drivers/gpu/drm/nouveau/nvkm/subdev/privring/gk20a.c
Source file repositories/reference/linux-study-clean/drivers/gpu/drm/nouveau/nvkm/subdev/privring/gk20a.c
File Facts
- System
- Linux kernel
- Corpus path
drivers/gpu/drm/nouveau/nvkm/subdev/privring/gk20a.c- Extension
.c- Size
- 2664 bytes
- Lines
- 86
- 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.
- 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.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
subdev/privring.hsubdev/timer.h
Detected Declarations
function Copyrightfunction gk20a_privring_intrfunction gk20a_privring_initfunction gk20a_privring_new
Annotated Snippet
#include <subdev/privring.h>
#include <subdev/timer.h>
static void
gk20a_privring_init_privring_ring(struct nvkm_subdev *privring)
{
struct nvkm_device *device = privring->device;
nvkm_mask(device, 0x137250, 0x3f, 0);
nvkm_mask(device, 0x000200, 0x20, 0);
udelay(20);
nvkm_mask(device, 0x000200, 0x20, 0x20);
nvkm_wr32(device, 0x12004c, 0x4);
nvkm_wr32(device, 0x122204, 0x2);
nvkm_rd32(device, 0x122204);
/*
* Bug: increase clock timeout to avoid operation failure at high
* gpcclk rate.
*/
nvkm_wr32(device, 0x122354, 0x800);
nvkm_wr32(device, 0x128328, 0x800);
nvkm_wr32(device, 0x124320, 0x800);
}
static void
gk20a_privring_intr(struct nvkm_subdev *privring)
{
struct nvkm_device *device = privring->device;
u32 status0 = nvkm_rd32(device, 0x120058);
if (status0 & 0x7) {
nvkm_debug(privring, "resetting privring ring\n");
gk20a_privring_init_privring_ring(privring);
}
/* Acknowledge interrupt */
nvkm_mask(device, 0x12004c, 0x2, 0x2);
nvkm_msec(device, 2000,
if (!(nvkm_rd32(device, 0x12004c) & 0x0000003f))
break;
);
}
static int
gk20a_privring_init(struct nvkm_subdev *privring)
{
gk20a_privring_init_privring_ring(privring);
return 0;
}
static const struct nvkm_subdev_func
gk20a_privring = {
.init = gk20a_privring_init,
.intr = gk20a_privring_intr,
};
int
gk20a_privring_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
struct nvkm_subdev **pprivring)
{
return nvkm_subdev_new_(&gk20a_privring, device, type, inst, pprivring);
}
Annotation
- Immediate include surface: `subdev/privring.h`, `subdev/timer.h`.
- Detected declarations: `function Copyright`, `function gk20a_privring_intr`, `function gk20a_privring_init`, `function gk20a_privring_new`.
- Atlas domain: Driver Families / drivers/gpu.
- Implementation status: source implementation candidate.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.