![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>
433 lines
11 KiB
C
433 lines
11 KiB
C
/*
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* Linux ARCnet driver - COM90xx chipset (IO-mapped buffers)
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*
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* Written 1997 by David Woodhouse.
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* Written 1994-1999 by Avery Pennarun.
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* Written 1999-2000 by Martin Mares <mj@ucw.cz>.
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* Derived from skeleton.c by Donald Becker.
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*
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* Special thanks to Contemporary Controls, Inc. (www.ccontrols.com)
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* for sponsoring the further development of this driver.
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*
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* **********************
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*
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* The original copyright of skeleton.c was as follows:
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*
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* skeleton.c Written 1993 by Donald Becker.
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* Copyright 1993 United States Government as represented by the
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* Director, National Security Agency. This software may only be used
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* and distributed according to the terms of the GNU General Public License as
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* modified by SRC, incorporated herein by reference.
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*
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* **********************
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*
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* For more details, see drivers/net/arcnet.c
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*
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* **********************
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/ioport.h>
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#include <linux/delay.h>
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#include <linux/netdevice.h>
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#include <linux/bootmem.h>
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#include <linux/init.h>
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#include <asm/io.h>
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#include <linux/arcdevice.h>
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#define VERSION "arcnet: COM90xx IO-mapped mode support (by David Woodhouse et el.)\n"
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/* Internal function declarations */
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static int com90io_found(struct net_device *dev);
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static void com90io_command(struct net_device *dev, int command);
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static int com90io_status(struct net_device *dev);
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static void com90io_setmask(struct net_device *dev, int mask);
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static int com90io_reset(struct net_device *dev, int really_reset);
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static void com90io_copy_to_card(struct net_device *dev, int bufnum, int offset,
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void *buf, int count);
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static void com90io_copy_from_card(struct net_device *dev, int bufnum, int offset,
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void *buf, int count);
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/* Handy defines for ARCnet specific stuff */
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/* The number of low I/O ports used by the card. */
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#define ARCNET_TOTAL_SIZE 16
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/* COM 9026 controller chip --> ARCnet register addresses */
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#define _INTMASK (ioaddr+0) /* writable */
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#define _STATUS (ioaddr+0) /* readable */
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#define _COMMAND (ioaddr+1) /* writable, returns random vals on read (?) */
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#define _RESET (ioaddr+8) /* software reset (on read) */
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#define _MEMDATA (ioaddr+12) /* Data port for IO-mapped memory */
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#define _ADDR_HI (ioaddr+15) /* Control registers for said */
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#define _ADDR_LO (ioaddr+14)
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#define _CONFIG (ioaddr+2) /* Configuration register */
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#undef ASTATUS
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#undef ACOMMAND
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#undef AINTMASK
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#define ASTATUS() inb(_STATUS)
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#define ACOMMAND(cmd) outb((cmd),_COMMAND)
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#define AINTMASK(msk) outb((msk),_INTMASK)
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#define SETCONF() outb((lp->config),_CONFIG)
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/****************************************************************************
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* *
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* IO-mapped operation routines *
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* *
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****************************************************************************/
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#undef ONE_AT_A_TIME_TX
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#undef ONE_AT_A_TIME_RX
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static u_char get_buffer_byte(struct net_device *dev, unsigned offset)
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{
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int ioaddr = dev->base_addr;
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outb(offset >> 8, _ADDR_HI);
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outb(offset & 0xff, _ADDR_LO);
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return inb(_MEMDATA);
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}
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#ifdef ONE_AT_A_TIME_TX
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static void put_buffer_byte(struct net_device *dev, unsigned offset, u_char datum)
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{
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int ioaddr = dev->base_addr;
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outb(offset >> 8, _ADDR_HI);
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outb(offset & 0xff, _ADDR_LO);
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outb(datum, _MEMDATA);
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}
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#endif
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static void get_whole_buffer(struct net_device *dev, unsigned offset, unsigned length, char *dest)
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{
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int ioaddr = dev->base_addr;
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outb((offset >> 8) | AUTOINCflag, _ADDR_HI);
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outb(offset & 0xff, _ADDR_LO);
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while (length--)
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#ifdef ONE_AT_A_TIME_RX
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*(dest++) = get_buffer_byte(dev, offset++);
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#else
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*(dest++) = inb(_MEMDATA);
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#endif
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}
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static void put_whole_buffer(struct net_device *dev, unsigned offset, unsigned length, char *dest)
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{
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int ioaddr = dev->base_addr;
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outb((offset >> 8) | AUTOINCflag, _ADDR_HI);
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outb(offset & 0xff, _ADDR_LO);
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while (length--)
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#ifdef ONE_AT_A_TIME_TX
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put_buffer_byte(dev, offset++, *(dest++));
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#else
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outb(*(dest++), _MEMDATA);
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#endif
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}
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/*
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* We cannot probe for an IO mapped card either, although we can check that
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* it's where we were told it was, and even autoirq
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*/
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static int __init com90io_probe(struct net_device *dev)
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{
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int ioaddr = dev->base_addr, status;
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unsigned long airqmask;
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BUGLVL(D_NORMAL) printk(VERSION);
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BUGLVL(D_NORMAL) printk("E-mail me if you actually test this driver, please!\n");
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if (!ioaddr) {
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BUGMSG(D_NORMAL, "No autoprobe for IO mapped cards; you "
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"must specify the base address!\n");
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return -ENODEV;
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}
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if (!request_region(ioaddr, ARCNET_TOTAL_SIZE, "com90io probe")) {
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BUGMSG(D_INIT_REASONS, "IO request_region %x-%x failed.\n",
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ioaddr, ioaddr + ARCNET_TOTAL_SIZE - 1);
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return -ENXIO;
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}
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if (ASTATUS() == 0xFF) {
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BUGMSG(D_INIT_REASONS, "IO address %x empty\n", ioaddr);
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goto err_out;
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}
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inb(_RESET);
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mdelay(RESETtime);
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status = ASTATUS();
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if ((status & 0x9D) != (NORXflag | RECONflag | TXFREEflag | RESETflag)) {
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BUGMSG(D_INIT_REASONS, "Status invalid (%Xh).\n", status);
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goto err_out;
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}
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BUGMSG(D_INIT_REASONS, "Status after reset: %X\n", status);
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ACOMMAND(CFLAGScmd | RESETclear | CONFIGclear);
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BUGMSG(D_INIT_REASONS, "Status after reset acknowledged: %X\n", status);
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status = ASTATUS();
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if (status & RESETflag) {
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BUGMSG(D_INIT_REASONS, "Eternal reset (status=%Xh)\n", status);
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goto err_out;
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}
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outb((0x16 | IOMAPflag) & ~ENABLE16flag, _CONFIG);
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/* Read first loc'n of memory */
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outb(AUTOINCflag, _ADDR_HI);
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outb(0, _ADDR_LO);
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if ((status = inb(_MEMDATA)) != 0xd1) {
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BUGMSG(D_INIT_REASONS, "Signature byte not found"
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" (%Xh instead).\n", status);
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goto err_out;
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}
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if (!dev->irq) {
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/*
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* if we do this, we're sure to get an IRQ since the
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* card has just reset and the NORXflag is on until
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* we tell it to start receiving.
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*/
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airqmask = probe_irq_on();
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outb(NORXflag, _INTMASK);
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udelay(1);
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outb(0, _INTMASK);
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dev->irq = probe_irq_off(airqmask);
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if (dev->irq <= 0) {
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BUGMSG(D_INIT_REASONS, "Autoprobe IRQ failed\n");
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goto err_out;
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}
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}
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release_region(ioaddr, ARCNET_TOTAL_SIZE); /* end of probing */
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return com90io_found(dev);
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err_out:
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release_region(ioaddr, ARCNET_TOTAL_SIZE);
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return -ENODEV;
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}
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/* Set up the struct net_device associated with this card. Called after
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* probing succeeds.
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*/
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static int __init com90io_found(struct net_device *dev)
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{
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struct arcnet_local *lp;
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int ioaddr = dev->base_addr;
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int err;
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/* Reserve the irq */
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if (request_irq(dev->irq, arcnet_interrupt, 0, "arcnet (COM90xx-IO)", dev)) {
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BUGMSG(D_NORMAL, "Can't get IRQ %d!\n", dev->irq);
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return -ENODEV;
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}
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/* Reserve the I/O region */
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if (!request_region(dev->base_addr, ARCNET_TOTAL_SIZE, "arcnet (COM90xx-IO)")) {
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free_irq(dev->irq, dev);
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return -EBUSY;
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}
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lp = netdev_priv(dev);
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lp->card_name = "COM90xx I/O";
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lp->hw.command = com90io_command;
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lp->hw.status = com90io_status;
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lp->hw.intmask = com90io_setmask;
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lp->hw.reset = com90io_reset;
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lp->hw.owner = THIS_MODULE;
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lp->hw.copy_to_card = com90io_copy_to_card;
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lp->hw.copy_from_card = com90io_copy_from_card;
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lp->config = (0x16 | IOMAPflag) & ~ENABLE16flag;
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SETCONF();
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/* get and check the station ID from offset 1 in shmem */
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dev->dev_addr[0] = get_buffer_byte(dev, 1);
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err = register_netdev(dev);
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if (err) {
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outb((inb(_CONFIG) & ~IOMAPflag), _CONFIG);
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free_irq(dev->irq, dev);
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release_region(dev->base_addr, ARCNET_TOTAL_SIZE);
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return err;
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}
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BUGMSG(D_NORMAL, "COM90IO: station %02Xh found at %03lXh, IRQ %d.\n",
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dev->dev_addr[0], dev->base_addr, dev->irq);
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return 0;
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}
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/*
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* Do a hardware reset on the card, and set up necessary registers.
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*
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* This should be called as little as possible, because it disrupts the
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* token on the network (causes a RECON) and requires a significant delay.
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*
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* However, it does make sure the card is in a defined state.
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*/
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static int com90io_reset(struct net_device *dev, int really_reset)
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{
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struct arcnet_local *lp = netdev_priv(dev);
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short ioaddr = dev->base_addr;
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BUGMSG(D_INIT, "Resetting %s (status=%02Xh)\n", dev->name, ASTATUS());
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if (really_reset) {
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/* reset the card */
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inb(_RESET);
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mdelay(RESETtime);
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}
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/* Set the thing to IO-mapped, 8-bit mode */
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lp->config = (0x1C | IOMAPflag) & ~ENABLE16flag;
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SETCONF();
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ACOMMAND(CFLAGScmd | RESETclear); /* clear flags & end reset */
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ACOMMAND(CFLAGScmd | CONFIGclear);
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/* verify that the ARCnet signature byte is present */
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if (get_buffer_byte(dev, 0) != TESTvalue) {
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BUGMSG(D_NORMAL, "reset failed: TESTvalue not present.\n");
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return 1;
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}
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/* enable extended (512-byte) packets */
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ACOMMAND(CONFIGcmd | EXTconf);
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/* done! return success. */
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return 0;
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}
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static void com90io_command(struct net_device *dev, int cmd)
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{
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short ioaddr = dev->base_addr;
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ACOMMAND(cmd);
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}
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static int com90io_status(struct net_device *dev)
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{
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short ioaddr = dev->base_addr;
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return ASTATUS();
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}
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static void com90io_setmask(struct net_device *dev, int mask)
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{
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short ioaddr = dev->base_addr;
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AINTMASK(mask);
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}
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static void com90io_copy_to_card(struct net_device *dev, int bufnum, int offset,
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void *buf, int count)
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{
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TIME("put_whole_buffer", count, put_whole_buffer(dev, bufnum * 512 + offset, count, buf));
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}
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static void com90io_copy_from_card(struct net_device *dev, int bufnum, int offset,
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void *buf, int count)
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{
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TIME("get_whole_buffer", count, get_whole_buffer(dev, bufnum * 512 + offset, count, buf));
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}
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static int io; /* use the insmod io= irq= shmem= options */
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static int irq;
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static char device[9]; /* use eg. device=arc1 to change name */
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module_param(io, int, 0);
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module_param(irq, int, 0);
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module_param_string(device, device, sizeof(device), 0);
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MODULE_LICENSE("GPL");
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#ifndef MODULE
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static int __init com90io_setup(char *s)
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{
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int ints[4];
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s = get_options(s, 4, ints);
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if (!ints[0])
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return 0;
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switch (ints[0]) {
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default: /* ERROR */
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printk("com90io: Too many arguments.\n");
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case 2: /* IRQ */
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irq = ints[2];
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case 1: /* IO address */
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io = ints[1];
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}
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if (*s)
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snprintf(device, sizeof(device), "%s", s);
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return 1;
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}
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__setup("com90io=", com90io_setup);
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#endif
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static struct net_device *my_dev;
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static int __init com90io_init(void)
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{
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struct net_device *dev;
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int err;
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dev = alloc_arcdev(device);
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if (!dev)
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return -ENOMEM;
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dev->base_addr = io;
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dev->irq = irq;
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if (dev->irq == 2)
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dev->irq = 9;
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err = com90io_probe(dev);
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if (err) {
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free_netdev(dev);
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return err;
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}
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my_dev = dev;
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return 0;
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}
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static void __exit com90io_exit(void)
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{
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struct net_device *dev = my_dev;
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int ioaddr = dev->base_addr;
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unregister_netdev(dev);
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/* Set the thing back to MMAP mode, in case the old driver is loaded later */
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outb((inb(_CONFIG) & ~IOMAPflag), _CONFIG);
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free_irq(dev->irq, dev);
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release_region(dev->base_addr, ARCNET_TOTAL_SIZE);
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free_netdev(dev);
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}
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module_init(com90io_init)
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module_exit(com90io_exit)
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