1 /*************************************************************************
2 * myri10ge.c: Myricom Myri-10G Ethernet driver.
4 * Copyright (C) 2005 - 2011 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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
43 #include <linux/tcp.h>
44 #include <linux/netdevice.h>
45 #include <linux/skbuff.h>
46 #include <linux/string.h>
47 #include <linux/module.h>
48 #include <linux/pci.h>
49 #include <linux/dma-mapping.h>
50 #include <linux/etherdevice.h>
51 #include <linux/if_ether.h>
52 #include <linux/if_vlan.h>
53 #include <linux/dca.h>
55 #include <linux/inet.h>
57 #include <linux/ethtool.h>
58 #include <linux/firmware.h>
59 #include <linux/delay.h>
60 #include <linux/timer.h>
61 #include <linux/vmalloc.h>
62 #include <linux/crc32.h>
63 #include <linux/moduleparam.h>
65 #include <linux/log2.h>
66 #include <linux/slab.h>
67 #include <linux/prefetch.h>
68 #include <net/checksum.h>
71 #include <asm/byteorder.h>
72 #include <asm/processor.h>
74 #include "myri10ge_mcp.h"
75 #include "myri10ge_mcp_gen_header.h"
77 #define MYRI10GE_VERSION_STR "1.5.3-1.534"
79 MODULE_DESCRIPTION("Myricom 10G driver (10GbE)");
80 MODULE_AUTHOR("Maintainer: help@myri.com");
81 MODULE_VERSION(MYRI10GE_VERSION_STR);
82 MODULE_LICENSE("Dual BSD/GPL");
84 #define MYRI10GE_MAX_ETHER_MTU 9014
86 #define MYRI10GE_ETH_STOPPED 0
87 #define MYRI10GE_ETH_STOPPING 1
88 #define MYRI10GE_ETH_STARTING 2
89 #define MYRI10GE_ETH_RUNNING 3
90 #define MYRI10GE_ETH_OPEN_FAILED 4
92 #define MYRI10GE_EEPROM_STRINGS_SIZE 256
93 #define MYRI10GE_MAX_SEND_DESC_TSO ((65536 / 2048) * 2)
95 #define MYRI10GE_NO_CONFIRM_DATA htonl(0xffffffff)
96 #define MYRI10GE_NO_RESPONSE_RESULT 0xffffffff
98 #define MYRI10GE_ALLOC_ORDER 0
99 #define MYRI10GE_ALLOC_SIZE ((1 << MYRI10GE_ALLOC_ORDER) * PAGE_SIZE)
100 #define MYRI10GE_MAX_FRAGS_PER_FRAME (MYRI10GE_MAX_ETHER_MTU/MYRI10GE_ALLOC_SIZE + 1)
102 #define MYRI10GE_MAX_SLICES 32
104 struct myri10ge_rx_buffer_state {
107 DEFINE_DMA_UNMAP_ADDR(bus);
108 DEFINE_DMA_UNMAP_LEN(len);
111 struct myri10ge_tx_buffer_state {
114 DEFINE_DMA_UNMAP_ADDR(bus);
115 DEFINE_DMA_UNMAP_LEN(len);
118 struct myri10ge_cmd {
124 struct myri10ge_rx_buf {
125 struct mcp_kreq_ether_recv __iomem *lanai; /* lanai ptr for recv ring */
126 struct mcp_kreq_ether_recv *shadow; /* host shadow of recv ring */
127 struct myri10ge_rx_buffer_state *info;
134 int mask; /* number of rx slots -1 */
138 struct myri10ge_tx_buf {
139 struct mcp_kreq_ether_send __iomem *lanai; /* lanai ptr for sendq */
140 __be32 __iomem *send_go; /* "go" doorbell ptr */
141 __be32 __iomem *send_stop; /* "stop" doorbell ptr */
142 struct mcp_kreq_ether_send *req_list; /* host shadow of sendq */
144 struct myri10ge_tx_buffer_state *info;
145 int mask; /* number of transmit slots -1 */
146 int req ____cacheline_aligned; /* transmit slots submitted */
147 int pkt_start; /* packets started */
150 int done ____cacheline_aligned; /* transmit slots completed */
151 int pkt_done; /* packets completed */
156 struct myri10ge_rx_done {
157 struct mcp_slot *entry;
163 struct myri10ge_slice_netstats {
164 unsigned long rx_packets;
165 unsigned long tx_packets;
166 unsigned long rx_bytes;
167 unsigned long tx_bytes;
168 unsigned long rx_dropped;
169 unsigned long tx_dropped;
172 struct myri10ge_slice_state {
173 struct myri10ge_tx_buf tx; /* transmit ring */
174 struct myri10ge_rx_buf rx_small;
175 struct myri10ge_rx_buf rx_big;
176 struct myri10ge_rx_done rx_done;
177 struct net_device *dev;
178 struct napi_struct napi;
179 struct myri10ge_priv *mgp;
180 struct myri10ge_slice_netstats stats;
181 __be32 __iomem *irq_claim;
182 struct mcp_irq_data *fw_stats;
183 dma_addr_t fw_stats_bus;
184 int watchdog_tx_done;
186 int watchdog_rx_done;
188 #ifdef CONFIG_MYRI10GE_DCA
191 __be32 __iomem *dca_tag;
196 struct myri10ge_priv {
197 struct myri10ge_slice_state *ss;
198 int tx_boundary; /* boundary transmits cannot cross */
200 int running; /* running? */
204 struct net_device *dev;
207 unsigned long board_span;
208 unsigned long iomem_base;
209 __be32 __iomem *irq_deassert;
210 char *mac_addr_string;
211 struct mcp_cmd_response *cmd;
213 struct pci_dev *pdev;
216 struct msix_entry *msix_vectors;
217 #ifdef CONFIG_MYRI10GE_DCA
222 unsigned int rdma_tags_available;
224 __be32 __iomem *intr_coal_delay_ptr;
227 wait_queue_head_t down_wq;
228 struct work_struct watchdog_work;
229 struct timer_list watchdog_timer;
233 bool fw_name_allocated;
235 char eeprom_strings[MYRI10GE_EEPROM_STRINGS_SIZE];
236 char *product_code_string;
237 char fw_version[128];
241 int adopted_rx_filter_bug;
242 u8 mac_addr[ETH_ALEN]; /* eeprom mac address */
243 unsigned long serial_number;
244 int vendor_specific_offset;
245 int fw_multicast_support;
253 unsigned int board_number;
257 static char *myri10ge_fw_unaligned = "myri10ge_ethp_z8e.dat";
258 static char *myri10ge_fw_aligned = "myri10ge_eth_z8e.dat";
259 static char *myri10ge_fw_rss_unaligned = "myri10ge_rss_ethp_z8e.dat";
260 static char *myri10ge_fw_rss_aligned = "myri10ge_rss_eth_z8e.dat";
261 MODULE_FIRMWARE("myri10ge_ethp_z8e.dat");
262 MODULE_FIRMWARE("myri10ge_eth_z8e.dat");
263 MODULE_FIRMWARE("myri10ge_rss_ethp_z8e.dat");
264 MODULE_FIRMWARE("myri10ge_rss_eth_z8e.dat");
266 /* Careful: must be accessed under kernel_param_lock() */
267 static char *myri10ge_fw_name = NULL;
268 module_param(myri10ge_fw_name, charp, 0644);
269 MODULE_PARM_DESC(myri10ge_fw_name, "Firmware image name");
271 #define MYRI10GE_MAX_BOARDS 8
272 static char *myri10ge_fw_names[MYRI10GE_MAX_BOARDS] =
273 {[0 ... (MYRI10GE_MAX_BOARDS - 1)] = NULL };
274 module_param_array_named(myri10ge_fw_names, myri10ge_fw_names, charp, NULL,
276 MODULE_PARM_DESC(myri10ge_fw_names, "Firmware image names per board");
278 static int myri10ge_ecrc_enable = 1;
279 module_param(myri10ge_ecrc_enable, int, 0444);
280 MODULE_PARM_DESC(myri10ge_ecrc_enable, "Enable Extended CRC on PCI-E");
282 static int myri10ge_small_bytes = -1; /* -1 == auto */
283 module_param(myri10ge_small_bytes, int, 0644);
284 MODULE_PARM_DESC(myri10ge_small_bytes, "Threshold of small packets");
286 static int myri10ge_msi = 1; /* enable msi by default */
287 module_param(myri10ge_msi, int, 0644);
288 MODULE_PARM_DESC(myri10ge_msi, "Enable Message Signalled Interrupts");
290 static int myri10ge_intr_coal_delay = 75;
291 module_param(myri10ge_intr_coal_delay, int, 0444);
292 MODULE_PARM_DESC(myri10ge_intr_coal_delay, "Interrupt coalescing delay");
294 static int myri10ge_flow_control = 1;
295 module_param(myri10ge_flow_control, int, 0444);
296 MODULE_PARM_DESC(myri10ge_flow_control, "Pause parameter");
298 static int myri10ge_deassert_wait = 1;
299 module_param(myri10ge_deassert_wait, int, 0644);
300 MODULE_PARM_DESC(myri10ge_deassert_wait,
301 "Wait when deasserting legacy interrupts");
303 static int myri10ge_force_firmware = 0;
304 module_param(myri10ge_force_firmware, int, 0444);
305 MODULE_PARM_DESC(myri10ge_force_firmware,
306 "Force firmware to assume aligned completions");
308 static int myri10ge_initial_mtu = MYRI10GE_MAX_ETHER_MTU - ETH_HLEN;
309 module_param(myri10ge_initial_mtu, int, 0444);
310 MODULE_PARM_DESC(myri10ge_initial_mtu, "Initial MTU");
312 static int myri10ge_napi_weight = 64;
313 module_param(myri10ge_napi_weight, int, 0444);
314 MODULE_PARM_DESC(myri10ge_napi_weight, "Set NAPI weight");
316 static int myri10ge_watchdog_timeout = 1;
317 module_param(myri10ge_watchdog_timeout, int, 0444);
318 MODULE_PARM_DESC(myri10ge_watchdog_timeout, "Set watchdog timeout");
320 static int myri10ge_max_irq_loops = 1048576;
321 module_param(myri10ge_max_irq_loops, int, 0444);
322 MODULE_PARM_DESC(myri10ge_max_irq_loops,
323 "Set stuck legacy IRQ detection threshold");
325 #define MYRI10GE_MSG_DEFAULT NETIF_MSG_LINK
327 static int myri10ge_debug = -1; /* defaults above */
328 module_param(myri10ge_debug, int, 0);
329 MODULE_PARM_DESC(myri10ge_debug, "Debug level (0=none,...,16=all)");
331 static int myri10ge_fill_thresh = 256;
332 module_param(myri10ge_fill_thresh, int, 0644);
333 MODULE_PARM_DESC(myri10ge_fill_thresh, "Number of empty rx slots allowed");
335 static int myri10ge_reset_recover = 1;
337 static int myri10ge_max_slices = 1;
338 module_param(myri10ge_max_slices, int, 0444);
339 MODULE_PARM_DESC(myri10ge_max_slices, "Max tx/rx queues");
341 static int myri10ge_rss_hash = MXGEFW_RSS_HASH_TYPE_SRC_DST_PORT;
342 module_param(myri10ge_rss_hash, int, 0444);
343 MODULE_PARM_DESC(myri10ge_rss_hash, "Type of RSS hashing to do");
345 static int myri10ge_dca = 1;
346 module_param(myri10ge_dca, int, 0444);
347 MODULE_PARM_DESC(myri10ge_dca, "Enable DCA if possible");
349 #define MYRI10GE_FW_OFFSET 1024*1024
350 #define MYRI10GE_HIGHPART_TO_U32(X) \
351 (sizeof (X) == 8) ? ((u32)((u64)(X) >> 32)) : (0)
352 #define MYRI10GE_LOWPART_TO_U32(X) ((u32)(X))
354 #define myri10ge_pio_copy(to,from,size) __iowrite64_copy(to,from,size/8)
356 static void myri10ge_set_multicast_list(struct net_device *dev);
357 static netdev_tx_t myri10ge_sw_tso(struct sk_buff *skb,
358 struct net_device *dev);
360 static inline void put_be32(__be32 val, __be32 __iomem * p)
362 __raw_writel((__force __u32) val, (__force void __iomem *)p);
365 static void myri10ge_get_stats(struct net_device *dev,
366 struct rtnl_link_stats64 *stats);
368 static void set_fw_name(struct myri10ge_priv *mgp, char *name, bool allocated)
370 if (mgp->fw_name_allocated)
373 mgp->fw_name_allocated = allocated;
377 myri10ge_send_cmd(struct myri10ge_priv *mgp, u32 cmd,
378 struct myri10ge_cmd *data, int atomic)
381 char buf_bytes[sizeof(*buf) + 8];
382 struct mcp_cmd_response *response = mgp->cmd;
383 char __iomem *cmd_addr = mgp->sram + MXGEFW_ETH_CMD;
384 u32 dma_low, dma_high, result, value;
387 /* ensure buf is aligned to 8 bytes */
388 buf = (struct mcp_cmd *)ALIGN((unsigned long)buf_bytes, 8);
390 buf->data0 = htonl(data->data0);
391 buf->data1 = htonl(data->data1);
392 buf->data2 = htonl(data->data2);
393 buf->cmd = htonl(cmd);
394 dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
395 dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
397 buf->response_addr.low = htonl(dma_low);
398 buf->response_addr.high = htonl(dma_high);
399 response->result = htonl(MYRI10GE_NO_RESPONSE_RESULT);
401 myri10ge_pio_copy(cmd_addr, buf, sizeof(*buf));
403 /* wait up to 15ms. Longest command is the DMA benchmark,
404 * which is capped at 5ms, but runs from a timeout handler
405 * that runs every 7.8ms. So a 15ms timeout leaves us with
409 /* if atomic is set, do not sleep,
410 * and try to get the completion quickly
411 * (1ms will be enough for those commands) */
412 for (sleep_total = 0;
413 sleep_total < 1000 &&
414 response->result == htonl(MYRI10GE_NO_RESPONSE_RESULT);
420 /* use msleep for most command */
421 for (sleep_total = 0;
423 response->result == htonl(MYRI10GE_NO_RESPONSE_RESULT);
428 result = ntohl(response->result);
429 value = ntohl(response->data);
430 if (result != MYRI10GE_NO_RESPONSE_RESULT) {
434 } else if (result == MXGEFW_CMD_UNKNOWN) {
436 } else if (result == MXGEFW_CMD_ERROR_UNALIGNED) {
438 } else if (result == MXGEFW_CMD_ERROR_RANGE &&
439 cmd == MXGEFW_CMD_ENABLE_RSS_QUEUES &&
441 data1 & MXGEFW_SLICE_ENABLE_MULTIPLE_TX_QUEUES) !=
445 dev_err(&mgp->pdev->dev,
446 "command %d failed, result = %d\n",
452 dev_err(&mgp->pdev->dev, "command %d timed out, result = %d\n",
458 * The eeprom strings on the lanaiX have the format
461 * PT:ddd mmm xx xx:xx:xx xx\0
462 * PV:ddd mmm xx xx:xx:xx xx\0
464 static int myri10ge_read_mac_addr(struct myri10ge_priv *mgp)
469 ptr = mgp->eeprom_strings;
470 limit = mgp->eeprom_strings + MYRI10GE_EEPROM_STRINGS_SIZE;
472 while (*ptr != '\0' && ptr < limit) {
473 if (memcmp(ptr, "MAC=", 4) == 0) {
475 mgp->mac_addr_string = ptr;
476 for (i = 0; i < 6; i++) {
477 if ((ptr + 2) > limit)
480 simple_strtoul(ptr, &ptr, 16);
484 if (memcmp(ptr, "PC=", 3) == 0) {
486 mgp->product_code_string = ptr;
488 if (memcmp((const void *)ptr, "SN=", 3) == 0) {
490 mgp->serial_number = simple_strtoul(ptr, &ptr, 10);
492 while (ptr < limit && *ptr++) ;
498 dev_err(&mgp->pdev->dev, "failed to parse eeprom_strings\n");
503 * Enable or disable periodic RDMAs from the host to make certain
504 * chipsets resend dropped PCIe messages
507 static void myri10ge_dummy_rdma(struct myri10ge_priv *mgp, int enable)
509 char __iomem *submit;
510 __be32 buf[16] __attribute__ ((__aligned__(8)));
511 u32 dma_low, dma_high;
514 /* clear confirmation addr */
518 /* send a rdma command to the PCIe engine, and wait for the
519 * response in the confirmation address. The firmware should
520 * write a -1 there to indicate it is alive and well
522 dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
523 dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
525 buf[0] = htonl(dma_high); /* confirm addr MSW */
526 buf[1] = htonl(dma_low); /* confirm addr LSW */
527 buf[2] = MYRI10GE_NO_CONFIRM_DATA; /* confirm data */
528 buf[3] = htonl(dma_high); /* dummy addr MSW */
529 buf[4] = htonl(dma_low); /* dummy addr LSW */
530 buf[5] = htonl(enable); /* enable? */
532 submit = mgp->sram + MXGEFW_BOOT_DUMMY_RDMA;
534 myri10ge_pio_copy(submit, &buf, sizeof(buf));
535 for (i = 0; mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA && i < 20; i++)
537 if (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA)
538 dev_err(&mgp->pdev->dev, "dummy rdma %s failed\n",
539 (enable ? "enable" : "disable"));
543 myri10ge_validate_firmware(struct myri10ge_priv *mgp,
544 struct mcp_gen_header *hdr)
546 struct device *dev = &mgp->pdev->dev;
548 /* check firmware type */
549 if (ntohl(hdr->mcp_type) != MCP_TYPE_ETH) {
550 dev_err(dev, "Bad firmware type: 0x%x\n", ntohl(hdr->mcp_type));
554 /* save firmware version for ethtool */
555 strncpy(mgp->fw_version, hdr->version, sizeof(mgp->fw_version));
556 mgp->fw_version[sizeof(mgp->fw_version) - 1] = '\0';
558 sscanf(mgp->fw_version, "%d.%d.%d", &mgp->fw_ver_major,
559 &mgp->fw_ver_minor, &mgp->fw_ver_tiny);
561 if (!(mgp->fw_ver_major == MXGEFW_VERSION_MAJOR &&
562 mgp->fw_ver_minor == MXGEFW_VERSION_MINOR)) {
563 dev_err(dev, "Found firmware version %s\n", mgp->fw_version);
564 dev_err(dev, "Driver needs %d.%d\n", MXGEFW_VERSION_MAJOR,
565 MXGEFW_VERSION_MINOR);
571 static int myri10ge_load_hotplug_firmware(struct myri10ge_priv *mgp, u32 * size)
573 unsigned crc, reread_crc;
574 const struct firmware *fw;
575 struct device *dev = &mgp->pdev->dev;
576 unsigned char *fw_readback;
577 struct mcp_gen_header *hdr;
582 if ((status = request_firmware(&fw, mgp->fw_name, dev)) < 0) {
583 dev_err(dev, "Unable to load %s firmware image via hotplug\n",
586 goto abort_with_nothing;
591 if (fw->size >= mgp->sram_size - MYRI10GE_FW_OFFSET ||
592 fw->size < MCP_HEADER_PTR_OFFSET + 4) {
593 dev_err(dev, "Firmware size invalid:%d\n", (int)fw->size);
599 hdr_offset = ntohl(*(__be32 *) (fw->data + MCP_HEADER_PTR_OFFSET));
600 if ((hdr_offset & 3) || hdr_offset + sizeof(*hdr) > fw->size) {
601 dev_err(dev, "Bad firmware file\n");
605 hdr = (void *)(fw->data + hdr_offset);
607 status = myri10ge_validate_firmware(mgp, hdr);
611 crc = crc32(~0, fw->data, fw->size);
612 for (i = 0; i < fw->size; i += 256) {
613 myri10ge_pio_copy(mgp->sram + MYRI10GE_FW_OFFSET + i,
615 min(256U, (unsigned)(fw->size - i)));
619 fw_readback = vmalloc(fw->size);
624 /* corruption checking is good for parity recovery and buggy chipset */
625 memcpy_fromio(fw_readback, mgp->sram + MYRI10GE_FW_OFFSET, fw->size);
626 reread_crc = crc32(~0, fw_readback, fw->size);
628 if (crc != reread_crc) {
629 dev_err(dev, "CRC failed(fw-len=%u), got 0x%x (expect 0x%x)\n",
630 (unsigned)fw->size, reread_crc, crc);
634 *size = (u32) fw->size;
637 release_firmware(fw);
643 static int myri10ge_adopt_running_firmware(struct myri10ge_priv *mgp)
645 struct mcp_gen_header *hdr;
646 struct device *dev = &mgp->pdev->dev;
647 const size_t bytes = sizeof(struct mcp_gen_header);
651 /* find running firmware header */
652 hdr_offset = swab32(readl(mgp->sram + MCP_HEADER_PTR_OFFSET));
654 if ((hdr_offset & 3) || hdr_offset + sizeof(*hdr) > mgp->sram_size) {
655 dev_err(dev, "Running firmware has bad header offset (%d)\n",
660 /* copy header of running firmware from SRAM to host memory to
661 * validate firmware */
662 hdr = kmalloc(bytes, GFP_KERNEL);
666 memcpy_fromio(hdr, mgp->sram + hdr_offset, bytes);
667 status = myri10ge_validate_firmware(mgp, hdr);
670 /* check to see if adopted firmware has bug where adopting
671 * it will cause broadcasts to be filtered unless the NIC
672 * is kept in ALLMULTI mode */
673 if (mgp->fw_ver_major == 1 && mgp->fw_ver_minor == 4 &&
674 mgp->fw_ver_tiny >= 4 && mgp->fw_ver_tiny <= 11) {
675 mgp->adopted_rx_filter_bug = 1;
676 dev_warn(dev, "Adopting fw %d.%d.%d: "
677 "working around rx filter bug\n",
678 mgp->fw_ver_major, mgp->fw_ver_minor,
684 static int myri10ge_get_firmware_capabilities(struct myri10ge_priv *mgp)
686 struct myri10ge_cmd cmd;
689 /* probe for IPv6 TSO support */
690 mgp->features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_TSO;
691 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_TSO6_HDR_SIZE,
694 mgp->max_tso6 = cmd.data0;
695 mgp->features |= NETIF_F_TSO6;
698 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_RX_RING_SIZE, &cmd, 0);
700 dev_err(&mgp->pdev->dev,
701 "failed MXGEFW_CMD_GET_RX_RING_SIZE\n");
705 mgp->max_intr_slots = 2 * (cmd.data0 / sizeof(struct mcp_dma_addr));
710 static int myri10ge_load_firmware(struct myri10ge_priv *mgp, int adopt)
712 char __iomem *submit;
713 __be32 buf[16] __attribute__ ((__aligned__(8)));
714 u32 dma_low, dma_high, size;
718 status = myri10ge_load_hotplug_firmware(mgp, &size);
722 dev_warn(&mgp->pdev->dev, "hotplug firmware loading failed\n");
724 /* Do not attempt to adopt firmware if there
729 status = myri10ge_adopt_running_firmware(mgp);
731 dev_err(&mgp->pdev->dev,
732 "failed to adopt running firmware\n");
735 dev_info(&mgp->pdev->dev,
736 "Successfully adopted running firmware\n");
737 if (mgp->tx_boundary == 4096) {
738 dev_warn(&mgp->pdev->dev,
739 "Using firmware currently running on NIC"
741 dev_warn(&mgp->pdev->dev,
742 "performance consider loading optimized "
744 dev_warn(&mgp->pdev->dev, "via hotplug\n");
747 set_fw_name(mgp, "adopted", false);
748 mgp->tx_boundary = 2048;
749 myri10ge_dummy_rdma(mgp, 1);
750 status = myri10ge_get_firmware_capabilities(mgp);
754 /* clear confirmation addr */
758 /* send a reload command to the bootstrap MCP, and wait for the
759 * response in the confirmation address. The firmware should
760 * write a -1 there to indicate it is alive and well
762 dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
763 dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
765 buf[0] = htonl(dma_high); /* confirm addr MSW */
766 buf[1] = htonl(dma_low); /* confirm addr LSW */
767 buf[2] = MYRI10GE_NO_CONFIRM_DATA; /* confirm data */
769 /* FIX: All newest firmware should un-protect the bottom of
770 * the sram before handoff. However, the very first interfaces
771 * do not. Therefore the handoff copy must skip the first 8 bytes
773 buf[3] = htonl(MYRI10GE_FW_OFFSET + 8); /* where the code starts */
774 buf[4] = htonl(size - 8); /* length of code */
775 buf[5] = htonl(8); /* where to copy to */
776 buf[6] = htonl(0); /* where to jump to */
778 submit = mgp->sram + MXGEFW_BOOT_HANDOFF;
780 myri10ge_pio_copy(submit, &buf, sizeof(buf));
785 while (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA && i < 9) {
789 if (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA) {
790 dev_err(&mgp->pdev->dev, "handoff failed\n");
793 myri10ge_dummy_rdma(mgp, 1);
794 status = myri10ge_get_firmware_capabilities(mgp);
799 static int myri10ge_update_mac_address(struct myri10ge_priv *mgp,
802 struct myri10ge_cmd cmd;
805 cmd.data0 = ((addr[0] << 24) | (addr[1] << 16)
806 | (addr[2] << 8) | addr[3]);
808 cmd.data1 = ((addr[4] << 8) | (addr[5]));
810 status = myri10ge_send_cmd(mgp, MXGEFW_SET_MAC_ADDRESS, &cmd, 0);
814 static int myri10ge_change_pause(struct myri10ge_priv *mgp, int pause)
816 struct myri10ge_cmd cmd;
819 ctl = pause ? MXGEFW_ENABLE_FLOW_CONTROL : MXGEFW_DISABLE_FLOW_CONTROL;
820 status = myri10ge_send_cmd(mgp, ctl, &cmd, 0);
823 netdev_err(mgp->dev, "Failed to set flow control mode\n");
831 myri10ge_change_promisc(struct myri10ge_priv *mgp, int promisc, int atomic)
833 struct myri10ge_cmd cmd;
836 ctl = promisc ? MXGEFW_ENABLE_PROMISC : MXGEFW_DISABLE_PROMISC;
837 status = myri10ge_send_cmd(mgp, ctl, &cmd, atomic);
839 netdev_err(mgp->dev, "Failed to set promisc mode\n");
842 static int myri10ge_dma_test(struct myri10ge_priv *mgp, int test_type)
844 struct myri10ge_cmd cmd;
847 struct page *dmatest_page;
848 dma_addr_t dmatest_bus;
851 dmatest_page = alloc_page(GFP_KERNEL);
854 dmatest_bus = dma_map_page(&mgp->pdev->dev, dmatest_page, 0,
855 PAGE_SIZE, DMA_BIDIRECTIONAL);
856 if (unlikely(dma_mapping_error(&mgp->pdev->dev, dmatest_bus))) {
857 __free_page(dmatest_page);
861 /* Run a small DMA test.
862 * The magic multipliers to the length tell the firmware
863 * to do DMA read, write, or read+write tests. The
864 * results are returned in cmd.data0. The upper 16
865 * bits or the return is the number of transfers completed.
866 * The lower 16 bits is the time in 0.5us ticks that the
867 * transfers took to complete.
870 len = mgp->tx_boundary;
872 cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus);
873 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus);
874 cmd.data2 = len * 0x10000;
875 status = myri10ge_send_cmd(mgp, test_type, &cmd, 0);
880 mgp->read_dma = ((cmd.data0 >> 16) * len * 2) / (cmd.data0 & 0xffff);
881 cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus);
882 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus);
883 cmd.data2 = len * 0x1;
884 status = myri10ge_send_cmd(mgp, test_type, &cmd, 0);
889 mgp->write_dma = ((cmd.data0 >> 16) * len * 2) / (cmd.data0 & 0xffff);
891 cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus);
892 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus);
893 cmd.data2 = len * 0x10001;
894 status = myri10ge_send_cmd(mgp, test_type, &cmd, 0);
899 mgp->read_write_dma = ((cmd.data0 >> 16) * len * 2 * 2) /
900 (cmd.data0 & 0xffff);
903 dma_unmap_page(&mgp->pdev->dev, dmatest_bus, PAGE_SIZE,
905 put_page(dmatest_page);
907 if (status != 0 && test_type != MXGEFW_CMD_UNALIGNED_TEST)
908 dev_warn(&mgp->pdev->dev, "DMA %s benchmark failed: %d\n",
914 static int myri10ge_reset(struct myri10ge_priv *mgp)
916 struct myri10ge_cmd cmd;
917 struct myri10ge_slice_state *ss;
920 #ifdef CONFIG_MYRI10GE_DCA
921 unsigned long dca_tag_off;
924 /* try to send a reset command to the card to see if it
926 memset(&cmd, 0, sizeof(cmd));
927 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_RESET, &cmd, 0);
929 dev_err(&mgp->pdev->dev, "failed reset\n");
933 (void)myri10ge_dma_test(mgp, MXGEFW_DMA_TEST);
935 * Use non-ndis mcp_slot (eg, 4 bytes total,
936 * no toeplitz hash value returned. Older firmware will
937 * not understand this command, but will use the correct
938 * sized mcp_slot, so we ignore error returns
940 cmd.data0 = MXGEFW_RSS_MCP_SLOT_TYPE_MIN;
941 (void)myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_MCP_SLOT_TYPE, &cmd, 0);
943 /* Now exchange information about interrupts */
945 bytes = mgp->max_intr_slots * sizeof(*mgp->ss[0].rx_done.entry);
946 cmd.data0 = (u32) bytes;
947 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_SIZE, &cmd, 0);
950 * Even though we already know how many slices are supported
951 * via myri10ge_probe_slices() MXGEFW_CMD_GET_MAX_RSS_QUEUES
952 * has magic side effects, and must be called after a reset.
953 * It must be called prior to calling any RSS related cmds,
954 * including assigning an interrupt queue for anything but
955 * slice 0. It must also be called *after*
956 * MXGEFW_CMD_SET_INTRQ_SIZE, since the intrq size is used by
957 * the firmware to compute offsets.
960 if (mgp->num_slices > 1) {
962 /* ask the maximum number of slices it supports */
963 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_RSS_QUEUES,
966 dev_err(&mgp->pdev->dev,
967 "failed to get number of slices\n");
971 * MXGEFW_CMD_ENABLE_RSS_QUEUES must be called prior
972 * to setting up the interrupt queue DMA
975 cmd.data0 = mgp->num_slices;
976 cmd.data1 = MXGEFW_SLICE_INTR_MODE_ONE_PER_SLICE;
977 if (mgp->dev->real_num_tx_queues > 1)
978 cmd.data1 |= MXGEFW_SLICE_ENABLE_MULTIPLE_TX_QUEUES;
979 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ENABLE_RSS_QUEUES,
982 /* Firmware older than 1.4.32 only supports multiple
983 * RX queues, so if we get an error, first retry using a
984 * single TX queue before giving up */
985 if (status != 0 && mgp->dev->real_num_tx_queues > 1) {
986 netif_set_real_num_tx_queues(mgp->dev, 1);
987 cmd.data0 = mgp->num_slices;
988 cmd.data1 = MXGEFW_SLICE_INTR_MODE_ONE_PER_SLICE;
989 status = myri10ge_send_cmd(mgp,
990 MXGEFW_CMD_ENABLE_RSS_QUEUES,
995 dev_err(&mgp->pdev->dev,
996 "failed to set number of slices\n");
1001 for (i = 0; i < mgp->num_slices; i++) {
1003 cmd.data0 = MYRI10GE_LOWPART_TO_U32(ss->rx_done.bus);
1004 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(ss->rx_done.bus);
1006 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_DMA,
1011 myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_IRQ_ACK_OFFSET, &cmd, 0);
1012 for (i = 0; i < mgp->num_slices; i++) {
1015 (__iomem __be32 *) (mgp->sram + cmd.data0 + 8 * i);
1017 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_IRQ_DEASSERT_OFFSET,
1019 mgp->irq_deassert = (__iomem __be32 *) (mgp->sram + cmd.data0);
1021 status |= myri10ge_send_cmd
1022 (mgp, MXGEFW_CMD_GET_INTR_COAL_DELAY_OFFSET, &cmd, 0);
1023 mgp->intr_coal_delay_ptr = (__iomem __be32 *) (mgp->sram + cmd.data0);
1025 dev_err(&mgp->pdev->dev, "failed set interrupt parameters\n");
1028 put_be32(htonl(mgp->intr_coal_delay), mgp->intr_coal_delay_ptr);
1030 #ifdef CONFIG_MYRI10GE_DCA
1031 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_DCA_OFFSET, &cmd, 0);
1032 dca_tag_off = cmd.data0;
1033 for (i = 0; i < mgp->num_slices; i++) {
1036 ss->dca_tag = (__iomem __be32 *)
1037 (mgp->sram + dca_tag_off + 4 * i);
1042 #endif /* CONFIG_MYRI10GE_DCA */
1044 /* reset mcp/driver shared state back to 0 */
1046 mgp->link_changes = 0;
1047 for (i = 0; i < mgp->num_slices; i++) {
1050 memset(ss->rx_done.entry, 0, bytes);
1053 ss->tx.pkt_start = 0;
1054 ss->tx.pkt_done = 0;
1056 ss->rx_small.cnt = 0;
1057 ss->rx_done.idx = 0;
1058 ss->rx_done.cnt = 0;
1059 ss->tx.wake_queue = 0;
1060 ss->tx.stop_queue = 0;
1063 status = myri10ge_update_mac_address(mgp, mgp->dev->dev_addr);
1064 myri10ge_change_pause(mgp, mgp->pause);
1065 myri10ge_set_multicast_list(mgp->dev);
1069 #ifdef CONFIG_MYRI10GE_DCA
1070 static int myri10ge_toggle_relaxed(struct pci_dev *pdev, int on)
1075 pcie_capability_read_word(pdev, PCI_EXP_DEVCTL, &ctl);
1077 ret = (ctl & PCI_EXP_DEVCTL_RELAX_EN) >> 4;
1079 ctl &= ~PCI_EXP_DEVCTL_RELAX_EN;
1081 pcie_capability_write_word(pdev, PCI_EXP_DEVCTL, ctl);
1087 myri10ge_write_dca(struct myri10ge_slice_state *ss, int cpu, int tag)
1089 ss->cached_dca_tag = tag;
1090 put_be32(htonl(tag), ss->dca_tag);
1093 static inline void myri10ge_update_dca(struct myri10ge_slice_state *ss)
1095 int cpu = get_cpu();
1098 if (cpu != ss->cpu) {
1099 tag = dca3_get_tag(&ss->mgp->pdev->dev, cpu);
1100 if (ss->cached_dca_tag != tag)
1101 myri10ge_write_dca(ss, cpu, tag);
1107 static void myri10ge_setup_dca(struct myri10ge_priv *mgp)
1110 struct pci_dev *pdev = mgp->pdev;
1112 if (mgp->ss[0].dca_tag == NULL || mgp->dca_enabled)
1114 if (!myri10ge_dca) {
1115 dev_err(&pdev->dev, "dca disabled by administrator\n");
1118 err = dca_add_requester(&pdev->dev);
1122 "dca_add_requester() failed, err=%d\n", err);
1125 mgp->relaxed_order = myri10ge_toggle_relaxed(pdev, 0);
1126 mgp->dca_enabled = 1;
1127 for (i = 0; i < mgp->num_slices; i++) {
1128 mgp->ss[i].cpu = -1;
1129 mgp->ss[i].cached_dca_tag = -1;
1130 myri10ge_update_dca(&mgp->ss[i]);
1134 static void myri10ge_teardown_dca(struct myri10ge_priv *mgp)
1136 struct pci_dev *pdev = mgp->pdev;
1138 if (!mgp->dca_enabled)
1140 mgp->dca_enabled = 0;
1141 if (mgp->relaxed_order)
1142 myri10ge_toggle_relaxed(pdev, 1);
1143 dca_remove_requester(&pdev->dev);
1146 static int myri10ge_notify_dca_device(struct device *dev, void *data)
1148 struct myri10ge_priv *mgp;
1149 unsigned long event;
1151 mgp = dev_get_drvdata(dev);
1152 event = *(unsigned long *)data;
1154 if (event == DCA_PROVIDER_ADD)
1155 myri10ge_setup_dca(mgp);
1156 else if (event == DCA_PROVIDER_REMOVE)
1157 myri10ge_teardown_dca(mgp);
1160 #endif /* CONFIG_MYRI10GE_DCA */
1163 myri10ge_submit_8rx(struct mcp_kreq_ether_recv __iomem * dst,
1164 struct mcp_kreq_ether_recv *src)
1168 low = src->addr_low;
1169 src->addr_low = htonl(DMA_BIT_MASK(32));
1170 myri10ge_pio_copy(dst, src, 4 * sizeof(*src));
1172 myri10ge_pio_copy(dst + 4, src + 4, 4 * sizeof(*src));
1174 src->addr_low = low;
1175 put_be32(low, &dst->addr_low);
1180 myri10ge_alloc_rx_pages(struct myri10ge_priv *mgp, struct myri10ge_rx_buf *rx,
1181 int bytes, int watchdog)
1186 #if MYRI10GE_ALLOC_SIZE > 4096
1190 if (unlikely(rx->watchdog_needed && !watchdog))
1193 /* try to refill entire ring */
1194 while (rx->fill_cnt != (rx->cnt + rx->mask + 1)) {
1195 idx = rx->fill_cnt & rx->mask;
1196 if (rx->page_offset + bytes <= MYRI10GE_ALLOC_SIZE) {
1197 /* we can use part of previous page */
1200 /* we need a new page */
1202 alloc_pages(GFP_ATOMIC | __GFP_COMP,
1203 MYRI10GE_ALLOC_ORDER);
1204 if (unlikely(page == NULL)) {
1205 if (rx->fill_cnt - rx->cnt < 16)
1206 rx->watchdog_needed = 1;
1210 bus = dma_map_page(&mgp->pdev->dev, page, 0,
1211 MYRI10GE_ALLOC_SIZE,
1213 if (unlikely(dma_mapping_error(&mgp->pdev->dev, bus))) {
1214 __free_pages(page, MYRI10GE_ALLOC_ORDER);
1215 if (rx->fill_cnt - rx->cnt < 16)
1216 rx->watchdog_needed = 1;
1221 rx->page_offset = 0;
1225 rx->info[idx].page = rx->page;
1226 rx->info[idx].page_offset = rx->page_offset;
1227 /* note that this is the address of the start of the
1229 dma_unmap_addr_set(&rx->info[idx], bus, rx->bus);
1230 rx->shadow[idx].addr_low =
1231 htonl(MYRI10GE_LOWPART_TO_U32(rx->bus) + rx->page_offset);
1232 rx->shadow[idx].addr_high =
1233 htonl(MYRI10GE_HIGHPART_TO_U32(rx->bus));
1235 /* start next packet on a cacheline boundary */
1236 rx->page_offset += SKB_DATA_ALIGN(bytes);
1238 #if MYRI10GE_ALLOC_SIZE > 4096
1239 /* don't cross a 4KB boundary */
1240 end_offset = rx->page_offset + bytes - 1;
1241 if ((unsigned)(rx->page_offset ^ end_offset) > 4095)
1242 rx->page_offset = end_offset & ~4095;
1246 /* copy 8 descriptors to the firmware at a time */
1247 if ((idx & 7) == 7) {
1248 myri10ge_submit_8rx(&rx->lanai[idx - 7],
1249 &rx->shadow[idx - 7]);
1255 myri10ge_unmap_rx_page(struct pci_dev *pdev,
1256 struct myri10ge_rx_buffer_state *info, int bytes)
1258 /* unmap the recvd page if we're the only or last user of it */
1259 if (bytes >= MYRI10GE_ALLOC_SIZE / 2 ||
1260 (info->page_offset + 2 * bytes) > MYRI10GE_ALLOC_SIZE) {
1261 dma_unmap_page(&pdev->dev, (dma_unmap_addr(info, bus)
1262 & ~(MYRI10GE_ALLOC_SIZE - 1)),
1263 MYRI10GE_ALLOC_SIZE, DMA_FROM_DEVICE);
1268 * GRO does not support acceleration of tagged vlan frames, and
1269 * this NIC does not support vlan tag offload, so we must pop
1270 * the tag ourselves to be able to achieve GRO performance that
1271 * is comparable to LRO.
1275 myri10ge_vlan_rx(struct net_device *dev, void *addr, struct sk_buff *skb)
1278 struct vlan_ethhdr *veh;
1284 veh = (struct vlan_ethhdr *)va;
1285 if ((dev->features & NETIF_F_HW_VLAN_CTAG_RX) ==
1286 NETIF_F_HW_VLAN_CTAG_RX &&
1287 veh->h_vlan_proto == htons(ETH_P_8021Q)) {
1288 /* fixup csum if needed */
1289 if (skb->ip_summed == CHECKSUM_COMPLETE) {
1290 vsum = csum_partial(va + ETH_HLEN, VLAN_HLEN, 0);
1291 skb->csum = csum_sub(skb->csum, vsum);
1294 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), ntohs(veh->h_vlan_TCI));
1295 memmove(va + VLAN_HLEN, va, 2 * ETH_ALEN);
1296 skb->len -= VLAN_HLEN;
1297 skb->data_len -= VLAN_HLEN;
1298 frag = skb_shinfo(skb)->frags;
1299 skb_frag_off_add(frag, VLAN_HLEN);
1300 skb_frag_size_sub(frag, VLAN_HLEN);
1304 #define MYRI10GE_HLEN 64 /* Bytes to copy from page to skb linear memory */
1307 myri10ge_rx_done(struct myri10ge_slice_state *ss, int len, __wsum csum)
1309 struct myri10ge_priv *mgp = ss->mgp;
1310 struct sk_buff *skb;
1311 skb_frag_t *rx_frags;
1312 struct myri10ge_rx_buf *rx;
1313 int i, idx, remainder, bytes;
1314 struct pci_dev *pdev = mgp->pdev;
1315 struct net_device *dev = mgp->dev;
1318 if (len <= mgp->small_bytes) {
1320 bytes = mgp->small_bytes;
1323 bytes = mgp->big_bytes;
1327 idx = rx->cnt & rx->mask;
1328 va = page_address(rx->info[idx].page) + rx->info[idx].page_offset;
1331 skb = napi_get_frags(&ss->napi);
1332 if (unlikely(skb == NULL)) {
1333 ss->stats.rx_dropped++;
1334 for (i = 0, remainder = len; remainder > 0; i++) {
1335 myri10ge_unmap_rx_page(pdev, &rx->info[idx], bytes);
1336 put_page(rx->info[idx].page);
1338 idx = rx->cnt & rx->mask;
1339 remainder -= MYRI10GE_ALLOC_SIZE;
1343 rx_frags = skb_shinfo(skb)->frags;
1344 /* Fill skb_frag_t(s) with data from our receive */
1345 for (i = 0, remainder = len; remainder > 0; i++) {
1346 myri10ge_unmap_rx_page(pdev, &rx->info[idx], bytes);
1347 skb_fill_page_desc(skb, i, rx->info[idx].page,
1348 rx->info[idx].page_offset,
1349 remainder < MYRI10GE_ALLOC_SIZE ?
1350 remainder : MYRI10GE_ALLOC_SIZE);
1352 idx = rx->cnt & rx->mask;
1353 remainder -= MYRI10GE_ALLOC_SIZE;
1356 /* remove padding */
1357 skb_frag_off_add(&rx_frags[0], MXGEFW_PAD);
1358 skb_frag_size_sub(&rx_frags[0], MXGEFW_PAD);
1362 skb->data_len = len;
1363 skb->truesize += len;
1364 if (dev->features & NETIF_F_RXCSUM) {
1365 skb->ip_summed = CHECKSUM_COMPLETE;
1368 myri10ge_vlan_rx(mgp->dev, va, skb);
1369 skb_record_rx_queue(skb, ss - &mgp->ss[0]);
1371 napi_gro_frags(&ss->napi);
1377 myri10ge_tx_done(struct myri10ge_slice_state *ss, int mcp_index)
1379 struct pci_dev *pdev = ss->mgp->pdev;
1380 struct myri10ge_tx_buf *tx = &ss->tx;
1381 struct netdev_queue *dev_queue;
1382 struct sk_buff *skb;
1385 while (tx->pkt_done != mcp_index) {
1386 idx = tx->done & tx->mask;
1387 skb = tx->info[idx].skb;
1390 tx->info[idx].skb = NULL;
1391 if (tx->info[idx].last) {
1393 tx->info[idx].last = 0;
1396 len = dma_unmap_len(&tx->info[idx], len);
1397 dma_unmap_len_set(&tx->info[idx], len, 0);
1399 ss->stats.tx_bytes += skb->len;
1400 ss->stats.tx_packets++;
1401 dev_consume_skb_irq(skb);
1403 dma_unmap_single(&pdev->dev,
1404 dma_unmap_addr(&tx->info[idx],
1409 dma_unmap_page(&pdev->dev,
1410 dma_unmap_addr(&tx->info[idx],
1416 dev_queue = netdev_get_tx_queue(ss->dev, ss - ss->mgp->ss);
1418 * Make a minimal effort to prevent the NIC from polling an
1419 * idle tx queue. If we can't get the lock we leave the queue
1420 * active. In this case, either a thread was about to start
1421 * using the queue anyway, or we lost a race and the NIC will
1422 * waste some of its resources polling an inactive queue for a
1426 if ((ss->mgp->dev->real_num_tx_queues > 1) &&
1427 __netif_tx_trylock(dev_queue)) {
1428 if (tx->req == tx->done) {
1429 tx->queue_active = 0;
1430 put_be32(htonl(1), tx->send_stop);
1433 __netif_tx_unlock(dev_queue);
1436 /* start the queue if we've stopped it */
1437 if (netif_tx_queue_stopped(dev_queue) &&
1438 tx->req - tx->done < (tx->mask >> 1) &&
1439 ss->mgp->running == MYRI10GE_ETH_RUNNING) {
1441 netif_tx_wake_queue(dev_queue);
1446 myri10ge_clean_rx_done(struct myri10ge_slice_state *ss, int budget)
1448 struct myri10ge_rx_done *rx_done = &ss->rx_done;
1449 struct myri10ge_priv *mgp = ss->mgp;
1450 unsigned long rx_bytes = 0;
1451 unsigned long rx_packets = 0;
1452 unsigned long rx_ok;
1453 int idx = rx_done->idx;
1454 int cnt = rx_done->cnt;
1459 while (rx_done->entry[idx].length != 0 && work_done < budget) {
1460 length = ntohs(rx_done->entry[idx].length);
1461 rx_done->entry[idx].length = 0;
1462 checksum = csum_unfold(rx_done->entry[idx].checksum);
1463 rx_ok = myri10ge_rx_done(ss, length, checksum);
1464 rx_packets += rx_ok;
1465 rx_bytes += rx_ok * (unsigned long)length;
1467 idx = cnt & (mgp->max_intr_slots - 1);
1472 ss->stats.rx_packets += rx_packets;
1473 ss->stats.rx_bytes += rx_bytes;
1475 /* restock receive rings if needed */
1476 if (ss->rx_small.fill_cnt - ss->rx_small.cnt < myri10ge_fill_thresh)
1477 myri10ge_alloc_rx_pages(mgp, &ss->rx_small,
1478 mgp->small_bytes + MXGEFW_PAD, 0);
1479 if (ss->rx_big.fill_cnt - ss->rx_big.cnt < myri10ge_fill_thresh)
1480 myri10ge_alloc_rx_pages(mgp, &ss->rx_big, mgp->big_bytes, 0);
1485 static inline void myri10ge_check_statblock(struct myri10ge_priv *mgp)
1487 struct mcp_irq_data *stats = mgp->ss[0].fw_stats;
1489 if (unlikely(stats->stats_updated)) {
1490 unsigned link_up = ntohl(stats->link_up);
1491 if (mgp->link_state != link_up) {
1492 mgp->link_state = link_up;
1494 if (mgp->link_state == MXGEFW_LINK_UP) {
1495 netif_info(mgp, link, mgp->dev, "link up\n");
1496 netif_carrier_on(mgp->dev);
1497 mgp->link_changes++;
1499 netif_info(mgp, link, mgp->dev, "link %s\n",
1500 (link_up == MXGEFW_LINK_MYRINET ?
1501 "mismatch (Myrinet detected)" :
1503 netif_carrier_off(mgp->dev);
1504 mgp->link_changes++;
1507 if (mgp->rdma_tags_available !=
1508 ntohl(stats->rdma_tags_available)) {
1509 mgp->rdma_tags_available =
1510 ntohl(stats->rdma_tags_available);
1511 netdev_warn(mgp->dev, "RDMA timed out! %d tags left\n",
1512 mgp->rdma_tags_available);
1514 mgp->down_cnt += stats->link_down;
1515 if (stats->link_down)
1516 wake_up(&mgp->down_wq);
1520 static int myri10ge_poll(struct napi_struct *napi, int budget)
1522 struct myri10ge_slice_state *ss =
1523 container_of(napi, struct myri10ge_slice_state, napi);
1526 #ifdef CONFIG_MYRI10GE_DCA
1527 if (ss->mgp->dca_enabled)
1528 myri10ge_update_dca(ss);
1530 /* process as many rx events as NAPI will allow */
1531 work_done = myri10ge_clean_rx_done(ss, budget);
1533 if (work_done < budget) {
1534 napi_complete_done(napi, work_done);
1535 put_be32(htonl(3), ss->irq_claim);
1540 static irqreturn_t myri10ge_intr(int irq, void *arg)
1542 struct myri10ge_slice_state *ss = arg;
1543 struct myri10ge_priv *mgp = ss->mgp;
1544 struct mcp_irq_data *stats = ss->fw_stats;
1545 struct myri10ge_tx_buf *tx = &ss->tx;
1546 u32 send_done_count;
1549 /* an interrupt on a non-zero receive-only slice is implicitly
1550 * valid since MSI-X irqs are not shared */
1551 if ((mgp->dev->real_num_tx_queues == 1) && (ss != mgp->ss)) {
1552 napi_schedule(&ss->napi);
1556 /* make sure it is our IRQ, and that the DMA has finished */
1557 if (unlikely(!stats->valid))
1560 /* low bit indicates receives are present, so schedule
1561 * napi poll handler */
1562 if (stats->valid & 1)
1563 napi_schedule(&ss->napi);
1565 if (!mgp->msi_enabled && !mgp->msix_enabled) {
1566 put_be32(0, mgp->irq_deassert);
1567 if (!myri10ge_deassert_wait)
1573 /* Wait for IRQ line to go low, if using INTx */
1577 /* check for transmit completes and receives */
1578 send_done_count = ntohl(stats->send_done_count);
1579 if (send_done_count != tx->pkt_done)
1580 myri10ge_tx_done(ss, (int)send_done_count);
1581 if (unlikely(i > myri10ge_max_irq_loops)) {
1582 netdev_warn(mgp->dev, "irq stuck?\n");
1584 schedule_work(&mgp->watchdog_work);
1586 if (likely(stats->valid == 0))
1592 /* Only slice 0 updates stats */
1594 myri10ge_check_statblock(mgp);
1596 put_be32(htonl(3), ss->irq_claim + 1);
1601 myri10ge_get_link_ksettings(struct net_device *netdev,
1602 struct ethtool_link_ksettings *cmd)
1604 struct myri10ge_priv *mgp = netdev_priv(netdev);
1608 cmd->base.autoneg = AUTONEG_DISABLE;
1609 cmd->base.speed = SPEED_10000;
1610 cmd->base.duplex = DUPLEX_FULL;
1613 * parse the product code to deterimine the interface type
1614 * (CX4, XFP, Quad Ribbon Fiber) by looking at the character
1615 * after the 3rd dash in the driver's cached copy of the
1616 * EEPROM's product code string.
1618 ptr = mgp->product_code_string;
1620 netdev_err(netdev, "Missing product code\n");
1623 for (i = 0; i < 3; i++, ptr++) {
1624 ptr = strchr(ptr, '-');
1626 netdev_err(netdev, "Invalid product code %s\n",
1627 mgp->product_code_string);
1633 if (*ptr == 'R' || *ptr == 'Q' || *ptr == 'S') {
1634 /* We've found either an XFP, quad ribbon fiber, or SFP+ */
1635 cmd->base.port = PORT_FIBRE;
1636 ethtool_link_ksettings_add_link_mode(cmd, supported, FIBRE);
1637 ethtool_link_ksettings_add_link_mode(cmd, advertising, FIBRE);
1639 cmd->base.port = PORT_OTHER;
1646 myri10ge_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
1648 struct myri10ge_priv *mgp = netdev_priv(netdev);
1650 strlcpy(info->driver, "myri10ge", sizeof(info->driver));
1651 strlcpy(info->version, MYRI10GE_VERSION_STR, sizeof(info->version));
1652 strlcpy(info->fw_version, mgp->fw_version, sizeof(info->fw_version));
1653 strlcpy(info->bus_info, pci_name(mgp->pdev), sizeof(info->bus_info));
1656 static int myri10ge_get_coalesce(struct net_device *netdev,
1657 struct ethtool_coalesce *coal,
1658 struct kernel_ethtool_coalesce *kernel_coal,
1659 struct netlink_ext_ack *extack)
1661 struct myri10ge_priv *mgp = netdev_priv(netdev);
1663 coal->rx_coalesce_usecs = mgp->intr_coal_delay;
1667 static int myri10ge_set_coalesce(struct net_device *netdev,
1668 struct ethtool_coalesce *coal,
1669 struct kernel_ethtool_coalesce *kernel_coal,
1670 struct netlink_ext_ack *extack)
1672 struct myri10ge_priv *mgp = netdev_priv(netdev);
1674 mgp->intr_coal_delay = coal->rx_coalesce_usecs;
1675 put_be32(htonl(mgp->intr_coal_delay), mgp->intr_coal_delay_ptr);
1680 myri10ge_get_pauseparam(struct net_device *netdev,
1681 struct ethtool_pauseparam *pause)
1683 struct myri10ge_priv *mgp = netdev_priv(netdev);
1686 pause->rx_pause = mgp->pause;
1687 pause->tx_pause = mgp->pause;
1691 myri10ge_set_pauseparam(struct net_device *netdev,
1692 struct ethtool_pauseparam *pause)
1694 struct myri10ge_priv *mgp = netdev_priv(netdev);
1696 if (pause->tx_pause != mgp->pause)
1697 return myri10ge_change_pause(mgp, pause->tx_pause);
1698 if (pause->rx_pause != mgp->pause)
1699 return myri10ge_change_pause(mgp, pause->rx_pause);
1700 if (pause->autoneg != 0)
1706 myri10ge_get_ringparam(struct net_device *netdev,
1707 struct ethtool_ringparam *ring,
1708 struct kernel_ethtool_ringparam *kernel_ring,
1709 struct netlink_ext_ack *extack)
1711 struct myri10ge_priv *mgp = netdev_priv(netdev);
1713 ring->rx_mini_max_pending = mgp->ss[0].rx_small.mask + 1;
1714 ring->rx_max_pending = mgp->ss[0].rx_big.mask + 1;
1715 ring->rx_jumbo_max_pending = 0;
1716 ring->tx_max_pending = mgp->ss[0].tx.mask + 1;
1717 ring->rx_mini_pending = ring->rx_mini_max_pending;
1718 ring->rx_pending = ring->rx_max_pending;
1719 ring->rx_jumbo_pending = ring->rx_jumbo_max_pending;
1720 ring->tx_pending = ring->tx_max_pending;
1723 static const char myri10ge_gstrings_main_stats[][ETH_GSTRING_LEN] = {
1724 "rx_packets", "tx_packets", "rx_bytes", "tx_bytes", "rx_errors",
1725 "tx_errors", "rx_dropped", "tx_dropped", "multicast", "collisions",
1726 "rx_length_errors", "rx_over_errors", "rx_crc_errors",
1727 "rx_frame_errors", "rx_fifo_errors", "rx_missed_errors",
1728 "tx_aborted_errors", "tx_carrier_errors", "tx_fifo_errors",
1729 "tx_heartbeat_errors", "tx_window_errors",
1730 /* device-specific stats */
1731 "tx_boundary", "irq", "MSI", "MSIX",
1732 "read_dma_bw_MBs", "write_dma_bw_MBs", "read_write_dma_bw_MBs",
1733 "serial_number", "watchdog_resets",
1734 #ifdef CONFIG_MYRI10GE_DCA
1735 "dca_capable_firmware", "dca_device_present",
1737 "link_changes", "link_up", "dropped_link_overflow",
1738 "dropped_link_error_or_filtered",
1739 "dropped_pause", "dropped_bad_phy", "dropped_bad_crc32",
1740 "dropped_unicast_filtered", "dropped_multicast_filtered",
1741 "dropped_runt", "dropped_overrun", "dropped_no_small_buffer",
1742 "dropped_no_big_buffer"
1745 static const char myri10ge_gstrings_slice_stats[][ETH_GSTRING_LEN] = {
1746 "----------- slice ---------",
1747 "tx_pkt_start", "tx_pkt_done", "tx_req", "tx_done",
1748 "rx_small_cnt", "rx_big_cnt",
1749 "wake_queue", "stop_queue", "tx_linearized",
1752 #define MYRI10GE_NET_STATS_LEN 21
1753 #define MYRI10GE_MAIN_STATS_LEN ARRAY_SIZE(myri10ge_gstrings_main_stats)
1754 #define MYRI10GE_SLICE_STATS_LEN ARRAY_SIZE(myri10ge_gstrings_slice_stats)
1757 myri10ge_get_strings(struct net_device *netdev, u32 stringset, u8 * data)
1759 struct myri10ge_priv *mgp = netdev_priv(netdev);
1762 switch (stringset) {
1764 memcpy(data, *myri10ge_gstrings_main_stats,
1765 sizeof(myri10ge_gstrings_main_stats));
1766 data += sizeof(myri10ge_gstrings_main_stats);
1767 for (i = 0; i < mgp->num_slices; i++) {
1768 memcpy(data, *myri10ge_gstrings_slice_stats,
1769 sizeof(myri10ge_gstrings_slice_stats));
1770 data += sizeof(myri10ge_gstrings_slice_stats);
1776 static int myri10ge_get_sset_count(struct net_device *netdev, int sset)
1778 struct myri10ge_priv *mgp = netdev_priv(netdev);
1782 return MYRI10GE_MAIN_STATS_LEN +
1783 mgp->num_slices * MYRI10GE_SLICE_STATS_LEN;
1790 myri10ge_get_ethtool_stats(struct net_device *netdev,
1791 struct ethtool_stats *stats, u64 * data)
1793 struct myri10ge_priv *mgp = netdev_priv(netdev);
1794 struct myri10ge_slice_state *ss;
1795 struct rtnl_link_stats64 link_stats;
1799 /* force stats update */
1800 memset(&link_stats, 0, sizeof(link_stats));
1801 (void)myri10ge_get_stats(netdev, &link_stats);
1802 for (i = 0; i < MYRI10GE_NET_STATS_LEN; i++)
1803 data[i] = ((u64 *)&link_stats)[i];
1805 data[i++] = (unsigned int)mgp->tx_boundary;
1806 data[i++] = (unsigned int)mgp->pdev->irq;
1807 data[i++] = (unsigned int)mgp->msi_enabled;
1808 data[i++] = (unsigned int)mgp->msix_enabled;
1809 data[i++] = (unsigned int)mgp->read_dma;
1810 data[i++] = (unsigned int)mgp->write_dma;
1811 data[i++] = (unsigned int)mgp->read_write_dma;
1812 data[i++] = (unsigned int)mgp->serial_number;
1813 data[i++] = (unsigned int)mgp->watchdog_resets;
1814 #ifdef CONFIG_MYRI10GE_DCA
1815 data[i++] = (unsigned int)(mgp->ss[0].dca_tag != NULL);
1816 data[i++] = (unsigned int)(mgp->dca_enabled);
1818 data[i++] = (unsigned int)mgp->link_changes;
1820 /* firmware stats are useful only in the first slice */
1822 data[i++] = (unsigned int)ntohl(ss->fw_stats->link_up);
1823 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_link_overflow);
1825 (unsigned int)ntohl(ss->fw_stats->dropped_link_error_or_filtered);
1826 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_pause);
1827 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_bad_phy);
1828 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_bad_crc32);
1829 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_unicast_filtered);
1831 (unsigned int)ntohl(ss->fw_stats->dropped_multicast_filtered);
1832 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_runt);
1833 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_overrun);
1834 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_no_small_buffer);
1835 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_no_big_buffer);
1837 for (slice = 0; slice < mgp->num_slices; slice++) {
1838 ss = &mgp->ss[slice];
1840 data[i++] = (unsigned int)ss->tx.pkt_start;
1841 data[i++] = (unsigned int)ss->tx.pkt_done;
1842 data[i++] = (unsigned int)ss->tx.req;
1843 data[i++] = (unsigned int)ss->tx.done;
1844 data[i++] = (unsigned int)ss->rx_small.cnt;
1845 data[i++] = (unsigned int)ss->rx_big.cnt;
1846 data[i++] = (unsigned int)ss->tx.wake_queue;
1847 data[i++] = (unsigned int)ss->tx.stop_queue;
1848 data[i++] = (unsigned int)ss->tx.linearized;
1852 static void myri10ge_set_msglevel(struct net_device *netdev, u32 value)
1854 struct myri10ge_priv *mgp = netdev_priv(netdev);
1855 mgp->msg_enable = value;
1858 static u32 myri10ge_get_msglevel(struct net_device *netdev)
1860 struct myri10ge_priv *mgp = netdev_priv(netdev);
1861 return mgp->msg_enable;
1865 * Use a low-level command to change the LED behavior. Rather than
1866 * blinking (which is the normal case), when identify is used, the
1867 * yellow LED turns solid.
1869 static int myri10ge_led(struct myri10ge_priv *mgp, int on)
1871 struct mcp_gen_header *hdr;
1872 struct device *dev = &mgp->pdev->dev;
1873 size_t hdr_off, pattern_off, hdr_len;
1874 u32 pattern = 0xfffffffe;
1876 /* find running firmware header */
1877 hdr_off = swab32(readl(mgp->sram + MCP_HEADER_PTR_OFFSET));
1878 if ((hdr_off & 3) || hdr_off + sizeof(*hdr) > mgp->sram_size) {
1879 dev_err(dev, "Running firmware has bad header offset (%d)\n",
1883 hdr_len = swab32(readl(mgp->sram + hdr_off +
1884 offsetof(struct mcp_gen_header, header_length)));
1885 pattern_off = hdr_off + offsetof(struct mcp_gen_header, led_pattern);
1886 if (pattern_off >= (hdr_len + hdr_off)) {
1887 dev_info(dev, "Firmware does not support LED identification\n");
1891 pattern = swab32(readl(mgp->sram + pattern_off + 4));
1892 writel(swab32(pattern), mgp->sram + pattern_off);
1897 myri10ge_phys_id(struct net_device *netdev, enum ethtool_phys_id_state state)
1899 struct myri10ge_priv *mgp = netdev_priv(netdev);
1903 case ETHTOOL_ID_ACTIVE:
1904 rc = myri10ge_led(mgp, 1);
1907 case ETHTOOL_ID_INACTIVE:
1908 rc = myri10ge_led(mgp, 0);
1918 static const struct ethtool_ops myri10ge_ethtool_ops = {
1919 .supported_coalesce_params = ETHTOOL_COALESCE_RX_USECS,
1920 .get_drvinfo = myri10ge_get_drvinfo,
1921 .get_coalesce = myri10ge_get_coalesce,
1922 .set_coalesce = myri10ge_set_coalesce,
1923 .get_pauseparam = myri10ge_get_pauseparam,
1924 .set_pauseparam = myri10ge_set_pauseparam,
1925 .get_ringparam = myri10ge_get_ringparam,
1926 .get_link = ethtool_op_get_link,
1927 .get_strings = myri10ge_get_strings,
1928 .get_sset_count = myri10ge_get_sset_count,
1929 .get_ethtool_stats = myri10ge_get_ethtool_stats,
1930 .set_msglevel = myri10ge_set_msglevel,
1931 .get_msglevel = myri10ge_get_msglevel,
1932 .set_phys_id = myri10ge_phys_id,
1933 .get_link_ksettings = myri10ge_get_link_ksettings,
1936 static int myri10ge_allocate_rings(struct myri10ge_slice_state *ss)
1938 struct myri10ge_priv *mgp = ss->mgp;
1939 struct myri10ge_cmd cmd;
1940 struct net_device *dev = mgp->dev;
1941 int tx_ring_size, rx_ring_size;
1942 int tx_ring_entries, rx_ring_entries;
1943 int i, slice, status;
1946 /* get ring sizes */
1947 slice = ss - mgp->ss;
1949 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SEND_RING_SIZE, &cmd, 0);
1950 tx_ring_size = cmd.data0;
1952 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_RX_RING_SIZE, &cmd, 0);
1955 rx_ring_size = cmd.data0;
1957 tx_ring_entries = tx_ring_size / sizeof(struct mcp_kreq_ether_send);
1958 rx_ring_entries = rx_ring_size / sizeof(struct mcp_dma_addr);
1959 ss->tx.mask = tx_ring_entries - 1;
1960 ss->rx_small.mask = ss->rx_big.mask = rx_ring_entries - 1;
1964 /* allocate the host shadow rings */
1966 bytes = 8 + (MYRI10GE_MAX_SEND_DESC_TSO + 4)
1967 * sizeof(*ss->tx.req_list);
1968 ss->tx.req_bytes = kzalloc(bytes, GFP_KERNEL);
1969 if (ss->tx.req_bytes == NULL)
1970 goto abort_with_nothing;
1972 /* ensure req_list entries are aligned to 8 bytes */
1973 ss->tx.req_list = (struct mcp_kreq_ether_send *)
1974 ALIGN((unsigned long)ss->tx.req_bytes, 8);
1975 ss->tx.queue_active = 0;
1977 bytes = rx_ring_entries * sizeof(*ss->rx_small.shadow);
1978 ss->rx_small.shadow = kzalloc(bytes, GFP_KERNEL);
1979 if (ss->rx_small.shadow == NULL)
1980 goto abort_with_tx_req_bytes;
1982 bytes = rx_ring_entries * sizeof(*ss->rx_big.shadow);
1983 ss->rx_big.shadow = kzalloc(bytes, GFP_KERNEL);
1984 if (ss->rx_big.shadow == NULL)
1985 goto abort_with_rx_small_shadow;
1987 /* allocate the host info rings */
1989 bytes = tx_ring_entries * sizeof(*ss->tx.info);
1990 ss->tx.info = kzalloc(bytes, GFP_KERNEL);
1991 if (ss->tx.info == NULL)
1992 goto abort_with_rx_big_shadow;
1994 bytes = rx_ring_entries * sizeof(*ss->rx_small.info);
1995 ss->rx_small.info = kzalloc(bytes, GFP_KERNEL);
1996 if (ss->rx_small.info == NULL)
1997 goto abort_with_tx_info;
1999 bytes = rx_ring_entries * sizeof(*ss->rx_big.info);
2000 ss->rx_big.info = kzalloc(bytes, GFP_KERNEL);
2001 if (ss->rx_big.info == NULL)
2002 goto abort_with_rx_small_info;
2004 /* Fill the receive rings */
2006 ss->rx_small.cnt = 0;
2007 ss->rx_big.fill_cnt = 0;
2008 ss->rx_small.fill_cnt = 0;
2009 ss->rx_small.page_offset = MYRI10GE_ALLOC_SIZE;
2010 ss->rx_big.page_offset = MYRI10GE_ALLOC_SIZE;
2011 ss->rx_small.watchdog_needed = 0;
2012 ss->rx_big.watchdog_needed = 0;
2013 if (mgp->small_bytes == 0) {
2014 ss->rx_small.fill_cnt = ss->rx_small.mask + 1;
2016 myri10ge_alloc_rx_pages(mgp, &ss->rx_small,
2017 mgp->small_bytes + MXGEFW_PAD, 0);
2020 if (ss->rx_small.fill_cnt < ss->rx_small.mask + 1) {
2021 netdev_err(dev, "slice-%d: alloced only %d small bufs\n",
2022 slice, ss->rx_small.fill_cnt);
2023 goto abort_with_rx_small_ring;
2026 myri10ge_alloc_rx_pages(mgp, &ss->rx_big, mgp->big_bytes, 0);
2027 if (ss->rx_big.fill_cnt < ss->rx_big.mask + 1) {
2028 netdev_err(dev, "slice-%d: alloced only %d big bufs\n",
2029 slice, ss->rx_big.fill_cnt);
2030 goto abort_with_rx_big_ring;
2035 abort_with_rx_big_ring:
2036 for (i = ss->rx_big.cnt; i < ss->rx_big.fill_cnt; i++) {
2037 int idx = i & ss->rx_big.mask;
2038 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_big.info[idx],
2040 put_page(ss->rx_big.info[idx].page);
2043 abort_with_rx_small_ring:
2044 if (mgp->small_bytes == 0)
2045 ss->rx_small.fill_cnt = ss->rx_small.cnt;
2046 for (i = ss->rx_small.cnt; i < ss->rx_small.fill_cnt; i++) {
2047 int idx = i & ss->rx_small.mask;
2048 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_small.info[idx],
2049 mgp->small_bytes + MXGEFW_PAD);
2050 put_page(ss->rx_small.info[idx].page);
2053 kfree(ss->rx_big.info);
2055 abort_with_rx_small_info:
2056 kfree(ss->rx_small.info);
2061 abort_with_rx_big_shadow:
2062 kfree(ss->rx_big.shadow);
2064 abort_with_rx_small_shadow:
2065 kfree(ss->rx_small.shadow);
2067 abort_with_tx_req_bytes:
2068 kfree(ss->tx.req_bytes);
2069 ss->tx.req_bytes = NULL;
2070 ss->tx.req_list = NULL;
2076 static void myri10ge_free_rings(struct myri10ge_slice_state *ss)
2078 struct myri10ge_priv *mgp = ss->mgp;
2079 struct sk_buff *skb;
2080 struct myri10ge_tx_buf *tx;
2083 /* If not allocated, skip it */
2084 if (ss->tx.req_list == NULL)
2087 for (i = ss->rx_big.cnt; i < ss->rx_big.fill_cnt; i++) {
2088 idx = i & ss->rx_big.mask;
2089 if (i == ss->rx_big.fill_cnt - 1)
2090 ss->rx_big.info[idx].page_offset = MYRI10GE_ALLOC_SIZE;
2091 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_big.info[idx],
2093 put_page(ss->rx_big.info[idx].page);
2096 if (mgp->small_bytes == 0)
2097 ss->rx_small.fill_cnt = ss->rx_small.cnt;
2098 for (i = ss->rx_small.cnt; i < ss->rx_small.fill_cnt; i++) {
2099 idx = i & ss->rx_small.mask;
2100 if (i == ss->rx_small.fill_cnt - 1)
2101 ss->rx_small.info[idx].page_offset =
2102 MYRI10GE_ALLOC_SIZE;
2103 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_small.info[idx],
2104 mgp->small_bytes + MXGEFW_PAD);
2105 put_page(ss->rx_small.info[idx].page);
2108 while (tx->done != tx->req) {
2109 idx = tx->done & tx->mask;
2110 skb = tx->info[idx].skb;
2113 tx->info[idx].skb = NULL;
2115 len = dma_unmap_len(&tx->info[idx], len);
2116 dma_unmap_len_set(&tx->info[idx], len, 0);
2118 ss->stats.tx_dropped++;
2119 dev_kfree_skb_any(skb);
2121 dma_unmap_single(&mgp->pdev->dev,
2122 dma_unmap_addr(&tx->info[idx],
2127 dma_unmap_page(&mgp->pdev->dev,
2128 dma_unmap_addr(&tx->info[idx],
2133 kfree(ss->rx_big.info);
2135 kfree(ss->rx_small.info);
2139 kfree(ss->rx_big.shadow);
2141 kfree(ss->rx_small.shadow);
2143 kfree(ss->tx.req_bytes);
2144 ss->tx.req_bytes = NULL;
2145 ss->tx.req_list = NULL;
2148 static int myri10ge_request_irq(struct myri10ge_priv *mgp)
2150 struct pci_dev *pdev = mgp->pdev;
2151 struct myri10ge_slice_state *ss;
2152 struct net_device *netdev = mgp->dev;
2156 mgp->msi_enabled = 0;
2157 mgp->msix_enabled = 0;
2160 if (mgp->num_slices > 1) {
2161 status = pci_enable_msix_range(pdev, mgp->msix_vectors,
2162 mgp->num_slices, mgp->num_slices);
2165 "Error %d setting up MSI-X\n", status);
2168 mgp->msix_enabled = 1;
2170 if (mgp->msix_enabled == 0) {
2171 status = pci_enable_msi(pdev);
2174 "Error %d setting up MSI; falling back to xPIC\n",
2177 mgp->msi_enabled = 1;
2181 if (mgp->msix_enabled) {
2182 for (i = 0; i < mgp->num_slices; i++) {
2184 snprintf(ss->irq_desc, sizeof(ss->irq_desc),
2185 "%s:slice-%d", netdev->name, i);
2186 status = request_irq(mgp->msix_vectors[i].vector,
2187 myri10ge_intr, 0, ss->irq_desc,
2191 "slice %d failed to allocate IRQ\n", i);
2194 free_irq(mgp->msix_vectors[i].vector,
2198 pci_disable_msix(pdev);
2203 status = request_irq(pdev->irq, myri10ge_intr, IRQF_SHARED,
2204 mgp->dev->name, &mgp->ss[0]);
2206 dev_err(&pdev->dev, "failed to allocate IRQ\n");
2207 if (mgp->msi_enabled)
2208 pci_disable_msi(pdev);
2214 static void myri10ge_free_irq(struct myri10ge_priv *mgp)
2216 struct pci_dev *pdev = mgp->pdev;
2219 if (mgp->msix_enabled) {
2220 for (i = 0; i < mgp->num_slices; i++)
2221 free_irq(mgp->msix_vectors[i].vector, &mgp->ss[i]);
2223 free_irq(pdev->irq, &mgp->ss[0]);
2225 if (mgp->msi_enabled)
2226 pci_disable_msi(pdev);
2227 if (mgp->msix_enabled)
2228 pci_disable_msix(pdev);
2231 static int myri10ge_get_txrx(struct myri10ge_priv *mgp, int slice)
2233 struct myri10ge_cmd cmd;
2234 struct myri10ge_slice_state *ss;
2237 ss = &mgp->ss[slice];
2239 if (slice == 0 || (mgp->dev->real_num_tx_queues > 1)) {
2241 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SEND_OFFSET,
2243 ss->tx.lanai = (struct mcp_kreq_ether_send __iomem *)
2244 (mgp->sram + cmd.data0);
2247 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SMALL_RX_OFFSET,
2249 ss->rx_small.lanai = (struct mcp_kreq_ether_recv __iomem *)
2250 (mgp->sram + cmd.data0);
2253 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_BIG_RX_OFFSET, &cmd, 0);
2254 ss->rx_big.lanai = (struct mcp_kreq_ether_recv __iomem *)
2255 (mgp->sram + cmd.data0);
2257 ss->tx.send_go = (__iomem __be32 *)
2258 (mgp->sram + MXGEFW_ETH_SEND_GO + 64 * slice);
2259 ss->tx.send_stop = (__iomem __be32 *)
2260 (mgp->sram + MXGEFW_ETH_SEND_STOP + 64 * slice);
2265 static int myri10ge_set_stats(struct myri10ge_priv *mgp, int slice)
2267 struct myri10ge_cmd cmd;
2268 struct myri10ge_slice_state *ss;
2271 ss = &mgp->ss[slice];
2272 cmd.data0 = MYRI10GE_LOWPART_TO_U32(ss->fw_stats_bus);
2273 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(ss->fw_stats_bus);
2274 cmd.data2 = sizeof(struct mcp_irq_data) | (slice << 16);
2275 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_STATS_DMA_V2, &cmd, 0);
2276 if (status == -ENOSYS) {
2277 dma_addr_t bus = ss->fw_stats_bus;
2280 bus += offsetof(struct mcp_irq_data, send_done_count);
2281 cmd.data0 = MYRI10GE_LOWPART_TO_U32(bus);
2282 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(bus);
2283 status = myri10ge_send_cmd(mgp,
2284 MXGEFW_CMD_SET_STATS_DMA_OBSOLETE,
2286 /* Firmware cannot support multicast without STATS_DMA_V2 */
2287 mgp->fw_multicast_support = 0;
2289 mgp->fw_multicast_support = 1;
2294 static int myri10ge_open(struct net_device *dev)
2296 struct myri10ge_slice_state *ss;
2297 struct myri10ge_priv *mgp = netdev_priv(dev);
2298 struct myri10ge_cmd cmd;
2299 int i, status, big_pow2, slice;
2302 if (mgp->running != MYRI10GE_ETH_STOPPED)
2305 mgp->running = MYRI10GE_ETH_STARTING;
2306 status = myri10ge_reset(mgp);
2308 netdev_err(dev, "failed reset\n");
2309 goto abort_with_nothing;
2312 if (mgp->num_slices > 1) {
2313 cmd.data0 = mgp->num_slices;
2314 cmd.data1 = MXGEFW_SLICE_INTR_MODE_ONE_PER_SLICE;
2315 if (mgp->dev->real_num_tx_queues > 1)
2316 cmd.data1 |= MXGEFW_SLICE_ENABLE_MULTIPLE_TX_QUEUES;
2317 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ENABLE_RSS_QUEUES,
2320 netdev_err(dev, "failed to set number of slices\n");
2321 goto abort_with_nothing;
2323 /* setup the indirection table */
2324 cmd.data0 = mgp->num_slices;
2325 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_TABLE_SIZE,
2328 status |= myri10ge_send_cmd(mgp,
2329 MXGEFW_CMD_GET_RSS_TABLE_OFFSET,
2332 netdev_err(dev, "failed to setup rss tables\n");
2333 goto abort_with_nothing;
2336 /* just enable an identity mapping */
2337 itable = mgp->sram + cmd.data0;
2338 for (i = 0; i < mgp->num_slices; i++)
2339 __raw_writeb(i, &itable[i]);
2342 cmd.data1 = myri10ge_rss_hash;
2343 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_ENABLE,
2346 netdev_err(dev, "failed to enable slices\n");
2347 goto abort_with_nothing;
2351 status = myri10ge_request_irq(mgp);
2353 goto abort_with_nothing;
2355 /* decide what small buffer size to use. For good TCP rx
2356 * performance, it is important to not receive 1514 byte
2357 * frames into jumbo buffers, as it confuses the socket buffer
2358 * accounting code, leading to drops and erratic performance.
2361 if (dev->mtu <= ETH_DATA_LEN)
2362 /* enough for a TCP header */
2363 mgp->small_bytes = (128 > SMP_CACHE_BYTES)
2364 ? (128 - MXGEFW_PAD)
2365 : (SMP_CACHE_BYTES - MXGEFW_PAD);
2367 /* enough for a vlan encapsulated ETH_DATA_LEN frame */
2368 mgp->small_bytes = VLAN_ETH_FRAME_LEN;
2370 /* Override the small buffer size? */
2371 if (myri10ge_small_bytes >= 0)
2372 mgp->small_bytes = myri10ge_small_bytes;
2374 /* Firmware needs the big buff size as a power of 2. Lie and
2375 * tell him the buffer is larger, because we only use 1
2376 * buffer/pkt, and the mtu will prevent overruns.
2378 big_pow2 = dev->mtu + ETH_HLEN + VLAN_HLEN + MXGEFW_PAD;
2379 if (big_pow2 < MYRI10GE_ALLOC_SIZE / 2) {
2380 while (!is_power_of_2(big_pow2))
2382 mgp->big_bytes = dev->mtu + ETH_HLEN + VLAN_HLEN + MXGEFW_PAD;
2384 big_pow2 = MYRI10GE_ALLOC_SIZE;
2385 mgp->big_bytes = big_pow2;
2388 /* setup the per-slice data structures */
2389 for (slice = 0; slice < mgp->num_slices; slice++) {
2390 ss = &mgp->ss[slice];
2392 status = myri10ge_get_txrx(mgp, slice);
2394 netdev_err(dev, "failed to get ring sizes or locations\n");
2395 goto abort_with_rings;
2397 status = myri10ge_allocate_rings(ss);
2399 goto abort_with_rings;
2401 /* only firmware which supports multiple TX queues
2402 * supports setting up the tx stats on non-zero
2404 if (slice == 0 || mgp->dev->real_num_tx_queues > 1)
2405 status = myri10ge_set_stats(mgp, slice);
2407 netdev_err(dev, "Couldn't set stats DMA\n");
2408 goto abort_with_rings;
2411 /* must happen prior to any irq */
2412 napi_enable(&(ss)->napi);
2415 /* now give firmware buffers sizes, and MTU */
2416 cmd.data0 = dev->mtu + ETH_HLEN + VLAN_HLEN;
2417 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_MTU, &cmd, 0);
2418 cmd.data0 = mgp->small_bytes;
2420 myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_SMALL_BUFFER_SIZE, &cmd, 0);
2421 cmd.data0 = big_pow2;
2423 myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_BIG_BUFFER_SIZE, &cmd, 0);
2425 netdev_err(dev, "Couldn't set buffer sizes\n");
2426 goto abort_with_rings;
2430 * Set Linux style TSO mode; this is needed only on newer
2431 * firmware versions. Older versions default to Linux
2435 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_TSO_MODE, &cmd, 0);
2436 if (status && status != -ENOSYS) {
2437 netdev_err(dev, "Couldn't set TSO mode\n");
2438 goto abort_with_rings;
2441 mgp->link_state = ~0U;
2442 mgp->rdma_tags_available = 15;
2444 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ETHERNET_UP, &cmd, 0);
2446 netdev_err(dev, "Couldn't bring up link\n");
2447 goto abort_with_rings;
2450 mgp->running = MYRI10GE_ETH_RUNNING;
2451 mgp->watchdog_timer.expires = jiffies + myri10ge_watchdog_timeout * HZ;
2452 add_timer(&mgp->watchdog_timer);
2453 netif_tx_wake_all_queues(dev);
2460 napi_disable(&mgp->ss[slice].napi);
2462 for (i = 0; i < mgp->num_slices; i++)
2463 myri10ge_free_rings(&mgp->ss[i]);
2465 myri10ge_free_irq(mgp);
2468 mgp->running = MYRI10GE_ETH_STOPPED;
2472 static int myri10ge_close(struct net_device *dev)
2474 struct myri10ge_priv *mgp = netdev_priv(dev);
2475 struct myri10ge_cmd cmd;
2476 int status, old_down_cnt;
2479 if (mgp->running != MYRI10GE_ETH_RUNNING)
2482 if (mgp->ss[0].tx.req_bytes == NULL)
2485 del_timer_sync(&mgp->watchdog_timer);
2486 mgp->running = MYRI10GE_ETH_STOPPING;
2487 for (i = 0; i < mgp->num_slices; i++)
2488 napi_disable(&mgp->ss[i].napi);
2490 netif_carrier_off(dev);
2492 netif_tx_stop_all_queues(dev);
2493 if (mgp->rebooted == 0) {
2494 old_down_cnt = mgp->down_cnt;
2497 myri10ge_send_cmd(mgp, MXGEFW_CMD_ETHERNET_DOWN, &cmd, 0);
2499 netdev_err(dev, "Couldn't bring down link\n");
2501 wait_event_timeout(mgp->down_wq, old_down_cnt != mgp->down_cnt,
2503 if (old_down_cnt == mgp->down_cnt)
2504 netdev_err(dev, "never got down irq\n");
2506 netif_tx_disable(dev);
2507 myri10ge_free_irq(mgp);
2508 for (i = 0; i < mgp->num_slices; i++)
2509 myri10ge_free_rings(&mgp->ss[i]);
2511 mgp->running = MYRI10GE_ETH_STOPPED;
2515 /* copy an array of struct mcp_kreq_ether_send's to the mcp. Copy
2516 * backwards one at a time and handle ring wraps */
2519 myri10ge_submit_req_backwards(struct myri10ge_tx_buf *tx,
2520 struct mcp_kreq_ether_send *src, int cnt)
2522 int idx, starting_slot;
2523 starting_slot = tx->req;
2526 idx = (starting_slot + cnt) & tx->mask;
2527 myri10ge_pio_copy(&tx->lanai[idx], &src[cnt], sizeof(*src));
2533 * copy an array of struct mcp_kreq_ether_send's to the mcp. Copy
2534 * at most 32 bytes at a time, so as to avoid involving the software
2535 * pio handler in the nic. We re-write the first segment's flags
2536 * to mark them valid only after writing the entire chain.
2540 myri10ge_submit_req(struct myri10ge_tx_buf *tx, struct mcp_kreq_ether_send *src,
2544 struct mcp_kreq_ether_send __iomem *dstp, *dst;
2545 struct mcp_kreq_ether_send *srcp;
2548 idx = tx->req & tx->mask;
2550 last_flags = src->flags;
2553 dst = dstp = &tx->lanai[idx];
2556 if ((idx + cnt) < tx->mask) {
2557 for (i = 0; i < (cnt - 1); i += 2) {
2558 myri10ge_pio_copy(dstp, srcp, 2 * sizeof(*src));
2559 mb(); /* force write every 32 bytes */
2564 /* submit all but the first request, and ensure
2565 * that it is submitted below */
2566 myri10ge_submit_req_backwards(tx, src, cnt);
2570 /* submit the first request */
2571 myri10ge_pio_copy(dstp, srcp, sizeof(*src));
2572 mb(); /* barrier before setting valid flag */
2575 /* re-write the last 32-bits with the valid flags */
2576 src->flags = last_flags;
2577 put_be32(*((__be32 *) src + 3), (__be32 __iomem *) dst + 3);
2582 static void myri10ge_unmap_tx_dma(struct myri10ge_priv *mgp,
2583 struct myri10ge_tx_buf *tx, int idx)
2588 /* Free any DMA resources we've alloced and clear out the skb slot */
2589 last_idx = (idx + 1) & tx->mask;
2590 idx = tx->req & tx->mask;
2592 len = dma_unmap_len(&tx->info[idx], len);
2594 if (tx->info[idx].skb != NULL)
2595 dma_unmap_single(&mgp->pdev->dev,
2596 dma_unmap_addr(&tx->info[idx],
2600 dma_unmap_page(&mgp->pdev->dev,
2601 dma_unmap_addr(&tx->info[idx],
2604 dma_unmap_len_set(&tx->info[idx], len, 0);
2605 tx->info[idx].skb = NULL;
2607 idx = (idx + 1) & tx->mask;
2608 } while (idx != last_idx);
2612 * Transmit a packet. We need to split the packet so that a single
2613 * segment does not cross myri10ge->tx_boundary, so this makes segment
2614 * counting tricky. So rather than try to count segments up front, we
2615 * just give up if there are too few segments to hold a reasonably
2616 * fragmented packet currently available. If we run
2617 * out of segments while preparing a packet for DMA, we just linearize
2621 static netdev_tx_t myri10ge_xmit(struct sk_buff *skb,
2622 struct net_device *dev)
2624 struct myri10ge_priv *mgp = netdev_priv(dev);
2625 struct myri10ge_slice_state *ss;
2626 struct mcp_kreq_ether_send *req;
2627 struct myri10ge_tx_buf *tx;
2629 struct netdev_queue *netdev_queue;
2632 __be32 high_swapped;
2634 int idx, avail, frag_cnt, frag_idx, count, mss, max_segments;
2635 u16 pseudo_hdr_offset, cksum_offset, queue;
2636 int cum_len, seglen, boundary, rdma_count;
2639 queue = skb_get_queue_mapping(skb);
2640 ss = &mgp->ss[queue];
2641 netdev_queue = netdev_get_tx_queue(mgp->dev, queue);
2646 avail = tx->mask - 1 - (tx->req - tx->done);
2649 max_segments = MXGEFW_MAX_SEND_DESC;
2651 if (skb_is_gso(skb)) {
2652 mss = skb_shinfo(skb)->gso_size;
2653 max_segments = MYRI10GE_MAX_SEND_DESC_TSO;
2656 if ((unlikely(avail < max_segments))) {
2657 /* we are out of transmit resources */
2659 netif_tx_stop_queue(netdev_queue);
2660 return NETDEV_TX_BUSY;
2663 /* Setup checksum offloading, if needed */
2665 pseudo_hdr_offset = 0;
2667 flags = (MXGEFW_FLAGS_NO_TSO | MXGEFW_FLAGS_FIRST);
2668 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2669 cksum_offset = skb_checksum_start_offset(skb);
2670 pseudo_hdr_offset = cksum_offset + skb->csum_offset;
2671 /* If the headers are excessively large, then we must
2672 * fall back to a software checksum */
2673 if (unlikely(!mss && (cksum_offset > 255 ||
2674 pseudo_hdr_offset > 127))) {
2675 if (skb_checksum_help(skb))
2678 pseudo_hdr_offset = 0;
2680 odd_flag = MXGEFW_FLAGS_ALIGN_ODD;
2681 flags |= MXGEFW_FLAGS_CKSUM;
2687 if (mss) { /* TSO */
2688 /* this removes any CKSUM flag from before */
2689 flags = (MXGEFW_FLAGS_TSO_HDR | MXGEFW_FLAGS_FIRST);
2691 /* negative cum_len signifies to the
2692 * send loop that we are still in the
2693 * header portion of the TSO packet.
2694 * TSO header can be at most 1KB long */
2695 cum_len = -(skb_transport_offset(skb) + tcp_hdrlen(skb));
2697 /* for IPv6 TSO, the checksum offset stores the
2698 * TCP header length, to save the firmware from
2699 * the need to parse the headers */
2700 if (skb_is_gso_v6(skb)) {
2701 cksum_offset = tcp_hdrlen(skb);
2702 /* Can only handle headers <= max_tso6 long */
2703 if (unlikely(-cum_len > mgp->max_tso6))
2704 return myri10ge_sw_tso(skb, dev);
2706 /* for TSO, pseudo_hdr_offset holds mss.
2707 * The firmware figures out where to put
2708 * the checksum by parsing the header. */
2709 pseudo_hdr_offset = mss;
2711 /* Mark small packets, and pad out tiny packets */
2712 if (skb->len <= MXGEFW_SEND_SMALL_SIZE) {
2713 flags |= MXGEFW_FLAGS_SMALL;
2715 /* pad frames to at least ETH_ZLEN bytes */
2716 if (eth_skb_pad(skb)) {
2717 /* The packet is gone, so we must
2719 ss->stats.tx_dropped += 1;
2720 return NETDEV_TX_OK;
2724 /* map the skb for DMA */
2725 len = skb_headlen(skb);
2726 bus = dma_map_single(&mgp->pdev->dev, skb->data, len, DMA_TO_DEVICE);
2727 if (unlikely(dma_mapping_error(&mgp->pdev->dev, bus)))
2730 idx = tx->req & tx->mask;
2731 tx->info[idx].skb = skb;
2732 dma_unmap_addr_set(&tx->info[idx], bus, bus);
2733 dma_unmap_len_set(&tx->info[idx], len, len);
2735 frag_cnt = skb_shinfo(skb)->nr_frags;
2740 /* "rdma_count" is the number of RDMAs belonging to the
2741 * current packet BEFORE the current send request. For
2742 * non-TSO packets, this is equal to "count".
2743 * For TSO packets, rdma_count needs to be reset
2744 * to 0 after a segment cut.
2746 * The rdma_count field of the send request is
2747 * the number of RDMAs of the packet starting at
2748 * that request. For TSO send requests with one ore more cuts
2749 * in the middle, this is the number of RDMAs starting
2750 * after the last cut in the request. All previous
2751 * segments before the last cut implicitly have 1 RDMA.
2753 * Since the number of RDMAs is not known beforehand,
2754 * it must be filled-in retroactively - after each
2755 * segmentation cut or at the end of the entire packet.
2759 /* Break the SKB or Fragment up into pieces which
2760 * do not cross mgp->tx_boundary */
2761 low = MYRI10GE_LOWPART_TO_U32(bus);
2762 high_swapped = htonl(MYRI10GE_HIGHPART_TO_U32(bus));
2767 if (unlikely(count == max_segments))
2768 goto abort_linearize;
2771 (low + mgp->tx_boundary) & ~(mgp->tx_boundary - 1);
2772 seglen = boundary - low;
2775 flags_next = flags & ~MXGEFW_FLAGS_FIRST;
2776 cum_len_next = cum_len + seglen;
2777 if (mss) { /* TSO */
2778 (req - rdma_count)->rdma_count = rdma_count + 1;
2780 if (likely(cum_len >= 0)) { /* payload */
2781 int next_is_first, chop;
2783 chop = (cum_len_next > mss);
2784 cum_len_next = cum_len_next % mss;
2785 next_is_first = (cum_len_next == 0);
2786 flags |= chop * MXGEFW_FLAGS_TSO_CHOP;
2787 flags_next |= next_is_first *
2789 rdma_count |= -(chop | next_is_first);
2790 rdma_count += chop & ~next_is_first;
2791 } else if (likely(cum_len_next >= 0)) { /* header ends */
2797 small = (mss <= MXGEFW_SEND_SMALL_SIZE);
2798 flags_next = MXGEFW_FLAGS_TSO_PLD |
2799 MXGEFW_FLAGS_FIRST |
2800 (small * MXGEFW_FLAGS_SMALL);
2803 req->addr_high = high_swapped;
2804 req->addr_low = htonl(low);
2805 req->pseudo_hdr_offset = htons(pseudo_hdr_offset);
2806 req->pad = 0; /* complete solid 16-byte block; does this matter? */
2807 req->rdma_count = 1;
2808 req->length = htons(seglen);
2809 req->cksum_offset = cksum_offset;
2810 req->flags = flags | ((cum_len & 1) * odd_flag);
2814 cum_len = cum_len_next;
2819 if (cksum_offset != 0 && !(mss && skb_is_gso_v6(skb))) {
2820 if (unlikely(cksum_offset > seglen))
2821 cksum_offset -= seglen;
2826 if (frag_idx == frag_cnt)
2829 /* map next fragment for DMA */
2830 frag = &skb_shinfo(skb)->frags[frag_idx];
2832 len = skb_frag_size(frag);
2833 bus = skb_frag_dma_map(&mgp->pdev->dev, frag, 0, len,
2835 if (unlikely(dma_mapping_error(&mgp->pdev->dev, bus))) {
2836 myri10ge_unmap_tx_dma(mgp, tx, idx);
2839 idx = (count + tx->req) & tx->mask;
2840 dma_unmap_addr_set(&tx->info[idx], bus, bus);
2841 dma_unmap_len_set(&tx->info[idx], len, len);
2844 (req - rdma_count)->rdma_count = rdma_count;
2848 req->flags |= MXGEFW_FLAGS_TSO_LAST;
2849 } while (!(req->flags & (MXGEFW_FLAGS_TSO_CHOP |
2850 MXGEFW_FLAGS_FIRST)));
2851 idx = ((count - 1) + tx->req) & tx->mask;
2852 tx->info[idx].last = 1;
2853 myri10ge_submit_req(tx, tx->req_list, count);
2854 /* if using multiple tx queues, make sure NIC polls the
2856 if ((mgp->dev->real_num_tx_queues > 1) && tx->queue_active == 0) {
2857 tx->queue_active = 1;
2858 put_be32(htonl(1), tx->send_go);
2862 if ((avail - count) < MXGEFW_MAX_SEND_DESC) {
2864 netif_tx_stop_queue(netdev_queue);
2866 return NETDEV_TX_OK;
2869 myri10ge_unmap_tx_dma(mgp, tx, idx);
2871 if (skb_is_gso(skb)) {
2872 netdev_err(mgp->dev, "TSO but wanted to linearize?!?!?\n");
2876 if (skb_linearize(skb))
2883 dev_kfree_skb_any(skb);
2884 ss->stats.tx_dropped += 1;
2885 return NETDEV_TX_OK;
2889 static netdev_tx_t myri10ge_sw_tso(struct sk_buff *skb,
2890 struct net_device *dev)
2892 struct sk_buff *segs, *curr, *next;
2893 struct myri10ge_priv *mgp = netdev_priv(dev);
2894 struct myri10ge_slice_state *ss;
2897 segs = skb_gso_segment(skb, dev->features & ~NETIF_F_TSO6);
2901 skb_list_walk_safe(segs, curr, next) {
2902 skb_mark_not_on_list(curr);
2903 status = myri10ge_xmit(curr, dev);
2905 dev_kfree_skb_any(curr);
2906 skb_list_walk_safe(next, curr, next) {
2908 dev_kfree_skb_any(curr);
2913 dev_kfree_skb_any(skb);
2914 return NETDEV_TX_OK;
2917 ss = &mgp->ss[skb_get_queue_mapping(skb)];
2918 dev_kfree_skb_any(skb);
2919 ss->stats.tx_dropped += 1;
2920 return NETDEV_TX_OK;
2923 static void myri10ge_get_stats(struct net_device *dev,
2924 struct rtnl_link_stats64 *stats)
2926 const struct myri10ge_priv *mgp = netdev_priv(dev);
2927 const struct myri10ge_slice_netstats *slice_stats;
2930 for (i = 0; i < mgp->num_slices; i++) {
2931 slice_stats = &mgp->ss[i].stats;
2932 stats->rx_packets += slice_stats->rx_packets;
2933 stats->tx_packets += slice_stats->tx_packets;
2934 stats->rx_bytes += slice_stats->rx_bytes;
2935 stats->tx_bytes += slice_stats->tx_bytes;
2936 stats->rx_dropped += slice_stats->rx_dropped;
2937 stats->tx_dropped += slice_stats->tx_dropped;
2941 static void myri10ge_set_multicast_list(struct net_device *dev)
2943 struct myri10ge_priv *mgp = netdev_priv(dev);
2944 struct myri10ge_cmd cmd;
2945 struct netdev_hw_addr *ha;
2946 __be32 data[2] = { 0, 0 };
2949 /* can be called from atomic contexts,
2950 * pass 1 to force atomicity in myri10ge_send_cmd() */
2951 myri10ge_change_promisc(mgp, dev->flags & IFF_PROMISC, 1);
2953 /* This firmware is known to not support multicast */
2954 if (!mgp->fw_multicast_support)
2957 /* Disable multicast filtering */
2959 err = myri10ge_send_cmd(mgp, MXGEFW_ENABLE_ALLMULTI, &cmd, 1);
2961 netdev_err(dev, "Failed MXGEFW_ENABLE_ALLMULTI, error status: %d\n",
2966 if ((dev->flags & IFF_ALLMULTI) || mgp->adopted_rx_filter_bug) {
2967 /* request to disable multicast filtering, so quit here */
2971 /* Flush the filters */
2973 err = myri10ge_send_cmd(mgp, MXGEFW_LEAVE_ALL_MULTICAST_GROUPS,
2976 netdev_err(dev, "Failed MXGEFW_LEAVE_ALL_MULTICAST_GROUPS, error status: %d\n",
2981 /* Walk the multicast list, and add each address */
2982 netdev_for_each_mc_addr(ha, dev) {
2983 memcpy(data, &ha->addr, ETH_ALEN);
2984 cmd.data0 = ntohl(data[0]);
2985 cmd.data1 = ntohl(data[1]);
2986 err = myri10ge_send_cmd(mgp, MXGEFW_JOIN_MULTICAST_GROUP,
2990 netdev_err(dev, "Failed MXGEFW_JOIN_MULTICAST_GROUP, error status:%d %pM\n",
2995 /* Enable multicast filtering */
2996 err = myri10ge_send_cmd(mgp, MXGEFW_DISABLE_ALLMULTI, &cmd, 1);
2998 netdev_err(dev, "Failed MXGEFW_DISABLE_ALLMULTI, error status: %d\n",
3009 static int myri10ge_set_mac_address(struct net_device *dev, void *addr)
3011 struct sockaddr *sa = addr;
3012 struct myri10ge_priv *mgp = netdev_priv(dev);
3015 if (!is_valid_ether_addr(sa->sa_data))
3016 return -EADDRNOTAVAIL;
3018 status = myri10ge_update_mac_address(mgp, sa->sa_data);
3020 netdev_err(dev, "changing mac address failed with %d\n",
3025 /* change the dev structure */
3026 eth_hw_addr_set(dev, sa->sa_data);
3030 static int myri10ge_change_mtu(struct net_device *dev, int new_mtu)
3032 struct myri10ge_priv *mgp = netdev_priv(dev);
3034 netdev_info(dev, "changing mtu from %d to %d\n", dev->mtu, new_mtu);
3036 /* if we change the mtu on an active device, we must
3037 * reset the device so the firmware sees the change */
3038 myri10ge_close(dev);
3048 * Enable ECRC to align PCI-E Completion packets on an 8-byte boundary.
3049 * Only do it if the bridge is a root port since we don't want to disturb
3050 * any other device, except if forced with myri10ge_ecrc_enable > 1.
3053 static void myri10ge_enable_ecrc(struct myri10ge_priv *mgp)
3055 struct pci_dev *bridge = mgp->pdev->bus->self;
3056 struct device *dev = &mgp->pdev->dev;
3061 if (!myri10ge_ecrc_enable || !bridge)
3064 /* check that the bridge is a root port */
3065 if (pci_pcie_type(bridge) != PCI_EXP_TYPE_ROOT_PORT) {
3066 if (myri10ge_ecrc_enable > 1) {
3067 struct pci_dev *prev_bridge, *old_bridge = bridge;
3069 /* Walk the hierarchy up to the root port
3070 * where ECRC has to be enabled */
3072 prev_bridge = bridge;
3073 bridge = bridge->bus->self;
3074 if (!bridge || prev_bridge == bridge) {
3076 "Failed to find root port"
3077 " to force ECRC\n");
3080 } while (pci_pcie_type(bridge) !=
3081 PCI_EXP_TYPE_ROOT_PORT);
3084 "Forcing ECRC on non-root port %s"
3085 " (enabling on root port %s)\n",
3086 pci_name(old_bridge), pci_name(bridge));
3089 "Not enabling ECRC on non-root port %s\n",
3095 cap = pci_find_ext_capability(bridge, PCI_EXT_CAP_ID_ERR);
3099 ret = pci_read_config_dword(bridge, cap + PCI_ERR_CAP, &err_cap);
3101 dev_err(dev, "failed reading ext-conf-space of %s\n",
3103 dev_err(dev, "\t pci=nommconf in use? "
3104 "or buggy/incomplete/absent ACPI MCFG attr?\n");
3107 if (!(err_cap & PCI_ERR_CAP_ECRC_GENC))
3110 err_cap |= PCI_ERR_CAP_ECRC_GENE;
3111 pci_write_config_dword(bridge, cap + PCI_ERR_CAP, err_cap);
3112 dev_info(dev, "Enabled ECRC on upstream bridge %s\n", pci_name(bridge));
3116 * The Lanai Z8E PCI-E interface achieves higher Read-DMA throughput
3117 * when the PCI-E Completion packets are aligned on an 8-byte
3118 * boundary. Some PCI-E chip sets always align Completion packets; on
3119 * the ones that do not, the alignment can be enforced by enabling
3120 * ECRC generation (if supported).
3122 * When PCI-E Completion packets are not aligned, it is actually more
3123 * efficient to limit Read-DMA transactions to 2KB, rather than 4KB.
3125 * If the driver can neither enable ECRC nor verify that it has
3126 * already been enabled, then it must use a firmware image which works
3127 * around unaligned completion packets (myri10ge_rss_ethp_z8e.dat), and it
3128 * should also ensure that it never gives the device a Read-DMA which is
3129 * larger than 2KB by setting the tx_boundary to 2KB. If ECRC is
3130 * enabled, then the driver should use the aligned (myri10ge_rss_eth_z8e.dat)
3131 * firmware image, and set tx_boundary to 4KB.
3134 static void myri10ge_firmware_probe(struct myri10ge_priv *mgp)
3136 struct pci_dev *pdev = mgp->pdev;
3137 struct device *dev = &pdev->dev;
3140 mgp->tx_boundary = 4096;
3142 * Verify the max read request size was set to 4KB
3143 * before trying the test with 4KB.
3145 status = pcie_get_readrq(pdev);
3147 dev_err(dev, "Couldn't read max read req size: %d\n", status);
3150 if (status != 4096) {
3151 dev_warn(dev, "Max Read Request size != 4096 (%d)\n", status);
3152 mgp->tx_boundary = 2048;
3155 * load the optimized firmware (which assumes aligned PCIe
3156 * completions) in order to see if it works on this host.
3158 set_fw_name(mgp, myri10ge_fw_aligned, false);
3159 status = myri10ge_load_firmware(mgp, 1);
3165 * Enable ECRC if possible
3167 myri10ge_enable_ecrc(mgp);
3170 * Run a DMA test which watches for unaligned completions and
3171 * aborts on the first one seen.
3174 status = myri10ge_dma_test(mgp, MXGEFW_CMD_UNALIGNED_TEST);
3176 return; /* keep the aligned firmware */
3178 if (status != -E2BIG)
3179 dev_warn(dev, "DMA test failed: %d\n", status);
3180 if (status == -ENOSYS)
3181 dev_warn(dev, "Falling back to ethp! "
3182 "Please install up to date fw\n");
3184 /* fall back to using the unaligned firmware */
3185 mgp->tx_boundary = 2048;
3186 set_fw_name(mgp, myri10ge_fw_unaligned, false);
3189 static void myri10ge_select_firmware(struct myri10ge_priv *mgp)
3193 if (myri10ge_force_firmware == 0) {
3197 pcie_capability_read_word(mgp->pdev, PCI_EXP_LNKSTA, &lnk);
3198 link_width = (lnk >> 4) & 0x3f;
3200 /* Check to see if Link is less than 8 or if the
3201 * upstream bridge is known to provide aligned
3203 if (link_width < 8) {
3204 dev_info(&mgp->pdev->dev, "PCIE x%d Link\n",
3206 mgp->tx_boundary = 4096;
3207 set_fw_name(mgp, myri10ge_fw_aligned, false);
3209 myri10ge_firmware_probe(mgp);
3212 if (myri10ge_force_firmware == 1) {
3213 dev_info(&mgp->pdev->dev,
3214 "Assuming aligned completions (forced)\n");
3215 mgp->tx_boundary = 4096;
3216 set_fw_name(mgp, myri10ge_fw_aligned, false);
3218 dev_info(&mgp->pdev->dev,
3219 "Assuming unaligned completions (forced)\n");
3220 mgp->tx_boundary = 2048;
3221 set_fw_name(mgp, myri10ge_fw_unaligned, false);
3225 kernel_param_lock(THIS_MODULE);
3226 if (myri10ge_fw_name != NULL) {
3227 char *fw_name = kstrdup(myri10ge_fw_name, GFP_KERNEL);
3230 set_fw_name(mgp, fw_name, true);
3233 kernel_param_unlock(THIS_MODULE);
3235 if (mgp->board_number < MYRI10GE_MAX_BOARDS &&
3236 myri10ge_fw_names[mgp->board_number] != NULL &&
3237 strlen(myri10ge_fw_names[mgp->board_number])) {
3238 set_fw_name(mgp, myri10ge_fw_names[mgp->board_number], false);
3242 dev_info(&mgp->pdev->dev, "overriding firmware to %s\n",
3246 static void myri10ge_mask_surprise_down(struct pci_dev *pdev)
3248 struct pci_dev *bridge = pdev->bus->self;
3255 cap = pci_find_ext_capability(bridge, PCI_EXT_CAP_ID_ERR);
3257 /* a sram parity error can cause a surprise link
3258 * down; since we expect and can recover from sram
3259 * parity errors, mask surprise link down events */
3260 pci_read_config_dword(bridge, cap + PCI_ERR_UNCOR_MASK, &mask);
3262 pci_write_config_dword(bridge, cap + PCI_ERR_UNCOR_MASK, mask);
3266 static int __maybe_unused myri10ge_suspend(struct device *dev)
3268 struct myri10ge_priv *mgp;
3269 struct net_device *netdev;
3271 mgp = dev_get_drvdata(dev);
3276 netif_device_detach(netdev);
3277 if (netif_running(netdev)) {
3278 netdev_info(netdev, "closing\n");
3280 myri10ge_close(netdev);
3283 myri10ge_dummy_rdma(mgp, 0);
3288 static int __maybe_unused myri10ge_resume(struct device *dev)
3290 struct pci_dev *pdev = to_pci_dev(dev);
3291 struct myri10ge_priv *mgp;
3292 struct net_device *netdev;
3296 mgp = pci_get_drvdata(pdev);
3300 msleep(5); /* give card time to respond */
3301 pci_read_config_word(mgp->pdev, PCI_VENDOR_ID, &vendor);
3302 if (vendor == 0xffff) {
3303 netdev_err(mgp->dev, "device disappeared!\n");
3307 myri10ge_reset(mgp);
3308 myri10ge_dummy_rdma(mgp, 1);
3310 if (netif_running(netdev)) {
3312 status = myri10ge_open(netdev);
3315 goto abort_with_enabled;
3318 netif_device_attach(netdev);
3326 static u32 myri10ge_read_reboot(struct myri10ge_priv *mgp)
3328 struct pci_dev *pdev = mgp->pdev;
3329 int vs = mgp->vendor_specific_offset;
3332 /*enter read32 mode */
3333 pci_write_config_byte(pdev, vs + 0x10, 0x3);
3335 /*read REBOOT_STATUS (0xfffffff0) */
3336 pci_write_config_dword(pdev, vs + 0x18, 0xfffffff0);
3337 pci_read_config_dword(pdev, vs + 0x14, &reboot);
3342 myri10ge_check_slice(struct myri10ge_slice_state *ss, int *reset_needed,
3343 int *busy_slice_cnt, u32 rx_pause_cnt)
3345 struct myri10ge_priv *mgp = ss->mgp;
3346 int slice = ss - mgp->ss;
3348 if (ss->tx.req != ss->tx.done &&
3349 ss->tx.done == ss->watchdog_tx_done &&
3350 ss->watchdog_tx_req != ss->watchdog_tx_done) {
3351 /* nic seems like it might be stuck.. */
3352 if (rx_pause_cnt != mgp->watchdog_pause) {
3353 if (net_ratelimit())
3354 netdev_warn(mgp->dev, "slice %d: TX paused, "
3355 "check link partner\n", slice);
3357 netdev_warn(mgp->dev,
3358 "slice %d: TX stuck %d %d %d %d %d %d\n",
3359 slice, ss->tx.queue_active, ss->tx.req,
3360 ss->tx.done, ss->tx.pkt_start,
3362 (int)ntohl(mgp->ss[slice].fw_stats->
3368 if (ss->watchdog_tx_done != ss->tx.done ||
3369 ss->watchdog_rx_done != ss->rx_done.cnt) {
3370 *busy_slice_cnt += 1;
3372 ss->watchdog_tx_done = ss->tx.done;
3373 ss->watchdog_tx_req = ss->tx.req;
3374 ss->watchdog_rx_done = ss->rx_done.cnt;
3378 * This watchdog is used to check whether the board has suffered
3379 * from a parity error and needs to be recovered.
3381 static void myri10ge_watchdog(struct work_struct *work)
3383 struct myri10ge_priv *mgp =
3384 container_of(work, struct myri10ge_priv, watchdog_work);
3385 struct myri10ge_slice_state *ss;
3386 u32 reboot, rx_pause_cnt;
3387 int status, rebooted;
3389 int reset_needed = 0;
3390 int busy_slice_cnt = 0;
3393 mgp->watchdog_resets++;
3394 pci_read_config_word(mgp->pdev, PCI_COMMAND, &cmd);
3396 if ((cmd & PCI_COMMAND_MASTER) == 0) {
3397 /* Bus master DMA disabled? Check to see
3398 * if the card rebooted due to a parity error
3399 * For now, just report it */
3400 reboot = myri10ge_read_reboot(mgp);
3401 netdev_err(mgp->dev, "NIC rebooted (0x%x),%s resetting\n",
3402 reboot, myri10ge_reset_recover ? "" : " not");
3403 if (myri10ge_reset_recover == 0)
3408 myri10ge_close(mgp->dev);
3409 myri10ge_reset_recover--;
3412 * A rebooted nic will come back with config space as
3413 * it was after power was applied to PCIe bus.
3414 * Attempt to restore config space which was saved
3415 * when the driver was loaded, or the last time the
3416 * nic was resumed from power saving mode.
3418 pci_restore_state(mgp->pdev);
3420 /* save state again for accounting reasons */
3421 pci_save_state(mgp->pdev);
3424 /* if we get back -1's from our slot, perhaps somebody
3425 * powered off our card. Don't try to reset it in
3427 if (cmd == 0xffff) {
3428 pci_read_config_word(mgp->pdev, PCI_VENDOR_ID, &vendor);
3429 if (vendor == 0xffff) {
3430 netdev_err(mgp->dev, "device disappeared!\n");
3434 /* Perhaps it is a software error. See if stuck slice
3435 * has recovered, reset if not */
3436 rx_pause_cnt = ntohl(mgp->ss[0].fw_stats->dropped_pause);
3437 for (i = 0; i < mgp->num_slices; i++) {
3440 myri10ge_check_slice(ss, &reset_needed,
3446 if (!reset_needed) {
3447 netdev_dbg(mgp->dev, "not resetting\n");
3451 netdev_err(mgp->dev, "device timeout, resetting\n");
3456 myri10ge_close(mgp->dev);
3458 status = myri10ge_load_firmware(mgp, 1);
3460 netdev_err(mgp->dev, "failed to load firmware\n");
3462 myri10ge_open(mgp->dev);
3467 * We use our own timer routine rather than relying upon
3468 * netdev->tx_timeout because we have a very large hardware transmit
3469 * queue. Due to the large queue, the netdev->tx_timeout function
3470 * cannot detect a NIC with a parity error in a timely fashion if the
3471 * NIC is lightly loaded.
3473 static void myri10ge_watchdog_timer(struct timer_list *t)
3475 struct myri10ge_priv *mgp;
3476 struct myri10ge_slice_state *ss;
3477 int i, reset_needed, busy_slice_cnt;
3481 mgp = from_timer(mgp, t, watchdog_timer);
3483 rx_pause_cnt = ntohl(mgp->ss[0].fw_stats->dropped_pause);
3485 for (i = 0, reset_needed = 0;
3486 i < mgp->num_slices && reset_needed == 0; ++i) {
3489 if (ss->rx_small.watchdog_needed) {
3490 myri10ge_alloc_rx_pages(mgp, &ss->rx_small,
3491 mgp->small_bytes + MXGEFW_PAD,
3493 if (ss->rx_small.fill_cnt - ss->rx_small.cnt >=
3494 myri10ge_fill_thresh)
3495 ss->rx_small.watchdog_needed = 0;
3497 if (ss->rx_big.watchdog_needed) {
3498 myri10ge_alloc_rx_pages(mgp, &ss->rx_big,
3500 if (ss->rx_big.fill_cnt - ss->rx_big.cnt >=
3501 myri10ge_fill_thresh)
3502 ss->rx_big.watchdog_needed = 0;
3504 myri10ge_check_slice(ss, &reset_needed, &busy_slice_cnt,
3507 /* if we've sent or received no traffic, poll the NIC to
3508 * ensure it is still there. Otherwise, we risk not noticing
3509 * an error in a timely fashion */
3510 if (busy_slice_cnt == 0) {
3511 pci_read_config_word(mgp->pdev, PCI_COMMAND, &cmd);
3512 if ((cmd & PCI_COMMAND_MASTER) == 0) {
3516 mgp->watchdog_pause = rx_pause_cnt;
3519 schedule_work(&mgp->watchdog_work);
3522 mod_timer(&mgp->watchdog_timer,
3523 jiffies + myri10ge_watchdog_timeout * HZ);
3527 static void myri10ge_free_slices(struct myri10ge_priv *mgp)
3529 struct myri10ge_slice_state *ss;
3530 struct pci_dev *pdev = mgp->pdev;
3534 if (mgp->ss == NULL)
3537 for (i = 0; i < mgp->num_slices; i++) {
3539 if (ss->rx_done.entry != NULL) {
3540 bytes = mgp->max_intr_slots *
3541 sizeof(*ss->rx_done.entry);
3542 dma_free_coherent(&pdev->dev, bytes,
3543 ss->rx_done.entry, ss->rx_done.bus);
3544 ss->rx_done.entry = NULL;
3546 if (ss->fw_stats != NULL) {
3547 bytes = sizeof(*ss->fw_stats);
3548 dma_free_coherent(&pdev->dev, bytes,
3549 ss->fw_stats, ss->fw_stats_bus);
3550 ss->fw_stats = NULL;
3552 __netif_napi_del(&ss->napi);
3554 /* Wait till napi structs are no longer used, and then free ss. */
3560 static int myri10ge_alloc_slices(struct myri10ge_priv *mgp)
3562 struct myri10ge_slice_state *ss;
3563 struct pci_dev *pdev = mgp->pdev;
3567 bytes = sizeof(*mgp->ss) * mgp->num_slices;
3568 mgp->ss = kzalloc(bytes, GFP_KERNEL);
3569 if (mgp->ss == NULL) {
3573 for (i = 0; i < mgp->num_slices; i++) {
3575 bytes = mgp->max_intr_slots * sizeof(*ss->rx_done.entry);
3576 ss->rx_done.entry = dma_alloc_coherent(&pdev->dev, bytes,
3579 if (ss->rx_done.entry == NULL)
3581 bytes = sizeof(*ss->fw_stats);
3582 ss->fw_stats = dma_alloc_coherent(&pdev->dev, bytes,
3585 if (ss->fw_stats == NULL)
3589 netif_napi_add(ss->dev, &ss->napi, myri10ge_poll,
3590 myri10ge_napi_weight);
3594 myri10ge_free_slices(mgp);
3599 * This function determines the number of slices supported.
3600 * The number slices is the minimum of the number of CPUS,
3601 * the number of MSI-X irqs supported, the number of slices
3602 * supported by the firmware
3604 static void myri10ge_probe_slices(struct myri10ge_priv *mgp)
3606 struct myri10ge_cmd cmd;
3607 struct pci_dev *pdev = mgp->pdev;
3610 int i, status, ncpus;
3612 mgp->num_slices = 1;
3613 ncpus = netif_get_num_default_rss_queues();
3615 if (myri10ge_max_slices == 1 || !pdev->msix_cap ||
3616 (myri10ge_max_slices == -1 && ncpus < 2))
3619 /* try to load the slice aware rss firmware */
3620 old_fw = mgp->fw_name;
3621 old_allocated = mgp->fw_name_allocated;
3622 /* don't free old_fw if we override it. */
3623 mgp->fw_name_allocated = false;
3625 if (myri10ge_fw_name != NULL) {
3626 dev_info(&mgp->pdev->dev, "overriding rss firmware to %s\n",
3628 set_fw_name(mgp, myri10ge_fw_name, false);
3629 } else if (old_fw == myri10ge_fw_aligned)
3630 set_fw_name(mgp, myri10ge_fw_rss_aligned, false);
3632 set_fw_name(mgp, myri10ge_fw_rss_unaligned, false);
3633 status = myri10ge_load_firmware(mgp, 0);
3635 dev_info(&pdev->dev, "Rss firmware not found\n");
3641 /* hit the board with a reset to ensure it is alive */
3642 memset(&cmd, 0, sizeof(cmd));
3643 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_RESET, &cmd, 0);
3645 dev_err(&mgp->pdev->dev, "failed reset\n");
3649 mgp->max_intr_slots = cmd.data0 / sizeof(struct mcp_slot);
3651 /* tell it the size of the interrupt queues */
3652 cmd.data0 = mgp->max_intr_slots * sizeof(struct mcp_slot);
3653 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_SIZE, &cmd, 0);
3655 dev_err(&mgp->pdev->dev, "failed MXGEFW_CMD_SET_INTRQ_SIZE\n");
3659 /* ask the maximum number of slices it supports */
3660 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_RSS_QUEUES, &cmd, 0);
3664 mgp->num_slices = cmd.data0;
3666 /* Only allow multiple slices if MSI-X is usable */
3667 if (!myri10ge_msi) {
3671 /* if the admin did not specify a limit to how many
3672 * slices we should use, cap it automatically to the
3673 * number of CPUs currently online */
3674 if (myri10ge_max_slices == -1)
3675 myri10ge_max_slices = ncpus;
3677 if (mgp->num_slices > myri10ge_max_slices)
3678 mgp->num_slices = myri10ge_max_slices;
3680 /* Now try to allocate as many MSI-X vectors as we have
3681 * slices. We give up on MSI-X if we can only get a single
3684 mgp->msix_vectors = kcalloc(mgp->num_slices, sizeof(*mgp->msix_vectors),
3686 if (mgp->msix_vectors == NULL)
3688 for (i = 0; i < mgp->num_slices; i++) {
3689 mgp->msix_vectors[i].entry = i;
3692 while (mgp->num_slices > 1) {
3693 mgp->num_slices = rounddown_pow_of_two(mgp->num_slices);
3694 if (mgp->num_slices == 1)
3696 status = pci_enable_msix_range(pdev,
3703 pci_disable_msix(pdev);
3705 if (status == mgp->num_slices) {
3710 mgp->num_slices = status;
3715 if (mgp->msix_vectors != NULL) {
3716 kfree(mgp->msix_vectors);
3717 mgp->msix_vectors = NULL;
3721 mgp->num_slices = 1;
3722 set_fw_name(mgp, old_fw, old_allocated);
3723 myri10ge_load_firmware(mgp, 0);
3726 static const struct net_device_ops myri10ge_netdev_ops = {
3727 .ndo_open = myri10ge_open,
3728 .ndo_stop = myri10ge_close,
3729 .ndo_start_xmit = myri10ge_xmit,
3730 .ndo_get_stats64 = myri10ge_get_stats,
3731 .ndo_validate_addr = eth_validate_addr,
3732 .ndo_change_mtu = myri10ge_change_mtu,
3733 .ndo_set_rx_mode = myri10ge_set_multicast_list,
3734 .ndo_set_mac_address = myri10ge_set_mac_address,
3737 static int myri10ge_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3739 struct net_device *netdev;
3740 struct myri10ge_priv *mgp;
3741 struct device *dev = &pdev->dev;
3742 int status = -ENXIO;
3743 unsigned hdr_offset, ss_offset;
3744 static int board_number;
3746 netdev = alloc_etherdev_mq(sizeof(*mgp), MYRI10GE_MAX_SLICES);
3750 SET_NETDEV_DEV(netdev, &pdev->dev);
3752 mgp = netdev_priv(netdev);
3755 mgp->pause = myri10ge_flow_control;
3756 mgp->intr_coal_delay = myri10ge_intr_coal_delay;
3757 mgp->msg_enable = netif_msg_init(myri10ge_debug, MYRI10GE_MSG_DEFAULT);
3758 mgp->board_number = board_number;
3759 init_waitqueue_head(&mgp->down_wq);
3761 if (pci_enable_device(pdev)) {
3762 dev_err(&pdev->dev, "pci_enable_device call failed\n");
3764 goto abort_with_netdev;
3767 /* Find the vendor-specific cap so we can check
3768 * the reboot register later on */
3769 mgp->vendor_specific_offset
3770 = pci_find_capability(pdev, PCI_CAP_ID_VNDR);
3772 /* Set our max read request to 4KB */
3773 status = pcie_set_readrq(pdev, 4096);
3775 dev_err(&pdev->dev, "Error %d writing PCI_EXP_DEVCTL\n",
3777 goto abort_with_enabled;
3780 myri10ge_mask_surprise_down(pdev);
3781 pci_set_master(pdev);
3782 status = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
3784 dev_err(&pdev->dev, "Error %d setting DMA mask\n", status);
3785 goto abort_with_enabled;
3787 mgp->cmd = dma_alloc_coherent(&pdev->dev, sizeof(*mgp->cmd),
3788 &mgp->cmd_bus, GFP_KERNEL);
3791 goto abort_with_enabled;
3794 mgp->board_span = pci_resource_len(pdev, 0);
3795 mgp->iomem_base = pci_resource_start(pdev, 0);
3796 mgp->wc_cookie = arch_phys_wc_add(mgp->iomem_base, mgp->board_span);
3797 mgp->sram = ioremap_wc(mgp->iomem_base, mgp->board_span);
3798 if (mgp->sram == NULL) {
3799 dev_err(&pdev->dev, "ioremap failed for %ld bytes at 0x%lx\n",
3800 mgp->board_span, mgp->iomem_base);
3802 goto abort_with_mtrr;
3805 swab32(readl(mgp->sram + MCP_HEADER_PTR_OFFSET)) & 0xffffc;
3806 ss_offset = hdr_offset + offsetof(struct mcp_gen_header, string_specs);
3807 mgp->sram_size = swab32(readl(mgp->sram + ss_offset));
3808 if (mgp->sram_size > mgp->board_span ||
3809 mgp->sram_size <= MYRI10GE_FW_OFFSET) {
3811 "invalid sram_size %dB or board span %ldB\n",
3812 mgp->sram_size, mgp->board_span);
3814 goto abort_with_ioremap;
3816 memcpy_fromio(mgp->eeprom_strings,
3817 mgp->sram + mgp->sram_size, MYRI10GE_EEPROM_STRINGS_SIZE);
3818 memset(mgp->eeprom_strings + MYRI10GE_EEPROM_STRINGS_SIZE - 2, 0, 2);
3819 status = myri10ge_read_mac_addr(mgp);
3821 goto abort_with_ioremap;
3823 eth_hw_addr_set(netdev, mgp->mac_addr);
3825 myri10ge_select_firmware(mgp);
3827 status = myri10ge_load_firmware(mgp, 1);
3829 dev_err(&pdev->dev, "failed to load firmware\n");
3830 goto abort_with_ioremap;
3832 myri10ge_probe_slices(mgp);
3833 status = myri10ge_alloc_slices(mgp);
3835 dev_err(&pdev->dev, "failed to alloc slice state\n");
3836 goto abort_with_firmware;
3838 netif_set_real_num_tx_queues(netdev, mgp->num_slices);
3839 netif_set_real_num_rx_queues(netdev, mgp->num_slices);
3840 status = myri10ge_reset(mgp);
3842 dev_err(&pdev->dev, "failed reset\n");
3843 goto abort_with_slices;
3845 #ifdef CONFIG_MYRI10GE_DCA
3846 myri10ge_setup_dca(mgp);
3848 pci_set_drvdata(pdev, mgp);
3850 /* MTU range: 68 - 9000 */
3851 netdev->min_mtu = ETH_MIN_MTU;
3852 netdev->max_mtu = MYRI10GE_MAX_ETHER_MTU - ETH_HLEN;
3854 if (myri10ge_initial_mtu > netdev->max_mtu)
3855 myri10ge_initial_mtu = netdev->max_mtu;
3856 if (myri10ge_initial_mtu < netdev->min_mtu)
3857 myri10ge_initial_mtu = netdev->min_mtu;
3859 netdev->mtu = myri10ge_initial_mtu;
3861 netdev->netdev_ops = &myri10ge_netdev_ops;
3862 netdev->hw_features = mgp->features | NETIF_F_RXCSUM;
3864 /* fake NETIF_F_HW_VLAN_CTAG_RX for good GRO performance */
3865 netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_RX;
3867 netdev->features = netdev->hw_features | NETIF_F_HIGHDMA;
3869 netdev->vlan_features |= mgp->features;
3870 if (mgp->fw_ver_tiny < 37)
3871 netdev->vlan_features &= ~NETIF_F_TSO6;
3872 if (mgp->fw_ver_tiny < 32)
3873 netdev->vlan_features &= ~NETIF_F_TSO;
3875 /* make sure we can get an irq, and that MSI can be
3876 * setup (if available). */
3877 status = myri10ge_request_irq(mgp);
3879 goto abort_with_slices;
3880 myri10ge_free_irq(mgp);
3882 /* Save configuration space to be restored if the
3883 * nic resets due to a parity error */
3884 pci_save_state(pdev);
3886 /* Setup the watchdog timer */
3887 timer_setup(&mgp->watchdog_timer, myri10ge_watchdog_timer, 0);
3889 netdev->ethtool_ops = &myri10ge_ethtool_ops;
3890 INIT_WORK(&mgp->watchdog_work, myri10ge_watchdog);
3891 status = register_netdev(netdev);
3893 dev_err(&pdev->dev, "register_netdev failed: %d\n", status);
3894 goto abort_with_state;
3896 if (mgp->msix_enabled)
3897 dev_info(dev, "%d MSI-X IRQs, tx bndry %d, fw %s, MTRR %s, WC Enabled\n",
3898 mgp->num_slices, mgp->tx_boundary, mgp->fw_name,
3899 (mgp->wc_cookie > 0 ? "Enabled" : "Disabled"));
3901 dev_info(dev, "%s IRQ %d, tx bndry %d, fw %s, MTRR %s, WC Enabled\n",
3902 mgp->msi_enabled ? "MSI" : "xPIC",
3903 pdev->irq, mgp->tx_boundary, mgp->fw_name,
3904 (mgp->wc_cookie > 0 ? "Enabled" : "Disabled"));
3910 pci_restore_state(pdev);
3913 myri10ge_free_slices(mgp);
3915 abort_with_firmware:
3916 myri10ge_dummy_rdma(mgp, 0);
3919 if (mgp->mac_addr_string != NULL)
3921 "myri10ge_probe() failed: MAC=%s, SN=%ld\n",
3922 mgp->mac_addr_string, mgp->serial_number);
3926 arch_phys_wc_del(mgp->wc_cookie);
3927 dma_free_coherent(&pdev->dev, sizeof(*mgp->cmd),
3928 mgp->cmd, mgp->cmd_bus);
3931 pci_disable_device(pdev);
3934 set_fw_name(mgp, NULL, false);
3935 free_netdev(netdev);
3942 * Does what is necessary to shutdown one Myrinet device. Called
3943 * once for each Myrinet card by the kernel when a module is
3946 static void myri10ge_remove(struct pci_dev *pdev)
3948 struct myri10ge_priv *mgp;
3949 struct net_device *netdev;
3951 mgp = pci_get_drvdata(pdev);
3955 cancel_work_sync(&mgp->watchdog_work);
3957 unregister_netdev(netdev);
3959 #ifdef CONFIG_MYRI10GE_DCA
3960 myri10ge_teardown_dca(mgp);
3962 myri10ge_dummy_rdma(mgp, 0);
3964 /* avoid a memory leak */
3965 pci_restore_state(pdev);
3968 arch_phys_wc_del(mgp->wc_cookie);
3969 myri10ge_free_slices(mgp);
3970 kfree(mgp->msix_vectors);
3971 dma_free_coherent(&pdev->dev, sizeof(*mgp->cmd),
3972 mgp->cmd, mgp->cmd_bus);
3974 set_fw_name(mgp, NULL, false);
3975 free_netdev(netdev);
3976 pci_disable_device(pdev);
3979 #define PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E 0x0008
3980 #define PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E_9 0x0009
3982 static const struct pci_device_id myri10ge_pci_tbl[] = {
3983 {PCI_DEVICE(PCI_VENDOR_ID_MYRICOM, PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E)},
3985 (PCI_VENDOR_ID_MYRICOM, PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E_9)},
3989 MODULE_DEVICE_TABLE(pci, myri10ge_pci_tbl);
3991 static SIMPLE_DEV_PM_OPS(myri10ge_pm_ops, myri10ge_suspend, myri10ge_resume);
3993 static struct pci_driver myri10ge_driver = {
3995 .probe = myri10ge_probe,
3996 .remove = myri10ge_remove,
3997 .id_table = myri10ge_pci_tbl,
3998 .driver.pm = &myri10ge_pm_ops,
4001 #ifdef CONFIG_MYRI10GE_DCA
4003 myri10ge_notify_dca(struct notifier_block *nb, unsigned long event, void *p)
4005 int err = driver_for_each_device(&myri10ge_driver.driver,
4007 myri10ge_notify_dca_device);
4014 static struct notifier_block myri10ge_dca_notifier = {
4015 .notifier_call = myri10ge_notify_dca,
4019 #endif /* CONFIG_MYRI10GE_DCA */
4021 static __init int myri10ge_init_module(void)
4023 pr_info("Version %s\n", MYRI10GE_VERSION_STR);
4025 if (myri10ge_rss_hash > MXGEFW_RSS_HASH_TYPE_MAX) {
4026 pr_err("Illegal rssh hash type %d, defaulting to source port\n",
4028 myri10ge_rss_hash = MXGEFW_RSS_HASH_TYPE_SRC_PORT;
4030 #ifdef CONFIG_MYRI10GE_DCA
4031 dca_register_notify(&myri10ge_dca_notifier);
4033 if (myri10ge_max_slices > MYRI10GE_MAX_SLICES)
4034 myri10ge_max_slices = MYRI10GE_MAX_SLICES;
4036 return pci_register_driver(&myri10ge_driver);
4039 module_init(myri10ge_init_module);
4041 static __exit void myri10ge_cleanup_module(void)
4043 #ifdef CONFIG_MYRI10GE_DCA
4044 dca_unregister_notify(&myri10ge_dca_notifier);
4046 pci_unregister_driver(&myri10ge_driver);
4049 module_exit(myri10ge_cleanup_module);