summaryrefslogtreecommitdiffstats
path: root/drivers/dma
diff options
context:
space:
mode:
authorDan Williams <dan.j.williams@intel.com>2009-09-08 17:43:02 -0700
committerDan Williams <dan.j.williams@intel.com>2009-09-08 17:43:02 -0700
commite3232714d465c42ac631929b990f5e35e2d8a955 (patch)
treef6b9fe66bd11cdae420f558bebf7e8d4b89b52b4 /drivers/dma
parentb265b11fc1a0bd6ae5a7fde12e374583a52ab326 (diff)
downloadlinux-e3232714d465c42ac631929b990f5e35e2d8a955.tar.gz
linux-e3232714d465c42ac631929b990f5e35e2d8a955.tar.bz2
linux-e3232714d465c42ac631929b990f5e35e2d8a955.zip
ioat3: segregate raid engines
The cleanup routine for the raid cases imposes extra checks for handling raid descriptors and extended descriptors. If the channel does not support raid it can avoid this extra overhead by using the ioat2 cleanup path. Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/dma')
-rw-r--r--drivers/dma/ioat/dma_v2.c4
-rw-r--r--drivers/dma/ioat/dma_v2.h2
-rw-r--r--drivers/dma/ioat/dma_v3.c25
3 files changed, 22 insertions, 9 deletions
diff --git a/drivers/dma/ioat/dma_v2.c b/drivers/dma/ioat/dma_v2.c
index 12c64e1a7e31..7bbbd83d12e6 100644
--- a/drivers/dma/ioat/dma_v2.c
+++ b/drivers/dma/ioat/dma_v2.c
@@ -206,7 +206,7 @@ static void ioat2_cleanup(struct ioat2_dma_chan *ioat)
spin_unlock_bh(&chan->cleanup_lock);
}
-static void ioat2_cleanup_tasklet(unsigned long data)
+void ioat2_cleanup_tasklet(unsigned long data)
{
struct ioat2_dma_chan *ioat = (void *) data;
@@ -258,7 +258,7 @@ static void ioat2_restart_channel(struct ioat2_dma_chan *ioat)
__ioat2_restart_chan(ioat);
}
-static void ioat2_timer_event(unsigned long data)
+void ioat2_timer_event(unsigned long data)
{
struct ioat2_dma_chan *ioat = (void *) data;
struct ioat_chan_common *chan = &ioat->base;
diff --git a/drivers/dma/ioat/dma_v2.h b/drivers/dma/ioat/dma_v2.h
index e23027d3dcbd..246e646b1904 100644
--- a/drivers/dma/ioat/dma_v2.h
+++ b/drivers/dma/ioat/dma_v2.h
@@ -183,5 +183,7 @@ enum dma_status ioat2_is_complete(struct dma_chan *c, dma_cookie_t cookie,
void __ioat2_restart_chan(struct ioat2_dma_chan *ioat);
bool reshape_ring(struct ioat2_dma_chan *ioat, int order);
void __ioat2_issue_pending(struct ioat2_dma_chan *ioat);
+void ioat2_cleanup_tasklet(unsigned long data);
+void ioat2_timer_event(unsigned long data);
extern struct kobj_type ioat2_ktype;
#endif /* IOATDMA_V2_H */
diff --git a/drivers/dma/ioat/dma_v3.c b/drivers/dma/ioat/dma_v3.c
index ff4afdc8e59b..3686dddf6bff 100644
--- a/drivers/dma/ioat/dma_v3.c
+++ b/drivers/dma/ioat/dma_v3.c
@@ -1117,30 +1117,25 @@ int __devinit ioat3_dma_probe(struct ioatdma_device *device, int dca)
struct dma_device *dma;
struct dma_chan *c;
struct ioat_chan_common *chan;
+ bool is_raid_device = false;
int err;
u16 dev_id;
u32 cap;
device->enumerate_channels = ioat2_enumerate_channels;
- device->cleanup_tasklet = ioat3_cleanup_tasklet;
- device->timer_fn = ioat3_timer_event;
device->self_test = ioat3_dma_self_test;
dma = &device->common;
dma->device_prep_dma_memcpy = ioat2_dma_prep_memcpy_lock;
dma->device_issue_pending = ioat2_issue_pending;
dma->device_alloc_chan_resources = ioat2_alloc_chan_resources;
dma->device_free_chan_resources = ioat2_free_chan_resources;
- dma->device_is_tx_complete = ioat3_is_complete;
dma_cap_set(DMA_INTERRUPT, dma->cap_mask);
dma->device_prep_dma_interrupt = ioat3_prep_interrupt_lock;
cap = readl(device->reg_base + IOAT_DMA_CAP_OFFSET);
- if (cap & IOAT_CAP_FILL_BLOCK) {
- dma_cap_set(DMA_MEMSET, dma->cap_mask);
- dma->device_prep_dma_memset = ioat3_prep_memset_lock;
- }
if (cap & IOAT_CAP_XOR) {
+ is_raid_device = true;
dma->max_xor = 8;
dma->xor_align = 2;
@@ -1151,6 +1146,7 @@ int __devinit ioat3_dma_probe(struct ioatdma_device *device, int dca)
dma->device_prep_dma_xor_val = ioat3_prep_xor_val;
}
if (cap & IOAT_CAP_PQ) {
+ is_raid_device = true;
dma_set_maxpq(dma, 8, 0);
dma->pq_align = 2;
@@ -1171,6 +1167,21 @@ int __devinit ioat3_dma_probe(struct ioatdma_device *device, int dca)
dma->device_prep_dma_xor_val = ioat3_prep_pqxor_val;
}
}
+ if (is_raid_device && (cap & IOAT_CAP_FILL_BLOCK)) {
+ dma_cap_set(DMA_MEMSET, dma->cap_mask);
+ dma->device_prep_dma_memset = ioat3_prep_memset_lock;
+ }
+
+
+ if (is_raid_device) {
+ dma->device_is_tx_complete = ioat3_is_complete;
+ device->cleanup_tasklet = ioat3_cleanup_tasklet;
+ device->timer_fn = ioat3_timer_event;
+ } else {
+ dma->device_is_tx_complete = ioat2_is_complete;
+ device->cleanup_tasklet = ioat2_cleanup_tasklet;
+ device->timer_fn = ioat2_timer_event;
+ }
/* -= IOAT ver.3 workarounds =- */
/* Write CHANERRMSK_INT with 3E07h to mask out the errors