Commit daab23f1 authored by Alan Cox's avatar Alan Cox Committed by Greg Kroah-Hartman
Browse files

gma500: revamp frame buffer creation and handling 



Restructure this to work the same way as the i915 frame buffer does. That
cleans up various chunks of code.

We can now set a mode in modetest but mode restore is a bit iffy

Signed-off-by: default avatarAlan Cox <alan@linux.intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 9460e84a

drivers/staging/gma500/psb_2d.c

+3 −10
Original line number Diff line number Diff line
@@ -148,7 +148,7 @@ static void psbfb_fillrect_accel(struct fb_info *info, 
				 const struct fb_fillrect *r)

{

	struct psb_fbdev *fbdev = info->par;

	struct psb_framebuffer *psbfb = fbdev->pfb;

	struct psb_framebuffer *psbfb = &fbdev->pfb;

	struct drm_device *dev = psbfb->base.dev;

	struct drm_framebuffer *fb = fbdev->psb_fb_helper.fb;

	struct drm_psb_private *dev_priv = dev->dev_private;
@@ -291,7 +291,7 @@ static void psbfb_copyarea_accel(struct fb_info *info, 
				 const struct fb_copyarea *a)

{

	struct psb_fbdev *fbdev = info->par;

	struct psb_framebuffer *psbfb = fbdev->pfb;

	struct psb_framebuffer *psbfb = &fbdev->pfb;

	struct drm_device *dev = psbfb->base.dev;

	struct drm_framebuffer *fb = fbdev->psb_fb_helper.fb;

	struct drm_psb_private *dev_priv = dev->dev_private;
@@ -360,19 +360,12 @@ void psbfb_imageblit(struct fb_info *info, const struct fb_image *image) 
int psbfb_sync(struct fb_info *info)

{

	struct psb_fbdev *fbdev = info->par;

	struct psb_framebuffer *psbfb = fbdev->pfb;

	struct psb_framebuffer *psbfb = &fbdev->pfb;

	struct drm_device *dev = psbfb->base.dev;

	struct drm_psb_private *dev_priv = dev->dev_private;

	unsigned long _end = jiffies + DRM_HZ;

	int busy = 0;



#if 0

        /* Just a way to quickly test if cmd issue explodes */

	u32 test[2] = {

	        PSB_2D_FENCE_BH,

        };

	psbfb_2d_submit(dev_priv, test, 1);

#endif	

	/*

	 * First idle the 2D engine.

	 */

drivers/staging/gma500/psb_fb.c

+110 −85
Original line number Diff line number Diff line
@@ -235,7 +235,7 @@ static struct vm_operations_struct psbfb_vm_ops = { 
static int psbfb_mmap(struct fb_info *info, struct vm_area_struct *vma)

{

	struct psb_fbdev *fbdev = info->par;

	struct psb_framebuffer *psbfb = fbdev->pfb;

	struct psb_framebuffer *psbfb = &fbdev->pfb;

	char *fb_screen_base = NULL;

	struct drm_device *dev = psbfb->base.dev;

	struct drm_psb_private *dev_priv = dev->dev_private;
@@ -267,7 +267,7 @@ static int psbfb_mmap(struct fb_info *info, struct vm_area_struct *vma) 
static int psbfb_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg)

{

	struct psb_fbdev *fbdev = info->par;

	struct psb_framebuffer *psbfb = fbdev->pfb;

	struct psb_framebuffer *psbfb = &fbdev->pfb;

	struct drm_device *dev = psbfb->base.dev;

	struct drm_psb_private *dev_priv = dev->dev_private;

	u32 __user *p = (u32 __user *)arg;
@@ -304,8 +304,58 @@ static struct fb_ops psbfb_ops = { 
	.fb_ioctl = psbfb_ioctl,

};



/**

 *	psb_framebuffer_init	-	initialize a framebuffer

 *	@dev: our DRM device

 *	@fb: framebuffer to set up

 *	@mode_cmd: mode description

 *	@gt: backing object

 *

 *	Configure and fill in the boilerplate for our frame buffer. Return

 *	0 on success or an error code if we fail.

 */

static int psb_framebuffer_init(struct drm_device *dev,

                                struct psb_framebuffer *fb,

                                struct drm_mode_fb_cmd *mode_cmd,

                                struct gtt_range *gt)

{

        int ret;



        if (mode_cmd->pitch & 63)

                return -EINVAL;

        switch (mode_cmd->bpp) {

        case 8:

        case 16:

        case 24:

        case 32:

                break;

        default:

                return -EINVAL;

        }

        ret = drm_framebuffer_init(dev, &fb->base, &psb_fb_funcs);

        if (ret) {

                dev_err(dev->dev, "framebuffer init failed: %d\n", ret);

                return ret;

        }

        drm_helper_mode_fill_fb_struct(&fb->base, mode_cmd);

        fb->gtt = gt;

        return 0;

}

                

/**

 *	psb_framebuffer_create	-	create a framebuffer backed by gt

 *	@dev: our DRM device

 *	@mode_cmd: the description of the requested mode

 *	@gt: the backing object

 *

 *	Create a framebuffer object backed by the gt, and fill in the

 *	boilerplate required

 *

 *	TODO: review object references

 */

static struct drm_framebuffer *psb_framebuffer_create

			(struct drm_device *dev, struct drm_mode_fb_cmd *r,

			(struct drm_device *dev,

			 struct drm_mode_fb_cmd *mode_cmd,

			 struct gtt_range *gt)

{

	struct psb_framebuffer *fb;
@@ -313,22 +363,14 @@ static struct drm_framebuffer *psb_framebuffer_create 


	fb = kzalloc(sizeof(*fb), GFP_KERNEL);

	if (!fb)

		return NULL;



	ret = drm_framebuffer_init(dev, &fb->base, &psb_fb_funcs);



	if (ret)

		goto err;



	drm_helper_mode_fill_fb_struct(&fb->base, r);



	fb->gtt = gt;



	return &fb->base;

		return ERR_PTR(-ENOMEM);



err:

	ret = psb_framebuffer_init(dev, fb, mode_cmd, gt);

	if (ret) {

	        kfree(fb);

	return NULL;

	        return ERR_PTR(ret);

        }

        return &fb->base;

}



/**
@@ -380,56 +422,63 @@ static int psbfb_create(struct psb_fbdev *fbdev, 
	struct drm_psb_private *dev_priv = dev->dev_private;

	struct fb_info *info;

	struct drm_framebuffer *fb;

	struct psb_framebuffer *psbfb;

	struct psb_framebuffer *psbfb = &fbdev->pfb;

	struct drm_mode_fb_cmd mode_cmd;

	struct device *device = &dev->pdev->dev;

	int size, aligned_size;

	int size;

	int ret;

	struct gtt_range *backing;



	mode_cmd.width = sizes->surface_width;

	mode_cmd.height = sizes->surface_height;

	mode_cmd.bpp = sizes->surface_bpp;



	/* No 24bit packed */

	if (mode_cmd.bpp == 24)

        	mode_cmd.bpp = 32;



	/* HW requires pitch to be 64 byte aligned */

	mode_cmd.pitch =  ALIGN(mode_cmd.width * ((mode_cmd.bpp + 1) / 8), 64);

	mode_cmd.depth = 24;

	mode_cmd.pitch =  ALIGN(mode_cmd.width * ((mode_cmd.bpp + 7) / 8), 64);

	mode_cmd.depth = sizes->surface_depth;



	size = mode_cmd.pitch * mode_cmd.height;

	aligned_size = ALIGN(size, PAGE_SIZE);

	size = ALIGN(size, PAGE_SIZE);



	/* Allocate the framebuffer in the GTT with stolen page backing */

	backing = psbfb_alloc(dev, aligned_size);

	backing = psbfb_alloc(dev, size);

	if (backing == NULL)

	        return -ENOMEM;



	mutex_lock(&dev->struct_mutex);

	fb = psb_framebuffer_create(dev, &mode_cmd, backing);

	if (!fb) {

		DRM_ERROR("failed to allocate fb.\n");

		ret = -ENOMEM;

		goto out_err1;

	}

	psbfb = to_psb_fb(fb);



	info = framebuffer_alloc(sizeof(struct psb_fbdev), device);

	info = framebuffer_alloc(0, device);

	if (!info) {

		ret = -ENOMEM;

		goto out_err0;

		goto out_err1;

	}



	info->par = fbdev;



	ret = psb_framebuffer_init(dev, psbfb, &mode_cmd, backing);

	if (ret)

		goto out_unref;



        fb = &psbfb->base;

	psbfb->fbdev = info;



	fbdev->psb_fb_helper.fb = fb;

	fbdev->psb_fb_helper.fbdev = info;

	fbdev->pfb = psbfb;



	strcpy(info->fix.id, "psbfb");



	info->flags = FBINFO_DEFAULT;

	info->fbops = &psbfb_ops;



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

	if (ret) {

		ret = -ENOMEM;

		goto out_unref;

	}



	info->fix.smem_start = dev->mode_config.fb_base;

	info->fix.smem_len = size;
@@ -445,18 +494,18 @@ static int psbfb_create(struct psb_fbdev *fbdev, 
		if (info->screen_base == NULL) {

			psb_gtt_unpin(backing);

			ret = -ENOMEM;

			goto out_err0;

			goto out_unref;

		}

		psbfb->vm_map = 1;

	}

	info->screen_size = size;

	memset(info->screen_base, 0, size);

/*	memset(info->screen_base, 0, size); */



	if (dev_priv->pg->stolen_size) {

		info->apertures = alloc_apertures(1);

		if (!info->apertures) {

			ret = -ENOMEM;

			goto out_err0;

			goto out_unref;

		}

		info->apertures->ranges[0].base = dev->mode_config.fb_base;

		info->apertures->ranges[0].size = dev_priv->pg->stolen_size;
@@ -484,8 +533,14 @@ static int psbfb_create(struct psb_fbdev *fbdev, 
	mutex_unlock(&dev->struct_mutex);



	return 0;

out_err0:

	fb->funcs->destroy(fb);

out_unref:

        if (backing->stolen)

                psb_gtt_free_range(dev, backing);

        else {

                if (psbfb->vm_map)

                        vm_unmap_ram(info->screen_base, backing->npage);

                drm_gem_object_unreference(&backing->gem);

        }

out_err1:

	mutex_unlock(&dev->struct_mutex);

	psb_gtt_free_range(dev, backing);
@@ -506,7 +561,6 @@ static struct drm_framebuffer *psb_user_framebuffer_create 
{

        struct gtt_range *r;

        struct drm_gem_object *obj;

        struct psb_framebuffer *psbfb;



        /* Find the GEM object and thus the gtt range object that is

           to back this space */
@@ -514,23 +568,9 @@ static struct drm_framebuffer *psb_user_framebuffer_create 
	if (obj == NULL)

	        return ERR_PTR(-ENOENT);



        /* Allocate a framebuffer */

        psbfb = kzalloc(sizeof(*psbfb), GFP_KERNEL);

        if (psbfb == NULL) {

                drm_gem_object_unreference_unlocked(obj);

                return ERR_PTR(-ENOMEM);

        }

        

        /* Let the core code do all the work */

        r = container_of(obj, struct gtt_range, gem);

	if (psb_framebuffer_create(dev, cmd, r) == NULL) {

                drm_gem_object_unreference_unlocked(obj);

                kfree(psbfb);

                return ERR_PTR(-EINVAL);

        }

        /* Return the drm_framebuffer contained within the psb fbdev which

           has been initialized by the framebuffer creation */

        return &psbfb->base;

	return psb_framebuffer_create(dev, cmd, r);

}



static void psbfb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
@@ -572,7 +612,7 @@ struct drm_fb_helper_funcs psb_fb_helper_funcs = { 
int psb_fbdev_destroy(struct drm_device *dev, struct psb_fbdev *fbdev)

{

	struct fb_info *info;

	struct psb_framebuffer *psbfb = fbdev->pfb;

	struct psb_framebuffer *psbfb = &fbdev->pfb;



	if (fbdev->psb_fb_helper.fbdev) {

		info = fbdev->psb_fb_helper.fbdev;
@@ -583,6 +623,15 @@ int psb_fbdev_destroy(struct drm_device *dev, struct psb_fbdev *fbdev) 
			vm_unmap_ram(info->screen_base, psbfb->gtt->npage);

			psb_gtt_unpin(psbfb->gtt);

		}

		unregister_framebuffer(info);

		if (info->cmap.len)

		        fb_dealloc_cmap(&info->cmap);

		framebuffer_release(info);

	}

	drm_fb_helper_fini(&fbdev->psb_fb_helper);

	drm_framebuffer_cleanup(&psbfb->base);

	

	if (psbfb->gtt) {

		/* FIXME: this is a bit more inside knowledge than I'd like

		   but I don't see how to make a fake GEM object of the

		   stolen space nicely */
@@ -590,13 +639,7 @@ int psb_fbdev_destroy(struct drm_device *dev, struct psb_fbdev *fbdev) 
			psb_gtt_free_range(dev, psbfb->gtt);

		else

			drm_gem_object_unreference(&psbfb->gtt->gem);

		unregister_framebuffer(info);

		iounmap(info->screen_base);

		framebuffer_release(info);

        }



	drm_fb_helper_fini(&fbdev->psb_fb_helper);

	drm_framebuffer_cleanup(&psbfb->base);

	return 0;

}
@@ -644,22 +687,6 @@ static void psbfb_output_poll_changed(struct drm_device *dev) 
	drm_fb_helper_hotplug_event(&fbdev->psb_fb_helper);

}



int psbfb_remove(struct drm_device *dev, struct drm_framebuffer *fb)

{

	struct fb_info *info;

	struct psb_framebuffer *psbfb = to_psb_fb(fb);



	if (drm_psb_no_fb)

		return 0;



	info = psbfb->fbdev;



	if (info)

		framebuffer_release(info);

	return 0;

}

/*EXPORT_SYMBOL(psbfb_remove); */



/**

 *	psb_user_framebuffer_create_handle - add hamdle to a framebuffer

 *	@fb: framebuffer
@@ -690,15 +717,13 @@ static int psb_user_framebuffer_create_handle(struct drm_framebuffer *fb, 
 */

static void psb_user_framebuffer_destroy(struct drm_framebuffer *fb)

{

	struct drm_device *dev = fb->dev;

	struct psb_framebuffer *psbfb = to_psb_fb(fb);

	struct gtt_range *r = psbfb->gtt;



	/* Should never get stolen memory for a user fb */

	WARN_ON(r->stolen);

	pr_err("user framebuffer destroy %p, fbdev %p\n",

						psbfb, psbfb->fbdev);

	if (psbfb->fbdev)

		psbfb_remove(dev, fb);



        /* Let DRM do its clean up */

	drm_framebuffer_cleanup(fb);

	/*  We are no longer using the resource in GEM */

drivers/staging/gma500/psb_fb.h

+1 −1
Original line number Diff line number Diff line
@@ -38,7 +38,7 @@ struct psb_framebuffer { 


struct psb_fbdev {

	struct drm_fb_helper psb_fb_helper;

	struct psb_framebuffer *pfb;

	struct psb_framebuffer pfb;

};

drivers/staging/gma500/psb_gem.c

+17 −1
Original line number Diff line number Diff line
@@ -51,6 +51,7 @@ void psb_gem_free_object(struct drm_gem_object *obj) 
	}

	drm_gem_object_release(obj);

	/* This must occur last as it frees up the memory of the GEM object */

	pr_err("GEM destroyed %p, %p\n", gtt, obj);

	psb_gtt_free_range(obj->dev, gtt);

}
@@ -176,21 +177,28 @@ static int psb_gem_create(struct drm_file *file, 


	size = roundup(size, PAGE_SIZE);



	dev_err(dev->dev, "GEM creating %lld\n", size);



	/* Allocate our object - for now a direct gtt range which is not 

	   stolen memory backed */

	r = psb_gtt_alloc_range(dev, size, "gem", 0);

	if (r == NULL)

	if (r == NULL) {

		dev_err(dev->dev, "no memory for %lld byte GEM object\n", size);

		return -ENOSPC;

	}

	/* Initialize the extra goodies GEM needs to do all the hard work */

	if (drm_gem_object_init(dev, &r->gem, size) != 0) {

		psb_gtt_free_range(dev, r);

		/* GEM doesn't give an error code and we don't have an

		   EGEMSUCKS so make something up for now - FIXME */

		dev_err(dev->dev, "GEM init failed for %lld\n", size);

		return -ENOMEM;

	}

	/* Give the object a handle so we can carry it more easily */

	ret = drm_gem_handle_create(file, &r->gem, &handle);

	if (ret) {

		dev_err(dev->dev, "GEM handle failed for %p, %lld\n",

							&r->gem, size);

		drm_gem_object_release(&r->gem);

		psb_gtt_free_range(dev, r);

		return ret;
@@ -198,6 +206,8 @@ static int psb_gem_create(struct drm_file *file, 
	/* We have the initial and handle reference but need only one now */

	drm_gem_object_unreference(&r->gem);

	*handlep = handle;

	dev_err(dev->dev, "GEM handle %x for %p OK\n",

				handle, &r->gem);

	return 0;

}
@@ -273,9 +283,12 @@ int psb_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf) 
	   something from beneath our feet */

	mutex_lock(&dev->struct_mutex);



	dev_err(dev->dev, "Fault on GTT %p\n", r);



	/* For now the mmap pins the object and it stays pinned. As things

	   stand that will do us no harm */

	if (r->mmapping == 0) {

		dev_err(dev->dev, "Need to pin %p\n", r);

		ret = psb_gtt_pin(r);

		if (ret < 0) {

		        DRM_ERROR("gma500: pin failed: %d\n", ret);
@@ -289,10 +302,13 @@ int psb_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf) 
	page_offset = ((unsigned long) vmf->virtual_address - vma->vm_start)

				>> PAGE_SHIFT;



	dev_err(dev->dev, "Page offset %p %d\n", r, (int)page_offset);

        /* CPU view of the page, don't go via the GART for CPU writes */

	pfn = page_to_phys(r->pages[page_offset]) >> PAGE_SHIFT;

	ret = vm_insert_pfn(vma, (unsigned long)vmf->virtual_address, pfn);



	dev_err(dev->dev, "PFN %ld for VA %p = %d\n", pfn, vmf->virtual_address, ret);



fail:

        mutex_unlock(&dev->struct_mutex);

	switch (ret) {

drivers/staging/gma500/psb_gtt.c

+2 −0
Original line number Diff line number Diff line
@@ -314,6 +314,7 @@ struct gtt_range *psb_gtt_alloc_range(struct drm_device *dev, int len, 
				len, start, end, PAGE_SIZE, NULL, NULL);

	if (ret == 0) {

		gt->offset = gt->resource.start - r->start;

		dev_err(dev->dev, "GTT new %p, %d\n", gt, gt->stolen);

		return gt;

	}

	kfree(gt);
@@ -340,6 +341,7 @@ static void psb_gtt_destroy(struct kref *kref) 
	}

	WARN_ON(gt->in_gart && !gt->stolen);

	release_resource(&gt->resource);

	pr_err("GTT destroyed %p, %d\n", gt, gt->stolen);

	kfree(gt);

}

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