| /* |
| * 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/module.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/dma-attrs.h> |
| |
| #include <drm/drmP.h> |
| #include <drm/exynos_drm.h> |
| #include "exynos_drm_drv.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_PLANE2_BASE_ADDR 0x0318 |
| #define G2D_DST_BASE_ADDR 0x0404 |
| #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_USET_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) |
| |
| #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) |
| |
| #define MAX_BUF_ADDR_NR 6 |
| |
| /* maximum buffer pool size of userptr is 64MB as default */ |
| #define MAX_POOL (64 * 1024 * 1024) |
| |
| enum { |
| BUF_TYPE_GEM = 1, |
| BUF_TYPE_USERPTR, |
| }; |
| |
| /* cmdlist data structure */ |
| struct g2d_cmdlist { |
| u32 head; |
| unsigned long data[G2D_CMDLIST_DATA_NUM]; |
| u32 last; /* last data offset */ |
| }; |
| |
| 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 page **pages; |
| unsigned int npages; |
| struct sg_table *sgt; |
| struct vm_area_struct *vma; |
| atomic_t refcount; |
| bool in_pool; |
| bool out_of_list; |
| }; |
| |
| struct g2d_cmdlist_node { |
| struct list_head list; |
| struct g2d_cmdlist *cmdlist; |
| unsigned int map_nr; |
| unsigned long handles[MAX_BUF_ADDR_NR]; |
| unsigned int obj_type[MAX_BUF_ADDR_NR]; |
| dma_addr_t dma_addr; |
| |
| 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; |
| bool suspended; |
| |
| /* 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; |
| struct dma_attrs 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 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; |
| |
| init_dma_attrs(&g2d->cmdlist_dma_attrs); |
| dma_set_attr(DMA_ATTR_WRITE_COMBINE, &g2d->cmdlist_dma_attrs); |
| |
| g2d->cmdlist_pool_virt = dma_alloc_attrs(subdrv->drm_dev->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++) { |
| node[nr].cmdlist = |
| g2d->cmdlist_pool_virt + nr * G2D_CMDLIST_SIZE; |
| node[nr].dma_addr = |
| g2d->cmdlist_pool + nr * G2D_CMDLIST_SIZE; |
| |
| list_add_tail(&node[nr].list, &g2d->free_cmdlist); |
| } |
| |
| return 0; |
| |
| err: |
| dma_free_attrs(subdrv->drm_dev->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); |
| dma_free_attrs(subdrv->drm_dev->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; |
| |
| 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: |
| exynos_gem_unmap_sgt_from_dma(drm_dev, g2d_userptr->sgt, |
| DMA_BIDIRECTIONAL); |
| |
| exynos_gem_put_pages_to_userptr(g2d_userptr->pages, |
| g2d_userptr->npages, |
| g2d_userptr->vma); |
| |
| if (!g2d_userptr->out_of_list) |
| list_del_init(&g2d_userptr->list); |
| |
| sg_free_table(g2d_userptr->sgt); |
| kfree(g2d_userptr->sgt); |
| g2d_userptr->sgt = NULL; |
| |
| kfree(g2d_userptr->pages); |
| g2d_userptr->pages = NULL; |
| kfree(g2d_userptr); |
| g2d_userptr = NULL; |
| } |
| |
| 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 page **pages; |
| struct sg_table *sgt; |
| struct vm_area_struct *vma; |
| 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) { |
| DRM_ERROR("failed to allocate g2d_userptr.\n"); |
| return ERR_PTR(-ENOMEM); |
| } |
| |
| atomic_set(&g2d_userptr->refcount, 1); |
| |
| start = userptr & PAGE_MASK; |
| offset = userptr & ~PAGE_MASK; |
| end = PAGE_ALIGN(userptr + size); |
| npages = (end - start) >> PAGE_SHIFT; |
| g2d_userptr->npages = npages; |
| |
| pages = kzalloc(npages * sizeof(struct page *), GFP_KERNEL); |
| if (!pages) { |
| DRM_ERROR("failed to allocate pages.\n"); |
| kfree(g2d_userptr); |
| return ERR_PTR(-ENOMEM); |
| } |
| |
| vma = find_vma(current->mm, userptr); |
| if (!vma) { |
| DRM_ERROR("failed to get vm region.\n"); |
| ret = -EFAULT; |
| goto err_free_pages; |
| } |
| |
| if (vma->vm_end < userptr + size) { |
| DRM_ERROR("vma is too small.\n"); |
| ret = -EFAULT; |
| goto err_free_pages; |
| } |
| |
| g2d_userptr->vma = exynos_gem_get_vma(vma); |
| if (!g2d_userptr->vma) { |
| DRM_ERROR("failed to copy vma.\n"); |
| ret = -ENOMEM; |
| goto err_free_pages; |
| } |
| |
| g2d_userptr->size = size; |
| |
| ret = exynos_gem_get_pages_from_userptr(start & PAGE_MASK, |
| npages, pages, vma); |
| if (ret < 0) { |
| DRM_ERROR("failed to get user pages from userptr.\n"); |
| goto err_put_vma; |
| } |
| |
| g2d_userptr->pages = pages; |
| |
| sgt = kzalloc(sizeof *sgt, GFP_KERNEL); |
| if (!sgt) { |
| DRM_ERROR("failed to allocate sg table.\n"); |
| ret = -ENOMEM; |
| goto err_free_userptr; |
| } |
| |
| ret = sg_alloc_table_from_pages(sgt, pages, 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; |
| |
| ret = exynos_gem_map_sgt_with_dma(drm_dev, g2d_userptr->sgt, |
| DMA_BIDIRECTIONAL); |
| if (ret < 0) { |
| DRM_ERROR("failed to map sgt with dma region.\n"); |
| goto err_free_sgt; |
| } |
| |
| 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_free_sgt: |
| sg_free_table(sgt); |
| kfree(sgt); |
| sgt = NULL; |
| |
| err_free_userptr: |
| exynos_gem_put_pages_to_userptr(g2d_userptr->pages, |
| g2d_userptr->npages, |
| g2d_userptr->vma); |
| |
| err_put_vma: |
| exynos_gem_put_vma(g2d_userptr->vma); |
| |
| err_free_pages: |
| kfree(pages); |
| kfree(g2d_userptr); |
| pages = NULL; |
| g2d_userptr = NULL; |
| |
| 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 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; |
| int offset; |
| int i; |
| |
| for (i = 0; i < node->map_nr; i++) { |
| unsigned long handle; |
| dma_addr_t *addr; |
| |
| offset = cmdlist->last - (i * 2 + 1); |
| handle = cmdlist->data[offset]; |
| |
| if (node->obj_type[i] == BUF_TYPE_GEM) { |
| addr = exynos_drm_gem_get_dma_addr(drm_dev, handle, |
| file); |
| if (IS_ERR(addr)) { |
| node->map_nr = i; |
| return -EFAULT; |
| } |
| } else { |
| struct drm_exynos_g2d_userptr g2d_userptr; |
| |
| if (copy_from_user(&g2d_userptr, (void __user *)handle, |
| sizeof(struct drm_exynos_g2d_userptr))) { |
| node->map_nr = i; |
| return -EFAULT; |
| } |
| |
| addr = g2d_userptr_get_dma_addr(drm_dev, |
| g2d_userptr.userptr, |
| g2d_userptr.size, |
| file, |
| &handle); |
| if (IS_ERR(addr)) { |
| node->map_nr = i; |
| return -EFAULT; |
| } |
| } |
| |
| cmdlist->data[offset] = *addr; |
| node->handles[i] = handle; |
| } |
| |
| return 0; |
| } |
| |
| 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; |
| int i; |
| |
| for (i = 0; i < node->map_nr; i++) { |
| unsigned long handle = node->handles[i]; |
| |
| if (node->obj_type[i] == 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); |
| |
| node->handles[i] = 0; |
| } |
| |
| node->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); |
| |
| pm_runtime_get_sync(g2d->dev); |
| clk_enable(g2d->gate_clk); |
| |
| /* interrupt enable */ |
| writel_relaxed(G2D_INTEN_ACF | G2D_INTEN_UCF | G2D_INTEN_GCF, |
| g2d->regs + G2D_INTEN); |
| |
| 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; |
| |
| if (!runqueue_node) |
| return; |
| |
| 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); |
| } |
| |
| static void g2d_exec_runqueue(struct g2d_data *g2d) |
| { |
| g2d->runqueue_node = g2d_get_runqueue_node(g2d); |
| if (g2d->runqueue_node) |
| g2d_dma_start(g2d, g2d->runqueue_node); |
| } |
| |
| static void g2d_runqueue_worker(struct work_struct *work) |
| { |
| struct g2d_data *g2d = container_of(work, struct g2d_data, |
| runqueue_work); |
| |
| |
| mutex_lock(&g2d->runqueue_mutex); |
| clk_disable(g2d->gate_clk); |
| pm_runtime_put_sync(g2d->dev); |
| |
| complete(&g2d->runqueue_node->complete); |
| if (g2d->runqueue_node->async) |
| g2d_free_runqueue_node(g2d, g2d->runqueue_node); |
| |
| if (g2d->suspended) |
| g2d->runqueue_node = NULL; |
| else |
| g2d_exec_runqueue(g2d); |
| 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; |
| unsigned long flags; |
| |
| 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; |
| |
| spin_lock_irqsave(&drm_dev->event_lock, flags); |
| list_move_tail(&e->base.link, &e->base.file_priv->event_list); |
| wake_up_interruptible(&e->base.file_priv->event_wait); |
| spin_unlock_irqrestore(&drm_dev->event_lock, flags); |
| } |
| |
| 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) |
| queue_work(g2d->g2d_workq, &g2d->runqueue_work); |
| |
| return IRQ_HANDLED; |
| } |
| |
| 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++) { |
| index = cmdlist->last - 2 * (i + 1); |
| |
| if (for_addr) { |
| /* check userptr buffer type. */ |
| reg_offset = (cmdlist->data[index] & |
| ~0x7fffffff) >> 31; |
| if (reg_offset) { |
| node->obj_type[i] = BUF_TYPE_USERPTR; |
| cmdlist->data[index] &= ~G2D_BUF_USERPTR; |
| } |
| } |
| |
| 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; |
| |
| if (node->obj_type[i] != BUF_TYPE_USERPTR) |
| node->obj_type[i] = BUF_TYPE_GEM; |
| 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_g2d_get_ver *ver = data; |
| |
| ver->major = G2D_HW_MAJOR_VER; |
| ver->minor = G2D_HW_MINOR_VER; |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(exynos_g2d_get_ver_ioctl); |
| |
| 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 = g2d_priv->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; |
| unsigned long flags; |
| int size; |
| int ret; |
| |
| 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) { |
| spin_lock_irqsave(&drm_dev->event_lock, flags); |
| if (file->event_space < sizeof(e->event)) { |
| spin_unlock_irqrestore(&drm_dev->event_lock, flags); |
| ret = -ENOMEM; |
| goto err; |
| } |
| file->event_space -= sizeof(e->event); |
| spin_unlock_irqrestore(&drm_dev->event_lock, flags); |
| |
| e = kzalloc(sizeof(*node->event), GFP_KERNEL); |
| if (!e) { |
| dev_err(dev, "failed to allocate event\n"); |
| |
| spin_lock_irqsave(&drm_dev->event_lock, flags); |
| file->event_space += sizeof(e->event); |
| spin_unlock_irqrestore(&drm_dev->event_lock, flags); |
| |
| 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; |
| e->base.event = &e->event.base; |
| e->base.file_priv = file; |
| e->base.destroy = (void (*) (struct drm_pending_event *)) kfree; |
| |
| 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; |
| |
| if (node->event) { |
| cmdlist->data[cmdlist->last++] = G2D_DMA_HOLD_CMD; |
| cmdlist->data[cmdlist->last++] = G2D_LIST_HOLD; |
| } |
| |
| /* 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 *)(uint32_t)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->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 *)(uint32_t)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) { |
| spin_lock_irqsave(&drm_dev->event_lock, flags); |
| file->event_space += sizeof(e->event); |
| spin_unlock_irqrestore(&drm_dev->event_lock, flags); |
| kfree(node->event); |
| } |
| err: |
| g2d_put_cmdlist(g2d, node); |
| return ret; |
| } |
| EXPORT_SYMBOL_GPL(exynos_g2d_set_cmdlist_ioctl); |
| |
| 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 = g2d_priv->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 (!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); |
| if (!g2d->runqueue_node) |
| g2d_exec_runqueue(g2d); |
| mutex_unlock(&g2d->runqueue_mutex); |
| |
| if (runqueue_node->async) |
| goto out; |
| |
| wait_for_completion(&runqueue_node->complete); |
| g2d_free_runqueue_node(g2d, runqueue_node); |
| |
| out: |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(exynos_g2d_exec_ioctl); |
| |
| 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; |
| } |
| |
| if (!is_drm_iommu_supported(drm_dev)) |
| return 0; |
| |
| 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) |
| { |
| if (!is_drm_iommu_supported(drm_dev)) |
| return; |
| |
| 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) { |
| dev_err(dev, "failed to allocate g2d private data\n"); |
| 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; |
| |
| mutex_lock(&g2d->cmdlist_mutex); |
| list_for_each_entry_safe(node, n, &g2d_priv->inuse_cmdlist, list) { |
| /* |
| * unmap all gem objects not completed. |
| * |
| * P.S. if current process was terminated forcely then |
| * there may be some commands in inuse_cmdlist so unmap |
| * them. |
| */ |
| 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 __devinit 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(&pdev->dev, sizeof(*g2d), GFP_KERNEL); |
| if (!g2d) { |
| dev_err(dev, "failed to allocate driver data\n"); |
| 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_enable(dev); |
| |
| res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| |
| g2d->regs = devm_request_and_ioremap(&pdev->dev, res); |
| if (!g2d->regs) { |
| dev_err(dev, "failed to remap I/O memory\n"); |
| ret = -ENXIO; |
| 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(&pdev->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 __devexit g2d_remove(struct platform_device *pdev) |
| { |
| struct g2d_data *g2d = platform_get_drvdata(pdev); |
| |
| cancel_work_sync(&g2d->runqueue_work); |
| exynos_drm_subdrv_unregister(&g2d->subdrv); |
| |
| while (g2d->runqueue_node) { |
| g2d_free_runqueue_node(g2d, g2d->runqueue_node); |
| g2d->runqueue_node = g2d_get_runqueue_node(g2d); |
| } |
| |
| 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); |
| |
| mutex_lock(&g2d->runqueue_mutex); |
| g2d->suspended = true; |
| mutex_unlock(&g2d->runqueue_mutex); |
| |
| while (g2d->runqueue_node) |
| /* FIXME: good range? */ |
| usleep_range(500, 1000); |
| |
| flush_work(&g2d->runqueue_work); |
| |
| return 0; |
| } |
| |
| static int g2d_resume(struct device *dev) |
| { |
| struct g2d_data *g2d = dev_get_drvdata(dev); |
| |
| g2d->suspended = false; |
| g2d_exec_runqueue(g2d); |
| |
| return 0; |
| } |
| #endif |
| |
| static SIMPLE_DEV_PM_OPS(g2d_pm_ops, g2d_suspend, g2d_resume); |
| |
| struct platform_driver g2d_driver = { |
| .probe = g2d_probe, |
| .remove = __devexit_p(g2d_remove), |
| .driver = { |
| .name = "s5p-g2d", |
| .owner = THIS_MODULE, |
| .pm = &g2d_pm_ops, |
| }, |
| }; |