This patch extends g2v notification to notify host GVT-g of
ppgtt update from guest, including alloc_4lvl, clear_4lv4 and
insert_4lvl. It uses shared page to pass the additional params.
This patch also add one new pvmmio level to control ppgtt update.
Use PVMMIO_PPGTT_UPDATE to control this level of pvmmio optimization.
v0: RFC
v1: rebase
v2: added pv callbacks for vm.{allocate_va_range, insert_entries,
clear_range} within ppgtt.
Cc: Zhenyu Wang <zhenyuw@xxxxxxxxxxxxxxx>
Cc: Zhi Wang <zhi.a.wang@xxxxxxxxx>
Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
Cc: He, Min <min.he@xxxxxxxxx>
Cc: Jiang, Fei <fei.jiang@xxxxxxxxx>
Cc: Gong, Zhipeng <zhipeng.gong@xxxxxxxxx>
Cc: Yuan, Hang <hang.yuan@xxxxxxxxx>
Cc: Zhiyuan Lv <zhiyuan.lv@xxxxxxxxx>
Signed-off-by: Xiaolin Zhang <xiaolin.zhang@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_gem_gtt.c | 67 +++++++++++++++++++++++++++++++++++++
drivers/gpu/drm/i915/i915_pvinfo.h | 3 ++
drivers/gpu/drm/i915/i915_vgpu.c | 3 +-
3 files changed, 72 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 98d9a1e..b529f53 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -956,6 +956,25 @@ static void gen8_ppgtt_clear_4lvl(struct i915_address_space *vm,
}
}
+static void gen8_ppgtt_clear_4lvl_pv(struct i915_address_space *vm,
+ u64 start, u64 length)
+{
+ struct i915_hw_ppgtt *ppgtt = i915_vm_to_ppgtt(vm);
+ struct i915_pml4 *pml4 = &ppgtt->pml4;
+ struct drm_i915_private *dev_priv = vm->i915;
+ struct pv_ppgtt_update *pv_ppgtt =
+ &dev_priv->vgpu.shared_page->pv_ppgtt;
+ u64 orig_start = start;
+ u64 orig_length = length;
+
+ gen8_ppgtt_clear_4lvl(vm, start, length);
+
+ pv_ppgtt->pdp = px_dma(pml4);
+ pv_ppgtt->start = orig_start;
+ pv_ppgtt->length = orig_length;
+ I915_WRITE(vgtif_reg(g2v_notify), VGT_G2V_PPGTT_L4_CLEAR);
+}
+
static inline struct sgt_dma {
struct scatterlist *sg;
dma_addr_t dma, max;
@@ -1197,6 +1216,25 @@ static void gen8_ppgtt_insert_4lvl(struct i915_address_space *vm,
}
}
+static void gen8_ppgtt_insert_4lvl_pv(struct i915_address_space *vm,
+ struct i915_vma *vma,
+ enum i915_cache_level cache_level,
+ u32 flags)
+{
+ struct i915_hw_ppgtt *ppgtt = i915_vm_to_ppgtt(vm);
+ struct drm_i915_private *dev_priv = vm->i915;
+ struct pv_ppgtt_update *pv_ppgtt =
+ &dev_priv->vgpu.shared_page->pv_ppgtt;
+
+ gen8_ppgtt_insert_4lvl(vm, vma, cache_level, flags);
+
+ pv_ppgtt->pdp = px_dma(&ppgtt->pml4);
+ pv_ppgtt->start = vma->node.start;
+ pv_ppgtt->length = vma->node.size;
+ pv_ppgtt->cache_level = cache_level;
+ I915_WRITE(vgtif_reg(g2v_notify), VGT_G2V_PPGTT_L4_INSERT);
+}
+
static void gen8_free_page_tables(struct i915_address_space *vm,
struct i915_page_directory *pd)
{
@@ -1466,6 +1504,30 @@ static int gen8_ppgtt_alloc_4lvl(struct i915_address_space *vm,
return -ENOMEM;
}
+static int gen8_ppgtt_alloc_4lvl_pv(struct i915_address_space *vm,
+ u64 start, u64 length)
+{
+ struct i915_hw_ppgtt *ppgtt = i915_vm_to_ppgtt(vm);
+ struct i915_pml4 *pml4 = &ppgtt->pml4;
+ struct drm_i915_private *dev_priv = vm->i915;
+ struct pv_ppgtt_update *pv_ppgtt =
+ &dev_priv->vgpu.shared_page->pv_ppgtt;
+ int ret;
+ u64 orig_start = start;
+ u64 orig_length = length;
+
+ ret = gen8_ppgtt_alloc_4lvl(vm, start, length);
+ if (ret)
+ return ret;
+
+ pv_ppgtt->pdp = px_dma(pml4);
+ pv_ppgtt->start = orig_start;
+ pv_ppgtt->length = orig_length;
+ I915_WRITE(vgtif_reg(g2v_notify), VGT_G2V_PPGTT_L4_ALLOC);
+
+ return 0;
+}
+
static void gen8_dump_pdp(struct i915_hw_ppgtt *ppgtt,
struct i915_page_directory_pointer *pdp,
u64 start, u64 length,
@@ -1631,6 +1693,11 @@ static struct i915_hw_ppgtt *gen8_ppgtt_create(struct drm_i915_private *i915)
ppgtt->vm.allocate_va_range = gen8_ppgtt_alloc_4lvl;
ppgtt->vm.insert_entries = gen8_ppgtt_insert_4lvl;
ppgtt->vm.clear_range = gen8_ppgtt_clear_4lvl;
+ if (PVMMIO_LEVEL_ENABLE(i915, PVMMIO_PPGTT_UPDATE)) {
+ ppgtt->vm.allocate_va_range = gen8_ppgtt_alloc_4lvl_pv;
+ ppgtt->vm.insert_entries = gen8_ppgtt_insert_4lvl_pv;
+ ppgtt->vm.clear_range = gen8_ppgtt_clear_4lvl_pv;
+ }
} else {
err = __pdp_init(&ppgtt->vm, &ppgtt->pdp);
if (err)
diff --git a/drivers/gpu/drm/i915/i915_pvinfo.h b/drivers/gpu/drm/i915/i915_pvinfo.h
index 1e24c45..790db50 100644
--- a/drivers/gpu/drm/i915/i915_pvinfo.h
+++ b/drivers/gpu/drm/i915/i915_pvinfo.h
@@ -46,6 +46,9 @@ enum vgt_g2v_type {
VGT_G2V_PPGTT_L4_PAGE_TABLE_DESTROY,
VGT_G2V_EXECLIST_CONTEXT_CREATE,
VGT_G2V_EXECLIST_CONTEXT_DESTROY,
+ VGT_G2V_PPGTT_L4_ALLOC,
+ VGT_G2V_PPGTT_L4_CLEAR,
+ VGT_G2V_PPGTT_L4_INSERT,
VGT_G2V_MAX,
};
diff --git a/drivers/gpu/drm/i915/i915_vgpu.c b/drivers/gpu/drm/i915/i915_vgpu.c
index 013d329..e11dcd8 100644
--- a/drivers/gpu/drm/i915/i915_vgpu.c
+++ b/drivers/gpu/drm/i915/i915_vgpu.c
@@ -66,7 +66,8 @@ void i915_check_vgpu(struct drm_i915_private *dev_priv)
BUILD_BUG_ON(sizeof(struct vgt_if) != VGT_PVINFO_SIZE);
- dev_priv->vgpu.pv_caps = PVMMIO_ELSP_SUBMIT | PVMMIO_MASTER_IRQ;
+ dev_priv->vgpu.pv_caps = PVMMIO_ELSP_SUBMIT
+ | PVMMIO_MASTER_IRQ | PVMMIO_PPGTT_UPDATE;
magic = __raw_i915_read64(dev_priv, vgtif_reg(magic));
if (magic != VGT_MAGIC)
--
2.7.4
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