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drm/xe/xe2: Respond to TRTT faults as unsuccessful page fault

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SW is not expected to handle TRTT faults and should report these as
unsuccessful page fault in the reply, such that HW can respond by
raising a CAT error.

Signed-off-by: Brian Welty <brian.welty@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
This commit is contained in:
Brian Welty
2023-11-21 12:10:37 -08:00
committed by Rodrigo Vivi
parent a682b6a42d
commit 594b46ba0c
1 changed files with 6 additions and 0 deletions
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6
drivers/gpu/drm/xe/xe_gt_pagefault.c
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@@ -34,6 +34,7 @@ struct pagefault {
u8 engine_class;
u8 engine_instance;
u8 fault_unsuccessful;
bool trva_fault;
};
enum access_type {
@@ -138,6 +139,10 @@ static int handle_pagefault(struct xe_gt *gt, struct pagefault *pf)
int ret = 0;
bool atomic;
/* SW isn't expected to handle TRTT faults */
if (pf->trva_fault)
return -EFAULT;
/* ASID to VM */
mutex_lock(&xe->usm.lock);
vm = xa_load(&xe->usm.asid_to_vm, pf->asid);
@@ -282,6 +287,7 @@ static bool get_pagefault(struct pf_queue *pf_queue, struct pagefault *pf)
(pf_queue->data + pf_queue->head);
pf->fault_level = FIELD_GET(PFD_FAULT_LEVEL, desc->dw0);
pf->trva_fault = FIELD_GET(XE2_PFD_TRVA_FAULT, desc->dw0);
pf->engine_class = FIELD_GET(PFD_ENG_CLASS, desc->dw0);
pf->engine_instance = FIELD_GET(PFD_ENG_INSTANCE, desc->dw0);
pf->pdata = FIELD_GET(PFD_PDATA_HI, desc->dw1) <<