diff options
| author | Ben Hutchings <bhutchings@solarflare.com> | 2008-09-01 11:46:43 (GMT) |
|---|---|---|
| committer | Jeff Garzik <jgarzik@redhat.com> | 2008-09-03 13:53:44 (GMT) |
| commit | cc12dac2e512c2b6185ed91899e09e9910630315 (patch) | |
| tree | 4f44217788642343ad4dc0d17001ce8259bb39d8 /drivers/net/sfc | |
| parent | ecbd95c17c221913cc3c5776051b2fa8b3b97316 (diff) | |
| download | linux-cc12dac2e512c2b6185ed91899e09e9910630315.tar.xz | |
sfc: Reduce the size of struct efx_tx_buffer
Remove unmap_addr since it can be calculated from dma_addr, len and
unmap_len. This saves 4-16 bytes.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'drivers/net/sfc')
| -rw-r--r-- | drivers/net/sfc/net_driver.h | 2 | ||||
| -rw-r--r-- | drivers/net/sfc/tx.c | 20 |
2 files changed, 11 insertions, 11 deletions
diff --git a/drivers/net/sfc/net_driver.h b/drivers/net/sfc/net_driver.h index f539e2e..6369f92 100644 --- a/drivers/net/sfc/net_driver.h +++ b/drivers/net/sfc/net_driver.h @@ -130,7 +130,6 @@ struct efx_special_buffer { * This field is zero when the queue slot is empty. * @continuation: True if this fragment is not the end of a packet. * @unmap_single: True if pci_unmap_single should be used. - * @unmap_addr: DMA address to unmap * @unmap_len: Length of this fragment to unmap */ struct efx_tx_buffer { @@ -140,7 +139,6 @@ struct efx_tx_buffer { unsigned short len; unsigned char continuation; unsigned char unmap_single; - dma_addr_t unmap_addr; unsigned short unmap_len; }; diff --git a/drivers/net/sfc/tx.c b/drivers/net/sfc/tx.c index 1112775..5f01371 100644 --- a/drivers/net/sfc/tx.c +++ b/drivers/net/sfc/tx.c @@ -64,12 +64,14 @@ static inline void efx_dequeue_buffer(struct efx_tx_queue *tx_queue, { if (buffer->unmap_len) { struct pci_dev *pci_dev = tx_queue->efx->pci_dev; + dma_addr_t unmap_addr = (buffer->dma_addr + buffer->len - + buffer->unmap_len); if (buffer->unmap_single) - pci_unmap_single(pci_dev, buffer->unmap_addr, - buffer->unmap_len, PCI_DMA_TODEVICE); + pci_unmap_single(pci_dev, unmap_addr, buffer->unmap_len, + PCI_DMA_TODEVICE); else - pci_unmap_page(pci_dev, buffer->unmap_addr, - buffer->unmap_len, PCI_DMA_TODEVICE); + pci_unmap_page(pci_dev, unmap_addr, buffer->unmap_len, + PCI_DMA_TODEVICE); buffer->unmap_len = 0; buffer->unmap_single = 0; } @@ -233,7 +235,6 @@ static inline int efx_enqueue_skb(struct efx_tx_queue *tx_queue, } while (len); /* Transfer ownership of the unmapping to the final buffer */ - buffer->unmap_addr = unmap_addr; buffer->unmap_single = unmap_single; buffer->unmap_len = unmap_len; unmap_len = 0; @@ -805,6 +806,7 @@ static inline void efx_tso_put_header(struct efx_tx_queue *tx_queue, static void efx_enqueue_unwind(struct efx_tx_queue *tx_queue) { struct efx_tx_buffer *buffer; + dma_addr_t unmap_addr; /* Work backwards until we hit the original insert pointer value */ while (tx_queue->insert_count != tx_queue->write_count) { @@ -816,15 +818,15 @@ static void efx_enqueue_unwind(struct efx_tx_queue *tx_queue) buffer->len = 0; buffer->continuation = 1; if (buffer->unmap_len) { + unmap_addr = (buffer->dma_addr + buffer->len - + buffer->unmap_len); if (buffer->unmap_single) pci_unmap_single(tx_queue->efx->pci_dev, - buffer->unmap_addr, - buffer->unmap_len, + unmap_addr, buffer->unmap_len, PCI_DMA_TODEVICE); else pci_unmap_page(tx_queue->efx->pci_dev, - buffer->unmap_addr, - buffer->unmap_len, + unmap_addr, buffer->unmap_len, PCI_DMA_TODEVICE); buffer->unmap_len = 0; } |