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path: root/drivers/net/ethernet/sfc/ef100_nic.c
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Diffstat (limited to 'drivers/net/ethernet/sfc/ef100_nic.c')
-rw-r--r--drivers/net/ethernet/sfc/ef100_nic.c1278
1 files changed, 1278 insertions, 0 deletions
diff --git a/drivers/net/ethernet/sfc/ef100_nic.c b/drivers/net/ethernet/sfc/ef100_nic.c
new file mode 100644
index 000000000000..36598d0542ed
--- /dev/null
+++ b/drivers/net/ethernet/sfc/ef100_nic.c
@@ -0,0 +1,1278 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/****************************************************************************
+ * Driver for Solarflare network controllers and boards
+ * Copyright 2018 Solarflare Communications Inc.
+ * Copyright 2019-2020 Xilinx 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 "ef100_nic.h"
+#include "efx_common.h"
+#include "efx_channels.h"
+#include "io.h"
+#include "selftest.h"
+#include "ef100_regs.h"
+#include "mcdi.h"
+#include "mcdi_pcol.h"
+#include "mcdi_port_common.h"
+#include "mcdi_functions.h"
+#include "mcdi_filters.h"
+#include "ef100_rx.h"
+#include "ef100_tx.h"
+#include "ef100_netdev.h"
+
+#define EF100_MAX_VIS 4096
+#define EF100_NUM_MCDI_BUFFERS 1
+#define MCDI_BUF_LEN (8 + MCDI_CTL_SDU_LEN_MAX)
+
+#define EF100_RESET_PORT ((ETH_RESET_MAC | ETH_RESET_PHY) << ETH_RESET_SHARED_SHIFT)
+
+/* MCDI
+ */
+static u8 *ef100_mcdi_buf(struct efx_nic *efx, u8 bufid, dma_addr_t *dma_addr)
+{
+ struct ef100_nic_data *nic_data = efx->nic_data;
+
+ if (dma_addr)
+ *dma_addr = nic_data->mcdi_buf.dma_addr +
+ bufid * ALIGN(MCDI_BUF_LEN, 256);
+ return nic_data->mcdi_buf.addr + bufid * ALIGN(MCDI_BUF_LEN, 256);
+}
+
+static int ef100_get_warm_boot_count(struct efx_nic *efx)
+{
+ efx_dword_t reg;
+
+ efx_readd(efx, &reg, efx_reg(efx, ER_GZ_MC_SFT_STATUS));
+
+ if (EFX_DWORD_FIELD(reg, EFX_DWORD_0) == 0xffffffff) {
+ netif_err(efx, hw, efx->net_dev, "Hardware unavailable\n");
+ efx->state = STATE_DISABLED;
+ return -ENETDOWN;
+ } else {
+ return EFX_DWORD_FIELD(reg, EFX_WORD_1) == 0xb007 ?
+ EFX_DWORD_FIELD(reg, EFX_WORD_0) : -EIO;
+ }
+}
+
+static void ef100_mcdi_request(struct efx_nic *efx,
+ const efx_dword_t *hdr, size_t hdr_len,
+ const efx_dword_t *sdu, size_t sdu_len)
+{
+ dma_addr_t dma_addr;
+ u8 *pdu = ef100_mcdi_buf(efx, 0, &dma_addr);
+
+ memcpy(pdu, hdr, hdr_len);
+ memcpy(pdu + hdr_len, sdu, sdu_len);
+ wmb();
+
+ /* The hardware provides 'low' and 'high' (doorbell) registers
+ * for passing the 64-bit address of an MCDI request to
+ * firmware. However the dwords are swapped by firmware. The
+ * least significant bits of the doorbell are then 0 for all
+ * MCDI requests due to alignment.
+ */
+ _efx_writed(efx, cpu_to_le32((u64)dma_addr >> 32), efx_reg(efx, ER_GZ_MC_DB_LWRD));
+ _efx_writed(efx, cpu_to_le32((u32)dma_addr), efx_reg(efx, ER_GZ_MC_DB_HWRD));
+}
+
+static bool ef100_mcdi_poll_response(struct efx_nic *efx)
+{
+ const efx_dword_t hdr =
+ *(const efx_dword_t *)(ef100_mcdi_buf(efx, 0, NULL));
+
+ rmb();
+ return EFX_DWORD_FIELD(hdr, MCDI_HEADER_RESPONSE);
+}
+
+static void ef100_mcdi_read_response(struct efx_nic *efx,
+ efx_dword_t *outbuf, size_t offset,
+ size_t outlen)
+{
+ const u8 *pdu = ef100_mcdi_buf(efx, 0, NULL);
+
+ memcpy(outbuf, pdu + offset, outlen);
+}
+
+static int ef100_mcdi_poll_reboot(struct efx_nic *efx)
+{
+ struct ef100_nic_data *nic_data = efx->nic_data;
+ int rc;
+
+ rc = ef100_get_warm_boot_count(efx);
+ if (rc < 0) {
+ /* The firmware is presumably in the process of
+ * rebooting. However, we are supposed to report each
+ * reboot just once, so we must only do that once we
+ * can read and store the updated warm boot count.
+ */
+ return 0;
+ }
+
+ if (rc == nic_data->warm_boot_count)
+ return 0;
+
+ nic_data->warm_boot_count = rc;
+
+ return -EIO;
+}
+
+static void ef100_mcdi_reboot_detected(struct efx_nic *efx)
+{
+}
+
+/* MCDI calls
+ */
+static int ef100_get_mac_address(struct efx_nic *efx, u8 *mac_address)
+{
+ MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_MAC_ADDRESSES_OUT_LEN);
+ size_t outlen;
+ int rc;
+
+ BUILD_BUG_ON(MC_CMD_GET_MAC_ADDRESSES_IN_LEN != 0);
+
+ rc = efx_mcdi_rpc(efx, MC_CMD_GET_MAC_ADDRESSES, NULL, 0,
+ outbuf, sizeof(outbuf), &outlen);
+ if (rc)
+ return rc;
+ if (outlen < MC_CMD_GET_MAC_ADDRESSES_OUT_LEN)
+ return -EIO;
+
+ ether_addr_copy(mac_address,
+ MCDI_PTR(outbuf, GET_MAC_ADDRESSES_OUT_MAC_ADDR_BASE));
+ return 0;
+}
+
+static int efx_ef100_init_datapath_caps(struct efx_nic *efx)
+{
+ MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_CAPABILITIES_V7_OUT_LEN);
+ struct ef100_nic_data *nic_data = efx->nic_data;
+ u8 vi_window_mode;
+ size_t outlen;
+ int rc;
+
+ BUILD_BUG_ON(MC_CMD_GET_CAPABILITIES_IN_LEN != 0);
+
+ rc = efx_mcdi_rpc(efx, MC_CMD_GET_CAPABILITIES, NULL, 0,
+ outbuf, sizeof(outbuf), &outlen);
+ if (rc)
+ return rc;
+ if (outlen < MC_CMD_GET_CAPABILITIES_V4_OUT_LEN) {
+ netif_err(efx, drv, efx->net_dev,
+ "unable to read datapath firmware capabilities\n");
+ return -EIO;
+ }
+
+ nic_data->datapath_caps = MCDI_DWORD(outbuf,
+ GET_CAPABILITIES_OUT_FLAGS1);
+ nic_data->datapath_caps2 = MCDI_DWORD(outbuf,
+ GET_CAPABILITIES_V2_OUT_FLAGS2);
+ if (outlen < MC_CMD_GET_CAPABILITIES_V7_OUT_LEN)
+ nic_data->datapath_caps3 = 0;
+ else
+ nic_data->datapath_caps3 = MCDI_DWORD(outbuf,
+ GET_CAPABILITIES_V7_OUT_FLAGS3);
+
+ vi_window_mode = MCDI_BYTE(outbuf,
+ GET_CAPABILITIES_V3_OUT_VI_WINDOW_MODE);
+ rc = efx_mcdi_window_mode_to_stride(efx, vi_window_mode);
+ if (rc)
+ return rc;
+
+ if (efx_ef100_has_cap(nic_data->datapath_caps2, TX_TSO_V3))
+ efx->net_dev->features |= NETIF_F_TSO | NETIF_F_TSO6;
+ efx->num_mac_stats = MCDI_WORD(outbuf,
+ GET_CAPABILITIES_V4_OUT_MAC_STATS_NUM_STATS);
+ netif_dbg(efx, probe, efx->net_dev,
+ "firmware reports num_mac_stats = %u\n",
+ efx->num_mac_stats);
+ return 0;
+}
+
+/* Event handling
+ */
+static int ef100_ev_probe(struct efx_channel *channel)
+{
+ /* Allocate an extra descriptor for the QMDA status completion entry */
+ return efx_nic_alloc_buffer(channel->efx, &channel->eventq.buf,
+ (channel->eventq_mask + 2) *
+ sizeof(efx_qword_t),
+ GFP_KERNEL);
+}
+
+static int ef100_ev_init(struct efx_channel *channel)
+{
+ struct ef100_nic_data *nic_data = channel->efx->nic_data;
+
+ /* initial phase is 0 */
+ clear_bit(channel->channel, nic_data->evq_phases);
+
+ return efx_mcdi_ev_init(channel, false, false);
+}
+
+static void ef100_ev_read_ack(struct efx_channel *channel)
+{
+ efx_dword_t evq_prime;
+
+ EFX_POPULATE_DWORD_2(evq_prime,
+ ERF_GZ_EVQ_ID, channel->channel,
+ ERF_GZ_IDX, channel->eventq_read_ptr &
+ channel->eventq_mask);
+
+ efx_writed(channel->efx, &evq_prime,
+ efx_reg(channel->efx, ER_GZ_EVQ_INT_PRIME));
+}
+
+static int ef100_ev_process(struct efx_channel *channel, int quota)
+{
+ struct efx_nic *efx = channel->efx;
+ struct ef100_nic_data *nic_data;
+ bool evq_phase, old_evq_phase;
+ unsigned int read_ptr;
+ efx_qword_t *p_event;
+ int spent = 0;
+ bool ev_phase;
+ int ev_type;
+
+ if (unlikely(!channel->enabled))
+ return 0;
+
+ nic_data = efx->nic_data;
+ evq_phase = test_bit(channel->channel, nic_data->evq_phases);
+ old_evq_phase = evq_phase;
+ read_ptr = channel->eventq_read_ptr;
+ BUILD_BUG_ON(ESF_GZ_EV_RXPKTS_PHASE_LBN != ESF_GZ_EV_TXCMPL_PHASE_LBN);
+
+ while (spent < quota) {
+ p_event = efx_event(channel, read_ptr);
+
+ ev_phase = !!EFX_QWORD_FIELD(*p_event, ESF_GZ_EV_RXPKTS_PHASE);
+ if (ev_phase != evq_phase)
+ break;
+
+ netif_vdbg(efx, drv, efx->net_dev,
+ "processing event on %d " EFX_QWORD_FMT "\n",
+ channel->channel, EFX_QWORD_VAL(*p_event));
+
+ ev_type = EFX_QWORD_FIELD(*p_event, ESF_GZ_E_TYPE);
+
+ switch (ev_type) {
+ case ESE_GZ_EF100_EV_RX_PKTS:
+ efx_ef100_ev_rx(channel, p_event);
+ ++spent;
+ break;
+ case ESE_GZ_EF100_EV_MCDI:
+ efx_mcdi_process_event(channel, p_event);
+ break;
+ case ESE_GZ_EF100_EV_TX_COMPLETION:
+ ef100_ev_tx(channel, p_event);
+ break;
+ case ESE_GZ_EF100_EV_DRIVER:
+ netif_info(efx, drv, efx->net_dev,
+ "Driver initiated event " EFX_QWORD_FMT "\n",
+ EFX_QWORD_VAL(*p_event));
+ break;
+ default:
+ netif_info(efx, drv, efx->net_dev,
+ "Unhandled event " EFX_QWORD_FMT "\n",
+ EFX_QWORD_VAL(*p_event));
+ }
+
+ ++read_ptr;
+ if ((read_ptr & channel->eventq_mask) == 0)
+ evq_phase = !evq_phase;
+ }
+
+ channel->eventq_read_ptr = read_ptr;
+ if (evq_phase != old_evq_phase)
+ change_bit(channel->channel, nic_data->evq_phases);
+
+ return spent;
+}
+
+static irqreturn_t ef100_msi_interrupt(int irq, void *dev_id)
+{
+ struct efx_msi_context *context = dev_id;
+ struct efx_nic *efx = context->efx;
+
+ netif_vdbg(efx, intr, efx->net_dev,
+ "IRQ %d on CPU %d\n", irq, raw_smp_processor_id());
+
+ if (likely(READ_ONCE(efx->irq_soft_enabled))) {
+ /* Note test interrupts */
+ if (context->index == efx->irq_level)
+ efx->last_irq_cpu = raw_smp_processor_id();
+
+ /* Schedule processing of the channel */
+ efx_schedule_channel_irq(efx->channel[context->index]);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static int ef100_phy_probe(struct efx_nic *efx)
+{
+ struct efx_mcdi_phy_data *phy_data;
+ int rc;
+
+ /* Probe for the PHY */
+ efx->phy_data = kzalloc(sizeof(struct efx_mcdi_phy_data), GFP_KERNEL);
+ if (!efx->phy_data)
+ return -ENOMEM;
+
+ rc = efx_mcdi_get_phy_cfg(efx, efx->phy_data);
+ if (rc)
+ return rc;
+
+ /* Populate driver and ethtool settings */
+ phy_data = efx->phy_data;
+ mcdi_to_ethtool_linkset(phy_data->media, phy_data->supported_cap,
+ efx->link_advertising);
+ efx->fec_config = mcdi_fec_caps_to_ethtool(phy_data->supported_cap,
+ false);
+
+ /* Default to Autonegotiated flow control if the PHY supports it */
+ efx->wanted_fc = EFX_FC_RX | EFX_FC_TX;
+ if (phy_data->supported_cap & (1 << MC_CMD_PHY_CAP_AN_LBN))
+ efx->wanted_fc |= EFX_FC_AUTO;
+ efx_link_set_wanted_fc(efx, efx->wanted_fc);
+
+ /* Push settings to the PHY. Failure is not fatal, the user can try to
+ * fix it using ethtool.
+ */
+ rc = efx_mcdi_port_reconfigure(efx);
+ if (rc && rc != -EPERM)
+ netif_warn(efx, drv, efx->net_dev,
+ "could not initialise PHY settings\n");
+
+ return 0;
+}
+
+static int ef100_filter_table_probe(struct efx_nic *efx)
+{
+ return efx_mcdi_filter_table_probe(efx, true);
+}
+
+static int ef100_filter_table_up(struct efx_nic *efx)
+{
+ int rc;
+
+ rc = efx_mcdi_filter_add_vlan(efx, EFX_FILTER_VID_UNSPEC);
+ if (rc) {
+ efx_mcdi_filter_table_down(efx);
+ return rc;
+ }
+
+ rc = efx_mcdi_filter_add_vlan(efx, 0);
+ if (rc) {
+ efx_mcdi_filter_del_vlan(efx, EFX_FILTER_VID_UNSPEC);
+ efx_mcdi_filter_table_down(efx);
+ }
+
+ return rc;
+}
+
+static void ef100_filter_table_down(struct efx_nic *efx)
+{
+ efx_mcdi_filter_del_vlan(efx, 0);
+ efx_mcdi_filter_del_vlan(efx, EFX_FILTER_VID_UNSPEC);
+ efx_mcdi_filter_table_down(efx);
+}
+
+/* Other
+ */
+static int ef100_reconfigure_mac(struct efx_nic *efx, bool mtu_only)
+{
+ WARN_ON(!mutex_is_locked(&efx->mac_lock));
+
+ efx_mcdi_filter_sync_rx_mode(efx);
+
+ if (mtu_only && efx_has_cap(efx, SET_MAC_ENHANCED))
+ return efx_mcdi_set_mtu(efx);
+ return efx_mcdi_set_mac(efx);
+}
+
+static enum reset_type ef100_map_reset_reason(enum reset_type reason)
+{
+ if (reason == RESET_TYPE_TX_WATCHDOG)
+ return reason;
+ return RESET_TYPE_DISABLE;
+}
+
+static int ef100_map_reset_flags(u32 *flags)
+{
+ /* Only perform a RESET_TYPE_ALL because we don't support MC_REBOOTs */
+ if ((*flags & EF100_RESET_PORT)) {
+ *flags &= ~EF100_RESET_PORT;
+ return RESET_TYPE_ALL;
+ }
+ if (*flags & ETH_RESET_MGMT) {
+ *flags &= ~ETH_RESET_MGMT;
+ return RESET_TYPE_DISABLE;
+ }
+
+ return -EINVAL;
+}
+
+static int ef100_reset(struct efx_nic *efx, enum reset_type reset_type)
+{
+ int rc;
+
+ dev_close(efx->net_dev);
+
+ if (reset_type == RESET_TYPE_TX_WATCHDOG) {
+ netif_device_attach(efx->net_dev);
+ __clear_bit(reset_type, &efx->reset_pending);
+ rc = dev_open(efx->net_dev, NULL);
+ } else if (reset_type == RESET_TYPE_ALL) {
+ /* A RESET_TYPE_ALL will cause filters to be removed, so we remove filters
+ * and reprobe after reset to avoid removing filters twice
+ */
+ down_read(&efx->filter_sem);
+ ef100_filter_table_down(efx);
+ up_read(&efx->filter_sem);
+ rc = efx_mcdi_reset(efx, reset_type);
+ if (rc)
+ return rc;
+
+ netif_device_attach(efx->net_dev);
+
+ down_read(&efx->filter_sem);
+ rc = ef100_filter_table_up(efx);
+ up_read(&efx->filter_sem);
+ if (rc)
+ return rc;
+
+ rc = dev_open(efx->net_dev, NULL);
+ } else {
+ rc = 1; /* Leave the device closed */
+ }
+ return rc;
+}
+
+static void ef100_common_stat_mask(unsigned long *mask)
+{
+ __set_bit(EF100_STAT_port_rx_packets, mask);
+ __set_bit(EF100_STAT_port_tx_packets, mask);
+ __set_bit(EF100_STAT_port_rx_bytes, mask);
+ __set_bit(EF100_STAT_port_tx_bytes, mask);
+ __set_bit(EF100_STAT_port_rx_multicast, mask);
+ __set_bit(EF100_STAT_port_rx_bad, mask);
+ __set_bit(EF100_STAT_port_rx_align_error, mask);
+ __set_bit(EF100_STAT_port_rx_overflow, mask);
+}
+
+static void ef100_ethtool_stat_mask(unsigned long *mask)
+{
+ __set_bit(EF100_STAT_port_tx_pause, mask);
+ __set_bit(EF100_STAT_port_tx_unicast, mask);
+ __set_bit(EF100_STAT_port_tx_multicast, mask);
+ __set_bit(EF100_STAT_port_tx_broadcast, mask);
+ __set_bit(EF100_STAT_port_tx_lt64, mask);
+ __set_bit(EF100_STAT_port_tx_64, mask);
+ __set_bit(EF100_STAT_port_tx_65_to_127, mask);
+ __set_bit(EF100_STAT_port_tx_128_to_255, mask);
+ __set_bit(EF100_STAT_port_tx_256_to_511, mask);
+ __set_bit(EF100_STAT_port_tx_512_to_1023, mask);
+ __set_bit(EF100_STAT_port_tx_1024_to_15xx, mask);
+ __set_bit(EF100_STAT_port_tx_15xx_to_jumbo, mask);
+ __set_bit(EF100_STAT_port_rx_good, mask);
+ __set_bit(EF100_STAT_port_rx_pause, mask);
+ __set_bit(EF100_STAT_port_rx_unicast, mask);
+ __set_bit(EF100_STAT_port_rx_broadcast, mask);
+ __set_bit(EF100_STAT_port_rx_lt64, mask);
+ __set_bit(EF100_STAT_port_rx_64, mask);
+ __set_bit(EF100_STAT_port_rx_65_to_127, mask);
+ __set_bit(EF100_STAT_port_rx_128_to_255, mask);
+ __set_bit(EF100_STAT_port_rx_256_to_511, mask);
+ __set_bit(EF100_STAT_port_rx_512_to_1023, mask);
+ __set_bit(EF100_STAT_port_rx_1024_to_15xx, mask);
+ __set_bit(EF100_STAT_port_rx_15xx_to_jumbo, mask);
+ __set_bit(EF100_STAT_port_rx_gtjumbo, mask);
+ __set_bit(EF100_STAT_port_rx_bad_gtjumbo, mask);
+ __set_bit(EF100_STAT_port_rx_length_error, mask);
+ __set_bit(EF100_STAT_port_rx_nodesc_drops, mask);
+ __set_bit(GENERIC_STAT_rx_nodesc_trunc, mask);
+ __set_bit(GENERIC_STAT_rx_noskb_drops, mask);
+}
+
+#define EF100_DMA_STAT(ext_name, mcdi_name) \
+ [EF100_STAT_ ## ext_name] = \
+ { #ext_name, 64, 8 * MC_CMD_MAC_ ## mcdi_name }
+
+static const struct efx_hw_stat_desc ef100_stat_desc[EF100_STAT_COUNT] = {
+ EF100_DMA_STAT(port_tx_bytes, TX_BYTES),
+ EF100_DMA_STAT(port_tx_packets, TX_PKTS),
+ EF100_DMA_STAT(port_tx_pause, TX_PAUSE_PKTS),
+ EF100_DMA_STAT(port_tx_unicast, TX_UNICAST_PKTS),
+ EF100_DMA_STAT(port_tx_multicast, TX_MULTICAST_PKTS),
+ EF100_DMA_STAT(port_tx_broadcast, TX_BROADCAST_PKTS),
+ EF100_DMA_STAT(port_tx_lt64, TX_LT64_PKTS),
+ EF100_DMA_STAT(port_tx_64, TX_64_PKTS),
+ EF100_DMA_STAT(port_tx_65_to_127, TX_65_TO_127_PKTS),
+ EF100_DMA_STAT(port_tx_128_to_255, TX_128_TO_255_PKTS),
+ EF100_DMA_STAT(port_tx_256_to_511, TX_256_TO_511_PKTS),
+ EF100_DMA_STAT(port_tx_512_to_1023, TX_512_TO_1023_PKTS),
+ EF100_DMA_STAT(port_tx_1024_to_15xx, TX_1024_TO_15XX_PKTS),
+ EF100_DMA_STAT(port_tx_15xx_to_jumbo, TX_15XX_TO_JUMBO_PKTS),
+ EF100_DMA_STAT(port_rx_bytes, RX_BYTES),
+ EF100_DMA_STAT(port_rx_packets, RX_PKTS),
+ EF100_DMA_STAT(port_rx_good, RX_GOOD_PKTS),
+ EF100_DMA_STAT(port_rx_bad, RX_BAD_FCS_PKTS),
+ EF100_DMA_STAT(port_rx_pause, RX_PAUSE_PKTS),
+ EF100_DMA_STAT(port_rx_unicast, RX_UNICAST_PKTS),
+ EF100_DMA_STAT(port_rx_multicast, RX_MULTICAST_PKTS),
+ EF100_DMA_STAT(port_rx_broadcast, RX_BROADCAST_PKTS),
+ EF100_DMA_STAT(port_rx_lt64, RX_UNDERSIZE_PKTS),
+ EF100_DMA_STAT(port_rx_64, RX_64_PKTS),
+ EF100_DMA_STAT(port_rx_65_to_127, RX_65_TO_127_PKTS),
+ EF100_DMA_STAT(port_rx_128_to_255, RX_128_TO_255_PKTS),
+ EF100_DMA_STAT(port_rx_256_to_511, RX_256_TO_511_PKTS),
+ EF100_DMA_STAT(port_rx_512_to_1023, RX_512_TO_1023_PKTS),
+ EF100_DMA_STAT(port_rx_1024_to_15xx, RX_1024_TO_15XX_PKTS),
+ EF100_DMA_STAT(port_rx_15xx_to_jumbo, RX_15XX_TO_JUMBO_PKTS),
+ EF100_DMA_STAT(port_rx_gtjumbo, RX_GTJUMBO_PKTS),
+ EF100_DMA_STAT(port_rx_bad_gtjumbo, RX_JABBER_PKTS),
+ EF100_DMA_STAT(port_rx_align_error, RX_ALIGN_ERROR_PKTS),
+ EF100_DMA_STAT(port_rx_length_error, RX_LENGTH_ERROR_PKTS),
+ EF100_DMA_STAT(port_rx_overflow, RX_OVERFLOW_PKTS),
+ EF100_DMA_STAT(port_rx_nodesc_drops, RX_NODESC_DROPS),
+ EFX_GENERIC_SW_STAT(rx_nodesc_trunc),
+ EFX_GENERIC_SW_STAT(rx_noskb_drops),
+};
+
+static size_t ef100_describe_stats(struct efx_nic *efx, u8 *names)
+{
+ DECLARE_BITMAP(mask, EF100_STAT_COUNT) = {};
+
+ ef100_ethtool_stat_mask(mask);
+ return efx_nic_describe_stats(ef100_stat_desc, EF100_STAT_COUNT,
+ mask, names);
+}
+
+static size_t ef100_update_stats_common(struct efx_nic *efx, u64 *full_stats,
+ struct rtnl_link_stats64 *core_stats)
+{
+ struct ef100_nic_data *nic_data = efx->nic_data;
+ DECLARE_BITMAP(mask, EF100_STAT_COUNT) = {};
+ size_t stats_count = 0, index;
+ u64 *stats = nic_data->stats;
+
+ ef100_ethtool_stat_mask(mask);
+
+ if (full_stats) {
+ for_each_set_bit(index, mask, EF100_STAT_COUNT) {
+ if (ef100_stat_desc[index].name) {
+ *full_stats++ = stats[index];
+ ++stats_count;
+ }
+ }
+ }
+
+ if (!core_stats)
+ return stats_count;
+
+ core_stats->rx_packets = stats[EF100_STAT_port_rx_packets];
+ core_stats->tx_packets = stats[EF100_STAT_port_tx_packets];
+ core_stats->rx_bytes = stats[EF100_STAT_port_rx_bytes];
+ core_stats->tx_bytes = stats[EF100_STAT_port_tx_bytes];
+ core_stats->rx_dropped = stats[EF100_STAT_port_rx_nodesc_drops] +
+ stats[GENERIC_STAT_rx_nodesc_trunc] +
+ stats[GENERIC_STAT_rx_noskb_drops];
+ core_stats->multicast = stats[EF100_STAT_port_rx_multicast];
+ core_stats->rx_length_errors =
+ stats[EF100_STAT_port_rx_gtjumbo] +
+ stats[EF100_STAT_port_rx_length_error];
+ core_stats->rx_crc_errors = stats[EF100_STAT_port_rx_bad];
+ core_stats->rx_frame_errors =
+ stats[EF100_STAT_port_rx_align_error];
+ core_stats->rx_fifo_errors = stats[EF100_STAT_port_rx_overflow];
+ core_stats->rx_errors = (core_stats->rx_length_errors +
+ core_stats->rx_crc_errors +
+ core_stats->rx_frame_errors);
+
+ return stats_count;
+}
+
+static size_t ef100_update_stats(struct efx_nic *efx,
+ u64 *full_stats,
+ struct rtnl_link_stats64 *core_stats)
+{
+ __le64 *mc_stats = kmalloc(array_size(efx->num_mac_stats, sizeof(__le64)), GFP_ATOMIC);
+ struct ef100_nic_data *nic_data = efx->nic_data;
+ DECLARE_BITMAP(mask, EF100_STAT_COUNT) = {};
+ u64 *stats = nic_data->stats;
+
+ ef100_common_stat_mask(mask);
+ ef100_ethtool_stat_mask(mask);
+
+ efx_nic_copy_stats(efx, mc_stats);
+ efx_nic_update_stats(ef100_stat_desc, EF100_STAT_COUNT, mask,
+ stats, mc_stats, false);
+
+ kfree(mc_stats);
+
+ return ef100_update_stats_common(efx, full_stats, core_stats);
+}
+
+static int efx_ef100_get_phys_port_id(struct efx_nic *efx,
+ struct netdev_phys_item_id *ppid)
+{
+ struct ef100_nic_data *nic_data = efx->nic_data;
+
+ if (!is_valid_ether_addr(nic_data->port_id))
+ return -EOPNOTSUPP;
+
+ ppid->id_len = ETH_ALEN;
+ memcpy(ppid->id, nic_data->port_id, ppid->id_len);
+
+ return 0;
+}
+
+static int efx_ef100_irq_test_generate(struct efx_nic *efx)
+{
+ MCDI_DECLARE_BUF(inbuf, MC_CMD_TRIGGER_INTERRUPT_IN_LEN);
+
+ BUILD_BUG_ON(MC_CMD_TRIGGER_INTERRUPT_OUT_LEN != 0);
+
+ MCDI_SET_DWORD(inbuf, TRIGGER_INTERRUPT_IN_INTR_LEVEL, efx->irq_level);
+ return efx_mcdi_rpc_quiet(efx, MC_CMD_TRIGGER_INTERRUPT,
+ inbuf, sizeof(inbuf), NULL, 0, NULL);
+}
+
+#define EFX_EF100_TEST 1
+
+static void efx_ef100_ev_test_generate(struct efx_channel *channel)
+{
+ MCDI_DECLARE_BUF(inbuf, MC_CMD_DRIVER_EVENT_IN_LEN);
+ struct efx_nic *efx = channel->efx;
+ efx_qword_t event;
+ int rc;
+
+ EFX_POPULATE_QWORD_2(event,
+ ESF_GZ_E_TYPE, ESE_GZ_EF100_EV_DRIVER,
+ ESF_GZ_DRIVER_DATA, EFX_EF100_TEST);
+
+ MCDI_SET_DWORD(inbuf, DRIVER_EVENT_IN_EVQ, channel->channel);
+
+ /* MCDI_SET_QWORD is not appropriate here since EFX_POPULATE_* has
+ * already swapped the data to little-endian order.
+ */
+ memcpy(MCDI_PTR(inbuf, DRIVER_EVENT_IN_DATA), &event.u64[0],
+ sizeof(efx_qword_t));
+
+ rc = efx_mcdi_rpc(efx, MC_CMD_DRIVER_EVENT, inbuf, sizeof(inbuf),
+ NULL, 0, NULL);
+ if (rc && (rc != -ENETDOWN))
+ goto fail;
+
+ return;
+
+fail:
+ WARN_ON(true);
+ netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);
+}
+
+static unsigned int ef100_check_caps(const struct efx_nic *efx,
+ u8 flag, u32 offset)
+{
+ const struct ef100_nic_data *nic_data = efx->nic_data;
+
+ switch (offset) {
+ case MC_CMD_GET_CAPABILITIES_V8_OUT_FLAGS1_OFST:
+ return nic_data->datapath_caps & BIT_ULL(flag);
+ case MC_CMD_GET_CAPABILITIES_V8_OUT_FLAGS2_OFST:
+ return nic_data->datapath_caps2 & BIT_ULL(flag);
+ case MC_CMD_GET_CAPABILITIES_V8_OUT_FLAGS3_OFST:
+ return nic_data->datapath_caps3 & BIT_ULL(flag);
+ default:
+ return 0;
+ }
+}
+
+/* NIC level access functions
+ */
+#define EF100_OFFLOAD_FEATURES (NETIF_F_HW_CSUM | NETIF_F_RXCSUM | \
+ NETIF_F_HIGHDMA | NETIF_F_SG | NETIF_F_FRAGLIST | \
+ NETIF_F_RXHASH | NETIF_F_RXFCS | NETIF_F_TSO_ECN | NETIF_F_RXALL | \
+ NETIF_F_TSO_MANGLEID | NETIF_F_HW_VLAN_CTAG_TX)
+
+const struct efx_nic_type ef100_pf_nic_type = {
+ .revision = EFX_REV_EF100,
+ .is_vf = false,
+ .probe = ef100_probe_pf,
+ .offload_features = EF100_OFFLOAD_FEATURES,
+ .mcdi_max_ver = 2,
+ .mcdi_request = ef100_mcdi_request,
+ .mcdi_poll_response = ef100_mcdi_poll_response,
+ .mcdi_read_response = ef100_mcdi_read_response,
+ .mcdi_poll_reboot = ef100_mcdi_poll_reboot,
+ .mcdi_reboot_detected = ef100_mcdi_reboot_detected,
+ .irq_enable_master = efx_port_dummy_op_void,
+ .irq_test_generate = efx_ef100_irq_test_generate,
+ .irq_disable_non_ev = efx_port_dummy_op_void,
+ .push_irq_moderation = efx_channel_dummy_op_void,
+ .min_interrupt_mode = EFX_INT_MODE_MSIX,
+ .map_reset_reason = ef100_map_reset_reason,
+ .map_reset_flags = ef100_map_reset_flags,
+ .reset = ef100_reset,
+
+ .check_caps = ef100_check_caps,
+
+ .ev_probe = ef100_ev_probe,
+ .ev_init = ef100_ev_init,
+ .ev_fini = efx_mcdi_ev_fini,
+ .ev_remove = efx_mcdi_ev_remove,
+ .irq_handle_msi = ef100_msi_interrupt,
+ .ev_process = ef100_ev_process,
+ .ev_read_ack = ef100_ev_read_ack,
+ .ev_test_generate = efx_ef100_ev_test_generate,
+ .tx_probe = ef100_tx_probe,
+ .tx_init = ef100_tx_init,
+ .tx_write = ef100_tx_write,
+ .tx_enqueue = ef100_enqueue_skb,
+ .rx_probe = efx_mcdi_rx_probe,
+ .rx_init = efx_mcdi_rx_init,
+ .rx_remove = efx_mcdi_rx_remove,
+ .rx_write = ef100_rx_write,
+ .rx_packet = __ef100_rx_packet,
+ .fini_dmaq = efx_fini_dmaq,
+ .max_rx_ip_filters = EFX_MCDI_FILTER_TBL_ROWS,
+ .filter_table_probe = ef100_filter_table_up,
+ .filter_table_restore = efx_mcdi_filter_table_restore,
+ .filter_table_remove = ef100_filter_table_down,
+ .filter_insert = efx_mcdi_filter_insert,
+ .filter_remove_safe = efx_mcdi_filter_remove_safe,
+ .filter_get_safe = efx_mcdi_filter_get_safe,
+ .filter_clear_rx = efx_mcdi_filter_clear_rx,
+ .filter_count_rx_used = efx_mcdi_filter_count_rx_used,
+ .filter_get_rx_id_limit = efx_mcdi_filter_get_rx_id_limit,
+ .filter_get_rx_ids = efx_mcdi_filter_get_rx_ids,
+#ifdef CONFIG_RFS_ACCEL
+ .filter_rfs_expire_one = efx_mcdi_filter_rfs_expire_one,
+#endif
+
+ .get_phys_port_id = efx_ef100_get_phys_port_id,
+
+ .rx_prefix_size = ESE_GZ_RX_PKT_PREFIX_LEN,
+ .rx_hash_offset = ESF_GZ_RX_PREFIX_RSS_HASH_LBN / 8,
+ .rx_ts_offset = ESF_GZ_RX_PREFIX_PARTIAL_TSTAMP_LBN / 8,
+ .rx_hash_key_size = 40,
+ .rx_pull_rss_config = efx_mcdi_rx_pull_rss_config,
+ .rx_push_rss_config = efx_mcdi_pf_rx_push_rss_config,
+ .rx_push_rss_context_config = efx_mcdi_rx_push_rss_context_config,
+ .rx_pull_rss_context_config = efx_mcdi_rx_pull_rss_context_config,
+ .rx_restore_rss_contexts = efx_mcdi_rx_restore_rss_contexts,
+
+ .reconfigure_mac = ef100_reconfigure_mac,
+ .test_nvram = efx_new_mcdi_nvram_test_all,
+ .describe_stats = ef100_describe_stats,
+ .start_stats = efx_mcdi_mac_start_stats,
+ .update_stats = ef100_update_stats,
+ .pull_stats = efx_mcdi_mac_pull_stats,
+ .stop_stats = efx_mcdi_mac_stop_stats,
+
+ /* Per-type bar/size configuration not used on ef100. Location of
+ * registers is defined by extended capabilities.
+ */
+ .mem_bar = NULL,
+ .mem_map_size = NULL,
+
+};
+
+const struct efx_nic_type ef100_vf_nic_type = {
+ .revision = EFX_REV_EF100,
+ .is_vf = true,
+ .probe = ef100_probe_vf,
+ .offload_features = EF100_OFFLOAD_FEATURES,
+ .mcdi_max_ver = 2,
+ .mcdi_request = ef100_mcdi_request,
+ .mcdi_poll_response = ef100_mcdi_poll_response,
+ .mcdi_read_response = ef100_mcdi_read_response,
+ .mcdi_poll_reboot = ef100_mcdi_poll_reboot,
+ .mcdi_reboot_detected = ef100_mcdi_reboot_detected,
+ .irq_enable_master = efx_port_dummy_op_void,
+ .irq_test_generate = efx_ef100_irq_test_generate,
+ .irq_disable_non_ev = efx_port_dummy_op_void,
+ .push_irq_moderation = efx_channel_dummy_op_void,
+ .min_interrupt_mode = EFX_INT_MODE_MSIX,
+ .map_reset_reason = ef100_map_reset_reason,
+ .map_reset_flags = ef100_map_reset_flags,
+ .reset = ef100_reset,
+ .check_caps = ef100_check_caps,
+ .ev_probe = ef100_ev_probe,
+ .ev_init = ef100_ev_init,
+ .ev_fini = efx_mcdi_ev_fini,
+ .ev_remove = efx_mcdi_ev_remove,
+ .irq_handle_msi = ef100_msi_interrupt,
+ .ev_process = ef100_ev_process,
+ .ev_read_ack = ef100_ev_read_ack,
+ .ev_test_generate = efx_ef100_ev_test_generate,
+ .tx_probe = ef100_tx_probe,
+ .tx_init = ef100_tx_init,
+ .tx_write = ef100_tx_write,
+ .tx_enqueue = ef100_enqueue_skb,
+ .rx_probe = efx_mcdi_rx_probe,
+ .rx_init = efx_mcdi_rx_init,
+ .rx_remove = efx_mcdi_rx_remove,
+ .rx_write = ef100_rx_write,
+ .rx_packet = __ef100_rx_packet,
+ .fini_dmaq = efx_fini_dmaq,
+ .max_rx_ip_filters = EFX_MCDI_FILTER_TBL_ROWS,
+ .filter_table_probe = ef100_filter_table_up,
+ .filter_table_restore = efx_mcdi_filter_table_restore,
+ .filter_table_remove = ef100_filter_table_down,
+ .filter_insert = efx_mcdi_filter_insert,
+ .filter_remove_safe = efx_mcdi_filter_remove_safe,
+ .filter_get_safe = efx_mcdi_filter_get_safe,
+ .filter_clear_rx = efx_mcdi_filter_clear_rx,
+ .filter_count_rx_used = efx_mcdi_filter_count_rx_used,
+ .filter_get_rx_id_limit = efx_mcdi_filter_get_rx_id_limit,
+ .filter_get_rx_ids = efx_mcdi_filter_get_rx_ids,
+#ifdef CONFIG_RFS_ACCEL
+ .filter_rfs_expire_one = efx_mcdi_filter_rfs_expire_one,
+#endif
+
+ .rx_prefix_size = ESE_GZ_RX_PKT_PREFIX_LEN,
+ .rx_hash_offset = ESF_GZ_RX_PREFIX_RSS_HASH_LBN / 8,
+ .rx_ts_offset = ESF_GZ_RX_PREFIX_PARTIAL_TSTAMP_LBN / 8,
+ .rx_hash_key_size = 40,
+ .rx_pull_rss_config = efx_mcdi_rx_pull_rss_config,
+ .rx_push_rss_config = efx_mcdi_pf_rx_push_rss_config,
+ .rx_restore_rss_contexts = efx_mcdi_rx_restore_rss_contexts,
+
+ .reconfigure_mac = ef100_reconfigure_mac,
+ .test_nvram = efx_new_mcdi_nvram_test_all,
+ .describe_stats = ef100_describe_stats,
+ .start_stats = efx_mcdi_mac_start_stats,
+ .update_stats = ef100_update_stats,
+ .pull_stats = efx_mcdi_mac_pull_stats,
+ .stop_stats = efx_mcdi_mac_stop_stats,
+
+ .mem_bar = NULL,
+ .mem_map_size = NULL,
+
+};
+
+static int compare_versions(const char *a, const char *b)
+{
+ int a_major, a_minor, a_point, a_patch;
+ int b_major, b_minor, b_point, b_patch;
+ int a_matched, b_matched;
+
+ a_matched = sscanf(a, "%d.%d.%d.%d", &a_major, &a_minor, &a_point, &a_patch);
+ b_matched = sscanf(b, "%d.%d.%d.%d", &b_major, &b_minor, &b_point, &b_patch);
+
+ if (a_matched == 4 && b_matched != 4)
+ return +1;
+
+ if (a_matched != 4 && b_matched == 4)
+ return -1;
+
+ if (a_matched != 4 && b_matched != 4)
+ return 0;
+
+ if (a_major != b_major)
+ return a_major - b_major;
+
+ if (a_minor != b_minor)
+ return a_minor - b_minor;
+
+ if (a_point != b_point)
+ return a_point - b_point;
+
+ return a_patch - b_patch;
+}
+
+enum ef100_tlv_state_machine {
+ EF100_TLV_TYPE,
+ EF100_TLV_TYPE_CONT,
+ EF100_TLV_LENGTH,
+ EF100_TLV_VALUE
+};
+
+struct ef100_tlv_state {
+ enum ef100_tlv_state_machine state;
+ u64 value;
+ u32 value_offset;
+ u16 type;
+ u8 len;
+};
+
+static int ef100_tlv_feed(struct ef100_tlv_state *state, u8 byte)
+{
+ switch (state->state) {
+ case EF100_TLV_TYPE:
+ state->type = byte & 0x7f;
+ state->state = (byte & 0x80) ? EF100_TLV_TYPE_CONT
+ : EF100_TLV_LENGTH;
+ /* Clear ready to read in a new entry */
+ state->value = 0;
+ state->value_offset = 0;
+ return 0;
+ case EF100_TLV_TYPE_CONT:
+ state->type |= byte << 7;
+ state->state = EF100_TLV_LENGTH;
+ return 0;
+ case EF100_TLV_LENGTH:
+ state->len = byte;
+ /* We only handle TLVs that fit in a u64 */
+ if (state->len > sizeof(state->value))
+ return -EOPNOTSUPP;
+ /* len may be zero, implying a value of zero */
+ state->state = state->len ? EF100_TLV_VALUE : EF100_TLV_TYPE;
+ return 0;
+ case EF100_TLV_VALUE:
+ state->value |= ((u64)byte) << (state->value_offset * 8);
+ state->value_offset++;
+ if (state->value_offset >= state->len)
+ state->state = EF100_TLV_TYPE;
+ return 0;
+ default: /* state machine error, can't happen */
+ WARN_ON_ONCE(1);
+ return -EIO;
+ }
+}
+
+static int ef100_process_design_param(struct efx_nic *efx,
+ const struct ef100_tlv_state *reader)
+{
+ struct ef100_nic_data *nic_data = efx->nic_data;
+
+ switch (reader->type) {
+ case ESE_EF100_DP_GZ_PAD: /* padding, skip it */
+ return 0;
+ case ESE_EF100_DP_GZ_PARTIAL_TSTAMP_SUB_NANO_BITS:
+ /* Driver doesn't support timestamping yet, so we don't care */
+ return 0;
+ case ESE_EF100_DP_GZ_EVQ_UNSOL_CREDIT_SEQ_BITS:
+ /* Driver doesn't support unsolicited-event credits yet, so
+ * we don't care
+ */
+ return 0;
+ case ESE_EF100_DP_GZ_NMMU_GROUP_SIZE:
+ /* Driver doesn't manage the NMMU (so we don't care) */
+ return 0;
+ case ESE_EF100_DP_GZ_RX_L4_CSUM_PROTOCOLS:
+ /* Driver uses CHECKSUM_COMPLETE, so we don't care about
+ * protocol checksum validation
+ */
+ return 0;
+ case ESE_EF100_DP_GZ_TSO_MAX_HDR_LEN:
+ nic_data->tso_max_hdr_len = min_t(u64, reader->value, 0xffff);
+ return 0;
+ case ESE_EF100_DP_GZ_TSO_MAX_HDR_NUM_SEGS:
+ /* We always put HDR_NUM_SEGS=1 in our TSO descriptors */
+ if (!reader->value) {
+ netif_err(efx, probe, efx->net_dev,
+ "TSO_MAX_HDR_NUM_SEGS < 1\n");
+ return -EOPNOTSUPP;
+ }
+ return 0;
+ case ESE_EF100_DP_GZ_RXQ_SIZE_GRANULARITY:
+ case ESE_EF100_DP_GZ_TXQ_SIZE_GRANULARITY:
+ /* Our TXQ and RXQ sizes are always power-of-two and thus divisible by
+ * EFX_MIN_DMAQ_SIZE, so we just need to check that
+ * EFX_MIN_DMAQ_SIZE is divisible by GRANULARITY.
+ * This is very unlikely to fail.
+ */
+ if (EFX_MIN_DMAQ_SIZE % reader->value) {
+ netif_err(efx, probe, efx->net_dev,
+ "%s size granularity is %llu, can't guarantee safety\n",
+ reader->type == ESE_EF100_DP_GZ_RXQ_SIZE_GRANULARITY ? "RXQ" : "TXQ",
+ reader->value);
+ return -EOPNOTSUPP;
+ }
+ return 0;
+ case ESE_EF100_DP_GZ_TSO_MAX_PAYLOAD_LEN:
+ nic_data->tso_max_payload_len = min_t(u64, reader->value, GSO_MAX_SIZE);
+ efx->net_dev->gso_max_size = nic_data->tso_max_payload_len;
+ return 0;
+ case ESE_EF100_DP_GZ_TSO_MAX_PAYLOAD_NUM_SEGS:
+ nic_data->tso_max_payload_num_segs = min_t(u64, reader->value, 0xffff);
+ efx->net_dev->gso_max_segs = nic_data->tso_max_payload_num_segs;
+ return 0;
+ case ESE_EF100_DP_GZ_TSO_MAX_NUM_FRAMES:
+ nic_data->tso_max_frames = min_t(u64, reader->value, 0xffff);
+ return 0;
+ case ESE_EF100_DP_GZ_COMPAT:
+ if (reader->value) {
+ netif_err(efx, probe, efx->net_dev,
+ "DP_COMPAT has unknown bits %#llx, driver not compatible with this hw\n",
+ reader->value);
+ return -EOPNOTSUPP;
+ }
+ return 0;
+ case ESE_EF100_DP_GZ_MEM2MEM_MAX_LEN:
+ /* Driver doesn't use mem2mem transfers */
+ return 0;
+ case ESE_EF100_DP_GZ_EVQ_TIMER_TICK_NANOS:
+ /* Driver doesn't currently use EVQ_TIMER */
+ return 0;
+ case ESE_EF100_DP_GZ_NMMU_PAGE_SIZES:
+ /* Driver doesn't manage the NMMU (so we don't care) */
+ return 0;
+ case ESE_EF100_DP_GZ_VI_STRIDES:
+ /* We never try to set the VI stride, and we don't rely on
+ * being able to find VIs past VI 0 until after we've learned
+ * the current stride from MC_CMD_GET_CAPABILITIES.
+ * So the value of this shouldn't matter.
+ */
+ if (reader->value != ESE_EF100_DP_GZ_VI_STRIDES_DEFAULT)
+ netif_dbg(efx, probe, efx->net_dev,
+ "NIC has other than default VI_STRIDES (mask "
+ "%#llx), early probing might use wrong one\n",
+ reader->value);
+ return 0;
+ case ESE_EF100_DP_GZ_RX_MAX_RUNT:
+ /* Driver doesn't look at L2_STATUS:LEN_ERR bit, so we don't
+ * care whether it indicates runt or overlength for any given
+ * packet, so we don't care about this parameter.
+ */
+ return 0;
+ default:
+ /* Host interface says "Drivers should ignore design parameters
+ * that they do not recognise."
+ */
+ netif_dbg(efx, probe, efx->net_dev,
+ "Ignoring unrecognised design parameter %u\n",
+ reader->type);
+ return 0;
+ }
+}
+
+static int ef100_check_design_params(struct efx_nic *efx)
+{
+ struct ef100_tlv_state reader = {};
+ u32 total_len, offset = 0;
+ efx_dword_t reg;
+ int rc = 0, i;
+ u32 data;
+
+ efx_readd(efx, &reg, ER_GZ_PARAMS_TLV_LEN);
+ total_len = EFX_DWORD_FIELD(reg, EFX_DWORD_0);
+ netif_dbg(efx, probe, efx->net_dev, "%u bytes of design parameters\n",
+ total_len);
+ while (offset < total_len) {
+ efx_readd(efx, &reg, ER_GZ_PARAMS_TLV + offset);
+ data = EFX_DWORD_FIELD(reg, EFX_DWORD_0);
+ for (i = 0; i < sizeof(data); i++) {
+ rc = ef100_tlv_feed(&reader, data);
+ /* Got a complete value? */
+ if (!rc && reader.state == EF100_TLV_TYPE)
+ rc = ef100_process_design_param(efx, &reader);
+ if (rc)
+ goto out;
+ data >>= 8;
+ offset++;
+ }
+ }
+ /* Check we didn't end halfway through a TLV entry, which could either
+ * mean that the TLV stream is truncated or just that it's corrupted
+ * and our state machine is out of sync.
+ */
+ if (reader.state != EF100_TLV_TYPE) {
+ if (reader.state == EF100_TLV_TYPE_CONT)
+ netif_err(efx, probe, efx->net_dev,
+ "truncated design parameter (incomplete type %u)\n",
+ reader.type);
+ else
+ netif_err(efx, probe, efx->net_dev,
+ "truncated design parameter %u\n",
+ reader.type);
+ rc = -EIO;
+ }
+out:
+ return rc;
+}
+
+/* NIC probe and remove
+ */
+static int ef100_probe_main(struct efx_nic *efx)
+{
+ unsigned int bar_size = resource_size(&efx->pci_dev->resource[efx->mem_bar]);
+ struct net_device *net_dev = efx->net_dev;
+ struct ef100_nic_data *nic_data;
+ char fw_version[32];
+ int i, rc;
+
+ if (WARN_ON(bar_size == 0))
+ return -EIO;
+
+ nic_data = kzalloc(sizeof(*nic_data), GFP_KERNEL);
+ if (!nic_data)
+ return -ENOMEM;
+ efx->nic_data = nic_data;
+ nic_data->efx = efx;
+ net_dev->features |= efx->type->offload_features;
+ net_dev->hw_features |= efx->type->offload_features;
+
+ /* Populate design-parameter defaults */
+ nic_data->tso_max_hdr_len = ESE_EF100_DP_GZ_TSO_MAX_HDR_LEN_DEFAULT;
+ nic_data->tso_max_frames = ESE_EF100_DP_GZ_TSO_MAX_NUM_FRAMES_DEFAULT;
+ nic_data->tso_max_payload_num_segs = ESE_EF100_DP_GZ_TSO_MAX_PAYLOAD_NUM_SEGS_DEFAULT;
+ nic_data->tso_max_payload_len = ESE_EF100_DP_GZ_TSO_MAX_PAYLOAD_LEN_DEFAULT;
+ net_dev->gso_max_segs = ESE_EF100_DP_GZ_TSO_MAX_HDR_NUM_SEGS_DEFAULT;
+ /* Read design parameters */
+ rc = ef100_check_design_params(efx);
+ if (rc) {
+ netif_err(efx, probe, efx->net_dev,
+ "Unsupported design parameters\n");
+ goto fail;
+ }
+
+ /* we assume later that we can copy from this buffer in dwords */
+ BUILD_BUG_ON(MCDI_CTL_SDU_LEN_MAX_V2 % 4);
+
+ /* MCDI buffers must be 256 byte aligned. */
+ rc = efx_nic_alloc_buffer(efx, &nic_data->mcdi_buf, MCDI_BUF_LEN,
+ GFP_KERNEL);
+ if (rc)
+ goto fail;
+
+ /* Get the MC's warm boot count. In case it's rebooting right
+ * now, be prepared to retry.
+ */
+ i = 0;
+ for (;;) {
+ rc = ef100_get_warm_boot_count(efx);
+ if (rc >= 0)
+ break;
+ if (++i == 5)
+ goto fail;
+ ssleep(1);
+ }
+ nic_data->warm_boot_count = rc;
+
+ /* In case we're recovering from a crash (kexec), we want to
+ * cancel any outstanding request by the previous user of this
+ * function. We send a special message using the least
+ * significant bits of the 'high' (doorbell) register.
+ */
+ _efx_writed(efx, cpu_to_le32(1), efx_reg(efx, ER_GZ_MC_DB_HWRD));
+
+ /* Post-IO section. */
+
+ rc = efx_mcdi_init(efx);
+ if (!rc && efx->mcdi->fn_flags &
+ (1 << MC_CMD_DRV_ATTACH_EXT_OUT_FLAG_NO_ACTIVE_PORT)) {
+ netif_info(efx, probe, efx->net_dev,
+ "No network port on this PCI function");
+ rc = -ENODEV;
+ }
+ if (rc)
+ goto fail;
+ /* Reset (most) configuration for this function */
+ rc = efx_mcdi_reset(efx, RESET_TYPE_ALL);
+ if (rc)
+ goto fail;
+
+ rc = efx_get_pf_index(efx, &nic_data->pf_index);
+ if (rc)
+ goto fail;
+
+ rc = efx_ef100_init_datapath_caps(efx);
+ if (rc < 0)
+ goto fail;
+
+ efx->max_vis = EF100_MAX_VIS;
+
+ rc = efx_mcdi_port_get_number(efx);
+ if (rc < 0)
+ goto fail;
+ efx->port_num = rc;
+
+ efx_mcdi_print_fwver(efx, fw_version, sizeof(fw_version));
+ netif_dbg(efx, drv, efx->net_dev, "Firmware version %s\n", fw_version);
+
+ if (compare_versions(fw_version, "1.1.0.1000") < 0) {
+ netif_info(efx, drv, efx->net_dev, "Firmware uses old event descriptors\n");
+ rc = -EINVAL;
+ goto fail;
+ }
+
+ if (efx_has_cap(efx, UNSOL_EV_CREDIT_SUPPORTED)) {
+ netif_info(efx, drv, efx->net_dev, "Firmware uses unsolicited-event credits\n");
+ rc = -EINVAL;
+ goto fail;
+ }
+
+ rc = ef100_phy_probe(efx);
+ if (rc)
+ goto fail;
+
+ rc = efx_init_channels(efx);
+ if (rc)
+ goto fail;
+
+ down_write(&efx->filter_sem);
+ rc = ef100_filter_table_probe(efx);
+ up_write(&efx->filter_sem);
+ if (rc)
+ goto fail;
+
+ netdev_rss_key_fill(efx->rss_context.rx_hash_key,
+ sizeof(efx->rss_context.rx_hash_key));
+
+ /* Don't fail init if RSS setup doesn't work. */
+ efx_mcdi_push_default_indir_table(efx, efx->n_rx_channels);
+
+ rc = ef100_register_netdev(efx);
+ if (rc)
+ goto fail;
+
+ return 0;
+fail:
+ return rc;
+}
+
+int ef100_probe_pf(struct efx_nic *efx)
+{
+ struct net_device *net_dev = efx->net_dev;
+ struct ef100_nic_data *nic_data;
+ int rc = ef100_probe_main(efx);
+
+ if (rc)
+ goto fail;
+
+ nic_data = efx->nic_data;
+ rc = ef100_get_mac_address(efx, net_dev->perm_addr);
+ if (rc)
+ goto fail;
+ /* Assign MAC address */
+ memcpy(net_dev->dev_addr, net_dev->perm_addr, ETH_ALEN);
+ memcpy(nic_data->port_id, net_dev->perm_addr, ETH_ALEN);
+
+ return 0;
+
+fail:
+ return rc;
+}
+
+int ef100_probe_vf(struct efx_nic *efx)
+{
+ return ef100_probe_main(efx);
+}
+
+void ef100_remove(struct efx_nic *efx)
+{
+ struct ef100_nic_data *nic_data = efx->nic_data;
+
+ ef100_unregister_netdev(efx);
+
+ down_write(&efx->filter_sem);
+ efx_mcdi_filter_table_remove(efx);
+ up_write(&efx->filter_sem);
+ efx_fini_channels(efx);
+ kfree(efx->phy_data);
+ efx->phy_data = NULL;
+ efx_mcdi_detach(efx);
+ efx_mcdi_fini(efx);
+ if (nic_data)
+ efx_nic_free_buffer(efx, &nic_data->mcdi_buf);
+ kfree(nic_data);
+ efx->nic_data = NULL;
+}