1 files changed, 432 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c
new file mode 100644
index 000000000000..2b1735d2efd6
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c
@@ -0,0 +1,432 @@
+/*
+ * 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 <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 = cfb_fillrect,
+	.fb_copyarea = cfb_copyarea,
+	.fb_imageblit = 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,
+				       0, 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_MACRO;
+
+#ifdef __BIG_ENDIAN
+	switch (bpp) {
+	case 32:
+		tiling_flags |= AMDGPU_TILING_SWAP_32BIT;
+		break;
+	case 16:
+		tiling_flags |= AMDGPU_TILING_SWAP_16BIT;
+	default:
+		break;
+	}
+#endif
+
+	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 | AMDGPU_TILING_SURFACE);
+		if (ret)
+			dev_err(adev->dev, "FB failed to set tiling flags\n");
+	}
+
+
+	ret = amdgpu_bo_pin_restricted(rbo, AMDGPU_GEM_DOMAIN_VRAM, 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;
+	struct device *device = &adev->pdev->dev;
+	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 = framebuffer_alloc(0, device);
+	if (info == NULL) {
+		ret = -ENOMEM;
+		goto out_unref;
+	}
+
+	info->par = rfbdev;
+
+	ret = amdgpu_framebuffer_init(adev->ddev, &rfbdev->rfb, &mode_cmd, gobj);
+	if (ret) {
+		DRM_ERROR("failed to initialize framebuffer %d\n", ret);
+		goto out_unref;
+	}
+
+	fb = &rfbdev->rfb.base;
+
+	/* setup helper */
+	rfbdev->helper.fb = fb;
+	rfbdev->helper.fbdev = info;
+
+	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 = alloc_apertures(1);
+	if (!info->apertures) {
+		ret = -ENOMEM;
+		goto out_unref;
+	}
+	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_unref;
+	}
+
+	ret = fb_alloc_cmap(&info->cmap, 256, 0);
+	if (ret) {
+		ret = -ENOMEM;
+		goto out_unref;
+	}
+
+	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_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 fb_info *info;
+	struct amdgpu_framebuffer *rfb = &rfbdev->rfb;
+
+	if (rfbdev->helper.fbdev) {
+		info = rfbdev->helper.fbdev;
+
+		unregister_framebuffer(info);
+		if (info->cmap.len)
+			fb_dealloc_cmap(&info->cmap);
+		framebuffer_release(info);
+	}
+
+	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)
+		fb_set_suspend(adev->mode_info.rfbdev->helper.fbdev, 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;
+}