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1424 lines
38 KiB
1424 lines
38 KiB
/* lasi_82596.c -- driver for the intel 82596 ethernet controller, as |
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munged into HPPA boxen . |
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|
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This driver is based upon 82596.c, original credits are below... |
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but there were too many hoops which HP wants jumped through to |
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keep this code in there in a sane manner. |
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|
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3 primary sources of the mess -- |
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1) hppa needs *lots* of cacheline flushing to keep this kind of |
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MMIO running. |
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|
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2) The 82596 needs to see all of its pointers as their physical |
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address. Thus virt_to_bus/bus_to_virt are *everywhere*. |
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|
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3) The implementation HP is using seems to be significantly pickier |
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about when and how the command and RX units are started. some |
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command ordering was changed. |
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|
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Examination of the mach driver leads one to believe that there |
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might be a saner way to pull this off... anyone who feels like a |
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full rewrite can be my guest. |
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|
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Split 02/13/2000 Sam Creasey ([email protected]) |
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|
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02/01/2000 Initial modifications for parisc by Helge Deller ([email protected]) |
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03/02/2000 changes for better/correct(?) cache-flushing (deller) |
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*/ |
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|
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/* 82596.c: A generic 82596 ethernet driver for linux. */ |
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/* |
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Based on Apricot.c |
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Written 1994 by Mark Evans. |
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This driver is for the Apricot 82596 bus-master interface |
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|
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Modularised 12/94 Mark Evans |
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|
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Modified to support the 82596 ethernet chips on 680x0 VME boards. |
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by Richard Hirst <[email protected]> |
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Renamed to be 82596.c |
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|
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980825: Changed to receive directly in to sk_buffs which are |
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allocated at open() time. Eliminates copy on incoming frames |
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(small ones are still copied). Shared data now held in a |
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non-cached page, so we can run on 68060 in copyback mode. |
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|
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TBD: |
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* look at deferring rx frames rather than discarding (as per tulip) |
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* handle tx ring full as per tulip |
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* performance test to tune rx_copybreak |
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|
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Most of my modifications relate to the braindead big-endian |
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implementation by Intel. When the i596 is operating in |
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'big-endian' mode, it thinks a 32 bit value of 0x12345678 |
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should be stored as 0x56781234. This is a real pain, when |
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you have linked lists which are shared by the 680x0 and the |
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i596. |
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|
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Driver skeleton |
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Written 1993 by Donald Becker. |
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Copyright 1993 United States Government as represented by the Director, |
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National Security Agency. This software may only be used and distributed |
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according to the terms of the GNU General Public License as modified by SRC, |
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incorporated herein by reference. |
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|
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The author may be reached as [email protected], or C/O |
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Scyld Computing Corporation, 410 Severn Ave., Suite 210, Annapolis MD 21403 |
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|
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*/ |
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|
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#include <linux/module.h> |
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#include <linux/kernel.h> |
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#include <linux/string.h> |
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#include <linux/errno.h> |
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#include <linux/ioport.h> |
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#include <linux/interrupt.h> |
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#include <linux/delay.h> |
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#include <linux/netdevice.h> |
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#include <linux/etherdevice.h> |
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#include <linux/skbuff.h> |
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#include <linux/types.h> |
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#include <linux/bitops.h> |
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#include <linux/dma-mapping.h> |
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#include <linux/io.h> |
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#include <linux/irq.h> |
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#include <linux/gfp.h> |
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|
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/* DEBUG flags |
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*/ |
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|
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#define DEB_INIT 0x0001 |
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#define DEB_PROBE 0x0002 |
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#define DEB_SERIOUS 0x0004 |
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#define DEB_ERRORS 0x0008 |
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#define DEB_MULTI 0x0010 |
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#define DEB_TDR 0x0020 |
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#define DEB_OPEN 0x0040 |
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#define DEB_RESET 0x0080 |
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#define DEB_ADDCMD 0x0100 |
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#define DEB_STATUS 0x0200 |
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#define DEB_STARTTX 0x0400 |
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#define DEB_RXADDR 0x0800 |
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#define DEB_TXADDR 0x1000 |
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#define DEB_RXFRAME 0x2000 |
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#define DEB_INTS 0x4000 |
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#define DEB_STRUCT 0x8000 |
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#define DEB_ANY 0xffff |
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#define DEB(x, y) if (i596_debug & (x)) { y; } |
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|
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/* |
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* The MPU_PORT command allows direct access to the 82596. With PORT access |
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* the following commands are available (p5-18). The 32-bit port command |
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* must be word-swapped with the most significant word written first. |
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* This only applies to VME boards. |
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*/ |
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#define PORT_RESET 0x00 /* reset 82596 */ |
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#define PORT_SELFTEST 0x01 /* selftest */ |
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#define PORT_ALTSCP 0x02 /* alternate SCB address */ |
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#define PORT_ALTDUMP 0x03 /* Alternate DUMP address */ |
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|
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static int i596_debug = (DEB_SERIOUS|DEB_PROBE); |
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|
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/* Copy frames shorter than rx_copybreak, otherwise pass on up in |
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* a full sized sk_buff. Value of 100 stolen from tulip.c (!alpha). |
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*/ |
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static int rx_copybreak = 100; |
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|
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#define PKT_BUF_SZ 1536 |
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#define MAX_MC_CNT 64 |
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|
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#define ISCP_BUSY 0x0001 |
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|
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#define I596_NULL ((u32)0xffffffff) |
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|
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#define CMD_EOL 0x8000 /* The last command of the list, stop. */ |
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#define CMD_SUSP 0x4000 /* Suspend after doing cmd. */ |
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#define CMD_INTR 0x2000 /* Interrupt after doing cmd. */ |
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|
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#define CMD_FLEX 0x0008 /* Enable flexible memory model */ |
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|
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enum commands { |
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CmdNOp = 0, CmdSASetup = 1, CmdConfigure = 2, CmdMulticastList = 3, |
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CmdTx = 4, CmdTDR = 5, CmdDump = 6, CmdDiagnose = 7 |
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}; |
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|
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#define STAT_C 0x8000 /* Set to 0 after execution */ |
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#define STAT_B 0x4000 /* Command being executed */ |
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#define STAT_OK 0x2000 /* Command executed ok */ |
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#define STAT_A 0x1000 /* Command aborted */ |
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|
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#define CUC_START 0x0100 |
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#define CUC_RESUME 0x0200 |
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#define CUC_SUSPEND 0x0300 |
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#define CUC_ABORT 0x0400 |
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#define RX_START 0x0010 |
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#define RX_RESUME 0x0020 |
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#define RX_SUSPEND 0x0030 |
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#define RX_ABORT 0x0040 |
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|
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#define TX_TIMEOUT (HZ/20) |
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|
|
|
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struct i596_reg { |
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unsigned short porthi; |
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unsigned short portlo; |
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u32 ca; |
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}; |
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|
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#define EOF 0x8000 |
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#define SIZE_MASK 0x3fff |
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|
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struct i596_tbd { |
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unsigned short size; |
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unsigned short pad; |
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u32 next; |
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u32 data; |
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u32 cache_pad[5]; /* Total 32 bytes... */ |
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}; |
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|
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/* The command structure has two 'next' pointers; v_next is the address of |
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* the next command as seen by the CPU, b_next is the address of the next |
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* command as seen by the 82596. The b_next pointer, as used by the 82596 |
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* always references the status field of the next command, rather than the |
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* v_next field, because the 82596 is unaware of v_next. It may seem more |
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* logical to put v_next at the end of the structure, but we cannot do that |
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* because the 82596 expects other fields to be there, depending on command |
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* type. |
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*/ |
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|
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struct i596_cmd { |
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struct i596_cmd *v_next; /* Address from CPUs viewpoint */ |
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unsigned short status; |
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unsigned short command; |
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u32 b_next; /* Address from i596 viewpoint */ |
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}; |
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|
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struct tx_cmd { |
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struct i596_cmd cmd; |
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u32 tbd; |
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unsigned short size; |
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unsigned short pad; |
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struct sk_buff *skb; /* So we can free it after tx */ |
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dma_addr_t dma_addr; |
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#ifdef __LP64__ |
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u32 cache_pad[6]; /* Total 64 bytes... */ |
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#else |
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u32 cache_pad[1]; /* Total 32 bytes... */ |
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#endif |
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}; |
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|
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struct tdr_cmd { |
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struct i596_cmd cmd; |
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unsigned short status; |
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unsigned short pad; |
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}; |
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|
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struct mc_cmd { |
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struct i596_cmd cmd; |
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short mc_cnt; |
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char mc_addrs[MAX_MC_CNT*6]; |
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}; |
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|
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struct sa_cmd { |
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struct i596_cmd cmd; |
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char eth_addr[8]; |
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}; |
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|
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struct cf_cmd { |
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struct i596_cmd cmd; |
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char i596_config[16]; |
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}; |
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|
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struct i596_rfd { |
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unsigned short stat; |
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unsigned short cmd; |
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u32 b_next; /* Address from i596 viewpoint */ |
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u32 rbd; |
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unsigned short count; |
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unsigned short size; |
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struct i596_rfd *v_next; /* Address from CPUs viewpoint */ |
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struct i596_rfd *v_prev; |
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#ifndef __LP64__ |
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u32 cache_pad[2]; /* Total 32 bytes... */ |
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#endif |
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}; |
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|
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struct i596_rbd { |
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/* hardware data */ |
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unsigned short count; |
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unsigned short zero1; |
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u32 b_next; |
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u32 b_data; /* Address from i596 viewpoint */ |
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unsigned short size; |
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unsigned short zero2; |
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/* driver data */ |
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struct sk_buff *skb; |
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struct i596_rbd *v_next; |
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u32 b_addr; /* This rbd addr from i596 view */ |
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unsigned char *v_data; /* Address from CPUs viewpoint */ |
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/* Total 32 bytes... */ |
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#ifdef __LP64__ |
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u32 cache_pad[4]; |
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#endif |
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}; |
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|
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/* These values as chosen so struct i596_dma fits in one page... */ |
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|
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#define TX_RING_SIZE 32 |
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#define RX_RING_SIZE 16 |
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|
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struct i596_scb { |
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unsigned short status; |
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unsigned short command; |
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u32 cmd; |
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u32 rfd; |
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u32 crc_err; |
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u32 align_err; |
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u32 resource_err; |
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u32 over_err; |
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u32 rcvdt_err; |
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u32 short_err; |
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unsigned short t_on; |
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unsigned short t_off; |
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}; |
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|
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struct i596_iscp { |
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u32 stat; |
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u32 scb; |
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}; |
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|
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struct i596_scp { |
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u32 sysbus; |
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u32 pad; |
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u32 iscp; |
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}; |
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|
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struct i596_dma { |
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struct i596_scp scp __attribute__((aligned(32))); |
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volatile struct i596_iscp iscp __attribute__((aligned(32))); |
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volatile struct i596_scb scb __attribute__((aligned(32))); |
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struct sa_cmd sa_cmd __attribute__((aligned(32))); |
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struct cf_cmd cf_cmd __attribute__((aligned(32))); |
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struct tdr_cmd tdr_cmd __attribute__((aligned(32))); |
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struct mc_cmd mc_cmd __attribute__((aligned(32))); |
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struct i596_rfd rfds[RX_RING_SIZE] __attribute__((aligned(32))); |
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struct i596_rbd rbds[RX_RING_SIZE] __attribute__((aligned(32))); |
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struct tx_cmd tx_cmds[TX_RING_SIZE] __attribute__((aligned(32))); |
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struct i596_tbd tbds[TX_RING_SIZE] __attribute__((aligned(32))); |
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}; |
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struct i596_private { |
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struct i596_dma *dma; |
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u32 stat; |
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int last_restart; |
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struct i596_rfd *rfd_head; |
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struct i596_rbd *rbd_head; |
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struct i596_cmd *cmd_tail; |
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struct i596_cmd *cmd_head; |
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int cmd_backlog; |
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u32 last_cmd; |
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int next_tx_cmd; |
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int options; |
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spinlock_t lock; /* serialize access to chip */ |
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dma_addr_t dma_addr; |
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void __iomem *mpu_port; |
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void __iomem *ca; |
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}; |
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|
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static const char init_setup[] = |
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{ |
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0x8E, /* length, prefetch on */ |
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0xC8, /* fifo to 8, monitor off */ |
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0x80, /* don't save bad frames */ |
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0x2E, /* No source address insertion, 8 byte preamble */ |
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0x00, /* priority and backoff defaults */ |
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0x60, /* interframe spacing */ |
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0x00, /* slot time LSB */ |
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0xf2, /* slot time and retries */ |
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0x00, /* promiscuous mode */ |
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0x00, /* collision detect */ |
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0x40, /* minimum frame length */ |
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0xff, |
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0x00, |
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0x7f /* *multi IA */ }; |
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|
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static int i596_open(struct net_device *dev); |
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static netdev_tx_t i596_start_xmit(struct sk_buff *skb, struct net_device *dev); |
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static irqreturn_t i596_interrupt(int irq, void *dev_id); |
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static int i596_close(struct net_device *dev); |
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static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd); |
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static void i596_tx_timeout (struct net_device *dev, unsigned int txqueue); |
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static void print_eth(unsigned char *buf, char *str); |
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static void set_multicast_list(struct net_device *dev); |
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static inline void ca(struct net_device *dev); |
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static void mpu_port(struct net_device *dev, int c, dma_addr_t x); |
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|
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static int rx_ring_size = RX_RING_SIZE; |
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static int ticks_limit = 100; |
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static int max_cmd_backlog = TX_RING_SIZE-1; |
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|
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#ifdef CONFIG_NET_POLL_CONTROLLER |
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static void i596_poll_controller(struct net_device *dev); |
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#endif |
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|
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static inline dma_addr_t virt_to_dma(struct i596_private *lp, volatile void *v) |
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{ |
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return lp->dma_addr + ((unsigned long)v - (unsigned long)lp->dma); |
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} |
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|
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#ifdef NONCOHERENT_DMA |
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static inline void dma_sync_dev(struct net_device *ndev, volatile void *addr, |
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size_t len) |
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{ |
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dma_sync_single_for_device(ndev->dev.parent, |
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virt_to_dma(netdev_priv(ndev), addr), len, |
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DMA_BIDIRECTIONAL); |
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} |
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|
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static inline void dma_sync_cpu(struct net_device *ndev, volatile void *addr, |
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size_t len) |
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{ |
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dma_sync_single_for_cpu(ndev->dev.parent, |
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virt_to_dma(netdev_priv(ndev), addr), len, |
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DMA_BIDIRECTIONAL); |
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} |
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#else |
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static inline void dma_sync_dev(struct net_device *ndev, volatile void *addr, |
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size_t len) |
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{ |
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} |
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static inline void dma_sync_cpu(struct net_device *ndev, volatile void *addr, |
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size_t len) |
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{ |
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} |
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#endif /* NONCOHERENT_DMA */ |
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|
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static inline int wait_istat(struct net_device *dev, struct i596_dma *dma, int delcnt, char *str) |
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{ |
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dma_sync_cpu(dev, &(dma->iscp), sizeof(struct i596_iscp)); |
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while (--delcnt && dma->iscp.stat) { |
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udelay(10); |
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dma_sync_cpu(dev, &(dma->iscp), sizeof(struct i596_iscp)); |
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} |
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if (!delcnt) { |
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printk(KERN_ERR "%s: %s, iscp.stat %04x, didn't clear\n", |
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dev->name, str, SWAP16(dma->iscp.stat)); |
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return -1; |
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} else |
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return 0; |
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} |
|
|
|
|
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static inline int wait_cmd(struct net_device *dev, struct i596_dma *dma, int delcnt, char *str) |
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{ |
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dma_sync_cpu(dev, &(dma->scb), sizeof(struct i596_scb)); |
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while (--delcnt && dma->scb.command) { |
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udelay(10); |
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dma_sync_cpu(dev, &(dma->scb), sizeof(struct i596_scb)); |
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} |
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if (!delcnt) { |
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printk(KERN_ERR "%s: %s, status %4.4x, cmd %4.4x.\n", |
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dev->name, str, |
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SWAP16(dma->scb.status), |
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SWAP16(dma->scb.command)); |
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return -1; |
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} else |
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return 0; |
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} |
|
|
|
|
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static void i596_display_data(struct net_device *dev) |
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{ |
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struct i596_private *lp = netdev_priv(dev); |
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struct i596_dma *dma = lp->dma; |
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struct i596_cmd *cmd; |
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struct i596_rfd *rfd; |
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struct i596_rbd *rbd; |
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|
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printk(KERN_DEBUG "lp and scp at %p, .sysbus = %08x, .iscp = %08x\n", |
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&dma->scp, dma->scp.sysbus, SWAP32(dma->scp.iscp)); |
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printk(KERN_DEBUG "iscp at %p, iscp.stat = %08x, .scb = %08x\n", |
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&dma->iscp, SWAP32(dma->iscp.stat), SWAP32(dma->iscp.scb)); |
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printk(KERN_DEBUG "scb at %p, scb.status = %04x, .command = %04x," |
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" .cmd = %08x, .rfd = %08x\n", |
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&dma->scb, SWAP16(dma->scb.status), SWAP16(dma->scb.command), |
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SWAP16(dma->scb.cmd), SWAP32(dma->scb.rfd)); |
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printk(KERN_DEBUG " errors: crc %x, align %x, resource %x," |
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" over %x, rcvdt %x, short %x\n", |
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SWAP32(dma->scb.crc_err), SWAP32(dma->scb.align_err), |
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SWAP32(dma->scb.resource_err), SWAP32(dma->scb.over_err), |
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SWAP32(dma->scb.rcvdt_err), SWAP32(dma->scb.short_err)); |
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cmd = lp->cmd_head; |
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while (cmd != NULL) { |
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printk(KERN_DEBUG |
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"cmd at %p, .status = %04x, .command = %04x," |
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" .b_next = %08x\n", |
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cmd, SWAP16(cmd->status), SWAP16(cmd->command), |
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SWAP32(cmd->b_next)); |
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cmd = cmd->v_next; |
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} |
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rfd = lp->rfd_head; |
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printk(KERN_DEBUG "rfd_head = %p\n", rfd); |
|
do { |
|
printk(KERN_DEBUG |
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" %p .stat %04x, .cmd %04x, b_next %08x, rbd %08x," |
|
" count %04x\n", |
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rfd, SWAP16(rfd->stat), SWAP16(rfd->cmd), |
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SWAP32(rfd->b_next), SWAP32(rfd->rbd), |
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SWAP16(rfd->count)); |
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rfd = rfd->v_next; |
|
} while (rfd != lp->rfd_head); |
|
rbd = lp->rbd_head; |
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printk(KERN_DEBUG "rbd_head = %p\n", rbd); |
|
do { |
|
printk(KERN_DEBUG |
|
" %p .count %04x, b_next %08x, b_data %08x," |
|
" size %04x\n", |
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rbd, SWAP16(rbd->count), SWAP32(rbd->b_next), |
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SWAP32(rbd->b_data), SWAP16(rbd->size)); |
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rbd = rbd->v_next; |
|
} while (rbd != lp->rbd_head); |
|
dma_sync_cpu(dev, dma, sizeof(struct i596_dma)); |
|
} |
|
|
|
static inline int init_rx_bufs(struct net_device *dev) |
|
{ |
|
struct i596_private *lp = netdev_priv(dev); |
|
struct i596_dma *dma = lp->dma; |
|
int i; |
|
struct i596_rfd *rfd; |
|
struct i596_rbd *rbd; |
|
|
|
/* First build the Receive Buffer Descriptor List */ |
|
|
|
for (i = 0, rbd = dma->rbds; i < rx_ring_size; i++, rbd++) { |
|
dma_addr_t dma_addr; |
|
struct sk_buff *skb; |
|
|
|
skb = netdev_alloc_skb_ip_align(dev, PKT_BUF_SZ); |
|
if (skb == NULL) |
|
return -1; |
|
dma_addr = dma_map_single(dev->dev.parent, skb->data, |
|
PKT_BUF_SZ, DMA_FROM_DEVICE); |
|
rbd->v_next = rbd+1; |
|
rbd->b_next = SWAP32(virt_to_dma(lp, rbd+1)); |
|
rbd->b_addr = SWAP32(virt_to_dma(lp, rbd)); |
|
rbd->skb = skb; |
|
rbd->v_data = skb->data; |
|
rbd->b_data = SWAP32(dma_addr); |
|
rbd->size = SWAP16(PKT_BUF_SZ); |
|
} |
|
lp->rbd_head = dma->rbds; |
|
rbd = dma->rbds + rx_ring_size - 1; |
|
rbd->v_next = dma->rbds; |
|
rbd->b_next = SWAP32(virt_to_dma(lp, dma->rbds)); |
|
|
|
/* Now build the Receive Frame Descriptor List */ |
|
|
|
for (i = 0, rfd = dma->rfds; i < rx_ring_size; i++, rfd++) { |
|
rfd->rbd = I596_NULL; |
|
rfd->v_next = rfd+1; |
|
rfd->v_prev = rfd-1; |
|
rfd->b_next = SWAP32(virt_to_dma(lp, rfd+1)); |
|
rfd->cmd = SWAP16(CMD_FLEX); |
|
} |
|
lp->rfd_head = dma->rfds; |
|
dma->scb.rfd = SWAP32(virt_to_dma(lp, dma->rfds)); |
|
rfd = dma->rfds; |
|
rfd->rbd = SWAP32(virt_to_dma(lp, lp->rbd_head)); |
|
rfd->v_prev = dma->rfds + rx_ring_size - 1; |
|
rfd = dma->rfds + rx_ring_size - 1; |
|
rfd->v_next = dma->rfds; |
|
rfd->b_next = SWAP32(virt_to_dma(lp, dma->rfds)); |
|
rfd->cmd = SWAP16(CMD_EOL|CMD_FLEX); |
|
|
|
dma_sync_dev(dev, dma, sizeof(struct i596_dma)); |
|
return 0; |
|
} |
|
|
|
static inline void remove_rx_bufs(struct net_device *dev) |
|
{ |
|
struct i596_private *lp = netdev_priv(dev); |
|
struct i596_rbd *rbd; |
|
int i; |
|
|
|
for (i = 0, rbd = lp->dma->rbds; i < rx_ring_size; i++, rbd++) { |
|
if (rbd->skb == NULL) |
|
break; |
|
dma_unmap_single(dev->dev.parent, |
|
(dma_addr_t)SWAP32(rbd->b_data), |
|
PKT_BUF_SZ, DMA_FROM_DEVICE); |
|
dev_kfree_skb(rbd->skb); |
|
} |
|
} |
|
|
|
|
|
static void rebuild_rx_bufs(struct net_device *dev) |
|
{ |
|
struct i596_private *lp = netdev_priv(dev); |
|
struct i596_dma *dma = lp->dma; |
|
int i; |
|
|
|
/* Ensure rx frame/buffer descriptors are tidy */ |
|
|
|
for (i = 0; i < rx_ring_size; i++) { |
|
dma->rfds[i].rbd = I596_NULL; |
|
dma->rfds[i].cmd = SWAP16(CMD_FLEX); |
|
} |
|
dma->rfds[rx_ring_size-1].cmd = SWAP16(CMD_EOL|CMD_FLEX); |
|
lp->rfd_head = dma->rfds; |
|
dma->scb.rfd = SWAP32(virt_to_dma(lp, dma->rfds)); |
|
lp->rbd_head = dma->rbds; |
|
dma->rfds[0].rbd = SWAP32(virt_to_dma(lp, dma->rbds)); |
|
|
|
dma_sync_dev(dev, dma, sizeof(struct i596_dma)); |
|
} |
|
|
|
|
|
static int init_i596_mem(struct net_device *dev) |
|
{ |
|
struct i596_private *lp = netdev_priv(dev); |
|
struct i596_dma *dma = lp->dma; |
|
unsigned long flags; |
|
|
|
mpu_port(dev, PORT_RESET, 0); |
|
udelay(100); /* Wait 100us - seems to help */ |
|
|
|
/* change the scp address */ |
|
|
|
lp->last_cmd = jiffies; |
|
|
|
dma->scp.sysbus = SYSBUS; |
|
dma->scp.iscp = SWAP32(virt_to_dma(lp, &(dma->iscp))); |
|
dma->iscp.scb = SWAP32(virt_to_dma(lp, &(dma->scb))); |
|
dma->iscp.stat = SWAP32(ISCP_BUSY); |
|
lp->cmd_backlog = 0; |
|
|
|
lp->cmd_head = NULL; |
|
dma->scb.cmd = I596_NULL; |
|
|
|
DEB(DEB_INIT, printk(KERN_DEBUG "%s: starting i82596.\n", dev->name)); |
|
|
|
dma_sync_dev(dev, &(dma->scp), sizeof(struct i596_scp)); |
|
dma_sync_dev(dev, &(dma->iscp), sizeof(struct i596_iscp)); |
|
dma_sync_dev(dev, &(dma->scb), sizeof(struct i596_scb)); |
|
|
|
mpu_port(dev, PORT_ALTSCP, virt_to_dma(lp, &dma->scp)); |
|
ca(dev); |
|
if (wait_istat(dev, dma, 1000, "initialization timed out")) |
|
goto failed; |
|
DEB(DEB_INIT, printk(KERN_DEBUG |
|
"%s: i82596 initialization successful\n", |
|
dev->name)); |
|
|
|
if (request_irq(dev->irq, i596_interrupt, 0, "i82596", dev)) { |
|
printk(KERN_ERR "%s: IRQ %d not free\n", dev->name, dev->irq); |
|
goto failed; |
|
} |
|
|
|
/* Ensure rx frame/buffer descriptors are tidy */ |
|
rebuild_rx_bufs(dev); |
|
|
|
dma->scb.command = 0; |
|
dma_sync_dev(dev, &(dma->scb), sizeof(struct i596_scb)); |
|
|
|
DEB(DEB_INIT, printk(KERN_DEBUG |
|
"%s: queuing CmdConfigure\n", dev->name)); |
|
memcpy(dma->cf_cmd.i596_config, init_setup, 14); |
|
dma->cf_cmd.cmd.command = SWAP16(CmdConfigure); |
|
dma_sync_dev(dev, &(dma->cf_cmd), sizeof(struct cf_cmd)); |
|
i596_add_cmd(dev, &dma->cf_cmd.cmd); |
|
|
|
DEB(DEB_INIT, printk(KERN_DEBUG "%s: queuing CmdSASetup\n", dev->name)); |
|
memcpy(dma->sa_cmd.eth_addr, dev->dev_addr, ETH_ALEN); |
|
dma->sa_cmd.cmd.command = SWAP16(CmdSASetup); |
|
dma_sync_dev(dev, &(dma->sa_cmd), sizeof(struct sa_cmd)); |
|
i596_add_cmd(dev, &dma->sa_cmd.cmd); |
|
|
|
DEB(DEB_INIT, printk(KERN_DEBUG "%s: queuing CmdTDR\n", dev->name)); |
|
dma->tdr_cmd.cmd.command = SWAP16(CmdTDR); |
|
dma_sync_dev(dev, &(dma->tdr_cmd), sizeof(struct tdr_cmd)); |
|
i596_add_cmd(dev, &dma->tdr_cmd.cmd); |
|
|
|
spin_lock_irqsave (&lp->lock, flags); |
|
|
|
if (wait_cmd(dev, dma, 1000, "timed out waiting to issue RX_START")) { |
|
spin_unlock_irqrestore (&lp->lock, flags); |
|
goto failed_free_irq; |
|
} |
|
DEB(DEB_INIT, printk(KERN_DEBUG "%s: Issuing RX_START\n", dev->name)); |
|
dma->scb.command = SWAP16(RX_START); |
|
dma->scb.rfd = SWAP32(virt_to_dma(lp, dma->rfds)); |
|
dma_sync_dev(dev, &(dma->scb), sizeof(struct i596_scb)); |
|
|
|
ca(dev); |
|
|
|
spin_unlock_irqrestore (&lp->lock, flags); |
|
if (wait_cmd(dev, dma, 1000, "RX_START not processed")) |
|
goto failed_free_irq; |
|
DEB(DEB_INIT, printk(KERN_DEBUG |
|
"%s: Receive unit started OK\n", dev->name)); |
|
return 0; |
|
|
|
failed_free_irq: |
|
free_irq(dev->irq, dev); |
|
failed: |
|
printk(KERN_ERR "%s: Failed to initialise 82596\n", dev->name); |
|
mpu_port(dev, PORT_RESET, 0); |
|
return -1; |
|
} |
|
|
|
|
|
static inline int i596_rx(struct net_device *dev) |
|
{ |
|
struct i596_private *lp = netdev_priv(dev); |
|
struct i596_rfd *rfd; |
|
struct i596_rbd *rbd; |
|
int frames = 0; |
|
|
|
DEB(DEB_RXFRAME, printk(KERN_DEBUG |
|
"i596_rx(), rfd_head %p, rbd_head %p\n", |
|
lp->rfd_head, lp->rbd_head)); |
|
|
|
|
|
rfd = lp->rfd_head; /* Ref next frame to check */ |
|
|
|
dma_sync_cpu(dev, rfd, sizeof(struct i596_rfd)); |
|
while (rfd->stat & SWAP16(STAT_C)) { /* Loop while complete frames */ |
|
if (rfd->rbd == I596_NULL) |
|
rbd = NULL; |
|
else if (rfd->rbd == lp->rbd_head->b_addr) { |
|
rbd = lp->rbd_head; |
|
dma_sync_cpu(dev, rbd, sizeof(struct i596_rbd)); |
|
} else { |
|
printk(KERN_ERR "%s: rbd chain broken!\n", dev->name); |
|
/* XXX Now what? */ |
|
rbd = NULL; |
|
} |
|
DEB(DEB_RXFRAME, printk(KERN_DEBUG |
|
" rfd %p, rfd.rbd %08x, rfd.stat %04x\n", |
|
rfd, rfd->rbd, rfd->stat)); |
|
|
|
if (rbd != NULL && (rfd->stat & SWAP16(STAT_OK))) { |
|
/* a good frame */ |
|
int pkt_len = SWAP16(rbd->count) & 0x3fff; |
|
struct sk_buff *skb = rbd->skb; |
|
int rx_in_place = 0; |
|
|
|
DEB(DEB_RXADDR, print_eth(rbd->v_data, "received")); |
|
frames++; |
|
|
|
/* Check if the packet is long enough to just accept |
|
* without copying to a properly sized skbuff. |
|
*/ |
|
|
|
if (pkt_len > rx_copybreak) { |
|
struct sk_buff *newskb; |
|
dma_addr_t dma_addr; |
|
|
|
dma_unmap_single(dev->dev.parent, |
|
(dma_addr_t)SWAP32(rbd->b_data), |
|
PKT_BUF_SZ, DMA_FROM_DEVICE); |
|
/* Get fresh skbuff to replace filled one. */ |
|
newskb = netdev_alloc_skb_ip_align(dev, |
|
PKT_BUF_SZ); |
|
if (newskb == NULL) { |
|
skb = NULL; /* drop pkt */ |
|
goto memory_squeeze; |
|
} |
|
|
|
/* Pass up the skb already on the Rx ring. */ |
|
skb_put(skb, pkt_len); |
|
rx_in_place = 1; |
|
rbd->skb = newskb; |
|
dma_addr = dma_map_single(dev->dev.parent, |
|
newskb->data, |
|
PKT_BUF_SZ, |
|
DMA_FROM_DEVICE); |
|
rbd->v_data = newskb->data; |
|
rbd->b_data = SWAP32(dma_addr); |
|
dma_sync_dev(dev, rbd, sizeof(struct i596_rbd)); |
|
} else { |
|
skb = netdev_alloc_skb_ip_align(dev, pkt_len); |
|
} |
|
memory_squeeze: |
|
if (skb == NULL) { |
|
/* XXX tulip.c can defer packets here!! */ |
|
dev->stats.rx_dropped++; |
|
} else { |
|
if (!rx_in_place) { |
|
/* 16 byte align the data fields */ |
|
dma_sync_single_for_cpu(dev->dev.parent, |
|
(dma_addr_t)SWAP32(rbd->b_data), |
|
PKT_BUF_SZ, DMA_FROM_DEVICE); |
|
skb_put_data(skb, rbd->v_data, |
|
pkt_len); |
|
dma_sync_single_for_device(dev->dev.parent, |
|
(dma_addr_t)SWAP32(rbd->b_data), |
|
PKT_BUF_SZ, DMA_FROM_DEVICE); |
|
} |
|
skb->len = pkt_len; |
|
skb->protocol = eth_type_trans(skb, dev); |
|
netif_rx(skb); |
|
dev->stats.rx_packets++; |
|
dev->stats.rx_bytes += pkt_len; |
|
} |
|
} else { |
|
DEB(DEB_ERRORS, printk(KERN_DEBUG |
|
"%s: Error, rfd.stat = 0x%04x\n", |
|
dev->name, rfd->stat)); |
|
dev->stats.rx_errors++; |
|
if (rfd->stat & SWAP16(0x0100)) |
|
dev->stats.collisions++; |
|
if (rfd->stat & SWAP16(0x8000)) |
|
dev->stats.rx_length_errors++; |
|
if (rfd->stat & SWAP16(0x0001)) |
|
dev->stats.rx_over_errors++; |
|
if (rfd->stat & SWAP16(0x0002)) |
|
dev->stats.rx_fifo_errors++; |
|
if (rfd->stat & SWAP16(0x0004)) |
|
dev->stats.rx_frame_errors++; |
|
if (rfd->stat & SWAP16(0x0008)) |
|
dev->stats.rx_crc_errors++; |
|
if (rfd->stat & SWAP16(0x0010)) |
|
dev->stats.rx_length_errors++; |
|
} |
|
|
|
/* Clear the buffer descriptor count and EOF + F flags */ |
|
|
|
if (rbd != NULL && (rbd->count & SWAP16(0x4000))) { |
|
rbd->count = 0; |
|
lp->rbd_head = rbd->v_next; |
|
dma_sync_dev(dev, rbd, sizeof(struct i596_rbd)); |
|
} |
|
|
|
/* Tidy the frame descriptor, marking it as end of list */ |
|
|
|
rfd->rbd = I596_NULL; |
|
rfd->stat = 0; |
|
rfd->cmd = SWAP16(CMD_EOL|CMD_FLEX); |
|
rfd->count = 0; |
|
|
|
/* Update record of next frame descriptor to process */ |
|
|
|
lp->dma->scb.rfd = rfd->b_next; |
|
lp->rfd_head = rfd->v_next; |
|
dma_sync_dev(dev, rfd, sizeof(struct i596_rfd)); |
|
|
|
/* Remove end-of-list from old end descriptor */ |
|
|
|
rfd->v_prev->cmd = SWAP16(CMD_FLEX); |
|
dma_sync_dev(dev, rfd->v_prev, sizeof(struct i596_rfd)); |
|
rfd = lp->rfd_head; |
|
dma_sync_cpu(dev, rfd, sizeof(struct i596_rfd)); |
|
} |
|
|
|
DEB(DEB_RXFRAME, printk(KERN_DEBUG "frames %d\n", frames)); |
|
|
|
return 0; |
|
} |
|
|
|
|
|
static inline void i596_cleanup_cmd(struct net_device *dev, struct i596_private *lp) |
|
{ |
|
struct i596_cmd *ptr; |
|
|
|
while (lp->cmd_head != NULL) { |
|
ptr = lp->cmd_head; |
|
lp->cmd_head = ptr->v_next; |
|
lp->cmd_backlog--; |
|
|
|
switch (SWAP16(ptr->command) & 0x7) { |
|
case CmdTx: |
|
{ |
|
struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr; |
|
struct sk_buff *skb = tx_cmd->skb; |
|
dma_unmap_single(dev->dev.parent, |
|
tx_cmd->dma_addr, |
|
skb->len, DMA_TO_DEVICE); |
|
|
|
dev_kfree_skb(skb); |
|
|
|
dev->stats.tx_errors++; |
|
dev->stats.tx_aborted_errors++; |
|
|
|
ptr->v_next = NULL; |
|
ptr->b_next = I596_NULL; |
|
tx_cmd->cmd.command = 0; /* Mark as free */ |
|
break; |
|
} |
|
default: |
|
ptr->v_next = NULL; |
|
ptr->b_next = I596_NULL; |
|
} |
|
dma_sync_dev(dev, ptr, sizeof(struct i596_cmd)); |
|
} |
|
|
|
wait_cmd(dev, lp->dma, 100, "i596_cleanup_cmd timed out"); |
|
lp->dma->scb.cmd = I596_NULL; |
|
dma_sync_dev(dev, &(lp->dma->scb), sizeof(struct i596_scb)); |
|
} |
|
|
|
|
|
static inline void i596_reset(struct net_device *dev, struct i596_private *lp) |
|
{ |
|
unsigned long flags; |
|
|
|
DEB(DEB_RESET, printk(KERN_DEBUG "i596_reset\n")); |
|
|
|
spin_lock_irqsave (&lp->lock, flags); |
|
|
|
wait_cmd(dev, lp->dma, 100, "i596_reset timed out"); |
|
|
|
netif_stop_queue(dev); |
|
|
|
/* FIXME: this command might cause an lpmc */ |
|
lp->dma->scb.command = SWAP16(CUC_ABORT | RX_ABORT); |
|
dma_sync_dev(dev, &(lp->dma->scb), sizeof(struct i596_scb)); |
|
ca(dev); |
|
|
|
/* wait for shutdown */ |
|
wait_cmd(dev, lp->dma, 1000, "i596_reset 2 timed out"); |
|
spin_unlock_irqrestore (&lp->lock, flags); |
|
|
|
i596_cleanup_cmd(dev, lp); |
|
i596_rx(dev); |
|
|
|
netif_start_queue(dev); |
|
init_i596_mem(dev); |
|
} |
|
|
|
|
|
static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd) |
|
{ |
|
struct i596_private *lp = netdev_priv(dev); |
|
struct i596_dma *dma = lp->dma; |
|
unsigned long flags; |
|
|
|
DEB(DEB_ADDCMD, printk(KERN_DEBUG "i596_add_cmd cmd_head %p\n", |
|
lp->cmd_head)); |
|
|
|
cmd->status = 0; |
|
cmd->command |= SWAP16(CMD_EOL | CMD_INTR); |
|
cmd->v_next = NULL; |
|
cmd->b_next = I596_NULL; |
|
dma_sync_dev(dev, cmd, sizeof(struct i596_cmd)); |
|
|
|
spin_lock_irqsave (&lp->lock, flags); |
|
|
|
if (lp->cmd_head != NULL) { |
|
lp->cmd_tail->v_next = cmd; |
|
lp->cmd_tail->b_next = SWAP32(virt_to_dma(lp, &cmd->status)); |
|
dma_sync_dev(dev, lp->cmd_tail, sizeof(struct i596_cmd)); |
|
} else { |
|
lp->cmd_head = cmd; |
|
wait_cmd(dev, dma, 100, "i596_add_cmd timed out"); |
|
dma->scb.cmd = SWAP32(virt_to_dma(lp, &cmd->status)); |
|
dma->scb.command = SWAP16(CUC_START); |
|
dma_sync_dev(dev, &(dma->scb), sizeof(struct i596_scb)); |
|
ca(dev); |
|
} |
|
lp->cmd_tail = cmd; |
|
lp->cmd_backlog++; |
|
|
|
spin_unlock_irqrestore (&lp->lock, flags); |
|
|
|
if (lp->cmd_backlog > max_cmd_backlog) { |
|
unsigned long tickssofar = jiffies - lp->last_cmd; |
|
|
|
if (tickssofar < ticks_limit) |
|
return; |
|
|
|
printk(KERN_ERR |
|
"%s: command unit timed out, status resetting.\n", |
|
dev->name); |
|
#if 1 |
|
i596_reset(dev, lp); |
|
#endif |
|
} |
|
} |
|
|
|
static int i596_open(struct net_device *dev) |
|
{ |
|
DEB(DEB_OPEN, printk(KERN_DEBUG |
|
"%s: i596_open() irq %d.\n", dev->name, dev->irq)); |
|
|
|
if (init_rx_bufs(dev)) { |
|
printk(KERN_ERR "%s: Failed to init rx bufs\n", dev->name); |
|
return -EAGAIN; |
|
} |
|
if (init_i596_mem(dev)) { |
|
printk(KERN_ERR "%s: Failed to init memory\n", dev->name); |
|
goto out_remove_rx_bufs; |
|
} |
|
netif_start_queue(dev); |
|
|
|
return 0; |
|
|
|
out_remove_rx_bufs: |
|
remove_rx_bufs(dev); |
|
return -EAGAIN; |
|
} |
|
|
|
static void i596_tx_timeout (struct net_device *dev, unsigned int txqueue) |
|
{ |
|
struct i596_private *lp = netdev_priv(dev); |
|
|
|
/* Transmitter timeout, serious problems. */ |
|
DEB(DEB_ERRORS, printk(KERN_DEBUG |
|
"%s: transmit timed out, status resetting.\n", |
|
dev->name)); |
|
|
|
dev->stats.tx_errors++; |
|
|
|
/* Try to restart the adaptor */ |
|
if (lp->last_restart == dev->stats.tx_packets) { |
|
DEB(DEB_ERRORS, printk(KERN_DEBUG "Resetting board.\n")); |
|
/* Shutdown and restart */ |
|
i596_reset (dev, lp); |
|
} else { |
|
/* Issue a channel attention signal */ |
|
DEB(DEB_ERRORS, printk(KERN_DEBUG "Kicking board.\n")); |
|
lp->dma->scb.command = SWAP16(CUC_START | RX_START); |
|
dma_sync_dev(dev, &(lp->dma->scb), sizeof(struct i596_scb)); |
|
ca (dev); |
|
lp->last_restart = dev->stats.tx_packets; |
|
} |
|
|
|
netif_trans_update(dev); /* prevent tx timeout */ |
|
netif_wake_queue (dev); |
|
} |
|
|
|
|
|
static netdev_tx_t i596_start_xmit(struct sk_buff *skb, struct net_device *dev) |
|
{ |
|
struct i596_private *lp = netdev_priv(dev); |
|
struct tx_cmd *tx_cmd; |
|
struct i596_tbd *tbd; |
|
short length = skb->len; |
|
|
|
DEB(DEB_STARTTX, printk(KERN_DEBUG |
|
"%s: i596_start_xmit(%x,%p) called\n", |
|
dev->name, skb->len, skb->data)); |
|
|
|
if (length < ETH_ZLEN) { |
|
if (skb_padto(skb, ETH_ZLEN)) |
|
return NETDEV_TX_OK; |
|
length = ETH_ZLEN; |
|
} |
|
|
|
netif_stop_queue(dev); |
|
|
|
tx_cmd = lp->dma->tx_cmds + lp->next_tx_cmd; |
|
tbd = lp->dma->tbds + lp->next_tx_cmd; |
|
|
|
if (tx_cmd->cmd.command) { |
|
DEB(DEB_ERRORS, printk(KERN_DEBUG |
|
"%s: xmit ring full, dropping packet.\n", |
|
dev->name)); |
|
dev->stats.tx_dropped++; |
|
|
|
dev_kfree_skb_any(skb); |
|
} else { |
|
if (++lp->next_tx_cmd == TX_RING_SIZE) |
|
lp->next_tx_cmd = 0; |
|
tx_cmd->tbd = SWAP32(virt_to_dma(lp, tbd)); |
|
tbd->next = I596_NULL; |
|
|
|
tx_cmd->cmd.command = SWAP16(CMD_FLEX | CmdTx); |
|
tx_cmd->skb = skb; |
|
|
|
tx_cmd->pad = 0; |
|
tx_cmd->size = 0; |
|
tbd->pad = 0; |
|
tbd->size = SWAP16(EOF | length); |
|
|
|
tx_cmd->dma_addr = dma_map_single(dev->dev.parent, skb->data, |
|
skb->len, DMA_TO_DEVICE); |
|
tbd->data = SWAP32(tx_cmd->dma_addr); |
|
|
|
DEB(DEB_TXADDR, print_eth(skb->data, "tx-queued")); |
|
dma_sync_dev(dev, tx_cmd, sizeof(struct tx_cmd)); |
|
dma_sync_dev(dev, tbd, sizeof(struct i596_tbd)); |
|
i596_add_cmd(dev, &tx_cmd->cmd); |
|
|
|
dev->stats.tx_packets++; |
|
dev->stats.tx_bytes += length; |
|
} |
|
|
|
netif_start_queue(dev); |
|
|
|
return NETDEV_TX_OK; |
|
} |
|
|
|
static void print_eth(unsigned char *add, char *str) |
|
{ |
|
printk(KERN_DEBUG "i596 0x%p, %pM --> %pM %02X%02X, %s\n", |
|
add, add + 6, add, add[12], add[13], str); |
|
} |
|
static const struct net_device_ops i596_netdev_ops = { |
|
.ndo_open = i596_open, |
|
.ndo_stop = i596_close, |
|
.ndo_start_xmit = i596_start_xmit, |
|
.ndo_set_rx_mode = set_multicast_list, |
|
.ndo_tx_timeout = i596_tx_timeout, |
|
.ndo_validate_addr = eth_validate_addr, |
|
.ndo_set_mac_address = eth_mac_addr, |
|
#ifdef CONFIG_NET_POLL_CONTROLLER |
|
.ndo_poll_controller = i596_poll_controller, |
|
#endif |
|
}; |
|
|
|
static int i82596_probe(struct net_device *dev) |
|
{ |
|
struct i596_private *lp = netdev_priv(dev); |
|
int ret; |
|
|
|
/* This lot is ensure things have been cache line aligned. */ |
|
BUILD_BUG_ON(sizeof(struct i596_rfd) != 32); |
|
BUILD_BUG_ON(sizeof(struct i596_rbd) & 31); |
|
BUILD_BUG_ON(sizeof(struct tx_cmd) & 31); |
|
BUILD_BUG_ON(sizeof(struct i596_tbd) != 32); |
|
#ifndef __LP64__ |
|
BUILD_BUG_ON(sizeof(struct i596_dma) > 4096); |
|
#endif |
|
|
|
if (!dev->base_addr || !dev->irq) |
|
return -ENODEV; |
|
|
|
dev->netdev_ops = &i596_netdev_ops; |
|
dev->watchdog_timeo = TX_TIMEOUT; |
|
|
|
memset(lp->dma, 0, sizeof(struct i596_dma)); |
|
lp->dma->scb.command = 0; |
|
lp->dma->scb.cmd = I596_NULL; |
|
lp->dma->scb.rfd = I596_NULL; |
|
spin_lock_init(&lp->lock); |
|
|
|
dma_sync_dev(dev, lp->dma, sizeof(struct i596_dma)); |
|
|
|
ret = register_netdev(dev); |
|
if (ret) |
|
return ret; |
|
|
|
DEB(DEB_PROBE, printk(KERN_INFO "%s: 82596 at %#3lx, %pM IRQ %d.\n", |
|
dev->name, dev->base_addr, dev->dev_addr, |
|
dev->irq)); |
|
DEB(DEB_INIT, printk(KERN_INFO |
|
"%s: dma at 0x%p (%d bytes), lp->scb at 0x%p\n", |
|
dev->name, lp->dma, (int)sizeof(struct i596_dma), |
|
&lp->dma->scb)); |
|
|
|
return 0; |
|
} |
|
|
|
#ifdef CONFIG_NET_POLL_CONTROLLER |
|
static void i596_poll_controller(struct net_device *dev) |
|
{ |
|
disable_irq(dev->irq); |
|
i596_interrupt(dev->irq, dev); |
|
enable_irq(dev->irq); |
|
} |
|
#endif |
|
|
|
static irqreturn_t i596_interrupt(int irq, void *dev_id) |
|
{ |
|
struct net_device *dev = dev_id; |
|
struct i596_private *lp; |
|
struct i596_dma *dma; |
|
unsigned short status, ack_cmd = 0; |
|
|
|
lp = netdev_priv(dev); |
|
dma = lp->dma; |
|
|
|
spin_lock (&lp->lock); |
|
|
|
wait_cmd(dev, dma, 100, "i596 interrupt, timeout"); |
|
status = SWAP16(dma->scb.status); |
|
|
|
DEB(DEB_INTS, printk(KERN_DEBUG |
|
"%s: i596 interrupt, IRQ %d, status %4.4x.\n", |
|
dev->name, dev->irq, status)); |
|
|
|
ack_cmd = status & 0xf000; |
|
|
|
if (!ack_cmd) { |
|
DEB(DEB_ERRORS, printk(KERN_DEBUG |
|
"%s: interrupt with no events\n", |
|
dev->name)); |
|
spin_unlock (&lp->lock); |
|
return IRQ_NONE; |
|
} |
|
|
|
if ((status & 0x8000) || (status & 0x2000)) { |
|
struct i596_cmd *ptr; |
|
|
|
if ((status & 0x8000)) |
|
DEB(DEB_INTS, |
|
printk(KERN_DEBUG |
|
"%s: i596 interrupt completed command.\n", |
|
dev->name)); |
|
if ((status & 0x2000)) |
|
DEB(DEB_INTS, |
|
printk(KERN_DEBUG |
|
"%s: i596 interrupt command unit inactive %x.\n", |
|
dev->name, status & 0x0700)); |
|
|
|
while (lp->cmd_head != NULL) { |
|
dma_sync_cpu(dev, lp->cmd_head, sizeof(struct i596_cmd)); |
|
if (!(lp->cmd_head->status & SWAP16(STAT_C))) |
|
break; |
|
|
|
ptr = lp->cmd_head; |
|
|
|
DEB(DEB_STATUS, |
|
printk(KERN_DEBUG |
|
"cmd_head->status = %04x, ->command = %04x\n", |
|
SWAP16(lp->cmd_head->status), |
|
SWAP16(lp->cmd_head->command))); |
|
lp->cmd_head = ptr->v_next; |
|
lp->cmd_backlog--; |
|
|
|
switch (SWAP16(ptr->command) & 0x7) { |
|
case CmdTx: |
|
{ |
|
struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr; |
|
struct sk_buff *skb = tx_cmd->skb; |
|
|
|
if (ptr->status & SWAP16(STAT_OK)) { |
|
DEB(DEB_TXADDR, |
|
print_eth(skb->data, "tx-done")); |
|
} else { |
|
dev->stats.tx_errors++; |
|
if (ptr->status & SWAP16(0x0020)) |
|
dev->stats.collisions++; |
|
if (!(ptr->status & SWAP16(0x0040))) |
|
dev->stats.tx_heartbeat_errors++; |
|
if (ptr->status & SWAP16(0x0400)) |
|
dev->stats.tx_carrier_errors++; |
|
if (ptr->status & SWAP16(0x0800)) |
|
dev->stats.collisions++; |
|
if (ptr->status & SWAP16(0x1000)) |
|
dev->stats.tx_aborted_errors++; |
|
} |
|
dma_unmap_single(dev->dev.parent, |
|
tx_cmd->dma_addr, |
|
skb->len, DMA_TO_DEVICE); |
|
dev_consume_skb_irq(skb); |
|
|
|
tx_cmd->cmd.command = 0; /* Mark free */ |
|
break; |
|
} |
|
case CmdTDR: |
|
{ |
|
unsigned short status = SWAP16(((struct tdr_cmd *)ptr)->status); |
|
|
|
if (status & 0x8000) { |
|
DEB(DEB_ANY, |
|
printk(KERN_DEBUG "%s: link ok.\n", |
|
dev->name)); |
|
} else { |
|
if (status & 0x4000) |
|
printk(KERN_ERR |
|
"%s: Transceiver problem.\n", |
|
dev->name); |
|
if (status & 0x2000) |
|
printk(KERN_ERR |
|
"%s: Termination problem.\n", |
|
dev->name); |
|
if (status & 0x1000) |
|
printk(KERN_ERR |
|
"%s: Short circuit.\n", |
|
dev->name); |
|
|
|
DEB(DEB_TDR, |
|
printk(KERN_DEBUG "%s: Time %d.\n", |
|
dev->name, status & 0x07ff)); |
|
} |
|
break; |
|
} |
|
case CmdConfigure: |
|
/* |
|
* Zap command so set_multicast_list() know |
|
* it is free |
|
*/ |
|
ptr->command = 0; |
|
break; |
|
} |
|
ptr->v_next = NULL; |
|
ptr->b_next = I596_NULL; |
|
dma_sync_dev(dev, ptr, sizeof(struct i596_cmd)); |
|
lp->last_cmd = jiffies; |
|
} |
|
|
|
/* This mess is arranging that only the last of any outstanding |
|
* commands has the interrupt bit set. Should probably really |
|
* only add to the cmd queue when the CU is stopped. |
|
*/ |
|
ptr = lp->cmd_head; |
|
while ((ptr != NULL) && (ptr != lp->cmd_tail)) { |
|
struct i596_cmd *prev = ptr; |
|
|
|
ptr->command &= SWAP16(0x1fff); |
|
ptr = ptr->v_next; |
|
dma_sync_dev(dev, prev, sizeof(struct i596_cmd)); |
|
} |
|
|
|
if (lp->cmd_head != NULL) |
|
ack_cmd |= CUC_START; |
|
dma->scb.cmd = SWAP32(virt_to_dma(lp, &lp->cmd_head->status)); |
|
dma_sync_dev(dev, &dma->scb, sizeof(struct i596_scb)); |
|
} |
|
if ((status & 0x1000) || (status & 0x4000)) { |
|
if ((status & 0x4000)) |
|
DEB(DEB_INTS, |
|
printk(KERN_DEBUG |
|
"%s: i596 interrupt received a frame.\n", |
|
dev->name)); |
|
i596_rx(dev); |
|
/* Only RX_START if stopped - RGH 07-07-96 */ |
|
if (status & 0x1000) { |
|
if (netif_running(dev)) { |
|
DEB(DEB_ERRORS, |
|
printk(KERN_DEBUG |
|
"%s: i596 interrupt receive unit inactive, status 0x%x\n", |
|
dev->name, status)); |
|
ack_cmd |= RX_START; |
|
dev->stats.rx_errors++; |
|
dev->stats.rx_fifo_errors++; |
|
rebuild_rx_bufs(dev); |
|
} |
|
} |
|
} |
|
wait_cmd(dev, dma, 100, "i596 interrupt, timeout"); |
|
dma->scb.command = SWAP16(ack_cmd); |
|
dma_sync_dev(dev, &dma->scb, sizeof(struct i596_scb)); |
|
|
|
/* DANGER: I suspect that some kind of interrupt |
|
acknowledgement aside from acking the 82596 might be needed |
|
here... but it's running acceptably without */ |
|
|
|
ca(dev); |
|
|
|
wait_cmd(dev, dma, 100, "i596 interrupt, exit timeout"); |
|
DEB(DEB_INTS, printk(KERN_DEBUG "%s: exiting interrupt.\n", dev->name)); |
|
|
|
spin_unlock (&lp->lock); |
|
return IRQ_HANDLED; |
|
} |
|
|
|
static int i596_close(struct net_device *dev) |
|
{ |
|
struct i596_private *lp = netdev_priv(dev); |
|
unsigned long flags; |
|
|
|
netif_stop_queue(dev); |
|
|
|
DEB(DEB_INIT, |
|
printk(KERN_DEBUG |
|
"%s: Shutting down ethercard, status was %4.4x.\n", |
|
dev->name, SWAP16(lp->dma->scb.status))); |
|
|
|
spin_lock_irqsave(&lp->lock, flags); |
|
|
|
wait_cmd(dev, lp->dma, 100, "close1 timed out"); |
|
lp->dma->scb.command = SWAP16(CUC_ABORT | RX_ABORT); |
|
dma_sync_dev(dev, &lp->dma->scb, sizeof(struct i596_scb)); |
|
|
|
ca(dev); |
|
|
|
wait_cmd(dev, lp->dma, 100, "close2 timed out"); |
|
spin_unlock_irqrestore(&lp->lock, flags); |
|
DEB(DEB_STRUCT, i596_display_data(dev)); |
|
i596_cleanup_cmd(dev, lp); |
|
|
|
free_irq(dev->irq, dev); |
|
remove_rx_bufs(dev); |
|
|
|
return 0; |
|
} |
|
|
|
/* |
|
* Set or clear the multicast filter for this adaptor. |
|
*/ |
|
|
|
static void set_multicast_list(struct net_device *dev) |
|
{ |
|
struct i596_private *lp = netdev_priv(dev); |
|
struct i596_dma *dma = lp->dma; |
|
int config = 0, cnt; |
|
|
|
DEB(DEB_MULTI, |
|
printk(KERN_DEBUG |
|
"%s: set multicast list, %d entries, promisc %s, allmulti %s\n", |
|
dev->name, netdev_mc_count(dev), |
|
dev->flags & IFF_PROMISC ? "ON" : "OFF", |
|
dev->flags & IFF_ALLMULTI ? "ON" : "OFF")); |
|
|
|
if ((dev->flags & IFF_PROMISC) && |
|
!(dma->cf_cmd.i596_config[8] & 0x01)) { |
|
dma->cf_cmd.i596_config[8] |= 0x01; |
|
config = 1; |
|
} |
|
if (!(dev->flags & IFF_PROMISC) && |
|
(dma->cf_cmd.i596_config[8] & 0x01)) { |
|
dma->cf_cmd.i596_config[8] &= ~0x01; |
|
config = 1; |
|
} |
|
if ((dev->flags & IFF_ALLMULTI) && |
|
(dma->cf_cmd.i596_config[11] & 0x20)) { |
|
dma->cf_cmd.i596_config[11] &= ~0x20; |
|
config = 1; |
|
} |
|
if (!(dev->flags & IFF_ALLMULTI) && |
|
!(dma->cf_cmd.i596_config[11] & 0x20)) { |
|
dma->cf_cmd.i596_config[11] |= 0x20; |
|
config = 1; |
|
} |
|
if (config) { |
|
if (dma->cf_cmd.cmd.command) |
|
printk(KERN_INFO |
|
"%s: config change request already queued\n", |
|
dev->name); |
|
else { |
|
dma->cf_cmd.cmd.command = SWAP16(CmdConfigure); |
|
dma_sync_dev(dev, &dma->cf_cmd, sizeof(struct cf_cmd)); |
|
i596_add_cmd(dev, &dma->cf_cmd.cmd); |
|
} |
|
} |
|
|
|
cnt = netdev_mc_count(dev); |
|
if (cnt > MAX_MC_CNT) { |
|
cnt = MAX_MC_CNT; |
|
printk(KERN_NOTICE "%s: Only %d multicast addresses supported", |
|
dev->name, cnt); |
|
} |
|
|
|
if (!netdev_mc_empty(dev)) { |
|
struct netdev_hw_addr *ha; |
|
unsigned char *cp; |
|
struct mc_cmd *cmd; |
|
|
|
cmd = &dma->mc_cmd; |
|
cmd->cmd.command = SWAP16(CmdMulticastList); |
|
cmd->mc_cnt = SWAP16(netdev_mc_count(dev) * 6); |
|
cp = cmd->mc_addrs; |
|
netdev_for_each_mc_addr(ha, dev) { |
|
if (!cnt--) |
|
break; |
|
memcpy(cp, ha->addr, ETH_ALEN); |
|
if (i596_debug > 1) |
|
DEB(DEB_MULTI, |
|
printk(KERN_DEBUG |
|
"%s: Adding address %pM\n", |
|
dev->name, cp)); |
|
cp += ETH_ALEN; |
|
} |
|
dma_sync_dev(dev, &dma->mc_cmd, sizeof(struct mc_cmd)); |
|
i596_add_cmd(dev, &cmd->cmd); |
|
} |
|
}
|
|
|