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authorTvrtko Ursulin <tvrtko.ursulin@intel.com>2014-06-19 15:52:03 +0100
committerDamien Lespiau <damien.lespiau@intel.com>2014-09-17 12:15:57 +0100
commitae8edc7544e566084f7b958eb93c9109b471ca30 (patch)
treeeaa01b63273788dd1adbb99112765cba2dd1c3b0 /intel
parent86b37c61c78edd1353a3f76f678c39e2ec168771 (diff)
intel: Add support for userptr objects
Allow userptr objects to be created and used via libdrm_intel. At the moment tiling and mapping to GTT aperture is not supported due hardware limitations across different generations and uncertainty about its usefulness. v2: Improved error handling in feature detection per review comments. v3: Rebase on top of the drm_public addition, minor whitespace addition. Reviewed-by: Damien Lespiau <damien.lespiau@intel.com> Signed-off-by: Damien Lespiau <damien.lespiau@intel.com> (v3) Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> (v1,v2)
Diffstat (limited to 'intel')
-rw-r--r--intel/intel_bufmgr.c14
-rw-r--r--intel/intel_bufmgr.h5
-rw-r--r--intel/intel_bufmgr_gem.c163
-rw-r--r--intel/intel_bufmgr_priv.h12
4 files changed, 193 insertions, 1 deletions
diff --git a/intel/intel_bufmgr.c b/intel/intel_bufmgr.c
index 03dba503..234cd13e 100644
--- a/intel/intel_bufmgr.c
+++ b/intel/intel_bufmgr.c
@@ -62,6 +62,20 @@ drm_intel_bo_alloc_for_render(drm_intel_bufmgr *bufmgr, const char *name,
}
drm_public drm_intel_bo *
+drm_intel_bo_alloc_userptr(drm_intel_bufmgr *bufmgr,
+ const char *name, void *addr,
+ uint32_t tiling_mode,
+ uint32_t stride,
+ unsigned long size,
+ unsigned long flags)
+{
+ if (bufmgr->bo_alloc_userptr)
+ return bufmgr->bo_alloc_userptr(bufmgr, name, addr, tiling_mode,
+ stride, size, flags);
+ return NULL;
+}
+
+drm_public drm_intel_bo *
drm_intel_bo_alloc_tiled(drm_intel_bufmgr *bufmgr, const char *name,
int x, int y, int cpp, uint32_t *tiling_mode,
unsigned long *pitch, unsigned long flags)
diff --git a/intel/intel_bufmgr.h b/intel/intel_bufmgr.h
index 9383c722..be83a56a 100644
--- a/intel/intel_bufmgr.h
+++ b/intel/intel_bufmgr.h
@@ -113,6 +113,11 @@ drm_intel_bo *drm_intel_bo_alloc_for_render(drm_intel_bufmgr *bufmgr,
const char *name,
unsigned long size,
unsigned int alignment);
+drm_intel_bo *drm_intel_bo_alloc_userptr(drm_intel_bufmgr *bufmgr,
+ const char *name,
+ void *addr, uint32_t tiling_mode,
+ uint32_t stride, unsigned long size,
+ unsigned long flags);
drm_intel_bo *drm_intel_bo_alloc_tiled(drm_intel_bufmgr *bufmgr,
const char *name,
int x, int y, int cpp,
diff --git a/intel/intel_bufmgr_gem.c b/intel/intel_bufmgr_gem.c
index 4e34f75b..f378e5c9 100644
--- a/intel/intel_bufmgr_gem.c
+++ b/intel/intel_bufmgr_gem.c
@@ -187,6 +187,11 @@ struct _drm_intel_bo_gem {
void *mem_virtual;
/** GTT virtual address for the buffer, saved across map/unmap cycles */
void *gtt_virtual;
+ /**
+ * Virtual address of the buffer allocated by user, used for userptr
+ * objects only.
+ */
+ void *user_virtual;
int map_count;
drmMMListHead vma_list;
@@ -226,6 +231,11 @@ struct _drm_intel_bo_gem {
bool idle;
/**
+ * Boolean of whether this buffer was allocated with userptr
+ */
+ bool is_userptr;
+
+ /**
* Size in bytes of this buffer and its relocation descendents.
*
* Used to avoid costly tree walking in
@@ -852,6 +862,80 @@ drm_intel_gem_bo_alloc_tiled(drm_intel_bufmgr *bufmgr, const char *name,
tiling, stride);
}
+static drm_intel_bo *
+drm_intel_gem_bo_alloc_userptr(drm_intel_bufmgr *bufmgr,
+ const char *name,
+ void *addr,
+ uint32_t tiling_mode,
+ uint32_t stride,
+ unsigned long size,
+ unsigned long flags)
+{
+ drm_intel_bufmgr_gem *bufmgr_gem = (drm_intel_bufmgr_gem *) bufmgr;
+ drm_intel_bo_gem *bo_gem;
+ int ret;
+ struct drm_i915_gem_userptr userptr;
+
+ /* Tiling with userptr surfaces is not supported
+ * on all hardware so refuse it for time being.
+ */
+ if (tiling_mode != I915_TILING_NONE)
+ return NULL;
+
+ bo_gem = calloc(1, sizeof(*bo_gem));
+ if (!bo_gem)
+ return NULL;
+
+ bo_gem->bo.size = size;
+
+ VG_CLEAR(userptr);
+ userptr.user_ptr = (__u64)((unsigned long)addr);
+ userptr.user_size = size;
+ userptr.flags = flags;
+
+ ret = drmIoctl(bufmgr_gem->fd,
+ DRM_IOCTL_I915_GEM_USERPTR,
+ &userptr);
+ if (ret != 0) {
+ DBG("bo_create_userptr: "
+ "ioctl failed with user ptr %p size 0x%lx, "
+ "user flags 0x%lx\n", addr, size, flags);
+ free(bo_gem);
+ return NULL;
+ }
+
+ bo_gem->gem_handle = userptr.handle;
+ bo_gem->bo.handle = bo_gem->gem_handle;
+ bo_gem->bo.bufmgr = bufmgr;
+ bo_gem->is_userptr = true;
+ bo_gem->bo.virtual = addr;
+ /* Save the address provided by user */
+ bo_gem->user_virtual = addr;
+ bo_gem->tiling_mode = I915_TILING_NONE;
+ bo_gem->swizzle_mode = I915_BIT_6_SWIZZLE_NONE;
+ bo_gem->stride = 0;
+
+ DRMINITLISTHEAD(&bo_gem->name_list);
+ DRMINITLISTHEAD(&bo_gem->vma_list);
+
+ bo_gem->name = name;
+ atomic_set(&bo_gem->refcount, 1);
+ bo_gem->validate_index = -1;
+ bo_gem->reloc_tree_fences = 0;
+ bo_gem->used_as_reloc_target = false;
+ bo_gem->has_error = false;
+ bo_gem->reusable = false;
+
+ drm_intel_bo_gem_set_in_aperture_size(bufmgr_gem, bo_gem);
+
+ DBG("bo_create_userptr: "
+ "ptr %p buf %d (%s) size %ldb, stride 0x%x, tile mode %d\n",
+ addr, bo_gem->gem_handle, bo_gem->name,
+ size, stride, tiling_mode);
+
+ return &bo_gem->bo;
+}
+
/**
* Returns a drm_intel_bo wrapping the given buffer object handle.
*
@@ -1183,6 +1267,12 @@ static int drm_intel_gem_bo_map(drm_intel_bo *bo, int write_enable)
struct drm_i915_gem_set_domain set_domain;
int ret;
+ if (bo_gem->is_userptr) {
+ /* Return the same user ptr */
+ bo->virtual = bo_gem->user_virtual;
+ return 0;
+ }
+
pthread_mutex_lock(&bufmgr_gem->lock);
if (bo_gem->map_count++ == 0)
@@ -1251,6 +1341,9 @@ map_gtt(drm_intel_bo *bo)
drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo;
int ret;
+ if (bo_gem->is_userptr)
+ return -EINVAL;
+
if (bo_gem->map_count++ == 0)
drm_intel_gem_bo_open_vma(bufmgr_gem, bo_gem);
@@ -1397,13 +1490,18 @@ drm_intel_gem_bo_map_unsynchronized(drm_intel_bo *bo)
static int drm_intel_gem_bo_unmap(drm_intel_bo *bo)
{
- drm_intel_bufmgr_gem *bufmgr_gem = (drm_intel_bufmgr_gem *) bo->bufmgr;
+ drm_intel_bufmgr_gem *bufmgr_gem;
drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo;
int ret = 0;
if (bo == NULL)
return 0;
+ if (bo_gem->is_userptr)
+ return 0;
+
+ bufmgr_gem = (drm_intel_bufmgr_gem *) bo->bufmgr;
+
pthread_mutex_lock(&bufmgr_gem->lock);
if (bo_gem->map_count <= 0) {
@@ -1462,6 +1560,9 @@ drm_intel_gem_bo_subdata(drm_intel_bo *bo, unsigned long offset,
struct drm_i915_gem_pwrite pwrite;
int ret;
+ if (bo_gem->is_userptr)
+ return -EINVAL;
+
VG_CLEAR(pwrite);
pwrite.handle = bo_gem->gem_handle;
pwrite.offset = offset;
@@ -1514,6 +1615,9 @@ drm_intel_gem_bo_get_subdata(drm_intel_bo *bo, unsigned long offset,
struct drm_i915_gem_pread pread;
int ret;
+ if (bo_gem->is_userptr)
+ return -EINVAL;
+
VG_CLEAR(pread);
pread.handle = bo_gem->gem_handle;
pread.offset = offset;
@@ -2481,6 +2585,12 @@ drm_intel_gem_bo_set_tiling(drm_intel_bo *bo, uint32_t * tiling_mode,
drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo;
int ret;
+ /* Tiling with userptr surfaces is not supported
+ * on all hardware so refuse it for time being.
+ */
+ if (bo_gem->is_userptr)
+ return -EINVAL;
+
/* Linear buffers have no stride. By ensuring that we only ever use
* stride 0 with linear buffers, we simplify our code.
*/
@@ -3237,6 +3347,53 @@ drm_intel_bufmgr_gem_unref(drm_intel_bufmgr *bufmgr)
}
}
+static bool
+has_userptr(drm_intel_bufmgr_gem *bufmgr_gem)
+{
+ int ret;
+ void *ptr;
+ long pgsz;
+ struct drm_i915_gem_userptr userptr;
+ struct drm_gem_close close_bo;
+
+ pgsz = sysconf(_SC_PAGESIZE);
+ assert(pgsz > 0);
+
+ ret = posix_memalign(&ptr, pgsz, pgsz);
+ if (ret) {
+ DBG("Failed to get a page (%ld) for userptr detection!\n",
+ pgsz);
+ return false;
+ }
+
+ memset(&userptr, 0, sizeof(userptr));
+ userptr.user_ptr = (__u64)(unsigned long)ptr;
+ userptr.user_size = pgsz;
+
+retry:
+ ret = drmIoctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_USERPTR, &userptr);
+ if (ret) {
+ if (errno == ENODEV && userptr.flags == 0) {
+ userptr.flags = I915_USERPTR_UNSYNCHRONIZED;
+ goto retry;
+ }
+ free(ptr);
+ return false;
+ }
+
+ close_bo.handle = userptr.handle;
+ ret = drmIoctl(bufmgr_gem->fd, DRM_IOCTL_GEM_CLOSE, &close_bo);
+ if (ret == 0) {
+ free(ptr);
+ } else {
+ fprintf(stderr, "Failed to release test userptr object! (%d) "
+ "i915 kernel driver may not be sane!\n", errno);
+ return false;
+ }
+
+ return true;
+}
+
/**
* Initializes the GEM buffer manager, which uses the kernel to allocate, map,
* and manage map buffer objections.
@@ -3338,6 +3495,10 @@ drm_intel_bufmgr_gem_init(int fd, int batch_size)
ret = drmIoctl(bufmgr_gem->fd, DRM_IOCTL_I915_GETPARAM, &gp);
bufmgr_gem->has_relaxed_fencing = ret == 0;
+ if (has_userptr(bufmgr_gem))
+ bufmgr_gem->bufmgr.bo_alloc_userptr =
+ drm_intel_gem_bo_alloc_userptr;
+
gp.param = I915_PARAM_HAS_WAIT_TIMEOUT;
ret = drmIoctl(bufmgr_gem->fd, DRM_IOCTL_I915_GETPARAM, &gp);
bufmgr_gem->has_wait_timeout = ret == 0;
diff --git a/intel/intel_bufmgr_priv.h b/intel/intel_bufmgr_priv.h
index 2592d42d..59ebd186 100644
--- a/intel/intel_bufmgr_priv.h
+++ b/intel/intel_bufmgr_priv.h
@@ -62,6 +62,18 @@ struct _drm_intel_bufmgr {
unsigned int alignment);
/**
+ * Allocate a buffer object from an existing user accessible
+ * address malloc'd with the provided size.
+ * Alignment is used when mapping to the gtt.
+ * Flags may be I915_VMAP_READ_ONLY or I915_USERPTR_UNSYNCHRONIZED
+ */
+ drm_intel_bo *(*bo_alloc_userptr)(drm_intel_bufmgr *bufmgr,
+ const char *name, void *addr,
+ uint32_t tiling_mode, uint32_t stride,
+ unsigned long size,
+ unsigned long flags);
+
+ /**
* Allocate a tiled buffer object.
*
* Alignment for tiled objects is set automatically; the 'flags'