diff options
Diffstat (limited to 'drivers/net/ixgbe/ixgbe_fcoe.c')
| -rw-r--r-- | drivers/net/ixgbe/ixgbe_fcoe.c | 53 |
1 files changed, 51 insertions, 2 deletions
diff --git a/drivers/net/ixgbe/ixgbe_fcoe.c b/drivers/net/ixgbe/ixgbe_fcoe.c index 6342d48..c54a882 100644 --- a/drivers/net/ixgbe/ixgbe_fcoe.c +++ b/drivers/net/ixgbe/ixgbe_fcoe.c @@ -159,13 +159,13 @@ int ixgbe_fcoe_ddp_get(struct net_device *netdev, u16 xid, struct scatterlist *sg; unsigned int i, j, dmacount; unsigned int len; - static const unsigned int bufflen = 4096; + static const unsigned int bufflen = IXGBE_FCBUFF_MIN; unsigned int firstoff = 0; unsigned int lastsize; unsigned int thisoff = 0; unsigned int thislen = 0; u32 fcbuff, fcdmarw, fcfltrw; - dma_addr_t addr; + dma_addr_t addr = 0; if (!netdev || !sgl) return 0; @@ -254,6 +254,24 @@ int ixgbe_fcoe_ddp_get(struct net_device *netdev, u16 xid, /* only the last buffer may have non-full bufflen */ lastsize = thisoff + thislen; + /* + * lastsize can not be buffer len. + * If it is then adding another buffer with lastsize = 1. + */ + if (lastsize == bufflen) { + if (j >= IXGBE_BUFFCNT_MAX) { + e_err(drv, "xid=%x:%d,%d,%d:addr=%llx " + "not enough user buffers. We need an extra " + "buffer because lastsize is bufflen.\n", + xid, i, j, dmacount, (u64)addr); + goto out_noddp_free; + } + + ddp->udl[j] = (u64)(fcoe->extra_ddp_buffer_dma); + j++; + lastsize = 1; + } + fcbuff = (IXGBE_FCBUFF_4KB << IXGBE_FCBUFF_BUFFSIZE_SHIFT); fcbuff |= ((j & 0xff) << IXGBE_FCBUFF_BUFFCNT_SHIFT); fcbuff |= (firstoff << IXGBE_FCBUFF_OFFSET_SHIFT); @@ -532,6 +550,24 @@ void ixgbe_configure_fcoe(struct ixgbe_adapter *adapter) e_err(drv, "failed to allocated FCoE DDP pool\n"); spin_lock_init(&fcoe->lock); + + /* Extra buffer to be shared by all DDPs for HW work around */ + fcoe->extra_ddp_buffer = kmalloc(IXGBE_FCBUFF_MIN, GFP_ATOMIC); + if (fcoe->extra_ddp_buffer == NULL) { + e_err(drv, "failed to allocated extra DDP buffer\n"); + goto out_extra_ddp_buffer_alloc; + } + + fcoe->extra_ddp_buffer_dma = + dma_map_single(&adapter->pdev->dev, + fcoe->extra_ddp_buffer, + IXGBE_FCBUFF_MIN, + DMA_FROM_DEVICE); + if (dma_mapping_error(&adapter->pdev->dev, + fcoe->extra_ddp_buffer_dma)) { + e_err(drv, "failed to map extra DDP buffer\n"); + goto out_extra_ddp_buffer_dma; + } } /* Enable L2 eth type filter for FCoE */ @@ -581,6 +617,14 @@ void ixgbe_configure_fcoe(struct ixgbe_adapter *adapter) } } #endif + + return; + +out_extra_ddp_buffer_dma: + kfree(fcoe->extra_ddp_buffer); +out_extra_ddp_buffer_alloc: + pci_pool_destroy(fcoe->pool); + fcoe->pool = NULL; } /** @@ -600,6 +644,11 @@ void ixgbe_cleanup_fcoe(struct ixgbe_adapter *adapter) if (fcoe->pool) { for (i = 0; i < IXGBE_FCOE_DDP_MAX; i++) ixgbe_fcoe_ddp_put(adapter->netdev, i); + dma_unmap_single(&adapter->pdev->dev, + fcoe->extra_ddp_buffer_dma, + IXGBE_FCBUFF_MIN, + DMA_FROM_DEVICE); + kfree(fcoe->extra_ddp_buffer); pci_pool_destroy(fcoe->pool); fcoe->pool = NULL; } |