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drm/amdkfd: Fix doorbell initialization and finalization 

Handle errors in doorbell aperture initialization instead of BUG_ON.
iounmap doorbell aperture during finalization.

Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
This commit is contained in:
Felix Kuehling 2017-08-15 23:00:10 -04:00 committed by Oded Gabbay
parent 4f52f2256e
commit 735df2ba1d
3 changed files with 21 additions and 4 deletions
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9
drivers/gpu/drm/amd/amdkfd/kfd_device.c
View File

@ -260,7 +260,11 @@ bool kgd2kfd_device_init(struct kfd_dev *kfd,
goto kfd_gtt_sa_init_error;
}
kfd_doorbell_init(kfd);
if (kfd_doorbell_init(kfd)) {
dev_err(kfd_device,
"Error initializing doorbell aperture\n");
goto kfd_doorbell_error;
}
if (kfd_topology_add_device(kfd)) {
dev_err(kfd_device, "Error adding device to topology\n");
@ -315,6 +319,8 @@ bool kgd2kfd_device_init(struct kfd_dev *kfd,
kfd_interrupt_error:
kfd_topology_remove_device(kfd);
kfd_topology_add_device_error:
kfd_doorbell_fini(kfd);
kfd_doorbell_error:
kfd_gtt_sa_fini(kfd);
kfd_gtt_sa_init_error:
kfd->kfd2kgd->free_gtt_mem(kfd->kgd, kfd->gtt_mem);
@ -332,6 +338,7 @@ void kgd2kfd_device_exit(struct kfd_dev *kfd)
amd_iommu_free_device(kfd->pdev);
kfd_interrupt_exit(kfd);
kfd_topology_remove_device(kfd);
kfd_doorbell_fini(kfd);
kfd_gtt_sa_fini(kfd);
kfd->kfd2kgd->free_gtt_mem(kfd->kgd, kfd->gtt_mem);
}

13
drivers/gpu/drm/amd/amdkfd/kfd_doorbell.c
View File

@ -59,7 +59,7 @@ static inline size_t doorbell_process_allocation(void)
}
/* Doorbell calculations for device init. */
void kfd_doorbell_init(struct kfd_dev *kfd)
int kfd_doorbell_init(struct kfd_dev *kfd)
{
size_t doorbell_start_offset;
size_t doorbell_aperture_size;
@ -95,7 +95,8 @@ void kfd_doorbell_init(struct kfd_dev *kfd)
kfd->doorbell_kernel_ptr = ioremap(kfd->doorbell_base,
doorbell_process_allocation());
BUG_ON(!kfd->doorbell_kernel_ptr);
if (!kfd->doorbell_kernel_ptr)
return -ENOMEM;
pr_debug("Doorbell initialization:\n");
pr_debug("doorbell base == 0x%08lX\n",
@ -115,6 +116,14 @@ void kfd_doorbell_init(struct kfd_dev *kfd)
pr_debug("doorbell kernel address == 0x%08lX\n",
(uintptr_t)kfd->doorbell_kernel_ptr);
return 0;
}
void kfd_doorbell_fini(struct kfd_dev *kfd)
{
if (kfd->doorbell_kernel_ptr)
iounmap(kfd->doorbell_kernel_ptr);
}
int kfd_doorbell_mmap(struct kfd_process *process, struct vm_area_struct *vma)

3
drivers/gpu/drm/amd/amdkfd/kfd_priv.h
View File

@ -576,7 +576,8 @@ unsigned int kfd_pasid_alloc(void);
void kfd_pasid_free(unsigned int pasid);
/* Doorbells */
void kfd_doorbell_init(struct kfd_dev *kfd);
int kfd_doorbell_init(struct kfd_dev *kfd);
void kfd_doorbell_fini(struct kfd_dev *kfd);
int kfd_doorbell_mmap(struct kfd_process *process, struct vm_area_struct *vma);
u32 __iomem *kfd_get_kernel_doorbell(struct kfd_dev *kfd,
unsigned int *doorbell_off);