diff options
Diffstat (limited to 'sys/dev/drm/drm_bufs.c')
| -rw-r--r-- | sys/dev/drm/drm_bufs.c | 1034 |
1 files changed, 1034 insertions, 0 deletions
diff --git a/sys/dev/drm/drm_bufs.c b/sys/dev/drm/drm_bufs.c new file mode 100644 index 0000000..9a25c2c --- /dev/null +++ b/sys/dev/drm/drm_bufs.c @@ -0,0 +1,1034 @@ +/* drm_bufs.h -- Generic buffer template -*- linux-c -*- + * Created: Thu Nov 23 03:10:50 2000 by gareth@valinux.com + */ +/*- + * Copyright 1999, 2000 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. + * + * Authors: + * Rickard E. (Rik) Faith <faith@valinux.com> + * Gareth Hughes <gareth@valinux.com> + * + * $FreeBSD$ + */ + +#include "dev/drm/drmP.h" + +/* + * Compute order. Can be made faster. + */ +int drm_order(unsigned long size) +{ + int order; + unsigned long tmp; + + for ( order = 0, tmp = size ; tmp >>= 1 ; ++order ); + + if ( size & ~(1 << order) ) + ++order; + + return order; +} + +unsigned long drm_get_resource_start(drm_device_t *dev, unsigned int resource) +{ + struct resource *bsr; + unsigned long offset; + + resource = resource * 4 + 0x10; + + bsr = bus_alloc_resource_any(dev->device, SYS_RES_MEMORY, &resource, + RF_ACTIVE | RF_SHAREABLE); + if (bsr == NULL) { + DRM_ERROR("Couldn't find resource 0x%x\n", resource); + return 0; + } + + offset = rman_get_start(bsr); + + bus_release_resource(dev->device, SYS_RES_MEMORY, resource, bsr); + + return offset; +} + +unsigned long drm_get_resource_len(drm_device_t *dev, unsigned int resource) +{ + struct resource *bsr; + unsigned long len; + + resource = resource * 4 + 0x10; + + bsr = bus_alloc_resource_any(dev->device, SYS_RES_MEMORY, &resource, + RF_ACTIVE | RF_SHAREABLE); + if (bsr == NULL) { + DRM_ERROR("Couldn't find resource 0x%x\n", resource); + return ENOMEM; + } + + len = rman_get_size(bsr); + + bus_release_resource(dev->device, SYS_RES_MEMORY, resource, bsr); + + return len; +} + +int drm_initmap(drm_device_t *dev, unsigned long start, unsigned long len, + unsigned int resource, int type, int flags) +{ + drm_local_map_t *map; + struct resource *bsr; + + if (type != _DRM_REGISTERS && type != _DRM_FRAME_BUFFER) + return EINVAL; + if (len == 0) + return EINVAL; + + map = malloc(sizeof(*map), M_DRM, M_ZERO | M_NOWAIT); + if (map == NULL) + return ENOMEM; + + map->rid = resource * 4 + 0x10; + bsr = bus_alloc_resource_any(dev->device, SYS_RES_MEMORY, &map->rid, + RF_ACTIVE | RF_SHAREABLE); + if (bsr == NULL) { + DRM_ERROR("Couldn't allocate %s resource\n", + ((type == _DRM_REGISTERS) ? "mmio" : "framebuffer")); + free(map, M_DRM); + return ENOMEM; + } + + map->kernel_owned = 1; + map->type = type; + map->flags = flags; + map->bsr = bsr; + map->bst = rman_get_bustag(bsr); + map->bsh = rman_get_bushandle(bsr); + map->offset = start; + map->size = len; + + if (type == _DRM_REGISTERS) + map->handle = rman_get_virtual(bsr); + + DRM_DEBUG("initmap %d,0x%x@0x%lx/0x%lx\n", map->type, map->flags, + map->offset, map->size); + + if (map->flags & _DRM_WRITE_COMBINING) { + int err; + + err = drm_mtrr_add(map->offset, map->size, DRM_MTRR_WC); + if (err == 0) + map->mtrr = 1; + } + + DRM_LOCK(); + TAILQ_INSERT_TAIL(&dev->maplist, map, link); + DRM_UNLOCK(); + + return 0; +} + +int drm_addmap(DRM_IOCTL_ARGS) +{ + DRM_DEVICE; + drm_map_t request; + drm_local_map_t *map; + dma_addr_t bus_addr; + + if (!(dev->flags & (FREAD|FWRITE))) + return DRM_ERR(EACCES); /* Require read/write */ + + DRM_COPY_FROM_USER_IOCTL( request, (drm_map_t *)data, sizeof(drm_map_t) ); + + /* Only allow shared memory to be removable since we only keep enough + * book keeping information about shared memory to allow for removal + * when processes fork. + */ + if ((request.flags & _DRM_REMOVABLE) && request.type != _DRM_SHM) + return EINVAL; + if ((request.offset & PAGE_MASK) || (request.size & PAGE_MASK)) + return EINVAL; + if (request.offset + request.size < request.offset) + return EINVAL; + + DRM_DEBUG("offset = 0x%08lx, size = 0x%08lx, type = %d\n", + request.offset, request.size, request.type); + + /* Check if this is just another version of a kernel-allocated map, and + * just hand that back if so. + */ + if (request.type == _DRM_REGISTERS || request.type == _DRM_FRAME_BUFFER) + { + DRM_LOCK(); + TAILQ_FOREACH(map, &dev->maplist, link) { + if (map->kernel_owned && map->type == request.type && + map->offset == request.offset) { + /* XXX: this size setting is questionable. */ + map->size = request.size; + DRM_DEBUG("Found kernel map %d\n", request.type); + goto done; + } + } + DRM_UNLOCK(); + } + + /* Allocate a new map structure, fill it in, and do any type-specific + * initialization necessary. + */ + map = malloc(sizeof(*map), M_DRM, M_ZERO | M_NOWAIT); + if ( !map ) + return DRM_ERR(ENOMEM); + + map->offset = request.offset; + map->size = request.size; + map->type = request.type; + map->flags = request.flags; + + switch ( map->type ) { + case _DRM_REGISTERS: + drm_ioremap(dev, map); + if (!(map->flags & _DRM_WRITE_COMBINING)) + break; + /* FALLTHROUGH */ + case _DRM_FRAME_BUFFER: + if (drm_mtrr_add(map->offset, map->size, DRM_MTRR_WC) == 0) + map->mtrr = 1; + break; + case _DRM_SHM: + map->handle = malloc(map->size, M_DRM, M_NOWAIT); + DRM_DEBUG( "%lu %d %p\n", + map->size, drm_order(map->size), map->handle ); + if ( !map->handle ) { + free(map, M_DRM); + return DRM_ERR(ENOMEM); + } + map->offset = (unsigned long)map->handle; + if ( map->flags & _DRM_CONTAINS_LOCK ) { + /* Prevent a 2nd X Server from creating a 2nd lock */ + DRM_LOCK(); + if (dev->lock.hw_lock != NULL) { + DRM_UNLOCK(); + free(map->handle, M_DRM); + free(map, M_DRM); + return DRM_ERR(EBUSY); + } + dev->lock.hw_lock = map->handle; /* Pointer to lock */ + DRM_UNLOCK(); + } + break; + case _DRM_AGP: + map->offset += dev->agp->base; + map->mtrr = dev->agp->mtrr; /* for getmap */ + break; + case _DRM_SCATTER_GATHER: + if (!dev->sg) { + free(map, M_DRM); + return DRM_ERR(EINVAL); + } + map->offset = map->offset + dev->sg->handle; + break; + case _DRM_CONSISTENT: + map->handle = drm_pci_alloc(dev, map->size, map->size, + 0xfffffffful, &bus_addr); + if (map->handle == NULL) { + free(map, M_DRM); + return ENOMEM; + } + map->offset = (unsigned long)bus_addr; + break; + default: + free(map, M_DRM); + return DRM_ERR(EINVAL); + } + + DRM_LOCK(); + TAILQ_INSERT_TAIL(&dev->maplist, map, link); + +done: + /* Jumped to, with lock held, when a kernel map is found. */ + request.offset = map->offset; + request.size = map->size; + request.type = map->type; + request.flags = map->flags; + request.mtrr = map->mtrr; + request.handle = map->handle; + DRM_UNLOCK(); + + DRM_DEBUG("Added map %d 0x%lx/0x%lx\n", request.type, request.offset, request.size); + + if ( request.type != _DRM_SHM ) { + request.handle = (void *)request.offset; + } + + DRM_COPY_TO_USER_IOCTL( (drm_map_t *)data, request, sizeof(drm_map_t) ); + + return 0; +} + +void drm_remove_map(drm_device_t *dev, drm_local_map_t *map) +{ + DRM_SPINLOCK_ASSERT(&dev->dev_lock); + + TAILQ_REMOVE(&dev->maplist, map, link); + + switch (map->type) { + case _DRM_REGISTERS: + if (map->bsr == NULL) + drm_ioremapfree(map); + /* FALLTHROUGH */ + case _DRM_FRAME_BUFFER: + if (map->mtrr) { + int __unused retcode; + + retcode = drm_mtrr_del(map->offset, map->size, + DRM_MTRR_WC); + DRM_DEBUG("mtrr_del = %d\n", retcode); + } + break; + case _DRM_SHM: + free(map->handle, M_DRM); + break; + case _DRM_AGP: + case _DRM_SCATTER_GATHER: + break; + case _DRM_CONSISTENT: + drm_pci_free(dev, map->size, map->handle, map->offset); + break; + } + + if (map->bsr != NULL) { + bus_release_resource(dev->device, SYS_RES_MEMORY, map->rid, + map->bsr); + } + + free(map, M_DRM); +} + +/* Remove a map private from list and deallocate resources if the mapping + * isn't in use. + */ + +int drm_rmmap(DRM_IOCTL_ARGS) +{ + DRM_DEVICE; + drm_local_map_t *map; + drm_map_t request; + + DRM_COPY_FROM_USER_IOCTL( request, (drm_map_t *)data, sizeof(request) ); + + DRM_LOCK(); + TAILQ_FOREACH(map, &dev->maplist, link) { + if (map->handle == request.handle && + map->flags & _DRM_REMOVABLE) + break; + } + + /* No match found. */ + if (map == NULL) { + DRM_UNLOCK(); + return DRM_ERR(EINVAL); + } + + drm_remove_map(dev, map); + + DRM_UNLOCK(); + + return 0; +} + + +static void drm_cleanup_buf_error(drm_device_t *dev, drm_buf_entry_t *entry) +{ + int i; + + if (entry->seg_count) { + for (i = 0; i < entry->seg_count; i++) { + drm_pci_free(dev, entry->buf_size, + (void *)entry->seglist[i], + entry->seglist_bus[i]); + } + free(entry->seglist, M_DRM); + free(entry->seglist_bus, M_DRM); + + entry->seg_count = 0; + } + + if (entry->buf_count) { + for (i = 0; i < entry->buf_count; i++) { + free(entry->buflist[i].dev_private, M_DRM); + } + free(entry->buflist, M_DRM); + + entry->buf_count = 0; + } +} + +static int drm_addbufs_agp(drm_device_t *dev, drm_buf_desc_t *request) +{ + drm_device_dma_t *dma = dev->dma; + drm_buf_entry_t *entry; + drm_buf_t *buf; + unsigned long offset; + unsigned long agp_offset; + int count; + int order; + int size; + int alignment; + int page_order; + int total; + int byte_count; + int i; + drm_buf_t **temp_buflist; + + count = request->count; + order = drm_order(request->size); + size = 1 << order; + + alignment = (request->flags & _DRM_PAGE_ALIGN) + ? round_page(size) : size; + page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; + total = PAGE_SIZE << page_order; + + byte_count = 0; + agp_offset = dev->agp->base + request->agp_start; + + DRM_DEBUG( "count: %d\n", count ); + DRM_DEBUG( "order: %d\n", order ); + DRM_DEBUG( "size: %d\n", size ); + DRM_DEBUG( "agp_offset: 0x%lx\n", agp_offset ); + DRM_DEBUG( "alignment: %d\n", alignment ); + DRM_DEBUG( "page_order: %d\n", page_order ); + DRM_DEBUG( "total: %d\n", total ); + + entry = &dma->bufs[order]; + + entry->buflist = malloc(count * sizeof(*entry->buflist), M_DRM, + M_NOWAIT | M_ZERO); + if ( !entry->buflist ) { + return DRM_ERR(ENOMEM); + } + + entry->buf_size = size; + entry->page_order = page_order; + + offset = 0; + + while ( entry->buf_count < count ) { + buf = &entry->buflist[entry->buf_count]; + buf->idx = dma->buf_count + entry->buf_count; + buf->total = alignment; + buf->order = order; + buf->used = 0; + + buf->offset = (dma->byte_count + offset); + buf->bus_address = agp_offset + offset; + buf->address = (void *)(agp_offset + offset); + buf->next = NULL; + buf->pending = 0; + buf->filp = NULL; + + buf->dev_priv_size = dev->dev_priv_size; + buf->dev_private = malloc(buf->dev_priv_size, M_DRM, + M_NOWAIT | M_ZERO); + if (buf->dev_private == NULL) { + /* Set count correctly so we free the proper amount. */ + entry->buf_count = count; + drm_cleanup_buf_error(dev, entry); + return DRM_ERR(ENOMEM); + } + + offset += alignment; + entry->buf_count++; + byte_count += PAGE_SIZE << page_order; + } + + DRM_DEBUG( "byte_count: %d\n", byte_count ); + + temp_buflist = realloc(dma->buflist, + (dma->buf_count + entry->buf_count) * sizeof(*dma->buflist), M_DRM, + M_NOWAIT); + if (temp_buflist == NULL) { + /* Free the entry because it isn't valid */ + drm_cleanup_buf_error(dev, entry); + return DRM_ERR(ENOMEM); + } + dma->buflist = temp_buflist; + + for ( i = 0 ; i < entry->buf_count ; i++ ) { + dma->buflist[i + dma->buf_count] = &entry->buflist[i]; + } + + dma->buf_count += entry->buf_count; + dma->byte_count += byte_count; + + DRM_DEBUG( "dma->buf_count : %d\n", dma->buf_count ); + DRM_DEBUG( "entry->buf_count : %d\n", entry->buf_count ); + + request->count = entry->buf_count; + request->size = size; + + dma->flags = _DRM_DMA_USE_AGP; + + return 0; +} + +static int drm_addbufs_pci(drm_device_t *dev, drm_buf_desc_t *request) +{ + drm_device_dma_t *dma = dev->dma; + int count; + int order; + int size; + int total; + int page_order; + drm_buf_entry_t *entry; + vm_offset_t vaddr; + drm_buf_t *buf; + int alignment; + unsigned long offset; + int i; + int byte_count; + int page_count; + unsigned long *temp_pagelist; + drm_buf_t **temp_buflist; + dma_addr_t bus_addr; + + count = request->count; + order = drm_order(request->size); + size = 1 << order; + + DRM_DEBUG( "count=%d, size=%d (%d), order=%d\n", + request->count, request->size, size, order ); + + alignment = (request->flags & _DRM_PAGE_ALIGN) + ? round_page(size) : size; + page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; + total = PAGE_SIZE << page_order; + + entry = &dma->bufs[order]; + + entry->buflist = malloc(count * sizeof(*entry->buflist), M_DRM, + M_NOWAIT | M_ZERO); + entry->seglist = malloc(count * sizeof(*entry->seglist), M_DRM, + M_NOWAIT | M_ZERO); + entry->seglist_bus = malloc(count * sizeof(*entry->seglist_bus), M_DRM, + M_NOWAIT | M_ZERO); + + /* Keep the original pagelist until we know all the allocations + * have succeeded + */ + temp_pagelist = malloc((dma->page_count + (count << page_order)) * + sizeof(*dma->pagelist), M_DRM, M_NOWAIT); + + if (entry->buflist == NULL || entry->seglist == NULL || + entry->seglist_bus == NULL || temp_pagelist == NULL) { + free(entry->buflist, M_DRM); + free(entry->seglist, M_DRM); + free(entry->seglist_bus, M_DRM); + return DRM_ERR(ENOMEM); + } + + memcpy(temp_pagelist, dma->pagelist, dma->page_count * + sizeof(*dma->pagelist)); + + DRM_DEBUG( "pagelist: %d entries\n", + dma->page_count + (count << page_order) ); + + entry->buf_size = size; + entry->page_order = page_order; + byte_count = 0; + page_count = 0; + + while ( entry->buf_count < count ) { + vaddr = (vm_offset_t)drm_pci_alloc(dev, size, alignment, + 0xfffffffful, &bus_addr); + if (vaddr == 0) { + /* Set count correctly so we free the proper amount. */ + entry->buf_count = count; + entry->seg_count = count; + drm_cleanup_buf_error(dev, entry); + free(temp_pagelist, M_DRM); + return DRM_ERR(ENOMEM); + } + + entry->seglist_bus[entry->seg_count] = bus_addr; + entry->seglist[entry->seg_count++] = vaddr; + for ( i = 0 ; i < (1 << page_order) ; i++ ) { + DRM_DEBUG( "page %d @ 0x%08lx\n", + dma->page_count + page_count, + (long)vaddr + PAGE_SIZE * i ); + temp_pagelist[dma->page_count + page_count++] = + vaddr + PAGE_SIZE * i; + } + for ( offset = 0 ; + offset + size <= total && entry->buf_count < count ; + offset += alignment, ++entry->buf_count ) { + buf = &entry->buflist[entry->buf_count]; + buf->idx = dma->buf_count + entry->buf_count; + buf->total = alignment; + buf->order = order; + buf->used = 0; + buf->offset = (dma->byte_count + byte_count + offset); + buf->address = (void *)(vaddr + offset); + buf->bus_address = bus_addr + offset; + buf->next = NULL; + buf->pending = 0; + buf->filp = NULL; + + buf->dev_priv_size = dev->dev_priv_size; + buf->dev_private = malloc(buf->dev_priv_size, M_DRM, + M_NOWAIT | M_ZERO); + if (buf->dev_private == NULL) { + /* Set count correctly so we free the proper amount. */ + entry->buf_count = count; + entry->seg_count = count; + drm_cleanup_buf_error(dev, entry); + free(temp_pagelist, M_DRM); + return DRM_ERR(ENOMEM); + } + + DRM_DEBUG( "buffer %d @ %p\n", + entry->buf_count, buf->address ); + } + byte_count += PAGE_SIZE << page_order; + } + + temp_buflist = realloc(dma->buflist, + (dma->buf_count + entry->buf_count) * sizeof(*dma->buflist), M_DRM, + M_NOWAIT); + if (temp_buflist == NULL) { + /* Free the entry because it isn't valid */ + drm_cleanup_buf_error(dev, entry); + free(temp_pagelist, M_DRM); + return DRM_ERR(ENOMEM); + } + dma->buflist = temp_buflist; + + for ( i = 0 ; i < entry->buf_count ; i++ ) { + dma->buflist[i + dma->buf_count] = &entry->buflist[i]; + } + + /* No allocations failed, so now we can replace the orginal pagelist + * with the new one. + */ + free(dma->pagelist, M_DRM); + dma->pagelist = temp_pagelist; + + dma->buf_count += entry->buf_count; + dma->seg_count += entry->seg_count; + dma->page_count += entry->seg_count << page_order; + dma->byte_count += PAGE_SIZE * (entry->seg_count << page_order); + + request->count = entry->buf_count; + request->size = size; + + return 0; + +} + +static int drm_addbufs_sg(drm_device_t *dev, drm_buf_desc_t *request) +{ + drm_device_dma_t *dma = dev->dma; + drm_buf_entry_t *entry; + drm_buf_t *buf; + unsigned long offset; + unsigned long agp_offset; + int count; + int order; + int size; + int alignment; + int page_order; + int total; + int byte_count; + int i; + drm_buf_t **temp_buflist; + + count = request->count; + order = drm_order(request->size); + size = 1 << order; + + alignment = (request->flags & _DRM_PAGE_ALIGN) + ? round_page(size) : size; + page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; + total = PAGE_SIZE << page_order; + + byte_count = 0; + agp_offset = request->agp_start; + + DRM_DEBUG( "count: %d\n", count ); + DRM_DEBUG( "order: %d\n", order ); + DRM_DEBUG( "size: %d\n", size ); + DRM_DEBUG( "agp_offset: %ld\n", agp_offset ); + DRM_DEBUG( "alignment: %d\n", alignment ); + DRM_DEBUG( "page_order: %d\n", page_order ); + DRM_DEBUG( "total: %d\n", total ); + + entry = &dma->bufs[order]; + + entry->buflist = malloc(count * sizeof(*entry->buflist), M_DRM, + M_NOWAIT | M_ZERO); + if (entry->buflist == NULL) + return DRM_ERR(ENOMEM); + + entry->buf_size = size; + entry->page_order = page_order; + + offset = 0; + + while ( entry->buf_count < count ) { + buf = &entry->buflist[entry->buf_count]; + buf->idx = dma->buf_count + entry->buf_count; + buf->total = alignment; + buf->order = order; + buf->used = 0; + + buf->offset = (dma->byte_count + offset); + buf->bus_address = agp_offset + offset; + buf->address = (void *)(agp_offset + offset + dev->sg->handle); + buf->next = NULL; + buf->pending = 0; + buf->filp = NULL; + + buf->dev_priv_size = dev->dev_priv_size; + buf->dev_private = malloc(buf->dev_priv_size, M_DRM, + M_NOWAIT | M_ZERO); + if (buf->dev_private == NULL) { + /* Set count correctly so we free the proper amount. */ + entry->buf_count = count; + drm_cleanup_buf_error(dev, entry); + return DRM_ERR(ENOMEM); + } + + DRM_DEBUG( "buffer %d @ %p\n", + entry->buf_count, buf->address ); + + offset += alignment; + entry->buf_count++; + byte_count += PAGE_SIZE << page_order; + } + + DRM_DEBUG( "byte_count: %d\n", byte_count ); + + temp_buflist = realloc(dma->buflist, + (dma->buf_count + entry->buf_count) * sizeof(*dma->buflist), M_DRM, + M_NOWAIT); + if (temp_buflist == NULL) { + /* Free the entry because it isn't valid */ + drm_cleanup_buf_error(dev, entry); + return DRM_ERR(ENOMEM); + } + dma->buflist = temp_buflist; + + for ( i = 0 ; i < entry->buf_count ; i++ ) { + dma->buflist[i + dma->buf_count] = &entry->buflist[i]; + } + + dma->buf_count += entry->buf_count; + dma->byte_count += byte_count; + + DRM_DEBUG( "dma->buf_count : %d\n", dma->buf_count ); + DRM_DEBUG( "entry->buf_count : %d\n", entry->buf_count ); + + request->count = entry->buf_count; + request->size = size; + + dma->flags = _DRM_DMA_USE_SG; + + return 0; +} + +int drm_addbufs(DRM_IOCTL_ARGS) +{ + DRM_DEVICE; + drm_buf_desc_t request; + int err; + int order; + + DRM_COPY_FROM_USER_IOCTL( request, (drm_buf_desc_t *)data, sizeof(request) ); + + if (request.count < 0 || request.count > 4096) + return DRM_ERR(EINVAL); + + order = drm_order(request.size); + if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) + return DRM_ERR(EINVAL); + + DRM_SPINLOCK(&dev->dma_lock); + /* No more allocations after first buffer-using ioctl. */ + if (dev->buf_use != 0) { + DRM_SPINUNLOCK(&dev->dma_lock); + return DRM_ERR(EBUSY); + } + /* No more than one allocation per order */ + if (dev->dma->bufs[order].buf_count != 0) { + DRM_SPINUNLOCK(&dev->dma_lock); + return DRM_ERR(ENOMEM); + } + + if ( request.flags & _DRM_AGP_BUFFER ) + err = drm_addbufs_agp(dev, &request); + else + if ( request.flags & _DRM_SG_BUFFER ) + err = drm_addbufs_sg(dev, &request); + else + err = drm_addbufs_pci(dev, &request); + DRM_SPINUNLOCK(&dev->dma_lock); + + DRM_COPY_TO_USER_IOCTL((drm_buf_desc_t *)data, request, sizeof(request)); + + return err; +} + +int drm_infobufs(DRM_IOCTL_ARGS) +{ + DRM_DEVICE; + drm_device_dma_t *dma = dev->dma; + drm_buf_info_t request; + int i; + int count; + int retcode = 0; + + DRM_COPY_FROM_USER_IOCTL( request, (drm_buf_info_t *)data, sizeof(request) ); + + DRM_SPINLOCK(&dev->dma_lock); + ++dev->buf_use; /* Can't allocate more after this call */ + DRM_SPINUNLOCK(&dev->dma_lock); + + for ( i = 0, count = 0 ; i < DRM_MAX_ORDER + 1 ; i++ ) { + if ( dma->bufs[i].buf_count ) ++count; + } + + DRM_DEBUG( "count = %d\n", count ); + + if ( request.count >= count ) { + for ( i = 0, count = 0 ; i < DRM_MAX_ORDER + 1 ; i++ ) { + if ( dma->bufs[i].buf_count ) { + drm_buf_desc_t from; + + from.count = dma->bufs[i].buf_count; + from.size = dma->bufs[i].buf_size; + from.low_mark = dma->bufs[i].freelist.low_mark; + from.high_mark = dma->bufs[i].freelist.high_mark; + + if (DRM_COPY_TO_USER(&request.list[count], &from, + sizeof(drm_buf_desc_t)) != 0) { + retcode = DRM_ERR(EFAULT); + break; + } + + DRM_DEBUG( "%d %d %d %d %d\n", + i, + dma->bufs[i].buf_count, + dma->bufs[i].buf_size, + dma->bufs[i].freelist.low_mark, + dma->bufs[i].freelist.high_mark ); + ++count; + } + } + } + request.count = count; + + DRM_COPY_TO_USER_IOCTL( (drm_buf_info_t *)data, request, sizeof(request) ); + + return retcode; +} + +int drm_markbufs(DRM_IOCTL_ARGS) +{ + DRM_DEVICE; + drm_device_dma_t *dma = dev->dma; + drm_buf_desc_t request; + int order; + + DRM_COPY_FROM_USER_IOCTL( request, (drm_buf_desc_t *)data, sizeof(request) ); + + DRM_DEBUG( "%d, %d, %d\n", + request.size, request.low_mark, request.high_mark ); + + + order = drm_order(request.size); + if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER || + request.low_mark < 0 || request.high_mark < 0) { + return DRM_ERR(EINVAL); + } + + DRM_SPINLOCK(&dev->dma_lock); + if (request.low_mark > dma->bufs[order].buf_count || + request.high_mark > dma->bufs[order].buf_count) { + return DRM_ERR(EINVAL); + } + + dma->bufs[order].freelist.low_mark = request.low_mark; + dma->bufs[order].freelist.high_mark = request.high_mark; + DRM_SPINUNLOCK(&dev->dma_lock); + + return 0; +} + +int drm_freebufs(DRM_IOCTL_ARGS) +{ + DRM_DEVICE; + drm_device_dma_t *dma = dev->dma; + drm_buf_free_t request; + int i; + int idx; + drm_buf_t *buf; + int retcode = 0; + + DRM_COPY_FROM_USER_IOCTL( request, (drm_buf_free_t *)data, sizeof(request) ); + + DRM_DEBUG( "%d\n", request.count ); + + DRM_SPINLOCK(&dev->dma_lock); + for ( i = 0 ; i < request.count ; i++ ) { + if (DRM_COPY_FROM_USER(&idx, &request.list[i], sizeof(idx))) { + retcode = DRM_ERR(EFAULT); + break; + } + if ( idx < 0 || idx >= dma->buf_count ) { + DRM_ERROR( "Index %d (of %d max)\n", + idx, dma->buf_count - 1 ); + retcode = DRM_ERR(EINVAL); + break; + } + buf = dma->buflist[idx]; + if ( buf->filp != filp ) { + DRM_ERROR("Process %d freeing buffer not owned\n", + DRM_CURRENTPID); + retcode = DRM_ERR(EINVAL); + break; + } + drm_free_buffer(dev, buf); + } + DRM_SPINUNLOCK(&dev->dma_lock); + + return retcode; +} + +int drm_mapbufs(DRM_IOCTL_ARGS) +{ + DRM_DEVICE; + drm_device_dma_t *dma = dev->dma; + int retcode = 0; + const int zero = 0; + vm_offset_t address; + struct vmspace *vms; +#ifdef __FreeBSD__ + vm_ooffset_t foff; + vm_size_t size; + vm_offset_t vaddr; +#elif defined(__NetBSD__) || defined(__OpenBSD__) + struct vnode *vn; + vm_size_t size; + vaddr_t vaddr; +#endif /* __NetBSD__ || __OpenBSD__ */ + + drm_buf_map_t request; + int i; + + DRM_COPY_FROM_USER_IOCTL( request, (drm_buf_map_t *)data, sizeof(request) ); + +#if defined(__NetBSD__) || defined(__OpenBSD__) + if (!vfinddev(kdev, VCHR, &vn)) + return 0; /* FIXME: Shouldn't this be EINVAL or something? */ +#endif /* __NetBSD__ || __OpenBSD */ + +#if defined(__FreeBSD__) && __FreeBSD_version >= 500000 + vms = p->td_proc->p_vmspace; +#else + vms = p->p_vmspace; +#endif + + DRM_SPINLOCK(&dev->dma_lock); + dev->buf_use++; /* Can't allocate more after this call */ + DRM_SPINUNLOCK(&dev->dma_lock); + + if (request.count < dma->buf_count) + goto done; + + if ((dev->use_agp && (dma->flags & _DRM_DMA_USE_AGP)) || + (dev->use_sg && (dma->flags & _DRM_DMA_USE_SG))) { + drm_local_map_t *map = dev->agp_buffer_map; + + if (map == NULL) { + retcode = EINVAL; + goto done; + } + size = round_page(map->size); + foff = map->offset; + } else { + size = round_page(dma->byte_count), + foff = 0; + } + +#ifdef __FreeBSD__ + vaddr = round_page((vm_offset_t)vms->vm_daddr + MAXDSIZ); +#if __FreeBSD_version >= 600023 + retcode = vm_mmap(&vms->vm_map, &vaddr, size, PROT_READ | PROT_WRITE, + VM_PROT_ALL, MAP_SHARED, OBJT_DEVICE, kdev, foff ); +#else + retcode = vm_mmap(&vms->vm_map, &vaddr, size, PROT_READ | PROT_WRITE, + VM_PROT_ALL, MAP_SHARED, SLIST_FIRST(&kdev->si_hlist), foff ); +#endif +#elif defined(__NetBSD__) || defined(__OpenBSD__) + vaddr = round_page((vaddr_t)vms->vm_daddr + MAXDSIZ); + retcode = uvm_mmap(&vms->vm_map, &vaddr, size, + UVM_PROT_READ | UVM_PROT_WRITE, UVM_PROT_ALL, MAP_SHARED, + &vn->v_uobj, foff, p->p_rlimit[RLIMIT_MEMLOCK].rlim_cur); +#endif /* __NetBSD__ || __OpenBSD */ + if (retcode) + goto done; + + request.virtual = (void *)vaddr; + + for ( i = 0 ; i < dma->buf_count ; i++ ) { + if (DRM_COPY_TO_USER(&request.list[i].idx, + &dma->buflist[i]->idx, sizeof(request.list[0].idx))) { + retcode = EFAULT; + goto done; + } + if (DRM_COPY_TO_USER(&request.list[i].total, + &dma->buflist[i]->total, sizeof(request.list[0].total))) { + retcode = EFAULT; + goto done; + } + if (DRM_COPY_TO_USER(&request.list[i].used, &zero, + sizeof(zero))) { + retcode = EFAULT; + goto done; + } + address = vaddr + dma->buflist[i]->offset; /* *** */ + if (DRM_COPY_TO_USER(&request.list[i].address, &address, + sizeof(address))) { + retcode = EFAULT; + goto done; + } + } + + done: + request.count = dma->buf_count; + + DRM_DEBUG( "%d buffers, retcode = %d\n", request.count, retcode ); + + DRM_COPY_TO_USER_IOCTL((drm_buf_map_t *)data, request, sizeof(request)); + + return DRM_ERR(retcode); +} |
