2005-04-17 06:20:36 +08:00
|
|
|
/**
|
2005-09-25 12:28:13 +08:00
|
|
|
* \file drm_context.c
|
2005-04-17 06:20:36 +08:00
|
|
|
* IOCTLs for generic contexts
|
2005-09-25 12:28:13 +08:00
|
|
|
*
|
2005-04-17 06:20:36 +08:00
|
|
|
* \author Rickard E. (Rik) Faith <faith@valinux.com>
|
|
|
|
* \author Gareth Hughes <gareth@valinux.com>
|
|
|
|
*/
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Created: Fri Nov 24 18:31:37 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.
|
|
|
|
*/
|
|
|
|
|
|
|
|
/*
|
|
|
|
* ChangeLog:
|
|
|
|
* 2001-11-16 Torsten Duwe <duwe@caldera.de>
|
|
|
|
* added context constructor/destructor hooks,
|
|
|
|
* needed by SiS driver's memory management.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include "drmP.h"
|
|
|
|
|
|
|
|
/******************************************************************/
|
|
|
|
/** \name Context bitmap support */
|
|
|
|
/*@{*/
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Free a handle from the context bitmap.
|
|
|
|
*
|
|
|
|
* \param dev DRM device.
|
|
|
|
* \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_sem
|
|
|
|
* lock.
|
|
|
|
*/
|
2005-09-25 12:28:13 +08:00
|
|
|
void drm_ctxbitmap_free(drm_device_t * dev, int ctx_handle)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2005-09-25 12:28:13 +08:00
|
|
|
if (ctx_handle < 0)
|
|
|
|
goto failed;
|
|
|
|
if (!dev->ctx_bitmap)
|
|
|
|
goto failed;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2005-09-25 12:28:13 +08:00
|
|
|
if (ctx_handle < DRM_MAX_CTXBITMAP) {
|
2005-04-17 06:20:36 +08:00
|
|
|
down(&dev->struct_sem);
|
2005-09-25 12:28:13 +08:00
|
|
|
clear_bit(ctx_handle, dev->ctx_bitmap);
|
2005-04-17 06:20:36 +08:00
|
|
|
dev->context_sareas[ctx_handle] = NULL;
|
|
|
|
up(&dev->struct_sem);
|
|
|
|
return;
|
|
|
|
}
|
2005-09-25 12:28:13 +08:00
|
|
|
failed:
|
|
|
|
DRM_ERROR("Attempt to free invalid context handle: %d\n", ctx_handle);
|
|
|
|
return;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2005-09-25 12:28:13 +08:00
|
|
|
/**
|
2005-04-17 06:20:36 +08:00
|
|
|
* Context bitmap allocation.
|
|
|
|
*
|
|
|
|
* \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
|
|
|
|
* drm_device::struct_sem lock.
|
|
|
|
*/
|
2005-09-25 12:28:13 +08:00
|
|
|
static int drm_ctxbitmap_next(drm_device_t * dev)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
int bit;
|
|
|
|
|
2005-09-25 12:28:13 +08:00
|
|
|
if (!dev->ctx_bitmap)
|
|
|
|
return -1;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
down(&dev->struct_sem);
|
2005-09-25 12:28:13 +08:00
|
|
|
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) {
|
2005-04-17 06:20:36 +08:00
|
|
|
drm_map_t **ctx_sareas;
|
|
|
|
|
|
|
|
ctx_sareas = drm_realloc(dev->context_sareas,
|
2005-09-25 12:28:13 +08:00
|
|
|
(dev->max_context -
|
|
|
|
1) *
|
|
|
|
sizeof(*dev->
|
|
|
|
context_sareas),
|
|
|
|
dev->max_context *
|
|
|
|
sizeof(*dev->
|
|
|
|
context_sareas),
|
|
|
|
DRM_MEM_MAPS);
|
|
|
|
if (!ctx_sareas) {
|
2005-04-17 06:20:36 +08:00
|
|
|
clear_bit(bit, dev->ctx_bitmap);
|
|
|
|
up(&dev->struct_sem);
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
dev->context_sareas = ctx_sareas;
|
|
|
|
dev->context_sareas[bit] = NULL;
|
|
|
|
} else {
|
|
|
|
/* max_context == 1 at this point */
|
2005-09-25 12:28:13 +08:00
|
|
|
dev->context_sareas =
|
|
|
|
drm_alloc(dev->max_context *
|
|
|
|
sizeof(*dev->context_sareas),
|
|
|
|
DRM_MEM_MAPS);
|
|
|
|
if (!dev->context_sareas) {
|
2005-04-17 06:20:36 +08:00
|
|
|
clear_bit(bit, dev->ctx_bitmap);
|
|
|
|
up(&dev->struct_sem);
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
dev->context_sareas[bit] = NULL;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
up(&dev->struct_sem);
|
|
|
|
return bit;
|
|
|
|
}
|
|
|
|
up(&dev->struct_sem);
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Context bitmap initialization.
|
|
|
|
*
|
|
|
|
* \param dev DRM device.
|
|
|
|
*
|
|
|
|
* Allocates and initialize drm_device::ctx_bitmap and drm_device::context_sareas, while holding
|
|
|
|
* the drm_device::struct_sem lock.
|
|
|
|
*/
|
2005-09-25 12:28:13 +08:00
|
|
|
int drm_ctxbitmap_init(drm_device_t * dev)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
int i;
|
2005-09-25 12:28:13 +08:00
|
|
|
int temp;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
down(&dev->struct_sem);
|
2005-09-25 12:28:13 +08:00
|
|
|
dev->ctx_bitmap = (unsigned long *)drm_alloc(PAGE_SIZE,
|
|
|
|
DRM_MEM_CTXBITMAP);
|
|
|
|
if (dev->ctx_bitmap == NULL) {
|
2005-04-17 06:20:36 +08:00
|
|
|
up(&dev->struct_sem);
|
|
|
|
return -ENOMEM;
|
|
|
|
}
|
2005-09-25 12:28:13 +08:00
|
|
|
memset((void *)dev->ctx_bitmap, 0, PAGE_SIZE);
|
2005-04-17 06:20:36 +08:00
|
|
|
dev->context_sareas = NULL;
|
|
|
|
dev->max_context = -1;
|
|
|
|
up(&dev->struct_sem);
|
|
|
|
|
2005-09-25 12:28:13 +08:00
|
|
|
for (i = 0; i < DRM_RESERVED_CONTEXTS; i++) {
|
|
|
|
temp = drm_ctxbitmap_next(dev);
|
|
|
|
DRM_DEBUG("drm_ctxbitmap_init : %d\n", temp);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Context bitmap cleanup.
|
|
|
|
*
|
|
|
|
* \param dev DRM device.
|
|
|
|
*
|
|
|
|
* Frees drm_device::ctx_bitmap and drm_device::context_sareas, while holding
|
|
|
|
* the drm_device::struct_sem lock.
|
|
|
|
*/
|
2005-09-25 12:28:13 +08:00
|
|
|
void drm_ctxbitmap_cleanup(drm_device_t * dev)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
down(&dev->struct_sem);
|
2005-09-25 12:28:13 +08:00
|
|
|
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);
|
2005-04-17 06:20:36 +08:00
|
|
|
up(&dev->struct_sem);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*@}*/
|
|
|
|
|
|
|
|
/******************************************************************/
|
|
|
|
/** \name Per Context SAREA Support */
|
|
|
|
/*@{*/
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Get per-context SAREA.
|
2005-09-25 12:28:13 +08:00
|
|
|
*
|
2005-04-17 06:20:36 +08:00
|
|
|
* \param inode device inode.
|
|
|
|
* \param filp file pointer.
|
|
|
|
* \param cmd command.
|
|
|
|
* \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
|
|
|
|
* returns its handle.
|
|
|
|
*/
|
|
|
|
int drm_getsareactx(struct inode *inode, struct file *filp,
|
2005-09-25 12:28:13 +08:00
|
|
|
unsigned int cmd, unsigned long arg)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2005-09-25 12:28:13 +08:00
|
|
|
drm_file_t *priv = filp->private_data;
|
|
|
|
drm_device_t *dev = priv->head->dev;
|
2005-04-17 06:20:36 +08:00
|
|
|
drm_ctx_priv_map_t __user *argp = (void __user *)arg;
|
|
|
|
drm_ctx_priv_map_t request;
|
|
|
|
drm_map_t *map;
|
2005-08-05 20:11:22 +08:00
|
|
|
drm_map_list_t *_entry;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
if (copy_from_user(&request, argp, sizeof(request)))
|
|
|
|
return -EFAULT;
|
|
|
|
|
|
|
|
down(&dev->struct_sem);
|
2005-09-25 12:28:13 +08:00
|
|
|
if (dev->max_context < 0
|
|
|
|
|| request.ctx_id >= (unsigned)dev->max_context) {
|
2005-04-17 06:20:36 +08:00
|
|
|
up(&dev->struct_sem);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
map = dev->context_sareas[request.ctx_id];
|
|
|
|
up(&dev->struct_sem);
|
|
|
|
|
2005-09-30 16:37:36 +08:00
|
|
|
request.handle = NULL;
|
2005-09-25 12:28:13 +08:00
|
|
|
list_for_each_entry(_entry, &dev->maplist->head, head) {
|
2005-08-05 20:11:22 +08:00
|
|
|
if (_entry->map == map) {
|
2005-09-25 12:28:13 +08:00
|
|
|
request.handle =
|
|
|
|
(void *)(unsigned long)_entry->user_token;
|
2005-08-05 20:11:22 +08:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
2005-09-30 16:37:36 +08:00
|
|
|
if (request.handle == NULL)
|
2005-08-05 20:11:22 +08:00
|
|
|
return -EINVAL;
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
if (copy_to_user(argp, &request, sizeof(request)))
|
|
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Set per-context SAREA.
|
2005-09-25 12:28:13 +08:00
|
|
|
*
|
2005-04-17 06:20:36 +08:00
|
|
|
* \param inode device inode.
|
|
|
|
* \param filp file pointer.
|
|
|
|
* \param cmd command.
|
|
|
|
* \param arg user argument pointing to a drm_ctx_priv_map structure.
|
|
|
|
* \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.
|
|
|
|
*/
|
|
|
|
int drm_setsareactx(struct inode *inode, struct file *filp,
|
2005-09-25 12:28:13 +08:00
|
|
|
unsigned int cmd, unsigned long arg)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2005-09-25 12:28:13 +08:00
|
|
|
drm_file_t *priv = filp->private_data;
|
|
|
|
drm_device_t *dev = priv->head->dev;
|
2005-04-17 06:20:36 +08:00
|
|
|
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,
|
2005-09-25 12:28:13 +08:00
|
|
|
(drm_ctx_priv_map_t __user *) arg, sizeof(request)))
|
2005-04-17 06:20:36 +08:00
|
|
|
return -EFAULT;
|
|
|
|
|
|
|
|
down(&dev->struct_sem);
|
|
|
|
list_for_each(list, &dev->maplist->head) {
|
|
|
|
r_list = list_entry(list, drm_map_list_t, head);
|
drm: 32/64-bit DRM ioctl compatibility patch
The patch is against a 2.6.11 kernel tree. I am running this with a
32-bit X server (compiled up from X.org CVS as of a couple of weeks
ago) and 32-bit DRI libraries and clients. All the userland stuff is
identical to what I am using under a 32-bit kernel on my G4 powerbook
(which is a 32-bit machine of course). I haven't tried compiling up a
64-bit X server or clients yet.
In the compatibility routines I have assumed that the kernel can
safely access user addresses after set_fs(KERNEL_DS). That is, where
an ioctl argument structure contains pointers to other structures, and
those other structures are already compatible between the 32-bit and
64-bit ABIs (i.e. they only contain things like chars, shorts or
ints), I just check the address with access_ok() and then pass it
through to the 64-bit ioctl code. I believe this approach may not
work on sparc64, but it does work on ppc64 and x86_64 at least.
One tricky area which may need to be revisited is the question of how
to handle the handles which we pass back to userspace to identify
mappings. These handles are generated in the ADDMAP ioctl and then
passed in as the offset value to mmap. However, offset values for
mmap seem to be generated in other ways as well, particularly for AGP
mappings.
The approach I have ended up with is to generate a fake 32-bit handle
only for _DRM_SHM mappings. The handles for other mappings (AGP, REG,
FB) are physical addresses which are already limited to 32 bits, and
generating fake handles for them created all sorts of problems in the
mmap/nopage code.
This patch has been updated to use the new compatibility ioctls.
From: Paul Mackerras <paulus@samba.org>
Signed-off-by: Dave Airlie <airlied@linux.ie>
2005-06-23 19:29:18 +08:00
|
|
|
if (r_list->map
|
2005-09-25 12:28:13 +08:00
|
|
|
&& r_list->user_token == (unsigned long)request.handle)
|
2005-04-17 06:20:36 +08:00
|
|
|
goto found;
|
|
|
|
}
|
2005-09-25 12:28:13 +08:00
|
|
|
bad:
|
2005-04-17 06:20:36 +08:00
|
|
|
up(&dev->struct_sem);
|
|
|
|
return -EINVAL;
|
|
|
|
|
2005-09-25 12:28:13 +08:00
|
|
|
found:
|
2005-04-17 06:20:36 +08:00
|
|
|
map = r_list->map;
|
2005-09-25 12:28:13 +08:00
|
|
|
if (!map)
|
|
|
|
goto bad;
|
2005-04-17 06:20:36 +08:00
|
|
|
if (dev->max_context < 0)
|
|
|
|
goto bad;
|
2005-09-25 12:28:13 +08:00
|
|
|
if (request.ctx_id >= (unsigned)dev->max_context)
|
2005-04-17 06:20:36 +08:00
|
|
|
goto bad;
|
|
|
|
dev->context_sareas[request.ctx_id] = map;
|
|
|
|
up(&dev->struct_sem);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*@}*/
|
|
|
|
|
|
|
|
/******************************************************************/
|
|
|
|
/** \name The actual DRM context handling routines */
|
|
|
|
/*@{*/
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Switch context.
|
|
|
|
*
|
|
|
|
* \param dev DRM device.
|
|
|
|
* \param old old context handle.
|
|
|
|
* \param new new context handle.
|
|
|
|
* \return zero on success or a negative number on failure.
|
|
|
|
*
|
|
|
|
* Attempt to set drm_device::context_flag.
|
|
|
|
*/
|
2005-09-25 12:28:13 +08:00
|
|
|
static int drm_context_switch(drm_device_t * dev, int old, int new)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2005-09-25 12:28:13 +08:00
|
|
|
if (test_and_set_bit(0, &dev->context_flag)) {
|
|
|
|
DRM_ERROR("Reentering -- FIXME\n");
|
|
|
|
return -EBUSY;
|
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2005-09-25 12:28:13 +08:00
|
|
|
DRM_DEBUG("Context switch from %d to %d\n", old, new);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2005-09-25 12:28:13 +08:00
|
|
|
if (new == dev->last_context) {
|
|
|
|
clear_bit(0, &dev->context_flag);
|
|
|
|
return 0;
|
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2005-09-25 12:28:13 +08:00
|
|
|
return 0;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Complete context switch.
|
|
|
|
*
|
|
|
|
* \param dev DRM device.
|
|
|
|
* \param new new context handle.
|
|
|
|
* \return zero on success or a negative number on failure.
|
|
|
|
*
|
|
|
|
* Updates drm_device::last_context and drm_device::last_switch. Verifies the
|
|
|
|
* hardware lock is held, clears the drm_device::context_flag and wakes up
|
|
|
|
* drm_device::context_wait.
|
|
|
|
*/
|
2005-09-25 12:28:13 +08:00
|
|
|
static int drm_context_switch_complete(drm_device_t * dev, int new)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2005-09-25 12:28:13 +08:00
|
|
|
dev->last_context = new; /* PRE/POST: This is the _only_ writer. */
|
|
|
|
dev->last_switch = jiffies;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2005-09-25 12:28:13 +08:00
|
|
|
if (!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
|
|
|
|
DRM_ERROR("Lock isn't held after context switch\n");
|
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2005-09-25 12:28:13 +08:00
|
|
|
/* If a context switch is ever initiated
|
|
|
|
when the kernel holds the lock, release
|
|
|
|
that lock here. */
|
|
|
|
clear_bit(0, &dev->context_flag);
|
|
|
|
wake_up(&dev->context_wait);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2005-09-25 12:28:13 +08:00
|
|
|
return 0;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Reserve contexts.
|
|
|
|
*
|
|
|
|
* \param inode device inode.
|
|
|
|
* \param filp file pointer.
|
|
|
|
* \param cmd command.
|
|
|
|
* \param arg user argument pointing to a drm_ctx_res structure.
|
|
|
|
* \return zero on success or a negative number on failure.
|
|
|
|
*/
|
2005-09-25 12:28:13 +08:00
|
|
|
int drm_resctx(struct inode *inode, struct file *filp,
|
|
|
|
unsigned int cmd, unsigned long arg)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
drm_ctx_res_t res;
|
|
|
|
drm_ctx_t __user *argp = (void __user *)arg;
|
|
|
|
drm_ctx_t ctx;
|
|
|
|
int i;
|
|
|
|
|
2005-09-25 12:28:13 +08:00
|
|
|
if (copy_from_user(&res, argp, sizeof(res)))
|
2005-04-17 06:20:36 +08:00
|
|
|
return -EFAULT;
|
|
|
|
|
2005-09-25 12:28:13 +08:00
|
|
|
if (res.count >= DRM_RESERVED_CONTEXTS) {
|
|
|
|
memset(&ctx, 0, sizeof(ctx));
|
|
|
|
for (i = 0; i < DRM_RESERVED_CONTEXTS; i++) {
|
2005-04-17 06:20:36 +08:00
|
|
|
ctx.handle = i;
|
2005-09-25 12:28:13 +08:00
|
|
|
if (copy_to_user(&res.contexts[i], &ctx, sizeof(ctx)))
|
2005-04-17 06:20:36 +08:00
|
|
|
return -EFAULT;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
res.count = DRM_RESERVED_CONTEXTS;
|
|
|
|
|
2005-09-25 12:28:13 +08:00
|
|
|
if (copy_to_user(argp, &res, sizeof(res)))
|
2005-04-17 06:20:36 +08:00
|
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Add context.
|
|
|
|
*
|
|
|
|
* \param inode device inode.
|
|
|
|
* \param filp file pointer.
|
|
|
|
* \param cmd command.
|
|
|
|
* \param arg user argument pointing to a drm_ctx structure.
|
|
|
|
* \return zero on success or a negative number on failure.
|
|
|
|
*
|
|
|
|
* Get a new handle for the context and copy to userspace.
|
|
|
|
*/
|
2005-09-25 12:28:13 +08:00
|
|
|
int drm_addctx(struct inode *inode, struct file *filp,
|
|
|
|
unsigned int cmd, unsigned long arg)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
drm_file_t *priv = filp->private_data;
|
|
|
|
drm_device_t *dev = priv->head->dev;
|
2005-09-25 12:28:13 +08:00
|
|
|
drm_ctx_list_t *ctx_entry;
|
2005-04-17 06:20:36 +08:00
|
|
|
drm_ctx_t __user *argp = (void __user *)arg;
|
|
|
|
drm_ctx_t ctx;
|
|
|
|
|
2005-09-25 12:28:13 +08:00
|
|
|
if (copy_from_user(&ctx, argp, sizeof(ctx)))
|
2005-04-17 06:20:36 +08:00
|
|
|
return -EFAULT;
|
|
|
|
|
2005-09-25 12:28:13 +08:00
|
|
|
ctx.handle = drm_ctxbitmap_next(dev);
|
|
|
|
if (ctx.handle == DRM_KERNEL_CONTEXT) {
|
|
|
|
/* Skip kernel's context and get a new one. */
|
|
|
|
ctx.handle = drm_ctxbitmap_next(dev);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
2005-09-25 12:28:13 +08:00
|
|
|
DRM_DEBUG("%d\n", ctx.handle);
|
|
|
|
if (ctx.handle == -1) {
|
|
|
|
DRM_DEBUG("Not enough free contexts.\n");
|
|
|
|
/* Should this return -EBUSY instead? */
|
2005-04-17 06:20:36 +08:00
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
|
2005-09-25 12:28:13 +08:00
|
|
|
if (ctx.handle != DRM_KERNEL_CONTEXT) {
|
2005-04-17 06:20:36 +08:00
|
|
|
if (dev->driver->context_ctor)
|
|
|
|
dev->driver->context_ctor(dev, ctx.handle);
|
|
|
|
}
|
|
|
|
|
2005-09-25 12:28:13 +08:00
|
|
|
ctx_entry = drm_alloc(sizeof(*ctx_entry), DRM_MEM_CTXLIST);
|
|
|
|
if (!ctx_entry) {
|
2005-04-17 06:20:36 +08:00
|
|
|
DRM_DEBUG("out of memory\n");
|
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
|
2005-09-25 12:28:13 +08:00
|
|
|
INIT_LIST_HEAD(&ctx_entry->head);
|
2005-04-17 06:20:36 +08:00
|
|
|
ctx_entry->handle = ctx.handle;
|
|
|
|
ctx_entry->tag = priv;
|
|
|
|
|
2005-09-25 12:28:13 +08:00
|
|
|
down(&dev->ctxlist_sem);
|
|
|
|
list_add(&ctx_entry->head, &dev->ctxlist->head);
|
2005-04-17 06:20:36 +08:00
|
|
|
++dev->ctx_count;
|
2005-09-25 12:28:13 +08:00
|
|
|
up(&dev->ctxlist_sem);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2005-09-25 12:28:13 +08:00
|
|
|
if (copy_to_user(argp, &ctx, sizeof(ctx)))
|
2005-04-17 06:20:36 +08:00
|
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2005-09-25 12:28:13 +08:00
|
|
|
int drm_modctx(struct inode *inode, struct file *filp,
|
|
|
|
unsigned int cmd, unsigned long arg)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
/* This does nothing */
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Get context.
|
|
|
|
*
|
|
|
|
* \param inode device inode.
|
|
|
|
* \param filp file pointer.
|
|
|
|
* \param cmd command.
|
|
|
|
* \param arg user argument pointing to a drm_ctx structure.
|
|
|
|
* \return zero on success or a negative number on failure.
|
|
|
|
*/
|
2005-09-25 12:28:13 +08:00
|
|
|
int drm_getctx(struct inode *inode, struct file *filp,
|
|
|
|
unsigned int cmd, unsigned long arg)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
drm_ctx_t __user *argp = (void __user *)arg;
|
|
|
|
drm_ctx_t ctx;
|
|
|
|
|
2005-09-25 12:28:13 +08:00
|
|
|
if (copy_from_user(&ctx, argp, sizeof(ctx)))
|
2005-04-17 06:20:36 +08:00
|
|
|
return -EFAULT;
|
|
|
|
|
|
|
|
/* This is 0, because we don't handle any context flags */
|
|
|
|
ctx.flags = 0;
|
|
|
|
|
2005-09-25 12:28:13 +08:00
|
|
|
if (copy_to_user(argp, &ctx, sizeof(ctx)))
|
2005-04-17 06:20:36 +08:00
|
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Switch context.
|
|
|
|
*
|
|
|
|
* \param inode device inode.
|
|
|
|
* \param filp file pointer.
|
|
|
|
* \param cmd command.
|
|
|
|
* \param arg user argument pointing to a drm_ctx structure.
|
|
|
|
* \return zero on success or a negative number on failure.
|
|
|
|
*
|
|
|
|
* Calls context_switch().
|
|
|
|
*/
|
2005-09-25 12:28:13 +08:00
|
|
|
int drm_switchctx(struct inode *inode, struct file *filp,
|
|
|
|
unsigned int cmd, unsigned long arg)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
drm_file_t *priv = filp->private_data;
|
|
|
|
drm_device_t *dev = priv->head->dev;
|
|
|
|
drm_ctx_t ctx;
|
|
|
|
|
2005-09-25 12:28:13 +08:00
|
|
|
if (copy_from_user(&ctx, (drm_ctx_t __user *) arg, sizeof(ctx)))
|
2005-04-17 06:20:36 +08:00
|
|
|
return -EFAULT;
|
|
|
|
|
2005-09-25 12:28:13 +08:00
|
|
|
DRM_DEBUG("%d\n", ctx.handle);
|
|
|
|
return drm_context_switch(dev, dev->last_context, ctx.handle);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* New context.
|
|
|
|
*
|
|
|
|
* \param inode device inode.
|
|
|
|
* \param filp file pointer.
|
|
|
|
* \param cmd command.
|
|
|
|
* \param arg user argument pointing to a drm_ctx structure.
|
|
|
|
* \return zero on success or a negative number on failure.
|
|
|
|
*
|
|
|
|
* Calls context_switch_complete().
|
|
|
|
*/
|
2005-09-25 12:28:13 +08:00
|
|
|
int drm_newctx(struct inode *inode, struct file *filp,
|
|
|
|
unsigned int cmd, unsigned long arg)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
drm_file_t *priv = filp->private_data;
|
|
|
|
drm_device_t *dev = priv->head->dev;
|
|
|
|
drm_ctx_t ctx;
|
|
|
|
|
2005-09-25 12:28:13 +08:00
|
|
|
if (copy_from_user(&ctx, (drm_ctx_t __user *) arg, sizeof(ctx)))
|
2005-04-17 06:20:36 +08:00
|
|
|
return -EFAULT;
|
|
|
|
|
2005-09-25 12:28:13 +08:00
|
|
|
DRM_DEBUG("%d\n", ctx.handle);
|
|
|
|
drm_context_switch_complete(dev, ctx.handle);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Remove context.
|
|
|
|
*
|
|
|
|
* \param inode device inode.
|
|
|
|
* \param filp file pointer.
|
|
|
|
* \param cmd command.
|
|
|
|
* \param arg user argument pointing to a drm_ctx structure.
|
|
|
|
* \return zero on success or a negative number on failure.
|
|
|
|
*
|
|
|
|
* If not the special kernel context, calls ctxbitmap_free() to free the specified context.
|
|
|
|
*/
|
2005-09-25 12:28:13 +08:00
|
|
|
int drm_rmctx(struct inode *inode, struct file *filp,
|
|
|
|
unsigned int cmd, unsigned long arg)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
drm_file_t *priv = filp->private_data;
|
|
|
|
drm_device_t *dev = priv->head->dev;
|
|
|
|
drm_ctx_t ctx;
|
|
|
|
|
2005-09-25 12:28:13 +08:00
|
|
|
if (copy_from_user(&ctx, (drm_ctx_t __user *) arg, sizeof(ctx)))
|
2005-04-17 06:20:36 +08:00
|
|
|
return -EFAULT;
|
|
|
|
|
2005-09-25 12:28:13 +08:00
|
|
|
DRM_DEBUG("%d\n", ctx.handle);
|
|
|
|
if (ctx.handle == DRM_KERNEL_CONTEXT + 1) {
|
2005-04-17 06:20:36 +08:00
|
|
|
priv->remove_auth_on_close = 1;
|
|
|
|
}
|
2005-09-25 12:28:13 +08:00
|
|
|
if (ctx.handle != DRM_KERNEL_CONTEXT) {
|
2005-04-17 06:20:36 +08:00
|
|
|
if (dev->driver->context_dtor)
|
|
|
|
dev->driver->context_dtor(dev, ctx.handle);
|
2005-09-25 12:28:13 +08:00
|
|
|
drm_ctxbitmap_free(dev, ctx.handle);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2005-09-25 12:28:13 +08:00
|
|
|
down(&dev->ctxlist_sem);
|
|
|
|
if (!list_empty(&dev->ctxlist->head)) {
|
2005-04-17 06:20:36 +08:00
|
|
|
drm_ctx_list_t *pos, *n;
|
|
|
|
|
2005-09-25 12:28:13 +08:00
|
|
|
list_for_each_entry_safe(pos, n, &dev->ctxlist->head, head) {
|
|
|
|
if (pos->handle == ctx.handle) {
|
|
|
|
list_del(&pos->head);
|
|
|
|
drm_free(pos, sizeof(*pos), DRM_MEM_CTXLIST);
|
2005-04-17 06:20:36 +08:00
|
|
|
--dev->ctx_count;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
2005-09-25 12:28:13 +08:00
|
|
|
up(&dev->ctxlist_sem);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*@}*/
|