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[netdrvr starfire] fix highmem and broken firmware issues

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Unfortunately, [your patch] might address the crash but doesn't address
the real problem. It turns out that the problem is one of padding
(the firmware cksum engine works only on 32-bit chunks, yuck), so
the special casing for length == 1 wasn't sufficient anyway.

This patch addresses the issue, as well the other issue of i386 +
CONFIG_HIGHMEM being broken. It is pretty much the same workaround
that Adaptec themselves used in their Windows driver. I have yet to
check if it fixes the problem when the skb is non-linear, but this
patch _will_ solve the problem for 99% of the users out there (those
not using sendfile).

Signed-off-by: Ion Badulescu <ionut@badula.org>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
This commit is contained in:
Ion Badulescu 2005-10-03 22:31:36 -04:00 committed by Jeff Garzik
parent 32fa2bfcf8
commit 67974231d4
1 changed files with 24 additions and 22 deletions
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46
drivers/net/starfire.c
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@ -133,14 +133,18 @@
- finally added firmware (GPL'ed by Adaptec)
- removed compatibility code for 2.2.x
LK1.4.2.1 (Ion Badulescu)
- fixed 32/64 bit issues on i386 + CONFIG_HIGHMEM
- added 32-bit padding to outgoing skb's, removed previous workaround
TODO: - fix forced speed/duplexing code (broken a long time ago, when
somebody converted the driver to use the generic MII code)
- fix VLAN support
*/
#define DRV_NAME "starfire"
#define DRV_VERSION "1.03+LK1.4.2"
#define DRV_RELDATE "January 19, 2005"
#define DRV_VERSION "1.03+LK1.4.2.1"
#define DRV_RELDATE "October 3, 2005"
#include <linux/config.h>
#include <linux/version.h>
@ -165,6 +169,14 @@ TODO: - fix forced speed/duplexing code (broken a long time ago, when
* of length 1. If and when this is fixed, the #define below can be removed.
*/
#define HAS_BROKEN_FIRMWARE
/*
* If using the broken firmware, data must be padded to the next 32-bit boundary.
*/
#ifdef HAS_BROKEN_FIRMWARE
#define PADDING_MASK 3
#endif
/*
* Define this if using the driver with the zero-copy patch
*/
@ -257,9 +269,10 @@ static int full_duplex[MAX_UNITS] = {0, };
* This SUCKS.
* We need a much better method to determine if dma_addr_t is 64-bit.
*/
#if (defined(__i386__) && defined(CONFIG_HIGHMEM) && (LINUX_VERSION_CODE > 0x20500 || defined(CONFIG_HIGHMEM64G))) || defined(__x86_64__) || defined (__ia64__) || defined(__mips64__) || (defined(__mips__) && defined(CONFIG_HIGHMEM) && defined(CONFIG_64BIT_PHYS_ADDR))
#if (defined(__i386__) && defined(CONFIG_HIGHMEM64G)) || defined(__x86_64__) || defined (__ia64__) || defined(__mips64__) || (defined(__mips__) && defined(CONFIG_HIGHMEM) && defined(CONFIG_64BIT_PHYS_ADDR))
/* 64-bit dma_addr_t */
#define ADDR_64BITS /* This chip uses 64 bit addresses. */
#define netdrv_addr_t u64
#define cpu_to_dma(x) cpu_to_le64(x)
#define dma_to_cpu(x) le64_to_cpu(x)
#define RX_DESC_Q_ADDR_SIZE RxDescQAddr64bit
@ -268,6 +281,7 @@ static int full_duplex[MAX_UNITS] = {0, };
#define TX_COMPL_Q_ADDR_SIZE TxComplQAddr64bit
#define RX_DESC_ADDR_SIZE RxDescAddr64bit
#else /* 32-bit dma_addr_t */
#define netdrv_addr_t u32
#define cpu_to_dma(x) cpu_to_le32(x)
#define dma_to_cpu(x) le32_to_cpu(x)
#define RX_DESC_Q_ADDR_SIZE RxDescQAddr32bit
@ -1333,21 +1347,10 @@ static int start_tx(struct sk_buff *skb, struct net_device *dev)
}
#if defined(ZEROCOPY) && defined(HAS_BROKEN_FIRMWARE)
{
int has_bad_length = 0;
if (skb_first_frag_len(skb) == 1)
has_bad_length = 1;
else {
for (i = 0; i < skb_shinfo(skb)->nr_frags; i++)
if (skb_shinfo(skb)->frags[i].size == 1) {
has_bad_length = 1;
break;
}
}
if (has_bad_length)
skb_checksum_help(skb, 0);
if (skb->ip_summed == CHECKSUM_HW) {
skb = skb_padto(skb, (skb->len + PADDING_MASK) & ~PADDING_MASK);
if (skb == NULL)
return NETDEV_TX_OK;
}
#endif /* ZEROCOPY && HAS_BROKEN_FIRMWARE */
@ -2127,13 +2130,12 @@ static int __init starfire_init (void)
#endif
#endif
#ifndef ADDR_64BITS
/* we can do this test only at run-time... sigh */
if (sizeof(dma_addr_t) == sizeof(u64)) {
printk("This driver has not been ported to this 64-bit architecture yet\n");
if (sizeof(dma_addr_t) != sizeof(netdrv_addr_t)) {
printk("This driver has dma_addr_t issues, please send email to maintainer\n");
return -ENODEV;
}
#endif /* not ADDR_64BITS */
return pci_module_init (&starfire_driver);
}