![Tejun Heo](/assets/img/avatar_default.png)
percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
405 lines
9.2 KiB
C
405 lines
9.2 KiB
C
/* bw2.c: BWTWO frame buffer driver
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*
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* Copyright (C) 2003, 2006 David S. Miller (davem@davemloft.net)
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* Copyright (C) 1996,1998 Jakub Jelinek (jj@ultra.linux.cz)
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* Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx)
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* Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be)
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*
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* Driver layout based loosely on tgafb.c, see that file for credits.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/string.h>
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#include <linux/delay.h>
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#include <linux/init.h>
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#include <linux/fb.h>
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#include <linux/mm.h>
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#include <linux/of_device.h>
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#include <asm/io.h>
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#include <asm/fbio.h>
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#include "sbuslib.h"
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/*
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* Local functions.
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*/
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static int bw2_blank(int, struct fb_info *);
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static int bw2_mmap(struct fb_info *, struct vm_area_struct *);
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static int bw2_ioctl(struct fb_info *, unsigned int, unsigned long);
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/*
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* Frame buffer operations
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*/
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static struct fb_ops bw2_ops = {
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.owner = THIS_MODULE,
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.fb_blank = bw2_blank,
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.fb_fillrect = cfb_fillrect,
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.fb_copyarea = cfb_copyarea,
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.fb_imageblit = cfb_imageblit,
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.fb_mmap = bw2_mmap,
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.fb_ioctl = bw2_ioctl,
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#ifdef CONFIG_COMPAT
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.fb_compat_ioctl = sbusfb_compat_ioctl,
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#endif
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};
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/* OBio addresses for the bwtwo registers */
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#define BWTWO_REGISTER_OFFSET 0x400000
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struct bt_regs {
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u32 addr;
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u32 color_map;
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u32 control;
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u32 cursor;
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};
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struct bw2_regs {
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struct bt_regs cmap;
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u8 control;
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u8 status;
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u8 cursor_start;
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u8 cursor_end;
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u8 h_blank_start;
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u8 h_blank_end;
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u8 h_sync_start;
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u8 h_sync_end;
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u8 comp_sync_end;
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u8 v_blank_start_high;
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u8 v_blank_start_low;
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u8 v_blank_end;
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u8 v_sync_start;
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u8 v_sync_end;
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u8 xfer_holdoff_start;
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u8 xfer_holdoff_end;
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};
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/* Status Register Constants */
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#define BWTWO_SR_RES_MASK 0x70
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#define BWTWO_SR_1600_1280 0x50
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#define BWTWO_SR_1152_900_76_A 0x40
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#define BWTWO_SR_1152_900_76_B 0x60
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#define BWTWO_SR_ID_MASK 0x0f
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#define BWTWO_SR_ID_MONO 0x02
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#define BWTWO_SR_ID_MONO_ECL 0x03
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#define BWTWO_SR_ID_MSYNC 0x04
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#define BWTWO_SR_ID_NOCONN 0x0a
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/* Control Register Constants */
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#define BWTWO_CTL_ENABLE_INTS 0x80
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#define BWTWO_CTL_ENABLE_VIDEO 0x40
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#define BWTWO_CTL_ENABLE_TIMING 0x20
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#define BWTWO_CTL_ENABLE_CURCMP 0x10
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#define BWTWO_CTL_XTAL_MASK 0x0C
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#define BWTWO_CTL_DIVISOR_MASK 0x03
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/* Status Register Constants */
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#define BWTWO_STAT_PENDING_INT 0x80
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#define BWTWO_STAT_MSENSE_MASK 0x70
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#define BWTWO_STAT_ID_MASK 0x0f
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struct bw2_par {
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spinlock_t lock;
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struct bw2_regs __iomem *regs;
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u32 flags;
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#define BW2_FLAG_BLANKED 0x00000001
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unsigned long which_io;
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};
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/**
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* bw2_blank - Optional function. Blanks the display.
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* @blank_mode: the blank mode we want.
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* @info: frame buffer structure that represents a single frame buffer
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*/
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static int
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bw2_blank(int blank, struct fb_info *info)
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{
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struct bw2_par *par = (struct bw2_par *) info->par;
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struct bw2_regs __iomem *regs = par->regs;
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unsigned long flags;
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u8 val;
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spin_lock_irqsave(&par->lock, flags);
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switch (blank) {
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case FB_BLANK_UNBLANK: /* Unblanking */
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val = sbus_readb(®s->control);
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val |= BWTWO_CTL_ENABLE_VIDEO;
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sbus_writeb(val, ®s->control);
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par->flags &= ~BW2_FLAG_BLANKED;
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break;
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case FB_BLANK_NORMAL: /* Normal blanking */
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case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */
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case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */
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case FB_BLANK_POWERDOWN: /* Poweroff */
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val = sbus_readb(®s->control);
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val &= ~BWTWO_CTL_ENABLE_VIDEO;
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sbus_writeb(val, ®s->control);
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par->flags |= BW2_FLAG_BLANKED;
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break;
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}
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spin_unlock_irqrestore(&par->lock, flags);
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return 0;
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}
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static struct sbus_mmap_map bw2_mmap_map[] = {
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{
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.size = SBUS_MMAP_FBSIZE(1)
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},
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{ .size = 0 }
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};
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static int bw2_mmap(struct fb_info *info, struct vm_area_struct *vma)
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{
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struct bw2_par *par = (struct bw2_par *)info->par;
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return sbusfb_mmap_helper(bw2_mmap_map,
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info->fix.smem_start, info->fix.smem_len,
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par->which_io,
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vma);
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}
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static int bw2_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg)
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{
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return sbusfb_ioctl_helper(cmd, arg, info,
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FBTYPE_SUN2BW, 1, info->fix.smem_len);
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}
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/*
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* Initialisation
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*/
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static void __devinit bw2_init_fix(struct fb_info *info, int linebytes)
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{
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strlcpy(info->fix.id, "bwtwo", sizeof(info->fix.id));
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info->fix.type = FB_TYPE_PACKED_PIXELS;
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info->fix.visual = FB_VISUAL_MONO01;
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info->fix.line_length = linebytes;
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info->fix.accel = FB_ACCEL_SUN_BWTWO;
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}
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static u8 bw2regs_1600[] __devinitdata = {
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0x14, 0x8b, 0x15, 0x28, 0x16, 0x03, 0x17, 0x13,
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0x18, 0x7b, 0x19, 0x05, 0x1a, 0x34, 0x1b, 0x2e,
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0x1c, 0x00, 0x1d, 0x0a, 0x1e, 0xff, 0x1f, 0x01,
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0x10, 0x21, 0
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};
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static u8 bw2regs_ecl[] __devinitdata = {
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0x14, 0x65, 0x15, 0x1e, 0x16, 0x04, 0x17, 0x0c,
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0x18, 0x5e, 0x19, 0x03, 0x1a, 0xa7, 0x1b, 0x23,
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0x1c, 0x00, 0x1d, 0x08, 0x1e, 0xff, 0x1f, 0x01,
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0x10, 0x20, 0
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};
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static u8 bw2regs_analog[] __devinitdata = {
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0x14, 0xbb, 0x15, 0x2b, 0x16, 0x03, 0x17, 0x13,
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0x18, 0xb0, 0x19, 0x03, 0x1a, 0xa6, 0x1b, 0x22,
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0x1c, 0x01, 0x1d, 0x05, 0x1e, 0xff, 0x1f, 0x01,
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0x10, 0x20, 0
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};
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static u8 bw2regs_76hz[] __devinitdata = {
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0x14, 0xb7, 0x15, 0x27, 0x16, 0x03, 0x17, 0x0f,
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0x18, 0xae, 0x19, 0x03, 0x1a, 0xae, 0x1b, 0x2a,
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0x1c, 0x01, 0x1d, 0x09, 0x1e, 0xff, 0x1f, 0x01,
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0x10, 0x24, 0
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};
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static u8 bw2regs_66hz[] __devinitdata = {
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0x14, 0xbb, 0x15, 0x2b, 0x16, 0x04, 0x17, 0x14,
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0x18, 0xae, 0x19, 0x03, 0x1a, 0xa8, 0x1b, 0x24,
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0x1c, 0x01, 0x1d, 0x05, 0x1e, 0xff, 0x1f, 0x01,
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0x10, 0x20, 0
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};
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static int __devinit bw2_do_default_mode(struct bw2_par *par,
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struct fb_info *info,
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int *linebytes)
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{
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u8 status, mon;
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u8 *p;
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status = sbus_readb(&par->regs->status);
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mon = status & BWTWO_SR_RES_MASK;
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switch (status & BWTWO_SR_ID_MASK) {
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case BWTWO_SR_ID_MONO_ECL:
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if (mon == BWTWO_SR_1600_1280) {
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p = bw2regs_1600;
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info->var.xres = info->var.xres_virtual = 1600;
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info->var.yres = info->var.yres_virtual = 1280;
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*linebytes = 1600 / 8;
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} else
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p = bw2regs_ecl;
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break;
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case BWTWO_SR_ID_MONO:
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p = bw2regs_analog;
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break;
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case BWTWO_SR_ID_MSYNC:
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if (mon == BWTWO_SR_1152_900_76_A ||
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mon == BWTWO_SR_1152_900_76_B)
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p = bw2regs_76hz;
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else
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p = bw2regs_66hz;
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break;
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case BWTWO_SR_ID_NOCONN:
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return 0;
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default:
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printk(KERN_ERR "bw2: can't handle SR %02x\n",
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status);
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return -EINVAL;
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}
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for ( ; *p; p += 2) {
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u8 __iomem *regp = &((u8 __iomem *)par->regs)[p[0]];
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sbus_writeb(p[1], regp);
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}
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return 0;
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}
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static int __devinit bw2_probe(struct of_device *op, const struct of_device_id *match)
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{
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struct device_node *dp = op->node;
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struct fb_info *info;
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struct bw2_par *par;
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int linebytes, err;
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info = framebuffer_alloc(sizeof(struct bw2_par), &op->dev);
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err = -ENOMEM;
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if (!info)
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goto out_err;
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par = info->par;
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spin_lock_init(&par->lock);
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info->fix.smem_start = op->resource[0].start;
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par->which_io = op->resource[0].flags & IORESOURCE_BITS;
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sbusfb_fill_var(&info->var, dp, 1);
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linebytes = of_getintprop_default(dp, "linebytes",
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info->var.xres);
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info->var.red.length = info->var.green.length =
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info->var.blue.length = info->var.bits_per_pixel;
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info->var.red.offset = info->var.green.offset =
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info->var.blue.offset = 0;
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par->regs = of_ioremap(&op->resource[0], BWTWO_REGISTER_OFFSET,
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sizeof(struct bw2_regs), "bw2 regs");
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if (!par->regs)
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goto out_release_fb;
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if (!of_find_property(dp, "width", NULL)) {
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err = bw2_do_default_mode(par, info, &linebytes);
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if (err)
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goto out_unmap_regs;
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}
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info->fix.smem_len = PAGE_ALIGN(linebytes * info->var.yres);
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info->flags = FBINFO_DEFAULT;
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info->fbops = &bw2_ops;
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info->screen_base = of_ioremap(&op->resource[0], 0,
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info->fix.smem_len, "bw2 ram");
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if (!info->screen_base)
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goto out_unmap_regs;
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bw2_blank(FB_BLANK_UNBLANK, info);
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bw2_init_fix(info, linebytes);
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err = register_framebuffer(info);
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if (err < 0)
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goto out_unmap_screen;
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dev_set_drvdata(&op->dev, info);
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printk(KERN_INFO "%s: bwtwo at %lx:%lx\n",
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dp->full_name, par->which_io, info->fix.smem_start);
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return 0;
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out_unmap_screen:
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of_iounmap(&op->resource[0], info->screen_base, info->fix.smem_len);
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out_unmap_regs:
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of_iounmap(&op->resource[0], par->regs, sizeof(struct bw2_regs));
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out_release_fb:
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framebuffer_release(info);
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out_err:
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return err;
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}
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static int __devexit bw2_remove(struct of_device *op)
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{
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struct fb_info *info = dev_get_drvdata(&op->dev);
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struct bw2_par *par = info->par;
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unregister_framebuffer(info);
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of_iounmap(&op->resource[0], par->regs, sizeof(struct bw2_regs));
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of_iounmap(&op->resource[0], info->screen_base, info->fix.smem_len);
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framebuffer_release(info);
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dev_set_drvdata(&op->dev, NULL);
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return 0;
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}
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static const struct of_device_id bw2_match[] = {
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{
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.name = "bwtwo",
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},
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{},
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};
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MODULE_DEVICE_TABLE(of, bw2_match);
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static struct of_platform_driver bw2_driver = {
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.name = "bw2",
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.match_table = bw2_match,
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.probe = bw2_probe,
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.remove = __devexit_p(bw2_remove),
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};
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static int __init bw2_init(void)
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{
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if (fb_get_options("bw2fb", NULL))
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return -ENODEV;
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return of_register_driver(&bw2_driver, &of_bus_type);
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}
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static void __exit bw2_exit(void)
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{
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of_unregister_driver(&bw2_driver);
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}
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module_init(bw2_init);
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module_exit(bw2_exit);
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MODULE_DESCRIPTION("framebuffer driver for BWTWO chipsets");
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MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
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MODULE_VERSION("2.0");
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MODULE_LICENSE("GPL");
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