| /* drm_agpsupport.h -- DRM support for AGP/GART backend -*- linux-c -*- |
| * Created: Mon Dec 13 09:56:45 1999 by faith@precisioninsight.com |
| */ |
| /*- |
| * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. |
| * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. |
| * All Rights Reserved. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice (including the next |
| * paragraph) shall be included in all copies or substantial portions of the |
| * Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| * OTHER DEALINGS IN THE SOFTWARE. |
| * |
| * Author: |
| * Rickard E. (Rik) Faith <faith@valinux.com> |
| * Gareth Hughes <gareth@valinux.com> |
| * |
| */ |
| |
| #include "drmP.h" |
| |
| #ifdef __FreeBSD__ |
| #include <pci/agpreg.h> |
| #include <dev/pci/pcireg.h> |
| #endif |
| |
| /* Returns 1 if AGP or 0 if not. */ |
| static int |
| drm_device_find_capability(drm_device_t *dev, int cap) |
| { |
| #ifdef __FreeBSD__ |
| #if __FreeBSD_version >= 700010 |
| |
| return (pci_find_extcap(dev->device, cap, NULL) == 0); |
| #else |
| /* Code taken from agp.c. IWBNI that was a public interface. */ |
| u_int32_t status; |
| u_int8_t ptr, next; |
| |
| /* |
| * Check the CAP_LIST bit of the PCI status register first. |
| */ |
| status = pci_read_config(dev->device, PCIR_STATUS, 2); |
| if (!(status & 0x10)) |
| return 0; |
| |
| /* |
| * Traverse the capabilities list. |
| */ |
| for (ptr = pci_read_config(dev->device, AGP_CAPPTR, 1); |
| ptr != 0; |
| ptr = next) { |
| u_int32_t capid = pci_read_config(dev->device, ptr, 4); |
| next = AGP_CAPID_GET_NEXT_PTR(capid); |
| |
| /* |
| * If this capability entry ID is cap, then we are done. |
| */ |
| if (AGP_CAPID_GET_CAP_ID(capid) == cap) |
| return 1; |
| } |
| |
| return 0; |
| #endif |
| #else |
| /* XXX: fill me in for non-FreeBSD */ |
| return 1; |
| #endif |
| } |
| |
| int drm_device_is_agp(drm_device_t *dev) |
| { |
| if (dev->driver.device_is_agp != NULL) { |
| int ret; |
| |
| /* device_is_agp returns a tristate, 0 = not AGP, 1 = definitely |
| * AGP, 2 = fall back to PCI capability |
| */ |
| ret = (*dev->driver.device_is_agp)(dev); |
| if (ret != DRM_MIGHT_BE_AGP) |
| return ret; |
| } |
| |
| return (drm_device_find_capability(dev, PCIY_AGP)); |
| } |
| |
| int drm_device_is_pcie(drm_device_t *dev) |
| { |
| return (drm_device_find_capability(dev, PCIY_EXPRESS)); |
| } |
| |
| int drm_agp_info(drm_device_t * dev, drm_agp_info_t *info) |
| { |
| struct agp_info *kern; |
| |
| if (!dev->agp || !dev->agp->acquired) |
| return EINVAL; |
| |
| kern = &dev->agp->info; |
| agp_get_info(dev->agp->agpdev, kern); |
| info->agp_version_major = 1; |
| info->agp_version_minor = 0; |
| info->mode = kern->ai_mode; |
| info->aperture_base = kern->ai_aperture_base; |
| info->aperture_size = kern->ai_aperture_size; |
| info->memory_allowed = kern->ai_memory_allowed; |
| info->memory_used = kern->ai_memory_used; |
| info->id_vendor = kern->ai_devid & 0xffff; |
| info->id_device = kern->ai_devid >> 16; |
| |
| return 0; |
| } |
| |
| int drm_agp_info_ioctl(DRM_IOCTL_ARGS) |
| { |
| int err; |
| drm_agp_info_t info; |
| DRM_DEVICE; |
| |
| err = drm_agp_info(dev, &info); |
| if (err != 0) |
| return err; |
| |
| *(drm_agp_info_t *) data = info; |
| return 0; |
| } |
| |
| int drm_agp_acquire_ioctl(DRM_IOCTL_ARGS) |
| { |
| DRM_DEVICE; |
| |
| return drm_agp_acquire(dev); |
| } |
| |
| int drm_agp_acquire(drm_device_t *dev) |
| { |
| int retcode; |
| |
| if (!dev->agp || dev->agp->acquired) |
| return EINVAL; |
| |
| retcode = agp_acquire(dev->agp->agpdev); |
| if (retcode) |
| return retcode; |
| |
| dev->agp->acquired = 1; |
| return 0; |
| } |
| |
| int drm_agp_release_ioctl(DRM_IOCTL_ARGS) |
| { |
| DRM_DEVICE; |
| |
| return drm_agp_release(dev); |
| } |
| |
| int drm_agp_release(drm_device_t * dev) |
| { |
| if (!dev->agp || !dev->agp->acquired) |
| return EINVAL; |
| agp_release(dev->agp->agpdev); |
| dev->agp->acquired = 0; |
| return 0; |
| } |
| |
| int drm_agp_enable(drm_device_t *dev, drm_agp_mode_t mode) |
| { |
| |
| if (!dev->agp || !dev->agp->acquired) |
| return EINVAL; |
| |
| dev->agp->mode = mode.mode; |
| agp_enable(dev->agp->agpdev, mode.mode); |
| dev->agp->base = dev->agp->info.ai_aperture_base; |
| dev->agp->enabled = 1; |
| return 0; |
| } |
| |
| int drm_agp_enable_ioctl(DRM_IOCTL_ARGS) |
| { |
| drm_agp_mode_t mode; |
| DRM_DEVICE; |
| |
| mode = *(drm_agp_mode_t *) data; |
| |
| return drm_agp_enable(dev, mode); |
| } |
| |
| int drm_agp_alloc(drm_device_t *dev, drm_agp_buffer_t *request) |
| { |
| drm_agp_mem_t *entry; |
| void *handle; |
| unsigned long pages; |
| u_int32_t type; |
| struct agp_memory_info info; |
| |
| if (!dev->agp || !dev->agp->acquired) |
| return EINVAL; |
| |
| entry = malloc(sizeof(*entry), M_DRM, M_NOWAIT | M_ZERO); |
| if (entry == NULL) |
| return ENOMEM; |
| |
| pages = (request->size + PAGE_SIZE - 1) / PAGE_SIZE; |
| type = (u_int32_t) request->type; |
| |
| DRM_UNLOCK(); |
| handle = drm_agp_allocate_memory(pages, type); |
| DRM_LOCK(); |
| if (handle == NULL) { |
| free(entry, M_DRM); |
| return ENOMEM; |
| } |
| |
| entry->handle = handle; |
| entry->bound = 0; |
| entry->pages = pages; |
| entry->prev = NULL; |
| entry->next = dev->agp->memory; |
| if (dev->agp->memory) |
| dev->agp->memory->prev = entry; |
| dev->agp->memory = entry; |
| |
| agp_memory_info(dev->agp->agpdev, entry->handle, &info); |
| |
| request->handle = (unsigned long) entry->handle; |
| request->physical = info.ami_physical; |
| |
| return 0; |
| } |
| |
| int drm_agp_alloc_ioctl(DRM_IOCTL_ARGS) |
| { |
| DRM_DEVICE; |
| drm_agp_buffer_t request; |
| int retcode; |
| |
| request = *(drm_agp_buffer_t *) data; |
| |
| DRM_LOCK(); |
| retcode = drm_agp_alloc(dev, &request); |
| DRM_UNLOCK(); |
| |
| *(drm_agp_buffer_t *) data = request; |
| |
| return retcode; |
| } |
| |
| static drm_agp_mem_t * drm_agp_lookup_entry(drm_device_t *dev, void *handle) |
| { |
| drm_agp_mem_t *entry; |
| |
| for (entry = dev->agp->memory; entry; entry = entry->next) { |
| if (entry->handle == handle) return entry; |
| } |
| return NULL; |
| } |
| |
| int drm_agp_unbind(drm_device_t *dev, drm_agp_binding_t *request) |
| { |
| drm_agp_mem_t *entry; |
| int retcode; |
| |
| if (!dev->agp || !dev->agp->acquired) |
| return EINVAL; |
| |
| entry = drm_agp_lookup_entry(dev, (void *)request->handle); |
| if (entry == NULL || !entry->bound) |
| return EINVAL; |
| |
| DRM_UNLOCK(); |
| retcode = drm_agp_unbind_memory(entry->handle); |
| DRM_LOCK(); |
| |
| if (retcode == 0) |
| entry->bound = 0; |
| |
| return retcode; |
| } |
| |
| int drm_agp_unbind_ioctl(DRM_IOCTL_ARGS) |
| { |
| DRM_DEVICE; |
| drm_agp_binding_t request; |
| int retcode; |
| |
| request = *(drm_agp_binding_t *) data; |
| |
| DRM_LOCK(); |
| retcode = drm_agp_unbind(dev, &request); |
| DRM_UNLOCK(); |
| |
| return retcode; |
| } |
| |
| int drm_agp_bind(drm_device_t *dev, drm_agp_binding_t *request) |
| { |
| drm_agp_mem_t *entry; |
| int retcode; |
| int page; |
| |
| if (!dev->agp || !dev->agp->acquired) |
| return EINVAL; |
| |
| DRM_DEBUG("agp_bind, page_size=%x\n", PAGE_SIZE); |
| |
| entry = drm_agp_lookup_entry(dev, (void *)request->handle); |
| if (entry == NULL || entry->bound) |
| return EINVAL; |
| |
| page = (request->offset + PAGE_SIZE - 1) / PAGE_SIZE; |
| |
| DRM_UNLOCK(); |
| retcode = drm_agp_bind_memory(entry->handle, page); |
| DRM_LOCK(); |
| if (retcode == 0) |
| entry->bound = dev->agp->base + (page << PAGE_SHIFT); |
| |
| return retcode; |
| } |
| |
| int drm_agp_bind_ioctl(DRM_IOCTL_ARGS) |
| { |
| DRM_DEVICE; |
| drm_agp_binding_t request; |
| int retcode; |
| |
| request = *(drm_agp_binding_t *) data; |
| |
| DRM_LOCK(); |
| retcode = drm_agp_bind(dev, &request); |
| DRM_UNLOCK(); |
| |
| return retcode; |
| } |
| |
| int drm_agp_free(drm_device_t *dev, drm_agp_buffer_t *request) |
| { |
| drm_agp_mem_t *entry; |
| |
| if (!dev->agp || !dev->agp->acquired) |
| return EINVAL; |
| |
| entry = drm_agp_lookup_entry(dev, (void*)request->handle); |
| if (entry == NULL) |
| return EINVAL; |
| |
| if (entry->prev) |
| entry->prev->next = entry->next; |
| else |
| dev->agp->memory = entry->next; |
| if (entry->next) |
| entry->next->prev = entry->prev; |
| |
| DRM_UNLOCK(); |
| if (entry->bound) |
| drm_agp_unbind_memory(entry->handle); |
| drm_agp_free_memory(entry->handle); |
| DRM_LOCK(); |
| |
| free(entry, M_DRM); |
| |
| return 0; |
| |
| } |
| |
| int drm_agp_free_ioctl(DRM_IOCTL_ARGS) |
| { |
| DRM_DEVICE; |
| drm_agp_buffer_t request; |
| int retcode; |
| |
| request = *(drm_agp_buffer_t *) data; |
| |
| DRM_LOCK(); |
| retcode = drm_agp_free(dev, &request); |
| DRM_UNLOCK(); |
| |
| return retcode; |
| } |
| |
| drm_agp_head_t *drm_agp_init(void) |
| { |
| device_t agpdev; |
| drm_agp_head_t *head = NULL; |
| int agp_available = 1; |
| |
| agpdev = DRM_AGP_FIND_DEVICE(); |
| if (!agpdev) |
| agp_available = 0; |
| |
| DRM_DEBUG("agp_available = %d\n", agp_available); |
| |
| if (agp_available) { |
| head = malloc(sizeof(*head), M_DRM, M_NOWAIT | M_ZERO); |
| if (head == NULL) |
| return NULL; |
| head->agpdev = agpdev; |
| agp_get_info(agpdev, &head->info); |
| head->memory = NULL; |
| DRM_INFO("AGP at 0x%08lx %dMB\n", |
| (long)head->info.ai_aperture_base, |
| (int)(head->info.ai_aperture_size >> 20)); |
| } |
| return head; |
| } |
| |
| void *drm_agp_allocate_memory(size_t pages, u32 type) |
| { |
| device_t agpdev; |
| |
| agpdev = DRM_AGP_FIND_DEVICE(); |
| if (!agpdev) |
| return NULL; |
| |
| return agp_alloc_memory(agpdev, type, pages << AGP_PAGE_SHIFT); |
| } |
| |
| int drm_agp_free_memory(void *handle) |
| { |
| device_t agpdev; |
| |
| agpdev = DRM_AGP_FIND_DEVICE(); |
| if (!agpdev || !handle) |
| return 0; |
| |
| agp_free_memory(agpdev, handle); |
| return 1; |
| } |
| |
| int drm_agp_bind_memory(void *handle, off_t start) |
| { |
| device_t agpdev; |
| |
| agpdev = DRM_AGP_FIND_DEVICE(); |
| if (!agpdev || !handle) |
| return EINVAL; |
| |
| return agp_bind_memory(agpdev, handle, start * PAGE_SIZE); |
| } |
| |
| int drm_agp_unbind_memory(void *handle) |
| { |
| device_t agpdev; |
| |
| agpdev = DRM_AGP_FIND_DEVICE(); |
| if (!agpdev || !handle) |
| return EINVAL; |
| |
| return agp_unbind_memory(agpdev, handle); |
| } |