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habanalabs: add support for common decoder interrupts 

User application should be able to get notification for any decoder
completion. Hence, we introduce a new interface in which a user
can wait for all current decoder pending interrupts.

Signed-off-by: Ofir Bitton <obitton@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
This commit is contained in:
Ofir Bitton 2022-06-28 18:34:58 +03:00 committed by Oded Gabbay
parent 1a6609cdd4
commit d6a66d5960
5 changed files with 19 additions and 6 deletions
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5
drivers/misc/habanalabs/common/command_submission.c
View File

@ -1082,6 +1082,9 @@ void hl_release_pending_user_interrupts(struct hl_device *hdev)
interrupt = &hdev->common_user_cq_interrupt;
wake_pending_user_interrupt_threads(interrupt);
interrupt = &hdev->common_decoder_interrupt;
wake_pending_user_interrupt_threads(interrupt);
}
static void job_wq_completion(struct work_struct *work)
@ -3375,6 +3378,8 @@ static int hl_interrupt_wait_ioctl(struct hl_fpriv *hpriv, void *data)
} else if (interrupt_id == HL_COMMON_USER_CQ_INTERRUPT_ID) {
interrupt = &hdev->common_user_cq_interrupt;
} else if (interrupt_id == HL_COMMON_DEC_INTERRUPT_ID) {
interrupt = &hdev->common_decoder_interrupt;
} else {
dev_err(hdev->dev, "invalid user interrupt %u", interrupt_id);
return -EINVAL;

3
drivers/misc/habanalabs/common/habanalabs.h
View File

@ -77,6 +77,7 @@ struct hl_fpriv;
#define HL_INVALID_QUEUE UINT_MAX
#define HL_COMMON_USER_CQ_INTERRUPT_ID 0xFFF
#define HL_COMMON_DEC_INTERRUPT_ID 0xFFE
#define HL_STATE_DUMP_HIST_LEN 5
@ -2955,6 +2956,7 @@ struct hl_reset_info {
* @common_user_cq_interrupt: common user CQ interrupt for all user CQ interrupts.
* upon any user CQ interrupt, driver will monitor the
* list of fences registered to this common structure.
* @common_decoder_interrupt: common decoder interrupt for all user decoder interrupts.
* @shadow_cs_queue: pointer to a shadow queue that holds pointers to
* outstanding command submissions.
* @cq_wq: work queues of completion queues for executing work in process
@ -3119,6 +3121,7 @@ struct hl_device {
struct hl_cq *completion_queue;
struct hl_user_interrupt *user_interrupt;
struct hl_user_interrupt common_user_cq_interrupt;
struct hl_user_interrupt common_decoder_interrupt;
struct hl_cs **shadow_cs_queue;
struct workqueue_struct **cq_wq;
struct workqueue_struct *eq_wq;

9
drivers/misc/habanalabs/common/irq.c
View File

@ -333,12 +333,9 @@ irqreturn_t hl_irq_handler_user_interrupt(int irq, void *arg)
struct hl_user_interrupt *user_int = arg;
struct hl_device *hdev = user_int->hdev;
/* If the interrupt is not a decoder interrupt, it means the interrupt
* belongs to a user cq. In that case, before handling it, we need to handle the common
* user cq
*/
if (!user_int->is_decoder)
/* Handle user cq interrupts registered on all interrupts */
if (user_int->is_decoder)
handle_user_interrupt(hdev, &hdev->common_decoder_interrupt);
else
handle_user_interrupt(hdev, &hdev->common_user_cq_interrupt);
/* Handle user cq or decoder interrupts registered on this specific irq */

4
drivers/misc/habanalabs/gaudi2/gaudi2.c
View File

@ -2895,6 +2895,10 @@ static void gaudi2_user_interrupt_setup(struct hl_device *hdev)
HL_USR_INTR_STRUCT_INIT(hdev->common_user_cq_interrupt, hdev,
HL_COMMON_USER_CQ_INTERRUPT_ID, false);
/* Initialize common decoder interrupt */
HL_USR_INTR_STRUCT_INIT(hdev->common_decoder_interrupt, hdev,
HL_COMMON_DEC_INTERRUPT_ID, true);
/* User interrupts structure holds both decoder and user interrupts from various engines.
* We first initialize the decoder interrupts and then we add the user interrupts.
* The only limitation is that the last decoder interrupt id must be smaller

4
include/uapi/misc/habanalabs.h
View File

@ -1443,6 +1443,7 @@ union hl_cs_args {
#define HL_WAIT_CS_FLAGS_INTERRUPT 0x2
#define HL_WAIT_CS_FLAGS_INTERRUPT_MASK 0xFFF00000
#define HL_WAIT_CS_FLAGS_ANY_CQ_INTERRUPT 0xFFF00000
#define HL_WAIT_CS_FLAGS_ANY_DEC_INTERRUPT 0xFFE00000
#define HL_WAIT_CS_FLAGS_MULTI_CS 0x4
#define HL_WAIT_CS_FLAGS_INTERRUPT_KERNEL_CQ 0x10
#define HL_WAIT_CS_FLAGS_REGISTER_INTERRUPT 0x20
@ -1496,6 +1497,9 @@ struct hl_wait_cs_in {
*
* in order to wait for any CQ interrupt, set interrupt value to
* HL_WAIT_CS_FLAGS_ANY_CQ_INTERRUPT.
*
* in order to wait for any decoder interrupt, set interrupt value to
* HL_WAIT_CS_FLAGS_ANY_DEC_INTERRUPT.
*/
__u32 flags;