drivers/gpu/drm/nouveau/nouveau_svm.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/nouveau/nouveau_svm.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/nouveau/nouveau_svm.c
Extension
.c
Size
28731 bytes
Lines
1088
Domain
Driver Families
Bucket
drivers/gpu
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

struct nouveau_svm {
	struct nouveau_drm *drm;
	struct mutex mutex;
	struct list_head inst;

	struct nouveau_svm_fault_buffer {
		int id;
		struct nvif_object object;
		u32 entries;
		u32 getaddr;
		u32 putaddr;
		u32 get;
		u32 put;
		struct nvif_event notify;
		struct work_struct work;

		struct nouveau_svm_fault {
			u64 inst;
			u64 addr;
			u64 time;
			u32 engine;
			u8  gpc;
			u8  hub;
			u8  access;
			u8  client;
			u8  fault;
			struct nouveau_svmm *svmm;
		} **fault;
		int fault_nr;
	} buffer[];
};

#define FAULT_ACCESS_READ 0
#define FAULT_ACCESS_WRITE 1
#define FAULT_ACCESS_ATOMIC 2
#define FAULT_ACCESS_PREFETCH 3

#define SVM_DBG(s,f,a...) NV_DEBUG((s)->drm, "svm: "f"\n", ##a)
#define SVM_ERR(s,f,a...) NV_WARN((s)->drm, "svm: "f"\n", ##a)

struct nouveau_pfnmap_args {
	struct nvif_ioctl_v0_hdr i;
	struct nvif_ioctl_mthd_v0_hdr m;
	struct nvif_vmm_pfnmap_v0 p;
};

struct nouveau_ivmm {
	struct nouveau_svmm *svmm;
	u64 inst;
	struct list_head head;
};

static struct nouveau_ivmm *
nouveau_ivmm_find(struct nouveau_svm *svm, u64 inst)
{
	struct nouveau_ivmm *ivmm;
	list_for_each_entry(ivmm, &svm->inst, head) {
		if (ivmm->inst == inst)
			return ivmm;
	}
	return NULL;
}

#define SVMM_DBG(s,f,a...)                                                     \
	NV_DEBUG((s)->vmm->cli->drm, "svm-%p: "f"\n", (s), ##a)
#define SVMM_ERR(s,f,a...)                                                     \
	NV_WARN((s)->vmm->cli->drm, "svm-%p: "f"\n", (s), ##a)

int
nouveau_svmm_bind(struct drm_device *dev, void *data,
		  struct drm_file *file_priv)
{
	struct nouveau_cli *cli = nouveau_cli(file_priv);
	struct drm_nouveau_svm_bind *args = data;
	unsigned target, cmd;
	unsigned long addr, end;
	struct mm_struct *mm;

	args->va_start &= PAGE_MASK;
	args->va_end = ALIGN(args->va_end, PAGE_SIZE);

	/* Sanity check arguments */
	if (args->reserved0 || args->reserved1)
		return -EINVAL;
	if (args->header & (~NOUVEAU_SVM_BIND_VALID_MASK))
		return -EINVAL;
	if (args->va_start >= args->va_end)
		return -EINVAL;

	cmd = args->header >> NOUVEAU_SVM_BIND_COMMAND_SHIFT;

Annotation

Implementation Notes