[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / gpu / drm / vmwgfx / vmwgfx_context.c

/**************************************************************************
 *
 * 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;

}
Commit	Line	Data
543831cf TH	1	/**************************************************************************
	2	*
	3	* Copyright © 2009-2012 VMware, Inc., Palo Alto, CA., USA
	4	* All Rights Reserved.
	5	*
	6	* Permission is hereby granted, free of charge, to any person obtaining a
	7	* copy of this software and associated documentation files (the
	8	* "Software"), to deal in the Software without restriction, including
	9	* without limitation the rights to use, copy, modify, merge, publish,
	10	* distribute, sub license, and/or sell copies of the Software, and to
	11	* permit persons to whom the Software is furnished to do so, subject to
	12	* the following conditions:
	13	*
	14	* The above copyright notice and this permission notice (including the
	15	* next paragraph) shall be included in all copies or substantial portions
	16	* of the Software.
	17	*
	18	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	19	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	20	* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
	21	* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
	22	* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
	23	* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
	24	* USE OR OTHER DEALINGS IN THE SOFTWARE.
	25	*
	26	**************************************************************************/
	27
	28	#include "vmwgfx_drv.h"
	29	#include "vmwgfx_resource_priv.h"
	30	#include "ttm/ttm_placement.h"
	31
	32	struct vmw_user_context {
	33	struct ttm_base_object base;
	34	struct vmw_resource res;
	35	};
	36
	37	static void vmw_user_context_free(struct vmw_resource *res);
	38	static struct vmw_resource *
	39	vmw_user_context_base_to_res(struct ttm_base_object *base);
	40
	41	static uint64_t vmw_user_context_size;
	42
	43	static const struct vmw_user_resource_conv user_context_conv = {
	44	.object_type = VMW_RES_CONTEXT,
	45	.base_obj_to_res = vmw_user_context_base_to_res,
	46	.res_free = vmw_user_context_free
	47	};
	48
	49	const struct vmw_user_resource_conv *user_context_converter =
	50	&user_context_conv;
	51
	52
	53	static const struct vmw_res_func vmw_legacy_context_func = {
	54	.res_type = vmw_res_context,
	55	.needs_backup = false,
	56	.may_evict = false,
	57	.type_name = "legacy contexts",
	58	.backup_placement = NULL,
	59	.create = NULL,
	60	.destroy = NULL,
	61	.bind = NULL,
	62	.unbind = NULL
	63	};
	64
65	/**
66	* Context management:
67	*/
68
69	static void vmw_hw_context_destroy(struct vmw_resource *res)
70	{
71
72	struct vmw_private *dev_priv = res->dev_priv;
73	struct {
74	SVGA3dCmdHeader header;
75	SVGA3dCmdDestroyContext body;
76	} *cmd;
77
78
79	vmw_execbuf_release_pinned_bo(dev_priv);
80	cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
81	if (unlikely(cmd == NULL)) {
82	DRM_ERROR("Failed reserving FIFO space for surface "
83	"destruction.\n");
84	return;
85	}
86
87	cmd->header.id = cpu_to_le32(SVGA_3D_CMD_CONTEXT_DESTROY);
88	cmd->header.size = cpu_to_le32(sizeof(cmd->body));
89	cmd->body.cid = cpu_to_le32(res->id);
90
91	vmw_fifo_commit(dev_priv, sizeof(*cmd));
92	vmw_3d_resource_dec(dev_priv, false);
93	}
94
95	static int vmw_context_init(struct vmw_private *dev_priv,
96	struct vmw_resource *res,
97	void (res_free) (struct vmw_resource res))
98	{
99	int ret;
100
101	struct {
102	SVGA3dCmdHeader header;
103	SVGA3dCmdDefineContext body;
104	} *cmd;
105
106	ret = vmw_resource_init(dev_priv, res, false,
107	res_free, &vmw_legacy_context_func);
108
109	if (unlikely(ret != 0)) {
110	DRM_ERROR("Failed to allocate a resource id.\n");
111	goto out_early;
112	}
113
114	if (unlikely(res->id >= SVGA3D_MAX_CONTEXT_IDS)) {
115	DRM_ERROR("Out of hw context ids.\n");
116	vmw_resource_unreference(&res);
117	return -ENOMEM;
118	}
119
120	cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
121	if (unlikely(cmd == NULL)) {
122	DRM_ERROR("Fifo reserve failed.\n");
123	vmw_resource_unreference(&res);
124	return -ENOMEM;
125	}
126
127	cmd->header.id = cpu_to_le32(SVGA_3D_CMD_CONTEXT_DEFINE);
128	cmd->header.size = cpu_to_le32(sizeof(cmd->body));
129	cmd->body.cid = cpu_to_le32(res->id);
130
131	vmw_fifo_commit(dev_priv, sizeof(*cmd));
132	(void) vmw_3d_resource_inc(dev_priv, false);
133	vmw_resource_activate(res, vmw_hw_context_destroy);
134	return 0;
135
136	out_early:
137	if (res_free == NULL)
138	kfree(res);
139	else
140	res_free(res);
141	return ret;
142	}
143
144	struct vmw_resource vmw_context_alloc(struct vmw_private dev_priv)
145	{
146	struct vmw_resource res = kmalloc(sizeof(res), GFP_KERNEL);
147	int ret;
148
149	if (unlikely(res == NULL))
150	return NULL;
151
152	ret = vmw_context_init(dev_priv, res, NULL);
153
154	return (ret == 0) ? res : NULL;
155	}
156
157	/**
158	* User-space context management:
159	*/
160
161	static struct vmw_resource *
162	vmw_user_context_base_to_res(struct ttm_base_object *base)
163	{
164	return &(container_of(base, struct vmw_user_context, base)->res);
165	}
166
167	static void vmw_user_context_free(struct vmw_resource *res)
168	{
169	struct vmw_user_context *ctx =
170	container_of(res, struct vmw_user_context, res);
171	struct vmw_private *dev_priv = res->dev_priv;
172
173	ttm_base_object_kfree(ctx, base);
174	ttm_mem_global_free(vmw_mem_glob(dev_priv),
175	vmw_user_context_size);
176	}
177
178	/**
179	* This function is called when user space has no more references on the
180	* base object. It releases the base-object's reference on the resource object.
181	*/
182
183	static void vmw_user_context_base_release(struct ttm_base_object **p_base)
184	{
185	struct ttm_base_object base = p_base;
186	struct vmw_user_context *ctx =
187	container_of(base, struct vmw_user_context, base);
188	struct vmw_resource *res = &ctx->res;
189
190	*p_base = NULL;
191	vmw_resource_unreference(&res);
192	}
193
194	int vmw_context_destroy_ioctl(struct drm_device dev, void data,
195	struct drm_file *file_priv)
196	{
197	struct drm_vmw_context_arg arg = (struct drm_vmw_context_arg )data;
198	struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
199
200	return ttm_ref_object_base_unref(tfile, arg->cid, TTM_REF_USAGE);
201	}
202
203	int vmw_context_define_ioctl(struct drm_device dev, void data,
204	struct drm_file *file_priv)
205	{
206	struct vmw_private *dev_priv = vmw_priv(dev);
207	struct vmw_user_context *ctx;
208	struct vmw_resource *res;
209	struct vmw_resource *tmp;
210	struct drm_vmw_context_arg arg = (struct drm_vmw_context_arg )data;
211	struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
212	struct vmw_master *vmaster = vmw_master(file_priv->master);
213	int ret;
214
215
216	/*
217	* Approximate idr memory usage with 128 bytes. It will be limited
218	* by maximum number_of contexts anyway.
219	*/
220
221	if (unlikely(vmw_user_context_size == 0))
222	vmw_user_context_size = ttm_round_pot(sizeof(*ctx)) + 128;
223
224	ret = ttm_read_lock(&vmaster->lock, true);
225	if (unlikely(ret != 0))
226	return ret;
227
228	ret = ttm_mem_global_alloc(vmw_mem_glob(dev_priv),
229	vmw_user_context_size,
230	false, true);
231	if (unlikely(ret != 0)) {
232	if (ret != -ERESTARTSYS)
233	DRM_ERROR("Out of graphics memory for context"
234	" creation.\n");
235	goto out_unlock;
236	}
237
238	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
239	if (unlikely(ctx == NULL)) {
240	ttm_mem_global_free(vmw_mem_glob(dev_priv),
241	vmw_user_context_size);
242	ret = -ENOMEM;
243	goto out_unlock;
244	}
245
246	res = &ctx->res;
247	ctx->base.shareable = false;
248	ctx->base.tfile = NULL;
249
250	/*
251	* From here on, the destructor takes over resource freeing.
252	*/
253
254	ret = vmw_context_init(dev_priv, res, vmw_user_context_free);
255	if (unlikely(ret != 0))
256	goto out_unlock;
257
258	tmp = vmw_resource_reference(&ctx->res);
259	ret = ttm_base_object_init(tfile, &ctx->base, false, VMW_RES_CONTEXT,
260	&vmw_user_context_base_release, NULL);
261
262	if (unlikely(ret != 0)) {
263	vmw_resource_unreference(&tmp);
264	goto out_err;
265	}
266
267	arg->cid = ctx->base.hash.key;
268	out_err:
269	vmw_resource_unreference(&res);
270	out_unlock:
271	ttm_read_unlock(&vmaster->lock);
272	return ret;
273
274	}