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path: root/drivers/net/sfc/net_driver.h
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Diffstat (limited to 'drivers/net/sfc/net_driver.h')
-rw-r--r--drivers/net/sfc/net_driver.h87
1 files changed, 44 insertions, 43 deletions
diff --git a/drivers/net/sfc/net_driver.h b/drivers/net/sfc/net_driver.h
index b137c889152b..bdce66ddf93a 100644
--- a/drivers/net/sfc/net_driver.h
+++ b/drivers/net/sfc/net_driver.h
@@ -136,14 +136,19 @@ struct efx_tx_buffer {
* @efx: The associated Efx NIC
* @queue: DMA queue number
* @channel: The associated channel
+ * @core_txq: The networking core TX queue structure
* @buffer: The software buffer ring
* @txd: The hardware descriptor ring
* @ptr_mask: The size of the ring minus 1.
* @flushed: Used when handling queue flushing
* @read_count: Current read pointer.
* This is the number of buffers that have been removed from both rings.
- * @stopped: Stopped count.
- * Set if this TX queue is currently stopping its port.
+ * @old_write_count: The value of @write_count when last checked.
+ * This is here for performance reasons. The xmit path will
+ * only get the up-to-date value of @write_count if this
+ * variable indicates that the queue is empty. This is to
+ * avoid cache-line ping-pong between the xmit path and the
+ * completion path.
* @insert_count: Current insert pointer
* This is the number of buffers that have been added to the
* software ring.
@@ -163,13 +168,17 @@ struct efx_tx_buffer {
* @tso_long_headers: Number of packets with headers too long for standard
* blocks
* @tso_packets: Number of packets via the TSO xmit path
+ * @pushes: Number of times the TX push feature has been used
+ * @empty_read_count: If the completion path has seen the queue as empty
+ * and the transmission path has not yet checked this, the value of
+ * @read_count bitwise-added to %EFX_EMPTY_COUNT_VALID; otherwise 0.
*/
struct efx_tx_queue {
/* Members which don't change on the fast path */
struct efx_nic *efx ____cacheline_aligned_in_smp;
unsigned queue;
struct efx_channel *channel;
- struct efx_nic *nic;
+ struct netdev_queue *core_txq;
struct efx_tx_buffer *buffer;
struct efx_special_buffer txd;
unsigned int ptr_mask;
@@ -177,7 +186,7 @@ struct efx_tx_queue {
/* Members used mainly on the completion path */
unsigned int read_count ____cacheline_aligned_in_smp;
- int stopped;
+ unsigned int old_write_count;
/* Members used only on the xmit path */
unsigned int insert_count ____cacheline_aligned_in_smp;
@@ -187,6 +196,11 @@ struct efx_tx_queue {
unsigned int tso_bursts;
unsigned int tso_long_headers;
unsigned int tso_packets;
+ unsigned int pushes;
+
+ /* Members shared between paths and sometimes updated */
+ unsigned int empty_read_count ____cacheline_aligned_in_smp;
+#define EFX_EMPTY_COUNT_VALID 0x80000000
};
/**
@@ -305,7 +319,6 @@ enum efx_rx_alloc_method {
* @irq_moderation: IRQ moderation value (in hardware ticks)
* @napi_dev: Net device used with NAPI
* @napi_str: NAPI control structure
- * @reset_work: Scheduled reset work thread
* @work_pending: Is work pending via NAPI?
* @eventq: Event queue buffer
* @eventq_mask: Event queue pointer mask
@@ -326,8 +339,6 @@ enum efx_rx_alloc_method {
* @n_rx_overlength: Count of RX_OVERLENGTH errors
* @n_skbuff_leaks: Count of skbuffs leaked due to RX overrun
* @rx_queue: RX queue for this channel
- * @tx_stop_count: Core TX queue stop count
- * @tx_stop_lock: Core TX queue stop lock
* @tx_queue: TX queues for this channel
*/
struct efx_channel {
@@ -366,10 +377,6 @@ struct efx_channel {
bool rx_pkt_csummed;
struct efx_rx_queue rx_queue;
-
- atomic_t tx_stop_count;
- spinlock_t tx_stop_lock;
-
struct efx_tx_queue tx_queue[2];
};
@@ -626,10 +633,8 @@ struct efx_filter_state;
* Work items do not hold and must not acquire RTNL.
* @workqueue_name: Name of workqueue
* @reset_work: Scheduled reset workitem
- * @monitor_work: Hardware monitor workitem
* @membase_phys: Memory BAR value as physical address
* @membase: Memory BAR value
- * @biu_lock: BIU (bus interface unit) lock
* @interrupt_mode: Interrupt mode
* @irq_rx_adaptive: Adaptive IRQ moderation enabled for RX event queues
* @irq_rx_moderation: IRQ moderation time for RX event queues
@@ -648,23 +653,14 @@ struct efx_filter_state;
* @n_tx_channels: Number of channels used for TX
* @rx_buffer_len: RX buffer length
* @rx_buffer_order: Order (log2) of number of pages for each RX buffer
+ * @rx_hash_key: Toeplitz hash key for RSS
* @rx_indir_table: Indirection table for RSS
* @int_error_count: Number of internal errors seen recently
* @int_error_expire: Time at which error count will be expired
* @irq_status: Interrupt status buffer
- * @last_irq_cpu: Last CPU to handle interrupt.
- * This register is written with the SMP processor ID whenever an
- * interrupt is handled. It is used by efx_nic_test_interrupt()
- * to verify that an interrupt has occurred.
* @irq_zero_count: Number of legacy IRQs seen with queue flags == 0
* @fatal_irq_level: IRQ level (bit number) used for serious errors
- * @spi_flash: SPI flash device
- * This field will be %NULL if no flash device is present (or for Siena).
- * @spi_eeprom: SPI EEPROM device
- * This field will be %NULL if no EEPROM device is present (or for Siena).
- * @spi_lock: SPI bus lock
* @mtd_list: List of MTDs attached to the NIC
- * @n_rx_nodesc_drop_cnt: RX no descriptor drop count
* @nic_data: Hardware dependant state
* @mac_lock: MAC access lock. Protects @port_enabled, @phy_mode,
* @port_inhibited, efx_monitor() and efx_reconfigure_port()
@@ -677,21 +673,14 @@ struct efx_filter_state;
* @port_initialized: Port initialized?
* @net_dev: Operating system network device. Consider holding the rtnl lock
* @rx_checksum_enabled: RX checksumming enabled
- * @mac_stats: MAC statistics. These include all statistics the MACs
- * can provide. Generic code converts these into a standard
- * &struct net_device_stats.
* @stats_buffer: DMA buffer for statistics
- * @stats_lock: Statistics update lock. Serialises statistics fetches
* @mac_op: MAC interface
- * @mac_address: Permanent MAC address
* @phy_type: PHY type
- * @mdio_lock: MDIO lock
* @phy_op: PHY interface
* @phy_data: PHY private data (including PHY-specific stats)
* @mdio: PHY MDIO interface
* @mdio_bus: PHY MDIO bus ID (only used by Siena)
* @phy_mode: PHY operating mode. Serialised by @mac_lock.
- * @xmac_poll_required: XMAC link state needs polling
* @link_advertising: Autonegotiation advertising flags
* @link_state: Current state of the link
* @n_link_state_changes: Number of times the link has changed state
@@ -702,10 +691,23 @@ struct efx_filter_state;
* @loopback_mode: Loopback status
* @loopback_modes: Supported loopback mode bitmask
* @loopback_selftest: Offline self-test private state
+ * @monitor_work: Hardware monitor workitem
+ * @biu_lock: BIU (bus interface unit) lock
+ * @last_irq_cpu: Last CPU to handle interrupt.
+ * This register is written with the SMP processor ID whenever an
+ * interrupt is handled. It is used by efx_nic_test_interrupt()
+ * to verify that an interrupt has occurred.
+ * @n_rx_nodesc_drop_cnt: RX no descriptor drop count
+ * @mac_stats: MAC statistics. These include all statistics the MACs
+ * can provide. Generic code converts these into a standard
+ * &struct net_device_stats.
+ * @stats_lock: Statistics update lock. Serialises statistics fetches
*
* This is stored in the private area of the &struct net_device.
*/
struct efx_nic {
+ /* The following fields should be written very rarely */
+
char name[IFNAMSIZ];
struct pci_dev *pci_dev;
const struct efx_nic_type *type;
@@ -714,10 +716,9 @@ struct efx_nic {
struct workqueue_struct *workqueue;
char workqueue_name[16];
struct work_struct reset_work;
- struct delayed_work monitor_work;
resource_size_t membase_phys;
void __iomem *membase;
- spinlock_t biu_lock;
+
enum efx_int_mode interrupt_mode;
bool irq_rx_adaptive;
unsigned int irq_rx_moderation;
@@ -744,19 +745,13 @@ struct efx_nic {
unsigned long int_error_expire;
struct efx_buffer irq_status;
- volatile signed int last_irq_cpu;
unsigned irq_zero_count;
unsigned fatal_irq_level;
- struct efx_spi_device *spi_flash;
- struct efx_spi_device *spi_eeprom;
- struct mutex spi_lock;
#ifdef CONFIG_SFC_MTD
struct list_head mtd_list;
#endif
- unsigned n_rx_nodesc_drop_cnt;
-
void *nic_data;
struct mutex mac_lock;
@@ -768,22 +763,17 @@ struct efx_nic {
struct net_device *net_dev;
bool rx_checksum_enabled;
- struct efx_mac_stats mac_stats;
struct efx_buffer stats_buffer;
- spinlock_t stats_lock;
struct efx_mac_operations *mac_op;
- unsigned char mac_address[ETH_ALEN];
unsigned int phy_type;
- struct mutex mdio_lock;
struct efx_phy_operations *phy_op;
void *phy_data;
struct mdio_if_info mdio;
unsigned int mdio_bus;
enum efx_phy_mode phy_mode;
- bool xmac_poll_required;
u32 link_advertising;
struct efx_link_state link_state;
unsigned int n_link_state_changes;
@@ -799,6 +789,15 @@ struct efx_nic {
void *loopback_selftest;
struct efx_filter_state *filter_state;
+
+ /* The following fields may be written more often */
+
+ struct delayed_work monitor_work ____cacheline_aligned_in_smp;
+ spinlock_t biu_lock;
+ volatile signed int last_irq_cpu;
+ unsigned n_rx_nodesc_drop_cnt;
+ struct efx_mac_stats mac_stats;
+ spinlock_t stats_lock;
};
static inline int efx_dev_registered(struct efx_nic *efx)
@@ -831,6 +830,7 @@ static inline unsigned int efx_port_num(struct efx_nic *efx)
* be called while the controller is uninitialised.
* @probe_port: Probe the MAC and PHY
* @remove_port: Free resources allocated by probe_port()
+ * @handle_global_event: Handle a "global" event (may be %NULL)
* @prepare_flush: Prepare the hardware for flushing the DMA queues
* @update_stats: Update statistics not provided by event handling
* @start_stats: Start the regular fetching of statistics
@@ -875,6 +875,7 @@ struct efx_nic_type {
int (*reset)(struct efx_nic *efx, enum reset_type method);
int (*probe_port)(struct efx_nic *efx);
void (*remove_port)(struct efx_nic *efx);
+ bool (*handle_global_event)(struct efx_channel *channel, efx_qword_t *);
void (*prepare_flush)(struct efx_nic *efx);
void (*update_stats)(struct efx_nic *efx);
void (*start_stats)(struct efx_nic *efx);