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"
29 #include "workarounds.h"
31 /* Hardware control for SFC4000 (aka Falcon). */
33 static const unsigned int
34 /* "Large" EEPROM device: Atmel AT25640 or similar
35 * 8 KB, 16-bit address, 32 B write block */
36 large_eeprom_type = ((13 << SPI_DEV_TYPE_SIZE_LBN)
37 | (2 << SPI_DEV_TYPE_ADDR_LEN_LBN)
38 | (5 << SPI_DEV_TYPE_BLOCK_SIZE_LBN)),
39 /* Default flash device: Atmel AT25F1024
40 * 128 KB, 24-bit address, 32 KB erase block, 256 B write block */
41 default_flash_type = ((17 << SPI_DEV_TYPE_SIZE_LBN)
42 | (3 << SPI_DEV_TYPE_ADDR_LEN_LBN)
43 | (0x52 << SPI_DEV_TYPE_ERASE_CMD_LBN)
44 | (15 << SPI_DEV_TYPE_ERASE_SIZE_LBN)
45 | (8 << SPI_DEV_TYPE_BLOCK_SIZE_LBN));
47 /**************************************************************************
49 * I2C bus - this is a bit-bashing interface using GPIO pins
50 * Note that it uses the output enables to tristate the outputs
51 * SDA is the data pin and SCL is the clock
53 **************************************************************************
55 static void falcon_setsda(void *data, int state)
57 struct efx_nic *efx = (struct efx_nic *)data;
60 efx_reado(efx, ®, FR_AB_GPIO_CTL);
61 EFX_SET_OWORD_FIELD(reg, FRF_AB_GPIO3_OEN, !state);
62 efx_writeo(efx, ®, FR_AB_GPIO_CTL);
65 static void falcon_setscl(void *data, int state)
67 struct efx_nic *efx = (struct efx_nic *)data;
70 efx_reado(efx, ®, FR_AB_GPIO_CTL);
71 EFX_SET_OWORD_FIELD(reg, FRF_AB_GPIO0_OEN, !state);
72 efx_writeo(efx, ®, FR_AB_GPIO_CTL);
75 static int falcon_getsda(void *data)
77 struct efx_nic *efx = (struct efx_nic *)data;
80 efx_reado(efx, ®, FR_AB_GPIO_CTL);
81 return EFX_OWORD_FIELD(reg, FRF_AB_GPIO3_IN);
84 static int falcon_getscl(void *data)
86 struct efx_nic *efx = (struct efx_nic *)data;
89 efx_reado(efx, ®, FR_AB_GPIO_CTL);
90 return EFX_OWORD_FIELD(reg, FRF_AB_GPIO0_IN);
93 static struct i2c_algo_bit_data falcon_i2c_bit_operations = {
94 .setsda = falcon_setsda,
95 .setscl = falcon_setscl,
96 .getsda = falcon_getsda,
97 .getscl = falcon_getscl,
99 /* Wait up to 50 ms for slave to let us pull SCL high */
100 .timeout = DIV_ROUND_UP(HZ, 20),
103 static void falcon_push_irq_moderation(struct efx_channel *channel)
105 efx_dword_t timer_cmd;
106 struct efx_nic *efx = channel->efx;
108 /* Set timer register */
109 if (channel->irq_moderation) {
110 EFX_POPULATE_DWORD_2(timer_cmd,
111 FRF_AB_TC_TIMER_MODE,
112 FFE_BB_TIMER_MODE_INT_HLDOFF,
114 channel->irq_moderation - 1);
116 EFX_POPULATE_DWORD_2(timer_cmd,
117 FRF_AB_TC_TIMER_MODE,
118 FFE_BB_TIMER_MODE_DIS,
119 FRF_AB_TC_TIMER_VAL, 0);
121 BUILD_BUG_ON(FR_AA_TIMER_COMMAND_KER != FR_BZ_TIMER_COMMAND_P0);
122 efx_writed_page_locked(efx, &timer_cmd, FR_BZ_TIMER_COMMAND_P0,
126 static void falcon_deconfigure_mac_wrapper(struct efx_nic *efx);
128 static void falcon_prepare_flush(struct efx_nic *efx)
130 falcon_deconfigure_mac_wrapper(efx);
132 /* Wait for the tx and rx fifo's to get to the next packet boundary
133 * (~1ms without back-pressure), then to drain the remainder of the
134 * fifo's at data path speeds (negligible), with a healthy margin. */
138 /* Acknowledge a legacy interrupt from Falcon
140 * This acknowledges a legacy (not MSI) interrupt via INT_ACK_KER_REG.
142 * Due to SFC bug 3706 (silicon revision <=A1) reads can be duplicated in the
143 * BIU. Interrupt acknowledge is read sensitive so must write instead
144 * (then read to ensure the BIU collector is flushed)
146 * NB most hardware supports MSI interrupts
148 inline void falcon_irq_ack_a1(struct efx_nic *efx)
152 EFX_POPULATE_DWORD_1(reg, FRF_AA_INT_ACK_KER_FIELD, 0xb7eb7e);
153 efx_writed(efx, ®, FR_AA_INT_ACK_KER);
154 efx_readd(efx, ®, FR_AA_WORK_AROUND_BROKEN_PCI_READS);
158 irqreturn_t falcon_legacy_interrupt_a1(int irq, void *dev_id)
160 struct efx_nic *efx = dev_id;
161 efx_oword_t *int_ker = efx->irq_status.addr;
162 struct efx_channel *channel;
166 /* Check to see if this is our interrupt. If it isn't, we
167 * exit without having touched the hardware.
169 if (unlikely(EFX_OWORD_IS_ZERO(*int_ker))) {
170 EFX_TRACE(efx, "IRQ %d on CPU %d not for me\n", irq,
171 raw_smp_processor_id());
174 efx->last_irq_cpu = raw_smp_processor_id();
175 EFX_TRACE(efx, "IRQ %d on CPU %d status " EFX_OWORD_FMT "\n",
176 irq, raw_smp_processor_id(), EFX_OWORD_VAL(*int_ker));
178 /* Check to see if we have a serious error condition */
179 syserr = EFX_OWORD_FIELD(*int_ker, FSF_AZ_NET_IVEC_FATAL_INT);
180 if (unlikely(syserr))
181 return efx_nic_fatal_interrupt(efx);
183 /* Determine interrupting queues, clear interrupt status
184 * register and acknowledge the device interrupt.
186 BUILD_BUG_ON(FSF_AZ_NET_IVEC_INT_Q_WIDTH > EFX_MAX_CHANNELS);
187 queues = EFX_OWORD_FIELD(*int_ker, FSF_AZ_NET_IVEC_INT_Q);
188 EFX_ZERO_OWORD(*int_ker);
189 wmb(); /* Ensure the vector is cleared before interrupt ack */
190 falcon_irq_ack_a1(efx);
192 /* Schedule processing of any interrupting queues */
193 channel = &efx->channel[0];
196 efx_schedule_channel(channel);
203 /**************************************************************************
207 **************************************************************************
210 #define FALCON_SPI_MAX_LEN sizeof(efx_oword_t)
212 static int falcon_spi_poll(struct efx_nic *efx)
215 efx_reado(efx, ®, FR_AB_EE_SPI_HCMD);
216 return EFX_OWORD_FIELD(reg, FRF_AB_EE_SPI_HCMD_CMD_EN) ? -EBUSY : 0;
219 /* Wait for SPI command completion */
220 static int falcon_spi_wait(struct efx_nic *efx)
222 /* Most commands will finish quickly, so we start polling at
223 * very short intervals. Sometimes the command may have to
224 * wait for VPD or expansion ROM access outside of our
225 * control, so we allow up to 100 ms. */
226 unsigned long timeout = jiffies + 1 + DIV_ROUND_UP(HZ, 10);
229 for (i = 0; i < 10; i++) {
230 if (!falcon_spi_poll(efx))
236 if (!falcon_spi_poll(efx))
238 if (time_after_eq(jiffies, timeout)) {
239 EFX_ERR(efx, "timed out waiting for SPI\n");
242 schedule_timeout_uninterruptible(1);
246 int falcon_spi_cmd(struct efx_nic *efx, const struct efx_spi_device *spi,
247 unsigned int command, int address,
248 const void *in, void *out, size_t len)
250 bool addressed = (address >= 0);
251 bool reading = (out != NULL);
255 /* Input validation */
256 if (len > FALCON_SPI_MAX_LEN)
258 BUG_ON(!mutex_is_locked(&efx->spi_lock));
260 /* Check that previous command is not still running */
261 rc = falcon_spi_poll(efx);
265 /* Program address register, if we have an address */
267 EFX_POPULATE_OWORD_1(reg, FRF_AB_EE_SPI_HADR_ADR, address);
268 efx_writeo(efx, ®, FR_AB_EE_SPI_HADR);
271 /* Program data register, if we have data */
273 memcpy(®, in, len);
274 efx_writeo(efx, ®, FR_AB_EE_SPI_HDATA);
277 /* Issue read/write command */
278 EFX_POPULATE_OWORD_7(reg,
279 FRF_AB_EE_SPI_HCMD_CMD_EN, 1,
280 FRF_AB_EE_SPI_HCMD_SF_SEL, spi->device_id,
281 FRF_AB_EE_SPI_HCMD_DABCNT, len,
282 FRF_AB_EE_SPI_HCMD_READ, reading,
283 FRF_AB_EE_SPI_HCMD_DUBCNT, 0,
284 FRF_AB_EE_SPI_HCMD_ADBCNT,
285 (addressed ? spi->addr_len : 0),
286 FRF_AB_EE_SPI_HCMD_ENC, command);
287 efx_writeo(efx, ®, FR_AB_EE_SPI_HCMD);
289 /* Wait for read/write to complete */
290 rc = falcon_spi_wait(efx);
296 efx_reado(efx, ®, FR_AB_EE_SPI_HDATA);
297 memcpy(out, ®, len);
304 falcon_spi_write_limit(const struct efx_spi_device *spi, size_t start)
306 return min(FALCON_SPI_MAX_LEN,
307 (spi->block_size - (start & (spi->block_size - 1))));
311 efx_spi_munge_command(const struct efx_spi_device *spi,
312 const u8 command, const unsigned int address)
314 return command | (((address >> 8) & spi->munge_address) << 3);
317 /* Wait up to 10 ms for buffered write completion */
319 falcon_spi_wait_write(struct efx_nic *efx, const struct efx_spi_device *spi)
321 unsigned long timeout = jiffies + 1 + DIV_ROUND_UP(HZ, 100);
326 rc = falcon_spi_cmd(efx, spi, SPI_RDSR, -1, NULL,
327 &status, sizeof(status));
330 if (!(status & SPI_STATUS_NRDY))
332 if (time_after_eq(jiffies, timeout)) {
333 EFX_ERR(efx, "SPI write timeout on device %d"
334 " last status=0x%02x\n",
335 spi->device_id, status);
338 schedule_timeout_uninterruptible(1);
342 int falcon_spi_read(struct efx_nic *efx, const struct efx_spi_device *spi,
343 loff_t start, size_t len, size_t *retlen, u8 *buffer)
345 size_t block_len, pos = 0;
346 unsigned int command;
350 block_len = min(len - pos, FALCON_SPI_MAX_LEN);
352 command = efx_spi_munge_command(spi, SPI_READ, start + pos);
353 rc = falcon_spi_cmd(efx, spi, command, start + pos, NULL,
354 buffer + pos, block_len);
359 /* Avoid locking up the system */
361 if (signal_pending(current)) {
373 falcon_spi_write(struct efx_nic *efx, const struct efx_spi_device *spi,
374 loff_t start, size_t len, size_t *retlen, const u8 *buffer)
376 u8 verify_buffer[FALCON_SPI_MAX_LEN];
377 size_t block_len, pos = 0;
378 unsigned int command;
382 rc = falcon_spi_cmd(efx, spi, SPI_WREN, -1, NULL, NULL, 0);
386 block_len = min(len - pos,
387 falcon_spi_write_limit(spi, start + pos));
388 command = efx_spi_munge_command(spi, SPI_WRITE, start + pos);
389 rc = falcon_spi_cmd(efx, spi, command, start + pos,
390 buffer + pos, NULL, block_len);
394 rc = falcon_spi_wait_write(efx, spi);
398 command = efx_spi_munge_command(spi, SPI_READ, start + pos);
399 rc = falcon_spi_cmd(efx, spi, command, start + pos,
400 NULL, verify_buffer, block_len);
401 if (memcmp(verify_buffer, buffer + pos, block_len)) {
408 /* Avoid locking up the system */
410 if (signal_pending(current)) {
421 /**************************************************************************
425 **************************************************************************
428 static void falcon_push_multicast_hash(struct efx_nic *efx)
430 union efx_multicast_hash *mc_hash = &efx->multicast_hash;
432 WARN_ON(!mutex_is_locked(&efx->mac_lock));
434 efx_writeo(efx, &mc_hash->oword[0], FR_AB_MAC_MC_HASH_REG0);
435 efx_writeo(efx, &mc_hash->oword[1], FR_AB_MAC_MC_HASH_REG1);
438 static void falcon_reset_macs(struct efx_nic *efx)
440 struct falcon_nic_data *nic_data = efx->nic_data;
441 efx_oword_t reg, mac_ctrl;
444 if (efx_nic_rev(efx) < EFX_REV_FALCON_B0) {
445 /* It's not safe to use GLB_CTL_REG to reset the
446 * macs, so instead use the internal MAC resets
448 if (!EFX_IS10G(efx)) {
449 EFX_POPULATE_OWORD_1(reg, FRF_AB_GM_SW_RST, 1);
450 efx_writeo(efx, ®, FR_AB_GM_CFG1);
453 EFX_POPULATE_OWORD_1(reg, FRF_AB_GM_SW_RST, 0);
454 efx_writeo(efx, ®, FR_AB_GM_CFG1);
458 EFX_POPULATE_OWORD_1(reg, FRF_AB_XM_CORE_RST, 1);
459 efx_writeo(efx, ®, FR_AB_XM_GLB_CFG);
461 for (count = 0; count < 10000; count++) {
462 efx_reado(efx, ®, FR_AB_XM_GLB_CFG);
463 if (EFX_OWORD_FIELD(reg, FRF_AB_XM_CORE_RST) ==
469 EFX_ERR(efx, "timed out waiting for XMAC core reset\n");
473 /* Mac stats will fail whist the TX fifo is draining */
474 WARN_ON(nic_data->stats_disable_count == 0);
476 efx_reado(efx, &mac_ctrl, FR_AB_MAC_CTRL);
477 EFX_SET_OWORD_FIELD(mac_ctrl, FRF_BB_TXFIFO_DRAIN_EN, 1);
478 efx_writeo(efx, &mac_ctrl, FR_AB_MAC_CTRL);
480 efx_reado(efx, ®, FR_AB_GLB_CTL);
481 EFX_SET_OWORD_FIELD(reg, FRF_AB_RST_XGTX, 1);
482 EFX_SET_OWORD_FIELD(reg, FRF_AB_RST_XGRX, 1);
483 EFX_SET_OWORD_FIELD(reg, FRF_AB_RST_EM, 1);
484 efx_writeo(efx, ®, FR_AB_GLB_CTL);
488 efx_reado(efx, ®, FR_AB_GLB_CTL);
489 if (!EFX_OWORD_FIELD(reg, FRF_AB_RST_XGTX) &&
490 !EFX_OWORD_FIELD(reg, FRF_AB_RST_XGRX) &&
491 !EFX_OWORD_FIELD(reg, FRF_AB_RST_EM)) {
492 EFX_LOG(efx, "Completed MAC reset after %d loops\n",
497 EFX_ERR(efx, "MAC reset failed\n");
504 /* Ensure the correct MAC is selected before statistics
505 * are re-enabled by the caller */
506 efx_writeo(efx, &mac_ctrl, FR_AB_MAC_CTRL);
509 void falcon_drain_tx_fifo(struct efx_nic *efx)
513 if ((efx_nic_rev(efx) < EFX_REV_FALCON_B0) ||
514 (efx->loopback_mode != LOOPBACK_NONE))
517 efx_reado(efx, ®, FR_AB_MAC_CTRL);
518 /* There is no point in draining more than once */
519 if (EFX_OWORD_FIELD(reg, FRF_BB_TXFIFO_DRAIN_EN))
522 falcon_reset_macs(efx);
525 static void falcon_deconfigure_mac_wrapper(struct efx_nic *efx)
529 if (efx_nic_rev(efx) < EFX_REV_FALCON_B0)
532 /* Isolate the MAC -> RX */
533 efx_reado(efx, ®, FR_AZ_RX_CFG);
534 EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_INGR_EN, 0);
535 efx_writeo(efx, ®, FR_AZ_RX_CFG);
537 /* Isolate TX -> MAC */
538 falcon_drain_tx_fifo(efx);
541 void falcon_reconfigure_mac_wrapper(struct efx_nic *efx)
543 struct efx_link_state *link_state = &efx->link_state;
547 switch (link_state->speed) {
548 case 10000: link_speed = 3; break;
549 case 1000: link_speed = 2; break;
550 case 100: link_speed = 1; break;
551 default: link_speed = 0; break;
553 /* MAC_LINK_STATUS controls MAC backpressure but doesn't work
554 * as advertised. Disable to ensure packets are not
555 * indefinitely held and TX queue can be flushed at any point
556 * while the link is down. */
557 EFX_POPULATE_OWORD_5(reg,
558 FRF_AB_MAC_XOFF_VAL, 0xffff /* max pause time */,
559 FRF_AB_MAC_BCAD_ACPT, 1,
560 FRF_AB_MAC_UC_PROM, efx->promiscuous,
561 FRF_AB_MAC_LINK_STATUS, 1, /* always set */
562 FRF_AB_MAC_SPEED, link_speed);
563 /* On B0, MAC backpressure can be disabled and packets get
565 if (efx_nic_rev(efx) >= EFX_REV_FALCON_B0) {
566 EFX_SET_OWORD_FIELD(reg, FRF_BB_TXFIFO_DRAIN_EN,
570 efx_writeo(efx, ®, FR_AB_MAC_CTRL);
572 /* Restore the multicast hash registers. */
573 falcon_push_multicast_hash(efx);
575 efx_reado(efx, ®, FR_AZ_RX_CFG);
576 /* Enable XOFF signal from RX FIFO (we enabled it during NIC
577 * initialisation but it may read back as 0) */
578 EFX_SET_OWORD_FIELD(reg, FRF_AZ_RX_XOFF_MAC_EN, 1);
579 /* Unisolate the MAC -> RX */
580 if (efx_nic_rev(efx) >= EFX_REV_FALCON_B0)
581 EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_INGR_EN, 1);
582 efx_writeo(efx, ®, FR_AZ_RX_CFG);
585 static void falcon_stats_request(struct efx_nic *efx)
587 struct falcon_nic_data *nic_data = efx->nic_data;
590 WARN_ON(nic_data->stats_pending);
591 WARN_ON(nic_data->stats_disable_count);
593 if (nic_data->stats_dma_done == NULL)
594 return; /* no mac selected */
596 *nic_data->stats_dma_done = FALCON_STATS_NOT_DONE;
597 nic_data->stats_pending = true;
598 wmb(); /* ensure done flag is clear */
600 /* Initiate DMA transfer of stats */
601 EFX_POPULATE_OWORD_2(reg,
602 FRF_AB_MAC_STAT_DMA_CMD, 1,
603 FRF_AB_MAC_STAT_DMA_ADR,
604 efx->stats_buffer.dma_addr);
605 efx_writeo(efx, ®, FR_AB_MAC_STAT_DMA);
607 mod_timer(&nic_data->stats_timer, round_jiffies_up(jiffies + HZ / 2));
610 static void falcon_stats_complete(struct efx_nic *efx)
612 struct falcon_nic_data *nic_data = efx->nic_data;
614 if (!nic_data->stats_pending)
617 nic_data->stats_pending = 0;
618 if (*nic_data->stats_dma_done == FALCON_STATS_DONE) {
619 rmb(); /* read the done flag before the stats */
620 efx->mac_op->update_stats(efx);
622 EFX_ERR(efx, "timed out waiting for statistics\n");
626 static void falcon_stats_timer_func(unsigned long context)
628 struct efx_nic *efx = (struct efx_nic *)context;
629 struct falcon_nic_data *nic_data = efx->nic_data;
631 spin_lock(&efx->stats_lock);
633 falcon_stats_complete(efx);
634 if (nic_data->stats_disable_count == 0)
635 falcon_stats_request(efx);
637 spin_unlock(&efx->stats_lock);
640 static void falcon_switch_mac(struct efx_nic *efx);
642 static bool falcon_loopback_link_poll(struct efx_nic *efx)
644 struct efx_link_state old_state = efx->link_state;
646 WARN_ON(!mutex_is_locked(&efx->mac_lock));
647 WARN_ON(!LOOPBACK_INTERNAL(efx));
649 efx->link_state.fd = true;
650 efx->link_state.fc = efx->wanted_fc;
651 efx->link_state.up = true;
653 if (efx->loopback_mode == LOOPBACK_GMAC)
654 efx->link_state.speed = 1000;
656 efx->link_state.speed = 10000;
658 return !efx_link_state_equal(&efx->link_state, &old_state);
661 static int falcon_reconfigure_port(struct efx_nic *efx)
665 WARN_ON(efx_nic_rev(efx) > EFX_REV_FALCON_B0);
667 /* Poll the PHY link state *before* reconfiguring it. This means we
668 * will pick up the correct speed (in loopback) to select the correct
671 if (LOOPBACK_INTERNAL(efx))
672 falcon_loopback_link_poll(efx);
674 efx->phy_op->poll(efx);
676 falcon_stop_nic_stats(efx);
677 falcon_deconfigure_mac_wrapper(efx);
679 falcon_switch_mac(efx);
681 efx->phy_op->reconfigure(efx);
682 rc = efx->mac_op->reconfigure(efx);
685 falcon_start_nic_stats(efx);
687 /* Synchronise efx->link_state with the kernel */
688 efx_link_status_changed(efx);
693 /**************************************************************************
695 * PHY access via GMII
697 **************************************************************************
700 /* Wait for GMII access to complete */
701 static int falcon_gmii_wait(struct efx_nic *efx)
706 /* wait upto 50ms - taken max from datasheet */
707 for (count = 0; count < 5000; count++) {
708 efx_reado(efx, &md_stat, FR_AB_MD_STAT);
709 if (EFX_OWORD_FIELD(md_stat, FRF_AB_MD_BSY) == 0) {
710 if (EFX_OWORD_FIELD(md_stat, FRF_AB_MD_LNFL) != 0 ||
711 EFX_OWORD_FIELD(md_stat, FRF_AB_MD_BSERR) != 0) {
712 EFX_ERR(efx, "error from GMII access "
714 EFX_OWORD_VAL(md_stat));
721 EFX_ERR(efx, "timed out waiting for GMII\n");
725 /* Write an MDIO register of a PHY connected to Falcon. */
726 static int falcon_mdio_write(struct net_device *net_dev,
727 int prtad, int devad, u16 addr, u16 value)
729 struct efx_nic *efx = netdev_priv(net_dev);
733 EFX_REGDUMP(efx, "writing MDIO %d register %d.%d with 0x%04x\n",
734 prtad, devad, addr, value);
736 mutex_lock(&efx->mdio_lock);
738 /* Check MDIO not currently being accessed */
739 rc = falcon_gmii_wait(efx);
743 /* Write the address/ID register */
744 EFX_POPULATE_OWORD_1(reg, FRF_AB_MD_PHY_ADR, addr);
745 efx_writeo(efx, ®, FR_AB_MD_PHY_ADR);
747 EFX_POPULATE_OWORD_2(reg, FRF_AB_MD_PRT_ADR, prtad,
748 FRF_AB_MD_DEV_ADR, devad);
749 efx_writeo(efx, ®, FR_AB_MD_ID);
752 EFX_POPULATE_OWORD_1(reg, FRF_AB_MD_TXD, value);
753 efx_writeo(efx, ®, FR_AB_MD_TXD);
755 EFX_POPULATE_OWORD_2(reg,
758 efx_writeo(efx, ®, FR_AB_MD_CS);
760 /* Wait for data to be written */
761 rc = falcon_gmii_wait(efx);
763 /* Abort the write operation */
764 EFX_POPULATE_OWORD_2(reg,
767 efx_writeo(efx, ®, FR_AB_MD_CS);
772 mutex_unlock(&efx->mdio_lock);
776 /* Read an MDIO register of a PHY connected to Falcon. */
777 static int falcon_mdio_read(struct net_device *net_dev,
778 int prtad, int devad, u16 addr)
780 struct efx_nic *efx = netdev_priv(net_dev);
784 mutex_lock(&efx->mdio_lock);
786 /* Check MDIO not currently being accessed */
787 rc = falcon_gmii_wait(efx);
791 EFX_POPULATE_OWORD_1(reg, FRF_AB_MD_PHY_ADR, addr);
792 efx_writeo(efx, ®, FR_AB_MD_PHY_ADR);
794 EFX_POPULATE_OWORD_2(reg, FRF_AB_MD_PRT_ADR, prtad,
795 FRF_AB_MD_DEV_ADR, devad);
796 efx_writeo(efx, ®, FR_AB_MD_ID);
798 /* Request data to be read */
799 EFX_POPULATE_OWORD_2(reg, FRF_AB_MD_RDC, 1, FRF_AB_MD_GC, 0);
800 efx_writeo(efx, ®, FR_AB_MD_CS);
802 /* Wait for data to become available */
803 rc = falcon_gmii_wait(efx);
805 efx_reado(efx, ®, FR_AB_MD_RXD);
806 rc = EFX_OWORD_FIELD(reg, FRF_AB_MD_RXD);
807 EFX_REGDUMP(efx, "read from MDIO %d register %d.%d, got %04x\n",
808 prtad, devad, addr, rc);
810 /* Abort the read operation */
811 EFX_POPULATE_OWORD_2(reg,
814 efx_writeo(efx, ®, FR_AB_MD_CS);
816 EFX_LOG(efx, "read from MDIO %d register %d.%d, got error %d\n",
817 prtad, devad, addr, rc);
821 mutex_unlock(&efx->mdio_lock);
825 static void falcon_clock_mac(struct efx_nic *efx)
828 efx_oword_t nic_stat;
830 /* Configure the NIC generated MAC clock correctly */
831 efx_reado(efx, &nic_stat, FR_AB_NIC_STAT);
832 strap_val = EFX_IS10G(efx) ? 5 : 3;
833 if (efx_nic_rev(efx) >= EFX_REV_FALCON_B0) {
834 EFX_SET_OWORD_FIELD(nic_stat, FRF_BB_EE_STRAP_EN, 1);
835 EFX_SET_OWORD_FIELD(nic_stat, FRF_BB_EE_STRAP, strap_val);
836 efx_writeo(efx, &nic_stat, FR_AB_NIC_STAT);
838 /* Falcon A1 does not support 1G/10G speed switching
839 * and must not be used with a PHY that does. */
840 BUG_ON(EFX_OWORD_FIELD(nic_stat, FRF_AB_STRAP_PINS) !=
845 static void falcon_switch_mac(struct efx_nic *efx)
847 struct efx_mac_operations *old_mac_op = efx->mac_op;
848 struct falcon_nic_data *nic_data = efx->nic_data;
849 unsigned int stats_done_offset;
851 WARN_ON(!mutex_is_locked(&efx->mac_lock));
852 WARN_ON(nic_data->stats_disable_count == 0);
854 efx->mac_op = (EFX_IS10G(efx) ?
855 &falcon_xmac_operations : &falcon_gmac_operations);
858 stats_done_offset = XgDmaDone_offset;
860 stats_done_offset = GDmaDone_offset;
861 nic_data->stats_dma_done = efx->stats_buffer.addr + stats_done_offset;
863 if (old_mac_op == efx->mac_op)
866 falcon_clock_mac(efx);
868 EFX_LOG(efx, "selected %cMAC\n", EFX_IS10G(efx) ? 'X' : 'G');
869 /* Not all macs support a mac-level link state */
870 efx->xmac_poll_required = false;
871 falcon_reset_macs(efx);
874 /* This call is responsible for hooking in the MAC and PHY operations */
875 static int falcon_probe_port(struct efx_nic *efx)
879 switch (efx->phy_type) {
880 case PHY_TYPE_SFX7101:
881 efx->phy_op = &falcon_sfx7101_phy_ops;
883 case PHY_TYPE_SFT9001A:
884 case PHY_TYPE_SFT9001B:
885 efx->phy_op = &falcon_sft9001_phy_ops;
887 case PHY_TYPE_QT2022C2:
888 case PHY_TYPE_QT2025C:
889 efx->phy_op = &falcon_qt202x_phy_ops;
892 EFX_ERR(efx, "Unknown PHY type %d\n",
897 /* Fill out MDIO structure and loopback modes */
898 efx->mdio.mdio_read = falcon_mdio_read;
899 efx->mdio.mdio_write = falcon_mdio_write;
900 rc = efx->phy_op->probe(efx);
904 /* Initial assumption */
905 efx->link_state.speed = 10000;
906 efx->link_state.fd = true;
908 /* Hardware flow ctrl. FalconA RX FIFO too small for pause generation */
909 if (efx_nic_rev(efx) >= EFX_REV_FALCON_B0)
910 efx->wanted_fc = EFX_FC_RX | EFX_FC_TX;
912 efx->wanted_fc = EFX_FC_RX;
913 if (efx->mdio.mmds & MDIO_DEVS_AN)
914 efx->wanted_fc |= EFX_FC_AUTO;
916 /* Allocate buffer for stats */
917 rc = efx_nic_alloc_buffer(efx, &efx->stats_buffer,
918 FALCON_MAC_STATS_SIZE);
921 EFX_LOG(efx, "stats buffer at %llx (virt %p phys %llx)\n",
922 (u64)efx->stats_buffer.dma_addr,
923 efx->stats_buffer.addr,
924 (u64)virt_to_phys(efx->stats_buffer.addr));
929 static void falcon_remove_port(struct efx_nic *efx)
931 efx->phy_op->remove(efx);
932 efx_nic_free_buffer(efx, &efx->stats_buffer);
935 /**************************************************************************
939 **************************************************************************/
942 falcon_read_nvram(struct efx_nic *efx, struct falcon_nvconfig *nvconfig_out)
944 struct falcon_nvconfig *nvconfig;
945 struct efx_spi_device *spi;
947 int rc, magic_num, struct_ver;
948 __le16 *word, *limit;
951 spi = efx->spi_flash ? efx->spi_flash : efx->spi_eeprom;
955 region = kmalloc(FALCON_NVCONFIG_END, GFP_KERNEL);
958 nvconfig = region + FALCON_NVCONFIG_OFFSET;
960 mutex_lock(&efx->spi_lock);
961 rc = falcon_spi_read(efx, spi, 0, FALCON_NVCONFIG_END, NULL, region);
962 mutex_unlock(&efx->spi_lock);
964 EFX_ERR(efx, "Failed to read %s\n",
965 efx->spi_flash ? "flash" : "EEPROM");
970 magic_num = le16_to_cpu(nvconfig->board_magic_num);
971 struct_ver = le16_to_cpu(nvconfig->board_struct_ver);
974 if (magic_num != FALCON_NVCONFIG_BOARD_MAGIC_NUM) {
975 EFX_ERR(efx, "NVRAM bad magic 0x%x\n", magic_num);
978 if (struct_ver < 2) {
979 EFX_ERR(efx, "NVRAM has ancient version 0x%x\n", struct_ver);
981 } else if (struct_ver < 4) {
982 word = &nvconfig->board_magic_num;
983 limit = (__le16 *) (nvconfig + 1);
986 limit = region + FALCON_NVCONFIG_END;
988 for (csum = 0; word < limit; ++word)
989 csum += le16_to_cpu(*word);
991 if (~csum & 0xffff) {
992 EFX_ERR(efx, "NVRAM has incorrect checksum\n");
998 memcpy(nvconfig_out, nvconfig, sizeof(*nvconfig));
1005 static int falcon_test_nvram(struct efx_nic *efx)
1007 return falcon_read_nvram(efx, NULL);
1010 static const struct efx_nic_register_test falcon_b0_register_tests[] = {
1012 EFX_OWORD32(0x0003FFFF, 0x0003FFFF, 0x0003FFFF, 0x0003FFFF) },
1014 EFX_OWORD32(0xFFFFFFFE, 0x00017FFF, 0x00000000, 0x00000000) },
1016 EFX_OWORD32(0x7FFF0037, 0x00000000, 0x00000000, 0x00000000) },
1017 { FR_AZ_TX_RESERVED,
1018 EFX_OWORD32(0xFFFEFE80, 0x1FFFFFFF, 0x020000FE, 0x007FFFFF) },
1020 EFX_OWORD32(0xFFFF0000, 0x00000000, 0x00000000, 0x00000000) },
1021 { FR_AZ_SRM_TX_DC_CFG,
1022 EFX_OWORD32(0x001FFFFF, 0x00000000, 0x00000000, 0x00000000) },
1024 EFX_OWORD32(0x0000000F, 0x00000000, 0x00000000, 0x00000000) },
1025 { FR_AZ_RX_DC_PF_WM,
1026 EFX_OWORD32(0x000003FF, 0x00000000, 0x00000000, 0x00000000) },
1028 EFX_OWORD32(0x00000FFF, 0x00000000, 0x00000000, 0x00000000) },
1030 EFX_OWORD32(0x00007337, 0x00000000, 0x00000000, 0x00000000) },
1032 EFX_OWORD32(0x00001F1F, 0x00000000, 0x00000000, 0x00000000) },
1034 EFX_OWORD32(0x00000C68, 0x00000000, 0x00000000, 0x00000000) },
1036 EFX_OWORD32(0x00080164, 0x00000000, 0x00000000, 0x00000000) },
1038 EFX_OWORD32(0x07100A0C, 0x00000000, 0x00000000, 0x00000000) },
1039 { FR_AB_XM_RX_PARAM,
1040 EFX_OWORD32(0x00001FF8, 0x00000000, 0x00000000, 0x00000000) },
1042 EFX_OWORD32(0xFFFF0001, 0x00000000, 0x00000000, 0x00000000) },
1044 EFX_OWORD32(0xFFFFFFFF, 0x00000000, 0x00000000, 0x00000000) },
1046 EFX_OWORD32(0x0003FF0F, 0x00000000, 0x00000000, 0x00000000) },
1049 static int falcon_b0_test_registers(struct efx_nic *efx)
1051 return efx_nic_test_registers(efx, falcon_b0_register_tests,
1052 ARRAY_SIZE(falcon_b0_register_tests));
1055 /**************************************************************************
1059 **************************************************************************
1062 /* Resets NIC to known state. This routine must be called in process
1063 * context and is allowed to sleep. */
1064 static int falcon_reset_hw(struct efx_nic *efx, enum reset_type method)
1066 struct falcon_nic_data *nic_data = efx->nic_data;
1067 efx_oword_t glb_ctl_reg_ker;
1070 EFX_LOG(efx, "performing %s hardware reset\n", RESET_TYPE(method));
1072 /* Initiate device reset */
1073 if (method == RESET_TYPE_WORLD) {
1074 rc = pci_save_state(efx->pci_dev);
1076 EFX_ERR(efx, "failed to backup PCI state of primary "
1077 "function prior to hardware reset\n");
1080 if (efx_nic_is_dual_func(efx)) {
1081 rc = pci_save_state(nic_data->pci_dev2);
1083 EFX_ERR(efx, "failed to backup PCI state of "
1084 "secondary function prior to "
1085 "hardware reset\n");
1090 EFX_POPULATE_OWORD_2(glb_ctl_reg_ker,
1091 FRF_AB_EXT_PHY_RST_DUR,
1092 FFE_AB_EXT_PHY_RST_DUR_10240US,
1095 EFX_POPULATE_OWORD_7(glb_ctl_reg_ker,
1096 /* exclude PHY from "invisible" reset */
1097 FRF_AB_EXT_PHY_RST_CTL,
1098 method == RESET_TYPE_INVISIBLE,
1099 /* exclude EEPROM/flash and PCIe */
1100 FRF_AB_PCIE_CORE_RST_CTL, 1,
1101 FRF_AB_PCIE_NSTKY_RST_CTL, 1,
1102 FRF_AB_PCIE_SD_RST_CTL, 1,
1103 FRF_AB_EE_RST_CTL, 1,
1104 FRF_AB_EXT_PHY_RST_DUR,
1105 FFE_AB_EXT_PHY_RST_DUR_10240US,
1108 efx_writeo(efx, &glb_ctl_reg_ker, FR_AB_GLB_CTL);
1110 EFX_LOG(efx, "waiting for hardware reset\n");
1111 schedule_timeout_uninterruptible(HZ / 20);
1113 /* Restore PCI configuration if needed */
1114 if (method == RESET_TYPE_WORLD) {
1115 if (efx_nic_is_dual_func(efx)) {
1116 rc = pci_restore_state(nic_data->pci_dev2);
1118 EFX_ERR(efx, "failed to restore PCI config for "
1119 "the secondary function\n");
1123 rc = pci_restore_state(efx->pci_dev);
1125 EFX_ERR(efx, "failed to restore PCI config for the "
1126 "primary function\n");
1129 EFX_LOG(efx, "successfully restored PCI config\n");
1132 /* Assert that reset complete */
1133 efx_reado(efx, &glb_ctl_reg_ker, FR_AB_GLB_CTL);
1134 if (EFX_OWORD_FIELD(glb_ctl_reg_ker, FRF_AB_SWRST) != 0) {
1136 EFX_ERR(efx, "timed out waiting for hardware reset\n");
1139 EFX_LOG(efx, "hardware reset complete\n");
1143 /* pci_save_state() and pci_restore_state() MUST be called in pairs */
1146 pci_restore_state(efx->pci_dev);
1153 static void falcon_monitor(struct efx_nic *efx)
1158 BUG_ON(!mutex_is_locked(&efx->mac_lock));
1160 rc = falcon_board(efx)->type->monitor(efx);
1162 EFX_ERR(efx, "Board sensor %s; shutting down PHY\n",
1163 (rc == -ERANGE) ? "reported fault" : "failed");
1164 efx->phy_mode |= PHY_MODE_LOW_POWER;
1165 rc = __efx_reconfigure_port(efx);
1169 if (LOOPBACK_INTERNAL(efx))
1170 link_changed = falcon_loopback_link_poll(efx);
1172 link_changed = efx->phy_op->poll(efx);
1175 falcon_stop_nic_stats(efx);
1176 falcon_deconfigure_mac_wrapper(efx);
1178 falcon_switch_mac(efx);
1179 rc = efx->mac_op->reconfigure(efx);
1182 falcon_start_nic_stats(efx);
1184 efx_link_status_changed(efx);
1188 falcon_poll_xmac(efx);
1191 /* Zeroes out the SRAM contents. This routine must be called in
1192 * process context and is allowed to sleep.
1194 static int falcon_reset_sram(struct efx_nic *efx)
1196 efx_oword_t srm_cfg_reg_ker, gpio_cfg_reg_ker;
1199 /* Set the SRAM wake/sleep GPIO appropriately. */
1200 efx_reado(efx, &gpio_cfg_reg_ker, FR_AB_GPIO_CTL);
1201 EFX_SET_OWORD_FIELD(gpio_cfg_reg_ker, FRF_AB_GPIO1_OEN, 1);
1202 EFX_SET_OWORD_FIELD(gpio_cfg_reg_ker, FRF_AB_GPIO1_OUT, 1);
1203 efx_writeo(efx, &gpio_cfg_reg_ker, FR_AB_GPIO_CTL);
1205 /* Initiate SRAM reset */
1206 EFX_POPULATE_OWORD_2(srm_cfg_reg_ker,
1207 FRF_AZ_SRM_INIT_EN, 1,
1208 FRF_AZ_SRM_NB_SZ, 0);
1209 efx_writeo(efx, &srm_cfg_reg_ker, FR_AZ_SRM_CFG);
1211 /* Wait for SRAM reset to complete */
1214 EFX_LOG(efx, "waiting for SRAM reset (attempt %d)...\n", count);
1216 /* SRAM reset is slow; expect around 16ms */
1217 schedule_timeout_uninterruptible(HZ / 50);
1219 /* Check for reset complete */
1220 efx_reado(efx, &srm_cfg_reg_ker, FR_AZ_SRM_CFG);
1221 if (!EFX_OWORD_FIELD(srm_cfg_reg_ker, FRF_AZ_SRM_INIT_EN)) {
1222 EFX_LOG(efx, "SRAM reset complete\n");
1226 } while (++count < 20); /* wait upto 0.4 sec */
1228 EFX_ERR(efx, "timed out waiting for SRAM reset\n");
1232 static int falcon_spi_device_init(struct efx_nic *efx,
1233 struct efx_spi_device **spi_device_ret,
1234 unsigned int device_id, u32 device_type)
1236 struct efx_spi_device *spi_device;
1238 if (device_type != 0) {
1239 spi_device = kzalloc(sizeof(*spi_device), GFP_KERNEL);
1242 spi_device->device_id = device_id;
1244 1 << SPI_DEV_TYPE_FIELD(device_type, SPI_DEV_TYPE_SIZE);
1245 spi_device->addr_len =
1246 SPI_DEV_TYPE_FIELD(device_type, SPI_DEV_TYPE_ADDR_LEN);
1247 spi_device->munge_address = (spi_device->size == 1 << 9 &&
1248 spi_device->addr_len == 1);
1249 spi_device->erase_command =
1250 SPI_DEV_TYPE_FIELD(device_type, SPI_DEV_TYPE_ERASE_CMD);
1251 spi_device->erase_size =
1252 1 << SPI_DEV_TYPE_FIELD(device_type,
1253 SPI_DEV_TYPE_ERASE_SIZE);
1254 spi_device->block_size =
1255 1 << SPI_DEV_TYPE_FIELD(device_type,
1256 SPI_DEV_TYPE_BLOCK_SIZE);
1261 kfree(*spi_device_ret);
1262 *spi_device_ret = spi_device;
1266 static void falcon_remove_spi_devices(struct efx_nic *efx)
1268 kfree(efx->spi_eeprom);
1269 efx->spi_eeprom = NULL;
1270 kfree(efx->spi_flash);
1271 efx->spi_flash = NULL;
1274 /* Extract non-volatile configuration */
1275 static int falcon_probe_nvconfig(struct efx_nic *efx)
1277 struct falcon_nvconfig *nvconfig;
1281 nvconfig = kmalloc(sizeof(*nvconfig), GFP_KERNEL);
1285 rc = falcon_read_nvram(efx, nvconfig);
1286 if (rc == -EINVAL) {
1287 EFX_ERR(efx, "NVRAM is invalid therefore using defaults\n");
1288 efx->phy_type = PHY_TYPE_NONE;
1289 efx->mdio.prtad = MDIO_PRTAD_NONE;
1295 struct falcon_nvconfig_board_v2 *v2 = &nvconfig->board_v2;
1296 struct falcon_nvconfig_board_v3 *v3 = &nvconfig->board_v3;
1298 efx->phy_type = v2->port0_phy_type;
1299 efx->mdio.prtad = v2->port0_phy_addr;
1300 board_rev = le16_to_cpu(v2->board_revision);
1302 if (le16_to_cpu(nvconfig->board_struct_ver) >= 3) {
1303 rc = falcon_spi_device_init(
1304 efx, &efx->spi_flash, FFE_AB_SPI_DEVICE_FLASH,
1305 le32_to_cpu(v3->spi_device_type
1306 [FFE_AB_SPI_DEVICE_FLASH]));
1309 rc = falcon_spi_device_init(
1310 efx, &efx->spi_eeprom, FFE_AB_SPI_DEVICE_EEPROM,
1311 le32_to_cpu(v3->spi_device_type
1312 [FFE_AB_SPI_DEVICE_EEPROM]));
1318 /* Read the MAC addresses */
1319 memcpy(efx->mac_address, nvconfig->mac_address[0], ETH_ALEN);
1321 EFX_LOG(efx, "PHY is %d phy_id %d\n", efx->phy_type, efx->mdio.prtad);
1323 falcon_probe_board(efx, board_rev);
1329 falcon_remove_spi_devices(efx);
1335 /* Probe all SPI devices on the NIC */
1336 static void falcon_probe_spi_devices(struct efx_nic *efx)
1338 efx_oword_t nic_stat, gpio_ctl, ee_vpd_cfg;
1341 efx_reado(efx, &gpio_ctl, FR_AB_GPIO_CTL);
1342 efx_reado(efx, &nic_stat, FR_AB_NIC_STAT);
1343 efx_reado(efx, &ee_vpd_cfg, FR_AB_EE_VPD_CFG0);
1345 if (EFX_OWORD_FIELD(gpio_ctl, FRF_AB_GPIO3_PWRUP_VALUE)) {
1346 boot_dev = (EFX_OWORD_FIELD(nic_stat, FRF_AB_SF_PRST) ?
1347 FFE_AB_SPI_DEVICE_FLASH : FFE_AB_SPI_DEVICE_EEPROM);
1348 EFX_LOG(efx, "Booted from %s\n",
1349 boot_dev == FFE_AB_SPI_DEVICE_FLASH ? "flash" : "EEPROM");
1351 /* Disable VPD and set clock dividers to safe
1352 * values for initial programming. */
1354 EFX_LOG(efx, "Booted from internal ASIC settings;"
1355 " setting SPI config\n");
1356 EFX_POPULATE_OWORD_3(ee_vpd_cfg, FRF_AB_EE_VPD_EN, 0,
1357 /* 125 MHz / 7 ~= 20 MHz */
1358 FRF_AB_EE_SF_CLOCK_DIV, 7,
1359 /* 125 MHz / 63 ~= 2 MHz */
1360 FRF_AB_EE_EE_CLOCK_DIV, 63);
1361 efx_writeo(efx, &ee_vpd_cfg, FR_AB_EE_VPD_CFG0);
1364 if (boot_dev == FFE_AB_SPI_DEVICE_FLASH)
1365 falcon_spi_device_init(efx, &efx->spi_flash,
1366 FFE_AB_SPI_DEVICE_FLASH,
1367 default_flash_type);
1368 if (boot_dev == FFE_AB_SPI_DEVICE_EEPROM)
1369 falcon_spi_device_init(efx, &efx->spi_eeprom,
1370 FFE_AB_SPI_DEVICE_EEPROM,
1374 static int falcon_probe_nic(struct efx_nic *efx)
1376 struct falcon_nic_data *nic_data;
1377 struct falcon_board *board;
1380 /* Allocate storage for hardware specific data */
1381 nic_data = kzalloc(sizeof(*nic_data), GFP_KERNEL);
1384 efx->nic_data = nic_data;
1388 if (efx_nic_fpga_ver(efx) != 0) {
1389 EFX_ERR(efx, "Falcon FPGA not supported\n");
1393 if (efx_nic_rev(efx) <= EFX_REV_FALCON_A1) {
1394 efx_oword_t nic_stat;
1395 struct pci_dev *dev;
1396 u8 pci_rev = efx->pci_dev->revision;
1398 if ((pci_rev == 0xff) || (pci_rev == 0)) {
1399 EFX_ERR(efx, "Falcon rev A0 not supported\n");
1402 efx_reado(efx, &nic_stat, FR_AB_NIC_STAT);
1403 if (EFX_OWORD_FIELD(nic_stat, FRF_AB_STRAP_10G) == 0) {
1404 EFX_ERR(efx, "Falcon rev A1 1G not supported\n");
1407 if (EFX_OWORD_FIELD(nic_stat, FRF_AA_STRAP_PCIE) == 0) {
1408 EFX_ERR(efx, "Falcon rev A1 PCI-X not supported\n");
1412 dev = pci_dev_get(efx->pci_dev);
1413 while ((dev = pci_get_device(EFX_VENDID_SFC, FALCON_A_S_DEVID,
1415 if (dev->bus == efx->pci_dev->bus &&
1416 dev->devfn == efx->pci_dev->devfn + 1) {
1417 nic_data->pci_dev2 = dev;
1421 if (!nic_data->pci_dev2) {
1422 EFX_ERR(efx, "failed to find secondary function\n");
1428 /* Now we can reset the NIC */
1429 rc = falcon_reset_hw(efx, RESET_TYPE_ALL);
1431 EFX_ERR(efx, "failed to reset NIC\n");
1435 /* Allocate memory for INT_KER */
1436 rc = efx_nic_alloc_buffer(efx, &efx->irq_status, sizeof(efx_oword_t));
1439 BUG_ON(efx->irq_status.dma_addr & 0x0f);
1441 EFX_LOG(efx, "INT_KER at %llx (virt %p phys %llx)\n",
1442 (u64)efx->irq_status.dma_addr,
1443 efx->irq_status.addr, (u64)virt_to_phys(efx->irq_status.addr));
1445 falcon_probe_spi_devices(efx);
1447 /* Read in the non-volatile configuration */
1448 rc = falcon_probe_nvconfig(efx);
1452 /* Initialise I2C adapter */
1453 board = falcon_board(efx);
1454 board->i2c_adap.owner = THIS_MODULE;
1455 board->i2c_data = falcon_i2c_bit_operations;
1456 board->i2c_data.data = efx;
1457 board->i2c_adap.algo_data = &board->i2c_data;
1458 board->i2c_adap.dev.parent = &efx->pci_dev->dev;
1459 strlcpy(board->i2c_adap.name, "SFC4000 GPIO",
1460 sizeof(board->i2c_adap.name));
1461 rc = i2c_bit_add_bus(&board->i2c_adap);
1465 rc = falcon_board(efx)->type->init(efx);
1467 EFX_ERR(efx, "failed to initialise board\n");
1471 nic_data->stats_disable_count = 1;
1472 setup_timer(&nic_data->stats_timer, &falcon_stats_timer_func,
1473 (unsigned long)efx);
1478 BUG_ON(i2c_del_adapter(&board->i2c_adap));
1479 memset(&board->i2c_adap, 0, sizeof(board->i2c_adap));
1481 falcon_remove_spi_devices(efx);
1482 efx_nic_free_buffer(efx, &efx->irq_status);
1485 if (nic_data->pci_dev2) {
1486 pci_dev_put(nic_data->pci_dev2);
1487 nic_data->pci_dev2 = NULL;
1491 kfree(efx->nic_data);
1495 static void falcon_init_rx_cfg(struct efx_nic *efx)
1497 /* Prior to Siena the RX DMA engine will split each frame at
1498 * intervals of RX_USR_BUF_SIZE (32-byte units). We set it to
1499 * be so large that that never happens. */
1500 const unsigned huge_buf_size = (3 * 4096) >> 5;
1501 /* RX control FIFO thresholds (32 entries) */
1502 const unsigned ctrl_xon_thr = 20;
1503 const unsigned ctrl_xoff_thr = 25;
1504 /* RX data FIFO thresholds (256-byte units; size varies) */
1505 int data_xon_thr = efx_nic_rx_xon_thresh >> 8;
1506 int data_xoff_thr = efx_nic_rx_xoff_thresh >> 8;
1509 efx_reado(efx, ®, FR_AZ_RX_CFG);
1510 if (efx_nic_rev(efx) <= EFX_REV_FALCON_A1) {
1511 /* Data FIFO size is 5.5K */
1512 if (data_xon_thr < 0)
1513 data_xon_thr = 512 >> 8;
1514 if (data_xoff_thr < 0)
1515 data_xoff_thr = 2048 >> 8;
1516 EFX_SET_OWORD_FIELD(reg, FRF_AA_RX_DESC_PUSH_EN, 0);
1517 EFX_SET_OWORD_FIELD(reg, FRF_AA_RX_USR_BUF_SIZE,
1519 EFX_SET_OWORD_FIELD(reg, FRF_AA_RX_XON_MAC_TH, data_xon_thr);
1520 EFX_SET_OWORD_FIELD(reg, FRF_AA_RX_XOFF_MAC_TH, data_xoff_thr);
1521 EFX_SET_OWORD_FIELD(reg, FRF_AA_RX_XON_TX_TH, ctrl_xon_thr);
1522 EFX_SET_OWORD_FIELD(reg, FRF_AA_RX_XOFF_TX_TH, ctrl_xoff_thr);
1524 /* Data FIFO size is 80K; register fields moved */
1525 if (data_xon_thr < 0)
1526 data_xon_thr = 27648 >> 8; /* ~3*max MTU */
1527 if (data_xoff_thr < 0)
1528 data_xoff_thr = 54272 >> 8; /* ~80Kb - 3*max MTU */
1529 EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_DESC_PUSH_EN, 0);
1530 EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_USR_BUF_SIZE,
1532 EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_XON_MAC_TH, data_xon_thr);
1533 EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_XOFF_MAC_TH, data_xoff_thr);
1534 EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_XON_TX_TH, ctrl_xon_thr);
1535 EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_XOFF_TX_TH, ctrl_xoff_thr);
1536 EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_INGR_EN, 1);
1538 /* Always enable XOFF signal from RX FIFO. We enable
1539 * or disable transmission of pause frames at the MAC. */
1540 EFX_SET_OWORD_FIELD(reg, FRF_AZ_RX_XOFF_MAC_EN, 1);
1541 efx_writeo(efx, ®, FR_AZ_RX_CFG);
1544 /* This call performs hardware-specific global initialisation, such as
1545 * defining the descriptor cache sizes and number of RSS channels.
1546 * It does not set up any buffers, descriptor rings or event queues.
1548 static int falcon_init_nic(struct efx_nic *efx)
1553 /* Use on-chip SRAM */
1554 efx_reado(efx, &temp, FR_AB_NIC_STAT);
1555 EFX_SET_OWORD_FIELD(temp, FRF_AB_ONCHIP_SRAM, 1);
1556 efx_writeo(efx, &temp, FR_AB_NIC_STAT);
1558 /* Set the source of the GMAC clock */
1559 if (efx_nic_rev(efx) == EFX_REV_FALCON_B0) {
1560 efx_reado(efx, &temp, FR_AB_GPIO_CTL);
1561 EFX_SET_OWORD_FIELD(temp, FRF_AB_USE_NIC_CLK, true);
1562 efx_writeo(efx, &temp, FR_AB_GPIO_CTL);
1565 /* Select the correct MAC */
1566 falcon_clock_mac(efx);
1568 rc = falcon_reset_sram(efx);
1572 /* Clear the parity enables on the TX data fifos as
1573 * they produce false parity errors because of timing issues
1575 if (EFX_WORKAROUND_5129(efx)) {
1576 efx_reado(efx, &temp, FR_AZ_CSR_SPARE);
1577 EFX_SET_OWORD_FIELD(temp, FRF_AB_MEM_PERR_EN_TX_DATA, 0);
1578 efx_writeo(efx, &temp, FR_AZ_CSR_SPARE);
1581 if (EFX_WORKAROUND_7244(efx)) {
1582 efx_reado(efx, &temp, FR_BZ_RX_FILTER_CTL);
1583 EFX_SET_OWORD_FIELD(temp, FRF_BZ_UDP_FULL_SRCH_LIMIT, 8);
1584 EFX_SET_OWORD_FIELD(temp, FRF_BZ_UDP_WILD_SRCH_LIMIT, 8);
1585 EFX_SET_OWORD_FIELD(temp, FRF_BZ_TCP_FULL_SRCH_LIMIT, 8);
1586 EFX_SET_OWORD_FIELD(temp, FRF_BZ_TCP_WILD_SRCH_LIMIT, 8);
1587 efx_writeo(efx, &temp, FR_BZ_RX_FILTER_CTL);
1590 /* XXX This is documented only for Falcon A0/A1 */
1591 /* Setup RX. Wait for descriptor is broken and must
1592 * be disabled. RXDP recovery shouldn't be needed, but is.
1594 efx_reado(efx, &temp, FR_AA_RX_SELF_RST);
1595 EFX_SET_OWORD_FIELD(temp, FRF_AA_RX_NODESC_WAIT_DIS, 1);
1596 EFX_SET_OWORD_FIELD(temp, FRF_AA_RX_SELF_RST_EN, 1);
1597 if (EFX_WORKAROUND_5583(efx))
1598 EFX_SET_OWORD_FIELD(temp, FRF_AA_RX_ISCSI_DIS, 1);
1599 efx_writeo(efx, &temp, FR_AA_RX_SELF_RST);
1601 /* Do not enable TX_NO_EOP_DISC_EN, since it limits packets to 16
1602 * descriptors (which is bad).
1604 efx_reado(efx, &temp, FR_AZ_TX_CFG);
1605 EFX_SET_OWORD_FIELD(temp, FRF_AZ_TX_NO_EOP_DISC_EN, 0);
1606 efx_writeo(efx, &temp, FR_AZ_TX_CFG);
1608 falcon_init_rx_cfg(efx);
1610 /* Set destination of both TX and RX Flush events */
1611 if (efx_nic_rev(efx) >= EFX_REV_FALCON_B0) {
1612 EFX_POPULATE_OWORD_1(temp, FRF_BZ_FLS_EVQ_ID, 0);
1613 efx_writeo(efx, &temp, FR_BZ_DP_CTRL);
1616 efx_nic_init_common(efx);
1621 static void falcon_remove_nic(struct efx_nic *efx)
1623 struct falcon_nic_data *nic_data = efx->nic_data;
1624 struct falcon_board *board = falcon_board(efx);
1627 board->type->fini(efx);
1629 /* Remove I2C adapter and clear it in preparation for a retry */
1630 rc = i2c_del_adapter(&board->i2c_adap);
1632 memset(&board->i2c_adap, 0, sizeof(board->i2c_adap));
1634 falcon_remove_spi_devices(efx);
1635 efx_nic_free_buffer(efx, &efx->irq_status);
1637 falcon_reset_hw(efx, RESET_TYPE_ALL);
1639 /* Release the second function after the reset */
1640 if (nic_data->pci_dev2) {
1641 pci_dev_put(nic_data->pci_dev2);
1642 nic_data->pci_dev2 = NULL;
1645 /* Tear down the private nic state */
1646 kfree(efx->nic_data);
1647 efx->nic_data = NULL;
1650 static void falcon_update_nic_stats(struct efx_nic *efx)
1652 struct falcon_nic_data *nic_data = efx->nic_data;
1655 if (nic_data->stats_disable_count)
1658 efx_reado(efx, &cnt, FR_AZ_RX_NODESC_DROP);
1659 efx->n_rx_nodesc_drop_cnt +=
1660 EFX_OWORD_FIELD(cnt, FRF_AB_RX_NODESC_DROP_CNT);
1662 if (nic_data->stats_pending &&
1663 *nic_data->stats_dma_done == FALCON_STATS_DONE) {
1664 nic_data->stats_pending = false;
1665 rmb(); /* read the done flag before the stats */
1666 efx->mac_op->update_stats(efx);
1670 void falcon_start_nic_stats(struct efx_nic *efx)
1672 struct falcon_nic_data *nic_data = efx->nic_data;
1674 spin_lock_bh(&efx->stats_lock);
1675 if (--nic_data->stats_disable_count == 0)
1676 falcon_stats_request(efx);
1677 spin_unlock_bh(&efx->stats_lock);
1680 void falcon_stop_nic_stats(struct efx_nic *efx)
1682 struct falcon_nic_data *nic_data = efx->nic_data;
1687 spin_lock_bh(&efx->stats_lock);
1688 ++nic_data->stats_disable_count;
1689 spin_unlock_bh(&efx->stats_lock);
1691 del_timer_sync(&nic_data->stats_timer);
1693 /* Wait enough time for the most recent transfer to
1695 for (i = 0; i < 4 && nic_data->stats_pending; i++) {
1696 if (*nic_data->stats_dma_done == FALCON_STATS_DONE)
1701 spin_lock_bh(&efx->stats_lock);
1702 falcon_stats_complete(efx);
1703 spin_unlock_bh(&efx->stats_lock);
1706 static void falcon_set_id_led(struct efx_nic *efx, enum efx_led_mode mode)
1708 falcon_board(efx)->type->set_id_led(efx, mode);
1711 /**************************************************************************
1715 **************************************************************************
1718 static void falcon_get_wol(struct efx_nic *efx, struct ethtool_wolinfo *wol)
1722 memset(&wol->sopass, 0, sizeof(wol->sopass));
1725 static int falcon_set_wol(struct efx_nic *efx, u32 type)
1732 /**************************************************************************
1734 * Revision-dependent attributes used by efx.c and nic.c
1736 **************************************************************************
1739 struct efx_nic_type falcon_a1_nic_type = {
1740 .probe = falcon_probe_nic,
1741 .remove = falcon_remove_nic,
1742 .init = falcon_init_nic,
1743 .fini = efx_port_dummy_op_void,
1744 .monitor = falcon_monitor,
1745 .reset = falcon_reset_hw,
1746 .probe_port = falcon_probe_port,
1747 .remove_port = falcon_remove_port,
1748 .prepare_flush = falcon_prepare_flush,
1749 .update_stats = falcon_update_nic_stats,
1750 .start_stats = falcon_start_nic_stats,
1751 .stop_stats = falcon_stop_nic_stats,
1752 .set_id_led = falcon_set_id_led,
1753 .push_irq_moderation = falcon_push_irq_moderation,
1754 .push_multicast_hash = falcon_push_multicast_hash,
1755 .reconfigure_port = falcon_reconfigure_port,
1756 .get_wol = falcon_get_wol,
1757 .set_wol = falcon_set_wol,
1758 .resume_wol = efx_port_dummy_op_void,
1759 .test_nvram = falcon_test_nvram,
1760 .default_mac_ops = &falcon_xmac_operations,
1762 .revision = EFX_REV_FALCON_A1,
1763 .mem_map_size = 0x20000,
1764 .txd_ptr_tbl_base = FR_AA_TX_DESC_PTR_TBL_KER,
1765 .rxd_ptr_tbl_base = FR_AA_RX_DESC_PTR_TBL_KER,
1766 .buf_tbl_base = FR_AA_BUF_FULL_TBL_KER,
1767 .evq_ptr_tbl_base = FR_AA_EVQ_PTR_TBL_KER,
1768 .evq_rptr_tbl_base = FR_AA_EVQ_RPTR_KER,
1769 .max_dma_mask = DMA_BIT_MASK(FSF_AZ_TX_KER_BUF_ADDR_WIDTH),
1770 .rx_buffer_padding = 0x24,
1771 .max_interrupt_mode = EFX_INT_MODE_MSI,
1772 .phys_addr_channels = 4,
1773 .tx_dc_base = 0x130000,
1774 .rx_dc_base = 0x100000,
1775 .offload_features = NETIF_F_IP_CSUM,
1776 .reset_world_flags = ETH_RESET_IRQ,
1779 struct efx_nic_type falcon_b0_nic_type = {
1780 .probe = falcon_probe_nic,
1781 .remove = falcon_remove_nic,
1782 .init = falcon_init_nic,
1783 .fini = efx_port_dummy_op_void,
1784 .monitor = falcon_monitor,
1785 .reset = falcon_reset_hw,
1786 .probe_port = falcon_probe_port,
1787 .remove_port = falcon_remove_port,
1788 .prepare_flush = falcon_prepare_flush,
1789 .update_stats = falcon_update_nic_stats,
1790 .start_stats = falcon_start_nic_stats,
1791 .stop_stats = falcon_stop_nic_stats,
1792 .set_id_led = falcon_set_id_led,
1793 .push_irq_moderation = falcon_push_irq_moderation,
1794 .push_multicast_hash = falcon_push_multicast_hash,
1795 .reconfigure_port = falcon_reconfigure_port,
1796 .get_wol = falcon_get_wol,
1797 .set_wol = falcon_set_wol,
1798 .resume_wol = efx_port_dummy_op_void,
1799 .test_registers = falcon_b0_test_registers,
1800 .test_nvram = falcon_test_nvram,
1801 .default_mac_ops = &falcon_xmac_operations,
1803 .revision = EFX_REV_FALCON_B0,
1804 /* Map everything up to and including the RSS indirection
1805 * table. Don't map MSI-X table, MSI-X PBA since Linux
1806 * requires that they not be mapped. */
1807 .mem_map_size = (FR_BZ_RX_INDIRECTION_TBL +
1808 FR_BZ_RX_INDIRECTION_TBL_STEP *
1809 FR_BZ_RX_INDIRECTION_TBL_ROWS),
1810 .txd_ptr_tbl_base = FR_BZ_TX_DESC_PTR_TBL,
1811 .rxd_ptr_tbl_base = FR_BZ_RX_DESC_PTR_TBL,
1812 .buf_tbl_base = FR_BZ_BUF_FULL_TBL,
1813 .evq_ptr_tbl_base = FR_BZ_EVQ_PTR_TBL,
1814 .evq_rptr_tbl_base = FR_BZ_EVQ_RPTR,
1815 .max_dma_mask = DMA_BIT_MASK(FSF_AZ_TX_KER_BUF_ADDR_WIDTH),
1816 .rx_buffer_padding = 0,
1817 .max_interrupt_mode = EFX_INT_MODE_MSIX,
1818 .phys_addr_channels = 32, /* Hardware limit is 64, but the legacy
1819 * interrupt handler only supports 32
1821 .tx_dc_base = 0x130000,
1822 .rx_dc_base = 0x100000,
1823 .offload_features = NETIF_F_IP_CSUM,
1824 .reset_world_flags = ETH_RESET_IRQ,