/* * 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/module.h>#include <linux/slab.h>#include <linux/fb.h> #include <drm/drmP.h>#include <drm/drm_crtc.h>#include <drm/drm_crtc_helper.h>#include <drm/amdgpu_drm.h>#include "amdgpu.h"#include "cikd.h" #include <drm/drm_fb_helper.h> #include <linux/vga_switcheroo.h> /* object hierarchy -   this contains a helper + a amdgpu fb   the helper contains a pointer to amdgpu framebuffer baseclass.*/struct amdgpu_fbdev {	struct drm_fb_helper helper;	struct amdgpu_framebuffer rfb;	struct list_head fbdev_list;	struct amdgpu_device *adev;}; static struct fb_ops amdgpufb_ops = {	.owner = THIS_MODULE,	.fb_check_var = drm_fb_helper_check_var,	.fb_set_par = drm_fb_helper_set_par,	.fb_fillrect = drm_fb_helper_cfb_fillrect,	.fb_copyarea = drm_fb_helper_cfb_copyarea,	.fb_imageblit = drm_fb_helper_cfb_imageblit,	.fb_pan_display = drm_fb_helper_pan_display,	.fb_blank = drm_fb_helper_blank,	.fb_setcmap = drm_fb_helper_setcmap,	.fb_debug_enter = drm_fb_helper_debug_enter,	.fb_debug_leave = drm_fb_helper_debug_leave,};  int amdgpu_align_pitch(struct amdgpu_device *adev, int width, int bpp, bool tiled){	int aligned = width;	int pitch_mask = 0; 	switch (bpp / 8) {	case 1:		pitch_mask = 255;		break;	case 2:		pitch_mask = 127;		break;	case 3:	case 4:		pitch_mask = 63;		break;	} 	aligned += pitch_mask;	aligned &= ~pitch_mask;	return aligned;} static void amdgpufb_destroy_pinned_object(struct drm_gem_object *gobj){	struct amdgpu_bo *rbo = gem_to_amdgpu_bo(gobj);	int ret; 	ret = amdgpu_bo_reserve(rbo, false);	if (likely(ret == 0)) {		amdgpu_bo_kunmap(rbo);		amdgpu_bo_unpin(rbo);		amdgpu_bo_unreserve(rbo);	}	drm_gem_object_unreference_unlocked(gobj);} static int amdgpufb_create_pinned_object(struct amdgpu_fbdev *rfbdev,					 struct drm_mode_fb_cmd2 *mode_cmd,					 struct drm_gem_object **gobj_p){	struct amdgpu_device *adev = rfbdev->adev;	struct drm_gem_object *gobj = NULL;	struct amdgpu_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 bpp, depth; 	drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp); 	/* need to align pitch with crtc limits */	mode_cmd->pitches[0] = amdgpu_align_pitch(adev, mode_cmd->width, bpp,						  fb_tiled) * ((bpp + 1) / 8); 	height = ALIGN(mode_cmd->height, 8);	size = mode_cmd->pitches[0] * height;	aligned_size = ALIGN(size, PAGE_SIZE);	ret = amdgpu_gem_object_create(adev, aligned_size, 0,				       AMDGPU_GEM_DOMAIN_VRAM,				       AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED,				       true, &gobj);	if (ret) {		printk(KERN_ERR "failed to allocate framebuffer (%d)\n",		       aligned_size);		return -ENOMEM;	}	rbo = gem_to_amdgpu_bo(gobj); 	if (fb_tiled)		tiling_flags = AMDGPU_TILING_SET(ARRAY_MODE, GRPH_ARRAY_2D_TILED_THIN1); 	ret = amdgpu_bo_reserve(rbo, false);	if (unlikely(ret != 0))		goto out_unref; 	if (tiling_flags) {		ret = amdgpu_bo_set_tiling_flags(rbo,						 tiling_flags);		if (ret)			dev_err(adev->dev, "FB failed to set tiling flags\n");	}  	ret = amdgpu_bo_pin_restricted(rbo, AMDGPU_GEM_DOMAIN_VRAM, 0, 0, NULL);	if (ret) {		amdgpu_bo_unreserve(rbo);		goto out_unref;	}	ret = amdgpu_bo_kmap(rbo, NULL);	amdgpu_bo_unreserve(rbo);	if (ret) {		goto out_unref;	} 	*gobj_p = gobj;	return 0;out_unref:	amdgpufb_destroy_pinned_object(gobj);	*gobj_p = NULL;	return ret;} static int amdgpufb_create(struct drm_fb_helper *helper,			   struct drm_fb_helper_surface_size *sizes){	struct amdgpu_fbdev *rfbdev = (struct amdgpu_fbdev *)helper;	struct amdgpu_device *adev = rfbdev->adev;	struct fb_info *info;	struct drm_framebuffer *fb = NULL;	struct drm_mode_fb_cmd2 mode_cmd;	struct drm_gem_object *gobj = NULL;	struct amdgpu_bo *rbo = NULL;	int ret;	unsigned long tmp; 	mode_cmd.width = sizes->surface_width;	mode_cmd.height = sizes->surface_height; 	if (sizes->surface_bpp == 24)		sizes->surface_bpp = 32; 	mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,							  sizes->surface_depth); 	ret = amdgpufb_create_pinned_object(rfbdev, &mode_cmd, &gobj);	if (ret) {		DRM_ERROR("failed to create fbcon object %d\n", ret);		return ret;	} 	rbo = gem_to_amdgpu_bo(gobj); 	/* okay we have an object now allocate the framebuffer */	info = drm_fb_helper_alloc_fbi(helper);	if (IS_ERR(info)) {		ret = PTR_ERR(info);		goto out_unref;	} 	info->par = rfbdev;	info->skip_vt_switch = true; 	ret = amdgpu_framebuffer_init(adev->ddev, &rfbdev->rfb, &mode_cmd, gobj);	if (ret) {		DRM_ERROR("failed to initialize framebuffer %d\n", ret);		goto out_destroy_fbi;	} 	fb = &rfbdev->rfb.base; 	/* setup helper */	rfbdev->helper.fb = fb; 	memset_io(rbo->kptr, 0x0, amdgpu_bo_size(rbo)); 	strcpy(info->fix.id, "amdgpudrmfb"); 	drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth); 	info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;	info->fbops = &amdgpufb_ops; 	tmp = amdgpu_bo_gpu_offset(rbo) - adev->mc.vram_start;	info->fix.smem_start = adev->mc.aper_base + tmp;	info->fix.smem_len = amdgpu_bo_size(rbo);	info->screen_base = rbo->kptr;	info->screen_size = amdgpu_bo_size(rbo); 	drm_fb_helper_fill_var(info, &rfbdev->helper, sizes->fb_width, sizes->fb_height); 	/* setup aperture base/size for vesafb takeover */	info->apertures->ranges[0].base = adev->ddev->mode_config.fb_base;	info->apertures->ranges[0].size = adev->mc.aper_size; 	/* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */ 	if (info->screen_base == NULL) {		ret = -ENOSPC;		goto out_destroy_fbi;	} 	DRM_INFO("fb mappable at 0x%lX\n",  info->fix.smem_start);	DRM_INFO("vram apper at 0x%lX\n",  (unsigned long)adev->mc.aper_base);	DRM_INFO("size %lu\n", (unsigned long)amdgpu_bo_size(rbo));	DRM_INFO("fb depth is %d\n", fb->depth);	DRM_INFO("   pitch is %d\n", fb->pitches[0]); 	vga_switcheroo_client_fb_set(adev->ddev->pdev, info);	return 0; out_destroy_fbi:	drm_fb_helper_release_fbi(helper);out_unref:	if (rbo) { 	}	if (fb && ret) {		drm_gem_object_unreference(gobj);		drm_framebuffer_unregister_private(fb);		drm_framebuffer_cleanup(fb);		kfree(fb);	}	return ret;} void amdgpu_fb_output_poll_changed(struct amdgpu_device *adev){	if (adev->mode_info.rfbdev)		drm_fb_helper_hotplug_event(&adev->mode_info.rfbdev->helper);} static int amdgpu_fbdev_destroy(struct drm_device *dev, struct amdgpu_fbdev *rfbdev){	struct amdgpu_framebuffer *rfb = &rfbdev->rfb; 	drm_fb_helper_unregister_fbi(&rfbdev->helper);	drm_fb_helper_release_fbi(&rfbdev->helper); 	if (rfb->obj) {		amdgpufb_destroy_pinned_object(rfb->obj);		rfb->obj = NULL;	}	drm_fb_helper_fini(&rfbdev->helper);	drm_framebuffer_unregister_private(&rfb->base);	drm_framebuffer_cleanup(&rfb->base); 	return 0;} /** Sets the color ramps on behalf of fbcon */static void amdgpu_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,				      u16 blue, int regno){	struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc); 	amdgpu_crtc->lut_r[regno] = red >> 6;	amdgpu_crtc->lut_g[regno] = green >> 6;	amdgpu_crtc->lut_b[regno] = blue >> 6;} /** Gets the color ramps on behalf of fbcon */static void amdgpu_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,				      u16 *blue, int regno){	struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc); 	*red = amdgpu_crtc->lut_r[regno] << 6;	*green = amdgpu_crtc->lut_g[regno] << 6;	*blue = amdgpu_crtc->lut_b[regno] << 6;} static const struct drm_fb_helper_funcs amdgpu_fb_helper_funcs = {	.gamma_set = amdgpu_crtc_fb_gamma_set,	.gamma_get = amdgpu_crtc_fb_gamma_get,	.fb_probe = amdgpufb_create,}; int amdgpu_fbdev_init(struct amdgpu_device *adev){	struct amdgpu_fbdev *rfbdev;	int bpp_sel = 32;	int ret; 	/* don't init fbdev on hw without DCE */	if (!adev->mode_info.mode_config_initialized)		return 0; 	/* select 8 bpp console on low vram cards */	if (adev->mc.real_vram_size <= (32*1024*1024))		bpp_sel = 8; 	rfbdev = kzalloc(sizeof(struct amdgpu_fbdev), GFP_KERNEL);	if (!rfbdev)		return -ENOMEM; 	rfbdev->adev = adev;	adev->mode_info.rfbdev = rfbdev; 	drm_fb_helper_prepare(adev->ddev, &rfbdev->helper,			&amdgpu_fb_helper_funcs); 	ret = drm_fb_helper_init(adev->ddev, &rfbdev->helper,				 adev->mode_info.num_crtc,				 AMDGPUFB_CONN_LIMIT);	if (ret) {		kfree(rfbdev);		return ret;	} 	drm_fb_helper_single_add_all_connectors(&rfbdev->helper); 	/* disable all the possible outputs/crtcs before entering KMS mode */	drm_helper_disable_unused_functions(adev->ddev); 	drm_fb_helper_initial_config(&rfbdev->helper, bpp_sel);	return 0;} void amdgpu_fbdev_fini(struct amdgpu_device *adev){	if (!adev->mode_info.rfbdev)		return; 	amdgpu_fbdev_destroy(adev->ddev, adev->mode_info.rfbdev);	kfree(adev->mode_info.rfbdev);	adev->mode_info.rfbdev = NULL;} void amdgpu_fbdev_set_suspend(struct amdgpu_device *adev, int state){	if (adev->mode_info.rfbdev)		drm_fb_helper_set_suspend(&adev->mode_info.rfbdev->helper,			state);} int amdgpu_fbdev_total_size(struct amdgpu_device *adev){	struct amdgpu_bo *robj;	int size = 0; 	if (!adev->mode_info.rfbdev)		return 0; 	robj = gem_to_amdgpu_bo(adev->mode_info.rfbdev->rfb.obj);	size += amdgpu_bo_size(robj);	return size;} bool amdgpu_fbdev_robj_is_fb(struct amdgpu_device *adev, struct amdgpu_bo *robj){	if (!adev->mode_info.rfbdev)		return false;	if (robj == gem_to_amdgpu_bo(adev->mode_info.rfbdev->rfb.obj))		return true;	return false;} void amdgpu_fbdev_restore_mode(struct amdgpu_device *adev){	struct amdgpu_fbdev *afbdev = adev->mode_info.rfbdev;	struct drm_fb_helper *fb_helper;	int ret; 	if (!afbdev)		return; 	fb_helper = &afbdev->helper; 	ret = drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper);	if (ret)		DRM_DEBUG("failed to restore crtc mode\n");}