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 "net_driver.h"
  19 #include "bitfield.h"
  20 #include "efx.h"
  21 #include "mac.h"
  22 #include "spi.h"
  23 #include "nic.h"
  24 #include "regs.h"
  25 #include "io.h"
  26 #include "mdio_10g.h"
  27 #include "phy.h"
  28 #include "workarounds.h"
  29
  30 /* Hardware control for SFC4000 (aka Falcon). */
  31
  32 static const unsigned int
  33 /* "Large" EEPROM device: Atmel AT25640 or similar
  34  * 8 KB, 16-bit address, 32 B write block */
  35 large_eeprom_type = ((13 << SPI_DEV_TYPE_SIZE_LBN)
  36                      | (2 << SPI_DEV_TYPE_ADDR_LEN_LBN)
  37                      | (5 << SPI_DEV_TYPE_BLOCK_SIZE_LBN)),
  38 /* Default flash device: Atmel AT25F1024
  39  * 128 KB, 24-bit address, 32 KB erase block, 256 B write block */
  40 default_flash_type = ((17 << SPI_DEV_TYPE_SIZE_LBN)
  41                       | (3 << SPI_DEV_TYPE_ADDR_LEN_LBN)
  42                       | (0x52 << SPI_DEV_TYPE_ERASE_CMD_LBN)
  43                       | (15 << SPI_DEV_TYPE_ERASE_SIZE_LBN)
  44                       | (8 << SPI_DEV_TYPE_BLOCK_SIZE_LBN));
  45
  46 /**************************************************************************
  47  *
  48  * I2C bus - this is a bit-bashing interface using GPIO pins
  49  * Note that it uses the output enables to tristate the outputs
  50  * SDA is the data pin and SCL is the clock
  51  *
  52  **************************************************************************
  53  */
  54 static void falcon_setsda(void *data, int state)
  55 {
  56         struct efx_nic *efx = (struct efx_nic *)data;
  57         efx_oword_t reg;
  58
  59         efx_reado(efx, &reg, FR_AB_GPIO_CTL);
  60         EFX_SET_OWORD_FIELD(reg, FRF_AB_GPIO3_OEN, !state);
  61         efx_writeo(efx, &reg, FR_AB_GPIO_CTL);
  62 }
  63
  64 static void falcon_setscl(void *data, int state)
  65 {
  66         struct efx_nic *efx = (struct efx_nic *)data;
  67         efx_oword_t reg;
  68
  69         efx_reado(efx, &reg, FR_AB_GPIO_CTL);
  70         EFX_SET_OWORD_FIELD(reg, FRF_AB_GPIO0_OEN, !state);
  71         efx_writeo(efx, &reg, FR_AB_GPIO_CTL);
  72 }
  73
  74 static int falcon_getsda(void *data)
  75 {
  76         struct efx_nic *efx = (struct efx_nic *)data;
  77         efx_oword_t reg;
  78
  79         efx_reado(efx, &reg, FR_AB_GPIO_CTL);
  80         return EFX_OWORD_FIELD(reg, FRF_AB_GPIO3_IN);
  81 }
  82
  83 static int falcon_getscl(void *data)
  84 {
  85         struct efx_nic *efx = (struct efx_nic *)data;
  86         efx_oword_t reg;
  87
  88         efx_reado(efx, &reg, FR_AB_GPIO_CTL);
  89         return EFX_OWORD_FIELD(reg, FRF_AB_GPIO0_IN);
  90 }
  91
  92 static struct i2c_algo_bit_data falcon_i2c_bit_operations = {
  93         .setsda         = falcon_setsda,
  94         .setscl         = falcon_setscl,
  95         .getsda         = falcon_getsda,
  96         .getscl         = falcon_getscl,
  97         .udelay         = 5,
  98         /* Wait up to 50 ms for slave to let us pull SCL high */
  99         .timeout        = DIV_ROUND_UP(HZ, 20),
 100 };
 101
 102 static void falcon_push_irq_moderation(struct efx_channel *channel)
 103 {
 104         efx_dword_t timer_cmd;
 105         struct efx_nic *efx = channel->efx;
 106
 107         /* Set timer register */
 108         if (channel->irq_moderation) {
 109                 EFX_POPULATE_DWORD_2(timer_cmd,
 110                                      FRF_AB_TC_TIMER_MODE,
 111                                      FFE_BB_TIMER_MODE_INT_HLDOFF,
 112                                      FRF_AB_TC_TIMER_VAL,
 113                                      channel->irq_moderation - 1);
 114         } else {
 115                 EFX_POPULATE_DWORD_2(timer_cmd,
 116                                      FRF_AB_TC_TIMER_MODE,
 117                                      FFE_BB_TIMER_MODE_DIS,
 118                                      FRF_AB_TC_TIMER_VAL, 0);
 119         }
 120         BUILD_BUG_ON(FR_AA_TIMER_COMMAND_KER != FR_BZ_TIMER_COMMAND_P0);
 121         efx_writed_page_locked(efx, &timer_cmd, FR_BZ_TIMER_COMMAND_P0,
 122                                channel->channel);
 123 }
 124
 125 static void falcon_deconfigure_mac_wrapper(struct efx_nic *efx);
 126
 127 static void falcon_prepare_flush(struct efx_nic *efx)
 128 {
 129         falcon_deconfigure_mac_wrapper(efx);
 130
 131         /* Wait for the tx and rx fifo's to get to the next packet boundary
 132          * (~1ms without back-pressure), then to drain the remainder of the
 133          * fifo's at data path speeds (negligible), with a healthy margin. */
 134         msleep(10);
 135 }
 136
 137 /* Acknowledge a legacy interrupt from Falcon
 138  *
 139  * This acknowledges a legacy (not MSI) interrupt via INT_ACK_KER_REG.
 140  *
 141  * Due to SFC bug 3706 (silicon revision <=A1) reads can be duplicated in the
 142  * BIU. Interrupt acknowledge is read sensitive so must write instead
 143  * (then read to ensure the BIU collector is flushed)
 144  *
 145  * NB most hardware supports MSI interrupts
 146  */
 147 inline void falcon_irq_ack_a1(struct efx_nic *efx)
 148 {
 149         efx_dword_t reg;
 150
 151         EFX_POPULATE_DWORD_1(reg, FRF_AA_INT_ACK_KER_FIELD, 0xb7eb7e);
 152         efx_writed(efx, &reg, FR_AA_INT_ACK_KER);
 153         efx_readd(efx, &reg, FR_AA_WORK_AROUND_BROKEN_PCI_READS);
 154 }
 155
 156
 157 irqreturn_t falcon_legacy_interrupt_a1(int irq, void *dev_id)
 158 {
 159         struct efx_nic *efx = dev_id;
 160         efx_oword_t *int_ker = efx->irq_status.addr;
 161         struct efx_channel *channel;
 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                 EFX_TRACE(efx, "IRQ %d on CPU %d not for me\n", irq,
 170                           raw_smp_processor_id());
 171                 return IRQ_NONE;
 172         }
 173         efx->last_irq_cpu = raw_smp_processor_id();
 174         EFX_TRACE(efx, "IRQ %d on CPU %d status " EFX_OWORD_FMT "\n",
 175                   irq, raw_smp_processor_id(), EFX_OWORD_VAL(*int_ker));
 176
 177         /* Check to see if we have a serious error condition */
 178         syserr = EFX_OWORD_FIELD(*int_ker, FSF_AZ_NET_IVEC_FATAL_INT);
 179         if (unlikely(syserr))
 180                 return efx_nic_fatal_interrupt(efx);
 181
 182         /* Determine interrupting queues, clear interrupt status
 183          * register and acknowledge the device interrupt.
 184          */
 185         BUILD_BUG_ON(FSF_AZ_NET_IVEC_INT_Q_WIDTH > EFX_MAX_CHANNELS);
 186         queues = EFX_OWORD_FIELD(*int_ker, FSF_AZ_NET_IVEC_INT_Q);
 187         EFX_ZERO_OWORD(*int_ker);
 188         wmb(); /* Ensure the vector is cleared before interrupt ack */
 189         falcon_irq_ack_a1(efx);
 190
 191         /* Schedule processing of any interrupting queues */
 192         channel = &efx->channel[0];
 193         while (queues) {
 194                 if (queues & 0x01)
 195                         efx_schedule_channel(channel);
 196                 channel++;
 197                 queues >>= 1;
 198         }
 199
 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                         EFX_ERR(efx, "timed out waiting for SPI\n");
 239                         return -ETIMEDOUT;
 240                 }
 241                 schedule_timeout_uninterruptible(1);
 242         }
 243 }
 244
 245 int falcon_spi_cmd(struct efx_nic *efx, const struct efx_spi_device *spi,
 246                    unsigned int command, int address,
 247                    const void *in, void *out, size_t len)
 248 {
 249         bool addressed = (address >= 0);
 250         bool reading = (out != NULL);
 251         efx_oword_t reg;
 252         int rc;
 253
 254         /* Input validation */
 255         if (len > FALCON_SPI_MAX_LEN)
 256                 return -EINVAL;
 257         BUG_ON(!mutex_is_locked(&efx->spi_lock));
 258
 259         /* Check that previous command is not still running */
 260         rc = falcon_spi_poll(efx);
 261         if (rc)
 262                 return rc;
 263
 264         /* Program address register, if we have an address */
 265         if (addressed) {
 266                 EFX_POPULATE_OWORD_1(reg, FRF_AB_EE_SPI_HADR_ADR, address);
 267                 efx_writeo(efx, &reg, FR_AB_EE_SPI_HADR);
 268         }
 269
 270         /* Program data register, if we have data */
 271         if (in != NULL) {
 272                 memcpy(&reg, in, len);
 273                 efx_writeo(efx, &reg, FR_AB_EE_SPI_HDATA);
 274         }
 275
 276         /* Issue read/write command */
 277         EFX_POPULATE_OWORD_7(reg,
 278                              FRF_AB_EE_SPI_HCMD_CMD_EN, 1,
 279                              FRF_AB_EE_SPI_HCMD_SF_SEL, spi->device_id,
 280                              FRF_AB_EE_SPI_HCMD_DABCNT, len,
 281                              FRF_AB_EE_SPI_HCMD_READ, reading,
 282                              FRF_AB_EE_SPI_HCMD_DUBCNT, 0,
 283                              FRF_AB_EE_SPI_HCMD_ADBCNT,
 284                              (addressed ? spi->addr_len : 0),
 285                              FRF_AB_EE_SPI_HCMD_ENC, command);
 286         efx_writeo(efx, &reg, FR_AB_EE_SPI_HCMD);
 287
 288         /* Wait for read/write to complete */
 289         rc = falcon_spi_wait(efx);
 290         if (rc)
 291                 return rc;
 292
 293         /* Read data */
 294         if (out != NULL) {
 295                 efx_reado(efx, &reg, FR_AB_EE_SPI_HDATA);
 296                 memcpy(out, &reg, len);
 297         }
 298
 299         return 0;
 300 }
 301
 302 static size_t
 303 falcon_spi_write_limit(const struct efx_spi_device *spi, size_t start)
 304 {
 305         return min(FALCON_SPI_MAX_LEN,
 306                    (spi->block_size - (start & (spi->block_size - 1))));
 307 }
 308
 309 static inline u8
 310 efx_spi_munge_command(const struct efx_spi_device *spi,
 311                       const u8 command, const unsigned int address)
 312 {
 313         return command | (((address >> 8) & spi->munge_address) << 3);
 314 }
 315
 316 /* Wait up to 10 ms for buffered write completion */
 317 int
 318 falcon_spi_wait_write(struct efx_nic *efx, const struct efx_spi_device *spi)
 319 {
 320         unsigned long timeout = jiffies + 1 + DIV_ROUND_UP(HZ, 100);
 321         u8 status;
 322         int rc;
 323
 324         for (;;) {
 325                 rc = falcon_spi_cmd(efx, spi, SPI_RDSR, -1, NULL,
 326                                     &status, sizeof(status));
 327                 if (rc)
 328                         return rc;
 329                 if (!(status & SPI_STATUS_NRDY))
 330                         return 0;
 331                 if (time_after_eq(jiffies, timeout)) {
 332                         EFX_ERR(efx, "SPI write timeout on device %d"
 333                                 " last status=0x%02x\n",
 334                                 spi->device_id, status);
 335                         return -ETIMEDOUT;
 336                 }
 337                 schedule_timeout_uninterruptible(1);
 338         }
 339 }
 340
 341 int falcon_spi_read(struct efx_nic *efx, const struct efx_spi_device *spi,
 342                     loff_t start, size_t len, size_t *retlen, u8 *buffer)
 343 {
 344         size_t block_len, pos = 0;
 345         unsigned int command;
 346         int rc = 0;
 347
 348         while (pos < len) {
 349                 block_len = min(len - pos, FALCON_SPI_MAX_LEN);
 350
 351                 command = efx_spi_munge_command(spi, SPI_READ, start + pos);
 352                 rc = falcon_spi_cmd(efx, spi, command, start + pos, NULL,
 353                                     buffer + pos, block_len);
 354                 if (rc)
 355                         break;
 356                 pos += block_len;
 357
 358                 /* Avoid locking up the system */
 359                 cond_resched();
 360                 if (signal_pending(current)) {
 361                         rc = -EINTR;
 362                         break;
 363                 }
 364         }
 365
 366         if (retlen)
 367                 *retlen = pos;
 368         return rc;
 369 }
 370
 371 int
 372 falcon_spi_write(struct efx_nic *efx, const struct efx_spi_device *spi,
 373                  loff_t start, size_t len, size_t *retlen, const u8 *buffer)
 374 {
 375         u8 verify_buffer[FALCON_SPI_MAX_LEN];
 376         size_t block_len, pos = 0;
 377         unsigned int command;
 378         int rc = 0;
 379
 380         while (pos < len) {
 381                 rc = falcon_spi_cmd(efx, spi, SPI_WREN, -1, NULL, NULL, 0);
 382                 if (rc)
 383                         break;
 384
 385                 block_len = min(len - pos,
 386                                 falcon_spi_write_limit(spi, start + pos));
 387                 command = efx_spi_munge_command(spi, SPI_WRITE, start + pos);
 388                 rc = falcon_spi_cmd(efx, spi, command, start + pos,
 389                                     buffer + pos, NULL, block_len);
 390                 if (rc)
 391                         break;
 392
 393                 rc = falcon_spi_wait_write(efx, spi);
 394                 if (rc)
 395                         break;
 396
 397                 command = efx_spi_munge_command(spi, SPI_READ, start + pos);
 398                 rc = falcon_spi_cmd(efx, spi, command, start + pos,
 399                                     NULL, verify_buffer, block_len);
 400                 if (memcmp(verify_buffer, buffer + pos, block_len)) {
 401                         rc = -EIO;
 402                         break;
 403                 }
 404
 405                 pos += block_len;
 406
 407                 /* Avoid locking up the system */
 408                 cond_resched();
 409                 if (signal_pending(current)) {
 410                         rc = -EINTR;
 411                         break;
 412                 }
 413         }
 414
 415         if (retlen)
 416                 *retlen = pos;
 417         return rc;
 418 }
 419
 420 /**************************************************************************
 421  *
 422  * MAC wrapper
 423  *
 424  **************************************************************************
 425  */
 426
 427 static void falcon_push_multicast_hash(struct efx_nic *efx)
 428 {
 429         union efx_multicast_hash *mc_hash = &efx->multicast_hash;
 430
 431         WARN_ON(!mutex_is_locked(&efx->mac_lock));
 432
 433         efx_writeo(efx, &mc_hash->oword[0], FR_AB_MAC_MC_HASH_REG0);
 434         efx_writeo(efx, &mc_hash->oword[1], FR_AB_MAC_MC_HASH_REG1);
 435 }
 436
 437 static void falcon_reset_macs(struct efx_nic *efx)
 438 {
 439         struct falcon_nic_data *nic_data = efx->nic_data;
 440         efx_oword_t reg, mac_ctrl;
 441         int count;
 442
 443         if (efx_nic_rev(efx) < EFX_REV_FALCON_B0) {
 444                 /* It's not safe to use GLB_CTL_REG to reset the
 445                  * macs, so instead use the internal MAC resets
 446                  */
 447                 if (!EFX_IS10G(efx)) {
 448                         EFX_POPULATE_OWORD_1(reg, FRF_AB_GM_SW_RST, 1);
 449                         efx_writeo(efx, &reg, FR_AB_GM_CFG1);
 450                         udelay(1000);
 451
 452                         EFX_POPULATE_OWORD_1(reg, FRF_AB_GM_SW_RST, 0);
 453                         efx_writeo(efx, &reg, FR_AB_GM_CFG1);
 454                         udelay(1000);
 455                         return;
 456                 } else {
 457                         EFX_POPULATE_OWORD_1(reg, FRF_AB_XM_CORE_RST, 1);
 458                         efx_writeo(efx, &reg, FR_AB_XM_GLB_CFG);
 459
 460                         for (count = 0; count < 10000; count++) {
 461                                 efx_reado(efx, &reg, FR_AB_XM_GLB_CFG);
 462                                 if (EFX_OWORD_FIELD(reg, FRF_AB_XM_CORE_RST) ==
 463                                     0)
 464                                         return;
 465                                 udelay(10);
 466                         }
 467
 468                         EFX_ERR(efx, "timed out waiting for XMAC core reset\n");
 469                 }
 470         }
 471
 472         /* Mac stats will fail whist the TX fifo is draining */
 473         WARN_ON(nic_data->stats_disable_count == 0);
 474
 475         efx_reado(efx, &mac_ctrl, FR_AB_MAC_CTRL);
 476         EFX_SET_OWORD_FIELD(mac_ctrl, FRF_BB_TXFIFO_DRAIN_EN, 1);
 477         efx_writeo(efx, &mac_ctrl, FR_AB_MAC_CTRL);
 478
 479         efx_reado(efx, &reg, FR_AB_GLB_CTL);
 480         EFX_SET_OWORD_FIELD(reg, FRF_AB_RST_XGTX, 1);
 481         EFX_SET_OWORD_FIELD(reg, FRF_AB_RST_XGRX, 1);
 482         EFX_SET_OWORD_FIELD(reg, FRF_AB_RST_EM, 1);
 483         efx_writeo(efx, &reg, FR_AB_GLB_CTL);
 484
 485         count = 0;
 486         while (1) {
 487                 efx_reado(efx, &reg, FR_AB_GLB_CTL);
 488                 if (!EFX_OWORD_FIELD(reg, FRF_AB_RST_XGTX) &&
 489                     !EFX_OWORD_FIELD(reg, FRF_AB_RST_XGRX) &&
 490                     !EFX_OWORD_FIELD(reg, FRF_AB_RST_EM)) {
 491                         EFX_LOG(efx, "Completed MAC reset after %d loops\n",
 492                                 count);
 493                         break;
 494                 }
 495                 if (count > 20) {
 496                         EFX_ERR(efx, "MAC reset failed\n");
 497                         break;
 498                 }
 499                 count++;
 500                 udelay(10);
 501         }
 502
 503         /* Ensure the correct MAC is selected before statistics
 504          * are re-enabled by the caller */
 505         efx_writeo(efx, &mac_ctrl, FR_AB_MAC_CTRL);
 506 }
 507
 508 void falcon_drain_tx_fifo(struct efx_nic *efx)
 509 {
 510         efx_oword_t reg;
 511
 512         if ((efx_nic_rev(efx) < EFX_REV_FALCON_B0) ||
 513             (efx->loopback_mode != LOOPBACK_NONE))
 514                 return;
 515
 516         efx_reado(efx, &reg, FR_AB_MAC_CTRL);
 517         /* There is no point in draining more than once */
 518         if (EFX_OWORD_FIELD(reg, FRF_BB_TXFIFO_DRAIN_EN))
 519                 return;
 520
 521         falcon_reset_macs(efx);
 522 }
 523
 524 static void falcon_deconfigure_mac_wrapper(struct efx_nic *efx)
 525 {
 526         efx_oword_t reg;
 527
 528         if (efx_nic_rev(efx) < EFX_REV_FALCON_B0)
 529                 return;
 530
 531         /* Isolate the MAC -> RX */
 532         efx_reado(efx, &reg, FR_AZ_RX_CFG);
 533         EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_INGR_EN, 0);
 534         efx_writeo(efx, &reg, FR_AZ_RX_CFG);
 535
 536         /* Isolate TX -> MAC */
 537         falcon_drain_tx_fifo(efx);
 538 }
 539
 540 void falcon_reconfigure_mac_wrapper(struct efx_nic *efx)
 541 {
 542         struct efx_link_state *link_state = &efx->link_state;
 543         efx_oword_t reg;
 544         int link_speed;
 545
 546         switch (link_state->speed) {
 547         case 10000: link_speed = 3; break;
 548         case 1000:  link_speed = 2; break;
 549         case 100:   link_speed = 1; break;
 550         default:    link_speed = 0; break;
 551         }
 552         /* MAC_LINK_STATUS controls MAC backpressure but doesn't work
 553          * as advertised.  Disable to ensure packets are not
 554          * indefinitely held and TX queue can be flushed at any point
 555          * while the link is down. */
 556         EFX_POPULATE_OWORD_5(reg,
 557                              FRF_AB_MAC_XOFF_VAL, 0xffff /* max pause time */,
 558                              FRF_AB_MAC_BCAD_ACPT, 1,
 559                              FRF_AB_MAC_UC_PROM, efx->promiscuous,
 560                              FRF_AB_MAC_LINK_STATUS, 1, /* always set */
 561                              FRF_AB_MAC_SPEED, link_speed);
 562         /* On B0, MAC backpressure can be disabled and packets get
 563          * discarded. */
 564         if (efx_nic_rev(efx) >= EFX_REV_FALCON_B0) {
 565                 EFX_SET_OWORD_FIELD(reg, FRF_BB_TXFIFO_DRAIN_EN,
 566                                     !link_state->up);
 567         }
 568
 569         efx_writeo(efx, &reg, FR_AB_MAC_CTRL);
 570
 571         /* Restore the multicast hash registers. */
 572         falcon_push_multicast_hash(efx);
 573
 574         efx_reado(efx, &reg, FR_AZ_RX_CFG);
 575         /* Enable XOFF signal from RX FIFO (we enabled it during NIC
 576          * initialisation but it may read back as 0) */
 577         EFX_SET_OWORD_FIELD(reg, FRF_AZ_RX_XOFF_MAC_EN, 1);
 578         /* Unisolate the MAC -> RX */
 579         if (efx_nic_rev(efx) >= EFX_REV_FALCON_B0)
 580                 EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_INGR_EN, 1);
 581         efx_writeo(efx, &reg, FR_AZ_RX_CFG);
 582 }
 583
 584 static void falcon_stats_request(struct efx_nic *efx)
 585 {
 586         struct falcon_nic_data *nic_data = efx->nic_data;
 587         efx_oword_t reg;
 588
 589         WARN_ON(nic_data->stats_pending);
 590         WARN_ON(nic_data->stats_disable_count);
 591
 592         if (nic_data->stats_dma_done == NULL)
 593                 return; /* no mac selected */
 594
 595         *nic_data->stats_dma_done = FALCON_STATS_NOT_DONE;
 596         nic_data->stats_pending = true;
 597         wmb(); /* ensure done flag is clear */
 598
 599         /* Initiate DMA transfer of stats */
 600         EFX_POPULATE_OWORD_2(reg,
 601                              FRF_AB_MAC_STAT_DMA_CMD, 1,
 602                              FRF_AB_MAC_STAT_DMA_ADR,
 603                              efx->stats_buffer.dma_addr);
 604         efx_writeo(efx, &reg, FR_AB_MAC_STAT_DMA);
 605
 606         mod_timer(&nic_data->stats_timer, round_jiffies_up(jiffies + HZ / 2));
 607 }
 608
 609 static void falcon_stats_complete(struct efx_nic *efx)
 610 {
 611         struct falcon_nic_data *nic_data = efx->nic_data;
 612
 613         if (!nic_data->stats_pending)
 614                 return;
 615
 616         nic_data->stats_pending = 0;
 617         if (*nic_data->stats_dma_done == FALCON_STATS_DONE) {
 618                 rmb(); /* read the done flag before the stats */
 619                 efx->mac_op->update_stats(efx);
 620         } else {
 621                 EFX_ERR(efx, "timed out waiting for statistics\n");
 622         }
 623 }
 624
 625 static void falcon_stats_timer_func(unsigned long context)
 626 {
 627         struct efx_nic *efx = (struct efx_nic *)context;
 628         struct falcon_nic_data *nic_data = efx->nic_data;
 629
 630         spin_lock(&efx->stats_lock);
 631
 632         falcon_stats_complete(efx);
 633         if (nic_data->stats_disable_count == 0)
 634                 falcon_stats_request(efx);
 635
 636         spin_unlock(&efx->stats_lock);
 637 }
 638
 639 static void falcon_switch_mac(struct efx_nic *efx);
 640
 641 static bool falcon_loopback_link_poll(struct efx_nic *efx)
 642 {
 643         struct efx_link_state old_state = efx->link_state;
 644
 645         WARN_ON(!mutex_is_locked(&efx->mac_lock));
 646         WARN_ON(!LOOPBACK_INTERNAL(efx));
 647
 648         efx->link_state.fd = true;
 649         efx->link_state.fc = efx->wanted_fc;
 650         efx->link_state.up = true;
 651
 652         if (efx->loopback_mode == LOOPBACK_GMAC)
 653                 efx->link_state.speed = 1000;
 654         else
 655                 efx->link_state.speed = 10000;
 656
 657         return !efx_link_state_equal(&efx->link_state, &old_state);
 658 }
 659
 660 static int falcon_reconfigure_port(struct efx_nic *efx)
 661 {
 662         int rc;
 663
 664         WARN_ON(efx_nic_rev(efx) > EFX_REV_FALCON_B0);
 665
 666         /* Poll the PHY link state *before* reconfiguring it. This means we
 667          * will pick up the correct speed (in loopback) to select the correct
 668          * MAC.
 669          */
 670         if (LOOPBACK_INTERNAL(efx))
 671                 falcon_loopback_link_poll(efx);
 672         else
 673                 efx->phy_op->poll(efx);
 674
 675         falcon_stop_nic_stats(efx);
 676         falcon_deconfigure_mac_wrapper(efx);
 677
 678         falcon_switch_mac(efx);
 679
 680         efx->phy_op->reconfigure(efx);
 681         rc = efx->mac_op->reconfigure(efx);
 682         BUG_ON(rc);
 683
 684         falcon_start_nic_stats(efx);
 685
 686         /* Synchronise efx->link_state with the kernel */
 687         efx_link_status_changed(efx);
 688
 689         return 0;
 690 }
 691
 692 /**************************************************************************
 693  *
 694  * PHY access via GMII
 695  *
 696  **************************************************************************
 697  */
 698
 699 /* Wait for GMII access to complete */
 700 static int falcon_gmii_wait(struct efx_nic *efx)
 701 {
 702         efx_oword_t md_stat;
 703         int count;
 704
 705         /* wait upto 50ms - taken max from datasheet */
 706         for (count = 0; count < 5000; count++) {
 707                 efx_reado(efx, &md_stat, FR_AB_MD_STAT);
 708                 if (EFX_OWORD_FIELD(md_stat, FRF_AB_MD_BSY) == 0) {
 709                         if (EFX_OWORD_FIELD(md_stat, FRF_AB_MD_LNFL) != 0 ||
 710                             EFX_OWORD_FIELD(md_stat, FRF_AB_MD_BSERR) != 0) {
 711                                 EFX_ERR(efx, "error from GMII access "
 712                                         EFX_OWORD_FMT"\n",
 713                                         EFX_OWORD_VAL(md_stat));
 714                                 return -EIO;
 715                         }
 716                         return 0;
 717                 }
 718                 udelay(10);
 719         }
 720         EFX_ERR(efx, "timed out waiting for GMII\n");
 721         return -ETIMEDOUT;
 722 }
 723
 724 /* Write an MDIO register of a PHY connected to Falcon. */
 725 static int falcon_mdio_write(struct net_device *net_dev,
 726                              int prtad, int devad, u16 addr, u16 value)
 727 {
 728         struct efx_nic *efx = netdev_priv(net_dev);
 729         efx_oword_t reg;
 730         int rc;
 731
 732         EFX_REGDUMP(efx, "writing MDIO %d register %d.%d with 0x%04x\n",
 733                     prtad, devad, addr, value);
 734
 735         mutex_lock(&efx->mdio_lock);
 736
 737         /* Check MDIO not currently being accessed */
 738         rc = falcon_gmii_wait(efx);
 739         if (rc)
 740                 goto out;
 741
 742         /* Write the address/ID register */
 743         EFX_POPULATE_OWORD_1(reg, FRF_AB_MD_PHY_ADR, addr);
 744         efx_writeo(efx, &reg, FR_AB_MD_PHY_ADR);
 745
 746         EFX_POPULATE_OWORD_2(reg, FRF_AB_MD_PRT_ADR, prtad,
 747                              FRF_AB_MD_DEV_ADR, devad);
 748         efx_writeo(efx, &reg, FR_AB_MD_ID);
 749
 750         /* Write data */
 751         EFX_POPULATE_OWORD_1(reg, FRF_AB_MD_TXD, value);
 752         efx_writeo(efx, &reg, FR_AB_MD_TXD);
 753
 754         EFX_POPULATE_OWORD_2(reg,
 755                              FRF_AB_MD_WRC, 1,
 756                              FRF_AB_MD_GC, 0);
 757         efx_writeo(efx, &reg, FR_AB_MD_CS);
 758
 759         /* Wait for data to be written */
 760         rc = falcon_gmii_wait(efx);
 761         if (rc) {
 762                 /* Abort the write operation */
 763                 EFX_POPULATE_OWORD_2(reg,
 764                                      FRF_AB_MD_WRC, 0,
 765                                      FRF_AB_MD_GC, 1);
 766                 efx_writeo(efx, &reg, FR_AB_MD_CS);
 767                 udelay(10);
 768         }
 769
 770 out:
 771         mutex_unlock(&efx->mdio_lock);
 772         return rc;
 773 }
 774
 775 /* Read an MDIO register of a PHY connected to Falcon. */
 776 static int falcon_mdio_read(struct net_device *net_dev,
 777                             int prtad, int devad, u16 addr)
 778 {
 779         struct efx_nic *efx = netdev_priv(net_dev);
 780         efx_oword_t reg;
 781         int rc;
 782
 783         mutex_lock(&efx->mdio_lock);
 784
 785         /* Check MDIO not currently being accessed */
 786         rc = falcon_gmii_wait(efx);
 787         if (rc)
 788                 goto out;
 789
 790         EFX_POPULATE_OWORD_1(reg, FRF_AB_MD_PHY_ADR, addr);
 791         efx_writeo(efx, &reg, FR_AB_MD_PHY_ADR);
 792
 793         EFX_POPULATE_OWORD_2(reg, FRF_AB_MD_PRT_ADR, prtad,
 794                              FRF_AB_MD_DEV_ADR, devad);
 795         efx_writeo(efx, &reg, FR_AB_MD_ID);
 796
 797         /* Request data to be read */
 798         EFX_POPULATE_OWORD_2(reg, FRF_AB_MD_RDC, 1, FRF_AB_MD_GC, 0);
 799         efx_writeo(efx, &reg, FR_AB_MD_CS);
 800
 801         /* Wait for data to become available */
 802         rc = falcon_gmii_wait(efx);
 803         if (rc == 0) {
 804                 efx_reado(efx, &reg, FR_AB_MD_RXD);
 805                 rc = EFX_OWORD_FIELD(reg, FRF_AB_MD_RXD);
 806                 EFX_REGDUMP(efx, "read from MDIO %d register %d.%d, got %04x\n",
 807                             prtad, devad, addr, rc);
 808         } else {
 809                 /* Abort the read operation */
 810                 EFX_POPULATE_OWORD_2(reg,
 811                                      FRF_AB_MD_RIC, 0,
 812                                      FRF_AB_MD_GC, 1);
 813                 efx_writeo(efx, &reg, FR_AB_MD_CS);
 814
 815                 EFX_LOG(efx, "read from MDIO %d register %d.%d, got error %d\n",
 816                         prtad, devad, addr, rc);
 817         }
 818
 819 out:
 820         mutex_unlock(&efx->mdio_lock);
 821         return rc;
 822 }
 823
 824 static void falcon_clock_mac(struct efx_nic *efx)
 825 {
 826         unsigned strap_val;
 827         efx_oword_t nic_stat;
 828
 829         /* Configure the NIC generated MAC clock correctly */
 830         efx_reado(efx, &nic_stat, FR_AB_NIC_STAT);
 831         strap_val = EFX_IS10G(efx) ? 5 : 3;
 832         if (efx_nic_rev(efx) >= EFX_REV_FALCON_B0) {
 833                 EFX_SET_OWORD_FIELD(nic_stat, FRF_BB_EE_STRAP_EN, 1);
 834                 EFX_SET_OWORD_FIELD(nic_stat, FRF_BB_EE_STRAP, strap_val);
 835                 efx_writeo(efx, &nic_stat, FR_AB_NIC_STAT);
 836         } else {
 837                 /* Falcon A1 does not support 1G/10G speed switching
 838                  * and must not be used with a PHY that does. */
 839                 BUG_ON(EFX_OWORD_FIELD(nic_stat, FRF_AB_STRAP_PINS) !=
 840                        strap_val);
 841         }
 842 }
 843
 844 static void falcon_switch_mac(struct efx_nic *efx)
 845 {
 846         struct efx_mac_operations *old_mac_op = efx->mac_op;
 847         struct falcon_nic_data *nic_data = efx->nic_data;
 848         unsigned int stats_done_offset;
 849
 850         WARN_ON(!mutex_is_locked(&efx->mac_lock));
 851         WARN_ON(nic_data->stats_disable_count == 0);
 852
 853         efx->mac_op = (EFX_IS10G(efx) ?
 854                        &falcon_xmac_operations : &falcon_gmac_operations);
 855
 856         if (EFX_IS10G(efx))
 857                 stats_done_offset = XgDmaDone_offset;
 858         else
 859                 stats_done_offset = GDmaDone_offset;
 860         nic_data->stats_dma_done = efx->stats_buffer.addr + stats_done_offset;
 861
 862         if (old_mac_op == efx->mac_op)
 863                 return;
 864
 865         falcon_clock_mac(efx);
 866
 867         EFX_LOG(efx, "selected %cMAC\n", EFX_IS10G(efx) ? 'X' : 'G');
 868         /* Not all macs support a mac-level link state */
 869         efx->xmac_poll_required = false;
 870         falcon_reset_macs(efx);
 871 }
 872
 873 /* This call is responsible for hooking in the MAC and PHY operations */
 874 static int falcon_probe_port(struct efx_nic *efx)
 875 {
 876         int rc;
 877
 878         switch (efx->phy_type) {
 879         case PHY_TYPE_SFX7101:
 880                 efx->phy_op = &falcon_sfx7101_phy_ops;
 881                 break;
 882         case PHY_TYPE_SFT9001A:
 883         case PHY_TYPE_SFT9001B:
 884                 efx->phy_op = &falcon_sft9001_phy_ops;
 885                 break;
 886         case PHY_TYPE_QT2022C2:
 887         case PHY_TYPE_QT2025C:
 888                 efx->phy_op = &falcon_qt202x_phy_ops;
 889                 break;
 890         default:
 891                 EFX_ERR(efx, "Unknown PHY type %d\n",
 892                         efx->phy_type);
 893                 return -ENODEV;
 894         }
 895
 896         /* Fill out MDIO structure and loopback modes */
 897         efx->mdio.mdio_read = falcon_mdio_read;
 898         efx->mdio.mdio_write = falcon_mdio_write;
 899         rc = efx->phy_op->probe(efx);
 900         if (rc != 0)
 901                 return rc;
 902
 903         /* Initial assumption */
 904         efx->link_state.speed = 10000;
 905         efx->link_state.fd = true;
 906
 907         /* Hardware flow ctrl. FalconA RX FIFO too small for pause generation */
 908         if (efx_nic_rev(efx) >= EFX_REV_FALCON_B0)
 909                 efx->wanted_fc = EFX_FC_RX | EFX_FC_TX;
 910         else
 911                 efx->wanted_fc = EFX_FC_RX;
 912
 913         /* Allocate buffer for stats */
 914         rc = efx_nic_alloc_buffer(efx, &efx->stats_buffer,
 915                                   FALCON_MAC_STATS_SIZE);
 916         if (rc)
 917                 return rc;
 918         EFX_LOG(efx, "stats buffer at %llx (virt %p phys %llx)\n",
 919                 (u64)efx->stats_buffer.dma_addr,
 920                 efx->stats_buffer.addr,
 921                 (u64)virt_to_phys(efx->stats_buffer.addr));
 922
 923         return 0;
 924 }
 925
 926 static void falcon_remove_port(struct efx_nic *efx)
 927 {
 928         efx->phy_op->remove(efx);
 929         efx_nic_free_buffer(efx, &efx->stats_buffer);
 930 }
 931
 932 /**************************************************************************
 933  *
 934  * Falcon test code
 935  *
 936  **************************************************************************/
 937
 938 static int
 939 falcon_read_nvram(struct efx_nic *efx, struct falcon_nvconfig *nvconfig_out)
 940 {
 941         struct falcon_nvconfig *nvconfig;
 942         struct efx_spi_device *spi;
 943         void *region;
 944         int rc, magic_num, struct_ver;
 945         __le16 *word, *limit;
 946         u32 csum;
 947
 948         spi = efx->spi_flash ? efx->spi_flash : efx->spi_eeprom;
 949         if (!spi)
 950                 return -EINVAL;
 951
 952         region = kmalloc(FALCON_NVCONFIG_END, GFP_KERNEL);
 953         if (!region)
 954                 return -ENOMEM;
 955         nvconfig = region + FALCON_NVCONFIG_OFFSET;
 956
 957         mutex_lock(&efx->spi_lock);
 958         rc = falcon_spi_read(efx, spi, 0, FALCON_NVCONFIG_END, NULL, region);
 959         mutex_unlock(&efx->spi_lock);
 960         if (rc) {
 961                 EFX_ERR(efx, "Failed to read %s\n",
 962                         efx->spi_flash ? "flash" : "EEPROM");
 963                 rc = -EIO;
 964                 goto out;
 965         }
 966
 967         magic_num = le16_to_cpu(nvconfig->board_magic_num);
 968         struct_ver = le16_to_cpu(nvconfig->board_struct_ver);
 969
 970         rc = -EINVAL;
 971         if (magic_num != FALCON_NVCONFIG_BOARD_MAGIC_NUM) {
 972                 EFX_ERR(efx, "NVRAM bad magic 0x%x\n", magic_num);
 973                 goto out;
 974         }
 975         if (struct_ver < 2) {
 976                 EFX_ERR(efx, "NVRAM has ancient version 0x%x\n", struct_ver);
 977                 goto out;
 978         } else if (struct_ver < 4) {
 979                 word = &nvconfig->board_magic_num;
 980                 limit = (__le16 *) (nvconfig + 1);
 981         } else {
 982                 word = region;
 983                 limit = region + FALCON_NVCONFIG_END;
 984         }
 985         for (csum = 0; word < limit; ++word)
 986                 csum += le16_to_cpu(*word);
 987
 988         if (~csum & 0xffff) {
 989                 EFX_ERR(efx, "NVRAM has incorrect checksum\n");
 990                 goto out;
 991         }
 992
 993         rc = 0;
 994         if (nvconfig_out)
 995                 memcpy(nvconfig_out, nvconfig, sizeof(*nvconfig));
 996
 997  out:
 998         kfree(region);
 999         return rc;
1000 }
1001
1002 static int falcon_test_nvram(struct efx_nic *efx)
1003 {
1004         return falcon_read_nvram(efx, NULL);
1005 }
1006
1007 static const struct efx_nic_register_test falcon_b0_register_tests[] = {
1008         { FR_AZ_ADR_REGION,
1009           EFX_OWORD32(0x0001FFFF, 0x0001FFFF, 0x0001FFFF, 0x0001FFFF) },
1010         { FR_AZ_RX_CFG,
1011           EFX_OWORD32(0xFFFFFFFE, 0x00017FFF, 0x00000000, 0x00000000) },
1012         { FR_AZ_TX_CFG,
1013           EFX_OWORD32(0x7FFF0037, 0x00000000, 0x00000000, 0x00000000) },
1014         { FR_AZ_TX_RESERVED,
1015           EFX_OWORD32(0xFFFEFE80, 0x1FFFFFFF, 0x020000FE, 0x007FFFFF) },
1016         { FR_AB_MAC_CTRL,
1017           EFX_OWORD32(0xFFFF0000, 0x00000000, 0x00000000, 0x00000000) },
1018         { FR_AZ_SRM_TX_DC_CFG,
1019           EFX_OWORD32(0x001FFFFF, 0x00000000, 0x00000000, 0x00000000) },
1020         { FR_AZ_RX_DC_CFG,
1021           EFX_OWORD32(0x0000000F, 0x00000000, 0x00000000, 0x00000000) },
1022         { FR_AZ_RX_DC_PF_WM,
1023           EFX_OWORD32(0x000003FF, 0x00000000, 0x00000000, 0x00000000) },
1024         { FR_BZ_DP_CTRL,
1025           EFX_OWORD32(0x00000FFF, 0x00000000, 0x00000000, 0x00000000) },
1026         { FR_AB_GM_CFG2,
1027           EFX_OWORD32(0x00007337, 0x00000000, 0x00000000, 0x00000000) },
1028         { FR_AB_GMF_CFG0,
1029           EFX_OWORD32(0x00001F1F, 0x00000000, 0x00000000, 0x00000000) },
1030         { FR_AB_XM_GLB_CFG,
1031           EFX_OWORD32(0x00000C68, 0x00000000, 0x00000000, 0x00000000) },
1032         { FR_AB_XM_TX_CFG,
1033           EFX_OWORD32(0x00080164, 0x00000000, 0x00000000, 0x00000000) },
1034         { FR_AB_XM_RX_CFG,
1035           EFX_OWORD32(0x07100A0C, 0x00000000, 0x00000000, 0x00000000) },
1036         { FR_AB_XM_RX_PARAM,
1037           EFX_OWORD32(0x00001FF8, 0x00000000, 0x00000000, 0x00000000) },
1038         { FR_AB_XM_FC,
1039           EFX_OWORD32(0xFFFF0001, 0x00000000, 0x00000000, 0x00000000) },
1040         { FR_AB_XM_ADR_LO,
1041           EFX_OWORD32(0xFFFFFFFF, 0x00000000, 0x00000000, 0x00000000) },
1042         { FR_AB_XX_SD_CTL,
1043           EFX_OWORD32(0x0003FF0F, 0x00000000, 0x00000000, 0x00000000) },
1044 };
1045
1046 static int falcon_b0_test_registers(struct efx_nic *efx)
1047 {
1048         return efx_nic_test_registers(efx, falcon_b0_register_tests,
1049                                       ARRAY_SIZE(falcon_b0_register_tests));
1050 }
1051
1052 /**************************************************************************
1053  *
1054  * Device reset
1055  *
1056  **************************************************************************
1057  */
1058
1059 /* Resets NIC to known state.  This routine must be called in process
1060  * context and is allowed to sleep. */
1061 static int falcon_reset_hw(struct efx_nic *efx, enum reset_type method)
1062 {
1063         struct falcon_nic_data *nic_data = efx->nic_data;
1064         efx_oword_t glb_ctl_reg_ker;
1065         int rc;
1066
1067         EFX_LOG(efx, "performing %s hardware reset\n", RESET_TYPE(method));
1068
1069         /* Initiate device reset */
1070         if (method == RESET_TYPE_WORLD) {
1071                 rc = pci_save_state(efx->pci_dev);
1072                 if (rc) {
1073                         EFX_ERR(efx, "failed to backup PCI state of primary "
1074                                 "function prior to hardware reset\n");
1075                         goto fail1;
1076                 }
1077                 if (efx_nic_is_dual_func(efx)) {
1078                         rc = pci_save_state(nic_data->pci_dev2);
1079                         if (rc) {
1080                                 EFX_ERR(efx, "failed to backup PCI state of "
1081                                         "secondary function prior to "
1082                                         "hardware reset\n");
1083                                 goto fail2;
1084                         }
1085                 }
1086
1087                 EFX_POPULATE_OWORD_2(glb_ctl_reg_ker,
1088                                      FRF_AB_EXT_PHY_RST_DUR,
1089                                      FFE_AB_EXT_PHY_RST_DUR_10240US,
1090                                      FRF_AB_SWRST, 1);
1091         } else {
1092                 EFX_POPULATE_OWORD_7(glb_ctl_reg_ker,
1093                                      /* exclude PHY from "invisible" reset */
1094                                      FRF_AB_EXT_PHY_RST_CTL,
1095                                      method == RESET_TYPE_INVISIBLE,
1096                                      /* exclude EEPROM/flash and PCIe */
1097                                      FRF_AB_PCIE_CORE_RST_CTL, 1,
1098                                      FRF_AB_PCIE_NSTKY_RST_CTL, 1,
1099                                      FRF_AB_PCIE_SD_RST_CTL, 1,
1100                                      FRF_AB_EE_RST_CTL, 1,
1101                                      FRF_AB_EXT_PHY_RST_DUR,
1102                                      FFE_AB_EXT_PHY_RST_DUR_10240US,
1103                                      FRF_AB_SWRST, 1);
1104         }
1105         efx_writeo(efx, &glb_ctl_reg_ker, FR_AB_GLB_CTL);
1106
1107         EFX_LOG(efx, "waiting for hardware reset\n");
1108         schedule_timeout_uninterruptible(HZ / 20);
1109
1110         /* Restore PCI configuration if needed */
1111         if (method == RESET_TYPE_WORLD) {
1112                 if (efx_nic_is_dual_func(efx)) {
1113                         rc = pci_restore_state(nic_data->pci_dev2);
1114                         if (rc) {
1115                                 EFX_ERR(efx, "failed to restore PCI config for "
1116                                         "the secondary function\n");
1117                                 goto fail3;
1118                         }
1119                 }
1120                 rc = pci_restore_state(efx->pci_dev);
1121                 if (rc) {
1122                         EFX_ERR(efx, "failed to restore PCI config for the "
1123                                 "primary function\n");
1124                         goto fail4;
1125                 }
1126                 EFX_LOG(efx, "successfully restored PCI config\n");
1127         }
1128
1129         /* Assert that reset complete */
1130         efx_reado(efx, &glb_ctl_reg_ker, FR_AB_GLB_CTL);
1131         if (EFX_OWORD_FIELD(glb_ctl_reg_ker, FRF_AB_SWRST) != 0) {
1132                 rc = -ETIMEDOUT;
1133                 EFX_ERR(efx, "timed out waiting for hardware reset\n");
1134                 goto fail5;
1135         }
1136         EFX_LOG(efx, "hardware reset complete\n");
1137
1138         return 0;
1139
1140         /* pci_save_state() and pci_restore_state() MUST be called in pairs */
1141 fail2:
1142 fail3:
1143         pci_restore_state(efx->pci_dev);
1144 fail1:
1145 fail4:
1146 fail5:
1147         return rc;
1148 }
1149
1150 static void falcon_monitor(struct efx_nic *efx)
1151 {
1152         bool link_changed;
1153         int rc;
1154
1155         BUG_ON(!mutex_is_locked(&efx->mac_lock));
1156
1157         rc = falcon_board(efx)->type->monitor(efx);
1158         if (rc) {
1159                 EFX_ERR(efx, "Board sensor %s; shutting down PHY\n",
1160                         (rc == -ERANGE) ? "reported fault" : "failed");
1161                 efx->phy_mode |= PHY_MODE_LOW_POWER;
1162                 rc = __efx_reconfigure_port(efx);
1163                 WARN_ON(rc);
1164         }
1165
1166         if (LOOPBACK_INTERNAL(efx))
1167                 link_changed = falcon_loopback_link_poll(efx);
1168         else
1169                 link_changed = efx->phy_op->poll(efx);
1170
1171         if (link_changed) {
1172                 falcon_stop_nic_stats(efx);
1173                 falcon_deconfigure_mac_wrapper(efx);
1174
1175                 falcon_switch_mac(efx);
1176                 rc = efx->mac_op->reconfigure(efx);
1177                 BUG_ON(rc);
1178
1179                 falcon_start_nic_stats(efx);
1180
1181                 efx_link_status_changed(efx);
1182         }
1183
1184         if (EFX_IS10G(efx))
1185                 falcon_poll_xmac(efx);
1186 }
1187
1188 /* Zeroes out the SRAM contents.  This routine must be called in
1189  * process context and is allowed to sleep.
1190  */
1191 static int falcon_reset_sram(struct efx_nic *efx)
1192 {
1193         efx_oword_t srm_cfg_reg_ker, gpio_cfg_reg_ker;
1194         int count;
1195
1196         /* Set the SRAM wake/sleep GPIO appropriately. */
1197         efx_reado(efx, &gpio_cfg_reg_ker, FR_AB_GPIO_CTL);
1198         EFX_SET_OWORD_FIELD(gpio_cfg_reg_ker, FRF_AB_GPIO1_OEN, 1);
1199         EFX_SET_OWORD_FIELD(gpio_cfg_reg_ker, FRF_AB_GPIO1_OUT, 1);
1200         efx_writeo(efx, &gpio_cfg_reg_ker, FR_AB_GPIO_CTL);
1201
1202         /* Initiate SRAM reset */
1203         EFX_POPULATE_OWORD_2(srm_cfg_reg_ker,
1204                              FRF_AZ_SRM_INIT_EN, 1,
1205                              FRF_AZ_SRM_NB_SZ, 0);
1206         efx_writeo(efx, &srm_cfg_reg_ker, FR_AZ_SRM_CFG);
1207
1208         /* Wait for SRAM reset to complete */
1209         count = 0;
1210         do {
1211                 EFX_LOG(efx, "waiting for SRAM reset (attempt %d)...\n", count);
1212
1213                 /* SRAM reset is slow; expect around 16ms */
1214                 schedule_timeout_uninterruptible(HZ / 50);
1215
1216                 /* Check for reset complete */
1217                 efx_reado(efx, &srm_cfg_reg_ker, FR_AZ_SRM_CFG);
1218                 if (!EFX_OWORD_FIELD(srm_cfg_reg_ker, FRF_AZ_SRM_INIT_EN)) {
1219                         EFX_LOG(efx, "SRAM reset complete\n");
1220
1221                         return 0;
1222                 }
1223         } while (++count < 20); /* wait upto 0.4 sec */
1224
1225         EFX_ERR(efx, "timed out waiting for SRAM reset\n");
1226         return -ETIMEDOUT;
1227 }
1228
1229 static int falcon_spi_device_init(struct efx_nic *efx,
1230                                   struct efx_spi_device **spi_device_ret,
1231                                   unsigned int device_id, u32 device_type)
1232 {
1233         struct efx_spi_device *spi_device;
1234
1235         if (device_type != 0) {
1236                 spi_device = kzalloc(sizeof(*spi_device), GFP_KERNEL);
1237                 if (!spi_device)
1238                         return -ENOMEM;
1239                 spi_device->device_id = device_id;
1240                 spi_device->size =
1241                         1 << SPI_DEV_TYPE_FIELD(device_type, SPI_DEV_TYPE_SIZE);
1242                 spi_device->addr_len =
1243                         SPI_DEV_TYPE_FIELD(device_type, SPI_DEV_TYPE_ADDR_LEN);
1244                 spi_device->munge_address = (spi_device->size == 1 << 9 &&
1245                                              spi_device->addr_len == 1);
1246                 spi_device->erase_command =
1247                         SPI_DEV_TYPE_FIELD(device_type, SPI_DEV_TYPE_ERASE_CMD);
1248                 spi_device->erase_size =
1249                         1 << SPI_DEV_TYPE_FIELD(device_type,
1250                                                 SPI_DEV_TYPE_ERASE_SIZE);
1251                 spi_device->block_size =
1252                         1 << SPI_DEV_TYPE_FIELD(device_type,
1253                                                 SPI_DEV_TYPE_BLOCK_SIZE);
1254         } else {
1255                 spi_device = NULL;
1256         }
1257
1258         kfree(*spi_device_ret);
1259         *spi_device_ret = spi_device;
1260         return 0;
1261 }
1262
1263 static void falcon_remove_spi_devices(struct efx_nic *efx)
1264 {
1265         kfree(efx->spi_eeprom);
1266         efx->spi_eeprom = NULL;
1267         kfree(efx->spi_flash);
1268         efx->spi_flash = NULL;
1269 }
1270
1271 /* Extract non-volatile configuration */
1272 static int falcon_probe_nvconfig(struct efx_nic *efx)
1273 {
1274         struct falcon_nvconfig *nvconfig;
1275         int board_rev;
1276         int rc;
1277
1278         nvconfig = kmalloc(sizeof(*nvconfig), GFP_KERNEL);
1279         if (!nvconfig)
1280                 return -ENOMEM;
1281
1282         rc = falcon_read_nvram(efx, nvconfig);
1283         if (rc == -EINVAL) {
1284                 EFX_ERR(efx, "NVRAM is invalid therefore using defaults\n");
1285                 efx->phy_type = PHY_TYPE_NONE;
1286                 efx->mdio.prtad = MDIO_PRTAD_NONE;
1287                 board_rev = 0;
1288                 rc = 0;
1289         } else if (rc) {
1290                 goto fail1;
1291         } else {
1292                 struct falcon_nvconfig_board_v2 *v2 = &nvconfig->board_v2;
1293                 struct falcon_nvconfig_board_v3 *v3 = &nvconfig->board_v3;
1294
1295                 efx->phy_type = v2->port0_phy_type;
1296                 efx->mdio.prtad = v2->port0_phy_addr;
1297                 board_rev = le16_to_cpu(v2->board_revision);
1298
1299                 if (le16_to_cpu(nvconfig->board_struct_ver) >= 3) {
1300                         rc = falcon_spi_device_init(
1301                                 efx, &efx->spi_flash, FFE_AB_SPI_DEVICE_FLASH,
1302                                 le32_to_cpu(v3->spi_device_type
1303                                             [FFE_AB_SPI_DEVICE_FLASH]));
1304                         if (rc)
1305                                 goto fail2;
1306                         rc = falcon_spi_device_init(
1307                                 efx, &efx->spi_eeprom, FFE_AB_SPI_DEVICE_EEPROM,
1308                                 le32_to_cpu(v3->spi_device_type
1309                                             [FFE_AB_SPI_DEVICE_EEPROM]));
1310                         if (rc)
1311                                 goto fail2;
1312                 }
1313         }
1314
1315         /* Read the MAC addresses */
1316         memcpy(efx->mac_address, nvconfig->mac_address[0], ETH_ALEN);
1317
1318         EFX_LOG(efx, "PHY is %d phy_id %d\n", efx->phy_type, efx->mdio.prtad);
1319
1320         falcon_probe_board(efx, board_rev);
1321
1322         kfree(nvconfig);
1323         return 0;
1324
1325  fail2:
1326         falcon_remove_spi_devices(efx);
1327  fail1:
1328         kfree(nvconfig);
1329         return rc;
1330 }
1331
1332 /* Probe all SPI devices on the NIC */
1333 static void falcon_probe_spi_devices(struct efx_nic *efx)
1334 {
1335         efx_oword_t nic_stat, gpio_ctl, ee_vpd_cfg;
1336         int boot_dev;
1337
1338         efx_reado(efx, &gpio_ctl, FR_AB_GPIO_CTL);
1339         efx_reado(efx, &nic_stat, FR_AB_NIC_STAT);
1340         efx_reado(efx, &ee_vpd_cfg, FR_AB_EE_VPD_CFG0);
1341
1342         if (EFX_OWORD_FIELD(gpio_ctl, FRF_AB_GPIO3_PWRUP_VALUE)) {
1343                 boot_dev = (EFX_OWORD_FIELD(nic_stat, FRF_AB_SF_PRST) ?
1344                             FFE_AB_SPI_DEVICE_FLASH : FFE_AB_SPI_DEVICE_EEPROM);
1345                 EFX_LOG(efx, "Booted from %s\n",
1346                         boot_dev == FFE_AB_SPI_DEVICE_FLASH ? "flash" : "EEPROM");
1347         } else {
1348                 /* Disable VPD and set clock dividers to safe
1349                  * values for initial programming. */
1350                 boot_dev = -1;
1351                 EFX_LOG(efx, "Booted from internal ASIC settings;"
1352                         " setting SPI config\n");
1353                 EFX_POPULATE_OWORD_3(ee_vpd_cfg, FRF_AB_EE_VPD_EN, 0,
1354                                      /* 125 MHz / 7 ~= 20 MHz */
1355                                      FRF_AB_EE_SF_CLOCK_DIV, 7,
1356                                      /* 125 MHz / 63 ~= 2 MHz */
1357                                      FRF_AB_EE_EE_CLOCK_DIV, 63);
1358                 efx_writeo(efx, &ee_vpd_cfg, FR_AB_EE_VPD_CFG0);
1359         }
1360
1361         if (boot_dev == FFE_AB_SPI_DEVICE_FLASH)
1362                 falcon_spi_device_init(efx, &efx->spi_flash,
1363                                        FFE_AB_SPI_DEVICE_FLASH,
1364                                        default_flash_type);
1365         if (boot_dev == FFE_AB_SPI_DEVICE_EEPROM)
1366                 falcon_spi_device_init(efx, &efx->spi_eeprom,
1367                                        FFE_AB_SPI_DEVICE_EEPROM,
1368                                        large_eeprom_type);
1369 }
1370
1371 static int falcon_probe_nic(struct efx_nic *efx)
1372 {
1373         struct falcon_nic_data *nic_data;
1374         struct falcon_board *board;
1375         int rc;
1376
1377         /* Allocate storage for hardware specific data */
1378         nic_data = kzalloc(sizeof(*nic_data), GFP_KERNEL);
1379         if (!nic_data)
1380                 return -ENOMEM;
1381         efx->nic_data = nic_data;
1382
1383         rc = -ENODEV;
1384
1385         if (efx_nic_fpga_ver(efx) != 0) {
1386                 EFX_ERR(efx, "Falcon FPGA not supported\n");
1387                 goto fail1;
1388         }
1389
1390         if (efx_nic_rev(efx) <= EFX_REV_FALCON_A1) {
1391                 efx_oword_t nic_stat;
1392                 struct pci_dev *dev;
1393                 u8 pci_rev = efx->pci_dev->revision;
1394
1395                 if ((pci_rev == 0xff) || (pci_rev == 0)) {
1396                         EFX_ERR(efx, "Falcon rev A0 not supported\n");
1397                         goto fail1;
1398                 }
1399                 efx_reado(efx, &nic_stat, FR_AB_NIC_STAT);
1400                 if (EFX_OWORD_FIELD(nic_stat, FRF_AB_STRAP_10G) == 0) {
1401                         EFX_ERR(efx, "Falcon rev A1 1G not supported\n");
1402                         goto fail1;
1403                 }
1404                 if (EFX_OWORD_FIELD(nic_stat, FRF_AA_STRAP_PCIE) == 0) {
1405                         EFX_ERR(efx, "Falcon rev A1 PCI-X not supported\n");
1406                         goto fail1;
1407                 }
1408
1409                 dev = pci_dev_get(efx->pci_dev);
1410                 while ((dev = pci_get_device(EFX_VENDID_SFC, FALCON_A_S_DEVID,
1411                                              dev))) {
1412                         if (dev->bus == efx->pci_dev->bus &&
1413                             dev->devfn == efx->pci_dev->devfn + 1) {
1414                                 nic_data->pci_dev2 = dev;
1415                                 break;
1416                         }
1417                 }
1418                 if (!nic_data->pci_dev2) {
1419                         EFX_ERR(efx, "failed to find secondary function\n");
1420                         rc = -ENODEV;
1421                         goto fail2;
1422                 }
1423         }
1424
1425         /* Now we can reset the NIC */
1426         rc = falcon_reset_hw(efx, RESET_TYPE_ALL);
1427         if (rc) {
1428                 EFX_ERR(efx, "failed to reset NIC\n");
1429                 goto fail3;
1430         }
1431
1432         /* Allocate memory for INT_KER */
1433         rc = efx_nic_alloc_buffer(efx, &efx->irq_status, sizeof(efx_oword_t));
1434         if (rc)
1435                 goto fail4;
1436         BUG_ON(efx->irq_status.dma_addr & 0x0f);
1437
1438         EFX_LOG(efx, "INT_KER at %llx (virt %p phys %llx)\n",
1439                 (u64)efx->irq_status.dma_addr,
1440                 efx->irq_status.addr, (u64)virt_to_phys(efx->irq_status.addr));
1441
1442         falcon_probe_spi_devices(efx);
1443
1444         /* Read in the non-volatile configuration */
1445         rc = falcon_probe_nvconfig(efx);
1446         if (rc)
1447                 goto fail5;
1448
1449         /* Initialise I2C adapter */
1450         board = falcon_board(efx);
1451         board->i2c_adap.owner = THIS_MODULE;
1452         board->i2c_data = falcon_i2c_bit_operations;
1453         board->i2c_data.data = efx;
1454         board->i2c_adap.algo_data = &board->i2c_data;
1455         board->i2c_adap.dev.parent = &efx->pci_dev->dev;
1456         strlcpy(board->i2c_adap.name, "SFC4000 GPIO",
1457                 sizeof(board->i2c_adap.name));
1458         rc = i2c_bit_add_bus(&board->i2c_adap);
1459         if (rc)
1460                 goto fail5;
1461
1462         rc = falcon_board(efx)->type->init(efx);
1463         if (rc) {
1464                 EFX_ERR(efx, "failed to initialise board\n");
1465                 goto fail6;
1466         }
1467
1468         nic_data->stats_disable_count = 1;
1469         setup_timer(&nic_data->stats_timer, &falcon_stats_timer_func,
1470                     (unsigned long)efx);
1471
1472         return 0;
1473
1474  fail6:
1475         BUG_ON(i2c_del_adapter(&board->i2c_adap));
1476         memset(&board->i2c_adap, 0, sizeof(board->i2c_adap));
1477  fail5:
1478         falcon_remove_spi_devices(efx);
1479         efx_nic_free_buffer(efx, &efx->irq_status);
1480  fail4:
1481  fail3:
1482         if (nic_data->pci_dev2) {
1483                 pci_dev_put(nic_data->pci_dev2);
1484                 nic_data->pci_dev2 = NULL;
1485         }
1486  fail2:
1487  fail1:
1488         kfree(efx->nic_data);
1489         return rc;
1490 }
1491
1492 static void falcon_init_rx_cfg(struct efx_nic *efx)
1493 {
1494         /* Prior to Siena the RX DMA engine will split each frame at
1495          * intervals of RX_USR_BUF_SIZE (32-byte units). We set it to
1496          * be so large that that never happens. */
1497         const unsigned huge_buf_size = (3 * 4096) >> 5;
1498         /* RX control FIFO thresholds (32 entries) */
1499         const unsigned ctrl_xon_thr = 20;
1500         const unsigned ctrl_xoff_thr = 25;
1501         /* RX data FIFO thresholds (256-byte units; size varies) */
1502         int data_xon_thr = efx_nic_rx_xon_thresh >> 8;
1503         int data_xoff_thr = efx_nic_rx_xoff_thresh >> 8;
1504         efx_oword_t reg;
1505
1506         efx_reado(efx, &reg, FR_AZ_RX_CFG);
1507         if (efx_nic_rev(efx) <= EFX_REV_FALCON_A1) {
1508                 /* Data FIFO size is 5.5K */
1509                 if (data_xon_thr < 0)
1510                         data_xon_thr = 512 >> 8;
1511                 if (data_xoff_thr < 0)
1512                         data_xoff_thr = 2048 >> 8;
1513                 EFX_SET_OWORD_FIELD(reg, FRF_AA_RX_DESC_PUSH_EN, 0);
1514                 EFX_SET_OWORD_FIELD(reg, FRF_AA_RX_USR_BUF_SIZE,
1515                                     huge_buf_size);
1516                 EFX_SET_OWORD_FIELD(reg, FRF_AA_RX_XON_MAC_TH, data_xon_thr);
1517                 EFX_SET_OWORD_FIELD(reg, FRF_AA_RX_XOFF_MAC_TH, data_xoff_thr);
1518                 EFX_SET_OWORD_FIELD(reg, FRF_AA_RX_XON_TX_TH, ctrl_xon_thr);
1519                 EFX_SET_OWORD_FIELD(reg, FRF_AA_RX_XOFF_TX_TH, ctrl_xoff_thr);
1520         } else {
1521                 /* Data FIFO size is 80K; register fields moved */
1522                 if (data_xon_thr < 0)
1523                         data_xon_thr = 27648 >> 8; /* ~3*max MTU */
1524                 if (data_xoff_thr < 0)
1525                         data_xoff_thr = 54272 >> 8; /* ~80Kb - 3*max MTU */
1526                 EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_DESC_PUSH_EN, 0);
1527                 EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_USR_BUF_SIZE,
1528                                     huge_buf_size);
1529                 EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_XON_MAC_TH, data_xon_thr);
1530                 EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_XOFF_MAC_TH, data_xoff_thr);
1531                 EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_XON_TX_TH, ctrl_xon_thr);
1532                 EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_XOFF_TX_TH, ctrl_xoff_thr);
1533                 EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_INGR_EN, 1);
1534         }
1535         /* Always enable XOFF signal from RX FIFO.  We enable
1536          * or disable transmission of pause frames at the MAC. */
1537         EFX_SET_OWORD_FIELD(reg, FRF_AZ_RX_XOFF_MAC_EN, 1);
1538         efx_writeo(efx, &reg, FR_AZ_RX_CFG);
1539 }
1540
1541 /* This call performs hardware-specific global initialisation, such as
1542  * defining the descriptor cache sizes and number of RSS channels.
1543  * It does not set up any buffers, descriptor rings or event queues.
1544  */
1545 static int falcon_init_nic(struct efx_nic *efx)
1546 {
1547         efx_oword_t temp;
1548         int rc;
1549
1550         /* Use on-chip SRAM */
1551         efx_reado(efx, &temp, FR_AB_NIC_STAT);
1552         EFX_SET_OWORD_FIELD(temp, FRF_AB_ONCHIP_SRAM, 1);
1553         efx_writeo(efx, &temp, FR_AB_NIC_STAT);
1554
1555         /* Set the source of the GMAC clock */
1556         if (efx_nic_rev(efx) == EFX_REV_FALCON_B0) {
1557                 efx_reado(efx, &temp, FR_AB_GPIO_CTL);
1558                 EFX_SET_OWORD_FIELD(temp, FRF_AB_USE_NIC_CLK, true);
1559                 efx_writeo(efx, &temp, FR_AB_GPIO_CTL);
1560         }
1561
1562         /* Select the correct MAC */
1563         falcon_clock_mac(efx);
1564
1565         rc = falcon_reset_sram(efx);
1566         if (rc)
1567                 return rc;
1568
1569         /* Clear the parity enables on the TX data fifos as
1570          * they produce false parity errors because of timing issues
1571          */
1572         if (EFX_WORKAROUND_5129(efx)) {
1573                 efx_reado(efx, &temp, FR_AZ_CSR_SPARE);
1574                 EFX_SET_OWORD_FIELD(temp, FRF_AB_MEM_PERR_EN_TX_DATA, 0);
1575                 efx_writeo(efx, &temp, FR_AZ_CSR_SPARE);
1576         }
1577
1578         if (EFX_WORKAROUND_7244(efx)) {
1579                 efx_reado(efx, &temp, FR_BZ_RX_FILTER_CTL);
1580                 EFX_SET_OWORD_FIELD(temp, FRF_BZ_UDP_FULL_SRCH_LIMIT, 8);
1581                 EFX_SET_OWORD_FIELD(temp, FRF_BZ_UDP_WILD_SRCH_LIMIT, 8);
1582                 EFX_SET_OWORD_FIELD(temp, FRF_BZ_TCP_FULL_SRCH_LIMIT, 8);
1583                 EFX_SET_OWORD_FIELD(temp, FRF_BZ_TCP_WILD_SRCH_LIMIT, 8);
1584                 efx_writeo(efx, &temp, FR_BZ_RX_FILTER_CTL);
1585         }
1586
1587         /* XXX This is documented only for Falcon A0/A1 */
1588         /* Setup RX.  Wait for descriptor is broken and must
1589          * be disabled.  RXDP recovery shouldn't be needed, but is.
1590          */
1591         efx_reado(efx, &temp, FR_AA_RX_SELF_RST);
1592         EFX_SET_OWORD_FIELD(temp, FRF_AA_RX_NODESC_WAIT_DIS, 1);
1593         EFX_SET_OWORD_FIELD(temp, FRF_AA_RX_SELF_RST_EN, 1);
1594         if (EFX_WORKAROUND_5583(efx))
1595                 EFX_SET_OWORD_FIELD(temp, FRF_AA_RX_ISCSI_DIS, 1);
1596         efx_writeo(efx, &temp, FR_AA_RX_SELF_RST);
1597
1598         /* Do not enable TX_NO_EOP_DISC_EN, since it limits packets to 16
1599          * descriptors (which is bad).
1600          */
1601         efx_reado(efx, &temp, FR_AZ_TX_CFG);
1602         EFX_SET_OWORD_FIELD(temp, FRF_AZ_TX_NO_EOP_DISC_EN, 0);
1603         efx_writeo(efx, &temp, FR_AZ_TX_CFG);
1604
1605         falcon_init_rx_cfg(efx);
1606
1607         /* Set destination of both TX and RX Flush events */
1608         if (efx_nic_rev(efx) >= EFX_REV_FALCON_B0) {
1609                 EFX_POPULATE_OWORD_1(temp, FRF_BZ_FLS_EVQ_ID, 0);
1610                 efx_writeo(efx, &temp, FR_BZ_DP_CTRL);
1611         }
1612
1613         efx_nic_init_common(efx);
1614
1615         return 0;
1616 }
1617
1618 static void falcon_remove_nic(struct efx_nic *efx)
1619 {
1620         struct falcon_nic_data *nic_data = efx->nic_data;
1621         struct falcon_board *board = falcon_board(efx);
1622         int rc;
1623
1624         board->type->fini(efx);
1625
1626         /* Remove I2C adapter and clear it in preparation for a retry */
1627         rc = i2c_del_adapter(&board->i2c_adap);
1628         BUG_ON(rc);
1629         memset(&board->i2c_adap, 0, sizeof(board->i2c_adap));
1630
1631         falcon_remove_spi_devices(efx);
1632         efx_nic_free_buffer(efx, &efx->irq_status);
1633
1634         falcon_reset_hw(efx, RESET_TYPE_ALL);
1635
1636         /* Release the second function after the reset */
1637         if (nic_data->pci_dev2) {
1638                 pci_dev_put(nic_data->pci_dev2);
1639                 nic_data->pci_dev2 = NULL;
1640         }
1641
1642         /* Tear down the private nic state */
1643         kfree(efx->nic_data);
1644         efx->nic_data = NULL;
1645 }
1646
1647 static void falcon_update_nic_stats(struct efx_nic *efx)
1648 {
1649         struct falcon_nic_data *nic_data = efx->nic_data;
1650         efx_oword_t cnt;
1651
1652         if (nic_data->stats_disable_count)
1653                 return;
1654
1655         efx_reado(efx, &cnt, FR_AZ_RX_NODESC_DROP);
1656         efx->n_rx_nodesc_drop_cnt +=
1657                 EFX_OWORD_FIELD(cnt, FRF_AB_RX_NODESC_DROP_CNT);
1658
1659         if (nic_data->stats_pending &&
1660             *nic_data->stats_dma_done == FALCON_STATS_DONE) {
1661                 nic_data->stats_pending = false;
1662                 rmb(); /* read the done flag before the stats */
1663                 efx->mac_op->update_stats(efx);
1664         }
1665 }
1666
1667 void falcon_start_nic_stats(struct efx_nic *efx)
1668 {
1669         struct falcon_nic_data *nic_data = efx->nic_data;
1670
1671         spin_lock_bh(&efx->stats_lock);
1672         if (--nic_data->stats_disable_count == 0)
1673                 falcon_stats_request(efx);
1674         spin_unlock_bh(&efx->stats_lock);
1675 }
1676
1677 void falcon_stop_nic_stats(struct efx_nic *efx)
1678 {
1679         struct falcon_nic_data *nic_data = efx->nic_data;
1680         int i;
1681
1682         might_sleep();
1683
1684         spin_lock_bh(&efx->stats_lock);
1685         ++nic_data->stats_disable_count;
1686         spin_unlock_bh(&efx->stats_lock);
1687
1688         del_timer_sync(&nic_data->stats_timer);
1689
1690         /* Wait enough time for the most recent transfer to
1691          * complete. */
1692         for (i = 0; i < 4 && nic_data->stats_pending; i++) {
1693                 if (*nic_data->stats_dma_done == FALCON_STATS_DONE)
1694                         break;
1695                 msleep(1);
1696         }
1697
1698         spin_lock_bh(&efx->stats_lock);
1699         falcon_stats_complete(efx);
1700         spin_unlock_bh(&efx->stats_lock);
1701 }
1702
1703 static void falcon_set_id_led(struct efx_nic *efx, enum efx_led_mode mode)
1704 {
1705         falcon_board(efx)->type->set_id_led(efx, mode);
1706 }
1707
1708 /**************************************************************************
1709  *
1710  * Wake on LAN
1711  *
1712  **************************************************************************
1713  */
1714
1715 static void falcon_get_wol(struct efx_nic *efx, struct ethtool_wolinfo *wol)
1716 {
1717         wol->supported = 0;
1718         wol->wolopts = 0;
1719         memset(&wol->sopass, 0, sizeof(wol->sopass));
1720 }
1721
1722 static int falcon_set_wol(struct efx_nic *efx, u32 type)
1723 {
1724         if (type != 0)
1725                 return -EINVAL;
1726         return 0;
1727 }
1728
1729 /**************************************************************************
1730  *
1731  * Revision-dependent attributes used by efx.c
1732  *
1733  **************************************************************************
1734  */
1735
1736 struct efx_nic_type falcon_a1_nic_type = {
1737         .probe = falcon_probe_nic,
1738         .remove = falcon_remove_nic,
1739         .init = falcon_init_nic,
1740         .fini = efx_port_dummy_op_void,
1741         .monitor = falcon_monitor,
1742         .reset = falcon_reset_hw,
1743         .probe_port = falcon_probe_port,
1744         .remove_port = falcon_remove_port,
1745         .prepare_flush = falcon_prepare_flush,
1746         .update_stats = falcon_update_nic_stats,
1747         .start_stats = falcon_start_nic_stats,
1748         .stop_stats = falcon_stop_nic_stats,
1749         .set_id_led = falcon_set_id_led,
1750         .push_irq_moderation = falcon_push_irq_moderation,
1751         .push_multicast_hash = falcon_push_multicast_hash,
1752         .reconfigure_port = falcon_reconfigure_port,
1753         .get_wol = falcon_get_wol,
1754         .set_wol = falcon_set_wol,
1755         .resume_wol = efx_port_dummy_op_void,
1756         .test_nvram = falcon_test_nvram,
1757         .default_mac_ops = &falcon_xmac_operations,
1758
1759         .revision = EFX_REV_FALCON_A1,
1760         .mem_map_size = 0x20000,
1761         .txd_ptr_tbl_base = FR_AA_TX_DESC_PTR_TBL_KER,
1762         .rxd_ptr_tbl_base = FR_AA_RX_DESC_PTR_TBL_KER,
1763         .buf_tbl_base = FR_AA_BUF_FULL_TBL_KER,
1764         .evq_ptr_tbl_base = FR_AA_EVQ_PTR_TBL_KER,
1765         .evq_rptr_tbl_base = FR_AA_EVQ_RPTR_KER,
1766         .max_dma_mask = DMA_BIT_MASK(FSF_AZ_TX_KER_BUF_ADDR_WIDTH),
1767         .rx_buffer_padding = 0x24,
1768         .max_interrupt_mode = EFX_INT_MODE_MSI,
1769         .phys_addr_channels = 4,
1770         .tx_dc_base = 0x130000,
1771         .rx_dc_base = 0x100000,
1772         .offload_features = NETIF_F_IP_CSUM,
1773         .reset_world_flags = ETH_RESET_IRQ,
1774 };
1775
1776 struct efx_nic_type falcon_b0_nic_type = {
1777         .probe = falcon_probe_nic,
1778         .remove = falcon_remove_nic,
1779         .init = falcon_init_nic,
1780         .fini = efx_port_dummy_op_void,
1781         .monitor = falcon_monitor,
1782         .reset = falcon_reset_hw,
1783         .probe_port = falcon_probe_port,
1784         .remove_port = falcon_remove_port,
1785         .prepare_flush = falcon_prepare_flush,
1786         .update_stats = falcon_update_nic_stats,
1787         .start_stats = falcon_start_nic_stats,
1788         .stop_stats = falcon_stop_nic_stats,
1789         .set_id_led = falcon_set_id_led,
1790         .push_irq_moderation = falcon_push_irq_moderation,
1791         .push_multicast_hash = falcon_push_multicast_hash,
1792         .reconfigure_port = falcon_reconfigure_port,
1793         .get_wol = falcon_get_wol,
1794         .set_wol = falcon_set_wol,
1795         .resume_wol = efx_port_dummy_op_void,
1796         .test_registers = falcon_b0_test_registers,
1797         .test_nvram = falcon_test_nvram,
1798         .default_mac_ops = &falcon_xmac_operations,
1799
1800         .revision = EFX_REV_FALCON_B0,
1801         /* Map everything up to and including the RSS indirection
1802          * table.  Don't map MSI-X table, MSI-X PBA since Linux
1803          * requires that they not be mapped.  */
1804         .mem_map_size = (FR_BZ_RX_INDIRECTION_TBL +
1805                          FR_BZ_RX_INDIRECTION_TBL_STEP *
1806                          FR_BZ_RX_INDIRECTION_TBL_ROWS),
1807         .txd_ptr_tbl_base = FR_BZ_TX_DESC_PTR_TBL,
1808         .rxd_ptr_tbl_base = FR_BZ_RX_DESC_PTR_TBL,
1809         .buf_tbl_base = FR_BZ_BUF_FULL_TBL,
1810         .evq_ptr_tbl_base = FR_BZ_EVQ_PTR_TBL,
1811         .evq_rptr_tbl_base = FR_BZ_EVQ_RPTR,
1812         .max_dma_mask = DMA_BIT_MASK(FSF_AZ_TX_KER_BUF_ADDR_WIDTH),
1813         .rx_buffer_padding = 0,
1814         .max_interrupt_mode = EFX_INT_MODE_MSIX,
1815         .phys_addr_channels = 32, /* Hardware limit is 64, but the legacy
1816                                    * interrupt handler only supports 32
1817                                    * channels */
1818         .tx_dc_base = 0x130000,
1819         .rx_dc_base = 0x100000,
1820         .offload_features = NETIF_F_IP_CSUM,
1821         .reset_world_flags = ETH_RESET_IRQ,
1822 };
1823