linux/drivers/gpu/drm/exynos/exynos_drm_g2d.c

938 lines
23 KiB
C

/*
* 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,
},
};