![David S. Miller](/assets/img/avatar_default.png)
It hasn't "summed" anything in over 7 years, and it's just a straight mempcy ala skb_copy_to_linear_data() so just get rid of it. Signed-off-by: David S. Miller <davem@davemloft.net>
1300 lines
40 KiB
C
1300 lines
40 KiB
C
/* lance.c: An AMD LANCE/PCnet ethernet driver for Linux. */
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/*
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Written/copyright 1993-1998 by Donald Becker.
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Copyright 1993 United States Government as represented by the
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Director, National Security Agency.
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This software may be used and distributed according to the terms
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of the GNU General Public License, incorporated herein by reference.
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This driver is for the Allied Telesis AT1500 and HP J2405A, and should work
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with most other LANCE-based bus-master (NE2100/NE2500) ethercards.
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The author may be reached as becker@scyld.com, or C/O
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Scyld Computing Corporation
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410 Severn Ave., Suite 210
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Annapolis MD 21403
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Andrey V. Savochkin:
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- alignment problem with 1.3.* kernel and some minor changes.
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Thomas Bogendoerfer (tsbogend@bigbug.franken.de):
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- added support for Linux/Alpha, but removed most of it, because
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it worked only for the PCI chip.
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- added hook for the 32bit lance driver
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- added PCnetPCI II (79C970A) to chip table
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Paul Gortmaker (gpg109@rsphy1.anu.edu.au):
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- hopefully fix above so Linux/Alpha can use ISA cards too.
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8/20/96 Fixed 7990 autoIRQ failure and reversed unneeded alignment -djb
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v1.12 10/27/97 Module support -djb
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v1.14 2/3/98 Module support modified, made PCI support optional -djb
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v1.15 5/27/99 Fixed bug in the cleanup_module(). dev->priv was freed
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before unregister_netdev() which caused NULL pointer
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reference later in the chain (in rtnetlink_fill_ifinfo())
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-- Mika Kuoppala <miku@iki.fi>
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Forward ported v1.14 to 2.1.129, merged the PCI and misc changes from
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the 2.1 version of the old driver - Alan Cox
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Get rid of check_region, check kmalloc return in lance_probe1
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Arnaldo Carvalho de Melo <acme@conectiva.com.br> - 11/01/2001
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Reworked detection, added support for Racal InterLan EtherBlaster cards
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Vesselin Kostadinov <vesok at yahoo dot com > - 22/4/2004
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*/
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static const char version[] = "lance.c:v1.16 2006/11/09 dplatt@3do.com, becker@cesdis.gsfc.nasa.gov\n";
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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/delay.h>
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#include <linux/errno.h>
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#include <linux/ioport.h>
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#include <linux/slab.h>
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#include <linux/interrupt.h>
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#include <linux/pci.h>
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#include <linux/init.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/mm.h>
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#include <linux/bitops.h>
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#include <asm/io.h>
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#include <asm/dma.h>
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static unsigned int lance_portlist[] __initdata = { 0x300, 0x320, 0x340, 0x360, 0};
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static int lance_probe1(struct net_device *dev, int ioaddr, int irq, int options);
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static int __init do_lance_probe(struct net_device *dev);
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static struct card {
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char id_offset14;
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char id_offset15;
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} cards[] = {
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{ //"normal"
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.id_offset14 = 0x57,
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.id_offset15 = 0x57,
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},
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{ //NI6510EB
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.id_offset14 = 0x52,
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.id_offset15 = 0x44,
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},
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{ //Racal InterLan EtherBlaster
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.id_offset14 = 0x52,
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.id_offset15 = 0x49,
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},
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};
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#define NUM_CARDS 3
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#ifdef LANCE_DEBUG
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static int lance_debug = LANCE_DEBUG;
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#else
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static int lance_debug = 1;
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#endif
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/*
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Theory of Operation
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I. Board Compatibility
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This device driver is designed for the AMD 79C960, the "PCnet-ISA
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single-chip ethernet controller for ISA". This chip is used in a wide
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variety of boards from vendors such as Allied Telesis, HP, Kingston,
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and Boca. This driver is also intended to work with older AMD 7990
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designs, such as the NE1500 and NE2100, and newer 79C961. For convenience,
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I use the name LANCE to refer to all of the AMD chips, even though it properly
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refers only to the original 7990.
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II. Board-specific settings
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The driver is designed to work the boards that use the faster
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bus-master mode, rather than in shared memory mode. (Only older designs
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have on-board buffer memory needed to support the slower shared memory mode.)
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Most ISA boards have jumpered settings for the I/O base, IRQ line, and DMA
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channel. This driver probes the likely base addresses:
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{0x300, 0x320, 0x340, 0x360}.
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After the board is found it generates a DMA-timeout interrupt and uses
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autoIRQ to find the IRQ line. The DMA channel can be set with the low bits
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of the otherwise-unused dev->mem_start value (aka PARAM1). If unset it is
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probed for by enabling each free DMA channel in turn and checking if
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initialization succeeds.
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The HP-J2405A board is an exception: with this board it is easy to read the
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EEPROM-set values for the base, IRQ, and DMA. (Of course you must already
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_know_ the base address -- that field is for writing the EEPROM.)
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III. Driver operation
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IIIa. Ring buffers
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The LANCE uses ring buffers of Tx and Rx descriptors. Each entry describes
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the base and length of the data buffer, along with status bits. The length
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of these buffers is set by LANCE_LOG_{RX,TX}_BUFFERS, which is log_2() of
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the buffer length (rather than being directly the buffer length) for
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implementation ease. The current values are 2 (Tx) and 4 (Rx), which leads to
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ring sizes of 4 (Tx) and 16 (Rx). Increasing the number of ring entries
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needlessly uses extra space and reduces the chance that an upper layer will
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be able to reorder queued Tx packets based on priority. Decreasing the number
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of entries makes it more difficult to achieve back-to-back packet transmission
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and increases the chance that Rx ring will overflow. (Consider the worst case
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of receiving back-to-back minimum-sized packets.)
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The LANCE has the capability to "chain" both Rx and Tx buffers, but this driver
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statically allocates full-sized (slightly oversized -- PKT_BUF_SZ) buffers to
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avoid the administrative overhead. For the Rx side this avoids dynamically
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allocating full-sized buffers "just in case", at the expense of a
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memory-to-memory data copy for each packet received. For most systems this
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is a good tradeoff: the Rx buffer will always be in low memory, the copy
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is inexpensive, and it primes the cache for later packet processing. For Tx
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the buffers are only used when needed as low-memory bounce buffers.
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IIIB. 16M memory limitations.
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For the ISA bus master mode all structures used directly by the LANCE,
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the initialization block, Rx and Tx rings, and data buffers, must be
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accessible from the ISA bus, i.e. in the lower 16M of real memory.
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This is a problem for current Linux kernels on >16M machines. The network
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devices are initialized after memory initialization, and the kernel doles out
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memory from the top of memory downward. The current solution is to have a
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special network initialization routine that's called before memory
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initialization; this will eventually be generalized for all network devices.
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As mentioned before, low-memory "bounce-buffers" are used when needed.
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IIIC. Synchronization
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The driver runs as two independent, single-threaded flows of control. One
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is the send-packet routine, which enforces single-threaded use by the
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dev->tbusy flag. The other thread is the interrupt handler, which is single
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threaded by the hardware and other software.
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The send packet thread has partial control over the Tx ring and 'dev->tbusy'
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flag. It sets the tbusy flag whenever it's queuing a Tx packet. If the next
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queue slot is empty, it clears the tbusy flag when finished otherwise it sets
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the 'lp->tx_full' flag.
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The interrupt handler has exclusive control over the Rx ring and records stats
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from the Tx ring. (The Tx-done interrupt can't be selectively turned off, so
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we can't avoid the interrupt overhead by having the Tx routine reap the Tx
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stats.) After reaping the stats, it marks the queue entry as empty by setting
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the 'base' to zero. Iff the 'lp->tx_full' flag is set, it clears both the
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tx_full and tbusy flags.
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*/
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/* Set the number of Tx and Rx buffers, using Log_2(# buffers).
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Reasonable default values are 16 Tx buffers, and 16 Rx buffers.
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That translates to 4 and 4 (16 == 2^^4).
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This is a compile-time option for efficiency.
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*/
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#ifndef LANCE_LOG_TX_BUFFERS
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#define LANCE_LOG_TX_BUFFERS 4
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#define LANCE_LOG_RX_BUFFERS 4
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#endif
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#define TX_RING_SIZE (1 << (LANCE_LOG_TX_BUFFERS))
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#define TX_RING_MOD_MASK (TX_RING_SIZE - 1)
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#define TX_RING_LEN_BITS ((LANCE_LOG_TX_BUFFERS) << 29)
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#define RX_RING_SIZE (1 << (LANCE_LOG_RX_BUFFERS))
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#define RX_RING_MOD_MASK (RX_RING_SIZE - 1)
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#define RX_RING_LEN_BITS ((LANCE_LOG_RX_BUFFERS) << 29)
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#define PKT_BUF_SZ 1544
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/* Offsets from base I/O address. */
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#define LANCE_DATA 0x10
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#define LANCE_ADDR 0x12
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#define LANCE_RESET 0x14
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#define LANCE_BUS_IF 0x16
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#define LANCE_TOTAL_SIZE 0x18
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#define TX_TIMEOUT 20
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/* The LANCE Rx and Tx ring descriptors. */
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struct lance_rx_head {
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s32 base;
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s16 buf_length; /* This length is 2s complement (negative)! */
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s16 msg_length; /* This length is "normal". */
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};
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struct lance_tx_head {
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s32 base;
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s16 length; /* Length is 2s complement (negative)! */
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s16 misc;
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};
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/* The LANCE initialization block, described in databook. */
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struct lance_init_block {
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u16 mode; /* Pre-set mode (reg. 15) */
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u8 phys_addr[6]; /* Physical ethernet address */
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u32 filter[2]; /* Multicast filter (unused). */
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/* Receive and transmit ring base, along with extra bits. */
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u32 rx_ring; /* Tx and Rx ring base pointers */
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u32 tx_ring;
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};
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struct lance_private {
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/* The Tx and Rx ring entries must be aligned on 8-byte boundaries. */
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struct lance_rx_head rx_ring[RX_RING_SIZE];
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struct lance_tx_head tx_ring[TX_RING_SIZE];
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struct lance_init_block init_block;
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const char *name;
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/* The saved address of a sent-in-place packet/buffer, for skfree(). */
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struct sk_buff* tx_skbuff[TX_RING_SIZE];
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/* The addresses of receive-in-place skbuffs. */
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struct sk_buff* rx_skbuff[RX_RING_SIZE];
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unsigned long rx_buffs; /* Address of Rx and Tx buffers. */
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/* Tx low-memory "bounce buffer" address. */
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char (*tx_bounce_buffs)[PKT_BUF_SZ];
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int cur_rx, cur_tx; /* The next free ring entry */
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int dirty_rx, dirty_tx; /* The ring entries to be free()ed. */
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int dma;
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struct net_device_stats stats;
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unsigned char chip_version; /* See lance_chip_type. */
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spinlock_t devlock;
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};
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#define LANCE_MUST_PAD 0x00000001
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#define LANCE_ENABLE_AUTOSELECT 0x00000002
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#define LANCE_MUST_REINIT_RING 0x00000004
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#define LANCE_MUST_UNRESET 0x00000008
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#define LANCE_HAS_MISSED_FRAME 0x00000010
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/* A mapping from the chip ID number to the part number and features.
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These are from the datasheets -- in real life the '970 version
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reportedly has the same ID as the '965. */
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static struct lance_chip_type {
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int id_number;
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const char *name;
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int flags;
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} chip_table[] = {
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{0x0000, "LANCE 7990", /* Ancient lance chip. */
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LANCE_MUST_PAD + LANCE_MUST_UNRESET},
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{0x0003, "PCnet/ISA 79C960", /* 79C960 PCnet/ISA. */
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LANCE_ENABLE_AUTOSELECT + LANCE_MUST_REINIT_RING +
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LANCE_HAS_MISSED_FRAME},
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{0x2260, "PCnet/ISA+ 79C961", /* 79C961 PCnet/ISA+, Plug-n-Play. */
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LANCE_ENABLE_AUTOSELECT + LANCE_MUST_REINIT_RING +
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LANCE_HAS_MISSED_FRAME},
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{0x2420, "PCnet/PCI 79C970", /* 79C970 or 79C974 PCnet-SCSI, PCI. */
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LANCE_ENABLE_AUTOSELECT + LANCE_MUST_REINIT_RING +
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LANCE_HAS_MISSED_FRAME},
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/* Bug: the PCnet/PCI actually uses the PCnet/VLB ID number, so just call
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it the PCnet32. */
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{0x2430, "PCnet32", /* 79C965 PCnet for VL bus. */
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LANCE_ENABLE_AUTOSELECT + LANCE_MUST_REINIT_RING +
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LANCE_HAS_MISSED_FRAME},
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{0x2621, "PCnet/PCI-II 79C970A", /* 79C970A PCInetPCI II. */
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LANCE_ENABLE_AUTOSELECT + LANCE_MUST_REINIT_RING +
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LANCE_HAS_MISSED_FRAME},
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{0x0, "PCnet (unknown)",
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LANCE_ENABLE_AUTOSELECT + LANCE_MUST_REINIT_RING +
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LANCE_HAS_MISSED_FRAME},
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};
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enum {OLD_LANCE = 0, PCNET_ISA=1, PCNET_ISAP=2, PCNET_PCI=3, PCNET_VLB=4, PCNET_PCI_II=5, LANCE_UNKNOWN=6};
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/* Non-zero if lance_probe1() needs to allocate low-memory bounce buffers.
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Assume yes until we know the memory size. */
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static unsigned char lance_need_isa_bounce_buffers = 1;
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static int lance_open(struct net_device *dev);
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static void lance_init_ring(struct net_device *dev, gfp_t mode);
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static int lance_start_xmit(struct sk_buff *skb, struct net_device *dev);
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static int lance_rx(struct net_device *dev);
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static irqreturn_t lance_interrupt(int irq, void *dev_id);
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static int lance_close(struct net_device *dev);
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static struct net_device_stats *lance_get_stats(struct net_device *dev);
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static void set_multicast_list(struct net_device *dev);
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static void lance_tx_timeout (struct net_device *dev);
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#ifdef MODULE
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#define MAX_CARDS 8 /* Max number of interfaces (cards) per module */
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static struct net_device *dev_lance[MAX_CARDS];
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static int io[MAX_CARDS];
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static int dma[MAX_CARDS];
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static int irq[MAX_CARDS];
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module_param_array(io, int, NULL, 0);
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module_param_array(dma, int, NULL, 0);
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module_param_array(irq, int, NULL, 0);
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module_param(lance_debug, int, 0);
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MODULE_PARM_DESC(io, "LANCE/PCnet I/O base address(es),required");
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MODULE_PARM_DESC(dma, "LANCE/PCnet ISA DMA channel (ignored for some devices)");
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MODULE_PARM_DESC(irq, "LANCE/PCnet IRQ number (ignored for some devices)");
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MODULE_PARM_DESC(lance_debug, "LANCE/PCnet debug level (0-7)");
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int __init init_module(void)
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{
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struct net_device *dev;
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int this_dev, found = 0;
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for (this_dev = 0; this_dev < MAX_CARDS; this_dev++) {
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if (io[this_dev] == 0) {
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if (this_dev != 0) /* only complain once */
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break;
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printk(KERN_NOTICE "lance.c: Module autoprobing not allowed. Append \"io=0xNNN\" value(s).\n");
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return -EPERM;
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}
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dev = alloc_etherdev(0);
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if (!dev)
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break;
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dev->irq = irq[this_dev];
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dev->base_addr = io[this_dev];
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dev->dma = dma[this_dev];
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if (do_lance_probe(dev) == 0) {
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dev_lance[found++] = dev;
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continue;
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}
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free_netdev(dev);
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break;
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}
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if (found != 0)
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return 0;
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return -ENXIO;
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}
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static void cleanup_card(struct net_device *dev)
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{
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struct lance_private *lp = dev->priv;
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if (dev->dma != 4)
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free_dma(dev->dma);
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release_region(dev->base_addr, LANCE_TOTAL_SIZE);
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kfree(lp->tx_bounce_buffs);
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kfree((void*)lp->rx_buffs);
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kfree(lp);
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}
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void __exit cleanup_module(void)
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{
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int this_dev;
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for (this_dev = 0; this_dev < MAX_CARDS; this_dev++) {
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struct net_device *dev = dev_lance[this_dev];
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if (dev) {
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unregister_netdev(dev);
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cleanup_card(dev);
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free_netdev(dev);
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}
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}
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}
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#endif /* MODULE */
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MODULE_LICENSE("GPL");
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/* Starting in v2.1.*, the LANCE/PCnet probe is now similar to the other
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board probes now that kmalloc() can allocate ISA DMA-able regions.
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This also allows the LANCE driver to be used as a module.
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*/
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static int __init do_lance_probe(struct net_device *dev)
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{
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int *port, result;
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if (high_memory <= phys_to_virt(16*1024*1024))
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lance_need_isa_bounce_buffers = 0;
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for (port = lance_portlist; *port; port++) {
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int ioaddr = *port;
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struct resource *r = request_region(ioaddr, LANCE_TOTAL_SIZE,
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"lance-probe");
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if (r) {
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/* Detect the card with minimal I/O reads */
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char offset14 = inb(ioaddr + 14);
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int card;
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for (card = 0; card < NUM_CARDS; ++card)
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if (cards[card].id_offset14 == offset14)
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break;
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if (card < NUM_CARDS) {/*yes, the first byte matches*/
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char offset15 = inb(ioaddr + 15);
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for (card = 0; card < NUM_CARDS; ++card)
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if ((cards[card].id_offset14 == offset14) &&
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(cards[card].id_offset15 == offset15))
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break;
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}
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if (card < NUM_CARDS) { /*Signature OK*/
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result = lance_probe1(dev, ioaddr, 0, 0);
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if (!result) {
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struct lance_private *lp = dev->priv;
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int ver = lp->chip_version;
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r->name = chip_table[ver].name;
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return 0;
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}
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}
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release_region(ioaddr, LANCE_TOTAL_SIZE);
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}
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}
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return -ENODEV;
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}
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#ifndef MODULE
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struct net_device * __init lance_probe(int unit)
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{
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struct net_device *dev = alloc_etherdev(0);
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int err;
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if (!dev)
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return ERR_PTR(-ENODEV);
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|
|
sprintf(dev->name, "eth%d", unit);
|
|
netdev_boot_setup_check(dev);
|
|
|
|
err = do_lance_probe(dev);
|
|
if (err)
|
|
goto out;
|
|
return dev;
|
|
out:
|
|
free_netdev(dev);
|
|
return ERR_PTR(err);
|
|
}
|
|
#endif
|
|
|
|
static int __init lance_probe1(struct net_device *dev, int ioaddr, int irq, int options)
|
|
{
|
|
struct lance_private *lp;
|
|
long dma_channels; /* Mark spuriously-busy DMA channels */
|
|
int i, reset_val, lance_version;
|
|
const char *chipname;
|
|
/* Flags for specific chips or boards. */
|
|
unsigned char hpJ2405A = 0; /* HP ISA adaptor */
|
|
int hp_builtin = 0; /* HP on-board ethernet. */
|
|
static int did_version; /* Already printed version info. */
|
|
unsigned long flags;
|
|
int err = -ENOMEM;
|
|
void __iomem *bios;
|
|
|
|
/* First we look for special cases.
|
|
Check for HP's on-board ethernet by looking for 'HP' in the BIOS.
|
|
There are two HP versions, check the BIOS for the configuration port.
|
|
This method provided by L. Julliard, Laurent_Julliard@grenoble.hp.com.
|
|
*/
|
|
bios = ioremap(0xf00f0, 0x14);
|
|
if (!bios)
|
|
return -ENOMEM;
|
|
if (readw(bios + 0x12) == 0x5048) {
|
|
static const short ioaddr_table[] = { 0x300, 0x320, 0x340, 0x360};
|
|
int hp_port = (readl(bios + 1) & 1) ? 0x499 : 0x99;
|
|
/* We can have boards other than the built-in! Verify this is on-board. */
|
|
if ((inb(hp_port) & 0xc0) == 0x80
|
|
&& ioaddr_table[inb(hp_port) & 3] == ioaddr)
|
|
hp_builtin = hp_port;
|
|
}
|
|
iounmap(bios);
|
|
/* We also recognize the HP Vectra on-board here, but check below. */
|
|
hpJ2405A = (inb(ioaddr) == 0x08 && inb(ioaddr+1) == 0x00
|
|
&& inb(ioaddr+2) == 0x09);
|
|
|
|
/* Reset the LANCE. */
|
|
reset_val = inw(ioaddr+LANCE_RESET); /* Reset the LANCE */
|
|
|
|
/* The Un-Reset needed is only needed for the real NE2100, and will
|
|
confuse the HP board. */
|
|
if (!hpJ2405A)
|
|
outw(reset_val, ioaddr+LANCE_RESET);
|
|
|
|
outw(0x0000, ioaddr+LANCE_ADDR); /* Switch to window 0 */
|
|
if (inw(ioaddr+LANCE_DATA) != 0x0004)
|
|
return -ENODEV;
|
|
|
|
/* Get the version of the chip. */
|
|
outw(88, ioaddr+LANCE_ADDR);
|
|
if (inw(ioaddr+LANCE_ADDR) != 88) {
|
|
lance_version = 0;
|
|
} else { /* Good, it's a newer chip. */
|
|
int chip_version = inw(ioaddr+LANCE_DATA);
|
|
outw(89, ioaddr+LANCE_ADDR);
|
|
chip_version |= inw(ioaddr+LANCE_DATA) << 16;
|
|
if (lance_debug > 2)
|
|
printk(" LANCE chip version is %#x.\n", chip_version);
|
|
if ((chip_version & 0xfff) != 0x003)
|
|
return -ENODEV;
|
|
chip_version = (chip_version >> 12) & 0xffff;
|
|
for (lance_version = 1; chip_table[lance_version].id_number; lance_version++) {
|
|
if (chip_table[lance_version].id_number == chip_version)
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* We can't allocate dev->priv from alloc_etherdev() because it must
|
|
a ISA DMA-able region. */
|
|
SET_MODULE_OWNER(dev);
|
|
chipname = chip_table[lance_version].name;
|
|
printk("%s: %s at %#3x,", dev->name, chipname, ioaddr);
|
|
|
|
/* There is a 16 byte station address PROM at the base address.
|
|
The first six bytes are the station address. */
|
|
for (i = 0; i < 6; i++)
|
|
printk(" %2.2x", dev->dev_addr[i] = inb(ioaddr + i));
|
|
|
|
dev->base_addr = ioaddr;
|
|
/* Make certain the data structures used by the LANCE are aligned and DMAble. */
|
|
|
|
lp = kmalloc(sizeof(*lp), GFP_DMA | GFP_KERNEL);
|
|
if(lp==NULL)
|
|
return -ENODEV;
|
|
if (lance_debug > 6) printk(" (#0x%05lx)", (unsigned long)lp);
|
|
memset(lp, 0, sizeof(*lp));
|
|
dev->priv = lp;
|
|
lp->name = chipname;
|
|
lp->rx_buffs = (unsigned long)kmalloc(PKT_BUF_SZ*RX_RING_SIZE,
|
|
GFP_DMA | GFP_KERNEL);
|
|
if (!lp->rx_buffs)
|
|
goto out_lp;
|
|
if (lance_need_isa_bounce_buffers) {
|
|
lp->tx_bounce_buffs = kmalloc(PKT_BUF_SZ*TX_RING_SIZE,
|
|
GFP_DMA | GFP_KERNEL);
|
|
if (!lp->tx_bounce_buffs)
|
|
goto out_rx;
|
|
} else
|
|
lp->tx_bounce_buffs = NULL;
|
|
|
|
lp->chip_version = lance_version;
|
|
spin_lock_init(&lp->devlock);
|
|
|
|
lp->init_block.mode = 0x0003; /* Disable Rx and Tx. */
|
|
for (i = 0; i < 6; i++)
|
|
lp->init_block.phys_addr[i] = dev->dev_addr[i];
|
|
lp->init_block.filter[0] = 0x00000000;
|
|
lp->init_block.filter[1] = 0x00000000;
|
|
lp->init_block.rx_ring = ((u32)isa_virt_to_bus(lp->rx_ring) & 0xffffff) | RX_RING_LEN_BITS;
|
|
lp->init_block.tx_ring = ((u32)isa_virt_to_bus(lp->tx_ring) & 0xffffff) | TX_RING_LEN_BITS;
|
|
|
|
outw(0x0001, ioaddr+LANCE_ADDR);
|
|
inw(ioaddr+LANCE_ADDR);
|
|
outw((short) (u32) isa_virt_to_bus(&lp->init_block), ioaddr+LANCE_DATA);
|
|
outw(0x0002, ioaddr+LANCE_ADDR);
|
|
inw(ioaddr+LANCE_ADDR);
|
|
outw(((u32)isa_virt_to_bus(&lp->init_block)) >> 16, ioaddr+LANCE_DATA);
|
|
outw(0x0000, ioaddr+LANCE_ADDR);
|
|
inw(ioaddr+LANCE_ADDR);
|
|
|
|
if (irq) { /* Set iff PCI card. */
|
|
dev->dma = 4; /* Native bus-master, no DMA channel needed. */
|
|
dev->irq = irq;
|
|
} else if (hp_builtin) {
|
|
static const char dma_tbl[4] = {3, 5, 6, 0};
|
|
static const char irq_tbl[4] = {3, 4, 5, 9};
|
|
unsigned char port_val = inb(hp_builtin);
|
|
dev->dma = dma_tbl[(port_val >> 4) & 3];
|
|
dev->irq = irq_tbl[(port_val >> 2) & 3];
|
|
printk(" HP Vectra IRQ %d DMA %d.\n", dev->irq, dev->dma);
|
|
} else if (hpJ2405A) {
|
|
static const char dma_tbl[4] = {3, 5, 6, 7};
|
|
static const char irq_tbl[8] = {3, 4, 5, 9, 10, 11, 12, 15};
|
|
short reset_val = inw(ioaddr+LANCE_RESET);
|
|
dev->dma = dma_tbl[(reset_val >> 2) & 3];
|
|
dev->irq = irq_tbl[(reset_val >> 4) & 7];
|
|
printk(" HP J2405A IRQ %d DMA %d.\n", dev->irq, dev->dma);
|
|
} else if (lance_version == PCNET_ISAP) { /* The plug-n-play version. */
|
|
short bus_info;
|
|
outw(8, ioaddr+LANCE_ADDR);
|
|
bus_info = inw(ioaddr+LANCE_BUS_IF);
|
|
dev->dma = bus_info & 0x07;
|
|
dev->irq = (bus_info >> 4) & 0x0F;
|
|
} else {
|
|
/* The DMA channel may be passed in PARAM1. */
|
|
if (dev->mem_start & 0x07)
|
|
dev->dma = dev->mem_start & 0x07;
|
|
}
|
|
|
|
if (dev->dma == 0) {
|
|
/* Read the DMA channel status register, so that we can avoid
|
|
stuck DMA channels in the DMA detection below. */
|
|
dma_channels = ((inb(DMA1_STAT_REG) >> 4) & 0x0f) |
|
|
(inb(DMA2_STAT_REG) & 0xf0);
|
|
}
|
|
err = -ENODEV;
|
|
if (dev->irq >= 2)
|
|
printk(" assigned IRQ %d", dev->irq);
|
|
else if (lance_version != 0) { /* 7990 boards need DMA detection first. */
|
|
unsigned long irq_mask;
|
|
|
|
/* To auto-IRQ we enable the initialization-done and DMA error
|
|
interrupts. For ISA boards we get a DMA error, but VLB and PCI
|
|
boards will work. */
|
|
irq_mask = probe_irq_on();
|
|
|
|
/* Trigger an initialization just for the interrupt. */
|
|
outw(0x0041, ioaddr+LANCE_DATA);
|
|
|
|
mdelay(20);
|
|
dev->irq = probe_irq_off(irq_mask);
|
|
if (dev->irq)
|
|
printk(", probed IRQ %d", dev->irq);
|
|
else {
|
|
printk(", failed to detect IRQ line.\n");
|
|
goto out_tx;
|
|
}
|
|
|
|
/* Check for the initialization done bit, 0x0100, which means
|
|
that we don't need a DMA channel. */
|
|
if (inw(ioaddr+LANCE_DATA) & 0x0100)
|
|
dev->dma = 4;
|
|
}
|
|
|
|
if (dev->dma == 4) {
|
|
printk(", no DMA needed.\n");
|
|
} else if (dev->dma) {
|
|
if (request_dma(dev->dma, chipname)) {
|
|
printk("DMA %d allocation failed.\n", dev->dma);
|
|
goto out_tx;
|
|
} else
|
|
printk(", assigned DMA %d.\n", dev->dma);
|
|
} else { /* OK, we have to auto-DMA. */
|
|
for (i = 0; i < 4; i++) {
|
|
static const char dmas[] = { 5, 6, 7, 3 };
|
|
int dma = dmas[i];
|
|
int boguscnt;
|
|
|
|
/* Don't enable a permanently busy DMA channel, or the machine
|
|
will hang. */
|
|
if (test_bit(dma, &dma_channels))
|
|
continue;
|
|
outw(0x7f04, ioaddr+LANCE_DATA); /* Clear the memory error bits. */
|
|
if (request_dma(dma, chipname))
|
|
continue;
|
|
|
|
flags=claim_dma_lock();
|
|
set_dma_mode(dma, DMA_MODE_CASCADE);
|
|
enable_dma(dma);
|
|
release_dma_lock(flags);
|
|
|
|
/* Trigger an initialization. */
|
|
outw(0x0001, ioaddr+LANCE_DATA);
|
|
for (boguscnt = 100; boguscnt > 0; --boguscnt)
|
|
if (inw(ioaddr+LANCE_DATA) & 0x0900)
|
|
break;
|
|
if (inw(ioaddr+LANCE_DATA) & 0x0100) {
|
|
dev->dma = dma;
|
|
printk(", DMA %d.\n", dev->dma);
|
|
break;
|
|
} else {
|
|
flags=claim_dma_lock();
|
|
disable_dma(dma);
|
|
release_dma_lock(flags);
|
|
free_dma(dma);
|
|
}
|
|
}
|
|
if (i == 4) { /* Failure: bail. */
|
|
printk("DMA detection failed.\n");
|
|
goto out_tx;
|
|
}
|
|
}
|
|
|
|
if (lance_version == 0 && dev->irq == 0) {
|
|
/* We may auto-IRQ now that we have a DMA channel. */
|
|
/* Trigger an initialization just for the interrupt. */
|
|
unsigned long irq_mask;
|
|
|
|
irq_mask = probe_irq_on();
|
|
outw(0x0041, ioaddr+LANCE_DATA);
|
|
|
|
mdelay(40);
|
|
dev->irq = probe_irq_off(irq_mask);
|
|
if (dev->irq == 0) {
|
|
printk(" Failed to detect the 7990 IRQ line.\n");
|
|
goto out_dma;
|
|
}
|
|
printk(" Auto-IRQ detected IRQ%d.\n", dev->irq);
|
|
}
|
|
|
|
if (chip_table[lp->chip_version].flags & LANCE_ENABLE_AUTOSELECT) {
|
|
/* Turn on auto-select of media (10baseT or BNC) so that the user
|
|
can watch the LEDs even if the board isn't opened. */
|
|
outw(0x0002, ioaddr+LANCE_ADDR);
|
|
/* Don't touch 10base2 power bit. */
|
|
outw(inw(ioaddr+LANCE_BUS_IF) | 0x0002, ioaddr+LANCE_BUS_IF);
|
|
}
|
|
|
|
if (lance_debug > 0 && did_version++ == 0)
|
|
printk(version);
|
|
|
|
/* The LANCE-specific entries in the device structure. */
|
|
dev->open = lance_open;
|
|
dev->hard_start_xmit = lance_start_xmit;
|
|
dev->stop = lance_close;
|
|
dev->get_stats = lance_get_stats;
|
|
dev->set_multicast_list = set_multicast_list;
|
|
dev->tx_timeout = lance_tx_timeout;
|
|
dev->watchdog_timeo = TX_TIMEOUT;
|
|
|
|
err = register_netdev(dev);
|
|
if (err)
|
|
goto out_dma;
|
|
return 0;
|
|
out_dma:
|
|
if (dev->dma != 4)
|
|
free_dma(dev->dma);
|
|
out_tx:
|
|
kfree(lp->tx_bounce_buffs);
|
|
out_rx:
|
|
kfree((void*)lp->rx_buffs);
|
|
out_lp:
|
|
kfree(lp);
|
|
return err;
|
|
}
|
|
|
|
|
|
static int
|
|
lance_open(struct net_device *dev)
|
|
{
|
|
struct lance_private *lp = dev->priv;
|
|
int ioaddr = dev->base_addr;
|
|
int i;
|
|
|
|
if (dev->irq == 0 ||
|
|
request_irq(dev->irq, &lance_interrupt, 0, lp->name, dev)) {
|
|
return -EAGAIN;
|
|
}
|
|
|
|
/* We used to allocate DMA here, but that was silly.
|
|
DMA lines can't be shared! We now permanently allocate them. */
|
|
|
|
/* Reset the LANCE */
|
|
inw(ioaddr+LANCE_RESET);
|
|
|
|
/* The DMA controller is used as a no-operation slave, "cascade mode". */
|
|
if (dev->dma != 4) {
|
|
unsigned long flags=claim_dma_lock();
|
|
enable_dma(dev->dma);
|
|
set_dma_mode(dev->dma, DMA_MODE_CASCADE);
|
|
release_dma_lock(flags);
|
|
}
|
|
|
|
/* Un-Reset the LANCE, needed only for the NE2100. */
|
|
if (chip_table[lp->chip_version].flags & LANCE_MUST_UNRESET)
|
|
outw(0, ioaddr+LANCE_RESET);
|
|
|
|
if (chip_table[lp->chip_version].flags & LANCE_ENABLE_AUTOSELECT) {
|
|
/* This is 79C960-specific: Turn on auto-select of media (AUI, BNC). */
|
|
outw(0x0002, ioaddr+LANCE_ADDR);
|
|
/* Only touch autoselect bit. */
|
|
outw(inw(ioaddr+LANCE_BUS_IF) | 0x0002, ioaddr+LANCE_BUS_IF);
|
|
}
|
|
|
|
if (lance_debug > 1)
|
|
printk("%s: lance_open() irq %d dma %d tx/rx rings %#x/%#x init %#x.\n",
|
|
dev->name, dev->irq, dev->dma,
|
|
(u32) isa_virt_to_bus(lp->tx_ring),
|
|
(u32) isa_virt_to_bus(lp->rx_ring),
|
|
(u32) isa_virt_to_bus(&lp->init_block));
|
|
|
|
lance_init_ring(dev, GFP_KERNEL);
|
|
/* Re-initialize the LANCE, and start it when done. */
|
|
outw(0x0001, ioaddr+LANCE_ADDR);
|
|
outw((short) (u32) isa_virt_to_bus(&lp->init_block), ioaddr+LANCE_DATA);
|
|
outw(0x0002, ioaddr+LANCE_ADDR);
|
|
outw(((u32)isa_virt_to_bus(&lp->init_block)) >> 16, ioaddr+LANCE_DATA);
|
|
|
|
outw(0x0004, ioaddr+LANCE_ADDR);
|
|
outw(0x0915, ioaddr+LANCE_DATA);
|
|
|
|
outw(0x0000, ioaddr+LANCE_ADDR);
|
|
outw(0x0001, ioaddr+LANCE_DATA);
|
|
|
|
netif_start_queue (dev);
|
|
|
|
i = 0;
|
|
while (i++ < 100)
|
|
if (inw(ioaddr+LANCE_DATA) & 0x0100)
|
|
break;
|
|
/*
|
|
* We used to clear the InitDone bit, 0x0100, here but Mark Stockton
|
|
* reports that doing so triggers a bug in the '974.
|
|
*/
|
|
outw(0x0042, ioaddr+LANCE_DATA);
|
|
|
|
if (lance_debug > 2)
|
|
printk("%s: LANCE open after %d ticks, init block %#x csr0 %4.4x.\n",
|
|
dev->name, i, (u32) isa_virt_to_bus(&lp->init_block), inw(ioaddr+LANCE_DATA));
|
|
|
|
return 0; /* Always succeed */
|
|
}
|
|
|
|
/* The LANCE has been halted for one reason or another (busmaster memory
|
|
arbitration error, Tx FIFO underflow, driver stopped it to reconfigure,
|
|
etc.). Modern LANCE variants always reload their ring-buffer
|
|
configuration when restarted, so we must reinitialize our ring
|
|
context before restarting. As part of this reinitialization,
|
|
find all packets still on the Tx ring and pretend that they had been
|
|
sent (in effect, drop the packets on the floor) - the higher-level
|
|
protocols will time out and retransmit. It'd be better to shuffle
|
|
these skbs to a temp list and then actually re-Tx them after
|
|
restarting the chip, but I'm too lazy to do so right now. dplatt@3do.com
|
|
*/
|
|
|
|
static void
|
|
lance_purge_ring(struct net_device *dev)
|
|
{
|
|
struct lance_private *lp = dev->priv;
|
|
int i;
|
|
|
|
/* Free all the skbuffs in the Rx and Tx queues. */
|
|
for (i = 0; i < RX_RING_SIZE; i++) {
|
|
struct sk_buff *skb = lp->rx_skbuff[i];
|
|
lp->rx_skbuff[i] = NULL;
|
|
lp->rx_ring[i].base = 0; /* Not owned by LANCE chip. */
|
|
if (skb)
|
|
dev_kfree_skb_any(skb);
|
|
}
|
|
for (i = 0; i < TX_RING_SIZE; i++) {
|
|
if (lp->tx_skbuff[i]) {
|
|
dev_kfree_skb_any(lp->tx_skbuff[i]);
|
|
lp->tx_skbuff[i] = NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/* Initialize the LANCE Rx and Tx rings. */
|
|
static void
|
|
lance_init_ring(struct net_device *dev, gfp_t gfp)
|
|
{
|
|
struct lance_private *lp = dev->priv;
|
|
int i;
|
|
|
|
lp->cur_rx = lp->cur_tx = 0;
|
|
lp->dirty_rx = lp->dirty_tx = 0;
|
|
|
|
for (i = 0; i < RX_RING_SIZE; i++) {
|
|
struct sk_buff *skb;
|
|
void *rx_buff;
|
|
|
|
skb = alloc_skb(PKT_BUF_SZ, GFP_DMA | gfp);
|
|
lp->rx_skbuff[i] = skb;
|
|
if (skb) {
|
|
skb->dev = dev;
|
|
rx_buff = skb->data;
|
|
} else
|
|
rx_buff = kmalloc(PKT_BUF_SZ, GFP_DMA | gfp);
|
|
if (rx_buff == NULL)
|
|
lp->rx_ring[i].base = 0;
|
|
else
|
|
lp->rx_ring[i].base = (u32)isa_virt_to_bus(rx_buff) | 0x80000000;
|
|
lp->rx_ring[i].buf_length = -PKT_BUF_SZ;
|
|
}
|
|
/* The Tx buffer address is filled in as needed, but we do need to clear
|
|
the upper ownership bit. */
|
|
for (i = 0; i < TX_RING_SIZE; i++) {
|
|
lp->tx_skbuff[i] = NULL;
|
|
lp->tx_ring[i].base = 0;
|
|
}
|
|
|
|
lp->init_block.mode = 0x0000;
|
|
for (i = 0; i < 6; i++)
|
|
lp->init_block.phys_addr[i] = dev->dev_addr[i];
|
|
lp->init_block.filter[0] = 0x00000000;
|
|
lp->init_block.filter[1] = 0x00000000;
|
|
lp->init_block.rx_ring = ((u32)isa_virt_to_bus(lp->rx_ring) & 0xffffff) | RX_RING_LEN_BITS;
|
|
lp->init_block.tx_ring = ((u32)isa_virt_to_bus(lp->tx_ring) & 0xffffff) | TX_RING_LEN_BITS;
|
|
}
|
|
|
|
static void
|
|
lance_restart(struct net_device *dev, unsigned int csr0_bits, int must_reinit)
|
|
{
|
|
struct lance_private *lp = dev->priv;
|
|
|
|
if (must_reinit ||
|
|
(chip_table[lp->chip_version].flags & LANCE_MUST_REINIT_RING)) {
|
|
lance_purge_ring(dev);
|
|
lance_init_ring(dev, GFP_ATOMIC);
|
|
}
|
|
outw(0x0000, dev->base_addr + LANCE_ADDR);
|
|
outw(csr0_bits, dev->base_addr + LANCE_DATA);
|
|
}
|
|
|
|
|
|
static void lance_tx_timeout (struct net_device *dev)
|
|
{
|
|
struct lance_private *lp = (struct lance_private *) dev->priv;
|
|
int ioaddr = dev->base_addr;
|
|
|
|
outw (0, ioaddr + LANCE_ADDR);
|
|
printk ("%s: transmit timed out, status %4.4x, resetting.\n",
|
|
dev->name, inw (ioaddr + LANCE_DATA));
|
|
outw (0x0004, ioaddr + LANCE_DATA);
|
|
lp->stats.tx_errors++;
|
|
#ifndef final_version
|
|
if (lance_debug > 3) {
|
|
int i;
|
|
printk (" Ring data dump: dirty_tx %d cur_tx %d%s cur_rx %d.",
|
|
lp->dirty_tx, lp->cur_tx, netif_queue_stopped(dev) ? " (full)" : "",
|
|
lp->cur_rx);
|
|
for (i = 0; i < RX_RING_SIZE; i++)
|
|
printk ("%s %08x %04x %04x", i & 0x3 ? "" : "\n ",
|
|
lp->rx_ring[i].base, -lp->rx_ring[i].buf_length,
|
|
lp->rx_ring[i].msg_length);
|
|
for (i = 0; i < TX_RING_SIZE; i++)
|
|
printk ("%s %08x %04x %04x", i & 0x3 ? "" : "\n ",
|
|
lp->tx_ring[i].base, -lp->tx_ring[i].length,
|
|
lp->tx_ring[i].misc);
|
|
printk ("\n");
|
|
}
|
|
#endif
|
|
lance_restart (dev, 0x0043, 1);
|
|
|
|
dev->trans_start = jiffies;
|
|
netif_wake_queue (dev);
|
|
}
|
|
|
|
|
|
static int lance_start_xmit(struct sk_buff *skb, struct net_device *dev)
|
|
{
|
|
struct lance_private *lp = dev->priv;
|
|
int ioaddr = dev->base_addr;
|
|
int entry;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&lp->devlock, flags);
|
|
|
|
if (lance_debug > 3) {
|
|
outw(0x0000, ioaddr+LANCE_ADDR);
|
|
printk("%s: lance_start_xmit() called, csr0 %4.4x.\n", dev->name,
|
|
inw(ioaddr+LANCE_DATA));
|
|
outw(0x0000, ioaddr+LANCE_DATA);
|
|
}
|
|
|
|
/* Fill in a Tx ring entry */
|
|
|
|
/* Mask to ring buffer boundary. */
|
|
entry = lp->cur_tx & TX_RING_MOD_MASK;
|
|
|
|
/* Caution: the write order is important here, set the base address
|
|
with the "ownership" bits last. */
|
|
|
|
/* The old LANCE chips doesn't automatically pad buffers to min. size. */
|
|
if (chip_table[lp->chip_version].flags & LANCE_MUST_PAD) {
|
|
if (skb->len < ETH_ZLEN) {
|
|
if (skb_padto(skb, ETH_ZLEN))
|
|
goto out;
|
|
lp->tx_ring[entry].length = -ETH_ZLEN;
|
|
}
|
|
else
|
|
lp->tx_ring[entry].length = -skb->len;
|
|
} else
|
|
lp->tx_ring[entry].length = -skb->len;
|
|
|
|
lp->tx_ring[entry].misc = 0x0000;
|
|
|
|
lp->stats.tx_bytes += skb->len;
|
|
|
|
/* If any part of this buffer is >16M we must copy it to a low-memory
|
|
buffer. */
|
|
if ((u32)isa_virt_to_bus(skb->data) + skb->len > 0x01000000) {
|
|
if (lance_debug > 5)
|
|
printk("%s: bouncing a high-memory packet (%#x).\n",
|
|
dev->name, (u32)isa_virt_to_bus(skb->data));
|
|
skb_copy_from_linear_data(skb, &lp->tx_bounce_buffs[entry], skb->len);
|
|
lp->tx_ring[entry].base =
|
|
((u32)isa_virt_to_bus((lp->tx_bounce_buffs + entry)) & 0xffffff) | 0x83000000;
|
|
dev_kfree_skb(skb);
|
|
} else {
|
|
lp->tx_skbuff[entry] = skb;
|
|
lp->tx_ring[entry].base = ((u32)isa_virt_to_bus(skb->data) & 0xffffff) | 0x83000000;
|
|
}
|
|
lp->cur_tx++;
|
|
|
|
/* Trigger an immediate send poll. */
|
|
outw(0x0000, ioaddr+LANCE_ADDR);
|
|
outw(0x0048, ioaddr+LANCE_DATA);
|
|
|
|
dev->trans_start = jiffies;
|
|
|
|
if ((lp->cur_tx - lp->dirty_tx) >= TX_RING_SIZE)
|
|
netif_stop_queue(dev);
|
|
|
|
out:
|
|
spin_unlock_irqrestore(&lp->devlock, flags);
|
|
return 0;
|
|
}
|
|
|
|
/* The LANCE interrupt handler. */
|
|
static irqreturn_t lance_interrupt(int irq, void *dev_id)
|
|
{
|
|
struct net_device *dev = dev_id;
|
|
struct lance_private *lp;
|
|
int csr0, ioaddr, boguscnt=10;
|
|
int must_restart;
|
|
|
|
ioaddr = dev->base_addr;
|
|
lp = dev->priv;
|
|
|
|
spin_lock (&lp->devlock);
|
|
|
|
outw(0x00, dev->base_addr + LANCE_ADDR);
|
|
while ((csr0 = inw(dev->base_addr + LANCE_DATA)) & 0x8600
|
|
&& --boguscnt >= 0) {
|
|
/* Acknowledge all of the current interrupt sources ASAP. */
|
|
outw(csr0 & ~0x004f, dev->base_addr + LANCE_DATA);
|
|
|
|
must_restart = 0;
|
|
|
|
if (lance_debug > 5)
|
|
printk("%s: interrupt csr0=%#2.2x new csr=%#2.2x.\n",
|
|
dev->name, csr0, inw(dev->base_addr + LANCE_DATA));
|
|
|
|
if (csr0 & 0x0400) /* Rx interrupt */
|
|
lance_rx(dev);
|
|
|
|
if (csr0 & 0x0200) { /* Tx-done interrupt */
|
|
int dirty_tx = lp->dirty_tx;
|
|
|
|
while (dirty_tx < lp->cur_tx) {
|
|
int entry = dirty_tx & TX_RING_MOD_MASK;
|
|
int status = lp->tx_ring[entry].base;
|
|
|
|
if (status < 0)
|
|
break; /* It still hasn't been Txed */
|
|
|
|
lp->tx_ring[entry].base = 0;
|
|
|
|
if (status & 0x40000000) {
|
|
/* There was an major error, log it. */
|
|
int err_status = lp->tx_ring[entry].misc;
|
|
lp->stats.tx_errors++;
|
|
if (err_status & 0x0400) lp->stats.tx_aborted_errors++;
|
|
if (err_status & 0x0800) lp->stats.tx_carrier_errors++;
|
|
if (err_status & 0x1000) lp->stats.tx_window_errors++;
|
|
if (err_status & 0x4000) {
|
|
/* Ackk! On FIFO errors the Tx unit is turned off! */
|
|
lp->stats.tx_fifo_errors++;
|
|
/* Remove this verbosity later! */
|
|
printk("%s: Tx FIFO error! Status %4.4x.\n",
|
|
dev->name, csr0);
|
|
/* Restart the chip. */
|
|
must_restart = 1;
|
|
}
|
|
} else {
|
|
if (status & 0x18000000)
|
|
lp->stats.collisions++;
|
|
lp->stats.tx_packets++;
|
|
}
|
|
|
|
/* We must free the original skb if it's not a data-only copy
|
|
in the bounce buffer. */
|
|
if (lp->tx_skbuff[entry]) {
|
|
dev_kfree_skb_irq(lp->tx_skbuff[entry]);
|
|
lp->tx_skbuff[entry] = NULL;
|
|
}
|
|
dirty_tx++;
|
|
}
|
|
|
|
#ifndef final_version
|
|
if (lp->cur_tx - dirty_tx >= TX_RING_SIZE) {
|
|
printk("out-of-sync dirty pointer, %d vs. %d, full=%s.\n",
|
|
dirty_tx, lp->cur_tx,
|
|
netif_queue_stopped(dev) ? "yes" : "no");
|
|
dirty_tx += TX_RING_SIZE;
|
|
}
|
|
#endif
|
|
|
|
/* if the ring is no longer full, accept more packets */
|
|
if (netif_queue_stopped(dev) &&
|
|
dirty_tx > lp->cur_tx - TX_RING_SIZE + 2)
|
|
netif_wake_queue (dev);
|
|
|
|
lp->dirty_tx = dirty_tx;
|
|
}
|
|
|
|
/* Log misc errors. */
|
|
if (csr0 & 0x4000) lp->stats.tx_errors++; /* Tx babble. */
|
|
if (csr0 & 0x1000) lp->stats.rx_errors++; /* Missed a Rx frame. */
|
|
if (csr0 & 0x0800) {
|
|
printk("%s: Bus master arbitration failure, status %4.4x.\n",
|
|
dev->name, csr0);
|
|
/* Restart the chip. */
|
|
must_restart = 1;
|
|
}
|
|
|
|
if (must_restart) {
|
|
/* stop the chip to clear the error condition, then restart */
|
|
outw(0x0000, dev->base_addr + LANCE_ADDR);
|
|
outw(0x0004, dev->base_addr + LANCE_DATA);
|
|
lance_restart(dev, 0x0002, 0);
|
|
}
|
|
}
|
|
|
|
/* Clear any other interrupt, and set interrupt enable. */
|
|
outw(0x0000, dev->base_addr + LANCE_ADDR);
|
|
outw(0x7940, dev->base_addr + LANCE_DATA);
|
|
|
|
if (lance_debug > 4)
|
|
printk("%s: exiting interrupt, csr%d=%#4.4x.\n",
|
|
dev->name, inw(ioaddr + LANCE_ADDR),
|
|
inw(dev->base_addr + LANCE_DATA));
|
|
|
|
spin_unlock (&lp->devlock);
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int
|
|
lance_rx(struct net_device *dev)
|
|
{
|
|
struct lance_private *lp = dev->priv;
|
|
int entry = lp->cur_rx & RX_RING_MOD_MASK;
|
|
int i;
|
|
|
|
/* If we own the next entry, it's a new packet. Send it up. */
|
|
while (lp->rx_ring[entry].base >= 0) {
|
|
int status = lp->rx_ring[entry].base >> 24;
|
|
|
|
if (status != 0x03) { /* There was an error. */
|
|
/* There is a tricky error noted by John Murphy,
|
|
<murf@perftech.com> to Russ Nelson: Even with full-sized
|
|
buffers it's possible for a jabber packet to use two
|
|
buffers, with only the last correctly noting the error. */
|
|
if (status & 0x01) /* Only count a general error at the */
|
|
lp->stats.rx_errors++; /* end of a packet.*/
|
|
if (status & 0x20) lp->stats.rx_frame_errors++;
|
|
if (status & 0x10) lp->stats.rx_over_errors++;
|
|
if (status & 0x08) lp->stats.rx_crc_errors++;
|
|
if (status & 0x04) lp->stats.rx_fifo_errors++;
|
|
lp->rx_ring[entry].base &= 0x03ffffff;
|
|
}
|
|
else
|
|
{
|
|
/* Malloc up new buffer, compatible with net3. */
|
|
short pkt_len = (lp->rx_ring[entry].msg_length & 0xfff)-4;
|
|
struct sk_buff *skb;
|
|
|
|
if(pkt_len<60)
|
|
{
|
|
printk("%s: Runt packet!\n",dev->name);
|
|
lp->stats.rx_errors++;
|
|
}
|
|
else
|
|
{
|
|
skb = dev_alloc_skb(pkt_len+2);
|
|
if (skb == NULL)
|
|
{
|
|
printk("%s: Memory squeeze, deferring packet.\n", dev->name);
|
|
for (i=0; i < RX_RING_SIZE; i++)
|
|
if (lp->rx_ring[(entry+i) & RX_RING_MOD_MASK].base < 0)
|
|
break;
|
|
|
|
if (i > RX_RING_SIZE -2)
|
|
{
|
|
lp->stats.rx_dropped++;
|
|
lp->rx_ring[entry].base |= 0x80000000;
|
|
lp->cur_rx++;
|
|
}
|
|
break;
|
|
}
|
|
skb_reserve(skb,2); /* 16 byte align */
|
|
skb_put(skb,pkt_len); /* Make room */
|
|
skb_copy_to_linear_data(skb,
|
|
(unsigned char *)isa_bus_to_virt((lp->rx_ring[entry].base & 0x00ffffff)),
|
|
pkt_len);
|
|
skb->protocol=eth_type_trans(skb,dev);
|
|
netif_rx(skb);
|
|
dev->last_rx = jiffies;
|
|
lp->stats.rx_packets++;
|
|
lp->stats.rx_bytes+=pkt_len;
|
|
}
|
|
}
|
|
/* The docs say that the buffer length isn't touched, but Andrew Boyd
|
|
of QNX reports that some revs of the 79C965 clear it. */
|
|
lp->rx_ring[entry].buf_length = -PKT_BUF_SZ;
|
|
lp->rx_ring[entry].base |= 0x80000000;
|
|
entry = (++lp->cur_rx) & RX_RING_MOD_MASK;
|
|
}
|
|
|
|
/* We should check that at least two ring entries are free. If not,
|
|
we should free one and mark stats->rx_dropped++. */
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
lance_close(struct net_device *dev)
|
|
{
|
|
int ioaddr = dev->base_addr;
|
|
struct lance_private *lp = dev->priv;
|
|
|
|
netif_stop_queue (dev);
|
|
|
|
if (chip_table[lp->chip_version].flags & LANCE_HAS_MISSED_FRAME) {
|
|
outw(112, ioaddr+LANCE_ADDR);
|
|
lp->stats.rx_missed_errors = inw(ioaddr+LANCE_DATA);
|
|
}
|
|
outw(0, ioaddr+LANCE_ADDR);
|
|
|
|
if (lance_debug > 1)
|
|
printk("%s: Shutting down ethercard, status was %2.2x.\n",
|
|
dev->name, inw(ioaddr+LANCE_DATA));
|
|
|
|
/* We stop the LANCE here -- it occasionally polls
|
|
memory if we don't. */
|
|
outw(0x0004, ioaddr+LANCE_DATA);
|
|
|
|
if (dev->dma != 4)
|
|
{
|
|
unsigned long flags=claim_dma_lock();
|
|
disable_dma(dev->dma);
|
|
release_dma_lock(flags);
|
|
}
|
|
free_irq(dev->irq, dev);
|
|
|
|
lance_purge_ring(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct net_device_stats *lance_get_stats(struct net_device *dev)
|
|
{
|
|
struct lance_private *lp = dev->priv;
|
|
|
|
if (chip_table[lp->chip_version].flags & LANCE_HAS_MISSED_FRAME) {
|
|
short ioaddr = dev->base_addr;
|
|
short saved_addr;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&lp->devlock, flags);
|
|
saved_addr = inw(ioaddr+LANCE_ADDR);
|
|
outw(112, ioaddr+LANCE_ADDR);
|
|
lp->stats.rx_missed_errors = inw(ioaddr+LANCE_DATA);
|
|
outw(saved_addr, ioaddr+LANCE_ADDR);
|
|
spin_unlock_irqrestore(&lp->devlock, flags);
|
|
}
|
|
|
|
return &lp->stats;
|
|
}
|
|
|
|
/* Set or clear the multicast filter for this adaptor.
|
|
*/
|
|
|
|
static void set_multicast_list(struct net_device *dev)
|
|
{
|
|
short ioaddr = dev->base_addr;
|
|
|
|
outw(0, ioaddr+LANCE_ADDR);
|
|
outw(0x0004, ioaddr+LANCE_DATA); /* Temporarily stop the lance. */
|
|
|
|
if (dev->flags&IFF_PROMISC) {
|
|
outw(15, ioaddr+LANCE_ADDR);
|
|
outw(0x8000, ioaddr+LANCE_DATA); /* Set promiscuous mode */
|
|
} else {
|
|
short multicast_table[4];
|
|
int i;
|
|
int num_addrs=dev->mc_count;
|
|
if(dev->flags&IFF_ALLMULTI)
|
|
num_addrs=1;
|
|
/* FIXIT: We don't use the multicast table, but rely on upper-layer filtering. */
|
|
memset(multicast_table, (num_addrs == 0) ? 0 : -1, sizeof(multicast_table));
|
|
for (i = 0; i < 4; i++) {
|
|
outw(8 + i, ioaddr+LANCE_ADDR);
|
|
outw(multicast_table[i], ioaddr+LANCE_DATA);
|
|
}
|
|
outw(15, ioaddr+LANCE_ADDR);
|
|
outw(0x0000, ioaddr+LANCE_DATA); /* Unset promiscuous mode */
|
|
}
|
|
|
|
lance_restart(dev, 0x0142, 0); /* Resume normal operation */
|
|
|
|
}
|
|
|