drm/xe: use entry_dump callbacks for xe2+ PAT dumps

Move xe2+ PAT entry printing into the entry_dump op so platform
specific logic stays localized, simplifying future maintenance.

v2:
 - Do not null xe->pat.ops for VFs.
 - Skip PAT init and dump on VFs (-EOPNOTSUPP), avoiding NULL ops use.

v3:
 - fixed typo

v4: (Matt)
 - Switch xe2_dump() to use the new ops->entry_dump() vfunc.
 - Remove xe3p_xpc_dump() and reuse the common xe2_dump() for Xe3p XPC.
 - This also fixes Xe3p_HPM media PAT dumping by using the proper
non-MCR access for the PAT register range (bspec 76445).

Cc: Matt Roper <matthew.d.roper@intel.com>
Suggested-by: Brian Nguyen <brian3.nguyen@intel.com>
Signed-off-by: Xin Wang <x.wang@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patch.msgid.link/20260130175349.2249033-1-x.wang@intel.com
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>

1 files changed, 16 insertions, 51 deletions

diff --git a/drivers/gpu/drm/xe/xe_pat.c b/drivers/gpu/drm/xe/xe_pat.c
index 14d0dce5190a..2cd3fd1c3953 100644
--- a/drivers/gpu/drm/xe/xe_pat.c
+++ b/drivers/gpu/drm/xe/xe_pat.c
@@ -88,6 +88,7 @@ struct xe_pat_ops {
 	void (*program_media)(struct xe_gt *gt, const struct xe_pat_table_entry table[],
 			      int n_entries);
 	int (*dump)(struct xe_gt *gt, struct drm_printer *p);
+	void (*entry_dump)(struct drm_printer *p, const char *label, u32 pat, bool rsvd);
 };
 
 static const struct xe_pat_table_entry xelp_pat_table[] = {
@@ -458,7 +459,7 @@ static int xe2_dump(struct xe_gt *gt, struct drm_printer *p)
 			pat = xe_gt_mcr_unicast_read_any(gt, XE_REG_MCR(_PAT_INDEX(i)));
 
 		xe_pat_index_label(label, sizeof(label), i);
-		xe2_pat_entry_dump(p, label, pat, !xe->pat.table[i].valid);
+		xe->pat.ops->entry_dump(p, label, pat, !xe->pat.table[i].valid);
 	}
 
 	/*
@@ -471,7 +472,7 @@ static int xe2_dump(struct xe_gt *gt, struct drm_printer *p)
 		pat = xe_gt_mcr_unicast_read_any(gt, XE_REG_MCR(_PAT_PTA));
 
 	drm_printf(p, "Page Table Access:\n");
-	xe2_pat_entry_dump(p, "PTA_MODE", pat, false);
+	xe->pat.ops->entry_dump(p, "PTA_MODE", pat, false);
 
 	return 0;
 }
@@ -480,44 +481,14 @@ static const struct xe_pat_ops xe2_pat_ops = {
 	.program_graphics = program_pat_mcr,
 	.program_media = program_pat,
 	.dump = xe2_dump,
+	.entry_dump = xe2_pat_entry_dump,
 };
 
-static int xe3p_xpc_dump(struct xe_gt *gt, struct drm_printer *p)
-{
-	struct xe_device *xe = gt_to_xe(gt);
-	u32 pat;
-	int i;
-	char label[PAT_LABEL_LEN];
-
-	CLASS(xe_force_wake, fw_ref)(gt_to_fw(gt), XE_FW_GT);
-	if (!fw_ref.domains)
-		return -ETIMEDOUT;
-
-	drm_printf(p, "PAT table: (* = reserved entry)\n");
-
-	for (i = 0; i < xe->pat.n_entries; i++) {
-		pat = xe_gt_mcr_unicast_read_any(gt, XE_REG_MCR(_PAT_INDEX(i)));
-
-		xe_pat_index_label(label, sizeof(label), i);
-		xe3p_xpc_pat_entry_dump(p, label, pat, !xe->pat.table[i].valid);
-	}
-
-	/*
-	 * Also print PTA_MODE, which describes how the hardware accesses
-	 * PPGTT entries.
-	 */
-	pat = xe_gt_mcr_unicast_read_any(gt, XE_REG_MCR(_PAT_PTA));
-
-	drm_printf(p, "Page Table Access:\n");
-	xe3p_xpc_pat_entry_dump(p, "PTA_MODE", pat, false);
-
-	return 0;
-}
-
 static const struct xe_pat_ops xe3p_xpc_pat_ops = {
 	.program_graphics = program_pat_mcr,
 	.program_media = program_pat,
-	.dump = xe3p_xpc_dump,
+	.dump = xe2_dump,
+	.entry_dump = xe3p_xpc_pat_entry_dump,
 };
 
 void xe_pat_init_early(struct xe_device *xe)
@@ -600,20 +571,17 @@ void xe_pat_init_early(struct xe_device *xe)
 			GRAPHICS_VER(xe), GRAPHICS_VERx100(xe) % 100);
 	}
 
-	/* VFs can't program nor dump PAT settings */
-	if (IS_SRIOV_VF(xe))
-		xe->pat.ops = NULL;
-
-	xe_assert(xe, !xe->pat.ops || xe->pat.ops->dump);
-	xe_assert(xe, !xe->pat.ops || xe->pat.ops->program_graphics);
-	xe_assert(xe, !xe->pat.ops || MEDIA_VER(xe) < 13 || xe->pat.ops->program_media);
+	xe_assert(xe, xe->pat.ops->dump);
+	xe_assert(xe, xe->pat.ops->program_graphics);
+	xe_assert(xe, MEDIA_VER(xe) < 13 || xe->pat.ops->program_media);
+	xe_assert(xe, GRAPHICS_VER(xe) < 20 || xe->pat.ops->entry_dump);
 }
 
 void xe_pat_init(struct xe_gt *gt)
 {
 	struct xe_device *xe = gt_to_xe(gt);
 
-	if (!xe->pat.ops)
+	if (IS_SRIOV_VF(xe))
 		return;
 
 	if (xe_gt_is_media_type(gt))
@@ -633,7 +601,7 @@ int xe_pat_dump(struct xe_gt *gt, struct drm_printer *p)
 {
 	struct xe_device *xe = gt_to_xe(gt);
 
-	if (!xe->pat.ops)
+	if (IS_SRIOV_VF(xe))
 		return -EOPNOTSUPP;
 
 	return xe->pat.ops->dump(gt, p);
@@ -658,12 +626,9 @@ int xe_pat_dump_sw_config(struct xe_gt *gt, struct drm_printer *p)
 	for (u32 i = 0; i < xe->pat.n_entries; i++) {
 		u32 pat = xe->pat.table[i].value;
 
-		if (GRAPHICS_VERx100(xe) == 3511) {
-			xe_pat_index_label(label, sizeof(label), i);
-			xe3p_xpc_pat_entry_dump(p, label, pat, !xe->pat.table[i].valid);
-		} else if (GRAPHICS_VER(xe) == 30 || GRAPHICS_VER(xe) == 20) {
+		if (GRAPHICS_VER(xe) >= 20) {
 			xe_pat_index_label(label, sizeof(label), i);
-			xe2_pat_entry_dump(p, label, pat, !xe->pat.table[i].valid);
+			xe->pat.ops->entry_dump(p, label, pat, !xe->pat.table[i].valid);
 		} else if (xe->info.platform == XE_METEORLAKE) {
 			xelpg_pat_entry_dump(p, i, pat);
 		} else if (xe->info.platform == XE_PVC) {
@@ -679,14 +644,14 @@ int xe_pat_dump_sw_config(struct xe_gt *gt, struct drm_printer *p)
 		u32 pat = xe->pat.pat_pta->value;
 
 		drm_printf(p, "Page Table Access:\n");
-		xe2_pat_entry_dump(p, "PTA_MODE", pat, false);
+		xe->pat.ops->entry_dump(p, "PTA_MODE", pat, false);
 	}
 
 	if (xe->pat.pat_ats) {
 		u32 pat = xe->pat.pat_ats->value;
 
 		drm_printf(p, "PCIe ATS/PASID:\n");
-		xe2_pat_entry_dump(p, "PAT_ATS ", pat, false);
+		xe->pat.ops->entry_dump(p, "PAT_ATS ", pat, false);
 	}
 
 	drm_printf(p, "Cache Level:\n");