fbdev: allow passing more than one aperture for handoff

It removes a hack from nouveau code which had to detect which
region to pass to kick vesafb/efifb.

Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Cc: Eric Anholt <eric@anholt.net>
Cc: Ben Skeggs <bskeggs@redhat.com>
Cc: Thomas Hellstrom <thellstrom@vmware.com>
Cc: Dave Airlie <airlied@redhat.com>
Cc: Peter Jones <pjones@redhat.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>

5 files changed, 60 insertions, 20 deletions

diff --git a/drivers/video/efifb.c b/drivers/video/efifb.c
index 581d2dbf675a..3b986567111a 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 a15b44e9c003..03f2dc2470b5 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 81aa3129c17d..0a08f1341227 100644
--- a/drivers/video/fbsysfs.c
+++ b/drivers/video/fbsysfs.c
@@ -80,6 +80,7 @@ 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 61f8b8f919b0..46dda7d8aaee 100644
--- a/drivers/video/offb.c
+++ b/drivers/video/offb.c
@@ -285,7 +285,7 @@ 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);
 }
 
@@ -491,8 +491,11 @@ 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);
@@ -501,17 +504,20 @@ 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 0cadf7aee27e..090aa1a9be6e 100644
--- a/drivers/video/vesafb.c
+++ b/drivers/video/vesafb.c
@@ -177,7 +177,7 @@ 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);
 }
 
@@ -295,8 +295,13 @@ static int __init 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) {