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v4.6
 
   1/*
   2 * Copyright (C) 2012 Samsung Electronics Co.Ltd
   3 * Authors: Joonyoung Shim <jy0922.shim@samsung.com>
   4 *
   5 * This program is free software; you can redistribute it and/or modify
   6 * it under the terms of the GNU General Public License version 2 as
   7 * published by the Free Software Foundationr
   8 */
   9
  10#include <linux/kernel.h>
  11#include <linux/clk.h>
 
 
 
  12#include <linux/err.h>
  13#include <linux/interrupt.h>
  14#include <linux/io.h>
 
 
  15#include <linux/platform_device.h>
  16#include <linux/pm_runtime.h>
  17#include <linux/slab.h>
 
  18#include <linux/workqueue.h>
  19#include <linux/dma-mapping.h>
  20#include <linux/dma-attrs.h>
  21#include <linux/of.h>
  22
  23#include <drm/drmP.h>
  24#include <drm/exynos_drm.h>
 
  25#include "exynos_drm_drv.h"
  26#include "exynos_drm_g2d.h"
  27#include "exynos_drm_gem.h"
  28#include "exynos_drm_iommu.h"
  29
  30#define G2D_HW_MAJOR_VER		4
  31#define G2D_HW_MINOR_VER		1
  32
  33/* vaild register range set from user: 0x0104 ~ 0x0880 */
  34#define G2D_VALID_START			0x0104
  35#define G2D_VALID_END			0x0880
  36
  37/* general registers */
  38#define G2D_SOFT_RESET			0x0000
  39#define G2D_INTEN			0x0004
  40#define G2D_INTC_PEND			0x000C
  41#define G2D_DMA_SFR_BASE_ADDR		0x0080
  42#define G2D_DMA_COMMAND			0x0084
  43#define G2D_DMA_STATUS			0x008C
  44#define G2D_DMA_HOLD_CMD		0x0090
  45
  46/* command registers */
  47#define G2D_BITBLT_START		0x0100
  48
  49/* registers for base address */
  50#define G2D_SRC_BASE_ADDR		0x0304
  51#define G2D_SRC_STRIDE_REG		0x0308
  52#define G2D_SRC_COLOR_MODE		0x030C
  53#define G2D_SRC_LEFT_TOP		0x0310
  54#define G2D_SRC_RIGHT_BOTTOM		0x0314
  55#define G2D_SRC_PLANE2_BASE_ADDR	0x0318
  56#define G2D_DST_BASE_ADDR		0x0404
  57#define G2D_DST_STRIDE_REG		0x0408
  58#define G2D_DST_COLOR_MODE		0x040C
  59#define G2D_DST_LEFT_TOP		0x0410
  60#define G2D_DST_RIGHT_BOTTOM		0x0414
  61#define G2D_DST_PLANE2_BASE_ADDR	0x0418
  62#define G2D_PAT_BASE_ADDR		0x0500
  63#define G2D_MSK_BASE_ADDR		0x0520
  64
  65/* G2D_SOFT_RESET */
  66#define G2D_SFRCLEAR			(1 << 1)
  67#define G2D_R				(1 << 0)
  68
  69/* G2D_INTEN */
  70#define G2D_INTEN_ACF			(1 << 3)
  71#define G2D_INTEN_UCF			(1 << 2)
  72#define G2D_INTEN_GCF			(1 << 1)
  73#define G2D_INTEN_SCF			(1 << 0)
  74
  75/* G2D_INTC_PEND */
  76#define G2D_INTP_ACMD_FIN		(1 << 3)
  77#define G2D_INTP_UCMD_FIN		(1 << 2)
  78#define G2D_INTP_GCMD_FIN		(1 << 1)
  79#define G2D_INTP_SCMD_FIN		(1 << 0)
  80
  81/* G2D_DMA_COMMAND */
  82#define G2D_DMA_HALT			(1 << 2)
  83#define G2D_DMA_CONTINUE		(1 << 1)
  84#define G2D_DMA_START			(1 << 0)
  85
  86/* G2D_DMA_STATUS */
  87#define G2D_DMA_LIST_DONE_COUNT		(0xFF << 17)
  88#define G2D_DMA_BITBLT_DONE_COUNT	(0xFFFF << 1)
  89#define G2D_DMA_DONE			(1 << 0)
  90#define G2D_DMA_LIST_DONE_COUNT_OFFSET	17
  91
  92/* G2D_DMA_HOLD_CMD */
  93#define G2D_USER_HOLD			(1 << 2)
  94#define G2D_LIST_HOLD			(1 << 1)
  95#define G2D_BITBLT_HOLD			(1 << 0)
  96
  97/* G2D_BITBLT_START */
  98#define G2D_START_CASESEL		(1 << 2)
  99#define G2D_START_NHOLT			(1 << 1)
 100#define G2D_START_BITBLT		(1 << 0)
 101
 102/* buffer color format */
 103#define G2D_FMT_XRGB8888		0
 104#define G2D_FMT_ARGB8888		1
 105#define G2D_FMT_RGB565			2
 106#define G2D_FMT_XRGB1555		3
 107#define G2D_FMT_ARGB1555		4
 108#define G2D_FMT_XRGB4444		5
 109#define G2D_FMT_ARGB4444		6
 110#define G2D_FMT_PACKED_RGB888		7
 111#define G2D_FMT_A8			11
 112#define G2D_FMT_L8			12
 113
 114/* buffer valid length */
 115#define G2D_LEN_MIN			1
 116#define G2D_LEN_MAX			8000
 117
 118#define G2D_CMDLIST_SIZE		(PAGE_SIZE / 4)
 119#define G2D_CMDLIST_NUM			64
 120#define G2D_CMDLIST_POOL_SIZE		(G2D_CMDLIST_SIZE * G2D_CMDLIST_NUM)
 121#define G2D_CMDLIST_DATA_NUM		(G2D_CMDLIST_SIZE / sizeof(u32) - 2)
 122
 123/* maximum buffer pool size of userptr is 64MB as default */
 124#define MAX_POOL		(64 * 1024 * 1024)
 125
 126enum {
 127	BUF_TYPE_GEM = 1,
 128	BUF_TYPE_USERPTR,
 129};
 130
 131enum g2d_reg_type {
 132	REG_TYPE_NONE = -1,
 133	REG_TYPE_SRC,
 134	REG_TYPE_SRC_PLANE2,
 135	REG_TYPE_DST,
 136	REG_TYPE_DST_PLANE2,
 137	REG_TYPE_PAT,
 138	REG_TYPE_MSK,
 139	MAX_REG_TYPE_NR
 140};
 141
 
 
 
 
 
 
 
 
 
 
 
 
 142/* cmdlist data structure */
 143struct g2d_cmdlist {
 144	u32		head;
 145	unsigned long	data[G2D_CMDLIST_DATA_NUM];
 146	u32		last;	/* last data offset */
 147};
 148
 149/*
 150 * A structure of buffer description
 151 *
 152 * @format: color format
 153 * @stride: buffer stride/pitch in bytes
 154 * @left_x: the x coordinates of left top corner
 155 * @top_y: the y coordinates of left top corner
 156 * @right_x: the x coordinates of right bottom corner
 157 * @bottom_y: the y coordinates of right bottom corner
 158 *
 159 */
 160struct g2d_buf_desc {
 161	unsigned int	format;
 162	unsigned int	stride;
 163	unsigned int	left_x;
 164	unsigned int	top_y;
 165	unsigned int	right_x;
 166	unsigned int	bottom_y;
 167};
 168
 169/*
 170 * A structure of buffer information
 171 *
 172 * @map_nr: manages the number of mapped buffers
 173 * @reg_types: stores regitster type in the order of requested command
 174 * @handles: stores buffer handle in its reg_type position
 175 * @types: stores buffer type in its reg_type position
 176 * @descs: stores buffer description in its reg_type position
 177 *
 178 */
 179struct g2d_buf_info {
 180	unsigned int		map_nr;
 181	enum g2d_reg_type	reg_types[MAX_REG_TYPE_NR];
 182	unsigned long		handles[MAX_REG_TYPE_NR];
 183	unsigned int		types[MAX_REG_TYPE_NR];
 184	struct g2d_buf_desc	descs[MAX_REG_TYPE_NR];
 185};
 186
 187struct drm_exynos_pending_g2d_event {
 188	struct drm_pending_event	base;
 189	struct drm_exynos_g2d_event	event;
 190};
 191
 192struct g2d_cmdlist_userptr {
 193	struct list_head	list;
 194	dma_addr_t		dma_addr;
 195	unsigned long		userptr;
 196	unsigned long		size;
 197	struct frame_vector	*vec;
 
 198	struct sg_table		*sgt;
 199	atomic_t		refcount;
 200	bool			in_pool;
 201	bool			out_of_list;
 202};
 203struct g2d_cmdlist_node {
 204	struct list_head	list;
 205	struct g2d_cmdlist	*cmdlist;
 206	dma_addr_t		dma_addr;
 207	struct g2d_buf_info	buf_info;
 208
 209	struct drm_exynos_pending_g2d_event	*event;
 210};
 211
 212struct g2d_runqueue_node {
 213	struct list_head	list;
 214	struct list_head	run_cmdlist;
 215	struct list_head	event_list;
 216	struct drm_file		*filp;
 217	pid_t			pid;
 218	struct completion	complete;
 219	int			async;
 220};
 221
 222struct g2d_data {
 223	struct device			*dev;
 
 224	struct clk			*gate_clk;
 225	void __iomem			*regs;
 226	int				irq;
 227	struct workqueue_struct		*g2d_workq;
 228	struct work_struct		runqueue_work;
 229	struct exynos_drm_subdrv	subdrv;
 230	bool				suspended;
 231
 232	/* cmdlist */
 233	struct g2d_cmdlist_node		*cmdlist_node;
 234	struct list_head		free_cmdlist;
 235	struct mutex			cmdlist_mutex;
 236	dma_addr_t			cmdlist_pool;
 237	void				*cmdlist_pool_virt;
 238	struct dma_attrs		cmdlist_dma_attrs;
 239
 240	/* runqueue*/
 241	struct g2d_runqueue_node	*runqueue_node;
 242	struct list_head		runqueue;
 243	struct mutex			runqueue_mutex;
 244	struct kmem_cache		*runqueue_slab;
 245
 246	unsigned long			current_pool;
 247	unsigned long			max_pool;
 248};
 249
 
 
 
 
 
 
 250static int g2d_init_cmdlist(struct g2d_data *g2d)
 251{
 252	struct device *dev = g2d->dev;
 253	struct g2d_cmdlist_node *node = g2d->cmdlist_node;
 254	struct exynos_drm_subdrv *subdrv = &g2d->subdrv;
 255	int nr;
 256	int ret;
 257	struct g2d_buf_info *buf_info;
 258
 259	init_dma_attrs(&g2d->cmdlist_dma_attrs);
 260	dma_set_attr(DMA_ATTR_WRITE_COMBINE, &g2d->cmdlist_dma_attrs);
 261
 262	g2d->cmdlist_pool_virt = dma_alloc_attrs(to_dma_dev(subdrv->drm_dev),
 263						G2D_CMDLIST_POOL_SIZE,
 264						&g2d->cmdlist_pool, GFP_KERNEL,
 265						&g2d->cmdlist_dma_attrs);
 266	if (!g2d->cmdlist_pool_virt) {
 267		dev_err(dev, "failed to allocate dma memory\n");
 268		return -ENOMEM;
 269	}
 270
 271	node = kcalloc(G2D_CMDLIST_NUM, sizeof(*node), GFP_KERNEL);
 272	if (!node) {
 273		dev_err(dev, "failed to allocate memory\n");
 274		ret = -ENOMEM;
 275		goto err;
 276	}
 277
 278	for (nr = 0; nr < G2D_CMDLIST_NUM; nr++) {
 279		unsigned int i;
 280
 281		node[nr].cmdlist =
 282			g2d->cmdlist_pool_virt + nr * G2D_CMDLIST_SIZE;
 283		node[nr].dma_addr =
 284			g2d->cmdlist_pool + nr * G2D_CMDLIST_SIZE;
 285
 286		buf_info = &node[nr].buf_info;
 287		for (i = 0; i < MAX_REG_TYPE_NR; i++)
 288			buf_info->reg_types[i] = REG_TYPE_NONE;
 289
 290		list_add_tail(&node[nr].list, &g2d->free_cmdlist);
 291	}
 292
 293	return 0;
 294
 295err:
 296	dma_free_attrs(to_dma_dev(subdrv->drm_dev), G2D_CMDLIST_POOL_SIZE,
 297			g2d->cmdlist_pool_virt,
 298			g2d->cmdlist_pool, &g2d->cmdlist_dma_attrs);
 299	return ret;
 300}
 301
 302static void g2d_fini_cmdlist(struct g2d_data *g2d)
 303{
 304	struct exynos_drm_subdrv *subdrv = &g2d->subdrv;
 305
 306	kfree(g2d->cmdlist_node);
 307
 308	if (g2d->cmdlist_pool_virt && g2d->cmdlist_pool) {
 309		dma_free_attrs(to_dma_dev(subdrv->drm_dev),
 310				G2D_CMDLIST_POOL_SIZE,
 311				g2d->cmdlist_pool_virt,
 312				g2d->cmdlist_pool, &g2d->cmdlist_dma_attrs);
 313	}
 314}
 315
 316static struct g2d_cmdlist_node *g2d_get_cmdlist(struct g2d_data *g2d)
 317{
 318	struct device *dev = g2d->dev;
 319	struct g2d_cmdlist_node *node;
 320
 321	mutex_lock(&g2d->cmdlist_mutex);
 322	if (list_empty(&g2d->free_cmdlist)) {
 323		dev_err(dev, "there is no free cmdlist\n");
 324		mutex_unlock(&g2d->cmdlist_mutex);
 325		return NULL;
 326	}
 327
 328	node = list_first_entry(&g2d->free_cmdlist, struct g2d_cmdlist_node,
 329				list);
 330	list_del_init(&node->list);
 331	mutex_unlock(&g2d->cmdlist_mutex);
 332
 333	return node;
 334}
 335
 336static void g2d_put_cmdlist(struct g2d_data *g2d, struct g2d_cmdlist_node *node)
 337{
 338	mutex_lock(&g2d->cmdlist_mutex);
 339	list_move_tail(&node->list, &g2d->free_cmdlist);
 340	mutex_unlock(&g2d->cmdlist_mutex);
 341}
 342
 343static void g2d_add_cmdlist_to_inuse(struct exynos_drm_g2d_private *g2d_priv,
 344				     struct g2d_cmdlist_node *node)
 345{
 346	struct g2d_cmdlist_node *lnode;
 347
 348	if (list_empty(&g2d_priv->inuse_cmdlist))
 349		goto add_to_list;
 350
 351	/* this links to base address of new cmdlist */
 352	lnode = list_entry(g2d_priv->inuse_cmdlist.prev,
 353				struct g2d_cmdlist_node, list);
 354	lnode->cmdlist->data[lnode->cmdlist->last] = node->dma_addr;
 355
 356add_to_list:
 357	list_add_tail(&node->list, &g2d_priv->inuse_cmdlist);
 358
 359	if (node->event)
 360		list_add_tail(&node->event->base.link, &g2d_priv->event_list);
 361}
 362
 363static void g2d_userptr_put_dma_addr(struct drm_device *drm_dev,
 364					unsigned long obj,
 365					bool force)
 366{
 367	struct g2d_cmdlist_userptr *g2d_userptr =
 368					(struct g2d_cmdlist_userptr *)obj;
 369	struct page **pages;
 370
 371	if (!obj)
 372		return;
 373
 374	if (force)
 375		goto out;
 376
 377	atomic_dec(&g2d_userptr->refcount);
 378
 379	if (atomic_read(&g2d_userptr->refcount) > 0)
 380		return;
 381
 382	if (g2d_userptr->in_pool)
 383		return;
 384
 385out:
 386	exynos_gem_unmap_sgt_from_dma(drm_dev, g2d_userptr->sgt,
 387					DMA_BIDIRECTIONAL);
 388
 389	pages = frame_vector_pages(g2d_userptr->vec);
 390	if (!IS_ERR(pages)) {
 391		int i;
 392
 393		for (i = 0; i < frame_vector_count(g2d_userptr->vec); i++)
 394			set_page_dirty_lock(pages[i]);
 395	}
 396	put_vaddr_frames(g2d_userptr->vec);
 397	frame_vector_destroy(g2d_userptr->vec);
 398
 399	if (!g2d_userptr->out_of_list)
 400		list_del_init(&g2d_userptr->list);
 401
 402	sg_free_table(g2d_userptr->sgt);
 403	kfree(g2d_userptr->sgt);
 404	kfree(g2d_userptr);
 405}
 406
 407static dma_addr_t *g2d_userptr_get_dma_addr(struct drm_device *drm_dev,
 408					unsigned long userptr,
 409					unsigned long size,
 410					struct drm_file *filp,
 411					unsigned long *obj)
 412{
 413	struct drm_exynos_file_private *file_priv = filp->driver_priv;
 414	struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
 415	struct g2d_cmdlist_userptr *g2d_userptr;
 416	struct g2d_data *g2d;
 417	struct sg_table	*sgt;
 418	unsigned long start, end;
 419	unsigned int npages, offset;
 420	int ret;
 421
 422	if (!size) {
 423		DRM_ERROR("invalid userptr size.\n");
 424		return ERR_PTR(-EINVAL);
 425	}
 426
 427	g2d = dev_get_drvdata(g2d_priv->dev);
 428
 429	/* check if userptr already exists in userptr_list. */
 430	list_for_each_entry(g2d_userptr, &g2d_priv->userptr_list, list) {
 431		if (g2d_userptr->userptr == userptr) {
 432			/*
 433			 * also check size because there could be same address
 434			 * and different size.
 435			 */
 436			if (g2d_userptr->size == size) {
 437				atomic_inc(&g2d_userptr->refcount);
 438				*obj = (unsigned long)g2d_userptr;
 439
 440				return &g2d_userptr->dma_addr;
 441			}
 442
 443			/*
 444			 * at this moment, maybe g2d dma is accessing this
 445			 * g2d_userptr memory region so just remove this
 446			 * g2d_userptr object from userptr_list not to be
 447			 * referred again and also except it the userptr
 448			 * pool to be released after the dma access completion.
 449			 */
 450			g2d_userptr->out_of_list = true;
 451			g2d_userptr->in_pool = false;
 452			list_del_init(&g2d_userptr->list);
 453
 454			break;
 455		}
 456	}
 457
 458	g2d_userptr = kzalloc(sizeof(*g2d_userptr), GFP_KERNEL);
 459	if (!g2d_userptr)
 460		return ERR_PTR(-ENOMEM);
 461
 462	atomic_set(&g2d_userptr->refcount, 1);
 463	g2d_userptr->size = size;
 464
 465	start = userptr & PAGE_MASK;
 466	offset = userptr & ~PAGE_MASK;
 467	end = PAGE_ALIGN(userptr + size);
 468	npages = (end - start) >> PAGE_SHIFT;
 469	g2d_userptr->vec = frame_vector_create(npages);
 470	if (!g2d_userptr->vec) {
 
 471		ret = -ENOMEM;
 472		goto err_free;
 473	}
 474
 475	ret = get_vaddr_frames(start, npages, true, true, g2d_userptr->vec);
 
 
 476	if (ret != npages) {
 477		DRM_ERROR("failed to get user pages from userptr.\n");
 
 478		if (ret < 0)
 479			goto err_destroy_framevec;
 
 480		ret = -EFAULT;
 481		goto err_put_framevec;
 482	}
 483	if (frame_vector_to_pages(g2d_userptr->vec) < 0) {
 484		ret = -EFAULT;
 485		goto err_put_framevec;
 486	}
 
 487
 488	sgt = kzalloc(sizeof(*sgt), GFP_KERNEL);
 489	if (!sgt) {
 490		ret = -ENOMEM;
 491		goto err_put_framevec;
 492	}
 493
 494	ret = sg_alloc_table_from_pages(sgt,
 495					frame_vector_pages(g2d_userptr->vec),
 496					npages, offset, size, GFP_KERNEL);
 497	if (ret < 0) {
 498		DRM_ERROR("failed to get sgt from pages.\n");
 499		goto err_free_sgt;
 500	}
 501
 502	g2d_userptr->sgt = sgt;
 503
 504	ret = exynos_gem_map_sgt_with_dma(drm_dev, g2d_userptr->sgt,
 505						DMA_BIDIRECTIONAL);
 506	if (ret < 0) {
 507		DRM_ERROR("failed to map sgt with dma region.\n");
 508		goto err_sg_free_table;
 509	}
 510
 511	g2d_userptr->dma_addr = sgt->sgl[0].dma_address;
 512	g2d_userptr->userptr = userptr;
 513
 514	list_add_tail(&g2d_userptr->list, &g2d_priv->userptr_list);
 515
 516	if (g2d->current_pool + (npages << PAGE_SHIFT) < g2d->max_pool) {
 517		g2d->current_pool += npages << PAGE_SHIFT;
 518		g2d_userptr->in_pool = true;
 519	}
 520
 521	*obj = (unsigned long)g2d_userptr;
 522
 523	return &g2d_userptr->dma_addr;
 524
 525err_sg_free_table:
 526	sg_free_table(sgt);
 527
 528err_free_sgt:
 529	kfree(sgt);
 530
 531err_put_framevec:
 532	put_vaddr_frames(g2d_userptr->vec);
 533
 534err_destroy_framevec:
 535	frame_vector_destroy(g2d_userptr->vec);
 536
 537err_free:
 538	kfree(g2d_userptr);
 539
 540	return ERR_PTR(ret);
 541}
 542
 543static void g2d_userptr_free_all(struct drm_device *drm_dev,
 544					struct g2d_data *g2d,
 545					struct drm_file *filp)
 546{
 547	struct drm_exynos_file_private *file_priv = filp->driver_priv;
 548	struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
 549	struct g2d_cmdlist_userptr *g2d_userptr, *n;
 550
 551	list_for_each_entry_safe(g2d_userptr, n, &g2d_priv->userptr_list, list)
 552		if (g2d_userptr->in_pool)
 553			g2d_userptr_put_dma_addr(drm_dev,
 554						(unsigned long)g2d_userptr,
 555						true);
 556
 557	g2d->current_pool = 0;
 558}
 559
 560static enum g2d_reg_type g2d_get_reg_type(int reg_offset)
 561{
 562	enum g2d_reg_type reg_type;
 563
 564	switch (reg_offset) {
 565	case G2D_SRC_BASE_ADDR:
 566	case G2D_SRC_STRIDE_REG:
 567	case G2D_SRC_COLOR_MODE:
 568	case G2D_SRC_LEFT_TOP:
 569	case G2D_SRC_RIGHT_BOTTOM:
 570		reg_type = REG_TYPE_SRC;
 571		break;
 572	case G2D_SRC_PLANE2_BASE_ADDR:
 573		reg_type = REG_TYPE_SRC_PLANE2;
 574		break;
 575	case G2D_DST_BASE_ADDR:
 576	case G2D_DST_STRIDE_REG:
 577	case G2D_DST_COLOR_MODE:
 578	case G2D_DST_LEFT_TOP:
 579	case G2D_DST_RIGHT_BOTTOM:
 580		reg_type = REG_TYPE_DST;
 581		break;
 582	case G2D_DST_PLANE2_BASE_ADDR:
 583		reg_type = REG_TYPE_DST_PLANE2;
 584		break;
 585	case G2D_PAT_BASE_ADDR:
 586		reg_type = REG_TYPE_PAT;
 587		break;
 588	case G2D_MSK_BASE_ADDR:
 589		reg_type = REG_TYPE_MSK;
 590		break;
 591	default:
 592		reg_type = REG_TYPE_NONE;
 593		DRM_ERROR("Unknown register offset![%d]\n", reg_offset);
 
 594		break;
 595	}
 596
 597	return reg_type;
 598}
 599
 600static unsigned long g2d_get_buf_bpp(unsigned int format)
 601{
 602	unsigned long bpp;
 603
 604	switch (format) {
 605	case G2D_FMT_XRGB8888:
 606	case G2D_FMT_ARGB8888:
 607		bpp = 4;
 608		break;
 609	case G2D_FMT_RGB565:
 610	case G2D_FMT_XRGB1555:
 611	case G2D_FMT_ARGB1555:
 612	case G2D_FMT_XRGB4444:
 613	case G2D_FMT_ARGB4444:
 614		bpp = 2;
 615		break;
 616	case G2D_FMT_PACKED_RGB888:
 617		bpp = 3;
 618		break;
 619	default:
 620		bpp = 1;
 621		break;
 622	}
 623
 624	return bpp;
 625}
 626
 627static bool g2d_check_buf_desc_is_valid(struct g2d_buf_desc *buf_desc,
 628						enum g2d_reg_type reg_type,
 629						unsigned long size)
 
 630{
 631	int width, height;
 632	unsigned long bpp, last_pos;
 633
 634	/*
 635	 * check source and destination buffers only.
 636	 * so the others are always valid.
 637	 */
 638	if (reg_type != REG_TYPE_SRC && reg_type != REG_TYPE_DST)
 639		return true;
 640
 641	/* This check also makes sure that right_x > left_x. */
 642	width = (int)buf_desc->right_x - (int)buf_desc->left_x;
 643	if (width < G2D_LEN_MIN || width > G2D_LEN_MAX) {
 644		DRM_ERROR("width[%d] is out of range!\n", width);
 645		return false;
 646	}
 647
 648	/* This check also makes sure that bottom_y > top_y. */
 649	height = (int)buf_desc->bottom_y - (int)buf_desc->top_y;
 650	if (height < G2D_LEN_MIN || height > G2D_LEN_MAX) {
 651		DRM_ERROR("height[%d] is out of range!\n", height);
 
 652		return false;
 653	}
 654
 655	bpp = g2d_get_buf_bpp(buf_desc->format);
 656
 657	/* Compute the position of the last byte that the engine accesses. */
 658	last_pos = ((unsigned long)buf_desc->bottom_y - 1) *
 659		(unsigned long)buf_desc->stride +
 660		(unsigned long)buf_desc->right_x * bpp - 1;
 661
 662	/*
 663	 * Since right_x > left_x and bottom_y > top_y we already know
 664	 * that the first_pos < last_pos (first_pos being the position
 665	 * of the first byte the engine accesses), it just remains to
 666	 * check if last_pos is smaller then the buffer size.
 667	 */
 668
 669	if (last_pos >= size) {
 670		DRM_ERROR("last engine access position [%lu] "
 671			"is out of range [%lu]!\n", last_pos, size);
 672		return false;
 673	}
 674
 675	return true;
 676}
 677
 678static int g2d_map_cmdlist_gem(struct g2d_data *g2d,
 679				struct g2d_cmdlist_node *node,
 680				struct drm_device *drm_dev,
 681				struct drm_file *file)
 682{
 683	struct g2d_cmdlist *cmdlist = node->cmdlist;
 684	struct g2d_buf_info *buf_info = &node->buf_info;
 685	int offset;
 686	int ret;
 687	int i;
 688
 689	for (i = 0; i < buf_info->map_nr; i++) {
 690		struct g2d_buf_desc *buf_desc;
 691		enum g2d_reg_type reg_type;
 692		int reg_pos;
 693		unsigned long handle;
 694		dma_addr_t *addr;
 695
 696		reg_pos = cmdlist->last - 2 * (i + 1);
 697
 698		offset = cmdlist->data[reg_pos];
 699		handle = cmdlist->data[reg_pos + 1];
 700
 701		reg_type = g2d_get_reg_type(offset);
 702		if (reg_type == REG_TYPE_NONE) {
 703			ret = -EFAULT;
 704			goto err;
 705		}
 706
 707		buf_desc = &buf_info->descs[reg_type];
 708
 709		if (buf_info->types[reg_type] == BUF_TYPE_GEM) {
 710			unsigned long size;
 711
 712			size = exynos_drm_gem_get_size(drm_dev, handle, file);
 713			if (!size) {
 714				ret = -EFAULT;
 715				goto err;
 716			}
 717
 718			if (!g2d_check_buf_desc_is_valid(buf_desc, reg_type,
 719									size)) {
 
 720				ret = -EFAULT;
 721				goto err;
 722			}
 723
 724			addr = exynos_drm_gem_get_dma_addr(drm_dev, handle,
 725								file);
 726			if (IS_ERR(addr)) {
 727				ret = -EFAULT;
 728				goto err;
 729			}
 730		} else {
 731			struct drm_exynos_g2d_userptr g2d_userptr;
 732
 733			if (copy_from_user(&g2d_userptr, (void __user *)handle,
 734				sizeof(struct drm_exynos_g2d_userptr))) {
 735				ret = -EFAULT;
 736				goto err;
 737			}
 738
 739			if (!g2d_check_buf_desc_is_valid(buf_desc, reg_type,
 740							g2d_userptr.size)) {
 
 741				ret = -EFAULT;
 742				goto err;
 743			}
 744
 745			addr = g2d_userptr_get_dma_addr(drm_dev,
 746							g2d_userptr.userptr,
 747							g2d_userptr.size,
 748							file,
 749							&handle);
 750			if (IS_ERR(addr)) {
 751				ret = -EFAULT;
 752				goto err;
 753			}
 754		}
 755
 756		cmdlist->data[reg_pos + 1] = *addr;
 757		buf_info->reg_types[i] = reg_type;
 758		buf_info->handles[reg_type] = handle;
 759	}
 760
 761	return 0;
 762
 763err:
 764	buf_info->map_nr = i;
 765	return ret;
 766}
 767
 768static void g2d_unmap_cmdlist_gem(struct g2d_data *g2d,
 769				  struct g2d_cmdlist_node *node,
 770				  struct drm_file *filp)
 771{
 772	struct exynos_drm_subdrv *subdrv = &g2d->subdrv;
 773	struct g2d_buf_info *buf_info = &node->buf_info;
 774	int i;
 775
 776	for (i = 0; i < buf_info->map_nr; i++) {
 777		struct g2d_buf_desc *buf_desc;
 778		enum g2d_reg_type reg_type;
 779		unsigned long handle;
 780
 781		reg_type = buf_info->reg_types[i];
 782
 783		buf_desc = &buf_info->descs[reg_type];
 784		handle = buf_info->handles[reg_type];
 785
 786		if (buf_info->types[reg_type] == BUF_TYPE_GEM)
 787			exynos_drm_gem_put_dma_addr(subdrv->drm_dev, handle,
 788							filp);
 789		else
 790			g2d_userptr_put_dma_addr(subdrv->drm_dev, handle,
 791							false);
 792
 793		buf_info->reg_types[i] = REG_TYPE_NONE;
 794		buf_info->handles[reg_type] = 0;
 795		buf_info->types[reg_type] = 0;
 796		memset(buf_desc, 0x00, sizeof(*buf_desc));
 797	}
 798
 799	buf_info->map_nr = 0;
 800}
 801
 802static void g2d_dma_start(struct g2d_data *g2d,
 803			  struct g2d_runqueue_node *runqueue_node)
 804{
 805	struct g2d_cmdlist_node *node =
 806				list_first_entry(&runqueue_node->run_cmdlist,
 807						struct g2d_cmdlist_node, list);
 808	int ret;
 809
 810	ret = pm_runtime_get_sync(g2d->dev);
 811	if (ret < 0)
 812		return;
 813
 
 814	writel_relaxed(node->dma_addr, g2d->regs + G2D_DMA_SFR_BASE_ADDR);
 815	writel_relaxed(G2D_DMA_START, g2d->regs + G2D_DMA_COMMAND);
 816}
 817
 818static struct g2d_runqueue_node *g2d_get_runqueue_node(struct g2d_data *g2d)
 819{
 820	struct g2d_runqueue_node *runqueue_node;
 821
 822	if (list_empty(&g2d->runqueue))
 823		return NULL;
 824
 825	runqueue_node = list_first_entry(&g2d->runqueue,
 826					 struct g2d_runqueue_node, list);
 827	list_del_init(&runqueue_node->list);
 828	return runqueue_node;
 829}
 830
 831static void g2d_free_runqueue_node(struct g2d_data *g2d,
 832				   struct g2d_runqueue_node *runqueue_node)
 833{
 834	struct g2d_cmdlist_node *node;
 835
 836	if (!runqueue_node)
 837		return;
 838
 839	mutex_lock(&g2d->cmdlist_mutex);
 840	/*
 841	 * commands in run_cmdlist have been completed so unmap all gem
 842	 * objects in each command node so that they are unreferenced.
 843	 */
 844	list_for_each_entry(node, &runqueue_node->run_cmdlist, list)
 845		g2d_unmap_cmdlist_gem(g2d, node, runqueue_node->filp);
 846	list_splice_tail_init(&runqueue_node->run_cmdlist, &g2d->free_cmdlist);
 847	mutex_unlock(&g2d->cmdlist_mutex);
 848
 849	kmem_cache_free(g2d->runqueue_slab, runqueue_node);
 850}
 851
 852static void g2d_exec_runqueue(struct g2d_data *g2d)
 
 
 
 
 
 
 
 853{
 854	g2d->runqueue_node = g2d_get_runqueue_node(g2d);
 855	if (g2d->runqueue_node)
 856		g2d_dma_start(g2d, g2d->runqueue_node);
 
 
 
 
 
 
 
 
 
 857}
 858
 859static void g2d_runqueue_worker(struct work_struct *work)
 860{
 861	struct g2d_data *g2d = container_of(work, struct g2d_data,
 862					    runqueue_work);
 
 
 
 
 
 
 
 
 863
 864	mutex_lock(&g2d->runqueue_mutex);
 865	pm_runtime_put_sync(g2d->dev);
 866
 867	complete(&g2d->runqueue_node->complete);
 868	if (g2d->runqueue_node->async)
 869		g2d_free_runqueue_node(g2d, g2d->runqueue_node);
 870
 871	if (g2d->suspended)
 872		g2d->runqueue_node = NULL;
 873	else
 874		g2d_exec_runqueue(g2d);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 875	mutex_unlock(&g2d->runqueue_mutex);
 876}
 877
 878static void g2d_finish_event(struct g2d_data *g2d, u32 cmdlist_no)
 879{
 880	struct drm_device *drm_dev = g2d->subdrv.drm_dev;
 881	struct g2d_runqueue_node *runqueue_node = g2d->runqueue_node;
 882	struct drm_exynos_pending_g2d_event *e;
 883	struct timeval now;
 884
 885	if (list_empty(&runqueue_node->event_list))
 886		return;
 887
 888	e = list_first_entry(&runqueue_node->event_list,
 889			     struct drm_exynos_pending_g2d_event, base.link);
 890
 891	do_gettimeofday(&now);
 892	e->event.tv_sec = now.tv_sec;
 893	e->event.tv_usec = now.tv_usec;
 894	e->event.cmdlist_no = cmdlist_no;
 895
 896	drm_send_event(drm_dev, &e->base);
 897}
 898
 899static irqreturn_t g2d_irq_handler(int irq, void *dev_id)
 900{
 901	struct g2d_data *g2d = dev_id;
 902	u32 pending;
 903
 904	pending = readl_relaxed(g2d->regs + G2D_INTC_PEND);
 905	if (pending)
 906		writel_relaxed(pending, g2d->regs + G2D_INTC_PEND);
 907
 908	if (pending & G2D_INTP_GCMD_FIN) {
 909		u32 cmdlist_no = readl_relaxed(g2d->regs + G2D_DMA_STATUS);
 910
 911		cmdlist_no = (cmdlist_no & G2D_DMA_LIST_DONE_COUNT) >>
 912						G2D_DMA_LIST_DONE_COUNT_OFFSET;
 913
 914		g2d_finish_event(g2d, cmdlist_no);
 915
 916		writel_relaxed(0, g2d->regs + G2D_DMA_HOLD_CMD);
 917		if (!(pending & G2D_INTP_ACMD_FIN)) {
 918			writel_relaxed(G2D_DMA_CONTINUE,
 919					g2d->regs + G2D_DMA_COMMAND);
 920		}
 921	}
 922
 923	if (pending & G2D_INTP_ACMD_FIN)
 
 924		queue_work(g2d->g2d_workq, &g2d->runqueue_work);
 
 925
 926	return IRQ_HANDLED;
 927}
 928
 929static int g2d_check_reg_offset(struct device *dev,
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 930				struct g2d_cmdlist_node *node,
 931				int nr, bool for_addr)
 932{
 933	struct g2d_cmdlist *cmdlist = node->cmdlist;
 934	int reg_offset;
 935	int index;
 936	int i;
 937
 938	for (i = 0; i < nr; i++) {
 939		struct g2d_buf_info *buf_info = &node->buf_info;
 940		struct g2d_buf_desc *buf_desc;
 941		enum g2d_reg_type reg_type;
 942		unsigned long value;
 943
 944		index = cmdlist->last - 2 * (i + 1);
 945
 946		reg_offset = cmdlist->data[index] & ~0xfffff000;
 947		if (reg_offset < G2D_VALID_START || reg_offset > G2D_VALID_END)
 948			goto err;
 949		if (reg_offset % 4)
 950			goto err;
 951
 952		switch (reg_offset) {
 953		case G2D_SRC_BASE_ADDR:
 954		case G2D_SRC_PLANE2_BASE_ADDR:
 955		case G2D_DST_BASE_ADDR:
 956		case G2D_DST_PLANE2_BASE_ADDR:
 957		case G2D_PAT_BASE_ADDR:
 958		case G2D_MSK_BASE_ADDR:
 959			if (!for_addr)
 960				goto err;
 961
 962			reg_type = g2d_get_reg_type(reg_offset);
 963
 964			/* check userptr buffer type. */
 965			if ((cmdlist->data[index] & ~0x7fffffff) >> 31) {
 966				buf_info->types[reg_type] = BUF_TYPE_USERPTR;
 967				cmdlist->data[index] &= ~G2D_BUF_USERPTR;
 968			} else
 969				buf_info->types[reg_type] = BUF_TYPE_GEM;
 970			break;
 971		case G2D_SRC_STRIDE_REG:
 972		case G2D_DST_STRIDE_REG:
 973			if (for_addr)
 974				goto err;
 975
 976			reg_type = g2d_get_reg_type(reg_offset);
 977
 978			buf_desc = &buf_info->descs[reg_type];
 979			buf_desc->stride = cmdlist->data[index + 1];
 980			break;
 981		case G2D_SRC_COLOR_MODE:
 982		case G2D_DST_COLOR_MODE:
 983			if (for_addr)
 984				goto err;
 985
 986			reg_type = g2d_get_reg_type(reg_offset);
 987
 988			buf_desc = &buf_info->descs[reg_type];
 989			value = cmdlist->data[index + 1];
 990
 991			buf_desc->format = value & 0xf;
 992			break;
 993		case G2D_SRC_LEFT_TOP:
 994		case G2D_DST_LEFT_TOP:
 995			if (for_addr)
 996				goto err;
 997
 998			reg_type = g2d_get_reg_type(reg_offset);
 999
1000			buf_desc = &buf_info->descs[reg_type];
1001			value = cmdlist->data[index + 1];
1002
1003			buf_desc->left_x = value & 0x1fff;
1004			buf_desc->top_y = (value & 0x1fff0000) >> 16;
1005			break;
1006		case G2D_SRC_RIGHT_BOTTOM:
1007		case G2D_DST_RIGHT_BOTTOM:
1008			if (for_addr)
1009				goto err;
1010
1011			reg_type = g2d_get_reg_type(reg_offset);
1012
1013			buf_desc = &buf_info->descs[reg_type];
1014			value = cmdlist->data[index + 1];
1015
1016			buf_desc->right_x = value & 0x1fff;
1017			buf_desc->bottom_y = (value & 0x1fff0000) >> 16;
1018			break;
1019		default:
1020			if (for_addr)
1021				goto err;
1022			break;
1023		}
1024	}
1025
1026	return 0;
1027
1028err:
1029	dev_err(dev, "Bad register offset: 0x%lx\n", cmdlist->data[index]);
1030	return -EINVAL;
1031}
1032
1033/* ioctl functions */
1034int exynos_g2d_get_ver_ioctl(struct drm_device *drm_dev, void *data,
1035			     struct drm_file *file)
1036{
1037	struct drm_exynos_file_private *file_priv = file->driver_priv;
1038	struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
1039	struct device *dev;
1040	struct g2d_data *g2d;
1041	struct drm_exynos_g2d_get_ver *ver = data;
1042
1043	if (!g2d_priv)
1044		return -ENODEV;
1045
1046	dev = g2d_priv->dev;
1047	if (!dev)
1048		return -ENODEV;
1049
1050	g2d = dev_get_drvdata(dev);
1051	if (!g2d)
1052		return -EFAULT;
1053
1054	ver->major = G2D_HW_MAJOR_VER;
1055	ver->minor = G2D_HW_MINOR_VER;
1056
1057	return 0;
1058}
1059
1060int exynos_g2d_set_cmdlist_ioctl(struct drm_device *drm_dev, void *data,
1061				 struct drm_file *file)
1062{
1063	struct drm_exynos_file_private *file_priv = file->driver_priv;
1064	struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
1065	struct device *dev;
1066	struct g2d_data *g2d;
1067	struct drm_exynos_g2d_set_cmdlist *req = data;
1068	struct drm_exynos_g2d_cmd *cmd;
1069	struct drm_exynos_pending_g2d_event *e;
1070	struct g2d_cmdlist_node *node;
1071	struct g2d_cmdlist *cmdlist;
1072	int size;
1073	int ret;
1074
1075	if (!g2d_priv)
1076		return -ENODEV;
1077
1078	dev = g2d_priv->dev;
1079	if (!dev)
1080		return -ENODEV;
1081
1082	g2d = dev_get_drvdata(dev);
1083	if (!g2d)
1084		return -EFAULT;
1085
1086	node = g2d_get_cmdlist(g2d);
1087	if (!node)
1088		return -ENOMEM;
1089
 
 
 
 
 
 
 
 
 
 
 
1090	node->event = NULL;
1091
1092	if (req->event_type != G2D_EVENT_NOT) {
1093		e = kzalloc(sizeof(*node->event), GFP_KERNEL);
1094		if (!e) {
1095			ret = -ENOMEM;
1096			goto err;
1097		}
1098
1099		e->event.base.type = DRM_EXYNOS_G2D_EVENT;
1100		e->event.base.length = sizeof(e->event);
1101		e->event.user_data = req->user_data;
1102
1103		ret = drm_event_reserve_init(drm_dev, file, &e->base, &e->event.base);
1104		if (ret) {
1105			kfree(e);
1106			goto err;
1107		}
1108
1109		node->event = e;
1110	}
1111
1112	cmdlist = node->cmdlist;
1113
1114	cmdlist->last = 0;
1115
1116	/*
1117	 * If don't clear SFR registers, the cmdlist is affected by register
1118	 * values of previous cmdlist. G2D hw executes SFR clear command and
1119	 * a next command at the same time then the next command is ignored and
1120	 * is executed rightly from next next command, so needs a dummy command
1121	 * to next command of SFR clear command.
1122	 */
1123	cmdlist->data[cmdlist->last++] = G2D_SOFT_RESET;
1124	cmdlist->data[cmdlist->last++] = G2D_SFRCLEAR;
1125	cmdlist->data[cmdlist->last++] = G2D_SRC_BASE_ADDR;
1126	cmdlist->data[cmdlist->last++] = 0;
1127
1128	/*
1129	 * 'LIST_HOLD' command should be set to the DMA_HOLD_CMD_REG
1130	 * and GCF bit should be set to INTEN register if user wants
1131	 * G2D interrupt event once current command list execution is
1132	 * finished.
1133	 * Otherwise only ACF bit should be set to INTEN register so
1134	 * that one interrupt is occurred after all command lists
1135	 * have been completed.
1136	 */
1137	if (node->event) {
1138		cmdlist->data[cmdlist->last++] = G2D_INTEN;
1139		cmdlist->data[cmdlist->last++] = G2D_INTEN_ACF | G2D_INTEN_GCF;
1140		cmdlist->data[cmdlist->last++] = G2D_DMA_HOLD_CMD;
1141		cmdlist->data[cmdlist->last++] = G2D_LIST_HOLD;
1142	} else {
1143		cmdlist->data[cmdlist->last++] = G2D_INTEN;
1144		cmdlist->data[cmdlist->last++] = G2D_INTEN_ACF;
1145	}
1146
1147	/* Check size of cmdlist: last 2 is about G2D_BITBLT_START */
 
 
 
 
1148	size = cmdlist->last + req->cmd_nr * 2 + req->cmd_buf_nr * 2 + 2;
1149	if (size > G2D_CMDLIST_DATA_NUM) {
1150		dev_err(dev, "cmdlist size is too big\n");
1151		ret = -EINVAL;
1152		goto err_free_event;
1153	}
1154
1155	cmd = (struct drm_exynos_g2d_cmd *)(unsigned long)req->cmd;
1156
1157	if (copy_from_user(cmdlist->data + cmdlist->last,
1158				(void __user *)cmd,
1159				sizeof(*cmd) * req->cmd_nr)) {
1160		ret = -EFAULT;
1161		goto err_free_event;
1162	}
1163	cmdlist->last += req->cmd_nr * 2;
1164
1165	ret = g2d_check_reg_offset(dev, node, req->cmd_nr, false);
1166	if (ret < 0)
1167		goto err_free_event;
1168
1169	node->buf_info.map_nr = req->cmd_buf_nr;
1170	if (req->cmd_buf_nr) {
1171		struct drm_exynos_g2d_cmd *cmd_buf;
1172
1173		cmd_buf = (struct drm_exynos_g2d_cmd *)
1174				(unsigned long)req->cmd_buf;
1175
1176		if (copy_from_user(cmdlist->data + cmdlist->last,
1177					(void __user *)cmd_buf,
1178					sizeof(*cmd_buf) * req->cmd_buf_nr)) {
1179			ret = -EFAULT;
1180			goto err_free_event;
1181		}
1182		cmdlist->last += req->cmd_buf_nr * 2;
1183
1184		ret = g2d_check_reg_offset(dev, node, req->cmd_buf_nr, true);
1185		if (ret < 0)
1186			goto err_free_event;
1187
1188		ret = g2d_map_cmdlist_gem(g2d, node, drm_dev, file);
1189		if (ret < 0)
1190			goto err_unmap;
1191	}
1192
1193	cmdlist->data[cmdlist->last++] = G2D_BITBLT_START;
1194	cmdlist->data[cmdlist->last++] = G2D_START_BITBLT;
1195
1196	/* head */
1197	cmdlist->head = cmdlist->last / 2;
1198
1199	/* tail */
1200	cmdlist->data[cmdlist->last] = 0;
1201
1202	g2d_add_cmdlist_to_inuse(g2d_priv, node);
1203
1204	return 0;
1205
1206err_unmap:
1207	g2d_unmap_cmdlist_gem(g2d, node, file);
1208err_free_event:
1209	if (node->event)
1210		drm_event_cancel_free(drm_dev, &node->event->base);
1211err:
1212	g2d_put_cmdlist(g2d, node);
1213	return ret;
1214}
1215
1216int exynos_g2d_exec_ioctl(struct drm_device *drm_dev, void *data,
1217			  struct drm_file *file)
1218{
1219	struct drm_exynos_file_private *file_priv = file->driver_priv;
1220	struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
1221	struct device *dev;
1222	struct g2d_data *g2d;
1223	struct drm_exynos_g2d_exec *req = data;
1224	struct g2d_runqueue_node *runqueue_node;
1225	struct list_head *run_cmdlist;
1226	struct list_head *event_list;
1227
1228	if (!g2d_priv)
1229		return -ENODEV;
1230
1231	dev = g2d_priv->dev;
1232	if (!dev)
1233		return -ENODEV;
1234
1235	g2d = dev_get_drvdata(dev);
1236	if (!g2d)
1237		return -EFAULT;
1238
1239	runqueue_node = kmem_cache_alloc(g2d->runqueue_slab, GFP_KERNEL);
1240	if (!runqueue_node) {
1241		dev_err(dev, "failed to allocate memory\n");
1242		return -ENOMEM;
1243	}
1244	run_cmdlist = &runqueue_node->run_cmdlist;
1245	event_list = &runqueue_node->event_list;
1246	INIT_LIST_HEAD(run_cmdlist);
1247	INIT_LIST_HEAD(event_list);
1248	init_completion(&runqueue_node->complete);
1249	runqueue_node->async = req->async;
1250
1251	list_splice_init(&g2d_priv->inuse_cmdlist, run_cmdlist);
1252	list_splice_init(&g2d_priv->event_list, event_list);
1253
1254	if (list_empty(run_cmdlist)) {
1255		dev_err(dev, "there is no inuse cmdlist\n");
1256		kmem_cache_free(g2d->runqueue_slab, runqueue_node);
1257		return -EPERM;
1258	}
1259
1260	mutex_lock(&g2d->runqueue_mutex);
1261	runqueue_node->pid = current->pid;
1262	runqueue_node->filp = file;
1263	list_add_tail(&runqueue_node->list, &g2d->runqueue);
1264	if (!g2d->runqueue_node)
1265		g2d_exec_runqueue(g2d);
1266	mutex_unlock(&g2d->runqueue_mutex);
1267
 
 
 
1268	if (runqueue_node->async)
1269		goto out;
1270
1271	wait_for_completion(&runqueue_node->complete);
1272	g2d_free_runqueue_node(g2d, runqueue_node);
1273
1274out:
1275	return 0;
1276}
1277
1278static int g2d_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
1279{
1280	struct g2d_data *g2d;
1281	int ret;
1282
1283	g2d = dev_get_drvdata(dev);
1284	if (!g2d)
1285		return -EFAULT;
1286
1287	/* allocate dma-aware cmdlist buffer. */
1288	ret = g2d_init_cmdlist(g2d);
1289	if (ret < 0) {
1290		dev_err(dev, "cmdlist init failed\n");
1291		return ret;
1292	}
1293
1294	ret = drm_iommu_attach_device(drm_dev, dev);
1295	if (ret < 0) {
1296		dev_err(dev, "failed to enable iommu.\n");
1297		g2d_fini_cmdlist(g2d);
1298	}
1299
1300	return ret;
1301
1302}
1303
1304static void g2d_subdrv_remove(struct drm_device *drm_dev, struct device *dev)
1305{
1306	drm_iommu_detach_device(drm_dev, dev);
1307}
1308
1309static int g2d_open(struct drm_device *drm_dev, struct device *dev,
1310			struct drm_file *file)
1311{
1312	struct drm_exynos_file_private *file_priv = file->driver_priv;
1313	struct exynos_drm_g2d_private *g2d_priv;
1314
1315	g2d_priv = kzalloc(sizeof(*g2d_priv), GFP_KERNEL);
1316	if (!g2d_priv)
1317		return -ENOMEM;
1318
1319	g2d_priv->dev = dev;
1320	file_priv->g2d_priv = g2d_priv;
1321
1322	INIT_LIST_HEAD(&g2d_priv->inuse_cmdlist);
1323	INIT_LIST_HEAD(&g2d_priv->event_list);
1324	INIT_LIST_HEAD(&g2d_priv->userptr_list);
1325
1326	return 0;
1327}
1328
1329static void g2d_close(struct drm_device *drm_dev, struct device *dev,
1330			struct drm_file *file)
1331{
1332	struct drm_exynos_file_private *file_priv = file->driver_priv;
1333	struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
1334	struct g2d_data *g2d;
1335	struct g2d_cmdlist_node *node, *n;
1336
1337	if (!dev)
1338		return;
1339
1340	g2d = dev_get_drvdata(dev);
1341	if (!g2d)
1342		return;
1343
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1344	mutex_lock(&g2d->cmdlist_mutex);
1345	list_for_each_entry_safe(node, n, &g2d_priv->inuse_cmdlist, list) {
1346		/*
1347		 * unmap all gem objects not completed.
1348		 *
1349		 * P.S. if current process was terminated forcely then
1350		 * there may be some commands in inuse_cmdlist so unmap
1351		 * them.
1352		 */
1353		g2d_unmap_cmdlist_gem(g2d, node, file);
1354		list_move_tail(&node->list, &g2d->free_cmdlist);
1355	}
1356	mutex_unlock(&g2d->cmdlist_mutex);
1357
1358	/* release all g2d_userptr in pool. */
1359	g2d_userptr_free_all(drm_dev, g2d, file);
 
 
 
 
 
 
 
 
1360
1361	kfree(file_priv->g2d_priv);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1362}
1363
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1364static int g2d_probe(struct platform_device *pdev)
1365{
1366	struct device *dev = &pdev->dev;
1367	struct resource *res;
1368	struct g2d_data *g2d;
1369	struct exynos_drm_subdrv *subdrv;
1370	int ret;
1371
1372	g2d = devm_kzalloc(dev, sizeof(*g2d), GFP_KERNEL);
1373	if (!g2d)
1374		return -ENOMEM;
1375
1376	g2d->runqueue_slab = kmem_cache_create("g2d_runqueue_slab",
1377			sizeof(struct g2d_runqueue_node), 0, 0, NULL);
1378	if (!g2d->runqueue_slab)
1379		return -ENOMEM;
1380
1381	g2d->dev = dev;
1382
1383	g2d->g2d_workq = create_singlethread_workqueue("g2d");
1384	if (!g2d->g2d_workq) {
1385		dev_err(dev, "failed to create workqueue\n");
1386		ret = -EINVAL;
1387		goto err_destroy_slab;
1388	}
1389
1390	INIT_WORK(&g2d->runqueue_work, g2d_runqueue_worker);
1391	INIT_LIST_HEAD(&g2d->free_cmdlist);
1392	INIT_LIST_HEAD(&g2d->runqueue);
1393
1394	mutex_init(&g2d->cmdlist_mutex);
1395	mutex_init(&g2d->runqueue_mutex);
1396
1397	g2d->gate_clk = devm_clk_get(dev, "fimg2d");
1398	if (IS_ERR(g2d->gate_clk)) {
1399		dev_err(dev, "failed to get gate clock\n");
1400		ret = PTR_ERR(g2d->gate_clk);
1401		goto err_destroy_workqueue;
1402	}
1403
 
 
1404	pm_runtime_enable(dev);
 
 
1405
1406	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1407
1408	g2d->regs = devm_ioremap_resource(dev, res);
1409	if (IS_ERR(g2d->regs)) {
1410		ret = PTR_ERR(g2d->regs);
1411		goto err_put_clk;
1412	}
1413
1414	g2d->irq = platform_get_irq(pdev, 0);
1415	if (g2d->irq < 0) {
1416		dev_err(dev, "failed to get irq\n");
1417		ret = g2d->irq;
1418		goto err_put_clk;
1419	}
1420
1421	ret = devm_request_irq(dev, g2d->irq, g2d_irq_handler, 0,
1422								"drm_g2d", g2d);
1423	if (ret < 0) {
1424		dev_err(dev, "irq request failed\n");
1425		goto err_put_clk;
1426	}
1427
1428	g2d->max_pool = MAX_POOL;
1429
1430	platform_set_drvdata(pdev, g2d);
1431
1432	subdrv = &g2d->subdrv;
1433	subdrv->dev = dev;
1434	subdrv->probe = g2d_subdrv_probe;
1435	subdrv->remove = g2d_subdrv_remove;
1436	subdrv->open = g2d_open;
1437	subdrv->close = g2d_close;
1438
1439	ret = exynos_drm_subdrv_register(subdrv);
1440	if (ret < 0) {
1441		dev_err(dev, "failed to register drm g2d device\n");
1442		goto err_put_clk;
1443	}
1444
1445	dev_info(dev, "The exynos g2d(ver %d.%d) successfully probed\n",
1446			G2D_HW_MAJOR_VER, G2D_HW_MINOR_VER);
1447
1448	return 0;
1449
1450err_put_clk:
1451	pm_runtime_disable(dev);
1452err_destroy_workqueue:
1453	destroy_workqueue(g2d->g2d_workq);
1454err_destroy_slab:
1455	kmem_cache_destroy(g2d->runqueue_slab);
1456	return ret;
1457}
1458
1459static int g2d_remove(struct platform_device *pdev)
1460{
1461	struct g2d_data *g2d = platform_get_drvdata(pdev);
1462
1463	cancel_work_sync(&g2d->runqueue_work);
1464	exynos_drm_subdrv_unregister(&g2d->subdrv);
1465
1466	while (g2d->runqueue_node) {
1467		g2d_free_runqueue_node(g2d, g2d->runqueue_node);
1468		g2d->runqueue_node = g2d_get_runqueue_node(g2d);
1469	}
1470
 
1471	pm_runtime_disable(&pdev->dev);
1472
1473	g2d_fini_cmdlist(g2d);
1474	destroy_workqueue(g2d->g2d_workq);
1475	kmem_cache_destroy(g2d->runqueue_slab);
1476
1477	return 0;
1478}
1479
1480#ifdef CONFIG_PM_SLEEP
1481static int g2d_suspend(struct device *dev)
1482{
1483	struct g2d_data *g2d = dev_get_drvdata(dev);
1484
1485	mutex_lock(&g2d->runqueue_mutex);
1486	g2d->suspended = true;
1487	mutex_unlock(&g2d->runqueue_mutex);
1488
1489	while (g2d->runqueue_node)
1490		/* FIXME: good range? */
1491		usleep_range(500, 1000);
1492
1493	flush_work(&g2d->runqueue_work);
1494
1495	return 0;
1496}
1497
1498static int g2d_resume(struct device *dev)
1499{
1500	struct g2d_data *g2d = dev_get_drvdata(dev);
1501
1502	g2d->suspended = false;
1503	g2d_exec_runqueue(g2d);
1504
1505	return 0;
1506}
1507#endif
1508
1509#ifdef CONFIG_PM
1510static int g2d_runtime_suspend(struct device *dev)
1511{
1512	struct g2d_data *g2d = dev_get_drvdata(dev);
1513
1514	clk_disable_unprepare(g2d->gate_clk);
1515
1516	return 0;
1517}
1518
1519static int g2d_runtime_resume(struct device *dev)
1520{
1521	struct g2d_data *g2d = dev_get_drvdata(dev);
1522	int ret;
1523
1524	ret = clk_prepare_enable(g2d->gate_clk);
1525	if (ret < 0)
1526		dev_warn(dev, "failed to enable clock.\n");
1527
1528	return ret;
1529}
1530#endif
1531
1532static const struct dev_pm_ops g2d_pm_ops = {
1533	SET_SYSTEM_SLEEP_PM_OPS(g2d_suspend, g2d_resume)
1534	SET_RUNTIME_PM_OPS(g2d_runtime_suspend, g2d_runtime_resume, NULL)
1535};
1536
1537static const struct of_device_id exynos_g2d_match[] = {
1538	{ .compatible = "samsung,exynos5250-g2d" },
1539	{ .compatible = "samsung,exynos4212-g2d" },
1540	{},
1541};
1542MODULE_DEVICE_TABLE(of, exynos_g2d_match);
1543
1544struct platform_driver g2d_driver = {
1545	.probe		= g2d_probe,
1546	.remove		= g2d_remove,
1547	.driver		= {
1548		.name	= "s5p-g2d",
1549		.owner	= THIS_MODULE,
1550		.pm	= &g2d_pm_ops,
1551		.of_match_table = exynos_g2d_match,
1552	},
1553};
v6.2
   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * Copyright (C) 2012 Samsung Electronics Co.Ltd
   4 * Authors: Joonyoung Shim <jy0922.shim@samsung.com>
 
 
 
 
   5 */
   6
   7#include <linux/refcount.h>
   8#include <linux/clk.h>
   9#include <linux/component.h>
  10#include <linux/delay.h>
  11#include <linux/dma-mapping.h>
  12#include <linux/err.h>
  13#include <linux/interrupt.h>
  14#include <linux/io.h>
  15#include <linux/kernel.h>
  16#include <linux/of.h>
  17#include <linux/platform_device.h>
  18#include <linux/pm_runtime.h>
  19#include <linux/slab.h>
  20#include <linux/uaccess.h>
  21#include <linux/workqueue.h>
 
 
 
  22
  23#include <drm/drm_file.h>
  24#include <drm/exynos_drm.h>
  25
  26#include "exynos_drm_drv.h"
  27#include "exynos_drm_g2d.h"
  28#include "exynos_drm_gem.h"
 
  29
  30#define G2D_HW_MAJOR_VER		4
  31#define G2D_HW_MINOR_VER		1
  32
  33/* vaild register range set from user: 0x0104 ~ 0x0880 */
  34#define G2D_VALID_START			0x0104
  35#define G2D_VALID_END			0x0880
  36
  37/* general registers */
  38#define G2D_SOFT_RESET			0x0000
  39#define G2D_INTEN			0x0004
  40#define G2D_INTC_PEND			0x000C
  41#define G2D_DMA_SFR_BASE_ADDR		0x0080
  42#define G2D_DMA_COMMAND			0x0084
  43#define G2D_DMA_STATUS			0x008C
  44#define G2D_DMA_HOLD_CMD		0x0090
  45
  46/* command registers */
  47#define G2D_BITBLT_START		0x0100
  48
  49/* registers for base address */
  50#define G2D_SRC_BASE_ADDR		0x0304
  51#define G2D_SRC_STRIDE			0x0308
  52#define G2D_SRC_COLOR_MODE		0x030C
  53#define G2D_SRC_LEFT_TOP		0x0310
  54#define G2D_SRC_RIGHT_BOTTOM		0x0314
  55#define G2D_SRC_PLANE2_BASE_ADDR	0x0318
  56#define G2D_DST_BASE_ADDR		0x0404
  57#define G2D_DST_STRIDE			0x0408
  58#define G2D_DST_COLOR_MODE		0x040C
  59#define G2D_DST_LEFT_TOP		0x0410
  60#define G2D_DST_RIGHT_BOTTOM		0x0414
  61#define G2D_DST_PLANE2_BASE_ADDR	0x0418
  62#define G2D_PAT_BASE_ADDR		0x0500
  63#define G2D_MSK_BASE_ADDR		0x0520
  64
  65/* G2D_SOFT_RESET */
  66#define G2D_SFRCLEAR			(1 << 1)
  67#define G2D_R				(1 << 0)
  68
  69/* G2D_INTEN */
  70#define G2D_INTEN_ACF			(1 << 3)
  71#define G2D_INTEN_UCF			(1 << 2)
  72#define G2D_INTEN_GCF			(1 << 1)
  73#define G2D_INTEN_SCF			(1 << 0)
  74
  75/* G2D_INTC_PEND */
  76#define G2D_INTP_ACMD_FIN		(1 << 3)
  77#define G2D_INTP_UCMD_FIN		(1 << 2)
  78#define G2D_INTP_GCMD_FIN		(1 << 1)
  79#define G2D_INTP_SCMD_FIN		(1 << 0)
  80
  81/* G2D_DMA_COMMAND */
  82#define G2D_DMA_HALT			(1 << 2)
  83#define G2D_DMA_CONTINUE		(1 << 1)
  84#define G2D_DMA_START			(1 << 0)
  85
  86/* G2D_DMA_STATUS */
  87#define G2D_DMA_LIST_DONE_COUNT		(0xFF << 17)
  88#define G2D_DMA_BITBLT_DONE_COUNT	(0xFFFF << 1)
  89#define G2D_DMA_DONE			(1 << 0)
  90#define G2D_DMA_LIST_DONE_COUNT_OFFSET	17
  91
  92/* G2D_DMA_HOLD_CMD */
  93#define G2D_USER_HOLD			(1 << 2)
  94#define G2D_LIST_HOLD			(1 << 1)
  95#define G2D_BITBLT_HOLD			(1 << 0)
  96
  97/* G2D_BITBLT_START */
  98#define G2D_START_CASESEL		(1 << 2)
  99#define G2D_START_NHOLT			(1 << 1)
 100#define G2D_START_BITBLT		(1 << 0)
 101
 102/* buffer color format */
 103#define G2D_FMT_XRGB8888		0
 104#define G2D_FMT_ARGB8888		1
 105#define G2D_FMT_RGB565			2
 106#define G2D_FMT_XRGB1555		3
 107#define G2D_FMT_ARGB1555		4
 108#define G2D_FMT_XRGB4444		5
 109#define G2D_FMT_ARGB4444		6
 110#define G2D_FMT_PACKED_RGB888		7
 111#define G2D_FMT_A8			11
 112#define G2D_FMT_L8			12
 113
 114/* buffer valid length */
 115#define G2D_LEN_MIN			1
 116#define G2D_LEN_MAX			8000
 117
 118#define G2D_CMDLIST_SIZE		(PAGE_SIZE / 4)
 119#define G2D_CMDLIST_NUM			64
 120#define G2D_CMDLIST_POOL_SIZE		(G2D_CMDLIST_SIZE * G2D_CMDLIST_NUM)
 121#define G2D_CMDLIST_DATA_NUM		(G2D_CMDLIST_SIZE / sizeof(u32) - 2)
 122
 123/* maximum buffer pool size of userptr is 64MB as default */
 124#define MAX_POOL		(64 * 1024 * 1024)
 125
 126enum {
 127	BUF_TYPE_GEM = 1,
 128	BUF_TYPE_USERPTR,
 129};
 130
 131enum g2d_reg_type {
 132	REG_TYPE_NONE = -1,
 133	REG_TYPE_SRC,
 134	REG_TYPE_SRC_PLANE2,
 135	REG_TYPE_DST,
 136	REG_TYPE_DST_PLANE2,
 137	REG_TYPE_PAT,
 138	REG_TYPE_MSK,
 139	MAX_REG_TYPE_NR
 140};
 141
 142enum g2d_flag_bits {
 143	/*
 144	 * If set, suspends the runqueue worker after the currently
 145	 * processed node is finished.
 146	 */
 147	G2D_BIT_SUSPEND_RUNQUEUE,
 148	/*
 149	 * If set, indicates that the engine is currently busy.
 150	 */
 151	G2D_BIT_ENGINE_BUSY,
 152};
 153
 154/* cmdlist data structure */
 155struct g2d_cmdlist {
 156	u32		head;
 157	unsigned long	data[G2D_CMDLIST_DATA_NUM];
 158	u32		last;	/* last data offset */
 159};
 160
 161/*
 162 * A structure of buffer description
 163 *
 164 * @format: color format
 165 * @stride: buffer stride/pitch in bytes
 166 * @left_x: the x coordinates of left top corner
 167 * @top_y: the y coordinates of left top corner
 168 * @right_x: the x coordinates of right bottom corner
 169 * @bottom_y: the y coordinates of right bottom corner
 170 *
 171 */
 172struct g2d_buf_desc {
 173	unsigned int	format;
 174	unsigned int	stride;
 175	unsigned int	left_x;
 176	unsigned int	top_y;
 177	unsigned int	right_x;
 178	unsigned int	bottom_y;
 179};
 180
 181/*
 182 * A structure of buffer information
 183 *
 184 * @map_nr: manages the number of mapped buffers
 185 * @reg_types: stores regitster type in the order of requested command
 186 * @handles: stores buffer handle in its reg_type position
 187 * @types: stores buffer type in its reg_type position
 188 * @descs: stores buffer description in its reg_type position
 189 *
 190 */
 191struct g2d_buf_info {
 192	unsigned int		map_nr;
 193	enum g2d_reg_type	reg_types[MAX_REG_TYPE_NR];
 194	void			*obj[MAX_REG_TYPE_NR];
 195	unsigned int		types[MAX_REG_TYPE_NR];
 196	struct g2d_buf_desc	descs[MAX_REG_TYPE_NR];
 197};
 198
 199struct drm_exynos_pending_g2d_event {
 200	struct drm_pending_event	base;
 201	struct drm_exynos_g2d_event	event;
 202};
 203
 204struct g2d_cmdlist_userptr {
 205	struct list_head	list;
 206	dma_addr_t		dma_addr;
 207	unsigned long		userptr;
 208	unsigned long		size;
 209	struct page		**pages;
 210	unsigned int		npages;
 211	struct sg_table		*sgt;
 212	refcount_t		refcount;
 213	bool			in_pool;
 214	bool			out_of_list;
 215};
 216struct g2d_cmdlist_node {
 217	struct list_head	list;
 218	struct g2d_cmdlist	*cmdlist;
 219	dma_addr_t		dma_addr;
 220	struct g2d_buf_info	buf_info;
 221
 222	struct drm_exynos_pending_g2d_event	*event;
 223};
 224
 225struct g2d_runqueue_node {
 226	struct list_head	list;
 227	struct list_head	run_cmdlist;
 228	struct list_head	event_list;
 229	struct drm_file		*filp;
 230	pid_t			pid;
 231	struct completion	complete;
 232	int			async;
 233};
 234
 235struct g2d_data {
 236	struct device			*dev;
 237	void				*dma_priv;
 238	struct clk			*gate_clk;
 239	void __iomem			*regs;
 240	int				irq;
 241	struct workqueue_struct		*g2d_workq;
 242	struct work_struct		runqueue_work;
 243	struct drm_device		*drm_dev;
 244	unsigned long			flags;
 245
 246	/* cmdlist */
 247	struct g2d_cmdlist_node		*cmdlist_node;
 248	struct list_head		free_cmdlist;
 249	struct mutex			cmdlist_mutex;
 250	dma_addr_t			cmdlist_pool;
 251	void				*cmdlist_pool_virt;
 252	unsigned long			cmdlist_dma_attrs;
 253
 254	/* runqueue*/
 255	struct g2d_runqueue_node	*runqueue_node;
 256	struct list_head		runqueue;
 257	struct mutex			runqueue_mutex;
 258	struct kmem_cache		*runqueue_slab;
 259
 260	unsigned long			current_pool;
 261	unsigned long			max_pool;
 262};
 263
 264static inline void g2d_hw_reset(struct g2d_data *g2d)
 265{
 266	writel(G2D_R | G2D_SFRCLEAR, g2d->regs + G2D_SOFT_RESET);
 267	clear_bit(G2D_BIT_ENGINE_BUSY, &g2d->flags);
 268}
 269
 270static int g2d_init_cmdlist(struct g2d_data *g2d)
 271{
 272	struct device *dev = g2d->dev;
 273	struct g2d_cmdlist_node *node;
 
 274	int nr;
 275	int ret;
 276	struct g2d_buf_info *buf_info;
 277
 278	g2d->cmdlist_dma_attrs = DMA_ATTR_WRITE_COMBINE;
 
 279
 280	g2d->cmdlist_pool_virt = dma_alloc_attrs(to_dma_dev(g2d->drm_dev),
 281						G2D_CMDLIST_POOL_SIZE,
 282						&g2d->cmdlist_pool, GFP_KERNEL,
 283						g2d->cmdlist_dma_attrs);
 284	if (!g2d->cmdlist_pool_virt) {
 285		dev_err(dev, "failed to allocate dma memory\n");
 286		return -ENOMEM;
 287	}
 288
 289	node = kcalloc(G2D_CMDLIST_NUM, sizeof(*node), GFP_KERNEL);
 290	if (!node) {
 
 291		ret = -ENOMEM;
 292		goto err;
 293	}
 294
 295	for (nr = 0; nr < G2D_CMDLIST_NUM; nr++) {
 296		unsigned int i;
 297
 298		node[nr].cmdlist =
 299			g2d->cmdlist_pool_virt + nr * G2D_CMDLIST_SIZE;
 300		node[nr].dma_addr =
 301			g2d->cmdlist_pool + nr * G2D_CMDLIST_SIZE;
 302
 303		buf_info = &node[nr].buf_info;
 304		for (i = 0; i < MAX_REG_TYPE_NR; i++)
 305			buf_info->reg_types[i] = REG_TYPE_NONE;
 306
 307		list_add_tail(&node[nr].list, &g2d->free_cmdlist);
 308	}
 309
 310	return 0;
 311
 312err:
 313	dma_free_attrs(to_dma_dev(g2d->drm_dev), G2D_CMDLIST_POOL_SIZE,
 314			g2d->cmdlist_pool_virt,
 315			g2d->cmdlist_pool, g2d->cmdlist_dma_attrs);
 316	return ret;
 317}
 318
 319static void g2d_fini_cmdlist(struct g2d_data *g2d)
 320{
 
 
 321	kfree(g2d->cmdlist_node);
 322
 323	if (g2d->cmdlist_pool_virt && g2d->cmdlist_pool) {
 324		dma_free_attrs(to_dma_dev(g2d->drm_dev),
 325				G2D_CMDLIST_POOL_SIZE,
 326				g2d->cmdlist_pool_virt,
 327				g2d->cmdlist_pool, g2d->cmdlist_dma_attrs);
 328	}
 329}
 330
 331static struct g2d_cmdlist_node *g2d_get_cmdlist(struct g2d_data *g2d)
 332{
 333	struct device *dev = g2d->dev;
 334	struct g2d_cmdlist_node *node;
 335
 336	mutex_lock(&g2d->cmdlist_mutex);
 337	if (list_empty(&g2d->free_cmdlist)) {
 338		dev_err(dev, "there is no free cmdlist\n");
 339		mutex_unlock(&g2d->cmdlist_mutex);
 340		return NULL;
 341	}
 342
 343	node = list_first_entry(&g2d->free_cmdlist, struct g2d_cmdlist_node,
 344				list);
 345	list_del_init(&node->list);
 346	mutex_unlock(&g2d->cmdlist_mutex);
 347
 348	return node;
 349}
 350
 351static void g2d_put_cmdlist(struct g2d_data *g2d, struct g2d_cmdlist_node *node)
 352{
 353	mutex_lock(&g2d->cmdlist_mutex);
 354	list_move_tail(&node->list, &g2d->free_cmdlist);
 355	mutex_unlock(&g2d->cmdlist_mutex);
 356}
 357
 358static void g2d_add_cmdlist_to_inuse(struct drm_exynos_file_private *file_priv,
 359				     struct g2d_cmdlist_node *node)
 360{
 361	struct g2d_cmdlist_node *lnode;
 362
 363	if (list_empty(&file_priv->inuse_cmdlist))
 364		goto add_to_list;
 365
 366	/* this links to base address of new cmdlist */
 367	lnode = list_entry(file_priv->inuse_cmdlist.prev,
 368				struct g2d_cmdlist_node, list);
 369	lnode->cmdlist->data[lnode->cmdlist->last] = node->dma_addr;
 370
 371add_to_list:
 372	list_add_tail(&node->list, &file_priv->inuse_cmdlist);
 373
 374	if (node->event)
 375		list_add_tail(&node->event->base.link, &file_priv->event_list);
 376}
 377
 378static void g2d_userptr_put_dma_addr(struct g2d_data *g2d,
 379					void *obj,
 380					bool force)
 381{
 382	struct g2d_cmdlist_userptr *g2d_userptr = obj;
 
 
 383
 384	if (!obj)
 385		return;
 386
 387	if (force)
 388		goto out;
 389
 390	refcount_dec(&g2d_userptr->refcount);
 391
 392	if (refcount_read(&g2d_userptr->refcount) > 0)
 393		return;
 394
 395	if (g2d_userptr->in_pool)
 396		return;
 397
 398out:
 399	dma_unmap_sgtable(to_dma_dev(g2d->drm_dev), g2d_userptr->sgt,
 400			  DMA_BIDIRECTIONAL, 0);
 401
 402	unpin_user_pages_dirty_lock(g2d_userptr->pages, g2d_userptr->npages,
 403				    true);
 404	kvfree(g2d_userptr->pages);
 
 
 
 
 
 
 405
 406	if (!g2d_userptr->out_of_list)
 407		list_del_init(&g2d_userptr->list);
 408
 409	sg_free_table(g2d_userptr->sgt);
 410	kfree(g2d_userptr->sgt);
 411	kfree(g2d_userptr);
 412}
 413
 414static dma_addr_t *g2d_userptr_get_dma_addr(struct g2d_data *g2d,
 415					unsigned long userptr,
 416					unsigned long size,
 417					struct drm_file *filp,
 418					void **obj)
 419{
 420	struct drm_exynos_file_private *file_priv = filp->driver_priv;
 
 421	struct g2d_cmdlist_userptr *g2d_userptr;
 
 422	struct sg_table	*sgt;
 423	unsigned long start, end;
 424	unsigned int npages, offset;
 425	int ret;
 426
 427	if (!size) {
 428		DRM_DEV_ERROR(g2d->dev, "invalid userptr size.\n");
 429		return ERR_PTR(-EINVAL);
 430	}
 431
 
 
 432	/* check if userptr already exists in userptr_list. */
 433	list_for_each_entry(g2d_userptr, &file_priv->userptr_list, list) {
 434		if (g2d_userptr->userptr == userptr) {
 435			/*
 436			 * also check size because there could be same address
 437			 * and different size.
 438			 */
 439			if (g2d_userptr->size == size) {
 440				refcount_inc(&g2d_userptr->refcount);
 441				*obj = g2d_userptr;
 442
 443				return &g2d_userptr->dma_addr;
 444			}
 445
 446			/*
 447			 * at this moment, maybe g2d dma is accessing this
 448			 * g2d_userptr memory region so just remove this
 449			 * g2d_userptr object from userptr_list not to be
 450			 * referred again and also except it the userptr
 451			 * pool to be released after the dma access completion.
 452			 */
 453			g2d_userptr->out_of_list = true;
 454			g2d_userptr->in_pool = false;
 455			list_del_init(&g2d_userptr->list);
 456
 457			break;
 458		}
 459	}
 460
 461	g2d_userptr = kzalloc(sizeof(*g2d_userptr), GFP_KERNEL);
 462	if (!g2d_userptr)
 463		return ERR_PTR(-ENOMEM);
 464
 465	refcount_set(&g2d_userptr->refcount, 1);
 466	g2d_userptr->size = size;
 467
 468	start = userptr & PAGE_MASK;
 469	offset = userptr & ~PAGE_MASK;
 470	end = PAGE_ALIGN(userptr + size);
 471	npages = (end - start) >> PAGE_SHIFT;
 472	g2d_userptr->pages = kvmalloc_array(npages, sizeof(*g2d_userptr->pages),
 473					    GFP_KERNEL);
 474	if (!g2d_userptr->pages) {
 475		ret = -ENOMEM;
 476		goto err_free;
 477	}
 478
 479	ret = pin_user_pages_fast(start, npages,
 480				  FOLL_WRITE | FOLL_LONGTERM,
 481				  g2d_userptr->pages);
 482	if (ret != npages) {
 483		DRM_DEV_ERROR(g2d->dev,
 484			      "failed to get user pages from userptr.\n");
 485		if (ret < 0)
 486			goto err_destroy_pages;
 487		npages = ret;
 488		ret = -EFAULT;
 489		goto err_unpin_pages;
 
 
 
 
 490	}
 491	g2d_userptr->npages = npages;
 492
 493	sgt = kzalloc(sizeof(*sgt), GFP_KERNEL);
 494	if (!sgt) {
 495		ret = -ENOMEM;
 496		goto err_unpin_pages;
 497	}
 498
 499	ret = sg_alloc_table_from_pages(sgt,
 500					g2d_userptr->pages,
 501					npages, offset, size, GFP_KERNEL);
 502	if (ret < 0) {
 503		DRM_DEV_ERROR(g2d->dev, "failed to get sgt from pages.\n");
 504		goto err_free_sgt;
 505	}
 506
 507	g2d_userptr->sgt = sgt;
 508
 509	ret = dma_map_sgtable(to_dma_dev(g2d->drm_dev), sgt,
 510			      DMA_BIDIRECTIONAL, 0);
 511	if (ret) {
 512		DRM_DEV_ERROR(g2d->dev, "failed to map sgt with dma region.\n");
 513		goto err_sg_free_table;
 514	}
 515
 516	g2d_userptr->dma_addr = sgt->sgl[0].dma_address;
 517	g2d_userptr->userptr = userptr;
 518
 519	list_add_tail(&g2d_userptr->list, &file_priv->userptr_list);
 520
 521	if (g2d->current_pool + (npages << PAGE_SHIFT) < g2d->max_pool) {
 522		g2d->current_pool += npages << PAGE_SHIFT;
 523		g2d_userptr->in_pool = true;
 524	}
 525
 526	*obj = g2d_userptr;
 527
 528	return &g2d_userptr->dma_addr;
 529
 530err_sg_free_table:
 531	sg_free_table(sgt);
 532
 533err_free_sgt:
 534	kfree(sgt);
 535
 536err_unpin_pages:
 537	unpin_user_pages(g2d_userptr->pages, npages);
 538
 539err_destroy_pages:
 540	kvfree(g2d_userptr->pages);
 541
 542err_free:
 543	kfree(g2d_userptr);
 544
 545	return ERR_PTR(ret);
 546}
 547
 548static void g2d_userptr_free_all(struct g2d_data *g2d, struct drm_file *filp)
 
 
 549{
 550	struct drm_exynos_file_private *file_priv = filp->driver_priv;
 
 551	struct g2d_cmdlist_userptr *g2d_userptr, *n;
 552
 553	list_for_each_entry_safe(g2d_userptr, n, &file_priv->userptr_list, list)
 554		if (g2d_userptr->in_pool)
 555			g2d_userptr_put_dma_addr(g2d, g2d_userptr, true);
 
 
 556
 557	g2d->current_pool = 0;
 558}
 559
 560static enum g2d_reg_type g2d_get_reg_type(struct g2d_data *g2d, int reg_offset)
 561{
 562	enum g2d_reg_type reg_type;
 563
 564	switch (reg_offset) {
 565	case G2D_SRC_BASE_ADDR:
 566	case G2D_SRC_STRIDE:
 567	case G2D_SRC_COLOR_MODE:
 568	case G2D_SRC_LEFT_TOP:
 569	case G2D_SRC_RIGHT_BOTTOM:
 570		reg_type = REG_TYPE_SRC;
 571		break;
 572	case G2D_SRC_PLANE2_BASE_ADDR:
 573		reg_type = REG_TYPE_SRC_PLANE2;
 574		break;
 575	case G2D_DST_BASE_ADDR:
 576	case G2D_DST_STRIDE:
 577	case G2D_DST_COLOR_MODE:
 578	case G2D_DST_LEFT_TOP:
 579	case G2D_DST_RIGHT_BOTTOM:
 580		reg_type = REG_TYPE_DST;
 581		break;
 582	case G2D_DST_PLANE2_BASE_ADDR:
 583		reg_type = REG_TYPE_DST_PLANE2;
 584		break;
 585	case G2D_PAT_BASE_ADDR:
 586		reg_type = REG_TYPE_PAT;
 587		break;
 588	case G2D_MSK_BASE_ADDR:
 589		reg_type = REG_TYPE_MSK;
 590		break;
 591	default:
 592		reg_type = REG_TYPE_NONE;
 593		DRM_DEV_ERROR(g2d->dev, "Unknown register offset![%d]\n",
 594			      reg_offset);
 595		break;
 596	}
 597
 598	return reg_type;
 599}
 600
 601static unsigned long g2d_get_buf_bpp(unsigned int format)
 602{
 603	unsigned long bpp;
 604
 605	switch (format) {
 606	case G2D_FMT_XRGB8888:
 607	case G2D_FMT_ARGB8888:
 608		bpp = 4;
 609		break;
 610	case G2D_FMT_RGB565:
 611	case G2D_FMT_XRGB1555:
 612	case G2D_FMT_ARGB1555:
 613	case G2D_FMT_XRGB4444:
 614	case G2D_FMT_ARGB4444:
 615		bpp = 2;
 616		break;
 617	case G2D_FMT_PACKED_RGB888:
 618		bpp = 3;
 619		break;
 620	default:
 621		bpp = 1;
 622		break;
 623	}
 624
 625	return bpp;
 626}
 627
 628static bool g2d_check_buf_desc_is_valid(struct g2d_data *g2d,
 629					struct g2d_buf_desc *buf_desc,
 630					enum g2d_reg_type reg_type,
 631					unsigned long size)
 632{
 633	int width, height;
 634	unsigned long bpp, last_pos;
 635
 636	/*
 637	 * check source and destination buffers only.
 638	 * so the others are always valid.
 639	 */
 640	if (reg_type != REG_TYPE_SRC && reg_type != REG_TYPE_DST)
 641		return true;
 642
 643	/* This check also makes sure that right_x > left_x. */
 644	width = (int)buf_desc->right_x - (int)buf_desc->left_x;
 645	if (width < G2D_LEN_MIN || width > G2D_LEN_MAX) {
 646		DRM_DEV_ERROR(g2d->dev, "width[%d] is out of range!\n", width);
 647		return false;
 648	}
 649
 650	/* This check also makes sure that bottom_y > top_y. */
 651	height = (int)buf_desc->bottom_y - (int)buf_desc->top_y;
 652	if (height < G2D_LEN_MIN || height > G2D_LEN_MAX) {
 653		DRM_DEV_ERROR(g2d->dev,
 654			      "height[%d] is out of range!\n", height);
 655		return false;
 656	}
 657
 658	bpp = g2d_get_buf_bpp(buf_desc->format);
 659
 660	/* Compute the position of the last byte that the engine accesses. */
 661	last_pos = ((unsigned long)buf_desc->bottom_y - 1) *
 662		(unsigned long)buf_desc->stride +
 663		(unsigned long)buf_desc->right_x * bpp - 1;
 664
 665	/*
 666	 * Since right_x > left_x and bottom_y > top_y we already know
 667	 * that the first_pos < last_pos (first_pos being the position
 668	 * of the first byte the engine accesses), it just remains to
 669	 * check if last_pos is smaller then the buffer size.
 670	 */
 671
 672	if (last_pos >= size) {
 673		DRM_DEV_ERROR(g2d->dev, "last engine access position [%lu] "
 674			      "is out of range [%lu]!\n", last_pos, size);
 675		return false;
 676	}
 677
 678	return true;
 679}
 680
 681static int g2d_map_cmdlist_gem(struct g2d_data *g2d,
 682				struct g2d_cmdlist_node *node,
 683				struct drm_device *drm_dev,
 684				struct drm_file *file)
 685{
 686	struct g2d_cmdlist *cmdlist = node->cmdlist;
 687	struct g2d_buf_info *buf_info = &node->buf_info;
 688	int offset;
 689	int ret;
 690	int i;
 691
 692	for (i = 0; i < buf_info->map_nr; i++) {
 693		struct g2d_buf_desc *buf_desc;
 694		enum g2d_reg_type reg_type;
 695		int reg_pos;
 696		unsigned long handle;
 697		dma_addr_t *addr;
 698
 699		reg_pos = cmdlist->last - 2 * (i + 1);
 700
 701		offset = cmdlist->data[reg_pos];
 702		handle = cmdlist->data[reg_pos + 1];
 703
 704		reg_type = g2d_get_reg_type(g2d, offset);
 705		if (reg_type == REG_TYPE_NONE) {
 706			ret = -EFAULT;
 707			goto err;
 708		}
 709
 710		buf_desc = &buf_info->descs[reg_type];
 711
 712		if (buf_info->types[reg_type] == BUF_TYPE_GEM) {
 713			struct exynos_drm_gem *exynos_gem;
 714
 715			exynos_gem = exynos_drm_gem_get(file, handle);
 716			if (!exynos_gem) {
 717				ret = -EFAULT;
 718				goto err;
 719			}
 720
 721			if (!g2d_check_buf_desc_is_valid(g2d, buf_desc,
 722							 reg_type, exynos_gem->size)) {
 723				exynos_drm_gem_put(exynos_gem);
 724				ret = -EFAULT;
 725				goto err;
 726			}
 727
 728			addr = &exynos_gem->dma_addr;
 729			buf_info->obj[reg_type] = exynos_gem;
 
 
 
 
 730		} else {
 731			struct drm_exynos_g2d_userptr g2d_userptr;
 732
 733			if (copy_from_user(&g2d_userptr, (void __user *)handle,
 734				sizeof(struct drm_exynos_g2d_userptr))) {
 735				ret = -EFAULT;
 736				goto err;
 737			}
 738
 739			if (!g2d_check_buf_desc_is_valid(g2d, buf_desc,
 740							 reg_type,
 741							 g2d_userptr.size)) {
 742				ret = -EFAULT;
 743				goto err;
 744			}
 745
 746			addr = g2d_userptr_get_dma_addr(g2d,
 747							g2d_userptr.userptr,
 748							g2d_userptr.size,
 749							file,
 750							&buf_info->obj[reg_type]);
 751			if (IS_ERR(addr)) {
 752				ret = -EFAULT;
 753				goto err;
 754			}
 755		}
 756
 757		cmdlist->data[reg_pos + 1] = *addr;
 758		buf_info->reg_types[i] = reg_type;
 
 759	}
 760
 761	return 0;
 762
 763err:
 764	buf_info->map_nr = i;
 765	return ret;
 766}
 767
 768static void g2d_unmap_cmdlist_gem(struct g2d_data *g2d,
 769				  struct g2d_cmdlist_node *node,
 770				  struct drm_file *filp)
 771{
 
 772	struct g2d_buf_info *buf_info = &node->buf_info;
 773	int i;
 774
 775	for (i = 0; i < buf_info->map_nr; i++) {
 776		struct g2d_buf_desc *buf_desc;
 777		enum g2d_reg_type reg_type;
 778		void *obj;
 779
 780		reg_type = buf_info->reg_types[i];
 781
 782		buf_desc = &buf_info->descs[reg_type];
 783		obj = buf_info->obj[reg_type];
 784
 785		if (buf_info->types[reg_type] == BUF_TYPE_GEM)
 786			exynos_drm_gem_put(obj);
 
 787		else
 788			g2d_userptr_put_dma_addr(g2d, obj, false);
 
 789
 790		buf_info->reg_types[i] = REG_TYPE_NONE;
 791		buf_info->obj[reg_type] = NULL;
 792		buf_info->types[reg_type] = 0;
 793		memset(buf_desc, 0x00, sizeof(*buf_desc));
 794	}
 795
 796	buf_info->map_nr = 0;
 797}
 798
 799static void g2d_dma_start(struct g2d_data *g2d,
 800			  struct g2d_runqueue_node *runqueue_node)
 801{
 802	struct g2d_cmdlist_node *node =
 803				list_first_entry(&runqueue_node->run_cmdlist,
 804						struct g2d_cmdlist_node, list);
 
 
 
 
 
 805
 806	set_bit(G2D_BIT_ENGINE_BUSY, &g2d->flags);
 807	writel_relaxed(node->dma_addr, g2d->regs + G2D_DMA_SFR_BASE_ADDR);
 808	writel_relaxed(G2D_DMA_START, g2d->regs + G2D_DMA_COMMAND);
 809}
 810
 811static struct g2d_runqueue_node *g2d_get_runqueue_node(struct g2d_data *g2d)
 812{
 813	struct g2d_runqueue_node *runqueue_node;
 814
 815	if (list_empty(&g2d->runqueue))
 816		return NULL;
 817
 818	runqueue_node = list_first_entry(&g2d->runqueue,
 819					 struct g2d_runqueue_node, list);
 820	list_del_init(&runqueue_node->list);
 821	return runqueue_node;
 822}
 823
 824static void g2d_free_runqueue_node(struct g2d_data *g2d,
 825				   struct g2d_runqueue_node *runqueue_node)
 826{
 827	struct g2d_cmdlist_node *node;
 828
 
 
 
 829	mutex_lock(&g2d->cmdlist_mutex);
 830	/*
 831	 * commands in run_cmdlist have been completed so unmap all gem
 832	 * objects in each command node so that they are unreferenced.
 833	 */
 834	list_for_each_entry(node, &runqueue_node->run_cmdlist, list)
 835		g2d_unmap_cmdlist_gem(g2d, node, runqueue_node->filp);
 836	list_splice_tail_init(&runqueue_node->run_cmdlist, &g2d->free_cmdlist);
 837	mutex_unlock(&g2d->cmdlist_mutex);
 838
 839	kmem_cache_free(g2d->runqueue_slab, runqueue_node);
 840}
 841
 842/**
 843 * g2d_remove_runqueue_nodes - remove items from the list of runqueue nodes
 844 * @g2d: G2D state object
 845 * @file: if not zero, only remove items with this DRM file
 846 *
 847 * Has to be called under runqueue lock.
 848 */
 849static void g2d_remove_runqueue_nodes(struct g2d_data *g2d, struct drm_file *file)
 850{
 851	struct g2d_runqueue_node *node, *n;
 852
 853	if (list_empty(&g2d->runqueue))
 854		return;
 855
 856	list_for_each_entry_safe(node, n, &g2d->runqueue, list) {
 857		if (file && node->filp != file)
 858			continue;
 859
 860		list_del_init(&node->list);
 861		g2d_free_runqueue_node(g2d, node);
 862	}
 863}
 864
 865static void g2d_runqueue_worker(struct work_struct *work)
 866{
 867	struct g2d_data *g2d = container_of(work, struct g2d_data,
 868					    runqueue_work);
 869	struct g2d_runqueue_node *runqueue_node;
 870
 871	/*
 872	 * The engine is busy and the completion of the current node is going
 873	 * to poke the runqueue worker, so nothing to do here.
 874	 */
 875	if (test_bit(G2D_BIT_ENGINE_BUSY, &g2d->flags))
 876		return;
 877
 878	mutex_lock(&g2d->runqueue_mutex);
 
 879
 880	runqueue_node = g2d->runqueue_node;
 881	g2d->runqueue_node = NULL;
 882
 883	if (runqueue_node) {
 884		pm_runtime_mark_last_busy(g2d->dev);
 885		pm_runtime_put_autosuspend(g2d->dev);
 886
 887		complete(&runqueue_node->complete);
 888		if (runqueue_node->async)
 889			g2d_free_runqueue_node(g2d, runqueue_node);
 890	}
 891
 892	if (!test_bit(G2D_BIT_SUSPEND_RUNQUEUE, &g2d->flags)) {
 893		g2d->runqueue_node = g2d_get_runqueue_node(g2d);
 894
 895		if (g2d->runqueue_node) {
 896			int ret;
 897
 898			ret = pm_runtime_resume_and_get(g2d->dev);
 899			if (ret < 0) {
 900				dev_err(g2d->dev, "failed to enable G2D device.\n");
 901				goto out;
 902			}
 903
 904			g2d_dma_start(g2d, g2d->runqueue_node);
 905		}
 906	}
 907
 908out:
 909	mutex_unlock(&g2d->runqueue_mutex);
 910}
 911
 912static void g2d_finish_event(struct g2d_data *g2d, u32 cmdlist_no)
 913{
 914	struct drm_device *drm_dev = g2d->drm_dev;
 915	struct g2d_runqueue_node *runqueue_node = g2d->runqueue_node;
 916	struct drm_exynos_pending_g2d_event *e;
 917	struct timespec64 now;
 918
 919	if (list_empty(&runqueue_node->event_list))
 920		return;
 921
 922	e = list_first_entry(&runqueue_node->event_list,
 923			     struct drm_exynos_pending_g2d_event, base.link);
 924
 925	ktime_get_ts64(&now);
 926	e->event.tv_sec = now.tv_sec;
 927	e->event.tv_usec = now.tv_nsec / NSEC_PER_USEC;
 928	e->event.cmdlist_no = cmdlist_no;
 929
 930	drm_send_event(drm_dev, &e->base);
 931}
 932
 933static irqreturn_t g2d_irq_handler(int irq, void *dev_id)
 934{
 935	struct g2d_data *g2d = dev_id;
 936	u32 pending;
 937
 938	pending = readl_relaxed(g2d->regs + G2D_INTC_PEND);
 939	if (pending)
 940		writel_relaxed(pending, g2d->regs + G2D_INTC_PEND);
 941
 942	if (pending & G2D_INTP_GCMD_FIN) {
 943		u32 cmdlist_no = readl_relaxed(g2d->regs + G2D_DMA_STATUS);
 944
 945		cmdlist_no = (cmdlist_no & G2D_DMA_LIST_DONE_COUNT) >>
 946						G2D_DMA_LIST_DONE_COUNT_OFFSET;
 947
 948		g2d_finish_event(g2d, cmdlist_no);
 949
 950		writel_relaxed(0, g2d->regs + G2D_DMA_HOLD_CMD);
 951		if (!(pending & G2D_INTP_ACMD_FIN)) {
 952			writel_relaxed(G2D_DMA_CONTINUE,
 953					g2d->regs + G2D_DMA_COMMAND);
 954		}
 955	}
 956
 957	if (pending & G2D_INTP_ACMD_FIN) {
 958		clear_bit(G2D_BIT_ENGINE_BUSY, &g2d->flags);
 959		queue_work(g2d->g2d_workq, &g2d->runqueue_work);
 960	}
 961
 962	return IRQ_HANDLED;
 963}
 964
 965/**
 966 * g2d_wait_finish - wait for the G2D engine to finish the current runqueue node
 967 * @g2d: G2D state object
 968 * @file: if not zero, only wait if the current runqueue node belongs
 969 *        to the DRM file
 970 *
 971 * Should the engine not become idle after a 100ms timeout, a hardware
 972 * reset is issued.
 973 */
 974static void g2d_wait_finish(struct g2d_data *g2d, struct drm_file *file)
 975{
 976	struct device *dev = g2d->dev;
 977
 978	struct g2d_runqueue_node *runqueue_node = NULL;
 979	unsigned int tries = 10;
 980
 981	mutex_lock(&g2d->runqueue_mutex);
 982
 983	/* If no node is currently processed, we have nothing to do. */
 984	if (!g2d->runqueue_node)
 985		goto out;
 986
 987	runqueue_node = g2d->runqueue_node;
 988
 989	/* Check if the currently processed item belongs to us. */
 990	if (file && runqueue_node->filp != file)
 991		goto out;
 992
 993	mutex_unlock(&g2d->runqueue_mutex);
 994
 995	/* Wait for the G2D engine to finish. */
 996	while (tries-- && (g2d->runqueue_node == runqueue_node))
 997		mdelay(10);
 998
 999	mutex_lock(&g2d->runqueue_mutex);
1000
1001	if (g2d->runqueue_node != runqueue_node)
1002		goto out;
1003
1004	dev_err(dev, "wait timed out, resetting engine...\n");
1005	g2d_hw_reset(g2d);
1006
1007	/*
1008	 * After the hardware reset of the engine we are going to loose
1009	 * the IRQ which triggers the PM runtime put().
1010	 * So do this manually here.
1011	 */
1012	pm_runtime_mark_last_busy(dev);
1013	pm_runtime_put_autosuspend(dev);
1014
1015	complete(&runqueue_node->complete);
1016	if (runqueue_node->async)
1017		g2d_free_runqueue_node(g2d, runqueue_node);
1018
1019out:
1020	mutex_unlock(&g2d->runqueue_mutex);
1021}
1022
1023static int g2d_check_reg_offset(struct g2d_data *g2d,
1024				struct g2d_cmdlist_node *node,
1025				int nr, bool for_addr)
1026{
1027	struct g2d_cmdlist *cmdlist = node->cmdlist;
1028	int reg_offset;
1029	int index;
1030	int i;
1031
1032	for (i = 0; i < nr; i++) {
1033		struct g2d_buf_info *buf_info = &node->buf_info;
1034		struct g2d_buf_desc *buf_desc;
1035		enum g2d_reg_type reg_type;
1036		unsigned long value;
1037
1038		index = cmdlist->last - 2 * (i + 1);
1039
1040		reg_offset = cmdlist->data[index] & ~0xfffff000;
1041		if (reg_offset < G2D_VALID_START || reg_offset > G2D_VALID_END)
1042			goto err;
1043		if (reg_offset % 4)
1044			goto err;
1045
1046		switch (reg_offset) {
1047		case G2D_SRC_BASE_ADDR:
1048		case G2D_SRC_PLANE2_BASE_ADDR:
1049		case G2D_DST_BASE_ADDR:
1050		case G2D_DST_PLANE2_BASE_ADDR:
1051		case G2D_PAT_BASE_ADDR:
1052		case G2D_MSK_BASE_ADDR:
1053			if (!for_addr)
1054				goto err;
1055
1056			reg_type = g2d_get_reg_type(g2d, reg_offset);
1057
1058			/* check userptr buffer type. */
1059			if ((cmdlist->data[index] & ~0x7fffffff) >> 31) {
1060				buf_info->types[reg_type] = BUF_TYPE_USERPTR;
1061				cmdlist->data[index] &= ~G2D_BUF_USERPTR;
1062			} else
1063				buf_info->types[reg_type] = BUF_TYPE_GEM;
1064			break;
1065		case G2D_SRC_STRIDE:
1066		case G2D_DST_STRIDE:
1067			if (for_addr)
1068				goto err;
1069
1070			reg_type = g2d_get_reg_type(g2d, reg_offset);
1071
1072			buf_desc = &buf_info->descs[reg_type];
1073			buf_desc->stride = cmdlist->data[index + 1];
1074			break;
1075		case G2D_SRC_COLOR_MODE:
1076		case G2D_DST_COLOR_MODE:
1077			if (for_addr)
1078				goto err;
1079
1080			reg_type = g2d_get_reg_type(g2d, reg_offset);
1081
1082			buf_desc = &buf_info->descs[reg_type];
1083			value = cmdlist->data[index + 1];
1084
1085			buf_desc->format = value & 0xf;
1086			break;
1087		case G2D_SRC_LEFT_TOP:
1088		case G2D_DST_LEFT_TOP:
1089			if (for_addr)
1090				goto err;
1091
1092			reg_type = g2d_get_reg_type(g2d, reg_offset);
1093
1094			buf_desc = &buf_info->descs[reg_type];
1095			value = cmdlist->data[index + 1];
1096
1097			buf_desc->left_x = value & 0x1fff;
1098			buf_desc->top_y = (value & 0x1fff0000) >> 16;
1099			break;
1100		case G2D_SRC_RIGHT_BOTTOM:
1101		case G2D_DST_RIGHT_BOTTOM:
1102			if (for_addr)
1103				goto err;
1104
1105			reg_type = g2d_get_reg_type(g2d, reg_offset);
1106
1107			buf_desc = &buf_info->descs[reg_type];
1108			value = cmdlist->data[index + 1];
1109
1110			buf_desc->right_x = value & 0x1fff;
1111			buf_desc->bottom_y = (value & 0x1fff0000) >> 16;
1112			break;
1113		default:
1114			if (for_addr)
1115				goto err;
1116			break;
1117		}
1118	}
1119
1120	return 0;
1121
1122err:
1123	dev_err(g2d->dev, "Bad register offset: 0x%lx\n", cmdlist->data[index]);
1124	return -EINVAL;
1125}
1126
1127/* ioctl functions */
1128int exynos_g2d_get_ver_ioctl(struct drm_device *drm_dev, void *data,
1129			     struct drm_file *file)
1130{
 
 
 
 
1131	struct drm_exynos_g2d_get_ver *ver = data;
1132
 
 
 
 
 
 
 
 
 
 
 
1133	ver->major = G2D_HW_MAJOR_VER;
1134	ver->minor = G2D_HW_MINOR_VER;
1135
1136	return 0;
1137}
1138
1139int exynos_g2d_set_cmdlist_ioctl(struct drm_device *drm_dev, void *data,
1140				 struct drm_file *file)
1141{
1142	struct drm_exynos_file_private *file_priv = file->driver_priv;
1143	struct exynos_drm_private *priv = drm_dev->dev_private;
1144	struct g2d_data *g2d = dev_get_drvdata(priv->g2d_dev);
 
1145	struct drm_exynos_g2d_set_cmdlist *req = data;
1146	struct drm_exynos_g2d_cmd *cmd;
1147	struct drm_exynos_pending_g2d_event *e;
1148	struct g2d_cmdlist_node *node;
1149	struct g2d_cmdlist *cmdlist;
1150	int size;
1151	int ret;
1152
 
 
 
 
 
 
 
 
 
 
 
1153	node = g2d_get_cmdlist(g2d);
1154	if (!node)
1155		return -ENOMEM;
1156
1157	/*
1158	 * To avoid an integer overflow for the later size computations, we
1159	 * enforce a maximum number of submitted commands here. This limit is
1160	 * sufficient for all conceivable usage cases of the G2D.
1161	 */
1162	if (req->cmd_nr > G2D_CMDLIST_DATA_NUM ||
1163	    req->cmd_buf_nr > G2D_CMDLIST_DATA_NUM) {
1164		dev_err(g2d->dev, "number of submitted G2D commands exceeds limit\n");
1165		return -EINVAL;
1166	}
1167
1168	node->event = NULL;
1169
1170	if (req->event_type != G2D_EVENT_NOT) {
1171		e = kzalloc(sizeof(*node->event), GFP_KERNEL);
1172		if (!e) {
1173			ret = -ENOMEM;
1174			goto err;
1175		}
1176
1177		e->event.base.type = DRM_EXYNOS_G2D_EVENT;
1178		e->event.base.length = sizeof(e->event);
1179		e->event.user_data = req->user_data;
1180
1181		ret = drm_event_reserve_init(drm_dev, file, &e->base, &e->event.base);
1182		if (ret) {
1183			kfree(e);
1184			goto err;
1185		}
1186
1187		node->event = e;
1188	}
1189
1190	cmdlist = node->cmdlist;
1191
1192	cmdlist->last = 0;
1193
1194	/*
1195	 * If don't clear SFR registers, the cmdlist is affected by register
1196	 * values of previous cmdlist. G2D hw executes SFR clear command and
1197	 * a next command at the same time then the next command is ignored and
1198	 * is executed rightly from next next command, so needs a dummy command
1199	 * to next command of SFR clear command.
1200	 */
1201	cmdlist->data[cmdlist->last++] = G2D_SOFT_RESET;
1202	cmdlist->data[cmdlist->last++] = G2D_SFRCLEAR;
1203	cmdlist->data[cmdlist->last++] = G2D_SRC_BASE_ADDR;
1204	cmdlist->data[cmdlist->last++] = 0;
1205
1206	/*
1207	 * 'LIST_HOLD' command should be set to the DMA_HOLD_CMD_REG
1208	 * and GCF bit should be set to INTEN register if user wants
1209	 * G2D interrupt event once current command list execution is
1210	 * finished.
1211	 * Otherwise only ACF bit should be set to INTEN register so
1212	 * that one interrupt is occurred after all command lists
1213	 * have been completed.
1214	 */
1215	if (node->event) {
1216		cmdlist->data[cmdlist->last++] = G2D_INTEN;
1217		cmdlist->data[cmdlist->last++] = G2D_INTEN_ACF | G2D_INTEN_GCF;
1218		cmdlist->data[cmdlist->last++] = G2D_DMA_HOLD_CMD;
1219		cmdlist->data[cmdlist->last++] = G2D_LIST_HOLD;
1220	} else {
1221		cmdlist->data[cmdlist->last++] = G2D_INTEN;
1222		cmdlist->data[cmdlist->last++] = G2D_INTEN_ACF;
1223	}
1224
1225	/*
1226	 * Check the size of cmdlist. The 2 that is added last comes from
1227	 * the implicit G2D_BITBLT_START that is appended once we have
1228	 * checked all the submitted commands.
1229	 */
1230	size = cmdlist->last + req->cmd_nr * 2 + req->cmd_buf_nr * 2 + 2;
1231	if (size > G2D_CMDLIST_DATA_NUM) {
1232		dev_err(g2d->dev, "cmdlist size is too big\n");
1233		ret = -EINVAL;
1234		goto err_free_event;
1235	}
1236
1237	cmd = (struct drm_exynos_g2d_cmd *)(unsigned long)req->cmd;
1238
1239	if (copy_from_user(cmdlist->data + cmdlist->last,
1240				(void __user *)cmd,
1241				sizeof(*cmd) * req->cmd_nr)) {
1242		ret = -EFAULT;
1243		goto err_free_event;
1244	}
1245	cmdlist->last += req->cmd_nr * 2;
1246
1247	ret = g2d_check_reg_offset(g2d, node, req->cmd_nr, false);
1248	if (ret < 0)
1249		goto err_free_event;
1250
1251	node->buf_info.map_nr = req->cmd_buf_nr;
1252	if (req->cmd_buf_nr) {
1253		struct drm_exynos_g2d_cmd *cmd_buf;
1254
1255		cmd_buf = (struct drm_exynos_g2d_cmd *)
1256				(unsigned long)req->cmd_buf;
1257
1258		if (copy_from_user(cmdlist->data + cmdlist->last,
1259					(void __user *)cmd_buf,
1260					sizeof(*cmd_buf) * req->cmd_buf_nr)) {
1261			ret = -EFAULT;
1262			goto err_free_event;
1263		}
1264		cmdlist->last += req->cmd_buf_nr * 2;
1265
1266		ret = g2d_check_reg_offset(g2d, node, req->cmd_buf_nr, true);
1267		if (ret < 0)
1268			goto err_free_event;
1269
1270		ret = g2d_map_cmdlist_gem(g2d, node, drm_dev, file);
1271		if (ret < 0)
1272			goto err_unmap;
1273	}
1274
1275	cmdlist->data[cmdlist->last++] = G2D_BITBLT_START;
1276	cmdlist->data[cmdlist->last++] = G2D_START_BITBLT;
1277
1278	/* head */
1279	cmdlist->head = cmdlist->last / 2;
1280
1281	/* tail */
1282	cmdlist->data[cmdlist->last] = 0;
1283
1284	g2d_add_cmdlist_to_inuse(file_priv, node);
1285
1286	return 0;
1287
1288err_unmap:
1289	g2d_unmap_cmdlist_gem(g2d, node, file);
1290err_free_event:
1291	if (node->event)
1292		drm_event_cancel_free(drm_dev, &node->event->base);
1293err:
1294	g2d_put_cmdlist(g2d, node);
1295	return ret;
1296}
1297
1298int exynos_g2d_exec_ioctl(struct drm_device *drm_dev, void *data,
1299			  struct drm_file *file)
1300{
1301	struct drm_exynos_file_private *file_priv = file->driver_priv;
1302	struct exynos_drm_private *priv = drm_dev->dev_private;
1303	struct g2d_data *g2d = dev_get_drvdata(priv->g2d_dev);
 
1304	struct drm_exynos_g2d_exec *req = data;
1305	struct g2d_runqueue_node *runqueue_node;
1306	struct list_head *run_cmdlist;
1307	struct list_head *event_list;
1308
 
 
 
 
 
 
 
 
 
 
 
1309	runqueue_node = kmem_cache_alloc(g2d->runqueue_slab, GFP_KERNEL);
1310	if (!runqueue_node)
 
1311		return -ENOMEM;
1312
1313	run_cmdlist = &runqueue_node->run_cmdlist;
1314	event_list = &runqueue_node->event_list;
1315	INIT_LIST_HEAD(run_cmdlist);
1316	INIT_LIST_HEAD(event_list);
1317	init_completion(&runqueue_node->complete);
1318	runqueue_node->async = req->async;
1319
1320	list_splice_init(&file_priv->inuse_cmdlist, run_cmdlist);
1321	list_splice_init(&file_priv->event_list, event_list);
1322
1323	if (list_empty(run_cmdlist)) {
1324		dev_err(g2d->dev, "there is no inuse cmdlist\n");
1325		kmem_cache_free(g2d->runqueue_slab, runqueue_node);
1326		return -EPERM;
1327	}
1328
1329	mutex_lock(&g2d->runqueue_mutex);
1330	runqueue_node->pid = current->pid;
1331	runqueue_node->filp = file;
1332	list_add_tail(&runqueue_node->list, &g2d->runqueue);
 
 
1333	mutex_unlock(&g2d->runqueue_mutex);
1334
1335	/* Let the runqueue know that there is work to do. */
1336	queue_work(g2d->g2d_workq, &g2d->runqueue_work);
1337
1338	if (runqueue_node->async)
1339		goto out;
1340
1341	wait_for_completion(&runqueue_node->complete);
1342	g2d_free_runqueue_node(g2d, runqueue_node);
1343
1344out:
1345	return 0;
1346}
1347
1348int g2d_open(struct drm_device *drm_dev, struct drm_file *file)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1349{
1350	struct drm_exynos_file_private *file_priv = file->driver_priv;
 
 
 
 
 
1351
1352	INIT_LIST_HEAD(&file_priv->inuse_cmdlist);
1353	INIT_LIST_HEAD(&file_priv->event_list);
1354	INIT_LIST_HEAD(&file_priv->userptr_list);
 
 
 
1355
1356	return 0;
1357}
1358
1359void g2d_close(struct drm_device *drm_dev, struct drm_file *file)
 
1360{
1361	struct drm_exynos_file_private *file_priv = file->driver_priv;
1362	struct exynos_drm_private *priv = drm_dev->dev_private;
1363	struct g2d_data *g2d;
1364	struct g2d_cmdlist_node *node, *n;
1365
1366	if (!priv->g2d_dev)
1367		return;
1368
1369	g2d = dev_get_drvdata(priv->g2d_dev);
 
 
1370
1371	/* Remove the runqueue nodes that belong to us. */
1372	mutex_lock(&g2d->runqueue_mutex);
1373	g2d_remove_runqueue_nodes(g2d, file);
1374	mutex_unlock(&g2d->runqueue_mutex);
1375
1376	/*
1377	 * Wait for the runqueue worker to finish its current node.
1378	 * After this the engine should no longer be accessing any
1379	 * memory belonging to us.
1380	 */
1381	g2d_wait_finish(g2d, file);
1382
1383	/*
1384	 * Even after the engine is idle, there might still be stale cmdlists
1385	 * (i.e. cmdlisst which we submitted but never executed) around, with
1386	 * their corresponding GEM/userptr buffers.
1387	 * Properly unmap these buffers here.
1388	 */
1389	mutex_lock(&g2d->cmdlist_mutex);
1390	list_for_each_entry_safe(node, n, &file_priv->inuse_cmdlist, list) {
 
 
 
 
 
 
 
1391		g2d_unmap_cmdlist_gem(g2d, node, file);
1392		list_move_tail(&node->list, &g2d->free_cmdlist);
1393	}
1394	mutex_unlock(&g2d->cmdlist_mutex);
1395
1396	/* release all g2d_userptr in pool. */
1397	g2d_userptr_free_all(g2d, file);
1398}
1399
1400static int g2d_bind(struct device *dev, struct device *master, void *data)
1401{
1402	struct g2d_data *g2d = dev_get_drvdata(dev);
1403	struct drm_device *drm_dev = data;
1404	struct exynos_drm_private *priv = drm_dev->dev_private;
1405	int ret;
1406
1407	g2d->drm_dev = drm_dev;
1408
1409	/* allocate dma-aware cmdlist buffer. */
1410	ret = g2d_init_cmdlist(g2d);
1411	if (ret < 0) {
1412		dev_err(dev, "cmdlist init failed\n");
1413		return ret;
1414	}
1415
1416	ret = exynos_drm_register_dma(drm_dev, dev, &g2d->dma_priv);
1417	if (ret < 0) {
1418		dev_err(dev, "failed to enable iommu.\n");
1419		g2d_fini_cmdlist(g2d);
1420		return ret;
1421	}
1422	priv->g2d_dev = dev;
1423
1424	dev_info(dev, "The Exynos G2D (ver %d.%d) successfully registered.\n",
1425			G2D_HW_MAJOR_VER, G2D_HW_MINOR_VER);
1426	return 0;
1427}
1428
1429static void g2d_unbind(struct device *dev, struct device *master, void *data)
1430{
1431	struct g2d_data *g2d = dev_get_drvdata(dev);
1432	struct drm_device *drm_dev = data;
1433	struct exynos_drm_private *priv = drm_dev->dev_private;
1434
1435	/* Suspend operation and wait for engine idle. */
1436	set_bit(G2D_BIT_SUSPEND_RUNQUEUE, &g2d->flags);
1437	g2d_wait_finish(g2d, NULL);
1438	priv->g2d_dev = NULL;
1439
1440	cancel_work_sync(&g2d->runqueue_work);
1441	exynos_drm_unregister_dma(g2d->drm_dev, dev, &g2d->dma_priv);
1442}
1443
1444static const struct component_ops g2d_component_ops = {
1445	.bind	= g2d_bind,
1446	.unbind = g2d_unbind,
1447};
1448
1449static int g2d_probe(struct platform_device *pdev)
1450{
1451	struct device *dev = &pdev->dev;
 
1452	struct g2d_data *g2d;
 
1453	int ret;
1454
1455	g2d = devm_kzalloc(dev, sizeof(*g2d), GFP_KERNEL);
1456	if (!g2d)
1457		return -ENOMEM;
1458
1459	g2d->runqueue_slab = kmem_cache_create("g2d_runqueue_slab",
1460			sizeof(struct g2d_runqueue_node), 0, 0, NULL);
1461	if (!g2d->runqueue_slab)
1462		return -ENOMEM;
1463
1464	g2d->dev = dev;
1465
1466	g2d->g2d_workq = create_singlethread_workqueue("g2d");
1467	if (!g2d->g2d_workq) {
1468		dev_err(dev, "failed to create workqueue\n");
1469		ret = -EINVAL;
1470		goto err_destroy_slab;
1471	}
1472
1473	INIT_WORK(&g2d->runqueue_work, g2d_runqueue_worker);
1474	INIT_LIST_HEAD(&g2d->free_cmdlist);
1475	INIT_LIST_HEAD(&g2d->runqueue);
1476
1477	mutex_init(&g2d->cmdlist_mutex);
1478	mutex_init(&g2d->runqueue_mutex);
1479
1480	g2d->gate_clk = devm_clk_get(dev, "fimg2d");
1481	if (IS_ERR(g2d->gate_clk)) {
1482		dev_err(dev, "failed to get gate clock\n");
1483		ret = PTR_ERR(g2d->gate_clk);
1484		goto err_destroy_workqueue;
1485	}
1486
1487	pm_runtime_use_autosuspend(dev);
1488	pm_runtime_set_autosuspend_delay(dev, 2000);
1489	pm_runtime_enable(dev);
1490	clear_bit(G2D_BIT_SUSPEND_RUNQUEUE, &g2d->flags);
1491	clear_bit(G2D_BIT_ENGINE_BUSY, &g2d->flags);
1492
1493	g2d->regs = devm_platform_ioremap_resource(pdev, 0);
 
 
1494	if (IS_ERR(g2d->regs)) {
1495		ret = PTR_ERR(g2d->regs);
1496		goto err_put_clk;
1497	}
1498
1499	g2d->irq = platform_get_irq(pdev, 0);
1500	if (g2d->irq < 0) {
 
1501		ret = g2d->irq;
1502		goto err_put_clk;
1503	}
1504
1505	ret = devm_request_irq(dev, g2d->irq, g2d_irq_handler, 0,
1506								"drm_g2d", g2d);
1507	if (ret < 0) {
1508		dev_err(dev, "irq request failed\n");
1509		goto err_put_clk;
1510	}
1511
1512	g2d->max_pool = MAX_POOL;
1513
1514	platform_set_drvdata(pdev, g2d);
1515
1516	ret = component_add(dev, &g2d_component_ops);
 
 
 
 
 
 
 
1517	if (ret < 0) {
1518		dev_err(dev, "failed to register drm g2d device\n");
1519		goto err_put_clk;
1520	}
1521
 
 
 
1522	return 0;
1523
1524err_put_clk:
1525	pm_runtime_disable(dev);
1526err_destroy_workqueue:
1527	destroy_workqueue(g2d->g2d_workq);
1528err_destroy_slab:
1529	kmem_cache_destroy(g2d->runqueue_slab);
1530	return ret;
1531}
1532
1533static int g2d_remove(struct platform_device *pdev)
1534{
1535	struct g2d_data *g2d = platform_get_drvdata(pdev);
1536
1537	component_del(&pdev->dev, &g2d_component_ops);
 
1538
1539	/* There should be no locking needed here. */
1540	g2d_remove_runqueue_nodes(g2d, NULL);
 
 
1541
1542	pm_runtime_dont_use_autosuspend(&pdev->dev);
1543	pm_runtime_disable(&pdev->dev);
1544
1545	g2d_fini_cmdlist(g2d);
1546	destroy_workqueue(g2d->g2d_workq);
1547	kmem_cache_destroy(g2d->runqueue_slab);
1548
1549	return 0;
1550}
1551
1552#ifdef CONFIG_PM_SLEEP
1553static int g2d_suspend(struct device *dev)
1554{
1555	struct g2d_data *g2d = dev_get_drvdata(dev);
1556
1557	/*
1558	 * Suspend the runqueue worker operation and wait until the G2D
1559	 * engine is idle.
1560	 */
1561	set_bit(G2D_BIT_SUSPEND_RUNQUEUE, &g2d->flags);
1562	g2d_wait_finish(g2d, NULL);
 
 
1563	flush_work(&g2d->runqueue_work);
1564
1565	return 0;
1566}
1567
1568static int g2d_resume(struct device *dev)
1569{
1570	struct g2d_data *g2d = dev_get_drvdata(dev);
1571
1572	clear_bit(G2D_BIT_SUSPEND_RUNQUEUE, &g2d->flags);
1573	queue_work(g2d->g2d_workq, &g2d->runqueue_work);
1574
1575	return 0;
1576}
1577#endif
1578
1579#ifdef CONFIG_PM
1580static int g2d_runtime_suspend(struct device *dev)
1581{
1582	struct g2d_data *g2d = dev_get_drvdata(dev);
1583
1584	clk_disable_unprepare(g2d->gate_clk);
1585
1586	return 0;
1587}
1588
1589static int g2d_runtime_resume(struct device *dev)
1590{
1591	struct g2d_data *g2d = dev_get_drvdata(dev);
1592	int ret;
1593
1594	ret = clk_prepare_enable(g2d->gate_clk);
1595	if (ret < 0)
1596		dev_warn(dev, "failed to enable clock.\n");
1597
1598	return ret;
1599}
1600#endif
1601
1602static const struct dev_pm_ops g2d_pm_ops = {
1603	SET_SYSTEM_SLEEP_PM_OPS(g2d_suspend, g2d_resume)
1604	SET_RUNTIME_PM_OPS(g2d_runtime_suspend, g2d_runtime_resume, NULL)
1605};
1606
1607static const struct of_device_id exynos_g2d_match[] = {
1608	{ .compatible = "samsung,exynos5250-g2d" },
1609	{ .compatible = "samsung,exynos4212-g2d" },
1610	{},
1611};
1612MODULE_DEVICE_TABLE(of, exynos_g2d_match);
1613
1614struct platform_driver g2d_driver = {
1615	.probe		= g2d_probe,
1616	.remove		= g2d_remove,
1617	.driver		= {
1618		.name	= "exynos-drm-g2d",
1619		.owner	= THIS_MODULE,
1620		.pm	= &g2d_pm_ops,
1621		.of_match_table = exynos_g2d_match,
1622	},
1623};