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Date: Thu, 27 Jun 2019 15:08:34 -0700
From: Jonathan Lemon <jonathan.lemon@...il.com>
To: <netdev@...r.kernel.org>, <bjorn.topel@...el.com>,
<magnus.karlsson@...el.com>, <saeedm@...lanox.com>,
<maximmi@...lanox.com>, <brouer@...hat.com>
CC: <kernel-team@...com>
Subject: [PATCH 4/6 bfp-next] Simplify AF_XDP umem allocation path for Intel drivers.
Now that the recycle stack is always used for the driver umem path, the
driver code path can be simplified.
Signed-off-by: Jonathan Lemon <jonathan.lemon@...il.com>
---
drivers/net/ethernet/intel/i40e/i40e_xsk.c | 76 ++-----------------
.../ethernet/intel/ixgbe/ixgbe_txrx_common.h | 2 +-
drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c | 49 +-----------
3 files changed, 13 insertions(+), 114 deletions(-)
diff --git a/drivers/net/ethernet/intel/i40e/i40e_xsk.c b/drivers/net/ethernet/intel/i40e/i40e_xsk.c
index 7efe5905b0af..ce8650d06962 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_xsk.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_xsk.c
@@ -265,44 +265,16 @@ static bool i40e_alloc_buffer_zc(struct i40e_ring *rx_ring,
}
/**
- * i40e_alloc_buffer_slow_zc - Allocates an i40e_rx_buffer
+ * i40e_alloc_rx_buffers_zc - Allocates a number of Rx buffers
* @rx_ring: Rx ring
- * @bi: Rx buffer to populate
+ * @count: The number of buffers to allocate
*
- * This function allocates an Rx buffer. The buffer can come from fill
- * queue, or via the reuse queue.
+ * This function allocates a number of Rx buffers from the fill ring
+ * or the internal recycle mechanism and places them on the Rx ring.
*
* Returns true for a successful allocation, false otherwise
**/
-static bool i40e_alloc_buffer_slow_zc(struct i40e_ring *rx_ring,
- struct i40e_rx_buffer *bi)
-{
- struct xdp_umem *umem = rx_ring->xsk_umem;
- u64 handle, hr;
-
- if (!xsk_umem_peek_addr_rq(umem, &handle)) {
- rx_ring->rx_stats.alloc_page_failed++;
- return false;
- }
-
- hr = umem->headroom + XDP_PACKET_HEADROOM;
-
- bi->dma = xdp_umem_get_dma(umem, handle);
- bi->dma += hr;
-
- bi->addr = xdp_umem_get_data(umem, handle);
- bi->addr += hr;
-
- bi->handle = handle + umem->headroom;
-
- xsk_umem_discard_addr_rq(umem);
- return true;
-}
-
-static __always_inline bool
-__i40e_alloc_rx_buffers_zc(struct i40e_ring *rx_ring, u16 count,
- bool alloc(struct i40e_ring *rx_ring,
- struct i40e_rx_buffer *bi))
+bool i40e_alloc_rx_buffers_zc(struct i40e_ring *rx_ring, u16 count)
{
u16 ntu = rx_ring->next_to_use;
union i40e_rx_desc *rx_desc;
@@ -312,7 +284,7 @@ __i40e_alloc_rx_buffers_zc(struct i40e_ring *rx_ring, u16 count,
rx_desc = I40E_RX_DESC(rx_ring, ntu);
bi = &rx_ring->rx_bi[ntu];
do {
- if (!alloc(rx_ring, bi)) {
+ if (!i40e_alloc_buffer_zc(rx_ring, bi)) {
ok = false;
goto no_buffers;
}
@@ -344,38 +316,6 @@ __i40e_alloc_rx_buffers_zc(struct i40e_ring *rx_ring, u16 count,
return ok;
}
-/**
- * i40e_alloc_rx_buffers_zc - Allocates a number of Rx buffers
- * @rx_ring: Rx ring
- * @count: The number of buffers to allocate
- *
- * This function allocates a number of Rx buffers from the reuse queue
- * or fill ring and places them on the Rx ring.
- *
- * Returns true for a successful allocation, false otherwise
- **/
-bool i40e_alloc_rx_buffers_zc(struct i40e_ring *rx_ring, u16 count)
-{
- return __i40e_alloc_rx_buffers_zc(rx_ring, count,
- i40e_alloc_buffer_slow_zc);
-}
-
-/**
- * i40e_alloc_rx_buffers_fast_zc - Allocates a number of Rx buffers
- * @rx_ring: Rx ring
- * @count: The number of buffers to allocate
- *
- * This function allocates a number of Rx buffers from the fill ring
- * or the internal recycle mechanism and places them on the Rx ring.
- *
- * Returns true for a successful allocation, false otherwise
- **/
-static bool i40e_alloc_rx_buffers_fast_zc(struct i40e_ring *rx_ring, u16 count)
-{
- return __i40e_alloc_rx_buffers_zc(rx_ring, count,
- i40e_alloc_buffer_zc);
-}
-
/**
* i40e_get_rx_buffer_zc - Return the current Rx buffer
* @rx_ring: Rx ring
@@ -541,8 +481,8 @@ int i40e_clean_rx_irq_zc(struct i40e_ring *rx_ring, int budget)
if (cleaned_count >= I40E_RX_BUFFER_WRITE) {
failure = failure ||
- !i40e_alloc_rx_buffers_fast_zc(rx_ring,
- cleaned_count);
+ !i40e_alloc_rx_buffers_zc(rx_ring,
+ cleaned_count);
cleaned_count = 0;
}
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_txrx_common.h b/drivers/net/ethernet/intel/ixgbe/ixgbe_txrx_common.h
index d93a690aff74..7408fbc2e1e1 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_txrx_common.h
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_txrx_common.h
@@ -35,7 +35,7 @@ int ixgbe_xsk_umem_setup(struct ixgbe_adapter *adapter, struct xdp_umem *umem,
void ixgbe_zca_free(struct zero_copy_allocator *alloc, unsigned long handle);
-void ixgbe_alloc_rx_buffers_zc(struct ixgbe_ring *rx_ring, u16 cleaned_count);
+bool ixgbe_alloc_rx_buffers_zc(struct ixgbe_ring *rx_ring, u16 cleaned_count);
int ixgbe_clean_rx_irq_zc(struct ixgbe_q_vector *q_vector,
struct ixgbe_ring *rx_ring,
const int budget);
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c
index 1e09fa7ffb90..65feb16200ea 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c
@@ -278,35 +278,7 @@ static bool ixgbe_alloc_buffer_zc(struct ixgbe_ring *rx_ring,
return true;
}
-static bool ixgbe_alloc_buffer_slow_zc(struct ixgbe_ring *rx_ring,
- struct ixgbe_rx_buffer *bi)
-{
- struct xdp_umem *umem = rx_ring->xsk_umem;
- u64 handle, hr;
-
- if (!xsk_umem_peek_addr_rq(umem, &handle)) {
- rx_ring->rx_stats.alloc_rx_page_failed++;
- return false;
- }
-
- hr = umem->headroom + XDP_PACKET_HEADROOM;
-
- bi->dma = xdp_umem_get_dma(umem, handle);
- bi->dma += hr;
-
- bi->addr = xdp_umem_get_data(umem, handle);
- bi->addr += hr;
-
- bi->handle = handle + umem->headroom;
-
- xsk_umem_discard_addr_rq(umem);
- return true;
-}
-
-static __always_inline bool
-__ixgbe_alloc_rx_buffers_zc(struct ixgbe_ring *rx_ring, u16 cleaned_count,
- bool alloc(struct ixgbe_ring *rx_ring,
- struct ixgbe_rx_buffer *bi))
+bool ixgbe_alloc_rx_buffers_zc(struct ixgbe_ring *rx_ring, u16 cleaned_count)
{
union ixgbe_adv_rx_desc *rx_desc;
struct ixgbe_rx_buffer *bi;
@@ -322,7 +294,7 @@ __ixgbe_alloc_rx_buffers_zc(struct ixgbe_ring *rx_ring, u16 cleaned_count,
i -= rx_ring->count;
do {
- if (!alloc(rx_ring, bi)) {
+ if (!ixgbe_alloc_buffer_zc(rx_ring, bi)) {
ok = false;
break;
}
@@ -373,19 +345,6 @@ __ixgbe_alloc_rx_buffers_zc(struct ixgbe_ring *rx_ring, u16 cleaned_count,
return ok;
}
-void ixgbe_alloc_rx_buffers_zc(struct ixgbe_ring *rx_ring, u16 count)
-{
- __ixgbe_alloc_rx_buffers_zc(rx_ring, count,
- ixgbe_alloc_buffer_slow_zc);
-}
-
-static bool ixgbe_alloc_rx_buffers_fast_zc(struct ixgbe_ring *rx_ring,
- u16 count)
-{
- return __ixgbe_alloc_rx_buffers_zc(rx_ring, count,
- ixgbe_alloc_buffer_zc);
-}
-
static struct sk_buff *ixgbe_construct_skb_zc(struct ixgbe_ring *rx_ring,
struct ixgbe_rx_buffer *bi,
struct xdp_buff *xdp)
@@ -441,8 +400,8 @@ int ixgbe_clean_rx_irq_zc(struct ixgbe_q_vector *q_vector,
/* return some buffers to hardware, one at a time is too slow */
if (cleaned_count >= IXGBE_RX_BUFFER_WRITE) {
failure = failure ||
- !ixgbe_alloc_rx_buffers_fast_zc(rx_ring,
- cleaned_count);
+ !ixgbe_alloc_rx_buffers_zc(rx_ring,
+ cleaned_count);
cleaned_count = 0;
}
--
2.17.1
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