[PATCH] libkms/radeon: Add backend
nobled
nobled at dreamwidth.org
Thu Sep 9 10:07:21 PDT 2010
Todo: What tiling should be set on scanout buffers?
---
Haven't tested besides compiling it.
libkms/Makefile.am | 4 +
libkms/internal.h | 2 +
libkms/linux.c | 4 +
libkms/radeon.c | 242 ++++++++++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 252 insertions(+), 0 deletions(-)
create mode 100644 libkms/radeon.c
diff --git a/libkms/Makefile.am b/libkms/Makefile.am
index 2c75878..5c2e63f 100644
--- a/libkms/Makefile.am
+++ b/libkms/Makefile.am
@@ -26,6 +26,10 @@ if HAVE_NOUVEAU
libkms_la_SOURCES += nouveau.c
endif
+if HAVE_RADEON
+libkms_la_SOURCES += radeon.c
+endif
+
libkmsincludedir = ${includedir}/libkms
libkmsinclude_HEADERS = libkms.h
diff --git a/libkms/internal.h b/libkms/internal.h
index 63122d1..51f5e65 100644
--- a/libkms/internal.h
+++ b/libkms/internal.h
@@ -70,4 +70,6 @@ int intel_create(int fd, struct kms_driver **out);
int nouveau_create(int fd, struct kms_driver **out);
+int radeon_create(int fd, struct kms_driver **out);
+
#endif
diff --git a/libkms/linux.c b/libkms/linux.c
index 02182d3..7449abc 100644
--- a/libkms/linux.c
+++ b/libkms/linux.c
@@ -111,6 +111,10 @@ linux_from_sysfs(int fd, struct kms_driver **out)
else if (!strcmp(name, "nouveau"))
ret = nouveau_create(fd, out);
#endif
+#ifdef HAVE_RADEON
+ else if (!strcmp(name, "radeon"))
+ ret = radeon_create(fd, out);
+#endif
else
ret = -ENOSYS;
diff --git a/libkms/radeon.c b/libkms/radeon.c
new file mode 100644
index 0000000..f5e382a
--- /dev/null
+++ b/libkms/radeon.c
@@ -0,0 +1,242 @@
+/**************************************************************************
+ *
+ * Copyright © 2009 VMware, Inc., Palo Alto, CA., USA
+ * 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, sub license, 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 NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS, AUTHORS 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.
+ *
+ **************************************************************************/
+
+
+#define HAVE_STDINT_H
+#define _FILE_OFFSET_BITS 64
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "internal.h"
+
+#include <sys/mman.h>
+#include <sys/ioctl.h>
+#include "xf86drm.h"
+
+#include "radeon_drm.h"
+
+
+#define ALIGNMENT 512
+
+struct radeon_bo
+{
+ struct kms_bo base;
+ unsigned map_count;
+};
+
+static int
+radeon_get_prop(struct kms_driver *kms, unsigned key, unsigned *out)
+{
+ switch (key) {
+ case KMS_BO_TYPE:
+ *out = KMS_BO_TYPE_SCANOUT_X8R8G8B8 | KMS_BO_TYPE_CURSOR_64X64_A8R8G8B8;
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static int
+radeon_destroy(struct kms_driver *kms)
+{
+ free(kms);
+ return 0;
+}
+
+static int
+radeon_bo_create(struct kms_driver *kms,
+ const unsigned width, const unsigned height,
+ const enum kms_bo_type type, const unsigned *attr,
+ struct kms_bo **out)
+{
+ struct drm_radeon_gem_create arg;
+ unsigned size, pitch;
+ struct radeon_bo *bo;
+ int i, ret;
+
+ for (i = 0; attr[i]; i += 2) {
+ switch (attr[i]) {
+ case KMS_WIDTH:
+ case KMS_HEIGHT:
+ case KMS_BO_TYPE:
+ break;
+ default:
+ return -EINVAL;
+ }
+ }
+
+ switch (type) {
+ case KMS_BO_TYPE_CURSOR_64X64_A8R8G8B8:
+ pitch = 4 * 64;
+ size = 4 * 64 * 64;
+ break;
+ case KMS_BO_TYPE_SCANOUT_X8R8G8B8:
+ pitch = width * 4;
+ pitch = (pitch + ALIGNMENT - 1) & ~(ALIGNMENT - 1);
+ size = pitch * height;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ bo = calloc(1, sizeof(*bo));
+ if (!bo)
+ return -ENOMEM;
+
+ memset(&arg, 0, sizeof(arg));
+ arg.size = size;
+ arg.alignment = ALIGNMENT;
+ arg.initial_domain = RADEON_GEM_DOMAIN_CPU;
+ arg.flags = 0;
+ arg.handle = 0;
+
+ ret = drmCommandWriteRead(kms->fd, DRM_RADEON_GEM_CREATE,
+ &arg, sizeof(arg));
+ if (ret)
+ goto err_free;
+
+ bo->base.kms = kms;
+ bo->base.handle = arg.handle;
+ bo->base.size = size;
+ bo->base.pitch = pitch;
+ bo->base.offset = 0;
+ bo->map_count = 0;
+
+ *out = &bo->base;
+
+ return 0;
+
+err_free:
+ free(bo);
+ return ret;
+}
+
+static int
+radeon_bo_get_prop(struct kms_bo *bo, unsigned key, unsigned *out)
+{
+ switch (key) {
+ default:
+ return -EINVAL;
+ }
+}
+
+static int
+radeon_bo_map(struct kms_bo *_bo, void **out)
+{
+ struct radeon_bo *bo = (struct radeon_bo *)_bo;
+ struct drm_radeon_gem_mmap arg;
+ void *map = NULL;
+ int ret;
+
+ if (bo->base.ptr) {
+ bo->map_count++;
+ *out = bo->base.ptr;
+ return 0;
+ }
+
+ memset(&arg, 0, sizeof(arg));
+ arg.handle = bo->base.handle;
+ arg.offset = bo->base.offset;
+ arg.size = (uint64_t)bo->base.size;
+
+ ret = drmCommandWriteRead(bo->base.kms->fd, DRM_RADEON_GEM_MMAP,
+ &arg, sizeof(arg));
+ if (ret)
+ return -errno;
+
+ map = mmap(0, arg.size, PROT_READ | PROT_WRITE, MAP_SHARED,
+ bo->base.kms->fd, arg.addr_ptr);
+ if (map == MAP_FAILED)
+ return -errno;
+
+ bo->base.ptr = map;
+ bo->map_count++;
+ *out = bo->base.ptr;
+
+ return 0;
+}
+
+static int
+radeon_bo_unmap(struct kms_bo *_bo)
+{
+ struct radeon_bo *bo = (struct radeon_bo *)_bo;
+ if (--bo->map_count == 0) {
+ munmap(bo->base.ptr, bo->base.size);
+ bo->base.ptr = NULL;
+ }
+ return 0;
+}
+
+static int
+radeon_bo_destroy(struct kms_bo *_bo)
+{
+ struct radeon_bo *bo = (struct radeon_bo *)_bo;
+ struct drm_gem_close arg;
+ int ret;
+
+ if (bo->base.ptr) {
+ /* XXX Sanity check map_count */
+ munmap(bo->base.ptr, bo->base.size);
+ bo->base.ptr = NULL;
+ }
+
+ memset(&arg, 0, sizeof(arg));
+ arg.handle = bo->base.handle;
+
+ ret = drmIoctl(bo->base.kms->fd, DRM_IOCTL_GEM_CLOSE, &arg);
+ if (ret)
+ return -errno;
+
+ free(bo);
+ return 0;
+}
+
+int
+radeon_create(int fd, struct kms_driver **out)
+{
+ struct kms_driver *kms;
+
+ kms = calloc(1, sizeof(*kms));
+ if (!kms)
+ return -ENOMEM;
+
+ kms->fd = fd;
+
+ kms->bo_create = radeon_bo_create;
+ kms->bo_map = radeon_bo_map;
+ kms->bo_unmap = radeon_bo_unmap;
+ kms->bo_get_prop = radeon_bo_get_prop;
+ kms->bo_destroy = radeon_bo_destroy;
+ kms->get_prop = radeon_get_prop;
+ kms->destroy = radeon_destroy;
+ *out = kms;
+
+ return 0;
+}
--
1.7.0.2
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