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sfc: read back RX hash config from the NIC when querying it with ethtool -x

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Ensures that we report the key and indirection table the NIC is using,
 rather than (if setting them failed earlier) what we wanted it to use.

Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Edward Cree 2017-01-17 12:02:12 +00:00 committed by David S. Miller
parent f74d199519
commit a707d18851
6 changed files with 96 additions and 0 deletions
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52
drivers/net/ethernet/sfc/ef10.c
View File

@ -2643,6 +2643,56 @@ fail1:
return rc;
}
static int efx_ef10_rx_pull_rss_config(struct efx_nic *efx)
{
struct efx_ef10_nic_data *nic_data = efx->nic_data;
MCDI_DECLARE_BUF(inbuf, MC_CMD_RSS_CONTEXT_GET_TABLE_IN_LEN);
MCDI_DECLARE_BUF(tablebuf, MC_CMD_RSS_CONTEXT_GET_TABLE_OUT_LEN);
MCDI_DECLARE_BUF(keybuf, MC_CMD_RSS_CONTEXT_GET_KEY_OUT_LEN);
size_t outlen;
int rc, i;
BUILD_BUG_ON(MC_CMD_RSS_CONTEXT_GET_TABLE_IN_LEN !=
MC_CMD_RSS_CONTEXT_GET_KEY_IN_LEN);
if (nic_data->rx_rss_context == EFX_EF10_RSS_CONTEXT_INVALID)
return -ENOENT;
MCDI_SET_DWORD(inbuf, RSS_CONTEXT_GET_TABLE_IN_RSS_CONTEXT_ID,
nic_data->rx_rss_context);
BUILD_BUG_ON(ARRAY_SIZE(efx->rx_indir_table) !=
MC_CMD_RSS_CONTEXT_GET_TABLE_OUT_INDIRECTION_TABLE_LEN);
rc = efx_mcdi_rpc(efx, MC_CMD_RSS_CONTEXT_GET_TABLE, inbuf, sizeof(inbuf),
tablebuf, sizeof(tablebuf), &outlen);
if (rc != 0)
return rc;
if (WARN_ON(outlen != MC_CMD_RSS_CONTEXT_GET_TABLE_OUT_LEN))
return -EIO;
for (i = 0; i < ARRAY_SIZE(efx->rx_indir_table); i++)
efx->rx_indir_table[i] = MCDI_PTR(tablebuf,
RSS_CONTEXT_GET_TABLE_OUT_INDIRECTION_TABLE)[i];
MCDI_SET_DWORD(inbuf, RSS_CONTEXT_GET_KEY_IN_RSS_CONTEXT_ID,
nic_data->rx_rss_context);
BUILD_BUG_ON(ARRAY_SIZE(efx->rx_hash_key) !=
MC_CMD_RSS_CONTEXT_SET_KEY_IN_TOEPLITZ_KEY_LEN);
rc = efx_mcdi_rpc(efx, MC_CMD_RSS_CONTEXT_GET_KEY, inbuf, sizeof(inbuf),
keybuf, sizeof(keybuf), &outlen);
if (rc != 0)
return rc;
if (WARN_ON(outlen != MC_CMD_RSS_CONTEXT_GET_KEY_OUT_LEN))
return -EIO;
for (i = 0; i < ARRAY_SIZE(efx->rx_hash_key); ++i)
efx->rx_hash_key[i] = MCDI_PTR(
keybuf, RSS_CONTEXT_GET_KEY_OUT_TOEPLITZ_KEY)[i];
return 0;
}
static int efx_ef10_pf_rx_push_rss_config(struct efx_nic *efx, bool user,
const u32 *rx_indir_table,
const u8 *key)
@ -5643,6 +5693,7 @@ const struct efx_nic_type efx_hunt_a0_vf_nic_type = {
.tx_write = efx_ef10_tx_write,
.tx_limit_len = efx_ef10_tx_limit_len,
.rx_push_rss_config = efx_ef10_vf_rx_push_rss_config,
.rx_pull_rss_config = efx_ef10_rx_pull_rss_config,
.rx_probe = efx_ef10_rx_probe,
.rx_init = efx_ef10_rx_init,
.rx_remove = efx_ef10_rx_remove,
@ -5751,6 +5802,7 @@ const struct efx_nic_type efx_hunt_a0_nic_type = {
.tx_write = efx_ef10_tx_write,
.tx_limit_len = efx_ef10_tx_limit_len,
.rx_push_rss_config = efx_ef10_pf_rx_push_rss_config,
.rx_pull_rss_config = efx_ef10_rx_pull_rss_config,
.rx_probe = efx_ef10_rx_probe,
.rx_init = efx_ef10_rx_init,
.rx_remove = efx_ef10_rx_remove,

5
drivers/net/ethernet/sfc/ethtool.c
View File

@ -1289,6 +1289,11 @@ static int efx_ethtool_get_rxfh(struct net_device *net_dev, u32 *indir, u8 *key,
u8 *hfunc)
{
struct efx_nic *efx = netdev_priv(net_dev);
int rc;
rc = efx->type->rx_pull_rss_config(efx);
if (rc)
return rc;
if (hfunc)
*hfunc = ETH_RSS_HASH_TOP;

16
drivers/net/ethernet/sfc/farch.c
View File

@ -1649,6 +1649,22 @@ void efx_farch_rx_push_indir_table(struct efx_nic *efx)
}
}
void efx_farch_rx_pull_indir_table(struct efx_nic *efx)
{
size_t i = 0;
efx_dword_t dword;
BUILD_BUG_ON(ARRAY_SIZE(efx->rx_indir_table) !=
FR_BZ_RX_INDIRECTION_TBL_ROWS);
for (i = 0; i < FR_BZ_RX_INDIRECTION_TBL_ROWS; i++) {
efx_readd(efx, &dword,
FR_BZ_RX_INDIRECTION_TBL +
FR_BZ_RX_INDIRECTION_TBL_STEP * i);
efx->rx_indir_table[i] = EFX_DWORD_FIELD(dword, FRF_BZ_IT_QUEUE);
}
}
/* Looks at available SRAM resources and works out how many queues we
* can support, and where things like descriptor caches should live.
*

2
drivers/net/ethernet/sfc/net_driver.h
View File

@ -1181,6 +1181,7 @@ struct efx_mtd_partition {
* @tx_remove: Free resources for TX queue
* @tx_write: Write TX descriptors and doorbell
* @rx_push_rss_config: Write RSS hash key and indirection table to the NIC
* @rx_pull_rss_config: Read RSS hash key and indirection table back from the NIC
* @rx_probe: Allocate resources for RX queue
* @rx_init: Initialise RX queue on the NIC
* @rx_remove: Free resources for RX queue
@ -1312,6 +1313,7 @@ struct efx_nic_type {
dma_addr_t dma_addr, unsigned int len);
int (*rx_push_rss_config)(struct efx_nic *efx, bool user,
const u32 *rx_indir_table, const u8 *key);
int (*rx_pull_rss_config)(struct efx_nic *efx);
int (*rx_probe)(struct efx_rx_queue *rx_queue);
void (*rx_init)(struct efx_rx_queue *rx_queue);
void (*rx_remove)(struct efx_rx_queue *rx_queue);

1
drivers/net/ethernet/sfc/nic.h
View File

@ -626,6 +626,7 @@ void efx_farch_dimension_resources(struct efx_nic *efx, unsigned sram_lim_qw);
void efx_farch_init_common(struct efx_nic *efx);
void efx_ef10_handle_drain_event(struct efx_nic *efx);
void efx_farch_rx_push_indir_table(struct efx_nic *efx);
void efx_farch_rx_pull_indir_table(struct efx_nic *efx);
int efx_nic_alloc_buffer(struct efx_nic *efx, struct efx_buffer *buffer,
unsigned int len, gfp_t gfp_flags);

20
drivers/net/ethernet/sfc/siena.c
View File

@ -332,6 +332,25 @@ fail1:
return rc;
}
static int siena_rx_pull_rss_config(struct efx_nic *efx)
{
efx_oword_t temp;
/* Read from IPv6 RSS key as that's longer (the IPv4 key is just the
* first 128 bits of the same key, assuming it's been set by
* siena_rx_push_rss_config, below)
*/
efx_reado(efx, &temp, FR_CZ_RX_RSS_IPV6_REG1);
memcpy(efx->rx_hash_key, &temp, sizeof(temp));
efx_reado(efx, &temp, FR_CZ_RX_RSS_IPV6_REG2);
memcpy(efx->rx_hash_key + sizeof(temp), &temp, sizeof(temp));
efx_reado(efx, &temp, FR_CZ_RX_RSS_IPV6_REG3);
memcpy(efx->rx_hash_key + 2 * sizeof(temp), &temp,
FRF_CZ_RX_RSS_IPV6_TKEY_HI_WIDTH / 8);
efx_farch_rx_pull_indir_table(efx);
return 0;
}
static int siena_rx_push_rss_config(struct efx_nic *efx, bool user,
const u32 *rx_indir_table, const u8 *key)
{
@ -981,6 +1000,7 @@ const struct efx_nic_type siena_a0_nic_type = {
.tx_write = efx_farch_tx_write,
.tx_limit_len = efx_farch_tx_limit_len,
.rx_push_rss_config = siena_rx_push_rss_config,
.rx_pull_rss_config = siena_rx_pull_rss_config,
.rx_probe = efx_farch_rx_probe,
.rx_init = efx_farch_rx_init,
.rx_remove = efx_farch_rx_remove,