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linux_dsm_epyc7002/drivers/net/tc35815.c
David Howells 7d12e780e0 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 15:10:12 +01:00

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/* tc35815.c: A TOSHIBA TC35815CF PCI 10/100Mbps ethernet driver for linux.
*
* Copyright 2001 MontaVista Software Inc.
* Author: MontaVista Software, Inc.
* ahennessy@mvista.com
*
* Based on skelton.c by Donald Becker.
* Copyright (C) 2000-2001 Toshiba Corporation
*
* 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 the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*/
static const char *version =
"tc35815.c:v0.00 26/07/2000 by Toshiba Corporation\n";
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/fcntl.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/in.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/delay.h>
#include <linux/pci.h>
#include <linux/proc_fs.h>
#include <linux/spinlock.h>
#include <linux/bitops.h>
#include <asm/system.h>
#include <asm/io.h>
#include <asm/dma.h>
#include <asm/byteorder.h>
/*
* The name of the card. Is used for messages and in the requests for
* io regions, irqs and dma channels
*/
static const char* cardname = "TC35815CF";
#define TC35815_PROC_ENTRY "net/tc35815"
#define TC35815_MODULE_NAME "TC35815CF"
#define TX_TIMEOUT (4*HZ)
/* First, a few definitions that the brave might change. */
/* use 0 for production, 1 for verification, >2 for debug */
#ifndef TC35815_DEBUG
#define TC35815_DEBUG 1
#endif
static unsigned int tc35815_debug = TC35815_DEBUG;
#define GATHER_TXINT /* On-Demand Tx Interrupt */
#define vtonocache(p) KSEG1ADDR(virt_to_phys(p))
/*
* Registers
*/
struct tc35815_regs {
volatile __u32 DMA_Ctl; /* 0x00 */
volatile __u32 TxFrmPtr;
volatile __u32 TxThrsh;
volatile __u32 TxPollCtr;
volatile __u32 BLFrmPtr;
volatile __u32 RxFragSize;
volatile __u32 Int_En;
volatile __u32 FDA_Bas;
volatile __u32 FDA_Lim; /* 0x20 */
volatile __u32 Int_Src;
volatile __u32 unused0[2];
volatile __u32 PauseCnt;
volatile __u32 RemPauCnt;
volatile __u32 TxCtlFrmStat;
volatile __u32 unused1;
volatile __u32 MAC_Ctl; /* 0x40 */
volatile __u32 CAM_Ctl;
volatile __u32 Tx_Ctl;
volatile __u32 Tx_Stat;
volatile __u32 Rx_Ctl;
volatile __u32 Rx_Stat;
volatile __u32 MD_Data;
volatile __u32 MD_CA;
volatile __u32 CAM_Adr; /* 0x60 */
volatile __u32 CAM_Data;
volatile __u32 CAM_Ena;
volatile __u32 PROM_Ctl;
volatile __u32 PROM_Data;
volatile __u32 Algn_Cnt;
volatile __u32 CRC_Cnt;
volatile __u32 Miss_Cnt;
};
/*
* Bit assignments
*/
/* DMA_Ctl bit asign ------------------------------------------------------- */
#define DMA_IntMask 0x00040000 /* 1:Interupt mask */
#define DMA_SWIntReq 0x00020000 /* 1:Software Interrupt request */
#define DMA_TxWakeUp 0x00010000 /* 1:Transmit Wake Up */
#define DMA_RxBigE 0x00008000 /* 1:Receive Big Endian */
#define DMA_TxBigE 0x00004000 /* 1:Transmit Big Endian */
#define DMA_TestMode 0x00002000 /* 1:Test Mode */
#define DMA_PowrMgmnt 0x00001000 /* 1:Power Management */
#define DMA_DmBurst_Mask 0x000001fc /* DMA Burst size */
/* RxFragSize bit asign ---------------------------------------------------- */
#define RxFrag_EnPack 0x00008000 /* 1:Enable Packing */
#define RxFrag_MinFragMask 0x00000ffc /* Minimum Fragment */
/* MAC_Ctl bit asign ------------------------------------------------------- */
#define MAC_Link10 0x00008000 /* 1:Link Status 10Mbits */
#define MAC_EnMissRoll 0x00002000 /* 1:Enable Missed Roll */
#define MAC_MissRoll 0x00000400 /* 1:Missed Roll */
#define MAC_Loop10 0x00000080 /* 1:Loop 10 Mbps */
#define MAC_Conn_Auto 0x00000000 /*00:Connection mode (Automatic) */
#define MAC_Conn_10M 0x00000020 /*01: (10Mbps endec)*/
#define MAC_Conn_Mll 0x00000040 /*10: (Mll clock) */
#define MAC_MacLoop 0x00000010 /* 1:MAC Loopback */
#define MAC_FullDup 0x00000008 /* 1:Full Duplex 0:Half Duplex */
#define MAC_Reset 0x00000004 /* 1:Software Reset */
#define MAC_HaltImm 0x00000002 /* 1:Halt Immediate */
#define MAC_HaltReq 0x00000001 /* 1:Halt request */
/* PROM_Ctl bit asign ------------------------------------------------------ */
#define PROM_Busy 0x00008000 /* 1:Busy (Start Operation) */
#define PROM_Read 0x00004000 /*10:Read operation */
#define PROM_Write 0x00002000 /*01:Write operation */
#define PROM_Erase 0x00006000 /*11:Erase operation */
/*00:Enable or Disable Writting, */
/* as specified in PROM_Addr. */
#define PROM_Addr_Ena 0x00000030 /*11xxxx:PROM Write enable */
/*00xxxx: disable */
/* CAM_Ctl bit asign ------------------------------------------------------- */
#define CAM_CompEn 0x00000010 /* 1:CAM Compare Enable */
#define CAM_NegCAM 0x00000008 /* 1:Reject packets CAM recognizes,*/
/* accept other */
#define CAM_BroadAcc 0x00000004 /* 1:Broadcast assept */
#define CAM_GroupAcc 0x00000002 /* 1:Multicast assept */
#define CAM_StationAcc 0x00000001 /* 1:unicast accept */
/* CAM_Ena bit asign ------------------------------------------------------- */
#define CAM_ENTRY_MAX 21 /* CAM Data entry max count */
#define CAM_Ena_Mask ((1<<CAM_ENTRY_MAX)-1) /* CAM Enable bits (Max 21bits) */
#define CAM_Ena_Bit(index) (1<<(index))
#define CAM_ENTRY_DESTINATION 0
#define CAM_ENTRY_SOURCE 1
#define CAM_ENTRY_MACCTL 20
/* Tx_Ctl bit asign -------------------------------------------------------- */
#define Tx_En 0x00000001 /* 1:Transmit enable */
#define Tx_TxHalt 0x00000002 /* 1:Transmit Halt Request */
#define Tx_NoPad 0x00000004 /* 1:Suppress Padding */
#define Tx_NoCRC 0x00000008 /* 1:Suppress Padding */
#define Tx_FBack 0x00000010 /* 1:Fast Back-off */
#define Tx_EnUnder 0x00000100 /* 1:Enable Underrun */
#define Tx_EnExDefer 0x00000200 /* 1:Enable Excessive Deferral */
#define Tx_EnLCarr 0x00000400 /* 1:Enable Lost Carrier */
#define Tx_EnExColl 0x00000800 /* 1:Enable Excessive Collision */
#define Tx_EnLateColl 0x00001000 /* 1:Enable Late Collision */
#define Tx_EnTxPar 0x00002000 /* 1:Enable Transmit Parity */
#define Tx_EnComp 0x00004000 /* 1:Enable Completion */
/* Tx_Stat bit asign ------------------------------------------------------- */
#define Tx_TxColl_MASK 0x0000000F /* Tx Collision Count */
#define Tx_ExColl 0x00000010 /* Excessive Collision */
#define Tx_TXDefer 0x00000020 /* Transmit Defered */
#define Tx_Paused 0x00000040 /* Transmit Paused */
#define Tx_IntTx 0x00000080 /* Interrupt on Tx */
#define Tx_Under 0x00000100 /* Underrun */
#define Tx_Defer 0x00000200 /* Deferral */
#define Tx_NCarr 0x00000400 /* No Carrier */
#define Tx_10Stat 0x00000800 /* 10Mbps Status */
#define Tx_LateColl 0x00001000 /* Late Collision */
#define Tx_TxPar 0x00002000 /* Tx Parity Error */
#define Tx_Comp 0x00004000 /* Completion */
#define Tx_Halted 0x00008000 /* Tx Halted */
#define Tx_SQErr 0x00010000 /* Signal Quality Error(SQE) */
/* Rx_Ctl bit asign -------------------------------------------------------- */
#define Rx_EnGood 0x00004000 /* 1:Enable Good */
#define Rx_EnRxPar 0x00002000 /* 1:Enable Receive Parity */
#define Rx_EnLongErr 0x00000800 /* 1:Enable Long Error */
#define Rx_EnOver 0x00000400 /* 1:Enable OverFlow */
#define Rx_EnCRCErr 0x00000200 /* 1:Enable CRC Error */
#define Rx_EnAlign 0x00000100 /* 1:Enable Alignment */
#define Rx_IgnoreCRC 0x00000040 /* 1:Ignore CRC Value */
#define Rx_StripCRC 0x00000010 /* 1:Strip CRC Value */
#define Rx_ShortEn 0x00000008 /* 1:Short Enable */
#define Rx_LongEn 0x00000004 /* 1:Long Enable */
#define Rx_RxHalt 0x00000002 /* 1:Receive Halt Request */
#define Rx_RxEn 0x00000001 /* 1:Receive Intrrupt Enable */
/* Rx_Stat bit asign ------------------------------------------------------- */
#define Rx_Halted 0x00008000 /* Rx Halted */
#define Rx_Good 0x00004000 /* Rx Good */
#define Rx_RxPar 0x00002000 /* Rx Parity Error */
/* 0x00001000 not use */
#define Rx_LongErr 0x00000800 /* Rx Long Error */
#define Rx_Over 0x00000400 /* Rx Overflow */
#define Rx_CRCErr 0x00000200 /* Rx CRC Error */
#define Rx_Align 0x00000100 /* Rx Alignment Error */
#define Rx_10Stat 0x00000080 /* Rx 10Mbps Status */
#define Rx_IntRx 0x00000040 /* Rx Interrupt */
#define Rx_CtlRecd 0x00000020 /* Rx Control Receive */
#define Rx_Stat_Mask 0x0000EFC0 /* Rx All Status Mask */
/* Int_En bit asign -------------------------------------------------------- */
#define Int_NRAbtEn 0x00000800 /* 1:Non-recoverable Abort Enable */
#define Int_TxCtlCmpEn 0x00000400 /* 1:Transmit Control Complete Enable */
#define Int_DmParErrEn 0x00000200 /* 1:DMA Parity Error Enable */
#define Int_DParDEn 0x00000100 /* 1:Data Parity Error Enable */
#define Int_EarNotEn 0x00000080 /* 1:Early Notify Enable */
#define Int_DParErrEn 0x00000040 /* 1:Detected Parity Error Enable */
#define Int_SSysErrEn 0x00000020 /* 1:Signalled System Error Enable */
#define Int_RMasAbtEn 0x00000010 /* 1:Received Master Abort Enable */
#define Int_RTargAbtEn 0x00000008 /* 1:Received Target Abort Enable */
#define Int_STargAbtEn 0x00000004 /* 1:Signalled Target Abort Enable */
#define Int_BLExEn 0x00000002 /* 1:Buffer List Exhausted Enable */
#define Int_FDAExEn 0x00000001 /* 1:Free Descriptor Area */
/* Exhausted Enable */
/* Int_Src bit asign ------------------------------------------------------- */
#define Int_NRabt 0x00004000 /* 1:Non Recoverable error */
#define Int_DmParErrStat 0x00002000 /* 1:DMA Parity Error & Clear */
#define Int_BLEx 0x00001000 /* 1:Buffer List Empty & Clear */
#define Int_FDAEx 0x00000800 /* 1:FDA Empty & Clear */
#define Int_IntNRAbt 0x00000400 /* 1:Non Recoverable Abort */
#define Int_IntCmp 0x00000200 /* 1:MAC control packet complete */
#define Int_IntExBD 0x00000100 /* 1:Interrupt Extra BD & Clear */
#define Int_DmParErr 0x00000080 /* 1:DMA Parity Error & Clear */
#define Int_IntEarNot 0x00000040 /* 1:Receive Data write & Clear */
#define Int_SWInt 0x00000020 /* 1:Software request & Clear */
#define Int_IntBLEx 0x00000010 /* 1:Buffer List Empty & Clear */
#define Int_IntFDAEx 0x00000008 /* 1:FDA Empty & Clear */
#define Int_IntPCI 0x00000004 /* 1:PCI controller & Clear */
#define Int_IntMacRx 0x00000002 /* 1:Rx controller & Clear */
#define Int_IntMacTx 0x00000001 /* 1:Tx controller & Clear */
/* MD_CA bit asign --------------------------------------------------------- */
#define MD_CA_PreSup 0x00001000 /* 1:Preamble Supress */
#define MD_CA_Busy 0x00000800 /* 1:Busy (Start Operation) */
#define MD_CA_Wr 0x00000400 /* 1:Write 0:Read */
/* MII register offsets */
#define MII_CONTROL 0x0000
#define MII_STATUS 0x0001
#define MII_PHY_ID0 0x0002
#define MII_PHY_ID1 0x0003
#define MII_ANAR 0x0004
#define MII_ANLPAR 0x0005
#define MII_ANER 0x0006
/* MII Control register bit definitions. */
#define MIICNTL_FDX 0x0100
#define MIICNTL_RST_AUTO 0x0200
#define MIICNTL_ISOLATE 0x0400
#define MIICNTL_PWRDWN 0x0800
#define MIICNTL_AUTO 0x1000
#define MIICNTL_SPEED 0x2000
#define MIICNTL_LPBK 0x4000
#define MIICNTL_RESET 0x8000
/* MII Status register bit significance. */
#define MIISTAT_EXT 0x0001
#define MIISTAT_JAB 0x0002
#define MIISTAT_LINK 0x0004
#define MIISTAT_CAN_AUTO 0x0008
#define MIISTAT_FAULT 0x0010
#define MIISTAT_AUTO_DONE 0x0020
#define MIISTAT_CAN_T 0x0800
#define MIISTAT_CAN_T_FDX 0x1000
#define MIISTAT_CAN_TX 0x2000
#define MIISTAT_CAN_TX_FDX 0x4000
#define MIISTAT_CAN_T4 0x8000
/* MII Auto-Negotiation Expansion/RemoteEnd Register Bits */
#define MII_AN_TX_FDX 0x0100
#define MII_AN_TX_HDX 0x0080
#define MII_AN_10_FDX 0x0040
#define MII_AN_10_HDX 0x0020
/*
* Descriptors
*/
/* Frame descripter */
struct FDesc {
volatile __u32 FDNext;
volatile __u32 FDSystem;
volatile __u32 FDStat;
volatile __u32 FDCtl;
};
/* Buffer descripter */
struct BDesc {
volatile __u32 BuffData;
volatile __u32 BDCtl;
};
#define FD_ALIGN 16
/* Frame Descripter bit asign ---------------------------------------------- */
#define FD_FDLength_MASK 0x0000FFFF /* Length MASK */
#define FD_BDCnt_MASK 0x001F0000 /* BD count MASK in FD */
#define FD_FrmOpt_MASK 0x7C000000 /* Frame option MASK */
#define FD_FrmOpt_BigEndian 0x40000000 /* Tx/Rx */
#define FD_FrmOpt_IntTx 0x20000000 /* Tx only */
#define FD_FrmOpt_NoCRC 0x10000000 /* Tx only */
#define FD_FrmOpt_NoPadding 0x08000000 /* Tx only */
#define FD_FrmOpt_Packing 0x04000000 /* Rx only */
#define FD_CownsFD 0x80000000 /* FD Controller owner bit */
#define FD_Next_EOL 0x00000001 /* FD EOL indicator */
#define FD_BDCnt_SHIFT 16
/* Buffer Descripter bit asign --------------------------------------------- */
#define BD_BuffLength_MASK 0x0000FFFF /* Recieve Data Size */
#define BD_RxBDID_MASK 0x00FF0000 /* BD ID Number MASK */
#define BD_RxBDSeqN_MASK 0x7F000000 /* Rx BD Sequence Number */
#define BD_CownsBD 0x80000000 /* BD Controller owner bit */
#define BD_RxBDID_SHIFT 16
#define BD_RxBDSeqN_SHIFT 24
/* Some useful constants. */
#undef NO_CHECK_CARRIER /* Does not check No-Carrier with TP */
#ifdef NO_CHECK_CARRIER
#define TX_CTL_CMD (Tx_EnComp | Tx_EnTxPar | Tx_EnLateColl | \
Tx_EnExColl | Tx_EnLCarr | Tx_EnExDefer | Tx_EnUnder | \
Tx_En) /* maybe 0x7d01 */
#else
#define TX_CTL_CMD (Tx_EnComp | Tx_EnTxPar | Tx_EnLateColl | \
Tx_EnExColl | Tx_EnExDefer | Tx_EnUnder | \
Tx_En) /* maybe 0x7f01 */
#endif
#define RX_CTL_CMD (Rx_EnGood | Rx_EnRxPar | Rx_EnLongErr | Rx_EnOver \
| Rx_EnCRCErr | Rx_EnAlign | Rx_RxEn) /* maybe 0x6f01 */
#define INT_EN_CMD (Int_NRAbtEn | \
Int_DParDEn | Int_DParErrEn | \
Int_SSysErrEn | Int_RMasAbtEn | Int_RTargAbtEn | \
Int_STargAbtEn | \
Int_BLExEn | Int_FDAExEn) /* maybe 0xb7f*/
/* Tuning parameters */
#define DMA_BURST_SIZE 32
#define TX_THRESHOLD 1024
#define FD_PAGE_NUM 2
#define FD_PAGE_ORDER 1
/* 16 + RX_BUF_PAGES * 8 + RX_FD_NUM * 16 + TX_FD_NUM * 32 <= PAGE_SIZE*2 */
#define RX_BUF_PAGES 8 /* >= 2 */
#define RX_FD_NUM 250 /* >= 32 */
#define TX_FD_NUM 128
struct TxFD {
struct FDesc fd;
struct BDesc bd;
struct BDesc unused;
};
struct RxFD {
struct FDesc fd;
struct BDesc bd[0]; /* variable length */
};
struct FrFD {
struct FDesc fd;
struct BDesc bd[RX_BUF_PAGES];
};
extern unsigned long tc_readl(volatile __u32 *addr);
extern void tc_writel(unsigned long data, volatile __u32 *addr);
dma_addr_t priv_dma_handle;
/* Information that need to be kept for each board. */
struct tc35815_local {
struct net_device *next_module;
/* statistics */
struct net_device_stats stats;
struct {
int max_tx_qlen;
int tx_ints;
int rx_ints;
} lstats;
int tbusy;
int option;
#define TC35815_OPT_AUTO 0x00
#define TC35815_OPT_10M 0x01
#define TC35815_OPT_100M 0x02
#define TC35815_OPT_FULLDUP 0x04
int linkspeed; /* 10 or 100 */
int fullduplex;
/*
* Transmitting: Batch Mode.
* 1 BD in 1 TxFD.
* Receiving: Packing Mode.
* 1 circular FD for Free Buffer List.
* RX_BUG_PAGES BD in Free Buffer FD.
* One Free Buffer BD has PAGE_SIZE data buffer.
*/
struct pci_dev *pdev;
dma_addr_t fd_buf_dma_handle;
void * fd_buf; /* for TxFD, TxFD, FrFD */
struct TxFD *tfd_base;
int tfd_start;
int tfd_end;
struct RxFD *rfd_base;
struct RxFD *rfd_limit;
struct RxFD *rfd_cur;
struct FrFD *fbl_ptr;
unsigned char fbl_curid;
dma_addr_t data_buf_dma_handle[RX_BUF_PAGES];
void * data_buf[RX_BUF_PAGES]; /* packing */
spinlock_t lock;
};
/* Index to functions, as function prototypes. */
static int __devinit tc35815_probe1(struct pci_dev *pdev, unsigned int base_addr, unsigned int irq);
static int tc35815_open(struct net_device *dev);
static int tc35815_send_packet(struct sk_buff *skb, struct net_device *dev);
static void tc35815_tx_timeout(struct net_device *dev);
static irqreturn_t tc35815_interrupt(int irq, void *dev_id);
static void tc35815_rx(struct net_device *dev);
static void tc35815_txdone(struct net_device *dev);
static int tc35815_close(struct net_device *dev);
static struct net_device_stats *tc35815_get_stats(struct net_device *dev);
static void tc35815_set_multicast_list(struct net_device *dev);
static void tc35815_chip_reset(struct net_device *dev);
static void tc35815_chip_init(struct net_device *dev);
static void tc35815_phy_chip_init(struct net_device *dev);
/* A list of all installed tc35815 devices. */
static struct net_device *root_tc35815_dev = NULL;
/*
* PCI device identifiers for "new style" Linux PCI Device Drivers
*/
static struct pci_device_id tc35815_pci_tbl[] = {
{ PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC35815CF, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
{ 0, }
};
MODULE_DEVICE_TABLE (pci, tc35815_pci_tbl);
int
tc35815_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
int err = 0;
int ret;
unsigned long pci_memaddr;
unsigned int pci_irq_line;
printk(KERN_INFO "tc35815_probe: found device %#08x.%#08x\n", ent->vendor, ent->device);
err = pci_enable_device(pdev);
if (err)
return err;
pci_memaddr = pci_resource_start (pdev, 1);
printk(KERN_INFO " pci_memaddr=%#08lx resource_flags=%#08lx\n", pci_memaddr, pci_resource_flags (pdev, 0));
if (!pci_memaddr) {
printk(KERN_WARNING "no PCI MEM resources, aborting\n");
ret = -ENODEV;
goto err_out;
}
pci_irq_line = pdev->irq;
/* irq disabled. */
if (pci_irq_line == 0) {
printk(KERN_WARNING "no PCI irq, aborting\n");
ret = -ENODEV;
goto err_out;
}
ret = tc35815_probe1(pdev, pci_memaddr, pci_irq_line);
if (ret)
goto err_out;
pci_set_master(pdev);
return 0;
err_out:
pci_disable_device(pdev);
return ret;
}
static int __devinit tc35815_probe1(struct pci_dev *pdev, unsigned int base_addr, unsigned int irq)
{
static unsigned version_printed = 0;
int i, ret;
struct tc35815_local *lp;
struct tc35815_regs *tr;
struct net_device *dev;
/* Allocate a new 'dev' if needed. */
dev = alloc_etherdev(sizeof(struct tc35815_local));
if (dev == NULL)
return -ENOMEM;
/*
* alloc_etherdev allocs and zeros dev->priv
*/
lp = dev->priv;
if (tc35815_debug && version_printed++ == 0)
printk(KERN_DEBUG "%s", version);
/* Fill in the 'dev' fields. */
dev->irq = irq;
dev->base_addr = (unsigned long)ioremap(base_addr,
sizeof(struct tc35815_regs));
if (!dev->base_addr) {
ret = -ENOMEM;
goto err_out;
}
tr = (struct tc35815_regs*)dev->base_addr;
tc35815_chip_reset(dev);
/* Retrieve and print the ethernet address. */
while (tc_readl(&tr->PROM_Ctl) & PROM_Busy)
;
for (i = 0; i < 6; i += 2) {
unsigned short data;
tc_writel(PROM_Busy | PROM_Read | (i / 2 + 2), &tr->PROM_Ctl);
while (tc_readl(&tr->PROM_Ctl) & PROM_Busy)
;
data = tc_readl(&tr->PROM_Data);
dev->dev_addr[i] = data & 0xff;
dev->dev_addr[i+1] = data >> 8;
}
/* Initialize the device structure. */
lp->pdev = pdev;
lp->next_module = root_tc35815_dev;
root_tc35815_dev = dev;
spin_lock_init(&lp->lock);
if (dev->mem_start > 0) {
lp->option = dev->mem_start;
if ((lp->option & TC35815_OPT_10M) &&
(lp->option & TC35815_OPT_100M)) {
/* if both speed speficied, auto select. */
lp->option &= ~(TC35815_OPT_10M | TC35815_OPT_100M);
}
}
//XXX fixme
lp->option |= TC35815_OPT_10M;
/* do auto negotiation */
tc35815_phy_chip_init(dev);
dev->open = tc35815_open;
dev->stop = tc35815_close;
dev->tx_timeout = tc35815_tx_timeout;
dev->watchdog_timeo = TX_TIMEOUT;
dev->hard_start_xmit = tc35815_send_packet;
dev->get_stats = tc35815_get_stats;
dev->set_multicast_list = tc35815_set_multicast_list;
SET_MODULE_OWNER(dev);
SET_NETDEV_DEV(dev, &pdev->dev);
ret = register_netdev(dev);
if (ret)
goto err_out_iounmap;
printk(KERN_INFO "%s: %s found at %#x, irq %d, MAC",
dev->name, cardname, base_addr, irq);
for (i = 0; i < 6; i++)
printk(" %2.2x", dev->dev_addr[i]);
printk("\n");
printk(KERN_INFO "%s: linkspeed %dMbps, %s Duplex\n",
dev->name, lp->linkspeed, lp->fullduplex ? "Full" : "Half");
return 0;
err_out_iounmap:
iounmap((void *) dev->base_addr);
err_out:
free_netdev(dev);
return ret;
}
static int
tc35815_init_queues(struct net_device *dev)
{
struct tc35815_local *lp = dev->priv;
int i;
unsigned long fd_addr;
if (!lp->fd_buf) {
if (sizeof(struct FDesc) +
sizeof(struct BDesc) * RX_BUF_PAGES +
sizeof(struct FDesc) * RX_FD_NUM +
sizeof(struct TxFD) * TX_FD_NUM > PAGE_SIZE * FD_PAGE_NUM) {
printk(KERN_WARNING "%s: Invalid Queue Size.\n", dev->name);
return -ENOMEM;
}
if ((lp->fd_buf = (void *)__get_free_pages(GFP_KERNEL, FD_PAGE_ORDER)) == 0)
return -ENOMEM;
for (i = 0; i < RX_BUF_PAGES; i++) {
if ((lp->data_buf[i] = (void *)get_zeroed_page(GFP_KERNEL)) == 0) {
while (--i >= 0) {
free_page((unsigned long)lp->data_buf[i]);
lp->data_buf[i] = 0;
}
free_page((unsigned long)lp->fd_buf);
lp->fd_buf = 0;
return -ENOMEM;
}
#ifdef __mips__
dma_cache_wback_inv((unsigned long)lp->data_buf[i], PAGE_SIZE * FD_PAGE_NUM);
#endif
}
#ifdef __mips__
dma_cache_wback_inv((unsigned long)lp->fd_buf, PAGE_SIZE * FD_PAGE_NUM);
#endif
} else {
clear_page(lp->fd_buf);
#ifdef __mips__
dma_cache_wback_inv((unsigned long)lp->fd_buf, PAGE_SIZE * FD_PAGE_NUM);
#endif
}
#ifdef __mips__
fd_addr = (unsigned long)vtonocache(lp->fd_buf);
#else
fd_addr = (unsigned long)lp->fd_buf;
#endif
/* Free Descriptors (for Receive) */
lp->rfd_base = (struct RxFD *)fd_addr;
fd_addr += sizeof(struct RxFD) * RX_FD_NUM;
for (i = 0; i < RX_FD_NUM; i++) {
lp->rfd_base[i].fd.FDCtl = cpu_to_le32(FD_CownsFD);
}
lp->rfd_cur = lp->rfd_base;
lp->rfd_limit = (struct RxFD *)(fd_addr -
sizeof(struct FDesc) -
sizeof(struct BDesc) * 30);
/* Transmit Descriptors */
lp->tfd_base = (struct TxFD *)fd_addr;
fd_addr += sizeof(struct TxFD) * TX_FD_NUM;
for (i = 0; i < TX_FD_NUM; i++) {
lp->tfd_base[i].fd.FDNext = cpu_to_le32(virt_to_bus(&lp->tfd_base[i+1]));
lp->tfd_base[i].fd.FDSystem = cpu_to_le32(0);
lp->tfd_base[i].fd.FDCtl = cpu_to_le32(0);
}
lp->tfd_base[TX_FD_NUM-1].fd.FDNext = cpu_to_le32(virt_to_bus(&lp->tfd_base[0]));
lp->tfd_start = 0;
lp->tfd_end = 0;
/* Buffer List (for Receive) */
lp->fbl_ptr = (struct FrFD *)fd_addr;
lp->fbl_ptr->fd.FDNext = cpu_to_le32(virt_to_bus(lp->fbl_ptr));
lp->fbl_ptr->fd.FDCtl = cpu_to_le32(RX_BUF_PAGES | FD_CownsFD);
for (i = 0; i < RX_BUF_PAGES; i++) {
lp->fbl_ptr->bd[i].BuffData = cpu_to_le32(virt_to_bus(lp->data_buf[i]));
/* BDID is index of FrFD.bd[] */
lp->fbl_ptr->bd[i].BDCtl =
cpu_to_le32(BD_CownsBD | (i << BD_RxBDID_SHIFT) | PAGE_SIZE);
}
lp->fbl_curid = 0;
return 0;
}
static void
tc35815_clear_queues(struct net_device *dev)
{
struct tc35815_local *lp = dev->priv;
int i;
for (i = 0; i < TX_FD_NUM; i++) {
struct sk_buff *skb = (struct sk_buff *)
le32_to_cpu(lp->tfd_base[i].fd.FDSystem);
if (skb)
dev_kfree_skb_any(skb);
lp->tfd_base[i].fd.FDSystem = cpu_to_le32(0);
}
tc35815_init_queues(dev);
}
static void
tc35815_free_queues(struct net_device *dev)
{
struct tc35815_local *lp = dev->priv;
int i;
if (lp->tfd_base) {
for (i = 0; i < TX_FD_NUM; i++) {
struct sk_buff *skb = (struct sk_buff *)
le32_to_cpu(lp->tfd_base[i].fd.FDSystem);
if (skb)
dev_kfree_skb_any(skb);
lp->tfd_base[i].fd.FDSystem = cpu_to_le32(0);
}
}
lp->rfd_base = NULL;
lp->rfd_base = NULL;
lp->rfd_limit = NULL;
lp->rfd_cur = NULL;
lp->fbl_ptr = NULL;
for (i = 0; i < RX_BUF_PAGES; i++) {
if (lp->data_buf[i])
free_page((unsigned long)lp->data_buf[i]);
lp->data_buf[i] = 0;
}
if (lp->fd_buf)
__free_pages(lp->fd_buf, FD_PAGE_ORDER);
lp->fd_buf = NULL;
}
static void
dump_txfd(struct TxFD *fd)
{
printk("TxFD(%p): %08x %08x %08x %08x\n", fd,
le32_to_cpu(fd->fd.FDNext),
le32_to_cpu(fd->fd.FDSystem),
le32_to_cpu(fd->fd.FDStat),
le32_to_cpu(fd->fd.FDCtl));
printk("BD: ");
printk(" %08x %08x",
le32_to_cpu(fd->bd.BuffData),
le32_to_cpu(fd->bd.BDCtl));
printk("\n");
}
static int
dump_rxfd(struct RxFD *fd)
{
int i, bd_count = (le32_to_cpu(fd->fd.FDCtl) & FD_BDCnt_MASK) >> FD_BDCnt_SHIFT;
if (bd_count > 8)
bd_count = 8;
printk("RxFD(%p): %08x %08x %08x %08x\n", fd,
le32_to_cpu(fd->fd.FDNext),
le32_to_cpu(fd->fd.FDSystem),
le32_to_cpu(fd->fd.FDStat),
le32_to_cpu(fd->fd.FDCtl));
if (le32_to_cpu(fd->fd.FDCtl) & FD_CownsFD)
return 0;
printk("BD: ");
for (i = 0; i < bd_count; i++)
printk(" %08x %08x",
le32_to_cpu(fd->bd[i].BuffData),
le32_to_cpu(fd->bd[i].BDCtl));
printk("\n");
return bd_count;
}
static void
dump_frfd(struct FrFD *fd)
{
int i;
printk("FrFD(%p): %08x %08x %08x %08x\n", fd,
le32_to_cpu(fd->fd.FDNext),
le32_to_cpu(fd->fd.FDSystem),
le32_to_cpu(fd->fd.FDStat),
le32_to_cpu(fd->fd.FDCtl));
printk("BD: ");
for (i = 0; i < RX_BUF_PAGES; i++)
printk(" %08x %08x",
le32_to_cpu(fd->bd[i].BuffData),
le32_to_cpu(fd->bd[i].BDCtl));
printk("\n");
}
static void
panic_queues(struct net_device *dev)
{
struct tc35815_local *lp = dev->priv;
int i;
printk("TxFD base %p, start %d, end %d\n",
lp->tfd_base, lp->tfd_start, lp->tfd_end);
printk("RxFD base %p limit %p cur %p\n",
lp->rfd_base, lp->rfd_limit, lp->rfd_cur);
printk("FrFD %p\n", lp->fbl_ptr);
for (i = 0; i < TX_FD_NUM; i++)
dump_txfd(&lp->tfd_base[i]);
for (i = 0; i < RX_FD_NUM; i++) {
int bd_count = dump_rxfd(&lp->rfd_base[i]);
i += (bd_count + 1) / 2; /* skip BDs */
}
dump_frfd(lp->fbl_ptr);
panic("%s: Illegal queue state.", dev->name);
}
#if 0
static void print_buf(char *add, int length)
{
int i;
int len = length;
printk("print_buf(%08x)(%x)\n", (unsigned int) add,length);
if (len > 100)
len = 100;
for (i = 0; i < len; i++) {
printk(" %2.2X", (unsigned char) add[i]);
if (!(i % 16))
printk("\n");
}
printk("\n");
}
#endif
static void print_eth(char *add)
{
int i;
printk("print_eth(%08x)\n", (unsigned int) add);
for (i = 0; i < 6; i++)
printk(" %2.2X", (unsigned char) add[i + 6]);
printk(" =>");
for (i = 0; i < 6; i++)
printk(" %2.2X", (unsigned char) add[i]);
printk(" : %2.2X%2.2X\n", (unsigned char) add[12], (unsigned char) add[13]);
}
/*
* Open/initialize the board. This is called (in the current kernel)
* sometime after booting when the 'ifconfig' program is run.
*
* This routine should set everything up anew at each open, even
* registers that "should" only need to be set once at boot, so that
* there is non-reboot way to recover if something goes wrong.
*/
static int
tc35815_open(struct net_device *dev)
{
struct tc35815_local *lp = dev->priv;
/*
* This is used if the interrupt line can turned off (shared).
* See 3c503.c for an example of selecting the IRQ at config-time.
*/
if (dev->irq == 0 ||
request_irq(dev->irq, &tc35815_interrupt, IRQF_SHARED, cardname, dev)) {
return -EAGAIN;
}
tc35815_chip_reset(dev);
if (tc35815_init_queues(dev) != 0) {
free_irq(dev->irq, dev);
return -EAGAIN;
}
/* Reset the hardware here. Don't forget to set the station address. */
tc35815_chip_init(dev);
lp->tbusy = 0;
netif_start_queue(dev);
return 0;
}
static void tc35815_tx_timeout(struct net_device *dev)
{
struct tc35815_local *lp = dev->priv;
struct tc35815_regs *tr = (struct tc35815_regs *)dev->base_addr;
unsigned long flags;
spin_lock_irqsave(&lp->lock, flags);
printk(KERN_WARNING "%s: transmit timed out, status %#lx\n",
dev->name, tc_readl(&tr->Tx_Stat));
/* Try to restart the adaptor. */
tc35815_chip_reset(dev);
tc35815_clear_queues(dev);
tc35815_chip_init(dev);
lp->tbusy=0;
spin_unlock_irqrestore(&lp->lock, flags);
dev->trans_start = jiffies;
netif_wake_queue(dev);
}
static int tc35815_send_packet(struct sk_buff *skb, struct net_device *dev)
{
struct tc35815_local *lp = dev->priv;
struct tc35815_regs *tr = (struct tc35815_regs *)dev->base_addr;
if (netif_queue_stopped(dev)) {
/*
* If we get here, some higher level has decided we are broken.
* There should really be a "kick me" function call instead.
*/
int tickssofar = jiffies - dev->trans_start;
if (tickssofar < 5)
return 1;
printk(KERN_WARNING "%s: transmit timed out, status %#lx\n",
dev->name, tc_readl(&tr->Tx_Stat));
/* Try to restart the adaptor. */
tc35815_chip_reset(dev);
tc35815_clear_queues(dev);
tc35815_chip_init(dev);
lp->tbusy=0;
dev->trans_start = jiffies;
netif_wake_queue(dev);
}
/*
* Block a timer-based transmit from overlapping. This could better be
* done with atomic_swap(1, lp->tbusy), but set_bit() works as well.
*/
if (test_and_set_bit(0, (void*)&lp->tbusy) != 0) {
printk(KERN_WARNING "%s: Transmitter access conflict.\n", dev->name);
dev_kfree_skb_any(skb);
} else {
short length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
unsigned char *buf = skb->data;
struct TxFD *txfd = &lp->tfd_base[lp->tfd_start];
unsigned long flags;
lp->stats.tx_bytes += skb->len;
#ifdef __mips__
dma_cache_wback_inv((unsigned long)buf, length);
#endif
spin_lock_irqsave(&lp->lock, flags);
/* failsafe... */
if (lp->tfd_start != lp->tfd_end)
tc35815_txdone(dev);
txfd->bd.BuffData = cpu_to_le32(virt_to_bus(buf));
txfd->bd.BDCtl = cpu_to_le32(length);
txfd->fd.FDSystem = cpu_to_le32((__u32)skb);
txfd->fd.FDCtl = cpu_to_le32(FD_CownsFD | (1 << FD_BDCnt_SHIFT));
if (lp->tfd_start == lp->tfd_end) {
/* Start DMA Transmitter. */
txfd->fd.FDNext |= cpu_to_le32(FD_Next_EOL);
#ifdef GATHER_TXINT
txfd->fd.FDCtl |= cpu_to_le32(FD_FrmOpt_IntTx);
#endif
if (tc35815_debug > 2) {
printk("%s: starting TxFD.\n", dev->name);
dump_txfd(txfd);
if (tc35815_debug > 3)
print_eth(buf);
}
tc_writel(virt_to_bus(txfd), &tr->TxFrmPtr);
} else {
txfd->fd.FDNext &= cpu_to_le32(~FD_Next_EOL);
if (tc35815_debug > 2) {
printk("%s: queueing TxFD.\n", dev->name);
dump_txfd(txfd);
if (tc35815_debug > 3)
print_eth(buf);
}
}
lp->tfd_start = (lp->tfd_start + 1) % TX_FD_NUM;
dev->trans_start = jiffies;
if ((lp->tfd_start + 1) % TX_FD_NUM != lp->tfd_end) {
/* we can send another packet */
lp->tbusy = 0;
netif_start_queue(dev);
} else {
netif_stop_queue(dev);
if (tc35815_debug > 1)
printk(KERN_WARNING "%s: TxFD Exhausted.\n", dev->name);
}
spin_unlock_irqrestore(&lp->lock, flags);
}
return 0;
}
#define FATAL_ERROR_INT \
(Int_IntPCI | Int_DmParErr | Int_IntNRAbt)
static void tc35815_fatal_error_interrupt(struct net_device *dev, int status)
{
static int count;
printk(KERN_WARNING "%s: Fatal Error Intterrupt (%#x):",
dev->name, status);
if (status & Int_IntPCI)
printk(" IntPCI");
if (status & Int_DmParErr)
printk(" DmParErr");
if (status & Int_IntNRAbt)
printk(" IntNRAbt");
printk("\n");
if (count++ > 100)
panic("%s: Too many fatal errors.", dev->name);
printk(KERN_WARNING "%s: Resetting %s...\n", dev->name, cardname);
/* Try to restart the adaptor. */
tc35815_chip_reset(dev);
tc35815_clear_queues(dev);
tc35815_chip_init(dev);
}
/*
* The typical workload of the driver:
* Handle the network interface interrupts.
*/
static irqreturn_t tc35815_interrupt(int irq, void *dev_id)
{
struct net_device *dev = dev_id;
struct tc35815_regs *tr;
struct tc35815_local *lp;
int status, boguscount = 0;
int handled = 0;
if (dev == NULL) {
printk(KERN_WARNING "%s: irq %d for unknown device.\n", cardname, irq);
return IRQ_NONE;
}
tr = (struct tc35815_regs*)dev->base_addr;
lp = dev->priv;
do {
status = tc_readl(&tr->Int_Src);
if (status == 0)
break;
handled = 1;
tc_writel(status, &tr->Int_Src); /* write to clear */
/* Fatal errors... */
if (status & FATAL_ERROR_INT) {
tc35815_fatal_error_interrupt(dev, status);
break;
}
/* recoverable errors */
if (status & Int_IntFDAEx) {
/* disable FDAEx int. (until we make rooms...) */
tc_writel(tc_readl(&tr->Int_En) & ~Int_FDAExEn, &tr->Int_En);
printk(KERN_WARNING
"%s: Free Descriptor Area Exhausted (%#x).\n",
dev->name, status);
lp->stats.rx_dropped++;
}
if (status & Int_IntBLEx) {
/* disable BLEx int. (until we make rooms...) */
tc_writel(tc_readl(&tr->Int_En) & ~Int_BLExEn, &tr->Int_En);
printk(KERN_WARNING
"%s: Buffer List Exhausted (%#x).\n",
dev->name, status);
lp->stats.rx_dropped++;
}
if (status & Int_IntExBD) {
printk(KERN_WARNING
"%s: Excessive Buffer Descriptiors (%#x).\n",
dev->name, status);
lp->stats.rx_length_errors++;
}
/* normal notification */
if (status & Int_IntMacRx) {
/* Got a packet(s). */
lp->lstats.rx_ints++;
tc35815_rx(dev);
}
if (status & Int_IntMacTx) {
lp->lstats.tx_ints++;
tc35815_txdone(dev);
}
} while (++boguscount < 20) ;
return IRQ_RETVAL(handled);
}
/* We have a good packet(s), get it/them out of the buffers. */
static void
tc35815_rx(struct net_device *dev)
{
struct tc35815_local *lp = dev->priv;
struct tc35815_regs *tr = (struct tc35815_regs*)dev->base_addr;
unsigned int fdctl;
int i;
int buf_free_count = 0;
int fd_free_count = 0;
while (!((fdctl = le32_to_cpu(lp->rfd_cur->fd.FDCtl)) & FD_CownsFD)) {
int status = le32_to_cpu(lp->rfd_cur->fd.FDStat);
int pkt_len = fdctl & FD_FDLength_MASK;
struct RxFD *next_rfd;
int bd_count = (fdctl & FD_BDCnt_MASK) >> FD_BDCnt_SHIFT;
if (tc35815_debug > 2)
dump_rxfd(lp->rfd_cur);
if (status & Rx_Good) {
/* Malloc up new buffer. */
struct sk_buff *skb;
unsigned char *data;
int cur_bd, offset;
lp->stats.rx_bytes += pkt_len;
skb = dev_alloc_skb(pkt_len + 2); /* +2: for reserve */
if (skb == NULL) {
printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n",
dev->name);
lp->stats.rx_dropped++;
break;
}
skb_reserve(skb, 2); /* 16 bit alignment */
skb->dev = dev;
data = skb_put(skb, pkt_len);
/* copy from receive buffer */
cur_bd = 0;
offset = 0;
while (offset < pkt_len && cur_bd < bd_count) {
int len = le32_to_cpu(lp->rfd_cur->bd[cur_bd].BDCtl) &
BD_BuffLength_MASK;
void *rxbuf =
bus_to_virt(le32_to_cpu(lp->rfd_cur->bd[cur_bd].BuffData));
#ifdef __mips__
dma_cache_inv((unsigned long)rxbuf, len);
#endif
memcpy(data + offset, rxbuf, len);
offset += len;
cur_bd++;
}
#if 0
print_buf(data,pkt_len);
#endif
if (tc35815_debug > 3)
print_eth(data);
skb->protocol = eth_type_trans(skb, dev);
netif_rx(skb);
lp->stats.rx_packets++;
} else {
lp->stats.rx_errors++;
/* WORKAROUND: LongErr and CRCErr means Overflow. */
if ((status & Rx_LongErr) && (status & Rx_CRCErr)) {
status &= ~(Rx_LongErr|Rx_CRCErr);
status |= Rx_Over;
}
if (status & Rx_LongErr) lp->stats.rx_length_errors++;
if (status & Rx_Over) lp->stats.rx_fifo_errors++;
if (status & Rx_CRCErr) lp->stats.rx_crc_errors++;
if (status & Rx_Align) lp->stats.rx_frame_errors++;
}
if (bd_count > 0) {
/* put Free Buffer back to controller */
int bdctl = le32_to_cpu(lp->rfd_cur->bd[bd_count - 1].BDCtl);
unsigned char id =
(bdctl & BD_RxBDID_MASK) >> BD_RxBDID_SHIFT;
if (id >= RX_BUF_PAGES) {
printk("%s: invalid BDID.\n", dev->name);
panic_queues(dev);
}
/* free old buffers */
while (lp->fbl_curid != id) {
bdctl = le32_to_cpu(lp->fbl_ptr->bd[lp->fbl_curid].BDCtl);
if (bdctl & BD_CownsBD) {
printk("%s: Freeing invalid BD.\n",
dev->name);
panic_queues(dev);
}
/* pass BD to controler */
/* Note: BDLength was modified by chip. */
lp->fbl_ptr->bd[lp->fbl_curid].BDCtl =
cpu_to_le32(BD_CownsBD |
(lp->fbl_curid << BD_RxBDID_SHIFT) |
PAGE_SIZE);
lp->fbl_curid =
(lp->fbl_curid + 1) % RX_BUF_PAGES;
if (tc35815_debug > 2) {
printk("%s: Entering new FBD %d\n",
dev->name, lp->fbl_curid);
dump_frfd(lp->fbl_ptr);
}
buf_free_count++;
}
}
/* put RxFD back to controller */
next_rfd = bus_to_virt(le32_to_cpu(lp->rfd_cur->fd.FDNext));
#ifdef __mips__
next_rfd = (struct RxFD *)vtonocache(next_rfd);
#endif
if (next_rfd < lp->rfd_base || next_rfd > lp->rfd_limit) {
printk("%s: RxFD FDNext invalid.\n", dev->name);
panic_queues(dev);
}
for (i = 0; i < (bd_count + 1) / 2 + 1; i++) {
/* pass FD to controler */
lp->rfd_cur->fd.FDNext = cpu_to_le32(0xdeaddead); /* for debug */
lp->rfd_cur->fd.FDCtl = cpu_to_le32(FD_CownsFD);
lp->rfd_cur++;
fd_free_count++;
}
lp->rfd_cur = next_rfd;
}
/* re-enable BL/FDA Exhaust interrupts. */
if (fd_free_count) {
tc_writel(tc_readl(&tr->Int_En) | Int_FDAExEn, &tr->Int_En);
if (buf_free_count)
tc_writel(tc_readl(&tr->Int_En) | Int_BLExEn, &tr->Int_En);
}
}
#ifdef NO_CHECK_CARRIER
#define TX_STA_ERR (Tx_ExColl|Tx_Under|Tx_Defer|Tx_LateColl|Tx_TxPar|Tx_SQErr)
#else
#define TX_STA_ERR (Tx_ExColl|Tx_Under|Tx_Defer|Tx_NCarr|Tx_LateColl|Tx_TxPar|Tx_SQErr)
#endif
static void
tc35815_check_tx_stat(struct net_device *dev, int status)
{
struct tc35815_local *lp = dev->priv;
const char *msg = NULL;
/* count collisions */
if (status & Tx_ExColl)
lp->stats.collisions += 16;
if (status & Tx_TxColl_MASK)
lp->stats.collisions += status & Tx_TxColl_MASK;
/* WORKAROUND: ignore LostCrS in full duplex operation */
if (lp->fullduplex)
status &= ~Tx_NCarr;
if (!(status & TX_STA_ERR)) {
/* no error. */
lp->stats.tx_packets++;
return;
}
lp->stats.tx_errors++;
if (status & Tx_ExColl) {
lp->stats.tx_aborted_errors++;
msg = "Excessive Collision.";
}
if (status & Tx_Under) {
lp->stats.tx_fifo_errors++;
msg = "Tx FIFO Underrun.";
}
if (status & Tx_Defer) {
lp->stats.tx_fifo_errors++;
msg = "Excessive Deferral.";
}
#ifndef NO_CHECK_CARRIER
if (status & Tx_NCarr) {
lp->stats.tx_carrier_errors++;
msg = "Lost Carrier Sense.";
}
#endif
if (status & Tx_LateColl) {
lp->stats.tx_aborted_errors++;
msg = "Late Collision.";
}
if (status & Tx_TxPar) {
lp->stats.tx_fifo_errors++;
msg = "Transmit Parity Error.";
}
if (status & Tx_SQErr) {
lp->stats.tx_heartbeat_errors++;
msg = "Signal Quality Error.";
}
if (msg)
printk(KERN_WARNING "%s: %s (%#x)\n", dev->name, msg, status);
}
static void
tc35815_txdone(struct net_device *dev)
{
struct tc35815_local *lp = dev->priv;
struct tc35815_regs *tr = (struct tc35815_regs*)dev->base_addr;
struct TxFD *txfd;
unsigned int fdctl;
int num_done = 0;
txfd = &lp->tfd_base[lp->tfd_end];
while (lp->tfd_start != lp->tfd_end &&
!((fdctl = le32_to_cpu(txfd->fd.FDCtl)) & FD_CownsFD)) {
int status = le32_to_cpu(txfd->fd.FDStat);
struct sk_buff *skb;
unsigned long fdnext = le32_to_cpu(txfd->fd.FDNext);
if (tc35815_debug > 2) {
printk("%s: complete TxFD.\n", dev->name);
dump_txfd(txfd);
}
tc35815_check_tx_stat(dev, status);
skb = (struct sk_buff *)le32_to_cpu(txfd->fd.FDSystem);
if (skb) {
dev_kfree_skb_any(skb);
}
txfd->fd.FDSystem = cpu_to_le32(0);
num_done++;
lp->tfd_end = (lp->tfd_end + 1) % TX_FD_NUM;
txfd = &lp->tfd_base[lp->tfd_end];
if ((fdnext & ~FD_Next_EOL) != virt_to_bus(txfd)) {
printk("%s: TxFD FDNext invalid.\n", dev->name);
panic_queues(dev);
}
if (fdnext & FD_Next_EOL) {
/* DMA Transmitter has been stopping... */
if (lp->tfd_end != lp->tfd_start) {
int head = (lp->tfd_start + TX_FD_NUM - 1) % TX_FD_NUM;
struct TxFD* txhead = &lp->tfd_base[head];
int qlen = (lp->tfd_start + TX_FD_NUM
- lp->tfd_end) % TX_FD_NUM;
if (!(le32_to_cpu(txfd->fd.FDCtl) & FD_CownsFD)) {
printk("%s: TxFD FDCtl invalid.\n", dev->name);
panic_queues(dev);
}
/* log max queue length */
if (lp->lstats.max_tx_qlen < qlen)
lp->lstats.max_tx_qlen = qlen;
/* start DMA Transmitter again */
txhead->fd.FDNext |= cpu_to_le32(FD_Next_EOL);
#ifdef GATHER_TXINT
txhead->fd.FDCtl |= cpu_to_le32(FD_FrmOpt_IntTx);
#endif
if (tc35815_debug > 2) {
printk("%s: start TxFD on queue.\n",
dev->name);
dump_txfd(txfd);
}
tc_writel(virt_to_bus(txfd), &tr->TxFrmPtr);
}
break;
}
}
if (num_done > 0 && lp->tbusy) {
lp->tbusy = 0;
netif_start_queue(dev);
}
}
/* The inverse routine to tc35815_open(). */
static int
tc35815_close(struct net_device *dev)
{
struct tc35815_local *lp = dev->priv;
lp->tbusy = 1;
netif_stop_queue(dev);
/* Flush the Tx and disable Rx here. */
tc35815_chip_reset(dev);
free_irq(dev->irq, dev);
tc35815_free_queues(dev);
return 0;
}
/*
* Get the current statistics.
* This may be called with the card open or closed.
*/
static struct net_device_stats *tc35815_get_stats(struct net_device *dev)
{
struct tc35815_local *lp = dev->priv;
struct tc35815_regs *tr = (struct tc35815_regs*)dev->base_addr;
unsigned long flags;
if (netif_running(dev)) {
spin_lock_irqsave(&lp->lock, flags);
/* Update the statistics from the device registers. */
lp->stats.rx_missed_errors = tc_readl(&tr->Miss_Cnt);
spin_unlock_irqrestore(&lp->lock, flags);
}
return &lp->stats;
}
static void tc35815_set_cam_entry(struct tc35815_regs *tr, int index, unsigned char *addr)
{
int cam_index = index * 6;
unsigned long cam_data;
unsigned long saved_addr;
saved_addr = tc_readl(&tr->CAM_Adr);
if (tc35815_debug > 1) {
int i;
printk(KERN_DEBUG "%s: CAM %d:", cardname, index);
for (i = 0; i < 6; i++)
printk(" %02x", addr[i]);
printk("\n");
}
if (index & 1) {
/* read modify write */
tc_writel(cam_index - 2, &tr->CAM_Adr);
cam_data = tc_readl(&tr->CAM_Data) & 0xffff0000;
cam_data |= addr[0] << 8 | addr[1];
tc_writel(cam_data, &tr->CAM_Data);
/* write whole word */
tc_writel(cam_index + 2, &tr->CAM_Adr);
cam_data = (addr[2] << 24) | (addr[3] << 16) | (addr[4] << 8) | addr[5];
tc_writel(cam_data, &tr->CAM_Data);
} else {
/* write whole word */
tc_writel(cam_index, &tr->CAM_Adr);
cam_data = (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) | addr[3];
tc_writel(cam_data, &tr->CAM_Data);
/* read modify write */
tc_writel(cam_index + 4, &tr->CAM_Adr);
cam_data = tc_readl(&tr->CAM_Data) & 0x0000ffff;
cam_data |= addr[4] << 24 | (addr[5] << 16);
tc_writel(cam_data, &tr->CAM_Data);
}
if (tc35815_debug > 2) {
int i;
for (i = cam_index / 4; i < cam_index / 4 + 2; i++) {
tc_writel(i * 4, &tr->CAM_Adr);
printk("CAM 0x%x: %08lx",
i * 4, tc_readl(&tr->CAM_Data));
}
}
tc_writel(saved_addr, &tr->CAM_Adr);
}
/*
* Set or clear the multicast filter for this adaptor.
* num_addrs == -1 Promiscuous mode, receive all packets
* num_addrs == 0 Normal mode, clear multicast list
* num_addrs > 0 Multicast mode, receive normal and MC packets,
* and do best-effort filtering.
*/
static void
tc35815_set_multicast_list(struct net_device *dev)
{
struct tc35815_regs *tr = (struct tc35815_regs*)dev->base_addr;
if (dev->flags&IFF_PROMISC)
{
/* Enable promiscuous mode */
tc_writel(CAM_CompEn | CAM_BroadAcc | CAM_GroupAcc | CAM_StationAcc, &tr->CAM_Ctl);
}
else if((dev->flags&IFF_ALLMULTI) || dev->mc_count > CAM_ENTRY_MAX - 3)
{
/* CAM 0, 1, 20 are reserved. */
/* Disable promiscuous mode, use normal mode. */
tc_writel(CAM_CompEn | CAM_BroadAcc | CAM_GroupAcc, &tr->CAM_Ctl);
}
else if(dev->mc_count)
{
struct dev_mc_list* cur_addr = dev->mc_list;
int i;
int ena_bits = CAM_Ena_Bit(CAM_ENTRY_SOURCE);
tc_writel(0, &tr->CAM_Ctl);
/* Walk the address list, and load the filter */
for (i = 0; i < dev->mc_count; i++, cur_addr = cur_addr->next) {
if (!cur_addr)
break;
/* entry 0,1 is reserved. */
tc35815_set_cam_entry(tr, i + 2, cur_addr->dmi_addr);
ena_bits |= CAM_Ena_Bit(i + 2);
}
tc_writel(ena_bits, &tr->CAM_Ena);
tc_writel(CAM_CompEn | CAM_BroadAcc, &tr->CAM_Ctl);
}
else {
tc_writel(CAM_Ena_Bit(CAM_ENTRY_SOURCE), &tr->CAM_Ena);
tc_writel(CAM_CompEn | CAM_BroadAcc, &tr->CAM_Ctl);
}
}
static unsigned long tc_phy_read(struct net_device *dev, struct tc35815_regs *tr, int phy, int phy_reg)
{
struct tc35815_local *lp = dev->priv;
unsigned long data;
unsigned long flags;
spin_lock_irqsave(&lp->lock, flags);
tc_writel(MD_CA_Busy | (phy << 5) | phy_reg, &tr->MD_CA);
while (tc_readl(&tr->MD_CA) & MD_CA_Busy)
;
data = tc_readl(&tr->MD_Data);
spin_unlock_irqrestore(&lp->lock, flags);
return data;
}
static void tc_phy_write(struct net_device *dev, unsigned long d, struct tc35815_regs *tr, int phy, int phy_reg)
{
struct tc35815_local *lp = dev->priv;
unsigned long flags;
spin_lock_irqsave(&lp->lock, flags);
tc_writel(d, &tr->MD_Data);
tc_writel(MD_CA_Busy | MD_CA_Wr | (phy << 5) | phy_reg, &tr->MD_CA);
while (tc_readl(&tr->MD_CA) & MD_CA_Busy)
;
spin_unlock_irqrestore(&lp->lock, flags);
}
static void tc35815_phy_chip_init(struct net_device *dev)
{
struct tc35815_local *lp = dev->priv;
struct tc35815_regs *tr = (struct tc35815_regs*)dev->base_addr;
static int first = 1;
unsigned short ctl;
if (first) {
unsigned short id0, id1;
int count;
first = 0;
/* first data written to the PHY will be an ID number */
tc_phy_write(dev, 0, tr, 0, MII_CONTROL); /* ID:0 */
#if 0
tc_phy_write(dev, MIICNTL_RESET, tr, 0, MII_CONTROL);
printk(KERN_INFO "%s: Resetting PHY...", dev->name);
while (tc_phy_read(dev, tr, 0, MII_CONTROL) & MIICNTL_RESET)
;
printk("\n");
tc_phy_write(dev, MIICNTL_AUTO|MIICNTL_SPEED|MIICNTL_FDX, tr, 0,
MII_CONTROL);
#endif
id0 = tc_phy_read(dev, tr, 0, MII_PHY_ID0);
id1 = tc_phy_read(dev, tr, 0, MII_PHY_ID1);
printk(KERN_DEBUG "%s: PHY ID %04x %04x\n", dev->name,
id0, id1);
if (lp->option & TC35815_OPT_10M) {
lp->linkspeed = 10;
lp->fullduplex = (lp->option & TC35815_OPT_FULLDUP) != 0;
} else if (lp->option & TC35815_OPT_100M) {
lp->linkspeed = 100;
lp->fullduplex = (lp->option & TC35815_OPT_FULLDUP) != 0;
} else {
/* auto negotiation */
unsigned long neg_result;
tc_phy_write(dev, MIICNTL_AUTO | MIICNTL_RST_AUTO, tr, 0, MII_CONTROL);
printk(KERN_INFO "%s: Auto Negotiation...", dev->name);
count = 0;
while (!(tc_phy_read(dev, tr, 0, MII_STATUS) & MIISTAT_AUTO_DONE)) {
if (count++ > 5000) {
printk(" failed. Assume 10Mbps\n");
lp->linkspeed = 10;
lp->fullduplex = 0;
goto done;
}
if (count % 512 == 0)
printk(".");
mdelay(1);
}
printk(" done.\n");
neg_result = tc_phy_read(dev, tr, 0, MII_ANLPAR);
if (neg_result & (MII_AN_TX_FDX | MII_AN_TX_HDX))
lp->linkspeed = 100;
else
lp->linkspeed = 10;
if (neg_result & (MII_AN_TX_FDX | MII_AN_10_FDX))
lp->fullduplex = 1;
else
lp->fullduplex = 0;
done:
;
}
}
ctl = 0;
if (lp->linkspeed == 100)
ctl |= MIICNTL_SPEED;
if (lp->fullduplex)
ctl |= MIICNTL_FDX;
tc_phy_write(dev, ctl, tr, 0, MII_CONTROL);
if (lp->fullduplex) {
tc_writel(tc_readl(&tr->MAC_Ctl) | MAC_FullDup, &tr->MAC_Ctl);
}
}
static void tc35815_chip_reset(struct net_device *dev)
{
struct tc35815_regs *tr = (struct tc35815_regs*)dev->base_addr;
/* reset the controller */
tc_writel(MAC_Reset, &tr->MAC_Ctl);
while (tc_readl(&tr->MAC_Ctl) & MAC_Reset)
;
tc_writel(0, &tr->MAC_Ctl);
/* initialize registers to default value */
tc_writel(0, &tr->DMA_Ctl);
tc_writel(0, &tr->TxThrsh);
tc_writel(0, &tr->TxPollCtr);
tc_writel(0, &tr->RxFragSize);
tc_writel(0, &tr->Int_En);
tc_writel(0, &tr->FDA_Bas);
tc_writel(0, &tr->FDA_Lim);
tc_writel(0xffffffff, &tr->Int_Src); /* Write 1 to clear */
tc_writel(0, &tr->CAM_Ctl);
tc_writel(0, &tr->Tx_Ctl);
tc_writel(0, &tr->Rx_Ctl);
tc_writel(0, &tr->CAM_Ena);
(void)tc_readl(&tr->Miss_Cnt); /* Read to clear */
}
static void tc35815_chip_init(struct net_device *dev)
{
struct tc35815_local *lp = dev->priv;
struct tc35815_regs *tr = (struct tc35815_regs*)dev->base_addr;
unsigned long flags;
unsigned long txctl = TX_CTL_CMD;
tc35815_phy_chip_init(dev);
/* load station address to CAM */
tc35815_set_cam_entry(tr, CAM_ENTRY_SOURCE, dev->dev_addr);
/* Enable CAM (broadcast and unicast) */
tc_writel(CAM_Ena_Bit(CAM_ENTRY_SOURCE), &tr->CAM_Ena);
tc_writel(CAM_CompEn | CAM_BroadAcc, &tr->CAM_Ctl);
spin_lock_irqsave(&lp->lock, flags);
tc_writel(DMA_BURST_SIZE, &tr->DMA_Ctl);
tc_writel(RxFrag_EnPack | ETH_ZLEN, &tr->RxFragSize); /* Packing */
tc_writel(0, &tr->TxPollCtr); /* Batch mode */
tc_writel(TX_THRESHOLD, &tr->TxThrsh);
tc_writel(INT_EN_CMD, &tr->Int_En);
/* set queues */
tc_writel(virt_to_bus(lp->rfd_base), &tr->FDA_Bas);
tc_writel((unsigned long)lp->rfd_limit - (unsigned long)lp->rfd_base,
&tr->FDA_Lim);
/*
* Activation method:
* First, enable eht MAC Transmitter and the DMA Receive circuits.
* Then enable the DMA Transmitter and the MAC Receive circuits.
*/
tc_writel(virt_to_bus(lp->fbl_ptr), &tr->BLFrmPtr); /* start DMA receiver */
tc_writel(RX_CTL_CMD, &tr->Rx_Ctl); /* start MAC receiver */
/* start MAC transmitter */
/* WORKAROUND: ignore LostCrS in full duplex operation */
if (lp->fullduplex)
txctl = TX_CTL_CMD & ~Tx_EnLCarr;
#ifdef GATHER_TXINT
txctl &= ~Tx_EnComp; /* disable global tx completion int. */
#endif
tc_writel(txctl, &tr->Tx_Ctl);
#if 0 /* No need to polling */
tc_writel(virt_to_bus(lp->tfd_base), &tr->TxFrmPtr); /* start DMA transmitter */
#endif
spin_unlock_irqrestore(&lp->lock, flags);
}
/* XXX */
void
tc35815_killall(void)
{
struct net_device *dev;
for (dev = root_tc35815_dev; dev; dev = ((struct tc35815_local *)dev->priv)->next_module) {
if (dev->flags&IFF_UP){
dev->stop(dev);
}
}
}
static struct pci_driver tc35815_driver = {
.name = TC35815_MODULE_NAME,
.probe = tc35815_probe,
.remove = NULL,
.id_table = tc35815_pci_tbl,
};
static int __init tc35815_init_module(void)
{
return pci_register_driver(&tc35815_driver);
}
static void __exit tc35815_cleanup_module(void)
{
struct net_device *next_dev;
while (root_tc35815_dev) {
struct net_device *dev = root_tc35815_dev;
next_dev = ((struct tc35815_local *)dev->priv)->next_module;
iounmap((void *)(dev->base_addr));
unregister_netdev(dev);
free_netdev(dev);
root_tc35815_dev = next_dev;
}
}
module_init(tc35815_init_module);
module_exit(tc35815_cleanup_module);
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