| /* |
| * Copyright (C) 2012 Samsung Electronics Co.Ltd |
| * Authors: Joonyoung Shim <jy0922.shim@samsung.com> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundationr |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/clk.h> |
| #include <linux/err.h> |
| #include <linux/interrupt.h> |
| #include <linux/io.h> |
| #include <linux/platform_device.h> |
| #include <linux/pm_runtime.h> |
| #include <linux/slab.h> |
| #include <linux/workqueue.h> |
| #include <linux/dma-mapping.h> |
| #include <linux/of.h> |
| |
| #include <drm/drmP.h> |
| #include <drm/exynos_drm.h> |
| #include "exynos_drm_drv.h" |
| #include "exynos_drm_g2d.h" |
| #include "exynos_drm_gem.h" |
| #include "exynos_drm_iommu.h" |
| |
| #define G2D_HW_MAJOR_VER 4 |
| #define G2D_HW_MINOR_VER 1 |
| |
| /* vaild register range set from user: 0x0104 ~ 0x0880 */ |
| #define G2D_VALID_START 0x0104 |
| #define G2D_VALID_END 0x0880 |
| |
| /* general registers */ |
| #define G2D_SOFT_RESET 0x0000 |
| #define G2D_INTEN 0x0004 |
| #define G2D_INTC_PEND 0x000C |
| #define G2D_DMA_SFR_BASE_ADDR 0x0080 |
| #define G2D_DMA_COMMAND 0x0084 |
| #define G2D_DMA_STATUS 0x008C |
| #define G2D_DMA_HOLD_CMD 0x0090 |
| |
| /* command registers */ |
| #define G2D_BITBLT_START 0x0100 |
| |
| /* registers for base address */ |
| #define G2D_SRC_BASE_ADDR 0x0304 |
| #define G2D_SRC_STRIDE 0x0308 |
| #define G2D_SRC_COLOR_MODE 0x030C |
| #define G2D_SRC_LEFT_TOP 0x0310 |
| #define G2D_SRC_RIGHT_BOTTOM 0x0314 |
| #define G2D_SRC_PLANE2_BASE_ADDR 0x0318 |
| #define G2D_DST_BASE_ADDR 0x0404 |
| #define G2D_DST_STRIDE 0x0408 |
| #define G2D_DST_COLOR_MODE 0x040C |
| #define G2D_DST_LEFT_TOP 0x0410 |
| #define G2D_DST_RIGHT_BOTTOM 0x0414 |
| #define G2D_DST_PLANE2_BASE_ADDR 0x0418 |
| #define G2D_PAT_BASE_ADDR 0x0500 |
| #define G2D_MSK_BASE_ADDR 0x0520 |
| |
| /* G2D_SOFT_RESET */ |
| #define G2D_SFRCLEAR (1 << 1) |
| #define G2D_R (1 << 0) |
| |
| /* G2D_INTEN */ |
| #define G2D_INTEN_ACF (1 << 3) |
| #define G2D_INTEN_UCF (1 << 2) |
| #define G2D_INTEN_GCF (1 << 1) |
| #define G2D_INTEN_SCF (1 << 0) |
| |
| /* G2D_INTC_PEND */ |
| #define G2D_INTP_ACMD_FIN (1 << 3) |
| #define G2D_INTP_UCMD_FIN (1 << 2) |
| #define G2D_INTP_GCMD_FIN (1 << 1) |
| #define G2D_INTP_SCMD_FIN (1 << 0) |
| |
| /* G2D_DMA_COMMAND */ |
| #define G2D_DMA_HALT (1 << 2) |
| #define G2D_DMA_CONTINUE (1 << 1) |
| #define G2D_DMA_START (1 << 0) |
| |
| /* G2D_DMA_STATUS */ |
| #define G2D_DMA_LIST_DONE_COUNT (0xFF << 17) |
| #define G2D_DMA_BITBLT_DONE_COUNT (0xFFFF << 1) |
| #define G2D_DMA_DONE (1 << 0) |
| #define G2D_DMA_LIST_DONE_COUNT_OFFSET 17 |
| |
| /* G2D_DMA_HOLD_CMD */ |
| #define G2D_USER_HOLD (1 << 2) |
| #define G2D_LIST_HOLD (1 << 1) |
| #define G2D_BITBLT_HOLD (1 << 0) |
| |
| /* G2D_BITBLT_START */ |
| #define G2D_START_CASESEL (1 << 2) |
| #define G2D_START_NHOLT (1 << 1) |
| #define G2D_START_BITBLT (1 << 0) |
| |
| /* buffer color format */ |
| #define G2D_FMT_XRGB8888 0 |
| #define G2D_FMT_ARGB8888 1 |
| #define G2D_FMT_RGB565 2 |
| #define G2D_FMT_XRGB1555 3 |
| #define G2D_FMT_ARGB1555 4 |
| #define G2D_FMT_XRGB4444 5 |
| #define G2D_FMT_ARGB4444 6 |
| #define G2D_FMT_PACKED_RGB888 7 |
| #define G2D_FMT_A8 11 |
| #define G2D_FMT_L8 12 |
| |
| /* buffer valid length */ |
| #define G2D_LEN_MIN 1 |
| #define G2D_LEN_MAX 8000 |
| |
| #define G2D_CMDLIST_SIZE (PAGE_SIZE / 4) |
| #define G2D_CMDLIST_NUM 64 |
| #define G2D_CMDLIST_POOL_SIZE (G2D_CMDLIST_SIZE * G2D_CMDLIST_NUM) |
| #define G2D_CMDLIST_DATA_NUM (G2D_CMDLIST_SIZE / sizeof(u32) - 2) |
| |
| /* maximum buffer pool size of userptr is 64MB as default */ |
| #define MAX_POOL (64 * 1024 * 1024) |
| |
| enum { |
| BUF_TYPE_GEM = 1, |
| BUF_TYPE_USERPTR, |
| }; |
| |
| enum g2d_reg_type { |
| REG_TYPE_NONE = -1, |
| REG_TYPE_SRC, |
| REG_TYPE_SRC_PLANE2, |
| REG_TYPE_DST, |
| REG_TYPE_DST_PLANE2, |
| REG_TYPE_PAT, |
| REG_TYPE_MSK, |
| MAX_REG_TYPE_NR |
| }; |
| |
| enum g2d_flag_bits { |
| /* |
| * If set, suspends the runqueue worker after the currently |
| * processed node is finished. |
| */ |
| G2D_BIT_SUSPEND_RUNQUEUE, |
| /* |
| * If set, indicates that the engine is currently busy. |
| */ |
| G2D_BIT_ENGINE_BUSY, |
| }; |
| |
| /* cmdlist data structure */ |
| struct g2d_cmdlist { |
| u32 head; |
| unsigned long data[G2D_CMDLIST_DATA_NUM]; |
| u32 last; /* last data offset */ |
| }; |
| |
| /* |
| * A structure of buffer description |
| * |
| * @format: color format |
| * @stride: buffer stride/pitch in bytes |
| * @left_x: the x coordinates of left top corner |
| * @top_y: the y coordinates of left top corner |
| * @right_x: the x coordinates of right bottom corner |
| * @bottom_y: the y coordinates of right bottom corner |
| * |
| */ |
| struct g2d_buf_desc { |
| unsigned int format; |
| unsigned int stride; |
| unsigned int left_x; |
| unsigned int top_y; |
| unsigned int right_x; |
| unsigned int bottom_y; |
| }; |
| |
| /* |
| * A structure of buffer information |
| * |
| * @map_nr: manages the number of mapped buffers |
| * @reg_types: stores regitster type in the order of requested command |
| * @handles: stores buffer handle in its reg_type position |
| * @types: stores buffer type in its reg_type position |
| * @descs: stores buffer description in its reg_type position |
| * |
| */ |
| struct g2d_buf_info { |
| unsigned int map_nr; |
| enum g2d_reg_type reg_types[MAX_REG_TYPE_NR]; |
| unsigned long handles[MAX_REG_TYPE_NR]; |
| unsigned int types[MAX_REG_TYPE_NR]; |
| struct g2d_buf_desc descs[MAX_REG_TYPE_NR]; |
| }; |
| |
| struct drm_exynos_pending_g2d_event { |
| struct drm_pending_event base; |
| struct drm_exynos_g2d_event event; |
| }; |
| |
| struct g2d_cmdlist_userptr { |
| struct list_head list; |
| dma_addr_t dma_addr; |
| unsigned long userptr; |
| unsigned long size; |
| struct frame_vector *vec; |
| struct sg_table *sgt; |
| atomic_t refcount; |
| bool in_pool; |
| bool out_of_list; |
| }; |
| struct g2d_cmdlist_node { |
| struct list_head list; |
| struct g2d_cmdlist *cmdlist; |
| dma_addr_t dma_addr; |
| struct g2d_buf_info buf_info; |
| |
| struct drm_exynos_pending_g2d_event *event; |
| }; |
| |
| struct g2d_runqueue_node { |
| struct list_head list; |
| struct list_head run_cmdlist; |
| struct list_head event_list; |
| struct drm_file *filp; |
| pid_t pid; |
| struct completion complete; |
| int async; |
| }; |
| |
| struct g2d_data { |
| struct device *dev; |
| struct clk *gate_clk; |
| void __iomem *regs; |
| int irq; |
| struct workqueue_struct *g2d_workq; |
| struct work_struct runqueue_work; |
| struct exynos_drm_subdrv subdrv; |
| unsigned long flags; |
| |
| /* cmdlist */ |
| struct g2d_cmdlist_node *cmdlist_node; |
| struct list_head free_cmdlist; |
| struct mutex cmdlist_mutex; |
| dma_addr_t cmdlist_pool; |
| void *cmdlist_pool_virt; |
| unsigned long cmdlist_dma_attrs; |
| |
| /* runqueue*/ |
| struct g2d_runqueue_node *runqueue_node; |
| struct list_head runqueue; |
| struct mutex runqueue_mutex; |
| struct kmem_cache *runqueue_slab; |
| |
| unsigned long current_pool; |
| unsigned long max_pool; |
| }; |
| |
| static inline void g2d_hw_reset(struct g2d_data *g2d) |
| { |
| writel(G2D_R | G2D_SFRCLEAR, g2d->regs + G2D_SOFT_RESET); |
| clear_bit(G2D_BIT_ENGINE_BUSY, &g2d->flags); |
| } |
| |
| static int g2d_init_cmdlist(struct g2d_data *g2d) |
| { |
| struct device *dev = g2d->dev; |
| struct g2d_cmdlist_node *node = g2d->cmdlist_node; |
| struct exynos_drm_subdrv *subdrv = &g2d->subdrv; |
| int nr; |
| int ret; |
| struct g2d_buf_info *buf_info; |
| |
| g2d->cmdlist_dma_attrs = DMA_ATTR_WRITE_COMBINE; |
| |
| g2d->cmdlist_pool_virt = dma_alloc_attrs(to_dma_dev(subdrv->drm_dev), |
| G2D_CMDLIST_POOL_SIZE, |
| &g2d->cmdlist_pool, GFP_KERNEL, |
| g2d->cmdlist_dma_attrs); |
| if (!g2d->cmdlist_pool_virt) { |
| dev_err(dev, "failed to allocate dma memory\n"); |
| return -ENOMEM; |
| } |
| |
| node = kcalloc(G2D_CMDLIST_NUM, sizeof(*node), GFP_KERNEL); |
| if (!node) { |
| dev_err(dev, "failed to allocate memory\n"); |
| ret = -ENOMEM; |
| goto err; |
| } |
| |
| for (nr = 0; nr < G2D_CMDLIST_NUM; nr++) { |
| unsigned int i; |
| |
| node[nr].cmdlist = |
| g2d->cmdlist_pool_virt + nr * G2D_CMDLIST_SIZE; |
| node[nr].dma_addr = |
| g2d->cmdlist_pool + nr * G2D_CMDLIST_SIZE; |
| |
| buf_info = &node[nr].buf_info; |
| for (i = 0; i < MAX_REG_TYPE_NR; i++) |
| buf_info->reg_types[i] = REG_TYPE_NONE; |
| |
| list_add_tail(&node[nr].list, &g2d->free_cmdlist); |
| } |
| |
| return 0; |
| |
| err: |
| dma_free_attrs(to_dma_dev(subdrv->drm_dev), G2D_CMDLIST_POOL_SIZE, |
| g2d->cmdlist_pool_virt, |
| g2d->cmdlist_pool, g2d->cmdlist_dma_attrs); |
| return ret; |
| } |
| |
| static void g2d_fini_cmdlist(struct g2d_data *g2d) |
| { |
| struct exynos_drm_subdrv *subdrv = &g2d->subdrv; |
| |
| kfree(g2d->cmdlist_node); |
| |
| if (g2d->cmdlist_pool_virt && g2d->cmdlist_pool) { |
| dma_free_attrs(to_dma_dev(subdrv->drm_dev), |
| G2D_CMDLIST_POOL_SIZE, |
| g2d->cmdlist_pool_virt, |
| g2d->cmdlist_pool, g2d->cmdlist_dma_attrs); |
| } |
| } |
| |
| static struct g2d_cmdlist_node *g2d_get_cmdlist(struct g2d_data *g2d) |
| { |
| struct device *dev = g2d->dev; |
| struct g2d_cmdlist_node *node; |
| |
| mutex_lock(&g2d->cmdlist_mutex); |
| if (list_empty(&g2d->free_cmdlist)) { |
| dev_err(dev, "there is no free cmdlist\n"); |
| mutex_unlock(&g2d->cmdlist_mutex); |
| return NULL; |
| } |
| |
| node = list_first_entry(&g2d->free_cmdlist, struct g2d_cmdlist_node, |
| list); |
| list_del_init(&node->list); |
| mutex_unlock(&g2d->cmdlist_mutex); |
| |
| return node; |
| } |
| |
| static void g2d_put_cmdlist(struct g2d_data *g2d, struct g2d_cmdlist_node *node) |
| { |
| mutex_lock(&g2d->cmdlist_mutex); |
| list_move_tail(&node->list, &g2d->free_cmdlist); |
| mutex_unlock(&g2d->cmdlist_mutex); |
| } |
| |
| static void g2d_add_cmdlist_to_inuse(struct exynos_drm_g2d_private *g2d_priv, |
| struct g2d_cmdlist_node *node) |
| { |
| struct g2d_cmdlist_node *lnode; |
| |
| if (list_empty(&g2d_priv->inuse_cmdlist)) |
| goto add_to_list; |
| |
| /* this links to base address of new cmdlist */ |
| lnode = list_entry(g2d_priv->inuse_cmdlist.prev, |
| struct g2d_cmdlist_node, list); |
| lnode->cmdlist->data[lnode->cmdlist->last] = node->dma_addr; |
| |
| add_to_list: |
| list_add_tail(&node->list, &g2d_priv->inuse_cmdlist); |
| |
| if (node->event) |
| list_add_tail(&node->event->base.link, &g2d_priv->event_list); |
| } |
| |
| static void g2d_userptr_put_dma_addr(struct drm_device *drm_dev, |
| unsigned long obj, |
| bool force) |
| { |
| struct g2d_cmdlist_userptr *g2d_userptr = |
| (struct g2d_cmdlist_userptr *)obj; |
| struct page **pages; |
| |
| if (!obj) |
| return; |
| |
| if (force) |
| goto out; |
| |
| atomic_dec(&g2d_userptr->refcount); |
| |
| if (atomic_read(&g2d_userptr->refcount) > 0) |
| return; |
| |
| if (g2d_userptr->in_pool) |
| return; |
| |
| out: |
| dma_unmap_sg(to_dma_dev(drm_dev), g2d_userptr->sgt->sgl, |
| g2d_userptr->sgt->nents, DMA_BIDIRECTIONAL); |
| |
| pages = frame_vector_pages(g2d_userptr->vec); |
| if (!IS_ERR(pages)) { |
| int i; |
| |
| for (i = 0; i < frame_vector_count(g2d_userptr->vec); i++) |
| set_page_dirty_lock(pages[i]); |
| } |
| put_vaddr_frames(g2d_userptr->vec); |
| frame_vector_destroy(g2d_userptr->vec); |
| |
| if (!g2d_userptr->out_of_list) |
| list_del_init(&g2d_userptr->list); |
| |
| sg_free_table(g2d_userptr->sgt); |
| kfree(g2d_userptr->sgt); |
| kfree(g2d_userptr); |
| } |
| |
| static dma_addr_t *g2d_userptr_get_dma_addr(struct drm_device *drm_dev, |
| unsigned long userptr, |
| unsigned long size, |
| struct drm_file *filp, |
| unsigned long *obj) |
| { |
| struct drm_exynos_file_private *file_priv = filp->driver_priv; |
| struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv; |
| struct g2d_cmdlist_userptr *g2d_userptr; |
| struct g2d_data *g2d; |
| struct sg_table *sgt; |
| unsigned long start, end; |
| unsigned int npages, offset; |
| int ret; |
| |
| if (!size) { |
| DRM_ERROR("invalid userptr size.\n"); |
| return ERR_PTR(-EINVAL); |
| } |
| |
| g2d = dev_get_drvdata(g2d_priv->dev); |
| |
| /* check if userptr already exists in userptr_list. */ |
| list_for_each_entry(g2d_userptr, &g2d_priv->userptr_list, list) { |
| if (g2d_userptr->userptr == userptr) { |
| /* |
| * also check size because there could be same address |
| * and different size. |
| */ |
| if (g2d_userptr->size == size) { |
| atomic_inc(&g2d_userptr->refcount); |
| *obj = (unsigned long)g2d_userptr; |
| |
| return &g2d_userptr->dma_addr; |
| } |
| |
| /* |
| * at this moment, maybe g2d dma is accessing this |
| * g2d_userptr memory region so just remove this |
| * g2d_userptr object from userptr_list not to be |
| * referred again and also except it the userptr |
| * pool to be released after the dma access completion. |
| */ |
| g2d_userptr->out_of_list = true; |
| g2d_userptr->in_pool = false; |
| list_del_init(&g2d_userptr->list); |
| |
| break; |
| } |
| } |
| |
| g2d_userptr = kzalloc(sizeof(*g2d_userptr), GFP_KERNEL); |
| if (!g2d_userptr) |
| return ERR_PTR(-ENOMEM); |
| |
| atomic_set(&g2d_userptr->refcount, 1); |
| g2d_userptr->size = size; |
| |
| start = userptr & PAGE_MASK; |
| offset = userptr & ~PAGE_MASK; |
| end = PAGE_ALIGN(userptr + size); |
| npages = (end - start) >> PAGE_SHIFT; |
| g2d_userptr->vec = frame_vector_create(npages); |
| if (!g2d_userptr->vec) { |
| ret = -ENOMEM; |
| goto err_free; |
| } |
| |
| ret = get_vaddr_frames(start, npages, FOLL_FORCE | FOLL_WRITE, |
| g2d_userptr->vec); |
| if (ret != npages) { |
| DRM_ERROR("failed to get user pages from userptr.\n"); |
| if (ret < 0) |
| goto err_destroy_framevec; |
| ret = -EFAULT; |
| goto err_put_framevec; |
| } |
| if (frame_vector_to_pages(g2d_userptr->vec) < 0) { |
| ret = -EFAULT; |
| goto err_put_framevec; |
| } |
| |
| sgt = kzalloc(sizeof(*sgt), GFP_KERNEL); |
| if (!sgt) { |
| ret = -ENOMEM; |
| goto err_put_framevec; |
| } |
| |
| ret = sg_alloc_table_from_pages(sgt, |
| frame_vector_pages(g2d_userptr->vec), |
| npages, offset, size, GFP_KERNEL); |
| if (ret < 0) { |
| DRM_ERROR("failed to get sgt from pages.\n"); |
| goto err_free_sgt; |
| } |
| |
| g2d_userptr->sgt = sgt; |
| |
| if (!dma_map_sg(to_dma_dev(drm_dev), sgt->sgl, sgt->nents, |
| DMA_BIDIRECTIONAL)) { |
| DRM_ERROR("failed to map sgt with dma region.\n"); |
| ret = -ENOMEM; |
| goto err_sg_free_table; |
| } |
| |
| g2d_userptr->dma_addr = sgt->sgl[0].dma_address; |
| g2d_userptr->userptr = userptr; |
| |
| list_add_tail(&g2d_userptr->list, &g2d_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 = (unsigned long)g2d_userptr; |
| |
| return &g2d_userptr->dma_addr; |
| |
| err_sg_free_table: |
| sg_free_table(sgt); |
| |
| err_free_sgt: |
| kfree(sgt); |
| |
| err_put_framevec: |
| put_vaddr_frames(g2d_userptr->vec); |
| |
| err_destroy_framevec: |
| frame_vector_destroy(g2d_userptr->vec); |
| |
| err_free: |
| kfree(g2d_userptr); |
| |
| return ERR_PTR(ret); |
| } |
| |
| static void g2d_userptr_free_all(struct drm_device *drm_dev, |
| struct g2d_data *g2d, |
| struct drm_file *filp) |
| { |
| struct drm_exynos_file_private *file_priv = filp->driver_priv; |
| struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv; |
| struct g2d_cmdlist_userptr *g2d_userptr, *n; |
| |
| list_for_each_entry_safe(g2d_userptr, n, &g2d_priv->userptr_list, list) |
| if (g2d_userptr->in_pool) |
| g2d_userptr_put_dma_addr(drm_dev, |
| (unsigned long)g2d_userptr, |
| true); |
| |
| g2d->current_pool = 0; |
| } |
| |
| static enum g2d_reg_type g2d_get_reg_type(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_ERROR("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_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_ERROR("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_ERROR("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_ERROR("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(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) { |
| unsigned long size; |
| |
| size = exynos_drm_gem_get_size(drm_dev, handle, file); |
| if (!size) { |
| ret = -EFAULT; |
| goto err; |
| } |
| |
| if (!g2d_check_buf_desc_is_valid(buf_desc, reg_type, |
| size)) { |
| ret = -EFAULT; |
| goto err; |
| } |
| |
| addr = exynos_drm_gem_get_dma_addr(drm_dev, handle, |
| file); |
| if (IS_ERR(addr)) { |
| ret = -EFAULT; |
| goto err; |
| } |
| } 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(buf_desc, reg_type, |
| g2d_userptr.size)) { |
| ret = -EFAULT; |
| goto err; |
| } |
| |
| addr = g2d_userptr_get_dma_addr(drm_dev, |
| g2d_userptr.userptr, |
| g2d_userptr.size, |
| file, |
| &handle); |
| if (IS_ERR(addr)) { |
| ret = -EFAULT; |
| goto err; |
| } |
| } |
| |
| cmdlist->data[reg_pos + 1] = *addr; |
| buf_info->reg_types[i] = reg_type; |
| buf_info->handles[reg_type] = handle; |
| } |
| |
| 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 exynos_drm_subdrv *subdrv = &g2d->subdrv; |
| 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; |
| unsigned long handle; |
| |
| reg_type = buf_info->reg_types[i]; |
| |
| buf_desc = &buf_info->descs[reg_type]; |
| handle = buf_info->handles[reg_type]; |
| |
| if (buf_info->types[reg_type] == BUF_TYPE_GEM) |
| exynos_drm_gem_put_dma_addr(subdrv->drm_dev, handle, |
| filp); |
| else |
| g2d_userptr_put_dma_addr(subdrv->drm_dev, handle, |
| false); |
| |
| buf_info->reg_types[i] = REG_TYPE_NONE; |
| buf_info->handles[reg_type] = 0; |
| 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->subdrv.drm_dev; |
| struct g2d_runqueue_node *runqueue_node = g2d->runqueue_node; |
| struct drm_exynos_pending_g2d_event *e; |
| struct timeval 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); |
| |
| do_gettimeofday(&now); |
| e->event.tv_sec = now.tv_sec; |
| e->event.tv_usec = now.tv_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 device *dev, |
| 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(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(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(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(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(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(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_file_private *file_priv = file->driver_priv; |
| struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv; |
| struct device *dev; |
| struct g2d_data *g2d; |
| struct drm_exynos_g2d_get_ver *ver = data; |
| |
| if (!g2d_priv) |
| return -ENODEV; |
| |
| dev = g2d_priv->dev; |
| if (!dev) |
| return -ENODEV; |
| |
| g2d = dev_get_drvdata(dev); |
| if (!g2d) |
| return -EFAULT; |
| |
| 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_g2d_private *g2d_priv = file_priv->g2d_priv; |
| struct device *dev; |
| struct g2d_data *g2d; |
| 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; |
| |
| if (!g2d_priv) |
| return -ENODEV; |
| |
| dev = g2d_priv->dev; |
| if (!dev) |
| return -ENODEV; |
| |
| g2d = dev_get_drvdata(dev); |
| if (!g2d) |
| return -EFAULT; |
| |
| node = g2d_get_cmdlist(g2d); |
| if (!node) |
| return -ENOMEM; |
| |
| 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 size of cmdlist: last 2 is about G2D_BITBLT_START */ |
| size = cmdlist->last + req->cmd_nr * 2 + req->cmd_buf_nr * 2 + 2; |
| if (size > G2D_CMDLIST_DATA_NUM) { |
| dev_err(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(dev, 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(dev, 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(g2d_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_g2d_private *g2d_priv = file_priv->g2d_priv; |
| struct device *dev; |
| struct g2d_data *g2d; |
| struct drm_exynos_g2d_exec *req = data; |
| struct g2d_runqueue_node *runqueue_node; |
| struct list_head *run_cmdlist; |
| struct list_head *event_list; |
| |
| if (!g2d_priv) |
| return -ENODEV; |
| |
| dev = g2d_priv->dev; |
| if (!dev) |
| return -ENODEV; |
| |
| g2d = dev_get_drvdata(dev); |
| if (!g2d) |
| return -EFAULT; |
| |
| runqueue_node = kmem_cache_alloc(g2d->runqueue_slab, GFP_KERNEL); |
| if (!runqueue_node) { |
| dev_err(dev, "failed to allocate memory\n"); |
| 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(&g2d_priv->inuse_cmdlist, run_cmdlist); |
| list_splice_init(&g2d_priv->event_list, event_list); |
| |
| if (list_empty(run_cmdlist)) { |
| dev_err(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; |
| } |
| |
| static int g2d_subdrv_probe(struct drm_device *drm_dev, struct device *dev) |
| { |
| struct g2d_data *g2d; |
| int ret; |
| |
| g2d = dev_get_drvdata(dev); |
| if (!g2d) |
| return -EFAULT; |
| |
| /* allocate dma-aware cmdlist buffer. */ |
| ret = g2d_init_cmdlist(g2d); |
| if (ret < 0) { |
| dev_err(dev, "cmdlist init failed\n"); |
| return ret; |
| } |
| |
| ret = drm_iommu_attach_device(drm_dev, dev); |
| if (ret < 0) { |
| dev_err(dev, "failed to enable iommu.\n"); |
| g2d_fini_cmdlist(g2d); |
| } |
| |
| return ret; |
| |
| } |
| |
| static void g2d_subdrv_remove(struct drm_device *drm_dev, struct device *dev) |
| { |
| drm_iommu_detach_device(drm_dev, dev); |
| } |
| |
| static int g2d_open(struct drm_device *drm_dev, struct device *dev, |
| struct drm_file *file) |
| { |
| struct drm_exynos_file_private *file_priv = file->driver_priv; |
| struct exynos_drm_g2d_private *g2d_priv; |
| |
| g2d_priv = kzalloc(sizeof(*g2d_priv), GFP_KERNEL); |
| if (!g2d_priv) |
| return -ENOMEM; |
| |
| g2d_priv->dev = dev; |
| file_priv->g2d_priv = g2d_priv; |
| |
| INIT_LIST_HEAD(&g2d_priv->inuse_cmdlist); |
| INIT_LIST_HEAD(&g2d_priv->event_list); |
| INIT_LIST_HEAD(&g2d_priv->userptr_list); |
| |
| return 0; |
| } |
| |
| static void g2d_close(struct drm_device *drm_dev, struct device *dev, |
| struct drm_file *file) |
| { |
| struct drm_exynos_file_private *file_priv = file->driver_priv; |
| struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv; |
| struct g2d_data *g2d; |
| struct g2d_cmdlist_node *node, *n; |
| |
| if (!dev) |
| return; |
| |
| g2d = dev_get_drvdata(dev); |
| if (!g2d) |
| return; |
| |
| /* 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, &g2d_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(drm_dev, g2d, file); |
| |
| kfree(file_priv->g2d_priv); |
| } |
| |
| static int g2d_probe(struct platform_device *pdev) |
| { |
| struct device *dev = &pdev->dev; |
| struct resource *res; |
| struct g2d_data *g2d; |
| struct exynos_drm_subdrv *subdrv; |
| 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) { |
| dev_err(dev, "failed to get irq\n"); |
| 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); |
| |
| subdrv = &g2d->subdrv; |
| subdrv->dev = dev; |
| subdrv->probe = g2d_subdrv_probe; |
| subdrv->remove = g2d_subdrv_remove; |
| subdrv->open = g2d_open; |
| subdrv->close = g2d_close; |
| |
| ret = exynos_drm_subdrv_register(subdrv); |
| if (ret < 0) { |
| dev_err(dev, "failed to register drm g2d device\n"); |
| goto err_put_clk; |
| } |
| |
| dev_info(dev, "The Exynos G2D (ver %d.%d) successfully probed.\n", |
| G2D_HW_MAJOR_VER, G2D_HW_MINOR_VER); |
| |
| 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); |
| |
| /* Suspend operation and wait for engine idle. */ |
| set_bit(G2D_BIT_SUSPEND_RUNQUEUE, &g2d->flags); |
| g2d_wait_finish(g2d, NULL); |
| |
| cancel_work_sync(&g2d->runqueue_work); |
| exynos_drm_subdrv_unregister(&g2d->subdrv); |
| |
| /* 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 = "s5p-g2d", |
| .owner = THIS_MODULE, |
| .pm = &g2d_pm_ops, |
| .of_match_table = exynos_g2d_match, |
| }, |
| }; |