diff options
| author | Ben Hutchings <bhutchings@solarflare.com> | 2013-01-08 23:43:19 +0000 |
|---|---|---|
| committer | Ben Hutchings <bhutchings@solarflare.com> | 2013-08-29 18:12:14 +0100 |
| commit | ba8977bdb20d7ae72ec6fddc1c081ca2d56852cb (patch) | |
| tree | 21b65914a3de92f9e69327ce1f7891fa8f39e0f7 /drivers/net | |
| parent | 3881d8ab065b23bb07400aa820e737d80fdaced3 (diff) | |
| download | linux-ba8977bdb20d7ae72ec6fddc1c081ca2d56852cb.tar.bz2 | |
sfc: Extend struct efx_tx_buffer to allow pushing option descriptors
The TX path firmware for EF10 supports 'option descriptors' to control
offloads and various other features. Add a flag and field for these
in struct efx_tx_buffer, and don't treat them as DMA descriptors on
completion.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/ethernet/sfc/farch.c | 2 | ||||
| -rw-r--r-- | drivers/net/ethernet/sfc/net_driver.h | 7 | ||||
| -rw-r--r-- | drivers/net/ethernet/sfc/tx.c | 4 |
3 files changed, 11 insertions, 2 deletions
diff --git a/drivers/net/ethernet/sfc/farch.c b/drivers/net/ethernet/sfc/farch.c index 842f92e45517..65073aac3c80 100644 --- a/drivers/net/ethernet/sfc/farch.c +++ b/drivers/net/ethernet/sfc/farch.c @@ -325,6 +325,8 @@ void efx_farch_tx_write(struct efx_tx_queue *tx_queue) txd = efx_tx_desc(tx_queue, write_ptr); ++tx_queue->write_count; + EFX_BUG_ON_PARANOID(buffer->flags & EFX_TX_BUF_OPTION); + /* Create TX descriptor ring entry */ BUILD_BUG_ON(EFX_TX_BUF_CONT != 1); EFX_POPULATE_QWORD_4(*txd, diff --git a/drivers/net/ethernet/sfc/net_driver.h b/drivers/net/ethernet/sfc/net_driver.h index c9b6f2dcb539..d1aa5dcec963 100644 --- a/drivers/net/ethernet/sfc/net_driver.h +++ b/drivers/net/ethernet/sfc/net_driver.h @@ -135,6 +135,7 @@ struct efx_special_buffer { * freed when descriptor completes * @heap_buf: When @flags & %EFX_TX_BUF_HEAP, the associated heap buffer to be * freed when descriptor completes. + * @option: When @flags & %EFX_TX_BUF_OPTION, a NIC-specific option descriptor. * @dma_addr: DMA address of the fragment. * @flags: Flags for allocation and DMA mapping type * @len: Length of this fragment. @@ -146,7 +147,10 @@ struct efx_tx_buffer { const struct sk_buff *skb; void *heap_buf; }; - dma_addr_t dma_addr; + union { + efx_qword_t option; + dma_addr_t dma_addr; + }; unsigned short flags; unsigned short len; unsigned short unmap_len; @@ -155,6 +159,7 @@ struct efx_tx_buffer { #define EFX_TX_BUF_SKB 2 /* buffer is last part of skb */ #define EFX_TX_BUF_HEAP 4 /* buffer was allocated with kmalloc() */ #define EFX_TX_BUF_MAP_SINGLE 8 /* buffer was mapped with dma_map_single() */ +#define EFX_TX_BUF_OPTION 0x10 /* empty buffer for option descriptor */ /** * struct efx_tx_queue - An Efx TX queue diff --git a/drivers/net/ethernet/sfc/tx.c b/drivers/net/ethernet/sfc/tx.c index 85ee647b28ad..82075f9f02e6 100644 --- a/drivers/net/ethernet/sfc/tx.c +++ b/drivers/net/ethernet/sfc/tx.c @@ -306,7 +306,9 @@ static void efx_dequeue_buffers(struct efx_tx_queue *tx_queue, while (read_ptr != stop_index) { struct efx_tx_buffer *buffer = &tx_queue->buffer[read_ptr]; - if (unlikely(buffer->len == 0)) { + + if (!(buffer->flags & EFX_TX_BUF_OPTION) && + unlikely(buffer->len == 0)) { netif_err(efx, tx_err, efx->net_dev, "TX queue %d spurious TX completion id %x\n", tx_queue->queue, read_ptr); |