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habanalabs: cap simulator timeout 

In the driver timeout functions, we give the simulator a factor of 10
in the timeout. This was necessary when the requested timeout is small
but if it was a few seconds, this can result in a very large timeout which
is unnecessary.

This patch caps the maximum timeout of the simulator to 10 seconds, which
is our largest timeout in the code. That is more then enough for anything
the simulator is doing.

Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
Reviewed-by: Omer Shpigelman <oshpigelman@habana.ai>
This commit is contained in:
Oded Gabbay 2019-07-18 11:14:37 +03:00
parent 52a1ae115a
commit ed0fc50535
1 changed files with 14 additions and 6 deletions
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20
drivers/misc/habanalabs/habanalabs.h
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@ -36,6 +36,8 @@
#define HL_PCI_ELBI_TIMEOUT_MSEC 10 /* 10ms */
#define HL_SIM_MAX_TIMEOUT_US 10000000 /* 10s */
#define HL_MAX_QUEUES 128
#define HL_MAX_JOBS_PER_CS 64
@ -1041,14 +1043,18 @@ void hl_wreg(struct hl_device *hdev, u32 reg, u32 val);
WREG32(mm##reg, (RREG32(mm##reg) & ~REG_FIELD_MASK(reg, field)) | \
(val) << REG_FIELD_SHIFT(reg, field))
/* Timeout should be longer when working with simulator but cap the
* increased timeout to some maximum
*/
#define hl_poll_timeout(hdev, addr, val, cond, sleep_us, timeout_us) \
({ \
ktime_t __timeout; \
/* timeout should be longer when working with simulator */ \
if (hdev->pdev) \
__timeout = ktime_add_us(ktime_get(), timeout_us); \
else \
__timeout = ktime_add_us(ktime_get(), (timeout_us * 10)); \
__timeout = ktime_add_us(ktime_get(),\
min((u64)(timeout_us * 10), \
(u64) HL_SIM_MAX_TIMEOUT_US)); \
might_sleep_if(sleep_us); \
for (;;) { \
(val) = RREG32(addr); \
@ -1080,11 +1086,12 @@ void hl_wreg(struct hl_device *hdev, u32 reg, u32 val);
mem_written_by_device) \
({ \
ktime_t __timeout; \
/* timeout should be longer when working with simulator */ \
if (hdev->pdev) \
__timeout = ktime_add_us(ktime_get(), timeout_us); \
else \
__timeout = ktime_add_us(ktime_get(), (timeout_us * 10)); \
__timeout = ktime_add_us(ktime_get(),\
min((u64)(timeout_us * 10), \
(u64) HL_SIM_MAX_TIMEOUT_US)); \
might_sleep_if(sleep_us); \
for (;;) { \
/* Verify we read updates done by other cores or by device */ \
@ -1110,11 +1117,12 @@ void hl_wreg(struct hl_device *hdev, u32 reg, u32 val);
timeout_us) \
({ \
ktime_t __timeout; \
/* timeout should be longer when working with simulator */ \
if (hdev->pdev) \
__timeout = ktime_add_us(ktime_get(), timeout_us); \
else \
__timeout = ktime_add_us(ktime_get(), (timeout_us * 10)); \
__timeout = ktime_add_us(ktime_get(),\
min((u64)(timeout_us * 10), \
(u64) HL_SIM_MAX_TIMEOUT_US)); \
might_sleep_if(sleep_us); \
for (;;) { \
(val) = readl(addr); \