From: Tvrtko Ursulin <tvrtko.ursu...@intel.com>

Eliminate a bunch of runtime calls to i915_gem_get_pat_index() by caching
the interesting PAT indices in struct drm_i915_private. They are static
per platfrom so no need to consult a function every time.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursu...@intel.com>
Cc: Matt Roper <matthew.d.ro...@intel.com>
Cc: Fei Yang <fei.y...@intel.com>
---
 drivers/gpu/drm/i915/Makefile                 |  1 +
 .../gpu/drm/i915/gem/i915_gem_execbuffer.c    |  3 +--
 drivers/gpu/drm/i915/gem/i915_gem_stolen.c    |  7 ++---
 drivers/gpu/drm/i915/gem/i915_gem_ttm_move.c  | 26 ++++++++++++-------
 .../gpu/drm/i915/gem/selftests/huge_pages.c   |  2 +-
 drivers/gpu/drm/i915/gt/gen6_ppgtt.c          |  4 +--
 drivers/gpu/drm/i915/gt/gen8_ppgtt.c          |  4 +--
 drivers/gpu/drm/i915/gt/intel_ggtt.c          |  8 ++----
 drivers/gpu/drm/i915/gt/intel_migrate.c       | 11 +++-----
 drivers/gpu/drm/i915/gt/selftest_migrate.c    |  9 +++----
 drivers/gpu/drm/i915/gt/selftest_reset.c      | 14 +++-------
 drivers/gpu/drm/i915/gt/selftest_tlb.c        |  5 ++--
 drivers/gpu/drm/i915/gt/uc/intel_uc_fw.c      |  8 ++----
 drivers/gpu/drm/i915/i915_cache.c             | 18 +++++++++++++
 drivers/gpu/drm/i915/i915_cache.h             | 13 ++++++++++
 drivers/gpu/drm/i915/i915_driver.c            |  3 +++
 drivers/gpu/drm/i915/i915_drv.h               |  2 ++
 drivers/gpu/drm/i915/i915_gem.c               |  8 ++----
 drivers/gpu/drm/i915/i915_gpu_error.c         |  8 ++----
 drivers/gpu/drm/i915/selftests/i915_gem.c     |  5 +---
 .../gpu/drm/i915/selftests/i915_gem_evict.c   |  4 +--
 drivers/gpu/drm/i915/selftests/i915_gem_gtt.c | 11 +++-----
 .../drm/i915/selftests/intel_memory_region.c  |  4 +--
 .../gpu/drm/i915/selftests/mock_gem_device.c  |  2 ++
 24 files changed, 89 insertions(+), 91 deletions(-)
 create mode 100644 drivers/gpu/drm/i915/i915_cache.c
 create mode 100644 drivers/gpu/drm/i915/i915_cache.h

diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
index c5fc91cd58e7..905a51a16588 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -35,6 +35,7 @@ subdir-ccflags-y += -I$(srctree)/$(src)
 # core driver code
 i915-y += i915_driver.o \
          i915_drm_client.o \
+         i915_cache.o \
          i915_config.o \
          i915_getparam.o \
          i915_ioctl.o \
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c 
b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
index 5a687a3686bd..0a1d40220020 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
@@ -1330,8 +1330,7 @@ static void *reloc_iomap(struct i915_vma *batch,
                ggtt->vm.insert_page(&ggtt->vm,
                                     i915_gem_object_get_dma_address(obj, page),
                                     offset,
-                                    i915_gem_get_pat_index(ggtt->vm.i915,
-                                                           I915_CACHE_NONE),
+                                    eb->i915->pat_uc,
                                     0);
        } else {
                offset += page << PAGE_SHIFT;
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_stolen.c 
b/drivers/gpu/drm/i915/gem/i915_gem_stolen.c
index 5b0a5cf9a98a..1c8eb806b7d3 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_stolen.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_stolen.c
@@ -563,11 +563,8 @@ static void dbg_poison(struct i915_ggtt *ggtt,
        while (size) {
                void __iomem *s;
 
-               ggtt->vm.insert_page(&ggtt->vm, addr,
-                                    ggtt->error_capture.start,
-                                    i915_gem_get_pat_index(ggtt->vm.i915,
-                                                           I915_CACHE_NONE),
-                                    0);
+               ggtt->vm.insert_page(&ggtt->vm, addr, ggtt->error_capture.start,
+                                    ggtt->vm.i915->pat_uc, 0);
                mb();
 
                s = io_mapping_map_wc(&ggtt->iomap,
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_ttm_move.c 
b/drivers/gpu/drm/i915/gem/i915_gem_ttm_move.c
index 7078af2f8f79..6bd6c239f4ac 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_ttm_move.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_ttm_move.c
@@ -58,6 +58,16 @@ i915_ttm_cache_level(struct drm_i915_private *i915, struct 
ttm_resource *res,
                I915_CACHE_NONE;
 }
 
+static unsigned int
+i915_ttm_cache_pat(struct drm_i915_private *i915, struct ttm_resource *res,
+                  struct ttm_tt *ttm)
+{
+       return ((HAS_LLC(i915) || HAS_SNOOP(i915)) &&
+               !i915_ttm_gtt_binds_lmem(res) &&
+               ttm->caching == ttm_cached) ? i915->pat_wb :
+               i915->pat_uc;
+}
+
 static struct intel_memory_region *
 i915_ttm_region(struct ttm_device *bdev, int ttm_mem_type)
 {
@@ -196,7 +206,7 @@ static struct dma_fence *i915_ttm_accel_move(struct 
ttm_buffer_object *bo,
        struct drm_i915_gem_object *obj = i915_ttm_to_gem(bo);
        struct i915_request *rq;
        struct ttm_tt *src_ttm = bo->ttm;
-       enum i915_cache_level src_level, dst_level;
+       unsigned int src_pat, dst_pat;
        int ret;
 
        if (!to_gt(i915)->migrate.context || intel_gt_is_wedged(to_gt(i915)))
@@ -206,16 +216,15 @@ static struct dma_fence *i915_ttm_accel_move(struct 
ttm_buffer_object *bo,
        if (I915_SELFTEST_ONLY(fail_gpu_migration))
                clear = true;
 
-       dst_level = i915_ttm_cache_level(i915, dst_mem, dst_ttm);
+       dst_pat = i915_ttm_cache_pat(i915, dst_mem, dst_ttm);
        if (clear) {
                if (bo->type == ttm_bo_type_kernel &&
                    !I915_SELFTEST_ONLY(fail_gpu_migration))
                        return ERR_PTR(-EINVAL);
 
                intel_engine_pm_get(to_gt(i915)->migrate.context->engine);
-               ret = intel_context_migrate_clear(to_gt(i915)->migrate.context, 
deps,
-                                                 dst_st->sgl,
-                                                 i915_gem_get_pat_index(i915, 
dst_level),
+               ret = intel_context_migrate_clear(to_gt(i915)->migrate.context,
+                                                 deps, dst_st->sgl, dst_pat,
                                                  
i915_ttm_gtt_binds_lmem(dst_mem),
                                                  0, &rq);
        } else {
@@ -225,14 +234,13 @@ static struct dma_fence *i915_ttm_accel_move(struct 
ttm_buffer_object *bo,
                if (IS_ERR(src_rsgt))
                        return ERR_CAST(src_rsgt);
 
-               src_level = i915_ttm_cache_level(i915, bo->resource, src_ttm);
+               src_pat = i915_ttm_cache_pat(i915, bo->resource, src_ttm);
                intel_engine_pm_get(to_gt(i915)->migrate.context->engine);
                ret = intel_context_migrate_copy(to_gt(i915)->migrate.context,
                                                 deps, src_rsgt->table.sgl,
-                                                i915_gem_get_pat_index(i915, 
src_level),
+                                                src_pat,
                                                 
i915_ttm_gtt_binds_lmem(bo->resource),
-                                                dst_st->sgl,
-                                                i915_gem_get_pat_index(i915, 
dst_level),
+                                                dst_st->sgl, dst_pat,
                                                 
i915_ttm_gtt_binds_lmem(dst_mem),
                                                 &rq);
 
diff --git a/drivers/gpu/drm/i915/gem/selftests/huge_pages.c 
b/drivers/gpu/drm/i915/gem/selftests/huge_pages.c
index 6b9f6cf50bf6..6bddd733d796 100644
--- a/drivers/gpu/drm/i915/gem/selftests/huge_pages.c
+++ b/drivers/gpu/drm/i915/gem/selftests/huge_pages.c
@@ -354,7 +354,7 @@ fake_huge_pages_object(struct drm_i915_private *i915, u64 
size, bool single)
 
        obj->write_domain = I915_GEM_DOMAIN_CPU;
        obj->read_domains = I915_GEM_DOMAIN_CPU;
-       obj->pat_index = i915_gem_get_pat_index(i915, I915_CACHE_NONE);
+       obj->pat_index = i915->pat_uc;
 
        return obj;
 }
diff --git a/drivers/gpu/drm/i915/gt/gen6_ppgtt.c 
b/drivers/gpu/drm/i915/gt/gen6_ppgtt.c
index c2bdc133c89a..fb69f667652a 100644
--- a/drivers/gpu/drm/i915/gt/gen6_ppgtt.c
+++ b/drivers/gpu/drm/i915/gt/gen6_ppgtt.c
@@ -226,9 +226,7 @@ static int gen6_ppgtt_init_scratch(struct gen6_ppgtt *ppgtt)
                return ret;
 
        vm->scratch[0]->encode =
-               vm->pte_encode(px_dma(vm->scratch[0]),
-                              i915_gem_get_pat_index(vm->i915,
-                                                     I915_CACHE_NONE),
+               vm->pte_encode(px_dma(vm->scratch[0]), vm->i915->pat_uc,
                               PTE_READ_ONLY);
 
        vm->scratch[1] = vm->alloc_pt_dma(vm, I915_GTT_PAGE_SIZE_4K);
diff --git a/drivers/gpu/drm/i915/gt/gen8_ppgtt.c 
b/drivers/gpu/drm/i915/gt/gen8_ppgtt.c
index 862ac1d2de25..675f71f06e89 100644
--- a/drivers/gpu/drm/i915/gt/gen8_ppgtt.c
+++ b/drivers/gpu/drm/i915/gt/gen8_ppgtt.c
@@ -874,9 +874,7 @@ static int gen8_init_scratch(struct i915_address_space *vm)
                pte_flags |= PTE_LM;
 
        vm->scratch[0]->encode =
-               vm->pte_encode(px_dma(vm->scratch[0]),
-                              i915_gem_get_pat_index(vm->i915,
-                                                     I915_CACHE_NONE),
+               vm->pte_encode(px_dma(vm->scratch[0]), vm->i915->pat_uc,
                               pte_flags);
 
        for (i = 1; i <= vm->top; i++) {
diff --git a/drivers/gpu/drm/i915/gt/intel_ggtt.c 
b/drivers/gpu/drm/i915/gt/intel_ggtt.c
index dd0ed941441a..fca61ddca8ad 100644
--- a/drivers/gpu/drm/i915/gt/intel_ggtt.c
+++ b/drivers/gpu/drm/i915/gt/intel_ggtt.c
@@ -921,9 +921,7 @@ static int ggtt_probe_common(struct i915_ggtt *ggtt, u64 
size)
                pte_flags |= PTE_LM;
 
        ggtt->vm.scratch[0]->encode =
-               ggtt->vm.pte_encode(px_dma(ggtt->vm.scratch[0]),
-                                   i915_gem_get_pat_index(i915,
-                                                          I915_CACHE_NONE),
+               ggtt->vm.pte_encode(px_dma(ggtt->vm.scratch[0]), i915->pat_uc,
                                    pte_flags);
 
        return 0;
@@ -1298,9 +1296,7 @@ bool i915_ggtt_resume_vm(struct i915_address_space *vm)
                 */
                vma->resource->bound_flags = 0;
                vma->ops->bind_vma(vm, NULL, vma->resource,
-                                  obj ? obj->pat_index :
-                                        i915_gem_get_pat_index(vm->i915,
-                                                               
I915_CACHE_NONE),
+                                  obj ? obj->pat_index : vm->i915->pat_uc,
                                   was_bound);
 
                if (obj) { /* only used during resume => exclusive access */
diff --git a/drivers/gpu/drm/i915/gt/intel_migrate.c 
b/drivers/gpu/drm/i915/gt/intel_migrate.c
index 576e5ef0289b..b7a61b02f64c 100644
--- a/drivers/gpu/drm/i915/gt/intel_migrate.c
+++ b/drivers/gpu/drm/i915/gt/intel_migrate.c
@@ -45,9 +45,7 @@ static void xehpsdv_toggle_pdes(struct i915_address_space *vm,
         * Insert a dummy PTE into every PT that will map to LMEM to ensure
         * we have a correctly setup PDE structure for later use.
         */
-       vm->insert_page(vm, 0, d->offset,
-                       i915_gem_get_pat_index(vm->i915, I915_CACHE_NONE),
-                       PTE_LM);
+       vm->insert_page(vm, 0, d->offset, vm->i915->pat_uc, PTE_LM);
        GEM_BUG_ON(!pt->is_compact);
        d->offset += SZ_2M;
 }
@@ -65,9 +63,7 @@ static void xehpsdv_insert_pte(struct i915_address_space *vm,
         * alignment is 64K underneath for the pt, and we are careful
         * not to access the space in the void.
         */
-       vm->insert_page(vm, px_dma(pt), d->offset,
-                       i915_gem_get_pat_index(vm->i915, I915_CACHE_NONE),
-                       PTE_LM);
+       vm->insert_page(vm, px_dma(pt), d->offset, vm->i915->pat_uc, PTE_LM);
        d->offset += SZ_64K;
 }
 
@@ -77,8 +73,7 @@ static void insert_pte(struct i915_address_space *vm,
 {
        struct insert_pte_data *d = data;
 
-       vm->insert_page(vm, px_dma(pt), d->offset,
-                       i915_gem_get_pat_index(vm->i915, I915_CACHE_NONE),
+       vm->insert_page(vm, px_dma(pt), d->offset, vm->i915->pat_uc,
                        i915_gem_object_is_lmem(pt->base) ? PTE_LM : 0);
        d->offset += PAGE_SIZE;
 }
diff --git a/drivers/gpu/drm/i915/gt/selftest_migrate.c 
b/drivers/gpu/drm/i915/gt/selftest_migrate.c
index 3def5ca72dec..a67ede65d816 100644
--- a/drivers/gpu/drm/i915/gt/selftest_migrate.c
+++ b/drivers/gpu/drm/i915/gt/selftest_migrate.c
@@ -904,8 +904,7 @@ static int perf_clear_blt(void *arg)
 
                err = __perf_clear_blt(gt->migrate.context,
                                       dst->mm.pages->sgl,
-                                      i915_gem_get_pat_index(gt->i915,
-                                                             I915_CACHE_NONE),
+                                      gt->i915->pat_uc,
                                       i915_gem_object_is_lmem(dst),
                                       sizes[i]);
 
@@ -995,12 +994,10 @@ static int perf_copy_blt(void *arg)
 
                err = __perf_copy_blt(gt->migrate.context,
                                      src->mm.pages->sgl,
-                                     i915_gem_get_pat_index(gt->i915,
-                                                            I915_CACHE_NONE),
+                                     gt->i915->pat_uc,
                                      i915_gem_object_is_lmem(src),
                                      dst->mm.pages->sgl,
-                                     i915_gem_get_pat_index(gt->i915,
-                                                            I915_CACHE_NONE),
+                                     gt->i915->pat_uc,
                                      i915_gem_object_is_lmem(dst),
                                      sz);
 
diff --git a/drivers/gpu/drm/i915/gt/selftest_reset.c 
b/drivers/gpu/drm/i915/gt/selftest_reset.c
index 79aa6ac66ad2..327dc9294e0f 100644
--- a/drivers/gpu/drm/i915/gt/selftest_reset.c
+++ b/drivers/gpu/drm/i915/gt/selftest_reset.c
@@ -84,11 +84,8 @@ __igt_reset_stolen(struct intel_gt *gt,
                void __iomem *s;
                void *in;
 
-               ggtt->vm.insert_page(&ggtt->vm, dma,
-                                    ggtt->error_capture.start,
-                                    i915_gem_get_pat_index(gt->i915,
-                                                           I915_CACHE_NONE),
-                                    0);
+               ggtt->vm.insert_page(&ggtt->vm, dma, ggtt->error_capture.start,
+                                    gt->i915->pat_uc, 0);
                mb();
 
                s = io_mapping_map_wc(&ggtt->iomap,
@@ -127,11 +124,8 @@ __igt_reset_stolen(struct intel_gt *gt,
                void *in;
                u32 x;
 
-               ggtt->vm.insert_page(&ggtt->vm, dma,
-                                    ggtt->error_capture.start,
-                                    i915_gem_get_pat_index(gt->i915,
-                                                           I915_CACHE_NONE),
-                                    0);
+               ggtt->vm.insert_page(&ggtt->vm, dma, ggtt->error_capture.start,
+                                    gt->i915->pat_uc, 0);
                mb();
 
                s = io_mapping_map_wc(&ggtt->iomap,
diff --git a/drivers/gpu/drm/i915/gt/selftest_tlb.c 
b/drivers/gpu/drm/i915/gt/selftest_tlb.c
index 3bd6b540257b..6049f01be219 100644
--- a/drivers/gpu/drm/i915/gt/selftest_tlb.c
+++ b/drivers/gpu/drm/i915/gt/selftest_tlb.c
@@ -36,8 +36,6 @@ pte_tlbinv(struct intel_context *ce,
           u64 length,
           struct rnd_state *prng)
 {
-       const unsigned int pat_index =
-               i915_gem_get_pat_index(ce->vm->i915, I915_CACHE_NONE);
        struct drm_i915_gem_object *batch;
        struct drm_mm_node vb_node;
        struct i915_request *rq;
@@ -157,7 +155,8 @@ pte_tlbinv(struct intel_context *ce,
                /* Flip the PTE between A and B */
                if (i915_gem_object_is_lmem(vb->obj))
                        pte_flags |= PTE_LM;
-               ce->vm->insert_entries(ce->vm, &vb_res, pat_index, pte_flags);
+               ce->vm->insert_entries(ce->vm, &vb_res, ce->vm->i915->pat_uc,
+                                      pte_flags);
 
                /* Flush the PTE update to concurrent HW */
                tlbinv(ce->vm, addr & -length, length);
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_uc_fw.c 
b/drivers/gpu/drm/i915/gt/uc/intel_uc_fw.c
index 7aadad5639c3..8b7aa8c5a99d 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_uc_fw.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_uc_fw.c
@@ -1053,14 +1053,10 @@ static void uc_fw_bind_ggtt(struct intel_uc_fw *uc_fw)
 
        if (ggtt->vm.raw_insert_entries)
                ggtt->vm.raw_insert_entries(&ggtt->vm, vma_res,
-                                           
i915_gem_get_pat_index(ggtt->vm.i915,
-                                                                  
I915_CACHE_NONE),
-                                           pte_flags);
+                                           ggtt->vm.i915->pat_uc, pte_flags);
        else
                ggtt->vm.insert_entries(&ggtt->vm, vma_res,
-                                       i915_gem_get_pat_index(ggtt->vm.i915,
-                                                              I915_CACHE_NONE),
-                                       pte_flags);
+                                       ggtt->vm.i915->pat_uc, pte_flags);
 }
 
 static void uc_fw_unbind_ggtt(struct intel_uc_fw *uc_fw)
diff --git a/drivers/gpu/drm/i915/i915_cache.c 
b/drivers/gpu/drm/i915/i915_cache.c
new file mode 100644
index 000000000000..06eb5933c719
--- /dev/null
+++ b/drivers/gpu/drm/i915/i915_cache.c
@@ -0,0 +1,18 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2023 Intel Corporation
+ */
+
+#include "i915_cache.h"
+#include "i915_drv.h"
+
+void i915_cache_init(struct drm_i915_private *i915)
+{
+       i915->pat_uc = i915_gem_get_pat_index(i915, I915_CACHE_NONE);
+       drm_info(&i915->drm, "Using PAT index %u for uncached access\n",
+                i915->pat_uc);
+
+       i915->pat_wb = i915_gem_get_pat_index(i915, I915_CACHE_LLC);
+       drm_info(&i915->drm, "Using PAT index %u for write-back access\n",
+                i915->pat_wb);
+}
diff --git a/drivers/gpu/drm/i915/i915_cache.h 
b/drivers/gpu/drm/i915/i915_cache.h
new file mode 100644
index 000000000000..cb68936fb8a2
--- /dev/null
+++ b/drivers/gpu/drm/i915/i915_cache.h
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2023 Intel Corporation
+ */
+
+#ifndef __I915_CACHE_H__
+#define __I915_CACHE_H__
+
+struct drm_i915_private;
+
+void i915_cache_init(struct drm_i915_private *i915);
+
+#endif /* __I915_CACHE_H__ */
diff --git a/drivers/gpu/drm/i915/i915_driver.c 
b/drivers/gpu/drm/i915/i915_driver.c
index 294b022de22b..bb2223cc3470 100644
--- a/drivers/gpu/drm/i915/i915_driver.c
+++ b/drivers/gpu/drm/i915/i915_driver.c
@@ -80,6 +80,7 @@
 #include "soc/intel_dram.h"
 #include "soc/intel_gmch.h"
 
+#include "i915_cache.h"
 #include "i915_debugfs.h"
 #include "i915_driver.h"
 #include "i915_drm_client.h"
@@ -240,6 +241,8 @@ static int i915_driver_early_probe(struct drm_i915_private 
*dev_priv)
        i915_memcpy_init_early(dev_priv);
        intel_runtime_pm_init_early(&dev_priv->runtime_pm);
 
+       i915_cache_init(dev_priv);
+
        ret = i915_workqueues_init(dev_priv);
        if (ret < 0)
                return ret;
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 682ef2b5c7d5..f5c591a762df 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -250,6 +250,8 @@ struct drm_i915_private {
        unsigned int hpll_freq;
        unsigned int czclk_freq;
 
+       unsigned int pat_uc, pat_wb;
+
        /**
         * wq - Driver workqueue for GEM.
         *
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 1f65bb33dd21..896aa48ed089 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -422,9 +422,7 @@ i915_gem_gtt_pread(struct drm_i915_gem_object *obj,
                        ggtt->vm.insert_page(&ggtt->vm,
                                             
i915_gem_object_get_dma_address(obj,
                                                                             
offset >> PAGE_SHIFT),
-                                            node.start,
-                                            i915_gem_get_pat_index(i915,
-                                                                   
I915_CACHE_NONE), 0);
+                                            node.start, i915->pat_uc, 0);
                } else {
                        page_base += offset & PAGE_MASK;
                }
@@ -603,9 +601,7 @@ i915_gem_gtt_pwrite_fast(struct drm_i915_gem_object *obj,
                        ggtt->vm.insert_page(&ggtt->vm,
                                             
i915_gem_object_get_dma_address(obj,
                                                                             
offset >> PAGE_SHIFT),
-                                            node.start,
-                                            i915_gem_get_pat_index(i915,
-                                                                   
I915_CACHE_NONE), 0);
+                                            node.start, i915->pat_uc, 0);
                        wmb(); /* flush modifications to the GGTT (insert_page) 
*/
                } else {
                        page_base += offset & PAGE_MASK;
diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c 
b/drivers/gpu/drm/i915/i915_gpu_error.c
index 4008bb09fdb5..31975a79730c 100644
--- a/drivers/gpu/drm/i915/i915_gpu_error.c
+++ b/drivers/gpu/drm/i915/i915_gpu_error.c
@@ -1124,14 +1124,10 @@ i915_vma_coredump_create(const struct intel_gt *gt,
                        mutex_lock(&ggtt->error_mutex);
                        if (ggtt->vm.raw_insert_page)
                                ggtt->vm.raw_insert_page(&ggtt->vm, dma, slot,
-                                                        
i915_gem_get_pat_index(gt->i915,
-                                                                               
I915_CACHE_NONE),
-                                                        0);
+                                                        gt->i915->pat_uc, 0);
                        else
                                ggtt->vm.insert_page(&ggtt->vm, dma, slot,
-                                                    
i915_gem_get_pat_index(gt->i915,
-                                                                           
I915_CACHE_NONE),
-                                                    0);
+                                                    gt->i915->pat_uc, 0);
                        mb();
 
                        s = io_mapping_map_wc(&ggtt->iomap, slot, PAGE_SIZE);
diff --git a/drivers/gpu/drm/i915/selftests/i915_gem.c 
b/drivers/gpu/drm/i915/selftests/i915_gem.c
index 61da4ed9d521..e620f73793a5 100644
--- a/drivers/gpu/drm/i915/selftests/i915_gem.c
+++ b/drivers/gpu/drm/i915/selftests/i915_gem.c
@@ -57,10 +57,7 @@ static void trash_stolen(struct drm_i915_private *i915)
                u32 __iomem *s;
                int x;
 
-               ggtt->vm.insert_page(&ggtt->vm, dma, slot,
-                                    i915_gem_get_pat_index(i915,
-                                                           I915_CACHE_NONE),
-                                    0);
+               ggtt->vm.insert_page(&ggtt->vm, dma, slot, i915->pat_uc, 0);
 
                s = io_mapping_map_atomic_wc(&ggtt->iomap, slot);
                for (x = 0; x < PAGE_SIZE / sizeof(u32); x++) {
diff --git a/drivers/gpu/drm/i915/selftests/i915_gem_evict.c 
b/drivers/gpu/drm/i915/selftests/i915_gem_evict.c
index f8fe3681c3dc..f910ec9b6d2b 100644
--- a/drivers/gpu/drm/i915/selftests/i915_gem_evict.c
+++ b/drivers/gpu/drm/i915/selftests/i915_gem_evict.c
@@ -246,7 +246,7 @@ static int igt_evict_for_cache_color(void *arg)
        struct drm_mm_node target = {
                .start = I915_GTT_PAGE_SIZE * 2,
                .size = I915_GTT_PAGE_SIZE,
-               .color = i915_gem_get_pat_index(gt->i915, I915_CACHE_LLC),
+               .color = gt->i915->pat_wb,
        };
        struct drm_i915_gem_object *obj;
        struct i915_vma *vma;
@@ -309,7 +309,7 @@ static int igt_evict_for_cache_color(void *arg)
        /* Attempt to remove the first *pinned* vma, by removing the (empty)
         * neighbour -- this should fail.
         */
-       target.color = i915_gem_get_pat_index(gt->i915, I915_CACHE_L3_LLC);
+       target.color = gt->i915->pat_uc;
 
        mutex_lock(&ggtt->vm.mutex);
        err = i915_gem_evict_for_node(&ggtt->vm, NULL, &target, 0);
diff --git a/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c 
b/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c
index 5c397a2df70e..c96b7f7d7853 100644
--- a/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c
@@ -135,7 +135,7 @@ fake_dma_object(struct drm_i915_private *i915, u64 size)
 
        obj->write_domain = I915_GEM_DOMAIN_CPU;
        obj->read_domains = I915_GEM_DOMAIN_CPU;
-       obj->pat_index = i915_gem_get_pat_index(i915, I915_CACHE_NONE);
+       obj->pat_index = i915->pat_uc;
 
        /* Preallocate the "backing storage" */
        if (i915_gem_object_pin_pages_unlocked(obj))
@@ -358,9 +358,7 @@ static int lowlevel_hole(struct i915_address_space *vm,
                        mock_vma_res->start = addr;
 
                        with_intel_runtime_pm(vm->gt->uncore->rpm, wakeref)
-                         vm->insert_entries(vm, mock_vma_res,
-                                            i915_gem_get_pat_index(vm->i915,
-                                                                   
I915_CACHE_NONE),
+                         vm->insert_entries(vm, mock_vma_res, vm->i915->pat_uc,
                                             0);
                }
                count = n;
@@ -1379,10 +1377,7 @@ static int igt_ggtt_page(void *arg)
 
                ggtt->vm.insert_page(&ggtt->vm,
                                     i915_gem_object_get_dma_address(obj, 0),
-                                    offset,
-                                    i915_gem_get_pat_index(i915,
-                                                           I915_CACHE_NONE),
-                                    0);
+                                    offset, i915->pat_uc, 0);
        }
 
        order = i915_random_order(count, &prng);
diff --git a/drivers/gpu/drm/i915/selftests/intel_memory_region.c 
b/drivers/gpu/drm/i915/selftests/intel_memory_region.c
index d985d9bae2e8..b82fe0ef8cd7 100644
--- a/drivers/gpu/drm/i915/selftests/intel_memory_region.c
+++ b/drivers/gpu/drm/i915/selftests/intel_memory_region.c
@@ -1070,9 +1070,7 @@ static int igt_lmem_write_cpu(void *arg)
        /* Put the pages into a known state -- from the gpu for added fun */
        intel_engine_pm_get(engine);
        err = intel_context_migrate_clear(engine->gt->migrate.context, NULL,
-                                         obj->mm.pages->sgl,
-                                         i915_gem_get_pat_index(i915,
-                                                                
I915_CACHE_NONE),
+                                         obj->mm.pages->sgl, i915->pat_uc,
                                          true, 0xdeadbeaf, &rq);
        if (rq) {
                dma_resv_add_fence(obj->base.resv, &rq->fence,
diff --git a/drivers/gpu/drm/i915/selftests/mock_gem_device.c 
b/drivers/gpu/drm/i915/selftests/mock_gem_device.c
index da0b269606c5..1d1a457e2aee 100644
--- a/drivers/gpu/drm/i915/selftests/mock_gem_device.c
+++ b/drivers/gpu/drm/i915/selftests/mock_gem_device.c
@@ -181,6 +181,8 @@ struct drm_i915_private *mock_gem_device(void)
        /* Set up device info and initial runtime info. */
        intel_device_info_driver_create(i915, pdev->device, &mock_info);
 
+       i915_cache_init(i915);
+
        dev_pm_domain_set(&pdev->dev, &pm_domain);
        pm_runtime_enable(&pdev->dev);
        pm_runtime_dont_use_autosuspend(&pdev->dev);
-- 
2.39.2

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