[Intel-gfx] [PATCH v3 2/5] drm/i915/guc: Move the pin bias value from GuC to GGTT
Jakub Bartmiński
jakub.bartminski at intel.com
Thu Jul 19 08:35:39 UTC 2018
Removing the pin bias from GuC allows us to not check for GuC every time
we pin a context, which fixes the assertion error on unresolved GuC
platform default in mock contexts selftest.
With this change the intel_guc_ggtt_offset function has to know the full
declaration of the drm_i915_private structure so it can no longer be
located in the intel_guc.h header file due to include order.
v2:
This also makes it so that there's no need to set GuC variables from
within the WOPCM init function or to move the WOPCM init, while keeping
the correct initialization order. Also for mock tests the pin bias is
left at 0 and we make sure that the pin bias with GuC will not be
smaller than without GuC.
v3:
Avoid unused i915 in intel_guc_ggtt_offset if debug is disabled.
Testcase: igt/drv_selftest/mock_contexts #GuC
Signed-off-by: Jakub Bartmiński <jakub.bartminski at intel.com>
Cc: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Michał Winiarski <michal.winiarski at intel.com>
Cc: Michal Wajdeczko <michal.wajdeczko at intel.com>
---
drivers/gpu/drm/i915/i915_gem_context.c | 10 +-------
drivers/gpu/drm/i915/i915_gem_gtt.c | 22 ++++++++++++----
drivers/gpu/drm/i915/i915_gem_gtt.h | 2 ++
drivers/gpu/drm/i915/intel_guc.c | 31 ++++++++++++++++++++---
drivers/gpu/drm/i915/intel_guc.h | 28 +-------------------
drivers/gpu/drm/i915/intel_huc.c | 2 +-
drivers/gpu/drm/i915/intel_uc_fw.c | 2 +-
drivers/gpu/drm/i915/intel_wopcm.c | 19 --------------
drivers/gpu/drm/i915/intel_wopcm.h | 8 ++++++
drivers/gpu/drm/i915/selftests/mock_gtt.c | 2 ++
10 files changed, 60 insertions(+), 66 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c
index b10770cfccd2..32f96b8cd9c4 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/i915_gem_context.c
@@ -329,15 +329,7 @@ __create_hw_context(struct drm_i915_private *dev_priv,
ctx->desc_template =
default_desc_template(dev_priv, dev_priv->mm.aliasing_ppgtt);
- /*
- * GuC requires the ring to be placed in Non-WOPCM memory. If GuC is not
- * present or not in use we still need a small bias as ring wraparound
- * at offset 0 sometimes hangs. No idea why.
- */
- if (USES_GUC(dev_priv))
- ctx->ggtt_offset_bias = dev_priv->guc.ggtt_pin_bias;
- else
- ctx->ggtt_offset_bias = I915_GTT_PAGE_SIZE;
+ ctx->ggtt_offset_bias = dev_priv->ggtt.pin_bias;
return ctx;
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index d0acef299b9c..a61344379832 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -2901,7 +2901,7 @@ void i915_gem_fini_aliasing_ppgtt(struct drm_i915_private *i915)
ggtt->vm.vma_ops.unbind_vma = ggtt_unbind_vma;
}
-int i915_gem_init_ggtt(struct drm_i915_private *dev_priv)
+int i915_gem_init_ggtt(struct drm_i915_private *i915)
{
/* Let GEM Manage all of the aperture.
*
@@ -2912,12 +2912,24 @@ int i915_gem_init_ggtt(struct drm_i915_private *dev_priv)
* aperture. One page should be enough to keep any prefetching inside
* of the aperture.
*/
- struct i915_ggtt *ggtt = &dev_priv->ggtt;
+ struct i915_ggtt *ggtt = &i915->ggtt;
unsigned long hole_start, hole_end;
struct drm_mm_node *entry;
int ret;
- ret = intel_vgt_balloon(dev_priv);
+ /*
+ * We need a small bias as ring wraparound at offset 0
+ * sometimes hangs. No idea why.
+ */
+ ggtt->pin_bias = I915_GTT_PAGE_SIZE;
+
+ /* Any objects shared with GuC can't overlap with WOPCM. */
+ if (USES_GUC(i915)) {
+ ggtt->pin_bias = max(ggtt->pin_bias,
+ intel_wopcm_get_pin_bias(&i915->wopcm));
+ }
+
+ ret = intel_vgt_balloon(i915);
if (ret)
return ret;
@@ -2940,8 +2952,8 @@ int i915_gem_init_ggtt(struct drm_i915_private *dev_priv)
/* And finally clear the reserved guard page */
ggtt->vm.clear_range(&ggtt->vm, ggtt->vm.total - PAGE_SIZE, PAGE_SIZE);
- if (USES_PPGTT(dev_priv) && !USES_FULL_PPGTT(dev_priv)) {
- ret = i915_gem_init_aliasing_ppgtt(dev_priv);
+ if (USES_PPGTT(i915) && !USES_FULL_PPGTT(i915)) {
+ ret = i915_gem_init_aliasing_ppgtt(i915);
if (ret)
goto err;
}
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.h b/drivers/gpu/drm/i915/i915_gem_gtt.h
index 14e62651010b..71e8cf24c800 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.h
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.h
@@ -396,6 +396,8 @@ struct i915_ggtt {
int mtrr;
+ u32 pin_bias;
+
struct drm_mm_node error_capture;
};
diff --git a/drivers/gpu/drm/i915/intel_guc.c b/drivers/gpu/drm/i915/intel_guc.c
index 47cacd59ac32..e069573eb08c 100644
--- a/drivers/gpu/drm/i915/intel_guc.c
+++ b/drivers/gpu/drm/i915/intel_guc.c
@@ -607,6 +607,29 @@ int intel_guc_resume(struct intel_guc *guc)
* actual GuC WOPCM size.
*/
+/**
+ * intel_guc_ggtt_offset() - Get and validate the GGTT offset of @vma
+ * @guc: intel_guc structure.
+ * @vma: i915 graphics virtual memory area.
+ *
+ * GuC does not allow any gfx GGTT address that falls into range
+ * [0, ggtt.pin_bias), which is reserved for Boot ROM, SRAM and WOPCM.
+ * Currently, in order to exclude [0, ggtt.pin_bias) address space from
+ * GGTT, all gfx objects used by GuC are allocated with intel_guc_allocate_vma()
+ * and pinned with PIN_OFFSET_BIAS along with the value of ggtt.pin_bias.
+ *
+ * Return: GGTT offset of the @vma.
+ */
+u32 intel_guc_ggtt_offset(struct intel_guc *guc, struct i915_vma *vma)
+{
+ u32 offset = i915_ggtt_offset(vma);
+
+ GEM_BUG_ON(offset < i915_vm_to_ggtt(vma->vm)->pin_bias);
+ GEM_BUG_ON(range_overflows_t(u64, offset, vma->size, GUC_GGTT_TOP));
+
+ return offset;
+}
+
/**
* intel_guc_allocate_vma() - Allocate a GGTT VMA for GuC usage
* @guc: the guc
@@ -622,21 +645,21 @@ int intel_guc_resume(struct intel_guc *guc)
*/
struct i915_vma *intel_guc_allocate_vma(struct intel_guc *guc, u32 size)
{
- struct drm_i915_private *dev_priv = guc_to_i915(guc);
+ struct drm_i915_private *i915 = guc_to_i915(guc);
struct drm_i915_gem_object *obj;
struct i915_vma *vma;
int ret;
- obj = i915_gem_object_create(dev_priv, size);
+ obj = i915_gem_object_create(i915, size);
if (IS_ERR(obj))
return ERR_CAST(obj);
- vma = i915_vma_instance(obj, &dev_priv->ggtt.vm, NULL);
+ vma = i915_vma_instance(obj, &i915->ggtt.vm, NULL);
if (IS_ERR(vma))
goto err;
ret = i915_vma_pin(vma, 0, PAGE_SIZE,
- PIN_GLOBAL | PIN_OFFSET_BIAS | guc->ggtt_pin_bias);
+ PIN_GLOBAL | PIN_OFFSET_BIAS | i915->ggtt.pin_bias);
if (ret) {
vma = ERR_PTR(ret);
goto err;
diff --git a/drivers/gpu/drm/i915/intel_guc.h b/drivers/gpu/drm/i915/intel_guc.h
index 4121928a495e..b0e5c99c0338 100644
--- a/drivers/gpu/drm/i915/intel_guc.h
+++ b/drivers/gpu/drm/i915/intel_guc.h
@@ -49,9 +49,6 @@ struct intel_guc {
struct intel_guc_log log;
struct intel_guc_ct ct;
- /* Offset where Non-WOPCM memory starts. */
- u32 ggtt_pin_bias;
-
/* Log snapshot if GuC errors during load */
struct drm_i915_gem_object *load_err_log;
@@ -123,30 +120,7 @@ static inline void intel_guc_to_host_event_handler(struct intel_guc *guc)
/* GuC addresses above GUC_GGTT_TOP also don't map through the GTT */
#define GUC_GGTT_TOP 0xFEE00000
-
-/**
- * intel_guc_ggtt_offset() - Get and validate the GGTT offset of @vma
- * @guc: intel_guc structure.
- * @vma: i915 graphics virtual memory area.
- *
- * GuC does not allow any gfx GGTT address that falls into range
- * [0, GuC ggtt_pin_bias), which is reserved for Boot ROM, SRAM and WOPCM.
- * Currently, in order to exclude [0, GuC ggtt_pin_bias) address space from
- * GGTT, all gfx objects used by GuC are allocated with intel_guc_allocate_vma()
- * and pinned with PIN_OFFSET_BIAS along with the value of GuC ggtt_pin_bias.
- *
- * Return: GGTT offset of the @vma.
- */
-static inline u32 intel_guc_ggtt_offset(struct intel_guc *guc,
- struct i915_vma *vma)
-{
- u32 offset = i915_ggtt_offset(vma);
-
- GEM_BUG_ON(offset < guc->ggtt_pin_bias);
- GEM_BUG_ON(range_overflows_t(u64, offset, vma->size, GUC_GGTT_TOP));
-
- return offset;
-}
+u32 intel_guc_ggtt_offset(struct intel_guc *guc, struct i915_vma *vma);
void intel_guc_init_early(struct intel_guc *guc);
void intel_guc_init_send_regs(struct intel_guc *guc);
diff --git a/drivers/gpu/drm/i915/intel_huc.c b/drivers/gpu/drm/i915/intel_huc.c
index ffcad5fad6a7..37ef540dd280 100644
--- a/drivers/gpu/drm/i915/intel_huc.c
+++ b/drivers/gpu/drm/i915/intel_huc.c
@@ -63,7 +63,7 @@ int intel_huc_auth(struct intel_huc *huc)
return -ENOEXEC;
vma = i915_gem_object_ggtt_pin(huc->fw.obj, NULL, 0, 0,
- PIN_OFFSET_BIAS | guc->ggtt_pin_bias);
+ PIN_OFFSET_BIAS | i915->ggtt.pin_bias);
if (IS_ERR(vma)) {
ret = PTR_ERR(vma);
DRM_ERROR("HuC: Failed to pin huc fw object %d\n", ret);
diff --git a/drivers/gpu/drm/i915/intel_uc_fw.c b/drivers/gpu/drm/i915/intel_uc_fw.c
index 6e8e0b546743..fd496416087c 100644
--- a/drivers/gpu/drm/i915/intel_uc_fw.c
+++ b/drivers/gpu/drm/i915/intel_uc_fw.c
@@ -222,7 +222,7 @@ int intel_uc_fw_upload(struct intel_uc_fw *uc_fw,
goto fail;
}
- ggtt_pin_bias = to_i915(uc_fw->obj->base.dev)->guc.ggtt_pin_bias;
+ ggtt_pin_bias = to_i915(uc_fw->obj->base.dev)->ggtt.pin_bias;
vma = i915_gem_object_ggtt_pin(uc_fw->obj, NULL, 0, 0,
PIN_OFFSET_BIAS | ggtt_pin_bias);
if (IS_ERR(vma)) {
diff --git a/drivers/gpu/drm/i915/intel_wopcm.c b/drivers/gpu/drm/i915/intel_wopcm.c
index 02f602db9548..74bf76f3fddc 100644
--- a/drivers/gpu/drm/i915/intel_wopcm.c
+++ b/drivers/gpu/drm/i915/intel_wopcm.c
@@ -140,23 +140,6 @@ static inline int check_hw_restriction(struct drm_i915_private *i915,
return err;
}
-/**
- * wopcm_init_guc_ggtt_pin_bias() - Initialize the GuC ggtt_pin_bias value.
- * @wopcm: pointer to intel_wopcm.
- *
- * This function will calculate and initialize the GuC ggtt_pin_bias value based
- * on overall WOPCM size and GuC WOPCM size.
- */
-static void wopcm_init_guc_ggtt_pin_bias(struct intel_wopcm *wopcm)
-{
- struct drm_i915_private *i915 = wopcm_to_i915(wopcm);
-
- GEM_BUG_ON(!wopcm->size);
- GEM_BUG_ON(wopcm->size < wopcm->guc.base);
-
- i915->guc.ggtt_pin_bias = wopcm->size - wopcm->guc.base;
-}
-
/**
* intel_wopcm_init() - Initialize the WOPCM structure.
* @wopcm: pointer to intel_wopcm.
@@ -224,8 +207,6 @@ int intel_wopcm_init(struct intel_wopcm *wopcm)
wopcm->guc.base = guc_wopcm_base;
wopcm->guc.size = guc_wopcm_size;
- wopcm_init_guc_ggtt_pin_bias(wopcm);
-
return 0;
}
diff --git a/drivers/gpu/drm/i915/intel_wopcm.h b/drivers/gpu/drm/i915/intel_wopcm.h
index 6298910a384c..c4bb2603c788 100644
--- a/drivers/gpu/drm/i915/intel_wopcm.h
+++ b/drivers/gpu/drm/i915/intel_wopcm.h
@@ -7,6 +7,7 @@
#ifndef _INTEL_WOPCM_H_
#define _INTEL_WOPCM_H_
+#include "i915_gem.h"
#include <linux/types.h>
/**
@@ -24,6 +25,13 @@ struct intel_wopcm {
} guc;
};
+static inline u32 intel_wopcm_get_pin_bias(struct intel_wopcm *wopcm)
+{
+ GEM_BUG_ON(!wopcm->size);
+ GEM_BUG_ON(wopcm->size < wopcm->guc.base);
+ return wopcm->size - wopcm->guc.base;
+}
+
void intel_wopcm_init_early(struct intel_wopcm *wopcm);
int intel_wopcm_init(struct intel_wopcm *wopcm);
int intel_wopcm_init_hw(struct intel_wopcm *wopcm);
diff --git a/drivers/gpu/drm/i915/selftests/mock_gtt.c b/drivers/gpu/drm/i915/selftests/mock_gtt.c
index a140ea5c3a7c..9f059b74b525 100644
--- a/drivers/gpu/drm/i915/selftests/mock_gtt.c
+++ b/drivers/gpu/drm/i915/selftests/mock_gtt.c
@@ -117,6 +117,8 @@ void mock_init_ggtt(struct drm_i915_private *i915)
ggtt->vm.vma_ops.set_pages = ggtt_set_pages;
ggtt->vm.vma_ops.clear_pages = clear_pages;
+ ggtt->pin_bias = 0;
+
i915_address_space_init(&ggtt->vm, i915);
}
--
2.17.1
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