1 /****************************************************************************
2 * Driver for Solarflare Solarstorm network controllers and boards
3 * Copyright 2005-2006 Fen Systems Ltd.
4 * Copyright 2006-2009 Solarflare Communications Inc.
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.
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"
28 #include "workarounds.h"
30 /* Hardware control for SFC4000 (aka Falcon). */
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));
46 /**************************************************************************
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
52 **************************************************************************
54 static void falcon_setsda(void *data, int state)
56 struct efx_nic *efx = (struct efx_nic *)data;
59 efx_reado(efx, ®, FR_AB_GPIO_CTL);
60 EFX_SET_OWORD_FIELD(reg, FRF_AB_GPIO3_OEN, !state);
61 efx_writeo(efx, ®, FR_AB_GPIO_CTL);
64 static void falcon_setscl(void *data, int state)
66 struct efx_nic *efx = (struct efx_nic *)data;
69 efx_reado(efx, ®, FR_AB_GPIO_CTL);
70 EFX_SET_OWORD_FIELD(reg, FRF_AB_GPIO0_OEN, !state);
71 efx_writeo(efx, ®, FR_AB_GPIO_CTL);
74 static int falcon_getsda(void *data)
76 struct efx_nic *efx = (struct efx_nic *)data;
79 efx_reado(efx, ®, FR_AB_GPIO_CTL);
80 return EFX_OWORD_FIELD(reg, FRF_AB_GPIO3_IN);
83 static int falcon_getscl(void *data)
85 struct efx_nic *efx = (struct efx_nic *)data;
88 efx_reado(efx, ®, FR_AB_GPIO_CTL);
89 return EFX_OWORD_FIELD(reg, FRF_AB_GPIO0_IN);
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,
98 /* Wait up to 50 ms for slave to let us pull SCL high */
99 .timeout = DIV_ROUND_UP(HZ, 20),
102 static void falcon_push_irq_moderation(struct efx_channel *channel)
104 efx_dword_t timer_cmd;
105 struct efx_nic *efx = channel->efx;
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,
113 channel->irq_moderation - 1);
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);
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,
125 static void falcon_deconfigure_mac_wrapper(struct efx_nic *efx);
127 static void falcon_prepare_flush(struct efx_nic *efx)
129 falcon_deconfigure_mac_wrapper(efx);
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. */
137 /* Acknowledge a legacy interrupt from Falcon
139 * This acknowledges a legacy (not MSI) interrupt via INT_ACK_KER_REG.
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)
145 * NB most hardware supports MSI interrupts
147 inline void falcon_irq_ack_a1(struct efx_nic *efx)
151 EFX_POPULATE_DWORD_1(reg, FRF_AA_INT_ACK_KER_FIELD, 0xb7eb7e);
152 efx_writed(efx, ®, FR_AA_INT_ACK_KER);
153 efx_readd(efx, ®, FR_AA_WORK_AROUND_BROKEN_PCI_READS);
157 irqreturn_t falcon_legacy_interrupt_a1(int irq, void *dev_id)
159 struct efx_nic *efx = dev_id;
160 efx_oword_t *int_ker = efx->irq_status.addr;
164 /* Check to see if this is our interrupt. If it isn't, we
165 * exit without having touched the hardware.
167 if (unlikely(EFX_OWORD_IS_ZERO(*int_ker))) {
168 netif_vdbg(efx, intr, efx->net_dev,
169 "IRQ %d on CPU %d not for me\n", irq,
170 raw_smp_processor_id());
173 efx->last_irq_cpu = raw_smp_processor_id();
174 netif_vdbg(efx, intr, efx->net_dev,
175 "IRQ %d on CPU %d status " EFX_OWORD_FMT "\n",
176 irq, raw_smp_processor_id(), EFX_OWORD_VAL(*int_ker));
178 /* Determine interrupting queues, clear interrupt status
179 * register and acknowledge the device interrupt.
181 BUILD_BUG_ON(FSF_AZ_NET_IVEC_INT_Q_WIDTH > EFX_MAX_CHANNELS);
182 queues = EFX_OWORD_FIELD(*int_ker, FSF_AZ_NET_IVEC_INT_Q);
184 /* Check to see if we have a serious error condition */
185 if (queues & (1U << efx->fatal_irq_level)) {
186 syserr = EFX_OWORD_FIELD(*int_ker, FSF_AZ_NET_IVEC_FATAL_INT);
187 if (unlikely(syserr))
188 return efx_nic_fatal_interrupt(efx);
191 EFX_ZERO_OWORD(*int_ker);
192 wmb(); /* Ensure the vector is cleared before interrupt ack */
193 falcon_irq_ack_a1(efx);
196 efx_schedule_channel(efx_get_channel(efx, 0));
198 efx_schedule_channel(efx_get_channel(efx, 1));
201 /**************************************************************************
205 **************************************************************************
208 #define FALCON_SPI_MAX_LEN sizeof(efx_oword_t)
210 static int falcon_spi_poll(struct efx_nic *efx)
213 efx_reado(efx, ®, FR_AB_EE_SPI_HCMD);
214 return EFX_OWORD_FIELD(reg, FRF_AB_EE_SPI_HCMD_CMD_EN) ? -EBUSY : 0;
217 /* Wait for SPI command completion */
218 static int falcon_spi_wait(struct efx_nic *efx)
220 /* Most commands will finish quickly, so we start polling at
221 * very short intervals. Sometimes the command may have to
222 * wait for VPD or expansion ROM access outside of our
223 * control, so we allow up to 100 ms. */
224 unsigned long timeout = jiffies + 1 + DIV_ROUND_UP(HZ, 10);
227 for (i = 0; i < 10; i++) {
228 if (!falcon_spi_poll(efx))
234 if (!falcon_spi_poll(efx))
236 if (time_after_eq(jiffies, timeout)) {
237 netif_err(efx, hw, efx->net_dev,
238 "timed out waiting for SPI\n");
241 schedule_timeout_uninterruptible(1);
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)
249 bool addressed = (address >= 0);
250 bool reading = (out != NULL);
254 /* Input validation */
255 if (len > FALCON_SPI_MAX_LEN)
258 /* Check that previous command is not still running */
259 rc = falcon_spi_poll(efx);
263 /* Program address register, if we have an address */
265 EFX_POPULATE_OWORD_1(reg, FRF_AB_EE_SPI_HADR_ADR, address);
266 efx_writeo(efx, ®, FR_AB_EE_SPI_HADR);
269 /* Program data register, if we have data */
271 memcpy(®, in, len);
272 efx_writeo(efx, ®, FR_AB_EE_SPI_HDATA);
275 /* Issue read/write command */
276 EFX_POPULATE_OWORD_7(reg,
277 FRF_AB_EE_SPI_HCMD_CMD_EN, 1,
278 FRF_AB_EE_SPI_HCMD_SF_SEL, spi->device_id,
279 FRF_AB_EE_SPI_HCMD_DABCNT, len,
280 FRF_AB_EE_SPI_HCMD_READ, reading,
281 FRF_AB_EE_SPI_HCMD_DUBCNT, 0,
282 FRF_AB_EE_SPI_HCMD_ADBCNT,
283 (addressed ? spi->addr_len : 0),
284 FRF_AB_EE_SPI_HCMD_ENC, command);
285 efx_writeo(efx, ®, FR_AB_EE_SPI_HCMD);
287 /* Wait for read/write to complete */
288 rc = falcon_spi_wait(efx);
294 efx_reado(efx, ®, FR_AB_EE_SPI_HDATA);
295 memcpy(out, ®, len);
302 falcon_spi_write_limit(const struct efx_spi_device *spi, size_t start)
304 return min(FALCON_SPI_MAX_LEN,
305 (spi->block_size - (start & (spi->block_size - 1))));
309 efx_spi_munge_command(const struct efx_spi_device *spi,
310 const u8 command, const unsigned int address)
312 return command | (((address >> 8) & spi->munge_address) << 3);
315 /* Wait up to 10 ms for buffered write completion */
317 falcon_spi_wait_write(struct efx_nic *efx, const struct efx_spi_device *spi)
319 unsigned long timeout = jiffies + 1 + DIV_ROUND_UP(HZ, 100);
324 rc = falcon_spi_cmd(efx, spi, SPI_RDSR, -1, NULL,
325 &status, sizeof(status));
328 if (!(status & SPI_STATUS_NRDY))
330 if (time_after_eq(jiffies, timeout)) {
331 netif_err(efx, hw, efx->net_dev,
332 "SPI write timeout on device %d"
333 " last status=0x%02x\n",
334 spi->device_id, status);
337 schedule_timeout_uninterruptible(1);
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)
344 size_t block_len, pos = 0;
345 unsigned int command;
349 block_len = min(len - pos, FALCON_SPI_MAX_LEN);
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);
358 /* Avoid locking up the system */
360 if (signal_pending(current)) {
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)
375 u8 verify_buffer[FALCON_SPI_MAX_LEN];
376 size_t block_len, pos = 0;
377 unsigned int command;
381 rc = falcon_spi_cmd(efx, spi, SPI_WREN, -1, NULL, NULL, 0);
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);
393 rc = falcon_spi_wait_write(efx, spi);
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)) {
407 /* Avoid locking up the system */
409 if (signal_pending(current)) {
420 /**************************************************************************
424 **************************************************************************
427 static void falcon_push_multicast_hash(struct efx_nic *efx)
429 union efx_multicast_hash *mc_hash = &efx->multicast_hash;
431 WARN_ON(!mutex_is_locked(&efx->mac_lock));
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);
437 static void falcon_reset_macs(struct efx_nic *efx)
439 struct falcon_nic_data *nic_data = efx->nic_data;
440 efx_oword_t reg, mac_ctrl;
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
447 EFX_POPULATE_OWORD_1(reg, FRF_AB_XM_CORE_RST, 1);
448 efx_writeo(efx, ®, FR_AB_XM_GLB_CFG);
450 for (count = 0; count < 10000; count++) {
451 efx_reado(efx, ®, FR_AB_XM_GLB_CFG);
452 if (EFX_OWORD_FIELD(reg, FRF_AB_XM_CORE_RST) ==
458 netif_err(efx, hw, efx->net_dev,
459 "timed out waiting for XMAC core reset\n");
462 /* Mac stats will fail whist the TX fifo is draining */
463 WARN_ON(nic_data->stats_disable_count == 0);
465 efx_reado(efx, &mac_ctrl, FR_AB_MAC_CTRL);
466 EFX_SET_OWORD_FIELD(mac_ctrl, FRF_BB_TXFIFO_DRAIN_EN, 1);
467 efx_writeo(efx, &mac_ctrl, FR_AB_MAC_CTRL);
469 efx_reado(efx, ®, FR_AB_GLB_CTL);
470 EFX_SET_OWORD_FIELD(reg, FRF_AB_RST_XGTX, 1);
471 EFX_SET_OWORD_FIELD(reg, FRF_AB_RST_XGRX, 1);
472 EFX_SET_OWORD_FIELD(reg, FRF_AB_RST_EM, 1);
473 efx_writeo(efx, ®, FR_AB_GLB_CTL);
477 efx_reado(efx, ®, FR_AB_GLB_CTL);
478 if (!EFX_OWORD_FIELD(reg, FRF_AB_RST_XGTX) &&
479 !EFX_OWORD_FIELD(reg, FRF_AB_RST_XGRX) &&
480 !EFX_OWORD_FIELD(reg, FRF_AB_RST_EM)) {
481 netif_dbg(efx, hw, efx->net_dev,
482 "Completed MAC reset after %d loops\n",
487 netif_err(efx, hw, efx->net_dev, "MAC reset failed\n");
494 /* Ensure the correct MAC is selected before statistics
495 * are re-enabled by the caller */
496 efx_writeo(efx, &mac_ctrl, FR_AB_MAC_CTRL);
498 falcon_setup_xaui(efx);
501 void falcon_drain_tx_fifo(struct efx_nic *efx)
505 if ((efx_nic_rev(efx) < EFX_REV_FALCON_B0) ||
506 (efx->loopback_mode != LOOPBACK_NONE))
509 efx_reado(efx, ®, FR_AB_MAC_CTRL);
510 /* There is no point in draining more than once */
511 if (EFX_OWORD_FIELD(reg, FRF_BB_TXFIFO_DRAIN_EN))
514 falcon_reset_macs(efx);
517 static void falcon_deconfigure_mac_wrapper(struct efx_nic *efx)
521 if (efx_nic_rev(efx) < EFX_REV_FALCON_B0)
524 /* Isolate the MAC -> RX */
525 efx_reado(efx, ®, FR_AZ_RX_CFG);
526 EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_INGR_EN, 0);
527 efx_writeo(efx, ®, FR_AZ_RX_CFG);
529 /* Isolate TX -> MAC */
530 falcon_drain_tx_fifo(efx);
533 void falcon_reconfigure_mac_wrapper(struct efx_nic *efx)
535 struct efx_link_state *link_state = &efx->link_state;
537 int link_speed, isolate;
539 isolate = (efx->reset_pending != RESET_TYPE_NONE);
541 switch (link_state->speed) {
542 case 10000: link_speed = 3; break;
543 case 1000: link_speed = 2; break;
544 case 100: link_speed = 1; break;
545 default: link_speed = 0; break;
547 /* MAC_LINK_STATUS controls MAC backpressure but doesn't work
548 * as advertised. Disable to ensure packets are not
549 * indefinitely held and TX queue can be flushed at any point
550 * while the link is down. */
551 EFX_POPULATE_OWORD_5(reg,
552 FRF_AB_MAC_XOFF_VAL, 0xffff /* max pause time */,
553 FRF_AB_MAC_BCAD_ACPT, 1,
554 FRF_AB_MAC_UC_PROM, efx->promiscuous,
555 FRF_AB_MAC_LINK_STATUS, 1, /* always set */
556 FRF_AB_MAC_SPEED, link_speed);
557 /* On B0, MAC backpressure can be disabled and packets get
559 if (efx_nic_rev(efx) >= EFX_REV_FALCON_B0) {
560 EFX_SET_OWORD_FIELD(reg, FRF_BB_TXFIFO_DRAIN_EN,
561 !link_state->up || isolate);
564 efx_writeo(efx, ®, FR_AB_MAC_CTRL);
566 /* Restore the multicast hash registers. */
567 falcon_push_multicast_hash(efx);
569 efx_reado(efx, ®, FR_AZ_RX_CFG);
570 /* Enable XOFF signal from RX FIFO (we enabled it during NIC
571 * initialisation but it may read back as 0) */
572 EFX_SET_OWORD_FIELD(reg, FRF_AZ_RX_XOFF_MAC_EN, 1);
573 /* Unisolate the MAC -> RX */
574 if (efx_nic_rev(efx) >= EFX_REV_FALCON_B0)
575 EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_INGR_EN, !isolate);
576 efx_writeo(efx, ®, FR_AZ_RX_CFG);
579 static void falcon_stats_request(struct efx_nic *efx)
581 struct falcon_nic_data *nic_data = efx->nic_data;
584 WARN_ON(nic_data->stats_pending);
585 WARN_ON(nic_data->stats_disable_count);
587 if (nic_data->stats_dma_done == NULL)
588 return; /* no mac selected */
590 *nic_data->stats_dma_done = FALCON_STATS_NOT_DONE;
591 nic_data->stats_pending = true;
592 wmb(); /* ensure done flag is clear */
594 /* Initiate DMA transfer of stats */
595 EFX_POPULATE_OWORD_2(reg,
596 FRF_AB_MAC_STAT_DMA_CMD, 1,
597 FRF_AB_MAC_STAT_DMA_ADR,
598 efx->stats_buffer.dma_addr);
599 efx_writeo(efx, ®, FR_AB_MAC_STAT_DMA);
601 mod_timer(&nic_data->stats_timer, round_jiffies_up(jiffies + HZ / 2));
604 static void falcon_stats_complete(struct efx_nic *efx)
606 struct falcon_nic_data *nic_data = efx->nic_data;
608 if (!nic_data->stats_pending)
611 nic_data->stats_pending = 0;
612 if (*nic_data->stats_dma_done == FALCON_STATS_DONE) {
613 rmb(); /* read the done flag before the stats */
614 efx->mac_op->update_stats(efx);
616 netif_err(efx, hw, efx->net_dev,
617 "timed out waiting for statistics\n");
621 static void falcon_stats_timer_func(unsigned long context)
623 struct efx_nic *efx = (struct efx_nic *)context;
624 struct falcon_nic_data *nic_data = efx->nic_data;
626 spin_lock(&efx->stats_lock);
628 falcon_stats_complete(efx);
629 if (nic_data->stats_disable_count == 0)
630 falcon_stats_request(efx);
632 spin_unlock(&efx->stats_lock);
635 static bool falcon_loopback_link_poll(struct efx_nic *efx)
637 struct efx_link_state old_state = efx->link_state;
639 WARN_ON(!mutex_is_locked(&efx->mac_lock));
640 WARN_ON(!LOOPBACK_INTERNAL(efx));
642 efx->link_state.fd = true;
643 efx->link_state.fc = efx->wanted_fc;
644 efx->link_state.up = true;
645 efx->link_state.speed = 10000;
647 return !efx_link_state_equal(&efx->link_state, &old_state);
650 static int falcon_reconfigure_port(struct efx_nic *efx)
654 WARN_ON(efx_nic_rev(efx) > EFX_REV_FALCON_B0);
656 /* Poll the PHY link state *before* reconfiguring it. This means we
657 * will pick up the correct speed (in loopback) to select the correct
660 if (LOOPBACK_INTERNAL(efx))
661 falcon_loopback_link_poll(efx);
663 efx->phy_op->poll(efx);
665 falcon_stop_nic_stats(efx);
666 falcon_deconfigure_mac_wrapper(efx);
668 falcon_reset_macs(efx);
670 efx->phy_op->reconfigure(efx);
671 rc = efx->mac_op->reconfigure(efx);
674 falcon_start_nic_stats(efx);
676 /* Synchronise efx->link_state with the kernel */
677 efx_link_status_changed(efx);
682 /**************************************************************************
684 * PHY access via GMII
686 **************************************************************************
689 /* Wait for GMII access to complete */
690 static int falcon_gmii_wait(struct efx_nic *efx)
695 /* wait upto 50ms - taken max from datasheet */
696 for (count = 0; count < 5000; count++) {
697 efx_reado(efx, &md_stat, FR_AB_MD_STAT);
698 if (EFX_OWORD_FIELD(md_stat, FRF_AB_MD_BSY) == 0) {
699 if (EFX_OWORD_FIELD(md_stat, FRF_AB_MD_LNFL) != 0 ||
700 EFX_OWORD_FIELD(md_stat, FRF_AB_MD_BSERR) != 0) {
701 netif_err(efx, hw, efx->net_dev,
702 "error from GMII access "
704 EFX_OWORD_VAL(md_stat));
711 netif_err(efx, hw, efx->net_dev, "timed out waiting for GMII\n");
715 /* Write an MDIO register of a PHY connected to Falcon. */
716 static int falcon_mdio_write(struct net_device *net_dev,
717 int prtad, int devad, u16 addr, u16 value)
719 struct efx_nic *efx = netdev_priv(net_dev);
720 struct falcon_nic_data *nic_data = efx->nic_data;
724 netif_vdbg(efx, hw, efx->net_dev,
725 "writing MDIO %d register %d.%d with 0x%04x\n",
726 prtad, devad, addr, value);
728 mutex_lock(&nic_data->mdio_lock);
730 /* Check MDIO not currently being accessed */
731 rc = falcon_gmii_wait(efx);
735 /* Write the address/ID register */
736 EFX_POPULATE_OWORD_1(reg, FRF_AB_MD_PHY_ADR, addr);
737 efx_writeo(efx, ®, FR_AB_MD_PHY_ADR);
739 EFX_POPULATE_OWORD_2(reg, FRF_AB_MD_PRT_ADR, prtad,
740 FRF_AB_MD_DEV_ADR, devad);
741 efx_writeo(efx, ®, FR_AB_MD_ID);
744 EFX_POPULATE_OWORD_1(reg, FRF_AB_MD_TXD, value);
745 efx_writeo(efx, ®, FR_AB_MD_TXD);
747 EFX_POPULATE_OWORD_2(reg,
750 efx_writeo(efx, ®, FR_AB_MD_CS);
752 /* Wait for data to be written */
753 rc = falcon_gmii_wait(efx);
755 /* Abort the write operation */
756 EFX_POPULATE_OWORD_2(reg,
759 efx_writeo(efx, ®, FR_AB_MD_CS);
764 mutex_unlock(&nic_data->mdio_lock);
768 /* Read an MDIO register of a PHY connected to Falcon. */
769 static int falcon_mdio_read(struct net_device *net_dev,
770 int prtad, int devad, u16 addr)
772 struct efx_nic *efx = netdev_priv(net_dev);
773 struct falcon_nic_data *nic_data = efx->nic_data;
777 mutex_lock(&nic_data->mdio_lock);
779 /* Check MDIO not currently being accessed */
780 rc = falcon_gmii_wait(efx);
784 EFX_POPULATE_OWORD_1(reg, FRF_AB_MD_PHY_ADR, addr);
785 efx_writeo(efx, ®, FR_AB_MD_PHY_ADR);
787 EFX_POPULATE_OWORD_2(reg, FRF_AB_MD_PRT_ADR, prtad,
788 FRF_AB_MD_DEV_ADR, devad);
789 efx_writeo(efx, ®, FR_AB_MD_ID);
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, ®, FR_AB_MD_CS);
795 /* Wait for data to become available */
796 rc = falcon_gmii_wait(efx);
798 efx_reado(efx, ®, 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);
804 /* Abort the read operation */
805 EFX_POPULATE_OWORD_2(reg,
808 efx_writeo(efx, ®, FR_AB_MD_CS);
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);
816 mutex_unlock(&nic_data->mdio_lock);
820 /* This call is responsible for hooking in the MAC and PHY operations */
821 static int falcon_probe_port(struct efx_nic *efx)
823 struct falcon_nic_data *nic_data = efx->nic_data;
826 switch (efx->phy_type) {
827 case PHY_TYPE_SFX7101:
828 efx->phy_op = &falcon_sfx7101_phy_ops;
830 case PHY_TYPE_QT2022C2:
831 case PHY_TYPE_QT2025C:
832 efx->phy_op = &falcon_qt202x_phy_ops;
834 case PHY_TYPE_TXC43128:
835 efx->phy_op = &falcon_txc_phy_ops;
838 netif_err(efx, probe, efx->net_dev, "Unknown PHY type %d\n",
843 /* Fill out MDIO structure and loopback modes */
844 mutex_init(&nic_data->mdio_lock);
845 efx->mdio.mdio_read = falcon_mdio_read;
846 efx->mdio.mdio_write = falcon_mdio_write;
847 rc = efx->phy_op->probe(efx);
851 /* Initial assumption */
852 efx->link_state.speed = 10000;
853 efx->link_state.fd = true;
855 /* Hardware flow ctrl. FalconA RX FIFO too small for pause generation */
856 if (efx_nic_rev(efx) >= EFX_REV_FALCON_B0)
857 efx->wanted_fc = EFX_FC_RX | EFX_FC_TX;
859 efx->wanted_fc = EFX_FC_RX;
860 if (efx->mdio.mmds & MDIO_DEVS_AN)
861 efx->wanted_fc |= EFX_FC_AUTO;
863 /* Allocate buffer for stats */
864 rc = efx_nic_alloc_buffer(efx, &efx->stats_buffer,
865 FALCON_MAC_STATS_SIZE);
868 netif_dbg(efx, probe, efx->net_dev,
869 "stats buffer at %llx (virt %p phys %llx)\n",
870 (u64)efx->stats_buffer.dma_addr,
871 efx->stats_buffer.addr,
872 (u64)virt_to_phys(efx->stats_buffer.addr));
873 nic_data->stats_dma_done = efx->stats_buffer.addr + XgDmaDone_offset;
878 static void falcon_remove_port(struct efx_nic *efx)
880 efx->phy_op->remove(efx);
881 efx_nic_free_buffer(efx, &efx->stats_buffer);
884 /* Global events are basically PHY events */
886 falcon_handle_global_event(struct efx_channel *channel, efx_qword_t *event)
888 struct efx_nic *efx = channel->efx;
890 if (EFX_QWORD_FIELD(*event, FSF_AB_GLB_EV_G_PHY0_INTR) ||
891 EFX_QWORD_FIELD(*event, FSF_AB_GLB_EV_XG_PHY0_INTR) ||
892 EFX_QWORD_FIELD(*event, FSF_AB_GLB_EV_XFP_PHY0_INTR))
896 if ((efx_nic_rev(efx) == EFX_REV_FALCON_B0) &&
897 EFX_QWORD_FIELD(*event, FSF_BB_GLB_EV_XG_MGT_INTR)) {
898 efx->xmac_poll_required = true;
902 if (efx_nic_rev(efx) <= EFX_REV_FALCON_A1 ?
903 EFX_QWORD_FIELD(*event, FSF_AA_GLB_EV_RX_RECOVERY) :
904 EFX_QWORD_FIELD(*event, FSF_BB_GLB_EV_RX_RECOVERY)) {
905 netif_err(efx, rx_err, efx->net_dev,
906 "channel %d seen global RX_RESET event. Resetting.\n",
909 atomic_inc(&efx->rx_reset);
910 efx_schedule_reset(efx, EFX_WORKAROUND_6555(efx) ?
911 RESET_TYPE_RX_RECOVERY : RESET_TYPE_DISABLE);
918 /**************************************************************************
922 **************************************************************************/
925 falcon_read_nvram(struct efx_nic *efx, struct falcon_nvconfig *nvconfig_out)
927 struct falcon_nic_data *nic_data = efx->nic_data;
928 struct falcon_nvconfig *nvconfig;
929 struct efx_spi_device *spi;
931 int rc, magic_num, struct_ver;
932 __le16 *word, *limit;
935 if (efx_spi_present(&nic_data->spi_flash))
936 spi = &nic_data->spi_flash;
937 else if (efx_spi_present(&nic_data->spi_eeprom))
938 spi = &nic_data->spi_eeprom;
942 region = kmalloc(FALCON_NVCONFIG_END, GFP_KERNEL);
945 nvconfig = region + FALCON_NVCONFIG_OFFSET;
947 mutex_lock(&nic_data->spi_lock);
948 rc = falcon_spi_read(efx, spi, 0, FALCON_NVCONFIG_END, NULL, region);
949 mutex_unlock(&nic_data->spi_lock);
951 netif_err(efx, hw, efx->net_dev, "Failed to read %s\n",
952 efx_spi_present(&nic_data->spi_flash) ?
958 magic_num = le16_to_cpu(nvconfig->board_magic_num);
959 struct_ver = le16_to_cpu(nvconfig->board_struct_ver);
962 if (magic_num != FALCON_NVCONFIG_BOARD_MAGIC_NUM) {
963 netif_err(efx, hw, efx->net_dev,
964 "NVRAM bad magic 0x%x\n", magic_num);
967 if (struct_ver < 2) {
968 netif_err(efx, hw, efx->net_dev,
969 "NVRAM has ancient version 0x%x\n", struct_ver);
971 } else if (struct_ver < 4) {
972 word = &nvconfig->board_magic_num;
973 limit = (__le16 *) (nvconfig + 1);
976 limit = region + FALCON_NVCONFIG_END;
978 for (csum = 0; word < limit; ++word)
979 csum += le16_to_cpu(*word);
981 if (~csum & 0xffff) {
982 netif_err(efx, hw, efx->net_dev,
983 "NVRAM has incorrect checksum\n");
989 memcpy(nvconfig_out, nvconfig, sizeof(*nvconfig));
996 static int falcon_test_nvram(struct efx_nic *efx)
998 return falcon_read_nvram(efx, NULL);
1001 static const struct efx_nic_register_test falcon_b0_register_tests[] = {
1003 EFX_OWORD32(0x0003FFFF, 0x0003FFFF, 0x0003FFFF, 0x0003FFFF) },
1005 EFX_OWORD32(0xFFFFFFFE, 0x00017FFF, 0x00000000, 0x00000000) },
1007 EFX_OWORD32(0x7FFF0037, 0x00000000, 0x00000000, 0x00000000) },
1008 { FR_AZ_TX_RESERVED,
1009 EFX_OWORD32(0xFFFEFE80, 0x1FFFFFFF, 0x020000FE, 0x007FFFFF) },
1011 EFX_OWORD32(0xFFFF0000, 0x00000000, 0x00000000, 0x00000000) },
1012 { FR_AZ_SRM_TX_DC_CFG,
1013 EFX_OWORD32(0x001FFFFF, 0x00000000, 0x00000000, 0x00000000) },
1015 EFX_OWORD32(0x0000000F, 0x00000000, 0x00000000, 0x00000000) },
1016 { FR_AZ_RX_DC_PF_WM,
1017 EFX_OWORD32(0x000003FF, 0x00000000, 0x00000000, 0x00000000) },
1019 EFX_OWORD32(0x00000FFF, 0x00000000, 0x00000000, 0x00000000) },
1021 EFX_OWORD32(0x00007337, 0x00000000, 0x00000000, 0x00000000) },
1023 EFX_OWORD32(0x00001F1F, 0x00000000, 0x00000000, 0x00000000) },
1025 EFX_OWORD32(0x00000C68, 0x00000000, 0x00000000, 0x00000000) },
1027 EFX_OWORD32(0x00080164, 0x00000000, 0x00000000, 0x00000000) },
1029 EFX_OWORD32(0x07100A0C, 0x00000000, 0x00000000, 0x00000000) },
1030 { FR_AB_XM_RX_PARAM,
1031 EFX_OWORD32(0x00001FF8, 0x00000000, 0x00000000, 0x00000000) },
1033 EFX_OWORD32(0xFFFF0001, 0x00000000, 0x00000000, 0x00000000) },
1035 EFX_OWORD32(0xFFFFFFFF, 0x00000000, 0x00000000, 0x00000000) },
1037 EFX_OWORD32(0x0003FF0F, 0x00000000, 0x00000000, 0x00000000) },
1040 static int falcon_b0_test_registers(struct efx_nic *efx)
1042 return efx_nic_test_registers(efx, falcon_b0_register_tests,
1043 ARRAY_SIZE(falcon_b0_register_tests));
1046 /**************************************************************************
1050 **************************************************************************
1053 /* Resets NIC to known state. This routine must be called in process
1054 * context and is allowed to sleep. */
1055 static int __falcon_reset_hw(struct efx_nic *efx, enum reset_type method)
1057 struct falcon_nic_data *nic_data = efx->nic_data;
1058 efx_oword_t glb_ctl_reg_ker;
1061 netif_dbg(efx, hw, efx->net_dev, "performing %s hardware reset\n",
1062 RESET_TYPE(method));
1064 /* Initiate device reset */
1065 if (method == RESET_TYPE_WORLD) {
1066 rc = pci_save_state(efx->pci_dev);
1068 netif_err(efx, drv, efx->net_dev,
1069 "failed to backup PCI state of primary "
1070 "function prior to hardware reset\n");
1073 if (efx_nic_is_dual_func(efx)) {
1074 rc = pci_save_state(nic_data->pci_dev2);
1076 netif_err(efx, drv, efx->net_dev,
1077 "failed to backup PCI state of "
1078 "secondary function prior to "
1079 "hardware reset\n");
1084 EFX_POPULATE_OWORD_2(glb_ctl_reg_ker,
1085 FRF_AB_EXT_PHY_RST_DUR,
1086 FFE_AB_EXT_PHY_RST_DUR_10240US,
1089 EFX_POPULATE_OWORD_7(glb_ctl_reg_ker,
1090 /* exclude PHY from "invisible" reset */
1091 FRF_AB_EXT_PHY_RST_CTL,
1092 method == RESET_TYPE_INVISIBLE,
1093 /* exclude EEPROM/flash and PCIe */
1094 FRF_AB_PCIE_CORE_RST_CTL, 1,
1095 FRF_AB_PCIE_NSTKY_RST_CTL, 1,
1096 FRF_AB_PCIE_SD_RST_CTL, 1,
1097 FRF_AB_EE_RST_CTL, 1,
1098 FRF_AB_EXT_PHY_RST_DUR,
1099 FFE_AB_EXT_PHY_RST_DUR_10240US,
1102 efx_writeo(efx, &glb_ctl_reg_ker, FR_AB_GLB_CTL);
1104 netif_dbg(efx, hw, efx->net_dev, "waiting for hardware reset\n");
1105 schedule_timeout_uninterruptible(HZ / 20);
1107 /* Restore PCI configuration if needed */
1108 if (method == RESET_TYPE_WORLD) {
1109 if (efx_nic_is_dual_func(efx)) {
1110 rc = pci_restore_state(nic_data->pci_dev2);
1112 netif_err(efx, drv, efx->net_dev,
1113 "failed to restore PCI config for "
1114 "the secondary function\n");
1118 rc = pci_restore_state(efx->pci_dev);
1120 netif_err(efx, drv, efx->net_dev,
1121 "failed to restore PCI config for the "
1122 "primary function\n");
1125 netif_dbg(efx, drv, efx->net_dev,
1126 "successfully restored PCI config\n");
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) {
1133 netif_err(efx, hw, efx->net_dev,
1134 "timed out waiting for hardware reset\n");
1137 netif_dbg(efx, hw, efx->net_dev, "hardware reset complete\n");
1141 /* pci_save_state() and pci_restore_state() MUST be called in pairs */
1144 pci_restore_state(efx->pci_dev);
1151 static int falcon_reset_hw(struct efx_nic *efx, enum reset_type method)
1153 struct falcon_nic_data *nic_data = efx->nic_data;
1156 mutex_lock(&nic_data->spi_lock);
1157 rc = __falcon_reset_hw(efx, method);
1158 mutex_unlock(&nic_data->spi_lock);
1163 static void falcon_monitor(struct efx_nic *efx)
1168 BUG_ON(!mutex_is_locked(&efx->mac_lock));
1170 rc = falcon_board(efx)->type->monitor(efx);
1172 netif_err(efx, hw, efx->net_dev,
1173 "Board sensor %s; shutting down PHY\n",
1174 (rc == -ERANGE) ? "reported fault" : "failed");
1175 efx->phy_mode |= PHY_MODE_LOW_POWER;
1176 rc = __efx_reconfigure_port(efx);
1180 if (LOOPBACK_INTERNAL(efx))
1181 link_changed = falcon_loopback_link_poll(efx);
1183 link_changed = efx->phy_op->poll(efx);
1186 falcon_stop_nic_stats(efx);
1187 falcon_deconfigure_mac_wrapper(efx);
1189 falcon_reset_macs(efx);
1190 rc = efx->mac_op->reconfigure(efx);
1193 falcon_start_nic_stats(efx);
1195 efx_link_status_changed(efx);
1198 falcon_poll_xmac(efx);
1201 /* Zeroes out the SRAM contents. This routine must be called in
1202 * process context and is allowed to sleep.
1204 static int falcon_reset_sram(struct efx_nic *efx)
1206 efx_oword_t srm_cfg_reg_ker, gpio_cfg_reg_ker;
1209 /* Set the SRAM wake/sleep GPIO appropriately. */
1210 efx_reado(efx, &gpio_cfg_reg_ker, FR_AB_GPIO_CTL);
1211 EFX_SET_OWORD_FIELD(gpio_cfg_reg_ker, FRF_AB_GPIO1_OEN, 1);
1212 EFX_SET_OWORD_FIELD(gpio_cfg_reg_ker, FRF_AB_GPIO1_OUT, 1);
1213 efx_writeo(efx, &gpio_cfg_reg_ker, FR_AB_GPIO_CTL);
1215 /* Initiate SRAM reset */
1216 EFX_POPULATE_OWORD_2(srm_cfg_reg_ker,
1217 FRF_AZ_SRM_INIT_EN, 1,
1218 FRF_AZ_SRM_NB_SZ, 0);
1219 efx_writeo(efx, &srm_cfg_reg_ker, FR_AZ_SRM_CFG);
1221 /* Wait for SRAM reset to complete */
1224 netif_dbg(efx, hw, efx->net_dev,
1225 "waiting for SRAM reset (attempt %d)...\n", count);
1227 /* SRAM reset is slow; expect around 16ms */
1228 schedule_timeout_uninterruptible(HZ / 50);
1230 /* Check for reset complete */
1231 efx_reado(efx, &srm_cfg_reg_ker, FR_AZ_SRM_CFG);
1232 if (!EFX_OWORD_FIELD(srm_cfg_reg_ker, FRF_AZ_SRM_INIT_EN)) {
1233 netif_dbg(efx, hw, efx->net_dev,
1234 "SRAM reset complete\n");
1238 } while (++count < 20); /* wait upto 0.4 sec */
1240 netif_err(efx, hw, efx->net_dev, "timed out waiting for SRAM reset\n");
1244 static void falcon_spi_device_init(struct efx_nic *efx,
1245 struct efx_spi_device *spi_device,
1246 unsigned int device_id, u32 device_type)
1248 if (device_type != 0) {
1249 spi_device->device_id = device_id;
1251 1 << SPI_DEV_TYPE_FIELD(device_type, SPI_DEV_TYPE_SIZE);
1252 spi_device->addr_len =
1253 SPI_DEV_TYPE_FIELD(device_type, SPI_DEV_TYPE_ADDR_LEN);
1254 spi_device->munge_address = (spi_device->size == 1 << 9 &&
1255 spi_device->addr_len == 1);
1256 spi_device->erase_command =
1257 SPI_DEV_TYPE_FIELD(device_type, SPI_DEV_TYPE_ERASE_CMD);
1258 spi_device->erase_size =
1259 1 << SPI_DEV_TYPE_FIELD(device_type,
1260 SPI_DEV_TYPE_ERASE_SIZE);
1261 spi_device->block_size =
1262 1 << SPI_DEV_TYPE_FIELD(device_type,
1263 SPI_DEV_TYPE_BLOCK_SIZE);
1265 spi_device->size = 0;
1269 /* Extract non-volatile configuration */
1270 static int falcon_probe_nvconfig(struct efx_nic *efx)
1272 struct falcon_nic_data *nic_data = efx->nic_data;
1273 struct falcon_nvconfig *nvconfig;
1276 nvconfig = kmalloc(sizeof(*nvconfig), GFP_KERNEL);
1280 rc = falcon_read_nvram(efx, nvconfig);
1284 efx->phy_type = nvconfig->board_v2.port0_phy_type;
1285 efx->mdio.prtad = nvconfig->board_v2.port0_phy_addr;
1287 if (le16_to_cpu(nvconfig->board_struct_ver) >= 3) {
1288 falcon_spi_device_init(
1289 efx, &nic_data->spi_flash, FFE_AB_SPI_DEVICE_FLASH,
1290 le32_to_cpu(nvconfig->board_v3
1291 .spi_device_type[FFE_AB_SPI_DEVICE_FLASH]));
1292 falcon_spi_device_init(
1293 efx, &nic_data->spi_eeprom, FFE_AB_SPI_DEVICE_EEPROM,
1294 le32_to_cpu(nvconfig->board_v3
1295 .spi_device_type[FFE_AB_SPI_DEVICE_EEPROM]));
1298 /* Read the MAC addresses */
1299 memcpy(efx->mac_address, nvconfig->mac_address[0], ETH_ALEN);
1301 netif_dbg(efx, probe, efx->net_dev, "PHY is %d phy_id %d\n",
1302 efx->phy_type, efx->mdio.prtad);
1304 rc = falcon_probe_board(efx,
1305 le16_to_cpu(nvconfig->board_v2.board_revision));
1311 /* Probe all SPI devices on the NIC */
1312 static void falcon_probe_spi_devices(struct efx_nic *efx)
1314 struct falcon_nic_data *nic_data = efx->nic_data;
1315 efx_oword_t nic_stat, gpio_ctl, ee_vpd_cfg;
1318 efx_reado(efx, &gpio_ctl, FR_AB_GPIO_CTL);
1319 efx_reado(efx, &nic_stat, FR_AB_NIC_STAT);
1320 efx_reado(efx, &ee_vpd_cfg, FR_AB_EE_VPD_CFG0);
1322 if (EFX_OWORD_FIELD(gpio_ctl, FRF_AB_GPIO3_PWRUP_VALUE)) {
1323 boot_dev = (EFX_OWORD_FIELD(nic_stat, FRF_AB_SF_PRST) ?
1324 FFE_AB_SPI_DEVICE_FLASH : FFE_AB_SPI_DEVICE_EEPROM);
1325 netif_dbg(efx, probe, efx->net_dev, "Booted from %s\n",
1326 boot_dev == FFE_AB_SPI_DEVICE_FLASH ?
1327 "flash" : "EEPROM");
1329 /* Disable VPD and set clock dividers to safe
1330 * values for initial programming. */
1332 netif_dbg(efx, probe, efx->net_dev,
1333 "Booted from internal ASIC settings;"
1334 " setting SPI config\n");
1335 EFX_POPULATE_OWORD_3(ee_vpd_cfg, FRF_AB_EE_VPD_EN, 0,
1336 /* 125 MHz / 7 ~= 20 MHz */
1337 FRF_AB_EE_SF_CLOCK_DIV, 7,
1338 /* 125 MHz / 63 ~= 2 MHz */
1339 FRF_AB_EE_EE_CLOCK_DIV, 63);
1340 efx_writeo(efx, &ee_vpd_cfg, FR_AB_EE_VPD_CFG0);
1343 mutex_init(&nic_data->spi_lock);
1345 if (boot_dev == FFE_AB_SPI_DEVICE_FLASH)
1346 falcon_spi_device_init(efx, &nic_data->spi_flash,
1347 FFE_AB_SPI_DEVICE_FLASH,
1348 default_flash_type);
1349 if (boot_dev == FFE_AB_SPI_DEVICE_EEPROM)
1350 falcon_spi_device_init(efx, &nic_data->spi_eeprom,
1351 FFE_AB_SPI_DEVICE_EEPROM,
1355 static int falcon_probe_nic(struct efx_nic *efx)
1357 struct falcon_nic_data *nic_data;
1358 struct falcon_board *board;
1361 /* Allocate storage for hardware specific data */
1362 nic_data = kzalloc(sizeof(*nic_data), GFP_KERNEL);
1365 efx->nic_data = nic_data;
1369 if (efx_nic_fpga_ver(efx) != 0) {
1370 netif_err(efx, probe, efx->net_dev,
1371 "Falcon FPGA not supported\n");
1375 if (efx_nic_rev(efx) <= EFX_REV_FALCON_A1) {
1376 efx_oword_t nic_stat;
1377 struct pci_dev *dev;
1378 u8 pci_rev = efx->pci_dev->revision;
1380 if ((pci_rev == 0xff) || (pci_rev == 0)) {
1381 netif_err(efx, probe, efx->net_dev,
1382 "Falcon rev A0 not supported\n");
1385 efx_reado(efx, &nic_stat, FR_AB_NIC_STAT);
1386 if (EFX_OWORD_FIELD(nic_stat, FRF_AB_STRAP_10G) == 0) {
1387 netif_err(efx, probe, efx->net_dev,
1388 "Falcon rev A1 1G not supported\n");
1391 if (EFX_OWORD_FIELD(nic_stat, FRF_AA_STRAP_PCIE) == 0) {
1392 netif_err(efx, probe, efx->net_dev,
1393 "Falcon rev A1 PCI-X not supported\n");
1397 dev = pci_dev_get(efx->pci_dev);
1398 while ((dev = pci_get_device(EFX_VENDID_SFC, FALCON_A_S_DEVID,
1400 if (dev->bus == efx->pci_dev->bus &&
1401 dev->devfn == efx->pci_dev->devfn + 1) {
1402 nic_data->pci_dev2 = dev;
1406 if (!nic_data->pci_dev2) {
1407 netif_err(efx, probe, efx->net_dev,
1408 "failed to find secondary function\n");
1414 /* Now we can reset the NIC */
1415 rc = __falcon_reset_hw(efx, RESET_TYPE_ALL);
1417 netif_err(efx, probe, efx->net_dev, "failed to reset NIC\n");
1421 /* Allocate memory for INT_KER */
1422 rc = efx_nic_alloc_buffer(efx, &efx->irq_status, sizeof(efx_oword_t));
1425 BUG_ON(efx->irq_status.dma_addr & 0x0f);
1427 netif_dbg(efx, probe, efx->net_dev,
1428 "INT_KER at %llx (virt %p phys %llx)\n",
1429 (u64)efx->irq_status.dma_addr,
1430 efx->irq_status.addr,
1431 (u64)virt_to_phys(efx->irq_status.addr));
1433 falcon_probe_spi_devices(efx);
1435 /* Read in the non-volatile configuration */
1436 rc = falcon_probe_nvconfig(efx);
1439 netif_err(efx, probe, efx->net_dev, "NVRAM is invalid\n");
1443 /* Initialise I2C adapter */
1444 board = falcon_board(efx);
1445 board->i2c_adap.owner = THIS_MODULE;
1446 board->i2c_data = falcon_i2c_bit_operations;
1447 board->i2c_data.data = efx;
1448 board->i2c_adap.algo_data = &board->i2c_data;
1449 board->i2c_adap.dev.parent = &efx->pci_dev->dev;
1450 strlcpy(board->i2c_adap.name, "SFC4000 GPIO",
1451 sizeof(board->i2c_adap.name));
1452 rc = i2c_bit_add_bus(&board->i2c_adap);
1456 rc = falcon_board(efx)->type->init(efx);
1458 netif_err(efx, probe, efx->net_dev,
1459 "failed to initialise board\n");
1463 nic_data->stats_disable_count = 1;
1464 setup_timer(&nic_data->stats_timer, &falcon_stats_timer_func,
1465 (unsigned long)efx);
1470 BUG_ON(i2c_del_adapter(&board->i2c_adap));
1471 memset(&board->i2c_adap, 0, sizeof(board->i2c_adap));
1473 efx_nic_free_buffer(efx, &efx->irq_status);
1476 if (nic_data->pci_dev2) {
1477 pci_dev_put(nic_data->pci_dev2);
1478 nic_data->pci_dev2 = NULL;
1482 kfree(efx->nic_data);
1486 static void falcon_init_rx_cfg(struct efx_nic *efx)
1488 /* Prior to Siena the RX DMA engine will split each frame at
1489 * intervals of RX_USR_BUF_SIZE (32-byte units). We set it to
1490 * be so large that that never happens. */
1491 const unsigned huge_buf_size = (3 * 4096) >> 5;
1492 /* RX control FIFO thresholds (32 entries) */
1493 const unsigned ctrl_xon_thr = 20;
1494 const unsigned ctrl_xoff_thr = 25;
1495 /* RX data FIFO thresholds (256-byte units; size varies) */
1496 int data_xon_thr = efx_nic_rx_xon_thresh >> 8;
1497 int data_xoff_thr = efx_nic_rx_xoff_thresh >> 8;
1500 efx_reado(efx, ®, FR_AZ_RX_CFG);
1501 if (efx_nic_rev(efx) <= EFX_REV_FALCON_A1) {
1502 /* Data FIFO size is 5.5K */
1503 if (data_xon_thr < 0)
1504 data_xon_thr = 512 >> 8;
1505 if (data_xoff_thr < 0)
1506 data_xoff_thr = 2048 >> 8;
1507 EFX_SET_OWORD_FIELD(reg, FRF_AA_RX_DESC_PUSH_EN, 0);
1508 EFX_SET_OWORD_FIELD(reg, FRF_AA_RX_USR_BUF_SIZE,
1510 EFX_SET_OWORD_FIELD(reg, FRF_AA_RX_XON_MAC_TH, data_xon_thr);
1511 EFX_SET_OWORD_FIELD(reg, FRF_AA_RX_XOFF_MAC_TH, data_xoff_thr);
1512 EFX_SET_OWORD_FIELD(reg, FRF_AA_RX_XON_TX_TH, ctrl_xon_thr);
1513 EFX_SET_OWORD_FIELD(reg, FRF_AA_RX_XOFF_TX_TH, ctrl_xoff_thr);
1515 /* Data FIFO size is 80K; register fields moved */
1516 if (data_xon_thr < 0)
1517 data_xon_thr = 27648 >> 8; /* ~3*max MTU */
1518 if (data_xoff_thr < 0)
1519 data_xoff_thr = 54272 >> 8; /* ~80Kb - 3*max MTU */
1520 EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_DESC_PUSH_EN, 0);
1521 EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_USR_BUF_SIZE,
1523 EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_XON_MAC_TH, data_xon_thr);
1524 EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_XOFF_MAC_TH, data_xoff_thr);
1525 EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_XON_TX_TH, ctrl_xon_thr);
1526 EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_XOFF_TX_TH, ctrl_xoff_thr);
1527 EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_INGR_EN, 1);
1529 /* Enable hash insertion. This is broken for the
1530 * 'Falcon' hash so also select Toeplitz TCP/IPv4 and
1532 EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_HASH_INSRT_HDR, 1);
1533 EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_HASH_ALG, 1);
1534 EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_IP_HASH, 1);
1536 /* Always enable XOFF signal from RX FIFO. We enable
1537 * or disable transmission of pause frames at the MAC. */
1538 EFX_SET_OWORD_FIELD(reg, FRF_AZ_RX_XOFF_MAC_EN, 1);
1539 efx_writeo(efx, ®, FR_AZ_RX_CFG);
1542 /* This call performs hardware-specific global initialisation, such as
1543 * defining the descriptor cache sizes and number of RSS channels.
1544 * It does not set up any buffers, descriptor rings or event queues.
1546 static int falcon_init_nic(struct efx_nic *efx)
1551 /* Use on-chip SRAM */
1552 efx_reado(efx, &temp, FR_AB_NIC_STAT);
1553 EFX_SET_OWORD_FIELD(temp, FRF_AB_ONCHIP_SRAM, 1);
1554 efx_writeo(efx, &temp, FR_AB_NIC_STAT);
1556 rc = falcon_reset_sram(efx);
1560 /* Clear the parity enables on the TX data fifos as
1561 * they produce false parity errors because of timing issues
1563 if (EFX_WORKAROUND_5129(efx)) {
1564 efx_reado(efx, &temp, FR_AZ_CSR_SPARE);
1565 EFX_SET_OWORD_FIELD(temp, FRF_AB_MEM_PERR_EN_TX_DATA, 0);
1566 efx_writeo(efx, &temp, FR_AZ_CSR_SPARE);
1569 if (EFX_WORKAROUND_7244(efx)) {
1570 efx_reado(efx, &temp, FR_BZ_RX_FILTER_CTL);
1571 EFX_SET_OWORD_FIELD(temp, FRF_BZ_UDP_FULL_SRCH_LIMIT, 8);
1572 EFX_SET_OWORD_FIELD(temp, FRF_BZ_UDP_WILD_SRCH_LIMIT, 8);
1573 EFX_SET_OWORD_FIELD(temp, FRF_BZ_TCP_FULL_SRCH_LIMIT, 8);
1574 EFX_SET_OWORD_FIELD(temp, FRF_BZ_TCP_WILD_SRCH_LIMIT, 8);
1575 efx_writeo(efx, &temp, FR_BZ_RX_FILTER_CTL);
1578 /* XXX This is documented only for Falcon A0/A1 */
1579 /* Setup RX. Wait for descriptor is broken and must
1580 * be disabled. RXDP recovery shouldn't be needed, but is.
1582 efx_reado(efx, &temp, FR_AA_RX_SELF_RST);
1583 EFX_SET_OWORD_FIELD(temp, FRF_AA_RX_NODESC_WAIT_DIS, 1);
1584 EFX_SET_OWORD_FIELD(temp, FRF_AA_RX_SELF_RST_EN, 1);
1585 if (EFX_WORKAROUND_5583(efx))
1586 EFX_SET_OWORD_FIELD(temp, FRF_AA_RX_ISCSI_DIS, 1);
1587 efx_writeo(efx, &temp, FR_AA_RX_SELF_RST);
1589 /* Do not enable TX_NO_EOP_DISC_EN, since it limits packets to 16
1590 * descriptors (which is bad).
1592 efx_reado(efx, &temp, FR_AZ_TX_CFG);
1593 EFX_SET_OWORD_FIELD(temp, FRF_AZ_TX_NO_EOP_DISC_EN, 0);
1594 efx_writeo(efx, &temp, FR_AZ_TX_CFG);
1596 falcon_init_rx_cfg(efx);
1598 if (efx_nic_rev(efx) >= EFX_REV_FALCON_B0) {
1599 /* Set hash key for IPv4 */
1600 memcpy(&temp, efx->rx_hash_key, sizeof(temp));
1601 efx_writeo(efx, &temp, FR_BZ_RX_RSS_TKEY);
1603 /* Set destination of both TX and RX Flush events */
1604 EFX_POPULATE_OWORD_1(temp, FRF_BZ_FLS_EVQ_ID, 0);
1605 efx_writeo(efx, &temp, FR_BZ_DP_CTRL);
1608 efx_nic_init_common(efx);
1613 static void falcon_remove_nic(struct efx_nic *efx)
1615 struct falcon_nic_data *nic_data = efx->nic_data;
1616 struct falcon_board *board = falcon_board(efx);
1619 board->type->fini(efx);
1621 /* Remove I2C adapter and clear it in preparation for a retry */
1622 rc = i2c_del_adapter(&board->i2c_adap);
1624 memset(&board->i2c_adap, 0, sizeof(board->i2c_adap));
1626 efx_nic_free_buffer(efx, &efx->irq_status);
1628 __falcon_reset_hw(efx, RESET_TYPE_ALL);
1630 /* Release the second function after the reset */
1631 if (nic_data->pci_dev2) {
1632 pci_dev_put(nic_data->pci_dev2);
1633 nic_data->pci_dev2 = NULL;
1636 /* Tear down the private nic state */
1637 kfree(efx->nic_data);
1638 efx->nic_data = NULL;
1641 static void falcon_update_nic_stats(struct efx_nic *efx)
1643 struct falcon_nic_data *nic_data = efx->nic_data;
1646 if (nic_data->stats_disable_count)
1649 efx_reado(efx, &cnt, FR_AZ_RX_NODESC_DROP);
1650 efx->n_rx_nodesc_drop_cnt +=
1651 EFX_OWORD_FIELD(cnt, FRF_AB_RX_NODESC_DROP_CNT);
1653 if (nic_data->stats_pending &&
1654 *nic_data->stats_dma_done == FALCON_STATS_DONE) {
1655 nic_data->stats_pending = false;
1656 rmb(); /* read the done flag before the stats */
1657 efx->mac_op->update_stats(efx);
1661 void falcon_start_nic_stats(struct efx_nic *efx)
1663 struct falcon_nic_data *nic_data = efx->nic_data;
1665 spin_lock_bh(&efx->stats_lock);
1666 if (--nic_data->stats_disable_count == 0)
1667 falcon_stats_request(efx);
1668 spin_unlock_bh(&efx->stats_lock);
1671 void falcon_stop_nic_stats(struct efx_nic *efx)
1673 struct falcon_nic_data *nic_data = efx->nic_data;
1678 spin_lock_bh(&efx->stats_lock);
1679 ++nic_data->stats_disable_count;
1680 spin_unlock_bh(&efx->stats_lock);
1682 del_timer_sync(&nic_data->stats_timer);
1684 /* Wait enough time for the most recent transfer to
1686 for (i = 0; i < 4 && nic_data->stats_pending; i++) {
1687 if (*nic_data->stats_dma_done == FALCON_STATS_DONE)
1692 spin_lock_bh(&efx->stats_lock);
1693 falcon_stats_complete(efx);
1694 spin_unlock_bh(&efx->stats_lock);
1697 static void falcon_set_id_led(struct efx_nic *efx, enum efx_led_mode mode)
1699 falcon_board(efx)->type->set_id_led(efx, mode);
1702 /**************************************************************************
1706 **************************************************************************
1709 static void falcon_get_wol(struct efx_nic *efx, struct ethtool_wolinfo *wol)
1713 memset(&wol->sopass, 0, sizeof(wol->sopass));
1716 static int falcon_set_wol(struct efx_nic *efx, u32 type)
1723 /**************************************************************************
1725 * Revision-dependent attributes used by efx.c and nic.c
1727 **************************************************************************
1730 struct efx_nic_type falcon_a1_nic_type = {
1731 .probe = falcon_probe_nic,
1732 .remove = falcon_remove_nic,
1733 .init = falcon_init_nic,
1734 .fini = efx_port_dummy_op_void,
1735 .monitor = falcon_monitor,
1736 .reset = falcon_reset_hw,
1737 .probe_port = falcon_probe_port,
1738 .remove_port = falcon_remove_port,
1739 .handle_global_event = falcon_handle_global_event,
1740 .prepare_flush = falcon_prepare_flush,
1741 .update_stats = falcon_update_nic_stats,
1742 .start_stats = falcon_start_nic_stats,
1743 .stop_stats = falcon_stop_nic_stats,
1744 .set_id_led = falcon_set_id_led,
1745 .push_irq_moderation = falcon_push_irq_moderation,
1746 .push_multicast_hash = falcon_push_multicast_hash,
1747 .reconfigure_port = falcon_reconfigure_port,
1748 .get_wol = falcon_get_wol,
1749 .set_wol = falcon_set_wol,
1750 .resume_wol = efx_port_dummy_op_void,
1751 .test_nvram = falcon_test_nvram,
1752 .default_mac_ops = &falcon_xmac_operations,
1754 .revision = EFX_REV_FALCON_A1,
1755 .mem_map_size = 0x20000,
1756 .txd_ptr_tbl_base = FR_AA_TX_DESC_PTR_TBL_KER,
1757 .rxd_ptr_tbl_base = FR_AA_RX_DESC_PTR_TBL_KER,
1758 .buf_tbl_base = FR_AA_BUF_FULL_TBL_KER,
1759 .evq_ptr_tbl_base = FR_AA_EVQ_PTR_TBL_KER,
1760 .evq_rptr_tbl_base = FR_AA_EVQ_RPTR_KER,
1761 .max_dma_mask = DMA_BIT_MASK(FSF_AZ_TX_KER_BUF_ADDR_WIDTH),
1762 .rx_buffer_padding = 0x24,
1763 .max_interrupt_mode = EFX_INT_MODE_MSI,
1764 .phys_addr_channels = 4,
1765 .tx_dc_base = 0x130000,
1766 .rx_dc_base = 0x100000,
1767 .offload_features = NETIF_F_IP_CSUM,
1768 .reset_world_flags = ETH_RESET_IRQ,
1771 struct efx_nic_type falcon_b0_nic_type = {
1772 .probe = falcon_probe_nic,
1773 .remove = falcon_remove_nic,
1774 .init = falcon_init_nic,
1775 .fini = efx_port_dummy_op_void,
1776 .monitor = falcon_monitor,
1777 .reset = falcon_reset_hw,
1778 .probe_port = falcon_probe_port,
1779 .remove_port = falcon_remove_port,
1780 .handle_global_event = falcon_handle_global_event,
1781 .prepare_flush = falcon_prepare_flush,
1782 .update_stats = falcon_update_nic_stats,
1783 .start_stats = falcon_start_nic_stats,
1784 .stop_stats = falcon_stop_nic_stats,
1785 .set_id_led = falcon_set_id_led,
1786 .push_irq_moderation = falcon_push_irq_moderation,
1787 .push_multicast_hash = falcon_push_multicast_hash,
1788 .reconfigure_port = falcon_reconfigure_port,
1789 .get_wol = falcon_get_wol,
1790 .set_wol = falcon_set_wol,
1791 .resume_wol = efx_port_dummy_op_void,
1792 .test_registers = falcon_b0_test_registers,
1793 .test_nvram = falcon_test_nvram,
1794 .default_mac_ops = &falcon_xmac_operations,
1796 .revision = EFX_REV_FALCON_B0,
1797 /* Map everything up to and including the RSS indirection
1798 * table. Don't map MSI-X table, MSI-X PBA since Linux
1799 * requires that they not be mapped. */
1800 .mem_map_size = (FR_BZ_RX_INDIRECTION_TBL +
1801 FR_BZ_RX_INDIRECTION_TBL_STEP *
1802 FR_BZ_RX_INDIRECTION_TBL_ROWS),
1803 .txd_ptr_tbl_base = FR_BZ_TX_DESC_PTR_TBL,
1804 .rxd_ptr_tbl_base = FR_BZ_RX_DESC_PTR_TBL,
1805 .buf_tbl_base = FR_BZ_BUF_FULL_TBL,
1806 .evq_ptr_tbl_base = FR_BZ_EVQ_PTR_TBL,
1807 .evq_rptr_tbl_base = FR_BZ_EVQ_RPTR,
1808 .max_dma_mask = DMA_BIT_MASK(FSF_AZ_TX_KER_BUF_ADDR_WIDTH),
1809 .rx_buffer_hash_size = 0x10,
1810 .rx_buffer_padding = 0,
1811 .max_interrupt_mode = EFX_INT_MODE_MSIX,
1812 .phys_addr_channels = 32, /* Hardware limit is 64, but the legacy
1813 * interrupt handler only supports 32
1815 .tx_dc_base = 0x130000,
1816 .rx_dc_base = 0x100000,
1817 .offload_features = NETIF_F_IP_CSUM | NETIF_F_RXHASH | NETIF_F_NTUPLE,
1818 .reset_world_flags = ETH_RESET_IRQ,