From 7b48f0022a24bc5f565ae64b450dda77dee616c1 Mon Sep 17 00:00:00 2001 From: Dave Airlie Date: Sat, 26 May 2007 04:26:24 +1000 Subject: drm: cleanup use of Linux list handling macros This makes the drms use of the list handling macros a lot cleaner and more along the lines of how they should be used. --- linux-core/drm_context.c | 12 +++++------- 1 file changed, 5 insertions(+), 7 deletions(-) (limited to 'linux-core/drm_context.c') diff --git a/linux-core/drm_context.c b/linux-core/drm_context.c index 49042272..3bfee127 100644 --- a/linux-core/drm_context.c +++ b/linux-core/drm_context.c @@ -233,7 +233,7 @@ int drm_getsareactx(struct inode *inode, struct file *filp, mutex_unlock(&dev->struct_mutex); request.handle = NULL; - list_for_each_entry(_entry, &dev->maplist->head,head) { + list_for_each_entry(_entry, &dev->maplist, head) { if (_entry->map == map) { request.handle = (void *)(unsigned long)_entry->user_token; @@ -268,15 +268,13 @@ int drm_setsareactx(struct inode *inode, struct file *filp, drm_ctx_priv_map_t request; drm_map_t *map = NULL; drm_map_list_t *r_list = NULL; - struct list_head *list; if (copy_from_user(&request, (drm_ctx_priv_map_t __user *) arg, sizeof(request))) return -EFAULT; mutex_lock(&dev->struct_mutex); - list_for_each(list, &dev->maplist->head) { - r_list = list_entry(list, drm_map_list_t, head); + list_for_each_entry(r_list, &dev->maplist, head) { if (r_list->map && r_list->user_token == (unsigned long) request.handle) goto found; @@ -449,7 +447,7 @@ int drm_addctx(struct inode *inode, struct file *filp, ctx_entry->tag = priv; mutex_lock(&dev->ctxlist_mutex); - list_add(&ctx_entry->head, &dev->ctxlist->head); + list_add(&ctx_entry->head, &dev->ctxlist); ++dev->ctx_count; mutex_unlock(&dev->ctxlist_mutex); @@ -575,10 +573,10 @@ int drm_rmctx(struct inode *inode, struct file *filp, } mutex_lock(&dev->ctxlist_mutex); - if (!list_empty(&dev->ctxlist->head)) { + if (!list_empty(&dev->ctxlist)) { drm_ctx_list_t *pos, *n; - list_for_each_entry_safe(pos, n, &dev->ctxlist->head, head) { + list_for_each_entry_safe(pos, n, &dev->ctxlist, head) { if (pos->handle == ctx.handle) { list_del(&pos->head); drm_free(pos, sizeof(*pos), DRM_MEM_CTXLIST); -- cgit v1.2.3 From 056c2f249a61ba7078bae3d767a59f2be4c6556e Mon Sep 17 00:00:00 2001 From: Dave Airlie Date: Sun, 27 May 2007 08:44:38 +1000 Subject: drm: move context handling code to use linux idr --- linux-core/drm_context.c | 142 ++++++++++++++++++----------------------------- 1 file changed, 53 insertions(+), 89 deletions(-) (limited to 'linux-core/drm_context.c') diff --git a/linux-core/drm_context.c b/linux-core/drm_context.c index 3bfee127..5cb79b14 100644 --- a/linux-core/drm_context.c +++ b/linux-core/drm_context.c @@ -58,20 +58,17 @@ */ void drm_ctxbitmap_free(drm_device_t * dev, int ctx_handle) { - if (ctx_handle < 0) - goto failed; - if (!dev->ctx_bitmap) - goto failed; - - if (ctx_handle < DRM_MAX_CTXBITMAP) { - mutex_lock(&dev->struct_mutex); - clear_bit(ctx_handle, dev->ctx_bitmap); - dev->context_sareas[ctx_handle] = NULL; - mutex_unlock(&dev->struct_mutex); - return; - } - failed: - DRM_ERROR("Attempt to free invalid context handle: %d\n", ctx_handle); + struct drm_ctx_sarea_list *ctx_sarea; + + mutex_lock(&dev->struct_mutex); + ctx_sarea = idr_find(&dev->ctx_idr, ctx_handle); + if (ctx_sarea) { + idr_remove(&dev->ctx_idr, ctx_handle); + list_del(&ctx_sarea->head); + drm_free(ctx_sarea, sizeof(struct drm_ctx_sarea_list), DRM_MEM_BUFS); + } else + DRM_ERROR("Attempt to free invalid context handle: %d\n", ctx_handle); + mutex_unlock(&dev->struct_mutex); return; } @@ -87,56 +84,32 @@ void drm_ctxbitmap_free(drm_device_t * dev, int ctx_handle) */ static int drm_ctxbitmap_next(drm_device_t * dev) { - int bit; + int new_id; + int ret; + struct drm_ctx_sarea_list *new_ctx; - if (!dev->ctx_bitmap) + new_ctx = drm_calloc(1, sizeof(struct drm_ctx_sarea_list), DRM_MEM_BUFS); + if (!new_ctx) return -1; +again: + if (idr_pre_get(&dev->ctx_idr, GFP_KERNEL) == 0) { + DRM_ERROR("Out of memory expanding drawable idr\n"); + drm_free(new_ctx, sizeof(struct drm_ctx_sarea_list), DRM_MEM_BUFS); + return -ENOMEM; + } mutex_lock(&dev->struct_mutex); - bit = find_first_zero_bit(dev->ctx_bitmap, DRM_MAX_CTXBITMAP); - if (bit < DRM_MAX_CTXBITMAP) { - set_bit(bit, dev->ctx_bitmap); - DRM_DEBUG("drm_ctxbitmap_next bit : %d\n", bit); - if ((bit + 1) > dev->max_context) { - dev->max_context = (bit + 1); - if (dev->context_sareas) { - drm_map_t **ctx_sareas; - - ctx_sareas = drm_realloc(dev->context_sareas, - (dev->max_context - - 1) * - sizeof(*dev-> - context_sareas), - dev->max_context * - sizeof(*dev-> - context_sareas), - DRM_MEM_MAPS); - if (!ctx_sareas) { - clear_bit(bit, dev->ctx_bitmap); - mutex_unlock(&dev->struct_mutex); - return -1; - } - dev->context_sareas = ctx_sareas; - dev->context_sareas[bit] = NULL; - } else { - /* max_context == 1 at this point */ - dev->context_sareas = - drm_alloc(dev->max_context * - sizeof(*dev->context_sareas), - DRM_MEM_MAPS); - if (!dev->context_sareas) { - clear_bit(bit, dev->ctx_bitmap); - mutex_unlock(&dev->struct_mutex); - return -1; - } - dev->context_sareas[bit] = NULL; - } - } + ret = idr_get_new_above(&dev->ctx_idr, new_ctx, DRM_RESERVED_CONTEXTS, &new_id); + if (ret == -EAGAIN) { mutex_unlock(&dev->struct_mutex); - return bit; + goto again; } + mutex_unlock(&dev->struct_mutex); - return -1; + + new_ctx->ctx_id = new_id; + list_add(&new_ctx->head, &dev->context_sarealist); + return new_id; } /** @@ -149,25 +122,8 @@ static int drm_ctxbitmap_next(drm_device_t * dev) */ int drm_ctxbitmap_init(drm_device_t * dev) { - int i; - int temp; - - mutex_lock(&dev->struct_mutex); - dev->ctx_bitmap = (unsigned long *)drm_alloc(PAGE_SIZE, - DRM_MEM_CTXBITMAP); - if (dev->ctx_bitmap == NULL) { - mutex_unlock(&dev->struct_mutex); - return -ENOMEM; - } - memset((void *)dev->ctx_bitmap, 0, PAGE_SIZE); - dev->context_sareas = NULL; - dev->max_context = -1; - mutex_unlock(&dev->struct_mutex); - - for (i = 0; i < DRM_RESERVED_CONTEXTS; i++) { - temp = drm_ctxbitmap_next(dev); - DRM_DEBUG("drm_ctxbitmap_init : %d\n", temp); - } + idr_init(&dev->ctx_idr); + INIT_LIST_HEAD(&dev->context_sarealist); return 0; } @@ -182,12 +138,13 @@ int drm_ctxbitmap_init(drm_device_t * dev) */ void drm_ctxbitmap_cleanup(drm_device_t * dev) { + struct drm_ctx_sarea_list *ctx_entry, *ctx_temp; + mutex_lock(&dev->struct_mutex); - if (dev->context_sareas) - drm_free(dev->context_sareas, - sizeof(*dev->context_sareas) * - dev->max_context, DRM_MEM_MAPS); - drm_free((void *)dev->ctx_bitmap, PAGE_SIZE, DRM_MEM_CTXBITMAP); + list_for_each_entry_safe(ctx_entry, ctx_temp, &dev->context_sarealist, head) { + idr_remove(&dev->ctx_idr, ctx_entry->ctx_id); + drm_free(ctx_entry, sizeof(struct drm_ctx_sarea_list), DRM_MEM_MAPS); + } mutex_unlock(&dev->struct_mutex); } @@ -218,18 +175,20 @@ int drm_getsareactx(struct inode *inode, struct file *filp, drm_ctx_priv_map_t request; drm_map_t *map; drm_map_list_t *_entry; + struct drm_ctx_sarea_list *ctx_sarea; if (copy_from_user(&request, argp, sizeof(request))) return -EFAULT; mutex_lock(&dev->struct_mutex); - if (dev->max_context < 0 - || request.ctx_id >= (unsigned)dev->max_context) { + + ctx_sarea = idr_find(&dev->ctx_idr, request.ctx_id); + if (!ctx_sarea) { mutex_unlock(&dev->struct_mutex); return -EINVAL; } - - map = dev->context_sareas[request.ctx_id]; + + map = ctx_sarea->map; mutex_unlock(&dev->struct_mutex); request.handle = NULL; @@ -268,6 +227,7 @@ int drm_setsareactx(struct inode *inode, struct file *filp, drm_ctx_priv_map_t request; drm_map_t *map = NULL; drm_map_list_t *r_list = NULL; + struct drm_ctx_sarea_list *ctx_sarea; if (copy_from_user(&request, (drm_ctx_priv_map_t __user *) arg, sizeof(request))) @@ -287,11 +247,15 @@ int drm_setsareactx(struct inode *inode, struct file *filp, map = r_list->map; if (!map) goto bad; - if (dev->max_context < 0) - goto bad; - if (request.ctx_id >= (unsigned)dev->max_context) + + mutex_lock(&dev->struct_mutex); + + ctx_sarea = idr_find(&dev->ctx_idr, request.ctx_id); + if (!ctx_sarea) { goto bad; - dev->context_sareas[request.ctx_id] = map; + } + + ctx_sarea->map = map; mutex_unlock(&dev->struct_mutex); return 0; } -- cgit v1.2.3 From 280083d4a2a12a1ff6dc1b068553a4ae8960200c Mon Sep 17 00:00:00 2001 From: Dave Airlie Date: Sun, 10 Jun 2007 15:40:10 +1000 Subject: use krh's idr mods to remove lists from idr code --- linux-core/drm_context.c | 56 ++++++++++++++++++++++-------------------------- 1 file changed, 26 insertions(+), 30 deletions(-) (limited to 'linux-core/drm_context.c') diff --git a/linux-core/drm_context.c b/linux-core/drm_context.c index 5cb79b14..101a298c 100644 --- a/linux-core/drm_context.c +++ b/linux-core/drm_context.c @@ -53,19 +53,18 @@ * \param ctx_handle context handle. * * Clears the bit specified by \p ctx_handle in drm_device::ctx_bitmap and the entry - * in drm_device::context_sareas, while holding the drm_device::struct_mutex + * in drm_device::ctx_idr, while holding the drm_device::struct_mutex * lock. */ void drm_ctxbitmap_free(drm_device_t * dev, int ctx_handle) { - struct drm_ctx_sarea_list *ctx_sarea; + struct drm_ctx_sarea_list *ctx; mutex_lock(&dev->struct_mutex); - ctx_sarea = idr_find(&dev->ctx_idr, ctx_handle); - if (ctx_sarea) { + ctx = idr_find(&dev->ctx_idr, ctx_handle); + if (ctx) { idr_remove(&dev->ctx_idr, ctx_handle); - list_del(&ctx_sarea->head); - drm_free(ctx_sarea, sizeof(struct drm_ctx_sarea_list), DRM_MEM_BUFS); + drm_free(ctx, sizeof(struct drm_ctx_sarea_list), DRM_MEM_CTXLIST); } else DRM_ERROR("Attempt to free invalid context handle: %d\n", ctx_handle); mutex_unlock(&dev->struct_mutex); @@ -78,8 +77,7 @@ void drm_ctxbitmap_free(drm_device_t * dev, int ctx_handle) * \param dev DRM device. * \return (non-negative) context handle on success or a negative number on failure. * - * Find the first zero bit in drm_device::ctx_bitmap and (re)allocates - * drm_device::context_sareas to accommodate the new entry while holding the + * Allocate a new idr from drm_device::ctx_idr while holding the * drm_device::struct_mutex lock. */ static int drm_ctxbitmap_next(drm_device_t * dev) @@ -88,14 +86,14 @@ static int drm_ctxbitmap_next(drm_device_t * dev) int ret; struct drm_ctx_sarea_list *new_ctx; - new_ctx = drm_calloc(1, sizeof(struct drm_ctx_sarea_list), DRM_MEM_BUFS); + new_ctx = drm_calloc(1, sizeof(struct drm_ctx_sarea_list), DRM_MEM_CTXLIST); if (!new_ctx) return -1; again: if (idr_pre_get(&dev->ctx_idr, GFP_KERNEL) == 0) { DRM_ERROR("Out of memory expanding drawable idr\n"); - drm_free(new_ctx, sizeof(struct drm_ctx_sarea_list), DRM_MEM_BUFS); + drm_free(new_ctx, sizeof(struct drm_ctx_sarea_list), DRM_MEM_CTXLIST); return -ENOMEM; } mutex_lock(&dev->struct_mutex); @@ -106,9 +104,6 @@ again: } mutex_unlock(&dev->struct_mutex); - - new_ctx->ctx_id = new_id; - list_add(&new_ctx->head, &dev->context_sarealist); return new_id; } @@ -117,14 +112,20 @@ again: * * \param dev DRM device. * - * Allocates and initialize drm_device::ctx_bitmap and drm_device::context_sareas, while holding - * the drm_device::struct_mutex lock. + * Initialise the drm_device::ctx_idr */ int drm_ctxbitmap_init(drm_device_t * dev) { idr_init(&dev->ctx_idr); - INIT_LIST_HEAD(&dev->context_sarealist); + return 0; +} + + +static int drm_ctx_sarea_free(int id, void *p, void *data) +{ + struct drm_ctx_sarea_list *ctx_entry = p; + drm_free(ctx_entry, sizeof(struct drm_ctx_sarea_list), DRM_MEM_CTXLIST); return 0; } @@ -133,18 +134,14 @@ int drm_ctxbitmap_init(drm_device_t * dev) * * \param dev DRM device. * - * Frees drm_device::ctx_bitmap and drm_device::context_sareas, while holding - * the drm_device::struct_mutex lock. + * Free all idr members using drm_ctx_sarea_free helper function + * while holding the drm_device::struct_mutex lock. */ void drm_ctxbitmap_cleanup(drm_device_t * dev) { - struct drm_ctx_sarea_list *ctx_entry, *ctx_temp; - mutex_lock(&dev->struct_mutex); - list_for_each_entry_safe(ctx_entry, ctx_temp, &dev->context_sarealist, head) { - idr_remove(&dev->ctx_idr, ctx_entry->ctx_id); - drm_free(ctx_entry, sizeof(struct drm_ctx_sarea_list), DRM_MEM_MAPS); - } + idr_for_each(&dev->ctx_idr, drm_ctx_sarea_free, NULL); + idr_remove_all(&dev->ctx_idr); mutex_unlock(&dev->struct_mutex); } @@ -163,7 +160,7 @@ void drm_ctxbitmap_cleanup(drm_device_t * dev) * \param arg user argument pointing to a drm_ctx_priv_map structure. * \return zero on success or a negative number on failure. * - * Gets the map from drm_device::context_sareas with the handle specified and + * Gets the map from drm_device::ctx_idr with the handle specified and * returns its handle. */ int drm_getsareactx(struct inode *inode, struct file *filp, @@ -187,8 +184,8 @@ int drm_getsareactx(struct inode *inode, struct file *filp, mutex_unlock(&dev->struct_mutex); return -EINVAL; } - map = ctx_sarea->map; + mutex_unlock(&dev->struct_mutex); request.handle = NULL; @@ -217,7 +214,7 @@ int drm_getsareactx(struct inode *inode, struct file *filp, * \return zero on success or a negative number on failure. * * Searches the mapping specified in \p arg and update the entry in - * drm_device::context_sareas with it. + * drm_device::ctx_idr with it. */ int drm_setsareactx(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg) @@ -251,10 +248,9 @@ int drm_setsareactx(struct inode *inode, struct file *filp, mutex_lock(&dev->struct_mutex); ctx_sarea = idr_find(&dev->ctx_idr, request.ctx_id); - if (!ctx_sarea) { + if (!ctx_sarea) goto bad; - } - + ctx_sarea->map = map; mutex_unlock(&dev->struct_mutex); return 0; -- cgit v1.2.3 From 1814a829eb65ee53a14fa9b53fc6f3a4196dcaa5 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Kristian=20H=C3=B8gsberg?= Date: Tue, 3 Jul 2007 10:31:46 -0400 Subject: Don't take dev->struct_mutex twice in drm_setsareactx. --- linux-core/drm_context.c | 2 -- 1 file changed, 2 deletions(-) (limited to 'linux-core/drm_context.c') diff --git a/linux-core/drm_context.c b/linux-core/drm_context.c index 101a298c..ff08e809 100644 --- a/linux-core/drm_context.c +++ b/linux-core/drm_context.c @@ -245,8 +245,6 @@ int drm_setsareactx(struct inode *inode, struct file *filp, if (!map) goto bad; - mutex_lock(&dev->struct_mutex); - ctx_sarea = idr_find(&dev->ctx_idr, request.ctx_id); if (!ctx_sarea) goto bad; -- cgit v1.2.3 From d57b7f02d2e525e5600e5d77370d7ad2b4c9b265 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Kristian=20H=C3=B8gsberg?= Date: Tue, 3 Jul 2007 10:41:48 -0400 Subject: Use idr_replace trick to eliminate struct drm_ctx_sarea_list. --- linux-core/drm_context.c | 41 +++++++---------------------------------- 1 file changed, 7 insertions(+), 34 deletions(-) (limited to 'linux-core/drm_context.c') diff --git a/linux-core/drm_context.c b/linux-core/drm_context.c index ff08e809..195c7fb5 100644 --- a/linux-core/drm_context.c +++ b/linux-core/drm_context.c @@ -58,17 +58,9 @@ */ void drm_ctxbitmap_free(drm_device_t * dev, int ctx_handle) { - struct drm_ctx_sarea_list *ctx; - mutex_lock(&dev->struct_mutex); - ctx = idr_find(&dev->ctx_idr, ctx_handle); - if (ctx) { - idr_remove(&dev->ctx_idr, ctx_handle); - drm_free(ctx, sizeof(struct drm_ctx_sarea_list), DRM_MEM_CTXLIST); - } else - DRM_ERROR("Attempt to free invalid context handle: %d\n", ctx_handle); + idr_remove(&dev->ctx_idr, ctx_handle); mutex_unlock(&dev->struct_mutex); - return; } /** @@ -84,20 +76,15 @@ static int drm_ctxbitmap_next(drm_device_t * dev) { int new_id; int ret; - struct drm_ctx_sarea_list *new_ctx; - - new_ctx = drm_calloc(1, sizeof(struct drm_ctx_sarea_list), DRM_MEM_CTXLIST); - if (!new_ctx) - return -1; again: if (idr_pre_get(&dev->ctx_idr, GFP_KERNEL) == 0) { DRM_ERROR("Out of memory expanding drawable idr\n"); - drm_free(new_ctx, sizeof(struct drm_ctx_sarea_list), DRM_MEM_CTXLIST); return -ENOMEM; } mutex_lock(&dev->struct_mutex); - ret = idr_get_new_above(&dev->ctx_idr, new_ctx, DRM_RESERVED_CONTEXTS, &new_id); + ret = idr_get_new_above(&dev->ctx_idr, NULL, + DRM_RESERVED_CONTEXTS, &new_id); if (ret == -EAGAIN) { mutex_unlock(&dev->struct_mutex); goto again; @@ -120,15 +107,6 @@ int drm_ctxbitmap_init(drm_device_t * dev) return 0; } - - -static int drm_ctx_sarea_free(int id, void *p, void *data) -{ - struct drm_ctx_sarea_list *ctx_entry = p; - drm_free(ctx_entry, sizeof(struct drm_ctx_sarea_list), DRM_MEM_CTXLIST); - return 0; -} - /** * Context bitmap cleanup. * @@ -140,7 +118,6 @@ static int drm_ctx_sarea_free(int id, void *p, void *data) void drm_ctxbitmap_cleanup(drm_device_t * dev) { mutex_lock(&dev->struct_mutex); - idr_for_each(&dev->ctx_idr, drm_ctx_sarea_free, NULL); idr_remove_all(&dev->ctx_idr); mutex_unlock(&dev->struct_mutex); } @@ -172,19 +149,17 @@ int drm_getsareactx(struct inode *inode, struct file *filp, drm_ctx_priv_map_t request; drm_map_t *map; drm_map_list_t *_entry; - struct drm_ctx_sarea_list *ctx_sarea; if (copy_from_user(&request, argp, sizeof(request))) return -EFAULT; mutex_lock(&dev->struct_mutex); - ctx_sarea = idr_find(&dev->ctx_idr, request.ctx_id); - if (!ctx_sarea) { + map = idr_find(&dev->ctx_idr, request.ctx_id); + if (!map) { mutex_unlock(&dev->struct_mutex); return -EINVAL; } - map = ctx_sarea->map; mutex_unlock(&dev->struct_mutex); @@ -224,7 +199,6 @@ int drm_setsareactx(struct inode *inode, struct file *filp, drm_ctx_priv_map_t request; drm_map_t *map = NULL; drm_map_list_t *r_list = NULL; - struct drm_ctx_sarea_list *ctx_sarea; if (copy_from_user(&request, (drm_ctx_priv_map_t __user *) arg, sizeof(request))) @@ -245,12 +219,11 @@ int drm_setsareactx(struct inode *inode, struct file *filp, if (!map) goto bad; - ctx_sarea = idr_find(&dev->ctx_idr, request.ctx_id); - if (!ctx_sarea) + if (IS_ERR(idr_replace(&dev->ctx_idr, map, request.ctx_id))) goto bad; - ctx_sarea->map = map; mutex_unlock(&dev->struct_mutex); + return 0; } -- cgit v1.2.3