/* * Copyright (c) 2006, 2013, Oracle and/or its affiliates. All rights reserved. */ /** * \file drm_agpsupport.c * DRM support for AGP/GART backend * * \author Rickard E. (Rik) Faith * \author Gareth Hughes */ /* * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. * Copyright (c) 2009, 2013, Intel Corporation. * 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. */ #include "drm.h" #include "drmP.h" #ifndef AGP_PAGE_SIZE #define AGP_PAGE_SIZE 4096 #define AGP_PAGE_SHIFT 12 #endif /* * The agpa_key field of struct agp_allocate_t actually is * an index to an array. It can be zero. But we will use * this agpa_key as a handle returned to userland. Generally, * 0 is not a valid value for a handle, so we add an offset * to the key to get a handle. */ #define DRM_AGP_KEY_OFFSET 8 void drm_agp_cleanup(struct drm_device *dev) { struct drm_agp_head *agp = dev->agp; (void) ldi_close(agp->agpgart_lh, FEXCL, kcred); ldi_ident_release(agp->agpgart_li); } /** * Get AGP information. * * \param inode device inode. * \param file_priv DRM file private. * \param cmd command. * \param arg pointer to a (output) drm_agp_info structure. * \return zero on success or a negative number on failure. * * Verifies the AGP device has been initialized and acquired and fills in the * drm_agp_info structure with the information in drm_agp_head::agp_info. */ int drm_agp_info(struct drm_device *dev, struct drm_agp_info *info) { agp_info_t *agpinfo; if (!dev->agp || !dev->agp->acquired) return -EINVAL; agpinfo = &dev->agp->agp_info; info->agp_version_major = agpinfo->agpi_version.agpv_major; info->agp_version_minor = agpinfo->agpi_version.agpv_minor; info->mode = agpinfo->agpi_mode; info->aperture_base = agpinfo->agpi_aperbase; info->aperture_size = agpinfo->agpi_apersize * 1024 * 1024; info->memory_allowed = agpinfo->agpi_pgtotal << PAGE_SHIFT; info->memory_used = agpinfo->agpi_pgused << PAGE_SHIFT; info->id_vendor = agpinfo->agpi_devid & 0xffff; info->id_device = agpinfo->agpi_devid >> 16; return 0; } /* LINTED */ int drm_agp_info_ioctl(DRM_IOCTL_ARGS) { struct drm_agp_info *info = data; int err; err = drm_agp_info(dev, info); if (err) return err; return 0; } /** * Acquire the AGP device. * * \param dev DRM device that is to acquire AGP. * \return zero on success or a negative number on failure. * * Verifies the AGP device hasn't been acquired before and calls * \c agp_backend_acquire. */ int drm_agp_acquire(struct drm_device * dev) { if (!dev->agp) return -ENODEV; if (dev->agp->acquired) return -EBUSY; { int ret, rval; if (ret = ldi_ioctl(dev->agp->agpgart_lh, AGPIOC_ACQUIRE, (uintptr_t)0, FKIOCTL, kcred, &rval)) { DRM_ERROR("AGPIOC_ACQUIRE failed"); return -ret; } } dev->agp->acquired = 1; return 0; } /** * Acquire the AGP device (ioctl). * * \param inode device inode. * \param file_priv DRM file private. * \param cmd command. * \param arg user argument. * \return zero on success or a negative number on failure. * * Verifies the AGP device hasn't been acquired before and calls * \c agp_backend_acquire. */ /* LINTED */ int drm_agp_acquire_ioctl(DRM_IOCTL_ARGS) { return drm_agp_acquire((struct drm_device *) file->minor->dev); } /** * Release the AGP device. * * \param dev DRM device that is to release AGP. * \return zero on success or a negative number on failure. * * Verifies the AGP device has been acquired and calls \c agp_backend_release. */ int drm_agp_release(struct drm_device * dev) { if (!dev->agp || !dev->agp->acquired) return -EINVAL; { int ret, rval; if (ret = ldi_ioctl(dev->agp->agpgart_lh, AGPIOC_RELEASE, (intptr_t)0, FKIOCTL, kcred, &rval)) { DRM_ERROR("AGPIOC_RELEASE failed"); return -ret; } } dev->agp->acquired = 0; return 0; } /* LINTED */ int drm_agp_release_ioctl(DRM_IOCTL_ARGS) { return drm_agp_release(dev); } /** * Enable the AGP bus. * * \param dev DRM device that has previously acquired AGP. * \param mode Requested AGP mode. * \return zero on success or a negative number on failure. * * Verifies the AGP device has been acquired but not enabled, and calls * \c agp_enable. */ int drm_agp_enable(struct drm_device * dev, struct drm_agp_mode mode) { if (!dev->agp || !dev->agp->acquired) return -EINVAL; dev->agp->mode = mode.mode; { agp_setup_t setup; int ret, rval; setup.agps_mode = (uint32_t)mode.mode; if (ret = ldi_ioctl(dev->agp->agpgart_lh, AGPIOC_SETUP, (intptr_t)&setup, FKIOCTL, kcred, &rval)) { DRM_ERROR("AGPIOC_SETUP failed"); return -ret; } } dev->agp->enabled = 1; return 0; } /* LINTED */ int drm_agp_enable_ioctl(DRM_IOCTL_ARGS) { struct drm_agp_mode *mode = data; return drm_agp_enable(dev, *mode); } /** * Allocate AGP memory. * * \param inode device inode. * \param file_priv file private pointer. * \param cmd command. * \param arg pointer to a drm_agp_buffer structure. * \return zero on success or a negative number on failure. * * Verifies the AGP device is present and has been acquired, allocates the * memory via alloc_agp() and creates a drm_agp_mem entry for it. */ int drm_agp_alloc(struct drm_device *dev, struct drm_agp_buffer *request) { struct drm_agp_mem *entry; agp_allocate_t alloc; unsigned long pages; int ret, rval; if (!dev->agp || !dev->agp->acquired) return -EINVAL; if (!(entry = kmalloc(sizeof(*entry), GFP_KERNEL))) return -ENOMEM; (void) memset(entry, 0, sizeof(*entry)); pages = (request->size + PAGE_SIZE - 1) / PAGE_SIZE; alloc.agpa_pgcount = (uint32_t) pages; alloc.agpa_type = AGP_NORMAL; ret = ldi_ioctl(dev->agp->agpgart_lh, AGPIOC_ALLOCATE, (intptr_t)&alloc, FKIOCTL, kcred, &rval); if (ret) { DRM_ERROR("AGPIOC_ALLOCATE failed"); kfree(entry, sizeof (*entry)); return -ret; } entry->handle = alloc.agpa_key + DRM_AGP_KEY_OFFSET; entry->bound = 0; entry->pages = (int) pages; list_add(&entry->head, &dev->agp->memory, (caddr_t)entry); request->handle = entry->handle; request->physical = alloc.agpa_physical; return 0; } /* LINTED */ int drm_agp_alloc_ioctl(DRM_IOCTL_ARGS) { struct drm_agp_buffer *request = data; return drm_agp_alloc(dev, request); } /** * Search for the AGP memory entry associated with a handle. * * \param dev DRM device structure. * \param handle AGP memory handle. * \return pointer to the drm_agp_mem structure associated with \p handle. * * Walks through drm_agp_head::memory until finding a matching handle. */ static struct drm_agp_mem *drm_agp_lookup_entry(struct drm_device * dev, unsigned long handle) { struct drm_agp_mem *entry; list_for_each_entry(entry, struct drm_agp_mem, &dev->agp->memory, head) { if (entry->handle == handle) return entry; } return NULL; } /** * Unbind AGP memory from the GATT (ioctl). * * \param inode device inode. * \param file_priv DRM file private. * \param cmd command. * \param arg pointer to a drm_agp_binding structure. * \return zero on success or a negative number on failure. * * Verifies the AGP device is present and acquired, looks-up the AGP memory * entry and passes it to the unbind_agp() function. */ int drm_agp_unbind(struct drm_device *dev, struct drm_agp_binding *request) { struct drm_agp_mem *entry; int ret; if (!dev->agp || !dev->agp->acquired) return -EINVAL; if (!(entry = drm_agp_lookup_entry(dev, request->handle))) return -EINVAL; if (!entry->bound) return -EINVAL; { agp_unbind_t unbind; int rval; unbind.agpu_pri = 0; unbind.agpu_key = (uintptr_t)entry->handle - DRM_AGP_KEY_OFFSET; if (ret = ldi_ioctl(dev->agp->agpgart_lh, AGPIOC_UNBIND, (intptr_t)&unbind, FKIOCTL, kcred, &rval)) { DRM_ERROR("AGPIOC_UNBIND failed"); return -ret; } } entry->bound = 0; return ret; } /* LINTED */ int drm_agp_unbind_ioctl(DRM_IOCTL_ARGS) { struct drm_agp_binding *request = data; return drm_agp_unbind(dev, request); } /** * Bind AGP memory into the GATT (ioctl) * * \param inode device inode. * \param file_priv DRM file private. * \param cmd command. * \param arg pointer to a drm_agp_binding structure. * \return zero on success or a negative number on failure. * * Verifies the AGP device is present and has been acquired and that no memory * is currently bound into the GATT. Looks-up the AGP memory entry and passes * it to bind_agp() function. */ int drm_agp_bind(struct drm_device *dev, struct drm_agp_binding *request) { struct drm_agp_mem *entry; int retcode; int page; if (!dev->agp || !dev->agp->acquired) return -EINVAL; if (!(entry = drm_agp_lookup_entry(dev, request->handle))) return -EINVAL; if (entry->bound) return -EINVAL; page = (request->offset + PAGE_SIZE - 1) / PAGE_SIZE; { uint_t key = (uintptr_t)entry->handle - DRM_AGP_KEY_OFFSET; if (retcode = drm_agp_bind_memory(key, page, dev)) { DRM_ERROR("failed key=0x%x, page=0x%x, " "agp_base=0x%lx", key, page, dev->agp->base); return retcode; } } entry->bound = dev->agp->base + (page << PAGE_SHIFT); DRM_DEBUG("base = 0x%lx entry->bound = 0x%lx\n", dev->agp->base, entry->bound); return 0; } /* LINTED */ int drm_agp_bind_ioctl(DRM_IOCTL_ARGS) { struct drm_agp_binding *request = data; return drm_agp_bind(dev, request); } /** * Free AGP memory (ioctl). * * \param inode device inode. * \param file_priv DRM file private. * \param cmd command. * \param arg pointer to a drm_agp_buffer structure. * \return zero on success or a negative number on failure. * * Verifies the AGP device is present and has been acquired and looks up the * AGP memory entry. If the memory it's currently bound, unbind it via * unbind_agp(). Frees it via free_agp() as well as the entry itself * and unlinks from the doubly linked list it's inserted in. */ int drm_agp_free(struct drm_device *dev, struct drm_agp_buffer *request) { struct drm_agp_mem *entry; if (!dev->agp || !dev->agp->acquired) return -EINVAL; if (!(entry = drm_agp_lookup_entry(dev, request->handle))) return -EINVAL; if (entry->bound) (void) drm_agp_unbind_memory(request->handle, dev); list_del(&entry->head); { int agpu_key = (uintptr_t)entry->handle - DRM_AGP_KEY_OFFSET; int ret, rval; ret = ldi_ioctl(dev->agp->agpgart_lh, AGPIOC_DEALLOCATE, (intptr_t)agpu_key, FKIOCTL, kcred, &rval); if (ret) { DRM_ERROR("AGPIOC_DEALLOCATE failed," "akey=%d, ret=%d", agpu_key, ret); return -ret; } } kfree(entry, sizeof (*entry)); return 0; } /* LINTED */ int drm_agp_free_ioctl(DRM_IOCTL_ARGS) { struct drm_agp_buffer *request = data; return drm_agp_free(dev, request); } /** * Initialize the AGP resources. * * \return pointer to a drm_agp_head structure. * * Gets the drm_agp_t structure which is made available by the agpgart module * via the inter_module_* functions. Creates and initializes a drm_agp_head * structure. */ struct drm_agp_head *drm_agp_init(struct drm_device *dev) { struct drm_agp_head *head = NULL; int ret, rval; if (!(head = kmalloc(sizeof(*head), GFP_KERNEL))) return NULL; (void) memset((void *)head, 0, sizeof(*head)); ret = ldi_ident_from_dip(dev->devinfo, &head->agpgart_li); if (ret) { DRM_ERROR("failed to get layerd ident, ret=%d", ret); goto err_1; } ret = ldi_open_by_name(AGP_DEVICE, FEXCL, kcred, &head->agpgart_lh, head->agpgart_li); if (ret) { DRM_ERROR("failed to open %s, ret=%d", AGP_DEVICE, ret); goto err_2; } ret = ldi_ioctl(head->agpgart_lh, AGPIOC_INFO, (intptr_t)&head->agp_info, FKIOCTL, kcred, &rval); if (ret) { DRM_ERROR("failed to get agpinfo, ret=%d", ret); goto err_3; } INIT_LIST_HEAD(&head->memory); head->base = head->agp_info.agpi_aperbase; return head; err_3: (void) ldi_close(head->agpgart_lh, FEXCL, kcred); err_2: ldi_ident_release(head->agpgart_li); err_1: kfree(head, sizeof(*head)); return NULL; } /* LINTED */ void *drm_agp_allocate_memory(size_t pages, uint32_t type, struct drm_device *dev) { return NULL; } /* LINTED */ int drm_agp_free_memory(agp_allocate_t *handle, struct drm_device *dev) { return 1; } int drm_agp_bind_memory(unsigned int key, uint32_t start, struct drm_device *dev) { agp_bind_t bind; int ret, rval; bind.agpb_pgstart = start; bind.agpb_key = key; if (ret = ldi_ioctl(dev->agp->agpgart_lh, AGPIOC_BIND, (intptr_t)&bind, FKIOCTL, kcred, &rval)) { DRM_DEBUG("AGPIOC_BIND failed"); return -ret; } return 0; } int drm_agp_unbind_memory(unsigned long handle, struct drm_device *dev) { struct drm_agp_mem *entry; agp_unbind_t unbind; int ret, rval; if (!dev->agp || !dev->agp->acquired) return -EINVAL; entry = drm_agp_lookup_entry(dev, handle); if (!entry || !entry->bound) return -EINVAL; unbind.agpu_pri = 0; unbind.agpu_key = (uintptr_t)entry->handle - DRM_AGP_KEY_OFFSET; if (ret = ldi_ioctl(dev->agp->agpgart_lh, AGPIOC_UNBIND, (intptr_t)&unbind, FKIOCTL, kcred, &rval)) { DRM_ERROR("AGPIO_UNBIND failed"); return -ret; } entry->bound = 0; return 0; } /** * Binds a collection of pages into AGP memory at the given offset, returning * the AGP memory structure containing them. * * No reference is held on the pages during this time -- it is up to the * caller to handle that. */ int drm_agp_bind_pages(struct drm_device *dev, pfn_t *pages, unsigned long num_pages, uint32_t gtt_offset, unsigned int agp_type) { agp_bind_pages_t bind; int ret, rval; bind.agpb_pgstart = gtt_offset / AGP_PAGE_SIZE; bind.agpb_pgcount = num_pages; bind.agpb_pages = pages; bind.agpb_type = agp_type; ret = ldi_ioctl(dev->agp->agpgart_lh, AGPIOC_PAGES_BIND, (intptr_t)&bind, FKIOCTL, kcred, &rval); if (ret) { DRM_ERROR("AGPIOC_PAGES_BIND failed ret %d", ret); return -ret; } return 0; } int drm_agp_unbind_pages(struct drm_device *dev, pfn_t *pages, /* NULL */ unsigned long num_pages, uint32_t gtt_offset, pfn_t scratch, uint32_t ignored) /* old "VT_switch" flag */ { agp_unbind_pages_t unbind; int ret, rval; unbind.agpu_pgstart = gtt_offset / AGP_PAGE_SIZE; unbind.agpu_pgcount = num_pages; unbind.agpu_scratch = scratch; unbind.agpu_flags = 0; ret = ldi_ioctl(dev->agp->agpgart_lh, AGPIOC_PAGES_UNBIND, (intptr_t)&unbind, FKIOCTL, kcred, &rval); if (ret) { DRM_ERROR("AGPIOC_PAGES_UNBIND failed %d", ret); return -ret; } return 0; } void drm_agp_chipset_flush(struct drm_device *dev) { int ret, rval; ret = ldi_ioctl(dev->agp->agpgart_lh, AGPIOC_FLUSHCHIPSET, (intptr_t)0, FKIOCTL, kcred, &rval); if (ret) DRM_ERROR("AGPIOC_FLUSHCHIPSET failed, ret=%d", ret); } int drm_agp_rw_gtt(struct drm_device *dev, unsigned long num_pages, uint32_t gtt_offset, void *gttp, uint32_t rw_flag) /* read = 0 write = 1 */ { agp_rw_gtt_t rw; int ret, rval; rw.agprw_pgstart = gtt_offset / AGP_PAGE_SIZE; rw.agprw_pgcount = num_pages; rw.agprw_addr = gttp; rw.agprw_flags = rw_flag; ret = ldi_ioctl(dev->agp->agpgart_lh, AGPIOC_RW_GTT, (intptr_t)&rw, FKIOCTL, kcred, &rval); if (ret) { DRM_ERROR("AGPIOC_RW_GTT failed %d", ret); return -ret; } return 0; }