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sfc: support RSS spreading of ethtool ntuple filters

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Use a linked list to associate user-facing context IDs with FW-facing
 context IDs (since the latter can change after an MC reset).

Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Edward Cree
2018-03-08 15:45:17 +00:00
committed by David S. Miller
parent 84a1d9c482
commit 42356d9a13
9 changed files with 443 additions and 150 deletions
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44
drivers/net/ethernet/sfc/net_driver.h
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@@ -704,6 +704,28 @@ union efx_multicast_hash {
struct vfdi_status;
/* The reserved RSS context value */
#define EFX_EF10_RSS_CONTEXT_INVALID 0xffffffff
/**
* struct efx_rss_context - A user-defined RSS context for filtering
* @list: node of linked list on which this struct is stored
* @context_id: the RSS_CONTEXT_ID returned by MC firmware, or
* %EFX_EF10_RSS_CONTEXT_INVALID if this context is not present on the NIC.
* For Siena, 0 if RSS is active, else %EFX_EF10_RSS_CONTEXT_INVALID.
* @user_id: the rss_context ID exposed to userspace over ethtool.
* @rx_hash_udp_4tuple: UDP 4-tuple hashing enabled
* @rx_hash_key: Toeplitz hash key for this RSS context
* @indir_table: Indirection table for this RSS context
*/
struct efx_rss_context {
struct list_head list;
u32 context_id;
u32 user_id;
bool rx_hash_udp_4tuple;
u8 rx_hash_key[40];
u32 rx_indir_table[128];
};
/**
* struct efx_nic - an Efx NIC
* @name: Device name (net device name or bus id before net device registered)
@@ -764,11 +786,9 @@ struct vfdi_status;
* (valid only for NICs that set %EFX_RX_PKT_PREFIX_LEN; always negative)
* @rx_packet_ts_offset: Offset of timestamp from start of packet data
* (valid only if channel->sync_timestamps_enabled; always negative)
* @rx_hash_key: Toeplitz hash key for RSS
* @rx_indir_table: Indirection table for RSS
* @rx_scatter: Scatter mode enabled for receives
* @rss_active: RSS enabled on hardware
* @rx_hash_udp_4tuple: UDP 4-tuple hashing enabled
* @rss_context: Main RSS context. Its @list member is the head of the list of
* RSS contexts created by user requests
* @int_error_count: Number of internal errors seen recently
* @int_error_expire: Time at which error count will be expired
* @irq_soft_enabled: Are IRQs soft-enabled? If not, IRQ handler will
@@ -909,11 +929,8 @@ struct efx_nic {
int rx_packet_hash_offset;
int rx_packet_len_offset;
int rx_packet_ts_offset;
u8 rx_hash_key[40];
u32 rx_indir_table[128];
bool rx_scatter;
bool rss_active;
bool rx_hash_udp_4tuple;
struct efx_rss_context rss_context;
unsigned int_error_count;
unsigned long int_error_expire;
@@ -1099,6 +1116,10 @@ struct efx_udp_tunnel {
* @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_push_rss_context_config: Write RSS hash key and indirection table for
* user RSS context to the NIC
* @rx_pull_rss_context_config: Read RSS hash key and indirection table for user
* RSS context 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
@@ -1237,6 +1258,13 @@ struct efx_nic_type {
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_push_rss_context_config)(struct efx_nic *efx,
struct efx_rss_context *ctx,
const u32 *rx_indir_table,
const u8 *key);
int (*rx_pull_rss_context_config)(struct efx_nic *efx,
struct efx_rss_context *ctx);
void (*rx_restore_rss_contexts)(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);