26 Apr
2022
26 Apr
'22
12:38 p.m.
On Tue, Apr 26, 2022 at 2:24 PM Cai Huoqing cai.huoqing@linux.dev wrote:
On 26 4月 22 12:50:50, Arnd Bergmann wrote:
+#define DRM_NVDLA_SUBMIT 0x00 +#define DRM_NVDLA_GEM_CREATE 0x01 +#define DRM_NVDLA_GEM_MMAP 0x02
Is this an actual mmap() call, or something that needs to be done before the mmap()? Is the 'handle' a file descriptor or some internal number?
It's an gem object mmap which calls drm_gem_dumb_map_offset() inside and the handle is gem object handle.
Ok, thanks for the clarification. I see that other drivers have the exact same thing, so I assume it's fine for drivers/gpu/ then, even if it would be a bit odd for other subsystems.
Arnd