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Merge branch 'drm-next' of git://people.freedesktop.org/~dvdhrm/linux into drm-next

Browse Source 
bunch of cleanups
* 'drm-next' of git://people.freedesktop.org/~dvdhrm/linux:
  drm: mark drm_context support as legacy
  drm: make sysfs device always available for minors
  drm: make minor->index available early
  drm: merge drm_drv.c into drm_ioctl.c
  drm: move module initialization to drm_stub.c
  drm: don't de-authenticate clients on master-close
  drm: drop redundant drm_file->is_master
  drm: extract legacy ctxbitmap flushing
This commit is contained in:
Dave Airlie 2014-08-06 17:21:13 +10:00
commit acf8294fec
14 changed files with 724 additions and 745 deletions
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2
drivers/gpu/drm/Makefile
View File

@ -6,7 +6,7 @@ ccflags-y := -Iinclude/drm
drm-y := drm_auth.o drm_buffer.o drm_bufs.o drm_cache.o \
drm_context.o drm_dma.o \
drm_drv.o drm_fops.o drm_gem.o drm_ioctl.o drm_irq.o \
drm_fops.o drm_gem.o drm_ioctl.o drm_irq.o \
drm_lock.o drm_memory.o drm_stub.o drm_vm.o \
drm_agpsupport.o drm_scatter.o drm_pci.o \
drm_platform.o drm_sysfs.o drm_hashtab.o drm_mm.o \

102
drivers/gpu/drm/drm_context.c
View File

@ -1,18 +1,13 @@
/**
* \file drm_context.c
* IOCTLs for generic contexts
*
* \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
* Legacy: Generic DRM Contexts
*
* Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas.
* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
* All Rights Reserved.
*
* Author: Rickard E. (Rik) Faith <faith@valinux.com>
* Author: Gareth Hughes <gareth@valinux.com>
*
* 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
@ -33,14 +28,14 @@
* 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 <drm/drmP.h>
#include "drm_legacy.h"
struct drm_ctx_list {
struct list_head head;
drm_context_t handle;
struct drm_file *tag;
};
/******************************************************************/
/** \name Context bitmap support */
@ -56,7 +51,7 @@
* in drm_device::ctx_idr, while holding the drm_device::struct_mutex
* lock.
*/
void drm_ctxbitmap_free(struct drm_device * dev, int ctx_handle)
void drm_legacy_ctxbitmap_free(struct drm_device * dev, int ctx_handle)
{
mutex_lock(&dev->struct_mutex);
idr_remove(&dev->ctx_idr, ctx_handle);
@ -72,7 +67,7 @@ void drm_ctxbitmap_free(struct drm_device * dev, int ctx_handle)
* 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)
static int drm_legacy_ctxbitmap_next(struct drm_device * dev)
{
int ret;
@ -90,7 +85,7 @@ static int drm_ctxbitmap_next(struct drm_device * dev)
*
* Initialise the drm_device::ctx_idr
*/
int drm_ctxbitmap_init(struct drm_device * dev)
int drm_legacy_ctxbitmap_init(struct drm_device * dev)
{
idr_init(&dev->ctx_idr);
return 0;
@ -104,13 +99,43 @@ int drm_ctxbitmap_init(struct drm_device * dev)
* 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)
void drm_legacy_ctxbitmap_cleanup(struct drm_device * dev)
{
mutex_lock(&dev->struct_mutex);
idr_destroy(&dev->ctx_idr);
mutex_unlock(&dev->struct_mutex);
}
/**
* drm_ctxbitmap_flush() - Flush all contexts owned by a file
* @dev: DRM device to operate on
* @file: Open file to flush contexts for
*
* This iterates over all contexts on @dev and drops them if they're owned by
* @file. Note that after this call returns, new contexts might be added if
* the file is still alive.
*/
void drm_legacy_ctxbitmap_flush(struct drm_device *dev, struct drm_file *file)
{
struct drm_ctx_list *pos, *tmp;
mutex_lock(&dev->ctxlist_mutex);
list_for_each_entry_safe(pos, tmp, &dev->ctxlist, head) {
if (pos->tag == file &&
pos->handle != DRM_KERNEL_CONTEXT) {
if (dev->driver->context_dtor)
dev->driver->context_dtor(dev, pos->handle);
drm_legacy_ctxbitmap_free(dev, pos->handle);
list_del(&pos->head);
kfree(pos);
}
}
mutex_unlock(&dev->ctxlist_mutex);
}
/*@}*/
/******************************************************************/
@ -129,8 +154,8 @@ void drm_ctxbitmap_cleanup(struct drm_device * dev)
* Gets the map from drm_device::ctx_idr with the handle specified and
* returns its handle.
*/
int drm_getsareactx(struct drm_device *dev, void *data,
struct drm_file *file_priv)
int drm_legacy_getsareactx(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_ctx_priv_map *request = data;
struct drm_local_map *map;
@ -173,8 +198,8 @@ int drm_getsareactx(struct drm_device *dev, void *data,
* Searches the mapping specified in \p arg and update the entry in
* drm_device::ctx_idr with it.
*/
int drm_setsareactx(struct drm_device *dev, void *data,
struct drm_file *file_priv)
int drm_legacy_setsareactx(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_ctx_priv_map *request = data;
struct drm_local_map *map = NULL;
@ -273,8 +298,8 @@ static int drm_context_switch_complete(struct drm_device *dev,
* \param arg user argument pointing to a drm_ctx_res structure.
* \return zero on success or a negative number on failure.
*/
int drm_resctx(struct drm_device *dev, void *data,
struct drm_file *file_priv)
int drm_legacy_resctx(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_ctx_res *res = data;
struct drm_ctx ctx;
@ -304,16 +329,16 @@ int drm_resctx(struct drm_device *dev, void *data,
*
* Get a new handle for the context and copy to userspace.
*/
int drm_addctx(struct drm_device *dev, void *data,
struct drm_file *file_priv)
int drm_legacy_addctx(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_ctx_list *ctx_entry;
struct drm_ctx *ctx = data;
ctx->handle = drm_ctxbitmap_next(dev);
ctx->handle = drm_legacy_ctxbitmap_next(dev);
if (ctx->handle == DRM_KERNEL_CONTEXT) {
/* Skip kernel's context and get a new one. */
ctx->handle = drm_ctxbitmap_next(dev);
ctx->handle = drm_legacy_ctxbitmap_next(dev);
}
DRM_DEBUG("%d\n", ctx->handle);
if (ctx->handle == -1) {
@ -348,7 +373,8 @@ int drm_addctx(struct drm_device *dev, void *data,
* \param arg user argument pointing to a drm_ctx structure.
* \return zero on success or a negative number on failure.
*/
int drm_getctx(struct drm_device *dev, void *data, struct drm_file *file_priv)
int drm_legacy_getctx(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_ctx *ctx = data;
@ -369,8 +395,8 @@ int drm_getctx(struct drm_device *dev, void *data, struct drm_file *file_priv)
*
* Calls context_switch().
*/
int drm_switchctx(struct drm_device *dev, void *data,
struct drm_file *file_priv)
int drm_legacy_switchctx(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_ctx *ctx = data;
@ -389,8 +415,8 @@ int drm_switchctx(struct drm_device *dev, void *data,
*
* Calls context_switch_complete().
*/
int drm_newctx(struct drm_device *dev, void *data,
struct drm_file *file_priv)
int drm_legacy_newctx(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_ctx *ctx = data;
@ -411,8 +437,8 @@ int drm_newctx(struct drm_device *dev, void *data,
*
* If not the special kernel context, calls ctxbitmap_free() to free the specified context.
*/
int drm_rmctx(struct drm_device *dev, void *data,
struct drm_file *file_priv)
int drm_legacy_rmctx(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_ctx *ctx = data;
@ -420,7 +446,7 @@ int drm_rmctx(struct drm_device *dev, void *data,
if (ctx->handle != DRM_KERNEL_CONTEXT) {
if (dev->driver->context_dtor)
dev->driver->context_dtor(dev, ctx->handle);
drm_ctxbitmap_free(dev, ctx->handle);
drm_legacy_ctxbitmap_free(dev, ctx->handle);
}
mutex_lock(&dev->ctxlist_mutex);

2
drivers/gpu/drm/drm_crtc.c
View File

@ -3244,7 +3244,7 @@ int drm_mode_getfb(struct drm_device *dev,
r->bpp = fb->bits_per_pixel;
r->pitch = fb->pitches[0];
if (fb->funcs->create_handle) {
if (file_priv->is_master || capable(CAP_SYS_ADMIN) ||
if (drm_is_master(file_priv) || capable(CAP_SYS_ADMIN) ||
drm_is_control_client(file_priv)) {
ret = fb->funcs->create_handle(fb, file_priv,
&r->handle);

471
drivers/gpu/drm/drm_drv.c
View File

@ -1,471 +0,0 @@
/**
* \file drm_drv.c
* Generic driver template
*
* \author Rickard E. (Rik) Faith <faith@valinux.com>
* \author Gareth Hughes <gareth@valinux.com>
*
* To use this template, you must at least define the following (samples
* given for the MGA driver):
*
* \code
* #define DRIVER_AUTHOR "VA Linux Systems, Inc."
*
* #define DRIVER_NAME "mga"
* #define DRIVER_DESC "Matrox G200/G400"
* #define DRIVER_DATE "20001127"
*
* #define drm_x mga_##x
* \endcode
*/
/*
* 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.
*/
#include <linux/debugfs.h>
#include <linux/slab.h>
#include <linux/export.h>
#include <drm/drmP.h>
#include <drm/drm_core.h>
static int drm_version(struct drm_device *dev, void *data,
struct drm_file *file_priv);
#define DRM_IOCTL_DEF(ioctl, _func, _flags) \
[DRM_IOCTL_NR(ioctl)] = {.cmd = ioctl, .func = _func, .flags = _flags, .cmd_drv = 0, .name = #ioctl}
/** Ioctl table */
static const struct drm_ioctl_desc drm_ioctls[] = {
DRM_IOCTL_DEF(DRM_IOCTL_VERSION, drm_version, DRM_UNLOCKED|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF(DRM_IOCTL_GET_UNIQUE, drm_getunique, 0),
DRM_IOCTL_DEF(DRM_IOCTL_GET_MAGIC, drm_getmagic, 0),
DRM_IOCTL_DEF(DRM_IOCTL_IRQ_BUSID, drm_irq_by_busid, DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_GET_MAP, drm_getmap, DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_GET_CLIENT, drm_getclient, DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_GET_STATS, drm_getstats, DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_GET_CAP, drm_getcap, DRM_UNLOCKED|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF(DRM_IOCTL_SET_CLIENT_CAP, drm_setclientcap, 0),
DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_MASTER),
DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE, drm_setunique, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_BLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_UNBLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_AUTH_MAGIC, drm_authmagic, DRM_AUTH|DRM_MASTER),
DRM_IOCTL_DEF(DRM_IOCTL_ADD_MAP, drm_addmap_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_RM_MAP, drm_rmmap_ioctl, DRM_AUTH),
DRM_IOCTL_DEF(DRM_IOCTL_SET_SAREA_CTX, drm_setsareactx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_GET_SAREA_CTX, drm_getsareactx, DRM_AUTH),
DRM_IOCTL_DEF(DRM_IOCTL_SET_MASTER, drm_setmaster_ioctl, DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_DROP_MASTER, drm_dropmaster_ioctl, DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_ADD_CTX, drm_addctx, DRM_AUTH|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_RM_CTX, drm_rmctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_MOD_CTX, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_GET_CTX, drm_getctx, DRM_AUTH),
DRM_IOCTL_DEF(DRM_IOCTL_SWITCH_CTX, drm_switchctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_NEW_CTX, drm_newctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_RES_CTX, drm_resctx, DRM_AUTH),
DRM_IOCTL_DEF(DRM_IOCTL_ADD_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_RM_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_LOCK, drm_lock, DRM_AUTH),
DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK, drm_unlock, DRM_AUTH),
DRM_IOCTL_DEF(DRM_IOCTL_FINISH, drm_noop, DRM_AUTH),
DRM_IOCTL_DEF(DRM_IOCTL_ADD_BUFS, drm_addbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_MARK_BUFS, drm_markbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS, drm_infobufs, DRM_AUTH),
DRM_IOCTL_DEF(DRM_IOCTL_MAP_BUFS, drm_mapbufs, DRM_AUTH),
DRM_IOCTL_DEF(DRM_IOCTL_FREE_BUFS, drm_freebufs, DRM_AUTH),
DRM_IOCTL_DEF(DRM_IOCTL_DMA, drm_dma_ioctl, DRM_AUTH),
DRM_IOCTL_DEF(DRM_IOCTL_CONTROL, drm_control, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
#if __OS_HAS_AGP
DRM_IOCTL_DEF(DRM_IOCTL_AGP_ACQUIRE, drm_agp_acquire_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_AGP_RELEASE, drm_agp_release_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_AGP_ENABLE, drm_agp_enable_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_AGP_INFO, drm_agp_info_ioctl, DRM_AUTH),
DRM_IOCTL_DEF(DRM_IOCTL_AGP_ALLOC, drm_agp_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_AGP_FREE, drm_agp_free_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_AGP_BIND, drm_agp_bind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_AGP_UNBIND, drm_agp_unbind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
#endif
DRM_IOCTL_DEF(DRM_IOCTL_SG_ALLOC, drm_sg_alloc, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_SG_FREE, drm_sg_free, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_WAIT_VBLANK, drm_wait_vblank, DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODESET_CTL, drm_modeset_ctl, 0),
DRM_IOCTL_DEF(DRM_IOCTL_UPDATE_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_GEM_CLOSE, drm_gem_close_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF(DRM_IOCTL_GEM_FLINK, drm_gem_flink_ioctl, DRM_AUTH|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_GEM_OPEN, drm_gem_open_ioctl, DRM_AUTH|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETRESOURCES, drm_mode_getresources, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_PRIME_HANDLE_TO_FD, drm_prime_handle_to_fd_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF(DRM_IOCTL_PRIME_FD_TO_HANDLE, drm_prime_fd_to_handle_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANERESOURCES, drm_mode_getplane_res, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCRTC, drm_mode_getcrtc, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETCRTC, drm_mode_setcrtc, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANE, drm_mode_getplane, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPLANE, drm_mode_setplane, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR, drm_mode_cursor_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETGAMMA, drm_mode_gamma_get_ioctl, DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETGAMMA, drm_mode_gamma_set_ioctl, DRM_MASTER|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETENCODER, drm_mode_getencoder, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCONNECTOR, drm_mode_getconnector, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATTACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_DETACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPERTY, drm_mode_getproperty_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPROPERTY, drm_mode_connector_property_set_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPBLOB, drm_mode_getblob_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETFB, drm_mode_getfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB, drm_mode_addfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB2, drm_mode_addfb2, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_RMFB, drm_mode_rmfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_PAGE_FLIP, drm_mode_page_flip_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_DIRTYFB, drm_mode_dirtyfb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATE_DUMB, drm_mode_create_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_MAP_DUMB, drm_mode_mmap_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_DESTROY_DUMB, drm_mode_destroy_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_GETPROPERTIES, drm_mode_obj_get_properties_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_SETPROPERTY, drm_mode_obj_set_property_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR2, drm_mode_cursor2_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
};
#define DRM_CORE_IOCTL_COUNT ARRAY_SIZE( drm_ioctls )
/** File operations structure */
static const struct file_operations drm_stub_fops = {
.owner = THIS_MODULE,
.open = drm_stub_open,
.llseek = noop_llseek,
};
static int __init drm_core_init(void)
{
int ret = -ENOMEM;
drm_global_init();
drm_connector_ida_init();
idr_init(&drm_minors_idr);
if (register_chrdev(DRM_MAJOR, "drm", &drm_stub_fops))
goto err_p1;
drm_class = drm_sysfs_create(THIS_MODULE, "drm");
if (IS_ERR(drm_class)) {
printk(KERN_ERR "DRM: Error creating drm class.\n");
ret = PTR_ERR(drm_class);
goto err_p2;
}
drm_debugfs_root = debugfs_create_dir("dri", NULL);
if (!drm_debugfs_root) {
DRM_ERROR("Cannot create /sys/kernel/debug/dri\n");
ret = -1;
goto err_p3;
}
DRM_INFO("Initialized %s %d.%d.%d %s\n",
CORE_NAME, CORE_MAJOR, CORE_MINOR, CORE_PATCHLEVEL, CORE_DATE);
return 0;
err_p3:
drm_sysfs_destroy();
err_p2:
unregister_chrdev(DRM_MAJOR, "drm");
idr_destroy(&drm_minors_idr);
err_p1:
return ret;
}
static void __exit drm_core_exit(void)
{
debugfs_remove(drm_debugfs_root);
drm_sysfs_destroy();
unregister_chrdev(DRM_MAJOR, "drm");
drm_connector_ida_destroy();
idr_destroy(&drm_minors_idr);
}
module_init(drm_core_init);
module_exit(drm_core_exit);
/**
* Copy and IOCTL return string to user space
*/
static int drm_copy_field(char __user *buf, size_t *buf_len, const char *value)
{
int len;
/* don't overflow userbuf */
len = strlen(value);
if (len > *buf_len)
len = *buf_len;
/* let userspace know exact length of driver value (which could be
* larger than the userspace-supplied buffer) */
*buf_len = strlen(value);
/* finally, try filling in the userbuf */
if (len && buf)
if (copy_to_user(buf, value, len))
return -EFAULT;
return 0;
}
/**
* Get version information
*
* \param inode device inode.
* \param filp file pointer.
* \param cmd command.
* \param arg user argument, pointing to a drm_version structure.
* \return zero on success or negative number on failure.
*
* Fills in the version information in \p arg.
*/
static int drm_version(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_version *version = data;
int err;
version->version_major = dev->driver->major;
version->version_minor = dev->driver->minor;
version->version_patchlevel = dev->driver->patchlevel;
err = drm_copy_field(version->name, &version->name_len,
dev->driver->name);
if (!err)
err = drm_copy_field(version->date, &version->date_len,
dev->driver->date);
if (!err)
err = drm_copy_field(version->desc, &version->desc_len,
dev->driver->desc);
return err;
}
/**
* drm_ioctl_permit - Check ioctl permissions against caller
*
* @flags: ioctl permission flags.
* @file_priv: Pointer to struct drm_file identifying the caller.
*
* Checks whether the caller is allowed to run an ioctl with the
* indicated permissions. If so, returns zero. Otherwise returns an
* error code suitable for ioctl return.
*/
static int drm_ioctl_permit(u32 flags, struct drm_file *file_priv)
{
/* ROOT_ONLY is only for CAP_SYS_ADMIN */
if (unlikely((flags & DRM_ROOT_ONLY) && !capable(CAP_SYS_ADMIN)))
return -EACCES;
/* AUTH is only for authenticated or render client */
if (unlikely((flags & DRM_AUTH) && !drm_is_render_client(file_priv) &&
!file_priv->authenticated))
return -EACCES;
/* MASTER is only for master or control clients */
if (unlikely((flags & DRM_MASTER) && !file_priv->is_master &&
!drm_is_control_client(file_priv)))
return -EACCES;
/* Control clients must be explicitly allowed */
if (unlikely(!(flags & DRM_CONTROL_ALLOW) &&
drm_is_control_client(file_priv)))
return -EACCES;
/* Render clients must be explicitly allowed */
if (unlikely(!(flags & DRM_RENDER_ALLOW) &&
drm_is_render_client(file_priv)))
return -EACCES;
return 0;
}
/**
* Called whenever a process performs an ioctl on /dev/drm.
*
* \param inode device inode.
* \param file_priv DRM file private.
* \param cmd command.
* \param arg user argument.
* \return zero on success or negative number on failure.
*
* Looks up the ioctl function in the ::ioctls table, checking for root
* previleges if so required, and dispatches to the respective function.
*/
long drm_ioctl(struct file *filp,
unsigned int cmd, unsigned long arg)
{
struct drm_file *file_priv = filp->private_data;
struct drm_device *dev;
const struct drm_ioctl_desc *ioctl = NULL;
drm_ioctl_t *func;
unsigned int nr = DRM_IOCTL_NR(cmd);
int retcode = -EINVAL;
char stack_kdata[128];
char *kdata = NULL;
unsigned int usize, asize;
dev = file_priv->minor->dev;
if (drm_device_is_unplugged(dev))
return -ENODEV;
if ((nr >= DRM_CORE_IOCTL_COUNT) &&
((nr < DRM_COMMAND_BASE) || (nr >= DRM_COMMAND_END)))
goto err_i1;
if ((nr >= DRM_COMMAND_BASE) && (nr < DRM_COMMAND_END) &&
(nr < DRM_COMMAND_BASE + dev->driver->num_ioctls)) {
u32 drv_size;
ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE];
drv_size = _IOC_SIZE(ioctl->cmd_drv);
usize = asize = _IOC_SIZE(cmd);
if (drv_size > asize)
asize = drv_size;
cmd = ioctl->cmd_drv;
}
else if ((nr >= DRM_COMMAND_END) || (nr < DRM_COMMAND_BASE)) {
u32 drv_size;
ioctl = &drm_ioctls[nr];
drv_size = _IOC_SIZE(ioctl->cmd);
usize = asize = _IOC_SIZE(cmd);
if (drv_size > asize)
asize = drv_size;
cmd = ioctl->cmd;
} else
goto err_i1;
DRM_DEBUG("pid=%d, dev=0x%lx, auth=%d, %s\n",
task_pid_nr(current),
(long)old_encode_dev(file_priv->minor->kdev->devt),
file_priv->authenticated, ioctl->name);
/* Do not trust userspace, use our own definition */
func = ioctl->func;
if (unlikely(!func)) {
DRM_DEBUG("no function\n");
retcode = -EINVAL;
goto err_i1;
}
retcode = drm_ioctl_permit(ioctl->flags, file_priv);
if (unlikely(retcode))
goto err_i1;
if (cmd & (IOC_IN | IOC_OUT)) {
if (asize <= sizeof(stack_kdata)) {
kdata = stack_kdata;
} else {
kdata = kmalloc(asize, GFP_KERNEL);
if (!kdata) {
retcode = -ENOMEM;
goto err_i1;
}
}
if (asize > usize)
memset(kdata + usize, 0, asize - usize);
}
if (cmd & IOC_IN) {
if (copy_from_user(kdata, (void __user *)arg,
usize) != 0) {
retcode = -EFAULT;
goto err_i1;
}
} else if (cmd & IOC_OUT) {
memset(kdata, 0, usize);
}
if (ioctl->flags & DRM_UNLOCKED)
retcode = func(dev, kdata, file_priv);
else {
mutex_lock(&drm_global_mutex);
retcode = func(dev, kdata, file_priv);
mutex_unlock(&drm_global_mutex);
}
if (cmd & IOC_OUT) {
if (copy_to_user((void __user *)arg, kdata,
usize) != 0)
retcode = -EFAULT;
}
err_i1:
if (!ioctl)
DRM_DEBUG("invalid ioctl: pid=%d, dev=0x%lx, auth=%d, cmd=0x%02x, nr=0x%02x\n",
task_pid_nr(current),
(long)old_encode_dev(file_priv->minor->kdev->devt),
file_priv->authenticated, cmd, nr);
if (kdata != stack_kdata)
kfree(kdata);
if (retcode)
DRM_DEBUG("ret = %d\n", retcode);
return retcode;
}
EXPORT_SYMBOL(drm_ioctl);
/**
* drm_ioctl_flags - Check for core ioctl and return ioctl permission flags
*
* @nr: Ioctl number.
* @flags: Where to return the ioctl permission flags
*/
bool drm_ioctl_flags(unsigned int nr, unsigned int *flags)
{
if ((nr >= DRM_COMMAND_END && nr < DRM_CORE_IOCTL_COUNT) ||
(nr < DRM_COMMAND_BASE)) {
*flags = drm_ioctls[nr].flags;
return true;
}
return false;
}
EXPORT_SYMBOL(drm_ioctl_flags);

77
drivers/gpu/drm/drm_fops.c
View File

@ -38,6 +38,7 @@
#include <linux/poll.h>
#include <linux/slab.h>
#include <linux/module.h>
#include "drm_legacy.h"
/* from BKL pushdown */
DEFINE_MUTEX(drm_global_mutex);
@ -111,45 +112,6 @@ int drm_open(struct inode *inode, struct file *filp)
}
EXPORT_SYMBOL(drm_open);
/**
* File \c open operation.
*
* \param inode device inode.
* \param filp file pointer.
*
* Puts the dev->fops corresponding to the device minor number into
* \p filp, call the \c open method, and restore the file operations.
*/
int drm_stub_open(struct inode *inode, struct file *filp)
{
struct drm_device *dev;
struct drm_minor *minor;
int err = -ENODEV;
const struct file_operations *new_fops;
DRM_DEBUG("\n");
mutex_lock(&drm_global_mutex);
minor = drm_minor_acquire(iminor(inode));
if (IS_ERR(minor))
goto out_unlock;
dev = minor->dev;
new_fops = fops_get(dev->driver->fops);
if (!new_fops)
goto out_release;
replace_fops(filp, new_fops);
if (filp->f_op->open)
err = filp->f_op->open(inode, filp);
out_release:
drm_minor_release(minor);
out_unlock:
mutex_unlock(&drm_global_mutex);
return err;
}
/**
* Check whether DRI will run on this CPU.
*
@ -199,8 +161,7 @@ static int drm_open_helper(struct file *filp, struct drm_minor *minor)
priv->minor = minor;
/* for compatibility root is always authenticated */
priv->always_authenticated = capable(CAP_SYS_ADMIN);
priv->authenticated = priv->always_authenticated;
priv->authenticated = capable(CAP_SYS_ADMIN);
priv->lock_count = 0;
INIT_LIST_HEAD(&priv->lhead);
@ -233,7 +194,6 @@ static int drm_open_helper(struct file *filp, struct drm_minor *minor)
goto out_close;
}
priv->is_master = 1;
/* take another reference for the copy in the local file priv */
priv->master = drm_master_get(priv->minor->master);
priv->authenticated = 1;
@ -461,44 +421,18 @@ int drm_release(struct inode *inode, struct file *filp)
if (dev->driver->driver_features & DRIVER_GEM)
drm_gem_release(dev, file_priv);
mutex_lock(&dev->ctxlist_mutex);
if (!list_empty(&dev->ctxlist)) {
struct drm_ctx_list *pos, *n;
list_for_each_entry_safe(pos, n, &dev->ctxlist, head) {
if (pos->tag == file_priv &&
pos->handle != DRM_KERNEL_CONTEXT) {
if (dev->driver->context_dtor)
dev->driver->context_dtor(dev,
pos->handle);
drm_ctxbitmap_free(dev, pos->handle);
list_del(&pos->head);
kfree(pos);
}
}
}
mutex_unlock(&dev->ctxlist_mutex);
drm_legacy_ctxbitmap_flush(dev, file_priv);
mutex_lock(&dev->master_mutex);
if (file_priv->is_master) {
if (drm_is_master(file_priv)) {
struct drm_master *master = file_priv->master;
struct drm_file *temp;
mutex_lock(&dev->struct_mutex);
list_for_each_entry(temp, &dev->filelist, lhead) {
if ((temp->master == file_priv->master) &&
(temp != file_priv))
temp->authenticated = temp->always_authenticated;
}
/**
* Since the master is disappearing, so is the
* possibility to lock.
*/
mutex_lock(&dev->struct_mutex);
if (master->lock.hw_lock) {
if (dev->sigdata.lock == master->lock.hw_lock)
dev->sigdata.lock = NULL;
@ -519,7 +453,6 @@ int drm_release(struct inode *inode, struct file *filp)
/* drop the master reference held by the file priv */
if (file_priv->master)
drm_master_put(&file_priv->master);
file_priv->is_master = 0;
mutex_unlock(&dev->master_mutex);
if (dev->driver->postclose)

370
drivers/gpu/drm/drm_ioctl.c
View File

@ -1,11 +1,3 @@
/**
* \file drm_ioctl.c
* IOCTL processing for DRM
*
* \author Rickard E. (Rik) Faith <faith@valinux.com>
* \author Gareth Hughes <gareth@valinux.com>
*/
/*
* Created: Fri Jan 8 09:01:26 1999 by faith@valinux.com
*
@ -13,6 +5,9 @@
* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
* All Rights Reserved.
*
* Author Rickard E. (Rik) Faith <faith@valinux.com>
* Author Gareth Hughes <gareth@valinux.com>
*
* 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
@ -35,6 +30,7 @@
#include <drm/drmP.h>
#include <drm/drm_core.h>
#include "drm_legacy.h"
#include <linux/pci.h>
#include <linux/export.h>
@ -42,6 +38,124 @@
#include <asm/mtrr.h>
#endif
static int drm_version(struct drm_device *dev, void *data,
struct drm_file *file_priv);
#define DRM_IOCTL_DEF(ioctl, _func, _flags) \
[DRM_IOCTL_NR(ioctl)] = {.cmd = ioctl, .func = _func, .flags = _flags, .cmd_drv = 0, .name = #ioctl}
/** Ioctl table */
static const struct drm_ioctl_desc drm_ioctls[] = {
DRM_IOCTL_DEF(DRM_IOCTL_VERSION, drm_version, DRM_UNLOCKED|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF(DRM_IOCTL_GET_UNIQUE, drm_getunique, 0),
DRM_IOCTL_DEF(DRM_IOCTL_GET_MAGIC, drm_getmagic, 0),
DRM_IOCTL_DEF(DRM_IOCTL_IRQ_BUSID, drm_irq_by_busid, DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_GET_MAP, drm_getmap, DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_GET_CLIENT, drm_getclient, DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_GET_STATS, drm_getstats, DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_GET_CAP, drm_getcap, DRM_UNLOCKED|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF(DRM_IOCTL_SET_CLIENT_CAP, drm_setclientcap, 0),
DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_MASTER),
DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE, drm_setunique, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_BLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_UNBLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_AUTH_MAGIC, drm_authmagic, DRM_AUTH|DRM_MASTER),
DRM_IOCTL_DEF(DRM_IOCTL_ADD_MAP, drm_addmap_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_RM_MAP, drm_rmmap_ioctl, DRM_AUTH),
DRM_IOCTL_DEF(DRM_IOCTL_SET_SAREA_CTX, drm_legacy_setsareactx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_GET_SAREA_CTX, drm_legacy_getsareactx, DRM_AUTH),
DRM_IOCTL_DEF(DRM_IOCTL_SET_MASTER, drm_setmaster_ioctl, DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_DROP_MASTER, drm_dropmaster_ioctl, DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_ADD_CTX, drm_legacy_addctx, DRM_AUTH|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_RM_CTX, drm_legacy_rmctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_MOD_CTX, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_GET_CTX, drm_legacy_getctx, DRM_AUTH),
DRM_IOCTL_DEF(DRM_IOCTL_SWITCH_CTX, drm_legacy_switchctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_NEW_CTX, drm_legacy_newctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_RES_CTX, drm_legacy_resctx, DRM_AUTH),
DRM_IOCTL_DEF(DRM_IOCTL_ADD_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_RM_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_LOCK, drm_lock, DRM_AUTH),
DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK, drm_unlock, DRM_AUTH),
DRM_IOCTL_DEF(DRM_IOCTL_FINISH, drm_noop, DRM_AUTH),
DRM_IOCTL_DEF(DRM_IOCTL_ADD_BUFS, drm_addbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_MARK_BUFS, drm_markbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS, drm_infobufs, DRM_AUTH),
DRM_IOCTL_DEF(DRM_IOCTL_MAP_BUFS, drm_mapbufs, DRM_AUTH),
DRM_IOCTL_DEF(DRM_IOCTL_FREE_BUFS, drm_freebufs, DRM_AUTH),
DRM_IOCTL_DEF(DRM_IOCTL_DMA, drm_dma_ioctl, DRM_AUTH),
DRM_IOCTL_DEF(DRM_IOCTL_CONTROL, drm_control, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
#if __OS_HAS_AGP
DRM_IOCTL_DEF(DRM_IOCTL_AGP_ACQUIRE, drm_agp_acquire_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_AGP_RELEASE, drm_agp_release_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_AGP_ENABLE, drm_agp_enable_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_AGP_INFO, drm_agp_info_ioctl, DRM_AUTH),
DRM_IOCTL_DEF(DRM_IOCTL_AGP_ALLOC, drm_agp_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_AGP_FREE, drm_agp_free_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_AGP_BIND, drm_agp_bind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_AGP_UNBIND, drm_agp_unbind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
#endif
DRM_IOCTL_DEF(DRM_IOCTL_SG_ALLOC, drm_sg_alloc, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_SG_FREE, drm_sg_free, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_WAIT_VBLANK, drm_wait_vblank, DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODESET_CTL, drm_modeset_ctl, 0),
DRM_IOCTL_DEF(DRM_IOCTL_UPDATE_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_GEM_CLOSE, drm_gem_close_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF(DRM_IOCTL_GEM_FLINK, drm_gem_flink_ioctl, DRM_AUTH|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_GEM_OPEN, drm_gem_open_ioctl, DRM_AUTH|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETRESOURCES, drm_mode_getresources, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_PRIME_HANDLE_TO_FD, drm_prime_handle_to_fd_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF(DRM_IOCTL_PRIME_FD_TO_HANDLE, drm_prime_fd_to_handle_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANERESOURCES, drm_mode_getplane_res, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCRTC, drm_mode_getcrtc, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETCRTC, drm_mode_setcrtc, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANE, drm_mode_getplane, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPLANE, drm_mode_setplane, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR, drm_mode_cursor_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETGAMMA, drm_mode_gamma_get_ioctl, DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETGAMMA, drm_mode_gamma_set_ioctl, DRM_MASTER|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETENCODER, drm_mode_getencoder, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCONNECTOR, drm_mode_getconnector, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATTACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_DETACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPERTY, drm_mode_getproperty_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPROPERTY, drm_mode_connector_property_set_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPBLOB, drm_mode_getblob_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETFB, drm_mode_getfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB, drm_mode_addfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB2, drm_mode_addfb2, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_RMFB, drm_mode_rmfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_PAGE_FLIP, drm_mode_page_flip_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_DIRTYFB, drm_mode_dirtyfb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATE_DUMB, drm_mode_create_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_MAP_DUMB, drm_mode_mmap_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_DESTROY_DUMB, drm_mode_destroy_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_GETPROPERTIES, drm_mode_obj_get_properties_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_SETPROPERTY, drm_mode_obj_set_property_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR2, drm_mode_cursor2_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
};
#define DRM_CORE_IOCTL_COUNT ARRAY_SIZE( drm_ioctls )
/**
* Get the bus id.
*
@ -415,3 +529,243 @@ int drm_noop(struct drm_device *dev, void *data,
return 0;
}
EXPORT_SYMBOL(drm_noop);
/**
* Copy and IOCTL return string to user space
*/
static int drm_copy_field(char __user *buf, size_t *buf_len, const char *value)
{
int len;
/* don't overflow userbuf */
len = strlen(value);
if (len > *buf_len)
len = *buf_len;
/* let userspace know exact length of driver value (which could be
* larger than the userspace-supplied buffer) */
*buf_len = strlen(value);
/* finally, try filling in the userbuf */
if (len && buf)
if (copy_to_user(buf, value, len))
return -EFAULT;
return 0;
}
/**
* Get version information
*
* \param inode device inode.
* \param filp file pointer.
* \param cmd command.
* \param arg user argument, pointing to a drm_version structure.
* \return zero on success or negative number on failure.
*
* Fills in the version information in \p arg.
*/
static int drm_version(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_version *version = data;
int err;
version->version_major = dev->driver->major;
version->version_minor = dev->driver->minor;
version->version_patchlevel = dev->driver->patchlevel;
err = drm_copy_field(version->name, &version->name_len,
dev->driver->name);
if (!err)
err = drm_copy_field(version->date, &version->date_len,
dev->driver->date);
if (!err)
err = drm_copy_field(version->desc, &version->desc_len,
dev->driver->desc);
return err;
}
/**
* drm_ioctl_permit - Check ioctl permissions against caller
*
* @flags: ioctl permission flags.
* @file_priv: Pointer to struct drm_file identifying the caller.
*
* Checks whether the caller is allowed to run an ioctl with the
* indicated permissions. If so, returns zero. Otherwise returns an
* error code suitable for ioctl return.
*/
static int drm_ioctl_permit(u32 flags, struct drm_file *file_priv)
{
/* ROOT_ONLY is only for CAP_SYS_ADMIN */
if (unlikely((flags & DRM_ROOT_ONLY) && !capable(CAP_SYS_ADMIN)))
return -EACCES;
/* AUTH is only for authenticated or render client */
if (unlikely((flags & DRM_AUTH) && !drm_is_render_client(file_priv) &&
!file_priv->authenticated))
return -EACCES;
/* MASTER is only for master or control clients */
if (unlikely((flags & DRM_MASTER) && !drm_is_master(file_priv) &&
!drm_is_control_client(file_priv)))
return -EACCES;
/* Control clients must be explicitly allowed */
if (unlikely(!(flags & DRM_CONTROL_ALLOW) &&
drm_is_control_client(file_priv)))
return -EACCES;
/* Render clients must be explicitly allowed */
if (unlikely(!(flags & DRM_RENDER_ALLOW) &&
drm_is_render_client(file_priv)))
return -EACCES;
return 0;
}
/**
* Called whenever a process performs an ioctl on /dev/drm.
*
* \param inode device inode.
* \param file_priv DRM file private.
* \param cmd command.
* \param arg user argument.
* \return zero on success or negative number on failure.
*
* Looks up the ioctl function in the ::ioctls table, checking for root
* previleges if so required, and dispatches to the respective function.
*/
long drm_ioctl(struct file *filp,
unsigned int cmd, unsigned long arg)
{
struct drm_file *file_priv = filp->private_data;
struct drm_device *dev;
const struct drm_ioctl_desc *ioctl = NULL;
drm_ioctl_t *func;
unsigned int nr = DRM_IOCTL_NR(cmd);
int retcode = -EINVAL;
char stack_kdata[128];
char *kdata = NULL;
unsigned int usize, asize;
dev = file_priv->minor->dev;
if (drm_device_is_unplugged(dev))
return -ENODEV;
if ((nr >= DRM_CORE_IOCTL_COUNT) &&
((nr < DRM_COMMAND_BASE) || (nr >= DRM_COMMAND_END)))
goto err_i1;
if ((nr >= DRM_COMMAND_BASE) && (nr < DRM_COMMAND_END) &&
(nr < DRM_COMMAND_BASE + dev->driver->num_ioctls)) {
u32 drv_size;
ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE];
drv_size = _IOC_SIZE(ioctl->cmd_drv);
usize = asize = _IOC_SIZE(cmd);
if (drv_size > asize)
asize = drv_size;
cmd = ioctl->cmd_drv;
}
else if ((nr >= DRM_COMMAND_END) || (nr < DRM_COMMAND_BASE)) {
u32 drv_size;
ioctl = &drm_ioctls[nr];
drv_size = _IOC_SIZE(ioctl->cmd);
usize = asize = _IOC_SIZE(cmd);
if (drv_size > asize)
asize = drv_size;
cmd = ioctl->cmd;
} else
goto err_i1;
DRM_DEBUG("pid=%d, dev=0x%lx, auth=%d, %s\n",
task_pid_nr(current),
(long)old_encode_dev(file_priv->minor->kdev->devt),
file_priv->authenticated, ioctl->name);
/* Do not trust userspace, use our own definition */
func = ioctl->func;
if (unlikely(!func)) {
DRM_DEBUG("no function\n");
retcode = -EINVAL;
goto err_i1;
}
retcode = drm_ioctl_permit(ioctl->flags, file_priv);
if (unlikely(retcode))
goto err_i1;
if (cmd & (IOC_IN | IOC_OUT)) {
if (asize <= sizeof(stack_kdata)) {
kdata = stack_kdata;
} else {
kdata = kmalloc(asize, GFP_KERNEL);
if (!kdata) {
retcode = -ENOMEM;
goto err_i1;
}
}
if (asize > usize)
memset(kdata + usize, 0, asize - usize);
}
if (cmd & IOC_IN) {
if (copy_from_user(kdata, (void __user *)arg,
usize) != 0) {
retcode = -EFAULT;
goto err_i1;
}
} else if (cmd & IOC_OUT) {
memset(kdata, 0, usize);
}
if (ioctl->flags & DRM_UNLOCKED)
retcode = func(dev, kdata, file_priv);
else {
mutex_lock(&drm_global_mutex);
retcode = func(dev, kdata, file_priv);
mutex_unlock(&drm_global_mutex);
}
if (cmd & IOC_OUT) {
if (copy_to_user((void __user *)arg, kdata,
usize) != 0)
retcode = -EFAULT;
}
err_i1:
if (!ioctl)
DRM_DEBUG("invalid ioctl: pid=%d, dev=0x%lx, auth=%d, cmd=0x%02x, nr=0x%02x\n",
task_pid_nr(current),
(long)old_encode_dev(file_priv->minor->kdev->devt),
file_priv->authenticated, cmd, nr);
if (kdata != stack_kdata)
kfree(kdata);
if (retcode)
DRM_DEBUG("ret = %d\n", retcode);
return retcode;
}
EXPORT_SYMBOL(drm_ioctl);
/**
* drm_ioctl_flags - Check for core ioctl and return ioctl permission flags
*
* @nr: Ioctl number.
* @flags: Where to return the ioctl permission flags
*/
bool drm_ioctl_flags(unsigned int nr, unsigned int *flags)
{
if ((nr >= DRM_COMMAND_END && nr < DRM_CORE_IOCTL_COUNT) ||
(nr < DRM_COMMAND_BASE)) {
*flags = drm_ioctls[nr].flags;
return true;
}
return false;
}
EXPORT_SYMBOL(drm_ioctl_flags);

51
drivers/gpu/drm/drm_legacy.h Normal file
View File

@ -0,0 +1,51 @@
#ifndef __DRM_LEGACY_H__
#define __DRM_LEGACY_H__
/*
* Copyright (c) 2014 David Herrmann <dh.herrmann@gmail.com>
*
* 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 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
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
*/
struct drm_device;
struct drm_file;
/*
* Generic DRM Contexts
*/
#define DRM_KERNEL_CONTEXT 0
#define DRM_RESERVED_CONTEXTS 1
int drm_legacy_ctxbitmap_init(struct drm_device *dev);
void drm_legacy_ctxbitmap_cleanup(struct drm_device *dev);
void drm_legacy_ctxbitmap_free(struct drm_device *dev, int ctx_handle);
void drm_legacy_ctxbitmap_flush(struct drm_device *dev, struct drm_file *file);
int drm_legacy_resctx(struct drm_device *d, void *v, struct drm_file *f);
int drm_legacy_addctx(struct drm_device *d, void *v, struct drm_file *f);
int drm_legacy_getctx(struct drm_device *d, void *v, struct drm_file *f);
int drm_legacy_switchctx(struct drm_device *d, void *v, struct drm_file *f);
int drm_legacy_newctx(struct drm_device *d, void *v, struct drm_file *f);
int drm_legacy_rmctx(struct drm_device *d, void *v, struct drm_file *f);
int drm_legacy_setsareactx(struct drm_device *d, void *v, struct drm_file *f);
int drm_legacy_getsareactx(struct drm_device *d, void *v, struct drm_file *f);
#endif /* __DRM_LEGACY_H__ */

3
drivers/gpu/drm/drm_lock.c
View File

@ -35,6 +35,7 @@
#include <linux/export.h>
#include <drm/drmP.h>
#include "drm_legacy.h"
static int drm_notifier(void *priv);
@ -111,7 +112,7 @@ int drm_lock(struct drm_device *dev, void *data, struct drm_file *file_priv)
/* don't set the block all signals on the master process for now
* really probably not the correct answer but lets us debug xkb
* xserver for now */
if (!file_priv->is_master) {
if (!drm_is_master(file_priv)) {
sigemptyset(&dev->sigmask);
sigaddset(&dev->sigmask, SIGSTOP);
sigaddset(&dev->sigmask, SIGTSTP);

238
drivers/gpu/drm/drm_stub.c
View File

@ -26,6 +26,7 @@
* DEALINGS IN THE SOFTWARE.
*/
#include <linux/debugfs.h>
#include <linux/fs.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
@ -33,6 +34,7 @@
#include <linux/slab.h>
#include <drm/drmP.h>
#include <drm/drm_core.h>
#include "drm_legacy.h"
unsigned int drm_debug = 0; /* 1 to enable debug output */
EXPORT_SYMBOL(drm_debug);
@ -61,10 +63,10 @@ module_param_named(timestamp_precision_usec, drm_timestamp_precision, int, 0600)
module_param_named(timestamp_monotonic, drm_timestamp_monotonic, int, 0600);
static DEFINE_SPINLOCK(drm_minor_lock);
struct idr drm_minors_idr;
static struct idr drm_minors_idr;
struct class *drm_class;
struct dentry *drm_debugfs_root;
static struct dentry *drm_debugfs_root;
int drm_err(const char *func, const char *format, ...)
{
@ -177,7 +179,7 @@ int drm_setmaster_ioctl(struct drm_device *dev, void *data,
int ret = 0;
mutex_lock(&dev->master_mutex);
if (file_priv->is_master)
if (drm_is_master(file_priv))
goto out_unlock;
if (file_priv->minor->master) {
@ -191,13 +193,10 @@ int drm_setmaster_ioctl(struct drm_device *dev, void *data,
}
file_priv->minor->master = drm_master_get(file_priv->master);
file_priv->is_master = 1;
if (dev->driver->master_set) {
ret = dev->driver->master_set(dev, file_priv, false);
if (unlikely(ret != 0)) {
file_priv->is_master = 0;
if (unlikely(ret != 0))
drm_master_put(&file_priv->minor->master);
}
}
out_unlock:
@ -211,7 +210,7 @@ int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
int ret = -EINVAL;
mutex_lock(&dev->master_mutex);
if (!file_priv->is_master)
if (!drm_is_master(file_priv))
goto out_unlock;
if (!file_priv->minor->master)
@ -221,7 +220,6 @@ int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
if (dev->driver->master_drop)
dev->driver->master_drop(dev, file_priv, false);
drm_master_put(&file_priv->minor->master);
file_priv->is_master = 0;
out_unlock:
mutex_unlock(&dev->master_mutex);
@ -259,6 +257,8 @@ static struct drm_minor **drm_minor_get_slot(struct drm_device *dev,
static int drm_minor_alloc(struct drm_device *dev, unsigned int type)
{
struct drm_minor *minor;
unsigned long flags;
int r;
minor = kzalloc(sizeof(*minor), GFP_KERNEL);
if (!minor)
@ -267,77 +267,92 @@ static int drm_minor_alloc(struct drm_device *dev, unsigned int type)
minor->type = type;
minor->dev = dev;
idr_preload(GFP_KERNEL);
spin_lock_irqsave(&drm_minor_lock, flags);
r = idr_alloc(&drm_minors_idr,
NULL,
64 * type,
64 * (type + 1),
GFP_NOWAIT);
spin_unlock_irqrestore(&drm_minor_lock, flags);
idr_preload_end();
if (r < 0)
goto err_free;
minor->index = r;
minor->kdev = drm_sysfs_minor_alloc(minor);
if (IS_ERR(minor->kdev)) {
r = PTR_ERR(minor->kdev);
goto err_index;
}
*drm_minor_get_slot(dev, type) = minor;
return 0;
err_index:
spin_lock_irqsave(&drm_minor_lock, flags);
idr_remove(&drm_minors_idr, minor->index);
spin_unlock_irqrestore(&drm_minor_lock, flags);
err_free:
kfree(minor);
return r;
}
static void drm_minor_free(struct drm_device *dev, unsigned int type)
{
struct drm_minor **slot;
struct drm_minor **slot, *minor;
unsigned long flags;
slot = drm_minor_get_slot(dev, type);
if (*slot) {
drm_mode_group_destroy(&(*slot)->mode_group);
kfree(*slot);
*slot = NULL;
}
minor = *slot;
if (!minor)
return;
drm_mode_group_destroy(&minor->mode_group);
put_device(minor->kdev);
spin_lock_irqsave(&drm_minor_lock, flags);
idr_remove(&drm_minors_idr, minor->index);
spin_unlock_irqrestore(&drm_minor_lock, flags);
kfree(minor);
*slot = NULL;
}
static int drm_minor_register(struct drm_device *dev, unsigned int type)
{
struct drm_minor *new_minor;
struct drm_minor *minor;
unsigned long flags;
int ret;
int minor_id;
DRM_DEBUG("\n");
new_minor = *drm_minor_get_slot(dev, type);
if (!new_minor)
minor = *drm_minor_get_slot(dev, type);
if (!minor)
return 0;
idr_preload(GFP_KERNEL);
spin_lock_irqsave(&drm_minor_lock, flags);
minor_id = idr_alloc(&drm_minors_idr,
NULL,
64 * type,
64 * (type + 1),
GFP_NOWAIT);
spin_unlock_irqrestore(&drm_minor_lock, flags);
idr_preload_end();
if (minor_id < 0)
return minor_id;
new_minor->index = minor_id;
ret = drm_debugfs_init(new_minor, minor_id, drm_debugfs_root);
ret = drm_debugfs_init(minor, minor->index, drm_debugfs_root);
if (ret) {
DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n");
goto err_id;
return ret;
}
ret = drm_sysfs_device_add(new_minor);
if (ret) {
DRM_ERROR("DRM: Error sysfs_device_add.\n");
ret = device_add(minor->kdev);
if (ret)
goto err_debugfs;
}
/* replace NULL with @minor so lookups will succeed from now on */
spin_lock_irqsave(&drm_minor_lock, flags);
idr_replace(&drm_minors_idr, new_minor, new_minor->index);
idr_replace(&drm_minors_idr, minor, minor->index);
spin_unlock_irqrestore(&drm_minor_lock, flags);
DRM_DEBUG("new minor assigned %d\n", minor_id);
DRM_DEBUG("new minor registered %d\n", minor->index);
return 0;
err_debugfs:
drm_debugfs_cleanup(new_minor);
err_id:
spin_lock_irqsave(&drm_minor_lock, flags);
idr_remove(&drm_minors_idr, minor_id);
spin_unlock_irqrestore(&drm_minor_lock, flags);
new_minor->index = 0;
drm_debugfs_cleanup(minor);
return ret;
}
@ -347,16 +362,17 @@ static void drm_minor_unregister(struct drm_device *dev, unsigned int type)
unsigned long flags;
minor = *drm_minor_get_slot(dev, type);
if (!minor || !minor->kdev)
if (!minor || !device_is_registered(minor->kdev))
return;
/* replace @minor with NULL so lookups will fail from now on */
spin_lock_irqsave(&drm_minor_lock, flags);
idr_remove(&drm_minors_idr, minor->index);
idr_replace(&drm_minors_idr, NULL, minor->index);
spin_unlock_irqrestore(&drm_minor_lock, flags);
minor->index = 0;
device_del(minor->kdev);
dev_set_drvdata(minor->kdev, NULL); /* safety belt */
drm_debugfs_cleanup(minor);
drm_sysfs_device_remove(minor);
}
/**
@ -589,7 +605,7 @@ struct drm_device *drm_dev_alloc(struct drm_driver *driver,
if (drm_ht_create(&dev->map_hash, 12))
goto err_minors;
ret = drm_ctxbitmap_init(dev);
ret = drm_legacy_ctxbitmap_init(dev);
if (ret) {
DRM_ERROR("Cannot allocate memory for context bitmap.\n");
goto err_ht;
@ -606,7 +622,7 @@ struct drm_device *drm_dev_alloc(struct drm_driver *driver,
return dev;
err_ctxbitmap:
drm_ctxbitmap_cleanup(dev);
drm_legacy_ctxbitmap_cleanup(dev);
err_ht:
drm_ht_remove(&dev->map_hash);
err_minors:
@ -628,7 +644,7 @@ static void drm_dev_release(struct kref *ref)
if (dev->driver->driver_features & DRIVER_GEM)
drm_gem_destroy(dev);
drm_ctxbitmap_cleanup(dev);
drm_legacy_ctxbitmap_cleanup(dev);
drm_ht_remove(&dev->map_hash);
drm_fs_inode_free(dev->anon_inode);
@ -791,3 +807,115 @@ int drm_dev_set_unique(struct drm_device *dev, const char *fmt, ...)
return dev->unique ? 0 : -ENOMEM;
}
EXPORT_SYMBOL(drm_dev_set_unique);
/*
* DRM Core
* The DRM core module initializes all global DRM objects and makes them
* available to drivers. Once setup, drivers can probe their respective
* devices.
* Currently, core management includes:
* - The "DRM-Global" key/value database
* - Global ID management for connectors
* - DRM major number allocation
* - DRM minor management
* - DRM sysfs class
* - DRM debugfs root
*
* Furthermore, the DRM core provides dynamic char-dev lookups. For each
* interface registered on a DRM device, you can request minor numbers from DRM
* core. DRM core takes care of major-number management and char-dev
* registration. A stub ->open() callback forwards any open() requests to the
* registered minor.
*/
static int drm_stub_open(struct inode *inode, struct file *filp)
{
const struct file_operations *new_fops;
struct drm_minor *minor;
int err;
DRM_DEBUG("\n");
mutex_lock(&drm_global_mutex);
minor = drm_minor_acquire(iminor(inode));
if (IS_ERR(minor)) {
err = PTR_ERR(minor);
goto out_unlock;
}
new_fops = fops_get(minor->dev->driver->fops);
if (!new_fops) {
err = -ENODEV;
goto out_release;
}
replace_fops(filp, new_fops);
if (filp->f_op->open)
err = filp->f_op->open(inode, filp);
else
err = 0;
out_release:
drm_minor_release(minor);
out_unlock:
mutex_unlock(&drm_global_mutex);
return err;
}
static const struct file_operations drm_stub_fops = {
.owner = THIS_MODULE,
.open = drm_stub_open,
.llseek = noop_llseek,
};
static int __init drm_core_init(void)
{
int ret = -ENOMEM;
drm_global_init();
drm_connector_ida_init();
idr_init(&drm_minors_idr);
if (register_chrdev(DRM_MAJOR, "drm", &drm_stub_fops))
goto err_p1;
drm_class = drm_sysfs_create(THIS_MODULE, "drm");
if (IS_ERR(drm_class)) {
printk(KERN_ERR "DRM: Error creating drm class.\n");
ret = PTR_ERR(drm_class);
goto err_p2;
}
drm_debugfs_root = debugfs_create_dir("dri", NULL);
if (!drm_debugfs_root) {
DRM_ERROR("Cannot create /sys/kernel/debug/dri\n");
ret = -1;
goto err_p3;
}
DRM_INFO("Initialized %s %d.%d.%d %s\n",
CORE_NAME, CORE_MAJOR, CORE_MINOR, CORE_PATCHLEVEL, CORE_DATE);
return 0;
err_p3:
drm_sysfs_destroy();
err_p2:
unregister_chrdev(DRM_MAJOR, "drm");
idr_destroy(&drm_minors_idr);
err_p1:
return ret;
}
static void __exit drm_core_exit(void)
{
debugfs_remove(drm_debugfs_root);
drm_sysfs_destroy();
unregister_chrdev(DRM_MAJOR, "drm");
drm_connector_ida_destroy();
idr_destroy(&drm_minors_idr);
}
module_init(drm_core_init);
module_exit(drm_core_exit);

84
drivers/gpu/drm/drm_sysfs.c
View File

@ -493,71 +493,55 @@ static void drm_sysfs_release(struct device *dev)
}
/**
* drm_sysfs_device_add - adds a class device to sysfs for a character driver
* @dev: DRM device to be added
* @head: DRM head in question
* drm_sysfs_minor_alloc() - Allocate sysfs device for given minor
* @minor: minor to allocate sysfs device for
*
* Add a DRM device to the DRM's device model class. We use @dev's PCI device
* as the parent for the Linux device, and make sure it has a file containing
* the driver we're using (for userspace compatibility).
* This allocates a new sysfs device for @minor and returns it. The device is
* not registered nor linked. The caller has to use device_add() and
* device_del() to register and unregister it.
*
* Note that dev_get_drvdata() on the new device will return the minor.
* However, the device does not hold a ref-count to the minor nor to the
* underlying drm_device. This is unproblematic as long as you access the
* private data only in sysfs callbacks. device_del() disables those
* synchronously, so they cannot be called after you cleanup a minor.
*/
int drm_sysfs_device_add(struct drm_minor *minor)
struct device *drm_sysfs_minor_alloc(struct drm_minor *minor)
{
char *minor_str;
const char *minor_str;
struct device *kdev;
int r;
if (minor->type == DRM_MINOR_CONTROL)
minor_str = "controlD%d";
else if (minor->type == DRM_MINOR_RENDER)
minor_str = "renderD%d";
else
minor_str = "card%d";
else if (minor->type == DRM_MINOR_RENDER)
minor_str = "renderD%d";
else
minor_str = "card%d";
minor->kdev = kzalloc(sizeof(*minor->kdev), GFP_KERNEL);
if (!minor->kdev) {
r = -ENOMEM;
goto error;
}
kdev = kzalloc(sizeof(*kdev), GFP_KERNEL);
if (!kdev)
return ERR_PTR(-ENOMEM);
device_initialize(minor->kdev);
minor->kdev->devt = MKDEV(DRM_MAJOR, minor->index);
minor->kdev->class = drm_class;
minor->kdev->type = &drm_sysfs_device_minor;
minor->kdev->parent = minor->dev->dev;
minor->kdev->release = drm_sysfs_release;
dev_set_drvdata(minor->kdev, minor);
device_initialize(kdev);
kdev->devt = MKDEV(DRM_MAJOR, minor->index);
kdev->class = drm_class;
kdev->type = &drm_sysfs_device_minor;
kdev->parent = minor->dev->dev;
kdev->release = drm_sysfs_release;
dev_set_drvdata(kdev, minor);
r = dev_set_name(minor->kdev, minor_str, minor->index);
r = dev_set_name(kdev, minor_str, minor->index);
if (r < 0)
goto error;
goto err_free;
r = device_add(minor->kdev);
if (r < 0)
goto error;
return kdev;
return 0;
error:
DRM_ERROR("device create failed %d\n", r);
put_device(minor->kdev);
return r;
err_free:
put_device(kdev);
return ERR_PTR(r);
}
/**
* drm_sysfs_device_remove - remove DRM device
* @dev: DRM device to remove
*
* This call unregisters and cleans up a class device that was created with a
* call to drm_sysfs_device_add()
*/
void drm_sysfs_device_remove(struct drm_minor *minor)
{
if (minor->kdev)
device_unregister(minor->kdev);
minor->kdev = NULL;
}
/**
* drm_class_device_register - Register a struct device in the drm class.
*

4
drivers/gpu/drm/i915/i915_gem_execbuffer.c
View File

@ -1260,7 +1260,7 @@ i915_gem_do_execbuffer(struct drm_device *dev, void *data,
flags = 0;
if (args->flags & I915_EXEC_SECURE) {
if (!file->is_master || !capable(CAP_SYS_ADMIN))
if (!drm_is_master(file) || !capable(CAP_SYS_ADMIN))
return -EPERM;
flags |= I915_DISPATCH_SECURE;
@ -1369,7 +1369,7 @@ i915_gem_do_execbuffer(struct drm_device *dev, void *data,
ret = i915_parse_cmds(ring,
batch_obj,
args->batch_start_offset,
file->is_master);
drm_is_master(file));
if (ret)
goto err;

2
drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
View File

@ -990,7 +990,7 @@ static struct vmw_master *vmw_master_check(struct drm_device *dev,
if (unlikely(ret != 0))
return ERR_PTR(-ERESTARTSYS);
if (file_priv->is_master) {
if (drm_is_master(file_priv)) {
mutex_unlock(&dev->master_mutex);
return NULL;
}

2
drivers/staging/imx-drm/imx-drm-core.c
View File

@ -182,7 +182,7 @@ static void imx_drm_driver_preclose(struct drm_device *drm,
{
int i;
if (!file->is_master)
if (!drm_is_master(file))
return;
for (i = 0; i < MAX_CRTC; i++)

61
include/drm/drmP.h
View File

@ -151,8 +151,6 @@ int drm_err(const char *func, const char *format, ...);
also include looping detection. */
#define DRM_MAGIC_HASH_ORDER 4 /**< Size of key hash table. Must be power of 2. */
#define DRM_KERNEL_CONTEXT 0 /**< Change drm_resctx if changed */
#define DRM_RESERVED_CONTEXTS 1 /**< Change drm_resctx if changed */
#define DRM_MAP_HASH_OFFSET 0x10000000
@ -385,10 +383,7 @@ struct drm_prime_file_private {
/** File private data */
struct drm_file {
unsigned always_authenticated :1;
unsigned authenticated :1;
/* Whether we're master for a minor. Protected by master_mutex */
unsigned is_master :1;
/* true when the client has asked us to expose stereo 3D mode flags */
unsigned stereo_allowed :1;
/*
@ -538,15 +533,6 @@ struct drm_map_list {
struct drm_master *master;
};
/**
* Context handle list
*/
struct drm_ctx_list {
struct list_head head; /**< list head */
drm_context_t handle; /**< context handle */
struct drm_file *tag; /**< associated fd private data */
};
/* location of GART table */
#define DRM_ATI_GART_MAIN 1
#define DRM_ATI_GART_FB 2
@ -1034,7 +1020,7 @@ struct drm_device {
/** \name Locks */
/*@{ */
struct mutex struct_mutex; /**< For others */
struct mutex master_mutex; /**< For drm_minor::master and drm_file::is_master */
struct mutex master_mutex; /**< For drm_minor::master */
/*@} */
/** \name Usage Counters */
@ -1172,6 +1158,21 @@ static inline bool drm_is_primary_client(const struct drm_file *file_priv)
return file_priv->minor->type == DRM_MINOR_LEGACY;
}
/**
* drm_is_master() - Check whether a DRM open-file is DRM-Master
* @file: DRM open-file context
*
* This checks whether a DRM open-file context is owner of the master context
* attached to it. If a file owns a master context, it's called DRM-Master.
* Per DRM device, only one such file can be DRM-Master at a time.
*
* Returns: True if the file is DRM-Master, otherwise false.
*/
static inline bool drm_is_master(const struct drm_file *file)
{
return file->master && file->master == file->minor->master;
}
/******************************************************************/
/** \name Internal function definitions */
/*@{*/
@ -1187,7 +1188,6 @@ extern bool drm_ioctl_flags(unsigned int nr, unsigned int *flags);
/* Device support (drm_fops.h) */
extern struct mutex drm_global_mutex;
extern int drm_open(struct inode *inode, struct file *filp);
extern int drm_stub_open(struct inode *inode, struct file *filp);
extern ssize_t drm_read(struct file *filp, char __user *buffer,
size_t count, loff_t *offset);
extern int drm_release(struct inode *inode, struct file *filp);
@ -1225,29 +1225,6 @@ extern int drm_setversion(struct drm_device *dev, void *data,
extern int drm_noop(struct drm_device *dev, void *data,
struct drm_file *file_priv);
/* Context IOCTL support (drm_context.h) */
extern int drm_resctx(struct drm_device *dev, void *data,
struct drm_file *file_priv);
extern int drm_addctx(struct drm_device *dev, void *data,
struct drm_file *file_priv);
extern int drm_getctx(struct drm_device *dev, void *data,
struct drm_file *file_priv);
extern int drm_switchctx(struct drm_device *dev, void *data,
struct drm_file *file_priv);
extern int drm_newctx(struct drm_device *dev, void *data,
struct drm_file *file_priv);
extern int drm_rmctx(struct drm_device *dev, void *data,
struct drm_file *file_priv);
extern int drm_ctxbitmap_init(struct drm_device *dev);
extern void drm_ctxbitmap_cleanup(struct drm_device *dev);
extern void drm_ctxbitmap_free(struct drm_device *dev, int ctx_handle);
extern int drm_setsareactx(struct drm_device *dev, void *data,
struct drm_file *file_priv);
extern int drm_getsareactx(struct drm_device *dev, void *data,
struct drm_file *file_priv);
/* Authentication IOCTL support (drm_auth.h) */
extern int drm_getmagic(struct drm_device *dev, void *data,
struct drm_file *file_priv);
@ -1373,9 +1350,6 @@ extern unsigned int drm_timestamp_precision;
extern unsigned int drm_timestamp_monotonic;
extern struct class *drm_class;
extern struct dentry *drm_debugfs_root;
extern struct idr drm_minors_idr;
extern struct drm_local_map *drm_getsarea(struct drm_device *dev);
@ -1493,9 +1467,8 @@ extern int drm_pci_set_unique(struct drm_device *dev,
struct drm_sysfs_class;
extern struct class *drm_sysfs_create(struct module *owner, char *name);
extern void drm_sysfs_destroy(void);
extern int drm_sysfs_device_add(struct drm_minor *minor);
extern struct device *drm_sysfs_minor_alloc(struct drm_minor *minor);
extern void drm_sysfs_hotplug_event(struct drm_device *dev);
extern void drm_sysfs_device_remove(struct drm_minor *minor);
extern int drm_sysfs_connector_add(struct drm_connector *connector);
extern void drm_sysfs_connector_remove(struct drm_connector *connector);