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firewire: nosy: misc cleanups

Browse source 
Extend copyright note to 2007, c.f. Kristian's git log.

Includes:
  - replace some <asm/*.h> by <linux/*.h>
  - add required indirectly included <linux/spinlock.h>
  - order alphabetically

Coding style related changes:
  - change to utf8
  - normalize whitespace
  - normalize comment style
  - remove usages of __FUNCTION__
  - remove an unnecessary cast from void *

Const and static declarations:
  - driver_name is not const in pci_driver.name, drop const qualifier
  - driver_name can be taken from KBUILD_MODNAME
  - the global variable minors[] can and should be static
  - constify struct file_operations instance

Data types:
  - Remove unused struct member struct packet.code.  struct packet is
    only used for driver-internal bookkeeping; it does not appear on the
    wire or in DMA programs or the userspace ABI.  Hence the unused
    member .code can be removed without worries.

Preprocessor macros:
  - unroll a preprocessor macro that containd a return
  - use list_for_each_entry

Printk:
  - add missing terminating \n in some format strings

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
This commit is contained in:
Stefan Richter 2010-07-27 10:28:30 +02:00
parent 286468210d
commit b5e4772904
3 changed files with 169 additions and 186 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
drivers/firewire/nosy-user.h
View file

@ -1,8 +1,8 @@
#ifndef __nosy_user_h
#define __nosy_user_h
#include <asm/ioctl.h>
#include <asm/types.h>
#include <linux/ioctl.h>
#include <linux/types.h>
#define NOSY_IOC_GET_STATS _IOR('&', 0, struct nosy_stats)
#define NOSY_IOC_START _IO('&', 1)

176
drivers/firewire/nosy.c
View file

@ -1,7 +1,6 @@
/* -*- c-file-style: "linux" -*-
*
* nosy.c - Snoop mode driver for TI pcilynx 1394 controllers
* Copyright (C) 2002 Kristian Høgsberg
/*
* nosy - Snoop mode driver for TI PCILynx 1394 controllers
* Copyright (C) 2002-2007 Kristian Høgsberg
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@ -18,23 +17,25 @@
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/sched.h> /* required for linux/wait.h */
#include <linux/wait.h>
#include <linux/errno.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/fs.h>
#include <linux/poll.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/miscdevice.h>
#include <asm/byteorder.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/poll.h>
#include <linux/sched.h> /* required for linux/wait.h */
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/timex.h>
#include <linux/uaccess.h>
#include <linux/wait.h>
#include <asm/atomic.h>
#include <asm/io.h>
#include <asm/uaccess.h>
#include <asm/timex.h>
#include <asm/byteorder.h>
#include "nosy.h"
#include "nosy-user.h"
@ -46,7 +47,7 @@
#define error(s, args...) printk(KERN_ERR s, ## args)
#define debug(s, args...) printk(KERN_DEBUG s, ## args)
static const char driver_name[] = "nosy";
static char driver_name[] = KBUILD_MODNAME;
struct pcl_status {
unsigned int transfer_count : 13;
@ -77,8 +78,7 @@ struct pcl {
} __attribute__ ((packed));
struct packet {
unsigned int length : 16;
unsigned int code : 16;
unsigned int length;
char data[0];
};
@ -106,7 +106,6 @@ struct pcilynx {
struct miscdevice misc;
};
struct client {
struct pcilynx *lynx;
unsigned long tcode_mask;
@ -115,7 +114,7 @@ struct client {
};
#define MAX_MINORS 64
struct pcilynx *minors[MAX_MINORS];
static struct pcilynx *minors[MAX_MINORS];
static int
packet_buffer_init(struct packet_buffer *buffer, size_t capacity)
@ -158,8 +157,7 @@ packet_buffer_get(struct packet_buffer *buffer, void *data, size_t user_length)
if (copy_to_user(data, buffer->head->data, length))
return -EFAULT;
buffer->head = (struct packet *) &buffer->head->data[length];
}
else {
} else {
size_t split = end - buffer->head->data;
if (copy_to_user(data, buffer->head->data, split))
@ -169,11 +167,12 @@ packet_buffer_get(struct packet_buffer *buffer, void *data, size_t user_length)
buffer->head = (struct packet *) &buffer->data[length - split];
}
/* Decrease buffer->size as the last thing, since this is what
/*
* Decrease buffer->size as the last thing, since this is what
* keeps the interrupt from overwriting the packet we are
* retrieving from the buffer. */
atomic_sub(sizeof (struct packet) + length, &buffer->size);
* retrieving from the buffer.
*/
atomic_sub(sizeof(struct packet) + length, &buffer->size);
return length;
}
@ -186,7 +185,7 @@ packet_buffer_put(struct packet_buffer *buffer, void *data, size_t length)
buffer->total_packet_count++;
if (buffer->capacity <
atomic_read(&buffer->size) + sizeof (struct packet) + length) {
atomic_read(&buffer->size) + sizeof(struct packet) + length) {
buffer->lost_packet_count++;
return;
}
@ -197,8 +196,7 @@ packet_buffer_put(struct packet_buffer *buffer, void *data, size_t length)
if (&buffer->tail->data[length] < end) {
memcpy(buffer->tail->data, data, length);
buffer->tail = (struct packet *) &buffer->tail->data[length];
}
else {
} else {
size_t split = end - buffer->tail->data;
memcpy(buffer->tail->data, data, split);
@ -208,7 +206,7 @@ packet_buffer_put(struct packet_buffer *buffer, void *data, size_t length)
/* Finally, adjust buffer size and wake up userspace reader. */
atomic_add(sizeof (struct packet) + length, &buffer->size);
atomic_add(sizeof(struct packet) + length, &buffer->size);
wake_up_interruptible(&buffer->wait);
}
@ -230,11 +228,13 @@ reg_set_bits(struct pcilynx *lynx, int offset, u32 mask)
reg_write(lynx, offset, (reg_read(lynx, offset) | mask));
}
/* Maybe the pcl programs could be setup to just append data instead
* of using a whole packet. */
/*
* Maybe the pcl programs could be set up to just append data instead
* of using a whole packet.
*/
static inline void
run_pcl(struct pcilynx *lynx, dma_addr_t pcl_bus, int dmachan)
run_pcl(struct pcilynx *lynx, dma_addr_t pcl_bus,
int dmachan)
{
reg_write(lynx, DMA0_CURRENT_PCL + dmachan * 0x20, pcl_bus);
reg_write(lynx, DMA0_CHAN_CTRL + dmachan * 0x20,
@ -245,14 +245,12 @@ static int
set_phy_reg(struct pcilynx *lynx, int addr, int val)
{
if (addr > 15) {
debug("%s: PHY register address %d out of range",
__FUNCTION__, addr);
debug("PHY register address %d out of range\n", addr);
return -1;
}
if (val > 0xff) {
debug("%s: PHY register value %d out of range",
__FUNCTION__, val);
debug("PHY register value %d out of range\n", val);
return -1;
}
@ -358,18 +356,16 @@ nosy_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
struct client *client = file->private_data;
switch (cmd) {
case NOSY_IOC_GET_STATS: {
struct nosy_stats stats;
switch (cmd) {
case NOSY_IOC_GET_STATS:
stats.total_packet_count = client->buffer.total_packet_count;
stats.lost_packet_count = client->buffer.lost_packet_count;
if (copy_to_user((void *) arg, &stats, sizeof stats))
return -EFAULT;
else
return 0;
}
case NOSY_IOC_START:
nosy_start_snoop(client);
@ -389,7 +385,7 @@ nosy_ioctl(struct inode *inode, struct file *file,
}
}
static struct file_operations nosy_ops = {
static const struct file_operations nosy_ops = {
.owner = THIS_MODULE,
.read = nosy_read,
.ioctl = nosy_ioctl,
@ -412,7 +408,6 @@ static void
packet_handler(struct pcilynx *lynx)
{
unsigned long flags;
struct list_head *pos;
struct client *client;
unsigned long tcode_mask;
size_t length;
@ -434,12 +429,10 @@ packet_handler(struct pcilynx *lynx)
spin_lock_irqsave(&lynx->client_list_lock, flags);
list_for_each(pos, &lynx->client_list) {
client = list_entry(pos, struct client, link);
list_for_each_entry(client, &lynx->client_list, link)
if (client->tcode_mask & tcode_mask)
packet_buffer_put(&client->buffer,
lynx->rcv_buffer, length + 4);
}
spin_unlock_irqrestore(&lynx->client_list_lock, flags);
}
@ -448,7 +441,6 @@ static void
bus_reset_handler(struct pcilynx *lynx)
{
unsigned long flags;
struct list_head *pos;
struct client *client;
struct timeval tv;
@ -456,20 +448,16 @@ bus_reset_handler(struct pcilynx *lynx)
spin_lock_irqsave(&lynx->client_list_lock, flags);
list_for_each(pos, &lynx->client_list) {
client = list_entry(pos, struct client, link);
list_for_each_entry(client, &lynx->client_list, link)
packet_buffer_put(&client->buffer, &tv.tv_usec, 4);
}
spin_unlock_irqrestore(&lynx->client_list_lock, flags);
}
static irqreturn_t
irq_handler(int irq, void *device)
{
struct pcilynx *lynx = (struct pcilynx *) device;
struct pcilynx *lynx = device;
u32 pci_int_status;
pci_int_status = reg_read(lynx, PCI_INT_STATUS);
@ -515,9 +503,9 @@ remove_card(struct pci_dev *dev)
reg_write(lynx, PCI_INT_ENABLE, 0);
free_irq(lynx->pci_device->irq, lynx);
pci_free_consistent(lynx->pci_device, sizeof (struct pcl),
pci_free_consistent(lynx->pci_device, sizeof(struct pcl),
lynx->rcv_start_pcl, lynx->rcv_start_pcl_bus);
pci_free_consistent(lynx->pci_device, sizeof (struct pcl),
pci_free_consistent(lynx->pci_device, sizeof(struct pcl),
lynx->rcv_pcl, lynx->rcv_pcl_bus);
pci_free_consistent(lynx->pci_device, PAGE_SIZE,
lynx->rcv_buffer, lynx->rcv_buffer_bus);
@ -532,34 +520,29 @@ remove_card(struct pci_dev *dev)
#define RCV_BUFFER_SIZE (16 * 1024)
#define FAIL(s, args...) \
do { \
error(s, ## args); \
return err; \
} while (0)
static int __devinit
add_card(struct pci_dev *dev, const struct pci_device_id *unused)
{
struct pcilynx *lynx;
u32 p, end;
int err, i;
int i;
err = -ENXIO;
if (pci_set_dma_mask(dev, 0xffffffff))
FAIL("DMA address limits not supported "
"for PCILynx hardware.\n");
if (pci_enable_device(dev))
FAIL("Failed to enable PCILynx hardware.\n");
if (pci_set_dma_mask(dev, 0xffffffff)) {
error("DMA address limits not supported "
"for PCILynx hardware\n");
return -ENXIO;
}
if (pci_enable_device(dev)) {
error("Failed to enable PCILynx hardware\n");
return -ENXIO;
}
pci_set_master(dev);
err = -ENOMEM;
lynx = kzalloc(sizeof *lynx, GFP_KERNEL);
if (lynx == NULL)
FAIL("Failed to allocate control structure memory.\n");
if (lynx == NULL) {
error("Failed to allocate control structure memory\n");
return -ENOMEM;
}
lynx->pci_device = dev;
pci_set_drvdata(dev, lynx);
@ -570,19 +553,18 @@ add_card(struct pci_dev *dev, const struct pci_device_id *unused)
PCILYNX_MAX_REGISTER);
lynx->rcv_start_pcl = pci_alloc_consistent(lynx->pci_device,
sizeof(struct pcl),
&lynx->rcv_start_pcl_bus);
sizeof(struct pcl), &lynx->rcv_start_pcl_bus);
lynx->rcv_pcl = pci_alloc_consistent(lynx->pci_device,
sizeof(struct pcl),
&lynx->rcv_pcl_bus);
lynx->rcv_buffer = pci_alloc_consistent(lynx->pci_device, RCV_BUFFER_SIZE,
&lynx->rcv_buffer_bus);
sizeof(struct pcl), &lynx->rcv_pcl_bus);
lynx->rcv_buffer = pci_alloc_consistent(lynx->pci_device,
RCV_BUFFER_SIZE, &lynx->rcv_buffer_bus);
if (lynx->rcv_start_pcl == NULL ||
lynx->rcv_pcl == NULL ||
lynx->rcv_buffer == NULL)
lynx->rcv_buffer == NULL) {
/* FIXME: do proper error handling. */
FAIL("Failed to allocate receive buffer.\n");
error("Failed to allocate receive buffer\n");
return -ENOMEM;
}
lynx->rcv_start_pcl->next = lynx->rcv_pcl_bus;
lynx->rcv_pcl->next = PCL_NEXT_INVALID;
lynx->rcv_pcl->async_error_next = PCL_NEXT_INVALID;
@ -638,15 +620,20 @@ add_card(struct pci_dev *dev, const struct pci_device_id *unused)
run_pcl(lynx, lynx->rcv_start_pcl_bus, 0);
if (request_irq(dev->irq, irq_handler, IRQF_SHARED, driver_name, lynx))
FAIL("Failed to allocate shared interrupt %d.", dev->irq);
if (request_irq(dev->irq, irq_handler, IRQF_SHARED,
driver_name, lynx)) {
error("Failed to allocate shared interrupt %d\n", dev->irq);
return -EIO;
}
lynx->misc.parent = &dev->dev;
lynx->misc.minor = MISC_DYNAMIC_MINOR;
lynx->misc.name = "nosy";
lynx->misc.fops = &nosy_ops;
if (misc_register(&lynx->misc))
FAIL("Failed to register misc char device.");
if (misc_register(&lynx->misc)) {
error("Failed to register misc char device\n");
return -ENOMEM;
}
minors[lynx->misc.minor] = lynx;
notify("Initialized PCILynx IEEE1394 card, irq=%d\n", dev->irq);
@ -665,21 +652,19 @@ static struct pci_device_id pci_table[] __devinitdata = {
};
static struct pci_driver lynx_pci_driver = {
.name = (char *) driver_name,
.name = driver_name,
.id_table = pci_table,
.probe = add_card,
.remove = __devexit_p(remove_card),
.remove = remove_card,
};
MODULE_AUTHOR("Kristian Høgsberg");
MODULE_AUTHOR("Kristian Hoegsberg");
MODULE_DESCRIPTION("Snoop mode driver for TI pcilynx 1394 controllers");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(pci, pci_table);
static int __init nosy_init(void)
{
/* notify("Loaded %s version %s.\n", driver_name, VERSION); */
return pci_register_driver(&lynx_pci_driver);
}
@ -690,6 +675,5 @@ static void __exit nosy_cleanup(void)
notify("Unloaded %s.\n", driver_name);
}
module_init(nosy_init);
module_exit(nosy_cleanup);

9
drivers/firewire/nosy.h
View file

@ -1,4 +1,5 @@
/* Chip register definitions for PCILynx chipset. Based on pcilynx.h
/*
* Chip register definitions for PCILynx chipset. Based on pcilynx.h
* from the Linux 1394 drivers, but modified a bit so the names here
* match the specification exactly (even though they have weird names,
* like xxx_OVER_FLOW, or arbitrary abbreviations like SNTRJ for "sent
@ -118,7 +119,6 @@
#define DMA_CHAN_STAT_PKTCMPL (1<<27)
#define DMA_CHAN_STAT_SPECIALACK (1<<14)
#define DMA0_CHAN_CTRL 0x110
#define DMA1_CHAN_CTRL 0x130
#define DMA2_CHAN_CTRL 0x150
@ -160,7 +160,7 @@
#define DMA2_WORD0_CMP_ENABLE 0xb24
#define DMA3_WORD0_CMP_ENABLE 0xb34
#define DMA4_WORD0_CMP_ENABLE 0xb44
#define DMA_WORD0_CMP_ENABLE(chan) (DMA_SREG(DMA0_WORD0_CMP_ENABLE,chan))
#define DMA_WORD0_CMP_ENABLE(chan) (DMA_SREG(DMA0_WORD0_CMP_ENABLE, chan))
#define DMA0_WORD1_CMP_VALUE 0xb08
#define DMA1_WORD1_CMP_VALUE 0xb18
@ -174,7 +174,7 @@
#define DMA2_WORD1_CMP_ENABLE 0xb2c
#define DMA3_WORD1_CMP_ENABLE 0xb3c
#define DMA4_WORD1_CMP_ENABLE 0xb4c
#define DMA_WORD1_CMP_ENABLE(chan) (DMA_SREG(DMA0_WORD1_CMP_ENABLE,chan))
#define DMA_WORD1_CMP_ENABLE(chan) (DMA_SREG(DMA0_WORD1_CMP_ENABLE, chan))
/* word 1 compare enable flags */
#define DMA_WORD1_CMP_MATCH_OTHERBUS (1<<15)
#define DMA_WORD1_CMP_MATCH_BROADCAST (1<<14)
@ -211,7 +211,6 @@
#define LINK_PHY_WDATA(data) (data<<16)
#define LINK_PHY_RADDR(addr) (addr<<8)
#define LINK_INT_STATUS 0xf14
#define LINK_INT_ENABLE 0xf18
/* status and enable have identical bit numbers */