drivers/gpu/drm/nouveau/nvkm/subdev/fb/r535.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/nouveau/nvkm/subdev/fb/r535.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/nouveau/nvkm/subdev/fb/r535.c
Extension
.c
Size
2445 bytes
Lines
88
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

#include "priv.h"
#include "ram.h"

#include <subdev/gsp.h>

static const struct nvkm_ram_func
r535_fb_ram = {
};

static int
r535_fb_ram_new(struct nvkm_fb *fb, struct nvkm_ram **pram)
{
	struct nvkm_gsp *gsp = fb->subdev.device->gsp;
	struct nvkm_ram *ram;
	int ret;

	if (!(ram = *pram = kzalloc_obj(*ram)))
		return -ENOMEM;

	ram->func = &r535_fb_ram;
	ram->fb = fb;
	ram->type = NVKM_RAM_TYPE_UNKNOWN; /*TODO: pull this from GSP. */
	ram->size = gsp->fb.size;
	ram->stolen = false;
	mutex_init(&ram->mutex);

	for (int i = 0; i < gsp->fb.region_nr; i++) {
		ret = nvkm_mm_init(&ram->vram, NVKM_RAM_MM_NORMAL,
				   gsp->fb.region[i].addr >> NVKM_RAM_MM_SHIFT,
				   gsp->fb.region[i].size >> NVKM_RAM_MM_SHIFT,
				   1);
		if (ret)
			return ret;
	}

	return 0;
}

static void *
r535_fb_dtor(struct nvkm_fb *fb)
{
	kfree(fb->func);
	return fb;
}

int
r535_fb_new(const struct nvkm_fb_func *hw,
	    struct nvkm_device *device, enum nvkm_subdev_type type, int inst, struct nvkm_fb **pfb)
{
	struct nvkm_fb_func *rm;
	int ret;

	if (!(rm = kzalloc_obj(*rm)))
		return -ENOMEM;

	rm->dtor = r535_fb_dtor;
	rm->sysmem.flush_page_init = hw->sysmem.flush_page_init;
	rm->vidmem.size = hw->vidmem.size;
	rm->ram_new = r535_fb_ram_new;

	ret = nvkm_fb_new_(rm, device, type, inst, pfb);
	if (ret)
		kfree(rm);

	return ret;
}

Annotation

Implementation Notes