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path: root/drivers/dma/ioat
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Diffstat (limited to 'drivers/dma/ioat')
-rw-r--r--drivers/dma/ioat/dma.c85
-rw-r--r--drivers/dma/ioat/dma.h10
-rw-r--r--drivers/dma/ioat/init.c2
3 files changed, 55 insertions, 42 deletions
diff --git a/drivers/dma/ioat/dma.c b/drivers/dma/ioat/dma.c
index 18c011e57592..8ad0ad861c86 100644
--- a/drivers/dma/ioat/dma.c
+++ b/drivers/dma/ioat/dma.c
@@ -332,8 +332,8 @@ ioat_alloc_ring_ent(struct dma_chan *chan, int idx, gfp_t flags)
u8 *pos;
off_t offs;
- chunk = idx / IOAT_DESCS_PER_2M;
- idx &= (IOAT_DESCS_PER_2M - 1);
+ chunk = idx / IOAT_DESCS_PER_CHUNK;
+ idx &= (IOAT_DESCS_PER_CHUNK - 1);
offs = idx * IOAT_DESC_SZ;
pos = (u8 *)ioat_chan->descs[chunk].virt + offs;
phys = ioat_chan->descs[chunk].hw + offs;
@@ -370,7 +370,8 @@ ioat_alloc_ring(struct dma_chan *c, int order, gfp_t flags)
if (!ring)
return NULL;
- ioat_chan->desc_chunks = chunks = (total_descs * IOAT_DESC_SZ) / SZ_2M;
+ chunks = (total_descs * IOAT_DESC_SZ) / IOAT_CHUNK_SIZE;
+ ioat_chan->desc_chunks = chunks;
for (i = 0; i < chunks; i++) {
struct ioat_descs *descs = &ioat_chan->descs[i];
@@ -382,8 +383,9 @@ ioat_alloc_ring(struct dma_chan *c, int order, gfp_t flags)
for (idx = 0; idx < i; idx++) {
descs = &ioat_chan->descs[idx];
- dma_free_coherent(to_dev(ioat_chan), SZ_2M,
- descs->virt, descs->hw);
+ dma_free_coherent(to_dev(ioat_chan),
+ IOAT_CHUNK_SIZE,
+ descs->virt, descs->hw);
descs->virt = NULL;
descs->hw = 0;
}
@@ -404,7 +406,7 @@ ioat_alloc_ring(struct dma_chan *c, int order, gfp_t flags)
for (idx = 0; idx < ioat_chan->desc_chunks; idx++) {
dma_free_coherent(to_dev(ioat_chan),
- SZ_2M,
+ IOAT_CHUNK_SIZE,
ioat_chan->descs[idx].virt,
ioat_chan->descs[idx].hw);
ioat_chan->descs[idx].virt = NULL;
@@ -867,6 +869,23 @@ static void check_active(struct ioatdma_chan *ioat_chan)
mod_timer(&ioat_chan->timer, jiffies + IDLE_TIMEOUT);
}
+static void ioat_reboot_chan(struct ioatdma_chan *ioat_chan)
+{
+ spin_lock_bh(&ioat_chan->prep_lock);
+ set_bit(IOAT_CHAN_DOWN, &ioat_chan->state);
+ spin_unlock_bh(&ioat_chan->prep_lock);
+
+ ioat_abort_descs(ioat_chan);
+ dev_warn(to_dev(ioat_chan), "Reset channel...\n");
+ ioat_reset_hw(ioat_chan);
+ dev_warn(to_dev(ioat_chan), "Restart channel...\n");
+ ioat_restart_channel(ioat_chan);
+
+ spin_lock_bh(&ioat_chan->prep_lock);
+ clear_bit(IOAT_CHAN_DOWN, &ioat_chan->state);
+ spin_unlock_bh(&ioat_chan->prep_lock);
+}
+
void ioat_timer_event(struct timer_list *t)
{
struct ioatdma_chan *ioat_chan = from_timer(ioat_chan, t, timer);
@@ -889,19 +908,7 @@ void ioat_timer_event(struct timer_list *t)
if (test_bit(IOAT_RUN, &ioat_chan->state)) {
spin_lock_bh(&ioat_chan->cleanup_lock);
- spin_lock_bh(&ioat_chan->prep_lock);
- set_bit(IOAT_CHAN_DOWN, &ioat_chan->state);
- spin_unlock_bh(&ioat_chan->prep_lock);
-
- ioat_abort_descs(ioat_chan);
- dev_warn(to_dev(ioat_chan), "Reset channel...\n");
- ioat_reset_hw(ioat_chan);
- dev_warn(to_dev(ioat_chan), "Restart channel...\n");
- ioat_restart_channel(ioat_chan);
-
- spin_lock_bh(&ioat_chan->prep_lock);
- clear_bit(IOAT_CHAN_DOWN, &ioat_chan->state);
- spin_unlock_bh(&ioat_chan->prep_lock);
+ ioat_reboot_chan(ioat_chan);
spin_unlock_bh(&ioat_chan->cleanup_lock);
}
@@ -915,17 +922,23 @@ void ioat_timer_event(struct timer_list *t)
spin_lock_bh(&ioat_chan->prep_lock);
check_active(ioat_chan);
spin_unlock_bh(&ioat_chan->prep_lock);
- spin_unlock_bh(&ioat_chan->cleanup_lock);
- return;
+ goto unlock_out;
+ }
+
+ /* handle the missed cleanup case */
+ if (ioat_cleanup_preamble(ioat_chan, &phys_complete)) {
+ /* timer restarted in ioat_cleanup_preamble
+ * and IOAT_COMPLETION_ACK cleared
+ */
+ __cleanup(ioat_chan, phys_complete);
+ goto unlock_out;
}
/* if we haven't made progress and we have already
* acknowledged a pending completion once, then be more
* forceful with a restart
*/
- if (ioat_cleanup_preamble(ioat_chan, &phys_complete))
- __cleanup(ioat_chan, phys_complete);
- else if (test_bit(IOAT_COMPLETION_ACK, &ioat_chan->state)) {
+ if (test_bit(IOAT_COMPLETION_ACK, &ioat_chan->state)) {
u32 chanerr;
chanerr = readl(ioat_chan->reg_base + IOAT_CHANERR_OFFSET);
@@ -937,25 +950,23 @@ void ioat_timer_event(struct timer_list *t)
dev_dbg(to_dev(ioat_chan), "Active descriptors: %d\n",
ioat_ring_active(ioat_chan));
- spin_lock_bh(&ioat_chan->prep_lock);
- set_bit(IOAT_CHAN_DOWN, &ioat_chan->state);
- spin_unlock_bh(&ioat_chan->prep_lock);
+ ioat_reboot_chan(ioat_chan);
- ioat_abort_descs(ioat_chan);
- dev_warn(to_dev(ioat_chan), "Resetting channel...\n");
- ioat_reset_hw(ioat_chan);
- dev_warn(to_dev(ioat_chan), "Restarting channel...\n");
- ioat_restart_channel(ioat_chan);
+ goto unlock_out;
+ }
+ /* handle missed issue pending case */
+ if (ioat_ring_pending(ioat_chan)) {
+ dev_warn(to_dev(ioat_chan),
+ "Completion timeout with pending descriptors\n");
spin_lock_bh(&ioat_chan->prep_lock);
- clear_bit(IOAT_CHAN_DOWN, &ioat_chan->state);
+ __ioat_issue_pending(ioat_chan);
spin_unlock_bh(&ioat_chan->prep_lock);
- spin_unlock_bh(&ioat_chan->cleanup_lock);
- return;
- } else
- set_bit(IOAT_COMPLETION_ACK, &ioat_chan->state);
+ }
+ set_bit(IOAT_COMPLETION_ACK, &ioat_chan->state);
mod_timer(&ioat_chan->timer, jiffies + COMPLETION_TIMEOUT);
+unlock_out:
spin_unlock_bh(&ioat_chan->cleanup_lock);
}
diff --git a/drivers/dma/ioat/dma.h b/drivers/dma/ioat/dma.h
index b8e8e0b9693c..e6b622e1ba92 100644
--- a/drivers/dma/ioat/dma.h
+++ b/drivers/dma/ioat/dma.h
@@ -81,6 +81,11 @@ struct ioatdma_device {
u32 msixpba;
};
+#define IOAT_MAX_ORDER 16
+#define IOAT_MAX_DESCS (1 << IOAT_MAX_ORDER)
+#define IOAT_CHUNK_SIZE (SZ_512K)
+#define IOAT_DESCS_PER_CHUNK (IOAT_CHUNK_SIZE / IOAT_DESC_SZ)
+
struct ioat_descs {
void *virt;
dma_addr_t hw;
@@ -128,7 +133,7 @@ struct ioatdma_chan {
u16 produce;
struct ioat_ring_ent **ring;
spinlock_t prep_lock;
- struct ioat_descs descs[2];
+ struct ioat_descs descs[IOAT_MAX_DESCS / IOAT_DESCS_PER_CHUNK];
int desc_chunks;
int intr_coalesce;
int prev_intr_coalesce;
@@ -301,9 +306,6 @@ static inline bool is_ioat_bug(unsigned long err)
return !!err;
}
-#define IOAT_MAX_ORDER 16
-#define IOAT_MAX_DESCS 65536
-#define IOAT_DESCS_PER_2M 32768
static inline u32 ioat_ring_size(struct ioatdma_chan *ioat_chan)
{
diff --git a/drivers/dma/ioat/init.c b/drivers/dma/ioat/init.c
index 60e9afbb896c..58d13564f88b 100644
--- a/drivers/dma/ioat/init.c
+++ b/drivers/dma/ioat/init.c
@@ -651,7 +651,7 @@ static void ioat_free_chan_resources(struct dma_chan *c)
}
for (i = 0; i < ioat_chan->desc_chunks; i++) {
- dma_free_coherent(to_dev(ioat_chan), SZ_2M,
+ dma_free_coherent(to_dev(ioat_chan), IOAT_CHUNK_SIZE,
ioat_chan->descs[i].virt,
ioat_chan->descs[i].hw);
ioat_chan->descs[i].virt = NULL;
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-18 06:44:12 +0000