struct nvkm_vma;
struct nvkm_vm;
+struct nvkm_tags {
+ struct nvkm_mm_node *mn;
+ refcount_t refcount;
+};
+
enum nvkm_memory_target {
NVKM_MEM_TARGET_INST, /* instance memory */
NVKM_MEM_TARGET_VRAM, /* video memory */
struct nvkm_memory {
const struct nvkm_memory_func *func;
const struct nvkm_memory_ptrs *ptrs;
+ struct nvkm_tags *tags;
};
struct nvkm_memory_func {
int nvkm_memory_new(struct nvkm_device *, enum nvkm_memory_target,
u64 size, u32 align, bool zero, struct nvkm_memory **);
void nvkm_memory_del(struct nvkm_memory **);
+int nvkm_memory_tags_get(struct nvkm_memory *, struct nvkm_device *, u32 tags,
+ void (*clear)(struct nvkm_device *, u32, u32),
+ struct nvkm_tags **);
+void nvkm_memory_tags_put(struct nvkm_memory *, struct nvkm_device *,
+ struct nvkm_tags **);
+
#define nvkm_memory_target(p) (p)->func->target(p)
#define nvkm_memory_addr(p) (p)->func->addr(p)
#define nvkm_memory_size(p) (p)->func->size(p)
* Authors: Ben Skeggs <bskeggs@redhat.com>
*/
#include <core/memory.h>
+#include <core/mm.h>
+#include <subdev/fb.h>
#include <subdev/instmem.h>
void
+nvkm_memory_tags_put(struct nvkm_memory *memory, struct nvkm_device *device,
+ struct nvkm_tags **ptags)
+{
+ struct nvkm_fb *fb = device->fb;
+ struct nvkm_tags *tags = *ptags;
+ if (tags) {
+ mutex_lock(&fb->subdev.mutex);
+ if (refcount_dec_and_test(&tags->refcount)) {
+ nvkm_mm_free(&fb->tags, &tags->mn);
+ kfree(memory->tags);
+ memory->tags = NULL;
+ }
+ mutex_unlock(&fb->subdev.mutex);
+ *ptags = NULL;
+ }
+}
+
+int
+nvkm_memory_tags_get(struct nvkm_memory *memory, struct nvkm_device *device,
+ u32 nr, void (*clr)(struct nvkm_device *, u32, u32),
+ struct nvkm_tags **ptags)
+{
+ struct nvkm_fb *fb = device->fb;
+ struct nvkm_tags *tags;
+
+ mutex_lock(&fb->subdev.mutex);
+ if ((tags = memory->tags)) {
+ /* If comptags exist for the memory, but a different amount
+ * than requested, the buffer is being mapped with settings
+ * that are incompatible with existing mappings.
+ */
+ if (tags->mn && tags->mn->length != nr) {
+ mutex_unlock(&fb->subdev.mutex);
+ return -EINVAL;
+ }
+
+ refcount_inc(&tags->refcount);
+ *ptags = tags;
+ return 0;
+ }
+
+ if (!(tags = kmalloc(sizeof(*tags), GFP_KERNEL))) {
+ mutex_unlock(&fb->subdev.mutex);
+ return -ENOMEM;
+ }
+
+ if (!nvkm_mm_head(&fb->tags, 0, 1, nr, nr, 1, &tags->mn)) {
+ if (clr)
+ clr(device, tags->mn->offset, tags->mn->length);
+ } else {
+ /* Failure to allocate HW comptags is not an error, the
+ * caller should fall back to an uncompressed map.
+ *
+ * As memory can be mapped in multiple places, we still
+ * need to track the allocation failure and ensure that
+ * any additional mappings remain uncompressed.
+ *
+ * This is handled by returning an empty nvkm_tags.
+ */
+ tags->mn = NULL;
+ }
+
+ refcount_set(&tags->refcount, 1);
+ mutex_unlock(&fb->subdev.mutex);
+ *ptags = tags;
+ return 0;
+}
+
+void
nvkm_memory_ctor(const struct nvkm_memory_func *func,
struct nvkm_memory *memory)
{