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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>
This commit is contained in:
Brice Goglin 2013-08-02 21:18:03 +02:00 committed by Dan Williams
parent e03bc654f8
commit c4dcf0e2dd
1 changed files with 1 additions and 23 deletions
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24
drivers/dma/ioat/dma_v3.c
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@ -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];