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Merge branch 'drm-patches' of ssh://master.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6

Browse Source 
* 'drm-patches' of ssh://master.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6:
  drm: convert drawable code to using idr
  drm: convert drm context code to use Linux idr
This commit is contained in:
Linus Torvalds 2007-07-16 18:24:37 -07:00
commit a5fcaa2106
4 changed files with 94 additions and 313 deletions
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11
drivers/char/drm/drmP.h
View File

@ -75,6 +75,8 @@
#include <asm/pgalloc.h>
#include "drm.h"
#include <linux/idr.h>
#define __OS_HAS_AGP (defined(CONFIG_AGP) || (defined(CONFIG_AGP_MODULE) && defined(MODULE)))
#define __OS_HAS_MTRR (defined(CONFIG_MTRR))
@ -676,8 +678,7 @@ struct drm_device {
int ctx_count; /**< Number of context handles */
struct mutex ctxlist_mutex; /**< For ctxlist */
struct drm_map **context_sareas; /**< per-context SAREA's */
int max_context;
struct idr ctx_idr;
struct list_head vmalist; /**< List of vmas (for debugging) */
struct drm_lock_data lock; /**< Information on hardware lock */
@ -750,10 +751,7 @@ struct drm_device {
/** \name Drawable information */
/*@{ */
spinlock_t drw_lock;
unsigned int drw_bitfield_length;
u32 *drw_bitfield;
unsigned int drw_info_length;
struct drm_drawable_info **drw_info;
struct idr drw_idr;
/*@} */
};
@ -903,6 +901,7 @@ extern int drm_update_drawable_info(struct inode *inode, struct file *filp,
unsigned int cmd, unsigned long arg);
extern struct drm_drawable_info *drm_get_drawable_info(struct drm_device *dev,
drm_drawable_t id);
extern void drm_drawable_free_all(struct drm_device *dev);
/* Authentication IOCTL support (drm_auth.h) */
extern int drm_getmagic(struct inode *inode, struct file *filp,

131
drivers/char/drm/drm_context.c
View File

@ -53,26 +53,14 @@
* \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(struct drm_device * 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);
return;
mutex_lock(&dev->struct_mutex);
idr_remove(&dev->ctx_idr, ctx_handle);
mutex_unlock(&dev->struct_mutex);
}
/**
@ -81,62 +69,28 @@ void drm_ctxbitmap_free(struct drm_device * 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(struct drm_device * dev)
{
int bit;
if (!dev->ctx_bitmap)
return -1;
int new_id;
int ret;
again:
if (idr_pre_get(&dev->ctx_idr, GFP_KERNEL) == 0) {
DRM_ERROR("Out of memory expanding drawable idr\n");
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) {
struct drm_map **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, NULL,
DRM_RESERVED_CONTEXTS, &new_id);
if (ret == -EAGAIN) {
mutex_unlock(&dev->struct_mutex);
return bit;
goto again;
}
mutex_unlock(&dev->struct_mutex);
return -1;
return new_id;
}
/**
@ -144,31 +98,11 @@ static int drm_ctxbitmap_next(struct drm_device * dev)
*
* \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(struct drm_device * 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);
return 0;
}
@ -177,17 +111,13 @@ int drm_ctxbitmap_init(struct drm_device * 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(struct drm_device * dev)
{
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);
idr_remove_all(&dev->ctx_idr);
mutex_unlock(&dev->struct_mutex);
}
@ -206,7 +136,7 @@ void drm_ctxbitmap_cleanup(struct drm_device * 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,
@ -223,13 +153,13 @@ int drm_getsareactx(struct inode *inode, struct file *filp,
return -EFAULT;
mutex_lock(&dev->struct_mutex);
if (dev->max_context < 0
|| request.ctx_id >= (unsigned)dev->max_context) {
map = idr_find(&dev->ctx_idr, request.ctx_id);
if (!map) {
mutex_unlock(&dev->struct_mutex);
return -EINVAL;
}
map = dev->context_sareas[request.ctx_id];
mutex_unlock(&dev->struct_mutex);
request.handle = NULL;
@ -258,7 +188,7 @@ 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)
@ -288,11 +218,10 @@ int drm_setsareactx(struct inode *inode, struct file *filp,
map = r_list->map;
if (!map)
goto bad;
if (dev->max_context < 0)
if (IS_ERR(idr_replace(&dev->ctx_idr, map, request.ctx_id)))
goto bad;
if (request.ctx_id >= (unsigned)dev->max_context)
goto bad;
dev->context_sareas[request.ctx_id] = map;
mutex_unlock(&dev->struct_mutex);
return 0;
}

250
drivers/char/drm/drm_drawable.c
View File

@ -44,82 +44,29 @@ int drm_adddraw(DRM_IOCTL_ARGS)
{
DRM_DEVICE;
unsigned long irqflags;
int i, j;
u32 *bitfield = dev->drw_bitfield;
unsigned int bitfield_length = dev->drw_bitfield_length;
struct drm_drawable_info **info = dev->drw_info;
unsigned int info_length = dev->drw_info_length;
struct drm_draw draw;
int new_id = 0;
int ret;
for (i = 0, j = 0; i < bitfield_length; i++) {
if (bitfield[i] == ~0)
continue;
for (; j < 8 * sizeof(*bitfield); j++)
if (!(bitfield[i] & (1 << j)))
goto done;
again:
if (idr_pre_get(&dev->drw_idr, GFP_KERNEL) == 0) {
DRM_ERROR("Out of memory expanding drawable idr\n");
return -ENOMEM;
}
done:
if (i == bitfield_length) {
bitfield_length++;
bitfield = drm_alloc(bitfield_length * sizeof(*bitfield),
DRM_MEM_BUFS);
if (!bitfield) {
DRM_ERROR("Failed to allocate new drawable bitfield\n");
return DRM_ERR(ENOMEM);
}
if (8 * sizeof(*bitfield) * bitfield_length > info_length) {
info_length += 8 * sizeof(*bitfield);
info = drm_alloc(info_length * sizeof(*info),
DRM_MEM_BUFS);
if (!info) {
DRM_ERROR("Failed to allocate new drawable info"
" array\n");
drm_free(bitfield,
bitfield_length * sizeof(*bitfield),
DRM_MEM_BUFS);
return DRM_ERR(ENOMEM);
}
}
bitfield[i] = 0;
}
draw.handle = i * 8 * sizeof(*bitfield) + j + 1;
DRM_DEBUG("%d\n", draw.handle);
spin_lock_irqsave(&dev->drw_lock, irqflags);
bitfield[i] |= 1 << j;
info[draw.handle - 1] = NULL;
if (bitfield != dev->drw_bitfield) {
memcpy(bitfield, dev->drw_bitfield, dev->drw_bitfield_length *
sizeof(*bitfield));
drm_free(dev->drw_bitfield, sizeof(*bitfield) *
dev->drw_bitfield_length, DRM_MEM_BUFS);
dev->drw_bitfield = bitfield;
dev->drw_bitfield_length = bitfield_length;
}
if (info != dev->drw_info) {
memcpy(info, dev->drw_info, dev->drw_info_length *
sizeof(*info));
drm_free(dev->drw_info, sizeof(*info) * dev->drw_info_length,
DRM_MEM_BUFS);
dev->drw_info = info;
dev->drw_info_length = info_length;
ret = idr_get_new_above(&dev->drw_idr, NULL, 1, &new_id);
if (ret == -EAGAIN) {
spin_unlock_irqrestore(&dev->drw_lock, irqflags);
goto again;
}
spin_unlock_irqrestore(&dev->drw_lock, irqflags);
draw.handle = new_id;
DRM_DEBUG("%d\n", draw.handle);
DRM_COPY_TO_USER_IOCTL((struct drm_draw __user *)data, draw, sizeof(draw));
return 0;
@ -132,133 +79,44 @@ int drm_rmdraw(DRM_IOCTL_ARGS)
{
DRM_DEVICE;
struct drm_draw draw;
int id, idx;
unsigned int shift;
unsigned long irqflags;
u32 *bitfield = dev->drw_bitfield;
unsigned int bitfield_length = dev->drw_bitfield_length;
struct drm_drawable_info **info = dev->drw_info;
unsigned int info_length = dev->drw_info_length;
DRM_COPY_FROM_USER_IOCTL(draw, (struct drm_draw __user *) data,
sizeof(draw));
id = draw.handle - 1;
idx = id / (8 * sizeof(*bitfield));
shift = id % (8 * sizeof(*bitfield));
if (idx < 0 || idx >= bitfield_length ||
!(bitfield[idx] & (1 << shift))) {
DRM_DEBUG("No such drawable %d\n", draw.handle);
return 0;
}
spin_lock_irqsave(&dev->drw_lock, irqflags);
bitfield[idx] &= ~(1 << shift);
drm_free(drm_get_drawable_info(dev, draw.handle),
sizeof(struct drm_drawable_info), DRM_MEM_BUFS);
idr_remove(&dev->drw_idr, draw.handle);
spin_unlock_irqrestore(&dev->drw_lock, irqflags);
if (info[id]) {
drm_free(info[id]->rects, info[id]->num_rects *
sizeof(struct drm_clip_rect), DRM_MEM_BUFS);
drm_free(info[id], sizeof(**info), DRM_MEM_BUFS);
}
/* Can we shrink the arrays? */
if (idx == bitfield_length - 1) {
while (idx >= 0 && !bitfield[idx])
--idx;
bitfield_length = idx + 1;
bitfield = NULL;
if (bitfield_length) {
if (bitfield_length != dev->drw_bitfield_length)
bitfield = drm_alloc(bitfield_length *
sizeof(*bitfield),
DRM_MEM_BUFS);
if (!bitfield) {
bitfield = dev->drw_bitfield;
bitfield_length = dev->drw_bitfield_length;
}
}
}
if (bitfield != dev->drw_bitfield) {
info_length = 8 * sizeof(*bitfield) * bitfield_length;
if (info_length) {
info = drm_alloc(info_length * sizeof(*info),
DRM_MEM_BUFS);
if (!info) {
info = dev->drw_info;
info_length = dev->drw_info_length;
}
} else
info = NULL;
spin_lock_irqsave(&dev->drw_lock, irqflags);
if (bitfield)
memcpy(bitfield, dev->drw_bitfield, bitfield_length *
sizeof(*bitfield));
drm_free(dev->drw_bitfield, sizeof(*bitfield) *
dev->drw_bitfield_length, DRM_MEM_BUFS);
dev->drw_bitfield = bitfield;
dev->drw_bitfield_length = bitfield_length;
if (info != dev->drw_info) {
if (info)
memcpy(info, dev->drw_info, info_length *
sizeof(*info));
drm_free(dev->drw_info, sizeof(*info) *
dev->drw_info_length, DRM_MEM_BUFS);
dev->drw_info = info;
dev->drw_info_length = info_length;
}
spin_unlock_irqrestore(&dev->drw_lock, irqflags);
}
DRM_DEBUG("%d\n", draw.handle);
return 0;
}
int drm_update_drawable_info(DRM_IOCTL_ARGS) {
int drm_update_drawable_info(DRM_IOCTL_ARGS)
{
DRM_DEVICE;
struct drm_update_draw update;
unsigned int id, idx, shift;
u32 *bitfield = dev->drw_bitfield;
unsigned long irqflags, bitfield_length = dev->drw_bitfield_length;
struct drm_drawable_info *info;
unsigned long irqflags;
struct drm_clip_rect *rects;
struct drm_drawable_info *info;
int err;
DRM_COPY_FROM_USER_IOCTL(update, (struct drm_update_draw __user *) data,
sizeof(update));
id = update.handle - 1;
idx = id / (8 * sizeof(*bitfield));
shift = id % (8 * sizeof(*bitfield));
if (idx < 0 || idx >= bitfield_length ||
!(bitfield[idx] & (1 << shift))) {
DRM_ERROR("No such drawable %d\n", update.handle);
return DRM_ERR(EINVAL);
}
info = dev->drw_info[id];
info = idr_find(&dev->drw_idr, update.handle);
if (!info) {
info = drm_calloc(1, sizeof(struct drm_drawable_info), DRM_MEM_BUFS);
if (!info) {
DRM_ERROR("Failed to allocate drawable info memory\n");
return DRM_ERR(ENOMEM);
info = drm_calloc(1, sizeof(*info), DRM_MEM_BUFS);
if (!info)
return -ENOMEM;
if (IS_ERR(idr_replace(&dev->drw_idr, info, update.handle))) {
DRM_ERROR("No such drawable %d\n", update.handle);
drm_free(info, sizeof(*info), DRM_MEM_BUFS);
return -EINVAL;
}
}
@ -295,12 +153,11 @@ int drm_update_drawable_info(DRM_IOCTL_ARGS) {
info->rects = rects;
info->num_rects = update.num;
dev->drw_info[id] = info;
spin_unlock_irqrestore(&dev->drw_lock, irqflags);
DRM_DEBUG("Updated %d cliprects for drawable %d\n",
info->num_rects, id);
info->num_rects, update.handle);
break;
default:
DRM_ERROR("Invalid update type %d\n", update.type);
@ -310,11 +167,9 @@ int drm_update_drawable_info(DRM_IOCTL_ARGS) {
return 0;
error:
if (!dev->drw_info[id])
drm_free(info, sizeof(*info), DRM_MEM_BUFS);
else if (rects != dev->drw_info[id]->rects)
drm_free(rects, update.num *
sizeof(struct drm_clip_rect), DRM_MEM_BUFS);
if (rects != info->rects)
drm_free(rects, update.num * sizeof(struct drm_clip_rect),
DRM_MEM_BUFS);
return err;
}
@ -322,20 +177,27 @@ int drm_update_drawable_info(DRM_IOCTL_ARGS) {
/**
* Caller must hold the drawable spinlock!
*/
struct drm_drawable_info *drm_get_drawable_info(struct drm_device *dev, drm_drawable_t id) {
u32 *bitfield = dev->drw_bitfield;
unsigned int idx, shift;
id--;
idx = id / (8 * sizeof(*bitfield));
shift = id % (8 * sizeof(*bitfield));
if (idx < 0 || idx >= dev->drw_bitfield_length ||
!(bitfield[idx] & (1 << shift))) {
DRM_DEBUG("No such drawable %d\n", id);
return NULL;
}
return dev->drw_info[id];
struct drm_drawable_info *drm_get_drawable_info(struct drm_device *dev, drm_drawable_t id)
{
return idr_find(&dev->drw_idr, id);
}
EXPORT_SYMBOL(drm_get_drawable_info);
static int drm_drawable_free(int idr, void *p, void *data)
{
struct drm_drawable_info *info = p;
if (info) {
drm_free(info->rects, info->num_rects *
sizeof(struct drm_clip_rect), DRM_MEM_BUFS);
drm_free(info, sizeof(*info), DRM_MEM_BUFS);
}
return 0;
}
void drm_drawable_free_all(struct drm_device *dev)
{
idr_for_each(&dev->drw_idr, drm_drawable_free, NULL);
idr_remove_all(&dev->drw_idr);
}

15
drivers/char/drm/drm_drv.c
View File

@ -151,19 +151,10 @@ int drm_lastclose(struct drm_device * dev)
if (dev->irq_enabled)
drm_irq_uninstall(dev);
/* Free drawable information memory */
for (i = 0; i < dev->drw_bitfield_length / sizeof(*dev->drw_bitfield);
i++) {
struct drm_drawable_info *info = drm_get_drawable_info(dev, i);
if (info) {
drm_free(info->rects, info->num_rects *
sizeof(struct drm_clip_rect), DRM_MEM_BUFS);
drm_free(info, sizeof(*info), DRM_MEM_BUFS);
}
}
mutex_lock(&dev->struct_mutex);
/* Free drawable information memory */
drm_drawable_free_all(dev);
del_timer(&dev->timer);
/* Clear pid list */