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hghimira
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rodrigovivi
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drm/xe/gt: Update handling of xe_force_wake_get return
xe_force_wake_get() now returns the reference count-incremented domain mask. If it fails for individual domains, the return value will always be 0. However, for XE_FORCEWAKE_ALL, it may return a non-zero value even in the event of failure. Use helper xe_force_wake_ref_has_domain to verify all domains are initialized or not. Update the return handling of xe_force_wake_get() to reflect this behavior, and ensure that the return value is passed as input to xe_force_wake_put(). v3 - return xe_wakeref_t instead of int in xe_force_wake_get() - xe_force_wake_put() error doesn't need to be checked. It internally WARNS on domain ack failure. v4 - Rebase fix v5 - return unsigned int for xe_force_wake_get() - remove redundant XE_WARN_ON() v6 - use helper for checking all initialized domains are awake or not. v7 - Fix commit message v9 - Remove redundant WARN_ON (Badal) Cc: Badal Nilawar <[email protected]> Cc: Matthew Brost <[email protected]> Cc: Rodrigo Vivi <[email protected]> Cc: Lucas De Marchi <[email protected]> Signed-off-by: Himal Prasad Ghimiray <[email protected]> Reviewed-by: Nirmoy Das <[email protected]> Reviewed-by: Badal Nilawar <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected] Signed-off-by: Rodrigo Vivi <[email protected]>
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‎drivers/gpu/drm/xe/xe_gt.c‎

Lines changed: 58 additions & 47 deletions
Original file line numberDiff line numberDiff line change
@@ -97,14 +97,14 @@ void xe_gt_sanitize(struct xe_gt *gt)
9797

9898
static void xe_gt_enable_host_l2_vram(struct xe_gt *gt)
9999
{
100+
unsigned int fw_ref;
100101
u32 reg;
101-
int err;
102102

103103
if (!XE_WA(gt, 16023588340))
104104
return;
105105

106-
err = xe_force_wake_get(gt_to_fw(gt), XE_FW_GT);
107-
if (WARN_ON(err))
106+
fw_ref = xe_force_wake_get(gt_to_fw(gt), XE_FW_GT);
107+
if (!fw_ref)
108108
return;
109109

110110
if (!xe_gt_is_media_type(gt)) {
@@ -114,29 +114,29 @@ static void xe_gt_enable_host_l2_vram(struct xe_gt *gt)
114114
}
115115

116116
xe_gt_mcr_multicast_write(gt, XEHPC_L3CLOS_MASK(3), 0x3);
117-
xe_force_wake_put(gt_to_fw(gt), XE_FW_GT);
117+
xe_force_wake_put(gt_to_fw(gt), fw_ref);
118118
}
119119

120120
static void xe_gt_disable_host_l2_vram(struct xe_gt *gt)
121121
{
122+
unsigned int fw_ref;
122123
u32 reg;
123-
int err;
124124

125125
if (!XE_WA(gt, 16023588340))
126126
return;
127127

128128
if (xe_gt_is_media_type(gt))
129129
return;
130130

131-
err = xe_force_wake_get(gt_to_fw(gt), XE_FW_GT);
132-
if (WARN_ON(err))
131+
fw_ref = xe_force_wake_get(gt_to_fw(gt), XE_FW_GT);
132+
if (!fw_ref)
133133
return;
134134

135135
reg = xe_gt_mcr_unicast_read_any(gt, XE2_GAMREQSTRM_CTRL);
136136
reg &= ~CG_DIS_CNTLBUS;
137137
xe_gt_mcr_multicast_write(gt, XE2_GAMREQSTRM_CTRL, reg);
138138

139-
xe_force_wake_put(gt_to_fw(gt), XE_FW_GT);
139+
xe_force_wake_put(gt_to_fw(gt), fw_ref);
140140
}
141141

142142
/**
@@ -402,11 +402,14 @@ static void dump_pat_on_error(struct xe_gt *gt)
402402

403403
static int gt_fw_domain_init(struct xe_gt *gt)
404404
{
405+
unsigned int fw_ref;
405406
int err, i;
406407

407-
err = xe_force_wake_get(gt_to_fw(gt), XE_FW_GT);
408-
if (err)
408+
fw_ref = xe_force_wake_get(gt_to_fw(gt), XE_FW_GT);
409+
if (!fw_ref) {
410+
err = -ETIMEDOUT;
409411
goto err_hw_fence_irq;
412+
}
410413

411414
if (!xe_gt_is_media_type(gt)) {
412415
err = xe_ggtt_init(gt_to_tile(gt)->mem.ggtt);
@@ -441,14 +444,12 @@ static int gt_fw_domain_init(struct xe_gt *gt)
441444
*/
442445
gt->info.gmdid = xe_mmio_read32(&gt->mmio, GMD_ID);
443446

444-
err = xe_force_wake_put(gt_to_fw(gt), XE_FW_GT);
445-
XE_WARN_ON(err);
446-
447+
xe_force_wake_put(gt_to_fw(gt), fw_ref);
447448
return 0;
448449

449450
err_force_wake:
450451
dump_pat_on_error(gt);
451-
xe_force_wake_put(gt_to_fw(gt), XE_FW_GT);
452+
xe_force_wake_put(gt_to_fw(gt), fw_ref);
452453
err_hw_fence_irq:
453454
for (i = 0; i < XE_ENGINE_CLASS_MAX; ++i)
454455
xe_hw_fence_irq_finish(&gt->fence_irq[i]);
@@ -458,11 +459,14 @@ static int gt_fw_domain_init(struct xe_gt *gt)
458459

459460
static int all_fw_domain_init(struct xe_gt *gt)
460461
{
462+
unsigned int fw_ref;
461463
int err, i;
462464

463-
err = xe_force_wake_get(gt_to_fw(gt), XE_FORCEWAKE_ALL);
464-
if (err)
465-
goto err_hw_fence_irq;
465+
fw_ref = xe_force_wake_get(gt_to_fw(gt), XE_FORCEWAKE_ALL);
466+
if (!xe_force_wake_ref_has_domain(fw_ref, XE_FORCEWAKE_ALL)) {
467+
err = -ETIMEDOUT;
468+
goto err_force_wake;
469+
}
466470

467471
xe_gt_mcr_set_implicit_defaults(gt);
468472
xe_reg_sr_apply_mmio(&gt->reg_sr, gt);
@@ -526,14 +530,12 @@ static int all_fw_domain_init(struct xe_gt *gt)
526530
if (IS_SRIOV_PF(gt_to_xe(gt)))
527531
xe_gt_sriov_pf_init_hw(gt);
528532

529-
err = xe_force_wake_put(gt_to_fw(gt), XE_FORCEWAKE_ALL);
530-
XE_WARN_ON(err);
533+
xe_force_wake_put(gt_to_fw(gt), fw_ref);
531534

532535
return 0;
533536

534537
err_force_wake:
535-
xe_force_wake_put(gt_to_fw(gt), XE_FORCEWAKE_ALL);
536-
err_hw_fence_irq:
538+
xe_force_wake_put(gt_to_fw(gt), fw_ref);
537539
for (i = 0; i < XE_ENGINE_CLASS_MAX; ++i)
538540
xe_hw_fence_irq_finish(&gt->fence_irq[i]);
539541

@@ -546,11 +548,12 @@ static int all_fw_domain_init(struct xe_gt *gt)
546548
*/
547549
int xe_gt_init_hwconfig(struct xe_gt *gt)
548550
{
551+
unsigned int fw_ref;
549552
int err;
550553

551-
err = xe_force_wake_get(gt_to_fw(gt), XE_FW_GT);
552-
if (err)
553-
goto out;
554+
fw_ref = xe_force_wake_get(gt_to_fw(gt), XE_FW_GT);
555+
if (!fw_ref)
556+
return -ETIMEDOUT;
554557

555558
xe_gt_mcr_init_early(gt);
556559
xe_pat_init(gt);
@@ -568,8 +571,7 @@ int xe_gt_init_hwconfig(struct xe_gt *gt)
568571
xe_gt_enable_host_l2_vram(gt);
569572

570573
out_fw:
571-
xe_force_wake_put(gt_to_fw(gt), XE_FW_GT);
572-
out:
574+
xe_force_wake_put(gt_to_fw(gt), fw_ref);
573575
return err;
574576
}
575577

@@ -764,6 +766,7 @@ static int do_gt_restart(struct xe_gt *gt)
764766

765767
static int gt_reset(struct xe_gt *gt)
766768
{
769+
unsigned int fw_ref;
767770
int err;
768771

769772
if (xe_device_wedged(gt_to_xe(gt)))
@@ -784,9 +787,11 @@ static int gt_reset(struct xe_gt *gt)
784787

785788
xe_gt_sanitize(gt);
786789

787-
err = xe_force_wake_get(gt_to_fw(gt), XE_FORCEWAKE_ALL);
788-
if (err)
789-
goto err_msg;
790+
fw_ref = xe_force_wake_get(gt_to_fw(gt), XE_FORCEWAKE_ALL);
791+
if (!xe_force_wake_ref_has_domain(fw_ref, XE_FORCEWAKE_ALL)) {
792+
err = -ETIMEDOUT;
793+
goto err_out;
794+
}
790795

791796
xe_uc_gucrc_disable(&gt->uc);
792797
xe_uc_stop_prepare(&gt->uc);
@@ -804,17 +809,15 @@ static int gt_reset(struct xe_gt *gt)
804809
if (err)
805810
goto err_out;
806811

807-
err = xe_force_wake_put(gt_to_fw(gt), XE_FORCEWAKE_ALL);
808-
XE_WARN_ON(err);
812+
xe_force_wake_put(gt_to_fw(gt), fw_ref);
809813
xe_pm_runtime_put(gt_to_xe(gt));
810814

811815
xe_gt_info(gt, "reset done\n");
812816

813817
return 0;
814818

815819
err_out:
816-
XE_WARN_ON(xe_force_wake_put(gt_to_fw(gt), XE_FORCEWAKE_ALL));
817-
err_msg:
820+
xe_force_wake_put(gt_to_fw(gt), fw_ref);
818821
XE_WARN_ON(xe_uc_start(&gt->uc));
819822
err_fail:
820823
xe_gt_err(gt, "reset failed (%pe)\n", ERR_PTR(err));
@@ -846,22 +849,25 @@ void xe_gt_reset_async(struct xe_gt *gt)
846849

847850
void xe_gt_suspend_prepare(struct xe_gt *gt)
848851
{
849-
XE_WARN_ON(xe_force_wake_get(gt_to_fw(gt), XE_FORCEWAKE_ALL));
852+
unsigned int fw_ref;
853+
854+
fw_ref = xe_force_wake_get(gt_to_fw(gt), XE_FORCEWAKE_ALL);
850855

851856
xe_uc_stop_prepare(&gt->uc);
852857

853-
XE_WARN_ON(xe_force_wake_put(gt_to_fw(gt), XE_FORCEWAKE_ALL));
858+
xe_force_wake_put(gt_to_fw(gt), fw_ref);
854859
}
855860

856861
int xe_gt_suspend(struct xe_gt *gt)
857862
{
863+
unsigned int fw_ref;
858864
int err;
859865

860866
xe_gt_dbg(gt, "suspending\n");
861867
xe_gt_sanitize(gt);
862868

863-
err = xe_force_wake_get(gt_to_fw(gt), XE_FORCEWAKE_ALL);
864-
if (err)
869+
fw_ref = xe_force_wake_get(gt_to_fw(gt), XE_FORCEWAKE_ALL);
870+
if (!xe_force_wake_ref_has_domain(fw_ref, XE_FORCEWAKE_ALL))
865871
goto err_msg;
866872

867873
err = xe_uc_suspend(&gt->uc);
@@ -872,24 +878,27 @@ int xe_gt_suspend(struct xe_gt *gt)
872878

873879
xe_gt_disable_host_l2_vram(gt);
874880

875-
XE_WARN_ON(xe_force_wake_put(gt_to_fw(gt), XE_FORCEWAKE_ALL));
881+
xe_force_wake_put(gt_to_fw(gt), fw_ref);
876882
xe_gt_dbg(gt, "suspended\n");
877883

878884
return 0;
879885

880-
err_force_wake:
881-
XE_WARN_ON(xe_force_wake_put(gt_to_fw(gt), XE_FORCEWAKE_ALL));
882886
err_msg:
887+
err = -ETIMEDOUT;
888+
err_force_wake:
889+
xe_force_wake_put(gt_to_fw(gt), fw_ref);
883890
xe_gt_err(gt, "suspend failed (%pe)\n", ERR_PTR(err));
884891

885892
return err;
886893
}
887894

888895
void xe_gt_shutdown(struct xe_gt *gt)
889896
{
890-
xe_force_wake_get(gt_to_fw(gt), XE_FORCEWAKE_ALL);
897+
unsigned int fw_ref;
898+
899+
fw_ref = xe_force_wake_get(gt_to_fw(gt), XE_FORCEWAKE_ALL);
891900
do_gt_reset(gt);
892-
xe_force_wake_put(gt_to_fw(gt), XE_FORCEWAKE_ALL);
901+
xe_force_wake_put(gt_to_fw(gt), fw_ref);
893902
}
894903

895904
/**
@@ -914,11 +923,12 @@ int xe_gt_sanitize_freq(struct xe_gt *gt)
914923

915924
int xe_gt_resume(struct xe_gt *gt)
916925
{
926+
unsigned int fw_ref;
917927
int err;
918928

919929
xe_gt_dbg(gt, "resuming\n");
920-
err = xe_force_wake_get(gt_to_fw(gt), XE_FORCEWAKE_ALL);
921-
if (err)
930+
fw_ref = xe_force_wake_get(gt_to_fw(gt), XE_FORCEWAKE_ALL);
931+
if (!xe_force_wake_ref_has_domain(fw_ref, XE_FORCEWAKE_ALL))
922932
goto err_msg;
923933

924934
err = do_gt_restart(gt);
@@ -927,14 +937,15 @@ int xe_gt_resume(struct xe_gt *gt)
927937

928938
xe_gt_idle_enable_pg(gt);
929939

930-
XE_WARN_ON(xe_force_wake_put(gt_to_fw(gt), XE_FORCEWAKE_ALL));
940+
xe_force_wake_put(gt_to_fw(gt), fw_ref);
931941
xe_gt_dbg(gt, "resumed\n");
932942

933943
return 0;
934944

935-
err_force_wake:
936-
XE_WARN_ON(xe_force_wake_put(gt_to_fw(gt), XE_FORCEWAKE_ALL));
937945
err_msg:
946+
err = -ETIMEDOUT;
947+
err_force_wake:
948+
xe_force_wake_put(gt_to_fw(gt), fw_ref);
938949
xe_gt_err(gt, "resume failed (%pe)\n", ERR_PTR(err));
939950

940951
return err;

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