[PATCHv2 1/2] fbdev: allow passing more than one aperture for handoff

From: marcin . slusarz
Date: Mon Apr 12 2010 - 18:12:27 EST

It simplifies nouveau code by removal of detection which
region to pass to kick vesafb/efifb.

Signed-off-by: Marcin Slusarz <marcin.slusarz@xxxxxxxxx>
Cc: Eric Anholt <eric@xxxxxxxxxx>
Cc: Ben Skeggs <bskeggs@xxxxxxxxxx>
Cc: Thomas Hellstrom <thellstrom@xxxxxxxxxx>
Cc: Dave Airlie <airlied@xxxxxxxxxx>
Cc: Peter Jones <pjones@xxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
---
v2 - rebase after drop of patch 1/3
---
drivers/gpu/drm/i915/intel_fb.c | 11 +++-
drivers/gpu/drm/nouveau/nouveau_fbcon.c | 84 +++++++++---------------------
drivers/gpu/drm/radeon/radeon_fb.c | 9 +++-
drivers/gpu/drm/vmwgfx/vmwgfx_fb.c | 10 +++-
drivers/video/efifb.c | 11 +++-
drivers/video/fbmem.c | 29 ++++++++++-
drivers/video/fbsysfs.c | 1 +
drivers/video/offb.c | 28 ++++++----
drivers/video/vesafb.c | 11 +++-
include/linux/fb.h | 16 +++++-
10 files changed, 122 insertions(+), 88 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_fb.c b/drivers/gpu/drm/i915/intel_fb.c
index 8cd791d..a9192ab 100644
--- a/drivers/gpu/drm/i915/intel_fb.c
+++ b/drivers/gpu/drm/i915/intel_fb.c
@@ -192,11 +192,16 @@ static int intelfb_create(struct drm_device *dev, uint32_t fb_width,


/* setup aperture base/size for vesafb takeover */
- info->aperture_base = dev->mode_config.fb_base;
+ info->apertures = alloc_apertures(1);
+ if (!info->apertures) {
+ ret = -ENOMEM;
+ goto out_unpin;
+ }
+ info->apertures->ranges[0].base = dev->mode_config.fb_base;
if (IS_I9XX(dev))
- info->aperture_size = pci_resource_len(dev->pdev, 2);
+ info->apertures->ranges[0].size = pci_resource_len(dev->pdev, 2);
else
- info->aperture_size = pci_resource_len(dev->pdev, 0);
+ info->apertures->ranges[0].size = pci_resource_len(dev->pdev, 0);

info->fix.smem_start = dev->mode_config.fb_base + obj_priv->gtt_offset;
info->fix.smem_len = size;
diff --git a/drivers/gpu/drm/nouveau/nouveau_fbcon.c b/drivers/gpu/drm/nouveau/nouveau_fbcon.c
index 68cedd9..206368b 100644
--- a/drivers/gpu/drm/nouveau/nouveau_fbcon.c
+++ b/drivers/gpu/drm/nouveau/nouveau_fbcon.c
@@ -161,44 +161,6 @@ static struct drm_fb_helper_funcs nouveau_fbcon_helper_funcs = {
.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)
{
@@ -231,7 +193,9 @@ nouveau_fbcon_create(struct drm_device *dev, uint32_t fb_width,
struct nouveau_framebuffer *nouveau_fb;
struct nouveau_bo *nvbo;
struct drm_mode_fb_cmd mode_cmd;
- struct device *device = &dev->pdev->dev;
+ struct pci_dev *pdev = dev->pdev;
+ struct device *device = &pdev->dev;
+ struct apertures_struct *aper;
int size, ret;

mode_cmd.width = surface_width;
@@ -314,28 +278,30 @@ nouveau_fbcon_create(struct drm_device *dev, uint32_t fb_width,
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);
+ info->fix.mmio_start = pci_resource_start(pdev, 1);
+ info->fix.mmio_len = pci_resource_len(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;
+ aper = info->apertures = alloc_apertures(3);
+ if (!info->apertures) {
+ ret = -ENOMEM;
+ goto out_unref;
+ }
+
+ aper->ranges[0].base = pci_resource_start(pdev, 1);
+ aper->ranges[0].size = pci_resource_len(pdev, 1);
+ aper->count = 1;
+
+ if (pci_resource_len(pdev, 2)) {
+ aper->ranges[aper->count].base = pci_resource_start(pdev, 2);
+ aper->ranges[aper->count].size = pci_resource_len(pdev, 2);
+ aper->count++;
+ }
+
+ if (pci_resource_len(pdev, 3)) {
+ aper->ranges[aper->count].base = pci_resource_start(pdev, 3);
+ aper->ranges[aper->count].size = pci_resource_len(pdev, 3);
+ aper->count++;
}

info->pixmap.size = 64*1024;
diff --git a/drivers/gpu/drm/radeon/radeon_fb.c b/drivers/gpu/drm/radeon/radeon_fb.c
index 8fccbf2..2b57cb4 100644
--- a/drivers/gpu/drm/radeon/radeon_fb.c
+++ b/drivers/gpu/drm/radeon/radeon_fb.c
@@ -263,8 +263,13 @@ int radeonfb_create(struct drm_device *dev,
drm_fb_helper_fill_var(info, fb, fb_width, fb_height);

/* setup aperture base/size for vesafb takeover */
- info->aperture_base = rdev->ddev->mode_config.fb_base;
- info->aperture_size = rdev->mc.real_vram_size;
+ info->apertures = alloc_apertures(1);
+ if (!info->apertures) {
+ ret = -ENOMEM;
+ goto out_unref;
+ }
+ info->apertures->ranges[0].base = rdev->ddev->mode_config.fb_base;
+ info->apertures->ranges[0].size = rdev->mc.real_vram_size;

info->fix.mmio_start = 0;
info->fix.mmio_len = 0;
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_fb.c b/drivers/gpu/drm/vmwgfx/vmwgfx_fb.c
index a933670..0248c6b 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_fb.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_fb.c
@@ -559,8 +559,13 @@ int vmw_fb_init(struct vmw_private *vmw_priv)
info->pixmap.scan_align = 1;
#endif

- info->aperture_base = vmw_priv->vram_start;
- info->aperture_size = vmw_priv->vram_size;
+ info->apertures = alloc_apertures(1);
+ if (!info->apertures) {
+ ret = -ENOMEM;
+ goto err_aper;
+ }
+ info->apertures->ranges[0].base = vmw_priv->vram_start;
+ info->apertures->ranges[0].size = vmw_priv->vram_size;

/*
* Dirty & Deferred IO
@@ -580,6 +585,7 @@ int vmw_fb_init(struct vmw_private *vmw_priv)

err_defio:
fb_deferred_io_cleanup(info);
+err_aper:
ttm_bo_kunmap(&par->map);
err_unref:
ttm_bo_unref((struct ttm_buffer_object **)&par->vmw_bo);
diff --git a/drivers/video/efifb.c b/drivers/video/efifb.c
index 581d2db..3b98656 100644
--- a/drivers/video/efifb.c
+++ b/drivers/video/efifb.c
@@ -165,7 +165,7 @@ static void efifb_destroy(struct fb_info *info)
{
if (info->screen_base)
iounmap(info->screen_base);
- release_mem_region(info->aperture_base, info->aperture_size);
+ release_mem_region(info->apertures->ranges[0].base, info->apertures->ranges[0].size);
framebuffer_release(info);
}

@@ -289,8 +289,13 @@ static int __devinit efifb_probe(struct platform_device *dev)
info->pseudo_palette = info->par;
info->par = NULL;

- info->aperture_base = efifb_fix.smem_start;
- info->aperture_size = size_remap;
+ info->apertures = alloc_apertures(1);
+ if (!info->apertures) {
+ err = -ENOMEM;
+ goto err_release_fb;
+ }
+ info->apertures->ranges[0].base = efifb_fix.smem_start;
+ info->apertures->ranges[0].size = size_remap;

info->screen_base = ioremap(efifb_fix.smem_start, efifb_fix.smem_len);
if (!info->screen_base) {
diff --git a/drivers/video/fbmem.c b/drivers/video/fbmem.c
index a15b44e..03f2dc2 100644
--- a/drivers/video/fbmem.c
+++ b/drivers/video/fbmem.c
@@ -1468,16 +1468,39 @@ static int fb_check_foreignness(struct fb_info *fi)
return 0;
}

-static bool fb_do_apertures_overlap(struct fb_info *gen, struct fb_info *hw)
+static bool apertures_overlap(struct aperture *gen, struct aperture *hw)
{
/* is the generic aperture base the same as the HW one */
- if (gen->aperture_base == hw->aperture_base)
+ if (gen->base == hw->base)
return true;
/* is the generic aperture base inside the hw base->hw base+size */
- if (gen->aperture_base > hw->aperture_base && gen->aperture_base <= hw->aperture_base + hw->aperture_size)
+ if (gen->base > hw->base && gen->base <= hw->base + hw->size)
return true;
return false;
}
+
+static bool fb_do_apertures_overlap(struct fb_info *gen, struct fb_info *hw)
+{
+ int i, j;
+ struct apertures_struct *hwa = hw->apertures;
+ struct apertures_struct *gena = gen->apertures;
+ if (!hwa || !gena)
+ return false;
+
+ for (i = 0; i < hwa->count; ++i) {
+ struct aperture *h = &hwa->ranges[i];
+ for (j = 0; j < gena->count; ++j) {
+ struct aperture *g = &gena->ranges[j];
+ printk(KERN_DEBUG "checking generic (%llx %llx) vs hw (%llx %llx)\n",
+ g->base, g->size, h->base, h->size);
+ if (apertures_overlap(g, h))
+ return true;
+ }
+ }
+
+ return false;
+}
+
/**
* register_framebuffer - registers a frame buffer device
* @fb_info: frame buffer info structure
diff --git a/drivers/video/fbsysfs.c b/drivers/video/fbsysfs.c
index d4a2c11..fd5519b 100644
--- a/drivers/video/fbsysfs.c
+++ b/drivers/video/fbsysfs.c
@@ -79,6 +79,7 @@ EXPORT_SYMBOL(framebuffer_alloc);
*/
void framebuffer_release(struct fb_info *info)
{
+ kfree(info->apertures);
kfree(info);
}
EXPORT_SYMBOL(framebuffer_release);
diff --git a/drivers/video/offb.c b/drivers/video/offb.c
index b043ac8..3d202b2 100644
--- a/drivers/video/offb.c
+++ b/drivers/video/offb.c
@@ -286,7 +286,7 @@ static void offb_destroy(struct fb_info *info)
{
if (info->screen_base)
iounmap(info->screen_base);
- release_mem_region(info->aperture_base, info->aperture_size);
+ release_mem_region(info->apertures->ranges[0].base, info->apertures->ranges[0].size);
framebuffer_release(info);
}

@@ -492,8 +492,11 @@ static void __init offb_init_fb(const char *name, const char *full_name,
var->vmode = FB_VMODE_NONINTERLACED;

/* set offb aperture size for generic probing */
- info->aperture_base = address;
- info->aperture_size = fix->smem_len;
+ info->apertures = alloc_apertures(1);
+ if (!info->apertures)
+ goto out_aper;
+ info->apertures->ranges[0].base = address;
+ info->apertures->ranges[0].size = fix->smem_len;

info->fbops = &offb_ops;
info->screen_base = ioremap(address, fix->smem_len);
@@ -502,17 +505,20 @@ static void __init offb_init_fb(const char *name, const char *full_name,

fb_alloc_cmap(&info->cmap, 256, 0);

- if (register_framebuffer(info) < 0) {
- iounmap(par->cmap_adr);
- par->cmap_adr = NULL;
- iounmap(info->screen_base);
- framebuffer_release(info);
- release_mem_region(res_start, res_size);
- return;
- }
+ if (register_framebuffer(info) < 0)
+ goto out_err;

printk(KERN_INFO "fb%d: Open Firmware frame buffer device on %s\n",
info->node, full_name);
+ return;
+
+out_err:
+ iounmap(info->screen_base);
+out_aper:
+ iounmap(par->cmap_adr);
+ par->cmap_adr = NULL;
+ framebuffer_release(info);
+ release_mem_region(res_start, res_size);
}


diff --git a/drivers/video/vesafb.c b/drivers/video/vesafb.c
index ef4128c..5de9ee1 100644
--- a/drivers/video/vesafb.c
+++ b/drivers/video/vesafb.c
@@ -178,7 +178,7 @@ static void vesafb_destroy(struct fb_info *info)
{
if (info->screen_base)
iounmap(info->screen_base);
- release_mem_region(info->aperture_base, info->aperture_size);
+ release_mem_region(info->apertures->ranges[0].base, info->apertures->ranges[0].size);
framebuffer_release(info);
}

@@ -296,8 +296,13 @@ static int __devinit vesafb_probe(struct platform_device *dev)
info->par = NULL;

/* set vesafb aperture size for generic probing */
- info->aperture_base = screen_info.lfb_base;
- info->aperture_size = size_total;
+ info->apertures = alloc_apertures(1);
+ if (!info->apertures) {
+ err = -ENOMEM;
+ goto err;
+ }
+ info->apertures->ranges[0].base = screen_info.lfb_base;
+ info->apertures->ranges[0].size = size_total;

info->screen_base = ioremap(vesafb_fix.smem_start, vesafb_fix.smem_len);
if (!info->screen_base) {
diff --git a/include/linux/fb.h b/include/linux/fb.h
index c10163b..9605b81 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -862,10 +862,22 @@ struct fb_info {
/* we need the PCI or similiar aperture base/size not
smem_start/size as smem_start may just be an object
allocated inside the aperture so may not actually overlap */
- resource_size_t aperture_base;
- resource_size_t aperture_size;
+ struct apertures_struct {
+ unsigned int count;
+ struct aperture {
+ resource_size_t base;
+ resource_size_t size;
+ } ranges[0];
+ } *apertures;
};

+static inline struct apertures_struct *alloc_apertures(unsigned int max_num) {
+ struct apertures_struct *a = kzalloc(sizeof(struct apertures_struct)
+ + max_num * sizeof(struct aperture), GFP_KERNEL);
+ a->count = max_num;
+ return a;
+}
+
#ifdef MODULE
#define FBINFO_DEFAULT FBINFO_MODULE
#else
--
1.7.0.4

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