From: Arto Merilainen amerilainen@nvidia.com
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: Arto Merilainen amerilainen@nvidia.com Signed-off-by: Terje Bergstrom tbergstrom@nvidia.com --- drivers/gpu/host1x/Makefile | 1 + drivers/gpu/host1x/drm/Kconfig | 8 +- drivers/gpu/host1x/drm/dc.c | 23 +-- drivers/gpu/host1x/drm/drm.c | 17 +- drivers/gpu/host1x/drm/drm.h | 18 ++- drivers/gpu/host1x/drm/fb.c | 336 +++++++++++++++++++++++++++++++++++++++- drivers/gpu/host1x/drm/gem.c | 270 ++++++++++++++++++++++++++++++++ drivers/gpu/host1x/drm/gem.h | 59 +++++++ 8 files changed, 698 insertions(+), 34 deletions(-) create mode 100644 drivers/gpu/host1x/drm/gem.c create mode 100644 drivers/gpu/host1x/drm/gem.h
diff --git a/drivers/gpu/host1x/Makefile b/drivers/gpu/host1x/Makefile index 9a6fc76..3768dbc 100644 --- a/drivers/gpu/host1x/Makefile +++ b/drivers/gpu/host1x/Makefile @@ -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 diff --git a/drivers/gpu/host1x/drm/Kconfig b/drivers/gpu/host1x/drm/Kconfig index 7db9b3a..f743540 100644 --- a/drivers/gpu/host1x/drm/Kconfig +++ b/drivers/gpu/host1x/drm/Kconfig @@ -2,11 +2,9 @@ config DRM_TEGRA bool "NVIDIA Tegra DRM" depends on DRM && OF && ARCH_TEGRA 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.
diff --git a/drivers/gpu/host1x/drm/dc.c b/drivers/gpu/host1x/drm/dc.c index 29a79b6..85ea616 100644 --- a/drivers/gpu/host1x/drm/dc.c +++ b/drivers/gpu/host1x/drm/dc.c @@ -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) diff --git a/drivers/gpu/host1x/drm/drm.c b/drivers/gpu/host1x/drm/drm.c index 901f0b4..c4e45c1 100644 --- a/drivers/gpu/host1x/drm/drm.c +++ b/drivers/gpu/host1x/drm/drm.c @@ -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), diff --git a/drivers/gpu/host1x/drm/drm.h b/drivers/gpu/host1x/drm/drm.h index 0b8738f..3864a39 100644 --- a/drivers/gpu/host1x/drm/drm.h +++ b/drivers/gpu/host1x/drm/drm.h @@ -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;
diff --git a/drivers/gpu/host1x/drm/fb.c b/drivers/gpu/host1x/drm/fb.c index 6ed885a..953e418 100644 --- a/drivers/gpu/host1x/drm/fb.c +++ b/drivers/gpu/host1x/drm/fb.c @@ -1,30 +1,341 @@ /* - * 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 "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 void tegra_drm_fb_output_poll_changed(struct drm_device *drm) +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); + + 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 +345,7 @@ 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 +359,14 @@ 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); + } } diff --git a/drivers/gpu/host1x/drm/gem.c b/drivers/gpu/host1x/drm/gem.c new file mode 100644 index 0000000..c5e9a9b --- /dev/null +++ b/drivers/gpu/host1x/drm/gem.c @@ -0,0 +1,270 @@ +/* + * 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); +} diff --git a/drivers/gpu/host1x/drm/gem.h b/drivers/gpu/host1x/drm/gem.h new file mode 100644 index 0000000..34de2b4 --- /dev/null +++ b/drivers/gpu/host1x/drm/gem.h @@ -0,0 +1,59 @@ +/* + * 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