From: Shinas Rasheed <srasheed@marvell.com>
To: <srasheed@marvell.com>
Cc: <aayarekar@marvell.com>, <davem@davemloft.net>,
<edumazet@google.com>, <egallen@redhat.com>, <hgani@marvell.com>,
<horms@kernel.org>, <kuba@kernel.org>,
<linux-kernel@vger.kernel.org>, <mschmidt@redhat.com>,
<netdev@vger.kernel.org>, <pabeni@redhat.com>,
<sburla@marvell.com>, <sedara@marvell.com>, <vburru@marvell.com>,
<vimleshk@marvell.com>
Subject: [net PATCH v2] octeon_ep: fix tx dma unmap len values in SG
Date: Wed, 13 Sep 2023 01:41:56 -0700 [thread overview]
Message-ID: <20230913084156.2147106-1-srasheed@marvell.com> (raw)
In-Reply-To: <PH0PR18MB47346CADA6D087CB1BF2234CC7F0A@PH0PR18MB4734.namprd18.prod.outlook.com>
Lengths of SG pointers are kept in the following order in
the SG entries in hardware.
63 48|47 32|31 16|15 0
-----------------------------------------
| Len 0 | Len 1 | Len 2 | Len 3 |
-----------------------------------------
| Ptr 0 |
-----------------------------------------
| Ptr 1 |
-----------------------------------------
| Ptr 2 |
-----------------------------------------
| Ptr 3 |
-----------------------------------------
Dma pointers have to be unmapped based on their
respective lengths given in this format.
Fixes: 37d79d059606 ("octeon_ep: add Tx/Rx processing and interrupt support")
Signed-off-by: Shinas Rasheed <srasheed@marvell.com>
---
.../net/ethernet/marvell/octeon_ep/octep_main.c | 8 ++++----
.../net/ethernet/marvell/octeon_ep/octep_tx.c | 8 ++++----
.../net/ethernet/marvell/octeon_ep/octep_tx.h | 16 +++++++++++++++-
3 files changed, 23 insertions(+), 9 deletions(-)
diff --git a/drivers/net/ethernet/marvell/octeon_ep/octep_main.c b/drivers/net/ethernet/marvell/octeon_ep/octep_main.c
index 4424de2ffd70..dbc518ff8276 100644
--- a/drivers/net/ethernet/marvell/octeon_ep/octep_main.c
+++ b/drivers/net/ethernet/marvell/octeon_ep/octep_main.c
@@ -734,13 +734,13 @@ static netdev_tx_t octep_start_xmit(struct sk_buff *skb,
dma_map_sg_err:
if (si > 0) {
dma_unmap_single(iq->dev, sglist[0].dma_ptr[0],
- sglist[0].len[0], DMA_TO_DEVICE);
- sglist[0].len[0] = 0;
+ sglist[0].len[3], DMA_TO_DEVICE);
+ sglist[0].len[3] = 0;
}
while (si > 1) {
dma_unmap_page(iq->dev, sglist[si >> 2].dma_ptr[si & 3],
- sglist[si >> 2].len[si & 3], DMA_TO_DEVICE);
- sglist[si >> 2].len[si & 3] = 0;
+ sglist[si >> 2].len[3 - (si & 3)], DMA_TO_DEVICE);
+ sglist[si >> 2].len[3 - (si & 3)] = 0;
si--;
}
tx_buffer->gather = 0;
diff --git a/drivers/net/ethernet/marvell/octeon_ep/octep_tx.c b/drivers/net/ethernet/marvell/octeon_ep/octep_tx.c
index 5a520d37bea0..d0adb82d65c3 100644
--- a/drivers/net/ethernet/marvell/octeon_ep/octep_tx.c
+++ b/drivers/net/ethernet/marvell/octeon_ep/octep_tx.c
@@ -69,12 +69,12 @@ int octep_iq_process_completions(struct octep_iq *iq, u16 budget)
compl_sg++;
dma_unmap_single(iq->dev, tx_buffer->sglist[0].dma_ptr[0],
- tx_buffer->sglist[0].len[0], DMA_TO_DEVICE);
+ tx_buffer->sglist[0].len[3], DMA_TO_DEVICE);
i = 1; /* entry 0 is main skb, unmapped above */
while (frags--) {
dma_unmap_page(iq->dev, tx_buffer->sglist[i >> 2].dma_ptr[i & 3],
- tx_buffer->sglist[i >> 2].len[i & 3], DMA_TO_DEVICE);
+ tx_buffer->sglist[i >> 2].len[3 - (i & 3)], DMA_TO_DEVICE);
i++;
}
@@ -131,13 +131,13 @@ static void octep_iq_free_pending(struct octep_iq *iq)
dma_unmap_single(iq->dev,
tx_buffer->sglist[0].dma_ptr[0],
- tx_buffer->sglist[0].len[0],
+ tx_buffer->sglist[0].len[3],
DMA_TO_DEVICE);
i = 1; /* entry 0 is main skb, unmapped above */
while (frags--) {
dma_unmap_page(iq->dev, tx_buffer->sglist[i >> 2].dma_ptr[i & 3],
- tx_buffer->sglist[i >> 2].len[i & 3], DMA_TO_DEVICE);
+ tx_buffer->sglist[i >> 2].len[3 - (i & 3)], DMA_TO_DEVICE);
i++;
}
diff --git a/drivers/net/ethernet/marvell/octeon_ep/octep_tx.h b/drivers/net/ethernet/marvell/octeon_ep/octep_tx.h
index 2ef57980eb47..21e75ff9f5e7 100644
--- a/drivers/net/ethernet/marvell/octeon_ep/octep_tx.h
+++ b/drivers/net/ethernet/marvell/octeon_ep/octep_tx.h
@@ -17,7 +17,21 @@
#define TX_BUFTYPE_NET_SG 2
#define NUM_TX_BUFTYPES 3
-/* Hardware format for Scatter/Gather list */
+/* Hardware format for Scatter/Gather list
+ *
+ * 63 48|47 32|31 16|15 0
+ * -----------------------------------------
+ * | Len 0 | Len 1 | Len 2 | Len 3 |
+ * -----------------------------------------
+ * | Ptr 0 |
+ * -----------------------------------------
+ * | Ptr 1 |
+ * -----------------------------------------
+ * | Ptr 2 |
+ * -----------------------------------------
+ * | Ptr 3 |
+ * -----------------------------------------
+ */
struct octep_tx_sglist_desc {
u16 len[4];
dma_addr_t dma_ptr[4];
--
2.25.1
next prev parent reply other threads:[~2023-09-13 8:42 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-11 9:23 [net PATCH] " Shinas Rasheed
2023-09-11 18:01 ` Simon Horman
2023-09-12 7:04 ` Shinas Rasheed
2023-09-12 8:45 ` Paolo Abeni
2023-09-13 5:49 ` [EXT] " Shinas Rasheed
2023-09-13 8:41 ` Shinas Rasheed [this message]
2023-09-14 10:57 ` [net PATCH v2] " Simon Horman
2023-09-15 13:00 ` patchwork-bot+netdevbpf
[not found] ` <PH0PR18MB473404EA35ADAC222C9EB68FC7F1A@PH0PR18MB4734.namprd18.prod.outlook.com>
2023-09-12 19:45 ` [EXT] Re: [net PATCH] " Simon Horman
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