diff options
Diffstat (limited to 'drivers/gpu/drm/exynos/exynos_drm_g2d.c')
| -rw-r--r-- | drivers/gpu/drm/exynos/exynos_drm_g2d.c | 937 |
1 files changed, 937 insertions, 0 deletions
diff --git a/drivers/gpu/drm/exynos/exynos_drm_g2d.c b/drivers/gpu/drm/exynos/exynos_drm_g2d.c new file mode 100644 index 000000000000..d2d88f22a037 --- /dev/null +++ b/drivers/gpu/drm/exynos/exynos_drm_g2d.c @@ -0,0 +1,937 @@ +/* + * 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 "drmP.h" +#include "exynos_drm.h" +#include "exynos_drm_drv.h" +#include "exynos_drm_gem.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) + +/* cmdlist data structure */ +struct g2d_cmdlist { + u32 head; + u32 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_gem_node { + struct list_head list; + unsigned int handle; +}; + +struct g2d_cmdlist_node { + struct list_head list; + struct g2d_cmdlist *cmdlist; + unsigned int gem_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 completion complete; + int async; +}; + +struct g2d_data { + struct device *dev; + struct clk *gate_clk; + struct resource *regs_res; + 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; + + /* runqueue*/ + struct g2d_runqueue_node *runqueue_node; + struct list_head runqueue; + struct mutex runqueue_mutex; + struct kmem_cache *runqueue_slab; +}; + +static int g2d_init_cmdlist(struct g2d_data *g2d) +{ + struct device *dev = g2d->dev; + struct g2d_cmdlist_node *node = g2d->cmdlist_node; + int nr; + int ret; + + g2d->cmdlist_pool_virt = dma_alloc_coherent(dev, G2D_CMDLIST_POOL_SIZE, + &g2d->cmdlist_pool, GFP_KERNEL); + if (!g2d->cmdlist_pool_virt) { + dev_err(dev, "failed to allocate dma memory\n"); + return -ENOMEM; + } + + node = kcalloc(G2D_CMDLIST_NUM, 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_coherent(dev, G2D_CMDLIST_POOL_SIZE, g2d->cmdlist_pool_virt, + g2d->cmdlist_pool); + return ret; +} + +static void g2d_fini_cmdlist(struct g2d_data *g2d) +{ + struct device *dev = g2d->dev; + + kfree(g2d->cmdlist_node); + dma_free_coherent(dev, G2D_CMDLIST_POOL_SIZE, g2d->cmdlist_pool_virt, + g2d->cmdlist_pool); +} + +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 int g2d_get_cmdlist_gem(struct drm_device *drm_dev, + struct drm_file *file, + struct g2d_cmdlist_node *node) +{ + struct drm_exynos_file_private *file_priv = file->driver_priv; + struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv; + struct g2d_cmdlist *cmdlist = node->cmdlist; + dma_addr_t *addr; + int offset; + int i; + + for (i = 0; i < node->gem_nr; i++) { + struct g2d_gem_node *gem_node; + + gem_node = kzalloc(sizeof(*gem_node), GFP_KERNEL); + if (!gem_node) { + dev_err(g2d_priv->dev, "failed to allocate gem node\n"); + return -ENOMEM; + } + + offset = cmdlist->last - (i * 2 + 1); + gem_node->handle = cmdlist->data[offset]; + + addr = exynos_drm_gem_get_dma_addr(drm_dev, gem_node->handle, + file); + if (IS_ERR(addr)) { + node->gem_nr = i; + kfree(gem_node); + return PTR_ERR(addr); + } + + cmdlist->data[offset] = *addr; + list_add_tail(&gem_node->list, &g2d_priv->gem_list); + g2d_priv->gem_nr++; + } + + return 0; +} + +static void g2d_put_cmdlist_gem(struct drm_device *drm_dev, + struct drm_file *file, + unsigned int nr) +{ + struct drm_exynos_file_private *file_priv = file->driver_priv; + struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv; + struct g2d_gem_node *node, *n; + + list_for_each_entry_safe_reverse(node, n, &g2d_priv->gem_list, list) { + if (!nr) + break; + + exynos_drm_gem_put_dma_addr(drm_dev, node->handle, file); + list_del_init(&node->list); + kfree(node); + nr--; + } +} + +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) +{ + if (!runqueue_node) + return; + + mutex_lock(&g2d->cmdlist_mutex); + 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 *cmdlist, + int nr, bool for_addr) +{ + int reg_offset; + int index; + int i; + + for (i = 0; i < nr; i++) { + 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; + break; + default: + if (for_addr) + goto err; + break; + } + } + + return 0; + +err: + dev_err(dev, "Bad register offset: 0x%x\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_gem_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, cmdlist, req->cmd_nr, false); + if (ret < 0) + goto err_free_event; + + node->gem_nr = req->cmd_gem_nr; + if (req->cmd_gem_nr) { + struct drm_exynos_g2d_cmd *cmd_gem; + + cmd_gem = (struct drm_exynos_g2d_cmd *)(uint32_t)req->cmd_gem; + + if (copy_from_user(cmdlist->data + cmdlist->last, + (void __user *)cmd_gem, + sizeof(*cmd_gem) * req->cmd_gem_nr)) { + ret = -EFAULT; + goto err_free_event; + } + cmdlist->last += req->cmd_gem_nr * 2; + + ret = g2d_check_reg_offset(dev, cmdlist, req->cmd_gem_nr, true); + if (ret < 0) + goto err_free_event; + + ret = g2d_get_cmdlist_gem(drm_dev, file, node); + 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_put_cmdlist_gem(drm_dev, file, node->gem_nr); +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); + 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_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->gem_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) + list_move_tail(&node->list, &g2d->free_cmdlist); + mutex_unlock(&g2d->cmdlist_mutex); + + g2d_put_cmdlist_gem(drm_dev, file, g2d_priv->gem_nr); + + 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 = kzalloc(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) { + ret = -ENOMEM; + goto err_free_mem; + } + + 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); + + ret = g2d_init_cmdlist(g2d); + if (ret < 0) + goto err_destroy_workqueue; + + g2d->gate_clk = 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_fini_cmdlist; + } + + pm_runtime_enable(dev); + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(dev, "failed to get I/O memory\n"); + ret = -ENOENT; + goto err_put_clk; + } + + g2d->regs_res = request_mem_region(res->start, resource_size(res), + dev_name(dev)); + if (!g2d->regs_res) { + dev_err(dev, "failed to request I/O memory\n"); + ret = -ENOENT; + goto err_put_clk; + } + + g2d->regs = ioremap(res->start, resource_size(res)); + if (!g2d->regs) { + dev_err(dev, "failed to remap I/O memory\n"); + ret = -ENXIO; + goto err_release_res; + } + + g2d->irq = platform_get_irq(pdev, 0); + if (g2d->irq < 0) { + dev_err(dev, "failed to get irq\n"); + ret = g2d->irq; + goto err_unmap_base; + } + + ret = request_irq(g2d->irq, g2d_irq_handler, 0, "drm_g2d", g2d); + if (ret < 0) { + dev_err(dev, "irq request failed\n"); + goto err_unmap_base; + } + + platform_set_drvdata(pdev, g2d); + + subdrv = &g2d->subdrv; + subdrv->dev = dev; + 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_free_irq; + } + + dev_info(dev, "The exynos g2d(ver %d.%d) successfully probed\n", + G2D_HW_MAJOR_VER, G2D_HW_MINOR_VER); + + return 0; + +err_free_irq: + free_irq(g2d->irq, g2d); +err_unmap_base: + iounmap(g2d->regs); +err_release_res: + release_resource(g2d->regs_res); + kfree(g2d->regs_res); +err_put_clk: + pm_runtime_disable(dev); + clk_put(g2d->gate_clk); +err_fini_cmdlist: + g2d_fini_cmdlist(g2d); +err_destroy_workqueue: + destroy_workqueue(g2d->g2d_workq); +err_destroy_slab: + kmem_cache_destroy(g2d->runqueue_slab); +err_free_mem: + kfree(g2d); + 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); + free_irq(g2d->irq, g2d); + + while (g2d->runqueue_node) { + g2d_free_runqueue_node(g2d, g2d->runqueue_node); + g2d->runqueue_node = g2d_get_runqueue_node(g2d); + } + + iounmap(g2d->regs); + release_resource(g2d->regs_res); + kfree(g2d->regs_res); + + pm_runtime_disable(&pdev->dev); + clk_put(g2d->gate_clk); + + g2d_fini_cmdlist(g2d); + destroy_workqueue(g2d->g2d_workq); + kmem_cache_destroy(g2d->runqueue_slab); + kfree(g2d); + + 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_sync(&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 + +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, + }, +}; |