From 4352b8aee98005853aa63f57d6377282de17a33f Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sun, 23 Aug 2026 13:28:57 -0700 Subject: Merge tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux Pull I3C updates from Alexandre Belloni: "A new driver this cycle, for the AMD AXI I3C controller. There are also new features such as IBI wakeup support, SETAASA device discovery and ACPI support for the the DAA methods, meaning we can now communicate with the SPD devices on DDR5 modules. New driver: - AMD AXI I3C master controller Subsystem: - I3C Common Command Code (CCC) handling improvements, especially around GET CCCs - SETAASA device discovery support - ACPI support for all existing DAA methods like SETDASA, SETNEWDA as well as I2C devices on I3C bus - IBI-based wakeup support Drivers: - dw: SETAASA support - mipi-i3c-hci: advertise IBI wakeup capability, AMD_PT I3C controller support, PIO queue management support for HCI v1.2 - renesas: improve suspend to RAM support, add runtime PM support" * tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux: (70 commits) i3c: dw: reduce do_daa time if there's no client i3c: mipi-i3c-hci: Add support for AMD_PT I3C controller i3c: mipi-i3c-hci: Add PIO queue management support for HCI v1.2 i3c: mipi-i3c-hci: Fix missing STAT_IBI_STATUS_THLD in PIO mode i3c: dw: rename "pclk" to "apb" to match dt-binding i3c: dw: make struct dw_i3c_cmd smaller i3c: dw: use COMMAND_PORT_TRANSFER_ARG instead of hardcoding i3c: renesas: Don't register devices when ENTDAA times out i3c: master: dw-i3c-master: fix OD timing for first broadcast i3c: mipi-i3c-hci: Advertise IBI wakeup capability i3c: mipi-i3c-hci: Factor out i3c_hci_sysdev() i3c: mipi-i3c-hci-pci: Propagate I3C wakeup requirements to PCI i3c: master: Reject IBI requests from non-IBI-capable devices i3c: master: Add helper to query bus wakeup requirements i3c: master: Report wakeup events for IBIs i3c: master: Support IBI-based wakeup capability i3c: master: Fix potential UAF in i3c_device_match() i3c: master: Fix potential UAF in i3c_device_uevent() i3c: Make dev->desc locking assumptions explicit i3c: master: Fix use-after-free of master->this ... --- drivers/video/fbdev/sbuslib.c | 288 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 288 insertions(+) create mode 100644 drivers/video/fbdev/sbuslib.c (limited to 'drivers/video/fbdev/sbuslib.c') diff --git a/drivers/video/fbdev/sbuslib.c b/drivers/video/fbdev/sbuslib.c new file mode 100644 index 000000000..dd2002d08 --- /dev/null +++ b/drivers/video/fbdev/sbuslib.c @@ -0,0 +1,288 @@ +// SPDX-License-Identifier: GPL-2.0 +/* sbuslib.c: Helper library for SBUS framebuffer drivers. + * + * Copyright (C) 2003 David S. Miller (davem@redhat.com) + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#include "sbuslib.h" + +void sbusfb_fill_var(struct fb_var_screeninfo *var, struct device_node *dp, + int bpp) +{ + memset(var, 0, sizeof(*var)); + + var->xres = of_getintprop_default(dp, "width", 1152); + var->yres = of_getintprop_default(dp, "height", 900); + var->xres_virtual = var->xres; + var->yres_virtual = var->yres; + var->bits_per_pixel = bpp; +} + +EXPORT_SYMBOL(sbusfb_fill_var); + +static unsigned long sbusfb_mmapsize(long size, unsigned long fbsize) +{ + if (size == SBUS_MMAP_EMPTY) return 0; + if (size >= 0) return size; + return fbsize * (-size); +} + +int sbusfb_mmap_helper(const struct sbus_mmap_map *map, + unsigned long physbase, + unsigned long fbsize, + unsigned long iospace, + struct vm_area_struct *vma) +{ + unsigned int size, page, r, map_size; + unsigned long map_offset = 0; + unsigned long off; + int i; + + if (!(vma->vm_flags & (VM_SHARED | VM_MAYSHARE))) + return -EINVAL; + + size = vma->vm_end - vma->vm_start; + if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) + return -EINVAL; + + off = vma->vm_pgoff << PAGE_SHIFT; + + /* VM_IO | VM_DONTEXPAND | VM_DONTDUMP are set by remap_pfn_range() */ + + vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot); + vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); + + /* Each page, see which map applies */ + for (page = 0; page < size; ){ + map_size = 0; + for (i = 0; map[i].size; i++) + if (map[i].voff == off+page) { + map_size = sbusfb_mmapsize(map[i].size, fbsize); +#ifdef __sparc_v9__ +#define POFF_MASK (PAGE_MASK|0x1UL) +#else +#define POFF_MASK (PAGE_MASK) +#endif + map_offset = (physbase + map[i].poff) & POFF_MASK; + break; + } + if (!map_size) { + page += PAGE_SIZE; + continue; + } + if (page + map_size > size) + map_size = size - page; + r = io_remap_pfn_range(vma, + vma->vm_start + page, + MK_IOSPACE_PFN(iospace, + map_offset >> PAGE_SHIFT), + map_size, + vma->vm_page_prot); + if (r) + return -EAGAIN; + page += map_size; + } + + return 0; +} +EXPORT_SYMBOL(sbusfb_mmap_helper); + +int sbusfb_ioctl_helper(unsigned long cmd, unsigned long arg, + struct fb_info *info, + int type, int fb_depth, unsigned long fb_size) +{ + switch(cmd) { + case FBIOGTYPE: { + struct fbtype __user *f = (struct fbtype __user *) arg; + + if (put_user(type, &f->fb_type) || + put_user(info->var.yres, &f->fb_height) || + put_user(info->var.xres, &f->fb_width) || + put_user(fb_depth, &f->fb_depth) || + put_user(0, &f->fb_cmsize) || + put_user(fb_size, &f->fb_cmsize)) + return -EFAULT; + return 0; + } + case FBIOPUTCMAP_SPARC: { + struct fbcmap __user *c = (struct fbcmap __user *) arg; + struct fb_cmap cmap; + u16 red, green, blue; + u8 red8, green8, blue8; + unsigned char __user *ured; + unsigned char __user *ugreen; + unsigned char __user *ublue; + unsigned int index, count, i; + + if (get_user(index, &c->index) || + get_user(count, &c->count) || + get_user(ured, &c->red) || + get_user(ugreen, &c->green) || + get_user(ublue, &c->blue)) + return -EFAULT; + + cmap.len = 1; + cmap.red = &red; + cmap.green = &green; + cmap.blue = &blue; + cmap.transp = NULL; + for (i = 0; i < count; i++) { + int err; + + if (get_user(red8, &ured[i]) || + get_user(green8, &ugreen[i]) || + get_user(blue8, &ublue[i])) + return -EFAULT; + + red = red8 << 8; + green = green8 << 8; + blue = blue8 << 8; + + cmap.start = index + i; + err = fb_set_cmap(&cmap, info); + if (err) + return err; + } + return 0; + } + case FBIOGETCMAP_SPARC: { + struct fbcmap __user *c = (struct fbcmap __user *) arg; + unsigned char __user *ured; + unsigned char __user *ugreen; + unsigned char __user *ublue; + struct fb_cmap *cmap = &info->cmap; + unsigned int index, count, i; + u8 red, green, blue; + + if (get_user(index, &c->index) || + get_user(count, &c->count) || + get_user(ured, &c->red) || + get_user(ugreen, &c->green) || + get_user(ublue, &c->blue)) + return -EFAULT; + + if (index > cmap->len || count > cmap->len - index) + return -EINVAL; + + for (i = 0; i < count; i++) { + red = cmap->red[index + i] >> 8; + green = cmap->green[index + i] >> 8; + blue = cmap->blue[index + i] >> 8; + if (put_user(red, &ured[i]) || + put_user(green, &ugreen[i]) || + put_user(blue, &ublue[i])) + return -EFAULT; + } + return 0; + } + default: + return -EINVAL; + } +} +EXPORT_SYMBOL(sbusfb_ioctl_helper); + +#ifdef CONFIG_COMPAT +int sbusfb_compat_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg) +{ + switch (cmd) { + case FBIOGTYPE: + case FBIOSATTR: + case FBIOGATTR: + case FBIOSVIDEO: + case FBIOGVIDEO: + case FBIOSCURSOR32: + case FBIOGCURSOR32: /* This is not implemented yet. + Later it should be converted... */ + case FBIOSCURPOS: + case FBIOGCURPOS: + case FBIOGCURMAX: + return info->fbops->fb_ioctl(info, cmd, arg); + case FBIOPUTCMAP32: + case FBIOPUTCMAP_SPARC: { + struct fbcmap32 c; + struct fb_cmap cmap; + u16 red, green, blue; + u8 red8, green8, blue8; + unsigned char __user *ured; + unsigned char __user *ugreen; + unsigned char __user *ublue; + unsigned int i; + + if (copy_from_user(&c, compat_ptr(arg), sizeof(c))) + return -EFAULT; + ured = compat_ptr(c.red); + ugreen = compat_ptr(c.green); + ublue = compat_ptr(c.blue); + + cmap.len = 1; + cmap.red = &red; + cmap.green = &green; + cmap.blue = &blue; + cmap.transp = NULL; + for (i = 0; i < c.count; i++) { + int err; + + if (get_user(red8, &ured[i]) || + get_user(green8, &ugreen[i]) || + get_user(blue8, &ublue[i])) + return -EFAULT; + + red = red8 << 8; + green = green8 << 8; + blue = blue8 << 8; + + cmap.start = c.index + i; + err = fb_set_cmap(&cmap, info); + if (err) + return err; + } + return 0; + } + case FBIOGETCMAP32: { + struct fbcmap32 c; + unsigned char __user *ured; + unsigned char __user *ugreen; + unsigned char __user *ublue; + struct fb_cmap *cmap = &info->cmap; + unsigned int index, i; + u8 red, green, blue; + + if (copy_from_user(&c, compat_ptr(arg), sizeof(c))) + return -EFAULT; + index = c.index; + ured = compat_ptr(c.red); + ugreen = compat_ptr(c.green); + ublue = compat_ptr(c.blue); + + if (index > cmap->len || c.count > cmap->len - index) + return -EINVAL; + + for (i = 0; i < c.count; i++) { + red = cmap->red[index + i] >> 8; + green = cmap->green[index + i] >> 8; + blue = cmap->blue[index + i] >> 8; + if (put_user(red, &ured[i]) || + put_user(green, &ugreen[i]) || + put_user(blue, &ublue[i])) + return -EFAULT; + } + return 0; + } + default: + return -ENOIOCTLCMD; + } +} +EXPORT_SYMBOL(sbusfb_compat_ioctl); +#endif -- cgit v1.3.1