tree: git://people.freedesktop.org/~gabbayo/linux amdkfd-next
head: 9f0a0b41ffccf9a76b19ea263ae16d2d5888093e
commit: 373d7080896a3cb3b28ae3a2abdafb7bb87552b1 [10/53] drm/amdkfd: Add CWSR support
reproduce:
# apt-get install sparse
git checkout 373d7080896a3cb3b28ae3a2abdafb7bb87552b1
make ARCH=x86_64 allmodconfig
make C=1 CF=-D__CHECK_ENDIAN__
sparse warnings: (new ones prefixed by >>)
vim +289 drivers/gpu/drm/amd/amdkfd/kfd_process.c
273
274 static int kfd_process_init_cwsr(struct kfd_process *p, struct file *filep)
275 {
276 int err = 0;
277 unsigned long offset;
278 struct kfd_process_device *temp, *pdd = NULL;
279 struct kfd_dev *dev = NULL;
280 struct qcm_process_device *qpd = NULL;
281
282 mutex_lock(&p->mutex);
283 list_for_each_entry_safe(pdd, temp, &p->per_device_data,
284 per_device_list) {
285 dev = pdd->dev;
286 qpd = &pdd->qpd;
287 if (!dev->cwsr_enabled || qpd->cwsr_kaddr)
288 continue;
> 289 offset = (dev->id | KFD_MMAP_RESERVED_MEM_MASK) << PAGE_SHIFT;
290 qpd->tba_addr = (int64_t)vm_mmap(filep, 0,
291 KFD_CWSR_TBA_TMA_SIZE, PROT_READ | PROT_EXEC,
292 MAP_SHARED, offset);
293
294 if (IS_ERR_VALUE(qpd->tba_addr)) {
295 pr_err("Failure to set tba address. error -%d.\n",
296 (int)qpd->tba_addr);
297 err = qpd->tba_addr;
298 qpd->tba_addr = 0;
299 qpd->cwsr_kaddr = NULL;
300 goto out;
301 }
302
303 memcpy(qpd->cwsr_kaddr, dev->cwsr_isa, dev->cwsr_isa_size);
304
305 qpd->tma_addr = qpd->tba_addr + KFD_CWSR_TMA_OFFSET;
306 pr_debug("set tba :0x%llx, tma:0x%llx, cwsr_kaddr:%p for pqm.\n",
307 qpd->tba_addr, qpd->tma_addr, qpd->cwsr_kaddr);
308 }
309 out:
310 mutex_unlock(&p->mutex);
311 return err;
312 }
313
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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