--- /dev/null
+/*
+ * 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,
+ },
+};
projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / commitdiff