diff options
Diffstat (limited to 'drivers/net/ethernet/sfc/falcon.c')
| -rw-r--r-- | drivers/net/ethernet/sfc/falcon.c | 1843 |
1 files changed, 1843 insertions, 0 deletions
diff --git a/drivers/net/ethernet/sfc/falcon.c b/drivers/net/ethernet/sfc/falcon.c new file mode 100644 index 000000000000..4dd1748a19c6 --- /dev/null +++ b/drivers/net/ethernet/sfc/falcon.c @@ -0,0 +1,1843 @@ +/**************************************************************************** + * Driver for Solarflare Solarstorm network controllers and boards + * Copyright 2005-2006 Fen Systems Ltd. + * Copyright 2006-2010 Solarflare Communications Inc. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation, incorporated herein by reference. + */ + +#include <linux/bitops.h> +#include <linux/delay.h> +#include <linux/pci.h> +#include <linux/module.h> +#include <linux/seq_file.h> +#include <linux/i2c.h> +#include <linux/mii.h> +#include <linux/slab.h> +#include "net_driver.h" +#include "bitfield.h" +#include "efx.h" +#include "mac.h" +#include "spi.h" +#include "nic.h" +#include "regs.h" +#include "io.h" +#include "phy.h" +#include "workarounds.h" + +/* Hardware control for SFC4000 (aka Falcon). */ + +static const unsigned int +/* "Large" EEPROM device: Atmel AT25640 or similar + * 8 KB, 16-bit address, 32 B write block */ +large_eeprom_type = ((13 << SPI_DEV_TYPE_SIZE_LBN) + | (2 << SPI_DEV_TYPE_ADDR_LEN_LBN) + | (5 << SPI_DEV_TYPE_BLOCK_SIZE_LBN)), +/* Default flash device: Atmel AT25F1024 + * 128 KB, 24-bit address, 32 KB erase block, 256 B write block */ +default_flash_type = ((17 << SPI_DEV_TYPE_SIZE_LBN) + | (3 << SPI_DEV_TYPE_ADDR_LEN_LBN) + | (0x52 << SPI_DEV_TYPE_ERASE_CMD_LBN) + | (15 << SPI_DEV_TYPE_ERASE_SIZE_LBN) + | (8 << SPI_DEV_TYPE_BLOCK_SIZE_LBN)); + +/************************************************************************** + * + * I2C bus - this is a bit-bashing interface using GPIO pins + * Note that it uses the output enables to tristate the outputs + * SDA is the data pin and SCL is the clock + * + ************************************************************************** + */ +static void falcon_setsda(void *data, int state) +{ + struct efx_nic *efx = (struct efx_nic *)data; + efx_oword_t reg; + + efx_reado(efx, ®, FR_AB_GPIO_CTL); + EFX_SET_OWORD_FIELD(reg, FRF_AB_GPIO3_OEN, !state); + efx_writeo(efx, ®, FR_AB_GPIO_CTL); +} + +static void falcon_setscl(void *data, int state) +{ + struct efx_nic *efx = (struct efx_nic *)data; + efx_oword_t reg; + + efx_reado(efx, ®, FR_AB_GPIO_CTL); + EFX_SET_OWORD_FIELD(reg, FRF_AB_GPIO0_OEN, !state); + efx_writeo(efx, ®, FR_AB_GPIO_CTL); +} + +static int falcon_getsda(void *data) +{ + struct efx_nic *efx = (struct efx_nic *)data; + efx_oword_t reg; + + efx_reado(efx, ®, FR_AB_GPIO_CTL); + return EFX_OWORD_FIELD(reg, FRF_AB_GPIO3_IN); +} + +static int falcon_getscl(void *data) +{ + struct efx_nic *efx = (struct efx_nic *)data; + efx_oword_t reg; + + efx_reado(efx, ®, FR_AB_GPIO_CTL); + return EFX_OWORD_FIELD(reg, FRF_AB_GPIO0_IN); +} + +static struct i2c_algo_bit_data falcon_i2c_bit_operations = { + .setsda = falcon_setsda, + .setscl = falcon_setscl, + .getsda = falcon_getsda, + .getscl = falcon_getscl, + .udelay = 5, + /* Wait up to 50 ms for slave to let us pull SCL high */ + .timeout = DIV_ROUND_UP(HZ, 20), +}; + +static void falcon_push_irq_moderation(struct efx_channel *channel) +{ + efx_dword_t timer_cmd; + struct efx_nic *efx = channel->efx; + + BUILD_BUG_ON(EFX_IRQ_MOD_MAX > (1 << FRF_AB_TC_TIMER_VAL_WIDTH)); + + /* Set timer register */ + if (channel->irq_moderation) { + EFX_POPULATE_DWORD_2(timer_cmd, + FRF_AB_TC_TIMER_MODE, + FFE_BB_TIMER_MODE_INT_HLDOFF, + FRF_AB_TC_TIMER_VAL, + channel->irq_moderation - 1); + } else { + EFX_POPULATE_DWORD_2(timer_cmd, + FRF_AB_TC_TIMER_MODE, + FFE_BB_TIMER_MODE_DIS, + FRF_AB_TC_TIMER_VAL, 0); + } + BUILD_BUG_ON(FR_AA_TIMER_COMMAND_KER != FR_BZ_TIMER_COMMAND_P0); + efx_writed_page_locked(efx, &timer_cmd, FR_BZ_TIMER_COMMAND_P0, + channel->channel); +} + +static void falcon_deconfigure_mac_wrapper(struct efx_nic *efx); + +static void falcon_prepare_flush(struct efx_nic *efx) +{ + falcon_deconfigure_mac_wrapper(efx); + + /* Wait for the tx and rx fifo's to get to the next packet boundary + * (~1ms without back-pressure), then to drain the remainder of the + * fifo's at data path speeds (negligible), with a healthy margin. */ + msleep(10); +} + +/* Acknowledge a legacy interrupt from Falcon + * + * This acknowledges a legacy (not MSI) interrupt via INT_ACK_KER_REG. + * + * Due to SFC bug 3706 (silicon revision <=A1) reads can be duplicated in the + * BIU. Interrupt acknowledge is read sensitive so must write instead + * (then read to ensure the BIU collector is flushed) + * + * NB most hardware supports MSI interrupts + */ +inline void falcon_irq_ack_a1(struct efx_nic *efx) +{ + efx_dword_t reg; + + EFX_POPULATE_DWORD_1(reg, FRF_AA_INT_ACK_KER_FIELD, 0xb7eb7e); + efx_writed(efx, ®, FR_AA_INT_ACK_KER); + efx_readd(efx, ®, FR_AA_WORK_AROUND_BROKEN_PCI_READS); +} + + +irqreturn_t falcon_legacy_interrupt_a1(int irq, void *dev_id) +{ + struct efx_nic *efx = dev_id; + efx_oword_t *int_ker = efx->irq_status.addr; + int syserr; + int queues; + + /* Check to see if this is our interrupt. If it isn't, we + * exit without having touched the hardware. + */ + if (unlikely(EFX_OWORD_IS_ZERO(*int_ker))) { + netif_vdbg(efx, intr, efx->net_dev, + "IRQ %d on CPU %d not for me\n", irq, + raw_smp_processor_id()); + return IRQ_NONE; + } + efx->last_irq_cpu = raw_smp_processor_id(); + netif_vdbg(efx, intr, efx->net_dev, + "IRQ %d on CPU %d status " EFX_OWORD_FMT "\n", + irq, raw_smp_processor_id(), EFX_OWORD_VAL(*int_ker)); + + /* Determine interrupting queues, clear interrupt status + * register and acknowledge the device interrupt. + */ + BUILD_BUG_ON(FSF_AZ_NET_IVEC_INT_Q_WIDTH > EFX_MAX_CHANNELS); + queues = EFX_OWORD_FIELD(*int_ker, FSF_AZ_NET_IVEC_INT_Q); + + /* Check to see if we have a serious error condition */ + if (queues & (1U << efx->fatal_irq_level)) { + syserr = EFX_OWORD_FIELD(*int_ker, FSF_AZ_NET_IVEC_FATAL_INT); + if (unlikely(syserr)) + return efx_nic_fatal_interrupt(efx); + } + + EFX_ZERO_OWORD(*int_ker); + wmb(); /* Ensure the vector is cleared before interrupt ack */ + falcon_irq_ack_a1(efx); + + if (queues & 1) + efx_schedule_channel(efx_get_channel(efx, 0)); + if (queues & 2) + efx_schedule_channel(efx_get_channel(efx, 1)); + return IRQ_HANDLED; +} +/************************************************************************** + * + * EEPROM/flash + * + ************************************************************************** + */ + +#define FALCON_SPI_MAX_LEN sizeof(efx_oword_t) + +static int falcon_spi_poll(struct efx_nic *efx) +{ + efx_oword_t reg; + efx_reado(efx, ®, FR_AB_EE_SPI_HCMD); + return EFX_OWORD_FIELD(reg, FRF_AB_EE_SPI_HCMD_CMD_EN) ? -EBUSY : 0; +} + +/* Wait for SPI command completion */ +static int falcon_spi_wait(struct efx_nic *efx) +{ + /* Most commands will finish quickly, so we start polling at + * very short intervals. Sometimes the command may have to + * wait for VPD or expansion ROM access outside of our + * control, so we allow up to 100 ms. */ + unsigned long timeout = jiffies + 1 + DIV_ROUND_UP(HZ, 10); + int i; + + for (i = 0; i < 10; i++) { + if (!falcon_spi_poll(efx)) + return 0; + udelay(10); + } + + for (;;) { + if (!falcon_spi_poll(efx)) + return 0; + if (time_after_eq(jiffies, timeout)) { + netif_err(efx, hw, efx->net_dev, + "timed out waiting for SPI\n"); + return -ETIMEDOUT; + } + schedule_timeout_uninterruptible(1); + } +} + +int falcon_spi_cmd(struct efx_nic *efx, const struct efx_spi_device *spi, + unsigned int command, int address, + const void *in, void *out, size_t len) +{ + bool addressed = (address >= 0); + bool reading = (out != NULL); + efx_oword_t reg; + int rc; + + /* Input validation */ + if (len > FALCON_SPI_MAX_LEN) + return -EINVAL; + + /* Check that previous command is not still running */ + rc = falcon_spi_poll(efx); + if (rc) + return rc; + + /* Program address register, if we have an address */ + if (addressed) { + EFX_POPULATE_OWORD_1(reg, FRF_AB_EE_SPI_HADR_ADR, address); + efx_writeo(efx, ®, FR_AB_EE_SPI_HADR); + } + + /* Program data register, if we have data */ + if (in != NULL) { + memcpy(®, in, len); + efx_writeo(efx, ®, FR_AB_EE_SPI_HDATA); + } + + /* Issue read/write command */ + EFX_POPULATE_OWORD_7(reg, + FRF_AB_EE_SPI_HCMD_CMD_EN, 1, + FRF_AB_EE_SPI_HCMD_SF_SEL, spi->device_id, + FRF_AB_EE_SPI_HCMD_DABCNT, len, + FRF_AB_EE_SPI_HCMD_READ, reading, + FRF_AB_EE_SPI_HCMD_DUBCNT, 0, + FRF_AB_EE_SPI_HCMD_ADBCNT, + (addressed ? spi->addr_len : 0), + FRF_AB_EE_SPI_HCMD_ENC, command); + efx_writeo(efx, ®, FR_AB_EE_SPI_HCMD); + + /* Wait for read/write to complete */ + rc = falcon_spi_wait(efx); + if (rc) + return rc; + + /* Read data */ + if (out != NULL) { + efx_reado(efx, ®, FR_AB_EE_SPI_HDATA); + memcpy(out, ®, len); + } + + return 0; +} + +static size_t +falcon_spi_write_limit(const struct efx_spi_device *spi, size_t start) +{ + return min(FALCON_SPI_MAX_LEN, + (spi->block_size - (start & (spi->block_size - 1)))); +} + +static inline u8 +efx_spi_munge_command(const struct efx_spi_device *spi, + const u8 command, const unsigned int address) +{ + return command | (((address >> 8) & spi->munge_address) << 3); +} + +/* Wait up to 10 ms for buffered write completion */ +int +falcon_spi_wait_write(struct efx_nic *efx, const struct efx_spi_device *spi) +{ + unsigned long timeout = jiffies + 1 + DIV_ROUND_UP(HZ, 100); + u8 status; + int rc; + + for (;;) { + rc = falcon_spi_cmd(efx, spi, SPI_RDSR, -1, NULL, + &status, sizeof(status)); + if (rc) + return rc; + if (!(status & SPI_STATUS_NRDY)) + return 0; + if (time_after_eq(jiffies, timeout)) { + netif_err(efx, hw, efx->net_dev, + "SPI write timeout on device %d" + " last status=0x%02x\n", + spi->device_id, status); + return -ETIMEDOUT; + } + schedule_timeout_uninterruptible(1); + } +} + +int falcon_spi_read(struct efx_nic *efx, const struct efx_spi_device *spi, + loff_t start, size_t len, size_t *retlen, u8 *buffer) +{ + size_t block_len, pos = 0; + unsigned int command; + int rc = 0; + + while (pos < len) { + block_len = min(len - pos, FALCON_SPI_MAX_LEN); + + command = efx_spi_munge_command(spi, SPI_READ, start + pos); + rc = falcon_spi_cmd(efx, spi, command, start + pos, NULL, + buffer + pos, block_len); + if (rc) + break; + pos += block_len; + + /* Avoid locking up the system */ + cond_resched(); + if (signal_pending(current)) { + rc = -EINTR; + break; + } + } + + if (retlen) + *retlen = pos; + return rc; +} + +int +falcon_spi_write(struct efx_nic *efx, const struct efx_spi_device *spi, + loff_t start, size_t len, size_t *retlen, const u8 *buffer) +{ + u8 verify_buffer[FALCON_SPI_MAX_LEN]; + size_t block_len, pos = 0; + unsigned int command; + int rc = 0; + + while (pos < len) { + rc = falcon_spi_cmd(efx, spi, SPI_WREN, -1, NULL, NULL, 0); + if (rc) + break; + + block_len = min(len - pos, + falcon_spi_write_limit(spi, start + pos)); + command = efx_spi_munge_command(spi, SPI_WRITE, start + pos); + rc = falcon_spi_cmd(efx, spi, command, start + pos, + buffer + pos, NULL, block_len); + if (rc) + break; + + rc = falcon_spi_wait_write(efx, spi); + if (rc) + break; + + command = efx_spi_munge_command(spi, SPI_READ, start + pos); + rc = falcon_spi_cmd(efx, spi, command, start + pos, + NULL, verify_buffer, block_len); + if (memcmp(verify_buffer, buffer + pos, block_len)) { + rc = -EIO; + break; + } + + pos += block_len; + + /* Avoid locking up the system */ + cond_resched(); + if (signal_pending(current)) { + rc = -EINTR; + break; + } + } + + if (retlen) + *retlen = pos; + return rc; +} + +/************************************************************************** + * + * MAC wrapper + * + ************************************************************************** + */ + +static void falcon_push_multicast_hash(struct efx_nic *efx) +{ + union efx_multicast_hash *mc_hash = &efx->multicast_hash; + + WARN_ON(!mutex_is_locked(&efx->mac_lock)); + + efx_writeo(efx, &mc_hash->oword[0], FR_AB_MAC_MC_HASH_REG0); + efx_writeo(efx, &mc_hash->oword[1], FR_AB_MAC_MC_HASH_REG1); +} + +static void falcon_reset_macs(struct efx_nic *efx) +{ + struct falcon_nic_data *nic_data = efx->nic_data; + efx_oword_t reg, mac_ctrl; + int count; + + if (efx_nic_rev(efx) < EFX_REV_FALCON_B0) { + /* It's not safe to use GLB_CTL_REG to reset the + * macs, so instead use the internal MAC resets + */ + EFX_POPULATE_OWORD_1(reg, FRF_AB_XM_CORE_RST, 1); + efx_writeo(efx, ®, FR_AB_XM_GLB_CFG); + + for (count = 0; count < 10000; count++) { + efx_reado(efx, ®, FR_AB_XM_GLB_CFG); + if (EFX_OWORD_FIELD(reg, FRF_AB_XM_CORE_RST) == + 0) + return; + udelay(10); + } + + netif_err(efx, hw, efx->net_dev, + "timed out waiting for XMAC core reset\n"); + } + + /* Mac stats will fail whist the TX fifo is draining */ + WARN_ON(nic_data->stats_disable_count == 0); + + efx_reado(efx, &mac_ctrl, FR_AB_MAC_CTRL); + EFX_SET_OWORD_FIELD(mac_ctrl, FRF_BB_TXFIFO_DRAIN_EN, 1); + efx_writeo(efx, &mac_ctrl, FR_AB_MAC_CTRL); + + efx_reado(efx, ®, FR_AB_GLB_CTL); + EFX_SET_OWORD_FIELD(reg, FRF_AB_RST_XGTX, 1); + EFX_SET_OWORD_FIELD(reg, FRF_AB_RST_XGRX, 1); + EFX_SET_OWORD_FIELD(reg, FRF_AB_RST_EM, 1); + efx_writeo(efx, ®, FR_AB_GLB_CTL); + + count = 0; + while (1) { + efx_reado(efx, ®, FR_AB_GLB_CTL); + if (!EFX_OWORD_FIELD(reg, FRF_AB_RST_XGTX) && + !EFX_OWORD_FIELD(reg, FRF_AB_RST_XGRX) && + !EFX_OWORD_FIELD(reg, FRF_AB_RST_EM)) { + netif_dbg(efx, hw, efx->net_dev, + "Completed MAC reset after %d loops\n", + count); + break; + } + if (count > 20) { + netif_err(efx, hw, efx->net_dev, "MAC reset failed\n"); + break; + } + count++; + udelay(10); + } + + /* Ensure the correct MAC is selected before statistics + * are re-enabled by the caller */ + efx_writeo(efx, &mac_ctrl, FR_AB_MAC_CTRL); + + falcon_setup_xaui(efx); +} + +void falcon_drain_tx_fifo(struct efx_nic *efx) +{ + efx_oword_t reg; + + if ((efx_nic_rev(efx) < EFX_REV_FALCON_B0) || + (efx->loopback_mode != LOOPBACK_NONE)) + return; + + efx_reado(efx, ®, FR_AB_MAC_CTRL); + /* There is no point in draining more than once */ + if (EFX_OWORD_FIELD(reg, FRF_BB_TXFIFO_DRAIN_EN)) + return; + + falcon_reset_macs(efx); +} + +static void falcon_deconfigure_mac_wrapper(struct efx_nic *efx) +{ + efx_oword_t reg; + + if (efx_nic_rev(efx) < EFX_REV_FALCON_B0) + return; + + /* Isolate the MAC -> RX */ + efx_reado(efx, ®, FR_AZ_RX_CFG); + EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_INGR_EN, 0); + efx_writeo(efx, ®, FR_AZ_RX_CFG); + + /* Isolate TX -> MAC */ + falcon_drain_tx_fifo(efx); +} + +void falcon_reconfigure_mac_wrapper(struct efx_nic *efx) +{ + struct efx_link_state *link_state = &efx->link_state; + efx_oword_t reg; + int link_speed, isolate; + + isolate = !!ACCESS_ONCE(efx->reset_pending); + + switch (link_state->speed) { + case 10000: link_speed = 3; break; + case 1000: link_speed = 2; break; + case 100: link_speed = 1; break; + default: link_speed = 0; break; + } + /* MAC_LINK_STATUS controls MAC backpressure but doesn't work + * as advertised. Disable to ensure packets are not + * indefinitely held and TX queue can be flushed at any point + * while the link is down. */ + EFX_POPULATE_OWORD_5(reg, + FRF_AB_MAC_XOFF_VAL, 0xffff /* max pause time */, + FRF_AB_MAC_BCAD_ACPT, 1, + FRF_AB_MAC_UC_PROM, efx->promiscuous, + FRF_AB_MAC_LINK_STATUS, 1, /* always set */ + FRF_AB_MAC_SPEED, link_speed); + /* On B0, MAC backpressure can be disabled and packets get + * discarded. */ + if (efx_nic_rev(efx) >= EFX_REV_FALCON_B0) { + EFX_SET_OWORD_FIELD(reg, FRF_BB_TXFIFO_DRAIN_EN, + !link_state->up || isolate); + } + + efx_writeo(efx, ®, FR_AB_MAC_CTRL); + + /* Restore the multicast hash registers. */ + falcon_push_multicast_hash(efx); + + efx_reado(efx, ®, FR_AZ_RX_CFG); + /* Enable XOFF signal from RX FIFO (we enabled it during NIC + * initialisation but it may read back as 0) */ + EFX_SET_OWORD_FIELD(reg, FRF_AZ_RX_XOFF_MAC_EN, 1); + /* Unisolate the MAC -> RX */ + if (efx_nic_rev(efx) >= EFX_REV_FALCON_B0) + EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_INGR_EN, !isolate); + efx_writeo(efx, ®, FR_AZ_RX_CFG); +} + +static void falcon_stats_request(struct efx_nic *efx) +{ + struct falcon_nic_data *nic_data = efx->nic_data; + efx_oword_t reg; + + WARN_ON(nic_data->stats_pending); + WARN_ON(nic_data->stats_disable_count); + + if (nic_data->stats_dma_done == NULL) + return; /* no mac selected */ + + *nic_data->stats_dma_done = FALCON_STATS_NOT_DONE; + nic_data->stats_pending = true; + wmb(); /* ensure done flag is clear */ + + /* Initiate DMA transfer of stats */ + EFX_POPULATE_OWORD_2(reg, + FRF_AB_MAC_STAT_DMA_CMD, 1, + FRF_AB_MAC_STAT_DMA_ADR, + efx->stats_buffer.dma_addr); + efx_writeo(efx, ®, FR_AB_MAC_STAT_DMA); + + mod_timer(&nic_data->stats_timer, round_jiffies_up(jiffies + HZ / 2)); +} + +static void falcon_stats_complete(struct efx_nic *efx) +{ + struct falcon_nic_data *nic_data = efx->nic_data; + + if (!nic_data->stats_pending) + return; + + nic_data->stats_pending = 0; + if (*nic_data->stats_dma_done == FALCON_STATS_DONE) { + rmb(); /* read the done flag before the stats */ + efx->mac_op->update_stats(efx); + } else { + netif_err(efx, hw, efx->net_dev, + "timed out waiting for statistics\n"); + } +} + +static void falcon_stats_timer_func(unsigned long context) +{ + struct efx_nic *efx = (struct efx_nic *)context; + struct falcon_nic_data *nic_data = efx->nic_data; + + spin_lock(&efx->stats_lock); + + falcon_stats_complete(efx); + if (nic_data->stats_disable_count == 0) + falcon_stats_request(efx); + + spin_unlock(&efx->stats_lock); +} + +static bool falcon_loopback_link_poll(struct efx_nic *efx) +{ + struct efx_link_state old_state = efx->link_state; + + WARN_ON(!mutex_is_locked(&efx->mac_lock)); + WARN_ON(!LOOPBACK_INTERNAL(efx)); + + efx->link_state.fd = true; + efx->link_state.fc = efx->wanted_fc; + efx->link_state.up = true; + efx->link_state.speed = 10000; + + return !efx_link_state_equal(&efx->link_state, &old_state); +} + +static int falcon_reconfigure_port(struct efx_nic *efx) +{ + int rc; + + WARN_ON(efx_nic_rev(efx) > EFX_REV_FALCON_B0); + + /* Poll the PHY link state *before* reconfiguring it. This means we + * will pick up the correct speed (in loopback) to select the correct + * MAC. + */ + if (LOOPBACK_INTERNAL(efx)) + falcon_loopback_link_poll(efx); + else + efx->phy_op->poll(efx); + + falcon_stop_nic_stats(efx); + falcon_deconfigure_mac_wrapper(efx); + + falcon_reset_macs(efx); + + efx->phy_op->reconfigure(efx); + rc = efx->mac_op->reconfigure(efx); + BUG_ON(rc); + + falcon_start_nic_stats(efx); + + /* Synchronise efx->link_state with the kernel */ + efx_link_status_changed(efx); + + return 0; +} + +/************************************************************************** + * + * PHY access via GMII + * + ************************************************************************** + */ + +/* Wait for GMII access to complete */ +static int falcon_gmii_wait(struct efx_nic *efx) +{ + efx_oword_t md_stat; + int count; + + /* wait up to 50ms - taken max from datasheet */ + for (count = 0; count < 5000; count++) { + efx_reado(efx, &md_stat, FR_AB_MD_STAT); + if (EFX_OWORD_FIELD(md_stat, FRF_AB_MD_BSY) == 0) { + if (EFX_OWORD_FIELD(md_stat, FRF_AB_MD_LNFL) != 0 || + EFX_OWORD_FIELD(md_stat, FRF_AB_MD_BSERR) != 0) { + netif_err(efx, hw, efx->net_dev, + "error from GMII access " + EFX_OWORD_FMT"\n", + EFX_OWORD_VAL(md_stat)); + return -EIO; + } + return 0; + } + udelay(10); + } + netif_err(efx, hw, efx->net_dev, "timed out waiting for GMII\n"); + return -ETIMEDOUT; +} + +/* Write an MDIO register of a PHY connected to Falcon. */ +static int falcon_mdio_write(struct net_device *net_dev, + int prtad, int devad, u16 addr, u16 value) +{ + struct efx_nic *efx = netdev_priv(net_dev); + struct falcon_nic_data *nic_data = efx->nic_data; + efx_oword_t reg; + int rc; + + netif_vdbg(efx, hw, efx->net_dev, + "writing MDIO %d register %d.%d with 0x%04x\n", + prtad, devad, addr, value); + + mutex_lock(&nic_data->mdio_lock); + + /* Check MDIO not currently being accessed */ + rc = falcon_gmii_wait(efx); + if (rc) + goto out; + + /* Write the address/ID register */ + EFX_POPULATE_OWORD_1(reg, FRF_AB_MD_PHY_ADR, addr); + efx_writeo(efx, ®, FR_AB_MD_PHY_ADR); + + EFX_POPULATE_OWORD_2(reg, FRF_AB_MD_PRT_ADR, prtad, + FRF_AB_MD_DEV_ADR, devad); + efx_writeo(efx, ®, FR_AB_MD_ID); + + /* Write data */ + EFX_POPULATE_OWORD_1(reg, FRF_AB_MD_TXD, value); + efx_writeo(efx, ®, FR_AB_MD_TXD); + + EFX_POPULATE_OWORD_2(reg, + FRF_AB_MD_WRC, 1, + FRF_AB_MD_GC, 0); + efx_writeo(efx, ®, FR_AB_MD_CS); + + /* Wait for data to be written */ + rc = falcon_gmii_wait(efx); + if (rc) { + /* Abort the write operation */ + EFX_POPULATE_OWORD_2(reg, + FRF_AB_MD_WRC, 0, + FRF_AB_MD_GC, 1); + efx_writeo(efx, ®, FR_AB_MD_CS); + udelay(10); + } + +out: + mutex_unlock(&nic_data->mdio_lock); + return rc; +} + +/* Read an MDIO register of a PHY connected to Falcon. */ +static int falcon_mdio_read(struct net_device *net_dev, + int prtad, int devad, u16 addr) +{ + struct efx_nic *efx = netdev_priv(net_dev); + struct falcon_nic_data *nic_data = efx->nic_data; + efx_oword_t reg; + int rc; + + mutex_lock(&nic_data->mdio_lock); + + /* Check MDIO not currently being accessed */ + rc = falcon_gmii_wait(efx); + if (rc) + goto out; + + EFX_POPULATE_OWORD_1(reg, FRF_AB_MD_PHY_ADR, addr); + efx_writeo(efx, ®, FR_AB_MD_PHY_ADR); + + EFX_POPULATE_OWORD_2(reg, FRF_AB_MD_PRT_ADR, prtad, + FRF_AB_MD_DEV_ADR, devad); + efx_writeo(efx, ®, FR_AB_MD_ID); + + /* Request data to be read */ + EFX_POPULATE_OWORD_2(reg, FRF_AB_MD_RDC, 1, FRF_AB_MD_GC, 0); + efx_writeo(efx, ®, FR_AB_MD_CS); + + /* Wait for data to become available */ + rc = falcon_gmii_wait(efx); + if (rc == 0) { + efx_reado(efx, ®, FR_AB_MD_RXD); + rc = EFX_OWORD_FIELD(reg, FRF_AB_MD_RXD); + netif_vdbg(efx, hw, efx->net_dev, + "read from MDIO %d register %d.%d, got %04x\n", + prtad, devad, addr, rc); + } else { + /* Abort the read operation */ + EFX_POPULATE_OWORD_2(reg, + FRF_AB_MD_RIC, 0, + FRF_AB_MD_GC, 1); + efx_writeo(efx, ®, FR_AB_MD_CS); + + netif_dbg(efx, hw, efx->net_dev, + "read from MDIO %d register %d.%d, got error %d\n", + prtad, devad, addr, rc); + } + +out: + mutex_unlock(&nic_data->mdio_lock); + return rc; +} + +/* This call is responsible for hooking in the MAC and PHY operations */ +static int falcon_probe_port(struct efx_nic *efx) +{ + struct falcon_nic_data *nic_data = efx->nic_data; + int rc; + + switch (efx->phy_type) { + case PHY_TYPE_SFX7101: + efx->phy_op = &falcon_sfx7101_phy_ops; + break; + case PHY_TYPE_QT2022C2: + case PHY_TYPE_QT2025C: + efx->phy_op = &falcon_qt202x_phy_ops; + break; + case PHY_TYPE_TXC43128: + efx->phy_op = &falcon_txc_phy_ops; + break; + default: + netif_err(efx, probe, efx->net_dev, "Unknown PHY type %d\n", + efx->phy_type); + return -ENODEV; + } + + /* Fill out MDIO structure and loopback modes */ + mutex_init(&nic_data->mdio_lock); + efx->mdio.mdio_read = falcon_mdio_read; + efx->mdio.mdio_write = falcon_mdio_write; + rc = efx->phy_op->probe(efx); + if (rc != 0) + return rc; + + /* Initial assumption */ + efx->link_state.speed = 10000; + efx->link_state.fd = true; + + /* Hardware flow ctrl. FalconA RX FIFO too small for pause generation */ + if (efx_nic_rev(efx) >= EFX_REV_FALCON_B0) + efx->wanted_fc = EFX_FC_RX | EFX_FC_TX; + else + efx->wanted_fc = EFX_FC_RX; + if (efx->mdio.mmds & MDIO_DEVS_AN) + efx->wanted_fc |= EFX_FC_AUTO; + + /* Allocate buffer for stats */ + rc = efx_nic_alloc_buffer(efx, &efx->stats_buffer, + FALCON_MAC_STATS_SIZE); + if (rc) + return rc; + netif_dbg(efx, probe, efx->net_dev, + "stats buffer at %llx (virt %p phys %llx)\n", + (u64)efx->stats_buffer.dma_addr, + efx->stats_buffer.addr, + (u64)virt_to_phys(efx->stats_buffer.addr)); + nic_data->stats_dma_done = efx->stats_buffer.addr + XgDmaDone_offset; + + return 0; +} + +static void falcon_remove_port(struct efx_nic *efx) +{ + efx->phy_op->remove(efx); + efx_nic_free_buffer(efx, &efx->stats_buffer); +} + +/* Global events are basically PHY events */ +static bool +falcon_handle_global_event(struct efx_channel *channel, efx_qword_t *event) +{ + struct efx_nic *efx = channel->efx; + struct falcon_nic_data *nic_data = efx->nic_data; + + if (EFX_QWORD_FIELD(*event, FSF_AB_GLB_EV_G_PHY0_INTR) || + EFX_QWORD_FIELD(*event, FSF_AB_GLB_EV_XG_PHY0_INTR) || + EFX_QWORD_FIELD(*event, FSF_AB_GLB_EV_XFP_PHY0_INTR)) + /* Ignored */ + return true; + + if ((efx_nic_rev(efx) == EFX_REV_FALCON_B0) && + EFX_QWORD_FIELD(*event, FSF_BB_GLB_EV_XG_MGT_INTR)) { + nic_data->xmac_poll_required = true; + return true; + } + + if (efx_nic_rev(efx) <= EFX_REV_FALCON_A1 ? + EFX_QWORD_FIELD(*event, FSF_AA_GLB_EV_RX_RECOVERY) : + EFX_QWORD_FIELD(*event, FSF_BB_GLB_EV_RX_RECOVERY)) { + netif_err(efx, rx_err, efx->net_dev, + "channel %d seen global RX_RESET event. Resetting.\n", + channel->channel); + + atomic_inc(&efx->rx_reset); + efx_schedule_reset(efx, EFX_WORKAROUND_6555(efx) ? + RESET_TYPE_RX_RECOVERY : RESET_TYPE_DISABLE); + return true; + } + + return false; +} + +/************************************************************************** + * + * Falcon test code + * + **************************************************************************/ + +static int +falcon_read_nvram(struct efx_nic *efx, struct falcon_nvconfig *nvconfig_out) +{ + struct falcon_nic_data *nic_data = efx->nic_data; + struct falcon_nvconfig *nvconfig; + struct efx_spi_device *spi; + void *region; + int rc, magic_num, struct_ver; + __le16 *word, *limit; + u32 csum; + + if (efx_spi_present(&nic_data->spi_flash)) + spi = &nic_data->spi_flash; + else if (efx_spi_present(&nic_data->spi_eeprom)) + spi = &nic_data->spi_eeprom; + else + return -EINVAL; + + region = kmalloc(FALCON_NVCONFIG_END, GFP_KERNEL); + if (!region) + return -ENOMEM; + nvconfig = region + FALCON_NVCONFIG_OFFSET; + + mutex_lock(&nic_data->spi_lock); + rc = falcon_spi_read(efx, spi, 0, FALCON_NVCONFIG_END, NULL, region); + mutex_unlock(&nic_data->spi_lock); + if (rc) { + netif_err(efx, hw, efx->net_dev, "Failed to read %s\n", + efx_spi_present(&nic_data->spi_flash) ? + "flash" : "EEPROM"); + rc = -EIO; + goto out; + } + + magic_num = le16_to_cpu(nvconfig->board_magic_num); + struct_ver = le16_to_cpu(nvconfig->board_struct_ver); + + rc = -EINVAL; + if (magic_num != FALCON_NVCONFIG_BOARD_MAGIC_NUM) { + netif_err(efx, hw, efx->net_dev, + "NVRAM bad magic 0x%x\n", magic_num); + goto out; + } + if (struct_ver < 2) { + netif_err(efx, hw, efx->net_dev, + "NVRAM has ancient version 0x%x\n", struct_ver); + goto out; + } else if (struct_ver < 4) { + word = &nvconfig->board_magic_num; + limit = (__le16 *) (nvconfig + 1); + } else { + word = region; + limit = region + FALCON_NVCONFIG_END; + } + for (csum = 0; word < limit; ++word) + csum += le16_to_cpu(*word); + + if (~csum & 0xffff) { + netif_err(efx, hw, efx->net_dev, + "NVRAM has incorrect checksum\n"); + goto out; + } + + rc = 0; + if (nvconfig_out) + memcpy(nvconfig_out, nvconfig, sizeof(*nvconfig)); + + out: + kfree(region); + return rc; +} + +static int falcon_test_nvram(struct efx_nic *efx) +{ + return falcon_read_nvram(efx, NULL); +} + +static const struct efx_nic_register_test falcon_b0_register_tests[] = { + { FR_AZ_ADR_REGION, + EFX_OWORD32(0x0003FFFF, 0x0003FFFF, 0x0003FFFF, 0x0003FFFF) }, + { FR_AZ_RX_CFG, + EFX_OWORD32(0xFFFFFFFE, 0x00017FFF, 0x00000000, 0x00000000) }, + { FR_AZ_TX_CFG, + EFX_OWORD32(0x7FFF0037, 0x00000000, 0x00000000, 0x00000000) }, + { FR_AZ_TX_RESERVED, + EFX_OWORD32(0xFFFEFE80, 0x1FFFFFFF, 0x020000FE, 0x007FFFFF) }, + { FR_AB_MAC_CTRL, + EFX_OWORD32(0xFFFF0000, 0x00000000, 0x00000000, 0x00000000) }, + { FR_AZ_SRM_TX_DC_CFG, + EFX_OWORD32(0x001FFFFF, 0x00000000, 0x00000000, 0x00000000) }, + { FR_AZ_RX_DC_CFG, + EFX_OWORD32(0x0000000F, 0x00000000, 0x00000000, 0x00000000) }, + { FR_AZ_RX_DC_PF_WM, + EFX_OWORD32(0x000003FF, 0x00000000, 0x00000000, 0x00000000) }, + { FR_BZ_DP_CTRL, + EFX_OWORD32(0x00000FFF, 0x00000000, 0x00000000, 0x00000000) }, + { FR_AB_GM_CFG2, + EFX_OWORD32(0x00007337, 0x00000000, 0x00000000, 0x00000000) }, + { FR_AB_GMF_CFG0, + EFX_OWORD32(0x00001F1F, 0x00000000, 0x00000000, 0x00000000) }, + { FR_AB_XM_GLB_CFG, + EFX_OWORD32(0x00000C68, 0x00000000, 0x00000000, 0x00000000) }, + { FR_AB_XM_TX_CFG, + EFX_OWORD32(0x00080164, 0x00000000, 0x00000000, 0x00000000) }, + { FR_AB_XM_RX_CFG, + EFX_OWORD32(0x07100A0C, 0x00000000, 0x00000000, 0x00000000) }, + { FR_AB_XM_RX_PARAM, + EFX_OWORD32(0x00001FF8, 0x00000000, 0x00000000, 0x00000000) }, + { FR_AB_XM_FC, + EFX_OWORD32(0xFFFF0001, 0x00000000, 0x00000000, 0x00000000) }, + { FR_AB_XM_ADR_LO, + EFX_OWORD32(0xFFFFFFFF, 0x00000000, 0x00000000, 0x00000000) }, + { FR_AB_XX_SD_CTL, + EFX_OWORD32(0x0003FF0F, 0x00000000, 0x00000000, 0x00000000) }, +}; + +static int falcon_b0_test_registers(struct efx_nic *efx) +{ + return efx_nic_test_registers(efx, falcon_b0_register_tests, + ARRAY_SIZE(falcon_b0_register_tests)); +} + +/************************************************************************** + * + * Device reset + * + ************************************************************************** + */ + +static enum reset_type falcon_map_reset_reason(enum reset_type reason) +{ + switch (reason) { + case RESET_TYPE_RX_RECOVERY: + case RESET_TYPE_RX_DESC_FETCH: + case RESET_TYPE_TX_DESC_FETCH: + case RESET_TYPE_TX_SKIP: + /* These can occasionally occur due to hardware bugs. + * We try to reset without disrupting the link. + */ + return RESET_TYPE_INVISIBLE; + default: + return RESET_TYPE_ALL; + } +} + +static int falcon_map_reset_flags(u32 *flags) +{ + enum { + FALCON_RESET_INVISIBLE = (ETH_RESET_DMA | ETH_RESET_FILTER | + ETH_RESET_OFFLOAD | ETH_RESET_MAC), + FALCON_RESET_ALL = FALCON_RESET_INVISIBLE | ETH_RESET_PHY, + FALCON_RESET_WORLD = FALCON_RESET_ALL | ETH_RESET_IRQ, + }; + + if ((*flags & FALCON_RESET_WORLD) == FALCON_RESET_WORLD) { + *flags &= ~FALCON_RESET_WORLD; + return RESET_TYPE_WORLD; + } + + if ((*flags & FALCON_RESET_ALL) == FALCON_RESET_ALL) { + *flags &= ~FALCON_RESET_ALL; + return RESET_TYPE_ALL; + } + + if ((*flags & FALCON_RESET_INVISIBLE) == FALCON_RESET_INVISIBLE) { + *flags &= ~FALCON_RESET_INVISIBLE; + return RESET_TYPE_INVISIBLE; + } + + return -EINVAL; +} + +/* Resets NIC to known state. This routine must be called in process + * context and is allowed to sleep. */ +static int __falcon_reset_hw(struct efx_nic *efx, enum reset_type method) +{ + struct falcon_nic_data *nic_data = efx->nic_data; + efx_oword_t glb_ctl_reg_ker; + int rc; + + netif_dbg(efx, hw, efx->net_dev, "performing %s hardware reset\n", + RESET_TYPE(method)); + + /* Initiate device reset */ + if (method == RESET_TYPE_WORLD) { + rc = pci_save_state(efx->pci_dev); + if (rc) { + netif_err(efx, drv, efx->net_dev, + "failed to backup PCI state of primary " + "function prior to hardware reset\n"); + goto fail1; + } + if (efx_nic_is_dual_func(efx)) { + rc = pci_save_state(nic_data->pci_dev2); + if (rc) { + netif_err(efx, drv, efx->net_dev, + "failed to backup PCI state of " + "secondary function prior to " + "hardware reset\n"); + goto fail2; + } + } + + EFX_POPULATE_OWORD_2(glb_ctl_reg_ker, + FRF_AB_EXT_PHY_RST_DUR, + FFE_AB_EXT_PHY_RST_DUR_10240US, + FRF_AB_SWRST, 1); + } else { + EFX_POPULATE_OWORD_7(glb_ctl_reg_ker, + /* exclude PHY from "invisible" reset */ + FRF_AB_EXT_PHY_RST_CTL, + method == RESET_TYPE_INVISIBLE, + /* exclude EEPROM/flash and PCIe */ + FRF_AB_PCIE_CORE_RST_CTL, 1, + FRF_AB_PCIE_NSTKY_RST_CTL, 1, + FRF_AB_PCIE_SD_RST_CTL, 1, + FRF_AB_EE_RST_CTL, 1, + FRF_AB_EXT_PHY_RST_DUR, + FFE_AB_EXT_PHY_RST_DUR_10240US, + FRF_AB_SWRST, 1); + } + efx_writeo(efx, &glb_ctl_reg_ker, FR_AB_GLB_CTL); + + netif_dbg(efx, hw, efx->net_dev, "waiting for hardware reset\n"); + schedule_timeout_uninterruptible(HZ / 20); + + /* Restore PCI configuration if needed */ + if (method == RESET_TYPE_WORLD) { + if (efx_nic_is_dual_func(efx)) + pci_restore_state(nic_data->pci_dev2); + pci_restore_state(efx->pci_dev); + netif_dbg(efx, drv, efx->net_dev, + "successfully restored PCI config\n"); + } + + /* Assert that reset complete */ + efx_reado(efx, &glb_ctl_reg_ker, FR_AB_GLB_CTL); + if (EFX_OWORD_FIELD(glb_ctl_reg_ker, FRF_AB_SWRST) != 0) { + rc = -ETIMEDOUT; + netif_err(efx, hw, efx->net_dev, + "timed out waiting for hardware reset\n"); + goto fail3; + } + netif_dbg(efx, hw, efx->net_dev, "hardware reset complete\n"); + + return 0; + + /* pci_save_state() and pci_restore_state() MUST be called in pairs */ +fail2: + pci_restore_state(efx->pci_dev); +fail1: +fail3: + return rc; +} + +static int falcon_reset_hw(struct efx_nic *efx, enum reset_type method) +{ + struct falcon_nic_data *nic_data = efx->nic_data; + int rc; + + mutex_lock(&nic_data->spi_lock); + rc = __falcon_reset_hw(efx, method); + mutex_unlock(&nic_data->spi_lock); + + return rc; +} + +static void falcon_monitor(struct efx_nic *efx) +{ + bool link_changed; + int rc; + + BUG_ON(!mutex_is_locked(&efx->mac_lock)); + + rc = falcon_board(efx)->type->monitor(efx); + if (rc) { + netif_err(efx, hw, efx->net_dev, + "Board sensor %s; shutting down PHY\n", + (rc == -ERANGE) ? "reported fault" : "failed"); + efx->phy_mode |= PHY_MODE_LOW_POWER; + rc = __efx_reconfigure_port(efx); + WARN_ON(rc); + } + + if (LOOPBACK_INTERNAL(efx)) + link_changed = falcon_loopback_link_poll(efx); + else + link_changed = efx->phy_op->poll(efx); + + if (link_changed) { + falcon_stop_nic_stats(efx); + falcon_deconfigure_mac_wrapper(efx); + + falcon_reset_macs(efx); + rc = efx->mac_op->reconfigure(efx); + BUG_ON(rc); + + falcon_start_nic_stats(efx); + + efx_link_status_changed(efx); + } + + falcon_poll_xmac(efx); +} + +/* Zeroes out the SRAM contents. This routine must be called in + * process context and is allowed to sleep. + */ +static int falcon_reset_sram(struct efx_nic *efx) +{ + efx_oword_t srm_cfg_reg_ker, gpio_cfg_reg_ker; + int count; + + /* Set the SRAM wake/sleep GPIO appropriately. */ + efx_reado(efx, &gpio_cfg_reg_ker, FR_AB_GPIO_CTL); + EFX_SET_OWORD_FIELD(gpio_cfg_reg_ker, FRF_AB_GPIO1_OEN, 1); + EFX_SET_OWORD_FIELD(gpio_cfg_reg_ker, FRF_AB_GPIO1_OUT, 1); + efx_writeo(efx, &gpio_cfg_reg_ker, FR_AB_GPIO_CTL); + + /* Initiate SRAM reset */ + EFX_POPULATE_OWORD_2(srm_cfg_reg_ker, + FRF_AZ_SRM_INIT_EN, 1, + FRF_AZ_SRM_NB_SZ, 0); + efx_writeo(efx, &srm_cfg_reg_ker, FR_AZ_SRM_CFG); + + /* Wait for SRAM reset to complete */ + count = 0; + do { + netif_dbg(efx, hw, efx->net_dev, + "waiting for SRAM reset (attempt %d)...\n", count); + + /* SRAM reset is slow; expect around 16ms */ + schedule_timeout_uninterruptible(HZ / 50); + + /* Check for reset complete */ + efx_reado(efx, &srm_cfg_reg_ker, FR_AZ_SRM_CFG); + if (!EFX_OWORD_FIELD(srm_cfg_reg_ker, FRF_AZ_SRM_INIT_EN)) { + netif_dbg(efx, hw, efx->net_dev, + "SRAM reset complete\n"); + + return 0; + } + } while (++count < 20); /* wait up to 0.4 sec */ + + netif_err(efx, hw, efx->net_dev, "timed out waiting for SRAM reset\n"); + return -ETIMEDOUT; +} + +static void falcon_spi_device_init(struct efx_nic *efx, + struct efx_spi_device *spi_device, + unsigned int device_id, u32 device_type) +{ + if (device_type != 0) { + spi_device->device_id = device_id; + spi_device->size = + 1 << SPI_DEV_TYPE_FIELD(device_type, SPI_DEV_TYPE_SIZE); + spi_device->addr_len = + SPI_DEV_TYPE_FIELD(device_type, SPI_DEV_TYPE_ADDR_LEN); + spi_device->munge_address = (spi_device->size == 1 << 9 && + spi_device->addr_len == 1); + spi_device->erase_command = + SPI_DEV_TYPE_FIELD(device_type, SPI_DEV_TYPE_ERASE_CMD); + spi_device->erase_size = + 1 << SPI_DEV_TYPE_FIELD(device_type, + SPI_DEV_TYPE_ERASE_SIZE); + spi_device->block_size = + 1 << SPI_DEV_TYPE_FIELD(device_type, + SPI_DEV_TYPE_BLOCK_SIZE); + } else { + spi_device->size = 0; + } +} + +/* Extract non-volatile configuration */ +static int falcon_probe_nvconfig(struct efx_nic *efx) +{ + struct falcon_nic_data *nic_data = efx->nic_data; + struct falcon_nvconfig *nvconfig; + int rc; + + nvconfig = kmalloc(sizeof(*nvconfig), GFP_KERNEL); + if (!nvconfig) + return -ENOMEM; + + rc = falcon_read_nvram(efx, nvconfig); + if (rc) + goto out; + + efx->phy_type = nvconfig->board_v2.port0_phy_type; + efx->mdio.prtad = nvconfig->board_v2.port0_phy_addr; + + if (le16_to_cpu(nvconfig->board_struct_ver) >= 3) { + falcon_spi_device_init( + efx, &nic_data->spi_flash, FFE_AB_SPI_DEVICE_FLASH, + le32_to_cpu(nvconfig->board_v3 + .spi_device_type[FFE_AB_SPI_DEVICE_FLASH])); + falcon_spi_device_init( + efx, &nic_data->spi_eeprom, FFE_AB_SPI_DEVICE_EEPROM, + le32_to_cpu(nvconfig->board_v3 + .spi_device_type[FFE_AB_SPI_DEVICE_EEPROM])); + } + + /* Read the MAC addresses */ + memcpy(efx->net_dev->perm_addr, nvconfig->mac_address[0], ETH_ALEN); + + netif_dbg(efx, probe, efx->net_dev, "PHY is %d phy_id %d\n", + efx->phy_type, efx->mdio.prtad); + + rc = falcon_probe_board(efx, + le16_to_cpu(nvconfig->board_v2.board_revision)); +out: + kfree(nvconfig); + return rc; +} + +/* Probe all SPI devices on the NIC */ +static void falcon_probe_spi_devices(struct efx_nic *efx) +{ + struct falcon_nic_data *nic_data = efx->nic_data; + efx_oword_t nic_stat, gpio_ctl, ee_vpd_cfg; + int boot_dev; + + efx_reado(efx, &gpio_ctl, FR_AB_GPIO_CTL); + efx_reado(efx, &nic_stat, FR_AB_NIC_STAT); + efx_reado(efx, &ee_vpd_cfg, FR_AB_EE_VPD_CFG0); + + if (EFX_OWORD_FIELD(gpio_ctl, FRF_AB_GPIO3_PWRUP_VALUE)) { + boot_dev = (EFX_OWORD_FIELD(nic_stat, FRF_AB_SF_PRST) ? + FFE_AB_SPI_DEVICE_FLASH : FFE_AB_SPI_DEVICE_EEPROM); + netif_dbg(efx, probe, efx->net_dev, "Booted from %s\n", + boot_dev == FFE_AB_SPI_DEVICE_FLASH ? + "flash" : "EEPROM"); + } else { + /* Disable VPD and set clock dividers to safe + * values for initial programming. */ + boot_dev = -1; + netif_dbg(efx, probe, efx->net_dev, + "Booted from internal ASIC settings;" + " setting SPI config\n"); + EFX_POPULATE_OWORD_3(ee_vpd_cfg, FRF_AB_EE_VPD_EN, 0, + /* 125 MHz / 7 ~= 20 MHz */ + FRF_AB_EE_SF_CLOCK_DIV, 7, + /* 125 MHz / 63 ~= 2 MHz */ + FRF_AB_EE_EE_CLOCK_DIV, 63); + efx_writeo(efx, &ee_vpd_cfg, FR_AB_EE_VPD_CFG0); + } + + mutex_init(&nic_data->spi_lock); + + if (boot_dev == FFE_AB_SPI_DEVICE_FLASH) + falcon_spi_device_init(efx, &nic_data->spi_flash, + FFE_AB_SPI_DEVICE_FLASH, + default_flash_type); + if (boot_dev == FFE_AB_SPI_DEVICE_EEPROM) + falcon_spi_device_init(efx, &nic_data->spi_eeprom, + FFE_AB_SPI_DEVICE_EEPROM, + large_eeprom_type); +} + +static int falcon_probe_nic(struct efx_nic *efx) +{ + struct falcon_nic_data *nic_data; + struct falcon_board *board; + int rc; + + /* Allocate storage for hardware specific data */ + nic_data = kzalloc(sizeof(*nic_data), GFP_KERNEL); + if (!nic_data) + return -ENOMEM; + efx->nic_data = nic_data; + + rc = -ENODEV; + + if (efx_nic_fpga_ver(efx) != 0) { + netif_err(efx, probe, efx->net_dev, + "Falcon FPGA not supported\n"); + goto fail1; + } + + if (efx_nic_rev(efx) <= EFX_REV_FALCON_A1) { + efx_oword_t nic_stat; + struct pci_dev *dev; + u8 pci_rev = efx->pci_dev->revision; + + if ((pci_rev == 0xff) || (pci_rev == 0)) { + netif_err(efx, probe, efx->net_dev, + "Falcon rev A0 not supported\n"); + goto fail1; + } + efx_reado(efx, &nic_stat, FR_AB_NIC_STAT); + if (EFX_OWORD_FIELD(nic_stat, FRF_AB_STRAP_10G) == 0) { + netif_err(efx, probe, efx->net_dev, + "Falcon rev A1 1G not supported\n"); + goto fail1; + } + if (EFX_OWORD_FIELD(nic_stat, FRF_AA_STRAP_PCIE) == 0) { + netif_err(efx, probe, efx->net_dev, + "Falcon rev A1 PCI-X not supported\n"); + goto fail1; + } + + dev = pci_dev_get(efx->pci_dev); + while ((dev = pci_get_device(EFX_VENDID_SFC, FALCON_A_S_DEVID, + dev))) { + if (dev->bus == efx->pci_dev->bus && + dev->devfn == efx->pci_dev->devfn + 1) { + nic_data->pci_dev2 = dev; + break; + } + } + if (!nic_data->pci_dev2) { + netif_err(efx, probe, efx->net_dev, + "failed to find secondary function\n"); + rc = -ENODEV; + goto fail2; + } + } + + /* Now we can reset the NIC */ + rc = __falcon_reset_hw(efx, RESET_TYPE_ALL); + if (rc) { + netif_err(efx, probe, efx->net_dev, "failed to reset NIC\n"); + goto fail3; + } + + /* Allocate memory for INT_KER */ + rc = efx_nic_alloc_buffer(efx, &efx->irq_status, sizeof(efx_oword_t)); + if (rc) + goto fail4; + BUG_ON(efx->irq_status.dma_addr & 0x0f); + + netif_dbg(efx, probe, efx->net_dev, + "INT_KER at %llx (virt %p phys %llx)\n", + (u64)efx->irq_status.dma_addr, + efx->irq_status.addr, + (u64)virt_to_phys(efx->irq_status.addr)); + + falcon_probe_spi_devices(efx); + + /* Read in the non-volatile configuration */ + rc = falcon_probe_nvconfig(efx); + if (rc) { + if (rc == -EINVAL) + netif_err(efx, probe, efx->net_dev, "NVRAM is invalid\n"); + goto fail5; + } + + /* Initialise I2C adapter */ + board = falcon_board(efx); + board->i2c_adap.owner = THIS_MODULE; + board->i2c_data = falcon_i2c_bit_operations; + board->i2c_data.data = efx; + board->i2c_adap.algo_data = &board->i2c_data; + board->i2c_adap.dev.parent = &efx->pci_dev->dev; + strlcpy(board->i2c_adap.name, "SFC4000 GPIO", + sizeof(board->i2c_adap.name)); + rc = i2c_bit_add_bus(&board->i2c_adap); + if (rc) + goto fail5; + + rc = falcon_board(efx)->type->init(efx); + if (rc) { + netif_err(efx, probe, efx->net_dev, + "failed to initialise board\n"); + goto fail6; + } + + nic_data->stats_disable_count = 1; + setup_timer(&nic_data->stats_timer, &falcon_stats_timer_func, + (unsigned long)efx); + + return 0; + + fail6: + BUG_ON(i2c_del_adapter(&board->i2c_adap)); + memset(&board->i2c_adap, 0, sizeof(board->i2c_adap)); + fail5: + efx_nic_free_buffer(efx, &efx->irq_status); + fail4: + fail3: + if (nic_data->pci_dev2) { + pci_dev_put(nic_data->pci_dev2); + nic_data->pci_dev2 = NULL; + } + fail2: + fail1: + kfree(efx->nic_data); + return rc; +} + +static void falcon_init_rx_cfg(struct efx_nic *efx) +{ + /* Prior to Siena the RX DMA engine will split each frame at + * intervals of RX_USR_BUF_SIZE (32-byte units). We set it to + * be so large that that never happens. */ + const unsigned huge_buf_size = (3 * 4096) >> 5; + /* RX control FIFO thresholds (32 entries) */ + const unsigned ctrl_xon_thr = 20; + const unsigned ctrl_xoff_thr = 25; + efx_oword_t reg; + + efx_reado(efx, ®, FR_AZ_RX_CFG); + if (efx_nic_rev(efx) <= EFX_REV_FALCON_A1) { + /* Data FIFO size is 5.5K */ + EFX_SET_OWORD_FIELD(reg, FRF_AA_RX_DESC_PUSH_EN, 0); + EFX_SET_OWORD_FIELD(reg, FRF_AA_RX_USR_BUF_SIZE, + huge_buf_size); + EFX_SET_OWORD_FIELD(reg, FRF_AA_RX_XON_MAC_TH, 512 >> 8); + EFX_SET_OWORD_FIELD(reg, FRF_AA_RX_XOFF_MAC_TH, 2048 >> 8); + EFX_SET_OWORD_FIELD(reg, FRF_AA_RX_XON_TX_TH, ctrl_xon_thr); + EFX_SET_OWORD_FIELD(reg, FRF_AA_RX_XOFF_TX_TH, ctrl_xoff_thr); + } else { + /* Data FIFO size is 80K; register fields moved */ + EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_DESC_PUSH_EN, 0); + EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_USR_BUF_SIZE, + huge_buf_size); + /* Send XON and XOFF at ~3 * max MTU away from empty/full */ + EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_XON_MAC_TH, 27648 >> 8); + EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_XOFF_MAC_TH, 54272 >> 8); + EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_XON_TX_TH, ctrl_xon_thr); + EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_XOFF_TX_TH, ctrl_xoff_thr); + EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_INGR_EN, 1); + + /* Enable hash insertion. This is broken for the + * 'Falcon' hash so also select Toeplitz TCP/IPv4 and + * IPv4 hashes. */ + EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_HASH_INSRT_HDR, 1); + EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_HASH_ALG, 1); + EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_IP_HASH, 1); + } + /* Always enable XOFF signal from RX FIFO. We enable + * or disable transmission of pause frames at the MAC. */ + EFX_SET_OWORD_FIELD(reg, FRF_AZ_RX_XOFF_MAC_EN, 1); + efx_writeo(efx, ®, FR_AZ_RX_CFG); +} + +/* This call performs hardware-specific global initialisation, such as + * defining the descriptor cache sizes and number of RSS channels. + * It does not set up any buffers, descriptor rings or event queues. + */ +static int falcon_init_nic(struct efx_nic *efx) +{ + efx_oword_t temp; + int rc; + + /* Use on-chip SRAM */ + efx_reado(efx, &temp, FR_AB_NIC_STAT); + EFX_SET_OWORD_FIELD(temp, FRF_AB_ONCHIP_SRAM, 1); + efx_writeo(efx, &temp, FR_AB_NIC_STAT); + + rc = falcon_reset_sram(efx); + if (rc) + return rc; + + /* Clear the parity enables on the TX data fifos as + * they produce false parity errors because of timing issues + */ + if (EFX_WORKAROUND_5129(efx)) { + efx_reado(efx, &temp, FR_AZ_CSR_SPARE); + EFX_SET_OWORD_FIELD(temp, FRF_AB_MEM_PERR_EN_TX_DATA, 0); + efx_writeo(efx, &temp, FR_AZ_CSR_SPARE); + } + + if (EFX_WORKAROUND_7244(efx)) { + efx_reado(efx, &temp, FR_BZ_RX_FILTER_CTL); + EFX_SET_OWORD_FIELD(temp, FRF_BZ_UDP_FULL_SRCH_LIMIT, 8); + EFX_SET_OWORD_FIELD(temp, FRF_BZ_UDP_WILD_SRCH_LIMIT, 8); + EFX_SET_OWORD_FIELD(temp, FRF_BZ_TCP_FULL_SRCH_LIMIT, 8); + EFX_SET_OWORD_FIELD(temp, FRF_BZ_TCP_WILD_SRCH_LIMIT, 8); + efx_writeo(efx, &temp, FR_BZ_RX_FILTER_CTL); + } + + /* XXX This is documented only for Falcon A0/A1 */ + /* Setup RX. Wait for descriptor is broken and must + * be disabled. RXDP recovery shouldn't be needed, but is. + */ + efx_reado(efx, &temp, FR_AA_RX_SELF_RST); + EFX_SET_OWORD_FIELD(temp, FRF_AA_RX_NODESC_WAIT_DIS, 1); + EFX_SET_OWORD_FIELD(temp, FRF_AA_RX_SELF_RST_EN, 1); + if (EFX_WORKAROUND_5583(efx)) + EFX_SET_OWORD_FIELD(temp, FRF_AA_RX_ISCSI_DIS, 1); + efx_writeo(efx, &temp, FR_AA_RX_SELF_RST); + + /* Do not enable TX_NO_EOP_DISC_EN, since it limits packets to 16 + * descriptors (which is bad). + */ + efx_reado(efx, &temp, FR_AZ_TX_CFG); + EFX_SET_OWORD_FIELD(temp, FRF_AZ_TX_NO_EOP_DISC_EN, 0); + efx_writeo(efx, &temp, FR_AZ_TX_CFG); + + falcon_init_rx_cfg(efx); + + if (efx_nic_rev(efx) >= EFX_REV_FALCON_B0) { + /* Set hash key for IPv4 */ + memcpy(&temp, efx->rx_hash_key, sizeof(temp)); + efx_writeo(efx, &temp, FR_BZ_RX_RSS_TKEY); + + /* Set destination of both TX and RX Flush events */ + EFX_POPULATE_OWORD_1(temp, FRF_BZ_FLS_EVQ_ID, 0); + efx_writeo(efx, &temp, FR_BZ_DP_CTRL); + } + + efx_nic_init_common(efx); + + return 0; +} + +static void falcon_remove_nic(struct efx_nic *efx) +{ + struct falcon_nic_data *nic_data = efx->nic_data; + struct falcon_board *board = falcon_board(efx); + int rc; + + board->type->fini(efx); + + /* Remove I2C adapter and clear it in preparation for a retry */ + rc = i2c_del_adapter(&board->i2c_adap); + BUG_ON(rc); + memset(&board->i2c_adap, 0, sizeof(board->i2c_adap)); + + efx_nic_free_buffer(efx, &efx->irq_status); + + __falcon_reset_hw(efx, RESET_TYPE_ALL); + + /* Release the second function after the reset */ + if (nic_data->pci_dev2) { + pci_dev_put(nic_data->pci_dev2); + nic_data->pci_dev2 = NULL; + } + + /* Tear down the private nic state */ + kfree(efx->nic_data); + efx->nic_data = NULL; +} + +static void falcon_update_nic_stats(struct efx_nic *efx) +{ + struct falcon_nic_data *nic_data = efx->nic_data; + efx_oword_t cnt; + + if (nic_data->stats_disable_count) + return; + + efx_reado(efx, &cnt, FR_AZ_RX_NODESC_DROP); + efx->n_rx_nodesc_drop_cnt += + EFX_OWORD_FIELD(cnt, FRF_AB_RX_NODESC_DROP_CNT); + + if (nic_data->stats_pending && + *nic_data->stats_dma_done == FALCON_STATS_DONE) { + nic_data->stats_pending = false; + rmb(); /* read the done flag before the stats */ + efx->mac_op->update_stats(efx); + } +} + +void falcon_start_nic_stats(struct efx_nic *efx) +{ + struct falcon_nic_data *nic_data = efx->nic_data; + + spin_lock_bh(&efx->stats_lock); + if (--nic_data->stats_disable_count == 0) + falcon_stats_request(efx); + spin_unlock_bh(&efx->stats_lock); +} + +void falcon_stop_nic_stats(struct efx_nic *efx) +{ + struct falcon_nic_data *nic_data = efx->nic_data; + int i; + + might_sleep(); + + spin_lock_bh(&efx->stats_lock); + ++nic_data->stats_disable_count; + spin_unlock_bh(&efx->stats_lock); + + del_timer_sync(&nic_data->stats_timer); + + /* Wait enough time for the most recent transfer to + * complete. */ + for (i = 0; i < 4 && nic_data->stats_pending; i++) { + if (*nic_data->stats_dma_done == FALCON_STATS_DONE) + break; + msleep(1); + } + + spin_lock_bh(&efx->stats_lock); + falcon_stats_complete(efx); + spin_unlock_bh(&efx->stats_lock); +} + +static void falcon_set_id_led(struct efx_nic *efx, enum efx_led_mode mode) +{ + falcon_board(efx)->type->set_id_led(efx, mode); +} + +/************************************************************************** + * + * Wake on LAN + * + ************************************************************************** + */ + +static void falcon_get_wol(struct efx_nic *efx, struct ethtool_wolinfo *wol) +{ + wol->supported = 0; + wol->wolopts = 0; + memset(&wol->sopass, 0, sizeof(wol->sopass)); +} + +static int falcon_set_wol(struct efx_nic *efx, u32 type) +{ + if (type != 0) + return -EINVAL; + return 0; +} + +/************************************************************************** + * + * Revision-dependent attributes used by efx.c and nic.c + * + ************************************************************************** + */ + +const struct efx_nic_type falcon_a1_nic_type = { + .probe = falcon_probe_nic, + .remove = falcon_remove_nic, + .init = falcon_init_nic, + .fini = efx_port_dummy_op_void, + .monitor = falcon_monitor, + .map_reset_reason = falcon_map_reset_reason, + .map_reset_flags = falcon_map_reset_flags, + .reset = falcon_reset_hw, + .probe_port = falcon_probe_port, + .remove_port = falcon_remove_port, + .handle_global_event = falcon_handle_global_event, + .prepare_flush = falcon_prepare_flush, + .update_stats = falcon_update_nic_stats, + .start_stats = falcon_start_nic_stats, + .stop_stats = falcon_stop_nic_stats, + .set_id_led = falcon_set_id_led, + .push_irq_moderation = falcon_push_irq_moderation, + .push_multicast_hash = falcon_push_multicast_hash, + .reconfigure_port = falcon_reconfigure_port, + .get_wol = falcon_get_wol, + .set_wol = falcon_set_wol, + .resume_wol = efx_port_dummy_op_void, + .test_nvram = falcon_test_nvram, + .default_mac_ops = &falcon_xmac_operations, + + .revision = EFX_REV_FALCON_A1, + .mem_map_size = 0x20000, + .txd_ptr_tbl_base = FR_AA_TX_DESC_PTR_TBL_KER, + .rxd_ptr_tbl_base = FR_AA_RX_DESC_PTR_TBL_KER, + .buf_tbl_base = FR_AA_BUF_FULL_TBL_KER, + .evq_ptr_tbl_base = FR_AA_EVQ_PTR_TBL_KER, + .evq_rptr_tbl_base = FR_AA_EVQ_RPTR_KER, + .max_dma_mask = DMA_BIT_MASK(FSF_AZ_TX_KER_BUF_ADDR_WIDTH), + .rx_buffer_padding = 0x24, + .max_interrupt_mode = EFX_INT_MODE_MSI, + .phys_addr_channels = 4, + .tx_dc_base = 0x130000, + .rx_dc_base = 0x100000, + .offload_features = NETIF_F_IP_CSUM, +}; + +const struct efx_nic_type falcon_b0_nic_type = { + .probe = falcon_probe_nic, + .remove = falcon_remove_nic, + .init = falcon_init_nic, + .fini = efx_port_dummy_op_void, + .monitor = falcon_monitor, + .map_reset_reason = falcon_map_reset_reason, + .map_reset_flags = falcon_map_reset_flags, + .reset = falcon_reset_hw, + .probe_port = falcon_probe_port, + .remove_port = falcon_remove_port, + .handle_global_event = falcon_handle_global_event, + .prepare_flush = falcon_prepare_flush, + .update_stats = falcon_update_nic_stats, + .start_stats = falcon_start_nic_stats, + .stop_stats = falcon_stop_nic_stats, + .set_id_led = falcon_set_id_led, + .push_irq_moderation = falcon_push_irq_moderation, + .push_multicast_hash = falcon_push_multicast_hash, + .reconfigure_port = falcon_reconfigure_port, + .get_wol = falcon_get_wol, + .set_wol = falcon_set_wol, + .resume_wol = efx_port_dummy_op_void, + .test_registers = falcon_b0_test_registers, + .test_nvram = falcon_test_nvram, + .default_mac_ops = &falcon_xmac_operations, + + .revision = EFX_REV_FALCON_B0, + /* Map everything up to and including the RSS indirection + * table. Don't map MSI-X table, MSI-X PBA since Linux + * requires that they not be mapped. */ + .mem_map_size = (FR_BZ_RX_INDIRECTION_TBL + + FR_BZ_RX_INDIRECTION_TBL_STEP * + FR_BZ_RX_INDIRECTION_TBL_ROWS), + .txd_ptr_tbl_base = FR_BZ_TX_DESC_PTR_TBL, + .rxd_ptr_tbl_base = FR_BZ_RX_DESC_PTR_TBL, + .buf_tbl_base = FR_BZ_BUF_FULL_TBL, + .evq_ptr_tbl_base = FR_BZ_EVQ_PTR_TBL, + .evq_rptr_tbl_base = FR_BZ_EVQ_RPTR, + .max_dma_mask = DMA_BIT_MASK(FSF_AZ_TX_KER_BUF_ADDR_WIDTH), + .rx_buffer_hash_size = 0x10, + .rx_buffer_padding = 0, + .max_interrupt_mode = EFX_INT_MODE_MSIX, + .phys_addr_channels = 32, /* Hardware limit is 64, but the legacy + * interrupt handler only supports 32 + * channels */ + .tx_dc_base = 0x130000, + .rx_dc_base = 0x100000, + .offload_features = NETIF_F_IP_CSUM | NETIF_F_RXHASH | NETIF_F_NTUPLE, +}; + |