1618 lines
39 KiB
C
1618 lines
39 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2012 Samsung Electronics Co.Ltd
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* Authors: Joonyoung Shim <jy0922.shim@samsung.com>
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*/
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#include <linux/clk.h>
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#include <linux/component.h>
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#include <linux/delay.h>
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#include <linux/dma-mapping.h>
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#include <linux/err.h>
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#include <linux/interrupt.h>
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#include <linux/io.h>
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#include <linux/kernel.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/pm_runtime.h>
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#include <linux/slab.h>
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#include <linux/uaccess.h>
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#include <linux/workqueue.h>
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#include <drm/drm_file.h>
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#include <drm/exynos_drm.h>
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#include "exynos_drm_drv.h"
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#include "exynos_drm_g2d.h"
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#include "exynos_drm_gem.h"
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#define G2D_HW_MAJOR_VER 4
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#define G2D_HW_MINOR_VER 1
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/* vaild register range set from user: 0x0104 ~ 0x0880 */
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#define G2D_VALID_START 0x0104
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#define G2D_VALID_END 0x0880
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/* general registers */
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#define G2D_SOFT_RESET 0x0000
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#define G2D_INTEN 0x0004
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#define G2D_INTC_PEND 0x000C
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#define G2D_DMA_SFR_BASE_ADDR 0x0080
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#define G2D_DMA_COMMAND 0x0084
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#define G2D_DMA_STATUS 0x008C
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#define G2D_DMA_HOLD_CMD 0x0090
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/* command registers */
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#define G2D_BITBLT_START 0x0100
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/* registers for base address */
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#define G2D_SRC_BASE_ADDR 0x0304
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#define G2D_SRC_STRIDE 0x0308
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#define G2D_SRC_COLOR_MODE 0x030C
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#define G2D_SRC_LEFT_TOP 0x0310
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#define G2D_SRC_RIGHT_BOTTOM 0x0314
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#define G2D_SRC_PLANE2_BASE_ADDR 0x0318
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#define G2D_DST_BASE_ADDR 0x0404
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#define G2D_DST_STRIDE 0x0408
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#define G2D_DST_COLOR_MODE 0x040C
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#define G2D_DST_LEFT_TOP 0x0410
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#define G2D_DST_RIGHT_BOTTOM 0x0414
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#define G2D_DST_PLANE2_BASE_ADDR 0x0418
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#define G2D_PAT_BASE_ADDR 0x0500
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#define G2D_MSK_BASE_ADDR 0x0520
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/* G2D_SOFT_RESET */
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#define G2D_SFRCLEAR (1 << 1)
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#define G2D_R (1 << 0)
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/* G2D_INTEN */
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#define G2D_INTEN_ACF (1 << 3)
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#define G2D_INTEN_UCF (1 << 2)
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#define G2D_INTEN_GCF (1 << 1)
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#define G2D_INTEN_SCF (1 << 0)
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/* G2D_INTC_PEND */
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#define G2D_INTP_ACMD_FIN (1 << 3)
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#define G2D_INTP_UCMD_FIN (1 << 2)
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#define G2D_INTP_GCMD_FIN (1 << 1)
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#define G2D_INTP_SCMD_FIN (1 << 0)
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/* G2D_DMA_COMMAND */
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#define G2D_DMA_HALT (1 << 2)
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#define G2D_DMA_CONTINUE (1 << 1)
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#define G2D_DMA_START (1 << 0)
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/* G2D_DMA_STATUS */
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#define G2D_DMA_LIST_DONE_COUNT (0xFF << 17)
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#define G2D_DMA_BITBLT_DONE_COUNT (0xFFFF << 1)
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#define G2D_DMA_DONE (1 << 0)
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#define G2D_DMA_LIST_DONE_COUNT_OFFSET 17
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/* G2D_DMA_HOLD_CMD */
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#define G2D_USER_HOLD (1 << 2)
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#define G2D_LIST_HOLD (1 << 1)
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#define G2D_BITBLT_HOLD (1 << 0)
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/* G2D_BITBLT_START */
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#define G2D_START_CASESEL (1 << 2)
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#define G2D_START_NHOLT (1 << 1)
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#define G2D_START_BITBLT (1 << 0)
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/* buffer color format */
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#define G2D_FMT_XRGB8888 0
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#define G2D_FMT_ARGB8888 1
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#define G2D_FMT_RGB565 2
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#define G2D_FMT_XRGB1555 3
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#define G2D_FMT_ARGB1555 4
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#define G2D_FMT_XRGB4444 5
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#define G2D_FMT_ARGB4444 6
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#define G2D_FMT_PACKED_RGB888 7
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#define G2D_FMT_A8 11
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#define G2D_FMT_L8 12
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/* buffer valid length */
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#define G2D_LEN_MIN 1
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#define G2D_LEN_MAX 8000
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#define G2D_CMDLIST_SIZE (PAGE_SIZE / 4)
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#define G2D_CMDLIST_NUM 64
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#define G2D_CMDLIST_POOL_SIZE (G2D_CMDLIST_SIZE * G2D_CMDLIST_NUM)
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#define G2D_CMDLIST_DATA_NUM (G2D_CMDLIST_SIZE / sizeof(u32) - 2)
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/* maximum buffer pool size of userptr is 64MB as default */
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#define MAX_POOL (64 * 1024 * 1024)
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enum {
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BUF_TYPE_GEM = 1,
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BUF_TYPE_USERPTR,
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};
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enum g2d_reg_type {
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REG_TYPE_NONE = -1,
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REG_TYPE_SRC,
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REG_TYPE_SRC_PLANE2,
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REG_TYPE_DST,
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REG_TYPE_DST_PLANE2,
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REG_TYPE_PAT,
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REG_TYPE_MSK,
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MAX_REG_TYPE_NR
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};
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enum g2d_flag_bits {
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/*
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* If set, suspends the runqueue worker after the currently
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* processed node is finished.
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*/
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G2D_BIT_SUSPEND_RUNQUEUE,
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/*
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* If set, indicates that the engine is currently busy.
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*/
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G2D_BIT_ENGINE_BUSY,
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};
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/* cmdlist data structure */
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struct g2d_cmdlist {
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u32 head;
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unsigned long data[G2D_CMDLIST_DATA_NUM];
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u32 last; /* last data offset */
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};
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/*
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* A structure of buffer description
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*
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* @format: color format
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* @stride: buffer stride/pitch in bytes
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* @left_x: the x coordinates of left top corner
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* @top_y: the y coordinates of left top corner
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* @right_x: the x coordinates of right bottom corner
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* @bottom_y: the y coordinates of right bottom corner
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*
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*/
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struct g2d_buf_desc {
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unsigned int format;
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unsigned int stride;
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unsigned int left_x;
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unsigned int top_y;
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unsigned int right_x;
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unsigned int bottom_y;
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};
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/*
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* A structure of buffer information
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*
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* @map_nr: manages the number of mapped buffers
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* @reg_types: stores regitster type in the order of requested command
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* @handles: stores buffer handle in its reg_type position
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* @types: stores buffer type in its reg_type position
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* @descs: stores buffer description in its reg_type position
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*
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*/
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struct g2d_buf_info {
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unsigned int map_nr;
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enum g2d_reg_type reg_types[MAX_REG_TYPE_NR];
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void *obj[MAX_REG_TYPE_NR];
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unsigned int types[MAX_REG_TYPE_NR];
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struct g2d_buf_desc descs[MAX_REG_TYPE_NR];
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};
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struct drm_exynos_pending_g2d_event {
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struct drm_pending_event base;
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struct drm_exynos_g2d_event event;
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};
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struct g2d_cmdlist_userptr {
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struct list_head list;
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dma_addr_t dma_addr;
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unsigned long userptr;
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unsigned long size;
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struct page **pages;
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unsigned int npages;
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struct sg_table *sgt;
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atomic_t refcount;
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bool in_pool;
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bool out_of_list;
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};
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struct g2d_cmdlist_node {
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struct list_head list;
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struct g2d_cmdlist *cmdlist;
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dma_addr_t dma_addr;
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struct g2d_buf_info buf_info;
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struct drm_exynos_pending_g2d_event *event;
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};
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struct g2d_runqueue_node {
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struct list_head list;
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struct list_head run_cmdlist;
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struct list_head event_list;
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struct drm_file *filp;
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pid_t pid;
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struct completion complete;
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int async;
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};
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struct g2d_data {
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struct device *dev;
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void *dma_priv;
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struct clk *gate_clk;
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void __iomem *regs;
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int irq;
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struct workqueue_struct *g2d_workq;
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struct work_struct runqueue_work;
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struct drm_device *drm_dev;
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unsigned long flags;
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/* cmdlist */
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struct g2d_cmdlist_node *cmdlist_node;
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struct list_head free_cmdlist;
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struct mutex cmdlist_mutex;
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dma_addr_t cmdlist_pool;
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void *cmdlist_pool_virt;
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unsigned long cmdlist_dma_attrs;
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/* runqueue*/
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struct g2d_runqueue_node *runqueue_node;
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struct list_head runqueue;
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struct mutex runqueue_mutex;
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struct kmem_cache *runqueue_slab;
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unsigned long current_pool;
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unsigned long max_pool;
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};
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static inline void g2d_hw_reset(struct g2d_data *g2d)
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{
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writel(G2D_R | G2D_SFRCLEAR, g2d->regs + G2D_SOFT_RESET);
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clear_bit(G2D_BIT_ENGINE_BUSY, &g2d->flags);
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}
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static int g2d_init_cmdlist(struct g2d_data *g2d)
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{
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struct device *dev = g2d->dev;
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struct g2d_cmdlist_node *node;
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int nr;
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int ret;
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struct g2d_buf_info *buf_info;
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g2d->cmdlist_dma_attrs = DMA_ATTR_WRITE_COMBINE;
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g2d->cmdlist_pool_virt = dma_alloc_attrs(to_dma_dev(g2d->drm_dev),
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G2D_CMDLIST_POOL_SIZE,
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&g2d->cmdlist_pool, GFP_KERNEL,
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g2d->cmdlist_dma_attrs);
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if (!g2d->cmdlist_pool_virt) {
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dev_err(dev, "failed to allocate dma memory\n");
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return -ENOMEM;
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}
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node = kcalloc(G2D_CMDLIST_NUM, sizeof(*node), GFP_KERNEL);
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if (!node) {
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ret = -ENOMEM;
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goto err;
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}
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for (nr = 0; nr < G2D_CMDLIST_NUM; nr++) {
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unsigned int i;
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node[nr].cmdlist =
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g2d->cmdlist_pool_virt + nr * G2D_CMDLIST_SIZE;
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node[nr].dma_addr =
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g2d->cmdlist_pool + nr * G2D_CMDLIST_SIZE;
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buf_info = &node[nr].buf_info;
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for (i = 0; i < MAX_REG_TYPE_NR; i++)
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buf_info->reg_types[i] = REG_TYPE_NONE;
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list_add_tail(&node[nr].list, &g2d->free_cmdlist);
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}
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return 0;
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err:
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dma_free_attrs(to_dma_dev(g2d->drm_dev), G2D_CMDLIST_POOL_SIZE,
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g2d->cmdlist_pool_virt,
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g2d->cmdlist_pool, g2d->cmdlist_dma_attrs);
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return ret;
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}
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static void g2d_fini_cmdlist(struct g2d_data *g2d)
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{
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kfree(g2d->cmdlist_node);
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if (g2d->cmdlist_pool_virt && g2d->cmdlist_pool) {
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dma_free_attrs(to_dma_dev(g2d->drm_dev),
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G2D_CMDLIST_POOL_SIZE,
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g2d->cmdlist_pool_virt,
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g2d->cmdlist_pool, g2d->cmdlist_dma_attrs);
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}
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}
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static struct g2d_cmdlist_node *g2d_get_cmdlist(struct g2d_data *g2d)
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{
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struct device *dev = g2d->dev;
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struct g2d_cmdlist_node *node;
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mutex_lock(&g2d->cmdlist_mutex);
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if (list_empty(&g2d->free_cmdlist)) {
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dev_err(dev, "there is no free cmdlist\n");
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mutex_unlock(&g2d->cmdlist_mutex);
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return NULL;
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}
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node = list_first_entry(&g2d->free_cmdlist, struct g2d_cmdlist_node,
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list);
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list_del_init(&node->list);
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mutex_unlock(&g2d->cmdlist_mutex);
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return node;
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}
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static void g2d_put_cmdlist(struct g2d_data *g2d, struct g2d_cmdlist_node *node)
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{
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mutex_lock(&g2d->cmdlist_mutex);
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list_move_tail(&node->list, &g2d->free_cmdlist);
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mutex_unlock(&g2d->cmdlist_mutex);
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}
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static void g2d_add_cmdlist_to_inuse(struct drm_exynos_file_private *file_priv,
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struct g2d_cmdlist_node *node)
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{
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struct g2d_cmdlist_node *lnode;
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if (list_empty(&file_priv->inuse_cmdlist))
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goto add_to_list;
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/* this links to base address of new cmdlist */
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lnode = list_entry(file_priv->inuse_cmdlist.prev,
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struct g2d_cmdlist_node, list);
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lnode->cmdlist->data[lnode->cmdlist->last] = node->dma_addr;
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add_to_list:
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list_add_tail(&node->list, &file_priv->inuse_cmdlist);
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if (node->event)
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list_add_tail(&node->event->base.link, &file_priv->event_list);
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}
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static void g2d_userptr_put_dma_addr(struct g2d_data *g2d,
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void *obj,
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bool force)
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{
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struct g2d_cmdlist_userptr *g2d_userptr = obj;
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if (!obj)
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return;
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if (force)
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goto out;
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atomic_dec(&g2d_userptr->refcount);
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if (atomic_read(&g2d_userptr->refcount) > 0)
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return;
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if (g2d_userptr->in_pool)
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return;
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out:
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dma_unmap_sgtable(to_dma_dev(g2d->drm_dev), g2d_userptr->sgt,
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DMA_BIDIRECTIONAL, 0);
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unpin_user_pages_dirty_lock(g2d_userptr->pages, g2d_userptr->npages,
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true);
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kvfree(g2d_userptr->pages);
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if (!g2d_userptr->out_of_list)
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list_del_init(&g2d_userptr->list);
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sg_free_table(g2d_userptr->sgt);
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kfree(g2d_userptr->sgt);
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kfree(g2d_userptr);
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}
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static dma_addr_t *g2d_userptr_get_dma_addr(struct g2d_data *g2d,
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unsigned long userptr,
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unsigned long size,
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struct drm_file *filp,
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void **obj)
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{
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struct drm_exynos_file_private *file_priv = filp->driver_priv;
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struct g2d_cmdlist_userptr *g2d_userptr;
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struct sg_table *sgt;
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unsigned long start, end;
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unsigned int npages, offset;
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int ret;
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if (!size) {
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DRM_DEV_ERROR(g2d->dev, "invalid userptr size.\n");
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return ERR_PTR(-EINVAL);
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}
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/* check if userptr already exists in userptr_list. */
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list_for_each_entry(g2d_userptr, &file_priv->userptr_list, list) {
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if (g2d_userptr->userptr == userptr) {
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/*
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* also check size because there could be same address
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* and different size.
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*/
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if (g2d_userptr->size == size) {
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atomic_inc(&g2d_userptr->refcount);
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*obj = g2d_userptr;
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return &g2d_userptr->dma_addr;
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}
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/*
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* at this moment, maybe g2d dma is accessing this
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* g2d_userptr memory region so just remove this
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* g2d_userptr object from userptr_list not to be
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* referred again and also except it the userptr
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* pool to be released after the dma access completion.
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*/
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g2d_userptr->out_of_list = true;
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g2d_userptr->in_pool = false;
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list_del_init(&g2d_userptr->list);
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break;
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}
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}
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g2d_userptr = kzalloc(sizeof(*g2d_userptr), GFP_KERNEL);
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if (!g2d_userptr)
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return ERR_PTR(-ENOMEM);
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atomic_set(&g2d_userptr->refcount, 1);
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g2d_userptr->size = size;
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start = userptr & PAGE_MASK;
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offset = userptr & ~PAGE_MASK;
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end = PAGE_ALIGN(userptr + size);
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npages = (end - start) >> PAGE_SHIFT;
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g2d_userptr->pages = kvmalloc_array(npages, sizeof(*g2d_userptr->pages),
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GFP_KERNEL);
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if (!g2d_userptr->pages) {
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ret = -ENOMEM;
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goto err_free;
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}
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ret = pin_user_pages_fast(start, npages,
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FOLL_FORCE | FOLL_WRITE | FOLL_LONGTERM,
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g2d_userptr->pages);
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if (ret != npages) {
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DRM_DEV_ERROR(g2d->dev,
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"failed to get user pages from userptr.\n");
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if (ret < 0)
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goto err_destroy_pages;
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npages = ret;
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ret = -EFAULT;
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goto err_unpin_pages;
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}
|
|
g2d_userptr->npages = npages;
|
|
|
|
sgt = kzalloc(sizeof(*sgt), GFP_KERNEL);
|
|
if (!sgt) {
|
|
ret = -ENOMEM;
|
|
goto err_unpin_pages;
|
|
}
|
|
|
|
ret = sg_alloc_table_from_pages(sgt,
|
|
g2d_userptr->pages,
|
|
npages, offset, size, GFP_KERNEL);
|
|
if (ret < 0) {
|
|
DRM_DEV_ERROR(g2d->dev, "failed to get sgt from pages.\n");
|
|
goto err_free_sgt;
|
|
}
|
|
|
|
g2d_userptr->sgt = sgt;
|
|
|
|
ret = dma_map_sgtable(to_dma_dev(g2d->drm_dev), sgt,
|
|
DMA_BIDIRECTIONAL, 0);
|
|
if (ret) {
|
|
DRM_DEV_ERROR(g2d->dev, "failed to map sgt with dma region.\n");
|
|
goto err_sg_free_table;
|
|
}
|
|
|
|
g2d_userptr->dma_addr = sgt->sgl[0].dma_address;
|
|
g2d_userptr->userptr = userptr;
|
|
|
|
list_add_tail(&g2d_userptr->list, &file_priv->userptr_list);
|
|
|
|
if (g2d->current_pool + (npages << PAGE_SHIFT) < g2d->max_pool) {
|
|
g2d->current_pool += npages << PAGE_SHIFT;
|
|
g2d_userptr->in_pool = true;
|
|
}
|
|
|
|
*obj = g2d_userptr;
|
|
|
|
return &g2d_userptr->dma_addr;
|
|
|
|
err_sg_free_table:
|
|
sg_free_table(sgt);
|
|
|
|
err_free_sgt:
|
|
kfree(sgt);
|
|
|
|
err_unpin_pages:
|
|
unpin_user_pages(g2d_userptr->pages, npages);
|
|
|
|
err_destroy_pages:
|
|
kvfree(g2d_userptr->pages);
|
|
|
|
err_free:
|
|
kfree(g2d_userptr);
|
|
|
|
return ERR_PTR(ret);
|
|
}
|
|
|
|
static void g2d_userptr_free_all(struct g2d_data *g2d, struct drm_file *filp)
|
|
{
|
|
struct drm_exynos_file_private *file_priv = filp->driver_priv;
|
|
struct g2d_cmdlist_userptr *g2d_userptr, *n;
|
|
|
|
list_for_each_entry_safe(g2d_userptr, n, &file_priv->userptr_list, list)
|
|
if (g2d_userptr->in_pool)
|
|
g2d_userptr_put_dma_addr(g2d, g2d_userptr, true);
|
|
|
|
g2d->current_pool = 0;
|
|
}
|
|
|
|
static enum g2d_reg_type g2d_get_reg_type(struct g2d_data *g2d, int reg_offset)
|
|
{
|
|
enum g2d_reg_type reg_type;
|
|
|
|
switch (reg_offset) {
|
|
case G2D_SRC_BASE_ADDR:
|
|
case G2D_SRC_STRIDE:
|
|
case G2D_SRC_COLOR_MODE:
|
|
case G2D_SRC_LEFT_TOP:
|
|
case G2D_SRC_RIGHT_BOTTOM:
|
|
reg_type = REG_TYPE_SRC;
|
|
break;
|
|
case G2D_SRC_PLANE2_BASE_ADDR:
|
|
reg_type = REG_TYPE_SRC_PLANE2;
|
|
break;
|
|
case G2D_DST_BASE_ADDR:
|
|
case G2D_DST_STRIDE:
|
|
case G2D_DST_COLOR_MODE:
|
|
case G2D_DST_LEFT_TOP:
|
|
case G2D_DST_RIGHT_BOTTOM:
|
|
reg_type = REG_TYPE_DST;
|
|
break;
|
|
case G2D_DST_PLANE2_BASE_ADDR:
|
|
reg_type = REG_TYPE_DST_PLANE2;
|
|
break;
|
|
case G2D_PAT_BASE_ADDR:
|
|
reg_type = REG_TYPE_PAT;
|
|
break;
|
|
case G2D_MSK_BASE_ADDR:
|
|
reg_type = REG_TYPE_MSK;
|
|
break;
|
|
default:
|
|
reg_type = REG_TYPE_NONE;
|
|
DRM_DEV_ERROR(g2d->dev, "Unknown register offset![%d]\n",
|
|
reg_offset);
|
|
break;
|
|
}
|
|
|
|
return reg_type;
|
|
}
|
|
|
|
static unsigned long g2d_get_buf_bpp(unsigned int format)
|
|
{
|
|
unsigned long bpp;
|
|
|
|
switch (format) {
|
|
case G2D_FMT_XRGB8888:
|
|
case G2D_FMT_ARGB8888:
|
|
bpp = 4;
|
|
break;
|
|
case G2D_FMT_RGB565:
|
|
case G2D_FMT_XRGB1555:
|
|
case G2D_FMT_ARGB1555:
|
|
case G2D_FMT_XRGB4444:
|
|
case G2D_FMT_ARGB4444:
|
|
bpp = 2;
|
|
break;
|
|
case G2D_FMT_PACKED_RGB888:
|
|
bpp = 3;
|
|
break;
|
|
default:
|
|
bpp = 1;
|
|
break;
|
|
}
|
|
|
|
return bpp;
|
|
}
|
|
|
|
static bool g2d_check_buf_desc_is_valid(struct g2d_data *g2d,
|
|
struct g2d_buf_desc *buf_desc,
|
|
enum g2d_reg_type reg_type,
|
|
unsigned long size)
|
|
{
|
|
int width, height;
|
|
unsigned long bpp, last_pos;
|
|
|
|
/*
|
|
* check source and destination buffers only.
|
|
* so the others are always valid.
|
|
*/
|
|
if (reg_type != REG_TYPE_SRC && reg_type != REG_TYPE_DST)
|
|
return true;
|
|
|
|
/* This check also makes sure that right_x > left_x. */
|
|
width = (int)buf_desc->right_x - (int)buf_desc->left_x;
|
|
if (width < G2D_LEN_MIN || width > G2D_LEN_MAX) {
|
|
DRM_DEV_ERROR(g2d->dev, "width[%d] is out of range!\n", width);
|
|
return false;
|
|
}
|
|
|
|
/* This check also makes sure that bottom_y > top_y. */
|
|
height = (int)buf_desc->bottom_y - (int)buf_desc->top_y;
|
|
if (height < G2D_LEN_MIN || height > G2D_LEN_MAX) {
|
|
DRM_DEV_ERROR(g2d->dev,
|
|
"height[%d] is out of range!\n", height);
|
|
return false;
|
|
}
|
|
|
|
bpp = g2d_get_buf_bpp(buf_desc->format);
|
|
|
|
/* Compute the position of the last byte that the engine accesses. */
|
|
last_pos = ((unsigned long)buf_desc->bottom_y - 1) *
|
|
(unsigned long)buf_desc->stride +
|
|
(unsigned long)buf_desc->right_x * bpp - 1;
|
|
|
|
/*
|
|
* Since right_x > left_x and bottom_y > top_y we already know
|
|
* that the first_pos < last_pos (first_pos being the position
|
|
* of the first byte the engine accesses), it just remains to
|
|
* check if last_pos is smaller then the buffer size.
|
|
*/
|
|
|
|
if (last_pos >= size) {
|
|
DRM_DEV_ERROR(g2d->dev, "last engine access position [%lu] "
|
|
"is out of range [%lu]!\n", last_pos, size);
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
static int g2d_map_cmdlist_gem(struct g2d_data *g2d,
|
|
struct g2d_cmdlist_node *node,
|
|
struct drm_device *drm_dev,
|
|
struct drm_file *file)
|
|
{
|
|
struct g2d_cmdlist *cmdlist = node->cmdlist;
|
|
struct g2d_buf_info *buf_info = &node->buf_info;
|
|
int offset;
|
|
int ret;
|
|
int i;
|
|
|
|
for (i = 0; i < buf_info->map_nr; i++) {
|
|
struct g2d_buf_desc *buf_desc;
|
|
enum g2d_reg_type reg_type;
|
|
int reg_pos;
|
|
unsigned long handle;
|
|
dma_addr_t *addr;
|
|
|
|
reg_pos = cmdlist->last - 2 * (i + 1);
|
|
|
|
offset = cmdlist->data[reg_pos];
|
|
handle = cmdlist->data[reg_pos + 1];
|
|
|
|
reg_type = g2d_get_reg_type(g2d, offset);
|
|
if (reg_type == REG_TYPE_NONE) {
|
|
ret = -EFAULT;
|
|
goto err;
|
|
}
|
|
|
|
buf_desc = &buf_info->descs[reg_type];
|
|
|
|
if (buf_info->types[reg_type] == BUF_TYPE_GEM) {
|
|
struct exynos_drm_gem *exynos_gem;
|
|
|
|
exynos_gem = exynos_drm_gem_get(file, handle);
|
|
if (!exynos_gem) {
|
|
ret = -EFAULT;
|
|
goto err;
|
|
}
|
|
|
|
if (!g2d_check_buf_desc_is_valid(g2d, buf_desc,
|
|
reg_type, exynos_gem->size)) {
|
|
exynos_drm_gem_put(exynos_gem);
|
|
ret = -EFAULT;
|
|
goto err;
|
|
}
|
|
|
|
addr = &exynos_gem->dma_addr;
|
|
buf_info->obj[reg_type] = exynos_gem;
|
|
} else {
|
|
struct drm_exynos_g2d_userptr g2d_userptr;
|
|
|
|
if (copy_from_user(&g2d_userptr, (void __user *)handle,
|
|
sizeof(struct drm_exynos_g2d_userptr))) {
|
|
ret = -EFAULT;
|
|
goto err;
|
|
}
|
|
|
|
if (!g2d_check_buf_desc_is_valid(g2d, buf_desc,
|
|
reg_type,
|
|
g2d_userptr.size)) {
|
|
ret = -EFAULT;
|
|
goto err;
|
|
}
|
|
|
|
addr = g2d_userptr_get_dma_addr(g2d,
|
|
g2d_userptr.userptr,
|
|
g2d_userptr.size,
|
|
file,
|
|
&buf_info->obj[reg_type]);
|
|
if (IS_ERR(addr)) {
|
|
ret = -EFAULT;
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
cmdlist->data[reg_pos + 1] = *addr;
|
|
buf_info->reg_types[i] = reg_type;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err:
|
|
buf_info->map_nr = i;
|
|
return ret;
|
|
}
|
|
|
|
static void g2d_unmap_cmdlist_gem(struct g2d_data *g2d,
|
|
struct g2d_cmdlist_node *node,
|
|
struct drm_file *filp)
|
|
{
|
|
struct g2d_buf_info *buf_info = &node->buf_info;
|
|
int i;
|
|
|
|
for (i = 0; i < buf_info->map_nr; i++) {
|
|
struct g2d_buf_desc *buf_desc;
|
|
enum g2d_reg_type reg_type;
|
|
void *obj;
|
|
|
|
reg_type = buf_info->reg_types[i];
|
|
|
|
buf_desc = &buf_info->descs[reg_type];
|
|
obj = buf_info->obj[reg_type];
|
|
|
|
if (buf_info->types[reg_type] == BUF_TYPE_GEM)
|
|
exynos_drm_gem_put(obj);
|
|
else
|
|
g2d_userptr_put_dma_addr(g2d, obj, false);
|
|
|
|
buf_info->reg_types[i] = REG_TYPE_NONE;
|
|
buf_info->obj[reg_type] = NULL;
|
|
buf_info->types[reg_type] = 0;
|
|
memset(buf_desc, 0x00, sizeof(*buf_desc));
|
|
}
|
|
|
|
buf_info->map_nr = 0;
|
|
}
|
|
|
|
static void g2d_dma_start(struct g2d_data *g2d,
|
|
struct g2d_runqueue_node *runqueue_node)
|
|
{
|
|
struct g2d_cmdlist_node *node =
|
|
list_first_entry(&runqueue_node->run_cmdlist,
|
|
struct g2d_cmdlist_node, list);
|
|
|
|
set_bit(G2D_BIT_ENGINE_BUSY, &g2d->flags);
|
|
writel_relaxed(node->dma_addr, g2d->regs + G2D_DMA_SFR_BASE_ADDR);
|
|
writel_relaxed(G2D_DMA_START, g2d->regs + G2D_DMA_COMMAND);
|
|
}
|
|
|
|
static struct g2d_runqueue_node *g2d_get_runqueue_node(struct g2d_data *g2d)
|
|
{
|
|
struct g2d_runqueue_node *runqueue_node;
|
|
|
|
if (list_empty(&g2d->runqueue))
|
|
return NULL;
|
|
|
|
runqueue_node = list_first_entry(&g2d->runqueue,
|
|
struct g2d_runqueue_node, list);
|
|
list_del_init(&runqueue_node->list);
|
|
return runqueue_node;
|
|
}
|
|
|
|
static void g2d_free_runqueue_node(struct g2d_data *g2d,
|
|
struct g2d_runqueue_node *runqueue_node)
|
|
{
|
|
struct g2d_cmdlist_node *node;
|
|
|
|
mutex_lock(&g2d->cmdlist_mutex);
|
|
/*
|
|
* commands in run_cmdlist have been completed so unmap all gem
|
|
* objects in each command node so that they are unreferenced.
|
|
*/
|
|
list_for_each_entry(node, &runqueue_node->run_cmdlist, list)
|
|
g2d_unmap_cmdlist_gem(g2d, node, runqueue_node->filp);
|
|
list_splice_tail_init(&runqueue_node->run_cmdlist, &g2d->free_cmdlist);
|
|
mutex_unlock(&g2d->cmdlist_mutex);
|
|
|
|
kmem_cache_free(g2d->runqueue_slab, runqueue_node);
|
|
}
|
|
|
|
/**
|
|
* g2d_remove_runqueue_nodes - remove items from the list of runqueue nodes
|
|
* @g2d: G2D state object
|
|
* @file: if not zero, only remove items with this DRM file
|
|
*
|
|
* Has to be called under runqueue lock.
|
|
*/
|
|
static void g2d_remove_runqueue_nodes(struct g2d_data *g2d, struct drm_file *file)
|
|
{
|
|
struct g2d_runqueue_node *node, *n;
|
|
|
|
if (list_empty(&g2d->runqueue))
|
|
return;
|
|
|
|
list_for_each_entry_safe(node, n, &g2d->runqueue, list) {
|
|
if (file && node->filp != file)
|
|
continue;
|
|
|
|
list_del_init(&node->list);
|
|
g2d_free_runqueue_node(g2d, node);
|
|
}
|
|
}
|
|
|
|
static void g2d_runqueue_worker(struct work_struct *work)
|
|
{
|
|
struct g2d_data *g2d = container_of(work, struct g2d_data,
|
|
runqueue_work);
|
|
struct g2d_runqueue_node *runqueue_node;
|
|
|
|
/*
|
|
* The engine is busy and the completion of the current node is going
|
|
* to poke the runqueue worker, so nothing to do here.
|
|
*/
|
|
if (test_bit(G2D_BIT_ENGINE_BUSY, &g2d->flags))
|
|
return;
|
|
|
|
mutex_lock(&g2d->runqueue_mutex);
|
|
|
|
runqueue_node = g2d->runqueue_node;
|
|
g2d->runqueue_node = NULL;
|
|
|
|
if (runqueue_node) {
|
|
pm_runtime_mark_last_busy(g2d->dev);
|
|
pm_runtime_put_autosuspend(g2d->dev);
|
|
|
|
complete(&runqueue_node->complete);
|
|
if (runqueue_node->async)
|
|
g2d_free_runqueue_node(g2d, runqueue_node);
|
|
}
|
|
|
|
if (!test_bit(G2D_BIT_SUSPEND_RUNQUEUE, &g2d->flags)) {
|
|
g2d->runqueue_node = g2d_get_runqueue_node(g2d);
|
|
|
|
if (g2d->runqueue_node) {
|
|
pm_runtime_get_sync(g2d->dev);
|
|
g2d_dma_start(g2d, g2d->runqueue_node);
|
|
}
|
|
}
|
|
|
|
mutex_unlock(&g2d->runqueue_mutex);
|
|
}
|
|
|
|
static void g2d_finish_event(struct g2d_data *g2d, u32 cmdlist_no)
|
|
{
|
|
struct drm_device *drm_dev = g2d->drm_dev;
|
|
struct g2d_runqueue_node *runqueue_node = g2d->runqueue_node;
|
|
struct drm_exynos_pending_g2d_event *e;
|
|
struct timespec64 now;
|
|
|
|
if (list_empty(&runqueue_node->event_list))
|
|
return;
|
|
|
|
e = list_first_entry(&runqueue_node->event_list,
|
|
struct drm_exynos_pending_g2d_event, base.link);
|
|
|
|
ktime_get_ts64(&now);
|
|
e->event.tv_sec = now.tv_sec;
|
|
e->event.tv_usec = now.tv_nsec / NSEC_PER_USEC;
|
|
e->event.cmdlist_no = cmdlist_no;
|
|
|
|
drm_send_event(drm_dev, &e->base);
|
|
}
|
|
|
|
static irqreturn_t g2d_irq_handler(int irq, void *dev_id)
|
|
{
|
|
struct g2d_data *g2d = dev_id;
|
|
u32 pending;
|
|
|
|
pending = readl_relaxed(g2d->regs + G2D_INTC_PEND);
|
|
if (pending)
|
|
writel_relaxed(pending, g2d->regs + G2D_INTC_PEND);
|
|
|
|
if (pending & G2D_INTP_GCMD_FIN) {
|
|
u32 cmdlist_no = readl_relaxed(g2d->regs + G2D_DMA_STATUS);
|
|
|
|
cmdlist_no = (cmdlist_no & G2D_DMA_LIST_DONE_COUNT) >>
|
|
G2D_DMA_LIST_DONE_COUNT_OFFSET;
|
|
|
|
g2d_finish_event(g2d, cmdlist_no);
|
|
|
|
writel_relaxed(0, g2d->regs + G2D_DMA_HOLD_CMD);
|
|
if (!(pending & G2D_INTP_ACMD_FIN)) {
|
|
writel_relaxed(G2D_DMA_CONTINUE,
|
|
g2d->regs + G2D_DMA_COMMAND);
|
|
}
|
|
}
|
|
|
|
if (pending & G2D_INTP_ACMD_FIN) {
|
|
clear_bit(G2D_BIT_ENGINE_BUSY, &g2d->flags);
|
|
queue_work(g2d->g2d_workq, &g2d->runqueue_work);
|
|
}
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/**
|
|
* g2d_wait_finish - wait for the G2D engine to finish the current runqueue node
|
|
* @g2d: G2D state object
|
|
* @file: if not zero, only wait if the current runqueue node belongs
|
|
* to the DRM file
|
|
*
|
|
* Should the engine not become idle after a 100ms timeout, a hardware
|
|
* reset is issued.
|
|
*/
|
|
static void g2d_wait_finish(struct g2d_data *g2d, struct drm_file *file)
|
|
{
|
|
struct device *dev = g2d->dev;
|
|
|
|
struct g2d_runqueue_node *runqueue_node = NULL;
|
|
unsigned int tries = 10;
|
|
|
|
mutex_lock(&g2d->runqueue_mutex);
|
|
|
|
/* If no node is currently processed, we have nothing to do. */
|
|
if (!g2d->runqueue_node)
|
|
goto out;
|
|
|
|
runqueue_node = g2d->runqueue_node;
|
|
|
|
/* Check if the currently processed item belongs to us. */
|
|
if (file && runqueue_node->filp != file)
|
|
goto out;
|
|
|
|
mutex_unlock(&g2d->runqueue_mutex);
|
|
|
|
/* Wait for the G2D engine to finish. */
|
|
while (tries-- && (g2d->runqueue_node == runqueue_node))
|
|
mdelay(10);
|
|
|
|
mutex_lock(&g2d->runqueue_mutex);
|
|
|
|
if (g2d->runqueue_node != runqueue_node)
|
|
goto out;
|
|
|
|
dev_err(dev, "wait timed out, resetting engine...\n");
|
|
g2d_hw_reset(g2d);
|
|
|
|
/*
|
|
* After the hardware reset of the engine we are going to loose
|
|
* the IRQ which triggers the PM runtime put().
|
|
* So do this manually here.
|
|
*/
|
|
pm_runtime_mark_last_busy(dev);
|
|
pm_runtime_put_autosuspend(dev);
|
|
|
|
complete(&runqueue_node->complete);
|
|
if (runqueue_node->async)
|
|
g2d_free_runqueue_node(g2d, runqueue_node);
|
|
|
|
out:
|
|
mutex_unlock(&g2d->runqueue_mutex);
|
|
}
|
|
|
|
static int g2d_check_reg_offset(struct g2d_data *g2d,
|
|
struct g2d_cmdlist_node *node,
|
|
int nr, bool for_addr)
|
|
{
|
|
struct g2d_cmdlist *cmdlist = node->cmdlist;
|
|
int reg_offset;
|
|
int index;
|
|
int i;
|
|
|
|
for (i = 0; i < nr; i++) {
|
|
struct g2d_buf_info *buf_info = &node->buf_info;
|
|
struct g2d_buf_desc *buf_desc;
|
|
enum g2d_reg_type reg_type;
|
|
unsigned long value;
|
|
|
|
index = cmdlist->last - 2 * (i + 1);
|
|
|
|
reg_offset = cmdlist->data[index] & ~0xfffff000;
|
|
if (reg_offset < G2D_VALID_START || reg_offset > G2D_VALID_END)
|
|
goto err;
|
|
if (reg_offset % 4)
|
|
goto err;
|
|
|
|
switch (reg_offset) {
|
|
case G2D_SRC_BASE_ADDR:
|
|
case G2D_SRC_PLANE2_BASE_ADDR:
|
|
case G2D_DST_BASE_ADDR:
|
|
case G2D_DST_PLANE2_BASE_ADDR:
|
|
case G2D_PAT_BASE_ADDR:
|
|
case G2D_MSK_BASE_ADDR:
|
|
if (!for_addr)
|
|
goto err;
|
|
|
|
reg_type = g2d_get_reg_type(g2d, reg_offset);
|
|
|
|
/* check userptr buffer type. */
|
|
if ((cmdlist->data[index] & ~0x7fffffff) >> 31) {
|
|
buf_info->types[reg_type] = BUF_TYPE_USERPTR;
|
|
cmdlist->data[index] &= ~G2D_BUF_USERPTR;
|
|
} else
|
|
buf_info->types[reg_type] = BUF_TYPE_GEM;
|
|
break;
|
|
case G2D_SRC_STRIDE:
|
|
case G2D_DST_STRIDE:
|
|
if (for_addr)
|
|
goto err;
|
|
|
|
reg_type = g2d_get_reg_type(g2d, reg_offset);
|
|
|
|
buf_desc = &buf_info->descs[reg_type];
|
|
buf_desc->stride = cmdlist->data[index + 1];
|
|
break;
|
|
case G2D_SRC_COLOR_MODE:
|
|
case G2D_DST_COLOR_MODE:
|
|
if (for_addr)
|
|
goto err;
|
|
|
|
reg_type = g2d_get_reg_type(g2d, reg_offset);
|
|
|
|
buf_desc = &buf_info->descs[reg_type];
|
|
value = cmdlist->data[index + 1];
|
|
|
|
buf_desc->format = value & 0xf;
|
|
break;
|
|
case G2D_SRC_LEFT_TOP:
|
|
case G2D_DST_LEFT_TOP:
|
|
if (for_addr)
|
|
goto err;
|
|
|
|
reg_type = g2d_get_reg_type(g2d, reg_offset);
|
|
|
|
buf_desc = &buf_info->descs[reg_type];
|
|
value = cmdlist->data[index + 1];
|
|
|
|
buf_desc->left_x = value & 0x1fff;
|
|
buf_desc->top_y = (value & 0x1fff0000) >> 16;
|
|
break;
|
|
case G2D_SRC_RIGHT_BOTTOM:
|
|
case G2D_DST_RIGHT_BOTTOM:
|
|
if (for_addr)
|
|
goto err;
|
|
|
|
reg_type = g2d_get_reg_type(g2d, reg_offset);
|
|
|
|
buf_desc = &buf_info->descs[reg_type];
|
|
value = cmdlist->data[index + 1];
|
|
|
|
buf_desc->right_x = value & 0x1fff;
|
|
buf_desc->bottom_y = (value & 0x1fff0000) >> 16;
|
|
break;
|
|
default:
|
|
if (for_addr)
|
|
goto err;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
|
|
err:
|
|
dev_err(g2d->dev, "Bad register offset: 0x%lx\n", cmdlist->data[index]);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* ioctl functions */
|
|
int exynos_g2d_get_ver_ioctl(struct drm_device *drm_dev, void *data,
|
|
struct drm_file *file)
|
|
{
|
|
struct drm_exynos_g2d_get_ver *ver = data;
|
|
|
|
ver->major = G2D_HW_MAJOR_VER;
|
|
ver->minor = G2D_HW_MINOR_VER;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int exynos_g2d_set_cmdlist_ioctl(struct drm_device *drm_dev, void *data,
|
|
struct drm_file *file)
|
|
{
|
|
struct drm_exynos_file_private *file_priv = file->driver_priv;
|
|
struct exynos_drm_private *priv = drm_dev->dev_private;
|
|
struct g2d_data *g2d = dev_get_drvdata(priv->g2d_dev);
|
|
struct drm_exynos_g2d_set_cmdlist *req = data;
|
|
struct drm_exynos_g2d_cmd *cmd;
|
|
struct drm_exynos_pending_g2d_event *e;
|
|
struct g2d_cmdlist_node *node;
|
|
struct g2d_cmdlist *cmdlist;
|
|
int size;
|
|
int ret;
|
|
|
|
node = g2d_get_cmdlist(g2d);
|
|
if (!node)
|
|
return -ENOMEM;
|
|
|
|
/*
|
|
* To avoid an integer overflow for the later size computations, we
|
|
* enforce a maximum number of submitted commands here. This limit is
|
|
* sufficient for all conceivable usage cases of the G2D.
|
|
*/
|
|
if (req->cmd_nr > G2D_CMDLIST_DATA_NUM ||
|
|
req->cmd_buf_nr > G2D_CMDLIST_DATA_NUM) {
|
|
dev_err(g2d->dev, "number of submitted G2D commands exceeds limit\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
node->event = NULL;
|
|
|
|
if (req->event_type != G2D_EVENT_NOT) {
|
|
e = kzalloc(sizeof(*node->event), GFP_KERNEL);
|
|
if (!e) {
|
|
ret = -ENOMEM;
|
|
goto err;
|
|
}
|
|
|
|
e->event.base.type = DRM_EXYNOS_G2D_EVENT;
|
|
e->event.base.length = sizeof(e->event);
|
|
e->event.user_data = req->user_data;
|
|
|
|
ret = drm_event_reserve_init(drm_dev, file, &e->base, &e->event.base);
|
|
if (ret) {
|
|
kfree(e);
|
|
goto err;
|
|
}
|
|
|
|
node->event = e;
|
|
}
|
|
|
|
cmdlist = node->cmdlist;
|
|
|
|
cmdlist->last = 0;
|
|
|
|
/*
|
|
* If don't clear SFR registers, the cmdlist is affected by register
|
|
* values of previous cmdlist. G2D hw executes SFR clear command and
|
|
* a next command at the same time then the next command is ignored and
|
|
* is executed rightly from next next command, so needs a dummy command
|
|
* to next command of SFR clear command.
|
|
*/
|
|
cmdlist->data[cmdlist->last++] = G2D_SOFT_RESET;
|
|
cmdlist->data[cmdlist->last++] = G2D_SFRCLEAR;
|
|
cmdlist->data[cmdlist->last++] = G2D_SRC_BASE_ADDR;
|
|
cmdlist->data[cmdlist->last++] = 0;
|
|
|
|
/*
|
|
* 'LIST_HOLD' command should be set to the DMA_HOLD_CMD_REG
|
|
* and GCF bit should be set to INTEN register if user wants
|
|
* G2D interrupt event once current command list execution is
|
|
* finished.
|
|
* Otherwise only ACF bit should be set to INTEN register so
|
|
* that one interrupt is occurred after all command lists
|
|
* have been completed.
|
|
*/
|
|
if (node->event) {
|
|
cmdlist->data[cmdlist->last++] = G2D_INTEN;
|
|
cmdlist->data[cmdlist->last++] = G2D_INTEN_ACF | G2D_INTEN_GCF;
|
|
cmdlist->data[cmdlist->last++] = G2D_DMA_HOLD_CMD;
|
|
cmdlist->data[cmdlist->last++] = G2D_LIST_HOLD;
|
|
} else {
|
|
cmdlist->data[cmdlist->last++] = G2D_INTEN;
|
|
cmdlist->data[cmdlist->last++] = G2D_INTEN_ACF;
|
|
}
|
|
|
|
/*
|
|
* Check the size of cmdlist. The 2 that is added last comes from
|
|
* the implicit G2D_BITBLT_START that is appended once we have
|
|
* checked all the submitted commands.
|
|
*/
|
|
size = cmdlist->last + req->cmd_nr * 2 + req->cmd_buf_nr * 2 + 2;
|
|
if (size > G2D_CMDLIST_DATA_NUM) {
|
|
dev_err(g2d->dev, "cmdlist size is too big\n");
|
|
ret = -EINVAL;
|
|
goto err_free_event;
|
|
}
|
|
|
|
cmd = (struct drm_exynos_g2d_cmd *)(unsigned long)req->cmd;
|
|
|
|
if (copy_from_user(cmdlist->data + cmdlist->last,
|
|
(void __user *)cmd,
|
|
sizeof(*cmd) * req->cmd_nr)) {
|
|
ret = -EFAULT;
|
|
goto err_free_event;
|
|
}
|
|
cmdlist->last += req->cmd_nr * 2;
|
|
|
|
ret = g2d_check_reg_offset(g2d, node, req->cmd_nr, false);
|
|
if (ret < 0)
|
|
goto err_free_event;
|
|
|
|
node->buf_info.map_nr = req->cmd_buf_nr;
|
|
if (req->cmd_buf_nr) {
|
|
struct drm_exynos_g2d_cmd *cmd_buf;
|
|
|
|
cmd_buf = (struct drm_exynos_g2d_cmd *)
|
|
(unsigned long)req->cmd_buf;
|
|
|
|
if (copy_from_user(cmdlist->data + cmdlist->last,
|
|
(void __user *)cmd_buf,
|
|
sizeof(*cmd_buf) * req->cmd_buf_nr)) {
|
|
ret = -EFAULT;
|
|
goto err_free_event;
|
|
}
|
|
cmdlist->last += req->cmd_buf_nr * 2;
|
|
|
|
ret = g2d_check_reg_offset(g2d, node, req->cmd_buf_nr, true);
|
|
if (ret < 0)
|
|
goto err_free_event;
|
|
|
|
ret = g2d_map_cmdlist_gem(g2d, node, drm_dev, file);
|
|
if (ret < 0)
|
|
goto err_unmap;
|
|
}
|
|
|
|
cmdlist->data[cmdlist->last++] = G2D_BITBLT_START;
|
|
cmdlist->data[cmdlist->last++] = G2D_START_BITBLT;
|
|
|
|
/* head */
|
|
cmdlist->head = cmdlist->last / 2;
|
|
|
|
/* tail */
|
|
cmdlist->data[cmdlist->last] = 0;
|
|
|
|
g2d_add_cmdlist_to_inuse(file_priv, node);
|
|
|
|
return 0;
|
|
|
|
err_unmap:
|
|
g2d_unmap_cmdlist_gem(g2d, node, file);
|
|
err_free_event:
|
|
if (node->event)
|
|
drm_event_cancel_free(drm_dev, &node->event->base);
|
|
err:
|
|
g2d_put_cmdlist(g2d, node);
|
|
return ret;
|
|
}
|
|
|
|
int exynos_g2d_exec_ioctl(struct drm_device *drm_dev, void *data,
|
|
struct drm_file *file)
|
|
{
|
|
struct drm_exynos_file_private *file_priv = file->driver_priv;
|
|
struct exynos_drm_private *priv = drm_dev->dev_private;
|
|
struct g2d_data *g2d = dev_get_drvdata(priv->g2d_dev);
|
|
struct drm_exynos_g2d_exec *req = data;
|
|
struct g2d_runqueue_node *runqueue_node;
|
|
struct list_head *run_cmdlist;
|
|
struct list_head *event_list;
|
|
|
|
runqueue_node = kmem_cache_alloc(g2d->runqueue_slab, GFP_KERNEL);
|
|
if (!runqueue_node)
|
|
return -ENOMEM;
|
|
|
|
run_cmdlist = &runqueue_node->run_cmdlist;
|
|
event_list = &runqueue_node->event_list;
|
|
INIT_LIST_HEAD(run_cmdlist);
|
|
INIT_LIST_HEAD(event_list);
|
|
init_completion(&runqueue_node->complete);
|
|
runqueue_node->async = req->async;
|
|
|
|
list_splice_init(&file_priv->inuse_cmdlist, run_cmdlist);
|
|
list_splice_init(&file_priv->event_list, event_list);
|
|
|
|
if (list_empty(run_cmdlist)) {
|
|
dev_err(g2d->dev, "there is no inuse cmdlist\n");
|
|
kmem_cache_free(g2d->runqueue_slab, runqueue_node);
|
|
return -EPERM;
|
|
}
|
|
|
|
mutex_lock(&g2d->runqueue_mutex);
|
|
runqueue_node->pid = current->pid;
|
|
runqueue_node->filp = file;
|
|
list_add_tail(&runqueue_node->list, &g2d->runqueue);
|
|
mutex_unlock(&g2d->runqueue_mutex);
|
|
|
|
/* Let the runqueue know that there is work to do. */
|
|
queue_work(g2d->g2d_workq, &g2d->runqueue_work);
|
|
|
|
if (runqueue_node->async)
|
|
goto out;
|
|
|
|
wait_for_completion(&runqueue_node->complete);
|
|
g2d_free_runqueue_node(g2d, runqueue_node);
|
|
|
|
out:
|
|
return 0;
|
|
}
|
|
|
|
int g2d_open(struct drm_device *drm_dev, struct drm_file *file)
|
|
{
|
|
struct drm_exynos_file_private *file_priv = file->driver_priv;
|
|
|
|
INIT_LIST_HEAD(&file_priv->inuse_cmdlist);
|
|
INIT_LIST_HEAD(&file_priv->event_list);
|
|
INIT_LIST_HEAD(&file_priv->userptr_list);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void g2d_close(struct drm_device *drm_dev, struct drm_file *file)
|
|
{
|
|
struct drm_exynos_file_private *file_priv = file->driver_priv;
|
|
struct exynos_drm_private *priv = drm_dev->dev_private;
|
|
struct g2d_data *g2d;
|
|
struct g2d_cmdlist_node *node, *n;
|
|
|
|
if (!priv->g2d_dev)
|
|
return;
|
|
|
|
g2d = dev_get_drvdata(priv->g2d_dev);
|
|
|
|
/* Remove the runqueue nodes that belong to us. */
|
|
mutex_lock(&g2d->runqueue_mutex);
|
|
g2d_remove_runqueue_nodes(g2d, file);
|
|
mutex_unlock(&g2d->runqueue_mutex);
|
|
|
|
/*
|
|
* Wait for the runqueue worker to finish its current node.
|
|
* After this the engine should no longer be accessing any
|
|
* memory belonging to us.
|
|
*/
|
|
g2d_wait_finish(g2d, file);
|
|
|
|
/*
|
|
* Even after the engine is idle, there might still be stale cmdlists
|
|
* (i.e. cmdlisst which we submitted but never executed) around, with
|
|
* their corresponding GEM/userptr buffers.
|
|
* Properly unmap these buffers here.
|
|
*/
|
|
mutex_lock(&g2d->cmdlist_mutex);
|
|
list_for_each_entry_safe(node, n, &file_priv->inuse_cmdlist, list) {
|
|
g2d_unmap_cmdlist_gem(g2d, node, file);
|
|
list_move_tail(&node->list, &g2d->free_cmdlist);
|
|
}
|
|
mutex_unlock(&g2d->cmdlist_mutex);
|
|
|
|
/* release all g2d_userptr in pool. */
|
|
g2d_userptr_free_all(g2d, file);
|
|
}
|
|
|
|
static int g2d_bind(struct device *dev, struct device *master, void *data)
|
|
{
|
|
struct g2d_data *g2d = dev_get_drvdata(dev);
|
|
struct drm_device *drm_dev = data;
|
|
struct exynos_drm_private *priv = drm_dev->dev_private;
|
|
int ret;
|
|
|
|
g2d->drm_dev = drm_dev;
|
|
|
|
/* allocate dma-aware cmdlist buffer. */
|
|
ret = g2d_init_cmdlist(g2d);
|
|
if (ret < 0) {
|
|
dev_err(dev, "cmdlist init failed\n");
|
|
return ret;
|
|
}
|
|
|
|
ret = exynos_drm_register_dma(drm_dev, dev, &g2d->dma_priv);
|
|
if (ret < 0) {
|
|
dev_err(dev, "failed to enable iommu.\n");
|
|
g2d_fini_cmdlist(g2d);
|
|
return ret;
|
|
}
|
|
priv->g2d_dev = dev;
|
|
|
|
dev_info(dev, "The Exynos G2D (ver %d.%d) successfully registered.\n",
|
|
G2D_HW_MAJOR_VER, G2D_HW_MINOR_VER);
|
|
return 0;
|
|
}
|
|
|
|
static void g2d_unbind(struct device *dev, struct device *master, void *data)
|
|
{
|
|
struct g2d_data *g2d = dev_get_drvdata(dev);
|
|
struct drm_device *drm_dev = data;
|
|
struct exynos_drm_private *priv = drm_dev->dev_private;
|
|
|
|
/* Suspend operation and wait for engine idle. */
|
|
set_bit(G2D_BIT_SUSPEND_RUNQUEUE, &g2d->flags);
|
|
g2d_wait_finish(g2d, NULL);
|
|
priv->g2d_dev = NULL;
|
|
|
|
cancel_work_sync(&g2d->runqueue_work);
|
|
exynos_drm_unregister_dma(g2d->drm_dev, dev, &g2d->dma_priv);
|
|
}
|
|
|
|
static const struct component_ops g2d_component_ops = {
|
|
.bind = g2d_bind,
|
|
.unbind = g2d_unbind,
|
|
};
|
|
|
|
static int g2d_probe(struct platform_device *pdev)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct resource *res;
|
|
struct g2d_data *g2d;
|
|
int ret;
|
|
|
|
g2d = devm_kzalloc(dev, sizeof(*g2d), GFP_KERNEL);
|
|
if (!g2d)
|
|
return -ENOMEM;
|
|
|
|
g2d->runqueue_slab = kmem_cache_create("g2d_runqueue_slab",
|
|
sizeof(struct g2d_runqueue_node), 0, 0, NULL);
|
|
if (!g2d->runqueue_slab)
|
|
return -ENOMEM;
|
|
|
|
g2d->dev = dev;
|
|
|
|
g2d->g2d_workq = create_singlethread_workqueue("g2d");
|
|
if (!g2d->g2d_workq) {
|
|
dev_err(dev, "failed to create workqueue\n");
|
|
ret = -EINVAL;
|
|
goto err_destroy_slab;
|
|
}
|
|
|
|
INIT_WORK(&g2d->runqueue_work, g2d_runqueue_worker);
|
|
INIT_LIST_HEAD(&g2d->free_cmdlist);
|
|
INIT_LIST_HEAD(&g2d->runqueue);
|
|
|
|
mutex_init(&g2d->cmdlist_mutex);
|
|
mutex_init(&g2d->runqueue_mutex);
|
|
|
|
g2d->gate_clk = devm_clk_get(dev, "fimg2d");
|
|
if (IS_ERR(g2d->gate_clk)) {
|
|
dev_err(dev, "failed to get gate clock\n");
|
|
ret = PTR_ERR(g2d->gate_clk);
|
|
goto err_destroy_workqueue;
|
|
}
|
|
|
|
pm_runtime_use_autosuspend(dev);
|
|
pm_runtime_set_autosuspend_delay(dev, 2000);
|
|
pm_runtime_enable(dev);
|
|
clear_bit(G2D_BIT_SUSPEND_RUNQUEUE, &g2d->flags);
|
|
clear_bit(G2D_BIT_ENGINE_BUSY, &g2d->flags);
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
|
|
g2d->regs = devm_ioremap_resource(dev, res);
|
|
if (IS_ERR(g2d->regs)) {
|
|
ret = PTR_ERR(g2d->regs);
|
|
goto err_put_clk;
|
|
}
|
|
|
|
g2d->irq = platform_get_irq(pdev, 0);
|
|
if (g2d->irq < 0) {
|
|
ret = g2d->irq;
|
|
goto err_put_clk;
|
|
}
|
|
|
|
ret = devm_request_irq(dev, g2d->irq, g2d_irq_handler, 0,
|
|
"drm_g2d", g2d);
|
|
if (ret < 0) {
|
|
dev_err(dev, "irq request failed\n");
|
|
goto err_put_clk;
|
|
}
|
|
|
|
g2d->max_pool = MAX_POOL;
|
|
|
|
platform_set_drvdata(pdev, g2d);
|
|
|
|
ret = component_add(dev, &g2d_component_ops);
|
|
if (ret < 0) {
|
|
dev_err(dev, "failed to register drm g2d device\n");
|
|
goto err_put_clk;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_put_clk:
|
|
pm_runtime_disable(dev);
|
|
err_destroy_workqueue:
|
|
destroy_workqueue(g2d->g2d_workq);
|
|
err_destroy_slab:
|
|
kmem_cache_destroy(g2d->runqueue_slab);
|
|
return ret;
|
|
}
|
|
|
|
static int g2d_remove(struct platform_device *pdev)
|
|
{
|
|
struct g2d_data *g2d = platform_get_drvdata(pdev);
|
|
|
|
component_del(&pdev->dev, &g2d_component_ops);
|
|
|
|
/* There should be no locking needed here. */
|
|
g2d_remove_runqueue_nodes(g2d, NULL);
|
|
|
|
pm_runtime_dont_use_autosuspend(&pdev->dev);
|
|
pm_runtime_disable(&pdev->dev);
|
|
|
|
g2d_fini_cmdlist(g2d);
|
|
destroy_workqueue(g2d->g2d_workq);
|
|
kmem_cache_destroy(g2d->runqueue_slab);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static int g2d_suspend(struct device *dev)
|
|
{
|
|
struct g2d_data *g2d = dev_get_drvdata(dev);
|
|
|
|
/*
|
|
* Suspend the runqueue worker operation and wait until the G2D
|
|
* engine is idle.
|
|
*/
|
|
set_bit(G2D_BIT_SUSPEND_RUNQUEUE, &g2d->flags);
|
|
g2d_wait_finish(g2d, NULL);
|
|
flush_work(&g2d->runqueue_work);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int g2d_resume(struct device *dev)
|
|
{
|
|
struct g2d_data *g2d = dev_get_drvdata(dev);
|
|
|
|
clear_bit(G2D_BIT_SUSPEND_RUNQUEUE, &g2d->flags);
|
|
queue_work(g2d->g2d_workq, &g2d->runqueue_work);
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_PM
|
|
static int g2d_runtime_suspend(struct device *dev)
|
|
{
|
|
struct g2d_data *g2d = dev_get_drvdata(dev);
|
|
|
|
clk_disable_unprepare(g2d->gate_clk);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int g2d_runtime_resume(struct device *dev)
|
|
{
|
|
struct g2d_data *g2d = dev_get_drvdata(dev);
|
|
int ret;
|
|
|
|
ret = clk_prepare_enable(g2d->gate_clk);
|
|
if (ret < 0)
|
|
dev_warn(dev, "failed to enable clock.\n");
|
|
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
static const struct dev_pm_ops g2d_pm_ops = {
|
|
SET_SYSTEM_SLEEP_PM_OPS(g2d_suspend, g2d_resume)
|
|
SET_RUNTIME_PM_OPS(g2d_runtime_suspend, g2d_runtime_resume, NULL)
|
|
};
|
|
|
|
static const struct of_device_id exynos_g2d_match[] = {
|
|
{ .compatible = "samsung,exynos5250-g2d" },
|
|
{ .compatible = "samsung,exynos4212-g2d" },
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, exynos_g2d_match);
|
|
|
|
struct platform_driver g2d_driver = {
|
|
.probe = g2d_probe,
|
|
.remove = g2d_remove,
|
|
.driver = {
|
|
.name = "exynos-drm-g2d",
|
|
.owner = THIS_MODULE,
|
|
.pm = &g2d_pm_ops,
|
|
.of_match_table = exynos_g2d_match,
|
|
},
|
|
};
|