Hello Chunming Zhou,
The patch 57ff96cf471a: "drm/amdgpu: implement cgs gpu memory
callbacks" from Apr 24, 2015, leads to the following static checker
warning:
drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c:274 amdgpu_cgs_gmap_gpu_mem()
warn: should 'obj->placements[0]->fpfn << 12' be a 64 bit type?
drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c:275 amdgpu_cgs_gmap_gpu_mem()
warn: should 'obj->placements[0]->lpfn << 12' be a 64 bit type?
drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c
265 static int amdgpu_cgs_gmap_gpu_mem(void *cgs_device, cgs_handle_t handle,
266 uint64_t *mcaddr)
267 {
268 int r;
269 u64 min_offset, max_offset;
270 struct amdgpu_bo *obj = (struct amdgpu_bo *)handle;
271
272 WARN_ON_ONCE(obj->placement.num_placement > 1);
273
274 min_offset = obj->placements[0].fpfn << PAGE_SHIFT;
275 max_offset = obj->placements[0].lpfn << PAGE_SHIFT;
Both of these.
276
277 r = amdgpu_bo_reserve(obj, false);
278 if (unlikely(r != 0))
279 return r;
280 r = amdgpu_bo_pin_restricted(obj, AMDGPU_GEM_DOMAIN_GTT,
281 min_offset, max_offset, mcaddr);
282 amdgpu_bo_unreserve(obj);
283 return r;
284 }
There are actually a few of these warnings which were less clear
whether the warning was correct or not so I didn't send them.
drivers/gpu/drm/amd/amdgpu/cz_smc.c:463 cz_smu_populate_single_firmware_entry() warn: should '((header->jt_offset)) << 2' be a 64 bit type?
drivers/gpu/drm/amd/amdgpu/fiji_smc.c:404 fiji_smu_populate_single_firmware_entry() warn: should '((header->jt_offset)) << 2' be a 64 bit type?
drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c:724 amdgpu_cgs_get_firmware_info() warn: should '((header->jt_offset)) << 2' be a 64 bit type?
drivers/gpu/drm/amd/amdgpu/tonga_smc.c:406 tonga_smu_populate_single_firmware_entry() warn: should '((header->jt_offset)) << 2' be a 64 bit type?
drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c:615 amdgpu_gem_op_ioctl() warn: should 'robj->tbo.mem.page_alignment << 12' be a 64 bit type?
regards,
dan carpenter
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