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Diffstat (limited to 'src/glx/mini/xf86drm.c')
| -rw-r--r-- | src/glx/mini/xf86drm.c | 1587 |
1 files changed, 0 insertions, 1587 deletions
diff --git a/src/glx/mini/xf86drm.c b/src/glx/mini/xf86drm.c deleted file mode 100644 index bbb02e4032..0000000000 --- a/src/glx/mini/xf86drm.c +++ /dev/null @@ -1,1587 +0,0 @@ -/** - * \file xf86drm.c - * \brief User-level interface to DRM device - * - * This file is an user-friendly interface to the DRM ioctls defined in drm.h. - * - * This covers only the device-independent ioctls -- it is up to the driver to - * wrap the device-dependent ioctls. - * - * \author Rickard E. (Rik) Faith <faith@valinux.com> - * \author Kevin E. Martin <martin@valinux.com> - */ - -/* - * Copyright 1999 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 - * PRECISION INSIGHT 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 <stdio.h> -# include <stdlib.h> -# include <unistd.h> -# include <string.h> -# include <ctype.h> -# include <fcntl.h> -# include <errno.h> -# include <signal.h> -# include <sys/types.h> -# include <sys/stat.h> -# include <sys/ioctl.h> -# include <sys/mman.h> -# include <sys/time.h> -# include <stdarg.h> -# include "drm.h" - -/* Not all systems have MAP_FAILED defined */ -#ifndef MAP_FAILED -#define MAP_FAILED ((void *)-1) -#endif - -#include "xf86drm.h" - -#ifndef DRM_MAJOR -#define DRM_MAJOR 226 /* Linux */ -#endif - -#ifndef __linux__ -#undef DRM_MAJOR -#define DRM_MAJOR 145 /* Should set in drm.h for *BSD */ -#endif - -#ifndef DRM_MAX_MINOR -#define DRM_MAX_MINOR 16 -#endif - -#ifdef __linux__ -#include <sys/sysmacros.h> /* for makedev() */ -#endif - -#ifndef makedev - /* This definition needs to be changed on - some systems if dev_t is a structure. - If there is a header file we can get it - from, there would be best. */ -#define makedev(x,y) ((dev_t)(((x) << 8) | (y))) -#endif - - -/** - * \brief Output a message to stderr. - * - * \param format printf() like format string. - * - * \internal - * This function is a wrapper around vfprintf(). - */ -static void -drmMsg(const char *format, ...) -{ - va_list ap; - - const char *env; - if ((env = getenv("LIBGL_DEBUG")) && strstr(env, "verbose")) - { - va_start(ap, format); - vfprintf(stderr, format, ap); - va_end(ap); - } -} - - - -/** - * \brief Open the DRM device, creating it if necessary. - * - * \param dev major and minor numbers of the device. - * \param minor minor number of the device. - * - * \return a file descriptor on success, or a negative value on error. - * - * \internal - * Assembles the device name from \p minor and opens it, creating the device - * special file node with the major and minor numbers specified by \p dev and - * parent directory if necessary and was called by root. - */ -static int drmOpenDevice(long dev, int minor) -{ - struct stat st; - char buf[64]; - int fd; - mode_t devmode = DRM_DEV_MODE; - int isroot = !geteuid(); -#if defined(XFree86Server) - uid_t user = DRM_DEV_UID; - gid_t group = DRM_DEV_GID; -#endif - - drmMsg("drmOpenDevice: minor is %d\n", minor); - -#if defined(XFree86Server) - devmode = xf86ConfigDRI.mode ? xf86ConfigDRI.mode : DRM_DEV_MODE; - devmode &= ~(S_IXUSR|S_IXGRP|S_IXOTH); - group = (xf86ConfigDRI.group >= 0) ? xf86ConfigDRI.group : DRM_DEV_GID; -#endif - - if (stat(DRM_DIR_NAME, &st)) { - if (!isroot) return DRM_ERR_NOT_ROOT; - mkdir(DRM_DIR_NAME, DRM_DEV_DIRMODE); - chown(DRM_DIR_NAME, 0, 0); /* root:root */ - chmod(DRM_DIR_NAME, DRM_DEV_DIRMODE); - } - - sprintf(buf, DRM_DEV_NAME, DRM_DIR_NAME, minor); - drmMsg("drmOpenDevice: node name is %s\n", buf); - if (stat(buf, &st)) { - if (!isroot) return DRM_ERR_NOT_ROOT; - remove(buf); - mknod(buf, S_IFCHR | devmode, dev); - } -#if defined(XFree86Server) - chown(buf, user, group); - chmod(buf, devmode); -#endif - - fd = open(buf, O_RDWR, 0); - drmMsg("drmOpenDevice: open result is %d, (%s)\n", - fd, fd < 0 ? strerror(errno) : "OK"); - if (fd >= 0) return fd; - - if (st.st_rdev != dev) { - if (!isroot) return DRM_ERR_NOT_ROOT; - remove(buf); - mknod(buf, S_IFCHR | devmode, dev); - } - fd = open(buf, O_RDWR, 0); - drmMsg("drmOpenDevice: open result is %d, (%s)\n", - fd, fd < 0 ? strerror(errno) : "OK"); - if (fd >= 0) return fd; - - drmMsg("drmOpenDevice: Open failed\n"); - remove(buf); - return -errno; -} - - -/** - * \brief Open the DRM device - * - * \param minor device minor number. - * \param create allow to create the device if set. - * - * \return a file descriptor on success, or a negative value on error. - * - * \internal - * Calls drmOpenDevice() if \p create is set, otherwise assembles the device - * name from \p minor and opens it. - */ -static int drmOpenMinor(int minor, int create) -{ - int fd; - char buf[64]; - - if (create) return drmOpenDevice(makedev(DRM_MAJOR, minor), minor); - - sprintf(buf, DRM_DEV_NAME, DRM_DIR_NAME, minor); - if ((fd = open(buf, O_RDWR, 0)) >= 0) return fd; - drmMsg("drmOpenMinor: open result is %d, (%s)\n", - fd, fd < 0 ? strerror(errno) : "OK"); - return -errno; -} - - -/** - * \brief Determine whether the DRM kernel driver has been loaded. - * - * \return 1 if the DRM driver is loaded, 0 otherwise. - * - * \internal - * Determine the presence of the kernel driver by attempting to open the 0 - * minor and get version information. For backward compatibility with older - * Linux implementations, /proc/dri is also checked. - */ -int drmAvailable(void) -{ - drmVersionPtr version; - int retval = 0; - int fd; - - if ((fd = drmOpenMinor(0, 1)) < 0) { - /* Try proc for backward Linux compatibility */ - if (!access("/proc/dri/0", R_OK)) return 1; - return 0; - } - - if ((version = drmGetVersion(fd))) { - retval = 1; - drmFreeVersion(version); - } - close(fd); - drmMsg("close %d\n", fd); - - return retval; -} - - -/** - * \brief Open the device by bus ID. - * - * \param busid bus ID. - * - * \return a file descriptor on success, or a negative value on error. - * - * \internal - * This function attempts to open every possible minor (up to DRM_MAX_MINOR), - * comparing the device bus ID with the one supplied. - * - * \sa drmOpenMinor() and drmGetBusid(). - */ -static int drmOpenByBusid(const char *busid) -{ - int i; - int fd; - const char *buf; - - drmMsg("drmOpenByBusid: busid is %s\n", busid); - for (i = 0; i < DRM_MAX_MINOR; i++) { - fd = drmOpenMinor(i, 1); - drmMsg("drmOpenByBusid: drmOpenMinor returns %d\n", fd); - if (fd >= 0) { - buf = drmGetBusid(fd); - drmMsg("drmOpenByBusid: drmGetBusid reports %s\n", buf); - if (buf && !strcmp(buf, busid)) { - drmFreeBusid(buf); - return fd; - } - if (buf) drmFreeBusid(buf); - close(fd); - drmMsg("close %d\n", fd); - } - } - return -1; -} - - -/** - * \brief Open the device by name. - * - * \param name driver name. - * - * \return a file descriptor on success, or a negative value on error. - * - * \internal - * This function opens the first minor number that matches the driver name and - * isn't already in use. If it's in use it then it will already have a bus ID - * assigned. - * - * \sa drmOpenMinor(), drmGetVersion() and drmGetBusid(). - */ -static int drmOpenByName(const char *name) -{ - int i; - int fd; - drmVersionPtr version; - char * id; - - if (!drmAvailable()) { -#if !defined(XFree86Server) - return -1; -#else - /* try to load the kernel module now */ - if (!xf86LoadKernelModule(name)) { - ErrorF("[drm] failed to load kernel module \"%s\"\n", - name); - return -1; - } -#endif - } - - for (i = 0; i < DRM_MAX_MINOR; i++) { - if ((fd = drmOpenMinor(i, 1)) >= 0) { - if ((version = drmGetVersion(fd))) { - if (!strcmp(version->name, name)) { - drmFreeVersion(version); - -/* return fd; */ - - id = drmGetBusid(fd); - drmMsg("drmGetBusid returned '%s'\n", id ? id : "NULL"); - if (!id || !*id) { - if (id) { - drmFreeBusid(id); - } - return fd; - } else { - drmFreeBusid(id); - } - } else { - drmFreeVersion(version); - } - } - close(fd); - drmMsg("close %d\n", fd); - } - } - - return -1; -} - - -/** - * \brief Open the DRM device. - * - * Looks up the specified name and bus ID, and opens the device found. The - * entry in /dev/dri is created if necessary and if called by root. - * - * \param name driver name. Not referenced if bus ID is supplied. - * \param busid bus ID. Zero if not known. - * - * \return a file descriptor on success, or a negative value on error. - * - * \internal - * It calls drmOpenByBusid() if \p busid is specified or drmOpenByName() - * otherwise. - */ -int drmOpen(const char *name, const char *busid) -{ - - if (busid) return drmOpenByBusid(busid); - return drmOpenByName(name); -} - - -/** - * \brief Free the version information returned by drmGetVersion(). - * - * \param v pointer to the version information. - * - * \internal - * It frees the memory pointed by \p %v as well as all the non-null strings - * pointers in it. - */ -void drmFreeVersion(drmVersionPtr v) -{ - if (!v) return; - if (v->name) free(v->name); - if (v->date) free(v->date); - if (v->desc) free(v->desc); - free(v); -} - - -/** - * \brief Free the non-public version information returned by the kernel. - * - * \param v pointer to the version information. - * - * \internal - * Used by drmGetVersion() to free the memory pointed by \p %v as well as all - * the non-null strings pointers in it. - */ -static void drmFreeKernelVersion(drm_version_t *v) -{ - if (!v) return; - if (v->name) free(v->name); - if (v->date) free(v->date); - if (v->desc) free(v->desc); - free(v); -} - - -/** - * \brief Copy version information. - * - * \param d destination pointer. - * \param s source pointer. - * - * \internal - * Used by drmGetVersion() to translate the information returned by the ioctl - * interface in a private structure into the public structure counterpart. - */ -static void drmCopyVersion(drmVersionPtr d, const drm_version_t *s) -{ - d->version_major = s->version_major; - d->version_minor = s->version_minor; - d->version_patchlevel = s->version_patchlevel; - d->name_len = s->name_len; - d->name = strdup(s->name); - d->date_len = s->date_len; - d->date = strdup(s->date); - d->desc_len = s->desc_len; - d->desc = strdup(s->desc); -} - - -/** - * \brief Query the driver version information. - * - * \param fd file descriptor. - * - * \return pointer to a drmVersion structure which should be freed with - * drmFreeVersion(). - * - * \note Similar information is available via /proc/dri. - * - * \internal - * It gets the version information via successive DRM_IOCTL_VERSION ioctls, - * first with zeros to get the string lengths, and then the actually strings. - * It also null-terminates them since they might not be already. - */ -drmVersionPtr drmGetVersion(int fd) -{ - drmVersionPtr retval; - drm_version_t *version = malloc(sizeof(*version)); - - /* First, get the lengths */ - version->name_len = 0; - version->name = NULL; - version->date_len = 0; - version->date = NULL; - version->desc_len = 0; - version->desc = NULL; - - if (ioctl(fd, DRM_IOCTL_VERSION, version)) { - drmFreeKernelVersion(version); - return NULL; - } - - /* Now, allocate space and get the data */ - if (version->name_len) - version->name = malloc(version->name_len + 1); - if (version->date_len) - version->date = malloc(version->date_len + 1); - if (version->desc_len) - version->desc = malloc(version->desc_len + 1); - - if (ioctl(fd, DRM_IOCTL_VERSION, version)) { - drmFreeKernelVersion(version); - return NULL; - } - - /* The results might not be null-terminated - strings, so terminate them. */ - - if (version->name_len) version->name[version->name_len] = '\0'; - if (version->date_len) version->date[version->date_len] = '\0'; - if (version->desc_len) version->desc[version->desc_len] = '\0'; - - /* Now, copy it all back into the - client-visible data structure... */ - retval = malloc(sizeof(*retval)); - drmCopyVersion(retval, version); - drmFreeKernelVersion(version); - return retval; -} - - -/** - * \brief Get version information for the DRM user space library. - * - * This version number is driver independent. - * - * \param fd file descriptor. - * - * \return version information. - * - * \internal - * This function allocates and fills a drm_version structure with a hard coded - * version number. - */ -drmVersionPtr drmGetLibVersion(int fd) -{ - drm_version_t *version = malloc(sizeof(*version)); - - /* Version history: - * revision 1.0.x = original DRM interface with no drmGetLibVersion - * entry point and many drm<Device> extensions - * revision 1.1.x = added drmCommand entry points for device extensions - * added drmGetLibVersion to identify libdrm.a version - */ - version->version_major = 1; - version->version_minor = 1; - version->version_patchlevel = 0; - - return (drmVersionPtr)version; -} - - -/** - * \brief Free the bus ID information. - * - * \param busid bus ID information string as given by drmGetBusid(). - * - * \internal - * This function is just frees the memory pointed by \p busid. - */ -void drmFreeBusid(const char *busid) -{ - free((void *)busid); -} - - -/** - * \brief Get the bus ID of the device. - * - * \param fd file descriptor. - * - * \return bus ID string. - * - * \internal - * This function gets the bus ID via successive DRM_IOCTL_GET_UNIQUE ioctls to - * get the string length and data, passing the arguments in a drm_unique - * structure. - */ -char *drmGetBusid(int fd) -{ - drm_unique_t u; - - u.unique_len = 0; - u.unique = NULL; - - if (ioctl(fd, DRM_IOCTL_GET_UNIQUE, &u)) return NULL; - u.unique = malloc(u.unique_len + 1); - if (ioctl(fd, DRM_IOCTL_GET_UNIQUE, &u)) return NULL; - u.unique[u.unique_len] = '\0'; - return u.unique; -} - - -/** - * \brief Set the bus ID of the device. - * - * \param fd file descriptor. - * \param busid bus ID string. - * - * \return zero on success, negative on failure. - * - * \internal - * This function is a wrapper around the DRM_IOCTL_SET_UNIQUE ioctl, passing - * the arguments in a drm_unique structure. - */ -int drmSetBusid(int fd, const char *busid) -{ - drm_unique_t u; - - u.unique = (char *)busid; - u.unique_len = strlen(busid); - - if (ioctl(fd, DRM_IOCTL_SET_UNIQUE, &u)) { - return -errno; - } - return 0; -} - - -/** - * \brief Specifies a range of memory that is available for mapping by a - * non-root process. - * - * \param fd file descriptor. - * \param offset usually the physical address. The actual meaning depends of - * the \p type parameter. See below. - * \param size of the memory in bytes. - * \param type type of the memory to be mapped. - * \param flags combination of several flags to modify the function actions. - * \param handle will be set to a value that may be used as the offset - * parameter for mmap(). - * - * \return zero on success or a negative value on error. - * - * \par Mapping the frame buffer - * For the frame buffer - * - \p offset will be the physical address of the start of the frame buffer, - * - \p size will be the size of the frame buffer in bytes, and - * - \p type will be DRM_FRAME_BUFFER. - * - * \par - * The area mapped will be uncached. If MTRR support is available in the - * kernel, the frame buffer area will be set to write combining. - * - * \par Mapping the MMIO register area - * For the MMIO register area, - * - \p offset will be the physical address of the start of the register area, - * - \p size will be the size of the register area bytes, and - * - \p type will be DRM_REGISTERS. - * \par - * The area mapped will be uncached. - * - * \par Mapping the SAREA - * For the SAREA, - * - \p offset will be ignored and should be set to zero, - * - \p size will be the desired size of the SAREA in bytes, - * - \p type will be DRM_SHM. - * - * \par - * A shared memory area of the requested size will be created and locked in - * kernel memory. This area may be mapped into client-space by using the handle - * returned. - * - * \note May only be called by root. - * - * \internal - * This function is a wrapper around the DRM_IOCTL_ADD_MAP ioctl, passing - * the arguments in a drm_map structure. - */ -int drmAddMap(int fd, - drmHandle offset, - drmSize size, - drmMapType type, - drmMapFlags flags, - drmHandlePtr handle) -{ - drm_map_t map; - - map.offset = offset; - map.size = size; - map.handle = 0; - map.type = type; - map.flags = flags; - if (ioctl(fd, DRM_IOCTL_ADD_MAP, &map)) return -errno; - if (handle) *handle = (drmHandle)map.handle; - return 0; -} - - -/** - * \brief Make buffers available for DMA transfers. - * - * \param fd file descriptor. - * \param count number of buffers. - * \param size size of each buffer. - * \param flags buffer allocation flags. - * \param agp_offset offset in the AGP aperture - * - * \return number of buffers allocated, negative on error. - * - * \internal - * This function is a wrapper around DRM_IOCTL_ADD_BUFS ioctl. - * - * \sa drm_buf_desc. - */ -int drmAddBufs(int fd, int count, int size, drmBufDescFlags flags, - int agp_offset) -{ - drm_buf_desc_t request; - - request.count = count; - request.size = size; - request.low_mark = 0; - request.high_mark = 0; - request.flags = flags; - request.agp_start = agp_offset; - - if (ioctl(fd, DRM_IOCTL_ADD_BUFS, &request)) return -errno; - return request.count; -} - - -/** - * \brief Free buffers. - * - * \param fd file descriptor. - * \param count number of buffers to free. - * \param list list of buffers to be freed. - * - * \return zero on success, or a negative value on failure. - * - * \note This function is primarily used for debugging. - * - * \internal - * This function is a wrapper around the DRM_IOCTL_FREE_BUFS ioctl, passing - * the arguments in a drm_buf_free structure. - */ -int drmFreeBufs(int fd, int count, int *list) -{ - drm_buf_free_t request; - - request.count = count; - request.list = list; - if (ioctl(fd, DRM_IOCTL_FREE_BUFS, &request)) return -errno; - return 0; -} - - -/** - * \brief Close the device. - * - * \param fd file descriptor. - * - * \internal - * This function closes the file descriptor. - */ -int drmClose(int fd) -{ - drmMsg("close %d\n", fd); - return close(fd); -} - - -/** - * \brief Map a region of memory. - * - * \param fd file descriptor. - * \param handle handle returned by drmAddMap(). - * \param size size in bytes. Must match the size used by drmAddMap(). - * \param address will contain the user-space virtual address where the mapping - * begins. - * - * \return zero on success, or a negative value on failure. - * - * \internal - * This function is a wrapper for mmap(). - */ -int drmMap(int fd, - drmHandle handle, - drmSize size, - drmAddressPtr address) -{ - static unsigned long pagesize_mask = 0; - - if (fd < 0) return -EINVAL; - - if (!pagesize_mask) - pagesize_mask = getpagesize() - 1; - - size = (size + pagesize_mask) & ~pagesize_mask; - - *address = mmap(0, size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, handle); - if (*address == MAP_FAILED) return -errno; - return 0; -} - - -/** - * \brief Unmap mappings obtained with drmMap(). - * - * \param address address as given by drmMap(). - * \param size size in bytes. Must match the size used by drmMap(). - * - * \return zero on success, or a negative value on failure. - * - * \internal - * This function is a wrapper for unmap(). - */ -int drmUnmap(drmAddress address, drmSize size) -{ - return munmap(address, size); -} - - -/** - * \brief Map all DMA buffers into client-virtual space. - * - * \param fd file descriptor. - * - * \return a pointer to a ::drmBufMap structure. - * - * \note The client may not use these buffers until obtaining buffer indices - * with drmDMA(). - * - * \internal - * This function calls the DRM_IOCTL_MAP_BUFS ioctl and copies the returned - * information about the buffers in a drm_buf_map structure into the - * client-visible data structures. - */ -drmBufMapPtr drmMapBufs(int fd) -{ - drm_buf_map_t bufs; - drmBufMapPtr retval; - int i; - - bufs.count = 0; - bufs.list = NULL; - if (ioctl(fd, DRM_IOCTL_MAP_BUFS, &bufs)) return NULL; - - if (bufs.count) { - if (!(bufs.list = malloc(bufs.count * sizeof(*bufs.list)))) - return NULL; - - if (ioctl(fd, DRM_IOCTL_MAP_BUFS, &bufs)) { - free(bufs.list); - return NULL; - } - /* Now, copy it all back into the - client-visible data structures... */ - retval = malloc(sizeof(*retval)); - retval->count = bufs.count; - retval->list = malloc(bufs.count * sizeof(*retval->list)); - for (i = 0; i < bufs.count; i++) { - retval->list[i].idx = bufs.list[i].idx; - retval->list[i].total = bufs.list[i].total; - retval->list[i].used = 0; - retval->list[i].address = bufs.list[i].address; - } - return retval; - } - return NULL; -} - - -/** - * \brief Unmap buffers allocated with drmMapBufs(). - * - * \return zero on success, or negative value on failure. - * - * \internal - * Calls munmap() for every buffer stored in \p bufs. - */ -int drmUnmapBufs(drmBufMapPtr bufs) -{ - int i; - - for (i = 0; i < bufs->count; i++) { - munmap(bufs->list[i].address, bufs->list[i].total); - } - return 0; -} - - -#define DRM_DMA_RETRY 16 - -/** - * \brief Reserve DMA buffers. - * - * \param fd file descriptor. - * \param request - * - * \return zero on success, or a negative value on failure. - * - * \internal - * Assemble the arguments into a drm_dma structure and keeps issuing the - * DRM_IOCTL_DMA ioctl until success or until maximum number of retries. - */ -int drmDMA(int fd, drmDMAReqPtr request) -{ - drm_dma_t dma; - int ret, i = 0; - - /* Copy to hidden structure */ - dma.context = request->context; - dma.send_count = request->send_count; - dma.send_indices = request->send_list; - dma.send_sizes = request->send_sizes; - dma.flags = request->flags; - dma.request_count = request->request_count; - dma.request_size = request->request_size; - dma.request_indices = request->request_list; - dma.request_sizes = request->request_sizes; - - do { - ret = ioctl( fd, DRM_IOCTL_DMA, &dma ); - } while ( ret && errno == EAGAIN && i++ < DRM_DMA_RETRY ); - - if ( ret == 0 ) { - request->granted_count = dma.granted_count; - return 0; - } else { - return -errno; - } -} - - -/** - * \brief Obtain heavyweight hardware lock. - * - * \param fd file descriptor. - * \param context context. - * \param flags flags that determine the sate of the hardware when the function - * returns. - * - * \return always zero. - * - * \internal - * This function translates the arguments into a drm_lock structure and issue - * the DRM_IOCTL_LOCK ioctl until the lock is successfully acquired. - */ -int drmGetLock(int fd, drmContext context, drmLockFlags flags) -{ - drm_lock_t lock; - - lock.context = context; - lock.flags = 0; - if (flags & DRM_LOCK_READY) lock.flags |= _DRM_LOCK_READY; - if (flags & DRM_LOCK_QUIESCENT) lock.flags |= _DRM_LOCK_QUIESCENT; - if (flags & DRM_LOCK_FLUSH) lock.flags |= _DRM_LOCK_FLUSH; - if (flags & DRM_LOCK_FLUSH_ALL) lock.flags |= _DRM_LOCK_FLUSH_ALL; - if (flags & DRM_HALT_ALL_QUEUES) lock.flags |= _DRM_HALT_ALL_QUEUES; - if (flags & DRM_HALT_CUR_QUEUES) lock.flags |= _DRM_HALT_CUR_QUEUES; - - while (ioctl(fd, DRM_IOCTL_LOCK, &lock)) - ; - return 0; -} - -static void (*drm_unlock_callback)( void ) = 0; - -/** - * \brief Release the hardware lock. - * - * \param fd file descriptor. - * \param context context. - * - * \return zero on success, or a negative value on failure. - * - * \internal - * This function is a wrapper around the DRM_IOCTL_UNLOCK ioctl, passing the - * argument in a drm_lock structure. - */ -int drmUnlock(int fd, drmContext context) -{ - drm_lock_t lock; - int ret; - - lock.context = context; - lock.flags = 0; - ret = ioctl(fd, DRM_IOCTL_UNLOCK, &lock); - - /* Need this to synchronize vt releasing. Could also teach fbdev - * about the drm lock... - */ - if (drm_unlock_callback) { - drm_unlock_callback(); - } - - return ret; -} - - -/** - * \brief Create context. - * - * Used by the X server during GLXContext initialization. This causes - * per-context kernel-level resources to be allocated. - * - * \param fd file descriptor. - * \param handle is set on success. To be used by the client when requesting DMA - * dispatch with drmDMA(). - * - * \return zero on success, or a negative value on failure. - * - * \note May only be called by root. - * - * \internal - * This function is a wrapper around the DRM_IOCTL_ADD_CTX ioctl, passing the - * argument in a drm_ctx structure. - */ -int drmCreateContext(int fd, drmContextPtr handle) -{ - drm_ctx_t ctx; - - ctx.flags = 0; /* Modified with functions below */ - if (ioctl(fd, DRM_IOCTL_ADD_CTX, &ctx)) return -errno; - *handle = ctx.handle; - return 0; -} - - -/** - * \brief Destroy context. - * - * Free any kernel-level resources allocated with drmCreateContext() associated - * with the context. - * - * \param fd file descriptor. - * \param handle handle given by drmCreateContext(). - * - * \return zero on success, or a negative value on failure. - * - * \note May only be called by root. - * - * \internal - * This function is a wrapper around the DRM_IOCTL_RM_CTX ioctl, passing the - * argument in a drm_ctx structure. - */ -int drmDestroyContext(int fd, drmContext handle) -{ - drm_ctx_t ctx; - ctx.handle = handle; - if (ioctl(fd, DRM_IOCTL_RM_CTX, &ctx)) return -errno; - return 0; -} - - -/** - * \brief Acquire the AGP device. - * - * Must be called before any of the other AGP related calls. - * - * \param fd file descriptor. - * - * \return zero on success, or a negative value on failure. - * - * \internal - * This function is a wrapper around the DRM_IOCTL_AGP_ACQUIRE ioctl. - */ -int drmAgpAcquire(int fd) -{ - if (ioctl(fd, DRM_IOCTL_AGP_ACQUIRE, NULL)) return -errno; - return 0; -} - - -/** - * \brief Release the AGP device. - * - * \param fd file descriptor. - * - * \return zero on success, or a negative value on failure. - * - * \internal - * This function is a wrapper around the DRM_IOCTL_AGP_RELEASE ioctl. - */ -int drmAgpRelease(int fd) -{ - if (ioctl(fd, DRM_IOCTL_AGP_RELEASE, NULL)) return -errno; - return 0; -} - - -/** - * \brief Set the AGP mode. - * - * \param fd file descriptor. - * \param mode AGP mode. - * - * \return zero on success, or a negative value on failure. - * - * \internal - * This function is a wrapper around the DRM_IOCTL_AGP_ENABLE ioctl, passing the - * argument in a drm_agp_mode structure. - */ -int drmAgpEnable(int fd, unsigned long mode) -{ - drm_agp_mode_t m; - - m.mode = mode; - if (ioctl(fd, DRM_IOCTL_AGP_ENABLE, &m)) return -errno; - return 0; -} - - -/** - * \brief Allocate a chunk of AGP memory. - * - * \param fd file descriptor. - * \param size requested memory size in bytes. Will be rounded to page boundary. - * \param type type of memory to allocate. - * \param address if not zero, will be set to the physical address of the - * allocated memory. - * \param handle on success will be set to a handle of the allocated memory. - * - * \return zero on success, or a negative value on failure. - * - * \internal - * This function is a wrapper around the DRM_IOCTL_AGP_ALLOC ioctl, passing the - * arguments in a drm_agp_buffer structure. - */ -int drmAgpAlloc(int fd, unsigned long size, unsigned long type, - unsigned long *address, unsigned long *handle) -{ - drm_agp_buffer_t b; - *handle = 0; - b.size = size; - b.handle = 0; - b.type = type; - if (ioctl(fd, DRM_IOCTL_AGP_ALLOC, &b)) return -errno; - if (address != 0UL) *address = b.physical; - *handle = b.handle; - return 0; -} - - -/** - * \brief Free a chunk of AGP memory. - * - * \param fd file descriptor. - * \param handle handle to the allocated memory, as given by drmAgpAllocate(). - * - * \return zero on success, or a negative value on failure. - * - * \internal - * This function is a wrapper around the DRM_IOCTL_AGP_FREE ioctl, passing the - * argument in a drm_agp_buffer structure. - */ -int drmAgpFree(int fd, unsigned long handle) -{ - drm_agp_buffer_t b; - - b.size = 0; - b.handle = handle; - if (ioctl(fd, DRM_IOCTL_AGP_FREE, &b)) return -errno; - return 0; -} - - -/** - * \brief Bind a chunk of AGP memory. - * - * \param fd file descriptor. - * \param handle handle to the allocated memory, as given by drmAgpAllocate(). - * \param offset offset in bytes. It will round to page boundary. - * - * \return zero on success, or a negative value on failure. - * - * \internal - * This function is a wrapper around the DRM_IOCTL_AGP_BIND ioctl, passing the - * argument in a drm_agp_binding structure. - */ -int drmAgpBind(int fd, unsigned long handle, unsigned long offset) -{ - drm_agp_binding_t b; - - b.handle = handle; - b.offset = offset; - if (ioctl(fd, DRM_IOCTL_AGP_BIND, &b)) return -errno; - return 0; -} - - -/** - * \brief Unbind a chunk of AGP memory. - * - * \param fd file descriptor. - * \param handle handle to the allocated memory, as given by drmAgpAllocate(). - * - * \return zero on success, or a negative value on failure. - * - * \internal - * This function is a wrapper around the DRM_IOCTL_AGP_UNBIND ioctl, passing - * the argument in a drm_agp_binding structure. - */ -int drmAgpUnbind(int fd, unsigned long handle) -{ - drm_agp_binding_t b; - - b.handle = handle; - b.offset = 0; - if (ioctl(fd, DRM_IOCTL_AGP_UNBIND, &b)) return -errno; - return 0; -} - - -/** - * \brief Get AGP driver major version number. - * - * \param fd file descriptor. - * - * \return major version number on success, or a negative value on failure.. - * - * \internal - * This function is a wrapper around the DRM_IOCTL_AGP_INFO ioctl, getting the - * necessary information in a drm_agp_info structure. - */ -int drmAgpVersionMajor(int fd) -{ - drm_agp_info_t i; - - if (ioctl(fd, DRM_IOCTL_AGP_INFO, &i)) return -errno; - return i.agp_version_major; -} - - -/** - * \brief Get AGP driver minor version number. - * - * \param fd file descriptor. - * - * \return minor version number on success, or a negative value on failure. - * - * \internal - * This function is a wrapper around the DRM_IOCTL_AGP_INFO ioctl, getting the - * necessary information in a drm_agp_info structure. - */ -int drmAgpVersionMinor(int fd) -{ - drm_agp_info_t i; - - if (ioctl(fd, DRM_IOCTL_AGP_INFO, &i)) return -errno; - return i.agp_version_minor; -} - - -/** - * \brief Get AGP mode. - * - * \param fd file descriptor. - * - * \return mode on success, or zero on failure. - * - * \internal - * This function is a wrapper around the DRM_IOCTL_AGP_INFO ioctl, getting the - * necessary information in a drm_agp_info structure. - */ -unsigned long drmAgpGetMode(int fd) -{ - drm_agp_info_t i; - - if (ioctl(fd, DRM_IOCTL_AGP_INFO, &i)) return 0; - return i.mode; -} - - -/** - * \brief Get AGP aperture base. - * - * \param fd file descriptor. - * - * \return aperture base on success, zero on failure. - * - * \internal - * This function is a wrapper around the DRM_IOCTL_AGP_INFO ioctl, getting the - * necessary information in a drm_agp_info structure. - */ -unsigned long drmAgpBase(int fd) -{ - drm_agp_info_t i; - - if (ioctl(fd, DRM_IOCTL_AGP_INFO, &i)) return 0; - return i.aperture_base; -} - - -/** - * \brief Get AGP aperture size. - * - * \param fd file descriptor. - * - * \return aperture size on success, zero on failure. - * - * \internal - * This function is a wrapper around the DRM_IOCTL_AGP_INFO ioctl, getting the - * necessary information in a drm_agp_info structure. - */ -unsigned long drmAgpSize(int fd) -{ - drm_agp_info_t i; - - if (ioctl(fd, DRM_IOCTL_AGP_INFO, &i)) return 0; - return i.aperture_size; -} - - -/** - * \brief Get used AGP memory. - * - * \param fd file descriptor. - * - * \return memory used on success, or zero on failure. - * - * \internal - * This function is a wrapper around the DRM_IOCTL_AGP_INFO ioctl, getting the - * necessary information in a drm_agp_info structure. - */ -unsigned long drmAgpMemoryUsed(int fd) -{ - drm_agp_info_t i; - - if (ioctl(fd, DRM_IOCTL_AGP_INFO, &i)) return 0; - return i.memory_used; -} - - -/** - * \brief Get available AGP memory. - * - * \param fd file descriptor. - * - * \return memory available on success, or zero on failure. - * - * \internal - * This function is a wrapper around the DRM_IOCTL_AGP_INFO ioctl, getting the - * necessary information in a drm_agp_info structure. - */ -unsigned long drmAgpMemoryAvail(int fd) -{ - drm_agp_info_t i; - - if (ioctl(fd, DRM_IOCTL_AGP_INFO, &i)) return 0; - return i.memory_allowed; -} - - -/** - * \brief Get hardware vendor ID. - * - * \param fd file descriptor. - * - * \return vendor ID on success, or zero on failure. - * - * \internal - * This function is a wrapper around the DRM_IOCTL_AGP_INFO ioctl, getting the - * necessary information in a drm_agp_info structure. - */ -unsigned int drmAgpVendorId(int fd) -{ - drm_agp_info_t i; - - if (ioctl(fd, DRM_IOCTL_AGP_INFO, &i)) return 0; - return i.id_vendor; -} - - -/** - * \brief Get hardware device ID. - * - * \param fd file descriptor. - * - * \return zero on success, or zero on failure. - * - * \internal - * This function is a wrapper around the DRM_IOCTL_AGP_INFO ioctl, getting the - * necessary information in a drm_agp_info structure. - */ -unsigned int drmAgpDeviceId(int fd) -{ - drm_agp_info_t i; - - if (ioctl(fd, DRM_IOCTL_AGP_INFO, &i)) return 0; - return i.id_device; -} - -int drmScatterGatherAlloc(int fd, unsigned long size, unsigned long *handle) -{ - drm_scatter_gather_t sg; - - *handle = 0; - sg.size = size; - sg.handle = 0; - if (ioctl(fd, DRM_IOCTL_SG_ALLOC, &sg)) return -errno; - *handle = sg.handle; - return 0; -} - -int drmScatterGatherFree(int fd, unsigned long handle) -{ - drm_scatter_gather_t sg; - - sg.size = 0; - sg.handle = handle; - if (ioctl(fd, DRM_IOCTL_SG_FREE, &sg)) return -errno; - return 0; -} - -/** - * \brief Wait for VBLANK. - * - * \param fd file descriptor. - * \param vbl pointer to a drmVBlank structure. - * - * \return zero on success, or a negative value on failure. - * - * \internal - * This function is a wrapper around the DRM_IOCTL_WAIT_VBLANK ioctl. - */ -int drmWaitVBlank(int fd, drmVBlankPtr vbl) -{ - int ret; - - do { - ret = ioctl(fd, DRM_IOCTL_WAIT_VBLANK, vbl); - } while (ret && errno == EINTR); - - return ret; -} - - -/** - * \brief Install IRQ handler. - * - * \param fd file descriptor. - * \param irq IRQ number. - * - * \return zero on success, or a negative value on failure. - * - * \internal - * This function is a wrapper around the DRM_IOCTL_CONTROL ioctl, passing the - * argument in a drm_control structure. - */ -int drmCtlInstHandler(int fd, int irq) -{ - drm_control_t ctl; - - ctl.func = DRM_INST_HANDLER; - ctl.irq = irq; - if (ioctl(fd, DRM_IOCTL_CONTROL, &ctl)) return -errno; - return 0; -} - - -/** - * \brief Uninstall IRQ handler. - * - * \param fd file descriptor. - * - * \return zero on success, or a negative value on failure. - * - * \internal - * This function is a wrapper around the DRM_IOCTL_CONTROL ioctl, passing the - * argument in a drm_control structure. - */ -int drmCtlUninstHandler(int fd) -{ - drm_control_t ctl; - - ctl.func = DRM_UNINST_HANDLER; - ctl.irq = 0; - if (ioctl(fd, DRM_IOCTL_CONTROL, &ctl)) return -errno; - return 0; -} - - -/** - * \brief Get IRQ from bus ID. - * - * \param fd file descriptor. - * \param busnum bus number. - * \param devnum device number. - * \param funcnum function number. - * - * \return IRQ number on success, or a negative value on failure. - * - * \internal - * This function is a wrapper around the DRM_IOCTL_IRQ_BUSID ioctl, passing the - * arguments in a drm_irq_busid structure. - */ -int drmGetInterruptFromBusID(int fd, int busnum, int devnum, int funcnum) -{ - drm_irq_busid_t p; - - p.busnum = busnum; - p.devnum = devnum; - p.funcnum = funcnum; - if (ioctl(fd, DRM_IOCTL_IRQ_BUSID, &p)) return -errno; - return p.irq; -} - - -/** - * \brief Send a device-specific command. - * - * \param fd file descriptor. - * \param drmCommandIndex command index - * - * \return zero on success, or a negative value on failure. - * - * \internal - * It issues a ioctl given by - * \code DRM_COMMAND_BASE + drmCommandIndex \endcode. - */ -int drmCommandNone(int fd, unsigned long drmCommandIndex) -{ - void *data = NULL; /* dummy */ - unsigned long request; - - request = DRM_IO( DRM_COMMAND_BASE + drmCommandIndex); - - if (ioctl(fd, request, data)) { - return -errno; - } - return 0; -} - - -/** - * \brief Send a device-specific read command. - * - * \param fd file descriptor. - * \param drmCommandIndex command index - * \param data destination pointer of the data to be read. - * \param size size of the data to be read. - * - * \return zero on success, or a negative value on failure. - * - * \internal - * It issues a read ioctl given by - * \code DRM_COMMAND_BASE + drmCommandIndex \endcode. - */ -int drmCommandRead(int fd, unsigned long drmCommandIndex, - void *data, unsigned long size ) -{ - unsigned long request; - - request = DRM_IOC( DRM_IOC_READ, DRM_IOCTL_BASE, - DRM_COMMAND_BASE + drmCommandIndex, size); - - if (ioctl(fd, request, data)) { - return -errno; - } - return 0; -} - - -/** - * \brief Send a device-specific write command. - * - * \param fd file descriptor. - * \param drmCommandIndex command index - * \param data source pointer of the data to be written. - * \param size size of the data to be written. - * - * \return zero on success, or a negative value on failure. - * - * \internal - * It issues a write ioctl given by - * \code DRM_COMMAND_BASE + drmCommandIndex \endcode. - */ -int drmCommandWrite(int fd, unsigned long drmCommandIndex, - void *data, unsigned long size ) -{ - unsigned long request; - - request = DRM_IOC( DRM_IOC_WRITE, DRM_IOCTL_BASE, - DRM_COMMAND_BASE + drmCommandIndex, size); - - if (ioctl(fd, request, data)) { - return -errno; - } - return 0; -} - - -/** - * \brief Send a device-specific read-write command. - * - * \param fd file descriptor. - * \param drmCommandIndex command index - * \param data source pointer of the data to be read and written. - * \param size size of the data to be read and written. - * - * \return zero on success, or a negative value on failure. - * - * \internal - * It issues a read-write ioctl given by - * \code DRM_COMMAND_BASE + drmCommandIndex \endcode. - */ -int drmCommandWriteRead(int fd, unsigned long drmCommandIndex, - void *data, unsigned long size ) -{ - unsigned long request; - - request = DRM_IOC( DRM_IOC_READ|DRM_IOC_WRITE, DRM_IOCTL_BASE, - DRM_COMMAND_BASE + drmCommandIndex, size); - - if (ioctl(fd, request, data)) { - return -errno; - } - return 0; -} - |