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Message-ID: <3fd85102-6094-1576-69b1-2d77e8601c60@solarflare.com>
Date: Tue, 17 Jan 2017 12:01:53 +0000
From: Edward Cree <ecree@...arflare.com>
To: <linux-net-drivers@...arflare.com>, <davem@...emloft.net>
CC: <netdev@...r.kernel.org>
Subject: [PATCH net-next 1/2] sfc: support setting RSS hash key through
ethtool API
Signed-off-by: Edward Cree <ecree@...arflare.com>
---
drivers/net/ethernet/sfc/ef10.c | 32 ++++++++++++++++++++++++--------
drivers/net/ethernet/sfc/ethtool.c | 24 +++++++++++++++++++-----
drivers/net/ethernet/sfc/net_driver.h | 3 ++-
drivers/net/ethernet/sfc/siena.c | 7 +++++--
4 files changed, 50 insertions(+), 16 deletions(-)
diff --git a/drivers/net/ethernet/sfc/ef10.c b/drivers/net/ethernet/sfc/ef10.c
index 2ce5769..f117e0b 100644
--- a/drivers/net/ethernet/sfc/ef10.c
+++ b/drivers/net/ethernet/sfc/ef10.c
@@ -1325,7 +1325,7 @@ static int efx_ef10_init_nic(struct efx_nic *efx)
}
/* don't fail init if RSS setup doesn't work */
- rc = efx->type->rx_push_rss_config(efx, false, efx->rx_indir_table);
+ rc = efx->type->rx_push_rss_config(efx, false, efx->rx_indir_table, NULL);
efx->rss_active = (rc == 0);
return 0;
@@ -2535,7 +2535,7 @@ static void efx_ef10_free_rss_context(struct efx_nic *efx, u32 context)
}
static int efx_ef10_populate_rss_table(struct efx_nic *efx, u32 context,
- const u32 *rx_indir_table)
+ const u32 *rx_indir_table, const u8 *key)
{
MCDI_DECLARE_BUF(tablebuf, MC_CMD_RSS_CONTEXT_SET_TABLE_IN_LEN);
MCDI_DECLARE_BUF(keybuf, MC_CMD_RSS_CONTEXT_SET_KEY_IN_LEN);
@@ -2546,6 +2546,11 @@ static int efx_ef10_populate_rss_table(struct efx_nic *efx, u32 context,
BUILD_BUG_ON(ARRAY_SIZE(efx->rx_indir_table) !=
MC_CMD_RSS_CONTEXT_SET_TABLE_IN_INDIRECTION_TABLE_LEN);
+ /* This iterates over the length of efx->rx_indir_table, but copies
+ * bytes from rx_indir_table. That's because the latter is a pointer
+ * rather than an array, but should have the same length.
+ * The efx->rx_hash_key loop below is similar.
+ */
for (i = 0; i < ARRAY_SIZE(efx->rx_indir_table); ++i)
MCDI_PTR(tablebuf,
RSS_CONTEXT_SET_TABLE_IN_INDIRECTION_TABLE)[i] =
@@ -2561,8 +2566,7 @@ static int efx_ef10_populate_rss_table(struct efx_nic *efx, u32 context,
BUILD_BUG_ON(ARRAY_SIZE(efx->rx_hash_key) !=
MC_CMD_RSS_CONTEXT_SET_KEY_IN_TOEPLITZ_KEY_LEN);
for (i = 0; i < ARRAY_SIZE(efx->rx_hash_key); ++i)
- MCDI_PTR(keybuf, RSS_CONTEXT_SET_KEY_IN_TOEPLITZ_KEY)[i] =
- efx->rx_hash_key[i];
+ MCDI_PTR(keybuf, RSS_CONTEXT_SET_KEY_IN_TOEPLITZ_KEY)[i] = key[i];
return efx_mcdi_rpc(efx, MC_CMD_RSS_CONTEXT_SET_KEY, keybuf,
sizeof(keybuf), NULL, 0, NULL);
@@ -2595,7 +2599,8 @@ static int efx_ef10_rx_push_shared_rss_config(struct efx_nic *efx,
}
static int efx_ef10_rx_push_exclusive_rss_config(struct efx_nic *efx,
- const u32 *rx_indir_table)
+ const u32 *rx_indir_table,
+ const u8 *key)
{
struct efx_ef10_nic_data *nic_data = efx->nic_data;
int rc;
@@ -2614,7 +2619,7 @@ static int efx_ef10_rx_push_exclusive_rss_config(struct efx_nic *efx,
}
rc = efx_ef10_populate_rss_table(efx, new_rx_rss_context,
- rx_indir_table);
+ rx_indir_table, key);
if (rc != 0)
goto fail2;
@@ -2625,6 +2630,9 @@ static int efx_ef10_rx_push_exclusive_rss_config(struct efx_nic *efx,
if (rx_indir_table != efx->rx_indir_table)
memcpy(efx->rx_indir_table, rx_indir_table,
sizeof(efx->rx_indir_table));
+ if (key != efx->rx_hash_key)
+ memcpy(efx->rx_hash_key, key, efx->type->rx_hash_key_size);
+
return 0;
fail2:
@@ -2636,14 +2644,18 @@ static int efx_ef10_rx_push_exclusive_rss_config(struct efx_nic *efx,
}
static int efx_ef10_pf_rx_push_rss_config(struct efx_nic *efx, bool user,
- const u32 *rx_indir_table)
+ const u32 *rx_indir_table,
+ const u8 *key)
{
int rc;
if (efx->rss_spread == 1)
return 0;
- rc = efx_ef10_rx_push_exclusive_rss_config(efx, rx_indir_table);
+ if (!key)
+ key = efx->rx_hash_key;
+
+ rc = efx_ef10_rx_push_exclusive_rss_config(efx, rx_indir_table, key);
if (rc == -ENOBUFS && !user) {
unsigned context_size;
@@ -2681,6 +2693,8 @@ static int efx_ef10_pf_rx_push_rss_config(struct efx_nic *efx, bool user,
static int efx_ef10_vf_rx_push_rss_config(struct efx_nic *efx, bool user,
const u32 *rx_indir_table
+ __attribute__ ((unused)),
+ const u8 *key
__attribute__ ((unused)))
{
struct efx_ef10_nic_data *nic_data = efx->nic_data;
@@ -5686,6 +5700,7 @@ const struct efx_nic_type efx_hunt_a0_vf_nic_type = {
.max_rx_ip_filters = HUNT_FILTER_TBL_ROWS,
.hwtstamp_filters = 1 << HWTSTAMP_FILTER_NONE |
1 << HWTSTAMP_FILTER_ALL,
+ .rx_hash_key_size = 40,
};
const struct efx_nic_type efx_hunt_a0_nic_type = {
@@ -5812,4 +5827,5 @@ const struct efx_nic_type efx_hunt_a0_nic_type = {
.max_rx_ip_filters = HUNT_FILTER_TBL_ROWS,
.hwtstamp_filters = 1 << HWTSTAMP_FILTER_NONE |
1 << HWTSTAMP_FILTER_ALL,
+ .rx_hash_key_size = 40,
};
diff --git a/drivers/net/ethernet/sfc/ethtool.c b/drivers/net/ethernet/sfc/ethtool.c
index 18ebaea..becdba3 100644
--- a/drivers/net/ethernet/sfc/ethtool.c
+++ b/drivers/net/ethernet/sfc/ethtool.c
@@ -1278,6 +1278,13 @@ static u32 efx_ethtool_get_rxfh_indir_size(struct net_device *net_dev)
return (efx->n_rx_channels == 1) ? 0 : ARRAY_SIZE(efx->rx_indir_table);
}
+static u32 efx_ethtool_get_rxfh_key_size(struct net_device *net_dev)
+{
+ struct efx_nic *efx = netdev_priv(net_dev);
+
+ return efx->type->rx_hash_key_size;
+}
+
static int efx_ethtool_get_rxfh(struct net_device *net_dev, u32 *indir, u8 *key,
u8 *hfunc)
{
@@ -1287,6 +1294,8 @@ static int efx_ethtool_get_rxfh(struct net_device *net_dev, u32 *indir, u8 *key,
*hfunc = ETH_RSS_HASH_TOP;
if (indir)
memcpy(indir, efx->rx_indir_table, sizeof(efx->rx_indir_table));
+ if (key)
+ memcpy(key, efx->rx_hash_key, efx->type->rx_hash_key_size);
return 0;
}
@@ -1295,14 +1304,18 @@ static int efx_ethtool_set_rxfh(struct net_device *net_dev, const u32 *indir,
{
struct efx_nic *efx = netdev_priv(net_dev);
- /* We do not allow change in unsupported parameters */
- if (key ||
- (hfunc != ETH_RSS_HASH_NO_CHANGE && hfunc != ETH_RSS_HASH_TOP))
+ /* Hash function is Toeplitz, cannot be changed */
+ if (hfunc != ETH_RSS_HASH_NO_CHANGE && hfunc != ETH_RSS_HASH_TOP)
return -EOPNOTSUPP;
- if (!indir)
+ if (!indir && !key)
return 0;
- return efx->type->rx_push_rss_config(efx, true, indir);
+ if (!key)
+ key = efx->rx_hash_key;
+ if (!indir)
+ indir = efx->rx_indir_table;
+
+ return efx->type->rx_push_rss_config(efx, true, indir, key);
}
static int efx_ethtool_get_ts_info(struct net_device *net_dev,
@@ -1377,6 +1390,7 @@ const struct ethtool_ops efx_ethtool_ops = {
.get_rxnfc = efx_ethtool_get_rxnfc,
.set_rxnfc = efx_ethtool_set_rxnfc,
.get_rxfh_indir_size = efx_ethtool_get_rxfh_indir_size,
+ .get_rxfh_key_size = efx_ethtool_get_rxfh_key_size,
.get_rxfh = efx_ethtool_get_rxfh,
.set_rxfh = efx_ethtool_set_rxfh,
.get_ts_info = efx_ethtool_get_ts_info,
diff --git a/drivers/net/ethernet/sfc/net_driver.h b/drivers/net/ethernet/sfc/net_driver.h
index b20fe43..ad53551 100644
--- a/drivers/net/ethernet/sfc/net_driver.h
+++ b/drivers/net/ethernet/sfc/net_driver.h
@@ -1311,7 +1311,7 @@ struct efx_nic_type {
unsigned int (*tx_limit_len)(struct efx_tx_queue *tx_queue,
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 u32 *rx_indir_table, const u8 *key);
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);
@@ -1410,6 +1410,7 @@ struct efx_nic_type {
int mcdi_max_ver;
unsigned int max_rx_ip_filters;
u32 hwtstamp_filters;
+ unsigned int rx_hash_key_size;
};
/**************************************************************************
diff --git a/drivers/net/ethernet/sfc/siena.c b/drivers/net/ethernet/sfc/siena.c
index 118ff56..0606aa2 100644
--- a/drivers/net/ethernet/sfc/siena.c
+++ b/drivers/net/ethernet/sfc/siena.c
@@ -333,11 +333,13 @@ static int siena_probe_nic(struct efx_nic *efx)
}
static int siena_rx_push_rss_config(struct efx_nic *efx, bool user,
- const u32 *rx_indir_table)
+ const u32 *rx_indir_table, const u8 *key)
{
efx_oword_t temp;
/* Set hash key for IPv4 */
+ if (key)
+ memcpy(efx->rx_hash_key, key, sizeof(temp));
memcpy(&temp, efx->rx_hash_key, sizeof(temp));
efx_writeo(efx, &temp, FR_BZ_RX_RSS_TKEY);
@@ -402,7 +404,7 @@ static int siena_init_nic(struct efx_nic *efx)
EFX_RX_USR_BUF_SIZE >> 5);
efx_writeo(efx, &temp, FR_AZ_RX_CFG);
- siena_rx_push_rss_config(efx, false, efx->rx_indir_table);
+ siena_rx_push_rss_config(efx, false, efx->rx_indir_table, NULL);
efx->rss_active = true;
/* Enable event logging */
@@ -1054,4 +1056,5 @@ const struct efx_nic_type siena_a0_nic_type = {
.hwtstamp_filters = (1 << HWTSTAMP_FILTER_NONE |
1 << HWTSTAMP_FILTER_PTP_V1_L4_EVENT |
1 << HWTSTAMP_FILTER_PTP_V2_L4_EVENT),
+ .rx_hash_key_size = 16,
};
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