[PATCH 3/9] drm/amdgpu: Use dynamical reserved vm size

Rex Zhu
2018-12-06T11:32:31Z

Use dynamical reserved vm size instand of hardcode.

driver always reserve AMDGPU_VA_RESERVED_SIZE at the
bottom of VM space.

for gfx/sdma mcbp feature,
reserve AMDGPU_VA_RESERVED_SIZ * AMDGPU_VM_MAX_NUM_CTX
at the top of VM space.
For sriov, only need to reserve AMDGPU_VA_RESERVED_SIZE
at the top.

Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_csa.c | 8 ++++++++
drivers/gpu/drm/amd/amdgpu/amdgpu_csa.h | 1 +
drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | 10 ++++++++++
drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c | 3 +--
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 1 +
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h | 1 +
drivers/gpu/drm/amd/amdgpu/gmc_v6_0.c | 2 +-
drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c | 2 +-
drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c | 2 +-
9 files changed, 25 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_csa.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_csa.c
index 44b046f..caa71c7 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_csa.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_csa.c
@@ -24,6 +24,14 @@

#include "amdgpu.h"

+uint64_t amdgpu_get_reserved_csa_size(struct amdgpu_device *adev)
+{
+ if (amdgpu_sriov_vf(adev))
+ return AMDGPU_VA_RESERVED_SIZE;
+ else
+ return AMDGPU_VA_RESERVED_SIZE * AMDGPU_VM_MAX_NUM_CTX;
+}
+
uint64_t amdgpu_csa_vaddr(struct amdgpu_device *adev, uint32_t id)
{
uint64_t addr = adev->vm_manager.max_pfn << AMDGPU_GPU_PAGE_SHIFT;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_csa.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_csa.h
index aaf1fba..7159d6d 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_csa.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_csa.h
@@ -27,6 +27,7 @@

#define AMDGPU_CSA_SIZE (128 * 1024)

+uint64_t amdgpu_get_reserved_csa_size(struct amdgpu_device *adev);
uint32_t amdgpu_get_total_csa_size(struct amdgpu_device *adev);
uint64_t amdgpu_csa_vaddr(struct amdgpu_device *adev, uint32_t id);
int amdgpu_allocate_static_csa(struct amdgpu_device *adev, struct amdgpu_bo **bo,
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
index 7b3d1eb..4c12de8 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
@@ -557,6 +557,7 @@ int amdgpu_gem_va_ioctl(struct drm_device *dev, void *data,
struct ww_acquire_ctx ticket;
struct list_head list, duplicates;
uint64_t va_flags;
+ uint64_t va_reserved, va_top;
int r = 0;

if (args->va_address < AMDGPU_VA_RESERVED_SIZE) {
@@ -565,6 +566,15 @@ int amdgpu_gem_va_ioctl(struct drm_device *dev, void *data,
args->va_address, AMDGPU_VA_RESERVED_SIZE);
return -EINVAL;
}
+ va_top = adev->vm_manager.max_pfn * AMDGPU_GPU_PAGE_SIZE;
+ va_reserved = va_top - adev->vm_manager.reserved_vm_size;
+
+ if (args->va_address > va_reserved && args->va_address < va_top) {
+ dev_dbg(&dev->pdev->dev,
+ "va_address 0x%LX is in reserved area 0x%LX\n",
+ args->va_address, adev->vm_manager.reserved_vm_size);
+ return -EINVAL;
+ }

if (args->va_address >= AMDGPU_GMC_HOLE_START &&
args->va_address < AMDGPU_GMC_HOLE_END) {
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
index f736bda..52e4e90 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
@@ -702,7 +702,7 @@ static int amdgpu_info_ioctl(struct drm_device *dev, void *data, struct drm_file
dev_info.ids_flags |= AMDGPU_IDS_FLAGS_PREEMPTION;

vm_size = adev->vm_manager.max_pfn * AMDGPU_GPU_PAGE_SIZE;
- vm_size -= AMDGPU_VA_RESERVED_SIZE;
+ vm_size -= adev->vm_manager.reserved_vm_size;

/* Older VCE FW versions are buggy and can handle only 40bits */
if (adev->vce.fw_version &&
@@ -977,7 +977,6 @@ int amdgpu_driver_open_kms(struct drm_device *dev, struct drm_file *file_priv)
goto error_vm;
}

-
if (amdgpu_sriov_vf(adev)) {
uint64_t csa_addr = amdgpu_csa_vaddr(adev, 1) & AMDGPU_GMC_HOLE_MASK;
r = amdgpu_map_static_csa(adev, &fpriv->vm, adev->virt.csa_obj,
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index 352b304..2f2b9f4 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -2901,6 +2901,7 @@ void amdgpu_vm_adjust_size(struct amdgpu_device *adev, uint32_t min_vm_size,
}

adev->vm_manager.max_pfn = (uint64_t)vm_size << 18;
+ adev->vm_manager.reserved_vm_size = amdgpu_get_reserved_csa_size(adev);

tmp = roundup_pow_of_two(adev->vm_manager.max_pfn);
if (amdgpu_vm_block_size != -1)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
index 2a8898d..ec650ac 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
@@ -260,6 +260,7 @@ struct amdgpu_vm_manager {
unsigned seqno[AMDGPU_MAX_RINGS];

uint64_t max_pfn;
+ uint64_t reserved_vm_size;
uint32_t num_level;
uint32_t block_size;
uint32_t fragment_size;
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v6_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v6_0.c
index 2821d1d..3351b56 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v6_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v6_0.c
@@ -471,7 +471,7 @@ static void gmc_v6_0_set_prt(struct amdgpu_device *adev, bool enable)
if (enable) {
uint32_t low = AMDGPU_VA_RESERVED_SIZE >> AMDGPU_GPU_PAGE_SHIFT;
uint32_t high = adev->vm_manager.max_pfn -
- (AMDGPU_VA_RESERVED_SIZE >> AMDGPU_GPU_PAGE_SHIFT);
+ (adev->vm_manager.reserved_vm_size >> AMDGPU_GPU_PAGE_SHIFT);

WREG32(mmVM_PRT_APERTURE0_LOW_ADDR, low);
WREG32(mmVM_PRT_APERTURE1_LOW_ADDR, low);
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c
index 761dcfb..92bd175 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c
@@ -568,7 +568,7 @@ static void gmc_v7_0_set_prt(struct amdgpu_device *adev, bool enable)
if (enable) {
uint32_t low = AMDGPU_VA_RESERVED_SIZE >> AMDGPU_GPU_PAGE_SHIFT;
uint32_t high = adev->vm_manager.max_pfn -
- (AMDGPU_VA_RESERVED_SIZE >> AMDGPU_GPU_PAGE_SHIFT);
+ (adev->vm_manager.reserved_vm_size >> AMDGPU_GPU_PAGE_SHIFT);

WREG32(mmVM_PRT_APERTURE0_LOW_ADDR, low);
WREG32(mmVM_PRT_APERTURE1_LOW_ADDR, low);
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c
index 531aaf3..d909ddf 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c
@@ -772,7 +772,7 @@ static void gmc_v8_0_set_prt(struct amdgpu_device *adev, bool enable)
if (enable) {
uint32_t low = AMDGPU_VA_RESERVED_SIZE >> AMDGPU_GPU_PAGE_SHIFT;
uint32_t high = adev->vm_manager.max_pfn -
- (AMDGPU_VA_RESERVED_SIZE >> AMDGPU_GPU_PAGE_SHIFT);
+ (adev->vm_manager.reserved_vm_size >> AMDGPU_GPU_PAGE_SHIFT);

WREG32(mmVM_PRT_APERTURE0_LOW_ADDR, low);
WREG32(mmVM_PRT_APERTURE1_LOW_ADDR, low);