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| author | Ofir Bitton <obitton@habana.ai> | 2020-06-15 12:09:50 +0300 |
|---|---|---|
| committer | Oded Gabbay <oded.gabbay@gmail.com> | 2020-07-24 20:31:35 +0300 |
| commit | dd9efabd0a5ae6dab255737c808d5ab6af1e8f91 (patch) | |
| tree | 0afef49f28a0350aa261bd0ff061e1d8ea020194 /drivers/misc/habanalabs/habanalabs.h | |
| parent | 917b79b09671740ce2e2c702641e50f890b27a67 (diff) | |
| download | lwn-dd9efabd0a5ae6dab255737c808d5ab6af1e8f91.tar.gz lwn-dd9efabd0a5ae6dab255737c808d5ab6af1e8f91.zip | |
habanalabs: Increase queues depth
After recent concurrent cs amount increase, we must also
increase queues depth since much more concurrent work can be done.
All external queue depths were increased to 4096 as gaudi's
internal queue depths were also increased to 1024.
Signed-off-by: Ofir Bitton <obitton@habana.ai>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
Diffstat (limited to 'drivers/misc/habanalabs/habanalabs.h')
| -rw-r--r-- | drivers/misc/habanalabs/habanalabs.h | 31 |
1 files changed, 4 insertions, 27 deletions
diff --git a/drivers/misc/habanalabs/habanalabs.h b/drivers/misc/habanalabs/habanalabs.h index 4e68a41cce77..e4d6f7c91194 100644 --- a/drivers/misc/habanalabs/habanalabs.h +++ b/drivers/misc/habanalabs/habanalabs.h @@ -378,38 +378,15 @@ struct hl_cb { struct hl_cs_job; -/* - * Currently, there are two limitations on the maximum length of a queue: - * - * 1. The memory footprint of the queue. The current allocated space for the - * queue is PAGE_SIZE. Because each entry in the queue is HL_BD_SIZE, - * the maximum length of the queue can be PAGE_SIZE / HL_BD_SIZE, - * which currently is 4096/16 = 256 entries. - * - * To increase that, we need either to decrease the size of the - * BD (difficult), or allocate more than a single page (easier). - * - * 2. Because the size of the JOB handle field in the BD CTL / completion queue - * is 10-bit, we can have up to 1024 open jobs per hardware queue. - * Therefore, each queue can hold up to 1024 entries. - * - * HL_QUEUE_LENGTH is in units of struct hl_bd. - * HL_QUEUE_LENGTH * sizeof(struct hl_bd) should be <= HL_PAGE_SIZE - */ - -#define HL_PAGE_SIZE 4096 /* minimum page size */ -/* Must be power of 2 (HL_PAGE_SIZE / HL_BD_SIZE) */ -#define HL_QUEUE_LENGTH 256 +/* Queue length of external and HW queues */ +#define HL_QUEUE_LENGTH 4096 #define HL_QUEUE_SIZE_IN_BYTES (HL_QUEUE_LENGTH * HL_BD_SIZE) -/* - * HL_CQ_LENGTH is in units of struct hl_cq_entry. - * HL_CQ_LENGTH should be <= HL_PAGE_SIZE - */ +/* HL_CQ_LENGTH is in units of struct hl_cq_entry */ #define HL_CQ_LENGTH HL_QUEUE_LENGTH #define HL_CQ_SIZE_IN_BYTES (HL_CQ_LENGTH * HL_CQ_ENTRY_SIZE) -/* Must be power of 2 (HL_PAGE_SIZE / HL_EQ_ENTRY_SIZE) */ +/* Must be power of 2 */ #define HL_EQ_LENGTH 64 #define HL_EQ_SIZE_IN_BYTES (HL_EQ_LENGTH * HL_EQ_ENTRY_SIZE) |