diff options
| author | Brice Goglin <Brice.Goglin@inria.fr> | 2013-08-02 21:18:03 +0200 |
|---|---|---|
| committer | Dan Williams <djbw@fb.com> | 2013-08-23 07:57:39 +0200 |
| commit | c4dcf0e2dd7e06db0c5c3f396b2e2b9ce1f6d19f (patch) | |
| tree | 8a3d52af6e05bfe2703188a71c8c01b9bc4ba95f | |
| parent | mv_xor: support big endian systems using descriptor swap feature (diff) | |
| download | linux-c4dcf0e2dd7e06db0c5c3f396b2e2b9ce1f6d19f.tar.xz linux-c4dcf0e2dd7e06db0c5c3f396b2e2b9ce1f6d19f.zip | |
ioatdma: disable RAID on non-Atom platforms and reenable unaligned copies
Disable RAID on non-Atom platform and remove related fixups such as the
64-byte alignement restriction on legacy DMA operations (introduced in
commit f26df1a1 as a workaround for silicon errata).
Signed-off-by: Brice Goglin <Brice.Goglin@inria.fr>
Acked-by: Dave Jiang <dave.jiang@intel.com>
Acked-by: Jon Mason <jon.mason@intel.com>
Signed-off-by: Dan Williams <djbw@fb.com>
| -rw-r--r-- | drivers/dma/ioat/dma_v3.c | 24 |
1 files changed, 1 insertions, 23 deletions
diff --git a/drivers/dma/ioat/dma_v3.c b/drivers/dma/ioat/dma_v3.c index b642e035579b..c94e0d210667 100644 --- a/drivers/dma/ioat/dma_v3.c +++ b/drivers/dma/ioat/dma_v3.c @@ -1775,15 +1775,12 @@ int ioat3_dma_probe(struct ioatdma_device *device, int dca) dma->device_alloc_chan_resources = ioat2_alloc_chan_resources; dma->device_free_chan_resources = ioat2_free_chan_resources; - if (is_xeon_cb32(pdev)) - dma->copy_align = 6; - dma_cap_set(DMA_INTERRUPT, dma->cap_mask); dma->device_prep_dma_interrupt = ioat3_prep_interrupt_lock; device->cap = readl(device->reg_base + IOAT_DMA_CAP_OFFSET); - if (is_bwd_noraid(pdev)) + if (is_xeon_cb32(pdev) || is_bwd_noraid(pdev)) device->cap &= ~(IOAT_CAP_XOR | IOAT_CAP_PQ | IOAT_CAP_RAID16SS); /* dca is incompatible with raid operations */ @@ -1793,7 +1790,6 @@ int ioat3_dma_probe(struct ioatdma_device *device, int dca) if (device->cap & IOAT_CAP_XOR) { is_raid_device = true; dma->max_xor = 8; - dma->xor_align = 6; dma_cap_set(DMA_XOR, dma->cap_mask); dma->device_prep_dma_xor = ioat3_prep_xor; @@ -1812,13 +1808,8 @@ int ioat3_dma_probe(struct ioatdma_device *device, int dca) if (device->cap & IOAT_CAP_RAID16SS) { dma_set_maxpq(dma, 16, 0); - dma->pq_align = 0; } else { dma_set_maxpq(dma, 8, 0); - if (is_xeon_cb32(pdev)) - dma->pq_align = 6; - else - dma->pq_align = 0; } if (!(device->cap & IOAT_CAP_XOR)) { @@ -1829,13 +1820,8 @@ int ioat3_dma_probe(struct ioatdma_device *device, int dca) if (device->cap & IOAT_CAP_RAID16SS) { dma->max_xor = 16; - dma->xor_align = 0; } else { dma->max_xor = 8; - if (is_xeon_cb32(pdev)) - dma->xor_align = 6; - else - dma->xor_align = 0; } } } @@ -1844,14 +1830,6 @@ int ioat3_dma_probe(struct ioatdma_device *device, int dca) device->cleanup_fn = ioat3_cleanup_event; device->timer_fn = ioat3_timer_event; - if (is_xeon_cb32(pdev)) { - dma_cap_clear(DMA_XOR_VAL, dma->cap_mask); - dma->device_prep_dma_xor_val = NULL; - - dma_cap_clear(DMA_PQ_VAL, dma->cap_mask); - dma->device_prep_dma_pq_val = NULL; - } - /* starting with CB3.3 super extended descriptors are supported */ if (device->cap & IOAT_CAP_RAID16SS) { char pool_name[14]; |