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habanalabs: add support for a long interrupt target value 

In order to avoid user target value wraparound, we modify the
current interface so user will be able to wait for an 8-byte
target value rather than a 4-byte value.

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 2021-09-23 12:02:23 +03:00 committed by Oded Gabbay
parent 027d53b03c
commit d62b9a6976
2 changed files with 11 additions and 10 deletions
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8
drivers/misc/habanalabs/common/command_submission.c
View File

@ -2739,13 +2739,13 @@ static int hl_cs_wait_ioctl(struct hl_fpriv *hpriv, void *data)
static int _hl_interrupt_wait_ioctl(struct hl_device *hdev, struct hl_ctx *ctx,
u32 timeout_us, u64 user_address,
u32 target_value, u16 interrupt_offset,
u64 target_value, u16 interrupt_offset,
enum hl_cs_wait_status *status)
{
struct hl_user_pending_interrupt *pend;
struct hl_user_interrupt *interrupt;
unsigned long timeout, flags;
u32 completion_value;
u64 completion_value;
long completion_rc;
int rc = 0;
@ -2779,7 +2779,7 @@ static int _hl_interrupt_wait_ioctl(struct hl_device *hdev, struct hl_ctx *ctx,
/* We check for completion value as interrupt could have been received
* before we added the node to the wait list
*/
if (copy_from_user(&completion_value, u64_to_user_ptr(user_address), 4)) {
if (copy_from_user(&completion_value, u64_to_user_ptr(user_address), 8)) {
dev_err(hdev->dev, "Failed to copy completion value from user\n");
rc = -EFAULT;
goto remove_pending_user_interrupt;
@ -2811,7 +2811,7 @@ wait_again:
reinit_completion(&pend->fence.completion);
spin_unlock_irqrestore(&interrupt->wait_list_lock, flags);
if (copy_from_user(&completion_value, u64_to_user_ptr(user_address), 4)) {
if (copy_from_user(&completion_value, u64_to_user_ptr(user_address), 8)) {
dev_err(hdev->dev, "Failed to copy completion value from user\n");
rc = -EFAULT;

13
include/uapi/misc/habanalabs.h
View File

@ -897,11 +897,7 @@ struct hl_wait_cs_in {
*/
__u64 addr;
/* Target value for completion comparison */
__u32 target;
/* Absolute timeout to wait for interrupt
* in microseconds
*/
__u32 interrupt_timeout_us;
__u64 target;
};
};
@ -917,7 +913,12 @@ struct hl_wait_cs_in {
/* Multi CS API info- valid entries in multi-CS array */
__u8 seq_arr_len;
__u8 pad[7];
__u8 pad[3];
/* Absolute timeout to wait for an interrupt in microseconds.
* Relevant only when HL_WAIT_CS_FLAGS_INTERRUPT is set
*/
__u32 interrupt_timeout_us;
};
#define HL_WAIT_CS_STATUS_COMPLETED 0