// SPDX-License-Identifier: GPL-2.0-only /************************************************************************** * Copyright (c) 2007-2011, Intel Corporation. * All Rights Reserved. * **************************************************************************/ #include #include #include #include #include #include #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_to_pfn_t(pfn, PFN_DEV)); 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 */ #define CMAP_TOHW(_val, _width) ((((_val) << (_width)) + 0x7FFF - (_val)) >> 16) static int psb_fbdev_fb_setcolreg(unsigned int regno, unsigned int red, unsigned int green, unsigned int blue, unsigned int transp, struct fb_info *info) { struct drm_fb_helper *fb_helper = info->par; struct drm_framebuffer *fb = fb_helper->fb; uint32_t v; if (!fb) return -ENOMEM; if (regno > 255) return 1; red = CMAP_TOHW(red, info->var.red.length); blue = CMAP_TOHW(blue, info->var.blue.length); green = CMAP_TOHW(green, info->var.green.length); transp = CMAP_TOHW(transp, info->var.transp.length); v = (red << info->var.red.offset) | (green << info->var.green.offset) | (blue << info->var.blue.offset) | (transp << info->var.transp.offset); if (regno < 16) { switch (fb->format->cpp[0] * 8) { case 16: ((uint32_t *) info->pseudo_palette)[regno] = v; break; case 24: case 32: ((uint32_t *) info->pseudo_palette)[regno] = v; break; } } return 0; } 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; struct drm_framebuffer *fb = fb_helper->fb; struct drm_gem_object *obj = fb->obj[0]; drm_fb_helper_fini(fb_helper); drm_framebuffer_unregister_private(fb); fb->obj[0] = NULL; drm_framebuffer_cleanup(fb); kfree(fb); drm_gem_object_put(obj); drm_client_release(&fb_helper->client); drm_fb_helper_unprepare(fb_helper); kfree(fb_helper); } static const struct fb_ops psb_fbdev_fb_ops = { .owner = THIS_MODULE, __FB_DEFAULT_IO_OPS_RDWR, DRM_FB_HELPER_DEFAULT_OPS, .fb_setcolreg = psb_fbdev_fb_setcolreg, __FB_DEFAULT_IO_OPS_DRAW, .fb_mmap = psb_fbdev_fb_mmap, .fb_destroy = psb_fbdev_fb_destroy, }; /* * struct drm_fb_helper_funcs */ static int psb_fbdev_fb_probe(struct drm_fb_helper *fb_helper, struct drm_fb_helper_surface_size *sizes) { struct drm_device *dev = fb_helper->dev; struct drm_psb_private *dev_priv = to_drm_psb_private(dev); struct pci_dev *pdev = to_pci_dev(dev->dev); struct fb_info *info; struct drm_framebuffer *fb; struct drm_mode_fb_cmd2 mode_cmd = { }; int size; int ret; struct psb_gem_object *backing; struct drm_gem_object *obj; u32 bpp, depth; /* No 24-bit packed mode */ if (sizes->surface_bpp == 24) { sizes->surface_bpp = 32; sizes->surface_depth = 24; } bpp = sizes->surface_bpp; depth = sizes->surface_depth; /* * If the mode does not fit in 32 bit then switch to 16 bit to get * a console on full resolution. The X mode setting server will * allocate its own 32-bit GEM framebuffer. */ size = ALIGN(sizes->surface_width * DIV_ROUND_UP(bpp, 8), 64) * sizes->surface_height; size = ALIGN(size, PAGE_SIZE); if (size > dev_priv->vram_stolen_size) { sizes->surface_bpp = 16; sizes->surface_depth = 16; } bpp = sizes->surface_bpp; depth = sizes->surface_depth; mode_cmd.width = sizes->surface_width; mode_cmd.height = sizes->surface_height; mode_cmd.pitches[0] = ALIGN(mode_cmd.width * DIV_ROUND_UP(bpp, 8), 64); mode_cmd.pixel_format = drm_mode_legacy_fb_format(bpp, depth); size = mode_cmd.pitches[0] * mode_cmd.height; size = ALIGN(size, 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)) return PTR_ERR(backing); obj = &backing->base; fb = psb_framebuffer_create(dev, &mode_cmd, obj); if (IS_ERR(fb)) { ret = PTR_ERR(fb); goto err_drm_gem_object_put; } fb_helper->fb = fb; info = drm_fb_helper_alloc_info(fb_helper); if (IS_ERR(info)) { ret = PTR_ERR(info); goto err_drm_framebuffer_unregister_private; } info->fbops = &psb_fbdev_fb_ops; info->flags = FBINFO_DEFAULT; /* Accessed stolen memory directly */ info->screen_base = dev_priv->vram_addr + backing->offset; info->screen_size = size; drm_fb_helper_fill_info(info, fb_helper, sizes); info->fix.smem_start = dev_priv->stolen_base + backing->offset; info->fix.smem_len = 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", fb->width, fb->height); return 0; err_drm_framebuffer_unregister_private: drm_framebuffer_unregister_private(fb); fb->obj[0] = NULL; drm_framebuffer_cleanup(fb); kfree(fb); err_drm_gem_object_put: drm_gem_object_put(obj); return ret; } static const struct drm_fb_helper_funcs psb_fbdev_fb_helper_funcs = { .fb_probe = psb_fbdev_fb_probe, }; /* * struct drm_client_funcs and setup code */ static void psb_fbdev_client_unregister(struct drm_client_dev *client) { struct drm_fb_helper *fb_helper = drm_fb_helper_from_client(client); if (fb_helper->info) { drm_fb_helper_unregister_info(fb_helper); } else { drm_fb_helper_unprepare(fb_helper); drm_client_release(&fb_helper->client); kfree(fb_helper); } } static int psb_fbdev_client_restore(struct drm_client_dev *client) { drm_fb_helper_lastclose(client->dev); return 0; } static int psb_fbdev_client_hotplug(struct drm_client_dev *client) { struct drm_fb_helper *fb_helper = drm_fb_helper_from_client(client); struct drm_device *dev = client->dev; int ret; if (dev->fb_helper) return drm_fb_helper_hotplug_event(dev->fb_helper); ret = drm_fb_helper_init(dev, fb_helper); if (ret) goto err_drm_err; if (!drm_drv_uses_atomic_modeset(dev)) drm_helper_disable_unused_functions(dev); ret = drm_fb_helper_initial_config(fb_helper); if (ret) goto err_drm_fb_helper_fini; return 0; err_drm_fb_helper_fini: drm_fb_helper_fini(fb_helper); err_drm_err: drm_err(dev, "Failed to setup gma500 fbdev emulation (ret=%d)\n", ret); return ret; } static const struct drm_client_funcs psb_fbdev_client_funcs = { .owner = THIS_MODULE, .unregister = psb_fbdev_client_unregister, .restore = psb_fbdev_client_restore, .hotplug = psb_fbdev_client_hotplug, }; void psb_fbdev_setup(struct drm_psb_private *dev_priv) { struct drm_device *dev = &dev_priv->dev; struct drm_fb_helper *fb_helper; int ret; fb_helper = kzalloc(sizeof(*fb_helper), GFP_KERNEL); if (!fb_helper) return; drm_fb_helper_prepare(dev, fb_helper, 32, &psb_fbdev_fb_helper_funcs); ret = drm_client_init(dev, &fb_helper->client, "fbdev-gma500", &psb_fbdev_client_funcs); if (ret) { drm_err(dev, "Failed to register client: %d\n", ret); goto err_drm_fb_helper_unprepare; } ret = psb_fbdev_client_hotplug(&fb_helper->client); if (ret) drm_dbg_kms(dev, "client hotplug ret=%d\n", ret); drm_client_register(&fb_helper->client); return; err_drm_fb_helper_unprepare: drm_fb_helper_unprepare(fb_helper); kfree(fb_helper); }