/*
* Copyright © 2007 David Airlie
*
* 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 (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Authors:
* David Airlie
*/
#include <linux/fb.h>
#include <linux/pci.h>
#include <linux/pm_runtime.h>
#include <linux/vga_switcheroo.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_drv.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_framebuffer.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include "radeon.h"
static void radeon_fbdev_destroy_pinned_object(struct drm_gem_object *gobj)
{
struct radeon_bo *rbo = gem_to_radeon_bo(gobj);
int ret;
ret = radeon_bo_reserve(rbo, false);
if (likely(ret == 0)) {
radeon_bo_kunmap(rbo);
radeon_bo_unpin(rbo);
radeon_bo_unreserve(rbo);
}
drm_gem_object_put(gobj);
}
static int radeon_fbdev_create_pinned_object(struct drm_fb_helper *fb_helper,
struct drm_mode_fb_cmd2 *mode_cmd,
struct drm_gem_object **gobj_p)
{
const struct drm_format_info *info;
struct radeon_device *rdev = fb_helper->dev->dev_private;
struct drm_gem_object *gobj = NULL;
struct radeon_bo *rbo = NULL;
bool fb_tiled = false; /* useful for testing */
u32 tiling_flags = 0;
int ret;
int aligned_size, size;
int height = mode_cmd->height;
u32 cpp;
info = drm_get_format_info(rdev_to_drm(rdev), mode_cmd);
cpp = info->cpp[0];
/* need to align pitch with crtc limits */
mode_cmd->pitches[0] = radeon_align_pitch(rdev, mode_cmd->width, cpp,
fb_tiled);
if (rdev->family >= CHIP_R600)
height = ALIGN(mode_cmd->height, 8);
size = mode_cmd->pitches[0] * height;
aligned_size = ALIGN(size, PAGE_SIZE);
ret = radeon_gem_object_create(rdev, aligned_size, 0,
RADEON_GEM_DOMAIN_VRAM,
0, true, &gobj);
if (ret) {
pr_err("failed to allocate framebuffer (%d)\n", aligned_size);
return -ENOMEM;
}
rbo = gem_to_radeon_bo(gobj);
if (fb_tiled)
tiling_flags = RADEON_TILING_MACRO;
#ifdef __BIG_ENDIAN
switch (cpp) {
case 4:
tiling_flags |= RADEON_TILING_SWAP_32BIT;
break;
case 2:
tiling_flags |= RADEON_TILING_SWAP_16BIT;
break;
default:
break;
}
#endif
if (tiling_flags) {
ret = radeon_bo_set_tiling_flags(rbo,
tiling_flags | RADEON_TILING_SURFACE,
mode_cmd->pitches[0]);
if (ret)
dev_err(rdev->dev, "FB failed to set tiling flags\n");
}
ret = radeon_bo_reserve(rbo, false);
if (unlikely(ret != 0))
goto err_radeon_fbdev_destroy_pinned_object;
/* Only 27 bit offset for legacy CRTC */
ret = radeon_bo_pin_restricted(rbo, RADEON_GEM_DOMAIN_VRAM,
ASIC_IS_AVIVO(rdev) ? 0 : 1 << 27,
NULL);
if (ret) {
radeon_bo_unreserve(rbo);
goto err_radeon_fbdev_destroy_pinned_object;
}
if (fb_tiled)
radeon_bo_check_tiling(rbo, 0, 0);
ret = radeon_bo_kmap(rbo, NULL);
radeon_bo_unreserve(rbo);
if (ret)
goto err_radeon_fbdev_destroy_pinned_object;
*gobj_p = gobj;
return 0;
err_radeon_fbdev_destroy_pinned_object:
radeon_fbdev_destroy_pinned_object(gobj);
*gobj_p = NULL;
return ret;
}
/*
* Fbdev ops and struct fb_ops
*/
static int radeon_fbdev_fb_open(struct fb_info *info, int user)
{
struct drm_fb_helper *fb_helper = info->par;
struct radeon_device *rdev = fb_helper->dev->dev_private;
int ret;
ret = pm_runtime_get_sync(rdev_to_drm(rdev)->dev);
if (ret < 0 && ret != -EACCES)
goto err_pm_runtime_mark_last_busy;
return 0;
err_pm_runtime_mark_last_busy:
pm_runtime_mark_last_busy(rdev_to_drm(rdev)->dev);
pm_runtime_put_autosuspend(rdev_to_drm(rdev)->dev);
return ret;
}
static int radeon_fbdev_fb_release(struct fb_info *info, int user)
{
struct drm_fb_helper *fb_helper = info->par;
struct radeon_device *rdev = fb_helper->dev->dev_private;
pm_runtime_mark_last_busy(rdev_to_drm(rdev)->dev);
pm_runtime_put_autosuspend(rdev_to_drm(rdev)->dev);
return 0;
}
static void radeon_fbdev_fb_destroy(struct fb_info *info)
{
struct drm_fb_helper *fb_helper = info->par;
struct drm_framebuffer *fb = fb_helper->fb;
struct drm_gem_object *gobj = drm_gem_fb_get_obj(fb, 0);
drm_fb_helper_fini(fb_helper);
drm_framebuffer_unregister_private(fb);
drm_framebuffer_cleanup(fb);
kfree(fb);
radeon_fbdev_destroy_pinned_object(gobj);
drm_client_release(&fb_helper->client);
drm_fb_helper_unprepare(fb_helper);
kfree(fb_helper);
}
static const struct fb_ops radeon_fbdev_fb_ops = {
.owner = THIS_MODULE,
.fb_open = radeon_fbdev_fb_open,
.fb_release = radeon_fbdev_fb_release,
FB_DEFAULT_IOMEM_OPS,
DRM_FB_HELPER_DEFAULT_OPS,
.fb_destroy = radeon_fbdev_fb_destroy,
};
/*
* Fbdev helpers and struct drm_fb_helper_funcs
*/
static int radeon_fbdev_fb_helper_fb_probe(struct drm_fb_helper *fb_helper,
struct drm_fb_helper_surface_size *sizes)
{
struct radeon_device *rdev = fb_helper->dev->dev_private;
struct drm_mode_fb_cmd2 mode_cmd = { };
struct fb_info *info;
struct drm_gem_object *gobj;
struct radeon_bo *rbo;
struct drm_framebuffer *fb;
int ret;
unsigned long tmp;
mode_cmd.width = sizes->surface_width;
mode_cmd.height = sizes->surface_height;
/* avivo can't scanout real 24bpp */
if ((sizes->surface_bpp == 24) && ASIC_IS_AVIVO(rdev))
sizes->surface_bpp = 32;
mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
sizes->surface_depth);
ret = radeon_fbdev_create_pinned_object(fb_helper, &mode_cmd, &gobj);
if (ret) {
DRM_ERROR("failed to create fbcon object %d\n", ret);
return ret;
}
rbo = gem_to_radeon_bo(gobj);
fb = kzalloc(sizeof(*fb), GFP_KERNEL);
if (!fb) {
ret = -ENOMEM;
goto err_radeon_fbdev_destroy_pinned_object;
}
ret = radeon_framebuffer_init(rdev_to_drm(rdev), fb, &mode_cmd, gobj);
if (ret) {
DRM_ERROR("failed to initialize framebuffer %d\n", ret);
goto err_kfree;
}
/* setup helper */
fb_helper->fb = fb;
/* okay we have an object now allocate the framebuffer */
info = drm_fb_helper_alloc_info(fb_helper);
if (IS_ERR(info)) {
ret = PTR_ERR(info);
goto err_drm_framebuffer_unregister_private;
}
info->fbops = &radeon_fbdev_fb_ops;
/* radeon resume is fragile and needs a vt switch to help it along */
info->skip_vt_switch = false;
drm_fb_helper_fill_info(info, fb_helper, sizes);
tmp = radeon_bo_gpu_offset(rbo) - rdev->mc.vram_start;
info->fix.smem_start = rdev->mc.aper_base + tmp;
info->fix.smem_len = radeon_bo_size(rbo);
info->screen_base = (__force void __iomem *)rbo->kptr;
info->screen_size = radeon_bo_size(rbo);
memset_io(info->screen_base, 0, info->screen_size);
/* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
DRM_INFO("fb mappable at 0x%lX\n", info->fix.smem_start);
DRM_INFO("vram apper at 0x%lX\n", (unsigned long)rdev->mc.aper_base);
DRM_INFO("size %lu\n", (unsigned long)radeon_bo_size(rbo));
DRM_INFO("fb depth is %d\n", fb->format->depth);
DRM_INFO(" pitch is %d\n", fb->pitches[0]);
return 0;
err_drm_framebuffer_unregister_private:
fb_helper->fb = NULL;
drm_framebuffer_unregister_private(fb);
drm_framebuffer_cleanup(fb);
err_kfree:
kfree(fb);
err_radeon_fbdev_destroy_pinned_object:
radeon_fbdev_destroy_pinned_object(gobj);
return ret;
}
static const struct drm_fb_helper_funcs radeon_fbdev_fb_helper_funcs = {
.fb_probe = radeon_fbdev_fb_helper_fb_probe,
};
/*
* Fbdev client and struct drm_client_funcs
*/
static void radeon_fbdev_client_unregister(struct drm_client_dev *client)
{
struct drm_fb_helper *fb_helper = drm_fb_helper_from_client(client);
struct drm_device *dev = fb_helper->dev;
struct radeon_device *rdev = dev->dev_private;
if (fb_helper->info) {
vga_switcheroo_client_fb_set(rdev->pdev, NULL);
drm_helper_force_disable_all(dev);
drm_fb_helper_unregister_info(fb_helper);
} else {
drm_client_release(&fb_helper->client);
drm_fb_helper_unprepare(fb_helper);
kfree(fb_helper);
}
}
static int radeon_fbdev_client_restore(struct drm_client_dev *client)
{
drm_fb_helper_lastclose(client->dev);
vga_switcheroo_process_delayed_switch();
return 0;
}
static int radeon_fbdev_client_hotplug(struct drm_client_dev *client)
{
struct drm_fb_helper *fb_helper = drm_fb_helper_from_client(client);
struct drm_device *dev = client->dev;
struct radeon_device *rdev = dev->dev_private;
int ret;
if (dev->fb_helper)
return drm_fb_helper_hotplug_event(dev->fb_helper);
ret = drm_fb_helper_init(dev, fb_helper);
if (ret)
goto err_drm_err;
if (!drm_drv_uses_atomic_modeset(dev))
drm_helper_disable_unused_functions(dev);
ret = drm_fb_helper_initial_config(fb_helper);
if (ret)
goto err_drm_fb_helper_fini;
vga_switcheroo_client_fb_set(rdev->pdev, fb_helper->info);
return 0;
err_drm_fb_helper_fini:
drm_fb_helper_fini(fb_helper);
err_drm_err:
drm_err(dev, "Failed to setup radeon fbdev emulation (ret=%d)\n", ret);
return ret;
}
static const struct drm_client_funcs radeon_fbdev_client_funcs = {
.owner = THIS_MODULE,
.unregister = radeon_fbdev_client_unregister,
.restore = radeon_fbdev_client_restore,
.hotplug = radeon_fbdev_client_hotplug,
};
void radeon_fbdev_setup(struct radeon_device *rdev)
{
struct drm_fb_helper *fb_helper;
int bpp_sel = 32;
int ret;
if (rdev->mc.real_vram_size <= (8 * 1024 * 1024))
bpp_sel = 8;
else if (ASIC_IS_RN50(rdev) || rdev->mc.real_vram_size <= (32 * 1024 * 1024))
bpp_sel = 16;
fb_helper = kzalloc(sizeof(*fb_helper), GFP_KERNEL);
if (!fb_helper)
return;
drm_fb_helper_prepare(rdev_to_drm(rdev), fb_helper, bpp_sel, &radeon_fbdev_fb_helper_funcs);
ret = drm_client_init(rdev_to_drm(rdev), &fb_helper->client, "radeon-fbdev",
&radeon_fbdev_client_funcs);
if (ret) {
drm_err(rdev_to_drm(rdev), "Failed to register client: %d\n", ret);
goto err_drm_client_init;
}
drm_client_register(&fb_helper->client);
return;
err_drm_client_init:
drm_fb_helper_unprepare(fb_helper);
kfree(fb_helper);
}
void radeon_fbdev_set_suspend(struct radeon_device *rdev, int state)
{
if (rdev_to_drm(rdev)->fb_helper)
drm_fb_helper_set_suspend(rdev_to_drm(rdev)->fb_helper, state);
}
bool radeon_fbdev_robj_is_fb(struct radeon_device *rdev, struct radeon_bo *robj)
{
struct drm_fb_helper *fb_helper = rdev_to_drm(rdev)->fb_helper;
struct drm_gem_object *gobj;
if (!fb_helper)
return false;
gobj = drm_gem_fb_get_obj(fb_helper->fb, 0);
if (!gobj)
return false;
if (gobj != &robj->tbo.base)
return false;
return true;
}
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