No TX or RX path, no MCDI, not even an ifup/down handler.
Besides stubs, the bulk of the patch deals with reading the Xilinx
extended PCIe capability, which tells us where to find our BAR.
Signed-off-by: Edward Cree <ec...@solarflare.com>
---
drivers/net/ethernet/sfc/Kconfig | 10 +
drivers/net/ethernet/sfc/Makefile | 8 +
drivers/net/ethernet/sfc/ef100.c | 583 +++++++++++++++++++++++
drivers/net/ethernet/sfc/ef100_ethtool.c | 26 +
drivers/net/ethernet/sfc/ef100_ethtool.h | 12 +
drivers/net/ethernet/sfc/ef100_netdev.c | 135 ++++++
drivers/net/ethernet/sfc/ef100_netdev.h | 17 +
drivers/net/ethernet/sfc/ef100_nic.c | 177 +++++++
drivers/net/ethernet/sfc/ef100_nic.h | 26 +
drivers/net/ethernet/sfc/ef100_rx.c | 24 +
drivers/net/ethernet/sfc/ef100_rx.h | 17 +
drivers/net/ethernet/sfc/ef100_tx.c | 43 ++
drivers/net/ethernet/sfc/ef100_tx.h | 18 +
drivers/net/ethernet/sfc/net_driver.h | 12 +-
14 files changed, 1107 insertions(+), 1 deletion(-)
create mode 100644 drivers/net/ethernet/sfc/ef100.c
create mode 100644 drivers/net/ethernet/sfc/ef100_ethtool.c
create mode 100644 drivers/net/ethernet/sfc/ef100_ethtool.h
create mode 100644 drivers/net/ethernet/sfc/ef100_netdev.c
create mode 100644 drivers/net/ethernet/sfc/ef100_netdev.h
create mode 100644 drivers/net/ethernet/sfc/ef100_nic.c
create mode 100644 drivers/net/ethernet/sfc/ef100_nic.h
create mode 100644 drivers/net/ethernet/sfc/ef100_rx.c
create mode 100644 drivers/net/ethernet/sfc/ef100_rx.h
create mode 100644 drivers/net/ethernet/sfc/ef100_tx.c
create mode 100644 drivers/net/ethernet/sfc/ef100_tx.h
diff --git a/drivers/net/ethernet/sfc/Kconfig b/drivers/net/ethernet/sfc/Kconfig
index 81b0f7d3a025..2d37d1bc008c 100644
--- a/drivers/net/ethernet/sfc/Kconfig
+++ b/drivers/net/ethernet/sfc/Kconfig
@@ -28,6 +28,16 @@ config SFC
To compile this driver as a module, choose M here. The module
will be called sfc.
+config SFC_EF100
+ tristate "Solarflare EF100 (Riverhead) support"
+ depends on PCI
+ default m
+ help
+ This driver supports 10/25/40/100-gigabit Ethernet cards based
+ on the Solarflare EF100 networking IP in Xilinx FPGAs.
+
+ To compile this driver as a module, choose M here. The module
+ will be called sfc_ef100.
config SFC_MTD
bool "Solarflare SFC9000/SFC9100-family MTD support"
depends on SFC && MTD && !(SFC=y && MTD=m)
diff --git a/drivers/net/ethernet/sfc/Makefile
b/drivers/net/ethernet/sfc/Makefile
index 87d093da22ca..90992a1c404d 100644
--- a/drivers/net/ethernet/sfc/Makefile
+++ b/drivers/net/ethernet/sfc/Makefile
@@ -10,4 +10,12 @@ sfc-$(CONFIG_SFC_SRIOV) += sriov.o siena_sriov.o
ef10_sriov.o
obj-$(CONFIG_SFC) += sfc.o
+sfc_ef100-y += mcdi.o ef100.o efx_common.o efx_channels.o \
+ ef100_nic.o nic.o ef100_netdev.o ef100_ethtool.o \
+ ef100_rx.o rx_common.o ef100_tx.o tx_common.o \
+ ethtool_common.o mcdi_port_common.o mcdi_functions.o
\
+ mcdi_filters.o selftest.o ptp.o
+
+obj-$(CONFIG_SFC_EF100) += sfc_ef100.o
+
obj-$(CONFIG_SFC_FALCON) += falcon/
diff --git a/drivers/net/ethernet/sfc/ef100.c b/drivers/net/ethernet/sfc/ef100.c
new file mode 100644
index 000000000000..a2a816f691ee
--- /dev/null
+++ b/drivers/net/ethernet/sfc/ef100.c
@@ -0,0 +1,583 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/****************************************************************************
+ * Driver for Solarflare network controllers and boards
+ * Copyright 2005-2018 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 "net_driver.h"
+#include <linux/module.h>
+#include <linux/aer.h>
+#include "efx_common.h"
+#include "efx_channels.h"
+#include "io.h"
+#include "ef100_nic.h"
+#include "ef100_netdev.h"
+#include "ef100_regs.h"
+
+#define EFX_EF100_PCI_DEFAULT_BAR 2
+
+/* Number of bytes at start of vendor specified extended capability that
indicate
+ * that the capability is vendor specified. i.e. offset from value returned by
+ * pci_find_next_ext_capability() to beginning of vendor specified capability
+ * header.
+ */
+#define PCI_EXT_CAP_HDR_LENGTH 4
+
+/* Expected size of a Xilinx continuation address table entry. */
+#define ESE_GZ_CFGBAR_CONT_CAP_MIN_LENGTH 16
+
+struct ef100_func_ctl_window {
+ bool valid;
+ unsigned int bar;
+ u64 offset;
+};
+
+static int ef100_pci_walk_xilinx_table(struct efx_nic *efx, u64 offset,
+ struct ef100_func_ctl_window *result);
+
+/* Number of bytes to offset when reading bit position x with dword accessors.
*/
+#define ROUND_DOWN_TO_DWORD(x) (((x) & (~31)) >> 3)
+
+#define EXTRACT_BITS(x, lbn, width) \
+ ((x) >> ((lbn) & 31)) & ((1ull << (width)) - 1)
+
+static u32 _ef100_pci_get_bar_bits_with_width(struct efx_nic *efx,
+ int structure_start,
+ int lbn, int width)
+{
+ efx_dword_t dword;
+
+ efx_readd(efx, &dword, structure_start + ROUND_DOWN_TO_DWORD(lbn));
+
+ return EXTRACT_BITS(le32_to_cpu(dword.u32[0]), lbn, width);
+}
+
+#define ef100_pci_get_bar_bits(efx, entry_location, bitdef) \
+ _ef100_pci_get_bar_bits_with_width(efx, entry_location, \
+ bitdef ## _LBN, bitdef ## _WIDTH)
+
+static int ef100_pci_parse_ef100_entry(struct efx_nic *efx, int entry_location,
+ struct ef100_func_ctl_window *result)
+{
+ u32 bar = ef100_pci_get_bar_bits(efx, entry_location,
+ ESF_GZ_CFGBAR_EF100_BAR);
+ u64 offset = ef100_pci_get_bar_bits(efx, entry_location,
+
ESF_GZ_CFGBAR_EF100_FUNC_CTL_WIN_OFF) << ESE_GZ_EF100_FUNC_CTL_WIN_OFF_SHIFT;
+
+ netif_dbg(efx, probe, efx->net_dev,
+ "Found EF100 function control window bar=%d offset=0x%llx\n",
+ bar, offset);
+
+ if (result->valid) {
+ netif_err(efx, probe, efx->net_dev,
+ "Duplicated EF100 table entry.\n");
+ return -EINVAL;
+ }
+
+ if ((bar == ESE_GZ_CFGBAR_EF100_BAR_NUM_EXPANSION_ROM) ||
+ (bar == ESE_GZ_CFGBAR_EF100_BAR_NUM_INVALID)) {
+ netif_err(efx, probe, efx->net_dev,
+ "Bad BAR value of %d in Xilinx capabilities EF100
entry.\n",
+ bar);
+ return -EINVAL;
+ }
+
+ result->bar = bar;
+ result->offset = offset;
+ result->valid = true;
+ return 0;
+}
+
+static bool ef100_pci_does_bar_overflow(struct efx_nic *efx, int bar,
+ u64 next_entry)
+{
+ return next_entry + ESE_GZ_CFGBAR_ENTRY_HEADER_SIZE >
+ pci_resource_len(efx->pci_dev, bar);
+}
+
+/* Parse a Xilinx capabilities table entry describing a continuation to a new
+ * sub-table.
+ */
+static int ef100_pci_parse_continue_entry(struct efx_nic *efx, int
entry_location,
+ struct ef100_func_ctl_window *result)
+{
+ unsigned int previous_bar;
+ efx_oword_t entry;
+ u64 offset;
+ int rc = 0;
+ u32 bar;
+
+ efx_reado(efx, &entry, entry_location);
+
+ bar = EFX_OWORD_FIELD32(entry, ESF_GZ_CFGBAR_CONT_CAP_BAR);
+
+ offset = EFX_OWORD_FIELD64(entry, ESF_GZ_CFGBAR_CONT_CAP_OFFSET) <<
+ ESE_GZ_CONT_CAP_OFFSET_BYTES_SHIFT;
+
+ previous_bar = efx->mem_bar;
+
+ if ((bar == ESE_GZ_VSEC_BAR_NUM_EXPANSION_ROM) ||
+ (bar == ESE_GZ_VSEC_BAR_NUM_INVALID)) {
+ netif_err(efx, probe, efx->net_dev,
+ "Bad BAR value of %d in Xilinx capabilities
sub-table.\n",
+ bar);
+ return -EINVAL;
+ }
+
+ if (bar != previous_bar) {
+ efx_fini_io(efx);
+
+ if (ef100_pci_does_bar_overflow(efx, bar, offset)) {
+ netif_err(efx, probe, efx->net_dev,
+ "Xilinx table will overrun BAR[%d]
offset=0x%llx\n",
+ bar, offset);
+ return -EINVAL;
+ }
+
+ /* Temporarily map new BAR. */
+ rc = efx_init_io(efx, bar,
+ DMA_BIT_MASK(ESF_GZ_TX_SEND_ADDR_WIDTH),
+ pci_resource_len(efx->pci_dev, bar));
+ if (rc) {
+ netif_err(efx, probe, efx->net_dev,
+ "Mapping new BAR for Xilinx table failed,
rc=%d\n", rc);
+ return rc;
+ }
+ }
+
+ rc = ef100_pci_walk_xilinx_table(efx, offset, result);
+ if (rc)
+ return rc;
+
+ if (bar != previous_bar) {
+ efx_fini_io(efx);
+
+ /* Put old BAR back. */
+ rc = efx_init_io(efx, previous_bar,
+ DMA_BIT_MASK(ESF_GZ_TX_SEND_ADDR_WIDTH),
+ pci_resource_len(efx->pci_dev, previous_bar));
+ if (rc) {
+ netif_err(efx, probe, efx->net_dev,
+ "Putting old BAR back failed, rc=%d\n", rc);
+ return rc;
+ }
+ }
+
+ return 0;
+}
+
+/* Iterate over the Xilinx capabilities table in the currently mapped BAR and
+ * call ef100_pci_parse_ef100_entry() on any EF100 entries and
+ * ef100_pci_parse_continue_entry() on any table continuations.
+ */
+static int ef100_pci_walk_xilinx_table(struct efx_nic *efx, u64 offset,
+ struct ef100_func_ctl_window *result)
+{
+ u64 current_entry = offset;
+ int rc = 0;
+
+ while (true) {
+ u32 id = ef100_pci_get_bar_bits(efx, current_entry,
+ ESF_GZ_CFGBAR_ENTRY_FORMAT);
+ u32 last = ef100_pci_get_bar_bits(efx, current_entry,
+ ESF_GZ_CFGBAR_ENTRY_LAST);
+ u32 rev = ef100_pci_get_bar_bits(efx, current_entry,
+ ESF_GZ_CFGBAR_ENTRY_REV);
+ u32 entry_size;
+
+ if (id == ESE_GZ_CFGBAR_ENTRY_LAST)
+ return 0;
+
+ entry_size = ef100_pci_get_bar_bits(efx, current_entry,
+ ESF_GZ_CFGBAR_ENTRY_SIZE);
+
+ netif_dbg(efx, probe, efx->net_dev,
+ "Seen Xilinx table entry 0x%x size 0x%x at 0x%llx in
BAR[%d]\n",
+ id, entry_size, current_entry, efx->mem_bar);
+
+ if (entry_size < sizeof(uint32_t) * 2) {
+ netif_err(efx, probe, efx->net_dev,
+ "Xilinx table entry too short len=0x%x\n",
entry_size);
+ return -EINVAL;
+ }
+
+ switch (id) {
+ case ESE_GZ_CFGBAR_ENTRY_EF100:
+ if ((rev != ESE_GZ_CFGBAR_ENTRY_REV_EF100) ||
+ (entry_size < ESE_GZ_CFGBAR_ENTRY_SIZE_EF100)) {
+ netif_err(efx, probe, efx->net_dev,
+ "Bad length or rev for EF100 entry in
Xilinx capabilities table. entry_size=%d rev=%d.\n",
+ entry_size, rev);
+ return -EINVAL;
+ }
+
+ rc = ef100_pci_parse_ef100_entry(efx, current_entry,
+ result);
+ if (rc)
+ return rc;
+ break;
+ case ESE_GZ_CFGBAR_ENTRY_CONT_CAP_ADDR:
+ if ((rev != 0) || (entry_size <
ESE_GZ_CFGBAR_CONT_CAP_MIN_LENGTH)) {
+ netif_err(efx, probe, efx->net_dev,
+ "Bad length or rev for continue entry
in Xilinx capabilities table. entry_size=%d rev=%d.\n",
+ entry_size, rev);
+ return -EINVAL;
+ }
+
+ rc = ef100_pci_parse_continue_entry(efx, current_entry,
result);
+ if (rc)
+ return rc;
+ break;
+ default:
+ /* Ignore unknown table entries. */
+ break;
+ }
+
+ if (last)
+ return 0;
+
+ current_entry += entry_size;
+
+ if (ef100_pci_does_bar_overflow(efx, efx->mem_bar,
current_entry)) {
+ netif_err(efx, probe, efx->net_dev,
+ "Xilinx table overrun at position=0x%llx.\n",
+ current_entry);
+ return -EINVAL;
+ }
+ }
+}
+
+static int _ef100_pci_get_config_bits_with_width(struct efx_nic *efx,
+ int structure_start, int lbn,
+ int width, u32 *result)
+{
+ int rc, pos = structure_start + ROUND_DOWN_TO_DWORD(lbn);
+ u32 temp;
+
+ rc = pci_read_config_dword(efx->pci_dev, pos, &temp);
+ if (rc) {
+ netif_err(efx, probe, efx->net_dev,
+ "Failed to read PCI config dword at %d\n",
+ pos);
+ return rc;
+ }
+
+ *result = EXTRACT_BITS(temp, lbn, width);
+
+ return 0;
+}
+
+#define ef100_pci_get_config_bits(efx, entry_location, bitdef, result) \
+ _ef100_pci_get_config_bits_with_width(efx, entry_location, \
+ bitdef ## _LBN, bitdef ## _WIDTH, result)
+
+/* Call ef100_pci_walk_xilinx_table() for the Xilinx capabilities table pointed
+ * to by this PCI_EXT_CAP_ID_VNDR.
+ */
+static int ef100_pci_parse_xilinx_cap(struct efx_nic *efx, int vndr_cap,
+ bool has_offset_hi,
+ struct ef100_func_ctl_window *result)
+{
+ u32 offset_high = 0;
+ u32 offset_lo = 0;
+ u64 offset = 0;
+ u32 bar = 0;
+ int rc = 0;
+
+ rc = ef100_pci_get_config_bits(efx, vndr_cap, ESF_GZ_VSEC_TBL_BAR,
&bar);
+ if (rc) {
+ netif_err(efx, probe, efx->net_dev,
+ "Failed to read ESF_GZ_VSEC_TBL_BAR, rc=%d\n",
+ rc);
+ return rc;
+ }
+
+ if ((bar == ESE_GZ_CFGBAR_CONT_CAP_BAR_NUM_EXPANSION_ROM) ||
+ (bar == ESE_GZ_CFGBAR_CONT_CAP_BAR_NUM_INVALID)) {
+ netif_err(efx, probe, efx->net_dev,
+ "Bad BAR value of %d in Xilinx capabilities
sub-table.\n",
+ bar);
+ return -EINVAL;
+ }
+
+ rc = ef100_pci_get_config_bits(efx, vndr_cap, ESF_GZ_VSEC_TBL_OFF_LO,
&offset_lo);
+ if (rc) {
+ netif_err(efx, probe, efx->net_dev,
+ "Failed to read ESF_GZ_VSEC_TBL_OFF_LO, rc=%d\n",
+ rc);
+ return rc;
+ }
+
+ /* Get optional extension to 64bit offset. */
+ if (has_offset_hi) {
+ rc = ef100_pci_get_config_bits(efx, vndr_cap,
ESF_GZ_VSEC_TBL_OFF_HI, &offset_high);
+ if (rc) {
+ netif_err(efx, probe, efx->net_dev,
+ "Failed to read ESF_GZ_VSEC_TBL_OFF_HI,
rc=%d\n",
+ rc);
+ return rc;
+ }
+ }
+
+ offset = (((u64)offset_lo) << ESE_GZ_VSEC_TBL_OFF_LO_BYTES_SHIFT) |
+ (((u64)offset_high) << ESE_GZ_VSEC_TBL_OFF_HI_BYTES_SHIFT);
+
+ if (offset > pci_resource_len(efx->pci_dev, bar) - sizeof(uint32_t) *
2) {
+ netif_err(efx, probe, efx->net_dev,
+ "Xilinx table will overrun BAR[%d] offset=0x%llx\n",
+ bar, offset);
+ return -EINVAL;
+ }
+
+ /* Temporarily map BAR. */
+ rc = efx_init_io(efx, bar,
+ DMA_BIT_MASK(ESF_GZ_TX_SEND_ADDR_WIDTH),
+ pci_resource_len(efx->pci_dev, bar));
+ if (rc) {
+ netif_err(efx, probe, efx->net_dev,
+ "efx_init_io failed, rc=%d\n", rc);
+ return rc;
+ }
+
+ rc = ef100_pci_walk_xilinx_table(efx, offset, result);
+
+ /* Unmap temporarily mapped BAR. */
+ efx_fini_io(efx);
+ return rc;
+}
+
+/* Call ef100_pci_parse_ef100_entry() for each Xilinx PCI_EXT_CAP_ID_VNDR
+ * capability.
+ */
+static int ef100_pci_find_func_ctrl_window(struct efx_nic *efx,
+ struct ef100_func_ctl_window *result)
+{
+ int num_xilinx_caps = 0;
+ int cap = 0;
+
+ result->valid = false;
+
+ while ((cap = pci_find_next_ext_capability(efx->pci_dev, cap,
PCI_EXT_CAP_ID_VNDR)) != 0) {
+ int vndr_cap = cap + PCI_EXT_CAP_HDR_LENGTH;
+ u32 vsec_ver = 0;
+ u32 vsec_len = 0;
+ u32 vsec_id = 0;
+ int rc = 0;
+
+ num_xilinx_caps++;
+
+ rc = ef100_pci_get_config_bits(efx, vndr_cap, ESF_GZ_VSEC_ID,
+ &vsec_id);
+ if (rc) {
+ netif_err(efx, probe, efx->net_dev,
+ "Failed to read ESF_GZ_VSEC_ID, rc=%d\n",
+ rc);
+ return rc;
+ }
+
+ rc = ef100_pci_get_config_bits(efx, vndr_cap, ESF_GZ_VSEC_VER,
+ &vsec_ver);
+ if (rc) {
+ netif_err(efx, probe, efx->net_dev,
+ "Failed to read ESF_GZ_VSEC_VER, rc=%d\n",
+ rc);
+ return rc;
+ }
+
+ /* Get length of whole capability - i.e. starting at cap */
+ rc = ef100_pci_get_config_bits(efx, vndr_cap, ESF_GZ_VSEC_LEN,
+ &vsec_len);
+ if (rc) {
+ netif_err(efx, probe, efx->net_dev,
+ "Failed to read ESF_GZ_VSEC_LEN, rc=%d\n",
+ rc);
+ return rc;
+ }
+
+ if ((vsec_id == ESE_GZ_XILINX_VSEC_ID) &&
+ (vsec_ver == ESE_GZ_VSEC_VER_XIL_CFGBAR) &&
+ (vsec_len >= ESE_GZ_VSEC_LEN_MIN)) {
+ bool has_offset_hi = (vsec_len >=
ESE_GZ_VSEC_LEN_HIGH_OFFT);
+
+ rc = ef100_pci_parse_xilinx_cap(efx, vndr_cap,
+ has_offset_hi, result);
+ if (rc)
+ return rc;
+ }
+ }
+
+ if (num_xilinx_caps && !result->valid) {
+ netif_err(efx, probe, efx->net_dev,
+ "Seen %d Xilinx tables, but no EF100 entry.\n",
+ num_xilinx_caps);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/* Final NIC shutdown
+ * This is called only at module unload (or hotplug removal). A PF can call
+ * this on its VFs to ensure they are unbound first.
+ */
+static void ef100_pci_remove(struct pci_dev *pci_dev)
+{
+ struct efx_nic *efx;
+
+ efx = pci_get_drvdata(pci_dev);
+ if (!efx)
+ return;
+
+ rtnl_lock();
+ dev_close(efx->net_dev);
+ rtnl_unlock();
+
+ /* Unregistering our netdev notifier triggers unbinding of TC indirect
+ * blocks, so we have to do it before PCI removal.
+ */
+ unregister_netdevice_notifier(&efx->netdev_notifier);
+ ef100_remove(efx);
+ efx_fini_io(efx);
+ netif_dbg(efx, drv, efx->net_dev, "shutdown successful\n");
+
+ pci_set_drvdata(pci_dev, NULL);
+ efx_fini_struct(efx);
+ free_netdev(efx->net_dev);
+
+ pci_disable_pcie_error_reporting(pci_dev);
+};
+
+static int ef100_pci_probe(struct pci_dev *pci_dev,
+ const struct pci_device_id *entry)
+{
+ struct ef100_func_ctl_window fcw = { 0 };
+ struct net_device *net_dev;
+ struct efx_nic *efx;
+ int rc;
+
+ /* Allocate and initialise a struct net_device and struct efx_nic */
+ net_dev = alloc_etherdev_mq(sizeof(*efx), EFX_MAX_CORE_TX_QUEUES);
+ if (!net_dev)
+ return -ENOMEM;
+ efx = netdev_priv(net_dev);
+ efx->type = (const struct efx_nic_type *)entry->driver_data;
+
+ pci_set_drvdata(pci_dev, efx);
+ SET_NETDEV_DEV(net_dev, &pci_dev->dev);
+ rc = efx_init_struct(efx, pci_dev, net_dev);
+ if (rc)
+ goto fail;
+
+ efx->vi_stride = EF100_DEFAULT_VI_STRIDE;
+ netif_info(efx, probe, efx->net_dev,
+ "Solarflare EF100 NIC detected\n");
+
+ rc = ef100_pci_find_func_ctrl_window(efx, &fcw);
+ if (rc) {
+ netif_err(efx, probe, efx->net_dev,
+ "Error looking for ef100 function control window,
rc=%d\n",
+ rc);
+ goto fail;
+ }
+
+ if (!fcw.valid) {
+ /* Extended capability not found - use defaults. */
+ fcw.bar = EFX_EF100_PCI_DEFAULT_BAR;
+ fcw.offset = 0;
+ fcw.valid = true;
+ }
+
+ if (fcw.offset > pci_resource_len(efx->pci_dev, fcw.bar) -
ESE_GZ_FCW_LEN) {
+ netif_err(efx, probe, efx->net_dev,
+ "Func control window overruns BAR\n");
+ goto fail;
+ }
+
+ /* Set up basic I/O (BAR mappings etc) */
+ rc = efx_init_io(efx, fcw.bar,
+ DMA_BIT_MASK(ESF_GZ_TX_SEND_ADDR_WIDTH),
+ pci_resource_len(efx->pci_dev, fcw.bar));
+ if (rc)
+ goto fail;
+
+ efx->reg_base = fcw.offset;
+
+ efx->netdev_notifier.notifier_call = ef100_netdev_event;
+ rc = register_netdevice_notifier(&efx->netdev_notifier);
+ if (rc) {
+ netif_err(efx, probe, efx->net_dev,
+ "Failed to register netdevice notifier, rc=%d\n", rc);
+ goto fail;
+ }
+
+ rc = efx->type->probe(efx);
+ if (rc)
+ goto fail;
+
+ netif_dbg(efx, probe, efx->net_dev, "initialisation successful\n");
+
+ return 0;
+
+fail:
+ ef100_pci_remove(pci_dev);
+ return rc;
+}
+
+/* PCI device ID table */
+static const struct pci_device_id ef100_pci_table[] = {
+ {PCI_DEVICE(PCI_VENDOR_ID_XILINX, 0x0100), /* Riverhead PF */
+ .driver_data = (unsigned long) &ef100_pf_nic_type },
+ {0} /* end of list */
+};
+
+static struct pci_driver ef100_pci_driver = {
+ .name = KBUILD_MODNAME,
+ .id_table = ef100_pci_table,
+ .probe = ef100_pci_probe,
+ .remove = ef100_pci_remove,
+ .err_handler = &efx_err_handlers,
+};
+
+static int __init ef100_init_module(void)
+{
+ int rc;
+
+ pr_info("Solarflare EF100 NET driver v" EFX_DRIVER_VERSION "\n");
+
+ rc = efx_create_reset_workqueue();
+ if (rc)
+ goto err_reset;
+
+ rc = pci_register_driver(&ef100_pci_driver);
+ if (rc < 0) {
+ pr_err("pci_register_driver failed, rc=%d\n", rc);
+ goto err_pci;
+ }
+
+ return 0;
+
+err_pci:
+ efx_destroy_reset_workqueue();
+err_reset:
+ return rc;
+}
+
+static void __exit ef100_exit_module(void)
+{
+ pr_info("Solarflare EF100 NET driver unloading\n");
+
+ pci_unregister_driver(&ef100_pci_driver);
+}
+
+module_init(ef100_init_module);
+module_exit(ef100_exit_module);
+
+MODULE_DESCRIPTION("Solarflare EF100 network driver");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(pci, ef100_pci_table);
+MODULE_VERSION(EFX_DRIVER_VERSION);
diff --git a/drivers/net/ethernet/sfc/ef100_ethtool.c
b/drivers/net/ethernet/sfc/ef100_ethtool.c
new file mode 100644
index 000000000000..af3f385b828b
--- /dev/null
+++ b/drivers/net/ethernet/sfc/ef100_ethtool.c
@@ -0,0 +1,26 @@
+// 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 <linux/module.h>
+#include <linux/netdevice.h>
+#include "net_driver.h"
+#include "efx.h"
+#include "mcdi_port_common.h"
+#include "ethtool_common.h"
+#include "ef100_ethtool.h"
+#include "mcdi_functions.h"
+
+const char *efx_driver_name = KBUILD_MODNAME;
+
+/* Ethtool options available
+ */
+const struct ethtool_ops ef100_ethtool_ops = {
+ .get_drvinfo = efx_ethtool_get_drvinfo,
+};
diff --git a/drivers/net/ethernet/sfc/ef100_ethtool.h
b/drivers/net/ethernet/sfc/ef100_ethtool.h
new file mode 100644
index 000000000000..6efda72dfc6c
--- /dev/null
+++ b/drivers/net/ethernet/sfc/ef100_ethtool.h
@@ -0,0 +1,12 @@
+/* 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.
+ */
+
+extern const struct ethtool_ops ef100_ethtool_ops;
diff --git a/drivers/net/ethernet/sfc/ef100_netdev.c
b/drivers/net/ethernet/sfc/ef100_netdev.c
new file mode 100644
index 000000000000..356938104cb2
--- /dev/null
+++ b/drivers/net/ethernet/sfc/ef100_netdev.c
@@ -0,0 +1,135 @@
+// 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 "net_driver.h"
+#include "mcdi_port_common.h"
+#include "mcdi_functions.h"
+#include "efx_common.h"
+#include "efx_channels.h"
+#include "tx_common.h"
+#include "ef100_netdev.h"
+#include "ef100_ethtool.h"
+#include "efx_common.h"
+#include "nic_common.h"
+#include "ef100_nic.h"
+#include "ef100_tx.h"
+#include "ef100_regs.h"
+#include "mcdi_filters.h"
+#include "rx_common.h"
+
+/* In EF10 this was a module parameter. Since EF100 is a new module, we
+ * don't have to be compatible with the old module parameters, so we can
+ * get rid of it.
+ */
+bool efx_separate_tx_channels = false;
+
+static void ef100_update_name(struct efx_nic *efx)
+{
+ strcpy(efx->name, efx->net_dev->name);
+}
+
+/* Initiate a packet transmission. We use one channel per CPU
+ * (sharing when we have more CPUs than channels).
+ *
+ * Context: non-blocking.
+ * Note that returning anything other than NETDEV_TX_OK will cause the
+ * OS to free the skb.
+ */
+netdev_tx_t ef100_hard_start_xmit(struct sk_buff *skb,
+ struct net_device *net_dev)
+{
+ struct efx_nic *efx = netdev_priv(net_dev);
+ struct efx_tx_queue *tx_queue;
+ struct efx_channel *channel;
+ int rc;
+
+ channel = efx_get_tx_channel(efx, skb_get_queue_mapping(skb));
+ netif_vdbg(efx, tx_queued, efx->net_dev,
+ "%s len %d data %d channel %d\n", __func__,
+ skb->len, skb->data_len, channel->channel);
+ if (!efx->n_channels || !efx->n_tx_channels || !channel) {
+ netif_stop_queue(net_dev);
+ goto err;
+ }
+
+ tx_queue = &channel->tx_queue[0];
+ rc = efx_enqueue_skb(tx_queue, skb);
+ if (rc == 0)
+ return NETDEV_TX_OK;
+
+err:
+ net_dev->stats.tx_dropped++;
+ return NETDEV_TX_OK;
+}
+
+static const struct net_device_ops ef100_netdev_ops = {
+ .ndo_start_xmit = ef100_hard_start_xmit,
+};
+
+/* Netdev registration
+ */
+int ef100_netdev_event(struct notifier_block *this,
+ unsigned long event, void *ptr)
+{
+ struct efx_nic *efx = container_of(this, struct efx_nic,
netdev_notifier);
+ struct net_device *net_dev = netdev_notifier_info_to_dev(ptr);
+
+ if (netdev_priv(net_dev) == efx && event == NETDEV_CHANGENAME)
+ ef100_update_name(efx);
+
+ return NOTIFY_DONE;
+}
+
+int ef100_register_netdev(struct efx_nic *efx)
+{
+ struct net_device *net_dev = efx->net_dev;
+ int rc;
+
+ net_dev->watchdog_timeo = 5 * HZ;
+ net_dev->irq = efx->pci_dev->irq;
+ net_dev->netdev_ops = &ef100_netdev_ops;
+ net_dev->min_mtu = EFX_MIN_MTU;
+ net_dev->max_mtu = EFX_MAX_MTU;
+ net_dev->ethtool_ops = &ef100_ethtool_ops;
+
+ rtnl_lock();
+
+ rc = dev_alloc_name(net_dev, net_dev->name);
+ if (rc < 0)
+ goto fail_locked;
+ ef100_update_name(efx);
+
+ rc = register_netdevice(net_dev);
+ if (rc)
+ goto fail_locked;
+
+ /* Always start with carrier off; PHY events will detect the link */
+ netif_carrier_off(net_dev);
+
+ efx->state = STATE_READY;
+ rtnl_unlock();
+ efx_init_mcdi_logging(efx);
+
+ return 0;
+
+fail_locked:
+ rtnl_unlock();
+ netif_err(efx, drv, efx->net_dev, "could not register net dev\n");
+ return rc;
+}
+
+void ef100_unregister_netdev(struct efx_nic *efx)
+{
+ if (efx_dev_registered(efx)) {
+ efx_fini_mcdi_logging(efx);
+ efx->state = STATE_UNINIT;
+ unregister_netdev(efx->net_dev);
+ }
+}
diff --git a/drivers/net/ethernet/sfc/ef100_netdev.h
b/drivers/net/ethernet/sfc/ef100_netdev.h
new file mode 100644
index 000000000000..d40abb7cc086
--- /dev/null
+++ b/drivers/net/ethernet/sfc/ef100_netdev.h
@@ -0,0 +1,17 @@
+/* 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 <linux/netdevice.h>
+
+int ef100_netdev_event(struct notifier_block *this,
+ unsigned long event, void *ptr);
+int ef100_register_netdev(struct efx_nic *efx);
+void ef100_unregister_netdev(struct efx_nic *efx);
diff --git a/drivers/net/ethernet/sfc/ef100_nic.c
b/drivers/net/ethernet/sfc/ef100_nic.c
new file mode 100644
index 000000000000..20b6f4bb35ad
--- /dev/null
+++ b/drivers/net/ethernet/sfc/ef100_nic.c
@@ -0,0 +1,177 @@
+// 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
+
+/* MCDI
+ */
+static int ef100_get_warm_boot_count(struct efx_nic *efx)
+{
+ efx_dword_t reg;
+
+ efx_readd(efx, ®, 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;
+ }
+}
+
+/* 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);
+}
+
+/* efx_mcdi_process_event() may call this */
+void efx_mcdi_sensor_event(struct efx_nic *efx, efx_qword_t *ev) {}
+
+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;
+}
+
+/* NIC level access functions
+ */
+const struct efx_nic_type ef100_pf_nic_type = {
+ .revision = EFX_REV_EF100,
+ .is_vf = false,
+ .probe = ef100_probe_pf,
+ .mcdi_max_ver = 2,
+ .irq_enable_master = efx_port_dummy_op_void,
+ .irq_disable_non_ev = efx_port_dummy_op_void,
+ .push_irq_moderation = efx_channel_dummy_op_void,
+ .min_interrupt_mode = EFX_INT_MODE_MSIX,
+
+ .ev_probe = ef100_ev_probe,
+ .irq_handle_msi = ef100_msi_interrupt,
+
+ /* Per-type bar/size configuration not used on ef100. Location of
+ * registers is defined by extended capabilities.
+ */
+ .mem_bar = NULL,
+ .mem_map_size = NULL,
+
+};
+
+/* 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;
+ 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;
+
+ /* 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. */
+
+ efx->max_vis = EF100_MAX_VIS;
+
+ rc = efx_init_channels(efx);
+ if (rc)
+ goto fail;
+
+ rc = ef100_register_netdev(efx);
+ if (rc)
+ goto fail;
+
+ return 0;
+fail:
+ return rc;
+}
+
+int ef100_probe_pf(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);
+ efx_fini_channels(efx);
+ kfree(efx->phy_data);
+ efx->phy_data = NULL;
+ kfree(nic_data);
+ efx->nic_data = NULL;
+}
diff --git a/drivers/net/ethernet/sfc/ef100_nic.h
b/drivers/net/ethernet/sfc/ef100_nic.h
new file mode 100644
index 000000000000..643111aebba5
--- /dev/null
+++ b/drivers/net/ethernet/sfc/ef100_nic.h
@@ -0,0 +1,26 @@
+/* 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 "net_driver.h"
+#include "nic_common.h"
+
+extern const struct efx_nic_type ef100_pf_nic_type;
+
+int ef100_probe_pf(struct efx_nic *efx);
+void ef100_remove(struct efx_nic *efx);
+
+struct ef100_nic_data {
+ struct efx_nic *efx;
+ u16 warm_boot_count;
+};
+
+#define efx_ef100_has_cap(caps, flag) \
+ (!!((caps) & BIT_ULL(MC_CMD_GET_CAPABILITIES_V4_OUT_ ## flag ## _LBN)))
diff --git a/drivers/net/ethernet/sfc/ef100_rx.c
b/drivers/net/ethernet/sfc/ef100_rx.c
new file mode 100644
index 000000000000..f06aa302e9c9
--- /dev/null
+++ b/drivers/net/ethernet/sfc/ef100_rx.c
@@ -0,0 +1,24 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/****************************************************************************
+ * Driver for Solarflare network controllers and boards
+ * Copyright 2005-2019 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 "net_driver.h"
+#include "ef100_rx.h"
+#include "rx_common.h"
+
+void __efx_rx_packet(struct efx_channel *channel)
+{
+ /* Stub. No RX path yet. Discard the buffer. */
+ struct efx_rx_buffer *rx_buf = efx_rx_buffer(&channel->rx_queue,
+ channel->rx_pkt_index);
+ struct efx_rx_queue *rx_queue = efx_channel_get_rx_queue(channel);
+
+ efx_free_rx_buffers(rx_queue, rx_buf, 1);
+ channel->rx_pkt_n_frags = 0;
+}
diff --git a/drivers/net/ethernet/sfc/ef100_rx.h
b/drivers/net/ethernet/sfc/ef100_rx.h
new file mode 100644
index 000000000000..9de9c2ab9014
--- /dev/null
+++ b/drivers/net/ethernet/sfc/ef100_rx.h
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/****************************************************************************
+ * Driver for Solarflare network controllers and boards
+ * Copyright 2019 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.
+ */
+
+#ifndef EFX_EF100_RX_H
+#define EFX_EF100_RX_H
+
+#include "net_driver.h"
+
+#endif
diff --git a/drivers/net/ethernet/sfc/ef100_tx.c
b/drivers/net/ethernet/sfc/ef100_tx.c
new file mode 100644
index 000000000000..0272f99b3115
--- /dev/null
+++ b/drivers/net/ethernet/sfc/ef100_tx.c
@@ -0,0 +1,43 @@
+// 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 "net_driver.h"
+#include "tx_common.h"
+#include "ef100_tx.h"
+
+int efx_enqueue_skb_tso(struct efx_tx_queue *tx_queue, struct sk_buff *skb,
+ bool *data_mapped)
+{
+ /* This should never be called; it's just a stub callback for some
+ * infrastructure that's shared with the EF10 driver
+ * (tx_queue->handle_tso, only called from tx.c which isn't linked
+ * into sfc_ef100.ko).
+ */
+ WARN_ON_ONCE(1);
+ return -EOPNOTSUPP;
+}
+
+/* Add a socket buffer to a TX queue
+ *
+ * You must hold netif_tx_lock() to call this function.
+ *
+ * Returns 0 on success, error code otherwise. In case of an error this
+ * function will free the SKB.
+ */
+int efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb)
+{
+ /* Stub. No TX path yet. */
+ struct efx_nic *efx = tx_queue->efx;
+
+ netif_stop_queue(efx->net_dev);
+ dev_kfree_skb_any(skb);
+ return -ENODEV;
+}
diff --git a/drivers/net/ethernet/sfc/ef100_tx.h
b/drivers/net/ethernet/sfc/ef100_tx.h
new file mode 100644
index 000000000000..dedfed5d3e53
--- /dev/null
+++ b/drivers/net/ethernet/sfc/ef100_tx.h
@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/****************************************************************************
+ * Driver for Solarflare network controllers and boards
+ * Copyright 2019 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.
+ */
+
+#ifndef EFX_EF100_TX_H
+#define EFX_EF100_TX_H
+
+#include "net_driver.h"
+
+int efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb);
+#endif
diff --git a/drivers/net/ethernet/sfc/net_driver.h
b/drivers/net/ethernet/sfc/net_driver.h
index 5b3b3a976114..bf78c2faf999 100644
--- a/drivers/net/ethernet/sfc/net_driver.h
+++ b/drivers/net/ethernet/sfc/net_driver.h
@@ -38,7 +38,7 @@
*
**************************************************************************/
-#define EFX_DRIVER_VERSION "4.1"
+#define EFX_DRIVER_VERSION "4.2"
#ifdef DEBUG
#define EFX_WARN_ON_ONCE_PARANOID(x) WARN_ON_ONCE(x)
@@ -965,6 +965,7 @@ struct efx_async_filter_insertion {
* @vpd_sn: Serial number read from VPD
* @xdp_rxq_info_failed: Have any of the rx queues failed to initialise their
* xdp_rxq_info structures?
+ * @netdev_notifier: Netdevice notifier.
* @mem_bar: The BAR that is mapped into membase.
* @reg_base: Offset from the start of the bar to the function control window.
* @monitor_work: Hardware monitor workitem
@@ -1144,6 +1145,8 @@ struct efx_nic {
char *vpd_sn;
bool xdp_rxq_info_failed;
+ struct notifier_block netdev_notifier;
+
unsigned int mem_bar;
u32 reg_base;
@@ -1532,6 +1535,13 @@ efx_get_channel(struct efx_nic *efx, unsigned index)
_channel = _channel->channel ? \
(_efx)->channel[_channel->channel - 1] : NULL)
+static inline struct efx_channel *
+efx_get_tx_channel(struct efx_nic *efx, unsigned int index)
+{
+ EFX_WARN_ON_ONCE_PARANOID(index >= efx->n_tx_channels);
+ return efx->channel[efx->tx_channel_offset + index];
+}
+
static inline struct efx_tx_queue *
efx_get_tx_queue(struct efx_nic *efx, unsigned index, unsigned type)
{
