1 files changed, 528 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nouveau_fbcon.c b/drivers/gpu/drm/nouveau/nouveau_fbcon.c
new file mode 100644
index 0000000..b035317
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nouveau_fbcon.c
@@ -0,0 +1,528 @@
+/*
+ * 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/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/tty.h>
+#include <linux/sysrq.h>
+#include <linux/delay.h>
+#include <linux/fb.h>
+#include <linux/init.h>
+#include <linux/screen_info.h>
+#include <linux/vga_switcheroo.h>
+#include <linux/console.h>
+
+#include <drm/drmP.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_fb_helper.h>
+
+#include "nouveau_drm.h"
+#include "nouveau_gem.h"
+#include "nouveau_bo.h"
+#include "nouveau_fbcon.h"
+#include "nouveau_chan.h"
+
+#include "nouveau_crtc.h"
+
+#include <core/client.h>
+#include <core/device.h>
+
+#include <subdev/fb.h>
+
+MODULE_PARM_DESC(nofbaccel, "Disable fbcon acceleration");
+static int nouveau_nofbaccel = 0;
+module_param_named(nofbaccel, nouveau_nofbaccel, int, 0400);
+
+static void
+nouveau_fbcon_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
+{
+	struct nouveau_fbdev *fbcon = info->par;
+	struct nouveau_drm *drm = nouveau_drm(fbcon->dev);
+	struct nouveau_device *device = nv_device(drm->device);
+	int ret;
+
+	if (info->state != FBINFO_STATE_RUNNING)
+		return;
+
+	ret = -ENODEV;
+	if (!in_interrupt() && !(info->flags & FBINFO_HWACCEL_DISABLED) &&
+	    mutex_trylock(&drm->client.mutex)) {
+		if (device->card_type < NV_50)
+			ret = nv04_fbcon_fillrect(info, rect);
+		else
+		if (device->card_type < NV_C0)
+			ret = nv50_fbcon_fillrect(info, rect);
+		else
+			ret = nvc0_fbcon_fillrect(info, rect);
+		mutex_unlock(&drm->client.mutex);
+	}
+
+	if (ret == 0)
+		return;
+
+	if (ret != -ENODEV)
+		nouveau_fbcon_gpu_lockup(info);
+	cfb_fillrect(info, rect);
+}
+
+static void
+nouveau_fbcon_copyarea(struct fb_info *info, const struct fb_copyarea *image)
+{
+	struct nouveau_fbdev *fbcon = info->par;
+	struct nouveau_drm *drm = nouveau_drm(fbcon->dev);
+	struct nouveau_device *device = nv_device(drm->device);
+	int ret;
+
+	if (info->state != FBINFO_STATE_RUNNING)
+		return;
+
+	ret = -ENODEV;
+	if (!in_interrupt() && !(info->flags & FBINFO_HWACCEL_DISABLED) &&
+	    mutex_trylock(&drm->client.mutex)) {
+		if (device->card_type < NV_50)
+			ret = nv04_fbcon_copyarea(info, image);
+		else
+		if (device->card_type < NV_C0)
+			ret = nv50_fbcon_copyarea(info, image);
+		else
+			ret = nvc0_fbcon_copyarea(info, image);
+		mutex_unlock(&drm->client.mutex);
+	}
+
+	if (ret == 0)
+		return;
+
+	if (ret != -ENODEV)
+		nouveau_fbcon_gpu_lockup(info);
+	cfb_copyarea(info, image);
+}
+
+static void
+nouveau_fbcon_imageblit(struct fb_info *info, const struct fb_image *image)
+{
+	struct nouveau_fbdev *fbcon = info->par;
+	struct nouveau_drm *drm = nouveau_drm(fbcon->dev);
+	struct nouveau_device *device = nv_device(drm->device);
+	int ret;
+
+	if (info->state != FBINFO_STATE_RUNNING)
+		return;
+
+	ret = -ENODEV;
+	if (!in_interrupt() && !(info->flags & FBINFO_HWACCEL_DISABLED) &&
+	    mutex_trylock(&drm->client.mutex)) {
+		if (device->card_type < NV_50)
+			ret = nv04_fbcon_imageblit(info, image);
+		else
+		if (device->card_type < NV_C0)
+			ret = nv50_fbcon_imageblit(info, image);
+		else
+			ret = nvc0_fbcon_imageblit(info, image);
+		mutex_unlock(&drm->client.mutex);
+	}
+
+	if (ret == 0)
+		return;
+
+	if (ret != -ENODEV)
+		nouveau_fbcon_gpu_lockup(info);
+	cfb_imageblit(info, image);
+}
+
+static int
+nouveau_fbcon_sync(struct fb_info *info)
+{
+	struct nouveau_fbdev *fbcon = info->par;
+	struct nouveau_drm *drm = nouveau_drm(fbcon->dev);
+	struct nouveau_channel *chan = drm->channel;
+	int ret;
+
+	if (!chan || !chan->accel_done || in_interrupt() ||
+	    info->state != FBINFO_STATE_RUNNING ||
+	    info->flags & FBINFO_HWACCEL_DISABLED)
+		return 0;
+
+	if (!mutex_trylock(&drm->client.mutex))
+		return 0;
+
+	ret = nouveau_channel_idle(chan);
+	mutex_unlock(&drm->client.mutex);
+	if (ret) {
+		nouveau_fbcon_gpu_lockup(info);
+		return 0;
+	}
+
+	chan->accel_done = false;
+	return 0;
+}
+
+static struct fb_ops nouveau_fbcon_ops = {
+	.owner = THIS_MODULE,
+	.fb_check_var = drm_fb_helper_check_var,
+	.fb_set_par = drm_fb_helper_set_par,
+	.fb_fillrect = nouveau_fbcon_fillrect,
+	.fb_copyarea = nouveau_fbcon_copyarea,
+	.fb_imageblit = nouveau_fbcon_imageblit,
+	.fb_sync = nouveau_fbcon_sync,
+	.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,
+};
+
+static struct fb_ops nouveau_fbcon_sw_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,
+};
+
+static void nouveau_fbcon_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
+				    u16 blue, int regno)
+{
+	struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
+
+	nv_crtc->lut.r[regno] = red;
+	nv_crtc->lut.g[regno] = green;
+	nv_crtc->lut.b[regno] = blue;
+}
+
+static void nouveau_fbcon_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
+				    u16 *blue, int regno)
+{
+	struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
+
+	*red = nv_crtc->lut.r[regno];
+	*green = nv_crtc->lut.g[regno];
+	*blue = nv_crtc->lut.b[regno];
+}
+
+static void
+nouveau_fbcon_zfill(struct drm_device *dev, struct nouveau_fbdev *fbcon)
+{
+	struct fb_info *info = fbcon->helper.fbdev;
+	struct fb_fillrect rect;
+
+	/* Clear the entire fbcon.  The drm will program every connector
+	 * with it's preferred mode.  If the sizes differ, one display will
+	 * quite likely have garbage around the console.
+	 */
+	rect.dx = rect.dy = 0;
+	rect.width = info->var.xres_virtual;
+	rect.height = info->var.yres_virtual;
+	rect.color = 0;
+	rect.rop = ROP_COPY;
+	info->fbops->fb_fillrect(info, &rect);
+}
+
+static int
+nouveau_fbcon_create(struct drm_fb_helper *helper,
+		     struct drm_fb_helper_surface_size *sizes)
+{
+	struct nouveau_fbdev *fbcon = (struct nouveau_fbdev *)helper;
+	struct drm_device *dev = fbcon->dev;
+	struct nouveau_drm *drm = nouveau_drm(dev);
+	struct nouveau_device *device = nv_device(drm->device);
+	struct fb_info *info;
+	struct drm_framebuffer *fb;
+	struct nouveau_framebuffer *nouveau_fb;
+	struct nouveau_channel *chan;
+	struct nouveau_bo *nvbo;
+	struct drm_mode_fb_cmd2 mode_cmd;
+	struct pci_dev *pdev = dev->pdev;
+	int size, ret;
+
+	mode_cmd.width = sizes->surface_width;
+	mode_cmd.height = sizes->surface_height;
+
+	mode_cmd.pitches[0] = mode_cmd.width * (sizes->surface_bpp >> 3);
+	mode_cmd.pitches[0] = roundup(mode_cmd.pitches[0], 256);
+
+	mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
+							  sizes->surface_depth);
+
+	size = mode_cmd.pitches[0] * mode_cmd.height;
+	size = roundup(size, PAGE_SIZE);
+
+	ret = nouveau_gem_new(dev, size, 0, NOUVEAU_GEM_DOMAIN_VRAM,
+			      0, 0x0000, &nvbo);
+	if (ret) {
+		NV_ERROR(drm, "failed to allocate framebuffer\n");
+		goto out;
+	}
+
+	ret = nouveau_bo_pin(nvbo, TTM_PL_FLAG_VRAM);
+	if (ret) {
+		NV_ERROR(drm, "failed to pin fb: %d\n", ret);
+		nouveau_bo_ref(NULL, &nvbo);
+		goto out;
+	}
+
+	ret = nouveau_bo_map(nvbo);
+	if (ret) {
+		NV_ERROR(drm, "failed to map fb: %d\n", ret);
+		nouveau_bo_unpin(nvbo);
+		nouveau_bo_ref(NULL, &nvbo);
+		goto out;
+	}
+
+	chan = nouveau_nofbaccel ? NULL : drm->channel;
+	if (chan && device->card_type >= NV_50) {
+		ret = nouveau_bo_vma_add(nvbo, nv_client(chan->cli)->vm,
+					&fbcon->nouveau_fb.vma);
+		if (ret) {
+			NV_ERROR(drm, "failed to map fb into chan: %d\n", ret);
+			chan = NULL;
+		}
+	}
+
+	mutex_lock(&dev->struct_mutex);
+
+	info = framebuffer_alloc(0, &pdev->dev);
+	if (!info) {
+		ret = -ENOMEM;
+		goto out_unref;
+	}
+
+	ret = fb_alloc_cmap(&info->cmap, 256, 0);
+	if (ret) {
+		ret = -ENOMEM;
+		goto out_unref;
+	}
+
+	info->par = fbcon;
+
+	nouveau_framebuffer_init(dev, &fbcon->nouveau_fb, &mode_cmd, nvbo);
+
+	nouveau_fb = &fbcon->nouveau_fb;
+	fb = &nouveau_fb->base;
+
+	/* setup helper */
+	fbcon->helper.fb = fb;
+	fbcon->helper.fbdev = info;
+
+	strcpy(info->fix.id, "nouveaufb");
+	if (nouveau_nofbaccel)
+		info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_DISABLED;
+	else
+		info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_COPYAREA |
+			      FBINFO_HWACCEL_FILLRECT |
+			      FBINFO_HWACCEL_IMAGEBLIT;
+	info->flags |= FBINFO_CAN_FORCE_OUTPUT;
+	info->fbops = &nouveau_fbcon_sw_ops;
+	info->fix.smem_start = nvbo->bo.mem.bus.base +
+			       nvbo->bo.mem.bus.offset;
+	info->fix.smem_len = size;
+
+	info->screen_base = nvbo_kmap_obj_iovirtual(nouveau_fb->nvbo);
+	info->screen_size = size;
+
+	drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
+	drm_fb_helper_fill_var(info, &fbcon->helper, sizes->fb_width, sizes->fb_height);
+
+	/* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
+
+	mutex_unlock(&dev->struct_mutex);
+
+	if (chan) {
+		ret = -ENODEV;
+		if (device->card_type < NV_50)
+			ret = nv04_fbcon_accel_init(info);
+		else
+		if (device->card_type < NV_C0)
+			ret = nv50_fbcon_accel_init(info);
+		else
+			ret = nvc0_fbcon_accel_init(info);
+
+		if (ret == 0)
+			info->fbops = &nouveau_fbcon_ops;
+	}
+
+	nouveau_fbcon_zfill(dev, fbcon);
+
+	/* To allow resizeing without swapping buffers */
+	NV_INFO(drm, "allocated %dx%d fb: 0x%lx, bo %p\n",
+		nouveau_fb->base.width, nouveau_fb->base.height,
+		nvbo->bo.offset, nvbo);
+
+	vga_switcheroo_client_fb_set(dev->pdev, info);
+	return 0;
+
+out_unref:
+	mutex_unlock(&dev->struct_mutex);
+out:
+	return ret;
+}
+
+void
+nouveau_fbcon_output_poll_changed(struct drm_device *dev)
+{
+	struct nouveau_drm *drm = nouveau_drm(dev);
+	drm_fb_helper_hotplug_event(&drm->fbcon->helper);
+}
+
+static int
+nouveau_fbcon_destroy(struct drm_device *dev, struct nouveau_fbdev *fbcon)
+{
+	struct nouveau_framebuffer *nouveau_fb = &fbcon->nouveau_fb;
+	struct fb_info *info;
+
+	if (fbcon->helper.fbdev) {
+		info = fbcon->helper.fbdev;
+		unregister_framebuffer(info);
+		if (info->cmap.len)
+			fb_dealloc_cmap(&info->cmap);
+		framebuffer_release(info);
+	}
+
+	if (nouveau_fb->nvbo) {
+		nouveau_bo_unmap(nouveau_fb->nvbo);
+		nouveau_bo_vma_del(nouveau_fb->nvbo, &nouveau_fb->vma);
+		drm_gem_object_unreference_unlocked(nouveau_fb->nvbo->gem);
+		nouveau_fb->nvbo = NULL;
+	}
+	drm_fb_helper_fini(&fbcon->helper);
+	drm_framebuffer_unregister_private(&nouveau_fb->base);
+	drm_framebuffer_cleanup(&nouveau_fb->base);
+	return 0;
+}
+
+void nouveau_fbcon_gpu_lockup(struct fb_info *info)
+{
+	struct nouveau_fbdev *fbcon = info->par;
+	struct nouveau_drm *drm = nouveau_drm(fbcon->dev);
+
+	NV_ERROR(drm, "GPU lockup - switching to software fbcon\n");
+	info->flags |= FBINFO_HWACCEL_DISABLED;
+}
+
+static struct drm_fb_helper_funcs nouveau_fbcon_helper_funcs = {
+	.gamma_set = nouveau_fbcon_gamma_set,
+	.gamma_get = nouveau_fbcon_gamma_get,
+	.fb_probe = nouveau_fbcon_create,
+};
+
+
+int
+nouveau_fbcon_init(struct drm_device *dev)
+{
+	struct nouveau_drm *drm = nouveau_drm(dev);
+	struct nouveau_fb *pfb = nouveau_fb(drm->device);
+	struct nouveau_fbdev *fbcon;
+	int preferred_bpp;
+	int ret;
+
+	if (!dev->mode_config.num_crtc)
+		return 0;
+
+	fbcon = kzalloc(sizeof(struct nouveau_fbdev), GFP_KERNEL);
+	if (!fbcon)
+		return -ENOMEM;
+
+	fbcon->dev = dev;
+	drm->fbcon = fbcon;
+	fbcon->helper.funcs = &nouveau_fbcon_helper_funcs;
+
+	ret = drm_fb_helper_init(dev, &fbcon->helper,
+				 dev->mode_config.num_crtc, 4);
+	if (ret) {
+		kfree(fbcon);
+		return ret;
+	}
+
+	drm_fb_helper_single_add_all_connectors(&fbcon->helper);
+
+	if (pfb->ram.size <= 32 * 1024 * 1024)
+		preferred_bpp = 8;
+	else
+	if (pfb->ram.size <= 64 * 1024 * 1024)
+		preferred_bpp = 16;
+	else
+		preferred_bpp = 32;
+
+	/* disable all the possible outputs/crtcs before entering KMS mode */
+	drm_helper_disable_unused_functions(dev);
+
+	drm_fb_helper_initial_config(&fbcon->helper, preferred_bpp);
+	return 0;
+}
+
+void
+nouveau_fbcon_fini(struct drm_device *dev)
+{
+	struct nouveau_drm *drm = nouveau_drm(dev);
+
+	if (!drm->fbcon)
+		return;
+
+	nouveau_fbcon_destroy(dev, drm->fbcon);
+	kfree(drm->fbcon);
+	drm->fbcon = NULL;
+}
+
+void nouveau_fbcon_save_disable_accel(struct drm_device *dev)
+{
+	struct nouveau_drm *drm = nouveau_drm(dev);
+
+	drm->fbcon->saved_flags = drm->fbcon->helper.fbdev->flags;
+	drm->fbcon->helper.fbdev->flags |= FBINFO_HWACCEL_DISABLED;
+}
+
+void nouveau_fbcon_restore_accel(struct drm_device *dev)
+{
+	struct nouveau_drm *drm = nouveau_drm(dev);
+	drm->fbcon->helper.fbdev->flags = drm->fbcon->saved_flags;
+}
+
+void nouveau_fbcon_set_suspend(struct drm_device *dev, int state)
+{
+	struct nouveau_drm *drm = nouveau_drm(dev);
+	console_lock();
+	if (state == 0)
+		nouveau_fbcon_save_disable_accel(dev);
+	fb_set_suspend(drm->fbcon->helper.fbdev, state);
+	if (state == 1)
+		nouveau_fbcon_restore_accel(dev);
+	console_unlock();
+}
+
+void nouveau_fbcon_zfill_all(struct drm_device *dev)
+{
+	struct nouveau_drm *drm = nouveau_drm(dev);
+	nouveau_fbcon_zfill(dev, drm->fbcon);
+}