1 files changed, 422 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 000000000000..8e7dc1d4912a
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nouveau_fbcon.c
@@ -0,0 +1,422 @@
+/*
+ * 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 "drmP.h"
+#include "drm.h"
+#include "drm_crtc.h"
+#include "drm_crtc_helper.h"
+#include "drm_fb_helper.h"
+#include "nouveau_drv.h"
+#include "nouveau_drm.h"
+#include "nouveau_crtc.h"
+#include "nouveau_fb.h"
+#include "nouveau_fbcon.h"
+#include "nouveau_dma.h"
+
+static int
+nouveau_fbcon_sync(struct fb_info *info)
+{
+        struct nouveau_fbcon_par *par = info->par;
+        struct drm_device *dev = par->dev;
+        struct drm_nouveau_private *dev_priv = dev->dev_private;
+        struct nouveau_channel *chan = dev_priv->channel;
+        int ret, i;
+
+        if (!chan || !chan->accel_done ||
+            info->state != FBINFO_STATE_RUNNING ||
+            info->flags & FBINFO_HWACCEL_DISABLED)
+                return 0;
+
+        if (RING_SPACE(chan, 4)) {
+                nouveau_fbcon_gpu_lockup(info);
+                return 0;
+        }
+
+        BEGIN_RING(chan, 0, 0x0104, 1);
+        OUT_RING(chan, 0);
+        BEGIN_RING(chan, 0, 0x0100, 1);
+        OUT_RING(chan, 0);
+        nouveau_bo_wr32(chan->notifier_bo, chan->m2mf_ntfy + 3, 0xffffffff);
+        FIRE_RING(chan);
+
+        ret = -EBUSY;
+        for (i = 0; i < 100000; i++) {
+                if (!nouveau_bo_rd32(chan->notifier_bo, chan->m2mf_ntfy + 3)) {
+                        ret = 0;
+                        break;
+                }
+                DRM_UDELAY(1);
+        }
+
+        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_setcolreg = drm_fb_helper_setcolreg,
+        .fb_fillrect = cfb_fillrect,
+        .fb_copyarea = cfb_copyarea,
+        .fb_imageblit = cfb_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,
+};
+
+static struct fb_ops nv04_fbcon_ops = {
+        .owner = THIS_MODULE,
+        .fb_check_var = drm_fb_helper_check_var,
+        .fb_set_par = drm_fb_helper_set_par,
+        .fb_setcolreg = drm_fb_helper_setcolreg,
+        .fb_fillrect = nv04_fbcon_fillrect,
+        .fb_copyarea = nv04_fbcon_copyarea,
+        .fb_imageblit = nv04_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,
+};
+
+static struct fb_ops nv50_fbcon_ops = {
+        .owner = THIS_MODULE,
+        .fb_check_var = drm_fb_helper_check_var,
+        .fb_set_par = drm_fb_helper_set_par,
+        .fb_setcolreg = drm_fb_helper_setcolreg,
+        .fb_fillrect = nv50_fbcon_fillrect,
+        .fb_copyarea = nv50_fbcon_copyarea,
+        .fb_imageblit = nv50_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,
+};
+
+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 struct drm_fb_helper_funcs nouveau_fbcon_helper_funcs = {
+        .gamma_set = nouveau_fbcon_gamma_set,
+        .gamma_get = nouveau_fbcon_gamma_get
+};
+
+#if defined(__i386__) || defined(__x86_64__)
+static bool
+nouveau_fbcon_has_vesafb_or_efifb(struct drm_device *dev)
+{
+        struct pci_dev *pdev = dev->pdev;
+        int ramin;
+
+        if (screen_info.orig_video_isVGA != VIDEO_TYPE_VLFB &&
+            screen_info.orig_video_isVGA != VIDEO_TYPE_EFI)
+                return false;
+
+        if (screen_info.lfb_base < pci_resource_start(pdev, 1))
+                goto not_fb;
+
+        if (screen_info.lfb_base + screen_info.lfb_size >=
+            pci_resource_start(pdev, 1) + pci_resource_len(pdev, 1))
+                goto not_fb;
+
+        return true;
+not_fb:
+        ramin = 2;
+        if (pci_resource_len(pdev, ramin) == 0) {
+                ramin = 3;
+                if (pci_resource_len(pdev, ramin) == 0)
+                        return false;
+        }
+
+        if (screen_info.lfb_base < pci_resource_start(pdev, ramin))
+                return false;
+
+        if (screen_info.lfb_base + screen_info.lfb_size >=
+            pci_resource_start(pdev, ramin) + pci_resource_len(pdev, ramin))
+                return false;
+
+        return true;
+}
+#endif
+
+void
+nouveau_fbcon_zfill(struct drm_device *dev)
+{
+        struct drm_nouveau_private *dev_priv = dev->dev_private;
+        struct fb_info *info = dev_priv->fbdev_info;
+        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_device *dev, uint32_t fb_width,
+                     uint32_t fb_height, uint32_t surface_width,
+                     uint32_t surface_height, uint32_t surface_depth,
+                     uint32_t surface_bpp, struct drm_framebuffer **pfb)
+{
+        struct drm_nouveau_private *dev_priv = dev->dev_private;
+        struct fb_info *info;
+        struct nouveau_fbcon_par *par;
+        struct drm_framebuffer *fb;
+        struct nouveau_framebuffer *nouveau_fb;
+        struct nouveau_bo *nvbo;
+        struct drm_mode_fb_cmd mode_cmd;
+        struct device *device = &dev->pdev->dev;
+        int size, ret;
+
+        mode_cmd.width = surface_width;
+        mode_cmd.height = surface_height;
+
+        mode_cmd.bpp = surface_bpp;
+        mode_cmd.pitch = mode_cmd.width * (mode_cmd.bpp >> 3);
+        mode_cmd.pitch = roundup(mode_cmd.pitch, 256);
+        mode_cmd.depth = surface_depth;
+
+        size = mode_cmd.pitch * mode_cmd.height;
+        size = roundup(size, PAGE_SIZE);
+
+        ret = nouveau_gem_new(dev, dev_priv->channel, size, 0, TTM_PL_FLAG_VRAM,
+                              0, 0x0000, false, true, &nvbo);
+        if (ret) {
+                NV_ERROR(dev, "failed to allocate framebuffer\n");
+                goto out;
+        }
+
+        ret = nouveau_bo_pin(nvbo, TTM_PL_FLAG_VRAM);
+        if (ret) {
+                NV_ERROR(dev, "failed to pin fb: %d\n", ret);
+                nouveau_bo_ref(NULL, &nvbo);
+                goto out;
+        }
+
+        ret = nouveau_bo_map(nvbo);
+        if (ret) {
+                NV_ERROR(dev, "failed to map fb: %d\n", ret);
+                nouveau_bo_unpin(nvbo);
+                nouveau_bo_ref(NULL, &nvbo);
+                goto out;
+        }
+
+        mutex_lock(&dev->struct_mutex);
+
+        fb = nouveau_framebuffer_create(dev, nvbo, &mode_cmd);
+        if (!fb) {
+                ret = -ENOMEM;
+                NV_ERROR(dev, "failed to allocate fb.\n");
+                goto out_unref;
+        }
+
+        list_add(&fb->filp_head, &dev->mode_config.fb_kernel_list);
+
+        nouveau_fb = nouveau_framebuffer(fb);
+        *pfb = fb;
+
+        info = framebuffer_alloc(sizeof(struct nouveau_fbcon_par), device);
+        if (!info) {
+                ret = -ENOMEM;
+                goto out_unref;
+        }
+
+        par = info->par;
+        par->helper.funcs = &nouveau_fbcon_helper_funcs;
+        par->helper.dev = dev;
+        ret = drm_fb_helper_init_crtc_count(&par->helper, 2, 4);
+        if (ret)
+                goto out_unref;
+        dev_priv->fbdev_info = 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->fbops = &nouveau_fbcon_ops;
+        info->fix.smem_start = dev->mode_config.fb_base + nvbo->bo.offset -
+                               dev_priv->vm_vram_base;
+        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->pitch, fb->depth);
+        drm_fb_helper_fill_var(info, fb, fb_width, fb_height);
+
+        /* FIXME: we really shouldn't expose mmio space at all */
+        info->fix.mmio_start = pci_resource_start(dev->pdev, 1);
+        info->fix.mmio_len = pci_resource_len(dev->pdev, 1);
+
+        /* Set aperture base/size for vesafb takeover */
+#if defined(__i386__) || defined(__x86_64__)
+        if (nouveau_fbcon_has_vesafb_or_efifb(dev)) {
+                /* Some NVIDIA VBIOS' are stupid and decide to put the
+                 * framebuffer in the middle of the PRAMIN BAR for
+                 * whatever reason.  We need to know the exact lfb_base
+                 * to get vesafb kicked off, and the only reliable way
+                 * we have left is to find out lfb_base the same way
+                 * vesafb did.
+                 */
+                info->aperture_base = screen_info.lfb_base;
+                info->aperture_size = screen_info.lfb_size;
+                if (screen_info.orig_video_isVGA == VIDEO_TYPE_VLFB)
+                        info->aperture_size *= 65536;
+        } else
+#endif
+        {
+                info->aperture_base = info->fix.mmio_start;
+                info->aperture_size = info->fix.mmio_len;
+        }
+
+        info->pixmap.size = 64*1024;
+        info->pixmap.buf_align = 8;
+        info->pixmap.access_align = 32;
+        info->pixmap.flags = FB_PIXMAP_SYSTEM;
+        info->pixmap.scan_align = 1;
+
+        fb->fbdev = info;
+
+        par->nouveau_fb = nouveau_fb;
+        par->dev = dev;
+
+        if (dev_priv->channel && !nouveau_nofbaccel) {
+                switch (dev_priv->card_type) {
+                case NV_50:
+                        nv50_fbcon_accel_init(info);
+                        info->fbops = &nv50_fbcon_ops;
+                        break;
+                default:
+                        nv04_fbcon_accel_init(info);
+                        info->fbops = &nv04_fbcon_ops;
+                        break;
+                };
+        }
+
+        nouveau_fbcon_zfill(dev);
+
+        /* To allow resizeing without swapping buffers */
+        NV_INFO(dev, "allocated %dx%d fb: 0x%lx, bo %p\n",
+                                                nouveau_fb->base.width,
+                                                nouveau_fb->base.height,
+                                                nvbo->bo.offset, nvbo);
+
+        mutex_unlock(&dev->struct_mutex);
+        vga_switcheroo_client_fb_set(dev->pdev, info);
+        return 0;
+
+out_unref:
+        mutex_unlock(&dev->struct_mutex);
+out:
+        return ret;
+}
+
+int
+nouveau_fbcon_probe(struct drm_device *dev)
+{
+        NV_DEBUG_KMS(dev, "\n");
+
+        return drm_fb_helper_single_fb_probe(dev, 32, nouveau_fbcon_create);
+}
+
+int
+nouveau_fbcon_remove(struct drm_device *dev, struct drm_framebuffer *fb)
+{
+        struct nouveau_framebuffer *nouveau_fb = nouveau_framebuffer(fb);
+        struct fb_info *info;
+
+        if (!fb)
+                return -EINVAL;
+
+        info = fb->fbdev;
+        if (info) {
+                struct nouveau_fbcon_par *par = info->par;
+
+                unregister_framebuffer(info);
+                nouveau_bo_unmap(nouveau_fb->nvbo);
+                drm_gem_object_unreference_unlocked(nouveau_fb->nvbo->gem);
+                nouveau_fb->nvbo = NULL;
+                if (par)
+                        drm_fb_helper_free(&par->helper);
+                framebuffer_release(info);
+        }
+
+        return 0;
+}
+
+void nouveau_fbcon_gpu_lockup(struct fb_info *info)
+{
+        struct nouveau_fbcon_par *par = info->par;
+        struct drm_device *dev = par->dev;
+
+        NV_ERROR(dev, "GPU lockup - switching to software fbcon\n");
+        info->flags |= FBINFO_HWACCEL_DISABLED;
+}