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drm/amdkfd: Allocate CWSR trap handler memory for dGPUs

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Add helpers for allocating GPUVM memory in kernel mode and use them
to allocate memory for the CWSR trap handler.

v2: Use dev instead of pdd->dev in kfd_process_free_gpuvm
v3:
* Cleaned up and simplified kfd_process_alloc_gpuvm
* Moved allocation for dGPU to kfd_process_device_init_vm

Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
This commit is contained in:
Felix Kuehling 2018-03-15 17:27:49 -04:00 committed by Oded Gabbay
parent 52b29d7334
commit f35751b870
1 changed files with 127 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

137
drivers/gpu/drm/amd/amdkfd/kfd_process.c
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@ -54,7 +54,6 @@ static struct kfd_process *find_process(const struct task_struct *thread);
static void kfd_process_ref_release(struct kref *ref);
static struct kfd_process *create_process(const struct task_struct *thread,
struct file *filep);
static int kfd_process_init_cwsr(struct kfd_process *p, struct file *filep);
static void evict_process_worker(struct work_struct *work);
static void restore_process_worker(struct work_struct *work);
@ -74,6 +73,82 @@ void kfd_process_destroy_wq(void)
}
}
static void kfd_process_free_gpuvm(struct kgd_mem *mem,
struct kfd_process_device *pdd)
{
struct kfd_dev *dev = pdd->dev;
dev->kfd2kgd->unmap_memory_to_gpu(dev->kgd, mem, pdd->vm);
dev->kfd2kgd->free_memory_of_gpu(dev->kgd, mem);
}
/* kfd_process_alloc_gpuvm - Allocate GPU VM for the KFD process
* This function should be only called right after the process
* is created and when kfd_processes_mutex is still being held
* to avoid concurrency. Because of that exclusiveness, we do
* not need to take p->mutex.
*/
static int kfd_process_alloc_gpuvm(struct kfd_process_device *pdd,
uint64_t gpu_va, uint32_t size,
uint32_t flags, void **kptr)
{
struct kfd_dev *kdev = pdd->dev;
struct kgd_mem *mem = NULL;
int handle;
int err;
err = kdev->kfd2kgd->alloc_memory_of_gpu(kdev->kgd, gpu_va, size,
pdd->vm, &mem, NULL, flags);
if (err)
goto err_alloc_mem;
err = kdev->kfd2kgd->map_memory_to_gpu(kdev->kgd, mem, pdd->vm);
if (err)
goto err_map_mem;
err = kdev->kfd2kgd->sync_memory(kdev->kgd, mem, true);
if (err) {
pr_debug("Sync memory failed, wait interrupted by user signal\n");
goto sync_memory_failed;
}
/* Create an obj handle so kfd_process_device_remove_obj_handle
* will take care of the bo removal when the process finishes.
* We do not need to take p->mutex, because the process is just
* created and the ioctls have not had the chance to run.
*/
handle = kfd_process_device_create_obj_handle(pdd, mem);
if (handle < 0) {
err = handle;
goto free_gpuvm;
}
if (kptr) {
err = kdev->kfd2kgd->map_gtt_bo_to_kernel(kdev->kgd,
(struct kgd_mem *)mem, kptr, NULL);
if (err) {
pr_debug("Map GTT BO to kernel failed\n");
goto free_obj_handle;
}
}
return err;
free_obj_handle:
kfd_process_device_remove_obj_handle(pdd, handle);
free_gpuvm:
sync_memory_failed:
kfd_process_free_gpuvm(mem, pdd);
return err;
err_map_mem:
kdev->kfd2kgd->free_memory_of_gpu(kdev->kgd, mem);
err_alloc_mem:
*kptr = NULL;
return err;
}
struct kfd_process *kfd_create_process(struct file *filep)
{
struct kfd_process *process;
@ -201,7 +276,7 @@ static void kfd_process_destroy_pdds(struct kfd_process *p)
list_del(&pdd->per_device_list);
if (pdd->qpd.cwsr_kaddr)
if (pdd->qpd.cwsr_kaddr && !pdd->qpd.cwsr_base)
free_pages((unsigned long)pdd->qpd.cwsr_kaddr,
get_order(KFD_CWSR_TBA_TMA_SIZE));
@ -312,18 +387,18 @@ static const struct mmu_notifier_ops kfd_process_mmu_notifier_ops = {
.release = kfd_process_notifier_release,
};
static int kfd_process_init_cwsr(struct kfd_process *p, struct file *filep)
static int kfd_process_init_cwsr_apu(struct kfd_process *p, struct file *filep)
{
unsigned long offset;
struct kfd_process_device *pdd = NULL;
struct kfd_dev *dev = NULL;
struct qcm_process_device *qpd = NULL;
struct kfd_process_device *pdd;
list_for_each_entry(pdd, &p->per_device_data, per_device_list) {
dev = pdd->dev;
qpd = &pdd->qpd;
if (!dev->cwsr_enabled || qpd->cwsr_kaddr)
struct kfd_dev *dev = pdd->dev;
struct qcm_process_device *qpd = &pdd->qpd;
if (!dev->cwsr_enabled || qpd->cwsr_kaddr || qpd->cwsr_base)
continue;
offset = (dev->id | KFD_MMAP_RESERVED_MEM_MASK) << PAGE_SHIFT;
qpd->tba_addr = (int64_t)vm_mmap(filep, 0,
KFD_CWSR_TBA_TMA_SIZE, PROT_READ | PROT_EXEC,
@ -348,6 +423,36 @@ static int kfd_process_init_cwsr(struct kfd_process *p, struct file *filep)
return 0;
}
static int kfd_process_device_init_cwsr_dgpu(struct kfd_process_device *pdd)
{
struct kfd_dev *dev = pdd->dev;
struct qcm_process_device *qpd = &pdd->qpd;
uint32_t flags = ALLOC_MEM_FLAGS_GTT |
ALLOC_MEM_FLAGS_NO_SUBSTITUTE | ALLOC_MEM_FLAGS_EXECUTABLE;
void *kaddr;
int ret;
if (!dev->cwsr_enabled || qpd->cwsr_kaddr || !qpd->cwsr_base)
return 0;
/* cwsr_base is only set for dGPU */
ret = kfd_process_alloc_gpuvm(pdd, qpd->cwsr_base,
KFD_CWSR_TBA_TMA_SIZE, flags, &kaddr);
if (ret)
return ret;
qpd->cwsr_kaddr = kaddr;
qpd->tba_addr = qpd->cwsr_base;
memcpy(qpd->cwsr_kaddr, dev->cwsr_isa, dev->cwsr_isa_size);
qpd->tma_addr = qpd->tba_addr + KFD_CWSR_TMA_OFFSET;
pr_debug("set tba :0x%llx, tma:0x%llx, cwsr_kaddr:%p for pqm.\n",
qpd->tba_addr, qpd->tma_addr, qpd->cwsr_kaddr);
return 0;
}
static struct kfd_process *create_process(const struct task_struct *thread,
struct file *filep)
{
@ -402,7 +507,7 @@ static struct kfd_process *create_process(const struct task_struct *thread,
INIT_DELAYED_WORK(&process->restore_work, restore_process_worker);
process->last_restore_timestamp = get_jiffies_64();
err = kfd_process_init_cwsr(process, filep);
err = kfd_process_init_cwsr_apu(process, filep);
if (err)
goto err_init_cwsr;
@ -505,9 +610,21 @@ int kfd_process_device_init_vm(struct kfd_process_device *pdd,
return ret;
}
ret = kfd_process_device_init_cwsr_dgpu(pdd);
if (ret)
goto err_init_cwsr;
pdd->drm_file = drm_file;
return 0;
err_init_cwsr:
kfd_process_device_free_bos(pdd);
if (!drm_file)
dev->kfd2kgd->destroy_process_vm(dev->kgd, pdd->vm);
pdd->vm = NULL;
return ret;
}
/*