sfc: split up nic.h

The new nic_common.h contains the inlines for NIC-type function dispatch,
 declarations for NIC-generic functions in nic.c, and other similar NIC-
 generic functionality.  Retained in nic.h are NIC-specific declarations
 such as the siena and ef10 nic_data structs and various farch functions.

The EF100 driver will thus include nic_common.h but not nic.h.

Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 295 deletions

diff --git a/drivers/net/ethernet/sfc/nic.h b/drivers/net/ethernet/sfc/nic.h
index 792907aeeb75..135c43146c13 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,
@@ -434,123 +300,15 @@ 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);
@@ -600,31 +358,6 @@ 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);
@@ -633,17 +366,7 @@ 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);
@@ -657,10 +380,6 @@ 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;
@@ -671,19 +390,6 @@ 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);
-int efx_nic_copy_stats(struct efx_nic *efx, __le64 *dest);
-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);