1604 kfree(mgp->rx_small.shadow);
1606 abort_with_tx_req_bytes:
1607 kfree(mgp->tx.req_bytes);
1608 mgp->tx.req_bytes = NULL;
1609 mgp->tx.req_list = NULL;
1615 static void myri10ge_free_rings(struct net_device *dev)
1617 struct myri10ge_priv *mgp;
1618 struct sk_buff *skb;
1619 struct myri10ge_tx_buf *tx;
1622 mgp = netdev_priv(dev);
1624 for (i = mgp->rx_big.cnt; i < mgp->rx_big.fill_cnt; i++) {
1625 idx = i & mgp->rx_big.mask;
1626 if (i == mgp->rx_big.fill_cnt - 1)
1627 mgp->rx_big.info[idx].page_offset = MYRI10GE_ALLOC_SIZE;
1628 myri10ge_unmap_rx_page(mgp->pdev, &mgp->rx_big.info[idx],
1630 put_page(mgp->rx_big.info[idx].page);
1633 for (i = mgp->rx_small.cnt; i < mgp->rx_small.fill_cnt; i++) {
1634 idx = i & mgp->rx_small.mask;
1635 if (i == mgp->rx_small.fill_cnt - 1)
1636 mgp->rx_small.info[idx].page_offset =
1637 MYRI10GE_ALLOC_SIZE;
1638 myri10ge_unmap_rx_page(mgp->pdev, &mgp->rx_small.info[idx],
1639 mgp->small_bytes + MXGEFW_PAD);
1640 put_page(mgp->rx_small.info[idx].page);
1643 while (tx->done != tx->req) {
1644 idx = tx->done & tx->mask;
1645 skb = tx->info[idx].skb;
1648 tx->info[idx].skb = NULL;
1650 len = pci_unmap_len(&tx->info[idx], len);
1651 pci_unmap_len_set(&tx->info[idx], len, 0);
1653 mgp->stats.tx_dropped++;
1654 dev_kfree_skb_any(skb);
1656 pci_unmap_single(mgp->pdev,
1657 pci_unmap_addr(&tx->info[idx],
1662 pci_unmap_page(mgp->pdev,
1663 pci_unmap_addr(&tx->info[idx],
1668 kfree(mgp->rx_big.info);
1670 kfree(mgp->rx_small.info);
1672 kfree(mgp->tx.info);
1674 kfree(mgp->rx_big.shadow);
1676 kfree(mgp->rx_small.shadow);
1678 kfree(mgp->tx.req_bytes);
1679 mgp->tx.req_bytes = NULL;
1680 mgp->tx.req_list = NULL;
1683 static int myri10ge_request_irq(struct myri10ge_priv *mgp)
1685 struct pci_dev *pdev = mgp->pdev;
1689 status = pci_enable_msi(pdev);
1692 "Error %d setting up MSI; falling back to xPIC\n",
1695 mgp->msi_enabled = 1;
1697 mgp->msi_enabled = 0;
1699 status = request_irq(pdev->irq, myri10ge_intr, IRQF_SHARED,
1700 mgp->dev->name, mgp);
1702 dev_err(&pdev->dev, "failed to allocate IRQ\n");
1703 if (mgp->msi_enabled)
1704 pci_disable_msi(pdev);
1709 static void myri10ge_free_irq(struct myri10ge_priv *mgp)
1711 struct pci_dev *pdev = mgp->pdev;
1713 free_irq(pdev->irq, mgp);
1714 if (mgp->msi_enabled)
1715 pci_disable_msi(pdev);
1718 static int myri10ge_open(struct net_device *dev)
1720 struct myri10ge_priv *mgp;
1721 struct myri10ge_cmd cmd;
1722 int status, big_pow2;
1724 mgp = netdev_priv(dev);
1726 if (mgp->running != MYRI10GE_ETH_STOPPED)
1729 mgp->running = MYRI10GE_ETH_STARTING;
1730 status = myri10ge_reset(mgp);
1732 printk(KERN_ERR "myri10ge: %s: failed reset\n", dev->name);
1733 goto abort_with_nothing;
1736 status = myri10ge_request_irq(mgp);
1738 goto abort_with_nothing;
1740 /* decide what small buffer size to use. For good TCP rx
1741 * performance, it is important to not receive 1514 byte
1742 * frames into jumbo buffers, as it confuses the socket buffer
1743 * accounting code, leading to drops and erratic performance.
1746 if (dev->mtu <= ETH_DATA_LEN)
1747 /* enough for a TCP header */
1748 mgp->small_bytes = (128 > SMP_CACHE_BYTES)
1749 ? (128 - MXGEFW_PAD)
1750 : (SMP_CACHE_BYTES - MXGEFW_PAD);
1752 /* enough for a vlan encapsulated ETH_DATA_LEN frame */
1753 mgp->small_bytes = VLAN_ETH_FRAME_LEN;
1755 /* Override the small buffer size? */
1756 if (myri10ge_small_bytes > 0)
1757 mgp->small_bytes = myri10ge_small_bytes;
1759 /* get the lanai pointers to the send and receive rings */
1761 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SEND_OFFSET, &cmd, 0);
1763 (struct mcp_kreq_ether_send __iomem *)(mgp->sram + cmd.data0);
1766 myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SMALL_RX_OFFSET, &cmd, 0);
1767 mgp->rx_small.lanai =
1768 (struct mcp_kreq_ether_recv __iomem *)(mgp->sram + cmd.data0);
1770 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_BIG_RX_OFFSET, &cmd, 0);
1772 (struct mcp_kreq_ether_recv __iomem *)(mgp->sram + cmd.data0);
1776 "myri10ge: %s: failed to get ring sizes or locations\n",
1778 mgp->running = MYRI10GE_ETH_STOPPED;
1779 goto abort_with_irq;
1782 if (myri10ge_wcfifo && mgp->wc_enabled) {
1783 mgp->tx.wc_fifo = (u8 __iomem *) mgp->sram + MXGEFW_ETH_SEND_4;
1784 mgp->rx_small.wc_fifo =
1785 (u8 __iomem *) mgp->sram + MXGEFW_ETH_RECV_SMALL;
1786 mgp->rx_big.wc_fifo =
1787 (u8 __iomem *) mgp->sram + MXGEFW_ETH_RECV_BIG;
1789 mgp->tx.wc_fifo = NULL;
1790 mgp->rx_small.wc_fifo = NULL;
1791 mgp->rx_big.wc_fifo = NULL;
1794 /* Firmware needs the big buff size as a power of 2. Lie and
1795 * tell him the buffer is larger, because we only use 1
1796 * buffer/pkt, and the mtu will prevent overruns.
1798 big_pow2 = dev->mtu + ETH_HLEN + VLAN_HLEN + MXGEFW_PAD;
1799 if (big_pow2 < MYRI10GE_ALLOC_SIZE / 2) {
1800 while ((big_pow2 & (big_pow2 - 1)) != 0)
1802 mgp->big_bytes = dev->mtu + ETH_HLEN + VLAN_HLEN + MXGEFW_PAD;
1804 big_pow2 = MYRI10GE_ALLOC_SIZE;
1805 mgp->big_bytes = big_pow2;
1808 status = myri10ge_allocate_rings(dev);
1810 goto abort_with_irq;
1812 /* now give firmware buffers sizes, and MTU */
1813 cmd.data0 = dev->mtu + ETH_HLEN + VLAN_HLEN;
1814 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_MTU, &cmd, 0);
1815 cmd.data0 = mgp->small_bytes;
1817 myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_SMALL_BUFFER_SIZE, &cmd, 0);
1818 cmd.data0 = big_pow2;
1820 myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_BIG_BUFFER_SIZE, &cmd, 0);
1822 printk(KERN_ERR "myri10ge: %s: Couldn't set buffer sizes\n",
1824 goto abort_with_rings;
1827 cmd.data0 = MYRI10GE_LOWPART_TO_U32(mgp->fw_stats_bus);
1828 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(mgp->fw_stats_bus);
1829 cmd.data2 = sizeof(struct mcp_irq_data);
1830 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_STATS_DMA_V2, &cmd, 0);
1831 if (status == -ENOSYS) {
1832 dma_addr_t bus = mgp->fw_stats_bus;
1833 bus += offsetof(struct mcp_irq_data, send_done_count);
1834 cmd.data0 = MYRI10GE_LOWPART_TO_U32(bus);
1835 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(bus);
1836 status = myri10ge_send_cmd(mgp,
1837 MXGEFW_CMD_SET_STATS_DMA_OBSOLETE,
1839 /* Firmware cannot support multicast without STATS_DMA_V2 */
1840 mgp->fw_multicast_support = 0;
1842 mgp->fw_multicast_support = 1;
1845 printk(KERN_ERR "myri10ge: %s: Couldn't set stats DMA\n",
1847 goto abort_with_rings;
1850 mgp->link_state = htonl(~0U);
1851 mgp->rdma_tags_available = 15;
1853 netif_poll_enable(mgp->dev); /* must happen prior to any irq */
1855 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ETHERNET_UP, &cmd, 0);
1857 printk(KERN_ERR "myri10ge: %s: Couldn't bring up link\n",
1859 goto abort_with_rings;
1862 mgp->wake_queue = 0;
1863 mgp->stop_queue = 0;
1864 mgp->running = MYRI10GE_ETH_RUNNING;
1865 mgp->watchdog_timer.expires = jiffies + myri10ge_watchdog_timeout * HZ;
1866 add_timer(&mgp->watchdog_timer);
1867 netif_wake_queue(dev);
1871 myri10ge_free_rings(dev);
1874 myri10ge_free_irq(mgp);
1877 mgp->running = MYRI10GE_ETH_STOPPED;
1881 static int myri10ge_close(struct net_device *dev)
1883 struct myri10ge_priv *mgp;
1884 struct myri10ge_cmd cmd;
1885 int status, old_down_cnt;
1887 mgp = netdev_priv(dev);
1889 if (mgp->running != MYRI10GE_ETH_RUNNING)
1892 if (mgp->tx.req_bytes == NULL)
1895 del_timer_sync(&mgp->watchdog_timer);
1896 mgp->running = MYRI10GE_ETH_STOPPING;
1897 netif_poll_disable(mgp->dev);
1898 netif_carrier_off(dev);
1899 netif_stop_queue(dev);
1900 old_down_cnt = mgp->down_cnt;
1902 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ETHERNET_DOWN, &cmd, 0);
1904 printk(KERN_ERR "myri10ge: %s: Couldn't bring down link\n",
1907 wait_event_timeout(mgp->down_wq, old_down_cnt != mgp->down_cnt, HZ);
1908 if (old_down_cnt == mgp->down_cnt)
1909 printk(KERN_ERR "myri10ge: %s never got down irq\n", dev->name);
1911 netif_tx_disable(dev);
1912 myri10ge_free_irq(mgp);
1913 myri10ge_free_rings(dev);
1915 mgp->running = MYRI10GE_ETH_STOPPED;
1919 /* copy an array of struct mcp_kreq_ether_send's to the mcp. Copy
1920 * backwards one at a time and handle ring wraps */
1923 myri10ge_submit_req_backwards(struct myri10ge_tx_buf *tx,
1924 struct mcp_kreq_ether_send *src, int cnt)
1926 int idx, starting_slot;
1927 starting_slot = tx->req;
1930 idx = (starting_slot + cnt) & tx->mask;
1931 myri10ge_pio_copy(&tx->lanai[idx], &src[cnt], sizeof(*src));
1937 * copy an array of struct mcp_kreq_ether_send's to the mcp. Copy
1938 * at most 32 bytes at a time, so as to avoid involving the software
1939 * pio handler in the nic. We re-write the first segment's flags
1940 * to mark them valid only after writing the entire chain.
1944 myri10ge_submit_req(struct myri10ge_tx_buf *tx, struct mcp_kreq_ether_send *src,
1948 struct mcp_kreq_ether_send __iomem *dstp, *dst;
1949 struct mcp_kreq_ether_send *srcp;
1952 idx = tx->req & tx->mask;
1954 last_flags = src->flags;
1957 dst = dstp = &tx->lanai[idx];
1960 if ((idx + cnt) < tx->mask) {
1961 for (i = 0; i < (cnt - 1); i += 2) {
1962 myri10ge_pio_copy(dstp, srcp, 2 * sizeof(*src));
1963 mb(); /* force write every 32 bytes */
1968 /* submit all but the first request, and ensure
1969 * that it is submitted below */
1970 myri10ge_submit_req_backwards(tx, src, cnt);
1974 /* submit the first request */
1975 myri10ge_pio_copy(dstp, srcp, sizeof(*src));
1976 mb(); /* barrier before setting valid flag */
1979 /* re-write the last 32-bits with the valid flags */
1980 src->flags = last_flags;
1981 put_be32(*((__be32 *) src + 3), (__be32 __iomem *) dst + 3);
1987 myri10ge_submit_req_wc(struct myri10ge_tx_buf *tx,
1988 struct mcp_kreq_ether_send *src, int cnt)
1993 myri10ge_pio_copy(tx->wc_fifo, src, 64);
1999 /* pad it to 64 bytes. The src is 64 bytes bigger than it
2000 * needs to be so that we don't overrun it */
2001 myri10ge_pio_copy(tx->wc_fifo + MXGEFW_ETH_SEND_OFFSET(cnt),
2008 * Transmit a packet. We need to split the packet so that a single
2009 * segment does not cross myri10ge->tx.boundary, so this makes segment
2010 * counting tricky. So rather than try to count segments up front, we
2011 * just give up if there are too few segments to hold a reasonably
2012 * fragmented packet currently available. If we run
2013 * out of segments while preparing a packet for DMA, we just linearize
2017 static int myri10ge_xmit(struct sk_buff *skb, struct net_device *dev)
2019 struct myri10ge_priv *mgp = netdev_priv(dev);
2020 struct mcp_kreq_ether_send *req;
2021 struct myri10ge_tx_buf *tx = &mgp->tx;
2022 struct skb_frag_struct *frag;
2025 __be32 high_swapped;
2027 int idx, last_idx, avail, frag_cnt, frag_idx, count, mss, max_segments;
2028 u16 pseudo_hdr_offset, cksum_offset;
2029 int cum_len, seglen, boundary, rdma_count;
2034 avail = tx->mask - 1 - (tx->req - tx->done);
2037 max_segments = MXGEFW_MAX_SEND_DESC;
2039 if (skb_is_gso(skb)) {
2040 mss = skb_shinfo(skb)->gso_size;
2041 max_segments = MYRI10GE_MAX_SEND_DESC_TSO;
2044 if ((unlikely(avail < max_segments))) {
2045 /* we are out of transmit resources */
2047 netif_stop_queue(dev);
2051 /* Setup checksum offloading, if needed */
2053 pseudo_hdr_offset = 0;
2055 flags = (MXGEFW_FLAGS_NO_TSO | MXGEFW_FLAGS_FIRST);
2056 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2057 cksum_offset = skb_transport_offset(skb);
2058 pseudo_hdr_offset = cksum_offset + skb->csum_offset;
2059 /* If the headers are excessively large, then we must
2060 * fall back to a software checksum */
2061 if (unlikely(cksum_offset > 255 || pseudo_hdr_offset > 127)) {
2062 if (skb_checksum_help(skb))
2065 pseudo_hdr_offset = 0;
2067 odd_flag = MXGEFW_FLAGS_ALIGN_ODD;
2068 flags |= MXGEFW_FLAGS_CKSUM;
2074 if (mss) { /* TSO */
2075 /* this removes any CKSUM flag from before */
2076 flags = (MXGEFW_FLAGS_TSO_HDR | MXGEFW_FLAGS_FIRST);
2078 /* negative cum_len signifies to the
2079 * send loop that we are still in the
2080 * header portion of the TSO packet.
2081 * TSO header must be at most 134 bytes long */
2082 cum_len = -(skb_transport_offset(skb) + tcp_hdrlen(skb));
2084 /* for TSO, pseudo_hdr_offset holds mss.
2085 * The firmware figures out where to put
2086 * the checksum by parsing the header. */
2087 pseudo_hdr_offset = mss;
2089 /* Mark small packets, and pad out tiny packets */
2090 if (skb->len <= MXGEFW_SEND_SMALL_SIZE) {
2091 flags |= MXGEFW_FLAGS_SMALL;
2093 /* pad frames to at least ETH_ZLEN bytes */
2094 if (unlikely(skb->len < ETH_ZLEN)) {
2095 if (skb_padto(skb, ETH_ZLEN)) {
2096 /* The packet is gone, so we must
2098 mgp->stats.tx_dropped += 1;
2101 /* adjust the len to account for the zero pad
2102 * so that the nic can know how long it is */
2103 skb->len = ETH_ZLEN;
2107 /* map the skb for DMA */
2108 len = skb->len - skb->data_len;
2109 idx = tx->req & tx->mask;
2110 tx->info[idx].skb = skb;
2111 bus = pci_map_single(mgp->pdev, skb->data, len, PCI_DMA_TODEVICE);
2112 pci_unmap_addr_set(&tx->info[idx], bus, bus);
2113 pci_unmap_len_set(&tx->info[idx], len, len);
2115 frag_cnt = skb_shinfo(skb)->nr_frags;
2120 /* "rdma_count" is the number of RDMAs belonging to the
2121 * current packet BEFORE the current send request. For
2122 * non-TSO packets, this is equal to "count".
2123 * For TSO packets, rdma_count needs to be reset
2124 * to 0 after a segment cut.
2126 * The rdma_count field of the send request is
2127 * the number of RDMAs of the packet starting at
2128 * that request. For TSO send requests with one ore more cuts
2129 * in the middle, this is the number of RDMAs starting
2130 * after the last cut in the request. All previous
2131 * segments before the last cut implicitly have 1 RDMA.
2133 * Since the number of RDMAs is not known beforehand,
2134 * it must be filled-in retroactively - after each
2135 * segmentation cut or at the end of the entire packet.
2139 /* Break the SKB or Fragment up into pieces which
2140 * do not cross mgp->tx.boundary */
2141 low = MYRI10GE_LOWPART_TO_U32(bus);
2142 high_swapped = htonl(MYRI10GE_HIGHPART_TO_U32(bus));
2147 if (unlikely(count == max_segments))
2148 goto abort_linearize;
2150 boundary = (low + tx->boundary) & ~(tx->boundary - 1);
2151 seglen = boundary - low;
2154 flags_next = flags & ~MXGEFW_FLAGS_FIRST;
2155 cum_len_next = cum_len + seglen;
2156 if (mss) { /* TSO */
2157 (req - rdma_count)->rdma_count = rdma_count + 1;
2159 if (likely(cum_len >= 0)) { /* payload */
2160 int next_is_first, chop;
2162 chop = (cum_len_next > mss);
2163 cum_len_next = cum_len_next % mss;
2164 next_is_first = (cum_len_next == 0);
2165 flags |= chop * MXGEFW_FLAGS_TSO_CHOP;
2166 flags_next |= next_is_first *
2168 rdma_count |= -(chop | next_is_first);
2169 rdma_count += chop & !next_is_first;
2170 } else if (likely(cum_len_next >= 0)) { /* header ends */
2176 small = (mss <= MXGEFW_SEND_SMALL_SIZE);
2177 flags_next = MXGEFW_FLAGS_TSO_PLD |
2178 MXGEFW_FLAGS_FIRST |
2179 (small * MXGEFW_FLAGS_SMALL);
2182 req->addr_high = high_swapped;
2183 req->addr_low = htonl(low);
2184 req->pseudo_hdr_offset = htons(pseudo_hdr_offset);
2185 req->pad = 0; /* complete solid 16-byte block; does this matter? */
2186 req->rdma_count = 1;
2187 req->length = htons(seglen);
2188 req->cksum_offset = cksum_offset;
2189 req->flags = flags | ((cum_len & 1) * odd_flag);
2193 cum_len = cum_len_next;
2198 if (unlikely(cksum_offset > seglen))
2199 cksum_offset -= seglen;
2203 if (frag_idx == frag_cnt)
2206 /* map next fragment for DMA */
2207 idx = (count + tx->req) & tx->mask;
2208 frag = &skb_shinfo(skb)->frags[frag_idx];
2211 bus = pci_map_page(mgp->pdev, frag->page, frag->page_offset,
2212 len, PCI_DMA_TODEVICE);
2213 pci_unmap_addr_set(&tx->info[idx], bus, bus);
2214 pci_unmap_len_set(&tx->info[idx], len, len);
2217 (req - rdma_count)->rdma_count = rdma_count;
2221 req->flags |= MXGEFW_FLAGS_TSO_LAST;
2222 } while (!(req->flags & (MXGEFW_FLAGS_TSO_CHOP |
2223 MXGEFW_FLAGS_FIRST)));
2224 idx = ((count - 1) + tx->req) & tx->mask;
2225 tx->info[idx].last = 1;
2226 if (tx->wc_fifo == NULL)
2227 myri10ge_submit_req(tx, tx->req_list, count);
2229 myri10ge_submit_req_wc(tx, tx->req_list, count);
2231 if ((avail - count) < MXGEFW_MAX_SEND_DESC) {
2233 netif_stop_queue(dev);
2235 dev->trans_start = jiffies;
2239 /* Free any DMA resources we've alloced and clear out the skb
2240 * slot so as to not trip up assertions, and to avoid a
2241 * double-free if linearizing fails */
2243 last_idx = (idx + 1) & tx->mask;
2244 idx = tx->req & tx->mask;
2245 tx->info[idx].skb = NULL;
2247 len = pci_unmap_len(&tx->info[idx], len);
2249 if (tx->info[idx].skb != NULL)
2250 pci_unmap_single(mgp->pdev,
2251 pci_unmap_addr(&tx->info[idx],
2255 pci_unmap_page(mgp->pdev,
2256 pci_unmap_addr(&tx->info[idx],
2259 pci_unmap_len_set(&tx->info[idx], len, 0);
2260 tx->info[idx].skb = NULL;
2262 idx = (idx + 1) & tx->mask;
2263 } while (idx != last_idx);
2264 if (skb_is_gso(skb)) {
2266 "myri10ge: %s: TSO but wanted to linearize?!?!?\n",
2271 if (skb_linearize(skb))
2274 mgp->tx_linearized++;
2278 dev_kfree_skb_any(skb);
2279 mgp->stats.tx_dropped += 1;
2284 static struct net_device_stats *myri10ge_get_stats(struct net_device *dev)
2286 struct myri10ge_priv *mgp = netdev_priv(dev);
2290 static void myri10ge_set_multicast_list(struct net_device *dev)
2292 struct myri10ge_cmd cmd;
2293 struct myri10ge_priv *mgp;
2294 struct dev_mc_list *mc_list;
2295 __be32 data[2] = { 0, 0 };
2298 mgp = netdev_priv(dev);
2299 /* can be called from atomic contexts,
2300 * pass 1 to force atomicity in myri10ge_send_cmd() */
2301 myri10ge_change_promisc(mgp, dev->flags & IFF_PROMISC, 1);
2303 /* This firmware is known to not support multicast */
2304 if (!mgp->fw_multicast_support)
2307 /* Disable multicast filtering */
2309 err = myri10ge_send_cmd(mgp, MXGEFW_ENABLE_ALLMULTI, &cmd, 1);
2311 printk(KERN_ERR "myri10ge: %s: Failed MXGEFW_ENABLE_ALLMULTI,"
2312 " error status: %d\n", dev->name, err);
2316 if ((dev->flags & IFF_ALLMULTI) || mgp->adopted_rx_filter_bug) {
2317 /* request to disable multicast filtering, so quit here */
2321 /* Flush the filters */
2323 err = myri10ge_send_cmd(mgp, MXGEFW_LEAVE_ALL_MULTICAST_GROUPS,
2327 "myri10ge: %s: Failed MXGEFW_LEAVE_ALL_MULTICAST_GROUPS"
2328 ", error status: %d\n", dev->name, err);
2332 /* Walk the multicast list, and add each address */
2333 for (mc_list = dev->mc_list; mc_list != NULL; mc_list = mc_list->next) {
2334 memcpy(data, &mc_list->dmi_addr, 6);
2335 cmd.data0 = ntohl(data[0]);
2336 cmd.data1 = ntohl(data[1]);
2337 err = myri10ge_send_cmd(mgp, MXGEFW_JOIN_MULTICAST_GROUP,
2341 printk(KERN_ERR "myri10ge: %s: Failed "
2342 "MXGEFW_JOIN_MULTICAST_GROUP, error status:"
2343 "%d\t", dev->name, err);
2344 printk(KERN_ERR "MAC %02x:%02x:%02x:%02x:%02x:%02x\n",
2345 ((unsigned char *)&mc_list->dmi_addr)[0],
2346 ((unsigned char *)&mc_list->dmi_addr)[1],
2347 ((unsigned char *)&mc_list->dmi_addr)[2],
2348 ((unsigned char *)&mc_list->dmi_addr)[3],
2349 ((unsigned char *)&mc_list->dmi_addr)[4],
2350 ((unsigned char *)&mc_list->dmi_addr)[5]
2355 /* Enable multicast filtering */
2356 err = myri10ge_send_cmd(mgp, MXGEFW_DISABLE_ALLMULTI, &cmd, 1);
2358 printk(KERN_ERR "myri10ge: %s: Failed MXGEFW_DISABLE_ALLMULTI,"
2359 "error status: %d\n", dev->name, err);
2369 static int myri10ge_set_mac_address(struct net_device *dev, void *addr)
2371 struct sockaddr *sa = addr;
2372 struct myri10ge_priv *mgp = netdev_priv(dev);
2375 if (!is_valid_ether_addr(sa->sa_data))
2376 return -EADDRNOTAVAIL;
2378 status = myri10ge_update_mac_address(mgp, sa->sa_data);
2381 "myri10ge: %s: changing mac address failed with %d\n",
2386 /* change the dev structure */
2387 memcpy(dev->dev_addr, sa->sa_data, 6);
2391 static int myri10ge_change_mtu(struct net_device *dev, int new_mtu)
2393 struct myri10ge_priv *mgp = netdev_priv(dev);
2396 if ((new_mtu < 68) || (ETH_HLEN + new_mtu > MYRI10GE_MAX_ETHER_MTU)) {
2397 printk(KERN_ERR "myri10ge: %s: new mtu (%d) is not valid\n",
2398 dev->name, new_mtu);
2401 printk(KERN_INFO "%s: changing mtu from %d to %d\n",
2402 dev->name, dev->mtu, new_mtu);
2404 /* if we change the mtu on an active device, we must
2405 * reset the device so the firmware sees the change */
2406 myri10ge_close(dev);
2416 * Enable ECRC to align PCI-E Completion packets on an 8-byte boundary.
2417 * Only do it if the bridge is a root port since we don't want to disturb
2418 * any other device, except if forced with myri10ge_ecrc_enable > 1.
2421 static void myri10ge_enable_ecrc(struct myri10ge_priv *mgp)
2423 struct pci_dev *bridge = mgp->pdev->bus->self;
2424 struct device *dev = &mgp->pdev->dev;
2431 if (!myri10ge_ecrc_enable || !bridge)
2434 /* check that the bridge is a root port */
2435 cap = pci_find_capability(bridge, PCI_CAP_ID_EXP);
2436 pci_read_config_word(bridge, cap + PCI_CAP_FLAGS, &val);
2437 ext_type = (val & PCI_EXP_FLAGS_TYPE) >> 4;
2438 if (ext_type != PCI_EXP_TYPE_ROOT_PORT) {
2439 if (myri10ge_ecrc_enable > 1) {
2440 struct pci_dev *old_bridge = bridge;
2442 /* Walk the hierarchy up to the root port
2443 * where ECRC has to be enabled */
2445 bridge = bridge->bus->self;
2448 "Failed to find root port"
2449 " to force ECRC\n");
2453 pci_find_capability(bridge, PCI_CAP_ID_EXP);
2454 pci_read_config_word(bridge,
2455 cap + PCI_CAP_FLAGS, &val);
2456 ext_type = (val & PCI_EXP_FLAGS_TYPE) >> 4;
2457 } while (ext_type != PCI_EXP_TYPE_ROOT_PORT);
2460 "Forcing ECRC on non-root port %s"
2461 " (enabling on root port %s)\n",
2462 pci_name(old_bridge), pci_name(bridge));
2465 "Not enabling ECRC on non-root port %s\n",
2471 cap = pci_find_ext_capability(bridge, PCI_EXT_CAP_ID_ERR);
2475 ret = pci_read_config_dword(bridge, cap + PCI_ERR_CAP, &err_cap);
2477 dev_err(dev, "failed reading ext-conf-space of %s\n",
2479 dev_err(dev, "\t pci=nommconf in use? "
2480 "or buggy/incomplete/absent ACPI MCFG attr?\n");
2483 if (!(err_cap & PCI_ERR_CAP_ECRC_GENC))
2486 err_cap |= PCI_ERR_CAP_ECRC_GENE;
2487 pci_write_config_dword(bridge, cap + PCI_ERR_CAP, err_cap);
2488 dev_info(dev, "Enabled ECRC on upstream bridge %s\n", pci_name(bridge));
2492 * The Lanai Z8E PCI-E interface achieves higher Read-DMA throughput
2493 * when the PCI-E Completion packets are aligned on an 8-byte
2494 * boundary. Some PCI-E chip sets always align Completion packets; on
2495 * the ones that do not, the alignment can be enforced by enabling
2496 * ECRC generation (if supported).
2498 * When PCI-E Completion packets are not aligned, it is actually more
2499 * efficient to limit Read-DMA transactions to 2KB, rather than 4KB.
2501 * If the driver can neither enable ECRC nor verify that it has
2502 * already been enabled, then it must use a firmware image which works
2503 * around unaligned completion packets (myri10ge_ethp_z8e.dat), and it
2504 * should also ensure that it never gives the device a Read-DMA which is
2505 * larger than 2KB by setting the tx.boundary to 2KB. If ECRC is
2506 * enabled, then the driver should use the aligned (myri10ge_eth_z8e.dat)
2507 * firmware image, and set tx.boundary to 4KB.
2510 static void myri10ge_firmware_probe(struct myri10ge_priv *mgp)
2512 struct pci_dev *pdev = mgp->pdev;
2513 struct device *dev = &pdev->dev;
2517 mgp->tx.boundary = 4096;
2519 * Verify the max read request size was set to 4KB
2520 * before trying the test with 4KB.
2522 cap = pci_find_capability(pdev, PCI_CAP_ID_EXP);
2524 dev_err(dev, "Bad PCI_CAP_ID_EXP location %d\n", cap);
2527 status = pci_read_config_word(pdev, cap + PCI_EXP_DEVCTL, &val);
2529 dev_err(dev, "Couldn't read max read req size: %d\n", status);
2532 if ((val & (5 << 12)) != (5 << 12)) {
2533 dev_warn(dev, "Max Read Request size != 4096 (0x%x)\n", val);
2534 mgp->tx.boundary = 2048;
2537 * load the optimized firmware (which assumes aligned PCIe
2538 * completions) in order to see if it works on this host.
2540 mgp->fw_name = myri10ge_fw_aligned;
2541 status = myri10ge_load_firmware(mgp);
2547 * Enable ECRC if possible
2549 myri10ge_enable_ecrc(mgp);
2552 * Run a DMA test which watches for unaligned completions and
2553 * aborts on the first one seen.
2556 status = myri10ge_dma_test(mgp, MXGEFW_CMD_UNALIGNED_TEST);
2558 return; /* keep the aligned firmware */
2560 if (status != -E2BIG)
2561 dev_warn(dev, "DMA test failed: %d\n", status);
2562 if (status == -ENOSYS)
2563 dev_warn(dev, "Falling back to ethp! "
2564 "Please install up to date fw\n");
2566 /* fall back to using the unaligned firmware */
2567 mgp->tx.boundary = 2048;
2568 mgp->fw_name = myri10ge_fw_unaligned;
2572 static void myri10ge_select_firmware(struct myri10ge_priv *mgp)
2574 if (myri10ge_force_firmware == 0) {
2575 int link_width, exp_cap;
2578 exp_cap = pci_find_capability(mgp->pdev, PCI_CAP_ID_EXP);
2579 pci_read_config_word(mgp->pdev, exp_cap + PCI_EXP_LNKSTA, &lnk);
2580 link_width = (lnk >> 4) & 0x3f;
2582 /* Check to see if Link is less than 8 or if the
2583 * upstream bridge is known to provide aligned
2585 if (link_width < 8) {
2586 dev_info(&mgp->pdev->dev, "PCIE x%d Link\n",
2588 mgp->tx.boundary = 4096;
2589 mgp->fw_name = myri10ge_fw_aligned;
2591 myri10ge_firmware_probe(mgp);
2594 if (myri10ge_force_firmware == 1) {
2595 dev_info(&mgp->pdev->dev,
2596 "Assuming aligned completions (forced)\n");
2597 mgp->tx.boundary = 4096;
2598 mgp->fw_name = myri10ge_fw_aligned;
2600 dev_info(&mgp->pdev->dev,
2601 "Assuming unaligned completions (forced)\n");
2602 mgp->tx.boundary = 2048;
2603 mgp->fw_name = myri10ge_fw_unaligned;
2606 if (myri10ge_fw_name != NULL) {
2607 dev_info(&mgp->pdev->dev, "overriding firmware to %s\n",
2609 mgp->fw_name = myri10ge_fw_name;
2615 static int myri10ge_suspend(struct pci_dev *pdev, pm_message_t state)
2617 struct myri10ge_priv *mgp;
2618 struct net_device *netdev;
2620 mgp = pci_get_drvdata(pdev);
2625 netif_device_detach(netdev);
2626 if (netif_running(netdev)) {
2627 printk(KERN_INFO "myri10ge: closing %s\n", netdev->name);
2629 myri10ge_close(netdev);
2632 myri10ge_dummy_rdma(mgp, 0);
2633 pci_save_state(pdev);
2634 pci_disable_device(pdev);
2636 return pci_set_power_state(pdev, pci_choose_state(pdev, state));
2639 static int myri10ge_resume(struct pci_dev *pdev)
2641 struct myri10ge_priv *mgp;
2642 struct net_device *netdev;
2646 mgp = pci_get_drvdata(pdev);
2650 pci_set_power_state(pdev, 0); /* zeros conf space as a side effect */
2651 msleep(5); /* give card time to respond */
2652 pci_read_config_word(mgp->pdev, PCI_VENDOR_ID, &vendor);
2653 if (vendor == 0xffff) {
2654 printk(KERN_ERR "myri10ge: %s: device disappeared!\n",
2659 status = pci_restore_state(pdev);
2663 status = pci_enable_device(pdev);
2665 dev_err(&pdev->dev, "failed to enable device\n");
2669 pci_set_master(pdev);
2671 myri10ge_reset(mgp);
2672 myri10ge_dummy_rdma(mgp, 1);
2674 /* Save configuration space to be restored if the
2675 * nic resets due to a parity error */
2676 pci_save_state(pdev);
2678 if (netif_running(netdev)) {
2680 status = myri10ge_open(netdev);
2683 goto abort_with_enabled;
2686 netif_device_attach(netdev);
2691 pci_disable_device(pdev);
2696 #endif /* CONFIG_PM */
2698 static u32 myri10ge_read_reboot(struct myri10ge_priv *mgp)
2700 struct pci_dev *pdev = mgp->pdev;
2701 int vs = mgp->vendor_specific_offset;
2704 /*enter read32 mode */
2705 pci_write_config_byte(pdev, vs + 0x10, 0x3);
2707 /*read REBOOT_STATUS (0xfffffff0) */
2708 pci_write_config_dword(pdev, vs + 0x18, 0xfffffff0);
2709 pci_read_config_dword(pdev, vs + 0x14, &reboot);
2714 * This watchdog is used to check whether the board has suffered
2715 * from a parity error and needs to be recovered.
2717 static void myri10ge_watchdog(struct work_struct *work)
2719 struct myri10ge_priv *mgp =
2720 container_of(work, struct myri10ge_priv, watchdog_work);
2725 mgp->watchdog_resets++;
2726 pci_read_config_word(mgp->pdev, PCI_COMMAND, &cmd);
2727 if ((cmd & PCI_COMMAND_MASTER) == 0) {
2728 /* Bus master DMA disabled? Check to see
2729 * if the card rebooted due to a parity error
2730 * For now, just report it */
2731 reboot = myri10ge_read_reboot(mgp);
2733 "myri10ge: %s: NIC rebooted (0x%x), resetting\n",
2734 mgp->dev->name, reboot);
2736 * A rebooted nic will come back with config space as
2737 * it was after power was applied to PCIe bus.
2738 * Attempt to restore config space which was saved
2739 * when the driver was loaded, or the last time the
2740 * nic was resumed from power saving mode.
2742 pci_restore_state(mgp->pdev);
2744 /* save state again for accounting reasons */
2745 pci_save_state(mgp->pdev);
2748 /* if we get back -1's from our slot, perhaps somebody
2749 * powered off our card. Don't try to reset it in
2751 if (cmd == 0xffff) {
2752 pci_read_config_word(mgp->pdev, PCI_VENDOR_ID, &vendor);
2753 if (vendor == 0xffff) {
2755 "myri10ge: %s: device disappeared!\n",
2760 /* Perhaps it is a software error. Try to reset */
2762 printk(KERN_ERR "myri10ge: %s: device timeout, resetting\n",
2764 printk(KERN_INFO "myri10ge: %s: %d %d %d %d %d\n",
2765 mgp->dev->name, mgp->tx.req, mgp->tx.done,
2766 mgp->tx.pkt_start, mgp->tx.pkt_done,
2767 (int)ntohl(mgp->fw_stats->send_done_count));
2769 printk(KERN_INFO "myri10ge: %s: %d %d %d %d %d\n",
2770 mgp->dev->name, mgp->tx.req, mgp->tx.done,
2771 mgp->tx.pkt_start, mgp->tx.pkt_done,
2772 (int)ntohl(mgp->fw_stats->send_done_count));
2775 myri10ge_close(mgp->dev);
2776 status = myri10ge_load_firmware(mgp);
2778 printk(KERN_ERR "myri10ge: %s: failed to load firmware\n",
2781 myri10ge_open(mgp->dev);
2786 * We use our own timer routine rather than relying upon
2787 * netdev->tx_timeout because we have a very large hardware transmit
2788 * queue. Due to the large queue, the netdev->tx_timeout function
2789 * cannot detect a NIC with a parity error in a timely fashion if the
2790 * NIC is lightly loaded.
2792 static void myri10ge_watchdog_timer(unsigned long arg)
2794 struct myri10ge_priv *mgp;
2796 mgp = (struct myri10ge_priv *)arg;
2798 if (mgp->rx_small.watchdog_needed) {
2799 myri10ge_alloc_rx_pages(mgp, &mgp->rx_small,
2800 mgp->small_bytes + MXGEFW_PAD, 1);
2801 if (mgp->rx_small.fill_cnt - mgp->rx_small.cnt >=
2802 myri10ge_fill_thresh)
2803 mgp->rx_small.watchdog_needed = 0;
2805 if (mgp->rx_big.watchdog_needed) {
2806 myri10ge_alloc_rx_pages(mgp, &mgp->rx_big, mgp->big_bytes, 1);
2807 if (mgp->rx_big.fill_cnt - mgp->rx_big.cnt >=
2808 myri10ge_fill_thresh)
2809 mgp->rx_big.watchdog_needed = 0;
2812 if (mgp->tx.req != mgp->tx.done &&
2813 mgp->tx.done == mgp->watchdog_tx_done &&
2814 mgp->watchdog_tx_req != mgp->watchdog_tx_done)
2815 /* nic seems like it might be stuck.. */
2816 schedule_work(&mgp->watchdog_work);
2819 mod_timer(&mgp->watchdog_timer,
2820 jiffies + myri10ge_watchdog_timeout * HZ);
2822 mgp->watchdog_tx_done = mgp->tx.done;
2823 mgp->watchdog_tx_req = mgp->tx.req;
2826 static int myri10ge_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2828 struct net_device *netdev;
2829 struct myri10ge_priv *mgp;
2830 struct device *dev = &pdev->dev;
2833 int status = -ENXIO;
2838 netdev = alloc_etherdev(sizeof(*mgp));
2839 if (netdev == NULL) {
2840 dev_err(dev, "Could not allocate ethernet device\n");
2844 mgp = netdev_priv(netdev);
2845 memset(mgp, 0, sizeof(*mgp));
2848 mgp->csum_flag = MXGEFW_FLAGS_CKSUM;
2849 mgp->pause = myri10ge_flow_control;
2850 mgp->intr_coal_delay = myri10ge_intr_coal_delay;
2851 mgp->msg_enable = netif_msg_init(myri10ge_debug, MYRI10GE_MSG_DEFAULT);
2852 init_waitqueue_head(&mgp->down_wq);
2854 if (pci_enable_device(pdev)) {
2855 dev_err(&pdev->dev, "pci_enable_device call failed\n");
2857 goto abort_with_netdev;
2860 /* Find the vendor-specific cap so we can check
2861 * the reboot register later on */
2862 mgp->vendor_specific_offset
2863 = pci_find_capability(pdev, PCI_CAP_ID_VNDR);
2865 /* Set our max read request to 4KB */
2866 cap = pci_find_capability(pdev, PCI_CAP_ID_EXP);
2868 dev_err(&pdev->dev, "Bad PCI_CAP_ID_EXP location %d\n", cap);
2869 goto abort_with_netdev;
2871 status = pci_read_config_word(pdev, cap + PCI_EXP_DEVCTL, &val);
2873 dev_err(&pdev->dev, "Error %d reading PCI_EXP_DEVCTL\n",
2875 goto abort_with_netdev;
2877 val = (val & ~PCI_EXP_DEVCTL_READRQ) | (5 << 12);
2878 status = pci_write_config_word(pdev, cap + PCI_EXP_DEVCTL, val);
2880 dev_err(&pdev->dev, "Error %d writing PCI_EXP_DEVCTL\n",
2882 goto abort_with_netdev;
2885 pci_set_master(pdev);
2887 status = pci_set_dma_mask(pdev, DMA_64BIT_MASK);
2891 "64-bit pci address mask was refused, trying 32-bit");
2892 status = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
2895 dev_err(&pdev->dev, "Error %d setting DMA mask\n", status);
2896 goto abort_with_netdev;
2898 mgp->cmd = dma_alloc_coherent(&pdev->dev, sizeof(*mgp->cmd),
2899 &mgp->cmd_bus, GFP_KERNEL);
2900 if (mgp->cmd == NULL)
2901 goto abort_with_netdev;
2903 mgp->fw_stats = dma_alloc_coherent(&pdev->dev, sizeof(*mgp->fw_stats),
2904 &mgp->fw_stats_bus, GFP_KERNEL);
2905 if (mgp->fw_stats == NULL)
2906 goto abort_with_cmd;
2908 mgp->board_span = pci_resource_len(pdev, 0);
2909 mgp->iomem_base = pci_resource_start(pdev, 0);
2911 mgp->wc_enabled = 0;
2913 mgp->mtrr = mtrr_add(mgp->iomem_base, mgp->board_span,
2914 MTRR_TYPE_WRCOMB, 1);
2916 mgp->wc_enabled = 1;
2918 /* Hack. need to get rid of these magic numbers */
2920 2 * 1024 * 1024 - (2 * (48 * 1024) + (32 * 1024)) - 0x100;
2921 if (mgp->sram_size > mgp->board_span) {
2922 dev_err(&pdev->dev, "board span %ld bytes too small\n",
2926 mgp->sram = ioremap(mgp->iomem_base, mgp->board_span);
2927 if (mgp->sram == NULL) {
2928 dev_err(&pdev->dev, "ioremap failed for %ld bytes at 0x%lx\n",
2929 mgp->board_span, mgp->iomem_base);
2933 memcpy_fromio(mgp->eeprom_strings,
2934 mgp->sram + mgp->sram_size - MYRI10GE_EEPROM_STRINGS_SIZE,
2935 MYRI10GE_EEPROM_STRINGS_SIZE);
2936 memset(mgp->eeprom_strings + MYRI10GE_EEPROM_STRINGS_SIZE - 2, 0, 2);
2937 status = myri10ge_read_mac_addr(mgp);
2939 goto abort_with_ioremap;
2941 for (i = 0; i < ETH_ALEN; i++)
2942 netdev->dev_addr[i] = mgp->mac_addr[i];
2944 /* allocate rx done ring */
2945 bytes = myri10ge_max_intr_slots * sizeof(*mgp->rx_done.entry);
2946 mgp->rx_done.entry = dma_alloc_coherent(&pdev->dev, bytes,
2947 &mgp->rx_done.bus, GFP_KERNEL);
2948 if (mgp->rx_done.entry == NULL)
2949 goto abort_with_ioremap;
2950 memset(mgp->rx_done.entry, 0, bytes);
2952 myri10ge_select_firmware(mgp);
2954 status = myri10ge_load_firmware(mgp);
2956 dev_err(&pdev->dev, "failed to load firmware\n");
2957 goto abort_with_rx_done;
2960 status = myri10ge_reset(mgp);
2962 dev_err(&pdev->dev, "failed reset\n");
2963 goto abort_with_firmware;
2966 pci_set_drvdata(pdev, mgp);
2967 if ((myri10ge_initial_mtu + ETH_HLEN) > MYRI10GE_MAX_ETHER_MTU)
2968 myri10ge_initial_mtu = MYRI10GE_MAX_ETHER_MTU - ETH_HLEN;
2969 if ((myri10ge_initial_mtu + ETH_HLEN) < 68)
2970 myri10ge_initial_mtu = 68;
2971 netdev->mtu = myri10ge_initial_mtu;
2972 netdev->open = myri10ge_open;
2973 netdev->stop = myri10ge_close;
2974 netdev->hard_start_xmit = myri10ge_xmit;
2975 netdev->get_stats = myri10ge_get_stats;
2976 netdev->base_addr = mgp->iomem_base;
2977 netdev->change_mtu = myri10ge_change_mtu;
2978 netdev->set_multicast_list = myri10ge_set_multicast_list;
2979 netdev->set_mac_address = myri10ge_set_mac_address;
2980 netdev->features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_TSO;
2982 netdev->features |= NETIF_F_HIGHDMA;
2983 netdev->poll = myri10ge_poll;
2984 netdev->weight = myri10ge_napi_weight;
2986 /* make sure we can get an irq, and that MSI can be
2987 * setup (if available). Also ensure netdev->irq
2988 * is set to correct value if MSI is enabled */
2989 status = myri10ge_request_irq(mgp);
2991 goto abort_with_firmware;
2992 netdev->irq = pdev->irq;
2993 myri10ge_free_irq(mgp);
2995 /* Save configuration space to be restored if the
2996 * nic resets due to a parity error */
2997 pci_save_state(pdev);
2999 /* Setup the watchdog timer */
3000 setup_timer(&mgp->watchdog_timer, myri10ge_watchdog_timer,
3001 (unsigned long)mgp);
3003 SET_ETHTOOL_OPS(netdev, &myri10ge_ethtool_ops);
3004 INIT_WORK(&mgp->watchdog_work, myri10ge_watchdog);
3005 status = register_netdev(netdev);
3007 dev_err(&pdev->dev, "register_netdev failed: %d\n", status);
3008 goto abort_with_state;
3010 dev_info(dev, "%s IRQ %d, tx bndry %d, fw %s, WC %s\n",
3011 (mgp->msi_enabled ? "MSI" : "xPIC"),
3012 netdev->irq, mgp->tx.boundary, mgp->fw_name,
3013 (mgp->wc_enabled ? "Enabled" : "Disabled"));
3018 pci_restore_state(pdev);
3020 abort_with_firmware:
3021 myri10ge_dummy_rdma(mgp, 0);
3024 bytes = myri10ge_max_intr_slots * sizeof(*mgp->rx_done.entry);
3025 dma_free_coherent(&pdev->dev, bytes,
3026 mgp->rx_done.entry, mgp->rx_done.bus);
3034 mtrr_del(mgp->mtrr, mgp->iomem_base, mgp->board_span);
3036 dma_free_coherent(&pdev->dev, sizeof(*mgp->fw_stats),
3037 mgp->fw_stats, mgp->fw_stats_bus);
3040 dma_free_coherent(&pdev->dev, sizeof(*mgp->cmd),
3041 mgp->cmd, mgp->cmd_bus);
3045 free_netdev(netdev);
3052 * Does what is necessary to shutdown one Myrinet device. Called
3053 * once for each Myrinet card by the kernel when a module is
3056 static void myri10ge_remove(struct pci_dev *pdev)
3058 struct myri10ge_priv *mgp;
3059 struct net_device *netdev;
3062 mgp = pci_get_drvdata(pdev);
3066 flush_scheduled_work();
3068 unregister_netdev(netdev);
3070 myri10ge_dummy_rdma(mgp, 0);
3072 /* avoid a memory leak */
3073 pci_restore_state(pdev);
3075 bytes = myri10ge_max_intr_slots * sizeof(*mgp->rx_done.entry);
3076 dma_free_coherent(&pdev->dev, bytes,
3077 mgp->rx_done.entry, mgp->rx_done.bus);
3083 mtrr_del(mgp->mtrr, mgp->iomem_base, mgp->board_span);
3085 dma_free_coherent(&pdev->dev, sizeof(*mgp->fw_stats),
3086 mgp->fw_stats, mgp->fw_stats_bus);
3088 dma_free_coherent(&pdev->dev, sizeof(*mgp->cmd),
3089 mgp->cmd, mgp->cmd_bus);
3091 free_netdev(netdev);
3092 pci_set_drvdata(pdev, NULL);
3095 #define PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E 0x0008
3097 static struct pci_device_id myri10ge_pci_tbl[] = {
3098 {PCI_DEVICE(PCI_VENDOR_ID_MYRICOM, PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E)},
3102 static struct pci_driver myri10ge_driver = {
3104 .probe = myri10ge_probe,
3105 .remove = myri10ge_remove,
3106 .id_table = myri10ge_pci_tbl,
3108 .suspend = myri10ge_suspend,
3109 .resume = myri10ge_resume,
3113 static __init int myri10ge_init_module(void)
3115 printk(KERN_INFO "%s: Version %s\n", myri10ge_driver.name,
3116 MYRI10GE_VERSION_STR);
3117 return pci_register_driver(&myri10ge_driver);
3120 module_init(myri10ge_init_module);
3122 static __exit void myri10ge_cleanup_module(void)
3124 pci_unregister_driver(&myri10ge_driver);
3127 module_exit(myri10ge_cleanup_module);