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drm/xe: Add xe_gt_tlb_invalidation_done_handler

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Decouple GT TLB seqno handling from G2H handler.

v2:
 - Add kernel doc

Reviewed-by: Stuart Summers <stuart.summers@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Link: https://lore.kernel.org/r/20250826182911.392550-6-stuart.summers@intel.com
This commit is contained in:
Matthew Brost
2025-08-26 18:29:07 +00:00
parent 594bb930fc
commit 6d1e452e09
1 changed files with 30 additions and 17 deletions
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47
drivers/gpu/drm/xe/xe_gt_tlb_inval.c
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@@ -506,27 +506,18 @@ void xe_gt_tlb_inval_vm(struct xe_gt *gt, struct xe_vm *vm)
}
/**
* xe_guc_tlb_inval_done_handler - TLB invalidation done handler
* @guc: guc
* @msg: message indicating TLB invalidation done
* @len: length of message
* xe_gt_tlb_inval_done_handler - GT TLB invalidation done handler
* @gt: gt
* @seqno: seqno of invalidation that is done
*
* Parse seqno of TLB invalidation, wake any waiters for seqno, and signal any
* invalidation fences for seqno. Algorithm for this depends on seqno being
* received in-order and asserts this assumption.
*
* Return: 0 on success, -EPROTO for malformed messages.
* Update recv seqno, signal any GT TLB invalidation fences, and restart TDR
*/
int xe_guc_tlb_inval_done_handler(struct xe_guc *guc, u32 *msg, u32 len)
static void xe_gt_tlb_inval_done_handler(struct xe_gt *gt, int seqno)
{
struct xe_gt *gt = guc_to_gt(guc);
struct xe_device *xe = gt_to_xe(gt);
struct xe_gt_tlb_inval_fence *fence, *next;
unsigned long flags;
if (unlikely(len != 1))
return -EPROTO;
/*
* This can also be run both directly from the IRQ handler and also in
* process_g2h_msg(). Only one may process any individual CT message,
@@ -543,12 +534,12 @@ int xe_guc_tlb_inval_done_handler(struct xe_guc *guc, u32 *msg, u32 len)
* process_g2h_msg().
*/
spin_lock_irqsave(&gt->tlb_inval.pending_lock, flags);
if (tlb_inval_seqno_past(gt, msg[0])) {
if (tlb_inval_seqno_past(gt, seqno)) {
spin_unlock_irqrestore(&gt->tlb_inval.pending_lock, flags);
return 0;
return;
}
WRITE_ONCE(gt->tlb_inval.seqno_recv, msg[0]);
WRITE_ONCE(gt->tlb_inval.seqno_recv, seqno);
list_for_each_entry_safe(fence, next,
&gt->tlb_inval.pending_fences, link) {
@@ -568,6 +559,28 @@ int xe_guc_tlb_inval_done_handler(struct xe_guc *guc, u32 *msg, u32 len)
cancel_delayed_work(&gt->tlb_inval.fence_tdr);
spin_unlock_irqrestore(&gt->tlb_inval.pending_lock, flags);
}
/**
* xe_guc_tlb_inval_done_handler - TLB invalidation done handler
* @guc: guc
* @msg: message indicating TLB invalidation done
* @len: length of message
*
* Parse seqno of TLB invalidation, wake any waiters for seqno, and signal any
* invalidation fences for seqno. Algorithm for this depends on seqno being
* received in-order and asserts this assumption.
*
* Return: 0 on success, -EPROTO for malformed messages.
*/
int xe_guc_tlb_inval_done_handler(struct xe_guc *guc, u32 *msg, u32 len)
{
struct xe_gt *gt = guc_to_gt(guc);
if (unlikely(len != 1))
return -EPROTO;
xe_gt_tlb_inval_done_handler(gt, msg[0]);
return 0;
}