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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196// SPDX-License-Identifier: GPL-2.0-only/************************************************************************** * Copyright (c) 2007-2011, Intel Corporation. * All Rights Reserved. * **************************************************************************/
#include <linux/fb.h>
#include <drm/clients/drm_fbdev_helper.h>#include <drm/drm_crtc_helper.h>#include <drm/drm_drv.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;}