The AMDGPU_VA_RANGE_32_BIT flag is added to request VA range in the
32bit address space for amdgpu_va_range_alloc.
The 32bit address space is reserved at initialization time, and managed
with a separate VAMGR as part of the global VAMGR. And if no enough VA
space available in range above 4GB, this reserved range can be used as
fallback.
v2: add comment for AMDGPU_VA_RANGE_32_BIT, and add vamgr to va_range
Signed-off-by: Jammy Zhou <Jammy.Zhou@xxxxxxx>
Reviewed-by: Christian König <christian.koenig@xxxxxxx>
---
amdgpu/amdgpu.h | 5 +++++
amdgpu/amdgpu_device.c | 22 ++++++++++++++++++++++
amdgpu/amdgpu_internal.h | 9 +++++++++
amdgpu/amdgpu_vamgr.c | 35 ++++++++++++++++++++++++++++-------
4 files changed, 64 insertions(+), 7 deletions(-)
diff --git a/amdgpu/amdgpu.h b/amdgpu/amdgpu.h
index a90c1ac..1e633e3 100644
--- a/amdgpu/amdgpu.h
+++ b/amdgpu/amdgpu.h
@@ -1075,6 +1075,11 @@ int amdgpu_read_mm_registers(amdgpu_device_handle dev, unsigned dword_offset,
uint32_t *values);
/**
+ * Flag to request VA address range in the 32bit address space
+*/
+#define AMDGPU_VA_RANGE_32_BIT 0x1
+
+/**
* Allocate virtual address range
*
* \param dev - [in] Device handle. See #amdgpu_device_initialize()
diff --git a/amdgpu/amdgpu_device.c b/amdgpu/amdgpu_device.c
index ba75db0..067ef64 100644
--- a/amdgpu/amdgpu_device.c
+++ b/amdgpu/amdgpu_device.c
@@ -40,6 +40,7 @@
#include "amdgpu_drm.h"
#include "amdgpu_internal.h"
#include "util_hash_table.h"
+#include "util_math.h"
#define PTR_TO_UINT(x) ((unsigned)((intptr_t)(x)))
#define UINT_TO_PTR(x) ((void *)((intptr_t)(x)))
@@ -126,6 +127,7 @@ int amdgpu_device_initialize(int fd,
int flag_auth = 0;
int flag_authexist=0;
uint32_t accel_working = 0;
+ uint64_t start, max;
*device_handle = NULL;
@@ -204,6 +206,19 @@ int amdgpu_device_initialize(int fd,
dev->vamgr = amdgpu_vamgr_get_global(dev);
+ max = MIN2(dev->dev_info.virtual_address_max, 0xffffffff);
+ start = amdgpu_vamgr_find_va(dev->vamgr,
+ max - dev->dev_info.virtual_address_offset,
+ dev->dev_info.virtual_address_alignment, 0);
+ if (start > 0xffffffff)
+ goto free_va; /* shouldn't get here */
+
+ dev->vamgr_32 = calloc(1, sizeof(struct amdgpu_bo_va_mgr));
+ if (dev->vamgr_32 == NULL)
+ goto free_va;
+ amdgpu_vamgr_init(dev->vamgr_32, start, max,
+ dev->dev_info.virtual_address_alignment);
+
*major_version = dev->major_version;
*minor_version = dev->minor_version;
*device_handle = dev;
@@ -212,6 +227,11 @@ int amdgpu_device_initialize(int fd,
return 0;
+free_va:
+ r = -ENOMEM;
+ amdgpu_vamgr_free_va(dev->vamgr, start,
+ max - dev->dev_info.virtual_address_offset);
+
cleanup:
if (dev->fd >= 0)
close(dev->fd);
@@ -222,6 +242,8 @@ cleanup:
void amdgpu_device_free_internal(amdgpu_device_handle dev)
{
+ amdgpu_vamgr_deinit(dev->vamgr_32);
+ free(dev->vamgr_32);
amdgpu_vamgr_reference(&dev->vamgr, NULL);
util_hash_table_destroy(dev->bo_flink_names);
util_hash_table_destroy(dev->bo_handles);
diff --git a/amdgpu/amdgpu_internal.h b/amdgpu/amdgpu_internal.h
index 526a93f..6e65642 100644
--- a/amdgpu/amdgpu_internal.h
+++ b/amdgpu/amdgpu_internal.h
@@ -63,6 +63,7 @@ struct amdgpu_va {
uint64_t address;
uint64_t size;
enum amdgpu_gpu_va_range range;
+ struct amdgpu_bo_va_mgr *vamgr;
};
struct amdgpu_device {
@@ -80,7 +81,10 @@ struct amdgpu_device {
pthread_mutex_t bo_table_mutex;
struct drm_amdgpu_info_device dev_info;
struct amdgpu_gpu_info info;
+ /** The global VA manager for the whole virtual address space */
struct amdgpu_bo_va_mgr *vamgr;
+ /** The VA manager for the 32bit address space */
+ struct amdgpu_bo_va_mgr *vamgr_32;
};
struct amdgpu_bo {
@@ -124,6 +128,11 @@ struct amdgpu_bo_va_mgr* amdgpu_vamgr_get_global(struct amdgpu_device *dev);
void amdgpu_vamgr_reference(struct amdgpu_bo_va_mgr **dst, struct amdgpu_bo_va_mgr *src);
+void amdgpu_vamgr_init(struct amdgpu_bo_va_mgr *mgr, uint64_t start,
+ uint64_t max, uint64_t alignment);
+
+void amdgpu_vamgr_deinit(struct amdgpu_bo_va_mgr *mgr);
+
uint64_t amdgpu_vamgr_find_va(struct amdgpu_bo_va_mgr *mgr, uint64_t size,
uint64_t alignment, uint64_t base_required);
diff --git a/amdgpu/amdgpu_vamgr.c b/amdgpu/amdgpu_vamgr.c
index e044dfa..04e09e2 100644
--- a/amdgpu/amdgpu_vamgr.c
+++ b/amdgpu/amdgpu_vamgr.c
@@ -42,7 +42,7 @@ int amdgpu_va_range_query(amdgpu_device_handle dev,
return -EINVAL;
}
-static void amdgpu_vamgr_init(struct amdgpu_bo_va_mgr *mgr, uint64_t start,
+void amdgpu_vamgr_init(struct amdgpu_bo_va_mgr *mgr, uint64_t start,
uint64_t max, uint64_t alignment)
{
mgr->va_offset = start;
@@ -53,7 +53,7 @@ static void amdgpu_vamgr_init(struct amdgpu_bo_va_mgr *mgr, uint64_t start,
pthread_mutex_init(&mgr->bo_va_mutex, NULL);
}
-static void amdgpu_vamgr_deinit(struct amdgpu_bo_va_mgr *mgr)
+void amdgpu_vamgr_deinit(struct amdgpu_bo_va_mgr *mgr)
{
struct amdgpu_bo_va_hole *hole;
LIST_FOR_EACH_ENTRY(hole, &mgr->va_holes, list) {
@@ -248,23 +248,40 @@ int amdgpu_va_range_alloc(amdgpu_device_handle dev,
amdgpu_va_handle *va_range_handle,
uint64_t flags)
{
- va_base_alignment = MAX2(va_base_alignment, dev->vamgr->va_alignment);
- size = ALIGN(size, vamgr.va_alignment);
+ struct amdgpu_bo_va_mgr *vamgr;
- *va_base_allocated = amdgpu_vamgr_find_va(dev->vamgr, size,
+ if (flags & AMDGPU_VA_RANGE_32_BIT)
+ vamgr = dev->vamgr_32;
+ else
+ vamgr = dev->vamgr;
+
+ va_base_alignment = MAX2(va_base_alignment, vamgr->va_alignment);
+ size = ALIGN(size, vamgr->va_alignment);
+
+ *va_base_allocated = amdgpu_vamgr_find_va(vamgr, size,
va_base_alignment, va_base_required);
+ if (!(flags & AMDGPU_VA_RANGE_32_BIT) &&
+ (*va_base_allocated == AMDGPU_INVALID_VA_ADDRESS)) {
+ /* fallback to 32bit address */
+ vamgr = dev->vamgr_32;
+ *va_base_allocated = amdgpu_vamgr_find_va(vamgr, size,
+ va_base_alignment, va_base_required);
+
+ }
+
if (*va_base_allocated != AMDGPU_INVALID_VA_ADDRESS) {
struct amdgpu_va* va;
va = calloc(1, sizeof(struct amdgpu_va));
if(!va){
- amdgpu_vamgr_free_va(dev->vamgr, *va_base_allocated, size);
+ amdgpu_vamgr_free_va(vamgr, *va_base_allocated, size);
return -ENOMEM;
}
va->dev = dev;
va->address = *va_base_allocated;
va->size = size;
va->range = va_range_type;
+ va->vamgr = vamgr;
*va_range_handle = va;
} else {
return -EINVAL;
@@ -275,9 +292,13 @@ int amdgpu_va_range_alloc(amdgpu_device_handle dev,
int amdgpu_va_range_free(amdgpu_va_handle va_range_handle)
{
+ struct amdgpu_bo_va_mgr *vamgr;
+
if(!va_range_handle || !va_range_handle->address)
return 0;
- amdgpu_vamgr_free_va(va_range_handle->dev->vamgr, va_range_handle->address,
+
+ amdgpu_vamgr_free_va(va_range_handle->vamgr,
+ va_range_handle->address,
va_range_handle->size);
free(va_range_handle);
return 0;
--
1.9.1
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