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OpenCloudOS-Kernel/drivers/gpu/drm/exynos/exynos_drm_ipp.c

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/*
* Copyright (C) 2017 Samsung Electronics Co.Ltd
* Authors:
* Marek Szyprowski <m.szyprowski@samsung.com>
*
* Exynos DRM Image Post Processing (IPP) related functions
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*/
#include <linux/uaccess.h>
#include <drm/drm_file.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_mode.h>
#include <drm/exynos_drm.h>
#include "exynos_drm_drv.h"
#include "exynos_drm_gem.h"
#include "exynos_drm_ipp.h"
static int num_ipp;
static LIST_HEAD(ipp_list);
/**
* exynos_drm_ipp_register - Register a new picture processor hardware module
* @dev: DRM device
* @ipp: ipp module to init
* @funcs: callbacks for the new ipp object
* @caps: bitmask of ipp capabilities (%DRM_EXYNOS_IPP_CAP_*)
* @formats: array of supported formats
* @num_formats: size of the supported formats array
* @name: name (for debugging purposes)
*
* Initializes a ipp module.
*
* Returns:
* Zero on success, error code on failure.
*/
int exynos_drm_ipp_register(struct device *dev, struct exynos_drm_ipp *ipp,
const struct exynos_drm_ipp_funcs *funcs, unsigned int caps,
const struct exynos_drm_ipp_formats *formats,
unsigned int num_formats, const char *name)
{
WARN_ON(!ipp);
WARN_ON(!funcs);
WARN_ON(!formats);
WARN_ON(!num_formats);
spin_lock_init(&ipp->lock);
INIT_LIST_HEAD(&ipp->todo_list);
init_waitqueue_head(&ipp->done_wq);
ipp->dev = dev;
ipp->funcs = funcs;
ipp->capabilities = caps;
ipp->name = name;
ipp->formats = formats;
ipp->num_formats = num_formats;
/* ipp_list modification is serialized by component framework */
list_add_tail(&ipp->head, &ipp_list);
ipp->id = num_ipp++;
DRM_DEV_DEBUG_DRIVER(dev, "Registered ipp %d\n", ipp->id);
return 0;
}
/**
* exynos_drm_ipp_unregister - Unregister the picture processor module
* @dev: DRM device
* @ipp: ipp module
*/
void exynos_drm_ipp_unregister(struct device *dev,
struct exynos_drm_ipp *ipp)
{
WARN_ON(ipp->task);
WARN_ON(!list_empty(&ipp->todo_list));
list_del(&ipp->head);
}
/**
* exynos_drm_ipp_get_res_ioctl - enumerate all ipp modules
* @dev: DRM device
* @data: ioctl data
* @file_priv: DRM file info
*
* Construct a list of ipp ids.
*
* Called by the user via ioctl.
*
* Returns:
* Zero on success, negative errno on failure.
*/
int exynos_drm_ipp_get_res_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_exynos_ioctl_ipp_get_res *resp = data;
struct exynos_drm_ipp *ipp;
uint32_t __user *ipp_ptr = (uint32_t __user *)
(unsigned long)resp->ipp_id_ptr;
unsigned int count = num_ipp, copied = 0;
/*
* This ioctl is called twice, once to determine how much space is
* needed, and the 2nd time to fill it.
*/
if (count && resp->count_ipps >= count) {
list_for_each_entry(ipp, &ipp_list, head) {
if (put_user(ipp->id, ipp_ptr + copied))
return -EFAULT;
copied++;
}
}
resp->count_ipps = count;
return 0;
}
static inline struct exynos_drm_ipp *__ipp_get(uint32_t id)
{
struct exynos_drm_ipp *ipp;
list_for_each_entry(ipp, &ipp_list, head)
if (ipp->id == id)
return ipp;
return NULL;
}
/**
* exynos_drm_ipp_get_caps_ioctl - get ipp module capabilities and formats
* @dev: DRM device
* @data: ioctl data
* @file_priv: DRM file info
*
* Construct a structure describing ipp module capabilities.
*
* Called by the user via ioctl.
*
* Returns:
* Zero on success, negative errno on failure.
*/
int exynos_drm_ipp_get_caps_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_exynos_ioctl_ipp_get_caps *resp = data;
void __user *ptr = (void __user *)(unsigned long)resp->formats_ptr;
struct exynos_drm_ipp *ipp;
int i;
ipp = __ipp_get(resp->ipp_id);
if (!ipp)
return -ENOENT;
resp->ipp_id = ipp->id;
resp->capabilities = ipp->capabilities;
/*
* This ioctl is called twice, once to determine how much space is
* needed, and the 2nd time to fill it.
*/
if (resp->formats_count >= ipp->num_formats) {
for (i = 0; i < ipp->num_formats; i++) {
struct drm_exynos_ipp_format tmp = {
.fourcc = ipp->formats[i].fourcc,
.type = ipp->formats[i].type,
.modifier = ipp->formats[i].modifier,
};
if (copy_to_user(ptr, &tmp, sizeof(tmp)))
return -EFAULT;
ptr += sizeof(tmp);
}
}
resp->formats_count = ipp->num_formats;
return 0;
}
static inline const struct exynos_drm_ipp_formats *__ipp_format_get(
struct exynos_drm_ipp *ipp, uint32_t fourcc,
uint64_t mod, unsigned int type)
{
int i;
for (i = 0; i < ipp->num_formats; i++) {
if ((ipp->formats[i].type & type) &&
ipp->formats[i].fourcc == fourcc &&
ipp->formats[i].modifier == mod)
return &ipp->formats[i];
}
return NULL;
}
/**
* exynos_drm_ipp_get_limits_ioctl - get ipp module limits
* @dev: DRM device
* @data: ioctl data
* @file_priv: DRM file info
*
* Construct a structure describing ipp module limitations for provided
* picture format.
*
* Called by the user via ioctl.
*
* Returns:
* Zero on success, negative errno on failure.
*/
int exynos_drm_ipp_get_limits_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_exynos_ioctl_ipp_get_limits *resp = data;
void __user *ptr = (void __user *)(unsigned long)resp->limits_ptr;
const struct exynos_drm_ipp_formats *format;
struct exynos_drm_ipp *ipp;
if (resp->type != DRM_EXYNOS_IPP_FORMAT_SOURCE &&
resp->type != DRM_EXYNOS_IPP_FORMAT_DESTINATION)
return -EINVAL;
ipp = __ipp_get(resp->ipp_id);
if (!ipp)
return -ENOENT;
format = __ipp_format_get(ipp, resp->fourcc, resp->modifier,
resp->type);
if (!format)
return -EINVAL;
/*
* This ioctl is called twice, once to determine how much space is
* needed, and the 2nd time to fill it.
*/
if (format->num_limits && resp->limits_count >= format->num_limits)
if (copy_to_user((void __user *)ptr, format->limits,
sizeof(*format->limits) * format->num_limits))
return -EFAULT;
resp->limits_count = format->num_limits;
return 0;
}
struct drm_pending_exynos_ipp_event {
struct drm_pending_event base;
struct drm_exynos_ipp_event event;
};
static inline struct exynos_drm_ipp_task *
exynos_drm_ipp_task_alloc(struct exynos_drm_ipp *ipp)
{
struct exynos_drm_ipp_task *task;
task = kzalloc(sizeof(*task), GFP_KERNEL);
if (!task)
return NULL;
task->dev = ipp->dev;
task->ipp = ipp;
/* some defaults */
task->src.rect.w = task->dst.rect.w = UINT_MAX;
task->src.rect.h = task->dst.rect.h = UINT_MAX;
task->transform.rotation = DRM_MODE_ROTATE_0;
DRM_DEV_DEBUG_DRIVER(task->dev, "Allocated task %pK\n", task);
return task;
}
static const struct exynos_drm_param_map {
unsigned int id;
unsigned int size;
unsigned int offset;
} exynos_drm_ipp_params_maps[] = {
{
DRM_EXYNOS_IPP_TASK_BUFFER | DRM_EXYNOS_IPP_TASK_TYPE_SOURCE,
sizeof(struct drm_exynos_ipp_task_buffer),
offsetof(struct exynos_drm_ipp_task, src.buf),
}, {
DRM_EXYNOS_IPP_TASK_BUFFER |
DRM_EXYNOS_IPP_TASK_TYPE_DESTINATION,
sizeof(struct drm_exynos_ipp_task_buffer),
offsetof(struct exynos_drm_ipp_task, dst.buf),
}, {
DRM_EXYNOS_IPP_TASK_RECTANGLE | DRM_EXYNOS_IPP_TASK_TYPE_SOURCE,
sizeof(struct drm_exynos_ipp_task_rect),
offsetof(struct exynos_drm_ipp_task, src.rect),
}, {
DRM_EXYNOS_IPP_TASK_RECTANGLE |
DRM_EXYNOS_IPP_TASK_TYPE_DESTINATION,
sizeof(struct drm_exynos_ipp_task_rect),
offsetof(struct exynos_drm_ipp_task, dst.rect),
}, {
DRM_EXYNOS_IPP_TASK_TRANSFORM,
sizeof(struct drm_exynos_ipp_task_transform),
offsetof(struct exynos_drm_ipp_task, transform),
}, {
DRM_EXYNOS_IPP_TASK_ALPHA,
sizeof(struct drm_exynos_ipp_task_alpha),
offsetof(struct exynos_drm_ipp_task, alpha),
},
};
static int exynos_drm_ipp_task_set(struct exynos_drm_ipp_task *task,
struct drm_exynos_ioctl_ipp_commit *arg)
{
const struct exynos_drm_param_map *map = exynos_drm_ipp_params_maps;
void __user *params = (void __user *)(unsigned long)arg->params_ptr;
unsigned int size = arg->params_size;
uint32_t id;
int i;
while (size) {
if (get_user(id, (uint32_t __user *)params))
return -EFAULT;
for (i = 0; i < ARRAY_SIZE(exynos_drm_ipp_params_maps); i++)
if (map[i].id == id)
break;
if (i == ARRAY_SIZE(exynos_drm_ipp_params_maps) ||
map[i].size > size)
return -EINVAL;
if (copy_from_user((void *)task + map[i].offset, params,
map[i].size))
return -EFAULT;
params += map[i].size;
size -= map[i].size;
}
DRM_DEV_DEBUG_DRIVER(task->dev,
"Got task %pK configuration from userspace\n",
task);
return 0;
}
static int exynos_drm_ipp_task_setup_buffer(struct exynos_drm_ipp_buffer *buf,
struct drm_file *filp)
{
int ret = 0;
int i;
/* get GEM buffers and check their size */
for (i = 0; i < buf->format->num_planes; i++) {
unsigned int height = (i == 0) ? buf->buf.height :
DIV_ROUND_UP(buf->buf.height, buf->format->vsub);
unsigned long size = height * buf->buf.pitch[i];
struct exynos_drm_gem *gem = exynos_drm_gem_get(filp,
buf->buf.gem_id[i]);
if (!gem) {
ret = -ENOENT;
goto gem_free;
}
buf->exynos_gem[i] = gem;
if (size + buf->buf.offset[i] > buf->exynos_gem[i]->size) {
i++;
ret = -EINVAL;
goto gem_free;
}
buf->dma_addr[i] = buf->exynos_gem[i]->dma_addr +
buf->buf.offset[i];
}
return 0;
gem_free:
while (i--) {
exynos_drm_gem_put(buf->exynos_gem[i]);
buf->exynos_gem[i] = NULL;
}
return ret;
}
static void exynos_drm_ipp_task_release_buf(struct exynos_drm_ipp_buffer *buf)
{
int i;
if (!buf->exynos_gem[0])
return;
for (i = 0; i < buf->format->num_planes; i++)
exynos_drm_gem_put(buf->exynos_gem[i]);
}
static void exynos_drm_ipp_task_free(struct exynos_drm_ipp *ipp,
struct exynos_drm_ipp_task *task)
{
DRM_DEV_DEBUG_DRIVER(task->dev, "Freeing task %pK\n", task);
exynos_drm_ipp_task_release_buf(&task->src);
exynos_drm_ipp_task_release_buf(&task->dst);
if (task->event)
drm_event_cancel_free(ipp->drm_dev, &task->event->base);
kfree(task);
}
struct drm_ipp_limit {
struct drm_exynos_ipp_limit_val h;
struct drm_exynos_ipp_limit_val v;
};
enum drm_ipp_size_id {
IPP_LIMIT_BUFFER, IPP_LIMIT_AREA, IPP_LIMIT_ROTATED, IPP_LIMIT_MAX
};
static const enum drm_exynos_ipp_limit_type limit_id_fallback[IPP_LIMIT_MAX][4] = {
[IPP_LIMIT_BUFFER] = { DRM_EXYNOS_IPP_LIMIT_SIZE_BUFFER },
[IPP_LIMIT_AREA] = { DRM_EXYNOS_IPP_LIMIT_SIZE_AREA,
DRM_EXYNOS_IPP_LIMIT_SIZE_BUFFER },
[IPP_LIMIT_ROTATED] = { DRM_EXYNOS_IPP_LIMIT_SIZE_ROTATED,
DRM_EXYNOS_IPP_LIMIT_SIZE_AREA,
DRM_EXYNOS_IPP_LIMIT_SIZE_BUFFER },
};
static inline void __limit_set_val(unsigned int *ptr, unsigned int val)
{
if (!*ptr)
*ptr = val;
}
static void __get_size_limit(const struct drm_exynos_ipp_limit *limits,
unsigned int num_limits, enum drm_ipp_size_id id,
struct drm_ipp_limit *res)
{
const struct drm_exynos_ipp_limit *l = limits;
int i = 0;
memset(res, 0, sizeof(*res));
for (i = 0; limit_id_fallback[id][i]; i++)
for (l = limits; l - limits < num_limits; l++) {
if (((l->type & DRM_EXYNOS_IPP_LIMIT_TYPE_MASK) !=
DRM_EXYNOS_IPP_LIMIT_TYPE_SIZE) ||
((l->type & DRM_EXYNOS_IPP_LIMIT_SIZE_MASK) !=
limit_id_fallback[id][i]))
continue;
__limit_set_val(&res->h.min, l->h.min);
__limit_set_val(&res->h.max, l->h.max);
__limit_set_val(&res->h.align, l->h.align);
__limit_set_val(&res->v.min, l->v.min);
__limit_set_val(&res->v.max, l->v.max);
__limit_set_val(&res->v.align, l->v.align);
}
}
static inline bool __align_check(unsigned int val, unsigned int align)
{
if (align && (val & (align - 1))) {
DRM_DEBUG_DRIVER("Value %d exceeds HW limits (align %d)\n",
val, align);
return false;
}
return true;
}
static inline bool __size_limit_check(unsigned int val,
struct drm_exynos_ipp_limit_val *l)
{
if ((l->min && val < l->min) || (l->max && val > l->max)) {
DRM_DEBUG_DRIVER("Value %d exceeds HW limits (min %d, max %d)\n",
val, l->min, l->max);
return false;
}
return __align_check(val, l->align);
}
static int exynos_drm_ipp_check_size_limits(struct exynos_drm_ipp_buffer *buf,
const struct drm_exynos_ipp_limit *limits, unsigned int num_limits,
bool rotate, bool swap)
{
enum drm_ipp_size_id id = rotate ? IPP_LIMIT_ROTATED : IPP_LIMIT_AREA;
struct drm_ipp_limit l;
struct drm_exynos_ipp_limit_val *lh = &l.h, *lv = &l.v;
int real_width = buf->buf.pitch[0] / buf->format->cpp[0];
if (!limits)
return 0;
__get_size_limit(limits, num_limits, IPP_LIMIT_BUFFER, &l);
if (!__size_limit_check(real_width, &l.h) ||
!__size_limit_check(buf->buf.height, &l.v))
return -EINVAL;
if (swap) {
lv = &l.h;
lh = &l.v;
}
__get_size_limit(limits, num_limits, id, &l);
if (!__size_limit_check(buf->rect.w, lh) ||
!__align_check(buf->rect.x, lh->align) ||
!__size_limit_check(buf->rect.h, lv) ||
!__align_check(buf->rect.y, lv->align))
return -EINVAL;
return 0;
}
static inline bool __scale_limit_check(unsigned int src, unsigned int dst,
unsigned int min, unsigned int max)
{
if ((max && (dst << 16) > src * max) ||
(min && (dst << 16) < src * min)) {
DRM_DEBUG_DRIVER("Scale from %d to %d exceeds HW limits (ratio min %d.%05d, max %d.%05d)\n",
src, dst,
min >> 16, 100000 * (min & 0xffff) / (1 << 16),
max >> 16, 100000 * (max & 0xffff) / (1 << 16));
return false;
}
return true;
}
static int exynos_drm_ipp_check_scale_limits(
struct drm_exynos_ipp_task_rect *src,
struct drm_exynos_ipp_task_rect *dst,
const struct drm_exynos_ipp_limit *limits,
unsigned int num_limits, bool swap)
{
const struct drm_exynos_ipp_limit_val *lh, *lv;
int dw, dh;
for (; num_limits; limits++, num_limits--)
if ((limits->type & DRM_EXYNOS_IPP_LIMIT_TYPE_MASK) ==
DRM_EXYNOS_IPP_LIMIT_TYPE_SCALE)
break;
if (!num_limits)
return 0;
lh = (!swap) ? &limits->h : &limits->v;
lv = (!swap) ? &limits->v : &limits->h;
dw = (!swap) ? dst->w : dst->h;
dh = (!swap) ? dst->h : dst->w;
if (!__scale_limit_check(src->w, dw, lh->min, lh->max) ||
!__scale_limit_check(src->h, dh, lv->min, lv->max))
return -EINVAL;
return 0;
}
static int exynos_drm_ipp_check_format(struct exynos_drm_ipp_task *task,
struct exynos_drm_ipp_buffer *buf,
struct exynos_drm_ipp_buffer *src,
struct exynos_drm_ipp_buffer *dst,
bool rotate, bool swap)
{
const struct exynos_drm_ipp_formats *fmt;
int ret, i;
fmt = __ipp_format_get(task->ipp, buf->buf.fourcc, buf->buf.modifier,
buf == src ? DRM_EXYNOS_IPP_FORMAT_SOURCE :
DRM_EXYNOS_IPP_FORMAT_DESTINATION);
if (!fmt) {
DRM_DEV_DEBUG_DRIVER(task->dev,
"Task %pK: %s format not supported\n",
task, buf == src ? "src" : "dst");
return -EINVAL;
}
/* basic checks */
if (buf->buf.width == 0 || buf->buf.height == 0)
return -EINVAL;
buf->format = drm_format_info(buf->buf.fourcc);
for (i = 0; i < buf->format->num_planes; i++) {
unsigned int width = (i == 0) ? buf->buf.width :
DIV_ROUND_UP(buf->buf.width, buf->format->hsub);
if (buf->buf.pitch[i] == 0)
buf->buf.pitch[i] = width * buf->format->cpp[i];
if (buf->buf.pitch[i] < width * buf->format->cpp[i])
return -EINVAL;
if (!buf->buf.gem_id[i])
return -ENOENT;
}
/* pitch for additional planes must match */
if (buf->format->num_planes > 2 &&
buf->buf.pitch[1] != buf->buf.pitch[2])
return -EINVAL;
/* check driver limits */
ret = exynos_drm_ipp_check_size_limits(buf, fmt->limits,
fmt->num_limits,
rotate,
buf == dst ? swap : false);
if (ret)
return ret;
ret = exynos_drm_ipp_check_scale_limits(&src->rect, &dst->rect,
fmt->limits,
fmt->num_limits, swap);
return ret;
}
static int exynos_drm_ipp_task_check(struct exynos_drm_ipp_task *task)
{
struct exynos_drm_ipp *ipp = task->ipp;
struct exynos_drm_ipp_buffer *src = &task->src, *dst = &task->dst;
unsigned int rotation = task->transform.rotation;
int ret = 0;
bool swap = drm_rotation_90_or_270(rotation);
bool rotate = (rotation != DRM_MODE_ROTATE_0);
bool scale = false;
DRM_DEV_DEBUG_DRIVER(task->dev, "Checking task %pK\n", task);
if (src->rect.w == UINT_MAX)
src->rect.w = src->buf.width;
if (src->rect.h == UINT_MAX)
src->rect.h = src->buf.height;
if (dst->rect.w == UINT_MAX)
dst->rect.w = dst->buf.width;
if (dst->rect.h == UINT_MAX)
dst->rect.h = dst->buf.height;
if (src->rect.x + src->rect.w > (src->buf.width) ||
src->rect.y + src->rect.h > (src->buf.height) ||
dst->rect.x + dst->rect.w > (dst->buf.width) ||
dst->rect.y + dst->rect.h > (dst->buf.height)) {
DRM_DEV_DEBUG_DRIVER(task->dev,
"Task %pK: defined area is outside provided buffers\n",
task);
return -EINVAL;
}
if ((!swap && (src->rect.w != dst->rect.w ||
src->rect.h != dst->rect.h)) ||
(swap && (src->rect.w != dst->rect.h ||
src->rect.h != dst->rect.w)))
scale = true;
if ((!(ipp->capabilities & DRM_EXYNOS_IPP_CAP_CROP) &&
(src->rect.x || src->rect.y || dst->rect.x || dst->rect.y)) ||
(!(ipp->capabilities & DRM_EXYNOS_IPP_CAP_ROTATE) && rotate) ||
(!(ipp->capabilities & DRM_EXYNOS_IPP_CAP_SCALE) && scale) ||
(!(ipp->capabilities & DRM_EXYNOS_IPP_CAP_CONVERT) &&
src->buf.fourcc != dst->buf.fourcc)) {
DRM_DEV_DEBUG_DRIVER(task->dev, "Task %pK: hw capabilities exceeded\n",
task);
return -EINVAL;
}
ret = exynos_drm_ipp_check_format(task, src, src, dst, rotate, swap);
if (ret)
return ret;
ret = exynos_drm_ipp_check_format(task, dst, src, dst, false, swap);
if (ret)
return ret;
DRM_DEV_DEBUG_DRIVER(ipp->dev, "Task %pK: all checks done.\n",
task);
return ret;
}
static int exynos_drm_ipp_task_setup_buffers(struct exynos_drm_ipp_task *task,
struct drm_file *filp)
{
struct exynos_drm_ipp_buffer *src = &task->src, *dst = &task->dst;
int ret = 0;
DRM_DEV_DEBUG_DRIVER(task->dev, "Setting buffer for task %pK\n",
task);
ret = exynos_drm_ipp_task_setup_buffer(src, filp);
if (ret) {
DRM_DEV_DEBUG_DRIVER(task->dev,
"Task %pK: src buffer setup failed\n",
task);
return ret;
}
ret = exynos_drm_ipp_task_setup_buffer(dst, filp);
if (ret) {
DRM_DEV_DEBUG_DRIVER(task->dev,
"Task %pK: dst buffer setup failed\n",
task);
return ret;
}
DRM_DEV_DEBUG_DRIVER(task->dev, "Task %pK: buffers prepared.\n",
task);
return ret;
}
static int exynos_drm_ipp_event_create(struct exynos_drm_ipp_task *task,
struct drm_file *file_priv, uint64_t user_data)
{
struct drm_pending_exynos_ipp_event *e = NULL;
int ret;
e = kzalloc(sizeof(*e), GFP_KERNEL);
if (!e)
return -ENOMEM;
e->event.base.type = DRM_EXYNOS_IPP_EVENT;
e->event.base.length = sizeof(e->event);
e->event.user_data = user_data;
ret = drm_event_reserve_init(task->ipp->drm_dev, file_priv, &e->base,
&e->event.base);
if (ret)
goto free;
task->event = e;
return 0;
free:
kfree(e);
return ret;
}
static void exynos_drm_ipp_event_send(struct exynos_drm_ipp_task *task)
{
struct timespec64 now;
ktime_get_ts64(&now);
task->event->event.tv_sec = now.tv_sec;
task->event->event.tv_usec = now.tv_nsec / NSEC_PER_USEC;
task->event->event.sequence = atomic_inc_return(&task->ipp->sequence);
drm_send_event(task->ipp->drm_dev, &task->event->base);
}
static int exynos_drm_ipp_task_cleanup(struct exynos_drm_ipp_task *task)
{
int ret = task->ret;
if (ret == 0 && task->event) {
exynos_drm_ipp_event_send(task);
/* ensure event won't be canceled on task free */
task->event = NULL;
}
exynos_drm_ipp_task_free(task->ipp, task);
return ret;
}
static void exynos_drm_ipp_cleanup_work(struct work_struct *work)
{
struct exynos_drm_ipp_task *task = container_of(work,
struct exynos_drm_ipp_task, cleanup_work);
exynos_drm_ipp_task_cleanup(task);
}
static void exynos_drm_ipp_next_task(struct exynos_drm_ipp *ipp);
/**
* exynos_drm_ipp_task_done - finish given task and set return code
* @task: ipp task to finish
* @ret: error code or 0 if operation has been performed successfully
*/
void exynos_drm_ipp_task_done(struct exynos_drm_ipp_task *task, int ret)
{
struct exynos_drm_ipp *ipp = task->ipp;
unsigned long flags;
DRM_DEV_DEBUG_DRIVER(task->dev, "ipp: %d, task %pK done: %d\n",
ipp->id, task, ret);
spin_lock_irqsave(&ipp->lock, flags);
if (ipp->task == task)
ipp->task = NULL;
task->flags |= DRM_EXYNOS_IPP_TASK_DONE;
task->ret = ret;
spin_unlock_irqrestore(&ipp->lock, flags);
exynos_drm_ipp_next_task(ipp);
wake_up(&ipp->done_wq);
if (task->flags & DRM_EXYNOS_IPP_TASK_ASYNC) {
INIT_WORK(&task->cleanup_work, exynos_drm_ipp_cleanup_work);
schedule_work(&task->cleanup_work);
}
}
static void exynos_drm_ipp_next_task(struct exynos_drm_ipp *ipp)
{
struct exynos_drm_ipp_task *task;
unsigned long flags;
int ret;
DRM_DEV_DEBUG_DRIVER(ipp->dev, "ipp: %d, try to run new task\n",
ipp->id);
spin_lock_irqsave(&ipp->lock, flags);
if (ipp->task || list_empty(&ipp->todo_list)) {
spin_unlock_irqrestore(&ipp->lock, flags);
return;
}
task = list_first_entry(&ipp->todo_list, struct exynos_drm_ipp_task,
head);
list_del_init(&task->head);
ipp->task = task;
spin_unlock_irqrestore(&ipp->lock, flags);
DRM_DEV_DEBUG_DRIVER(ipp->dev,
"ipp: %d, selected task %pK to run\n", ipp->id,
task);
ret = ipp->funcs->commit(ipp, task);
if (ret)
exynos_drm_ipp_task_done(task, ret);
}
static void exynos_drm_ipp_schedule_task(struct exynos_drm_ipp *ipp,
struct exynos_drm_ipp_task *task)
{
unsigned long flags;
spin_lock_irqsave(&ipp->lock, flags);
list_add(&task->head, &ipp->todo_list);
spin_unlock_irqrestore(&ipp->lock, flags);
exynos_drm_ipp_next_task(ipp);
}
static void exynos_drm_ipp_task_abort(struct exynos_drm_ipp *ipp,
struct exynos_drm_ipp_task *task)
{
unsigned long flags;
spin_lock_irqsave(&ipp->lock, flags);
if (task->flags & DRM_EXYNOS_IPP_TASK_DONE) {
/* already completed task */
exynos_drm_ipp_task_cleanup(task);
} else if (ipp->task != task) {
/* task has not been scheduled for execution yet */
list_del_init(&task->head);
exynos_drm_ipp_task_cleanup(task);
} else {
/*
* currently processed task, call abort() and perform
* cleanup with async worker
*/
task->flags |= DRM_EXYNOS_IPP_TASK_ASYNC;
spin_unlock_irqrestore(&ipp->lock, flags);
if (ipp->funcs->abort)
ipp->funcs->abort(ipp, task);
return;
}
spin_unlock_irqrestore(&ipp->lock, flags);
}
/**
* exynos_drm_ipp_commit_ioctl - perform image processing operation
* @dev: DRM device
* @data: ioctl data
* @file_priv: DRM file info
*
* Construct a ipp task from the set of properties provided from the user
* and try to schedule it to framebuffer processor hardware.
*
* Called by the user via ioctl.
*
* Returns:
* Zero on success, negative errno on failure.
*/
int exynos_drm_ipp_commit_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_exynos_ioctl_ipp_commit *arg = data;
struct exynos_drm_ipp *ipp;
struct exynos_drm_ipp_task *task;
int ret = 0;
if ((arg->flags & ~DRM_EXYNOS_IPP_FLAGS) || arg->reserved)
return -EINVAL;
/* can't test and expect an event at the same time */
if ((arg->flags & DRM_EXYNOS_IPP_FLAG_TEST_ONLY) &&
(arg->flags & DRM_EXYNOS_IPP_FLAG_EVENT))
return -EINVAL;
ipp = __ipp_get(arg->ipp_id);
if (!ipp)
return -ENOENT;
task = exynos_drm_ipp_task_alloc(ipp);
if (!task)
return -ENOMEM;
ret = exynos_drm_ipp_task_set(task, arg);
if (ret)
goto free;
ret = exynos_drm_ipp_task_check(task);
if (ret)
goto free;
ret = exynos_drm_ipp_task_setup_buffers(task, file_priv);
if (ret || arg->flags & DRM_EXYNOS_IPP_FLAG_TEST_ONLY)
goto free;
if (arg->flags & DRM_EXYNOS_IPP_FLAG_EVENT) {
ret = exynos_drm_ipp_event_create(task, file_priv,
arg->user_data);
if (ret)
goto free;
}
/*
* Queue task for processing on the hardware. task object will be
* then freed after exynos_drm_ipp_task_done()
*/
if (arg->flags & DRM_EXYNOS_IPP_FLAG_NONBLOCK) {
DRM_DEV_DEBUG_DRIVER(ipp->dev,
"ipp: %d, nonblocking processing task %pK\n",
ipp->id, task);
task->flags |= DRM_EXYNOS_IPP_TASK_ASYNC;
exynos_drm_ipp_schedule_task(task->ipp, task);
ret = 0;
} else {
DRM_DEV_DEBUG_DRIVER(ipp->dev, "ipp: %d, processing task %pK\n",
ipp->id, task);
exynos_drm_ipp_schedule_task(ipp, task);
ret = wait_event_interruptible(ipp->done_wq,
task->flags & DRM_EXYNOS_IPP_TASK_DONE);
if (ret)
exynos_drm_ipp_task_abort(ipp, task);
else
ret = exynos_drm_ipp_task_cleanup(task);
}
return ret;
free:
exynos_drm_ipp_task_free(ipp, task);
return ret;
}
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