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path: root/shared-core/mga_dma.c
AgeCommit message (Expand)Author
2008-01-03drm: cleanup DRM_DEBUG() parametersMárton Németh
2007-12-17While reading some code I stumbled across the use of 'err' inJesper Juhl
2007-11-22drm: major whitespace/coding style realignment with kernelDave Airlie
2007-11-05drm: remove lots of spurious whitespace.Dave Airlie
2007-07-20Replace DRM_IOCTL_ARGS with (dev, data, file_priv) and remove DRM_DEVICE.Eric Anholt
2007-07-20Replace filp in ioctl arguments with drm_file *file_priv.Eric Anholt
2007-07-20Remove DRM_ERR OS macro.Eric Anholt
2007-07-16drm: remove drm_buf_tDave Airlie
2007-07-16drm: remove drmP.h internal typedefsDave Airlie
2007-07-16drm: detypedef drm.h and fixup all problemsDave Airlie
2007-05-26drm: cleanup use of Linux list handling macrosDave Airlie
2007-04-28remove DRM_GETSAREA and replace with drm_getsarea functionDave Airlie
2005-11-28Assert an MIT copyright on sis_drm.h, since one was lacking and I createdEric Anholt
2005-11-08Fix FreeBSD DRM for latest MGA changes to agp support, which cleans thingsEric Anholt
2005-11-03Converts the remaining drm_agp_foo functions to be a drm_agp_foo andIan Romanick
2005-10-20dma access also needs some workDave Airlie
2005-10-20the old init path needs to set WAGP_ENABLE by defaultDave Airlie
2005-10-14Doig a full clean up from mga_do_dma_bootstrap whenIan Romanick
2005-10-14Fixed a cut-and-paste bug that could cause an oops in mga_do_cleanup_dmaIan Romanick
2005-08-26- Don't try to allocate mappings of less than a PAGE_SIZE in MGA DMA code.Eric Anholt
2005-08-16add Egberts 32/64 bit patch (its in kernel already...)Dave Airlie
2005-08-05Rename the driver hooks in the DRM to something a little moreEric Anholt
2005-08-04Whitespace fixups.Eric Anholt
2005-08-04Fix the MGA driver on BSD by passing in the proper chipset flags to theEric Anholt
2005-06-28- Remove drm_initmap and replace its usage with drm_addmap. This reducesEric Anholt
2005-06-17fix up drm_alloc_agp to take a dev arg and not pass crappy agpgart aroundDave Airlie
2005-06-14Adds support for PCI cards to MGA DRMIan Romanick
2005-06-09Completely re-initialize DMA settingsIan Romanick
2005-06-03Move the deallocation of dev_private. Since dev_private is allocated whenIan Romanick
2005-05-21Change the MGA initialization and cleanup a bit. The dev_private structureIan Romanick
2005-02-01cleanup patch from Adrian Bunk <bunk@stusta.de>Dave Airlie
2004-09-30Lindent of core build. Drivers checked for no binary diffs. A few filesJon Smirl
2004-09-27First check in for DRM that splits core from personality modulesJon Smirl
2004-09-20remove HAVE_COUNTERSDave Airlie
2004-08-24Merged drmfntbl-0-0-2Dave Airlie
2004-08-23set pointers to NULL after freeing, remove some extra debuggingDave Airlie
2004-08-17Merged drmfntbl-0-0-1Dave Airlie
2004-07-25sync up with current 2.6 kernel bk tree - mostly __user annotationsDave Airlie
2003-12-16Don't ioremap the framebuffer area. The ioremapped area wasn't used byEric Anholt
2003-11-05- Tie the DRM to a specific device: setunique no longer succeeds when givenEric Anholt
2003-10-17- Move IRQ functions from drm_dma.h to new drm_irq.h and disentangle themEric Anholt
2003-05-16Support AGP bridges where the AGP aperture can't be accessed directly byMichel Daenzer
2003-04-26Ensure driver has been initialized (dev_private != NULL) before installingLeif Delgass
2003-04-21Check for NULL map before calling DRM(ioremapfree) on cleanup. Prevents anLeif Delgass
2003-03-28merged drm-filp-0-1-branchKeith Whitwell
2002-10-29updated e-mail addresses for Keith, Alan and JensJens Owen
2002-10-27s/udelay/DRM_UDELAY/Eric Anholt
2002-10-10Jonny Strom's mga_dma.c patchKeith Whitwell
2002-08-29standardize use of __FUNCTION__ (Linus)Keith Whitwell
2002-07-05merged bsd-3-0-0-branchAlan Hourihane
generated by cgit v1.2.3 (git 2.25.1) at 2024-09-18 05:42:02 +0000
ons * 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 NON-INFRINGEMENT. * IN NO EVENT SHALL TUNGSTEN GRAPHICS 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 "drmP.h" #include "drm.h" #include "i915_drm.h" #include "i915_drv.h" /* This memory manager is integrated into the global/local lru * mechanisms used by the clients. Specifically, it operates by * setting the 'in_use' fields of the global LRU to indicate whether * this region is privately allocated to a client. * * This does require the client to actually respect that field. * * Currently no effort is made to allocate 'private' memory in any * clever way - the LRU information isn't used to determine which * block to allocate, and the ring is drained prior to allocations -- * in other words allocation is expensive. */ static void mark_block(struct drm_device * dev, struct mem_block *p, int in_use) { struct drm_i915_private *dev_priv = dev->dev_private; struct drm_i915_sarea *sarea_priv = dev_priv->sarea_priv; struct drm_tex_region *list; unsigned shift, nr; unsigned start; unsigned end; unsigned i; int age; shift = dev_priv->tex_lru_log_granularity; nr = I915_NR_TEX_REGIONS; start = p->start >> shift; end = (p->start + p->size - 1) >> shift; age = ++sarea_priv->texAge; list = sarea_priv->texList; /* Mark the regions with the new flag and update their age. Move * them to head of list to preserve LRU semantics. */ for (i = start; i <= end; i++) { list[i].in_use = in_use; list[i].age = age; /* remove_from_list(i) */ list[(unsigned)list[i].next].prev = list[i].prev; list[(unsigned)list[i].prev].next = list[i].next; /* insert_at_head(list, i) */ list[i].prev = nr; list[i].next = list[nr].next; list[(unsigned)list[nr].next].prev = i; list[nr].next = i; } } /* Very simple allocator for agp memory, working on a static range * already mapped into each client's address space. */ static struct mem_block *split_block(struct mem_block *p, int start, int size, struct drm_file *file_priv) { /* Maybe cut off the start of an existing block */ if (start > p->start) { struct mem_block *newblock = drm_alloc(sizeof(*newblock), DRM_MEM_BUFLISTS); if (!newblock) goto out; newblock->start = start; newblock->size = p->size - (start - p->start); newblock->file_priv = NULL; newblock->next = p->next; newblock->prev = p; p->next->prev = newblock; p->next = newblock; p->size -= newblock->size; p = newblock; } /* Maybe cut off the end of an existing block */ if (size < p->size) { struct mem_block *newblock = drm_alloc(sizeof(*newblock), DRM_MEM_BUFLISTS); if (!newblock) goto out; newblock->start = start + size; newblock->size = p->size - size; newblock->file_priv = NULL; newblock->next = p->next; newblock->prev = p; p->next->prev = newblock; p->next = newblock; p->size = size; } out: /* Our block is in the middle */ p->file_priv = file_priv; return p; } static struct mem_block *alloc_block(struct mem_block *heap, int size, int align2, struct drm_file *file_priv) { struct mem_block *p; int mask = (1 << align2) - 1; for (p = heap->next; p != heap; p = p->next) { int start = (p->start + mask) & ~mask; if (p->file_priv == NULL && start + size <= p->start + p->size) return split_block(p, start, size, file_priv); } return NULL; } static struct mem_block *find_block(struct mem_block *heap, int start) { struct mem_block *p; for (p = heap->next; p != heap; p = p->next) if (p->start == start) return p; return NULL; } static void free_block(struct mem_block *p) { p->file_priv = NULL; /* Assumes a single contiguous range. Needs a special file_priv in * 'heap' to stop it being subsumed. */ if (p->next->file_priv == NULL) { struct mem_block *q = p->next; p->size += q->size; p->next = q->next; p->next->prev = p; drm_free(q, sizeof(*q), DRM_MEM_BUFLISTS); } if (p->prev->file_priv == NULL) { struct mem_block *q = p->prev; q->size += p->size; q->next = p->next; q->next->prev = q; drm_free(p, sizeof(*q), DRM_MEM_BUFLISTS); } } /* Initialize. How to check for an uninitialized heap? */ static int init_heap(struct mem_block **heap, int start, int size) { struct mem_block *blocks = drm_alloc(sizeof(*blocks), DRM_MEM_BUFLISTS); if (!blocks) return -ENOMEM; *heap = drm_alloc(sizeof(**heap), DRM_MEM_BUFLISTS); if (!*heap) { drm_free(blocks, sizeof(*blocks), DRM_MEM_BUFLISTS); return -ENOMEM; } blocks->start = start; blocks->size = size; blocks->file_priv = NULL; blocks->next = blocks->prev = *heap; memset(*heap, 0, sizeof(**heap)); (*heap)->file_priv = (struct drm_file *) - 1; (*heap)->next = (*heap)->prev = blocks; return 0; } /* Free all blocks associated with the releasing file. */ void i915_mem_release(struct drm_device * dev, struct drm_file *file_priv, struct mem_block *heap) { struct mem_block *p; if (!heap || !heap->next) return; for (p = heap->next; p != heap; p = p->next) { if (p->file_priv == file_priv) { p->file_priv = NULL; mark_block(dev, p, 0); } } /* Assumes a single contiguous range. Needs a special file_priv in * 'heap' to stop it being subsumed. */ for (p = heap->next; p != heap; p = p->next) { while (p->file_priv == NULL && p->next->file_priv == NULL) { struct mem_block *q = p->next; p->size += q->size; p->next = q->next; p->next->prev = p; drm_free(q, sizeof(*q), DRM_MEM_BUFLISTS); } } } /* Shutdown. */ void i915_mem_takedown(struct mem_block **heap) { struct mem_block *p; if (!*heap) return; for (p = (*heap)->next; p != *heap;) { struct mem_block *q = p; p = p->next; drm_free(q, sizeof(*q), DRM_MEM_BUFLISTS); } drm_free(*heap, sizeof(**heap), DRM_MEM_BUFLISTS); *heap = NULL; } static struct mem_block **get_heap(struct drm_i915_private * dev_priv, int region) { switch (region) { case I915_MEM_REGION_AGP: return &dev_priv->agp_heap; default: return NULL; } } /* IOCTL HANDLERS */ int i915_mem_alloc(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_i915_private *dev_priv = dev->dev_private; struct drm_i915_mem_alloc *alloc = data; struct mem_block *block, **heap; if (!dev_priv) { DRM_ERROR("%s called with no initialization\n", __FUNCTION__); return -EINVAL; } heap = get_heap(dev_priv, alloc->region); if (!heap || !*heap) return -EFAULT; /* Make things easier on ourselves: all allocations at least * 4k aligned. */ if (alloc->alignment < 12) alloc->alignment = 12; block = alloc_block(*heap, alloc->size, alloc->alignment, file_priv); if (!block) return -ENOMEM; mark_block(dev, block, 1); if (DRM_COPY_TO_USER(alloc->region_offset, &block->start, sizeof(int))) { DRM_ERROR("copy_to_user\n"); return -EFAULT; } return 0; } int i915_mem_free(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_i915_private *dev_priv = dev->dev_private; struct drm_i915_mem_free *memfree = data; struct mem_block *block, **heap; if (!dev_priv) { DRM_ERROR("%s called with no initialization\n", __FUNCTION__); return -EINVAL; } heap = get_heap(dev_priv, memfree->region); if (!heap || !*heap) return -EFAULT; block = find_block(*heap, memfree->region_offset); if (!block) return -EFAULT; if (block->file_priv != file_priv) return -EPERM; mark_block(dev, block, 0); free_block(block); return 0; } int i915_mem_init_heap(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_i915_private *dev_priv = dev->dev_private; struct drm_i915_mem_init_heap *initheap = data; struct mem_block **heap; if (!dev_priv) { DRM_ERROR("%s called with no initialization\n", __FUNCTION__); return -EINVAL; } heap = get_heap(dev_priv, initheap->region); if (!heap) return -EFAULT; if (*heap) { DRM_ERROR("heap already initialized?"); return -EFAULT; } return init_heap(heap, initheap->start, initheap->size); } int i915_mem_destroy_heap( struct drm_device *dev, void *data, struct drm_file *file_priv ) { struct drm_i915_private *dev_priv = dev->dev_private; struct drm_i915_mem_destroy_heap *destroyheap = data; struct mem_block **heap; if ( !dev_priv ) { DRM_ERROR( "%s called with no initialization\n", __FUNCTION__ ); return -EINVAL; } heap = get_heap( dev_priv, destroyheap->region ); if (!heap) { DRM_ERROR("get_heap failed"); return -EFAULT; } if (!*heap) { DRM_ERROR("heap not initialized?"); return -EFAULT; } i915_mem_takedown( heap ); return 0; }
generated by cgit v1.2.3 (git 2.25.1) at 2024-09-18 05:42:01 +0000