535 lines
15 KiB
C
535 lines
15 KiB
C
/**
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* \file drm_drv.h
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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, 0 },
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[DRM_IOCTL_NR(DRM_IOCTL_GET_UNIQUE)] = { drm_getunique, 0, 0 },
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[DRM_IOCTL_NR(DRM_IOCTL_GET_MAGIC)] = { drm_getmagic, 0, 0 },
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[DRM_IOCTL_NR(DRM_IOCTL_IRQ_BUSID)] = { drm_irq_by_busid, 0, 1 },
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[DRM_IOCTL_NR(DRM_IOCTL_GET_MAP)] = { drm_getmap, 0, 0 },
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[DRM_IOCTL_NR(DRM_IOCTL_GET_CLIENT)] = { drm_getclient, 0, 0 },
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[DRM_IOCTL_NR(DRM_IOCTL_GET_STATS)] = { drm_getstats, 0, 0 },
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[DRM_IOCTL_NR(DRM_IOCTL_SET_VERSION)] = { drm_setversion, 0, 1 },
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[DRM_IOCTL_NR(DRM_IOCTL_SET_UNIQUE)] = { drm_setunique, 1, 1 },
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[DRM_IOCTL_NR(DRM_IOCTL_BLOCK)] = { drm_noop, 1, 1 },
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[DRM_IOCTL_NR(DRM_IOCTL_UNBLOCK)] = { drm_noop, 1, 1 },
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[DRM_IOCTL_NR(DRM_IOCTL_AUTH_MAGIC)] = { drm_authmagic, 1, 1 },
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[DRM_IOCTL_NR(DRM_IOCTL_ADD_MAP)] = { drm_addmap, 1, 1 },
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[DRM_IOCTL_NR(DRM_IOCTL_RM_MAP)] = { drm_rmmap, 1, 0 },
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[DRM_IOCTL_NR(DRM_IOCTL_SET_SAREA_CTX)] = { drm_setsareactx, 1, 1 },
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[DRM_IOCTL_NR(DRM_IOCTL_GET_SAREA_CTX)] = { drm_getsareactx, 1, 0 },
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[DRM_IOCTL_NR(DRM_IOCTL_ADD_CTX)] = { drm_addctx, 1, 1 },
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[DRM_IOCTL_NR(DRM_IOCTL_RM_CTX)] = { drm_rmctx, 1, 1 },
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[DRM_IOCTL_NR(DRM_IOCTL_MOD_CTX)] = { drm_modctx, 1, 1 },
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[DRM_IOCTL_NR(DRM_IOCTL_GET_CTX)] = { drm_getctx, 1, 0 },
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[DRM_IOCTL_NR(DRM_IOCTL_SWITCH_CTX)] = { drm_switchctx, 1, 1 },
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[DRM_IOCTL_NR(DRM_IOCTL_NEW_CTX)] = { drm_newctx, 1, 1 },
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[DRM_IOCTL_NR(DRM_IOCTL_RES_CTX)] = { drm_resctx, 1, 0 },
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[DRM_IOCTL_NR(DRM_IOCTL_ADD_DRAW)] = { drm_adddraw, 1, 1 },
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[DRM_IOCTL_NR(DRM_IOCTL_RM_DRAW)] = { drm_rmdraw, 1, 1 },
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[DRM_IOCTL_NR(DRM_IOCTL_LOCK)] = { drm_lock, 1, 0 },
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[DRM_IOCTL_NR(DRM_IOCTL_UNLOCK)] = { drm_unlock, 1, 0 },
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[DRM_IOCTL_NR(DRM_IOCTL_FINISH)] = { drm_noop, 1, 0 },
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[DRM_IOCTL_NR(DRM_IOCTL_ADD_BUFS)] = { drm_addbufs, 1, 1 },
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[DRM_IOCTL_NR(DRM_IOCTL_MARK_BUFS)] = { drm_markbufs, 1, 1 },
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[DRM_IOCTL_NR(DRM_IOCTL_INFO_BUFS)] = { drm_infobufs, 1, 0 },
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[DRM_IOCTL_NR(DRM_IOCTL_MAP_BUFS)] = { drm_mapbufs, 1, 0 },
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[DRM_IOCTL_NR(DRM_IOCTL_FREE_BUFS)] = { drm_freebufs, 1, 0 },
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/* The DRM_IOCTL_DMA ioctl should be defined by the driver. */
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[DRM_IOCTL_NR(DRM_IOCTL_CONTROL)] = { drm_control, 1, 1 },
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#if __OS_HAS_AGP
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[DRM_IOCTL_NR(DRM_IOCTL_AGP_ACQUIRE)] = { drm_agp_acquire, 1, 1 },
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[DRM_IOCTL_NR(DRM_IOCTL_AGP_RELEASE)] = { drm_agp_release, 1, 1 },
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[DRM_IOCTL_NR(DRM_IOCTL_AGP_ENABLE)] = { drm_agp_enable, 1, 1 },
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[DRM_IOCTL_NR(DRM_IOCTL_AGP_INFO)] = { drm_agp_info, 1, 0 },
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[DRM_IOCTL_NR(DRM_IOCTL_AGP_ALLOC)] = { drm_agp_alloc, 1, 1 },
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[DRM_IOCTL_NR(DRM_IOCTL_AGP_FREE)] = { drm_agp_free, 1, 1 },
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[DRM_IOCTL_NR(DRM_IOCTL_AGP_BIND)] = { drm_agp_bind, 1, 1 },
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[DRM_IOCTL_NR(DRM_IOCTL_AGP_UNBIND)] = { drm_agp_unbind, 1, 1 },
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#endif
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[DRM_IOCTL_NR(DRM_IOCTL_SG_ALLOC)] = { drm_sg_alloc, 1, 1 },
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[DRM_IOCTL_NR(DRM_IOCTL_SG_FREE)] = { drm_sg_free, 1, 1 },
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[DRM_IOCTL_NR(DRM_IOCTL_WAIT_VBLANK)] = { drm_wait_vblank, 0, 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 and setup().
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*/
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int drm_takedown( drm_device_t *dev )
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{
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drm_magic_entry_t *pt, *next;
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drm_map_t *map;
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drm_map_list_t *r_list;
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struct list_head *list, *list_next;
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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->pretakedown)
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dev->driver->pretakedown(dev);
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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 ) 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 ) 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 ) drm_agp_do_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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/* 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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list_for_each_safe( list, list_next, &dev->maplist->head ) {
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r_list = (drm_map_list_t *)list;
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if ( ( map = r_list->map ) ) {
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switch ( map->type ) {
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case _DRM_REGISTERS:
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case _DRM_FRAME_BUFFER:
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if (drm_core_has_MTRR(dev)) {
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if ( map->mtrr >= 0 ) {
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int retcode;
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retcode = mtrr_del( map->mtrr,
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map->offset,
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map->size );
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DRM_DEBUG( "mtrr_del=%d\n", retcode );
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}
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}
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drm_ioremapfree( map->handle, map->size, dev );
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break;
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case _DRM_SHM:
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vfree(map->handle);
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break;
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case _DRM_AGP:
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/* Do nothing here, because this is all
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* handled in the AGP/GART driver.
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*/
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break;
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case _DRM_SCATTER_GATHER:
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/* Handle it */
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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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break;
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}
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drm_free(map, sizeof(*map), DRM_MEM_MAPS);
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}
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list_del( list );
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drm_free(r_list, sizeof(*r_list), DRM_MEM_MAPS);
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}
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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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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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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 = pci_get_subsys(pid->vendor, pid->device, pid->subvendor, 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 takedown().
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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_takedown( dev );
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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->postcleanup)
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dev->driver->postcleanup(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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}
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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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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 = (drm_cards_limit < DRM_MAX_MINOR + 1 ? drm_cards_limit : DRM_MAX_MINOR + 1);
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drm_heads = drm_calloc(drm_cards_limit,
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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 = create_proc_entry("dri", S_IFDIR, 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,
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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) *
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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;
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|
drm_version_t __user *argp = (void __user *)arg;
|
|
drm_version_t version;
|
|
int ret;
|
|
|
|
if ( copy_from_user( &version, argp, sizeof(version) ) )
|
|
return -EFAULT;
|
|
|
|
/* version is a required function to return the personality module version */
|
|
if ((ret = dev->driver->version(&version)))
|
|
return ret;
|
|
|
|
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->root_only && !capable( CAP_SYS_ADMIN ) )||
|
|
( ioctl->auth_needed && !priv->authenticated ) ) {
|
|
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);
|
|
|