drivers/net/sfc/falcon.c

   1 /****************************************************************************
   2  * Driver for Solarflare Solarstorm network controllers and boards
   3  * Copyright 2005-2006 Fen Systems Ltd.
   4  * Copyright 2006-2009 Solarflare Communications Inc.
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 as published
   8  * by the Free Software Foundation, incorporated herein by reference.
   9  */
  10
  11 #include <linux/bitops.h>
  12 #include <linux/delay.h>
  13 #include <linux/pci.h>
  14 #include <linux/module.h>
  15 #include <linux/seq_file.h>
  16 #include <linux/i2c.h>
  17 #include <linux/mii.h>
  18 #include <linux/slab.h>
  19 #include "net_driver.h"
  20 #include "bitfield.h"
  21 #include "efx.h"
  22 #include "mac.h"
  23 #include "spi.h"
  24 #include "nic.h"
  25 #include "regs.h"
  26 #include "io.h"
  27 #include "mdio_10g.h"
  28 #include "phy.h"
  29 #include "workarounds.h"
  30
  31 /* Hardware control for SFC4000 (aka Falcon). */
  32
  33 static const unsigned int
  34 /* "Large" EEPROM device: Atmel AT25640 or similar
  35  * 8 KB, 16-bit address, 32 B write block */
  36 large_eeprom_type = ((13 << SPI_DEV_TYPE_SIZE_LBN)
  37                      | (2 << SPI_DEV_TYPE_ADDR_LEN_LBN)
  38                      | (5 << SPI_DEV_TYPE_BLOCK_SIZE_LBN)),
  39 /* Default flash device: Atmel AT25F1024
  40  * 128 KB, 24-bit address, 32 KB erase block, 256 B write block */
  41 default_flash_type = ((17 << SPI_DEV_TYPE_SIZE_LBN)
  42                       | (3 << SPI_DEV_TYPE_ADDR_LEN_LBN)
  43                       | (0x52 << SPI_DEV_TYPE_ERASE_CMD_LBN)
  44                       | (15 << SPI_DEV_TYPE_ERASE_SIZE_LBN)
  45                       | (8 << SPI_DEV_TYPE_BLOCK_SIZE_LBN));
  46
  47 /**************************************************************************
  48  *
  49  * I2C bus - this is a bit-bashing interface using GPIO pins
  50  * Note that it uses the output enables to tristate the outputs
  51  * SDA is the data pin and SCL is the clock
  52  *
  53  **************************************************************************
  54  */
  55 static void falcon_setsda(void *data, int state)
  56 {
  57         struct efx_nic *efx = (struct efx_nic *)data;
  58         efx_oword_t reg;
  59
  60         efx_reado(efx, &reg, FR_AB_GPIO_CTL);
  61         EFX_SET_OWORD_FIELD(reg, FRF_AB_GPIO3_OEN, !state);
  62         efx_writeo(efx, &reg, FR_AB_GPIO_CTL);
  63 }
  64
  65 static void falcon_setscl(void *data, int state)
  66 {
  67         struct efx_nic *efx = (struct efx_nic *)data;
  68         efx_oword_t reg;
  69
  70         efx_reado(efx, &reg, FR_AB_GPIO_CTL);
  71         EFX_SET_OWORD_FIELD(reg, FRF_AB_GPIO0_OEN, !state);
  72         efx_writeo(efx, &reg, FR_AB_GPIO_CTL);
  73 }
  74
  75 static int falcon_getsda(void *data)
  76 {
  77         struct efx_nic *efx = (struct efx_nic *)data;
  78         efx_oword_t reg;
  79
  80         efx_reado(efx, &reg, FR_AB_GPIO_CTL);
  81         return EFX_OWORD_FIELD(reg, FRF_AB_GPIO3_IN);
  82 }
  83
  84 static int falcon_getscl(void *data)
  85 {
  86         struct efx_nic *efx = (struct efx_nic *)data;
  87         efx_oword_t reg;
  88
  89         efx_reado(efx, &reg, FR_AB_GPIO_CTL);
  90         return EFX_OWORD_FIELD(reg, FRF_AB_GPIO0_IN);
  91 }
  92
  93 static struct i2c_algo_bit_data falcon_i2c_bit_operations = {
  94         .setsda         = falcon_setsda,
  95         .setscl         = falcon_setscl,
  96         .getsda         = falcon_getsda,
  97         .getscl         = falcon_getscl,
  98         .udelay         = 5,
  99         /* Wait up to 50 ms for slave to let us pull SCL high */
 100         .timeout        = DIV_ROUND_UP(HZ, 20),
 101 };
 102
 103 static void falcon_push_irq_moderation(struct efx_channel *channel)
 104 {
 105         efx_dword_t timer_cmd;
 106         struct efx_nic *efx = channel->efx;
 107
 108         /* Set timer register */
 109         if (channel->irq_moderation) {
 110                 EFX_POPULATE_DWORD_2(timer_cmd,
 111                                      FRF_AB_TC_TIMER_MODE,
 112                                      FFE_BB_TIMER_MODE_INT_HLDOFF,
 113                                      FRF_AB_TC_TIMER_VAL,
 114                                      channel->irq_moderation - 1);
 115         } else {
 116                 EFX_POPULATE_DWORD_2(timer_cmd,
 117                                      FRF_AB_TC_TIMER_MODE,
 118                                      FFE_BB_TIMER_MODE_DIS,
 119                                      FRF_AB_TC_TIMER_VAL, 0);
 120         }
 121         BUILD_BUG_ON(FR_AA_TIMER_COMMAND_KER != FR_BZ_TIMER_COMMAND_P0);
 122         efx_writed_page_locked(efx, &timer_cmd, FR_BZ_TIMER_COMMAND_P0,
 123                                channel->channel);
 124 }
 125
 126 static void falcon_deconfigure_mac_wrapper(struct efx_nic *efx);
 127
 128 static void falcon_prepare_flush(struct efx_nic *efx)
 129 {
 130         falcon_deconfigure_mac_wrapper(efx);
 131
 132         /* Wait for the tx and rx fifo's to get to the next packet boundary
 133          * (~1ms without back-pressure), then to drain the remainder of the
 134          * fifo's at data path speeds (negligible), with a healthy margin. */
 135         msleep(10);
 136 }
 137
 138 /* Acknowledge a legacy interrupt from Falcon
 139  *
 140  * This acknowledges a legacy (not MSI) interrupt via INT_ACK_KER_REG.
 141  *
 142  * Due to SFC bug 3706 (silicon revision <=A1) reads can be duplicated in the
 143  * BIU. Interrupt acknowledge is read sensitive so must write instead
 144  * (then read to ensure the BIU collector is flushed)
 145  *
 146  * NB most hardware supports MSI interrupts
 147  */
 148 inline void falcon_irq_ack_a1(struct efx_nic *efx)
 149 {
 150         efx_dword_t reg;
 151
 152         EFX_POPULATE_DWORD_1(reg, FRF_AA_INT_ACK_KER_FIELD, 0xb7eb7e);
 153         efx_writed(efx, &reg, FR_AA_INT_ACK_KER);
 154         efx_readd(efx, &reg, FR_AA_WORK_AROUND_BROKEN_PCI_READS);
 155 }
 156
 157
 158 irqreturn_t falcon_legacy_interrupt_a1(int irq, void *dev_id)
 159 {
 160         struct efx_nic *efx = dev_id;
 161         efx_oword_t *int_ker = efx->irq_status.addr;
 162         int syserr;
 163         int queues;
 164
 165         /* Check to see if this is our interrupt.  If it isn't, we
 166          * exit without having touched the hardware.
 167          */
 168         if (unlikely(EFX_OWORD_IS_ZERO(*int_ker))) {
 169                 netif_vdbg(efx, intr, efx->net_dev,
 170                            "IRQ %d on CPU %d not for me\n", irq,
 171                            raw_smp_processor_id());
 172                 return IRQ_NONE;
 173         }
 174         efx->last_irq_cpu = raw_smp_processor_id();
 175         netif_vdbg(efx, intr, efx->net_dev,
 176                    "IRQ %d on CPU %d status " EFX_OWORD_FMT "\n",
 177                    irq, raw_smp_processor_id(), EFX_OWORD_VAL(*int_ker));
 178
 179         /* Determine interrupting queues, clear interrupt status
 180          * register and acknowledge the device interrupt.
 181          */
 182         BUILD_BUG_ON(FSF_AZ_NET_IVEC_INT_Q_WIDTH > EFX_MAX_CHANNELS);
 183         queues = EFX_OWORD_FIELD(*int_ker, FSF_AZ_NET_IVEC_INT_Q);
 184
 185         /* Check to see if we have a serious error condition */
 186         if (queues & (1U << efx->fatal_irq_level)) {
 187                 syserr = EFX_OWORD_FIELD(*int_ker, FSF_AZ_NET_IVEC_FATAL_INT);
 188                 if (unlikely(syserr))
 189                         return efx_nic_fatal_interrupt(efx);
 190         }
 191
 192         EFX_ZERO_OWORD(*int_ker);
 193         wmb(); /* Ensure the vector is cleared before interrupt ack */
 194         falcon_irq_ack_a1(efx);
 195
 196         if (queues & 1)
 197                 efx_schedule_channel(efx_get_channel(efx, 0));
 198         if (queues & 2)
 199                 efx_schedule_channel(efx_get_channel(efx, 1));
 200         return IRQ_HANDLED;
 201 }
 202 /**************************************************************************
 203  *
 204  * EEPROM/flash
 205  *
 206  **************************************************************************
 207  */
 208
 209 #define FALCON_SPI_MAX_LEN sizeof(efx_oword_t)
 210
 211 static int falcon_spi_poll(struct efx_nic *efx)
 212 {
 213         efx_oword_t reg;
 214         efx_reado(efx, &reg, FR_AB_EE_SPI_HCMD);
 215         return EFX_OWORD_FIELD(reg, FRF_AB_EE_SPI_HCMD_CMD_EN) ? -EBUSY : 0;
 216 }
 217
 218 /* Wait for SPI command completion */
 219 static int falcon_spi_wait(struct efx_nic *efx)
 220 {
 221         /* Most commands will finish quickly, so we start polling at
 222          * very short intervals.  Sometimes the command may have to
 223          * wait for VPD or expansion ROM access outside of our
 224          * control, so we allow up to 100 ms. */
 225         unsigned long timeout = jiffies + 1 + DIV_ROUND_UP(HZ, 10);
 226         int i;
 227
 228         for (i = 0; i < 10; i++) {
 229                 if (!falcon_spi_poll(efx))
 230                         return 0;
 231                 udelay(10);
 232         }
 233
 234         for (;;) {
 235                 if (!falcon_spi_poll(efx))
 236                         return 0;
 237                 if (time_after_eq(jiffies, timeout)) {
 238                         netif_err(efx, hw, efx->net_dev,
 239                                   "timed out waiting for SPI\n");
 240                         return -ETIMEDOUT;
 241                 }
 242                 schedule_timeout_uninterruptible(1);
 243         }
 244 }
 245
 246 int falcon_spi_cmd(struct efx_nic *efx, const struct efx_spi_device *spi,
 247                    unsigned int command, int address,
 248                    const void *in, void *out, size_t len)
 249 {
 250         bool addressed = (address >= 0);
 251         bool reading = (out != NULL);
 252         efx_oword_t reg;
 253         int rc;
 254
 255         /* Input validation */
 256         if (len > FALCON_SPI_MAX_LEN)
 257                 return -EINVAL;
 258         BUG_ON(!mutex_is_locked(&efx->spi_lock));
 259
 260         /* Check that previous command is not still running */
 261         rc = falcon_spi_poll(efx);
 262         if (rc)
 263                 return rc;
 264
 265         /* Program address register, if we have an address */
 266         if (addressed) {
 267                 EFX_POPULATE_OWORD_1(reg, FRF_AB_EE_SPI_HADR_ADR, address);
 268                 efx_writeo(efx, &reg, FR_AB_EE_SPI_HADR);
 269         }
 270
 271         /* Program data register, if we have data */
 272         if (in != NULL) {
 273                 memcpy(&reg, in, len);
 274                 efx_writeo(efx, &reg, FR_AB_EE_SPI_HDATA);
 275         }
 276
 277         /* Issue read/write command */
 278         EFX_POPULATE_OWORD_7(reg,
 279                              FRF_AB_EE_SPI_HCMD_CMD_EN, 1,
 280                              FRF_AB_EE_SPI_HCMD_SF_SEL, spi->device_id,
 281                              FRF_AB_EE_SPI_HCMD_DABCNT, len,
 282                              FRF_AB_EE_SPI_HCMD_READ, reading,
 283                              FRF_AB_EE_SPI_HCMD_DUBCNT, 0,
 284                              FRF_AB_EE_SPI_HCMD_ADBCNT,
 285                              (addressed ? spi->addr_len : 0),
 286                              FRF_AB_EE_SPI_HCMD_ENC, command);
 287         efx_writeo(efx, &reg, FR_AB_EE_SPI_HCMD);
 288
 289         /* Wait for read/write to complete */
 290         rc = falcon_spi_wait(efx);
 291         if (rc)
 292                 return rc;
 293
 294         /* Read data */
 295         if (out != NULL) {
 296                 efx_reado(efx, &reg, FR_AB_EE_SPI_HDATA);
 297                 memcpy(out, &reg, len);
 298         }
 299
 300         return 0;
 301 }
 302
 303 static size_t
 304 falcon_spi_write_limit(const struct efx_spi_device *spi, size_t start)
 305 {
 306         return min(FALCON_SPI_MAX_LEN,
 307                    (spi->block_size - (start & (spi->block_size - 1))));
 308 }
 309
 310 static inline u8
 311 efx_spi_munge_command(const struct efx_spi_device *spi,
 312                       const u8 command, const unsigned int address)
 313 {
 314         return command | (((address >> 8) & spi->munge_address) << 3);
 315 }
 316
 317 /* Wait up to 10 ms for buffered write completion */
 318 int
 319 falcon_spi_wait_write(struct efx_nic *efx, const struct efx_spi_device *spi)
 320 {
 321         unsigned long timeout = jiffies + 1 + DIV_ROUND_UP(HZ, 100);
 322         u8 status;
 323         int rc;
 324
 325         for (;;) {
 326                 rc = falcon_spi_cmd(efx, spi, SPI_RDSR, -1, NULL,
 327                                     &status, sizeof(status));
 328                 if (rc)
 329                         return rc;
 330                 if (!(status & SPI_STATUS_NRDY))
 331                         return 0;
 332                 if (time_after_eq(jiffies, timeout)) {
 333                         netif_err(efx, hw, efx->net_dev,
 334                                   "SPI write timeout on device %d"
 335                                   " last status=0x%02x\n",
 336                                   spi->device_id, status);
 337                         return -ETIMEDOUT;
 338                 }
 339                 schedule_timeout_uninterruptible(1);
 340         }
 341 }
 342
 343 int falcon_spi_read(struct efx_nic *efx, const struct efx_spi_device *spi,
 344                     loff_t start, size_t len, size_t *retlen, u8 *buffer)
 345 {
 346         size_t block_len, pos = 0;
 347         unsigned int command;
 348         int rc = 0;
 349
 350         while (pos < len) {
 351                 block_len = min(len - pos, FALCON_SPI_MAX_LEN);
 352
 353                 command = efx_spi_munge_command(spi, SPI_READ, start + pos);
 354                 rc = falcon_spi_cmd(efx, spi, command, start + pos, NULL,
 355                                     buffer + pos, block_len);
 356                 if (rc)
 357                         break;
 358                 pos += block_len;
 359
 360                 /* Avoid locking up the system */
 361                 cond_resched();
 362                 if (signal_pending(current)) {
 363                         rc = -EINTR;
 364                         break;
 365                 }
 366         }
 367
 368         if (retlen)
 369                 *retlen = pos;
 370         return rc;
 371 }
 372
 373 int
 374 falcon_spi_write(struct efx_nic *efx, const struct efx_spi_device *spi,
 375                  loff_t start, size_t len, size_t *retlen, const u8 *buffer)
 376 {
 377         u8 verify_buffer[FALCON_SPI_MAX_LEN];
 378         size_t block_len, pos = 0;
 379         unsigned int command;
 380         int rc = 0;
 381
 382         while (pos < len) {
 383                 rc = falcon_spi_cmd(efx, spi, SPI_WREN, -1, NULL, NULL, 0);
 384                 if (rc)
 385                         break;
 386
 387                 block_len = min(len - pos,
 388                                 falcon_spi_write_limit(spi, start + pos));
 389                 command = efx_spi_munge_command(spi, SPI_WRITE, start + pos);
 390                 rc = falcon_spi_cmd(efx, spi, command, start + pos,
 391                                     buffer + pos, NULL, block_len);
 392                 if (rc)
 393                         break;
 394
 395                 rc = falcon_spi_wait_write(efx, spi);
 396                 if (rc)
 397                         break;
 398
 399                 command = efx_spi_munge_command(spi, SPI_READ, start + pos);
 400                 rc = falcon_spi_cmd(efx, spi, command, start + pos,
 401                                     NULL, verify_buffer, block_len);
 402                 if (memcmp(verify_buffer, buffer + pos, block_len)) {
 403                         rc = -EIO;
 404                         break;
 405                 }
 406
 407                 pos += block_len;
 408
 409                 /* Avoid locking up the system */
 410                 cond_resched();
 411                 if (signal_pending(current)) {
 412                         rc = -EINTR;
 413                         break;
 414                 }
 415         }
 416
 417         if (retlen)
 418                 *retlen = pos;
 419         return rc;
 420 }
 421
 422 /**************************************************************************
 423  *
 424  * MAC wrapper
 425  *
 426  **************************************************************************
 427  */
 428
 429 static void falcon_push_multicast_hash(struct efx_nic *efx)
 430 {
 431         union efx_multicast_hash *mc_hash = &efx->multicast_hash;
 432
 433         WARN_ON(!mutex_is_locked(&efx->mac_lock));
 434
 435         efx_writeo(efx, &mc_hash->oword[0], FR_AB_MAC_MC_HASH_REG0);
 436         efx_writeo(efx, &mc_hash->oword[1], FR_AB_MAC_MC_HASH_REG1);
 437 }
 438
 439 static void falcon_reset_macs(struct efx_nic *efx)
 440 {
 441         struct falcon_nic_data *nic_data = efx->nic_data;
 442         efx_oword_t reg, mac_ctrl;
 443         int count;
 444
 445         if (efx_nic_rev(efx) < EFX_REV_FALCON_B0) {
 446                 /* It's not safe to use GLB_CTL_REG to reset the
 447                  * macs, so instead use the internal MAC resets
 448                  */
 449                 EFX_POPULATE_OWORD_1(reg, FRF_AB_XM_CORE_RST, 1);
 450                 efx_writeo(efx, &reg, FR_AB_XM_GLB_CFG);
 451
 452                 for (count = 0; count < 10000; count++) {
 453                         efx_reado(efx, &reg, FR_AB_XM_GLB_CFG);
 454                         if (EFX_OWORD_FIELD(reg, FRF_AB_XM_CORE_RST) ==
 455                             0)
 456                                 return;
 457                         udelay(10);
 458                 }
 459
 460                 netif_err(efx, hw, efx->net_dev,
 461                           "timed out waiting for XMAC core reset\n");
 462         }
 463
 464         /* Mac stats will fail whist the TX fifo is draining */
 465         WARN_ON(nic_data->stats_disable_count == 0);
 466
 467         efx_reado(efx, &mac_ctrl, FR_AB_MAC_CTRL);
 468         EFX_SET_OWORD_FIELD(mac_ctrl, FRF_BB_TXFIFO_DRAIN_EN, 1);
 469         efx_writeo(efx, &mac_ctrl, FR_AB_MAC_CTRL);
 470
 471         efx_reado(efx, &reg, FR_AB_GLB_CTL);
 472         EFX_SET_OWORD_FIELD(reg, FRF_AB_RST_XGTX, 1);
 473         EFX_SET_OWORD_FIELD(reg, FRF_AB_RST_XGRX, 1);
 474         EFX_SET_OWORD_FIELD(reg, FRF_AB_RST_EM, 1);
 475         efx_writeo(efx, &reg, FR_AB_GLB_CTL);
 476
 477         count = 0;
 478         while (1) {
 479                 efx_reado(efx, &reg, FR_AB_GLB_CTL);
 480                 if (!EFX_OWORD_FIELD(reg, FRF_AB_RST_XGTX) &&
 481                     !EFX_OWORD_FIELD(reg, FRF_AB_RST_XGRX) &&
 482                     !EFX_OWORD_FIELD(reg, FRF_AB_RST_EM)) {
 483                         netif_dbg(efx, hw, efx->net_dev,
 484                                   "Completed MAC reset after %d loops\n",
 485                                   count);
 486                         break;
 487                 }
 488                 if (count > 20) {
 489                         netif_err(efx, hw, efx->net_dev, "MAC reset failed\n");
 490                         break;
 491                 }
 492                 count++;
 493                 udelay(10);
 494         }
 495
 496         /* Ensure the correct MAC is selected before statistics
 497          * are re-enabled by the caller */
 498         efx_writeo(efx, &mac_ctrl, FR_AB_MAC_CTRL);
 499
 500         falcon_setup_xaui(efx);
 501 }
 502
 503 void falcon_drain_tx_fifo(struct efx_nic *efx)
 504 {
 505         efx_oword_t reg;
 506
 507         if ((efx_nic_rev(efx) < EFX_REV_FALCON_B0) ||
 508             (efx->loopback_mode != LOOPBACK_NONE))
 509                 return;
 510
 511         efx_reado(efx, &reg, FR_AB_MAC_CTRL);
 512         /* There is no point in draining more than once */
 513         if (EFX_OWORD_FIELD(reg, FRF_BB_TXFIFO_DRAIN_EN))
 514                 return;
 515
 516         falcon_reset_macs(efx);
 517 }
 518
 519 static void falcon_deconfigure_mac_wrapper(struct efx_nic *efx)
 520 {
 521         efx_oword_t reg;
 522
 523         if (efx_nic_rev(efx) < EFX_REV_FALCON_B0)
 524                 return;
 525
 526         /* Isolate the MAC -> RX */
 527         efx_reado(efx, &reg, FR_AZ_RX_CFG);
 528         EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_INGR_EN, 0);
 529         efx_writeo(efx, &reg, FR_AZ_RX_CFG);
 530
 531         /* Isolate TX -> MAC */
 532         falcon_drain_tx_fifo(efx);
 533 }
 534
 535 void falcon_reconfigure_mac_wrapper(struct efx_nic *efx)
 536 {
 537         struct efx_link_state *link_state = &efx->link_state;
 538         efx_oword_t reg;
 539         int link_speed, isolate;
 540
 541         isolate = (efx->reset_pending != RESET_TYPE_NONE);
 542
 543         switch (link_state->speed) {
 544         case 10000: link_speed = 3; break;
 545         case 1000:  link_speed = 2; break;
 546         case 100:   link_speed = 1; break;
 547         default:    link_speed = 0; break;
 548         }
 549         /* MAC_LINK_STATUS controls MAC backpressure but doesn't work
 550          * as advertised.  Disable to ensure packets are not
 551          * indefinitely held and TX queue can be flushed at any point
 552          * while the link is down. */
 553         EFX_POPULATE_OWORD_5(reg,
 554                              FRF_AB_MAC_XOFF_VAL, 0xffff /* max pause time */,
 555                              FRF_AB_MAC_BCAD_ACPT, 1,
 556                              FRF_AB_MAC_UC_PROM, efx->promiscuous,
 557                              FRF_AB_MAC_LINK_STATUS, 1, /* always set */
 558                              FRF_AB_MAC_SPEED, link_speed);
 559         /* On B0, MAC backpressure can be disabled and packets get
 560          * discarded. */
 561         if (efx_nic_rev(efx) >= EFX_REV_FALCON_B0) {
 562                 EFX_SET_OWORD_FIELD(reg, FRF_BB_TXFIFO_DRAIN_EN,
 563                                     !link_state->up || isolate);
 564         }
 565
 566         efx_writeo(efx, &reg, FR_AB_MAC_CTRL);
 567
 568         /* Restore the multicast hash registers. */
 569         falcon_push_multicast_hash(efx);
 570
 571         efx_reado(efx, &reg, FR_AZ_RX_CFG);
 572         /* Enable XOFF signal from RX FIFO (we enabled it during NIC
 573          * initialisation but it may read back as 0) */
 574         EFX_SET_OWORD_FIELD(reg, FRF_AZ_RX_XOFF_MAC_EN, 1);
 575         /* Unisolate the MAC -> RX */
 576         if (efx_nic_rev(efx) >= EFX_REV_FALCON_B0)
 577                 EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_INGR_EN, !isolate);
 578         efx_writeo(efx, &reg, FR_AZ_RX_CFG);
 579 }
 580
 581 static void falcon_stats_request(struct efx_nic *efx)
 582 {
 583         struct falcon_nic_data *nic_data = efx->nic_data;
 584         efx_oword_t reg;
 585
 586         WARN_ON(nic_data->stats_pending);
 587         WARN_ON(nic_data->stats_disable_count);
 588
 589         if (nic_data->stats_dma_done == NULL)
 590                 return; /* no mac selected */
 591
 592         *nic_data->stats_dma_done = FALCON_STATS_NOT_DONE;
 593         nic_data->stats_pending = true;
 594         wmb(); /* ensure done flag is clear */
 595
 596         /* Initiate DMA transfer of stats */
 597         EFX_POPULATE_OWORD_2(reg,
 598                              FRF_AB_MAC_STAT_DMA_CMD, 1,
 599                              FRF_AB_MAC_STAT_DMA_ADR,
 600                              efx->stats_buffer.dma_addr);
 601         efx_writeo(efx, &reg, FR_AB_MAC_STAT_DMA);
 602
 603         mod_timer(&nic_data->stats_timer, round_jiffies_up(jiffies + HZ / 2));
 604 }
 605
 606 static void falcon_stats_complete(struct efx_nic *efx)
 607 {
 608         struct falcon_nic_data *nic_data = efx->nic_data;
 609
 610         if (!nic_data->stats_pending)
 611                 return;
 612
 613         nic_data->stats_pending = 0;
 614         if (*nic_data->stats_dma_done == FALCON_STATS_DONE) {
 615                 rmb(); /* read the done flag before the stats */
 616                 efx->mac_op->update_stats(efx);
 617         } else {
 618                 netif_err(efx, hw, efx->net_dev,
 619                           "timed out waiting for statistics\n");
 620         }
 621 }
 622
 623 static void falcon_stats_timer_func(unsigned long context)
 624 {
 625         struct efx_nic *efx = (struct efx_nic *)context;
 626         struct falcon_nic_data *nic_data = efx->nic_data;
 627
 628         spin_lock(&efx->stats_lock);
 629
 630         falcon_stats_complete(efx);
 631         if (nic_data->stats_disable_count == 0)
 632                 falcon_stats_request(efx);
 633
 634         spin_unlock(&efx->stats_lock);
 635 }
 636
 637 static bool falcon_loopback_link_poll(struct efx_nic *efx)
 638 {
 639         struct efx_link_state old_state = efx->link_state;
 640
 641         WARN_ON(!mutex_is_locked(&efx->mac_lock));
 642         WARN_ON(!LOOPBACK_INTERNAL(efx));
 643
 644         efx->link_state.fd = true;
 645         efx->link_state.fc = efx->wanted_fc;
 646         efx->link_state.up = true;
 647         efx->link_state.speed = 10000;
 648
 649         return !efx_link_state_equal(&efx->link_state, &old_state);
 650 }
 651
 652 static int falcon_reconfigure_port(struct efx_nic *efx)
 653 {
 654         int rc;
 655
 656         WARN_ON(efx_nic_rev(efx) > EFX_REV_FALCON_B0);
 657
 658         /* Poll the PHY link state *before* reconfiguring it. This means we
 659          * will pick up the correct speed (in loopback) to select the correct
 660          * MAC.
 661          */
 662         if (LOOPBACK_INTERNAL(efx))
 663                 falcon_loopback_link_poll(efx);
 664         else
 665                 efx->phy_op->poll(efx);
 666
 667         falcon_stop_nic_stats(efx);
 668         falcon_deconfigure_mac_wrapper(efx);
 669
 670         falcon_reset_macs(efx);
 671
 672         efx->phy_op->reconfigure(efx);
 673         rc = efx->mac_op->reconfigure(efx);
 674         BUG_ON(rc);
 675
 676         falcon_start_nic_stats(efx);
 677
 678         /* Synchronise efx->link_state with the kernel */
 679         efx_link_status_changed(efx);
 680
 681         return 0;
 682 }
 683
 684 /**************************************************************************
 685  *
 686  * PHY access via GMII
 687  *
 688  **************************************************************************
 689  */
 690
 691 /* Wait for GMII access to complete */
 692 static int falcon_gmii_wait(struct efx_nic *efx)
 693 {
 694         efx_oword_t md_stat;
 695         int count;
 696
 697         /* wait upto 50ms - taken max from datasheet */
 698         for (count = 0; count < 5000; count++) {
 699                 efx_reado(efx, &md_stat, FR_AB_MD_STAT);
 700                 if (EFX_OWORD_FIELD(md_stat, FRF_AB_MD_BSY) == 0) {
 701                         if (EFX_OWORD_FIELD(md_stat, FRF_AB_MD_LNFL) != 0 ||
 702                             EFX_OWORD_FIELD(md_stat, FRF_AB_MD_BSERR) != 0) {
 703                                 netif_err(efx, hw, efx->net_dev,
 704                                           "error from GMII access "
 705                                           EFX_OWORD_FMT"\n",
 706                                           EFX_OWORD_VAL(md_stat));
 707                                 return -EIO;
 708                         }
 709                         return 0;
 710                 }
 711                 udelay(10);
 712         }
 713         netif_err(efx, hw, efx->net_dev, "timed out waiting for GMII\n");
 714         return -ETIMEDOUT;
 715 }
 716
 717 /* Write an MDIO register of a PHY connected to Falcon. */
 718 static int falcon_mdio_write(struct net_device *net_dev,
 719                              int prtad, int devad, u16 addr, u16 value)
 720 {
 721         struct efx_nic *efx = netdev_priv(net_dev);
 722         efx_oword_t reg;
 723         int rc;
 724
 725         netif_vdbg(efx, hw, efx->net_dev,
 726                    "writing MDIO %d register %d.%d with 0x%04x\n",
 727                     prtad, devad, addr, value);
 728
 729         mutex_lock(&efx->mdio_lock);
 730
 731         /* Check MDIO not currently being accessed */
 732         rc = falcon_gmii_wait(efx);
 733         if (rc)
 734                 goto out;
 735
 736         /* Write the address/ID register */
 737         EFX_POPULATE_OWORD_1(reg, FRF_AB_MD_PHY_ADR, addr);
 738         efx_writeo(efx, &reg, FR_AB_MD_PHY_ADR);
 739
 740         EFX_POPULATE_OWORD_2(reg, FRF_AB_MD_PRT_ADR, prtad,
 741                              FRF_AB_MD_DEV_ADR, devad);
 742         efx_writeo(efx, &reg, FR_AB_MD_ID);
 743
 744         /* Write data */
 745         EFX_POPULATE_OWORD_1(reg, FRF_AB_MD_TXD, value);
 746         efx_writeo(efx, &reg, FR_AB_MD_TXD);
 747
 748         EFX_POPULATE_OWORD_2(reg,
 749                              FRF_AB_MD_WRC, 1,
 750                              FRF_AB_MD_GC, 0);
 751         efx_writeo(efx, &reg, FR_AB_MD_CS);
 752
 753         /* Wait for data to be written */
 754         rc = falcon_gmii_wait(efx);
 755         if (rc) {
 756                 /* Abort the write operation */
 757                 EFX_POPULATE_OWORD_2(reg,
 758                                      FRF_AB_MD_WRC, 0,
 759                                      FRF_AB_MD_GC, 1);
 760                 efx_writeo(efx, &reg, FR_AB_MD_CS);
 761                 udelay(10);
 762         }
 763
 764 out:
 765         mutex_unlock(&efx->mdio_lock);
 766         return rc;
 767 }
 768
 769 /* Read an MDIO register of a PHY connected to Falcon. */
 770 static int falcon_mdio_read(struct net_device *net_dev,
 771                             int prtad, int devad, u16 addr)
 772 {
 773         struct efx_nic *efx = netdev_priv(net_dev);
 774         efx_oword_t reg;
 775         int rc;
 776
 777         mutex_lock(&efx->mdio_lock);
 778
 779         /* Check MDIO not currently being accessed */
 780         rc = falcon_gmii_wait(efx);
 781         if (rc)
 782                 goto out;
 783
 784         EFX_POPULATE_OWORD_1(reg, FRF_AB_MD_PHY_ADR, addr);
 785         efx_writeo(efx, &reg, FR_AB_MD_PHY_ADR);
 786
 787         EFX_POPULATE_OWORD_2(reg, FRF_AB_MD_PRT_ADR, prtad,
 788                              FRF_AB_MD_DEV_ADR, devad);
 789         efx_writeo(efx, &reg, FR_AB_MD_ID);
 790
 791         /* Request data to be read */
 792         EFX_POPULATE_OWORD_2(reg, FRF_AB_MD_RDC, 1, FRF_AB_MD_GC, 0);
 793         efx_writeo(efx, &reg, FR_AB_MD_CS);
 794
 795         /* Wait for data to become available */
 796         rc = falcon_gmii_wait(efx);
 797         if (rc == 0) {
 798                 efx_reado(efx, &reg, FR_AB_MD_RXD);
 799                 rc = EFX_OWORD_FIELD(reg, FRF_AB_MD_RXD);
 800                 netif_vdbg(efx, hw, efx->net_dev,
 801                            "read from MDIO %d register %d.%d, got %04x\n",
 802                            prtad, devad, addr, rc);
 803         } else {
 804                 /* Abort the read operation */
 805                 EFX_POPULATE_OWORD_2(reg,
 806                                      FRF_AB_MD_RIC, 0,
 807                                      FRF_AB_MD_GC, 1);
 808                 efx_writeo(efx, &reg, FR_AB_MD_CS);
 809
 810                 netif_dbg(efx, hw, efx->net_dev,
 811                           "read from MDIO %d register %d.%d, got error %d\n",
 812                           prtad, devad, addr, rc);
 813         }
 814
 815 out:
 816         mutex_unlock(&efx->mdio_lock);
 817         return rc;
 818 }
 819
 820 /* This call is responsible for hooking in the MAC and PHY operations */
 821 static int falcon_probe_port(struct efx_nic *efx)
 822 {
 823         struct falcon_nic_data *nic_data = efx->nic_data;
 824         int rc;
 825
 826         switch (efx->phy_type) {
 827         case PHY_TYPE_SFX7101:
 828                 efx->phy_op = &falcon_sfx7101_phy_ops;
 829                 break;
 830         case PHY_TYPE_QT2022C2:
 831         case PHY_TYPE_QT2025C:
 832                 efx->phy_op = &falcon_qt202x_phy_ops;
 833                 break;
 834         default:
 835                 netif_err(efx, probe, efx->net_dev, "Unknown PHY type %d\n",
 836                           efx->phy_type);
 837                 return -ENODEV;
 838         }
 839
 840         /* Fill out MDIO structure and loopback modes */
 841         efx->mdio.mdio_read = falcon_mdio_read;
 842         efx->mdio.mdio_write = falcon_mdio_write;
 843         rc = efx->phy_op->probe(efx);
 844         if (rc != 0)
 845                 return rc;
 846
 847         /* Initial assumption */
 848         efx->link_state.speed = 10000;
 849         efx->link_state.fd = true;
 850
 851         /* Hardware flow ctrl. FalconA RX FIFO too small for pause generation */
 852         if (efx_nic_rev(efx) >= EFX_REV_FALCON_B0)
 853                 efx->wanted_fc = EFX_FC_RX | EFX_FC_TX;
 854         else
 855                 efx->wanted_fc = EFX_FC_RX;
 856         if (efx->mdio.mmds & MDIO_DEVS_AN)
 857                 efx->wanted_fc |= EFX_FC_AUTO;
 858
 859         /* Allocate buffer for stats */
 860         rc = efx_nic_alloc_buffer(efx, &efx->stats_buffer,
 861                                   FALCON_MAC_STATS_SIZE);
 862         if (rc)
 863                 return rc;
 864         netif_dbg(efx, probe, efx->net_dev,
 865                   "stats buffer at %llx (virt %p phys %llx)\n",
 866                   (u64)efx->stats_buffer.dma_addr,
 867                   efx->stats_buffer.addr,
 868                   (u64)virt_to_phys(efx->stats_buffer.addr));
 869         nic_data->stats_dma_done = efx->stats_buffer.addr + XgDmaDone_offset;
 870
 871         return 0;
 872 }
 873
 874 static void falcon_remove_port(struct efx_nic *efx)
 875 {
 876         efx->phy_op->remove(efx);
 877         efx_nic_free_buffer(efx, &efx->stats_buffer);
 878 }
 879
 880 /**************************************************************************
 881  *
 882  * Falcon test code
 883  *
 884  **************************************************************************/
 885
 886 static int
 887 falcon_read_nvram(struct efx_nic *efx, struct falcon_nvconfig *nvconfig_out)
 888 {
 889         struct falcon_nvconfig *nvconfig;
 890         struct efx_spi_device *spi;
 891         void *region;
 892         int rc, magic_num, struct_ver;
 893         __le16 *word, *limit;
 894         u32 csum;
 895
 896         spi = efx->spi_flash ? efx->spi_flash : efx->spi_eeprom;
 897         if (!spi)
 898                 return -EINVAL;
 899
 900         region = kmalloc(FALCON_NVCONFIG_END, GFP_KERNEL);
 901         if (!region)
 902                 return -ENOMEM;
 903         nvconfig = region + FALCON_NVCONFIG_OFFSET;
 904
 905         mutex_lock(&efx->spi_lock);
 906         rc = falcon_spi_read(efx, spi, 0, FALCON_NVCONFIG_END, NULL, region);
 907         mutex_unlock(&efx->spi_lock);
 908         if (rc) {
 909                 netif_err(efx, hw, efx->net_dev, "Failed to read %s\n",
 910                           efx->spi_flash ? "flash" : "EEPROM");
 911                 rc = -EIO;
 912                 goto out;
 913         }
 914
 915         magic_num = le16_to_cpu(nvconfig->board_magic_num);
 916         struct_ver = le16_to_cpu(nvconfig->board_struct_ver);
 917
 918         rc = -EINVAL;
 919         if (magic_num != FALCON_NVCONFIG_BOARD_MAGIC_NUM) {
 920                 netif_err(efx, hw, efx->net_dev,
 921                           "NVRAM bad magic 0x%x\n", magic_num);
 922                 goto out;
 923         }
 924         if (struct_ver < 2) {
 925                 netif_err(efx, hw, efx->net_dev,
 926                           "NVRAM has ancient version 0x%x\n", struct_ver);
 927                 goto out;
 928         } else if (struct_ver < 4) {
 929                 word = &nvconfig->board_magic_num;
 930                 limit = (__le16 *) (nvconfig + 1);
 931         } else {
 932                 word = region;
 933                 limit = region + FALCON_NVCONFIG_END;
 934         }
 935         for (csum = 0; word < limit; ++word)
 936                 csum += le16_to_cpu(*word);
 937
 938         if (~csum & 0xffff) {
 939                 netif_err(efx, hw, efx->net_dev,
 940                           "NVRAM has incorrect checksum\n");
 941                 goto out;
 942         }
 943
 944         rc = 0;
 945         if (nvconfig_out)
 946                 memcpy(nvconfig_out, nvconfig, sizeof(*nvconfig));
 947
 948  out:
 949         kfree(region);
 950         return rc;
 951 }
 952
 953 static int falcon_test_nvram(struct efx_nic *efx)
 954 {
 955         return falcon_read_nvram(efx, NULL);
 956 }
 957
 958 static const struct efx_nic_register_test falcon_b0_register_tests[] = {
 959         { FR_AZ_ADR_REGION,
 960           EFX_OWORD32(0x0003FFFF, 0x0003FFFF, 0x0003FFFF, 0x0003FFFF) },
 961         { FR_AZ_RX_CFG,
 962           EFX_OWORD32(0xFFFFFFFE, 0x00017FFF, 0x00000000, 0x00000000) },
 963         { FR_AZ_TX_CFG,
 964           EFX_OWORD32(0x7FFF0037, 0x00000000, 0x00000000, 0x00000000) },
 965         { FR_AZ_TX_RESERVED,
 966           EFX_OWORD32(0xFFFEFE80, 0x1FFFFFFF, 0x020000FE, 0x007FFFFF) },
 967         { FR_AB_MAC_CTRL,
 968           EFX_OWORD32(0xFFFF0000, 0x00000000, 0x00000000, 0x00000000) },
 969         { FR_AZ_SRM_TX_DC_CFG,
 970           EFX_OWORD32(0x001FFFFF, 0x00000000, 0x00000000, 0x00000000) },
 971         { FR_AZ_RX_DC_CFG,
 972           EFX_OWORD32(0x0000000F, 0x00000000, 0x00000000, 0x00000000) },
 973         { FR_AZ_RX_DC_PF_WM,
 974           EFX_OWORD32(0x000003FF, 0x00000000, 0x00000000, 0x00000000) },
 975         { FR_BZ_DP_CTRL,
 976           EFX_OWORD32(0x00000FFF, 0x00000000, 0x00000000, 0x00000000) },
 977         { FR_AB_GM_CFG2,
 978           EFX_OWORD32(0x00007337, 0x00000000, 0x00000000, 0x00000000) },
 979         { FR_AB_GMF_CFG0,
 980           EFX_OWORD32(0x00001F1F, 0x00000000, 0x00000000, 0x00000000) },
 981         { FR_AB_XM_GLB_CFG,
 982           EFX_OWORD32(0x00000C68, 0x00000000, 0x00000000, 0x00000000) },
 983         { FR_AB_XM_TX_CFG,
 984           EFX_OWORD32(0x00080164, 0x00000000, 0x00000000, 0x00000000) },
 985         { FR_AB_XM_RX_CFG,
 986           EFX_OWORD32(0x07100A0C, 0x00000000, 0x00000000, 0x00000000) },
 987         { FR_AB_XM_RX_PARAM,
 988           EFX_OWORD32(0x00001FF8, 0x00000000, 0x00000000, 0x00000000) },
 989         { FR_AB_XM_FC,
 990           EFX_OWORD32(0xFFFF0001, 0x00000000, 0x00000000, 0x00000000) },
 991         { FR_AB_XM_ADR_LO,
 992           EFX_OWORD32(0xFFFFFFFF, 0x00000000, 0x00000000, 0x00000000) },
 993         { FR_AB_XX_SD_CTL,
 994           EFX_OWORD32(0x0003FF0F, 0x00000000, 0x00000000, 0x00000000) },
 995 };
 996
 997 static int falcon_b0_test_registers(struct efx_nic *efx)
 998 {
 999         return efx_nic_test_registers(efx, falcon_b0_register_tests,
1000                                       ARRAY_SIZE(falcon_b0_register_tests));
1001 }
1002
1003 /**************************************************************************
1004  *
1005  * Device reset
1006  *
1007  **************************************************************************
1008  */
1009
1010 /* Resets NIC to known state.  This routine must be called in process
1011  * context and is allowed to sleep. */
1012 static int falcon_reset_hw(struct efx_nic *efx, enum reset_type method)
1013 {
1014         struct falcon_nic_data *nic_data = efx->nic_data;
1015         efx_oword_t glb_ctl_reg_ker;
1016         int rc;
1017
1018         netif_dbg(efx, hw, efx->net_dev, "performing %s hardware reset\n",
1019                   RESET_TYPE(method));
1020
1021         /* Initiate device reset */
1022         if (method == RESET_TYPE_WORLD) {
1023                 rc = pci_save_state(efx->pci_dev);
1024                 if (rc) {
1025                         netif_err(efx, drv, efx->net_dev,
1026                                   "failed to backup PCI state of primary "
1027                                   "function prior to hardware reset\n");
1028                         goto fail1;
1029                 }
1030                 if (efx_nic_is_dual_func(efx)) {
1031                         rc = pci_save_state(nic_data->pci_dev2);
1032                         if (rc) {
1033                                 netif_err(efx, drv, efx->net_dev,
1034                                           "failed to backup PCI state of "
1035                                           "secondary function prior to "
1036                                           "hardware reset\n");
1037                                 goto fail2;
1038                         }
1039                 }
1040
1041                 EFX_POPULATE_OWORD_2(glb_ctl_reg_ker,
1042                                      FRF_AB_EXT_PHY_RST_DUR,
1043                                      FFE_AB_EXT_PHY_RST_DUR_10240US,
1044                                      FRF_AB_SWRST, 1);
1045         } else {
1046                 EFX_POPULATE_OWORD_7(glb_ctl_reg_ker,
1047                                      /* exclude PHY from "invisible" reset */
1048                                      FRF_AB_EXT_PHY_RST_CTL,
1049                                      method == RESET_TYPE_INVISIBLE,
1050                                      /* exclude EEPROM/flash and PCIe */
1051                                      FRF_AB_PCIE_CORE_RST_CTL, 1,
1052                                      FRF_AB_PCIE_NSTKY_RST_CTL, 1,
1053                                      FRF_AB_PCIE_SD_RST_CTL, 1,
1054                                      FRF_AB_EE_RST_CTL, 1,
1055                                      FRF_AB_EXT_PHY_RST_DUR,
1056                                      FFE_AB_EXT_PHY_RST_DUR_10240US,
1057                                      FRF_AB_SWRST, 1);
1058         }
1059         efx_writeo(efx, &glb_ctl_reg_ker, FR_AB_GLB_CTL);
1060
1061         netif_dbg(efx, hw, efx->net_dev, "waiting for hardware reset\n");
1062         schedule_timeout_uninterruptible(HZ / 20);
1063
1064         /* Restore PCI configuration if needed */
1065         if (method == RESET_TYPE_WORLD) {
1066                 if (efx_nic_is_dual_func(efx)) {
1067                         rc = pci_restore_state(nic_data->pci_dev2);
1068                         if (rc) {
1069                                 netif_err(efx, drv, efx->net_dev,
1070                                           "failed to restore PCI config for "
1071                                           "the secondary function\n");
1072                                 goto fail3;
1073                         }
1074                 }
1075                 rc = pci_restore_state(efx->pci_dev);
1076                 if (rc) {
1077                         netif_err(efx, drv, efx->net_dev,
1078                                   "failed to restore PCI config for the "
1079                                   "primary function\n");
1080                         goto fail4;
1081                 }
1082                 netif_dbg(efx, drv, efx->net_dev,
1083                           "successfully restored PCI config\n");
1084         }
1085
1086         /* Assert that reset complete */
1087         efx_reado(efx, &glb_ctl_reg_ker, FR_AB_GLB_CTL);
1088         if (EFX_OWORD_FIELD(glb_ctl_reg_ker, FRF_AB_SWRST) != 0) {
1089                 rc = -ETIMEDOUT;
1090                 netif_err(efx, hw, efx->net_dev,
1091                           "timed out waiting for hardware reset\n");
1092                 goto fail5;
1093         }
1094         netif_dbg(efx, hw, efx->net_dev, "hardware reset complete\n");
1095
1096         return 0;
1097
1098         /* pci_save_state() and pci_restore_state() MUST be called in pairs */
1099 fail2:
1100 fail3:
1101         pci_restore_state(efx->pci_dev);
1102 fail1:
1103 fail4:
1104 fail5:
1105         return rc;
1106 }
1107
1108 static void falcon_monitor(struct efx_nic *efx)
1109 {
1110         bool link_changed;
1111         int rc;
1112
1113         BUG_ON(!mutex_is_locked(&efx->mac_lock));
1114
1115         rc = falcon_board(efx)->type->monitor(efx);
1116         if (rc) {
1117                 netif_err(efx, hw, efx->net_dev,
1118                           "Board sensor %s; shutting down PHY\n",
1119                           (rc == -ERANGE) ? "reported fault" : "failed");
1120                 efx->phy_mode |= PHY_MODE_LOW_POWER;
1121                 rc = __efx_reconfigure_port(efx);
1122                 WARN_ON(rc);
1123         }
1124
1125         if (LOOPBACK_INTERNAL(efx))
1126                 link_changed = falcon_loopback_link_poll(efx);
1127         else
1128                 link_changed = efx->phy_op->poll(efx);
1129
1130         if (link_changed) {
1131                 falcon_stop_nic_stats(efx);
1132                 falcon_deconfigure_mac_wrapper(efx);
1133
1134                 falcon_reset_macs(efx);
1135                 rc = efx->mac_op->reconfigure(efx);
1136                 BUG_ON(rc);
1137
1138                 falcon_start_nic_stats(efx);
1139
1140                 efx_link_status_changed(efx);
1141         }
1142
1143         falcon_poll_xmac(efx);
1144 }
1145
1146 /* Zeroes out the SRAM contents.  This routine must be called in
1147  * process context and is allowed to sleep.
1148  */
1149 static int falcon_reset_sram(struct efx_nic *efx)
1150 {
1151         efx_oword_t srm_cfg_reg_ker, gpio_cfg_reg_ker;
1152         int count;
1153
1154         /* Set the SRAM wake/sleep GPIO appropriately. */
1155         efx_reado(efx, &gpio_cfg_reg_ker, FR_AB_GPIO_CTL);
1156         EFX_SET_OWORD_FIELD(gpio_cfg_reg_ker, FRF_AB_GPIO1_OEN, 1);
1157         EFX_SET_OWORD_FIELD(gpio_cfg_reg_ker, FRF_AB_GPIO1_OUT, 1);
1158         efx_writeo(efx, &gpio_cfg_reg_ker, FR_AB_GPIO_CTL);
1159
1160         /* Initiate SRAM reset */
1161         EFX_POPULATE_OWORD_2(srm_cfg_reg_ker,
1162                              FRF_AZ_SRM_INIT_EN, 1,
1163                              FRF_AZ_SRM_NB_SZ, 0);
1164         efx_writeo(efx, &srm_cfg_reg_ker, FR_AZ_SRM_CFG);
1165
1166         /* Wait for SRAM reset to complete */
1167         count = 0;
1168         do {
1169                 netif_dbg(efx, hw, efx->net_dev,
1170                           "waiting for SRAM reset (attempt %d)...\n", count);
1171
1172                 /* SRAM reset is slow; expect around 16ms */
1173                 schedule_timeout_uninterruptible(HZ / 50);
1174
1175                 /* Check for reset complete */
1176                 efx_reado(efx, &srm_cfg_reg_ker, FR_AZ_SRM_CFG);
1177                 if (!EFX_OWORD_FIELD(srm_cfg_reg_ker, FRF_AZ_SRM_INIT_EN)) {
1178                         netif_dbg(efx, hw, efx->net_dev,
1179                                   "SRAM reset complete\n");
1180
1181                         return 0;
1182                 }
1183         } while (++count < 20); /* wait upto 0.4 sec */
1184
1185         netif_err(efx, hw, efx->net_dev, "timed out waiting for SRAM reset\n");
1186         return -ETIMEDOUT;
1187 }
1188
1189 static int falcon_spi_device_init(struct efx_nic *efx,
1190                                   struct efx_spi_device **spi_device_ret,
1191                                   unsigned int device_id, u32 device_type)
1192 {
1193         struct efx_spi_device *spi_device;
1194
1195         if (device_type != 0) {
1196                 spi_device = kzalloc(sizeof(*spi_device), GFP_KERNEL);
1197                 if (!spi_device)
1198                         return -ENOMEM;
1199                 spi_device->device_id = device_id;
1200                 spi_device->size =
1201                         1 << SPI_DEV_TYPE_FIELD(device_type, SPI_DEV_TYPE_SIZE);
1202                 spi_device->addr_len =
1203                         SPI_DEV_TYPE_FIELD(device_type, SPI_DEV_TYPE_ADDR_LEN);
1204                 spi_device->munge_address = (spi_device->size == 1 << 9 &&
1205                                              spi_device->addr_len == 1);
1206                 spi_device->erase_command =
1207                         SPI_DEV_TYPE_FIELD(device_type, SPI_DEV_TYPE_ERASE_CMD);
1208                 spi_device->erase_size =
1209                         1 << SPI_DEV_TYPE_FIELD(device_type,
1210                                                 SPI_DEV_TYPE_ERASE_SIZE);
1211                 spi_device->block_size =
1212                         1 << SPI_DEV_TYPE_FIELD(device_type,
1213                                                 SPI_DEV_TYPE_BLOCK_SIZE);
1214         } else {
1215                 spi_device = NULL;
1216         }
1217
1218         kfree(*spi_device_ret);
1219         *spi_device_ret = spi_device;
1220         return 0;
1221 }
1222
1223 static void falcon_remove_spi_devices(struct efx_nic *efx)
1224 {
1225         kfree(efx->spi_eeprom);
1226         efx->spi_eeprom = NULL;
1227         kfree(efx->spi_flash);
1228         efx->spi_flash = NULL;
1229 }
1230
1231 /* Extract non-volatile configuration */
1232 static int falcon_probe_nvconfig(struct efx_nic *efx)
1233 {
1234         struct falcon_nvconfig *nvconfig;
1235         int board_rev;
1236         int rc;
1237
1238         nvconfig = kmalloc(sizeof(*nvconfig), GFP_KERNEL);
1239         if (!nvconfig)
1240                 return -ENOMEM;
1241
1242         rc = falcon_read_nvram(efx, nvconfig);
1243         if (rc == -EINVAL) {
1244                 netif_err(efx, probe, efx->net_dev,
1245                           "NVRAM is invalid therefore using defaults\n");
1246                 efx->phy_type = PHY_TYPE_NONE;
1247                 efx->mdio.prtad = MDIO_PRTAD_NONE;
1248                 board_rev = 0;
1249                 rc = 0;
1250         } else if (rc) {
1251                 goto fail1;
1252         } else {
1253                 struct falcon_nvconfig_board_v2 *v2 = &nvconfig->board_v2;
1254                 struct falcon_nvconfig_board_v3 *v3 = &nvconfig->board_v3;
1255
1256                 efx->phy_type = v2->port0_phy_type;
1257                 efx->mdio.prtad = v2->port0_phy_addr;
1258                 board_rev = le16_to_cpu(v2->board_revision);
1259
1260                 if (le16_to_cpu(nvconfig->board_struct_ver) >= 3) {
1261                         rc = falcon_spi_device_init(
1262                                 efx, &efx->spi_flash, FFE_AB_SPI_DEVICE_FLASH,
1263                                 le32_to_cpu(v3->spi_device_type
1264                                             [FFE_AB_SPI_DEVICE_FLASH]));
1265                         if (rc)
1266                                 goto fail2;
1267                         rc = falcon_spi_device_init(
1268                                 efx, &efx->spi_eeprom, FFE_AB_SPI_DEVICE_EEPROM,
1269                                 le32_to_cpu(v3->spi_device_type
1270                                             [FFE_AB_SPI_DEVICE_EEPROM]));
1271                         if (rc)
1272                                 goto fail2;
1273                 }
1274         }
1275
1276         /* Read the MAC addresses */
1277         memcpy(efx->mac_address, nvconfig->mac_address[0], ETH_ALEN);
1278
1279         netif_dbg(efx, probe, efx->net_dev, "PHY is %d phy_id %d\n",
1280                   efx->phy_type, efx->mdio.prtad);
1281
1282         rc = falcon_probe_board(efx, board_rev);
1283         if (rc)
1284                 goto fail2;
1285
1286         kfree(nvconfig);
1287         return 0;
1288
1289  fail2:
1290         falcon_remove_spi_devices(efx);
1291  fail1:
1292         kfree(nvconfig);
1293         return rc;
1294 }
1295
1296 /* Probe all SPI devices on the NIC */
1297 static void falcon_probe_spi_devices(struct efx_nic *efx)
1298 {
1299         efx_oword_t nic_stat, gpio_ctl, ee_vpd_cfg;
1300         int boot_dev;
1301
1302         efx_reado(efx, &gpio_ctl, FR_AB_GPIO_CTL);
1303         efx_reado(efx, &nic_stat, FR_AB_NIC_STAT);
1304         efx_reado(efx, &ee_vpd_cfg, FR_AB_EE_VPD_CFG0);
1305
1306         if (EFX_OWORD_FIELD(gpio_ctl, FRF_AB_GPIO3_PWRUP_VALUE)) {
1307                 boot_dev = (EFX_OWORD_FIELD(nic_stat, FRF_AB_SF_PRST) ?
1308                             FFE_AB_SPI_DEVICE_FLASH : FFE_AB_SPI_DEVICE_EEPROM);
1309                 netif_dbg(efx, probe, efx->net_dev, "Booted from %s\n",
1310                           boot_dev == FFE_AB_SPI_DEVICE_FLASH ?
1311                           "flash" : "EEPROM");
1312         } else {
1313                 /* Disable VPD and set clock dividers to safe
1314                  * values for initial programming. */
1315                 boot_dev = -1;
1316                 netif_dbg(efx, probe, efx->net_dev,
1317                           "Booted from internal ASIC settings;"
1318                           " setting SPI config\n");
1319                 EFX_POPULATE_OWORD_3(ee_vpd_cfg, FRF_AB_EE_VPD_EN, 0,
1320                                      /* 125 MHz / 7 ~= 20 MHz */
1321                                      FRF_AB_EE_SF_CLOCK_DIV, 7,
1322                                      /* 125 MHz / 63 ~= 2 MHz */
1323                                      FRF_AB_EE_EE_CLOCK_DIV, 63);
1324                 efx_writeo(efx, &ee_vpd_cfg, FR_AB_EE_VPD_CFG0);
1325         }
1326
1327         if (boot_dev == FFE_AB_SPI_DEVICE_FLASH)
1328                 falcon_spi_device_init(efx, &efx->spi_flash,
1329                                        FFE_AB_SPI_DEVICE_FLASH,
1330                                        default_flash_type);
1331         if (boot_dev == FFE_AB_SPI_DEVICE_EEPROM)
1332                 falcon_spi_device_init(efx, &efx->spi_eeprom,
1333                                        FFE_AB_SPI_DEVICE_EEPROM,
1334                                        large_eeprom_type);
1335 }
1336
1337 static int falcon_probe_nic(struct efx_nic *efx)
1338 {
1339         struct falcon_nic_data *nic_data;
1340         struct falcon_board *board;
1341         int rc;
1342
1343         /* Allocate storage for hardware specific data */
1344         nic_data = kzalloc(sizeof(*nic_data), GFP_KERNEL);
1345         if (!nic_data)
1346                 return -ENOMEM;
1347         efx->nic_data = nic_data;
1348
1349         rc = -ENODEV;
1350
1351         if (efx_nic_fpga_ver(efx) != 0) {
1352                 netif_err(efx, probe, efx->net_dev,
1353                           "Falcon FPGA not supported\n");
1354                 goto fail1;
1355         }
1356
1357         if (efx_nic_rev(efx) <= EFX_REV_FALCON_A1) {
1358                 efx_oword_t nic_stat;
1359                 struct pci_dev *dev;
1360                 u8 pci_rev = efx->pci_dev->revision;
1361
1362                 if ((pci_rev == 0xff) || (pci_rev == 0)) {
1363                         netif_err(efx, probe, efx->net_dev,
1364                                   "Falcon rev A0 not supported\n");
1365                         goto fail1;
1366                 }
1367                 efx_reado(efx, &nic_stat, FR_AB_NIC_STAT);
1368                 if (EFX_OWORD_FIELD(nic_stat, FRF_AB_STRAP_10G) == 0) {
1369                         netif_err(efx, probe, efx->net_dev,
1370                                   "Falcon rev A1 1G not supported\n");
1371                         goto fail1;
1372                 }
1373                 if (EFX_OWORD_FIELD(nic_stat, FRF_AA_STRAP_PCIE) == 0) {
1374                         netif_err(efx, probe, efx->net_dev,
1375                                   "Falcon rev A1 PCI-X not supported\n");
1376                         goto fail1;
1377                 }
1378
1379                 dev = pci_dev_get(efx->pci_dev);
1380                 while ((dev = pci_get_device(EFX_VENDID_SFC, FALCON_A_S_DEVID,
1381                                              dev))) {
1382                         if (dev->bus == efx->pci_dev->bus &&
1383                             dev->devfn == efx->pci_dev->devfn + 1) {
1384                                 nic_data->pci_dev2 = dev;
1385                                 break;
1386                         }
1387                 }
1388                 if (!nic_data->pci_dev2) {
1389                         netif_err(efx, probe, efx->net_dev,
1390                                   "failed to find secondary function\n");
1391                         rc = -ENODEV;
1392                         goto fail2;
1393                 }
1394         }
1395
1396         /* Now we can reset the NIC */
1397         rc = falcon_reset_hw(efx, RESET_TYPE_ALL);
1398         if (rc) {
1399                 netif_err(efx, probe, efx->net_dev, "failed to reset NIC\n");
1400                 goto fail3;
1401         }
1402
1403         /* Allocate memory for INT_KER */
1404         rc = efx_nic_alloc_buffer(efx, &efx->irq_status, sizeof(efx_oword_t));
1405         if (rc)
1406                 goto fail4;
1407         BUG_ON(efx->irq_status.dma_addr & 0x0f);
1408
1409         netif_dbg(efx, probe, efx->net_dev,
1410                   "INT_KER at %llx (virt %p phys %llx)\n",
1411                   (u64)efx->irq_status.dma_addr,
1412                   efx->irq_status.addr,
1413                   (u64)virt_to_phys(efx->irq_status.addr));
1414
1415         falcon_probe_spi_devices(efx);
1416
1417         /* Read in the non-volatile configuration */
1418         rc = falcon_probe_nvconfig(efx);
1419         if (rc)
1420                 goto fail5;
1421
1422         /* Initialise I2C adapter */
1423         board = falcon_board(efx);
1424         board->i2c_adap.owner = THIS_MODULE;
1425         board->i2c_data = falcon_i2c_bit_operations;
1426         board->i2c_data.data = efx;
1427         board->i2c_adap.algo_data = &board->i2c_data;
1428         board->i2c_adap.dev.parent = &efx->pci_dev->dev;
1429         strlcpy(board->i2c_adap.name, "SFC4000 GPIO",
1430                 sizeof(board->i2c_adap.name));
1431         rc = i2c_bit_add_bus(&board->i2c_adap);
1432         if (rc)
1433                 goto fail5;
1434
1435         rc = falcon_board(efx)->type->init(efx);
1436         if (rc) {
1437                 netif_err(efx, probe, efx->net_dev,
1438                           "failed to initialise board\n");
1439                 goto fail6;
1440         }
1441
1442         nic_data->stats_disable_count = 1;
1443         setup_timer(&nic_data->stats_timer, &falcon_stats_timer_func,
1444                     (unsigned long)efx);
1445
1446         return 0;
1447
1448  fail6:
1449         BUG_ON(i2c_del_adapter(&board->i2c_adap));
1450         memset(&board->i2c_adap, 0, sizeof(board->i2c_adap));
1451  fail5:
1452         falcon_remove_spi_devices(efx);
1453         efx_nic_free_buffer(efx, &efx->irq_status);
1454  fail4:
1455  fail3:
1456         if (nic_data->pci_dev2) {
1457                 pci_dev_put(nic_data->pci_dev2);
1458                 nic_data->pci_dev2 = NULL;
1459         }
1460  fail2:
1461  fail1:
1462         kfree(efx->nic_data);
1463         return rc;
1464 }
1465
1466 static void falcon_init_rx_cfg(struct efx_nic *efx)
1467 {
1468         /* Prior to Siena the RX DMA engine will split each frame at
1469          * intervals of RX_USR_BUF_SIZE (32-byte units). We set it to
1470          * be so large that that never happens. */
1471         const unsigned huge_buf_size = (3 * 4096) >> 5;
1472         /* RX control FIFO thresholds (32 entries) */
1473         const unsigned ctrl_xon_thr = 20;
1474         const unsigned ctrl_xoff_thr = 25;
1475         /* RX data FIFO thresholds (256-byte units; size varies) */
1476         int data_xon_thr = efx_nic_rx_xon_thresh >> 8;
1477         int data_xoff_thr = efx_nic_rx_xoff_thresh >> 8;
1478         efx_oword_t reg;
1479
1480         efx_reado(efx, &reg, FR_AZ_RX_CFG);
1481         if (efx_nic_rev(efx) <= EFX_REV_FALCON_A1) {
1482                 /* Data FIFO size is 5.5K */
1483                 if (data_xon_thr < 0)
1484                         data_xon_thr = 512 >> 8;
1485                 if (data_xoff_thr < 0)
1486                         data_xoff_thr = 2048 >> 8;
1487                 EFX_SET_OWORD_FIELD(reg, FRF_AA_RX_DESC_PUSH_EN, 0);
1488                 EFX_SET_OWORD_FIELD(reg, FRF_AA_RX_USR_BUF_SIZE,
1489                                     huge_buf_size);
1490                 EFX_SET_OWORD_FIELD(reg, FRF_AA_RX_XON_MAC_TH, data_xon_thr);
1491                 EFX_SET_OWORD_FIELD(reg, FRF_AA_RX_XOFF_MAC_TH, data_xoff_thr);
1492                 EFX_SET_OWORD_FIELD(reg, FRF_AA_RX_XON_TX_TH, ctrl_xon_thr);
1493                 EFX_SET_OWORD_FIELD(reg, FRF_AA_RX_XOFF_TX_TH, ctrl_xoff_thr);
1494         } else {
1495                 /* Data FIFO size is 80K; register fields moved */
1496                 if (data_xon_thr < 0)
1497                         data_xon_thr = 27648 >> 8; /* ~3*max MTU */
1498                 if (data_xoff_thr < 0)
1499                         data_xoff_thr = 54272 >> 8; /* ~80Kb - 3*max MTU */
1500                 EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_DESC_PUSH_EN, 0);
1501                 EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_USR_BUF_SIZE,
1502                                     huge_buf_size);
1503                 EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_XON_MAC_TH, data_xon_thr);
1504                 EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_XOFF_MAC_TH, data_xoff_thr);
1505                 EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_XON_TX_TH, ctrl_xon_thr);
1506                 EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_XOFF_TX_TH, ctrl_xoff_thr);
1507                 EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_INGR_EN, 1);
1508
1509                 /* Enable hash insertion. This is broken for the
1510                  * 'Falcon' hash so also select Toeplitz TCP/IPv4 and
1511                  * IPv4 hashes. */
1512                 EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_HASH_INSRT_HDR, 1);
1513                 EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_HASH_ALG, 1);
1514                 EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_IP_HASH, 1);
1515         }
1516         /* Always enable XOFF signal from RX FIFO.  We enable
1517          * or disable transmission of pause frames at the MAC. */
1518         EFX_SET_OWORD_FIELD(reg, FRF_AZ_RX_XOFF_MAC_EN, 1);
1519         efx_writeo(efx, &reg, FR_AZ_RX_CFG);
1520 }
1521
1522 /* This call performs hardware-specific global initialisation, such as
1523  * defining the descriptor cache sizes and number of RSS channels.
1524  * It does not set up any buffers, descriptor rings or event queues.
1525  */
1526 static int falcon_init_nic(struct efx_nic *efx)
1527 {
1528         efx_oword_t temp;
1529         int rc;
1530
1531         /* Use on-chip SRAM */
1532         efx_reado(efx, &temp, FR_AB_NIC_STAT);
1533         EFX_SET_OWORD_FIELD(temp, FRF_AB_ONCHIP_SRAM, 1);
1534         efx_writeo(efx, &temp, FR_AB_NIC_STAT);
1535
1536         rc = falcon_reset_sram(efx);
1537         if (rc)
1538                 return rc;
1539
1540         /* Clear the parity enables on the TX data fifos as
1541          * they produce false parity errors because of timing issues
1542          */
1543         if (EFX_WORKAROUND_5129(efx)) {
1544                 efx_reado(efx, &temp, FR_AZ_CSR_SPARE);
1545                 EFX_SET_OWORD_FIELD(temp, FRF_AB_MEM_PERR_EN_TX_DATA, 0);
1546                 efx_writeo(efx, &temp, FR_AZ_CSR_SPARE);
1547         }
1548
1549         if (EFX_WORKAROUND_7244(efx)) {
1550                 efx_reado(efx, &temp, FR_BZ_RX_FILTER_CTL);
1551                 EFX_SET_OWORD_FIELD(temp, FRF_BZ_UDP_FULL_SRCH_LIMIT, 8);
1552                 EFX_SET_OWORD_FIELD(temp, FRF_BZ_UDP_WILD_SRCH_LIMIT, 8);
1553                 EFX_SET_OWORD_FIELD(temp, FRF_BZ_TCP_FULL_SRCH_LIMIT, 8);
1554                 EFX_SET_OWORD_FIELD(temp, FRF_BZ_TCP_WILD_SRCH_LIMIT, 8);
1555                 efx_writeo(efx, &temp, FR_BZ_RX_FILTER_CTL);
1556         }
1557
1558         /* XXX This is documented only for Falcon A0/A1 */
1559         /* Setup RX.  Wait for descriptor is broken and must
1560          * be disabled.  RXDP recovery shouldn't be needed, but is.
1561          */
1562         efx_reado(efx, &temp, FR_AA_RX_SELF_RST);
1563         EFX_SET_OWORD_FIELD(temp, FRF_AA_RX_NODESC_WAIT_DIS, 1);
1564         EFX_SET_OWORD_FIELD(temp, FRF_AA_RX_SELF_RST_EN, 1);
1565         if (EFX_WORKAROUND_5583(efx))
1566                 EFX_SET_OWORD_FIELD(temp, FRF_AA_RX_ISCSI_DIS, 1);
1567         efx_writeo(efx, &temp, FR_AA_RX_SELF_RST);
1568
1569         /* Do not enable TX_NO_EOP_DISC_EN, since it limits packets to 16
1570          * descriptors (which is bad).
1571          */
1572         efx_reado(efx, &temp, FR_AZ_TX_CFG);
1573         EFX_SET_OWORD_FIELD(temp, FRF_AZ_TX_NO_EOP_DISC_EN, 0);
1574         efx_writeo(efx, &temp, FR_AZ_TX_CFG);
1575
1576         falcon_init_rx_cfg(efx);
1577
1578         if (efx_nic_rev(efx) >= EFX_REV_FALCON_B0) {
1579                 /* Set hash key for IPv4 */
1580                 memcpy(&temp, efx->rx_hash_key, sizeof(temp));
1581                 efx_writeo(efx, &temp, FR_BZ_RX_RSS_TKEY);
1582
1583                 /* Set destination of both TX and RX Flush events */
1584                 EFX_POPULATE_OWORD_1(temp, FRF_BZ_FLS_EVQ_ID, 0);
1585                 efx_writeo(efx, &temp, FR_BZ_DP_CTRL);
1586         }
1587
1588         efx_nic_init_common(efx);
1589
1590         return 0;
1591 }
1592
1593 static void falcon_remove_nic(struct efx_nic *efx)
1594 {
1595         struct falcon_nic_data *nic_data = efx->nic_data;
1596         struct falcon_board *board = falcon_board(efx);
1597         int rc;
1598
1599         board->type->fini(efx);
1600
1601         /* Remove I2C adapter and clear it in preparation for a retry */
1602         rc = i2c_del_adapter(&board->i2c_adap);
1603         BUG_ON(rc);
1604         memset(&board->i2c_adap, 0, sizeof(board->i2c_adap));
1605
1606         falcon_remove_spi_devices(efx);
1607         efx_nic_free_buffer(efx, &efx->irq_status);
1608
1609         falcon_reset_hw(efx, RESET_TYPE_ALL);
1610
1611         /* Release the second function after the reset */
1612         if (nic_data->pci_dev2) {
1613                 pci_dev_put(nic_data->pci_dev2);
1614                 nic_data->pci_dev2 = NULL;
1615         }
1616
1617         /* Tear down the private nic state */
1618         kfree(efx->nic_data);
1619         efx->nic_data = NULL;
1620 }
1621
1622 static void falcon_update_nic_stats(struct efx_nic *efx)
1623 {
1624         struct falcon_nic_data *nic_data = efx->nic_data;
1625         efx_oword_t cnt;
1626
1627         if (nic_data->stats_disable_count)
1628                 return;
1629
1630         efx_reado(efx, &cnt, FR_AZ_RX_NODESC_DROP);
1631         efx->n_rx_nodesc_drop_cnt +=
1632                 EFX_OWORD_FIELD(cnt, FRF_AB_RX_NODESC_DROP_CNT);
1633
1634         if (nic_data->stats_pending &&
1635             *nic_data->stats_dma_done == FALCON_STATS_DONE) {
1636                 nic_data->stats_pending = false;
1637                 rmb(); /* read the done flag before the stats */
1638                 efx->mac_op->update_stats(efx);
1639         }
1640 }
1641
1642 void falcon_start_nic_stats(struct efx_nic *efx)
1643 {
1644         struct falcon_nic_data *nic_data = efx->nic_data;
1645
1646         spin_lock_bh(&efx->stats_lock);
1647         if (--nic_data->stats_disable_count == 0)
1648                 falcon_stats_request(efx);
1649         spin_unlock_bh(&efx->stats_lock);
1650 }
1651
1652 void falcon_stop_nic_stats(struct efx_nic *efx)
1653 {
1654         struct falcon_nic_data *nic_data = efx->nic_data;
1655         int i;
1656
1657         might_sleep();
1658
1659         spin_lock_bh(&efx->stats_lock);
1660         ++nic_data->stats_disable_count;
1661         spin_unlock_bh(&efx->stats_lock);
1662
1663         del_timer_sync(&nic_data->stats_timer);
1664
1665         /* Wait enough time for the most recent transfer to
1666          * complete. */
1667         for (i = 0; i < 4 && nic_data->stats_pending; i++) {
1668                 if (*nic_data->stats_dma_done == FALCON_STATS_DONE)
1669                         break;
1670                 msleep(1);
1671         }
1672
1673         spin_lock_bh(&efx->stats_lock);
1674         falcon_stats_complete(efx);
1675         spin_unlock_bh(&efx->stats_lock);
1676 }
1677
1678 static void falcon_set_id_led(struct efx_nic *efx, enum efx_led_mode mode)
1679 {
1680         falcon_board(efx)->type->set_id_led(efx, mode);
1681 }
1682
1683 /**************************************************************************
1684  *
1685  * Wake on LAN
1686  *
1687  **************************************************************************
1688  */
1689
1690 static void falcon_get_wol(struct efx_nic *efx, struct ethtool_wolinfo *wol)
1691 {
1692         wol->supported = 0;
1693         wol->wolopts = 0;
1694         memset(&wol->sopass, 0, sizeof(wol->sopass));
1695 }
1696
1697 static int falcon_set_wol(struct efx_nic *efx, u32 type)
1698 {
1699         if (type != 0)
1700                 return -EINVAL;
1701         return 0;
1702 }
1703
1704 /**************************************************************************
1705  *
1706  * Revision-dependent attributes used by efx.c and nic.c
1707  *
1708  **************************************************************************
1709  */
1710
1711 struct efx_nic_type falcon_a1_nic_type = {
1712         .probe = falcon_probe_nic,
1713         .remove = falcon_remove_nic,
1714         .init = falcon_init_nic,
1715         .fini = efx_port_dummy_op_void,
1716         .monitor = falcon_monitor,
1717         .reset = falcon_reset_hw,
1718         .probe_port = falcon_probe_port,
1719         .remove_port = falcon_remove_port,
1720         .prepare_flush = falcon_prepare_flush,
1721         .update_stats = falcon_update_nic_stats,
1722         .start_stats = falcon_start_nic_stats,
1723         .stop_stats = falcon_stop_nic_stats,
1724         .set_id_led = falcon_set_id_led,
1725         .push_irq_moderation = falcon_push_irq_moderation,
1726         .push_multicast_hash = falcon_push_multicast_hash,
1727         .reconfigure_port = falcon_reconfigure_port,
1728         .get_wol = falcon_get_wol,
1729         .set_wol = falcon_set_wol,
1730         .resume_wol = efx_port_dummy_op_void,
1731         .test_nvram = falcon_test_nvram,
1732         .default_mac_ops = &falcon_xmac_operations,
1733
1734         .revision = EFX_REV_FALCON_A1,
1735         .mem_map_size = 0x20000,
1736         .txd_ptr_tbl_base = FR_AA_TX_DESC_PTR_TBL_KER,
1737         .rxd_ptr_tbl_base = FR_AA_RX_DESC_PTR_TBL_KER,
1738         .buf_tbl_base = FR_AA_BUF_FULL_TBL_KER,
1739         .evq_ptr_tbl_base = FR_AA_EVQ_PTR_TBL_KER,
1740         .evq_rptr_tbl_base = FR_AA_EVQ_RPTR_KER,
1741         .max_dma_mask = DMA_BIT_MASK(FSF_AZ_TX_KER_BUF_ADDR_WIDTH),
1742         .rx_buffer_padding = 0x24,
1743         .max_interrupt_mode = EFX_INT_MODE_MSI,
1744         .phys_addr_channels = 4,
1745         .tx_dc_base = 0x130000,
1746         .rx_dc_base = 0x100000,
1747         .offload_features = NETIF_F_IP_CSUM,
1748         .reset_world_flags = ETH_RESET_IRQ,
1749 };
1750
1751 struct efx_nic_type falcon_b0_nic_type = {
1752         .probe = falcon_probe_nic,
1753         .remove = falcon_remove_nic,
1754         .init = falcon_init_nic,
1755         .fini = efx_port_dummy_op_void,
1756         .monitor = falcon_monitor,
1757         .reset = falcon_reset_hw,
1758         .probe_port = falcon_probe_port,
1759         .remove_port = falcon_remove_port,
1760         .prepare_flush = falcon_prepare_flush,
1761         .update_stats = falcon_update_nic_stats,
1762         .start_stats = falcon_start_nic_stats,
1763         .stop_stats = falcon_stop_nic_stats,
1764         .set_id_led = falcon_set_id_led,
1765         .push_irq_moderation = falcon_push_irq_moderation,
1766         .push_multicast_hash = falcon_push_multicast_hash,
1767         .reconfigure_port = falcon_reconfigure_port,
1768         .get_wol = falcon_get_wol,
1769         .set_wol = falcon_set_wol,
1770         .resume_wol = efx_port_dummy_op_void,
1771         .test_registers = falcon_b0_test_registers,
1772         .test_nvram = falcon_test_nvram,
1773         .default_mac_ops = &falcon_xmac_operations,
1774
1775         .revision = EFX_REV_FALCON_B0,
1776         /* Map everything up to and including the RSS indirection
1777          * table.  Don't map MSI-X table, MSI-X PBA since Linux
1778          * requires that they not be mapped.  */
1779         .mem_map_size = (FR_BZ_RX_INDIRECTION_TBL +
1780                          FR_BZ_RX_INDIRECTION_TBL_STEP *
1781                          FR_BZ_RX_INDIRECTION_TBL_ROWS),
1782         .txd_ptr_tbl_base = FR_BZ_TX_DESC_PTR_TBL,
1783         .rxd_ptr_tbl_base = FR_BZ_RX_DESC_PTR_TBL,
1784         .buf_tbl_base = FR_BZ_BUF_FULL_TBL,
1785         .evq_ptr_tbl_base = FR_BZ_EVQ_PTR_TBL,
1786         .evq_rptr_tbl_base = FR_BZ_EVQ_RPTR,
1787         .max_dma_mask = DMA_BIT_MASK(FSF_AZ_TX_KER_BUF_ADDR_WIDTH),
1788         .rx_buffer_hash_size = 0x10,
1789         .rx_buffer_padding = 0,
1790         .max_interrupt_mode = EFX_INT_MODE_MSIX,
1791         .phys_addr_channels = 32, /* Hardware limit is 64, but the legacy
1792                                    * interrupt handler only supports 32
1793                                    * channels */
1794         .tx_dc_base = 0x130000,
1795         .rx_dc_base = 0x100000,
1796         .offload_features = NETIF_F_IP_CSUM | NETIF_F_RXHASH | NETIF_F_NTUPLE,
1797         .reset_world_flags = ETH_RESET_IRQ,
1798 };
1799