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514 lines
15 KiB
C
514 lines
15 KiB
C
/**
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* \file drm_drv.c
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* Generic driver template
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*
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* \author Rickard E. (Rik) Faith <faith@valinux.com>
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* \author Gareth Hughes <gareth@valinux.com>
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*
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* To use this template, you must at least define the following (samples
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* given for the MGA driver):
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*
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* \code
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* #define DRIVER_AUTHOR "VA Linux Systems, Inc."
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*
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* #define DRIVER_NAME "mga"
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* #define DRIVER_DESC "Matrox G200/G400"
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* #define DRIVER_DATE "20001127"
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*
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* #define DRIVER_IOCTL_COUNT DRM_ARRAY_SIZE( mga_ioctls )
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*
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* #define drm_x mga_##x
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* \endcode
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*/
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/*
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* Created: Thu Nov 23 03:10:50 2000 by gareth@valinux.com
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*
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* Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas.
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* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "drmP.h"
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#include "drm_core.h"
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static int drm_version(struct inode *inode, struct file *filp,
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unsigned int cmd, unsigned long arg);
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/** Ioctl table */
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static drm_ioctl_desc_t drm_ioctls[] = {
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[DRM_IOCTL_NR(DRM_IOCTL_VERSION)] = {drm_version, 0},
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[DRM_IOCTL_NR(DRM_IOCTL_GET_UNIQUE)] = {drm_getunique, 0},
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[DRM_IOCTL_NR(DRM_IOCTL_GET_MAGIC)] = {drm_getmagic, 0},
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[DRM_IOCTL_NR(DRM_IOCTL_IRQ_BUSID)] = {drm_irq_by_busid, DRM_MASTER|DRM_ROOT_ONLY},
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[DRM_IOCTL_NR(DRM_IOCTL_GET_MAP)] = {drm_getmap, 0},
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[DRM_IOCTL_NR(DRM_IOCTL_GET_CLIENT)] = {drm_getclient, 0},
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[DRM_IOCTL_NR(DRM_IOCTL_GET_STATS)] = {drm_getstats, 0},
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[DRM_IOCTL_NR(DRM_IOCTL_SET_VERSION)] = {drm_setversion, DRM_MASTER|DRM_ROOT_ONLY},
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[DRM_IOCTL_NR(DRM_IOCTL_SET_UNIQUE)] = {drm_setunique, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
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[DRM_IOCTL_NR(DRM_IOCTL_BLOCK)] = {drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
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[DRM_IOCTL_NR(DRM_IOCTL_UNBLOCK)] = {drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
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[DRM_IOCTL_NR(DRM_IOCTL_AUTH_MAGIC)] = {drm_authmagic, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
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[DRM_IOCTL_NR(DRM_IOCTL_ADD_MAP)] = {drm_addmap_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
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[DRM_IOCTL_NR(DRM_IOCTL_RM_MAP)] = {drm_rmmap_ioctl, DRM_AUTH},
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[DRM_IOCTL_NR(DRM_IOCTL_SET_SAREA_CTX)] = {drm_setsareactx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
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[DRM_IOCTL_NR(DRM_IOCTL_GET_SAREA_CTX)] = {drm_getsareactx, DRM_AUTH},
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[DRM_IOCTL_NR(DRM_IOCTL_ADD_CTX)] = {drm_addctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
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[DRM_IOCTL_NR(DRM_IOCTL_RM_CTX)] = {drm_rmctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
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[DRM_IOCTL_NR(DRM_IOCTL_MOD_CTX)] = {drm_modctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
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[DRM_IOCTL_NR(DRM_IOCTL_GET_CTX)] = {drm_getctx, DRM_AUTH},
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[DRM_IOCTL_NR(DRM_IOCTL_SWITCH_CTX)] = {drm_switchctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
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[DRM_IOCTL_NR(DRM_IOCTL_NEW_CTX)] = {drm_newctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
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[DRM_IOCTL_NR(DRM_IOCTL_RES_CTX)] = {drm_resctx, DRM_AUTH},
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[DRM_IOCTL_NR(DRM_IOCTL_ADD_DRAW)] = {drm_adddraw, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
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[DRM_IOCTL_NR(DRM_IOCTL_RM_DRAW)] = {drm_rmdraw, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
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[DRM_IOCTL_NR(DRM_IOCTL_LOCK)] = {drm_lock, DRM_AUTH},
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[DRM_IOCTL_NR(DRM_IOCTL_UNLOCK)] = {drm_unlock, DRM_AUTH},
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[DRM_IOCTL_NR(DRM_IOCTL_FINISH)] = {drm_noop, DRM_AUTH},
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[DRM_IOCTL_NR(DRM_IOCTL_ADD_BUFS)] = {drm_addbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
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[DRM_IOCTL_NR(DRM_IOCTL_MARK_BUFS)] = {drm_markbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
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[DRM_IOCTL_NR(DRM_IOCTL_INFO_BUFS)] = {drm_infobufs, DRM_AUTH},
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[DRM_IOCTL_NR(DRM_IOCTL_MAP_BUFS)] = {drm_mapbufs, DRM_AUTH},
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[DRM_IOCTL_NR(DRM_IOCTL_FREE_BUFS)] = {drm_freebufs, DRM_AUTH},
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/* The DRM_IOCTL_DMA ioctl should be defined by the driver. */
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[DRM_IOCTL_NR(DRM_IOCTL_DMA)] = {NULL, DRM_AUTH},
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[DRM_IOCTL_NR(DRM_IOCTL_CONTROL)] = {drm_control, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
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#if __OS_HAS_AGP
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[DRM_IOCTL_NR(DRM_IOCTL_AGP_ACQUIRE)] = {drm_agp_acquire_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
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[DRM_IOCTL_NR(DRM_IOCTL_AGP_RELEASE)] = {drm_agp_release_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
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[DRM_IOCTL_NR(DRM_IOCTL_AGP_ENABLE)] = {drm_agp_enable_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
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[DRM_IOCTL_NR(DRM_IOCTL_AGP_INFO)] = {drm_agp_info_ioctl, DRM_AUTH},
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[DRM_IOCTL_NR(DRM_IOCTL_AGP_ALLOC)] = {drm_agp_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
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[DRM_IOCTL_NR(DRM_IOCTL_AGP_FREE)] = {drm_agp_free_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
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[DRM_IOCTL_NR(DRM_IOCTL_AGP_BIND)] = {drm_agp_bind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
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[DRM_IOCTL_NR(DRM_IOCTL_AGP_UNBIND)] = {drm_agp_unbind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
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#endif
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[DRM_IOCTL_NR(DRM_IOCTL_SG_ALLOC)] = {drm_sg_alloc, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
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[DRM_IOCTL_NR(DRM_IOCTL_SG_FREE)] = {drm_sg_free, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
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[DRM_IOCTL_NR(DRM_IOCTL_WAIT_VBLANK)] = {drm_wait_vblank, 0},
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};
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#define DRIVER_IOCTL_COUNT DRM_ARRAY_SIZE( drm_ioctls )
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/**
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* Take down the DRM device.
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*
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* \param dev DRM device structure.
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*
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* Frees every resource in \p dev.
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*
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* \sa drm_device
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*/
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int drm_lastclose(drm_device_t * dev)
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{
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drm_magic_entry_t *pt, *next;
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drm_map_list_t *r_list;
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drm_vma_entry_t *vma, *vma_next;
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int i;
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DRM_DEBUG("\n");
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if (dev->driver->lastclose)
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dev->driver->lastclose(dev);
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DRM_DEBUG("driver lastclose completed\n");
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if (dev->unique) {
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drm_free(dev->unique, strlen(dev->unique) + 1, DRM_MEM_DRIVER);
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dev->unique = NULL;
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dev->unique_len = 0;
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}
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if (dev->irq_enabled)
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drm_irq_uninstall(dev);
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down(&dev->struct_sem);
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del_timer(&dev->timer);
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/* Clear pid list */
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for (i = 0; i < DRM_HASH_SIZE; i++) {
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for (pt = dev->magiclist[i].head; pt; pt = next) {
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next = pt->next;
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drm_free(pt, sizeof(*pt), DRM_MEM_MAGIC);
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}
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dev->magiclist[i].head = dev->magiclist[i].tail = NULL;
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}
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/* Clear AGP information */
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if (drm_core_has_AGP(dev) && dev->agp) {
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drm_agp_mem_t *entry;
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drm_agp_mem_t *nexte;
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/* Remove AGP resources, but leave dev->agp
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intact until drv_cleanup is called. */
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for (entry = dev->agp->memory; entry; entry = nexte) {
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nexte = entry->next;
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if (entry->bound)
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drm_unbind_agp(entry->memory);
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drm_free_agp(entry->memory, entry->pages);
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drm_free(entry, sizeof(*entry), DRM_MEM_AGPLISTS);
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}
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dev->agp->memory = NULL;
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if (dev->agp->acquired)
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drm_agp_release(dev);
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dev->agp->acquired = 0;
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dev->agp->enabled = 0;
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}
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if (drm_core_check_feature(dev, DRIVER_SG) && dev->sg) {
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drm_sg_cleanup(dev->sg);
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dev->sg = NULL;
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}
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/* Clear vma list (only built for debugging) */
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if (dev->vmalist) {
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for (vma = dev->vmalist; vma; vma = vma_next) {
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vma_next = vma->next;
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drm_free(vma, sizeof(*vma), DRM_MEM_VMAS);
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}
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dev->vmalist = NULL;
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}
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if (dev->maplist) {
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while (!list_empty(&dev->maplist->head)) {
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struct list_head *list = dev->maplist->head.next;
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r_list = list_entry(list, drm_map_list_t, head);
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drm_rmmap_locked(dev, r_list->map);
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}
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}
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if (drm_core_check_feature(dev, DRIVER_DMA_QUEUE) && dev->queuelist) {
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for (i = 0; i < dev->queue_count; i++) {
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if (dev->queuelist[i]) {
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drm_free(dev->queuelist[i],
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sizeof(*dev->queuelist[0]),
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DRM_MEM_QUEUES);
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dev->queuelist[i] = NULL;
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}
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}
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drm_free(dev->queuelist,
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dev->queue_slots * sizeof(*dev->queuelist),
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DRM_MEM_QUEUES);
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dev->queuelist = NULL;
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}
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dev->queue_count = 0;
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if (drm_core_check_feature(dev, DRIVER_HAVE_DMA))
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drm_dma_takedown(dev);
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if (dev->lock.hw_lock) {
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dev->sigdata.lock = dev->lock.hw_lock = NULL; /* SHM removed */
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dev->lock.filp = NULL;
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wake_up_interruptible(&dev->lock.lock_queue);
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}
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up(&dev->struct_sem);
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DRM_DEBUG("lastclose completed\n");
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return 0;
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}
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/**
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* Module initialization. Called via init_module at module load time, or via
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* linux/init/main.c (this is not currently supported).
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*
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* \return zero on success or a negative number on failure.
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*
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* Initializes an array of drm_device structures, and attempts to
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* initialize all available devices, using consecutive minors, registering the
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* stubs and initializing the AGP device.
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*
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* Expands the \c DRIVER_PREINIT and \c DRIVER_POST_INIT macros before and
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* after the initialization for driver customization.
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*/
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int drm_init(struct drm_driver *driver)
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{
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struct pci_dev *pdev = NULL;
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struct pci_device_id *pid;
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int i;
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DRM_DEBUG("\n");
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drm_mem_init();
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for (i = 0; driver->pci_driver.id_table[i].vendor != 0; i++) {
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pid = (struct pci_device_id *)&driver->pci_driver.id_table[i];
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pdev = NULL;
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/* pass back in pdev to account for multiple identical cards */
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while ((pdev =
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pci_get_subsys(pid->vendor, pid->device, pid->subvendor,
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pid->subdevice, pdev)) != NULL) {
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/* stealth mode requires a manual probe */
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pci_dev_get(pdev);
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drm_get_dev(pdev, pid, driver);
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}
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}
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return 0;
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}
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EXPORT_SYMBOL(drm_init);
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/**
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* Called via cleanup_module() at module unload time.
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*
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* Cleans up all DRM device, calling drm_lastclose().
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*
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* \sa drm_init
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*/
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static void drm_cleanup(drm_device_t * dev)
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{
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DRM_DEBUG("\n");
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if (!dev) {
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DRM_ERROR("cleanup called no dev\n");
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return;
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}
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drm_lastclose(dev);
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if (dev->maplist) {
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drm_free(dev->maplist, sizeof(*dev->maplist), DRM_MEM_MAPS);
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dev->maplist = NULL;
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}
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drm_ctxbitmap_cleanup(dev);
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if (drm_core_has_MTRR(dev) && drm_core_has_AGP(dev) &&
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dev->agp && dev->agp->agp_mtrr >= 0) {
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int retval;
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retval = mtrr_del(dev->agp->agp_mtrr,
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dev->agp->agp_info.aper_base,
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dev->agp->agp_info.aper_size * 1024 * 1024);
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DRM_DEBUG("mtrr_del=%d\n", retval);
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}
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if (drm_core_has_AGP(dev) && dev->agp) {
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drm_free(dev->agp, sizeof(*dev->agp), DRM_MEM_AGPLISTS);
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dev->agp = NULL;
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}
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if (dev->driver->unload)
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dev->driver->unload(dev);
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drm_put_head(&dev->primary);
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if (drm_put_dev(dev))
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DRM_ERROR("Cannot unload module\n");
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}
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void drm_exit(struct drm_driver *driver)
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{
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int i;
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drm_device_t *dev = NULL;
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drm_head_t *head;
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DRM_DEBUG("\n");
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for (i = 0; i < drm_cards_limit; i++) {
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head = drm_heads[i];
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if (!head)
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continue;
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if (!head->dev)
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continue;
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if (head->dev->driver != driver)
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continue;
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dev = head->dev;
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if (dev) {
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/* release the pci driver */
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if (dev->pdev)
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pci_dev_put(dev->pdev);
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drm_cleanup(dev);
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}
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}
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DRM_INFO("Module unloaded\n");
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}
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EXPORT_SYMBOL(drm_exit);
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/** File operations structure */
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static struct file_operations drm_stub_fops = {
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.owner = THIS_MODULE,
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.open = drm_stub_open
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};
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static int __init drm_core_init(void)
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{
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int ret = -ENOMEM;
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drm_cards_limit =
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(drm_cards_limit <
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DRM_MAX_MINOR + 1 ? drm_cards_limit : DRM_MAX_MINOR + 1);
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drm_heads =
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drm_calloc(drm_cards_limit, sizeof(*drm_heads), DRM_MEM_STUB);
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if (!drm_heads)
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goto err_p1;
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if (register_chrdev(DRM_MAJOR, "drm", &drm_stub_fops))
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goto err_p1;
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drm_class = drm_sysfs_create(THIS_MODULE, "drm");
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if (IS_ERR(drm_class)) {
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printk(KERN_ERR "DRM: Error creating drm class.\n");
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ret = PTR_ERR(drm_class);
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goto err_p2;
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}
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drm_proc_root = proc_mkdir("dri", NULL);
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if (!drm_proc_root) {
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DRM_ERROR("Cannot create /proc/dri\n");
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ret = -1;
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goto err_p3;
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}
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DRM_INFO("Initialized %s %d.%d.%d %s\n",
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CORE_NAME, CORE_MAJOR, CORE_MINOR, CORE_PATCHLEVEL, CORE_DATE);
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return 0;
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err_p3:
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drm_sysfs_destroy(drm_class);
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err_p2:
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unregister_chrdev(DRM_MAJOR, "drm");
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drm_free(drm_heads, sizeof(*drm_heads) * drm_cards_limit, DRM_MEM_STUB);
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err_p1:
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return ret;
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}
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static void __exit drm_core_exit(void)
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{
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remove_proc_entry("dri", NULL);
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drm_sysfs_destroy(drm_class);
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unregister_chrdev(DRM_MAJOR, "drm");
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drm_free(drm_heads, sizeof(*drm_heads) * drm_cards_limit, DRM_MEM_STUB);
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}
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module_init(drm_core_init);
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module_exit(drm_core_exit);
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/**
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* Get version information
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*
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* \param inode device inode.
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* \param filp file pointer.
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* \param cmd command.
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* \param arg user argument, pointing to a drm_version structure.
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* \return zero on success or negative number on failure.
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*
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* Fills in the version information in \p arg.
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*/
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static int drm_version(struct inode *inode, struct file *filp,
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unsigned int cmd, unsigned long arg)
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{
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drm_file_t *priv = filp->private_data;
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drm_device_t *dev = priv->head->dev;
|
|
drm_version_t __user *argp = (void __user *)arg;
|
|
drm_version_t version;
|
|
int len;
|
|
|
|
if (copy_from_user(&version, argp, sizeof(version)))
|
|
return -EFAULT;
|
|
|
|
version.version_major = dev->driver->major;
|
|
version.version_minor = dev->driver->minor;
|
|
version.version_patchlevel = dev->driver->patchlevel;
|
|
DRM_COPY(version.name, dev->driver->name);
|
|
DRM_COPY(version.date, dev->driver->date);
|
|
DRM_COPY(version.desc, dev->driver->desc);
|
|
|
|
if (copy_to_user(argp, &version, sizeof(version)))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Called whenever a process performs an ioctl on /dev/drm.
|
|
*
|
|
* \param inode device inode.
|
|
* \param filp file pointer.
|
|
* \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.
|
|
*/
|
|
int drm_ioctl(struct inode *inode, struct file *filp,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
drm_file_t *priv = filp->private_data;
|
|
drm_device_t *dev = priv->head->dev;
|
|
drm_ioctl_desc_t *ioctl;
|
|
drm_ioctl_t *func;
|
|
unsigned int nr = DRM_IOCTL_NR(cmd);
|
|
int retcode = -EINVAL;
|
|
|
|
atomic_inc(&dev->ioctl_count);
|
|
atomic_inc(&dev->counts[_DRM_STAT_IOCTLS]);
|
|
++priv->ioctl_count;
|
|
|
|
DRM_DEBUG("pid=%d, cmd=0x%02x, nr=0x%02x, dev 0x%lx, auth=%d\n",
|
|
current->pid, cmd, nr,
|
|
(long)old_encode_dev(priv->head->device),
|
|
priv->authenticated);
|
|
|
|
if (nr < DRIVER_IOCTL_COUNT)
|
|
ioctl = &drm_ioctls[nr];
|
|
else if ((nr >= DRM_COMMAND_BASE)
|
|
&& (nr < DRM_COMMAND_BASE + dev->driver->num_ioctls))
|
|
ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE];
|
|
else
|
|
goto err_i1;
|
|
|
|
func = ioctl->func;
|
|
/* is there a local override? */
|
|
if ((nr == DRM_IOCTL_NR(DRM_IOCTL_DMA)) && dev->driver->dma_ioctl)
|
|
func = dev->driver->dma_ioctl;
|
|
|
|
if (!func) {
|
|
DRM_DEBUG("no function\n");
|
|
retcode = -EINVAL;
|
|
} else if (((ioctl->flags & DRM_ROOT_ONLY) && !capable(CAP_SYS_ADMIN)) ||
|
|
((ioctl->flags & DRM_AUTH) && !priv->authenticated) ||
|
|
((ioctl->flags & DRM_MASTER) && !priv->master)) {
|
|
retcode = -EACCES;
|
|
} else {
|
|
retcode = func(inode, filp, cmd, arg);
|
|
}
|
|
|
|
err_i1:
|
|
atomic_dec(&dev->ioctl_count);
|
|
if (retcode)
|
|
DRM_DEBUG("ret = %x\n", retcode);
|
|
return retcode;
|
|
}
|
|
|
|
EXPORT_SYMBOL(drm_ioctl);
|