313 	rdev->doorbell.base = pci_resource_start(rdev->pdev, 2);  in radeon_doorbell_init()
314 	rdev->doorbell.size = pci_resource_len(rdev->pdev, 2);  in radeon_doorbell_init()
316 	rdev->doorbell.num_doorbells = min_t(u32, rdev->doorbell.size / sizeof(u32), RADEON_MAX_DOORBELLS);  in radeon_doorbell_init()
317 	if (rdev->doorbell.num_doorbells == 0)  in radeon_doorbell_init()
320 	rdev->doorbell.ptr = ioremap(rdev->doorbell.base, rdev->doorbell.num_doorbells * sizeof(u32));  in radeon_doorbell_init()
321 	if (rdev->doorbell.ptr == NULL) {  in radeon_doorbell_init()
324 	DRM_INFO("doorbell mmio base: 0x%08X\n", (uint32_t)rdev->doorbell.base);  in radeon_doorbell_init()
325 	DRM_INFO("doorbell mmio size: %u\n", (unsigned)rdev->doorbell.size);  in radeon_doorbell_init()
327 	memset(&rdev->doorbell.used, 0, sizeof(rdev->doorbell.used));  in radeon_doorbell_init()
341 	iounmap(rdev->doorbell.ptr);  in radeon_doorbell_fini()
342 	rdev->doorbell.ptr = NULL;  in radeon_doorbell_fini()
354 int radeon_doorbell_get(struct radeon_device *rdev, u32 *doorbell)  in radeon_doorbell_get()  argument
356 	unsigned long offset = find_first_zero_bit(rdev->doorbell.used, rdev->doorbell.num_doorbells);  in radeon_doorbell_get()
357 	if (offset < rdev->doorbell.num_doorbells) {  in radeon_doorbell_get()
358 		__set_bit(offset, rdev->doorbell.used);  in radeon_doorbell_get()
359 		*doorbell = offset;  in radeon_doorbell_get()
374 void radeon_doorbell_free(struct radeon_device *rdev, u32 doorbell)  in radeon_doorbell_free()  argument
376 	if (doorbell < rdev->doorbell.num_doorbells)  in radeon_doorbell_free()
377 		__clear_bit(doorbell, rdev->doorbell.used);  in radeon_doorbell_free()
400 	if (rdev->doorbell.size > rdev->doorbell.num_doorbells * sizeof(u32)) {  in radeon_doorbell_get_kfd_info()
401 		*aperture_base = rdev->doorbell.base;  in radeon_doorbell_get_kfd_info()
402 		*aperture_size = rdev->doorbell.size;  in radeon_doorbell_get_kfd_info()
403 		*start_offset = rdev->doorbell.num_doorbells * sizeof(u32);  in radeon_doorbell_get_kfd_info()