From: Andrew Rybchenko <arybchenko@solarflare.com>
Date: Thu, 19 Apr 2018 11:36:49 +0000 (+0100)
Subject: net/sfc: factor out function to push Rx doorbell
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=a2443fdf8f1396502d3a7c8474d773074d06683d;p=dpdk.git

net/sfc: factor out function to push Rx doorbell

The function may be shared by different Rx datapath implementations.

Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Reviewed-by: Andy Moreton <amoreton@solarflare.com>
---

diff --git a/drivers/net/sfc/sfc_ef10.h b/drivers/net/sfc/sfc_ef10.h
index ace6a1ddc5..865359f5be 100644
--- a/drivers/net/sfc/sfc_ef10.h
+++ b/drivers/net/sfc/sfc_ef10.h
@@ -79,6 +79,37 @@ sfc_ef10_ev_present(const efx_qword_t ev)
 	       ~EFX_QWORD_FIELD(ev, EFX_DWORD_1);
 }
 
+
+/**
+ * Alignment requirement for value written to RX WPTR:
+ * the WPTR must be aligned to an 8 descriptor boundary.
+ */
+#define SFC_EF10_RX_WPTR_ALIGN	8u
+
+static inline void
+sfc_ef10_rx_qpush(volatile void *doorbell, unsigned int added,
+		  unsigned int ptr_mask)
+{
+	efx_dword_t dword;
+
+	/* Hardware has alignment restriction for WPTR */
+	RTE_BUILD_BUG_ON(SFC_RX_REFILL_BULK % SFC_EF10_RX_WPTR_ALIGN != 0);
+	SFC_ASSERT(RTE_ALIGN(added, SFC_EF10_RX_WPTR_ALIGN) == added);
+
+	EFX_POPULATE_DWORD_1(dword, ERF_DZ_RX_DESC_WPTR, added & ptr_mask);
+
+	/* DMA sync to device is not required */
+
+	/*
+	 * rte_write32() has rte_io_wmb() which guarantees that the STORE
+	 * operations (i.e. Rx and event descriptor updates) that precede
+	 * the rte_io_wmb() call are visible to NIC before the STORE
+	 * operations that follow it (i.e. doorbell write).
+	 */
+	rte_write32(dword.ed_u32[0], doorbell);
+}
+
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/drivers/net/sfc/sfc_ef10_rx.c b/drivers/net/sfc/sfc_ef10_rx.c
index 7d6b64ea2f..92e1ef0edb 100644
--- a/drivers/net/sfc/sfc_ef10_rx.c
+++ b/drivers/net/sfc/sfc_ef10_rx.c
@@ -29,12 +29,6 @@
 #define sfc_ef10_rx_err(dpq, ...) \
 	SFC_DP_LOG(SFC_KVARG_DATAPATH_EF10, ERR, dpq, __VA_ARGS__)
 
-/**
- * Alignment requirement for value written to RX WPTR:
- * the WPTR must be aligned to an 8 descriptor boundary.
- */
-#define SFC_EF10_RX_WPTR_ALIGN	8
-
 /**
  * Maximum number of descriptors/buffers in the Rx ring.
  * It should guarantee that corresponding event queue never overfill.
@@ -87,29 +81,6 @@ sfc_ef10_rxq_by_dp_rxq(struct sfc_dp_rxq *dp_rxq)
 	return container_of(dp_rxq, struct sfc_ef10_rxq, dp);
 }
 
-static void
-sfc_ef10_rx_qpush(struct sfc_ef10_rxq *rxq)
-{
-	efx_dword_t dword;
-
-	/* Hardware has alignment restriction for WPTR */
-	RTE_BUILD_BUG_ON(SFC_RX_REFILL_BULK % SFC_EF10_RX_WPTR_ALIGN != 0);
-	SFC_ASSERT(RTE_ALIGN(rxq->added, SFC_EF10_RX_WPTR_ALIGN) == rxq->added);
-
-	EFX_POPULATE_DWORD_1(dword, ERF_DZ_RX_DESC_WPTR,
-			     rxq->added & rxq->ptr_mask);
-
-	/* DMA sync to device is not required */
-
-	/*
-	 * rte_write32() has rte_io_wmb() which guarantees that the STORE
-	 * operations (i.e. Rx and event descriptor updates) that precede
-	 * the rte_io_wmb() call are visible to NIC before the STORE
-	 * operations that follow it (i.e. doorbell write).
-	 */
-	rte_write32(dword.ed_u32[0], rxq->doorbell);
-}
-
 static void
 sfc_ef10_rx_qrefill(struct sfc_ef10_rxq *rxq)
 {
@@ -120,6 +91,8 @@ sfc_ef10_rx_qrefill(struct sfc_ef10_rxq *rxq)
 	void *objs[SFC_RX_REFILL_BULK];
 	unsigned int added = rxq->added;
 
+	RTE_BUILD_BUG_ON(SFC_RX_REFILL_BULK % SFC_EF10_RX_WPTR_ALIGN != 0);
+
 	free_space = rxq->max_fill_level - (added - rxq->completed);
 
 	if (free_space < rxq->refill_threshold)
@@ -178,7 +151,7 @@ sfc_ef10_rx_qrefill(struct sfc_ef10_rxq *rxq)
 
 	SFC_ASSERT(rxq->added != added);
 	rxq->added = added;
-	sfc_ef10_rx_qpush(rxq);
+	sfc_ef10_rx_qpush(rxq->doorbell, added, ptr_mask);
 }
 
 static void