diff options
Diffstat (limited to 'drivers/net/ethernet/sfc/nic.h')
| -rw-r--r-- | drivers/net/ethernet/sfc/nic.h | 301 |
1 files changed, 3 insertions, 298 deletions
diff --git a/drivers/net/ethernet/sfc/nic.h b/drivers/net/ethernet/sfc/nic.h index 8f73c5d996eb..724e2776b585 100644 --- a/drivers/net/ethernet/sfc/nic.h +++ b/drivers/net/ethernet/sfc/nic.h @@ -8,133 +8,11 @@ #ifndef EFX_NIC_H #define EFX_NIC_H -#include <linux/net_tstamp.h> -#include "net_driver.h" +#include "nic_common.h" #include "efx.h" -#include "efx_common.h" -#include "mcdi.h" - -enum { - /* Revisions 0-2 were Falcon A0, A1 and B0 respectively. - * They are not supported by this driver but these revision numbers - * form part of the ethtool API for register dumping. - */ - EFX_REV_SIENA_A0 = 3, - EFX_REV_HUNT_A0 = 4, -}; - -static inline int efx_nic_rev(struct efx_nic *efx) -{ - return efx->type->revision; -} u32 efx_farch_fpga_ver(struct efx_nic *efx); -/* Read the current event from the event queue */ -static inline efx_qword_t *efx_event(struct efx_channel *channel, - unsigned int index) -{ - return ((efx_qword_t *) (channel->eventq.buf.addr)) + - (index & channel->eventq_mask); -} - -/* See if an event is present - * - * We check both the high and low dword of the event for all ones. We - * wrote all ones when we cleared the event, and no valid event can - * have all ones in either its high or low dwords. This approach is - * robust against reordering. - * - * Note that using a single 64-bit comparison is incorrect; even - * though the CPU read will be atomic, the DMA write may not be. - */ -static inline int efx_event_present(efx_qword_t *event) -{ - return !(EFX_DWORD_IS_ALL_ONES(event->dword[0]) | - EFX_DWORD_IS_ALL_ONES(event->dword[1])); -} - -/* Returns a pointer to the specified transmit descriptor in the TX - * descriptor queue belonging to the specified channel. - */ -static inline efx_qword_t * -efx_tx_desc(struct efx_tx_queue *tx_queue, unsigned int index) -{ - return ((efx_qword_t *) (tx_queue->txd.buf.addr)) + index; -} - -/* Get partner of a TX queue, seen as part of the same net core queue */ -static struct efx_tx_queue *efx_tx_queue_partner(struct efx_tx_queue *tx_queue) -{ - if (tx_queue->queue & EFX_TXQ_TYPE_OFFLOAD) - return tx_queue - EFX_TXQ_TYPE_OFFLOAD; - else - return tx_queue + EFX_TXQ_TYPE_OFFLOAD; -} - -/* Report whether this TX queue would be empty for the given write_count. - * May return false negative. - */ -static inline bool __efx_nic_tx_is_empty(struct efx_tx_queue *tx_queue, - unsigned int write_count) -{ - unsigned int empty_read_count = READ_ONCE(tx_queue->empty_read_count); - - if (empty_read_count == 0) - return false; - - return ((empty_read_count ^ write_count) & ~EFX_EMPTY_COUNT_VALID) == 0; -} - -/* Report whether the NIC considers this TX queue empty, using - * packet_write_count (the write count recorded for the last completable - * doorbell push). May return false negative. EF10 only, which is OK - * because only EF10 supports PIO. - */ -static inline bool efx_nic_tx_is_empty(struct efx_tx_queue *tx_queue) -{ - EFX_WARN_ON_ONCE_PARANOID(!tx_queue->efx->type->option_descriptors); - return __efx_nic_tx_is_empty(tx_queue, tx_queue->packet_write_count); -} - -/* Decide whether we can use TX PIO, ie. write packet data directly into - * a buffer on the device. This can reduce latency at the expense of - * throughput, so we only do this if both hardware and software TX rings - * are empty. This also ensures that only one packet at a time can be - * using the PIO buffer. - */ -static inline bool efx_nic_may_tx_pio(struct efx_tx_queue *tx_queue) -{ - struct efx_tx_queue *partner = efx_tx_queue_partner(tx_queue); - - return tx_queue->piobuf && efx_nic_tx_is_empty(tx_queue) && - efx_nic_tx_is_empty(partner); -} - -/* Decide whether to push a TX descriptor to the NIC vs merely writing - * the doorbell. This can reduce latency when we are adding a single - * descriptor to an empty queue, but is otherwise pointless. Further, - * Falcon and Siena have hardware bugs (SF bug 33851) that may be - * triggered if we don't check this. - * We use the write_count used for the last doorbell push, to get the - * NIC's view of the tx queue. - */ -static inline bool efx_nic_may_push_tx_desc(struct efx_tx_queue *tx_queue, - unsigned int write_count) -{ - bool was_empty = __efx_nic_tx_is_empty(tx_queue, write_count); - - tx_queue->empty_read_count = 0; - return was_empty && tx_queue->write_count - write_count == 1; -} - -/* Returns a pointer to the specified descriptor in the RX descriptor queue */ -static inline efx_qword_t * -efx_rx_desc(struct efx_rx_queue *rx_queue, unsigned int index) -{ - return ((efx_qword_t *) (rx_queue->rxd.buf.addr)) + index; -} - enum { PHY_TYPE_NONE = 0, PHY_TYPE_TXC43128 = 1, @@ -147,18 +25,6 @@ enum { PHY_TYPE_SFT9001B = 10, }; -/* Alignment of PCIe DMA boundaries (4KB) */ -#define EFX_PAGE_SIZE 4096 -/* Size and alignment of buffer table entries (same) */ -#define EFX_BUF_SIZE EFX_PAGE_SIZE - -/* NIC-generic software stats */ -enum { - GENERIC_STAT_rx_noskb_drops, - GENERIC_STAT_rx_nodesc_trunc, - GENERIC_STAT_COUNT -}; - enum { SIENA_STAT_tx_bytes = GENERIC_STAT_COUNT, SIENA_STAT_tx_good_bytes, @@ -368,6 +234,7 @@ enum { * @piobuf_size: size of a single PIO buffer * @must_restore_piobufs: Flag: PIO buffers have yet to be restored after MC * reboot + * @mc_stats: Scratch buffer for converting statistics to the kernel's format * @stats: Hardware statistics * @workaround_35388: Flag: firmware supports workaround for bug 35388 * @workaround_26807: Flag: firmware supports workaround for bug 26807 @@ -404,6 +271,7 @@ struct efx_ef10_nic_data { unsigned int piobuf_handle[EF10_TX_PIOBUF_COUNT]; u16 piobuf_size; bool must_restore_piobufs; + __le64 *mc_stats; u64 stats[EF10_STAT_COUNT]; bool workaround_35388; bool workaround_26807; @@ -432,123 +300,12 @@ struct efx_ef10_nic_data { int efx_init_sriov(void); void efx_fini_sriov(void); -struct ethtool_ts_info; -int efx_ptp_probe(struct efx_nic *efx, struct efx_channel *channel); -void efx_ptp_defer_probe_with_channel(struct efx_nic *efx); -struct efx_channel *efx_ptp_channel(struct efx_nic *efx); -void efx_ptp_remove(struct efx_nic *efx); -int efx_ptp_set_ts_config(struct efx_nic *efx, struct ifreq *ifr); -int efx_ptp_get_ts_config(struct efx_nic *efx, struct ifreq *ifr); -void efx_ptp_get_ts_info(struct efx_nic *efx, struct ethtool_ts_info *ts_info); -bool efx_ptp_is_ptp_tx(struct efx_nic *efx, struct sk_buff *skb); -int efx_ptp_get_mode(struct efx_nic *efx); -int efx_ptp_change_mode(struct efx_nic *efx, bool enable_wanted, - unsigned int new_mode); -int efx_ptp_tx(struct efx_nic *efx, struct sk_buff *skb); -void efx_ptp_event(struct efx_nic *efx, efx_qword_t *ev); -size_t efx_ptp_describe_stats(struct efx_nic *efx, u8 *strings); -size_t efx_ptp_update_stats(struct efx_nic *efx, u64 *stats); -void efx_time_sync_event(struct efx_channel *channel, efx_qword_t *ev); -void __efx_rx_skb_attach_timestamp(struct efx_channel *channel, - struct sk_buff *skb); -static inline void efx_rx_skb_attach_timestamp(struct efx_channel *channel, - struct sk_buff *skb) -{ - if (channel->sync_events_state == SYNC_EVENTS_VALID) - __efx_rx_skb_attach_timestamp(channel, skb); -} -void efx_ptp_start_datapath(struct efx_nic *efx); -void efx_ptp_stop_datapath(struct efx_nic *efx); -bool efx_ptp_use_mac_tx_timestamps(struct efx_nic *efx); -ktime_t efx_ptp_nic_to_kernel_time(struct efx_tx_queue *tx_queue); - -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; extern const struct efx_nic_type efx_hunt_a0_nic_type; extern const struct efx_nic_type efx_hunt_a0_vf_nic_type; -/************************************************************************** - * - * Externs - * - ************************************************************************** - */ - int falcon_probe_board(struct efx_nic *efx, u16 revision_info); -/* TX data path */ -static inline int efx_nic_probe_tx(struct efx_tx_queue *tx_queue) -{ - return tx_queue->efx->type->tx_probe(tx_queue); -} -static inline void efx_nic_init_tx(struct efx_tx_queue *tx_queue) -{ - tx_queue->efx->type->tx_init(tx_queue); -} -static inline void efx_nic_remove_tx(struct efx_tx_queue *tx_queue) -{ - tx_queue->efx->type->tx_remove(tx_queue); -} -static inline void efx_nic_push_buffers(struct efx_tx_queue *tx_queue) -{ - tx_queue->efx->type->tx_write(tx_queue); -} - -int efx_enqueue_skb_tso(struct efx_tx_queue *tx_queue, struct sk_buff *skb, - bool *data_mapped); - -/* RX data path */ -static inline int efx_nic_probe_rx(struct efx_rx_queue *rx_queue) -{ - return rx_queue->efx->type->rx_probe(rx_queue); -} -static inline void efx_nic_init_rx(struct efx_rx_queue *rx_queue) -{ - rx_queue->efx->type->rx_init(rx_queue); -} -static inline void efx_nic_remove_rx(struct efx_rx_queue *rx_queue) -{ - rx_queue->efx->type->rx_remove(rx_queue); -} -static inline void efx_nic_notify_rx_desc(struct efx_rx_queue *rx_queue) -{ - rx_queue->efx->type->rx_write(rx_queue); -} -static inline void efx_nic_generate_fill_event(struct efx_rx_queue *rx_queue) -{ - rx_queue->efx->type->rx_defer_refill(rx_queue); -} - -/* Event data path */ -static inline int efx_nic_probe_eventq(struct efx_channel *channel) -{ - return channel->efx->type->ev_probe(channel); -} -static inline int efx_nic_init_eventq(struct efx_channel *channel) -{ - return channel->efx->type->ev_init(channel); -} -static inline void efx_nic_fini_eventq(struct efx_channel *channel) -{ - channel->efx->type->ev_fini(channel); -} -static inline void efx_nic_remove_eventq(struct efx_channel *channel) -{ - channel->efx->type->ev_remove(channel); -} -static inline int -efx_nic_process_eventq(struct efx_channel *channel, int quota) -{ - return channel->efx->type->ev_process(channel, quota); -} -static inline void efx_nic_eventq_read_ack(struct efx_channel *channel) -{ - channel->efx->type->ev_read_ack(channel); -} - -void efx_nic_event_test_start(struct efx_channel *channel); - /* Falcon/Siena queue operations */ int efx_farch_tx_probe(struct efx_tx_queue *tx_queue); void efx_farch_tx_init(struct efx_tx_queue *tx_queue); @@ -598,31 +355,6 @@ bool efx_farch_filter_rfs_expire_one(struct efx_nic *efx, u32 flow_id, #endif void efx_farch_filter_sync_rx_mode(struct efx_nic *efx); -bool efx_nic_event_present(struct efx_channel *channel); - -/* Some statistics are computed as A - B where A and B each increase - * linearly with some hardware counter(s) and the counters are read - * asynchronously. If the counters contributing to B are always read - * after those contributing to A, the computed value may be lower than - * the true value by some variable amount, and may decrease between - * subsequent computations. - * - * We should never allow statistics to decrease or to exceed the true - * value. Since the computed value will never be greater than the - * true value, we can achieve this by only storing the computed value - * when it increases. - */ -static inline void efx_update_diff_stat(u64 *stat, u64 diff) -{ - if ((s64)(diff - *stat) > 0) - *stat = diff; -} - -/* Interrupts */ -int efx_nic_init_interrupt(struct efx_nic *efx); -int efx_nic_irq_test_start(struct efx_nic *efx); -void efx_nic_fini_interrupt(struct efx_nic *efx); - /* Falcon/Siena interrupts */ void efx_farch_irq_enable_master(struct efx_nic *efx); int efx_farch_irq_test_generate(struct efx_nic *efx); @@ -631,17 +363,7 @@ irqreturn_t efx_farch_msi_interrupt(int irq, void *dev_id); irqreturn_t efx_farch_legacy_interrupt(int irq, void *dev_id); irqreturn_t efx_farch_fatal_interrupt(struct efx_nic *efx); -static inline int efx_nic_event_test_irq_cpu(struct efx_channel *channel) -{ - return READ_ONCE(channel->event_test_cpu); -} -static inline int efx_nic_irq_test_irq_cpu(struct efx_nic *efx) -{ - return READ_ONCE(efx->last_irq_cpu); -} - /* Global Resources */ -int efx_nic_flush_queues(struct efx_nic *efx); void siena_prepare_flush(struct efx_nic *efx); int efx_farch_fini_dmaq(struct efx_nic *efx); void efx_farch_finish_flr(struct efx_nic *efx); @@ -651,14 +373,9 @@ void falcon_stop_nic_stats(struct efx_nic *efx); int falcon_reset_xaui(struct efx_nic *efx); 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); -void efx_nic_free_buffer(struct efx_nic *efx, struct efx_buffer *buffer); - /* Tests */ struct efx_farch_register_test { unsigned address; @@ -669,18 +386,6 @@ int efx_farch_test_registers(struct efx_nic *efx, const struct efx_farch_register_test *regs, size_t n_regs); -size_t efx_nic_get_regs_len(struct efx_nic *efx); -void efx_nic_get_regs(struct efx_nic *efx, void *buf); - -size_t efx_nic_describe_stats(const struct efx_hw_stat_desc *desc, size_t count, - const unsigned long *mask, u8 *names); -void efx_nic_update_stats(const struct efx_hw_stat_desc *desc, size_t count, - const unsigned long *mask, u64 *stats, - const void *dma_buf, bool accumulate); -void efx_nic_fix_nodesc_drop_stat(struct efx_nic *efx, u64 *stat); - -#define EFX_MAX_FLUSH_TIME 5000 - void efx_farch_generate_event(struct efx_nic *efx, unsigned int evq, efx_qword_t *event); |