linux/drivers/net/arcnet/arc-rimi.c
Tejun Heo 5a0e3ad6af include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
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>
2010-03-30 22:02:32 +09:00

397 lines
11 KiB
C

/*
* Linux ARCnet driver - "RIM I" (entirely mem-mapped) cards
*
* Written 1994-1999 by Avery Pennarun.
* Written 1999-2000 by Martin Mares <mj@ucw.cz>.
* Derived from skeleton.c by Donald Becker.
*
* Special thanks to Contemporary Controls, Inc. (www.ccontrols.com)
* for sponsoring the further development of this driver.
*
* **********************
*
* The original copyright of skeleton.c was as follows:
*
* skeleton.c Written 1993 by Donald Becker.
* Copyright 1993 United States Government as represented by the
* Director, National Security Agency. This software may only be used
* and distributed according to the terms of the GNU General Public License as
* modified by SRC, incorporated herein by reference.
*
* **********************
*
* For more details, see drivers/net/arcnet.c
*
* **********************
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/bootmem.h>
#include <linux/init.h>
#include <asm/io.h>
#include <linux/arcdevice.h>
#define VERSION "arcnet: RIM I (entirely mem-mapped) support\n"
/* Internal function declarations */
static int arcrimi_probe(struct net_device *dev);
static int arcrimi_found(struct net_device *dev);
static void arcrimi_command(struct net_device *dev, int command);
static int arcrimi_status(struct net_device *dev);
static void arcrimi_setmask(struct net_device *dev, int mask);
static int arcrimi_reset(struct net_device *dev, int really_reset);
static void arcrimi_copy_to_card(struct net_device *dev, int bufnum, int offset,
void *buf, int count);
static void arcrimi_copy_from_card(struct net_device *dev, int bufnum, int offset,
void *buf, int count);
/* Handy defines for ARCnet specific stuff */
/* Amount of I/O memory used by the card */
#define BUFFER_SIZE (512)
#define MIRROR_SIZE (BUFFER_SIZE*4)
/* COM 9026 controller chip --> ARCnet register addresses */
#define _INTMASK (ioaddr+0) /* writable */
#define _STATUS (ioaddr+0) /* readable */
#define _COMMAND (ioaddr+1) /* writable, returns random vals on read (?) */
#define _RESET (ioaddr+8) /* software reset (on read) */
#define _MEMDATA (ioaddr+12) /* Data port for IO-mapped memory */
#define _ADDR_HI (ioaddr+15) /* Control registers for said */
#define _ADDR_LO (ioaddr+14)
#define _CONFIG (ioaddr+2) /* Configuration register */
#undef ASTATUS
#undef ACOMMAND
#undef AINTMASK
#define ASTATUS() readb(_STATUS)
#define ACOMMAND(cmd) writeb((cmd),_COMMAND)
#define AINTMASK(msk) writeb((msk),_INTMASK)
#define SETCONF() writeb(lp->config,_CONFIG)
/*
* We cannot probe for a RIM I card; one reason is I don't know how to reset
* them. In fact, we can't even get their node ID automatically. So, we
* need to be passed a specific shmem address, IRQ, and node ID.
*/
static int __init arcrimi_probe(struct net_device *dev)
{
BUGLVL(D_NORMAL) printk(VERSION);
BUGLVL(D_NORMAL) printk("E-mail me if you actually test the RIM I driver, please!\n");
BUGMSG(D_NORMAL, "Given: node %02Xh, shmem %lXh, irq %d\n",
dev->dev_addr[0], dev->mem_start, dev->irq);
if (dev->mem_start <= 0 || dev->irq <= 0) {
BUGMSG(D_NORMAL, "No autoprobe for RIM I; you "
"must specify the shmem and irq!\n");
return -ENODEV;
}
if (dev->dev_addr[0] == 0) {
BUGMSG(D_NORMAL, "You need to specify your card's station "
"ID!\n");
return -ENODEV;
}
/*
* Grab the memory region at mem_start for MIRROR_SIZE bytes.
* Later in arcrimi_found() the real size will be determined
* and this reserve will be released and the correct size
* will be taken.
*/
if (!request_mem_region(dev->mem_start, MIRROR_SIZE, "arcnet (90xx)")) {
BUGMSG(D_NORMAL, "Card memory already allocated\n");
return -ENODEV;
}
return arcrimi_found(dev);
}
static int check_mirror(unsigned long addr, size_t size)
{
void __iomem *p;
int res = -1;
if (!request_mem_region(addr, size, "arcnet (90xx)"))
return -1;
p = ioremap(addr, size);
if (p) {
if (readb(p) == TESTvalue)
res = 1;
else
res = 0;
iounmap(p);
}
release_mem_region(addr, size);
return res;
}
/*
* Set up the struct net_device associated with this card. Called after
* probing succeeds.
*/
static int __init arcrimi_found(struct net_device *dev)
{
struct arcnet_local *lp;
unsigned long first_mirror, last_mirror, shmem;
void __iomem *p;
int mirror_size;
int err;
p = ioremap(dev->mem_start, MIRROR_SIZE);
if (!p) {
release_mem_region(dev->mem_start, MIRROR_SIZE);
BUGMSG(D_NORMAL, "Can't ioremap\n");
return -ENODEV;
}
/* reserve the irq */
if (request_irq(dev->irq, arcnet_interrupt, 0, "arcnet (RIM I)", dev)) {
iounmap(p);
release_mem_region(dev->mem_start, MIRROR_SIZE);
BUGMSG(D_NORMAL, "Can't get IRQ %d!\n", dev->irq);
return -ENODEV;
}
shmem = dev->mem_start;
writeb(TESTvalue, p);
writeb(dev->dev_addr[0], p + 1); /* actually the node ID */
/* find the real shared memory start/end points, including mirrors */
/* guess the actual size of one "memory mirror" - the number of
* bytes between copies of the shared memory. On most cards, it's
* 2k (or there are no mirrors at all) but on some, it's 4k.
*/
mirror_size = MIRROR_SIZE;
if (readb(p) == TESTvalue &&
check_mirror(shmem - MIRROR_SIZE, MIRROR_SIZE) == 0 &&
check_mirror(shmem - 2 * MIRROR_SIZE, MIRROR_SIZE) == 1)
mirror_size = 2 * MIRROR_SIZE;
first_mirror = shmem - mirror_size;
while (check_mirror(first_mirror, mirror_size) == 1)
first_mirror -= mirror_size;
first_mirror += mirror_size;
last_mirror = shmem + mirror_size;
while (check_mirror(last_mirror, mirror_size) == 1)
last_mirror += mirror_size;
last_mirror -= mirror_size;
dev->mem_start = first_mirror;
dev->mem_end = last_mirror + MIRROR_SIZE - 1;
/* initialize the rest of the device structure. */
lp = netdev_priv(dev);
lp->card_name = "RIM I";
lp->hw.command = arcrimi_command;
lp->hw.status = arcrimi_status;
lp->hw.intmask = arcrimi_setmask;
lp->hw.reset = arcrimi_reset;
lp->hw.owner = THIS_MODULE;
lp->hw.copy_to_card = arcrimi_copy_to_card;
lp->hw.copy_from_card = arcrimi_copy_from_card;
/*
* re-reserve the memory region - arcrimi_probe() alloced this reqion
* but didn't know the real size. Free that region and then re-get
* with the correct size. There is a VERY slim chance this could
* fail.
*/
iounmap(p);
release_mem_region(shmem, MIRROR_SIZE);
if (!request_mem_region(dev->mem_start,
dev->mem_end - dev->mem_start + 1,
"arcnet (90xx)")) {
BUGMSG(D_NORMAL, "Card memory already allocated\n");
goto err_free_irq;
}
lp->mem_start = ioremap(dev->mem_start, dev->mem_end - dev->mem_start + 1);
if (!lp->mem_start) {
BUGMSG(D_NORMAL, "Can't remap device memory!\n");
goto err_release_mem;
}
/* get and check the station ID from offset 1 in shmem */
dev->dev_addr[0] = readb(lp->mem_start + 1);
BUGMSG(D_NORMAL, "ARCnet RIM I: station %02Xh found at IRQ %d, "
"ShMem %lXh (%ld*%d bytes).\n",
dev->dev_addr[0],
dev->irq, dev->mem_start,
(dev->mem_end - dev->mem_start + 1) / mirror_size, mirror_size);
err = register_netdev(dev);
if (err)
goto err_unmap;
return 0;
err_unmap:
iounmap(lp->mem_start);
err_release_mem:
release_mem_region(dev->mem_start, dev->mem_end - dev->mem_start + 1);
err_free_irq:
free_irq(dev->irq, dev);
return -EIO;
}
/*
* Do a hardware reset on the card, and set up necessary registers.
*
* This should be called as little as possible, because it disrupts the
* token on the network (causes a RECON) and requires a significant delay.
*
* However, it does make sure the card is in a defined state.
*/
static int arcrimi_reset(struct net_device *dev, int really_reset)
{
struct arcnet_local *lp = netdev_priv(dev);
void __iomem *ioaddr = lp->mem_start + 0x800;
BUGMSG(D_INIT, "Resetting %s (status=%02Xh)\n", dev->name, ASTATUS());
if (really_reset) {
writeb(TESTvalue, ioaddr - 0x800); /* fake reset */
return 0;
}
ACOMMAND(CFLAGScmd | RESETclear); /* clear flags & end reset */
ACOMMAND(CFLAGScmd | CONFIGclear);
/* enable extended (512-byte) packets */
ACOMMAND(CONFIGcmd | EXTconf);
/* done! return success. */
return 0;
}
static void arcrimi_setmask(struct net_device *dev, int mask)
{
struct arcnet_local *lp = netdev_priv(dev);
void __iomem *ioaddr = lp->mem_start + 0x800;
AINTMASK(mask);
}
static int arcrimi_status(struct net_device *dev)
{
struct arcnet_local *lp = netdev_priv(dev);
void __iomem *ioaddr = lp->mem_start + 0x800;
return ASTATUS();
}
static void arcrimi_command(struct net_device *dev, int cmd)
{
struct arcnet_local *lp = netdev_priv(dev);
void __iomem *ioaddr = lp->mem_start + 0x800;
ACOMMAND(cmd);
}
static void arcrimi_copy_to_card(struct net_device *dev, int bufnum, int offset,
void *buf, int count)
{
struct arcnet_local *lp = netdev_priv(dev);
void __iomem *memaddr = lp->mem_start + 0x800 + bufnum * 512 + offset;
TIME("memcpy_toio", count, memcpy_toio(memaddr, buf, count));
}
static void arcrimi_copy_from_card(struct net_device *dev, int bufnum, int offset,
void *buf, int count)
{
struct arcnet_local *lp = netdev_priv(dev);
void __iomem *memaddr = lp->mem_start + 0x800 + bufnum * 512 + offset;
TIME("memcpy_fromio", count, memcpy_fromio(buf, memaddr, count));
}
static int node;
static int io; /* use the insmod io= irq= node= options */
static int irq;
static char device[9]; /* use eg. device=arc1 to change name */
module_param(node, int, 0);
module_param(io, int, 0);
module_param(irq, int, 0);
module_param_string(device, device, sizeof(device), 0);
MODULE_LICENSE("GPL");
static struct net_device *my_dev;
static int __init arc_rimi_init(void)
{
struct net_device *dev;
dev = alloc_arcdev(device);
if (!dev)
return -ENOMEM;
if (node && node != 0xff)
dev->dev_addr[0] = node;
dev->mem_start = io;
dev->irq = irq;
if (dev->irq == 2)
dev->irq = 9;
if (arcrimi_probe(dev)) {
free_netdev(dev);
return -EIO;
}
my_dev = dev;
return 0;
}
static void __exit arc_rimi_exit(void)
{
struct net_device *dev = my_dev;
struct arcnet_local *lp = netdev_priv(dev);
unregister_netdev(dev);
iounmap(lp->mem_start);
release_mem_region(dev->mem_start, dev->mem_end - dev->mem_start + 1);
free_irq(dev->irq, dev);
free_netdev(dev);
}
#ifndef MODULE
static int __init arcrimi_setup(char *s)
{
int ints[8];
s = get_options(s, 8, ints);
if (!ints[0])
return 1;
switch (ints[0]) {
default: /* ERROR */
printk("arcrimi: Too many arguments.\n");
case 3: /* Node ID */
node = ints[3];
case 2: /* IRQ */
irq = ints[2];
case 1: /* IO address */
io = ints[1];
}
if (*s)
snprintf(device, sizeof(device), "%s", s);
return 1;
}
__setup("arcrimi=", arcrimi_setup);
#endif /* MODULE */
module_init(arc_rimi_init)
module_exit(arc_rimi_exit)