1 files changed, 274 insertions, 0 deletions

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_context.c b/drivers/gpu/drm/vmwgfx/vmwgfx_context.c
new file mode 100644
index 000000000000..00ae0925aca8
--- /dev/null
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_context.c
@@ -0,0 +1,274 @@
+/**************************************************************************
+ *
+ * Copyright © 2009-2012 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.
+ *
+ **************************************************************************/
+
+#include "vmwgfx_drv.h"
+#include "vmwgfx_resource_priv.h"
+#include "ttm/ttm_placement.h"
+
+struct vmw_user_context {
+        struct ttm_base_object base;
+        struct vmw_resource res;
+};
+
+static void vmw_user_context_free(struct vmw_resource *res);
+static struct vmw_resource *
+vmw_user_context_base_to_res(struct ttm_base_object *base);
+
+static uint64_t vmw_user_context_size;
+
+static const struct vmw_user_resource_conv user_context_conv = {
+        .object_type = VMW_RES_CONTEXT,
+        .base_obj_to_res = vmw_user_context_base_to_res,
+        .res_free = vmw_user_context_free
+};
+
+const struct vmw_user_resource_conv *user_context_converter =
+        &user_context_conv;
+
+
+static const struct vmw_res_func vmw_legacy_context_func = {
+        .res_type = vmw_res_context,
+        .needs_backup = false,
+        .may_evict = false,
+        .type_name = "legacy contexts",
+        .backup_placement = NULL,
+        .create = NULL,
+        .destroy = NULL,
+        .bind = NULL,
+        .unbind = NULL
+};
+
+/**
+ * Context management:
+ */
+
+static void vmw_hw_context_destroy(struct vmw_resource *res)
+{
+
+        struct vmw_private *dev_priv = res->dev_priv;
+        struct {
+                SVGA3dCmdHeader header;
+                SVGA3dCmdDestroyContext body;
+        } *cmd;
+
+
+        vmw_execbuf_release_pinned_bo(dev_priv);
+        cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
+        if (unlikely(cmd == NULL)) {
+                DRM_ERROR("Failed reserving FIFO space for surface "
+                          "destruction.\n");
+                return;
+        }
+
+        cmd->header.id = cpu_to_le32(SVGA_3D_CMD_CONTEXT_DESTROY);
+        cmd->header.size = cpu_to_le32(sizeof(cmd->body));
+        cmd->body.cid = cpu_to_le32(res->id);
+
+        vmw_fifo_commit(dev_priv, sizeof(*cmd));
+        vmw_3d_resource_dec(dev_priv, false);
+}
+
+static int vmw_context_init(struct vmw_private *dev_priv,
+                            struct vmw_resource *res,
+                            void (*res_free) (struct vmw_resource *res))
+{
+        int ret;
+
+        struct {
+                SVGA3dCmdHeader header;
+                SVGA3dCmdDefineContext body;
+        } *cmd;
+
+        ret = vmw_resource_init(dev_priv, res, false,
+                                res_free, &vmw_legacy_context_func);
+
+        if (unlikely(ret != 0)) {
+                DRM_ERROR("Failed to allocate a resource id.\n");
+                goto out_early;
+        }
+
+        if (unlikely(res->id >= SVGA3D_MAX_CONTEXT_IDS)) {
+                DRM_ERROR("Out of hw context ids.\n");
+                vmw_resource_unreference(&res);
+                return -ENOMEM;
+        }
+
+        cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
+        if (unlikely(cmd == NULL)) {
+                DRM_ERROR("Fifo reserve failed.\n");
+                vmw_resource_unreference(&res);
+                return -ENOMEM;
+        }
+
+        cmd->header.id = cpu_to_le32(SVGA_3D_CMD_CONTEXT_DEFINE);
+        cmd->header.size = cpu_to_le32(sizeof(cmd->body));
+        cmd->body.cid = cpu_to_le32(res->id);
+
+        vmw_fifo_commit(dev_priv, sizeof(*cmd));
+        (void) vmw_3d_resource_inc(dev_priv, false);
+        vmw_resource_activate(res, vmw_hw_context_destroy);
+        return 0;
+
+out_early:
+        if (res_free == NULL)
+                kfree(res);
+        else
+                res_free(res);
+        return ret;
+}
+
+struct vmw_resource *vmw_context_alloc(struct vmw_private *dev_priv)
+{
+        struct vmw_resource *res = kmalloc(sizeof(*res), GFP_KERNEL);
+        int ret;
+
+        if (unlikely(res == NULL))
+                return NULL;
+
+        ret = vmw_context_init(dev_priv, res, NULL);
+
+        return (ret == 0) ? res : NULL;
+}
+
+/**
+ * User-space context management:
+ */
+
+static struct vmw_resource *
+vmw_user_context_base_to_res(struct ttm_base_object *base)
+{
+        return &(container_of(base, struct vmw_user_context, base)->res);
+}
+
+static void vmw_user_context_free(struct vmw_resource *res)
+{
+        struct vmw_user_context *ctx =
+            container_of(res, struct vmw_user_context, res);
+        struct vmw_private *dev_priv = res->dev_priv;
+
+        ttm_base_object_kfree(ctx, base);
+        ttm_mem_global_free(vmw_mem_glob(dev_priv),
+                            vmw_user_context_size);
+}
+
+/**
+ * This function is called when user space has no more references on the
+ * base object. It releases the base-object's reference on the resource object.
+ */
+
+static void vmw_user_context_base_release(struct ttm_base_object **p_base)
+{
+        struct ttm_base_object *base = *p_base;
+        struct vmw_user_context *ctx =
+            container_of(base, struct vmw_user_context, base);
+        struct vmw_resource *res = &ctx->res;
+
+        *p_base = NULL;
+        vmw_resource_unreference(&res);
+}
+
+int vmw_context_destroy_ioctl(struct drm_device *dev, void *data,
+                              struct drm_file *file_priv)
+{
+        struct drm_vmw_context_arg *arg = (struct drm_vmw_context_arg *)data;
+        struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
+
+        return ttm_ref_object_base_unref(tfile, arg->cid, TTM_REF_USAGE);
+}
+
+int vmw_context_define_ioctl(struct drm_device *dev, void *data,
+                             struct drm_file *file_priv)
+{
+        struct vmw_private *dev_priv = vmw_priv(dev);
+        struct vmw_user_context *ctx;
+        struct vmw_resource *res;
+        struct vmw_resource *tmp;
+        struct drm_vmw_context_arg *arg = (struct drm_vmw_context_arg *)data;
+        struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
+        struct vmw_master *vmaster = vmw_master(file_priv->master);
+        int ret;
+
+
+        /*
+         * Approximate idr memory usage with 128 bytes. It will be limited
+         * by maximum number_of contexts anyway.
+         */
+
+        if (unlikely(vmw_user_context_size == 0))
+                vmw_user_context_size = ttm_round_pot(sizeof(*ctx)) + 128;
+
+        ret = ttm_read_lock(&vmaster->lock, true);
+        if (unlikely(ret != 0))
+                return ret;
+
+        ret = ttm_mem_global_alloc(vmw_mem_glob(dev_priv),
+                                   vmw_user_context_size,
+                                   false, true);
+        if (unlikely(ret != 0)) {
+                if (ret != -ERESTARTSYS)
+                        DRM_ERROR("Out of graphics memory for context"
+                                  " creation.\n");
+                goto out_unlock;
+        }
+
+        ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
+        if (unlikely(ctx == NULL)) {
+                ttm_mem_global_free(vmw_mem_glob(dev_priv),
+                                    vmw_user_context_size);
+                ret = -ENOMEM;
+                goto out_unlock;
+        }
+
+        res = &ctx->res;
+        ctx->base.shareable = false;
+        ctx->base.tfile = NULL;
+
+        /*
+         * From here on, the destructor takes over resource freeing.
+         */
+
+        ret = vmw_context_init(dev_priv, res, vmw_user_context_free);
+        if (unlikely(ret != 0))
+                goto out_unlock;
+
+        tmp = vmw_resource_reference(&ctx->res);
+        ret = ttm_base_object_init(tfile, &ctx->base, false, VMW_RES_CONTEXT,
+                                   &vmw_user_context_base_release, NULL);
+
+        if (unlikely(ret != 0)) {
+                vmw_resource_unreference(&tmp);
+                goto out_err;
+        }
+
+        arg->cid = ctx->base.hash.key;
+out_err:
+        vmw_resource_unreference(&res);
+out_unlock:
+        ttm_read_unlock(&vmaster->lock);
+        return ret;
+
+}