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path: root/linux-core/drm_context.c
AgeCommit message (Expand)Author
2006-08-28fixup some of the comments in drm_context.cDave Airlie
2006-07-24switch drm to use Linux mutexes instead of semaphore.Dave Airlie
2006-02-18major realigment of DRM CVS with kernel code, makes integration much easierDave Airlie
2006-01-02sparse cleanupsDave Airlie
2005-12-04Fix from SuSE for issue with context creation failureDave Airlie
2005-08-16add Egberts 32/64 bit patch (its in kernel already...)Dave Airlie
2005-08-12Reverting the previous via security-fix commit, since the assumption ofThomas Hellstrom
2005-08-11Missing symbol export from previous via context check commit.Thomas Hellstrom
2005-08-10Security fix on via: Checking that the specified context belongs to theThomas Hellstrom
2005-08-05Fix bug in return to userspace resctx codeDave Airlie
2005-06-04misc cleanup patch from Adrian BunkDave Airlie
2004-10-18Update Doxygen configuration & comments.Jose Fonseca
2004-10-12Breakout heads into their own data structures.Jon Smirl
2004-10-10Rename fn_tbl to driver. Core driver now uses pci_driver name whichJon Smirl
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
2004-09-05merge back bunch of whitespace and misc changes from kernelDave Airlie
2004-09-02oops called ctor instead of dtor.. found this on the kernel mergeDave Airlie
2004-08-29remove hacky context thing that was gamma onlyDave Airlie
2004-08-27__NO_VERSION__ hasn't been needed since 2.3 days ditch it...Dave Airlie
2004-08-24Merged drmfntbl-0-0-2Dave Airlie
2004-08-17Merged drmfntbl-0-0-1Dave Airlie
2004-08-14Add a "dev" argument to DRIVER_CTX_[CD]TOR. This will be used in anEric Anholt
2004-07-20first set of __user annotations from kernel (Al Viro)Dave Airlie
2004-02-20drm_ctx_dtor.patch Submitted by: Erdi ChenKeith Whitwell
2003-05-27Merged DRM documentation.Jose Fonseca
2003-04-22remove unused variableAlan Hourihane
2003-04-22Move a chunk of gamma-specific code out of drm_dma.h. Remove unusedKeith Whitwell
2003-04-22remove unused dma histogram codeKeith Whitwell
2003-04-22Move a bunch of gamma-specific code into a gamma-specific file. Restore theKeith Whitwell
2003-04-22remove DRM read, poll and write_stringKeith Whitwell
2003-04-08Use list_entry() to get container struct from struct list_head pointers.Leif Delgass
2002-06-25gamma_alloc -> DRM(alloc)Alan Hourihane
2002-01-27First pass merge of XFree86 4.2.0 import.David Dawes
2001-09-25merge with 2.4.10 kernelAlan Hourihane
2001-08-13Sync with Linus 2.4.9-pre2 + make all nopage routines more alikeJeff Hartmann
2001-08-07Lots of DRM fixes: added new pieces of template code so the ffb driver canJeff Hartmann
2001-03-14Merged sarea-1-0-0Kevin E Martin
2001-02-16- Clean up the way customization of the templates is done.Gareth Hughes
2001-02-15Merge mga-1-0-0-branch into trunk.Gareth Hughes
generated by cgit v1.2.3 (git 2.25.1) at 2025-12-09 13:56:50 +0000
lass="hl com"> * 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 * PRECISION INSIGHT 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. * * Authors: * Keith Whitwell <keith@tungstengraphics.com> */ #include "drmP.h" #include "drm.h" #include "radeon_drm.h" #include "radeon_drv.h" /* Very simple allocator for GART 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_BUFS); 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_BUFS); 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; list_for_each(p, heap) { 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; list_for_each(p, heap) 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_BUFS); } 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_BUFS); } } /* 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_BUFS); if (!blocks) return -ENOMEM; *heap = drm_alloc(sizeof(**heap), DRM_MEM_BUFS); if (!*heap) { drm_free(blocks, sizeof(*blocks), DRM_MEM_BUFS); 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 radeon_mem_release(struct drm_file *file_priv, struct mem_block *heap) { struct mem_block *p; if (!heap || !heap->next) return; list_for_each(p, heap) { if (p->file_priv == file_priv) p->file_priv = NULL; } /* Assumes a single contiguous range. Needs a special file_priv in * 'heap' to stop it being subsumed. */ list_for_each(p, heap) { 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_DRIVER); } } } /* Shutdown. */ void radeon_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_DRIVER); } drm_free(*heap, sizeof(**heap), DRM_MEM_DRIVER); *heap = NULL; } /* IOCTL HANDLERS */ static struct mem_block **get_heap(drm_radeon_private_t * dev_priv, int region) { switch (region) { case RADEON_MEM_REGION_GART: return &dev_priv->gart_heap; case RADEON_MEM_REGION_FB: return &dev_priv->fb_heap; default: return NULL; } } int radeon_mem_alloc(struct drm_device *dev, void *data, struct drm_file *file_priv) { drm_radeon_private_t *dev_priv = dev->dev_private; drm_radeon_mem_alloc_t *alloc = data; struct mem_block *block, **heap; if (!dev_priv) { DRM_ERROR("called with no initialization\n"); 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; if (DRM_COPY_TO_USER(alloc->region_offset, &block->start, sizeof(int))) { DRM_ERROR("copy_to_user\n"); return -EFAULT; } return 0; } int radeon_mem_free(struct drm_device *dev, void *data, struct drm_file *file_priv) { drm_radeon_private_t *dev_priv = dev->dev_private; drm_radeon_mem_free_t *memfree = data; struct mem_block *block, **heap; if (!dev_priv) { DRM_ERROR("called with no initialization\n"); 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; free_block(block); return 0; } int radeon_mem_init_heap(struct drm_device *dev, void *data, struct drm_file *file_priv) { drm_radeon_private_t *dev_priv = dev->dev_private; drm_radeon_mem_init_heap_t *initheap = data; struct mem_block **heap; if (!dev_priv) { DRM_ERROR("called with no initialization\n"); return -EINVAL; } heap = get_heap(dev_priv, initheap->region); if (!heap) return -EFAULT; if (*heap) { DRM_DEBUG("heap already initialized?"); return -EFAULT; } return init_heap(heap, initheap->start, initheap->size); }
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