Commit de2ba664 authored by Arto Merilainen's avatar Arto Merilainen Committed by Thierry Reding

gpu: host1x: drm: Add memory manager and fb

This patch introduces a memory manager for tegra drm and moves
existing parts to use it. As cma framebuffer helpers can no more
be used, this patch adds also a separate framebuffer driver for
tegra.
Signed-off-by: default avatarArto Merilainen <amerilainen@nvidia.com>
Signed-off-by: default avatarTerje Bergstrom <tbergstrom@nvidia.com>
Reviewed-by: default avatarThierry Reding <thierry.reding@avionic-design.de>
Tested-by: default avatarThierry Reding <thierry.reding@avionic-design.de>
Tested-by: default avatarErik Faye-Lund <kusmabite@gmail.com>
Signed-off-by: default avatarThierry Reding <thierry.reding@avionic-design.de>
parent 692e6d7b
......@@ -15,4 +15,5 @@ ccflags-$(CONFIG_DRM_TEGRA_DEBUG) += -DDEBUG
host1x-$(CONFIG_DRM_TEGRA) += drm/drm.o drm/fb.o drm/dc.o
host1x-$(CONFIG_DRM_TEGRA) += drm/output.o drm/rgb.o drm/hdmi.o
host1x-$(CONFIG_DRM_TEGRA) += drm/gem.o
obj-$(CONFIG_TEGRA_HOST1X) += host1x.o
......@@ -2,11 +2,9 @@ config DRM_TEGRA
bool "NVIDIA Tegra DRM"
depends on DRM && OF
select DRM_KMS_HELPER
select DRM_GEM_CMA_HELPER
select DRM_KMS_CMA_HELPER
select FB_CFB_FILLRECT
select FB_CFB_COPYAREA
select FB_CFB_IMAGEBLIT
select FB_SYS_FILLRECT
select FB_SYS_COPYAREA
select FB_SYS_IMAGEBLIT
help
Choose this option if you have an NVIDIA Tegra SoC.
......
......@@ -14,9 +14,10 @@
#include <linux/platform_device.h>
#include <linux/clk/tegra.h>
#include "drm.h"
#include "dc.h"
#include "host1x_client.h"
#include "dc.h"
#include "drm.h"
#include "gem.h"
struct tegra_plane {
struct drm_plane base;
......@@ -52,9 +53,9 @@ static int tegra_plane_update(struct drm_plane *plane, struct drm_crtc *crtc,
window.bits_per_pixel = fb->bits_per_pixel;
for (i = 0; i < drm_format_num_planes(fb->pixel_format); i++) {
struct drm_gem_cma_object *gem = drm_fb_cma_get_gem_obj(fb, i);
struct tegra_bo *bo = tegra_fb_get_plane(fb, i);
window.base[i] = gem->paddr + fb->offsets[i];
window.base[i] = bo->paddr + fb->offsets[i];
/*
* Tegra doesn't support different strides for U and V planes
......@@ -137,7 +138,7 @@ static int tegra_dc_add_planes(struct drm_device *drm, struct tegra_dc *dc)
static int tegra_dc_set_base(struct tegra_dc *dc, int x, int y,
struct drm_framebuffer *fb)
{
struct drm_gem_cma_object *gem = drm_fb_cma_get_gem_obj(fb, 0);
struct tegra_bo *bo = tegra_fb_get_plane(fb, 0);
unsigned long value;
tegra_dc_writel(dc, WINDOW_A_SELECT, DC_CMD_DISPLAY_WINDOW_HEADER);
......@@ -145,7 +146,7 @@ static int tegra_dc_set_base(struct tegra_dc *dc, int x, int y,
value = fb->offsets[0] + y * fb->pitches[0] +
x * fb->bits_per_pixel / 8;
tegra_dc_writel(dc, gem->paddr + value, DC_WINBUF_START_ADDR);
tegra_dc_writel(dc, bo->paddr + value, DC_WINBUF_START_ADDR);
tegra_dc_writel(dc, fb->pitches[0], DC_WIN_LINE_STRIDE);
value = GENERAL_UPDATE | WIN_A_UPDATE;
......@@ -187,20 +188,20 @@ static void tegra_dc_finish_page_flip(struct tegra_dc *dc)
{
struct drm_device *drm = dc->base.dev;
struct drm_crtc *crtc = &dc->base;
struct drm_gem_cma_object *gem;
unsigned long flags, base;
struct tegra_bo *bo;
if (!dc->event)
return;
gem = drm_fb_cma_get_gem_obj(crtc->fb, 0);
bo = tegra_fb_get_plane(crtc->fb, 0);
/* check if new start address has been latched */
tegra_dc_writel(dc, READ_MUX, DC_CMD_STATE_ACCESS);
base = tegra_dc_readl(dc, DC_WINBUF_START_ADDR);
tegra_dc_writel(dc, 0, DC_CMD_STATE_ACCESS);
if (base == gem->paddr + crtc->fb->offsets[0]) {
if (base == bo->paddr + crtc->fb->offsets[0]) {
spin_lock_irqsave(&drm->event_lock, flags);
drm_send_vblank_event(drm, dc->pipe, dc->event);
drm_vblank_put(drm, dc->pipe);
......@@ -570,7 +571,7 @@ static int tegra_crtc_mode_set(struct drm_crtc *crtc,
struct drm_display_mode *adjusted,
int x, int y, struct drm_framebuffer *old_fb)
{
struct drm_gem_cma_object *gem = drm_fb_cma_get_gem_obj(crtc->fb, 0);
struct tegra_bo *bo = tegra_fb_get_plane(crtc->fb, 0);
struct tegra_dc *dc = to_tegra_dc(crtc);
struct tegra_dc_window window;
unsigned long div, value;
......@@ -617,7 +618,7 @@ static int tegra_crtc_mode_set(struct drm_crtc *crtc,
window.format = tegra_dc_format(crtc->fb->pixel_format);
window.bits_per_pixel = crtc->fb->bits_per_pixel;
window.stride[0] = crtc->fb->pitches[0];
window.base[0] = gem->paddr;
window.base[0] = bo->paddr;
err = tegra_dc_setup_window(dc, 0, &window);
if (err < 0)
......
......@@ -15,7 +15,10 @@
#include <asm/dma-iommu.h>
#include "host1x_client.h"
#include "dev.h"
#include "drm.h"
#include "gem.h"
#include "syncpt.h"
#define DRIVER_NAME "tegra"
#define DRIVER_DESC "NVIDIA Tegra graphics"
......@@ -281,7 +284,7 @@ static void tegra_drm_lastclose(struct drm_device *drm)
{
struct host1x_drm *host1x = drm->dev_private;
drm_fbdev_cma_restore_mode(host1x->fbdev);
tegra_fbdev_restore_mode(host1x->fbdev);
}
static struct drm_ioctl_desc tegra_drm_ioctls[] = {
......@@ -292,7 +295,7 @@ static const struct file_operations tegra_drm_fops = {
.open = drm_open,
.release = drm_release,
.unlocked_ioctl = drm_ioctl,
.mmap = drm_gem_cma_mmap,
.mmap = tegra_drm_mmap,
.poll = drm_poll,
.fasync = drm_fasync,
.read = drm_read,
......@@ -408,11 +411,11 @@ struct drm_driver tegra_drm_driver = {
.debugfs_cleanup = tegra_debugfs_cleanup,
#endif
.gem_free_object = drm_gem_cma_free_object,
.gem_vm_ops = &drm_gem_cma_vm_ops,
.dumb_create = drm_gem_cma_dumb_create,
.dumb_map_offset = drm_gem_cma_dumb_map_offset,
.dumb_destroy = drm_gem_cma_dumb_destroy,
.gem_free_object = tegra_bo_free_object,
.gem_vm_ops = &tegra_bo_vm_ops,
.dumb_create = tegra_bo_dumb_create,
.dumb_map_offset = tegra_bo_dumb_map_offset,
.dumb_destroy = tegra_bo_dumb_destroy,
.ioctls = tegra_drm_ioctls,
.num_ioctls = ARRAY_SIZE(tegra_drm_ioctls),
......
......@@ -14,10 +14,19 @@
#include <drm/drm_crtc_helper.h>
#include <drm/drm_edid.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_fb_cma_helper.h>
#include <drm/drm_fixed.h>
struct tegra_fb {
struct drm_framebuffer base;
struct tegra_bo **planes;
unsigned int num_planes;
};
struct tegra_fbdev {
struct drm_fb_helper base;
struct tegra_fb *fb;
};
struct host1x_drm {
struct drm_device *drm;
struct device *dev;
......@@ -33,7 +42,7 @@ struct host1x_drm {
struct mutex clients_lock;
struct list_head clients;
struct drm_fbdev_cma *fbdev;
struct tegra_fbdev *fbdev;
};
struct host1x_client;
......@@ -226,8 +235,11 @@ extern int tegra_output_init(struct drm_device *drm, struct tegra_output *output
extern int tegra_output_exit(struct tegra_output *output);
/* from fb.c */
struct tegra_bo *tegra_fb_get_plane(struct drm_framebuffer *framebuffer,
unsigned int index);
extern int tegra_drm_fb_init(struct drm_device *drm);
extern void tegra_drm_fb_exit(struct drm_device *drm);
extern void tegra_fbdev_restore_mode(struct tegra_fbdev *fbdev);
extern struct drm_driver tegra_drm_driver;
......
/*
* Copyright (C) 2012 Avionic Design GmbH
* Copyright (C) 2012-2013 Avionic Design GmbH
* Copyright (C) 2012 NVIDIA CORPORATION. All rights reserved.
*
* Based on the KMS/FB CMA helpers
* Copyright (C) 2012 Analog Device Inc.
*
* 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 Foundation.
*/
#include <linux/module.h>
#include "drm.h"
#include "gem.h"
static inline struct tegra_fb *to_tegra_fb(struct drm_framebuffer *fb)
{
return container_of(fb, struct tegra_fb, base);
}
static inline struct tegra_fbdev *to_tegra_fbdev(struct drm_fb_helper *helper)
{
return container_of(helper, struct tegra_fbdev, base);
}
struct tegra_bo *tegra_fb_get_plane(struct drm_framebuffer *framebuffer,
unsigned int index)
{
struct tegra_fb *fb = to_tegra_fb(framebuffer);
if (index >= drm_format_num_planes(framebuffer->pixel_format))
return NULL;
return fb->planes[index];
}
static void tegra_fb_destroy(struct drm_framebuffer *framebuffer)
{
struct tegra_fb *fb = to_tegra_fb(framebuffer);
unsigned int i;
for (i = 0; i < fb->num_planes; i++) {
struct tegra_bo *bo = fb->planes[i];
if (bo)
drm_gem_object_unreference_unlocked(&bo->gem);
}
drm_framebuffer_cleanup(framebuffer);
kfree(fb->planes);
kfree(fb);
}
static int tegra_fb_create_handle(struct drm_framebuffer *framebuffer,
struct drm_file *file, unsigned int *handle)
{
struct tegra_fb *fb = to_tegra_fb(framebuffer);
return drm_gem_handle_create(file, &fb->planes[0]->gem, handle);
}
static struct drm_framebuffer_funcs tegra_fb_funcs = {
.destroy = tegra_fb_destroy,
.create_handle = tegra_fb_create_handle,
};
static struct tegra_fb *tegra_fb_alloc(struct drm_device *drm,
struct drm_mode_fb_cmd2 *mode_cmd,
struct tegra_bo **planes,
unsigned int num_planes)
{
struct tegra_fb *fb;
unsigned int i;
int err;
fb = kzalloc(sizeof(*fb), GFP_KERNEL);
if (!fb)
return ERR_PTR(-ENOMEM);
fb->planes = kzalloc(num_planes * sizeof(*planes), GFP_KERNEL);
if (!fb->planes)
return ERR_PTR(-ENOMEM);
fb->num_planes = num_planes;
drm_helper_mode_fill_fb_struct(&fb->base, mode_cmd);
for (i = 0; i < fb->num_planes; i++)
fb->planes[i] = planes[i];
err = drm_framebuffer_init(drm, &fb->base, &tegra_fb_funcs);
if (err < 0) {
dev_err(drm->dev, "failed to initialize framebuffer: %d\n",
err);
kfree(fb->planes);
kfree(fb);
return ERR_PTR(err);
}
return fb;
}
static struct drm_framebuffer *tegra_fb_create(struct drm_device *drm,
struct drm_file *file,
struct drm_mode_fb_cmd2 *cmd)
{
unsigned int hsub, vsub, i;
struct tegra_bo *planes[4];
struct drm_gem_object *gem;
struct tegra_fb *fb;
int err;
hsub = drm_format_horz_chroma_subsampling(cmd->pixel_format);
vsub = drm_format_vert_chroma_subsampling(cmd->pixel_format);
for (i = 0; i < drm_format_num_planes(cmd->pixel_format); i++) {
unsigned int width = cmd->width / (i ? hsub : 1);
unsigned int height = cmd->height / (i ? vsub : 1);
unsigned int size, bpp;
gem = drm_gem_object_lookup(drm, file, cmd->handles[i]);
if (!gem) {
err = -ENXIO;
goto unreference;
}
bpp = drm_format_plane_cpp(cmd->pixel_format, i);
size = (height - 1) * cmd->pitches[i] +
width * bpp + cmd->offsets[i];
if (gem->size < size) {
err = -EINVAL;
goto unreference;
}
planes[i] = to_tegra_bo(gem);
}
fb = tegra_fb_alloc(drm, cmd, planes, i);
if (IS_ERR(fb)) {
err = PTR_ERR(fb);
goto unreference;
}
return &fb->base;
unreference:
while (i--)
drm_gem_object_unreference_unlocked(&planes[i]->gem);
static void tegra_drm_fb_output_poll_changed(struct drm_device *drm)
return ERR_PTR(err);
}
static struct fb_ops tegra_fb_ops = {
.owner = THIS_MODULE,
.fb_fillrect = sys_fillrect,
.fb_copyarea = sys_copyarea,
.fb_imageblit = sys_imageblit,
.fb_check_var = drm_fb_helper_check_var,
.fb_set_par = drm_fb_helper_set_par,
.fb_blank = drm_fb_helper_blank,
.fb_pan_display = drm_fb_helper_pan_display,
.fb_setcmap = drm_fb_helper_setcmap,
};
static int tegra_fbdev_probe(struct drm_fb_helper *helper,
struct drm_fb_helper_surface_size *sizes)
{
struct tegra_fbdev *fbdev = to_tegra_fbdev(helper);
struct drm_device *drm = helper->dev;
struct drm_mode_fb_cmd2 cmd = { 0 };
unsigned int bytes_per_pixel;
struct drm_framebuffer *fb;
unsigned long offset;
struct fb_info *info;
struct tegra_bo *bo;
size_t size;
int err;
bytes_per_pixel = DIV_ROUND_UP(sizes->surface_bpp, 8);
cmd.width = sizes->surface_width;
cmd.height = sizes->surface_height;
cmd.pitches[0] = sizes->surface_width * bytes_per_pixel;
cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
sizes->surface_depth);
size = cmd.pitches[0] * cmd.height;
bo = tegra_bo_create(drm, size);
if (IS_ERR(bo))
return PTR_ERR(bo);
info = framebuffer_alloc(0, drm->dev);
if (!info) {
dev_err(drm->dev, "failed to allocate framebuffer info\n");
tegra_bo_free_object(&bo->gem);
return -ENOMEM;
}
fbdev->fb = tegra_fb_alloc(drm, &cmd, &bo, 1);
if (IS_ERR(fbdev->fb)) {
dev_err(drm->dev, "failed to allocate DRM framebuffer\n");
err = PTR_ERR(fbdev->fb);
goto release;
}
fb = &fbdev->fb->base;
helper->fb = fb;
helper->fbdev = info;
info->par = helper;
info->flags = FBINFO_FLAG_DEFAULT;
info->fbops = &tegra_fb_ops;
err = fb_alloc_cmap(&info->cmap, 256, 0);
if (err < 0) {
dev_err(drm->dev, "failed to allocate color map: %d\n", err);
goto destroy;
}
drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
drm_fb_helper_fill_var(info, helper, fb->width, fb->height);
offset = info->var.xoffset * bytes_per_pixel +
info->var.yoffset * fb->pitches[0];
drm->mode_config.fb_base = (resource_size_t)bo->paddr;
info->screen_base = bo->vaddr + offset;
info->screen_size = size;
info->fix.smem_start = (unsigned long)(bo->paddr + offset);
info->fix.smem_len = size;
return 0;
destroy:
drm_framebuffer_unregister_private(fb);
tegra_fb_destroy(fb);
release:
framebuffer_release(info);
return err;
}
static struct drm_fb_helper_funcs tegra_fb_helper_funcs = {
.fb_probe = tegra_fbdev_probe,
};
static struct tegra_fbdev *tegra_fbdev_create(struct drm_device *drm,
unsigned int preferred_bpp,
unsigned int num_crtc,
unsigned int max_connectors)
{
struct drm_fb_helper *helper;
struct tegra_fbdev *fbdev;
int err;
fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
if (!fbdev) {
dev_err(drm->dev, "failed to allocate DRM fbdev\n");
return ERR_PTR(-ENOMEM);
}
fbdev->base.funcs = &tegra_fb_helper_funcs;
helper = &fbdev->base;
err = drm_fb_helper_init(drm, &fbdev->base, num_crtc, max_connectors);
if (err < 0) {
dev_err(drm->dev, "failed to initialize DRM FB helper\n");
goto free;
}
err = drm_fb_helper_single_add_all_connectors(&fbdev->base);
if (err < 0) {
dev_err(drm->dev, "failed to add connectors\n");
goto fini;
}
drm_helper_disable_unused_functions(drm);
err = drm_fb_helper_initial_config(&fbdev->base, preferred_bpp);
if (err < 0) {
dev_err(drm->dev, "failed to set initial configuration\n");
goto fini;
}
return fbdev;
fini:
drm_fb_helper_fini(&fbdev->base);
free:
kfree(fbdev);
return ERR_PTR(err);
}
static void tegra_fbdev_free(struct tegra_fbdev *fbdev)
{
struct fb_info *info = fbdev->base.fbdev;
if (info) {
int err;
err = unregister_framebuffer(info);
if (err < 0)
DRM_DEBUG_KMS("failed to unregister framebuffer\n");
if (info->cmap.len)
fb_dealloc_cmap(&info->cmap);
framebuffer_release(info);
}
if (fbdev->fb) {
drm_framebuffer_unregister_private(&fbdev->fb->base);
tegra_fb_destroy(&fbdev->fb->base);
}
drm_fb_helper_fini(&fbdev->base);
kfree(fbdev);
}
static void tegra_fb_output_poll_changed(struct drm_device *drm)
{
struct host1x_drm *host1x = drm->dev_private;
drm_fbdev_cma_hotplug_event(host1x->fbdev);
if (host1x->fbdev)
drm_fb_helper_hotplug_event(&host1x->fbdev->base);
}
static const struct drm_mode_config_funcs tegra_drm_mode_funcs = {
.fb_create = drm_fb_cma_create,
.output_poll_changed = tegra_drm_fb_output_poll_changed,
.fb_create = tegra_fb_create,
.output_poll_changed = tegra_fb_output_poll_changed,
};
int tegra_drm_fb_init(struct drm_device *drm)
{
struct host1x_drm *host1x = drm->dev_private;
struct drm_fbdev_cma *fbdev;
struct tegra_fbdev *fbdev;
drm->mode_config.min_width = 0;
drm->mode_config.min_height = 0;
......@@ -34,7 +347,7 @@ int tegra_drm_fb_init(struct drm_device *drm)
drm->mode_config.funcs = &tegra_drm_mode_funcs;
fbdev = drm_fbdev_cma_init(drm, 32, drm->mode_config.num_crtc,
fbdev = tegra_fbdev_create(drm, 32, drm->mode_config.num_crtc,
drm->mode_config.num_connector);
if (IS_ERR(fbdev))
return PTR_ERR(fbdev);
......@@ -48,5 +361,14 @@ void tegra_drm_fb_exit(struct drm_device *drm)
{
struct host1x_drm *host1x = drm->dev_private;
drm_fbdev_cma_fini(host1x->fbdev);
tegra_fbdev_free(host1x->fbdev);
}
void tegra_fbdev_restore_mode(struct tegra_fbdev *fbdev)
{
if (fbdev) {
drm_modeset_lock_all(fbdev->base.dev);
drm_fb_helper_restore_fbdev_mode(&fbdev->base);
drm_modeset_unlock_all(fbdev->base.dev);
}
}
/*
* NVIDIA Tegra DRM GEM helper functions
*
* Copyright (C) 2012 Sascha Hauer, Pengutronix
* Copyright (C) 2013 NVIDIA CORPORATION, All rights reserved.
*
* Based on the GEM/CMA helpers
*
* Copyright (c) 2011 Samsung Electronics Co., Ltd.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/mutex.h>
#include <linux/export.h>
#include <linux/dma-mapping.h>
#include <drm/drmP.h>
#include <drm/drm.h>
#include "gem.h"
static inline struct tegra_bo *host1x_to_drm_bo(struct host1x_bo *bo)
{
return container_of(bo, struct tegra_bo, base);
}
static void tegra_bo_put(struct host1x_bo *bo)
{
struct tegra_bo *obj = host1x_to_drm_bo(bo);
struct drm_device *drm = obj->gem.dev;
mutex_lock(&drm->struct_mutex);
drm_gem_object_unreference(&obj->gem);
mutex_unlock(&drm->struct_mutex);
}
static dma_addr_t tegra_bo_pin(struct host1x_bo *bo, struct sg_table **sgt)
{
struct tegra_bo *obj = host1x_to_drm_bo(bo);
return obj->paddr;
}
static void tegra_bo_unpin(struct host1x_bo *bo, struct sg_table *sgt)
{
}
static void *tegra_bo_mmap(struct host1x_bo *bo)
{
struct tegra_bo *obj = host1x_to_drm_bo(bo);
return obj->vaddr;
}
static void tegra_bo_munmap(struct host1x_bo *bo, void *addr)
{
}
static void *tegra_bo_kmap(struct host1x_bo *bo, unsigned int page)
{
struct tegra_bo *obj = host1x_to_drm_bo(bo);
return obj->vaddr + page * PAGE_SIZE;
}
static void tegra_bo_kunmap(struct host1x_bo *bo, unsigned int page,
void *addr)
{
}
static struct host1x_bo *tegra_bo_get(struct host1x_bo *bo)
{
struct tegra_bo *obj = host1x_to_drm_bo(bo);
struct drm_device *drm = obj->gem.dev;
mutex_lock(&drm->struct_mutex);
drm_gem_object_reference(&obj->gem);
mutex_unlock(&drm->struct_mutex);
return bo;
}
const struct host1x_bo_ops tegra_bo_ops = {
.get = tegra_bo_get,
.put = tegra_bo_put,
.pin = tegra_bo_pin,
.unpin = tegra_bo_unpin,
.mmap = tegra_bo_mmap,
.munmap = tegra_bo_munmap,
.kmap = tegra_bo_kmap,
.kunmap = tegra_bo_kunmap,
};
static void tegra_bo_destroy(struct drm_device *drm, struct tegra_bo *bo)
{
dma_free_writecombine(drm->dev, bo->gem.size, bo->vaddr, bo->paddr);
}
unsigned int tegra_bo_get_mmap_offset(struct tegra_bo *bo)
{
return (unsigned int)bo->gem.map_list.hash.key << PAGE_SHIFT;
}
struct tegra_bo *tegra_bo_create(struct drm_device *drm, unsigned int size)
{
struct tegra_bo *bo;
int err;
bo = kzalloc(sizeof(*bo), GFP_KERNEL);
if (!bo)
return ERR_PTR(-ENOMEM);
host1x_bo_init(&bo->base, &tegra_bo_ops);
size = round_up(size, PAGE_SIZE);
bo->vaddr = dma_alloc_writecombine(drm->dev, size, &bo->paddr,
GFP_KERNEL | __GFP_NOWARN);
if (!bo->vaddr) {
dev_err(drm->dev, "failed to allocate buffer with size %u\n",
size);
err = -ENOMEM;
goto err_dma;
}
err = drm_gem_object_init(drm, &bo->gem, size);
if (err)
goto err_init;
err = drm_gem_create_mmap_offset(&bo->gem);
if (err)
goto err_mmap;
return bo;
err_mmap:
drm_gem_object_release(&bo->gem);
err_init:
tegra_bo_destroy(drm, bo);
err_dma:
kfree(bo);
return ERR_PTR(err);
}
struct tegra_bo *tegra_bo_create_with_handle(struct drm_file *file,
struct drm_device *drm,
unsigned int size,
unsigned int *handle)
{
struct tegra_bo *bo;
int ret;
bo = tegra_bo_create(drm, size);
if (IS_ERR(bo))
return bo;
ret = drm_gem_handle_create(file, &bo->gem, handle);
if (ret)
goto err;
drm_gem_object_unreference_unlocked(&bo->gem);
return bo;
err:
tegra_bo_free_object(&bo->gem);
return ERR_PTR(ret);
}
void tegra_bo_free_object(struct drm_gem_object *gem)
{
struct tegra_bo *bo = to_tegra_bo(gem);
if (gem->map_list.map)
drm_gem_free_mmap_offset(gem);
drm_gem_object_release(gem);
tegra_bo_destroy(gem->dev, bo);
kfree(bo);
}
int tegra_bo_dumb_create(struct drm_file *file, struct drm_device *drm,
struct drm_mode_create_dumb *args)
{
int min_pitch = DIV_ROUND_UP(args->width * args->bpp, 8);
struct tegra_bo *bo;
if (args->pitch < min_pitch)
args->pitch = min_pitch;
if (args->size < args->pitch * args->height)
args->size = args->pitch * args->height;
bo = tegra_bo_create_with_handle(file, drm, args->size,
&args->handle);
if (IS_ERR(bo))
return PTR_ERR(bo);
return 0;
}
int tegra_bo_dumb_map_offset(struct drm_file *file, struct drm_device *drm,
uint32_t handle, uint64_t *offset)
{
struct drm_gem_object *gem;
struct tegra_bo *bo;
mutex_lock(&drm->struct_mutex);
gem = drm_gem_object_lookup(drm, file, handle);
if (!gem) {
dev_err(drm->dev, "failed to lookup GEM object\n");
mutex_unlock(&drm->struct_mutex);
return -EINVAL;
}
bo = to_tegra_bo(gem);
*offset = tegra_bo_get_mmap_offset(bo);
drm_gem_object_unreference(gem);
mutex_unlock(&drm->struct_mutex);
return 0;
}
const struct vm_operations_struct tegra_bo_vm_ops = {
.open = drm_gem_vm_open,
.close = drm_gem_vm_close,
};
int tegra_drm_mmap(struct file *file, struct vm_area_struct *vma)
{
struct drm_gem_object *gem;
struct tegra_bo *bo;
int ret;
ret = drm_gem_mmap(file, vma);
if (ret)
return ret;
gem = vma->vm_private_data;
bo = to_tegra_bo(gem);
ret = remap_pfn_range(vma, vma->vm_start, bo->paddr >> PAGE_SHIFT,
vma->vm_end - vma->vm_start, vma->vm_page_prot);
if (ret)
drm_gem_vm_close(vma);
return ret;
}
int tegra_bo_dumb_destroy(struct drm_file *file, struct drm_device *drm,
unsigned int handle)
{
return drm_gem_handle_delete(file, handle);
}
/*
* Tegra host1x GEM implementation
*
* Copyright (c) 2012-2013, NVIDIA Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __HOST1X_GEM_H
#define __HOST1X_GEM_H
#include <drm/drm.h>
#include <drm/drmP.h>
#include "host1x_bo.h"
struct tegra_bo {
struct drm_gem_object gem;
struct host1x_bo base;
dma_addr_t paddr;
void *vaddr;
};
static inline struct tegra_bo *to_tegra_bo(struct drm_gem_object *gem)
{
return container_of(gem, struct tegra_bo, gem);
}
extern const struct host1x_bo_ops tegra_bo_ops;
struct tegra_bo *tegra_bo_create(struct drm_device *drm, unsigned int size);
struct tegra_bo *tegra_bo_create_with_handle(struct drm_file *file,
struct drm_device *drm,
unsigned int size,
unsigned int *handle);
void tegra_bo_free_object(struct drm_gem_object *gem);
unsigned int tegra_bo_get_mmap_offset(struct tegra_bo *bo);
int tegra_bo_dumb_create(struct drm_file *file, struct drm_device *drm,
struct drm_mode_create_dumb *args);
int tegra_bo_dumb_map_offset(struct drm_file *file, struct drm_device *drm,
uint32_t handle, uint64_t *offset);
int tegra_bo_dumb_destroy(struct drm_file *file, struct drm_device *drm,
unsigned int handle);
int tegra_drm_mmap(struct file *file, struct vm_area_struct *vma);
extern const struct vm_operations_struct tegra_bo_vm_ops;
#endif
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