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lib: adding drm_open_driver() interface

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The drm_open_driver*() functions replace the drm_open_any*() functions and
provide the same utility, but in a way that is platform agnostic, not
intel-specific.  This opens the path for adopting intel-gpu-tools to non-intel
platforms.

This commit renames the calls and adds the chipset parameter which can be used
to restrict the opening to a specific hardware family.  For example,
drm_open_driver(DRIVER_INTEL) will only return a valid fd if an intel GPU is
found on the system, along with performing intel-specific initialization stuff
like gem_quiescent_gpu(), et al.  If OPEN_ANY_GPU is specified, the first
available drm device of any type will be opened.

Other hardware type flags may be added in the future.

The drm_open_any*() calls are retained as aliases of
drm_open_driver*(OPEN_ANY_GPU) but will be removed in a subsequent patch.

Signed-off-by: Micah Fedke <micah.fedke@collabora.co.uk>
Signed-off-by: Thomas Wood <thomas.wood@intel.com>
This commit is contained in:
Micah Fedke 2015-07-22 21:42:51 +00:00 committed by Thomas Wood
parent 2bacd07eb3
commit e2241805a4
2 changed files with 75 additions and 40 deletions
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97
lib/drmtest.c
View File

@ -75,23 +75,32 @@
uint16_t __drm_device_id;
static int is_i915_device(int fd)
static int __get_drm_device_name(int fd, char *name)
{
drm_version_t version;
char name[5] = "";
memset(&version, 0, sizeof(version));
version.name_len = 4;
version.name = name;
if (drmIoctl(fd, DRM_IOCTL_VERSION, &version))
if (!drmIoctl(fd, DRM_IOCTL_VERSION, &version)){
return 0;
}
return strcmp("i915", name) == 0;
return -1;
}
static int
is_intel(int fd)
static bool is_i915_device(int fd)
{
int ret;
char name[5] = "";
ret = __get_drm_device_name(fd, name);
return !ret && strcmp("i915", name) == 0;
}
static bool is_intel(int fd)
{
struct drm_i915_getparam gp;
int devid = 0;
@ -101,13 +110,13 @@ is_intel(int fd)
gp.value = &devid;
if (ioctl(fd, DRM_IOCTL_I915_GETPARAM, &gp, sizeof(gp)))
return 0;
return false;
if (!IS_INTEL(devid))
return 0;
return false;
__drm_device_id = devid;
return 1;
return true;
}
static void check_stop_rings(void)
@ -230,19 +239,31 @@ int drm_get_card(void)
return -1;
}
/** Open the first DRM device we can find, searching up to 16 device nodes */
int __drm_open_any(void)
/**
* __drm_open_driver:
*
* Open the first DRM device we can find, searching up to 16 device nodes
*
* @chipset: OR'd flags for each chipset to search, eg. DRIVER_INTEL
*
* Returns:
* An open DRM fd or -1 on error
*/
int __drm_open_driver(int chipset)
{
for (int i = 0; i < 16; i++) {
char name[80];
int fd;
bool found_intel;
sprintf(name, "/dev/dri/card%u", i);
fd = open(name, O_RDWR);
if (fd == -1)
continue;
if (is_i915_device(fd) && is_intel(fd))
found_intel = is_i915_device(fd) && is_intel(fd) && (chipset & DRIVER_INTEL);
if ((chipset & DRIVER_ANY) || found_intel)
return fd;
close(fd);
@ -252,7 +273,7 @@ int __drm_open_any(void)
return -1;
}
static int __drm_open_any_render(void)
static int __drm_open_driver_render(int chipset)
{
char *name;
int i, fd;
@ -307,41 +328,43 @@ static void quiescent_gpu_at_exit_render(int sig)
}
/**
* drm_open_any:
* drm_open_driver:
*
* Open an i915 drm legacy device node. This function always returns a valid
* Open a drm legacy device node. This function always returns a valid
* file descriptor.
*
* Returns: a i915 drm file descriptor
* Returns: a drm file descriptor
*/
int drm_open_any(void)
int drm_open_driver(int chipset)
{
static int open_count;
int fd = __drm_open_any();
int fd = __drm_open_driver(chipset);
igt_require(fd >= 0);
if (__sync_fetch_and_add(&open_count, 1))
return fd;
gem_quiescent_gpu(fd);
at_exit_drm_fd = __drm_open_any();
igt_install_exit_handler(quiescent_gpu_at_exit);
if(chipset & DRIVER_INTEL){
gem_quiescent_gpu(fd);
igt_install_exit_handler(quiescent_gpu_at_exit);
}
at_exit_drm_fd = __drm_open_driver(chipset);
return fd;
}
/**
* drm_open_any_master:
* drm_open_driver_master:
*
* Open an i915 drm legacy device node and ensure that it is drm master.
* Open a drm legacy device node and ensure that it is drm master.
*
* Returns:
* The i915 drm file descriptor or -1 on error
* The drm file descriptor or -1 on error
*/
int drm_open_any_master(void)
int drm_open_driver_master(int chipset)
{
int fd = drm_open_any();
int fd = drm_open_driver(chipset);
igt_require(fd >= 0);
igt_require_f(drmSetMaster(fd) == 0, "Can't become DRM master, "
@ -351,28 +374,30 @@ int drm_open_any_master(void)
}
/**
* drm_open_any_render:
* drm_open_driver_render:
*
* Open an i915 drm render device node.
* Open a drm render device node.
*
* Returns:
* The i915 drm file descriptor or -1 on error
* The drm file descriptor or -1 on error
*/
int drm_open_any_render(void)
int drm_open_driver_render(int chipset)
{
static int open_count;
int fd = __drm_open_any_render();
int fd = __drm_open_driver_render(chipset);
/* no render nodes, fallback to drm_open_any() */
/* no render nodes, fallback to drm_open_driver() */
if (fd == -1)
return drm_open_any();
return drm_open_driver(chipset);
if (__sync_fetch_and_add(&open_count, 1))
return fd;
at_exit_drm_render_fd = __drm_open_any();
gem_quiescent_gpu(fd);
igt_install_exit_handler(quiescent_gpu_at_exit_render);
at_exit_drm_render_fd = __drm_open_driver(chipset);
if(chipset & DRIVER_INTEL){
gem_quiescent_gpu(fd);
igt_install_exit_handler(quiescent_gpu_at_exit_render);
}
return fd;
}

18
lib/drmtest.h
View File

@ -38,6 +38,16 @@
#include "intel_batchbuffer.h"
#define DRIVER_ANY 0x1
#define DRIVER_INTEL (0x1 << 1)
/* provide the deprecated drm_open_any*() calls */
#define drm_open_any() drm_open_driver(DRIVER_ANY)
#define drm_open_any_master() drm_open_driver_master(DRIVER_ANY)
#define drm_open_any_render() drm_open_driver_render(DRIVER_ANY)
#define __drm_open_any() __drm_open_driver(DRIVER_ANY)
#ifdef ANDROID
#if (!(defined HAVE_MMAP64)) && (!(defined __x86_64__))
extern void* __mmap2(void *, size_t, int, int, int, off_t);
@ -71,10 +81,10 @@ static inline void *igt_mmap64(void *addr, size_t length, int prot, int flags,
#define ALIGN(v, a) (((v) + (a)-1) & ~((a)-1))
int drm_get_card(void);
int __drm_open_any(void);
int drm_open_any(void);
int drm_open_any_master(void);
int drm_open_any_render(void);
int drm_open_driver(int chipset);
int drm_open_driver_master(int chipset);
int drm_open_driver_render(int chipset);
int __drm_open_driver(int chipset);
void gem_quiescent_gpu(int fd);