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Subject[PATCH v2 3/8] drm/i915: setup ggtt scratch page after memory regions
Date
Reorder scratch page allocation so that memory regions are available
to allocate the buffers

Signed-off-by: Robert Beckett <bob.beckett@collabora.com>
Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
---
drivers/gpu/drm/i915/gt/intel_gt_gmch.c | 20 ++++++++++++++++++--
drivers/gpu/drm/i915/gt/intel_gt_gmch.h | 6 ++++++
drivers/gpu/drm/i915/i915_driver.c | 16 ++++++++++------
3 files changed, 34 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_gt_gmch.c b/drivers/gpu/drm/i915/gt/intel_gt_gmch.c
index 18e488672d1b..5411df1734ac 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt_gmch.c
+++ b/drivers/gpu/drm/i915/gt/intel_gt_gmch.c
@@ -440,8 +440,6 @@ static int ggtt_probe_common(struct i915_ggtt *ggtt, u64 size)
struct drm_i915_private *i915 = ggtt->vm.i915;
struct pci_dev *pdev = to_pci_dev(i915->drm.dev);
phys_addr_t phys_addr;
- u32 pte_flags;
- int ret;

GEM_WARN_ON(pci_resource_len(pdev, 0) != gen6_gttmmadr_size(i915));
phys_addr = pci_resource_start(pdev, 0) + gen6_gttadr_offset(i915);
@@ -463,6 +461,24 @@ static int ggtt_probe_common(struct i915_ggtt *ggtt, u64 size)
}

kref_init(&ggtt->vm.resv_ref);
+
+ return 0;
+}
+
+/**
+ * i915_ggtt_setup_scratch_page - setup ggtt scratch page
+ * @i915: i915 device
+ */
+int i915_ggtt_setup_scratch_page(struct drm_i915_private *i915)
+{
+ struct i915_ggtt *ggtt = to_gt(i915)->ggtt;
+ u32 pte_flags;
+ int ret;
+
+ /* gen5- scratch setup currently happens in @intel_gtt_init */
+ if (GRAPHICS_VER(i915) <= 5)
+ return 0;
+
ret = setup_scratch_page(&ggtt->vm);
if (ret) {
drm_err(&i915->drm, "Scratch setup failed\n");
diff --git a/drivers/gpu/drm/i915/gt/intel_gt_gmch.h b/drivers/gpu/drm/i915/gt/intel_gt_gmch.h
index 75ed55c1f30a..c6b79cb78637 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt_gmch.h
+++ b/drivers/gpu/drm/i915/gt/intel_gt_gmch.h
@@ -15,6 +15,7 @@ int intel_gt_gmch_gen6_probe(struct i915_ggtt *ggtt);
int intel_gt_gmch_gen8_probe(struct i915_ggtt *ggtt);
int intel_gt_gmch_gen5_probe(struct i915_ggtt *ggtt);
int intel_gt_gmch_gen5_enable_hw(struct drm_i915_private *i915);
+int i915_ggtt_setup_scratch_page(struct drm_i915_private *i915);

/* Stubs for non-x86 platforms */
#else
@@ -41,6 +42,11 @@ static inline int intel_gt_gmch_gen5_enable_hw(struct drm_i915_private *i915)
/* No HW should be enabled for this case yet, return fail */
return -ENODEV;
}
+
+static inline int i915_ggtt_setup_scratch_page(struct drm_i915_private *i915)
+{
+ return 0;
+}
#endif

#endif /* __INTEL_GT_GMCH_H__ */
diff --git a/drivers/gpu/drm/i915/i915_driver.c b/drivers/gpu/drm/i915/i915_driver.c
index d26dcca7e654..4e8a92ffbfe9 100644
--- a/drivers/gpu/drm/i915/i915_driver.c
+++ b/drivers/gpu/drm/i915/i915_driver.c
@@ -69,6 +69,7 @@
#include "gem/i915_gem_mman.h"
#include "gem/i915_gem_pm.h"
#include "gt/intel_gt.h"
+#include "gt/intel_gt_gmch.h"
#include "gt/intel_gt_pm.h"
#include "gt/intel_rc6.h"

@@ -605,12 +606,16 @@ static int i915_driver_hw_probe(struct drm_i915_private *dev_priv)

ret = intel_gt_tiles_init(dev_priv);
if (ret)
- goto err_mem_regions;
+ goto err_ggtt;
+
+ ret = i915_ggtt_setup_scratch_page(dev_priv);
+ if (ret)
+ goto err_ggtt;

ret = i915_ggtt_enable_hw(dev_priv);
if (ret) {
drm_err(&dev_priv->drm, "failed to enable GGTT\n");
- goto err_mem_regions;
+ goto err_ggtt;
}

pci_set_master(pdev);
@@ -662,11 +667,10 @@ static int i915_driver_hw_probe(struct drm_i915_private *dev_priv)
err_msi:
if (pdev->msi_enabled)
pci_disable_msi(pdev);
-err_mem_regions:
- intel_memory_regions_driver_release(dev_priv);
err_ggtt:
i915_ggtt_driver_release(dev_priv);
i915_gem_drain_freed_objects(dev_priv);
+ intel_memory_regions_driver_release(dev_priv);
i915_ggtt_driver_late_release(dev_priv);
err_perf:
i915_perf_fini(dev_priv);
@@ -912,9 +916,9 @@ int i915_driver_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
intel_modeset_driver_remove_nogem(i915);
out_cleanup_hw:
i915_driver_hw_remove(i915);
- intel_memory_regions_driver_release(i915);
i915_ggtt_driver_release(i915);
i915_gem_drain_freed_objects(i915);
+ intel_memory_regions_driver_release(i915);
i915_ggtt_driver_late_release(i915);
out_cleanup_mmio:
i915_driver_mmio_release(i915);
@@ -971,9 +975,9 @@ static void i915_driver_release(struct drm_device *dev)

i915_gem_driver_release(dev_priv);

- intel_memory_regions_driver_release(dev_priv);
i915_ggtt_driver_release(dev_priv);
i915_gem_drain_freed_objects(dev_priv);
+ intel_memory_regions_driver_release(dev_priv);
i915_ggtt_driver_late_release(dev_priv);

i915_driver_mmio_release(dev_priv);
--
2.25.1
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