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-rw-r--r--drivers/net/ethernet/sfc/Kconfig8
-rw-r--r--drivers/net/ethernet/sfc/Makefile1
-rw-r--r--drivers/net/ethernet/sfc/efx.c70
-rw-r--r--drivers/net/ethernet/sfc/ethtool.c3
-rw-r--r--drivers/net/ethernet/sfc/mcdi.c34
-rw-r--r--drivers/net/ethernet/sfc/mcdi.h2
-rw-r--r--drivers/net/ethernet/sfc/mcdi_mac.c2
-rw-r--r--drivers/net/ethernet/sfc/net_driver.h32
-rw-r--r--drivers/net/ethernet/sfc/nic.c79
-rw-r--r--drivers/net/ethernet/sfc/nic.h89
-rw-r--r--drivers/net/ethernet/sfc/siena.c2
-rw-r--r--drivers/net/ethernet/sfc/siena_sriov.c1642
-rw-r--r--drivers/net/ethernet/sfc/vfdi.h254
13 files changed, 2192 insertions, 26 deletions
diff --git a/drivers/net/ethernet/sfc/Kconfig b/drivers/net/ethernet/sfc/Kconfig
index 8d423544a7e6..fb3cbc27063c 100644
--- a/drivers/net/ethernet/sfc/Kconfig
+++ b/drivers/net/ethernet/sfc/Kconfig
@@ -26,3 +26,11 @@ config SFC_MCDI_MON
----help---
This exposes the on-board firmware-managed sensors as a
hardware monitor device.
+config SFC_SRIOV
+ bool "Solarflare SFC9000-family SR-IOV support"
+ depends on SFC && PCI_IOV
+ default y
+ ---help---
+ This enables support for the SFC9000 I/O Virtualization
+ features, allowing accelerated network performance in
+ virtualized environments.
diff --git a/drivers/net/ethernet/sfc/Makefile b/drivers/net/ethernet/sfc/Makefile
index 3fa2e25ccc45..ea1f8db57318 100644
--- a/drivers/net/ethernet/sfc/Makefile
+++ b/drivers/net/ethernet/sfc/Makefile
@@ -4,5 +4,6 @@ sfc-y += efx.o nic.o falcon.o siena.o tx.o rx.o filter.o \
tenxpress.o txc43128_phy.o falcon_boards.o \
mcdi.o mcdi_phy.o mcdi_mon.o
sfc-$(CONFIG_SFC_MTD) += mtd.o
+sfc-$(CONFIG_SFC_SRIOV) += siena_sriov.o
obj-$(CONFIG_SFC) += sfc.o
diff --git a/drivers/net/ethernet/sfc/efx.c b/drivers/net/ethernet/sfc/efx.c
index c9c306aef2d9..ac571cf14485 100644
--- a/drivers/net/ethernet/sfc/efx.c
+++ b/drivers/net/ethernet/sfc/efx.c
@@ -1175,25 +1175,40 @@ static unsigned int efx_wanted_parallelism(struct efx_nic *efx)
unsigned int count;
int cpu;
- if (rss_cpus)
- return rss_cpus;
+ if (rss_cpus) {
+ count = rss_cpus;
+ } else {
+ if (unlikely(!zalloc_cpumask_var(&thread_mask, GFP_KERNEL))) {
+ netif_warn(efx, probe, efx->net_dev,
+ "RSS disabled due to allocation failure\n");
+ return 1;
+ }
- if (unlikely(!zalloc_cpumask_var(&thread_mask, GFP_KERNEL))) {
- netif_warn(efx, probe, efx->net_dev,
- "RSS disabled due to allocation failure\n");
- return 1;
+ count = 0;
+ for_each_online_cpu(cpu) {
+ if (!cpumask_test_cpu(cpu, thread_mask)) {
+ ++count;
+ cpumask_or(thread_mask, thread_mask,
+ topology_thread_cpumask(cpu));
+ }
+ }
+
+ free_cpumask_var(thread_mask);
}
- count = 0;
- for_each_online_cpu(cpu) {
- if (!cpumask_test_cpu(cpu, thread_mask)) {
- ++count;
- cpumask_or(thread_mask, thread_mask,
- topology_thread_cpumask(cpu));
- }
+ /* If RSS is requested for the PF *and* VFs then we can't write RSS
+ * table entries that are inaccessible to VFs
+ */
+ if (efx_sriov_wanted(efx) && efx_vf_size(efx) > 1 &&
+ count > efx_vf_size(efx)) {
+ netif_warn(efx, probe, efx->net_dev,
+ "Reducing number of RSS channels from %u to %u for "
+ "VF support. Increase vf-msix-limit to use more "
+ "channels on the PF.\n",
+ count, efx_vf_size(efx));
+ count = efx_vf_size(efx);
}
- free_cpumask_var(thread_mask);
return count;
}
@@ -1327,6 +1342,10 @@ static int efx_probe_interrupts(struct efx_nic *efx)
}
}
+ /* RSS might be usable on VFs even if it is disabled on the PF */
+ efx->rss_spread = (efx->n_rx_channels > 1 ?
+ efx->n_rx_channels : efx_vf_size(efx));
+
return 0;
}
@@ -1426,7 +1445,7 @@ static int efx_probe_nic(struct efx_nic *efx)
get_random_bytes(&efx->rx_hash_key, sizeof(efx->rx_hash_key));
for (i = 0; i < ARRAY_SIZE(efx->rx_indir_table); i++)
efx->rx_indir_table[i] =
- ethtool_rxfh_indir_default(i, efx->n_rx_channels);
+ ethtool_rxfh_indir_default(i, efx->rss_spread);
efx_set_channels(efx);
netif_set_real_num_tx_queues(efx->net_dev, efx->n_tx_channels);
@@ -1915,6 +1934,7 @@ static int efx_set_mac_address(struct net_device *net_dev, void *data)
}
memcpy(net_dev->dev_addr, new_addr, net_dev->addr_len);
+ efx_sriov_mac_address_changed(efx);
/* Reconfigure the MAC */
mutex_lock(&efx->mac_lock);
@@ -1981,6 +2001,12 @@ static const struct net_device_ops efx_netdev_ops = {
.ndo_set_mac_address = efx_set_mac_address,
.ndo_set_rx_mode = efx_set_rx_mode,
.ndo_set_features = efx_set_features,
+#ifdef CONFIG_SFC_SRIOV
+ .ndo_set_vf_mac = efx_sriov_set_vf_mac,
+ .ndo_set_vf_vlan = efx_sriov_set_vf_vlan,
+ .ndo_set_vf_spoofchk = efx_sriov_set_vf_spoofchk,
+ .ndo_get_vf_config = efx_sriov_get_vf_config,
+#endif
#ifdef CONFIG_NET_POLL_CONTROLLER
.ndo_poll_controller = efx_netpoll,
#endif
@@ -2150,6 +2176,7 @@ int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok)
efx_start_interrupts(efx, false);
efx_restore_filters(efx);
+ efx_sriov_reset(efx);
mutex_unlock(&efx->mac_lock);
@@ -2440,6 +2467,7 @@ static void efx_pci_remove(struct pci_dev *pci_dev)
rtnl_unlock();
efx_stop_interrupts(efx, false);
+ efx_sriov_fini(efx);
efx_unregister_netdev(efx);
efx_mtd_remove(efx);
@@ -2581,6 +2609,11 @@ static int __devinit efx_pci_probe(struct pci_dev *pci_dev,
if (rc)
goto fail4;
+ rc = efx_sriov_init(efx);
+ if (rc)
+ netif_err(efx, probe, efx->net_dev,
+ "SR-IOV can't be enabled rc %d\n", rc);
+
netif_dbg(efx, probe, efx->net_dev, "initialisation successful\n");
/* Try to create MTDs, but allow this to fail */
@@ -2732,6 +2765,10 @@ static int __init efx_init_module(void)
if (rc)
goto err_notifier;
+ rc = efx_init_sriov();
+ if (rc)
+ goto err_sriov;
+
reset_workqueue = create_singlethread_workqueue("sfc_reset");
if (!reset_workqueue) {
rc = -ENOMEM;
@@ -2747,6 +2784,8 @@ static int __init efx_init_module(void)
err_pci:
destroy_workqueue(reset_workqueue);
err_reset:
+ efx_fini_sriov();
+ err_sriov:
unregister_netdevice_notifier(&efx_netdev_notifier);
err_notifier:
return rc;
@@ -2758,6 +2797,7 @@ static void __exit efx_exit_module(void)
pci_unregister_driver(&efx_pci_driver);
destroy_workqueue(reset_workqueue);
+ efx_fini_sriov();
unregister_netdevice_notifier(&efx_netdev_notifier);
}
diff --git a/drivers/net/ethernet/sfc/ethtool.c b/drivers/net/ethernet/sfc/ethtool.c
index 83191151b650..f22f45f515a8 100644
--- a/drivers/net/ethernet/sfc/ethtool.c
+++ b/drivers/net/ethernet/sfc/ethtool.c
@@ -1085,7 +1085,8 @@ static u32 efx_ethtool_get_rxfh_indir_size(struct net_device *net_dev)
{
struct efx_nic *efx = netdev_priv(net_dev);
- return (efx_nic_rev(efx) < EFX_REV_FALCON_B0 ?
+ return ((efx_nic_rev(efx) < EFX_REV_FALCON_B0 ||
+ efx->n_rx_channels == 1) ?
0 : ARRAY_SIZE(efx->rx_indir_table));
}
diff --git a/drivers/net/ethernet/sfc/mcdi.c b/drivers/net/ethernet/sfc/mcdi.c
index 619f63a66ce7..17b6463e459c 100644
--- a/drivers/net/ethernet/sfc/mcdi.c
+++ b/drivers/net/ethernet/sfc/mcdi.c
@@ -560,6 +560,9 @@ void efx_mcdi_process_event(struct efx_channel *channel,
case MCDI_EVENT_CODE_MAC_STATS_DMA:
/* MAC stats are gather lazily. We can ignore this. */
break;
+ case MCDI_EVENT_CODE_FLR:
+ efx_sriov_flr(efx, MCDI_EVENT_FIELD(*event, FLR_VF));
+ break;
default:
netif_err(efx, hw, efx->net_dev, "Unknown MCDI event 0x%x\n",
@@ -1154,6 +1157,37 @@ fail:
return rc;
}
+int efx_mcdi_flush_rxqs(struct efx_nic *efx)
+{
+ struct efx_channel *channel;
+ struct efx_rx_queue *rx_queue;
+ __le32 *qid;
+ int rc, count;
+
+ qid = kmalloc(EFX_MAX_CHANNELS * sizeof(*qid), GFP_KERNEL);
+ if (qid == NULL)
+ return -ENOMEM;
+
+ count = 0;
+ efx_for_each_channel(channel, efx) {
+ efx_for_each_channel_rx_queue(rx_queue, channel) {
+ if (rx_queue->flush_pending) {
+ rx_queue->flush_pending = false;
+ atomic_dec(&efx->rxq_flush_pending);
+ qid[count++] = cpu_to_le32(
+ efx_rx_queue_index(rx_queue));
+ }
+ }
+ }
+
+ rc = efx_mcdi_rpc(efx, MC_CMD_FLUSH_RX_QUEUES, (u8 *)qid,
+ count * sizeof(*qid), NULL, 0, NULL);
+ WARN_ON(rc > 0);
+
+ kfree(qid);
+
+ return rc;
+}
int efx_mcdi_wol_filter_reset(struct efx_nic *efx)
{
diff --git a/drivers/net/ethernet/sfc/mcdi.h b/drivers/net/ethernet/sfc/mcdi.h
index fbaa6efcd744..0bdf3e331832 100644
--- a/drivers/net/ethernet/sfc/mcdi.h
+++ b/drivers/net/ethernet/sfc/mcdi.h
@@ -146,6 +146,8 @@ extern int efx_mcdi_wol_filter_set_magic(struct efx_nic *efx,
extern int efx_mcdi_wol_filter_get_magic(struct efx_nic *efx, int *id_out);
extern int efx_mcdi_wol_filter_remove(struct efx_nic *efx, int id);
extern int efx_mcdi_wol_filter_reset(struct efx_nic *efx);
+extern int efx_mcdi_flush_rxqs(struct efx_nic *efx);
+extern int efx_mcdi_set_mac(struct efx_nic *efx);
extern int efx_mcdi_mac_stats(struct efx_nic *efx, dma_addr_t dma_addr,
u32 dma_len, int enable, int clear);
extern int efx_mcdi_mac_reconfigure(struct efx_nic *efx);
diff --git a/drivers/net/ethernet/sfc/mcdi_mac.c b/drivers/net/ethernet/sfc/mcdi_mac.c
index 98afe1c1165d..1003f309cba7 100644
--- a/drivers/net/ethernet/sfc/mcdi_mac.c
+++ b/drivers/net/ethernet/sfc/mcdi_mac.c
@@ -12,7 +12,7 @@
#include "mcdi.h"
#include "mcdi_pcol.h"
-static int efx_mcdi_set_mac(struct efx_nic *efx)
+int efx_mcdi_set_mac(struct efx_nic *efx)
{
u32 reject, fcntl;
u8 cmdbytes[MC_CMD_SET_MAC_IN_LEN];
diff --git a/drivers/net/ethernet/sfc/net_driver.h b/drivers/net/ethernet/sfc/net_driver.h
index 7870cefcb203..3fbec458c323 100644
--- a/drivers/net/ethernet/sfc/net_driver.h
+++ b/drivers/net/ethernet/sfc/net_driver.h
@@ -24,6 +24,7 @@
#include <linux/device.h>
#include <linux/highmem.h>
#include <linux/workqueue.h>
+#include <linux/mutex.h>
#include <linux/vmalloc.h>
#include <linux/i2c.h>
@@ -54,7 +55,8 @@
#define EFX_MAX_CHANNELS 32U
#define EFX_MAX_RX_QUEUES EFX_MAX_CHANNELS
-#define EFX_MAX_EXTRA_CHANNELS 0U
+#define EFX_EXTRA_CHANNEL_IOV 0
+#define EFX_MAX_EXTRA_CHANNELS 1U
/* Checksum generation is a per-queue option in hardware, so each
* queue visible to the networking core is backed by two hardware TX
@@ -629,6 +631,8 @@ union efx_multicast_hash {
};
struct efx_filter_state;
+struct efx_vf;
+struct vfdi_status;
/**
* struct efx_nic - an Efx NIC
@@ -712,6 +716,17 @@ struct efx_filter_state;
* completed (either success or failure). Not used when MCDI is used to
* flush receive queues.
* @flush_wq: wait queue used by efx_nic_flush_queues() to wait for flush completions.
+ * @vf: Array of &struct efx_vf objects.
+ * @vf_count: Number of VFs intended to be enabled.
+ * @vf_init_count: Number of VFs that have been fully initialised.
+ * @vi_scale: log2 number of vnics per VF.
+ * @vf_buftbl_base: The zeroth buffer table index used to back VF queues.
+ * @vfdi_status: Common VFDI status page to be dmad to VF address space.
+ * @local_addr_list: List of local addresses. Protected by %local_lock.
+ * @local_page_list: List of DMA addressable pages used to broadcast
+ * %local_addr_list. Protected by %local_lock.
+ * @local_lock: Mutex protecting %local_addr_list and %local_page_list.
+ * @peer_work: Work item to broadcast peer addresses to VMs.
* @monitor_work: Hardware monitor workitem
* @biu_lock: BIU (bus interface unit) lock
* @last_irq_cpu: Last CPU to handle a possible test interrupt. This
@@ -762,6 +777,7 @@ struct efx_nic {
unsigned next_buffer_table;
unsigned n_channels;
unsigned n_rx_channels;
+ unsigned rss_spread;
unsigned tx_channel_offset;
unsigned n_tx_channels;
unsigned int rx_buffer_len;
@@ -820,6 +836,20 @@ struct efx_nic {
atomic_t rxq_flush_outstanding;
wait_queue_head_t flush_wq;
+#ifdef CONFIG_SFC_SRIOV
+ struct efx_channel *vfdi_channel;
+ struct efx_vf *vf;
+ unsigned vf_count;
+ unsigned vf_init_count;
+ unsigned vi_scale;
+ unsigned vf_buftbl_base;
+ struct efx_buffer vfdi_status;
+ struct list_head local_addr_list;
+ struct list_head local_page_list;
+ struct mutex local_lock;
+ struct work_struct peer_work;
+#endif
+
/* The following fields may be written more often */
struct delayed_work monitor_work ____cacheline_aligned_in_smp;
diff --git a/drivers/net/ethernet/sfc/nic.c b/drivers/net/ethernet/sfc/nic.c
index 747cf9439164..2bf4283f05fe 100644
--- a/drivers/net/ethernet/sfc/nic.c
+++ b/drivers/net/ethernet/sfc/nic.c
@@ -264,6 +264,10 @@ static int efx_alloc_special_buffer(struct efx_nic *efx,
/* Select new buffer ID */
buffer->index = efx->next_buffer_table;
efx->next_buffer_table += buffer->entries;
+#ifdef CONFIG_SFC_SRIOV
+ BUG_ON(efx_sriov_enabled(efx) &&
+ efx->vf_buftbl_base < efx->next_buffer_table);
+#endif
netif_dbg(efx, probe, efx->net_dev,
"allocating special buffers %d-%d at %llx+%x "
@@ -693,6 +697,16 @@ int efx_nic_flush_queues(struct efx_nic *efx)
}
while (timeout && atomic_read(&efx->drain_pending) > 0) {
+ /* If SRIOV is enabled, then offload receive queue flushing to
+ * the firmware (though we will still have to poll for
+ * completion). If that fails, fall back to the old scheme.
+ */
+ if (efx_sriov_enabled(efx)) {
+ rc = efx_mcdi_flush_rxqs(efx);
+ if (!rc)
+ goto wait;
+ }
+
/* The hardware supports four concurrent rx flushes, each of
* which may need to be retried if there is an outstanding
* descriptor fetch
@@ -712,6 +726,7 @@ int efx_nic_flush_queues(struct efx_nic *efx)
}
}
+ wait:
timeout = wait_event_timeout(efx->flush_wq, efx_flush_wake(efx),
timeout);
}
@@ -1102,11 +1117,13 @@ efx_handle_driver_event(struct efx_channel *channel, efx_qword_t *event)
netif_vdbg(efx, hw, efx->net_dev, "channel %d TXQ %d flushed\n",
channel->channel, ev_sub_data);
efx_handle_tx_flush_done(efx, event);
+ efx_sriov_tx_flush_done(efx, event);
break;
case FSE_AZ_RX_DESCQ_FLS_DONE_EV:
netif_vdbg(efx, hw, efx->net_dev, "channel %d RXQ %d flushed\n",
channel->channel, ev_sub_data);
efx_handle_rx_flush_done(efx, event);
+ efx_sriov_rx_flush_done(efx, event);
break;
case FSE_AZ_EVQ_INIT_DONE_EV:
netif_dbg(efx, hw, efx->net_dev,
@@ -1138,16 +1155,24 @@ efx_handle_driver_event(struct efx_channel *channel, efx_qword_t *event)
RESET_TYPE_DISABLE);
break;
case FSE_BZ_RX_DSC_ERROR_EV:
- netif_err(efx, rx_err, efx->net_dev,
- "RX DMA Q %d reports descriptor fetch error."
- " RX Q %d is disabled.\n", ev_sub_data, ev_sub_data);
- efx_schedule_reset(efx, RESET_TYPE_RX_DESC_FETCH);
+ if (ev_sub_data < EFX_VI_BASE) {
+ netif_err(efx, rx_err, efx->net_dev,
+ "RX DMA Q %d reports descriptor fetch error."
+ " RX Q %d is disabled.\n", ev_sub_data,
+ ev_sub_data);
+ efx_schedule_reset(efx, RESET_TYPE_RX_DESC_FETCH);
+ } else
+ efx_sriov_desc_fetch_err(efx, ev_sub_data);
break;
case FSE_BZ_TX_DSC_ERROR_EV:
- netif_err(efx, tx_err, efx->net_dev,
- "TX DMA Q %d reports descriptor fetch error."
- " TX Q %d is disabled.\n", ev_sub_data, ev_sub_data);
- efx_schedule_reset(efx, RESET_TYPE_TX_DESC_FETCH);
+ if (ev_sub_data < EFX_VI_BASE) {
+ netif_err(efx, tx_err, efx->net_dev,
+ "TX DMA Q %d reports descriptor fetch error."
+ " TX Q %d is disabled.\n", ev_sub_data,
+ ev_sub_data);
+ efx_schedule_reset(efx, RESET_TYPE_TX_DESC_FETCH);
+ } else
+ efx_sriov_desc_fetch_err(efx, ev_sub_data);
break;
default:
netif_vdbg(efx, hw, efx->net_dev,
@@ -1207,6 +1232,9 @@ int efx_nic_process_eventq(struct efx_channel *channel, int budget)
case FSE_AZ_EV_CODE_DRIVER_EV:
efx_handle_driver_event(channel, &event);
break;
+ case FSE_CZ_EV_CODE_USER_EV:
+ efx_sriov_event(channel, &event);
+ break;
case FSE_CZ_EV_CODE_MCDI_EV:
efx_mcdi_process_event(channel, &event);
break;
@@ -1609,6 +1637,15 @@ void efx_nic_fini_interrupt(struct efx_nic *efx)
free_irq(efx->legacy_irq, efx);
}
+/* Looks at available SRAM resources and works out how many queues we
+ * can support, and where things like descriptor caches should live.
+ *
+ * SRAM is split up as follows:
+ * 0 buftbl entries for channels
+ * efx->vf_buftbl_base buftbl entries for SR-IOV
+ * efx->rx_dc_base RX descriptor caches
+ * efx->tx_dc_base TX descriptor caches
+ */
void efx_nic_dimension_resources(struct efx_nic *efx, unsigned sram_lim_qw)
{
unsigned vi_count, buftbl_min;
@@ -1622,6 +1659,32 @@ void efx_nic_dimension_resources(struct efx_nic *efx, unsigned sram_lim_qw)
* sizeof(efx_qword_t) / EFX_BUF_SIZE);
vi_count = max(efx->n_channels, efx->n_tx_channels * EFX_TXQ_TYPES);
+#ifdef CONFIG_SFC_SRIOV
+ if (efx_sriov_wanted(efx)) {
+ unsigned vi_dc_entries, buftbl_free, entries_per_vf, vf_limit;
+
+ efx->vf_buftbl_base = buftbl_min;
+
+ vi_dc_entries = RX_DC_ENTRIES + TX_DC_ENTRIES;
+ vi_count = max(vi_count, EFX_VI_BASE);
+ buftbl_free = (sram_lim_qw - buftbl_min -
+ vi_count * vi_dc_entries);
+
+ entries_per_vf = ((vi_dc_entries + EFX_VF_BUFTBL_PER_VI) *
+ efx_vf_size(efx));
+ vf_limit = min(buftbl_free / entries_per_vf,
+ (1024U - EFX_VI_BASE) >> efx->vi_scale);
+
+ if (efx->vf_count > vf_limit) {
+ netif_err(efx, probe, efx->net_dev,
+ "Reducing VF count from from %d to %d\n",
+ efx->vf_count, vf_limit);
+ efx->vf_count = vf_limit;
+ }
+ vi_count += efx->vf_count * efx_vf_size(efx);
+ }
+#endif
+
efx->tx_dc_base = sram_lim_qw - vi_count * TX_DC_ENTRIES;
efx->rx_dc_base = efx->tx_dc_base - vi_count * RX_DC_ENTRIES;
}
diff --git a/drivers/net/ethernet/sfc/nic.h b/drivers/net/ethernet/sfc/nic.h
index 5df7da8b8ebf..246c4140453c 100644
--- a/drivers/net/ethernet/sfc/nic.h
+++ b/drivers/net/ethernet/sfc/nic.h
@@ -169,6 +169,95 @@ static inline struct efx_mcdi_mon *efx_mcdi_mon(struct efx_nic *efx)
}
#endif
+/*
+ * On the SFC9000 family each port is associated with 1 PCI physical
+ * function (PF) handled by sfc and a configurable number of virtual
+ * functions (VFs) that may be handled by some other driver, often in
+ * a VM guest. The queue pointer registers are mapped in both PF and
+ * VF BARs such that an 8K region provides access to a single RX, TX
+ * and event queue (collectively a Virtual Interface, VI or VNIC).
+ *
+ * The PF has access to all 1024 VIs while VFs are mapped to VIs
+ * according to VI_BASE and VI_SCALE: VF i has access to VIs numbered
+ * in range [VI_BASE + i << VI_SCALE, VI_BASE + i + 1 << VI_SCALE).
+ * The number of VIs and the VI_SCALE value are configurable but must
+ * be established at boot time by firmware.
+ */
+
+/* Maximum VI_SCALE parameter supported by Siena */
+#define EFX_VI_SCALE_MAX 6
+/* Base VI to use for SR-IOV. Must be aligned to (1 << EFX_VI_SCALE_MAX),
+ * so this is the smallest allowed value. */
+#define EFX_VI_BASE 128U
+/* Maximum number of VFs allowed */
+#define EFX_VF_COUNT_MAX 127
+/* Limit EVQs on VFs to be only 8k to reduce buffer table reservation */
+#define EFX_MAX_VF_EVQ_SIZE 8192UL
+/* The number of buffer table entries reserved for each VI on a VF */
+#define EFX_VF_BUFTBL_PER_VI \
+ ((EFX_MAX_VF_EVQ_SIZE + 2 * EFX_MAX_DMAQ_SIZE) * \
+ sizeof(efx_qword_t) / EFX_BUF_SIZE)
+
+#ifdef CONFIG_SFC_SRIOV
+
+static inline bool efx_sriov_wanted(struct efx_nic *efx)
+{
+ return efx->vf_count != 0;
+}
+static inline bool efx_sriov_enabled(struct efx_nic *efx)
+{
+ return efx->vf_init_count != 0;
+}
+static inline unsigned int efx_vf_size(struct efx_nic *efx)
+{
+ return 1 << efx->vi_scale;
+}
+
+extern int efx_init_sriov(void);
+extern void efx_sriov_probe(struct efx_nic *efx);
+extern int efx_sriov_init(struct efx_nic *efx);
+extern void efx_sriov_mac_address_changed(struct efx_nic *efx);
+extern void efx_sriov_tx_flush_done(struct efx_nic *efx, efx_qword_t *event);
+extern void efx_sriov_rx_flush_done(struct efx_nic *efx, efx_qword_t *event);
+extern void efx_sriov_event(struct efx_channel *channel, efx_qword_t *event);
+extern void efx_sriov_desc_fetch_err(struct efx_nic *efx, unsigned dmaq);
+extern void efx_sriov_flr(struct efx_nic *efx, unsigned flr);
+extern void efx_sriov_reset(struct efx_nic *efx);
+extern void efx_sriov_fini(struct efx_nic *efx);
+extern void efx_fini_sriov(void);
+
+#else
+
+static inline bool efx_sriov_wanted(struct efx_nic *efx) { return false; }
+static inline bool efx_sriov_enabled(struct efx_nic *efx) { return false; }
+static inline unsigned int efx_vf_size(struct efx_nic *efx) { return 0; }
+
+static inline int efx_init_sriov(void) { return 0; }
+static inline void efx_sriov_probe(struct efx_nic *efx) {}
+static inline int efx_sriov_init(struct efx_nic *efx) { return -EOPNOTSUPP; }
+static inline void efx_sriov_mac_address_changed(struct efx_nic *efx) {}
+static inline void efx_sriov_tx_flush_done(struct efx_nic *efx,
+ efx_qword_t *event) {}
+static inline void efx_sriov_rx_flush_done(struct efx_nic *efx,
+ efx_qword_t *event) {}
+static inline void efx_sriov_event(struct efx_channel *channel,
+ efx_qword_t *event) {}
+static inline void efx_sriov_desc_fetch_err(struct efx_nic *efx, unsigned dmaq) {}
+static inline void efx_sriov_flr(struct efx_nic *efx, unsigned flr) {}
+static inline void efx_sriov_reset(struct efx_nic *efx) {}
+static inline void efx_sriov_fini(struct efx_nic *efx) {}
+static inline void efx_fini_sriov(void) {}
+
+#endif
+
+extern int efx_sriov_set_vf_mac(struct net_device *dev, int vf, u8 *mac);
+extern int efx_sriov_set_vf_vlan(struct net_device *dev, int vf,
+ u16 vlan, u8 qos);
+extern int efx_sriov_get_vf_config(struct net_device *dev, int vf,
+ struct ifla_vf_info *ivf);
+extern int efx_sriov_set_vf_spoofchk(struct net_device *net_dev, int vf,
+ bool spoofchk);
+
extern const struct efx_nic_type falcon_a1_nic_type;
extern const struct efx_nic_type falcon_b0_nic_type;
extern const struct efx_nic_type siena_a0_nic_type;
diff --git a/drivers/net/ethernet/sfc/siena.c b/drivers/net/ethernet/sfc/siena.c
index 657f3fa93bcf..7bea79017a05 100644
--- a/drivers/net/ethernet/sfc/siena.c
+++ b/drivers/net/ethernet/sfc/siena.c
@@ -313,6 +313,8 @@ static int siena_probe_nic(struct efx_nic *efx)
if (rc)
goto fail5;
+ efx_sriov_probe(efx);
+
return 0;
fail5:
diff --git a/drivers/net/ethernet/sfc/siena_sriov.c b/drivers/net/ethernet/sfc/siena_sriov.c
new file mode 100644
index 000000000000..5c6839ec3a83
--- /dev/null
+++ b/drivers/net/ethernet/sfc/siena_sriov.c
@@ -0,0 +1,1642 @@
+/****************************************************************************
+ * Driver for Solarflare Solarstorm network controllers and boards
+ * Copyright 2010-2011 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/pci.h>
+#include <linux/module.h>
+#include "net_driver.h"
+#include "efx.h"
+#include "nic.h"
+#include "io.h"
+#include "mcdi.h"
+#include "filter.h"
+#include "mcdi_pcol.h"
+#include "regs.h"
+#include "vfdi.h"
+
+/* Number of longs required to track all the VIs in a VF */
+#define VI_MASK_LENGTH BITS_TO_LONGS(1 << EFX_VI_SCALE_MAX)
+
+/**
+ * enum efx_vf_tx_filter_mode - TX MAC filtering behaviour
+ * @VF_TX_FILTER_OFF: Disabled
+ * @VF_TX_FILTER_AUTO: Enabled if MAC address assigned to VF and only
+ * 2 TX queues allowed per VF.
+ * @VF_TX_FILTER_ON: Enabled
+ */
+enum efx_vf_tx_filter_mode {
+ VF_TX_FILTER_OFF,
+ VF_TX_FILTER_AUTO,
+ VF_TX_FILTER_ON,
+};
+
+/**
+ * struct efx_vf - Back-end resource and protocol state for a PCI VF
+ * @efx: The Efx NIC owning this VF
+ * @pci_rid: The PCI requester ID for this VF
+ * @pci_name: The PCI name (formatted address) of this VF
+ * @index: Index of VF within its port and PF.
+ * @req: VFDI incoming request work item. Incoming USR_EV events are received
+ * by the NAPI handler, but must be handled by executing MCDI requests
+ * inside a work item.
+ * @req_addr: VFDI incoming request DMA address (in VF's PCI address space).
+ * @req_type: Expected next incoming (from VF) %VFDI_EV_TYPE member.
+ * @req_seqno: Expected next incoming (from VF) %VFDI_EV_SEQ member.
+ * @msg_seqno: Next %VFDI_EV_SEQ member to reply to VF. Protected by
+ * @status_lock
+ * @busy: VFDI request queued to be processed or being processed. Receiving
+ * a VFDI request when @busy is set is an error condition.
+ * @buf: Incoming VFDI requests are DMA from the VF into this buffer.
+ * @buftbl_base: Buffer table entries for this VF start at this index.
+ * @rx_filtering: Receive filtering has been requested by the VF driver.
+ * @rx_filter_flags: The flags sent in the %VFDI_OP_INSERT_FILTER request.
+ * @rx_filter_qid: VF relative qid for RX filter requested by VF.
+ * @rx_filter_id: Receive MAC filter ID. Only one filter per VF is supported.
+ * @tx_filter_mode: Transmit MAC filtering mode.
+ * @tx_filter_id: Transmit MAC filter ID.
+ * @addr: The MAC address and outer vlan tag of the VF.
+ * @status_addr: VF DMA address of page for &struct vfdi_status updates.
+ * @status_lock: Mutex protecting @msg_seqno, @status_addr, @addr,
+ * @peer_page_addrs and @peer_page_count from simultaneous
+ * updates by the VM and consumption by
+ * efx_sriov_update_vf_addr()
+ * @peer_page_addrs: Pointer to an array of guest pages for local addresses.
+ * @peer_page_count: Number of entries in @peer_page_count.
+ * @evq0_addrs: Array of guest pages backing evq0.
+ * @evq0_count: Number of entries in @evq0_addrs.
+ * @flush_waitq: wait queue used by %VFDI_OP_FINI_ALL_QUEUES handler
+ * to wait for flush completions.
+ * @txq_lock: Mutex for TX queue allocation.
+ * @txq_mask: Mask of initialized transmit queues.
+ * @txq_count: Number of initialized transmit queues.
+ * @rxq_mask: Mask of initialized receive queues.
+ * @rxq_count: Number of initialized receive queues.
+ * @rxq_retry_mask: Mask or receive queues that need to be flushed again
+ * due to flush failure.
+ * @rxq_retry_count: Number of receive queues in @rxq_retry_mask.
+ * @reset_work: Work item to schedule a VF reset.
+ */
+struct efx_vf {
+ struct efx_nic *efx;
+ unsigned int pci_rid;
+ char pci_name[13]; /* dddd:bb:dd.f */
+ unsigned int index;
+ struct work_struct req;
+ u64 req_addr;
+ int req_type;
+ unsigned req_seqno;
+ unsigned msg_seqno;
+ bool busy;
+ struct efx_buffer buf;
+ unsigned buftbl_base;
+ bool rx_filtering;
+ enum efx_filter_flags rx_filter_flags;
+ unsigned rx_filter_qid;
+ int rx_filter_id;
+ enum efx_vf_tx_filter_mode tx_filter_mode;
+ int tx_filter_id;
+ struct vfdi_endpoint addr;
+ u64 status_addr;
+ struct mutex status_lock;
+ u64 *peer_page_addrs;
+ unsigned peer_page_count;
+ u64 evq0_addrs[EFX_MAX_VF_EVQ_SIZE * sizeof(efx_qword_t) /
+ EFX_BUF_SIZE];
+ unsigned evq0_count;
+ wait_queue_head_t flush_waitq;
+ struct mutex txq_lock;
+ unsigned long txq_mask[VI_MASK_LENGTH];
+ unsigned txq_count;
+ unsigned long rxq_mask[VI_MASK_LENGTH];
+ unsigned rxq_count;
+ unsigned long rxq_retry_mask[VI_MASK_LENGTH];
+ atomic_t rxq_retry_count;
+ struct work_struct reset_work;
+};
+
+struct efx_memcpy_req {
+ unsigned int from_rid;
+ void *from_buf;
+ u64 from_addr;
+ unsigned int to_rid;
+ u64 to_addr;
+ unsigned length;
+};
+
+/**
+ * struct efx_local_addr - A MAC address on the vswitch without a VF.
+ *
+ * Siena does not have a switch, so VFs can't transmit data to each
+ * other. Instead the VFs must be made aware of the local addresses
+ * on the vswitch, so that they can arrange for an alternative
+ * software datapath to be used.
+ *
+ * @link: List head for insertion into efx->local_addr_list.
+ * @addr: Ethernet address
+ */
+struct efx_local_addr {
+ struct list_head link;
+ u8 addr[ETH_ALEN];
+};
+
+/**
+ * struct efx_endpoint_page - Page of vfdi_endpoint structures
+ *
+ * @link: List head for insertion into efx->local_page_list.
+ * @ptr: Pointer to page.
+ * @addr: DMA address of page.
+ */
+struct efx_endpoint_page {
+ struct list_head link;
+ void *ptr;
+ dma_addr_t addr;
+};
+
+/* Buffer table entries are reserved txq0,rxq0,evq0,txq1,rxq1,evq1 */
+#define EFX_BUFTBL_TXQ_BASE(_vf, _qid) \
+ ((_vf)->buftbl_base + EFX_VF_BUFTBL_PER_VI * (_qid))
+#define EFX_BUFTBL_RXQ_BASE(_vf, _qid) \
+ (EFX_BUFTBL_TXQ_BASE(_vf, _qid) + \
+ (EFX_MAX_DMAQ_SIZE * sizeof(efx_qword_t) / EFX_BUF_SIZE))
+#define EFX_BUFTBL_EVQ_BASE(_vf, _qid) \
+ (EFX_BUFTBL_TXQ_BASE(_vf, _qid) + \
+ (2 * EFX_MAX_DMAQ_SIZE * sizeof(efx_qword_t) / EFX_BUF_SIZE))
+
+#define EFX_FIELD_MASK(_field) \
+ ((1 << _field ## _WIDTH) - 1)
+
+/* VFs can only use this many transmit channels */
+static unsigned int vf_max_tx_channels = 2;
+module_param(vf_max_tx_channels, uint, 0444);
+MODULE_PARM_DESC(vf_max_tx_channels,
+ "Limit the number of TX channels VFs can use");
+
+static int max_vfs = -1;
+module_param(max_vfs, int, 0444);
+MODULE_PARM_DESC(max_vfs,
+ "Reduce the number of VFs initialized by the driver");
+
+/* Workqueue used by VFDI communication. We can't use the global
+ * workqueue because it may be running the VF driver's probe()
+ * routine, which will be blocked there waiting for a VFDI response.
+ */
+static struct workqueue_struct *vfdi_workqueue;
+
+static unsigned abs_index(struct efx_vf *vf, unsigned index)
+{
+ return EFX_VI_BASE + vf->index * efx_vf_size(vf->efx) + index;
+}
+
+static int efx_sriov_cmd(struct efx_nic *efx, bool enable,
+ unsigned *vi_scale_out, unsigned *vf_total_out)
+{
+ u8 inbuf[MC_CMD_SRIOV_IN_LEN];
+ u8 outbuf[MC_CMD_SRIOV_OUT_LEN];
+ unsigned vi_scale, vf_total;
+ size_t outlen;
+ int rc;
+
+ MCDI_SET_DWORD(inbuf, SRIOV_IN_ENABLE, enable ? 1 : 0);
+ MCDI_SET_DWORD(inbuf, SRIOV_IN_VI_BASE, EFX_VI_BASE);
+ MCDI_SET_DWORD(inbuf, SRIOV_IN_VF_COUNT, efx->vf_count);
+
+ rc = efx_mcdi_rpc(efx, MC_CMD_SRIOV, inbuf, MC_CMD_SRIOV_IN_LEN,
+ outbuf, MC_CMD_SRIOV_OUT_LEN, &outlen);
+ if (rc)
+ return rc;
+ if (outlen < MC_CMD_SRIOV_OUT_LEN)
+ return -EIO;
+
+ vf_total = MCDI_DWORD(outbuf, SRIOV_OUT_VF_TOTAL);
+ vi_scale = MCDI_DWORD(outbuf, SRIOV_OUT_VI_SCALE);
+ if (vi_scale > EFX_VI_SCALE_MAX)
+ return -EOPNOTSUPP;
+
+ if (vi_scale_out)
+ *vi_scale_out = vi_scale;
+ if (vf_total_out)
+ *vf_total_out = vf_total;
+
+ return 0;
+}
+
+static void efx_sriov_usrev(struct efx_nic *efx, bool enabled)
+{
+ efx_oword_t reg;
+
+ EFX_POPULATE_OWORD_2(reg,
+ FRF_CZ_USREV_DIS, enabled ? 0 : 1,
+ FRF_CZ_DFLT_EVQ, efx->vfdi_channel->channel);
+ efx_writeo(efx, &reg, FR_CZ_USR_EV_CFG);
+}
+
+static int efx_sriov_memcpy(struct efx_nic *efx, struct efx_memcpy_req *req,
+ unsigned int count)
+{
+ u8 *inbuf, *record;
+ unsigned int used;
+ u32 from_rid, from_hi, from_lo;
+ int rc;
+
+ mb(); /* Finish writing source/reading dest before DMA starts */
+
+ used = MC_CMD_MEMCPY_IN_LEN(count);
+ if (WARN_ON(used > MCDI_CTL_SDU_LEN_MAX))
+ return -ENOBUFS;
+
+ /* Allocate room for the largest request */
+ inbuf = kzalloc(MCDI_CTL_SDU_LEN_MAX, GFP_KERNEL);
+ if (inbuf == NULL)
+ return -ENOMEM;
+
+ record = inbuf;
+ MCDI_SET_DWORD(record, MEMCPY_IN_RECORD, count);
+ while (count-- > 0) {
+ MCDI_SET_DWORD(record, MEMCPY_RECORD_TYPEDEF_TO_RID,
+ req->to_rid);
+ MCDI_SET_DWORD(record, MEMCPY_RECORD_TYPEDEF_TO_ADDR_LO,
+ (u32)req->to_addr);
+ MCDI_SET_DWORD(record, MEMCPY_RECORD_TYPEDEF_TO_ADDR_HI,
+ (u32)(req->to_addr >> 32));
+ if (req->from_buf == NULL) {
+ from_rid = req->from_rid;
+ from_lo = (u32)req->from_addr;
+ from_hi = (u32)(req->from_addr >> 32);
+ } else {
+ if (WARN_ON(used + req->length > MCDI_CTL_SDU_LEN_MAX)) {
+ rc = -ENOBUFS;
+ goto out;
+ }
+
+ from_rid = MC_CMD_MEMCPY_RECORD_TYPEDEF_RID_INLINE;
+ from_lo = used;
+ from_hi = 0;
+ memcpy(inbuf + used, req->from_buf, req->length);
+ used += req->length;
+ }
+
+ MCDI_SET_DWORD(record, MEMCPY_RECORD_TYPEDEF_FROM_RID, from_rid);
+ MCDI_SET_DWORD(record, MEMCPY_RECORD_TYPEDEF_FROM_ADDR_LO,
+ from_lo);
+ MCDI_SET_DWORD(record, MEMCPY_RECORD_TYPEDEF_FROM_ADDR_HI,
+ from_hi);
+ MCDI_SET_DWORD(record, MEMCPY_RECORD_TYPEDEF_LENGTH,
+ req->length);
+
+ ++req;
+ record += MC_CMD_MEMCPY_IN_RECORD_LEN;
+ }
+
+ rc = efx_mcdi_rpc(efx, MC_CMD_MEMCPY, inbuf, used, NULL, 0, NULL);
+out:
+ kfree(inbuf);
+
+ mb(); /* Don't write source/read dest before DMA is complete */
+
+ return rc;
+}
+
+/* The TX filter is entirely controlled by this driver, and is modified
+ * underneath the feet of the VF
+ */
+static void efx_sriov_reset_tx_filter(struct efx_vf *vf)
+{
+ struct efx_nic *efx = vf->efx;
+ struct efx_filter_spec filter;
+ u16 vlan;
+ int rc;
+
+ if (vf->tx_filter_id != -1) {
+ efx_filter_remove_id_safe(efx, EFX_FILTER_PRI_REQUIRED,
+ vf->tx_filter_id);
+ netif_dbg(efx, hw, efx->net_dev, "Removed vf %s tx filter %d\n",
+ vf->pci_name, vf->tx_filter_id);
+ vf->tx_filter_id = -1;
+ }
+
+ if (is_zero_ether_addr(vf->addr.mac_addr))
+ return;
+
+ /* Turn on TX filtering automatically if not explicitly
+ * enabled or disabled.
+ */
+ if (vf->tx_filter_mode == VF_TX_FILTER_AUTO && vf_max_tx_channels <= 2)
+ vf->tx_filter_mode = VF_TX_FILTER_ON;
+
+ vlan = ntohs(vf->addr.tci) & VLAN_VID_MASK;
+ efx_filter_init_tx(&filter, abs_index(vf, 0));
+ rc = efx_filter_set_eth_local(&filter,
+ vlan ? vlan : EFX_FILTER_VID_UNSPEC,
+ vf->addr.mac_addr);
+ BUG_ON(rc);
+
+ rc = efx_filter_insert_filter(efx, &filter, true);
+ if (rc < 0) {
+ netif_warn(efx, hw, efx->net_dev,
+ "Unable to migrate tx filter for vf %s\n",
+ vf->pci_name);
+ } else {
+ netif_dbg(efx, hw, efx->net_dev, "Inserted vf %s tx filter %d\n",
+ vf->pci_name, rc);
+ vf->tx_filter_id = rc;
+ }
+}
+
+/* The RX filter is managed here on behalf of the VF driver */
+static void efx_sriov_reset_rx_filter(struct efx_vf *vf)
+{
+ struct efx_nic *efx = vf->efx;
+ struct efx_filter_spec filter;
+ u16 vlan;
+ int rc;
+
+ if (vf->rx_filter_id != -1) {
+ efx_filter_remove_id_safe(efx, EFX_FILTER_PRI_REQUIRED,
+ vf->rx_filter_id);
+ netif_dbg(efx, hw, efx->net_dev, "Removed vf %s rx filter %d\n",
+ vf->pci_name, vf->rx_filter_id);
+ vf->rx_filter_id = -1;
+ }
+
+ if (!vf->rx_filtering || is_zero_ether_addr(vf->addr.mac_addr))
+ return;
+
+ vlan = ntohs(vf->addr.tci) & VLAN_VID_MASK;
+ efx_filter_init_rx(&filter, EFX_FILTER_PRI_REQUIRED,
+ vf->rx_filter_flags,
+ abs_index(vf, vf->rx_filter_qid));
+ rc = efx_filter_set_eth_local(&filter,
+ vlan ? vlan : EFX_FILTER_VID_UNSPEC,
+ vf->addr.mac_addr);
+ BUG_ON(rc);
+
+ rc = efx_filter_insert_filter(efx, &filter, true);
+ if (rc < 0) {
+ netif_warn(efx, hw, efx->net_dev,
+ "Unable to insert rx filter for vf %s\n",
+ vf->pci_name);
+ } else {
+ netif_dbg(efx, hw, efx->net_dev, "Inserted vf %s rx filter %d\n",
+ vf->pci_name, rc);
+ vf->rx_filter_id = rc;
+ }
+}
+
+static void __efx_sriov_update_vf_addr(struct efx_vf *vf)
+{
+ efx_sriov_reset_tx_filter(vf);
+ efx_sriov_reset_rx_filter(vf);
+ queue_work(vfdi_workqueue, &vf->efx->peer_work);
+}
+
+/* Push the peer list to this VF. The caller must hold status_lock to interlock
+ * with VFDI requests, and they must be serialised against manipulation of
+ * local_page_list, either by acquiring local_lock or by running from
+ * efx_sriov_peer_work()
+ */
+static void __efx_sriov_push_vf_status(struct efx_vf *vf)
+{
+ struct efx_nic *efx = vf->efx;
+ struct vfdi_status *status = efx->vfdi_status.addr;
+ struct efx_memcpy_req copy[4];
+ struct efx_endpoint_page *epp;
+ unsigned int pos, count;
+ unsigned data_offset;
+ efx_qword_t event;
+
+ WARN_ON(!mutex_is_locked(&vf->status_lock));
+ WARN_ON(!vf->status_addr);
+
+ status->local = vf->addr;
+ status->generation_end = ++status->generation_start;
+
+ memset(copy, '\0', sizeof(copy));
+ /* Write generation_start */
+ copy[0].from_buf = &status->generation_start;
+ copy[0].to_rid = vf->pci_rid;
+ copy[0].to_addr = vf->status_addr + offsetof(struct vfdi_status,
+ generation_start);
+ copy[0].length = sizeof(status->generation_start);
+ /* DMA the rest of the structure (excluding the generations). This
+ * assumes that the non-generation portion of vfdi_status is in
+ * one chunk starting at the version member.
+ */
+ data_offset = offsetof(struct vfdi_status, version);
+ copy[1].from_rid = efx->pci_dev->devfn;
+ copy[1].from_addr = efx->vfdi_status.dma_addr + data_offset;
+ copy[1].to_rid = vf->pci_rid;
+ copy[1].to_addr = vf->status_addr + data_offset;
+ copy[1].length = status->length - data_offset;
+
+ /* Copy the peer pages */
+ pos = 2;
+ count = 0;
+ list_for_each_entry(epp, &efx->local_page_list, link) {
+ if (count == vf->peer_page_count) {
+ /* The VF driver will know they need to provide more
+ * pages because peer_addr_count is too large.
+ */
+ break;
+ }
+ copy[pos].from_buf = NULL;
+ copy[pos].from_rid = efx->pci_dev->devfn;
+ copy[pos].from_addr = epp->addr;
+ copy[pos].to_rid = vf->pci_rid;
+ copy[pos].to_addr = vf->peer_page_addrs[count];
+ copy[pos].length = EFX_PAGE_SIZE;
+
+ if (++pos == ARRAY_SIZE(copy)) {
+ efx_sriov_memcpy(efx, copy, ARRAY_SIZE(copy));
+ pos = 0;
+ }
+ ++count;
+ }
+
+ /* Write generation_end */
+ copy[pos].from_buf = &status->generation_end;
+ copy[pos].to_rid = vf->pci_rid;
+ copy[pos].to_addr = vf->status_addr + offsetof(struct vfdi_status,
+ generation_end);
+ copy[pos].length = sizeof(status->generation_end);
+ efx_sriov_memcpy(efx, copy, pos + 1);
+
+ /* Notify the guest */
+ EFX_POPULATE_QWORD_3(event,
+ FSF_AZ_EV_CODE, FSE_CZ_EV_CODE_USER_EV,
+ VFDI_EV_SEQ, (vf->msg_seqno & 0xff),
+ VFDI_EV_TYPE, VFDI_EV_TYPE_STATUS);
+ ++vf->msg_seqno;
+ efx_generate_event(efx, EFX_VI_BASE + vf->index * efx_vf_size(efx),
+ &event);
+}
+
+static void efx_sriov_bufs(struct efx_nic *efx, unsigned offset,
+ u64 *addr, unsigned count)
+{
+ efx_qword_t buf;
+ unsigned pos;
+
+ for (pos = 0; pos < count; ++pos) {
+ EFX_POPULATE_QWORD_3(buf,
+ FRF_AZ_BUF_ADR_REGION, 0,
+ FRF_AZ_BUF_ADR_FBUF,
+ addr ? addr[pos] >> 12 : 0,
+ FRF_AZ_BUF_OWNER_ID_FBUF, 0);
+ efx_sram_writeq(efx, efx->membase + FR_BZ_BUF_FULL_TBL,
+ &buf, offset + pos);
+ }
+}
+
+static bool bad_vf_index(struct efx_nic *efx, unsigned index)
+{
+ return index >= efx_vf_size(efx);
+}
+
+static bool bad_buf_count(unsigned buf_count, unsigned max_entry_count)
+{
+ unsigned max_buf_count = max_entry_count *
+ sizeof(efx_qword_t) / EFX_BUF_SIZE;
+
+ return ((buf_count & (buf_count - 1)) || buf_count > max_buf_count);
+}
+
+/* Check that VI specified by per-port index belongs to a VF.
+ * Optionally set VF index and VI index within the VF.
+ */
+static bool map_vi_index(struct efx_nic *efx, unsigned abs_index,
+ struct efx_vf **vf_out, unsigned *rel_index_out)
+{
+ unsigned vf_i;
+
+ if (abs_index < EFX_VI_BASE)
+ return true;
+ vf_i = (abs_index - EFX_VI_BASE) * efx_vf_size(efx);
+ if (vf_i >= efx->vf_init_count)
+ return true;
+
+ if (vf_out)
+ *vf_out = efx->vf + vf_i;
+ if (rel_index_out)
+ *rel_index_out = abs_index % efx_vf_size(efx);
+ return false;
+}
+
+static int efx_vfdi_init_evq(struct efx_vf *vf)
+{
+ struct efx_nic *efx = vf->efx;
+ struct vfdi_req *req = vf->buf.addr;
+ unsigned vf_evq = req->u.init_evq.index;
+ unsigned buf_count = req->u.init_evq.buf_count;
+ unsigned abs_evq = abs_index(vf, vf_evq);
+ unsigned buftbl = EFX_BUFTBL_EVQ_BASE(vf, vf_evq);
+ efx_oword_t reg;
+
+ if (bad_vf_index(efx, vf_evq) ||
+ bad_buf_count(buf_count, EFX_MAX_VF_EVQ_SIZE)) {
+ if (net_ratelimit())
+ netif_err(efx, hw, efx->net_dev,
+ "ERROR: Invalid INIT_EVQ from %s: evq %d bufs %d\n",
+ vf->pci_name, vf_evq, buf_count);
+ return VFDI_RC_EINVAL;
+ }
+
+ efx_sriov_bufs(efx, buftbl, req->u.init_evq.addr, buf_count);
+
+ EFX_POPULATE_OWORD_3(reg,
+ FRF_CZ_TIMER_Q_EN, 1,
+ FRF_CZ_HOST_NOTIFY_MODE, 0,
+ FRF_CZ_TIMER_MODE, FFE_CZ_TIMER_MODE_DIS);
+ efx_writeo_table(efx, &reg, FR_BZ_TIMER_TBL, abs_evq);
+ EFX_POPULATE_OWORD_3(reg,
+ FRF_AZ_EVQ_EN, 1,
+ FRF_AZ_EVQ_SIZE, __ffs(buf_count),
+ FRF_AZ_EVQ_BUF_BASE_ID, buftbl);
+ efx_writeo_table(efx, &reg, FR_BZ_EVQ_PTR_TBL, abs_evq);
+
+ if (vf_evq == 0) {
+ memcpy(vf->evq0_addrs, req->u.init_evq.addr,
+ buf_count * sizeof(u64));
+ vf->evq0_count = buf_count;
+ }
+
+ return VFDI_RC_SUCCESS;
+}
+
+static int efx_vfdi_init_rxq(struct efx_vf *vf)
+{
+ struct efx_nic *efx = vf->efx;
+ struct vfdi_req *req = vf->buf.addr;
+ unsigned vf_rxq = req->u.init_rxq.index;
+ unsigned vf_evq = req->u.init_rxq.evq;
+ unsigned buf_count = req->u.init_rxq.buf_count;
+ unsigned buftbl = EFX_BUFTBL_RXQ_BASE(vf, vf_rxq);
+ unsigned label;
+ efx_oword_t reg;
+
+ if (bad_vf_index(efx, vf_evq) || bad_vf_index(efx, vf_rxq) ||
+ bad_buf_count(buf_count, EFX_MAX_DMAQ_SIZE)) {
+ if (net_ratelimit())
+ netif_err(efx, hw, efx->net_dev,
+ "ERROR: Invalid INIT_RXQ from %s: rxq %d evq %d "
+ "buf_count %d\n", vf->pci_name, vf_rxq,
+ vf_evq, buf_count);
+ return VFDI_RC_EINVAL;
+ }
+ if (__test_and_set_bit(req->u.init_rxq.index, vf->rxq_mask))
+ ++vf->rxq_count;
+ efx_sriov_bufs(efx, buftbl, req->u.init_rxq.addr, buf_count);
+
+ label = req->u.init_rxq.label & EFX_FIELD_MASK(FRF_AZ_RX_DESCQ_LABEL);
+ EFX_POPULATE_OWORD_6(reg,
+ FRF_AZ_RX_DESCQ_BUF_BASE_ID, buftbl,
+ FRF_AZ_RX_DESCQ_EVQ_ID, abs_index(vf, vf_evq),
+ FRF_AZ_RX_DESCQ_LABEL, label,
+ FRF_AZ_RX_DESCQ_SIZE, __ffs(buf_count),
+ FRF_AZ_RX_DESCQ_JUMBO,
+ !!(req->u.init_rxq.flags &
+ VFDI_RXQ_FLAG_SCATTER_EN),
+ FRF_AZ_RX_DESCQ_EN, 1);
+ efx_writeo_table(efx, &reg, FR_BZ_RX_DESC_PTR_TBL,
+ abs_index(vf, vf_rxq));
+
+ return VFDI_RC_SUCCESS;
+}
+
+static int efx_vfdi_init_txq(struct efx_vf *vf)
+{
+ struct efx_nic *efx = vf->efx;
+ struct vfdi_req *req = vf->buf.addr;
+ unsigned vf_txq = req->u.init_txq.index;
+ unsigned vf_evq = req->u.init_txq.evq;
+ unsigned buf_count = req->u.init_txq.buf_count;
+ unsigned buftbl = EFX_BUFTBL_TXQ_BASE(vf, vf_txq);
+ unsigned label, eth_filt_en;
+ efx_oword_t reg;
+
+ if (bad_vf_index(efx, vf_evq) || bad_vf_index(efx, vf_txq) ||
+ vf_txq >= vf_max_tx_channels ||
+ bad_buf_count(buf_count, EFX_MAX_DMAQ_SIZE)) {
+ if (net_ratelimit())
+ netif_err(efx, hw, efx->net_dev,
+ "ERROR: Invalid INIT_TXQ from %s: txq %d evq %d "
+ "buf_count %d\n", vf->pci_name, vf_txq,
+ vf_evq, buf_count);
+ return VFDI_RC_EINVAL;
+ }
+
+ mutex_lock(&vf->txq_lock);
+ if (__test_and_set_bit(req->u.init_txq.index, vf->txq_mask))
+ ++vf->txq_count;
+ mutex_unlock(&vf->txq_lock);
+ efx_sriov_bufs(efx, buftbl, req->u.init_txq.addr, buf_count);
+
+ eth_filt_en = vf->tx_filter_mode == VF_TX_FILTER_ON;
+
+ label = req->u.init_txq.label & EFX_FIELD_MASK(FRF_AZ_TX_DESCQ_LABEL);
+ EFX_POPULATE_OWORD_8(reg,
+ FRF_CZ_TX_DPT_Q_MASK_WIDTH, min(efx->vi_scale, 1U),
+ FRF_CZ_TX_DPT_ETH_FILT_EN, eth_filt_en,
+ FRF_AZ_TX_DESCQ_EN, 1,
+ FRF_AZ_TX_DESCQ_BUF_BASE_ID, buftbl,
+ FRF_AZ_TX_DESCQ_EVQ_ID, abs_index(vf, vf_evq),
+ FRF_AZ_TX_DESCQ_LABEL, label,
+ FRF_AZ_TX_DESCQ_SIZE, __ffs(buf_count),
+ FRF_BZ_TX_NON_IP_DROP_DIS, 1);
+ efx_writeo_table(efx, &reg, FR_BZ_TX_DESC_PTR_TBL,
+ abs_index(vf, vf_txq));
+
+ return VFDI_RC_SUCCESS;
+}
+
+/* Returns true when efx_vfdi_fini_all_queues should wake */
+static bool efx_vfdi_flush_wake(struct efx_vf *vf)
+{
+ /* Ensure that all updates are visible to efx_vfdi_fini_all_queues() */
+ smp_mb();
+
+ return (!vf->txq_count && !vf->rxq_count) ||
+ atomic_read(&vf->rxq_retry_count);
+}
+
+static void efx_vfdi_flush_clear(struct efx_vf *vf)
+{
+ memset(vf->txq_mask, 0, sizeof(vf->txq_mask));
+ vf->txq_count = 0;
+ memset(vf->rxq_mask, 0, sizeof(vf->rxq_mask));
+ vf->rxq_count = 0;
+ memset(vf->rxq_retry_mask, 0, sizeof(vf->rxq_retry_mask));
+ atomic_set(&vf->rxq_retry_count, 0);
+}
+
+static int efx_vfdi_fini_all_queues(struct efx_vf *vf)
+{
+ struct efx_nic *efx = vf->efx;
+ efx_oword_t reg;
+ unsigned count = efx_vf_size(efx);
+ unsigned vf_offset = EFX_VI_BASE + vf->index * efx_vf_size(efx);
+ unsigned timeout = HZ;
+ unsigned index, rxqs_count;
+ __le32 *rxqs;
+ int rc;
+
+ rxqs = kmalloc(count * sizeof(*rxqs), GFP_KERNEL);
+ if (rxqs == NULL)
+ return VFDI_RC_ENOMEM;
+
+ rtnl_lock();
+ if (efx->fc_disable++ == 0)
+ efx_mcdi_set_mac(efx);
+ rtnl_unlock();
+
+ /* Flush all the initialized queues */
+ rxqs_count = 0;
+ for (index = 0; index < count; ++index) {
+ if (test_bit(index, vf->txq_mask)) {
+ EFX_POPULATE_OWORD_2(reg,
+ FRF_AZ_TX_FLUSH_DESCQ_CMD, 1,
+ FRF_AZ_TX_FLUSH_DESCQ,
+ vf_offset + index);
+ efx_writeo(efx, &reg, FR_AZ_TX_FLUSH_DESCQ);
+ }
+ if (test_bit(index, vf->rxq_mask))
+ rxqs[rxqs_count++] = cpu_to_le32(vf_offset + index);
+ }
+
+ atomic_set(&vf->rxq_retry_count, 0);
+ while (timeout && (vf->rxq_count || vf->txq_count)) {
+ rc = efx_mcdi_rpc(efx, MC_CMD_FLUSH_RX_QUEUES, (u8 *)rxqs,
+ rxqs_count * sizeof(*rxqs), NULL, 0, NULL);
+ WARN_ON(rc < 0);
+
+ timeout = wait_event_timeout(vf->flush_waitq,
+ efx_vfdi_flush_wake(vf),
+ timeout);
+ rxqs_count = 0;
+ for (index = 0; index < count; ++index) {
+ if (test_and_clear_bit(index, vf->rxq_retry_mask)) {
+ atomic_dec(&vf->rxq_retry_count);
+ rxqs[rxqs_count++] =
+ cpu_to_le32(vf_offset + index);
+ }
+ }
+ }
+
+ rtnl_lock();
+ if (--efx->fc_disable == 0)
+ efx_mcdi_set_mac(efx);
+ rtnl_unlock();
+
+ /* Irrespective of success/failure, fini the queues */
+ EFX_ZERO_OWORD(reg);
+ for (index = 0; index < count; ++index) {
+ efx_writeo_table(efx, &reg, FR_BZ_RX_DESC_PTR_TBL,
+ vf_offset + index);
+ efx_writeo_table(efx, &reg, FR_BZ_TX_DESC_PTR_TBL,
+ vf_offset + index);
+ efx_writeo_table(efx, &reg, FR_BZ_EVQ_PTR_TBL,
+ vf_offset + index);
+ efx_writeo_table(efx, &reg, FR_BZ_TIMER_TBL,
+ vf_offset + index);
+ }
+ efx_sriov_bufs(efx, vf->buftbl_base, NULL,
+ EFX_VF_BUFTBL_PER_VI * efx_vf_size(efx));
+ kfree(rxqs);
+ efx_vfdi_flush_clear(vf);
+
+ vf->evq0_count = 0;
+
+ return timeout ? 0 : VFDI_RC_ETIMEDOUT;
+}
+
+static int efx_vfdi_insert_filter(struct efx_vf *vf)
+{
+ struct efx_nic *efx = vf->efx;
+ struct vfdi_req *req = vf->buf.addr;
+ unsigned vf_rxq = req->u.mac_filter.rxq;
+ unsigned flags;
+
+ if (bad_vf_index(efx, vf_rxq) || vf->rx_filtering) {
+ if (net_ratelimit())
+ netif_err(efx, hw, efx->net_dev,
+ "ERROR: Invalid INSERT_FILTER from %s: rxq %d "
+ "flags 0x%x\n", vf->pci_name, vf_rxq,
+ req->u.mac_filter.flags);
+ return VFDI_RC_EINVAL;
+ }
+
+ flags = 0;
+ if (req->u.mac_filter.flags & VFDI_MAC_FILTER_FLAG_RSS)
+ flags |= EFX_FILTER_FLAG_RX_RSS;
+ if (req->u.mac_filter.flags & VFDI_MAC_FILTER_FLAG_SCATTER)
+ flags |= EFX_FILTER_FLAG_RX_SCATTER;
+ vf->rx_filter_flags = flags;
+ vf->rx_filter_qid = vf_rxq;
+ vf->rx_filtering = true;
+
+ efx_sriov_reset_rx_filter(vf);
+ queue_work(vfdi_workqueue, &efx->peer_work);
+
+ return VFDI_RC_SUCCESS;
+}
+
+static int efx_vfdi_remove_all_filters(struct efx_vf *vf)
+{
+ vf->rx_filtering = false;
+ efx_sriov_reset_rx_filter(vf);
+ queue_work(vfdi_workqueue, &vf->efx->peer_work);
+
+ return VFDI_RC_SUCCESS;
+}
+
+static int efx_vfdi_set_status_page(struct efx_vf *vf)
+{
+ struct efx_nic *efx = vf->efx;
+ struct vfdi_req *req = vf->buf.addr;
+ unsigned int page_count;
+
+ page_count = req->u.set_status_page.peer_page_count;
+ if (!req->u.set_status_page.dma_addr || EFX_PAGE_SIZE <
+ offsetof(struct vfdi_req,
+ u.set_status_page.peer_page_addr[page_count])) {
+ if (net_ratelimit())
+ netif_err(efx, hw, efx->net_dev,
+ "ERROR: Invalid SET_STATUS_PAGE from %s\n",
+ vf->pci_name);
+ return VFDI_RC_EINVAL;
+ }
+
+ mutex_lock(&efx->local_lock);
+ mutex_lock(&vf->status_lock);
+ vf->status_addr = req->u.set_status_page.dma_addr;
+
+ kfree(vf->peer_page_addrs);
+ vf->peer_page_addrs = NULL;
+ vf->peer_page_count = 0;
+
+ if (page_count) {
+ vf->peer_page_addrs = kcalloc(page_count, sizeof(u64),
+ GFP_KERNEL);
+ if (vf->peer_page_addrs) {
+ memcpy(vf->peer_page_addrs,
+ req->u.set_status_page.peer_page_addr,
+ page_count * sizeof(u64));
+ vf->peer_page_count = page_count;
+ }
+ }
+
+ __efx_sriov_push_vf_status(vf);
+ mutex_unlock(&vf->status_lock);
+ mutex_unlock(&efx->local_lock);
+
+ return VFDI_RC_SUCCESS;
+}
+
+static int efx_vfdi_clear_status_page(struct efx_vf *vf)
+{
+ mutex_lock(&vf->status_lock);
+ vf->status_addr = 0;
+ mutex_unlock(&vf->status_lock);
+
+ return VFDI_RC_SUCCESS;
+}
+
+typedef int (*efx_vfdi_op_t)(struct efx_vf *vf);
+
+static const efx_vfdi_op_t vfdi_ops[VFDI_OP_LIMIT] = {
+ [VFDI_OP_INIT_EVQ] = efx_vfdi_init_evq,
+ [VFDI_OP_INIT_TXQ] = efx_vfdi_init_txq,
+ [VFDI_OP_INIT_RXQ] = efx_vfdi_init_rxq,
+ [VFDI_OP_FINI_ALL_QUEUES] = efx_vfdi_fini_all_queues,
+ [VFDI_OP_INSERT_FILTER] = efx_vfdi_insert_filter,
+ [VFDI_OP_REMOVE_ALL_FILTERS] = efx_vfdi_remove_all_filters,
+ [VFDI_OP_SET_STATUS_PAGE] = efx_vfdi_set_status_page,
+ [VFDI_OP_CLEAR_STATUS_PAGE] = efx_vfdi_clear_status_page,
+};
+
+static void efx_sriov_vfdi(struct work_struct *work)
+{
+ struct efx_vf *vf = container_of(work, struct efx_vf, req);
+ struct efx_nic *efx = vf->efx;
+ struct vfdi_req *req = vf->buf.addr;
+ struct efx_memcpy_req copy[2];
+ int rc;
+
+ /* Copy this page into the local address space */
+ memset(copy, '\0', sizeof(copy));
+ copy[0].from_rid = vf->pci_rid;
+ copy[0].from_addr = vf->req_addr;
+ copy[0].to_rid = efx->pci_dev->devfn;
+ copy[0].to_addr = vf->buf.dma_addr;
+ copy[0].length = EFX_PAGE_SIZE;
+ rc = efx_sriov_memcpy(efx, copy, 1);
+ if (rc) {
+ /* If we can't get the request, we can't reply to the caller */
+ if (net_ratelimit())
+ netif_err(efx, hw, efx->net_dev,
+ "ERROR: Unable to fetch VFDI request from %s rc %d\n",
+ vf->pci_name, -rc);
+ vf->busy = false;
+ return;
+ }
+
+ if (req->op < VFDI_OP_LIMIT && vfdi_ops[req->op] != NULL) {
+ rc = vfdi_ops[req->op](vf);
+ if (rc == 0) {
+ netif_dbg(efx, hw, efx->net_dev,
+ "vfdi request %d from %s ok\n",
+ req->op, vf->pci_name);
+ }
+ } else {
+ netif_dbg(efx, hw, efx->net_dev,
+ "ERROR: Unrecognised request %d from VF %s addr "
+ "%llx\n", req->op, vf->pci_name,
+ (unsigned long long)vf->req_addr);
+ rc = VFDI_RC_EOPNOTSUPP;
+ }
+
+ /* Allow subsequent VF requests */
+ vf->busy = false;
+ smp_wmb();
+
+ /* Respond to the request */
+ req->rc = rc;
+ req->op = VFDI_OP_RESPONSE;
+
+ memset(copy, '\0', sizeof(copy));
+ copy[0].from_buf = &req->rc;
+ copy[0].to_rid = vf->pci_rid;
+ copy[0].to_addr = vf->req_addr + offsetof(struct vfdi_req, rc);
+ copy[0].length = sizeof(req->rc);
+ copy[1].from_buf = &req->op;
+ copy[1].to_rid = vf->pci_rid;
+ copy[1].to_addr = vf->req_addr + offsetof(struct vfdi_req, op);
+ copy[1].length = sizeof(req->op);
+
+ (void) efx_sriov_memcpy(efx, copy, ARRAY_SIZE(copy));
+}
+
+
+
+/* After a reset the event queues inside the guests no longer exist. Fill the
+ * event ring in guest memory with VFDI reset events, then (re-initialise) the
+ * event queue to raise an interrupt. The guest driver will then recover.
+ */
+static void efx_sriov_reset_vf(struct efx_vf *vf, struct efx_buffer *buffer)
+{
+ struct efx_nic *efx = vf->efx;
+ struct efx_memcpy_req copy_req[4];
+ efx_qword_t event;
+ unsigned int pos, count, k, buftbl, abs_evq;
+ efx_oword_t reg;
+ efx_dword_t ptr;
+ int rc;
+
+ BUG_ON(buffer->len != EFX_PAGE_SIZE);
+
+ if (!vf->evq0_count)
+ return;
+ BUG_ON(vf->evq0_count & (vf->evq0_count - 1));
+
+ mutex_lock(&vf->status_lock);
+ EFX_POPULATE_QWORD_3(event,
+ FSF_AZ_EV_CODE, FSE_CZ_EV_CODE_USER_EV,
+ VFDI_EV_SEQ, vf->msg_seqno,
+ VFDI_EV_TYPE, VFDI_EV_TYPE_RESET);
+ vf->msg_seqno++;
+ for (pos = 0; pos < EFX_PAGE_SIZE; pos += sizeof(event))
+ memcpy(buffer->addr + pos, &event, sizeof(event));
+
+ for (pos = 0; pos < vf->evq0_count; pos += count) {
+ count = min_t(unsigned, vf->evq0_count - pos,
+ ARRAY_SIZE(copy_req));
+ for (k = 0; k < count; k++) {
+ copy_req[k].from_buf = NULL;
+ copy_req[k].from_rid = efx->pci_dev->devfn;
+ copy_req[k].from_addr = buffer->dma_addr;
+ copy_req[k].to_rid = vf->pci_rid;
+ copy_req[k].to_addr = vf->evq0_addrs[pos + k];
+ copy_req[k].length = EFX_PAGE_SIZE;
+ }
+ rc = efx_sriov_memcpy(efx, copy_req, count);
+ if (rc) {
+ if (net_ratelimit())
+ netif_err(efx, hw, efx->net_dev,
+ "ERROR: Unable to notify %s of reset"
+ ": %d\n", vf->pci_name, -rc);
+ break;
+ }
+ }
+
+ /* Reinitialise, arm and trigger evq0 */
+ abs_evq = abs_index(vf, 0);
+ buftbl = EFX_BUFTBL_EVQ_BASE(vf, 0);
+ efx_sriov_bufs(efx, buftbl, vf->evq0_addrs, vf->evq0_count);
+
+ EFX_POPULATE_OWORD_3(reg,
+ FRF_CZ_TIMER_Q_EN, 1,
+ FRF_CZ_HOST_NOTIFY_MODE, 0,
+ FRF_CZ_TIMER_MODE, FFE_CZ_TIMER_MODE_DIS);
+ efx_writeo_table(efx, &reg, FR_BZ_TIMER_TBL, abs_evq);
+ EFX_POPULATE_OWORD_3(reg,
+ FRF_AZ_EVQ_EN, 1,
+ FRF_AZ_EVQ_SIZE, __ffs(vf->evq0_count),
+ FRF_AZ_EVQ_BUF_BASE_ID, buftbl);
+ efx_writeo_table(efx, &reg, FR_BZ_EVQ_PTR_TBL, abs_evq);
+ EFX_POPULATE_DWORD_1(ptr, FRF_AZ_EVQ_RPTR, 0);
+ efx_writed_table(efx, &ptr, FR_BZ_EVQ_RPTR, abs_evq);
+
+ mutex_unlock(&vf->status_lock);
+}
+
+static void efx_sriov_reset_vf_work(struct work_struct *work)
+{
+ struct efx_vf *vf = container_of(work, struct efx_vf, req);
+ struct efx_nic *efx = vf->efx;
+ struct efx_buffer buf;
+
+ if (!efx_nic_alloc_buffer(efx, &buf, EFX_PAGE_SIZE)) {
+ efx_sriov_reset_vf(vf, &buf);
+ efx_nic_free_buffer(efx, &buf);
+ }
+}
+
+static void efx_sriov_handle_no_channel(struct efx_nic *efx)
+{
+ netif_err(efx, drv, efx->net_dev,
+ "ERROR: IOV requires MSI-X and 1 additional interrupt"
+ "vector. IOV disabled\n");
+ efx->vf_count = 0;
+}
+
+static int efx_sriov_probe_channel(struct efx_channel *channel)
+{
+ channel->efx->vfdi_channel = channel;
+ return 0;
+}
+
+static void
+efx_sriov_get_channel_name(struct efx_channel *channel, char *buf, size_t len)
+{
+ snprintf(buf, len, "%s-iov", channel->efx->name);
+}
+
+static const struct efx_channel_type efx_sriov_channel_type = {
+ .handle_no_channel = efx_sriov_handle_no_channel,
+ .pre_probe = efx_sriov_probe_channel,
+ .get_name = efx_sriov_get_channel_name,
+ /* no copy operation; channel must not be reallocated */
+ .keep_eventq = true,
+};
+
+void efx_sriov_probe(struct efx_nic *efx)
+{
+ unsigned count;
+
+ if (!max_vfs)
+ return;
+
+ if (efx_sriov_cmd(efx, false, &efx->vi_scale, &count))
+ return;
+ if (count > 0 && count > max_vfs)
+ count = max_vfs;
+
+ /* efx_nic_dimension_resources() will reduce vf_count as appopriate */
+ efx->vf_count = count;
+
+ efx->extra_channel_type[EFX_EXTRA_CHANNEL_IOV] = &efx_sriov_channel_type;
+}
+
+/* Copy the list of individual addresses into the vfdi_status.peers
+ * array and auxillary pages, protected by %local_lock. Drop that lock
+ * and then broadcast the address list to every VF.
+ */
+static void efx_sriov_peer_work(struct work_struct *data)
+{
+ struct efx_nic *efx = container_of(data, struct efx_nic, peer_work);
+ struct vfdi_status *vfdi_status = efx->vfdi_status.addr;
+ struct efx_vf *vf;
+ struct efx_local_addr *local_addr;
+ struct vfdi_endpoint *peer;
+ struct efx_endpoint_page *epp;
+ struct list_head pages;
+ unsigned int peer_space;
+ unsigned int peer_count;
+ unsigned int pos;
+
+ mutex_lock(&efx->local_lock);
+
+ /* Move the existing peer pages off %local_page_list */
+ INIT_LIST_HEAD(&pages);
+ list_splice_tail_init(&efx->local_page_list, &pages);
+
+ /* Populate the VF addresses starting from entry 1 (entry 0 is
+ * the PF address)
+ */
+ peer = vfdi_status->peers + 1;
+ peer_space = ARRAY_SIZE(vfdi_status->peers) - 1;
+ peer_count = 1;
+ for (pos = 0; pos < efx->vf_count; ++pos) {
+ vf = efx->vf + pos;
+
+ mutex_lock(&vf->status_lock);
+ if (vf->rx_filtering && !is_zero_ether_addr(vf->addr.mac_addr)) {
+ *peer++ = vf->addr;
+ ++peer_count;
+ --peer_space;
+ BUG_ON(peer_space == 0);
+ }
+ mutex_unlock(&vf->status_lock);
+ }
+
+ /* Fill the remaining addresses */
+ list_for_each_entry(local_addr, &efx->local_addr_list, link) {
+ memcpy(peer->mac_addr, local_addr->addr, ETH_ALEN);
+ peer->tci = 0;
+ ++peer;
+ ++peer_count;
+ if (--peer_space == 0) {
+ if (list_empty(&pages)) {
+ epp = kmalloc(sizeof(*epp), GFP_KERNEL);
+ if (!epp)
+ break;
+ epp->ptr = dma_alloc_coherent(
+ &efx->pci_dev->dev, EFX_PAGE_SIZE,
+ &epp->addr, GFP_KERNEL);
+ if (!epp->ptr) {
+ kfree(epp);
+ break;
+ }
+ } else {
+ epp = list_first_entry(
+ &pages, struct efx_endpoint_page, link);
+ list_del(&epp->link);
+ }
+
+ list_add_tail(&epp->link, &efx->local_page_list);
+ peer = (struct vfdi_endpoint *)epp->ptr;
+ peer_space = EFX_PAGE_SIZE / sizeof(struct vfdi_endpoint);
+ }
+ }
+ vfdi_status->peer_count = peer_count;
+ mutex_unlock(&efx->local_lock);
+
+ /* Free any now unused endpoint pages */
+ while (!list_empty(&pages)) {
+ epp = list_first_entry(
+ &pages, struct efx_endpoint_page, link);
+ list_del(&epp->link);
+ dma_free_coherent(&efx->pci_dev->dev, EFX_PAGE_SIZE,
+ epp->ptr, epp->addr);
+ kfree(epp);
+ }
+
+ /* Finally, push the pages */
+ for (pos = 0; pos < efx->vf_count; ++pos) {
+ vf = efx->vf + pos;
+
+ mutex_lock(&vf->status_lock);
+ if (vf->status_addr)
+ __efx_sriov_push_vf_status(vf);
+ mutex_unlock(&vf->status_lock);
+ }
+}
+
+static void efx_sriov_free_local(struct efx_nic *efx)
+{
+ struct efx_local_addr *local_addr;
+ struct efx_endpoint_page *epp;
+
+ while (!list_empty(&efx->local_addr_list)) {
+ local_addr = list_first_entry(&efx->local_addr_list,
+ struct efx_local_addr, link);
+ list_del(&local_addr->link);
+ kfree(local_addr);
+ }
+
+ while (!list_empty(&efx->local_page_list)) {
+ epp = list_first_entry(&efx->local_page_list,
+ struct efx_endpoint_page, link);
+ list_del(&epp->link);
+ dma_free_coherent(&efx->pci_dev->dev, EFX_PAGE_SIZE,
+ epp->ptr, epp->addr);
+ kfree(epp);
+ }
+}
+
+static int efx_sriov_vf_alloc(struct efx_nic *efx)
+{
+ unsigned index;
+ struct efx_vf *vf;
+
+ efx->vf = kzalloc(sizeof(struct efx_vf) * efx->vf_count, GFP_KERNEL);
+ if (!efx->vf)
+ return -ENOMEM;
+
+ for (index = 0; index < efx->vf_count; ++index) {
+ vf = efx->vf + index;
+
+ vf->efx = efx;
+ vf->index = index;
+ vf->rx_filter_id = -1;
+ vf->tx_filter_mode = VF_TX_FILTER_AUTO;
+ vf->tx_filter_id = -1;
+ INIT_WORK(&vf->req, efx_sriov_vfdi);
+ INIT_WORK(&vf->reset_work, efx_sriov_reset_vf_work);
+ init_waitqueue_head(&vf->flush_waitq);
+ mutex_init(&vf->status_lock);
+ mutex_init(&vf->txq_lock);
+ }
+
+ return 0;
+}
+
+static void efx_sriov_vfs_fini(struct efx_nic *efx)
+{
+ struct efx_vf *vf;
+ unsigned int pos;
+
+ for (pos = 0; pos < efx->vf_count; ++pos) {
+ vf = efx->vf + pos;
+
+ efx_nic_free_buffer(efx, &vf->buf);
+ kfree(vf->peer_page_addrs);
+ vf->peer_page_addrs = NULL;
+ vf->peer_page_count = 0;
+
+ vf->evq0_count = 0;
+ }
+}
+
+static int efx_sriov_vfs_init(struct efx_nic *efx)
+{
+ struct pci_dev *pci_dev = efx->pci_dev;
+ unsigned index, devfn, sriov, buftbl_base;
+ u16 offset, stride;
+ struct efx_vf *vf;
+ int rc;
+
+ sriov = pci_find_ext_capability(pci_dev, PCI_EXT_CAP_ID_SRIOV);
+ if (!sriov)
+ return -ENOENT;
+
+ pci_read_config_word(pci_dev, sriov + PCI_SRIOV_VF_OFFSET, &offset);
+ pci_read_config_word(pci_dev, sriov + PCI_SRIOV_VF_STRIDE, &stride);
+
+ buftbl_base = efx->vf_buftbl_base;
+ devfn = pci_dev->devfn + offset;
+ for (index = 0; index < efx->vf_count; ++index) {
+ vf = efx->vf + index;
+
+ /* Reserve buffer entries */
+ vf->buftbl_base = buftbl_base;
+ buftbl_base += EFX_VF_BUFTBL_PER_VI * efx_vf_size(efx);
+
+ vf->pci_rid = devfn;
+ snprintf(vf->pci_name, sizeof(vf->pci_name),
+ "%04x:%02x:%02x.%d",
+ pci_domain_nr(pci_dev->bus), pci_dev->bus->number,
+ PCI_SLOT(devfn), PCI_FUNC(devfn));
+
+ rc = efx_nic_alloc_buffer(efx, &vf->buf, EFX_PAGE_SIZE);
+ if (rc)
+ goto fail;
+
+ devfn += stride;
+ }
+
+ return 0;
+
+fail:
+ efx_sriov_vfs_fini(efx);
+ return rc;
+}
+
+int efx_sriov_init(struct efx_nic *efx)
+{
+ struct net_device *net_dev = efx->net_dev;
+ struct vfdi_status *vfdi_status;
+ int rc;
+
+ /* Ensure there's room for vf_channel */
+ BUILD_BUG_ON(EFX_MAX_CHANNELS + 1 >= EFX_VI_BASE);
+ /* Ensure that VI_BASE is aligned on VI_SCALE */
+ BUILD_BUG_ON(EFX_VI_BASE & ((1 << EFX_VI_SCALE_MAX) - 1));
+
+ if (efx->vf_count == 0)
+ return 0;
+
+ rc = efx_sriov_cmd(efx, true, NULL, NULL);
+ if (rc)
+ goto fail_cmd;
+
+ rc = efx_nic_alloc_buffer(efx, &efx->vfdi_status, sizeof(*vfdi_status));
+ if (rc)
+ goto fail_status;
+ vfdi_status = efx->vfdi_status.addr;
+ memset(vfdi_status, 0, sizeof(*vfdi_status));
+ vfdi_status->version = 1;
+ vfdi_status->length = sizeof(*vfdi_status);
+ vfdi_status->max_tx_channels = vf_max_tx_channels;
+ vfdi_status->vi_scale = efx->vi_scale;
+ vfdi_status->rss_rxq_count = efx->rss_spread;
+ vfdi_status->peer_count = 1 + efx->vf_count;
+ vfdi_status->timer_quantum_ns = efx->timer_quantum_ns;
+
+ rc = efx_sriov_vf_alloc(efx);
+ if (rc)
+ goto fail_alloc;
+
+ mutex_init(&efx->local_lock);
+ INIT_WORK(&efx->peer_work, efx_sriov_peer_work);
+ INIT_LIST_HEAD(&efx->local_addr_list);
+ INIT_LIST_HEAD(&efx->local_page_list);
+
+ rc = efx_sriov_vfs_init(efx);
+ if (rc)
+ goto fail_vfs;
+
+ rtnl_lock();
+ memcpy(vfdi_status->peers[0].mac_addr,
+ net_dev->dev_addr, ETH_ALEN);
+ efx->vf_init_count = efx->vf_count;
+ rtnl_unlock();
+
+ efx_sriov_usrev(efx, true);
+
+ /* At this point we must be ready to accept VFDI requests */
+
+ rc = pci_enable_sriov(efx->pci_dev, efx->vf_count);
+ if (rc)
+ goto fail_pci;
+
+ netif_info(efx, probe, net_dev,
+ "enabled SR-IOV for %d VFs, %d VI per VF\n",
+ efx->vf_count, efx_vf_size(efx));
+ return 0;
+
+fail_pci:
+ efx_sriov_usrev(efx, false);
+ rtnl_lock();
+ efx->vf_init_count = 0;
+ rtnl_unlock();
+ efx_sriov_vfs_fini(efx);
+fail_vfs:
+ cancel_work_sync(&efx->peer_work);
+ efx_sriov_free_local(efx);
+ kfree(efx->vf);
+fail_alloc:
+ efx_nic_free_buffer(efx, &efx->vfdi_status);
+fail_status:
+ efx_sriov_cmd(efx, false, NULL, NULL);
+fail_cmd:
+ return rc;
+}
+
+void efx_sriov_fini(struct efx_nic *efx)
+{
+ struct efx_vf *vf;
+ unsigned int pos;
+
+ if (efx->vf_init_count == 0)
+ return;
+
+ /* Disable all interfaces to reconfiguration */
+ BUG_ON(efx->vfdi_channel->enabled);
+ efx_sriov_usrev(efx, false);
+ rtnl_lock();
+ efx->vf_init_count = 0;
+ rtnl_unlock();
+
+ /* Flush all reconfiguration work */
+ for (pos = 0; pos < efx->vf_count; ++pos) {
+ vf = efx->vf + pos;
+ cancel_work_sync(&vf->req);
+ cancel_work_sync(&vf->reset_work);
+ }
+ cancel_work_sync(&efx->peer_work);
+
+ pci_disable_sriov(efx->pci_dev);
+
+ /* Tear down back-end state */
+ efx_sriov_vfs_fini(efx);
+ efx_sriov_free_local(efx);
+ kfree(efx->vf);
+ efx_nic_free_buffer(efx, &efx->vfdi_status);
+ efx_sriov_cmd(efx, false, NULL, NULL);
+}
+
+void efx_sriov_event(struct efx_channel *channel, efx_qword_t *event)
+{
+ struct efx_nic *efx = channel->efx;
+ struct efx_vf *vf;
+ unsigned qid, seq, type, data;
+
+ qid = EFX_QWORD_FIELD(*event, FSF_CZ_USER_QID);
+
+ /* USR_EV_REG_VALUE is dword0, so access the VFDI_EV fields directly */
+ BUILD_BUG_ON(FSF_CZ_USER_EV_REG_VALUE_LBN != 0);
+ seq = EFX_QWORD_FIELD(*event, VFDI_EV_SEQ);
+ type = EFX_QWORD_FIELD(*event, VFDI_EV_TYPE);
+ data = EFX_QWORD_FIELD(*event, VFDI_EV_DATA);
+
+ netif_vdbg(efx, hw, efx->net_dev,
+ "USR_EV event from qid %d seq 0x%x type %d data 0x%x\n",
+ qid, seq, type, data);
+
+ if (map_vi_index(efx, qid, &vf, NULL))
+ return;
+ if (vf->busy)
+ goto error;
+
+ if (type == VFDI_EV_TYPE_REQ_WORD0) {
+ /* Resynchronise */
+ vf->req_type = VFDI_EV_TYPE_REQ_WORD0;
+ vf->req_seqno = seq + 1;
+ vf->req_addr = 0;
+ } else if (seq != (vf->req_seqno++ & 0xff) || type != vf->req_type)
+ goto error;
+
+ switch (vf->req_type) {
+ case VFDI_EV_TYPE_REQ_WORD0:
+ case VFDI_EV_TYPE_REQ_WORD1:
+ case VFDI_EV_TYPE_REQ_WORD2:
+ vf->req_addr |= (u64)data << (vf->req_type << 4);
+ ++vf->req_type;
+ return;
+
+ case VFDI_EV_TYPE_REQ_WORD3:
+ vf->req_addr |= (u64)data << 48;
+ vf->req_type = VFDI_EV_TYPE_REQ_WORD0;
+ vf->busy = true;
+ queue_work(vfdi_workqueue, &vf->req);
+ return;
+ }
+
+error:
+ if (net_ratelimit())
+ netif_err(efx, hw, efx->net_dev,
+ "ERROR: Screaming VFDI request from %s\n",
+ vf->pci_name);
+ /* Reset the request and sequence number */
+ vf->req_type = VFDI_EV_TYPE_REQ_WORD0;
+ vf->req_seqno = seq + 1;
+}
+
+void efx_sriov_flr(struct efx_nic *efx, unsigned vf_i)
+{
+ struct efx_vf *vf;
+
+ if (vf_i > efx->vf_init_count)
+ return;
+ vf = efx->vf + vf_i;
+ netif_info(efx, hw, efx->net_dev,
+ "FLR on VF %s\n", vf->pci_name);
+
+ vf->status_addr = 0;
+ efx_vfdi_remove_all_filters(vf);
+ efx_vfdi_flush_clear(vf);
+
+ vf->evq0_count = 0;
+}
+
+void efx_sriov_mac_address_changed(struct efx_nic *efx)
+{
+ struct vfdi_status *vfdi_status = efx->vfdi_status.addr;
+
+ if (!efx->vf_init_count)
+ return;
+ memcpy(vfdi_status->peers[0].mac_addr,
+ efx->net_dev->dev_addr, ETH_ALEN);
+ queue_work(vfdi_workqueue, &efx->peer_work);
+}
+
+void efx_sriov_tx_flush_done(struct efx_nic *efx, efx_qword_t *event)
+{
+ struct efx_vf *vf;
+ unsigned queue, qid;
+
+ queue = EFX_QWORD_FIELD(*event, FSF_AZ_DRIVER_EV_SUBDATA);
+ if (map_vi_index(efx, queue, &vf, &qid))
+ return;
+ /* Ignore flush completions triggered by an FLR */
+ if (!test_bit(qid, vf->txq_mask))
+ return;
+
+ __clear_bit(qid, vf->txq_mask);
+ --vf->txq_count;
+
+ if (efx_vfdi_flush_wake(vf))
+ wake_up(&vf->flush_waitq);
+}
+
+void efx_sriov_rx_flush_done(struct efx_nic *efx, efx_qword_t *event)
+{
+ struct efx_vf *vf;
+ unsigned ev_failed, queue, qid;
+
+ queue = EFX_QWORD_FIELD(*event, FSF_AZ_DRIVER_EV_RX_DESCQ_ID);
+ ev_failed = EFX_QWORD_FIELD(*event,
+ FSF_AZ_DRIVER_EV_RX_FLUSH_FAIL);
+ if (map_vi_index(efx, queue, &vf, &qid))
+ return;
+ if (!test_bit(qid, vf->rxq_mask))
+ return;
+
+ if (ev_failed) {
+ set_bit(qid, vf->rxq_retry_mask);
+ atomic_inc(&vf->rxq_retry_count);
+ } else {
+ __clear_bit(qid, vf->rxq_mask);
+ --vf->rxq_count;
+ }
+ if (efx_vfdi_flush_wake(vf))
+ wake_up(&vf->flush_waitq);
+}
+
+/* Called from napi. Schedule the reset work item */
+void efx_sriov_desc_fetch_err(struct efx_nic *efx, unsigned dmaq)
+{
+ struct efx_vf *vf;
+ unsigned int rel;
+
+ if (map_vi_index(efx, dmaq, &vf, &rel))
+ return;
+
+ if (net_ratelimit())
+ netif_err(efx, hw, efx->net_dev,
+ "VF %d DMA Q %d reports descriptor fetch error.\n",
+ vf->index, rel);
+ queue_work(vfdi_workqueue, &vf->reset_work);
+}
+
+/* Reset all VFs */
+void efx_sriov_reset(struct efx_nic *efx)
+{
+ unsigned int vf_i;
+ struct efx_buffer buf;
+ struct efx_vf *vf;
+
+ ASSERT_RTNL();
+
+ if (efx->vf_init_count == 0)
+ return;
+
+ efx_sriov_usrev(efx, true);
+ (void)efx_sriov_cmd(efx, true, NULL, NULL);
+
+ if (efx_nic_alloc_buffer(efx, &buf, EFX_PAGE_SIZE))
+ return;
+
+ for (vf_i = 0; vf_i < efx->vf_init_count; ++vf_i) {
+ vf = efx->vf + vf_i;
+ efx_sriov_reset_vf(vf, &buf);
+ }
+
+ efx_nic_free_buffer(efx, &buf);
+}
+
+int efx_init_sriov(void)
+{
+ /* A single threaded workqueue is sufficient. efx_sriov_vfdi() and
+ * efx_sriov_peer_work() spend almost all their time sleeping for
+ * MCDI to complete anyway
+ */
+ vfdi_workqueue = create_singlethread_workqueue("sfc_vfdi");
+ if (!vfdi_workqueue)
+ return -ENOMEM;
+
+ return 0;
+}
+
+void efx_fini_sriov(void)
+{
+ destroy_workqueue(vfdi_workqueue);
+}
+
+int efx_sriov_set_vf_mac(struct net_device *net_dev, int vf_i, u8 *mac)
+{
+ struct efx_nic *efx = netdev_priv(net_dev);
+ struct efx_vf *vf;
+
+ if (vf_i >= efx->vf_init_count)
+ return -EINVAL;
+ vf = efx->vf + vf_i;
+
+ mutex_lock(&vf->status_lock);
+ memcpy(vf->addr.mac_addr, mac, ETH_ALEN);
+ __efx_sriov_update_vf_addr(vf);
+ mutex_unlock(&vf->status_lock);
+
+ return 0;
+}
+
+int efx_sriov_set_vf_vlan(struct net_device *net_dev, int vf_i,
+ u16 vlan, u8 qos)
+{
+ struct efx_nic *efx = netdev_priv(net_dev);
+ struct efx_vf *vf;
+ u16 tci;
+
+ if (vf_i >= efx->vf_init_count)
+ return -EINVAL;
+ vf = efx->vf + vf_i;
+
+ mutex_lock(&vf->status_lock);
+ tci = (vlan & VLAN_VID_MASK) | ((qos & 0x7) << VLAN_PRIO_SHIFT);
+ vf->addr.tci = htons(tci);
+ __efx_sriov_update_vf_addr(vf);
+ mutex_unlock(&vf->status_lock);
+
+ return 0;
+}
+
+int efx_sriov_set_vf_spoofchk(struct net_device *net_dev, int vf_i,
+ bool spoofchk)
+{
+ struct efx_nic *efx = netdev_priv(net_dev);
+ struct efx_vf *vf;
+ int rc;
+
+ if (vf_i >= efx->vf_init_count)
+ return -EINVAL;
+ vf = efx->vf + vf_i;
+
+ mutex_lock(&vf->txq_lock);
+ if (vf->txq_count == 0) {
+ vf->tx_filter_mode =
+ spoofchk ? VF_TX_FILTER_ON : VF_TX_FILTER_OFF;
+ rc = 0;
+ } else {
+ /* This cannot be changed while TX queues are running */
+ rc = -EBUSY;
+ }
+ mutex_unlock(&vf->txq_lock);
+ return rc;
+}
+
+int efx_sriov_get_vf_config(struct net_device *net_dev, int vf_i,
+ struct ifla_vf_info *ivi)
+{
+ struct efx_nic *efx = netdev_priv(net_dev);
+ struct efx_vf *vf;
+ u16 tci;
+
+ if (vf_i >= efx->vf_init_count)
+ return -EINVAL;
+ vf = efx->vf + vf_i;
+
+ ivi->vf = vf_i;
+ memcpy(ivi->mac, vf->addr.mac_addr, ETH_ALEN);
+ ivi->tx_rate = 0;
+ tci = ntohs(vf->addr.tci);
+ ivi->vlan = tci & VLAN_VID_MASK;
+ ivi->qos = (tci >> VLAN_PRIO_SHIFT) & 0x7;
+ ivi->spoofchk = vf->tx_filter_mode == VF_TX_FILTER_ON;
+
+ return 0;
+}
+
diff --git a/drivers/net/ethernet/sfc/vfdi.h b/drivers/net/ethernet/sfc/vfdi.h
new file mode 100644
index 000000000000..656fa70f9993
--- /dev/null
+++ b/drivers/net/ethernet/sfc/vfdi.h
@@ -0,0 +1,254 @@
+/****************************************************************************
+ * Driver for Solarflare Solarstorm network controllers and boards
+ * Copyright 2010-2012 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.
+ */
+#ifndef _VFDI_H
+#define _VFDI_H
+
+/**
+ * DOC: Virtual Function Driver Interface
+ *
+ * This file contains software structures used to form a two way
+ * communication channel between the VF driver and the PF driver,
+ * named Virtual Function Driver Interface (VFDI).
+ *
+ * For the purposes of VFDI, a page is a memory region with size and
+ * alignment of 4K. All addresses are DMA addresses to be used within
+ * the domain of the relevant VF.
+ *
+ * The only hardware-defined channels for a VF driver to communicate
+ * with the PF driver are the event mailboxes (%FR_CZ_USR_EV
+ * registers). Writing to these registers generates an event with
+ * EV_CODE = EV_CODE_USR_EV, USER_QID set to the index of the mailbox
+ * and USER_EV_REG_VALUE set to the value written. The PF driver may
+ * direct or disable delivery of these events by setting
+ * %FR_CZ_USR_EV_CFG.
+ *
+ * The PF driver can send arbitrary events to arbitrary event queues.
+ * However, for consistency, VFDI events from the PF are defined to
+ * follow the same form and be sent to the first event queue assigned
+ * to the VF while that queue is enabled by the VF driver.
+ *
+ * The general form of the variable bits of VFDI events is:
+ *
+ * 0 16 24 31
+ * | DATA | TYPE | SEQ |
+ *
+ * SEQ is a sequence number which should be incremented by 1 (modulo
+ * 256) for each event. The sequence numbers used in each direction
+ * are independent.
+ *
+ * The VF submits requests of type &struct vfdi_req by sending the
+ * address of the request (ADDR) in a series of 4 events:
+ *
+ * 0 16 24 31
+ * | ADDR[0:15] | VFDI_EV_TYPE_REQ_WORD0 | SEQ |
+ * | ADDR[16:31] | VFDI_EV_TYPE_REQ_WORD1 | SEQ+1 |
+ * | ADDR[32:47] | VFDI_EV_TYPE_REQ_WORD2 | SEQ+2 |
+ * | ADDR[48:63] | VFDI_EV_TYPE_REQ_WORD3 | SEQ+3 |
+ *
+ * The address must be page-aligned. After receiving such a valid
+ * series of events, the PF driver will attempt to read the request
+ * and write a response to the same address. In case of an invalid
+ * sequence of events or a DMA error, there will be no response.
+ *
+ * The VF driver may request that the PF driver writes status
+ * information into its domain asynchronously. After writing the
+ * status, the PF driver will send an event of the form:
+ *
+ * 0 16 24 31
+ * | reserved | VFDI_EV_TYPE_STATUS | SEQ |
+ *
+ * In case the VF must be reset for any reason, the PF driver will
+ * send an event of the form:
+ *
+ * 0 16 24 31
+ * | reserved | VFDI_EV_TYPE_RESET | SEQ |
+ *
+ * It is then the responsibility of the VF driver to request
+ * reinitialisation of its queues.
+ */
+#define VFDI_EV_SEQ_LBN 24
+#define VFDI_EV_SEQ_WIDTH 8
+#define VFDI_EV_TYPE_LBN 16
+#define VFDI_EV_TYPE_WIDTH 8
+#define VFDI_EV_TYPE_REQ_WORD0 0
+#define VFDI_EV_TYPE_REQ_WORD1 1
+#define VFDI_EV_TYPE_REQ_WORD2 2
+#define VFDI_EV_TYPE_REQ_WORD3 3
+#define VFDI_EV_TYPE_STATUS 4
+#define VFDI_EV_TYPE_RESET 5
+#define VFDI_EV_DATA_LBN 0
+#define VFDI_EV_DATA_WIDTH 16
+
+struct vfdi_endpoint {
+ u8 mac_addr[ETH_ALEN];
+ __be16 tci;
+};
+
+/**
+ * enum vfdi_op - VFDI operation enumeration
+ * @VFDI_OP_RESPONSE: Indicates a response to the request.
+ * @VFDI_OP_INIT_EVQ: Initialize SRAM entries and initialize an EVQ.
+ * @VFDI_OP_INIT_RXQ: Initialize SRAM entries and initialize an RXQ.
+ * @VFDI_OP_INIT_TXQ: Initialize SRAM entries and initialize a TXQ.
+ * @VFDI_OP_FINI_ALL_QUEUES: Flush all queues, finalize all queues, then
+ * finalize the SRAM entries.
+ * @VFDI_OP_INSERT_FILTER: Insert a MAC filter targetting the given RXQ.
+ * @VFDI_OP_REMOVE_ALL_FILTERS: Remove all filters.
+ * @VFDI_OP_SET_STATUS_PAGE: Set the DMA page(s) used for status updates
+ * from PF and write the initial status.
+ * @VFDI_OP_CLEAR_STATUS_PAGE: Clear the DMA page(s) used for status
+ * updates from PF.
+ */
+enum vfdi_op {
+ VFDI_OP_RESPONSE = 0,
+ VFDI_OP_INIT_EVQ = 1,
+ VFDI_OP_INIT_RXQ = 2,
+ VFDI_OP_INIT_TXQ = 3,
+ VFDI_OP_FINI_ALL_QUEUES = 4,
+ VFDI_OP_INSERT_FILTER = 5,
+ VFDI_OP_REMOVE_ALL_FILTERS = 6,
+ VFDI_OP_SET_STATUS_PAGE = 7,
+ VFDI_OP_CLEAR_STATUS_PAGE = 8,
+ VFDI_OP_LIMIT,
+};
+
+/* Response codes for VFDI operations. Other values may be used in future. */
+#define VFDI_RC_SUCCESS 0
+#define VFDI_RC_ENOMEM (-12)
+#define VFDI_RC_EINVAL (-22)
+#define VFDI_RC_EOPNOTSUPP (-95)
+#define VFDI_RC_ETIMEDOUT (-110)
+
+/**
+ * struct vfdi_req - Request from VF driver to PF driver
+ * @op: Operation code or response indicator, taken from &enum vfdi_op.
+ * @rc: Response code. Set to 0 on success or a negative error code on failure.
+ * @u.init_evq.index: Index of event queue to create.
+ * @u.init_evq.buf_count: Number of 4k buffers backing event queue.
+ * @u.init_evq.addr: Array of length %u.init_evq.buf_count containing DMA
+ * address of each page backing the event queue.
+ * @u.init_rxq.index: Index of receive queue to create.
+ * @u.init_rxq.buf_count: Number of 4k buffers backing receive queue.
+ * @u.init_rxq.evq: Instance of event queue to target receive events at.
+ * @u.init_rxq.label: Label used in receive events.
+ * @u.init_rxq.flags: Unused.
+ * @u.init_rxq.addr: Array of length %u.init_rxq.buf_count containing DMA
+ * address of each page backing the receive queue.
+ * @u.init_txq.index: Index of transmit queue to create.
+ * @u.init_txq.buf_count: Number of 4k buffers backing transmit queue.
+ * @u.init_txq.evq: Instance of event queue to target transmit completion
+ * events at.
+ * @u.init_txq.label: Label used in transmit completion events.
+ * @u.init_txq.flags: Checksum offload flags.
+ * @u.init_txq.addr: Array of length %u.init_txq.buf_count containing DMA
+ * address of each page backing the transmit queue.
+ * @u.mac_filter.rxq: Insert MAC filter at VF local address/VLAN targetting
+ * all traffic at this receive queue.
+ * @u.mac_filter.flags: MAC filter flags.
+ * @u.set_status_page.dma_addr: Base address for the &struct vfdi_status.
+ * This address must be such that the structure fits within a page.
+ * @u.set_status_page.peer_page_count: Number of additional pages the VF
+ * has provided into which peer addresses may be DMAd.
+ * @u.set_status_page.peer_page_addr: Array of DMA addresses of pages.
+ * If the number of peers exceeds 256, then the VF must provide
+ * additional pages in this array. The PF will then DMA up to
+ * 512 vfdi_endpoint structures into each page. These addresses
+ * must be page-aligned.
+ */
+struct vfdi_req {
+ u32 op;
+ u32 reserved1;
+ s32 rc;
+ u32 reserved2;
+ union {
+ struct {
+ u32 index;
+ u32 buf_count;
+ u64 addr[];
+ } init_evq;
+ struct {
+ u32 index;
+ u32 buf_count;
+ u32 evq;
+ u32 label;
+ u32 flags;
+#define VFDI_RXQ_FLAG_SCATTER_EN 1
+ u32 reserved;
+ u64 addr[];
+ } init_rxq;
+ struct {
+ u32 index;
+ u32 buf_count;
+ u32 evq;
+ u32 label;
+ u32 flags;
+#define VFDI_TXQ_FLAG_IP_CSUM_DIS 1
+#define VFDI_TXQ_FLAG_TCPUDP_CSUM_DIS 2
+ u32 reserved;
+ u64 addr[];
+ } init_txq;
+ struct {
+ u32 rxq;
+ u32 flags;
+#define VFDI_MAC_FILTER_FLAG_RSS 1
+#define VFDI_MAC_FILTER_FLAG_SCATTER 2
+ } mac_filter;
+ struct {
+ u64 dma_addr;
+ u64 peer_page_count;
+ u64 peer_page_addr[];
+ } set_status_page;
+ } u;
+};
+
+/**
+ * struct vfdi_status - Status provided by PF driver to VF driver
+ * @generation_start: A generation count DMA'd to VF *before* the
+ * rest of the structure.
+ * @generation_end: A generation count DMA'd to VF *after* the
+ * rest of the structure.
+ * @version: Version of this structure; currently set to 1. Later
+ * versions must either be layout-compatible or only be sent to VFs
+ * that specifically request them.
+ * @length: Total length of this structure including embedded tables
+ * @vi_scale: log2 the number of VIs available on this VF. This quantity
+ * is used by the hardware for register decoding.
+ * @max_tx_channels: The maximum number of transmit queues the VF can use.
+ * @rss_rxq_count: The number of receive queues present in the shared RSS
+ * indirection table.
+ * @peer_count: Total number of peers in the complete peer list. If larger
+ * than ARRAY_SIZE(%peers), then the VF must provide sufficient
+ * additional pages each of which is filled with vfdi_endpoint structures.
+ * @local: The MAC address and outer VLAN tag of *this* VF
+ * @peers: Table of peer addresses. The @tci fields in these structures
+ * are currently unused and must be ignored. Additional peers are
+ * written into any additional pages provided by the VF.
+ * @timer_quantum_ns: Timer quantum (nominal period between timer ticks)
+ * for interrupt moderation timers, in nanoseconds. This member is only
+ * present if @length is sufficiently large.
+ */
+struct vfdi_status {
+ u32 generation_start;
+ u32 generation_end;
+ u32 version;
+ u32 length;
+ u8 vi_scale;
+ u8 max_tx_channels;
+ u8 rss_rxq_count;
+ u8 reserved1;
+ u16 peer_count;
+ u16 reserved2;
+ struct vfdi_endpoint local;
+ struct vfdi_endpoint peers[256];
+
+ /* Members below here extend version 1 of this structure */
+ u32 timer_quantum_ns;
+};
+
+#endif
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-15 02:01:49 +0300