From 22cb855598ed9aa7812941eb29218dc6033b4b43 Mon Sep 17 00:00:00 2001 From: Ofir Bitton Date: Wed, 8 Jul 2020 10:16:27 +0300 Subject: [PATCH] habanalabs: verify queue can contain all cs jobs In order for the user to be aware of wrong inputs, we must return error in case the amount of jobs per cs exceeds the corresponding queue size. Signed-off-by: Ofir Bitton Reviewed-by: Oded Gabbay Signed-off-by: Oded Gabbay --- drivers/misc/habanalabs/habanalabs.h | 4 ++++ drivers/misc/habanalabs/hw_queue.c | 7 +++++++ 2 files changed, 11 insertions(+) diff --git a/drivers/misc/habanalabs/habanalabs.h b/drivers/misc/habanalabs/habanalabs.h index 01fb45887a5a..14def0d26d2d 100644 --- a/drivers/misc/habanalabs/habanalabs.h +++ b/drivers/misc/habanalabs/habanalabs.h @@ -421,6 +421,10 @@ struct hl_cs_job; #define HL_QUEUE_LENGTH 4096 #define HL_QUEUE_SIZE_IN_BYTES (HL_QUEUE_LENGTH * HL_BD_SIZE) +#if (HL_MAX_JOBS_PER_CS > HL_QUEUE_LENGTH) +#error "HL_QUEUE_LENGTH must be greater than HL_MAX_JOBS_PER_CS" +#endif + /* 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) diff --git a/drivers/misc/habanalabs/hw_queue.c b/drivers/misc/habanalabs/hw_queue.c index 474a0e8a7797..287681646071 100644 --- a/drivers/misc/habanalabs/hw_queue.c +++ b/drivers/misc/habanalabs/hw_queue.c @@ -158,6 +158,13 @@ static int int_queue_sanity_checks(struct hl_device *hdev, { int free_slots_cnt; + if (num_of_entries > q->int_queue_len) { + dev_err(hdev->dev, + "Cannot populate queue %u with %u jobs\n", + q->hw_queue_id, num_of_entries); + return -ENOMEM; + } + /* Check we have enough space in the queue */ free_slots_cnt = queue_free_slots(q, q->int_queue_len);