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![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>
231 lines
5 KiB
C
231 lines
5 KiB
C
/*
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* Initialisation code for Cyrix/NatSemi VSA1 softaudio
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*
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* (C) Copyright 2003 Red Hat Inc <alan@lxorguk.ukuu.org.uk>
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*
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* XpressAudio(tm) is used on the Cyrix MediaGX (now NatSemi Geode) systems.
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* The older version (VSA1) provides fairly good soundblaster emulation
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* although there are a couple of bugs: large DMA buffers break record,
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* and the MPU event handling seems suspect. VSA2 allows the native driver
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* to control the AC97 audio engine directly and requires a different driver.
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*
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* Thanks to National Semiconductor for providing the needed information
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* on the XpressAudio(tm) internals.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2, or (at your option) any
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* later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* TO DO:
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* Investigate whether we can portably support Cognac (5520) in the
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* same manner.
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*/
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#include <linux/delay.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/slab.h>
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#include "sound_config.h"
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#include "sb.h"
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/*
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* Read a soundblaster compatible mixer register.
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* In this case we are actually reading an SMI trap
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* not real hardware.
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*/
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static u8 __devinit mixer_read(unsigned long io, u8 reg)
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{
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outb(reg, io + 4);
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udelay(20);
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reg = inb(io + 5);
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udelay(20);
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return reg;
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}
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static int __devinit probe_one(struct pci_dev *pdev, const struct pci_device_id *ent)
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{
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struct address_info *hw_config;
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unsigned long base;
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void __iomem *mem;
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unsigned long io;
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u16 map;
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u8 irq, dma8, dma16;
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int oldquiet;
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extern int sb_be_quiet;
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base = pci_resource_start(pdev, 0);
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if(base == 0UL)
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return 1;
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mem = ioremap(base, 128);
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if (!mem)
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return 1;
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map = readw(mem + 0x18); /* Read the SMI enables */
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iounmap(mem);
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/* Map bits
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0:1 * 0x20 + 0x200 = sb base
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2 sb enable
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3 adlib enable
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5 MPU enable 0x330
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6 MPU enable 0x300
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The other bits may be used internally so must be masked */
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io = 0x220 + 0x20 * (map & 3);
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if(map & (1<<2))
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printk(KERN_INFO "kahlua: XpressAudio at 0x%lx\n", io);
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else
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return 1;
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if(map & (1<<5))
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printk(KERN_INFO "kahlua: MPU at 0x300\n");
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else if(map & (1<<6))
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printk(KERN_INFO "kahlua: MPU at 0x330\n");
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irq = mixer_read(io, 0x80) & 0x0F;
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dma8 = mixer_read(io, 0x81);
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// printk("IRQ=%x MAP=%x DMA=%x\n", irq, map, dma8);
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if(dma8 & 0x20)
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dma16 = 5;
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else if(dma8 & 0x40)
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dma16 = 6;
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else if(dma8 & 0x80)
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dma16 = 7;
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else
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{
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printk(KERN_ERR "kahlua: No 16bit DMA enabled.\n");
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return 1;
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}
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if(dma8 & 0x01)
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dma8 = 0;
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else if(dma8 & 0x02)
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dma8 = 1;
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else if(dma8 & 0x08)
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dma8 = 3;
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else
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{
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printk(KERN_ERR "kahlua: No 8bit DMA enabled.\n");
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return 1;
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}
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if(irq & 1)
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irq = 9;
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else if(irq & 2)
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irq = 5;
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else if(irq & 4)
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irq = 7;
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else if(irq & 8)
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irq = 10;
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else
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{
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printk(KERN_ERR "kahlua: SB IRQ not set.\n");
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return 1;
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}
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printk(KERN_INFO "kahlua: XpressAudio on IRQ %d, DMA %d, %d\n",
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irq, dma8, dma16);
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hw_config = kzalloc(sizeof(struct address_info), GFP_KERNEL);
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if(hw_config == NULL)
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{
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printk(KERN_ERR "kahlua: out of memory.\n");
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return 1;
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}
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pci_set_drvdata(pdev, hw_config);
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hw_config->io_base = io;
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hw_config->irq = irq;
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hw_config->dma = dma8;
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hw_config->dma2 = dma16;
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hw_config->name = "Cyrix XpressAudio";
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hw_config->driver_use_1 = SB_NO_MIDI | SB_PCI_IRQ;
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if (!request_region(io, 16, "soundblaster"))
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goto err_out_free;
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if(sb_dsp_detect(hw_config, 0, 0, NULL)==0)
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{
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printk(KERN_ERR "kahlua: audio not responding.\n");
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release_region(io, 16);
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goto err_out_free;
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}
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oldquiet = sb_be_quiet;
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sb_be_quiet = 1;
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if(sb_dsp_init(hw_config, THIS_MODULE))
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{
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sb_be_quiet = oldquiet;
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goto err_out_free;
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}
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sb_be_quiet = oldquiet;
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return 0;
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err_out_free:
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pci_set_drvdata(pdev, NULL);
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kfree(hw_config);
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return 1;
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}
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static void __devexit remove_one(struct pci_dev *pdev)
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{
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struct address_info *hw_config = pci_get_drvdata(pdev);
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sb_dsp_unload(hw_config, 0);
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pci_set_drvdata(pdev, NULL);
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kfree(hw_config);
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}
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MODULE_AUTHOR("Alan Cox");
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MODULE_DESCRIPTION("Kahlua VSA1 PCI Audio");
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MODULE_LICENSE("GPL");
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/*
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* 5530 only. The 5510/5520 decode is different.
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*/
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static DEFINE_PCI_DEVICE_TABLE(id_tbl) = {
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{ PCI_VDEVICE(CYRIX, PCI_DEVICE_ID_CYRIX_5530_AUDIO), 0 },
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{ }
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};
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MODULE_DEVICE_TABLE(pci, id_tbl);
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static struct pci_driver kahlua_driver = {
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.name = "kahlua",
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.id_table = id_tbl,
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.probe = probe_one,
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.remove = __devexit_p(remove_one),
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};
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static int __init kahlua_init_module(void)
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{
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printk(KERN_INFO "Cyrix Kahlua VSA1 XpressAudio support (c) Copyright 2003 Red Hat Inc\n");
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return pci_register_driver(&kahlua_driver);
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}
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static void __devexit kahlua_cleanup_module(void)
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{
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pci_unregister_driver(&kahlua_driver);
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}
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module_init(kahlua_init_module);
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module_exit(kahlua_cleanup_module);
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