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-rw-r--r--linux-core/drmP.h12
-rw-r--r--linux-core/drm_agpsupport.c165
2 files changed, 177 insertions, 0 deletions
diff --git a/linux-core/drmP.h b/linux-core/drmP.h
index 33d8ecc2..8f8f324e 100644
--- a/linux-core/drmP.h
+++ b/linux-core/drmP.h
@@ -850,6 +850,16 @@ typedef struct drm_device {
} drm_device_t;
+#if __OS_HAS_AGP
+typedef struct drm_agp_ttm_priv {
+ DRM_AGP_MEM *mem;
+ struct agp_bridge_data *bridge;
+ unsigned mem_type;
+ int populated;
+} drm_agp_ttm_priv;
+#endif
+
+
static __inline__ int drm_core_check_feature(struct drm_device *dev,
int feature)
{
@@ -1162,6 +1172,8 @@ extern DRM_AGP_MEM *drm_agp_allocate_memory(struct agp_bridge_data *bridge, size
extern int drm_agp_free_memory(DRM_AGP_MEM * handle);
extern int drm_agp_bind_memory(DRM_AGP_MEM * handle, off_t start);
extern int drm_agp_unbind_memory(DRM_AGP_MEM * handle);
+extern drm_ttm_backend_t *drm_agp_init_ttm_cached(struct drm_device *dev);
+extern drm_ttm_backend_t *drm_agp_init_ttm_uncached(struct drm_device *dev);
/* Stub support (drm_stub.h) */
extern int drm_get_dev(struct pci_dev *pdev, const struct pci_device_id *ent,
diff --git a/linux-core/drm_agpsupport.c b/linux-core/drm_agpsupport.c
index dce27cdf..92868005 100644
--- a/linux-core/drm_agpsupport.c
+++ b/linux-core/drm_agpsupport.c
@@ -552,4 +552,169 @@ int drm_agp_unbind_memory(DRM_AGP_MEM * handle)
return agp_unbind_memory(handle);
}
+/*
+ * AGP ttm backend interface.
+ */
+
+static int drm_agp_needs_cache_adjust_true(drm_ttm_backend_t *backend) {
+ return TRUE;
+}
+
+static int drm_agp_needs_cache_adjust_false(drm_ttm_backend_t *backend) {
+ return FALSE;
+}
+
+#define AGP_MEM_USER (1 << 16)
+#define AGP_MEM_UCACHED (2 << 16)
+
+static int drm_agp_populate(drm_ttm_backend_t *backend, unsigned long num_pages,
+ struct page **pages) {
+
+ drm_agp_ttm_priv *agp_priv = (drm_agp_ttm_priv *) backend->private;
+ struct page **cur_page, **last_page = pages + num_pages;
+ DRM_AGP_MEM *mem;
+
+ DRM_DEBUG("drm_agp_populate_ttm\n");
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,11)
+ mem = drm_agp_allocate_memory(num_pages, agp_priv->mem_type);
+#else
+ mem = drm_agp_allocate_memory(agp_priv->bridge, num_pages, agp_priv->mem_type);
+#endif
+ if (!mem)
+ return -1;
+
+ DRM_DEBUG("Current page count is %ld\n", (long) mem->page_count);
+ mem->page_count = 0;
+ for (cur_page = pages; cur_page < last_page; ++cur_page) {
+ mem->memory[mem->page_count++] = page_to_phys(*cur_page);
+ }
+ agp_priv->mem = mem;
+ return 0;
+}
+
+static int drm_agp_bind_ttm(drm_ttm_backend_t *backend, unsigned long offset) {
+
+ drm_agp_ttm_priv *agp_priv = (drm_agp_ttm_priv *) backend->private;
+ DRM_AGP_MEM *mem = agp_priv->mem;
+ int ret;
+
+ DRM_DEBUG("drm_agp_bind_ttm\n");
+ mem->is_flushed = FALSE;
+ ret = drm_agp_bind_memory(mem, offset);
+ if (ret) {
+ DRM_ERROR("AGP Bind memory failed\n");
+ }
+ return ret;
+}
+
+static int drm_agp_unbind_ttm(drm_ttm_backend_t *backend) {
+
+ drm_agp_ttm_priv *agp_priv = (drm_agp_ttm_priv *) backend->private;
+
+ DRM_DEBUG("drm_agp_unbind_ttm\n");
+ if (agp_priv->mem->is_bound)
+ return drm_agp_unbind_memory(agp_priv->mem);
+ else
+ return 0;
+}
+
+static void drm_agp_clear_ttm(drm_ttm_backend_t *backend) {
+
+ drm_agp_ttm_priv *agp_priv = (drm_agp_ttm_priv *) backend->private;
+ DRM_AGP_MEM *mem = agp_priv->mem;
+
+ DRM_DEBUG("drm_agp_clear_ttm\n");
+ if (mem) {
+ if (mem->is_bound) {
+ drm_agp_unbind_memory(mem);
+ }
+ agp_free_memory(mem);
+ }
+ agp_priv->mem = NULL;
+}
+
+static void drm_agp_destroy_ttm(drm_ttm_backend_t *backend) {
+
+ drm_agp_ttm_priv *agp_priv;
+
+ if (backend) {
+ DRM_DEBUG("drm_agp_destroy_ttm\n");
+ agp_priv = (drm_agp_ttm_priv *) backend->private;
+ if (agp_priv) {
+ if (agp_priv->mem) {
+ drm_agp_clear_ttm(backend);
+ }
+ drm_free(agp_priv, sizeof(*agp_priv), DRM_MEM_MAPPINGS);
+ }
+ drm_free(backend, sizeof(*backend), DRM_MEM_MAPPINGS);
+ }
+}
+
+
+drm_ttm_backend_t *drm_agp_init_ttm_uncached(struct drm_device *dev) {
+
+ drm_ttm_backend_t *agp_be;
+ drm_agp_ttm_priv *agp_priv;
+
+ agp_be = drm_calloc(1, sizeof(*agp_be), DRM_MEM_MAPPINGS);
+
+ if (!agp_be)
+ return NULL;
+
+ agp_priv = drm_calloc(1, sizeof(agp_priv), DRM_MEM_MAPPINGS);
+
+ if (!agp_priv) {
+ drm_free(agp_be, sizeof(*agp_be), DRM_MEM_MAPPINGS);
+ return NULL;
+ }
+
+ agp_priv->mem = NULL;
+ agp_priv->mem_type = AGP_MEM_USER;
+ agp_priv->bridge = dev->agp->bridge;
+ agp_priv->populated = FALSE;
+ agp_be->aperture_base = dev->agp->agp_info.aper_base;
+ agp_be->private = (void *) agp_priv;
+ agp_be->needs_cache_adjust = drm_agp_needs_cache_adjust_true;
+ agp_be->populate = drm_agp_populate;
+ agp_be->clear = drm_agp_clear_ttm;
+ agp_be->bind = drm_agp_bind_ttm;
+ agp_be->unbind = drm_agp_unbind_ttm;
+ agp_be->destroy = drm_agp_destroy_ttm;
+ return agp_be;
+}
+
+
+drm_ttm_backend_t *drm_agp_init_ttm_cached(struct drm_device *dev) {
+
+ drm_ttm_backend_t *agp_be;
+ drm_agp_ttm_priv *agp_priv;
+
+ agp_be = drm_calloc(1, sizeof(*agp_be), DRM_MEM_MAPPINGS);
+
+ if (!agp_be)
+ return NULL;
+
+ agp_priv = drm_calloc(1, sizeof(agp_priv), DRM_MEM_MAPPINGS);
+
+ if (!agp_priv) {
+ drm_free(agp_be, sizeof(*agp_be), DRM_MEM_MAPPINGS);
+ return NULL;
+ }
+
+ agp_priv->mem = NULL;
+ agp_priv->mem_type = AGP_MEM_UCACHED;
+ agp_priv->bridge = dev->agp->bridge;
+ agp_priv->populated = FALSE;
+ agp_be->aperture_base = dev->agp->agp_info.aper_base;
+ agp_be->private = (void *) agp_priv;
+ agp_be->needs_cache_adjust = drm_agp_needs_cache_adjust_false;
+ agp_be->populate = drm_agp_populate;
+ agp_be->clear = drm_agp_clear_ttm;
+ agp_be->bind = drm_agp_bind_ttm;
+ agp_be->unbind = drm_agp_unbind_ttm;
+ agp_be->destroy = drm_agp_destroy_ttm;
+ return agp_be;
+}
+
+
#endif /* __OS_HAS_AGP */