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kernel-fxtec-pro1x/drivers/net/yellowfin.c

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Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
/* yellowfin.c: A Packet Engines G-NIC ethernet driver for linux. */
/*
Written 1997-2001 by Donald Becker.
This software may be used and distributed according to the terms of
the GNU General Public License (GPL), incorporated herein by reference.
Drivers based on or derived from this code fall under the GPL and must
retain the authorship, copyright and license notice. This file is not
a complete program and may only be used when the entire operating
system is licensed under the GPL.
This driver is for the Packet Engines G-NIC PCI Gigabit Ethernet adapter.
It also supports the Symbios Logic version of the same chip core.
The author may be reached as becker@scyld.com, or C/O
Scyld Computing Corporation
410 Severn Ave., Suite 210
Annapolis MD 21403
Support and updates available at
http://www.scyld.com/network/yellowfin.html
[netdrvr] Remove Linux-specific changelogs from several Becker template drivers When in-kernel net drivers branched from Donald Becker's vanilla driver set, in the days before BitKeeper and git, a driver changelog was maintained in the driver source code. These days, the kernel's changelog is far superior and much more accurate, so the in-driver changelogs are removed. Another relic of the Becker/kernel split was version numbering, using "foo-LKx.y.z" notation, resulting in weird version numbers like "1.17b-LK1.1.9". These drivers are for older hardware, and see few changes these days, so the version numbers were all bumped to something more simple. Finally, in xircom_tulip_cb specifically, an additional cleanup removes the always-enabled CARDBUS cpp macro. Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-06-27 05:57:22 -06:00
[link no longer provides useful info -jgarzik]
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
*/
#define DRV_NAME "yellowfin"
[PATCH] Remove more unnecessary driver printk's As I promised last week, here is the first pass at removing all unnecessary printk's that exist in network device drivers currently in promiscuous mode. The duplicate messages are not needed so they have been removed. Some of these drivers are quite old and might not need an update, but I did them all anyway. I am currently auditing the remaining conditional printk's and will send out a patch for those soon. Signed-off-by: Andy Gospodarek <andy@greyhouse.net> Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-09-11 15:39:18 -06:00
#define DRV_VERSION "2.1"
#define DRV_RELDATE "Sep 11, 2006"
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
#define PFX DRV_NAME ": "
/* The user-configurable values.
These may be modified when a driver module is loaded.*/
static int debug = 1; /* 1 normal messages, 0 quiet .. 7 verbose. */
/* Maximum events (Rx packets, etc.) to handle at each interrupt. */
static int max_interrupt_work = 20;
static int mtu;
#ifdef YF_PROTOTYPE /* Support for prototype hardware errata. */
/* System-wide count of bogus-rx frames. */
static int bogus_rx;
static int dma_ctrl = 0x004A0263; /* Constrained by errata */
static int fifo_cfg = 0x0020; /* Bypass external Tx FIFO. */
#elif defined(YF_NEW) /* A future perfect board :->. */
static int dma_ctrl = 0x00CAC277; /* Override when loading module! */
static int fifo_cfg = 0x0028;
#else
Massive net driver const-ification.
2006-03-03 19:33:57 -07:00
static const int dma_ctrl = 0x004A0263; /* Constrained by errata */
static const int fifo_cfg = 0x0020; /* Bypass external Tx FIFO. */
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
#endif
/* Set the copy breakpoint for the copy-only-tiny-frames scheme.
Setting to > 1514 effectively disables this feature. */
static int rx_copybreak;
/* Used to pass the media type, etc.
No media types are currently defined. These exist for driver
interoperability.
*/
#define MAX_UNITS 8 /* More are supported, limit only on options */
static int options[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
static int full_duplex[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
/* Do ugly workaround for GX server chipset errata. */
static int gx_fix;
/* Operational parameters that are set at compile time. */
/* Keep the ring sizes a power of two for efficiency.
Making the Tx ring too long decreases the effectiveness of channel
bonding and packet priority.
There are no ill effects from too-large receive rings. */
#define TX_RING_SIZE 16
#define TX_QUEUE_SIZE 12 /* Must be > 4 && <= TX_RING_SIZE */
#define RX_RING_SIZE 64
#define STATUS_TOTAL_SIZE TX_RING_SIZE*sizeof(struct tx_status_words)
#define TX_TOTAL_SIZE 2*TX_RING_SIZE*sizeof(struct yellowfin_desc)
#define RX_TOTAL_SIZE RX_RING_SIZE*sizeof(struct yellowfin_desc)
/* Operational parameters that usually are not changed. */
/* Time in jiffies before concluding the transmitter is hung. */
#define TX_TIMEOUT (2*HZ)
#define PKT_BUF_SZ 1536 /* Size of each temporary Rx buffer.*/
#define yellowfin_debug debug
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/mii.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/ethtool.h>
#include <linux/crc32.h>
#include <linux/bitops.h>
#include <asm/uaccess.h>
#include <asm/processor.h> /* Processor type for cache alignment. */
#include <asm/unaligned.h>
#include <asm/io.h>
/* These identify the driver base version and may not be removed. */
static char version[] __devinitdata =
KERN_INFO DRV_NAME ".c:v1.05 1/09/2001 Written by Donald Becker <becker@scyld.com>\n"
KERN_INFO " http://www.scyld.com/network/yellowfin.html\n"
KERN_INFO " (unofficial 2.4.x port, " DRV_VERSION ", " DRV_RELDATE ")\n";
MODULE_AUTHOR("Donald Becker <becker@scyld.com>");
MODULE_DESCRIPTION("Packet Engines Yellowfin G-NIC Gigabit Ethernet driver");
MODULE_LICENSE("GPL");
module_param(max_interrupt_work, int, 0);
module_param(mtu, int, 0);
module_param(debug, int, 0);
module_param(rx_copybreak, int, 0);
module_param_array(options, int, NULL, 0);
module_param_array(full_duplex, int, NULL, 0);
module_param(gx_fix, int, 0);
MODULE_PARM_DESC(max_interrupt_work, "G-NIC maximum events handled per interrupt");
MODULE_PARM_DESC(mtu, "G-NIC MTU (all boards)");
MODULE_PARM_DESC(debug, "G-NIC debug level (0-7)");
MODULE_PARM_DESC(rx_copybreak, "G-NIC copy breakpoint for copy-only-tiny-frames");
MODULE_PARM_DESC(options, "G-NIC: Bits 0-3: media type, bit 17: full duplex");
MODULE_PARM_DESC(full_duplex, "G-NIC full duplex setting(s) (1)");
MODULE_PARM_DESC(gx_fix, "G-NIC: enable GX server chipset bug workaround (0-1)");
/*
Theory of Operation
I. Board Compatibility
This device driver is designed for the Packet Engines "Yellowfin" Gigabit
drivers/net: Trim trailing whitespace Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-09-13 11:24:59 -06:00
Ethernet adapter. The G-NIC 64-bit PCI card is supported, as well as the
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
Symbios 53C885E dual function chip.
II. Board-specific settings
PCI bus devices are configured by the system at boot time, so no jumpers
need to be set on the board. The system BIOS preferably should assign the
PCI INTA signal to an otherwise unused system IRQ line.
Note: Kernel versions earlier than 1.3.73 do not support shared PCI
interrupt lines.
III. Driver operation
IIIa. Ring buffers
The Yellowfin uses the Descriptor Based DMA Architecture specified by Apple.
This is a descriptor list scheme similar to that used by the EEPro100 and
Tulip. This driver uses two statically allocated fixed-size descriptor lists
formed into rings by a branch from the final descriptor to the beginning of
the list. The ring sizes are set at compile time by RX/TX_RING_SIZE.
The driver allocates full frame size skbuffs for the Rx ring buffers at
open() time and passes the skb->data field to the Yellowfin as receive data
buffers. When an incoming frame is less than RX_COPYBREAK bytes long,
a fresh skbuff is allocated and the frame is copied to the new skbuff.
When the incoming frame is larger, the skbuff is passed directly up the
protocol stack and replaced by a newly allocated skbuff.
The RX_COPYBREAK value is chosen to trade-off the memory wasted by
using a full-sized skbuff for small frames vs. the copying costs of larger
frames. For small frames the copying cost is negligible (esp. considering
that we are pre-loading the cache with immediately useful header
information). For large frames the copying cost is non-trivial, and the
larger copy might flush the cache of useful data.
IIIC. Synchronization
The driver runs as two independent, single-threaded flows of control. One
is the send-packet routine, which enforces single-threaded use by the
dev->tbusy flag. The other thread is the interrupt handler, which is single
threaded by the hardware and other software.
The send packet thread has partial control over the Tx ring and 'dev->tbusy'
flag. It sets the tbusy flag whenever it's queuing a Tx packet. If the next
queue slot is empty, it clears the tbusy flag when finished otherwise it sets
the 'yp->tx_full' flag.
The interrupt handler has exclusive control over the Rx ring and records stats
from the Tx ring. After reaping the stats, it marks the Tx queue entry as
empty by incrementing the dirty_tx mark. Iff the 'yp->tx_full' flag is set, it
clears both the tx_full and tbusy flags.
IV. Notes
Thanks to Kim Stearns of Packet Engines for providing a pair of G-NIC boards.
Thanks to Bruce Faust of Digitalscape for providing both their SYM53C885 board
and an AlphaStation to verifty the Alpha port!
IVb. References
Yellowfin Engineering Design Specification, 4/23/97 Preliminary/Confidential
Symbios SYM53C885 PCI-SCSI/Fast Ethernet Multifunction Controller Preliminary
Data Manual v3.0
http://cesdis.gsfc.nasa.gov/linux/misc/NWay.html
http://cesdis.gsfc.nasa.gov/linux/misc/100mbps.html
IVc. Errata
See Packet Engines confidential appendix (prototype chips only).
*/
drivers/net: Trim trailing whitespace Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-09-13 11:24:59 -06:00
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
enum capability_flags {
HasMII=1, FullTxStatus=2, IsGigabit=4, HasMulticastBug=8, FullRxStatus=16,
HasMACAddrBug=32, /* Only on early revs. */
DontUseEeprom=64, /* Don't read the MAC from the EEPROm. */
};
[netdrvr] Remove Becker-template 'io_size' member, when invariant Becker-derived drivers often have the 'io_size' member in their chip info struct, indicating the minimum required size of the I/O resource (usually a PCI BAR). For many situations, this number is either constant or irrelevant (due to pci_iomap convenience behavior). This change removes the io_size invariant member, and replaces it with a compile-time constant. Drivers updated: fealnx, gt96100eth, winbond-840, yellowfin Additionally, - gt96100eth: unused 'drv_flags' removed from gt96100eth - winbond-840: unused struct match_info removed - winbond-840: mark pci_id_tbl[] const, __devinitdata Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-06-27 06:54:34 -06:00
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
/* The PCI I/O space extent. */
[netdrvr] Remove Becker-template 'io_size' member, when invariant Becker-derived drivers often have the 'io_size' member in their chip info struct, indicating the minimum required size of the I/O resource (usually a PCI BAR). For many situations, this number is either constant or irrelevant (due to pci_iomap convenience behavior). This change removes the io_size invariant member, and replaces it with a compile-time constant. Drivers updated: fealnx, gt96100eth, winbond-840, yellowfin Additionally, - gt96100eth: unused 'drv_flags' removed from gt96100eth - winbond-840: unused struct match_info removed - winbond-840: mark pci_id_tbl[] const, __devinitdata Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-06-27 06:54:34 -06:00
enum {
YELLOWFIN_SIZE = 0x100,
};
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
struct pci_id_info {
const char *name;
struct match_info {
int pci, pci_mask, subsystem, subsystem_mask;
int revision, revision_mask; /* Only 8 bits. */
} id;
int drv_flags; /* Driver use, intended as capability flags. */
};
Massive net driver const-ification.
2006-03-03 19:33:57 -07:00
static const struct pci_id_info pci_id_tbl[] = {
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
{"Yellowfin G-NIC Gigabit Ethernet", { 0x07021000, 0xffffffff},
FullTxStatus | IsGigabit | HasMulticastBug | HasMACAddrBug | DontUseEeprom},
{"Symbios SYM83C885", { 0x07011000, 0xffffffff},
[netdrvr] Remove Becker-template 'io_size' member, when invariant Becker-derived drivers often have the 'io_size' member in their chip info struct, indicating the minimum required size of the I/O resource (usually a PCI BAR). For many situations, this number is either constant or irrelevant (due to pci_iomap convenience behavior). This change removes the io_size invariant member, and replaces it with a compile-time constant. Drivers updated: fealnx, gt96100eth, winbond-840, yellowfin Additionally, - gt96100eth: unused 'drv_flags' removed from gt96100eth - winbond-840: unused struct match_info removed - winbond-840: mark pci_id_tbl[] const, __devinitdata Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-06-27 06:54:34 -06:00
HasMII | DontUseEeprom },
[netdrvr] Remove long-unused bits from Becker template drivers Symbols such as PCI_USES_IO, PCI_ADDR0, etc. originated from Donald Becker's net driver template, but have been long unused. Remove. In a few drivers, this allows the further eliminate of the pci_flags (or just plain flags) member in the template driver probe structure. Most of this logic is simply open-coded in most drivers, since it never changes. Made a few other cleanups while I was in there, too: * constify, __devinitdata several PCI ID tables * replace table terminating entries such as "{0,}," and "{NULL}," with a more-clean "{ }". Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-06-26 21:47:50 -06:00
{ }
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
};
[netdrvr] Remove long-unused bits from Becker template drivers Symbols such as PCI_USES_IO, PCI_ADDR0, etc. originated from Donald Becker's net driver template, but have been long unused. Remove. In a few drivers, this allows the further eliminate of the pci_flags (or just plain flags) member in the template driver probe structure. Most of this logic is simply open-coded in most drivers, since it never changes. Made a few other cleanups while I was in there, too: * constify, __devinitdata several PCI ID tables * replace table terminating entries such as "{0,}," and "{NULL}," with a more-clean "{ }". Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-06-26 21:47:50 -06:00
static const struct pci_device_id yellowfin_pci_tbl[] = {
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
{ 0x1000, 0x0702, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
{ 0x1000, 0x0701, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1 },
[netdrvr] Remove long-unused bits from Becker template drivers Symbols such as PCI_USES_IO, PCI_ADDR0, etc. originated from Donald Becker's net driver template, but have been long unused. Remove. In a few drivers, this allows the further eliminate of the pci_flags (or just plain flags) member in the template driver probe structure. Most of this logic is simply open-coded in most drivers, since it never changes. Made a few other cleanups while I was in there, too: * constify, __devinitdata several PCI ID tables * replace table terminating entries such as "{0,}," and "{NULL}," with a more-clean "{ }". Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-06-26 21:47:50 -06:00
{ }
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
};
MODULE_DEVICE_TABLE (pci, yellowfin_pci_tbl);
/* Offsets to the Yellowfin registers. Various sizes and alignments. */
enum yellowfin_offsets {
TxCtrl=0x00, TxStatus=0x04, TxPtr=0x0C,
TxIntrSel=0x10, TxBranchSel=0x14, TxWaitSel=0x18,
RxCtrl=0x40, RxStatus=0x44, RxPtr=0x4C,
RxIntrSel=0x50, RxBranchSel=0x54, RxWaitSel=0x58,
EventStatus=0x80, IntrEnb=0x82, IntrClear=0x84, IntrStatus=0x86,
ChipRev=0x8C, DMACtrl=0x90, TxThreshold=0x94,
Cnfg=0xA0, FrameGap0=0xA2, FrameGap1=0xA4,
MII_Cmd=0xA6, MII_Addr=0xA8, MII_Wr_Data=0xAA, MII_Rd_Data=0xAC,
MII_Status=0xAE,
RxDepth=0xB8, FlowCtrl=0xBC,
AddrMode=0xD0, StnAddr=0xD2, HashTbl=0xD8, FIFOcfg=0xF8,
EEStatus=0xF0, EECtrl=0xF1, EEAddr=0xF2, EERead=0xF3, EEWrite=0xF4,
EEFeature=0xF5,
};
/* The Yellowfin Rx and Tx buffer descriptors.
Elements are written as 32 bit for endian portability. */
struct yellowfin_desc {
u32 dbdma_cmd;
u32 addr;
u32 branch_addr;
u32 result_status;
};
struct tx_status_words {
#ifdef __BIG_ENDIAN
u16 tx_errs;
u16 tx_cnt;
u16 paused;
u16 total_tx_cnt;
#else /* Little endian chips. */
u16 tx_cnt;
u16 tx_errs;
u16 total_tx_cnt;
u16 paused;
#endif /* __BIG_ENDIAN */
};
/* Bits in yellowfin_desc.cmd */
enum desc_cmd_bits {
CMD_TX_PKT=0x10000000, CMD_RX_BUF=0x20000000, CMD_TXSTATUS=0x30000000,
CMD_NOP=0x60000000, CMD_STOP=0x70000000,
BRANCH_ALWAYS=0x0C0000, INTR_ALWAYS=0x300000, WAIT_ALWAYS=0x030000,
BRANCH_IFTRUE=0x040000,
};
/* Bits in yellowfin_desc.status */
enum desc_status_bits { RX_EOP=0x0040, };
/* Bits in the interrupt status/mask registers. */
enum intr_status_bits {
IntrRxDone=0x01, IntrRxInvalid=0x02, IntrRxPCIFault=0x04,IntrRxPCIErr=0x08,
IntrTxDone=0x10, IntrTxInvalid=0x20, IntrTxPCIFault=0x40,IntrTxPCIErr=0x80,
IntrEarlyRx=0x100, IntrWakeup=0x200, };
#define PRIV_ALIGN 31 /* Required alignment mask */
#define MII_CNT 4
struct yellowfin_private {
/* Descriptor rings first for alignment.
Tx requires a second descriptor for status. */
struct yellowfin_desc *rx_ring;
struct yellowfin_desc *tx_ring;
struct sk_buff* rx_skbuff[RX_RING_SIZE];
struct sk_buff* tx_skbuff[TX_RING_SIZE];
dma_addr_t rx_ring_dma;
dma_addr_t tx_ring_dma;
struct tx_status_words *tx_status;
dma_addr_t tx_status_dma;
struct timer_list timer; /* Media selection timer. */
struct net_device_stats stats;
/* Frequently used and paired value: keep adjacent for cache effect. */
int chip_id, drv_flags;
struct pci_dev *pci_dev;
unsigned int cur_rx, dirty_rx; /* Producer/consumer ring indices */
unsigned int rx_buf_sz; /* Based on MTU+slack. */
struct tx_status_words *tx_tail_desc;
unsigned int cur_tx, dirty_tx;
int tx_threshold;
unsigned int tx_full:1; /* The Tx queue is full. */
unsigned int full_duplex:1; /* Full-duplex operation requested. */
unsigned int duplex_lock:1;
unsigned int medialock:1; /* Do not sense media. */
unsigned int default_port:4; /* Last dev->if_port value. */
/* MII transceiver section. */
int mii_cnt; /* MII device addresses. */
u16 advertising; /* NWay media advertisement */
unsigned char phys[MII_CNT]; /* MII device addresses, only first one used */
spinlock_t lock;
void __iomem *base;
};
static int read_eeprom(void __iomem *ioaddr, int location);
static int mdio_read(void __iomem *ioaddr, int phy_id, int location);
static void mdio_write(void __iomem *ioaddr, int phy_id, int location, int value);
static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
static int yellowfin_open(struct net_device *dev);
static void yellowfin_timer(unsigned long data);
static void yellowfin_tx_timeout(struct net_device *dev);
static void yellowfin_init_ring(struct net_device *dev);
static int yellowfin_start_xmit(struct sk_buff *skb, struct net_device *dev);
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers Maintain a per-CPU global "struct pt_regs *" variable which can be used instead of passing regs around manually through all ~1800 interrupt handlers in the Linux kernel. The regs pointer is used in few places, but it potentially costs both stack space and code to pass it around. On the FRV arch, removing the regs parameter from all the genirq function results in a 20% speed up of the IRQ exit path (ie: from leaving timer_interrupt() to leaving do_IRQ()). Where appropriate, an arch may override the generic storage facility and do something different with the variable. On FRV, for instance, the address is maintained in GR28 at all times inside the kernel as part of general exception handling. Having looked over the code, it appears that the parameter may be handed down through up to twenty or so layers of functions. Consider a USB character device attached to a USB hub, attached to a USB controller that posts its interrupts through a cascaded auxiliary interrupt controller. A character device driver may want to pass regs to the sysrq handler through the input layer which adds another few layers of parameter passing. I've build this code with allyesconfig for x86_64 and i386. I've runtested the main part of the code on FRV and i386, though I can't test most of the drivers. I've also done partial conversion for powerpc and MIPS - these at least compile with minimal configurations. This will affect all archs. Mostly the changes should be relatively easy. Take do_IRQ(), store the regs pointer at the beginning, saving the old one: struct pt_regs *old_regs = set_irq_regs(regs); And put the old one back at the end: set_irq_regs(old_regs); Don't pass regs through to generic_handle_irq() or __do_IRQ(). In timer_interrupt(), this sort of change will be necessary: - update_process_times(user_mode(regs)); - profile_tick(CPU_PROFILING, regs); + update_process_times(user_mode(get_irq_regs())); + profile_tick(CPU_PROFILING); I'd like to move update_process_times()'s use of get_irq_regs() into itself, except that i386, alone of the archs, uses something other than user_mode(). Some notes on the interrupt handling in the drivers: (*) input_dev() is now gone entirely. The regs pointer is no longer stored in the input_dev struct. (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does something different depending on whether it's been supplied with a regs pointer or not. (*) Various IRQ handler function pointers have been moved to type irq_handler_t. Signed-Off-By: David Howells <dhowells@redhat.com> (cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 07:55:46 -06:00
static irqreturn_t yellowfin_interrupt(int irq, void *dev_instance);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
static int yellowfin_rx(struct net_device *dev);
static void yellowfin_error(struct net_device *dev, int intr_status);
static int yellowfin_close(struct net_device *dev);
static struct net_device_stats *yellowfin_get_stats(struct net_device *dev);
static void set_rx_mode(struct net_device *dev);
drivers/net: const-ify ethtool_ops declarations Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-09-13 12:30:00 -06:00
static const struct ethtool_ops ethtool_ops;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
static int __devinit yellowfin_init_one(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
struct net_device *dev;
struct yellowfin_private *np;
int irq;
int chip_idx = ent->driver_data;
static int find_cnt;
void __iomem *ioaddr;
int i, option = find_cnt < MAX_UNITS ? options[find_cnt] : 0;
int drv_flags = pci_id_tbl[chip_idx].drv_flags;
void *ring_space;
dma_addr_t ring_dma;
#ifdef USE_IO_OPS
int bar = 0;
#else
int bar = 1;
#endif
drivers/net: Trim trailing whitespace Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-09-13 11:24:59 -06:00
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
/* when built into the kernel, we only print version if device is found */
#ifndef MODULE
static int printed_version;
if (!printed_version++)
printk(version);
#endif
i = pci_enable_device(pdev);
if (i) return i;
dev = alloc_etherdev(sizeof(*np));
if (!dev) {
printk (KERN_ERR PFX "cannot allocate ethernet device\n");
return -ENOMEM;
}
SET_MODULE_OWNER(dev);
SET_NETDEV_DEV(dev, &pdev->dev);
np = netdev_priv(dev);
if (pci_request_regions(pdev, DRV_NAME))
goto err_out_free_netdev;
pci_set_master (pdev);
ioaddr = pci_iomap(pdev, bar, YELLOWFIN_SIZE);
if (!ioaddr)
goto err_out_free_res;
irq = pdev->irq;
if (drv_flags & DontUseEeprom)
for (i = 0; i < 6; i++)
dev->dev_addr[i] = ioread8(ioaddr + StnAddr + i);
else {
int ee_offset = (read_eeprom(ioaddr, 6) == 0xff ? 0x100 : 0);
for (i = 0; i < 6; i++)
dev->dev_addr[i] = read_eeprom(ioaddr, ee_offset + i);
}
/* Reset the chip. */
iowrite32(0x80000000, ioaddr + DMACtrl);
dev->base_addr = (unsigned long)ioaddr;
dev->irq = irq;
pci_set_drvdata(pdev, dev);
spin_lock_init(&np->lock);
np->pci_dev = pdev;
np->chip_id = chip_idx;
np->drv_flags = drv_flags;
np->base = ioaddr;
ring_space = pci_alloc_consistent(pdev, TX_TOTAL_SIZE, &ring_dma);
if (!ring_space)
goto err_out_cleardev;
np->tx_ring = (struct yellowfin_desc *)ring_space;
np->tx_ring_dma = ring_dma;
ring_space = pci_alloc_consistent(pdev, RX_TOTAL_SIZE, &ring_dma);
if (!ring_space)
goto err_out_unmap_tx;
np->rx_ring = (struct yellowfin_desc *)ring_space;
np->rx_ring_dma = ring_dma;
ring_space = pci_alloc_consistent(pdev, STATUS_TOTAL_SIZE, &ring_dma);
if (!ring_space)
goto err_out_unmap_rx;
np->tx_status = (struct tx_status_words *)ring_space;
np->tx_status_dma = ring_dma;
if (dev->mem_start)
option = dev->mem_start;
/* The lower four bits are the media type. */
if (option > 0) {
if (option & 0x200)
np->full_duplex = 1;
np->default_port = option & 15;
if (np->default_port)
np->medialock = 1;
}
if (find_cnt < MAX_UNITS && full_duplex[find_cnt] > 0)
np->full_duplex = 1;
if (np->full_duplex)
np->duplex_lock = 1;
/* The Yellowfin-specific entries in the device structure. */
dev->open = &yellowfin_open;
dev->hard_start_xmit = &yellowfin_start_xmit;
dev->stop = &yellowfin_close;
dev->get_stats = &yellowfin_get_stats;
dev->set_multicast_list = &set_rx_mode;
dev->do_ioctl = &netdev_ioctl;
SET_ETHTOOL_OPS(dev, &ethtool_ops);
dev->tx_timeout = yellowfin_tx_timeout;
dev->watchdog_timeo = TX_TIMEOUT;
if (mtu)
dev->mtu = mtu;
i = register_netdev(dev);
if (i)
goto err_out_unmap_status;
printk(KERN_INFO "%s: %s type %8x at %p, ",
dev->name, pci_id_tbl[chip_idx].name,
ioread32(ioaddr + ChipRev), ioaddr);
for (i = 0; i < 5; i++)
printk("%2.2x:", dev->dev_addr[i]);
printk("%2.2x, IRQ %d.\n", dev->dev_addr[i], irq);
if (np->drv_flags & HasMII) {
int phy, phy_idx = 0;
for (phy = 0; phy < 32 && phy_idx < MII_CNT; phy++) {
int mii_status = mdio_read(ioaddr, phy, 1);
if (mii_status != 0xffff && mii_status != 0x0000) {
np->phys[phy_idx++] = phy;
np->advertising = mdio_read(ioaddr, phy, 4);
printk(KERN_INFO "%s: MII PHY found at address %d, status "
"0x%4.4x advertising %4.4x.\n",
dev->name, phy, mii_status, np->advertising);
}
}
np->mii_cnt = phy_idx;
}
find_cnt++;
drivers/net: Trim trailing whitespace Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-09-13 11:24:59 -06:00
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
return 0;
err_out_unmap_status:
drivers/net: Trim trailing whitespace Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-09-13 11:24:59 -06:00
pci_free_consistent(pdev, STATUS_TOTAL_SIZE, np->tx_status,
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
np->tx_status_dma);
err_out_unmap_rx:
pci_free_consistent(pdev, RX_TOTAL_SIZE, np->rx_ring, np->rx_ring_dma);
err_out_unmap_tx:
pci_free_consistent(pdev, TX_TOTAL_SIZE, np->tx_ring, np->tx_ring_dma);
err_out_cleardev:
pci_set_drvdata(pdev, NULL);
pci_iounmap(pdev, ioaddr);
err_out_free_res:
pci_release_regions(pdev);
err_out_free_netdev:
free_netdev (dev);
return -ENODEV;
}
static int __devinit read_eeprom(void __iomem *ioaddr, int location)
{
int bogus_cnt = 10000; /* Typical 33Mhz: 1050 ticks */
iowrite8(location, ioaddr + EEAddr);
iowrite8(0x30 | ((location >> 8) & 7), ioaddr + EECtrl);
while ((ioread8(ioaddr + EEStatus) & 0x80) && --bogus_cnt > 0)
;
return ioread8(ioaddr + EERead);
}
/* MII Managemen Data I/O accesses.
These routines assume the MDIO controller is idle, and do not exit until
the command is finished. */
static int mdio_read(void __iomem *ioaddr, int phy_id, int location)
{
int i;
iowrite16((phy_id<<8) + location, ioaddr + MII_Addr);
iowrite16(1, ioaddr + MII_Cmd);
for (i = 10000; i >= 0; i--)
if ((ioread16(ioaddr + MII_Status) & 1) == 0)
break;
return ioread16(ioaddr + MII_Rd_Data);
}
static void mdio_write(void __iomem *ioaddr, int phy_id, int location, int value)
{
int i;
iowrite16((phy_id<<8) + location, ioaddr + MII_Addr);
iowrite16(value, ioaddr + MII_Wr_Data);
/* Wait for the command to finish. */
for (i = 10000; i >= 0; i--)
if ((ioread16(ioaddr + MII_Status) & 1) == 0)
break;
return;
}
drivers/net: Trim trailing whitespace Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-09-13 11:24:59 -06:00
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
static int yellowfin_open(struct net_device *dev)
{
struct yellowfin_private *yp = netdev_priv(dev);
void __iomem *ioaddr = yp->base;
int i;
/* Reset the chip. */
iowrite32(0x80000000, ioaddr + DMACtrl);
[PATCH] irq-flags: drivers/net: Use the new IRQF_ constants Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: "David S. Miller" <davem@davemloft.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Jeff Garzik <jeff@garzik.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-07-01 20:29:39 -06:00
i = request_irq(dev->irq, &yellowfin_interrupt, IRQF_SHARED, dev->name, dev);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
if (i) return i;
if (yellowfin_debug > 1)
printk(KERN_DEBUG "%s: yellowfin_open() irq %d.\n",
dev->name, dev->irq);
yellowfin_init_ring(dev);
iowrite32(yp->rx_ring_dma, ioaddr + RxPtr);
iowrite32(yp->tx_ring_dma, ioaddr + TxPtr);
for (i = 0; i < 6; i++)
iowrite8(dev->dev_addr[i], ioaddr + StnAddr + i);
/* Set up various condition 'select' registers.
There are no options here. */
iowrite32(0x00800080, ioaddr + TxIntrSel); /* Interrupt on Tx abort */
iowrite32(0x00800080, ioaddr + TxBranchSel); /* Branch on Tx abort */
iowrite32(0x00400040, ioaddr + TxWaitSel); /* Wait on Tx status */
iowrite32(0x00400040, ioaddr + RxIntrSel); /* Interrupt on Rx done */
iowrite32(0x00400040, ioaddr + RxBranchSel); /* Branch on Rx error */
iowrite32(0x00400040, ioaddr + RxWaitSel); /* Wait on Rx done */
/* Initialize other registers: with so many this eventually this will
converted to an offset/value list. */
iowrite32(dma_ctrl, ioaddr + DMACtrl);
iowrite16(fifo_cfg, ioaddr + FIFOcfg);
/* Enable automatic generation of flow control frames, period 0xffff. */
iowrite32(0x0030FFFF, ioaddr + FlowCtrl);
yp->tx_threshold = 32;
iowrite32(yp->tx_threshold, ioaddr + TxThreshold);
if (dev->if_port == 0)
dev->if_port = yp->default_port;
netif_start_queue(dev);
/* Setting the Rx mode will start the Rx process. */
if (yp->drv_flags & IsGigabit) {
/* We are always in full-duplex mode with gigabit! */
yp->full_duplex = 1;
iowrite16(0x01CF, ioaddr + Cnfg);
} else {
iowrite16(0x0018, ioaddr + FrameGap0); /* 0060/4060 for non-MII 10baseT */
iowrite16(0x1018, ioaddr + FrameGap1);
iowrite16(0x101C | (yp->full_duplex ? 2 : 0), ioaddr + Cnfg);
}
set_rx_mode(dev);
/* Enable interrupts by setting the interrupt mask. */
iowrite16(0x81ff, ioaddr + IntrEnb); /* See enum intr_status_bits */
iowrite16(0x0000, ioaddr + EventStatus); /* Clear non-interrupting events */
iowrite32(0x80008000, ioaddr + RxCtrl); /* Start Rx and Tx channels. */
iowrite32(0x80008000, ioaddr + TxCtrl);
if (yellowfin_debug > 2) {
printk(KERN_DEBUG "%s: Done yellowfin_open().\n",
dev->name);
}
/* Set the timer to check for link beat. */
init_timer(&yp->timer);
yp->timer.expires = jiffies + 3*HZ;
yp->timer.data = (unsigned long)dev;
yp->timer.function = &yellowfin_timer; /* timer handler */
add_timer(&yp->timer);
return 0;
}
static void yellowfin_timer(unsigned long data)
{
struct net_device *dev = (struct net_device *)data;
struct yellowfin_private *yp = netdev_priv(dev);
void __iomem *ioaddr = yp->base;
int next_tick = 60*HZ;
if (yellowfin_debug > 3) {
printk(KERN_DEBUG "%s: Yellowfin timer tick, status %8.8x.\n",
dev->name, ioread16(ioaddr + IntrStatus));
}
if (yp->mii_cnt) {
int bmsr = mdio_read(ioaddr, yp->phys[0], MII_BMSR);
int lpa = mdio_read(ioaddr, yp->phys[0], MII_LPA);
int negotiated = lpa & yp->advertising;
if (yellowfin_debug > 1)
printk(KERN_DEBUG "%s: MII #%d status register is %4.4x, "
"link partner capability %4.4x.\n",
dev->name, yp->phys[0], bmsr, lpa);
yp->full_duplex = mii_duplex(yp->duplex_lock, negotiated);
drivers/net: Trim trailing whitespace Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-09-13 11:24:59 -06:00
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
iowrite16(0x101C | (yp->full_duplex ? 2 : 0), ioaddr + Cnfg);
if (bmsr & BMSR_LSTATUS)
next_tick = 60*HZ;
else
next_tick = 3*HZ;
}
yp->timer.expires = jiffies + next_tick;
add_timer(&yp->timer);
}
static void yellowfin_tx_timeout(struct net_device *dev)
{
struct yellowfin_private *yp = netdev_priv(dev);
void __iomem *ioaddr = yp->base;
printk(KERN_WARNING "%s: Yellowfin transmit timed out at %d/%d Tx "
"status %4.4x, Rx status %4.4x, resetting...\n",
dev->name, yp->cur_tx, yp->dirty_tx,
ioread32(ioaddr + TxStatus), ioread32(ioaddr + RxStatus));
/* Note: these should be KERN_DEBUG. */
if (yellowfin_debug) {
int i;
printk(KERN_WARNING " Rx ring %p: ", yp->rx_ring);
for (i = 0; i < RX_RING_SIZE; i++)
printk(" %8.8x", yp->rx_ring[i].result_status);
printk("\n"KERN_WARNING" Tx ring %p: ", yp->tx_ring);
for (i = 0; i < TX_RING_SIZE; i++)
printk(" %4.4x /%8.8x", yp->tx_status[i].tx_errs,
yp->tx_ring[i].result_status);
printk("\n");
}
/* If the hardware is found to hang regularly, we will update the code
to reinitialize the chip here. */
dev->if_port = 0;
/* Wake the potentially-idle transmit channel. */
iowrite32(0x10001000, yp->base + TxCtrl);
if (yp->cur_tx - yp->dirty_tx < TX_QUEUE_SIZE)
netif_wake_queue (dev); /* Typical path */
dev->trans_start = jiffies;
yp->stats.tx_errors++;
}
/* Initialize the Rx and Tx rings, along with various 'dev' bits. */
static void yellowfin_init_ring(struct net_device *dev)
{
struct yellowfin_private *yp = netdev_priv(dev);
int i;
yp->tx_full = 0;
yp->cur_rx = yp->cur_tx = 0;
yp->dirty_tx = 0;
yp->rx_buf_sz = (dev->mtu <= 1500 ? PKT_BUF_SZ : dev->mtu + 32);
for (i = 0; i < RX_RING_SIZE; i++) {
yp->rx_ring[i].dbdma_cmd =
cpu_to_le32(CMD_RX_BUF | INTR_ALWAYS | yp->rx_buf_sz);
yp->rx_ring[i].branch_addr = cpu_to_le32(yp->rx_ring_dma +
((i+1)%RX_RING_SIZE)*sizeof(struct yellowfin_desc));
}
for (i = 0; i < RX_RING_SIZE; i++) {
struct sk_buff *skb = dev_alloc_skb(yp->rx_buf_sz);
yp->rx_skbuff[i] = skb;
if (skb == NULL)
break;
skb->dev = dev; /* Mark as being used by this device. */
skb_reserve(skb, 2); /* 16 byte align the IP header. */
yp->rx_ring[i].addr = cpu_to_le32(pci_map_single(yp->pci_dev,
[NET]: Remove gratuitous use of skb->tail in network drivers. Many drivers use skb->tail unnecessarily. In these situations, the code roughly looks like: dev = dev_alloc_skb(...); [optional] skb_reserve(skb, ...); ... skb->tail ... But even if the skb_reserve() happens, skb->data equals skb->tail. So it doesn't make any sense to use anything other than skb->data in these cases. Another case was the s2io.c driver directly mucking with the skb->data and skb->tail pointers. It really just wanted to do an skb_reserve(), so that's what the code was changed to do instead. Another reason I'm making this change as it allows some SKB cleanups I have planned simpler to merge. In those cleanups, skb->head, skb->tail, and skb->end pointers are removed, and replaced with skb->head_room and skb->tail_room integers. Signed-off-by: David S. Miller <davem@davemloft.net> Acked-by: Jeff Garzik <jgarzik@pobox.com>
2005-06-28 16:25:31 -06:00
skb->data, yp->rx_buf_sz, PCI_DMA_FROMDEVICE));
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
}
yp->rx_ring[i-1].dbdma_cmd = cpu_to_le32(CMD_STOP);
yp->dirty_rx = (unsigned int)(i - RX_RING_SIZE);
#define NO_TXSTATS
#ifdef NO_TXSTATS
/* In this mode the Tx ring needs only a single descriptor. */
for (i = 0; i < TX_RING_SIZE; i++) {
yp->tx_skbuff[i] = NULL;
yp->tx_ring[i].dbdma_cmd = cpu_to_le32(CMD_STOP);
yp->tx_ring[i].branch_addr = cpu_to_le32(yp->tx_ring_dma +
((i+1)%TX_RING_SIZE)*sizeof(struct yellowfin_desc));
}
/* Wrap ring */
yp->tx_ring[--i].dbdma_cmd = cpu_to_le32(CMD_STOP | BRANCH_ALWAYS);
#else
{
int j;
/* Tx ring needs a pair of descriptors, the second for the status. */
for (i = 0; i < TX_RING_SIZE; i++) {
j = 2*i;
yp->tx_skbuff[i] = 0;
/* Branch on Tx error. */
yp->tx_ring[j].dbdma_cmd = cpu_to_le32(CMD_STOP);
yp->tx_ring[j].branch_addr = cpu_to_le32(yp->tx_ring_dma +
(j+1)*sizeof(struct yellowfin_desc);
j++;
if (yp->flags & FullTxStatus) {
yp->tx_ring[j].dbdma_cmd =
cpu_to_le32(CMD_TXSTATUS | sizeof(*yp->tx_status));
yp->tx_ring[j].request_cnt = sizeof(*yp->tx_status);
yp->tx_ring[j].addr = cpu_to_le32(yp->tx_status_dma +
i*sizeof(struct tx_status_words);
} else {
/* Symbios chips write only tx_errs word. */
yp->tx_ring[j].dbdma_cmd =
cpu_to_le32(CMD_TXSTATUS | INTR_ALWAYS | 2);
yp->tx_ring[j].request_cnt = 2;
/* Om pade ummmmm... */
yp->tx_ring[j].addr = cpu_to_le32(yp->tx_status_dma +
i*sizeof(struct tx_status_words) +
drivers/net: Trim trailing whitespace Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-09-13 11:24:59 -06:00
&(yp->tx_status[0].tx_errs) -
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
&(yp->tx_status[0]));
}
drivers/net: Trim trailing whitespace Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-09-13 11:24:59 -06:00
yp->tx_ring[j].branch_addr = cpu_to_le32(yp->tx_ring_dma +
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
((j+1)%(2*TX_RING_SIZE))*sizeof(struct yellowfin_desc));
}
/* Wrap ring */
yp->tx_ring[++j].dbdma_cmd |= cpu_to_le32(BRANCH_ALWAYS | INTR_ALWAYS);
}
#endif
yp->tx_tail_desc = &yp->tx_status[0];
return;
}
static int yellowfin_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct yellowfin_private *yp = netdev_priv(dev);
unsigned entry;
int len = skb->len;
netif_stop_queue (dev);
/* Note: Ordering is important here, set the field with the
"ownership" bit last, and only then increment cur_tx. */
/* Calculate the next Tx descriptor entry. */
entry = yp->cur_tx % TX_RING_SIZE;
if (gx_fix) { /* Note: only works for paddable protocols e.g. IP. */
int cacheline_end = ((unsigned long)skb->data + skb->len) % 32;
/* Fix GX chipset errata. */
if (cacheline_end > 24 || cacheline_end == 0) {
len = skb->len + 32 - cacheline_end + 1;
[NET]: Avoid allocating skb in skb_pad First of all it is unnecessary to allocate a new skb in skb_pad since the existing one is not shared. More importantly, our hard_start_xmit interface does not allow a new skb to be allocated since that breaks requeueing. This patch uses pskb_expand_head to expand the existing skb and linearize it if needed. Actually, someone should sift through every instance of skb_pad on a non-linear skb as they do not fit the reasons why this was originally created. Incidentally, this fixes a minor bug when the skb is cloned (tcpdump, TCP, etc.). As it is skb_pad will simply write over a cloned skb. Because of the position of the write it is unlikely to cause problems but still it's best if we don't do it. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2006-06-23 03:06:41 -06:00
if (skb_padto(skb, len)) {
yp->tx_skbuff[entry] = NULL;
netif_wake_queue(dev);
return 0;
}
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
}
}
yp->tx_skbuff[entry] = skb;
#ifdef NO_TXSTATS
drivers/net: Trim trailing whitespace Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-09-13 11:24:59 -06:00
yp->tx_ring[entry].addr = cpu_to_le32(pci_map_single(yp->pci_dev,
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
skb->data, len, PCI_DMA_TODEVICE));
yp->tx_ring[entry].result_status = 0;
if (entry >= TX_RING_SIZE-1) {
/* New stop command. */
yp->tx_ring[0].dbdma_cmd = cpu_to_le32(CMD_STOP);
yp->tx_ring[TX_RING_SIZE-1].dbdma_cmd =
cpu_to_le32(CMD_TX_PKT|BRANCH_ALWAYS | len);
} else {
yp->tx_ring[entry+1].dbdma_cmd = cpu_to_le32(CMD_STOP);
yp->tx_ring[entry].dbdma_cmd =
cpu_to_le32(CMD_TX_PKT | BRANCH_IFTRUE | len);
}
yp->cur_tx++;
#else
yp->tx_ring[entry<<1].request_cnt = len;
drivers/net: Trim trailing whitespace Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-09-13 11:24:59 -06:00
yp->tx_ring[entry<<1].addr = cpu_to_le32(pci_map_single(yp->pci_dev,
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
skb->data, len, PCI_DMA_TODEVICE));
drivers/net: Trim trailing whitespace Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-09-13 11:24:59 -06:00
/* The input_last (status-write) command is constant, but we must
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
rewrite the subsequent 'stop' command. */
yp->cur_tx++;
{
unsigned next_entry = yp->cur_tx % TX_RING_SIZE;
yp->tx_ring[next_entry<<1].dbdma_cmd = cpu_to_le32(CMD_STOP);
}
/* Final step -- overwrite the old 'stop' command. */
yp->tx_ring[entry<<1].dbdma_cmd =
cpu_to_le32( ((entry % 6) == 0 ? CMD_TX_PKT|INTR_ALWAYS|BRANCH_IFTRUE :
CMD_TX_PKT | BRANCH_IFTRUE) | len);
#endif
/* Non-x86 Todo: explicitly flush cache lines here. */
/* Wake the potentially-idle transmit channel. */
iowrite32(0x10001000, yp->base + TxCtrl);
if (yp->cur_tx - yp->dirty_tx < TX_QUEUE_SIZE)
netif_start_queue (dev); /* Typical path */
else
yp->tx_full = 1;
dev->trans_start = jiffies;
if (yellowfin_debug > 4) {
printk(KERN_DEBUG "%s: Yellowfin transmit frame #%d queued in slot %d.\n",
dev->name, yp->cur_tx, entry);
}
return 0;
}
/* The interrupt handler does all of the Rx thread work and cleans up
after the Tx thread. */
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers Maintain a per-CPU global "struct pt_regs *" variable which can be used instead of passing regs around manually through all ~1800 interrupt handlers in the Linux kernel. The regs pointer is used in few places, but it potentially costs both stack space and code to pass it around. On the FRV arch, removing the regs parameter from all the genirq function results in a 20% speed up of the IRQ exit path (ie: from leaving timer_interrupt() to leaving do_IRQ()). Where appropriate, an arch may override the generic storage facility and do something different with the variable. On FRV, for instance, the address is maintained in GR28 at all times inside the kernel as part of general exception handling. Having looked over the code, it appears that the parameter may be handed down through up to twenty or so layers of functions. Consider a USB character device attached to a USB hub, attached to a USB controller that posts its interrupts through a cascaded auxiliary interrupt controller. A character device driver may want to pass regs to the sysrq handler through the input layer which adds another few layers of parameter passing. I've build this code with allyesconfig for x86_64 and i386. I've runtested the main part of the code on FRV and i386, though I can't test most of the drivers. I've also done partial conversion for powerpc and MIPS - these at least compile with minimal configurations. This will affect all archs. Mostly the changes should be relatively easy. Take do_IRQ(), store the regs pointer at the beginning, saving the old one: struct pt_regs *old_regs = set_irq_regs(regs); And put the old one back at the end: set_irq_regs(old_regs); Don't pass regs through to generic_handle_irq() or __do_IRQ(). In timer_interrupt(), this sort of change will be necessary: - update_process_times(user_mode(regs)); - profile_tick(CPU_PROFILING, regs); + update_process_times(user_mode(get_irq_regs())); + profile_tick(CPU_PROFILING); I'd like to move update_process_times()'s use of get_irq_regs() into itself, except that i386, alone of the archs, uses something other than user_mode(). Some notes on the interrupt handling in the drivers: (*) input_dev() is now gone entirely. The regs pointer is no longer stored in the input_dev struct. (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does something different depending on whether it's been supplied with a regs pointer or not. (*) Various IRQ handler function pointers have been moved to type irq_handler_t. Signed-Off-By: David Howells <dhowells@redhat.com> (cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 07:55:46 -06:00
static irqreturn_t yellowfin_interrupt(int irq, void *dev_instance)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
{
struct net_device *dev = dev_instance;
struct yellowfin_private *yp;
void __iomem *ioaddr;
int boguscnt = max_interrupt_work;
unsigned int handled = 0;
yp = netdev_priv(dev);
ioaddr = yp->base;
drivers/net: Trim trailing whitespace Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-09-13 11:24:59 -06:00
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
spin_lock (&yp->lock);
do {
u16 intr_status = ioread16(ioaddr + IntrClear);
if (yellowfin_debug > 4)
printk(KERN_DEBUG "%s: Yellowfin interrupt, status %4.4x.\n",
dev->name, intr_status);
if (intr_status == 0)
break;
handled = 1;
if (intr_status & (IntrRxDone | IntrEarlyRx)) {
yellowfin_rx(dev);
iowrite32(0x10001000, ioaddr + RxCtrl); /* Wake Rx engine. */
}
#ifdef NO_TXSTATS
for (; yp->cur_tx - yp->dirty_tx > 0; yp->dirty_tx++) {
int entry = yp->dirty_tx % TX_RING_SIZE;
struct sk_buff *skb;
if (yp->tx_ring[entry].result_status == 0)
break;
skb = yp->tx_skbuff[entry];
yp->stats.tx_packets++;
yp->stats.tx_bytes += skb->len;
/* Free the original skb. */
pci_unmap_single(yp->pci_dev, yp->tx_ring[entry].addr,
skb->len, PCI_DMA_TODEVICE);
dev_kfree_skb_irq(skb);
yp->tx_skbuff[entry] = NULL;
}
if (yp->tx_full
&& yp->cur_tx - yp->dirty_tx < TX_QUEUE_SIZE - 4) {
/* The ring is no longer full, clear tbusy. */
yp->tx_full = 0;
netif_wake_queue(dev);
}
#else
if ((intr_status & IntrTxDone) || (yp->tx_tail_desc->tx_errs)) {
unsigned dirty_tx = yp->dirty_tx;
for (dirty_tx = yp->dirty_tx; yp->cur_tx - dirty_tx > 0;
dirty_tx++) {
/* Todo: optimize this. */
int entry = dirty_tx % TX_RING_SIZE;
u16 tx_errs = yp->tx_status[entry].tx_errs;
struct sk_buff *skb;
#ifndef final_version
if (yellowfin_debug > 5)
printk(KERN_DEBUG "%s: Tx queue %d check, Tx status "
"%4.4x %4.4x %4.4x %4.4x.\n",
dev->name, entry,
yp->tx_status[entry].tx_cnt,
yp->tx_status[entry].tx_errs,
yp->tx_status[entry].total_tx_cnt,
yp->tx_status[entry].paused);
#endif
if (tx_errs == 0)
break; /* It still hasn't been Txed */
skb = yp->tx_skbuff[entry];
if (tx_errs & 0xF810) {
/* There was an major error, log it. */
#ifndef final_version
if (yellowfin_debug > 1)
printk(KERN_DEBUG "%s: Transmit error, Tx status %4.4x.\n",
dev->name, tx_errs);
#endif
yp->stats.tx_errors++;
if (tx_errs & 0xF800) yp->stats.tx_aborted_errors++;
if (tx_errs & 0x0800) yp->stats.tx_carrier_errors++;
if (tx_errs & 0x2000) yp->stats.tx_window_errors++;
if (tx_errs & 0x8000) yp->stats.tx_fifo_errors++;
} else {
#ifndef final_version
if (yellowfin_debug > 4)
printk(KERN_DEBUG "%s: Normal transmit, Tx status %4.4x.\n",
dev->name, tx_errs);
#endif
yp->stats.tx_bytes += skb->len;
yp->stats.collisions += tx_errs & 15;
yp->stats.tx_packets++;
}
/* Free the original skb. */
drivers/net: Trim trailing whitespace Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-09-13 11:24:59 -06:00
pci_unmap_single(yp->pci_dev,
yp->tx_ring[entry<<1].addr, skb->len,
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
PCI_DMA_TODEVICE);
dev_kfree_skb_irq(skb);
yp->tx_skbuff[entry] = 0;
/* Mark status as empty. */
yp->tx_status[entry].tx_errs = 0;
}
#ifndef final_version
if (yp->cur_tx - dirty_tx > TX_RING_SIZE) {
printk(KERN_ERR "%s: Out-of-sync dirty pointer, %d vs. %d, full=%d.\n",
dev->name, dirty_tx, yp->cur_tx, yp->tx_full);
dirty_tx += TX_RING_SIZE;
}
#endif
if (yp->tx_full
&& yp->cur_tx - dirty_tx < TX_QUEUE_SIZE - 2) {
/* The ring is no longer full, clear tbusy. */
yp->tx_full = 0;
netif_wake_queue(dev);
}
yp->dirty_tx = dirty_tx;
yp->tx_tail_desc = &yp->tx_status[dirty_tx % TX_RING_SIZE];
}
#endif
/* Log errors and other uncommon events. */
if (intr_status & 0x2ee) /* Abnormal error summary. */
yellowfin_error(dev, intr_status);
if (--boguscnt < 0) {
printk(KERN_WARNING "%s: Too much work at interrupt, "
"status=0x%4.4x.\n",
dev->name, intr_status);
break;
}
} while (1);
if (yellowfin_debug > 3)
printk(KERN_DEBUG "%s: exiting interrupt, status=%#4.4x.\n",
dev->name, ioread16(ioaddr + IntrStatus));
spin_unlock (&yp->lock);
return IRQ_RETVAL(handled);
}
/* This routine is logically part of the interrupt handler, but separated
for clarity and better register allocation. */
static int yellowfin_rx(struct net_device *dev)
{
struct yellowfin_private *yp = netdev_priv(dev);
int entry = yp->cur_rx % RX_RING_SIZE;
int boguscnt = yp->dirty_rx + RX_RING_SIZE - yp->cur_rx;
if (yellowfin_debug > 4) {
printk(KERN_DEBUG " In yellowfin_rx(), entry %d status %8.8x.\n",
entry, yp->rx_ring[entry].result_status);
printk(KERN_DEBUG " #%d desc. %8.8x %8.8x %8.8x.\n",
entry, yp->rx_ring[entry].dbdma_cmd, yp->rx_ring[entry].addr,
yp->rx_ring[entry].result_status);
}
/* If EOP is set on the next entry, it's a new packet. Send it up. */
while (1) {
struct yellowfin_desc *desc = &yp->rx_ring[entry];
struct sk_buff *rx_skb = yp->rx_skbuff[entry];
s16 frame_status;
u16 desc_status;
int data_size;
u8 *buf_addr;
if(!desc->result_status)
break;
pci_dma_sync_single_for_cpu(yp->pci_dev, desc->addr,
yp->rx_buf_sz, PCI_DMA_FROMDEVICE);
desc_status = le32_to_cpu(desc->result_status) >> 16;
[NET]: Remove gratuitous use of skb->tail in network drivers. Many drivers use skb->tail unnecessarily. In these situations, the code roughly looks like: dev = dev_alloc_skb(...); [optional] skb_reserve(skb, ...); ... skb->tail ... But even if the skb_reserve() happens, skb->data equals skb->tail. So it doesn't make any sense to use anything other than skb->data in these cases. Another case was the s2io.c driver directly mucking with the skb->data and skb->tail pointers. It really just wanted to do an skb_reserve(), so that's what the code was changed to do instead. Another reason I'm making this change as it allows some SKB cleanups I have planned simpler to merge. In those cleanups, skb->head, skb->tail, and skb->end pointers are removed, and replaced with skb->head_room and skb->tail_room integers. Signed-off-by: David S. Miller <davem@davemloft.net> Acked-by: Jeff Garzik <jgarzik@pobox.com>
2005-06-28 16:25:31 -06:00
buf_addr = rx_skb->data;
drivers/net: Trim trailing whitespace Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-09-13 11:24:59 -06:00
data_size = (le32_to_cpu(desc->dbdma_cmd) -
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
le32_to_cpu(desc->result_status)) & 0xffff;
frame_status = le16_to_cpu(get_unaligned((s16*)&(buf_addr[data_size - 2])));
if (yellowfin_debug > 4)
printk(KERN_DEBUG " yellowfin_rx() status was %4.4x.\n",
frame_status);
if (--boguscnt < 0)
break;
if ( ! (desc_status & RX_EOP)) {
if (data_size != 0)
printk(KERN_WARNING "%s: Oversized Ethernet frame spanned multiple buffers,"
" status %4.4x, data_size %d!\n", dev->name, desc_status, data_size);
yp->stats.rx_length_errors++;
} else if ((yp->drv_flags & IsGigabit) && (frame_status & 0x0038)) {
/* There was a error. */
if (yellowfin_debug > 3)
printk(KERN_DEBUG " yellowfin_rx() Rx error was %4.4x.\n",
frame_status);
yp->stats.rx_errors++;
if (frame_status & 0x0060) yp->stats.rx_length_errors++;
if (frame_status & 0x0008) yp->stats.rx_frame_errors++;
if (frame_status & 0x0010) yp->stats.rx_crc_errors++;
if (frame_status < 0) yp->stats.rx_dropped++;
} else if ( !(yp->drv_flags & IsGigabit) &&
((buf_addr[data_size-1] & 0x85) || buf_addr[data_size-2] & 0xC0)) {
u8 status1 = buf_addr[data_size-2];
u8 status2 = buf_addr[data_size-1];
yp->stats.rx_errors++;
if (status1 & 0xC0) yp->stats.rx_length_errors++;
if (status2 & 0x03) yp->stats.rx_frame_errors++;
if (status2 & 0x04) yp->stats.rx_crc_errors++;
if (status2 & 0x80) yp->stats.rx_dropped++;
#ifdef YF_PROTOTYPE /* Support for prototype hardware errata. */
} else if ((yp->flags & HasMACAddrBug) &&
memcmp(le32_to_cpu(yp->rx_ring_dma +
entry*sizeof(struct yellowfin_desc)),
drivers/net: Trim trailing whitespace Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-09-13 11:24:59 -06:00
dev->dev_addr, 6) != 0 &&
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
memcmp(le32_to_cpu(yp->rx_ring_dma +
entry*sizeof(struct yellowfin_desc)),
"\377\377\377\377\377\377", 6) != 0) {
if (bogus_rx++ == 0)
printk(KERN_WARNING "%s: Bad frame to %2.2x:%2.2x:%2.2x:%2.2x:"
"%2.2x:%2.2x.\n",
dev->name, buf_addr[0], buf_addr[1], buf_addr[2],
buf_addr[3], buf_addr[4], buf_addr[5]);
#endif
} else {
struct sk_buff *skb;
int pkt_len = data_size -
(yp->chip_id ? 7 : 8 + buf_addr[data_size - 8]);
/* To verify: Yellowfin Length should omit the CRC! */
#ifndef final_version
if (yellowfin_debug > 4)
printk(KERN_DEBUG " yellowfin_rx() normal Rx pkt length %d"
" of %d, bogus_cnt %d.\n",
pkt_len, data_size, boguscnt);
#endif
/* Check if the packet is long enough to just pass up the skbuff
without copying to a properly sized skbuff. */
if (pkt_len > rx_copybreak) {
skb_put(skb = rx_skb, pkt_len);
drivers/net: Trim trailing whitespace Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-09-13 11:24:59 -06:00
pci_unmap_single(yp->pci_dev,
yp->rx_ring[entry].addr,
yp->rx_buf_sz,
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
PCI_DMA_FROMDEVICE);
yp->rx_skbuff[entry] = NULL;
} else {
skb = dev_alloc_skb(pkt_len + 2);
if (skb == NULL)
break;
skb_reserve(skb, 2); /* 16 byte align the IP header */
[NET]: Remove gratuitous use of skb->tail in network drivers. Many drivers use skb->tail unnecessarily. In these situations, the code roughly looks like: dev = dev_alloc_skb(...); [optional] skb_reserve(skb, ...); ... skb->tail ... But even if the skb_reserve() happens, skb->data equals skb->tail. So it doesn't make any sense to use anything other than skb->data in these cases. Another case was the s2io.c driver directly mucking with the skb->data and skb->tail pointers. It really just wanted to do an skb_reserve(), so that's what the code was changed to do instead. Another reason I'm making this change as it allows some SKB cleanups I have planned simpler to merge. In those cleanups, skb->head, skb->tail, and skb->end pointers are removed, and replaced with skb->head_room and skb->tail_room integers. Signed-off-by: David S. Miller <davem@davemloft.net> Acked-by: Jeff Garzik <jgarzik@pobox.com>
2005-06-28 16:25:31 -06:00
eth_copy_and_sum(skb, rx_skb->data, pkt_len, 0);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
skb_put(skb, pkt_len);
pci_dma_sync_single_for_device(yp->pci_dev, desc->addr,
yp->rx_buf_sz,
PCI_DMA_FROMDEVICE);
}
skb->protocol = eth_type_trans(skb, dev);
netif_rx(skb);
dev->last_rx = jiffies;
yp->stats.rx_packets++;
yp->stats.rx_bytes += pkt_len;
}
entry = (++yp->cur_rx) % RX_RING_SIZE;
}
/* Refill the Rx ring buffers. */
for (; yp->cur_rx - yp->dirty_rx > 0; yp->dirty_rx++) {
entry = yp->dirty_rx % RX_RING_SIZE;
if (yp->rx_skbuff[entry] == NULL) {
struct sk_buff *skb = dev_alloc_skb(yp->rx_buf_sz);
if (skb == NULL)
break; /* Better luck next round. */
yp->rx_skbuff[entry] = skb;
skb->dev = dev; /* Mark as being used by this device. */
skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
yp->rx_ring[entry].addr = cpu_to_le32(pci_map_single(yp->pci_dev,
[NET]: Remove gratuitous use of skb->tail in network drivers. Many drivers use skb->tail unnecessarily. In these situations, the code roughly looks like: dev = dev_alloc_skb(...); [optional] skb_reserve(skb, ...); ... skb->tail ... But even if the skb_reserve() happens, skb->data equals skb->tail. So it doesn't make any sense to use anything other than skb->data in these cases. Another case was the s2io.c driver directly mucking with the skb->data and skb->tail pointers. It really just wanted to do an skb_reserve(), so that's what the code was changed to do instead. Another reason I'm making this change as it allows some SKB cleanups I have planned simpler to merge. In those cleanups, skb->head, skb->tail, and skb->end pointers are removed, and replaced with skb->head_room and skb->tail_room integers. Signed-off-by: David S. Miller <davem@davemloft.net> Acked-by: Jeff Garzik <jgarzik@pobox.com>
2005-06-28 16:25:31 -06:00
skb->data, yp->rx_buf_sz, PCI_DMA_FROMDEVICE));
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
}
yp->rx_ring[entry].dbdma_cmd = cpu_to_le32(CMD_STOP);
yp->rx_ring[entry].result_status = 0; /* Clear complete bit. */
if (entry != 0)
yp->rx_ring[entry - 1].dbdma_cmd =
cpu_to_le32(CMD_RX_BUF | INTR_ALWAYS | yp->rx_buf_sz);
else
yp->rx_ring[RX_RING_SIZE - 1].dbdma_cmd =
cpu_to_le32(CMD_RX_BUF | INTR_ALWAYS | BRANCH_ALWAYS
| yp->rx_buf_sz);
}
return 0;
}
static void yellowfin_error(struct net_device *dev, int intr_status)
{
struct yellowfin_private *yp = netdev_priv(dev);
printk(KERN_ERR "%s: Something Wicked happened! %4.4x.\n",
dev->name, intr_status);
/* Hmmmmm, it's not clear what to do here. */
if (intr_status & (IntrTxPCIErr | IntrTxPCIFault))
yp->stats.tx_errors++;
if (intr_status & (IntrRxPCIErr | IntrRxPCIFault))
yp->stats.rx_errors++;
}
static int yellowfin_close(struct net_device *dev)
{
struct yellowfin_private *yp = netdev_priv(dev);
void __iomem *ioaddr = yp->base;
int i;
netif_stop_queue (dev);
if (yellowfin_debug > 1) {
printk(KERN_DEBUG "%s: Shutting down ethercard, status was Tx %4.4x "
"Rx %4.4x Int %2.2x.\n",
dev->name, ioread16(ioaddr + TxStatus),
ioread16(ioaddr + RxStatus),
ioread16(ioaddr + IntrStatus));
printk(KERN_DEBUG "%s: Queue pointers were Tx %d / %d, Rx %d / %d.\n",
dev->name, yp->cur_tx, yp->dirty_tx, yp->cur_rx, yp->dirty_rx);
}
/* Disable interrupts by clearing the interrupt mask. */
iowrite16(0x0000, ioaddr + IntrEnb);
/* Stop the chip's Tx and Rx processes. */
iowrite32(0x80000000, ioaddr + RxCtrl);
iowrite32(0x80000000, ioaddr + TxCtrl);
del_timer(&yp->timer);
#if defined(__i386__)
if (yellowfin_debug > 2) {
printk("\n"KERN_DEBUG" Tx ring at %8.8llx:\n",
(unsigned long long)yp->tx_ring_dma);
for (i = 0; i < TX_RING_SIZE*2; i++)
printk(" %c #%d desc. %8.8x %8.8x %8.8x %8.8x.\n",
ioread32(ioaddr + TxPtr) == (long)&yp->tx_ring[i] ? '>' : ' ',
i, yp->tx_ring[i].dbdma_cmd, yp->tx_ring[i].addr,
yp->tx_ring[i].branch_addr, yp->tx_ring[i].result_status);
printk(KERN_DEBUG " Tx status %p:\n", yp->tx_status);
for (i = 0; i < TX_RING_SIZE; i++)
printk(" #%d status %4.4x %4.4x %4.4x %4.4x.\n",
i, yp->tx_status[i].tx_cnt, yp->tx_status[i].tx_errs,
yp->tx_status[i].total_tx_cnt, yp->tx_status[i].paused);
printk("\n"KERN_DEBUG " Rx ring %8.8llx:\n",
(unsigned long long)yp->rx_ring_dma);
for (i = 0; i < RX_RING_SIZE; i++) {
printk(KERN_DEBUG " %c #%d desc. %8.8x %8.8x %8.8x\n",
ioread32(ioaddr + RxPtr) == (long)&yp->rx_ring[i] ? '>' : ' ',
i, yp->rx_ring[i].dbdma_cmd, yp->rx_ring[i].addr,
yp->rx_ring[i].result_status);
if (yellowfin_debug > 6) {
if (get_unaligned((u8*)yp->rx_ring[i].addr) != 0x69) {
int j;
for (j = 0; j < 0x50; j++)
printk(" %4.4x",
get_unaligned(((u16*)yp->rx_ring[i].addr) + j));
printk("\n");
}
}
}
}
#endif /* __i386__ debugging only */
free_irq(dev->irq, dev);
/* Free all the skbuffs in the Rx queue. */
for (i = 0; i < RX_RING_SIZE; i++) {
yp->rx_ring[i].dbdma_cmd = cpu_to_le32(CMD_STOP);
yp->rx_ring[i].addr = 0xBADF00D0; /* An invalid address. */
if (yp->rx_skbuff[i]) {
dev_kfree_skb(yp->rx_skbuff[i]);
}
yp->rx_skbuff[i] = NULL;
}
for (i = 0; i < TX_RING_SIZE; i++) {
if (yp->tx_skbuff[i])
dev_kfree_skb(yp->tx_skbuff[i]);
yp->tx_skbuff[i] = NULL;
}
#ifdef YF_PROTOTYPE /* Support for prototype hardware errata. */
if (yellowfin_debug > 0) {
printk(KERN_DEBUG "%s: Received %d frames that we should not have.\n",
dev->name, bogus_rx);
}
#endif
return 0;
}
static struct net_device_stats *yellowfin_get_stats(struct net_device *dev)
{
struct yellowfin_private *yp = netdev_priv(dev);
return &yp->stats;
}
/* Set or clear the multicast filter for this adaptor. */
static void set_rx_mode(struct net_device *dev)
{
struct yellowfin_private *yp = netdev_priv(dev);
void __iomem *ioaddr = yp->base;
u16 cfg_value = ioread16(ioaddr + Cnfg);
/* Stop the Rx process to change any value. */
iowrite16(cfg_value & ~0x1000, ioaddr + Cnfg);
if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */
iowrite16(0x000F, ioaddr + AddrMode);
} else if ((dev->mc_count > 64) || (dev->flags & IFF_ALLMULTI)) {
/* Too many to filter well, or accept all multicasts. */
iowrite16(0x000B, ioaddr + AddrMode);
} else if (dev->mc_count > 0) { /* Must use the multicast hash table. */
struct dev_mc_list *mclist;
u16 hash_table[4];
int i;
memset(hash_table, 0, sizeof(hash_table));
for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count;
i++, mclist = mclist->next) {
unsigned int bit;
/* Due to a bug in the early chip versions, multiple filter
slots must be set for each address. */
if (yp->drv_flags & HasMulticastBug) {
bit = (ether_crc_le(3, mclist->dmi_addr) >> 3) & 0x3f;
hash_table[bit >> 4] |= (1 << bit);
bit = (ether_crc_le(4, mclist->dmi_addr) >> 3) & 0x3f;
hash_table[bit >> 4] |= (1 << bit);
bit = (ether_crc_le(5, mclist->dmi_addr) >> 3) & 0x3f;
hash_table[bit >> 4] |= (1 << bit);
}
bit = (ether_crc_le(6, mclist->dmi_addr) >> 3) & 0x3f;
hash_table[bit >> 4] |= (1 << bit);
}
/* Copy the hash table to the chip. */
for (i = 0; i < 4; i++)
iowrite16(hash_table[i], ioaddr + HashTbl + i*2);
iowrite16(0x0003, ioaddr + AddrMode);
} else { /* Normal, unicast/broadcast-only mode. */
iowrite16(0x0001, ioaddr + AddrMode);
}
/* Restart the Rx process. */
iowrite16(cfg_value | 0x1000, ioaddr + Cnfg);
}
static void yellowfin_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
{
struct yellowfin_private *np = netdev_priv(dev);
strcpy(info->driver, DRV_NAME);
strcpy(info->version, DRV_VERSION);
strcpy(info->bus_info, pci_name(np->pci_dev));
}
drivers/net: const-ify ethtool_ops declarations Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-09-13 12:30:00 -06:00
static const struct ethtool_ops ethtool_ops = {
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
.get_drvinfo = yellowfin_get_drvinfo
};
static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
{
struct yellowfin_private *np = netdev_priv(dev);
void __iomem *ioaddr = np->base;
struct mii_ioctl_data *data = if_mii(rq);
switch(cmd) {
case SIOCGMIIPHY: /* Get address of MII PHY in use. */
data->phy_id = np->phys[0] & 0x1f;
/* Fall Through */
case SIOCGMIIREG: /* Read MII PHY register. */
data->val_out = mdio_read(ioaddr, data->phy_id & 0x1f, data->reg_num & 0x1f);
return 0;
case SIOCSMIIREG: /* Write MII PHY register. */
if (!capable(CAP_NET_ADMIN))
return -EPERM;
if (data->phy_id == np->phys[0]) {
u16 value = data->val_in;
switch (data->reg_num) {
case 0:
/* Check for autonegotiation on or reset. */
np->medialock = (value & 0x9000) ? 0 : 1;
if (np->medialock)
np->full_duplex = (value & 0x0100) ? 1 : 0;
break;
case 4: np->advertising = value; break;
}
/* Perhaps check_duplex(dev), depending on chip semantics. */
}
mdio_write(ioaddr, data->phy_id & 0x1f, data->reg_num & 0x1f, data->val_in);
return 0;
default:
return -EOPNOTSUPP;
}
}
static void __devexit yellowfin_remove_one (struct pci_dev *pdev)
{
struct net_device *dev = pci_get_drvdata(pdev);
struct yellowfin_private *np;
BUG_ON() Conversion in drivers/net/ this changes if() BUG(); constructs to BUG_ON() which is cleaner, contains unlikely() and can better optimized away. Signed-off-by: Eric Sesterhenn <snakebyte@gmx.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
2006-04-02 05:52:48 -06:00
BUG_ON(!dev);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
np = netdev_priv(dev);
drivers/net: Trim trailing whitespace Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-09-13 11:24:59 -06:00
pci_free_consistent(pdev, STATUS_TOTAL_SIZE, np->tx_status,
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
np->tx_status_dma);
pci_free_consistent(pdev, RX_TOTAL_SIZE, np->rx_ring, np->rx_ring_dma);
pci_free_consistent(pdev, TX_TOTAL_SIZE, np->tx_ring, np->tx_ring_dma);
unregister_netdev (dev);
pci_iounmap(pdev, np->base);
pci_release_regions (pdev);
free_netdev (dev);
pci_set_drvdata(pdev, NULL);
}
static struct pci_driver yellowfin_driver = {
.name = DRV_NAME,
.id_table = yellowfin_pci_tbl,
.probe = yellowfin_init_one,
.remove = __devexit_p(yellowfin_remove_one),
};
static int __init yellowfin_init (void)
{
/* when a module, this is printed whether or not devices are found in probe */
#ifdef MODULE
printk(version);
#endif
drivers/net: Remove deprecated use of pci_module_init() From: Michal Piotrowski <michal.k.k.piotrowski@gmail.com> Signed-off-by: Michal Piotrowski <michal.k.k.piotrowski@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-08-19 15:48:59 -06:00
return pci_register_driver(&yellowfin_driver);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
}
static void __exit yellowfin_cleanup (void)
{
pci_unregister_driver (&yellowfin_driver);
}
module_init(yellowfin_init);
module_exit(yellowfin_cleanup);
drivers/net: Trim trailing whitespace Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-09-13 11:24:59 -06:00
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
/*
* Local variables:
* compile-command: "gcc -DMODULE -Wall -Wstrict-prototypes -O6 -c yellowfin.c"
* compile-command-alphaLX: "gcc -DMODULE -Wall -Wstrict-prototypes -O2 -c yellowfin.c -fomit-frame-pointer -fno-strength-reduce -mno-fp-regs -Wa,-m21164a -DBWX_USABLE -DBWIO_ENABLED"
* simple-compile-command: "gcc -DMODULE -O6 -c yellowfin.c"
* c-indent-level: 4
* c-basic-offset: 4
* tab-width: 4
* End:
*/
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