32  * kernel queues using the first doorbell page reserved for the kernel.
36  * Each device exposes a doorbell aperture, a PCI MMIO aperture that
41  * We map the doorbell address space into user-mode when a process creates
49 /* # of doorbell bytes allocated for each process. */
61 /* Doorbell calculations for device init. */
68 	 * Todo: KFD kernel level operations need only one doorbell for  in kfd_doorbell_init()
70 	 * kernel, reserve and consume a doorbell from existing KGD kernel  in kfd_doorbell_init()
71 	 * doorbell page.  in kfd_doorbell_init()
77 		DRM_ERROR("Failed to allocate kernel doorbell bitmap\n");  in kfd_doorbell_init()
81 	/* Alloc a doorbell page for KFD kernel usages */  in kfd_doorbell_init()
95 	pr_debug("Doorbell kernel address == %p\n", kfd->doorbell_kernel_ptr);  in kfd_doorbell_init()
113 	 * For simplicitly we only allow mapping of the entire doorbell  in kfd_doorbell_mmap()
123 	/* Calculate physical address of doorbell */  in kfd_doorbell_mmap()
132 	pr_debug("Mapping doorbell page\n"  in kfd_doorbell_mmap()
149 /* get kernel iomem pointer for a doorbell */
170 	pr_debug("Get kernel queue doorbell\n"  in kfd_get_kernel_doorbell()
171 			"     doorbell offset   == 0x%08X\n"  in kfd_get_kernel_doorbell()
172 			"     doorbell index    == 0x%x\n",  in kfd_get_kernel_doorbell()
194 		pr_debug("Writing %d to doorbell address %p\n", value, db);  in write_kernel_doorbell()
202 		     "Unaligned 64-bit doorbell");  in write_kernel_doorbell64()
204 		pr_debug("writing %llu to doorbell address %p\n", value, db);  in write_kernel_doorbell64()
219 	pr_debug("reserved doorbell 0x%03x - 0x%03x\n", range_start, range_end);  in init_doorbell_bitmap()
220 	pr_debug("reserved doorbell 0x%03x - 0x%03x\n",  in init_doorbell_bitmap()
250 	return adev->doorbell.base + first_db_index * sizeof(uint32_t);  in kfd_get_process_doorbells()
258 	/* Allocate bitmap for dynamic doorbell allocation */  in kfd_alloc_process_doorbells()
262 		DRM_ERROR("Failed to allocate process doorbell bitmap\n");  in kfd_alloc_process_doorbells()