// SPDX-License-Identifier: GPL-2.0-only/************************************************************************** * Copyright (c) 2007-2011, Intel Corporation. * All Rights Reserved. * **************************************************************************/ #include <linux/fb.h> #include <drm/drm_crtc_helper.h>#include <drm/drm_drv.h>#include <drm/drm_fb_helper.h>#include <drm/drm_framebuffer.h> #include "gem.h"#include "psb_drv.h" /* * VM area struct */ static vm_fault_t psb_fbdev_vm_fault(struct vm_fault *vmf){	struct vm_area_struct *vma = vmf->vma;	struct fb_info *info = vma->vm_private_data;	unsigned long address = vmf->address - (vmf->pgoff << PAGE_SHIFT);	unsigned long pfn = info->fix.smem_start >> PAGE_SHIFT;	vm_fault_t err = VM_FAULT_SIGBUS;	unsigned long page_num = vma_pages(vma);	unsigned long i; 	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); 	for (i = 0; i < page_num; ++i) {		err = vmf_insert_mixed(vma, address, pfn);		if (unlikely(err & VM_FAULT_ERROR))			break;		address += PAGE_SIZE;		++pfn;	} 	return err;} static const struct vm_operations_struct psb_fbdev_vm_ops = {	.fault	= psb_fbdev_vm_fault,}; /* * struct fb_ops */ static int psb_fbdev_fb_mmap(struct fb_info *info, struct vm_area_struct *vma){	if (vma->vm_pgoff != 0)		return -EINVAL;	if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))		return -EINVAL; 	/*	 * If this is a GEM object then info->screen_base is the virtual	 * kernel remapping of the object. FIXME: Review if this is	 * suitable for our mmap work	 */	vma->vm_ops = &psb_fbdev_vm_ops;	vma->vm_private_data = info;	vm_flags_set(vma, VM_IO | VM_MIXEDMAP | VM_DONTEXPAND | VM_DONTDUMP); 	return 0;} static void psb_fbdev_fb_destroy(struct fb_info *info){	struct drm_fb_helper *fb_helper = info->par; 	drm_fb_helper_fini(fb_helper); 	drm_client_buffer_delete(fb_helper->buffer);	drm_client_release(&fb_helper->client);} static const struct fb_ops psb_fbdev_fb_ops = {	.owner = THIS_MODULE,	__FB_DEFAULT_IOMEM_OPS_RDWR,	DRM_FB_HELPER_DEFAULT_OPS,	__FB_DEFAULT_IOMEM_OPS_DRAW,	.fb_mmap = psb_fbdev_fb_mmap,	.fb_destroy = psb_fbdev_fb_destroy,}; static const struct drm_fb_helper_funcs psb_fbdev_fb_helper_funcs = {}; /* * struct drm_driver */ int psb_fbdev_driver_fbdev_probe(struct drm_fb_helper *fb_helper,				 struct drm_fb_helper_surface_size *sizes){	struct drm_client_dev *client = &fb_helper->client;	struct drm_device *dev = client->dev;	struct drm_file *file = client->file;	struct drm_psb_private *dev_priv = to_drm_psb_private(dev);	struct pci_dev *pdev = to_pci_dev(dev->dev);	struct fb_info *info = fb_helper->info;	u32 fourcc, pitch;	u64 size;	const struct drm_format_info *format;	struct drm_client_buffer *buffer;	struct psb_gem_object *backing;	struct drm_gem_object *obj;	u32 handle;	int ret; 	/* No 24-bit packed mode */	if (sizes->surface_bpp == 24) {		sizes->surface_bpp = 32;		sizes->surface_depth = 24;	} try_psb_gem_create:	fourcc = drm_mode_legacy_fb_format(sizes->surface_bpp, sizes->surface_depth);	format = drm_get_format_info(dev, fourcc, DRM_FORMAT_MOD_LINEAR);	pitch = ALIGN(drm_format_info_min_pitch(format, 0, sizes->surface_width), SZ_64);	size = ALIGN(pitch * sizes->surface_height, PAGE_SIZE); 	/* Allocate the framebuffer in the GTT with stolen page backing */	backing = psb_gem_create(dev, size, "fb", true, PAGE_SIZE);	if (IS_ERR(backing)) {		ret = PTR_ERR(backing);		if (ret == -EBUSY && sizes->surface_bpp > 16) {			/*			 * If the mode does not fit in 32 bit then switch to 16 bit to			 * get a console on full resolution. User-space compositors will			 * allocate their own 32-bit framebuffers.			 */			sizes->surface_bpp = 16;			sizes->surface_depth = 16;			goto try_psb_gem_create;		}		return ret;	}	obj = &backing->base; 	ret = drm_gem_handle_create(file, obj, &handle);	if (ret)		goto err_drm_gem_object_put; 	buffer = drm_client_buffer_create(client, sizes->surface_width, sizes->surface_height,					  fourcc, handle, pitch);	if (IS_ERR(buffer)) {		ret = PTR_ERR(buffer);		goto err_drm_gem_handle_delete;	} 	fb_helper->funcs = &psb_fbdev_fb_helper_funcs;	fb_helper->buffer = buffer;	fb_helper->fb = buffer->fb; 	info->fbops = &psb_fbdev_fb_ops; 	/* Accessed stolen memory directly */	info->screen_base = dev_priv->vram_addr + backing->offset;	info->screen_size = obj->size; 	drm_fb_helper_fill_info(info, fb_helper, sizes); 	info->fix.smem_start = dev_priv->stolen_base + backing->offset;	info->fix.smem_len = obj->size;	info->fix.ywrapstep = 0;	info->fix.ypanstep = 0;	info->fix.mmio_start = pci_resource_start(pdev, 0);	info->fix.mmio_len = pci_resource_len(pdev, 0); 	fb_memset_io(info->screen_base, 0, info->screen_size); 	/* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */ 	dev_dbg(dev->dev, "allocated %dx%d fb\n", buffer->fb->width, buffer->fb->height); 	/* The handle is only needed for creating the framebuffer.*/	drm_gem_handle_delete(file, handle); 	/* The framebuffer still holds a references on the GEM object. */	drm_gem_object_put(obj); 	return 0; err_drm_gem_handle_delete:	drm_gem_handle_delete(file, handle);err_drm_gem_object_put:	drm_gem_object_put(obj);	return ret;}