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linux/drivers/net/sonic.h
Finn Thain efcce83936 [PATCH] macsonic/jazzsonic network drivers update 
The purpose of this patch:

- Adopt the DMA API (jazzsonic, macsonic & core driver).

- Adopt the driver model (macsonic).

This part was cribbed from jazzsonic. As a consequence, macsonic once
again works as a module. Driver model is also used by the DMA calls.

- Support 16 bit cards (macsonic & core driver, also affects jazzsonic)

This code was adapted from the mac68k linux 2.2 kernel, where it has
languished for a long time.

- Support more 32-bit mac cards (macsonic)

Also from mac68k repo.

- Zero-copy buffer handling (core driver)

Provides a nice performance improvement. The new algorithm incidentally
helped to replace the old Jazz DMA code.

The patch was tested on a variety of macs (several 32-bit quadra built-in
NICs, a 16-bit LC PDS NIC and a 16-bit comm-slot NIC), and also on MIPS
Jazz.

Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Acked-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
2005-08-23 01:32:12 -04:00

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/*
* Header file for sonic.c
*
* (C) Waldorf Electronics, Germany
* Written by Andreas Busse
*
* NOTE: most of the structure definitions here are endian dependent.
* If you want to use this driver on big endian machines, the data
* and pad structure members must be exchanged. Also, the structures
* need to be changed accordingly to the bus size.
*
* 981229 MSch: did just that for the 68k Mac port (32 bit, big endian)
*
* 990611 David Huggins-Daines <dhd@debian.org>: This machine abstraction
* does not cope with 16-bit bus sizes very well. Therefore I have
* rewritten it with ugly macros and evil inlines.
*
* 050625 Finn Thain: introduced more 32-bit cards and dhd's support
* for 16-bit cards (from the mac68k project).
*/
#ifndef SONIC_H
#define SONIC_H
#include <linux/config.h>
/*
* SONIC register offsets
*/
#define SONIC_CMD 0x00
#define SONIC_DCR 0x01
#define SONIC_RCR 0x02
#define SONIC_TCR 0x03
#define SONIC_IMR 0x04
#define SONIC_ISR 0x05
#define SONIC_UTDA 0x06
#define SONIC_CTDA 0x07
#define SONIC_URDA 0x0d
#define SONIC_CRDA 0x0e
#define SONIC_EOBC 0x13
#define SONIC_URRA 0x14
#define SONIC_RSA 0x15
#define SONIC_REA 0x16
#define SONIC_RRP 0x17
#define SONIC_RWP 0x18
#define SONIC_RSC 0x2b
#define SONIC_CEP 0x21
#define SONIC_CAP2 0x22
#define SONIC_CAP1 0x23
#define SONIC_CAP0 0x24
#define SONIC_CE 0x25
#define SONIC_CDP 0x26
#define SONIC_CDC 0x27
#define SONIC_WT0 0x29
#define SONIC_WT1 0x2a
#define SONIC_SR 0x28
/* test-only registers */
#define SONIC_TPS 0x08
#define SONIC_TFC 0x09
#define SONIC_TSA0 0x0a
#define SONIC_TSA1 0x0b
#define SONIC_TFS 0x0c
#define SONIC_CRBA0 0x0f
#define SONIC_CRBA1 0x10
#define SONIC_RBWC0 0x11
#define SONIC_RBWC1 0x12
#define SONIC_TTDA 0x20
#define SONIC_MDT 0x2f
#define SONIC_TRBA0 0x19
#define SONIC_TRBA1 0x1a
#define SONIC_TBWC0 0x1b
#define SONIC_TBWC1 0x1c
#define SONIC_LLFA 0x1f
#define SONIC_ADDR0 0x1d
#define SONIC_ADDR1 0x1e
/*
* Error counters
*/
#define SONIC_CRCT 0x2c
#define SONIC_FAET 0x2d
#define SONIC_MPT 0x2e
#define SONIC_DCR2 0x3f
/*
* SONIC command bits
*/
#define SONIC_CR_LCAM 0x0200
#define SONIC_CR_RRRA 0x0100
#define SONIC_CR_RST 0x0080
#define SONIC_CR_ST 0x0020
#define SONIC_CR_STP 0x0010
#define SONIC_CR_RXEN 0x0008
#define SONIC_CR_RXDIS 0x0004
#define SONIC_CR_TXP 0x0002
#define SONIC_CR_HTX 0x0001
/*
* SONIC data configuration bits
*/
#define SONIC_DCR_EXBUS 0x8000
#define SONIC_DCR_LBR 0x2000
#define SONIC_DCR_PO1 0x1000
#define SONIC_DCR_PO0 0x0800
#define SONIC_DCR_SBUS 0x0400
#define SONIC_DCR_USR1 0x0200
#define SONIC_DCR_USR0 0x0100
#define SONIC_DCR_WC1 0x0080
#define SONIC_DCR_WC0 0x0040
#define SONIC_DCR_DW 0x0020
#define SONIC_DCR_BMS 0x0010
#define SONIC_DCR_RFT1 0x0008
#define SONIC_DCR_RFT0 0x0004
#define SONIC_DCR_TFT1 0x0002
#define SONIC_DCR_TFT0 0x0001
/*
* Constants for the SONIC receive control register.
*/
#define SONIC_RCR_ERR 0x8000
#define SONIC_RCR_RNT 0x4000
#define SONIC_RCR_BRD 0x2000
#define SONIC_RCR_PRO 0x1000
#define SONIC_RCR_AMC 0x0800
#define SONIC_RCR_LB1 0x0400
#define SONIC_RCR_LB0 0x0200
#define SONIC_RCR_MC 0x0100
#define SONIC_RCR_BC 0x0080
#define SONIC_RCR_LPKT 0x0040
#define SONIC_RCR_CRS 0x0020
#define SONIC_RCR_COL 0x0010
#define SONIC_RCR_CRCR 0x0008
#define SONIC_RCR_FAER 0x0004
#define SONIC_RCR_LBK 0x0002
#define SONIC_RCR_PRX 0x0001
#define SONIC_RCR_LB_OFF 0
#define SONIC_RCR_LB_MAC SONIC_RCR_LB0
#define SONIC_RCR_LB_ENDEC SONIC_RCR_LB1
#define SONIC_RCR_LB_TRANS (SONIC_RCR_LB0 | SONIC_RCR_LB1)
/* default RCR setup */
#define SONIC_RCR_DEFAULT (SONIC_RCR_BRD)
/*
* SONIC Transmit Control register bits
*/
#define SONIC_TCR_PINTR 0x8000
#define SONIC_TCR_POWC 0x4000
#define SONIC_TCR_CRCI 0x2000
#define SONIC_TCR_EXDIS 0x1000
#define SONIC_TCR_EXD 0x0400
#define SONIC_TCR_DEF 0x0200
#define SONIC_TCR_NCRS 0x0100
#define SONIC_TCR_CRLS 0x0080
#define SONIC_TCR_EXC 0x0040
#define SONIC_TCR_PMB 0x0008
#define SONIC_TCR_FU 0x0004
#define SONIC_TCR_BCM 0x0002
#define SONIC_TCR_PTX 0x0001
#define SONIC_TCR_DEFAULT 0x0000
/*
* Constants for the SONIC_INTERRUPT_MASK and
* SONIC_INTERRUPT_STATUS registers.
*/
#define SONIC_INT_BR 0x4000
#define SONIC_INT_HBL 0x2000
#define SONIC_INT_LCD 0x1000
#define SONIC_INT_PINT 0x0800
#define SONIC_INT_PKTRX 0x0400
#define SONIC_INT_TXDN 0x0200
#define SONIC_INT_TXER 0x0100
#define SONIC_INT_TC 0x0080
#define SONIC_INT_RDE 0x0040
#define SONIC_INT_RBE 0x0020
#define SONIC_INT_RBAE 0x0010
#define SONIC_INT_CRC 0x0008
#define SONIC_INT_FAE 0x0004
#define SONIC_INT_MP 0x0002
#define SONIC_INT_RFO 0x0001
/*
* The interrupts we allow.
*/
#define SONIC_IMR_DEFAULT ( SONIC_INT_BR | \
SONIC_INT_LCD | \
SONIC_INT_RFO | \
SONIC_INT_PKTRX | \
SONIC_INT_TXDN | \
SONIC_INT_TXER | \
SONIC_INT_RDE | \
SONIC_INT_RBAE | \
SONIC_INT_CRC | \
SONIC_INT_FAE | \
SONIC_INT_MP)
#define SONIC_EOL 0x0001
#define CAM_DESCRIPTORS 16
/* Offsets in the various DMA buffers accessed by the SONIC */
#define SONIC_BITMODE16 0
#define SONIC_BITMODE32 1
#define SONIC_BUS_SCALE(bitmode) ((bitmode) ? 4 : 2)
/* Note! These are all measured in bus-size units, so use SONIC_BUS_SCALE */
#define SIZEOF_SONIC_RR 4
#define SONIC_RR_BUFADR_L 0
#define SONIC_RR_BUFADR_H 1
#define SONIC_RR_BUFSIZE_L 2
#define SONIC_RR_BUFSIZE_H 3
#define SIZEOF_SONIC_RD 7
#define SONIC_RD_STATUS 0
#define SONIC_RD_PKTLEN 1
#define SONIC_RD_PKTPTR_L 2
#define SONIC_RD_PKTPTR_H 3
#define SONIC_RD_SEQNO 4
#define SONIC_RD_LINK 5
#define SONIC_RD_IN_USE 6
#define SIZEOF_SONIC_TD 8
#define SONIC_TD_STATUS 0
#define SONIC_TD_CONFIG 1
#define SONIC_TD_PKTSIZE 2
#define SONIC_TD_FRAG_COUNT 3
#define SONIC_TD_FRAG_PTR_L 4
#define SONIC_TD_FRAG_PTR_H 5
#define SONIC_TD_FRAG_SIZE 6
#define SONIC_TD_LINK 7
#define SIZEOF_SONIC_CD 4
#define SONIC_CD_ENTRY_POINTER 0
#define SONIC_CD_CAP0 1
#define SONIC_CD_CAP1 2
#define SONIC_CD_CAP2 3
#define SIZEOF_SONIC_CDA ((CAM_DESCRIPTORS * SIZEOF_SONIC_CD) + 1)
#define SONIC_CDA_CAM_ENABLE (CAM_DESCRIPTORS * SIZEOF_SONIC_CD)
/*
* Some tunables for the buffer areas. Power of 2 is required
* the current driver uses one receive buffer for each descriptor.
*
* MSch: use more buffer space for the slow m68k Macs!
*/
#define SONIC_NUM_RRS 16 /* number of receive resources */
#define SONIC_NUM_RDS SONIC_NUM_RRS /* number of receive descriptors */
#define SONIC_NUM_TDS 16 /* number of transmit descriptors */
#define SONIC_RDS_MASK (SONIC_NUM_RDS-1)
#define SONIC_TDS_MASK (SONIC_NUM_TDS-1)
#define SONIC_RBSIZE 1520 /* size of one resource buffer */
/* Again, measured in bus size units! */
#define SIZEOF_SONIC_DESC (SIZEOF_SONIC_CDA \
+ (SIZEOF_SONIC_TD * SONIC_NUM_TDS) \
+ (SIZEOF_SONIC_RD * SONIC_NUM_RDS) \
+ (SIZEOF_SONIC_RR * SONIC_NUM_RRS))
/* Information that need to be kept for each board. */
struct sonic_local {
/* Bus size. 0 == 16 bits, 1 == 32 bits. */
int dma_bitmode;
/* Register offset within the longword (independent of endianness,
and varies from one type of Macintosh SONIC to another
(Aarrgh)) */
int reg_offset;
void *descriptors;
/* Crud. These areas have to be within the same 64K. Therefore
we allocate a desriptors page, and point these to places within it. */
void *cda; /* CAM descriptor area */
void *tda; /* Transmit descriptor area */
void *rra; /* Receive resource area */
void *rda; /* Receive descriptor area */
struct sk_buff* volatile rx_skb[SONIC_NUM_RRS]; /* packets to be received */
struct sk_buff* volatile tx_skb[SONIC_NUM_TDS]; /* packets to be transmitted */
unsigned int tx_len[SONIC_NUM_TDS]; /* lengths of tx DMA mappings */
/* Logical DMA addresses on MIPS, bus addresses on m68k
* (so "laddr" is a bit misleading) */
dma_addr_t descriptors_laddr;
u32 cda_laddr; /* logical DMA address of CDA */
u32 tda_laddr; /* logical DMA address of TDA */
u32 rra_laddr; /* logical DMA address of RRA */
u32 rda_laddr; /* logical DMA address of RDA */
dma_addr_t rx_laddr[SONIC_NUM_RRS]; /* logical DMA addresses of rx skbuffs */
dma_addr_t tx_laddr[SONIC_NUM_TDS]; /* logical DMA addresses of tx skbuffs */
unsigned int rra_end;
unsigned int cur_rwp;
unsigned int cur_rx;
unsigned int cur_tx; /* first unacked transmit packet */
unsigned int eol_rx;
unsigned int eol_tx; /* last unacked transmit packet */
unsigned int next_tx; /* next free TD */
struct device *device; /* generic device */
struct net_device_stats stats;
};
#define TX_TIMEOUT (3 * HZ)
/* Index to functions, as function prototypes. */
static int sonic_open(struct net_device *dev);
static int sonic_send_packet(struct sk_buff *skb, struct net_device *dev);
static irqreturn_t sonic_interrupt(int irq, void *dev_id, struct pt_regs *regs);
static void sonic_rx(struct net_device *dev);
static int sonic_close(struct net_device *dev);
static struct net_device_stats *sonic_get_stats(struct net_device *dev);
static void sonic_multicast_list(struct net_device *dev);
static int sonic_init(struct net_device *dev);
static void sonic_tx_timeout(struct net_device *dev);
/* Internal inlines for reading/writing DMA buffers. Note that bus
size and endianness matter here, whereas they don't for registers,
as far as we can tell. */
/* OpenBSD calls this "SWO". I'd like to think that sonic_buf_put()
is a much better name. */
static inline void sonic_buf_put(void* base, int bitmode,
int offset, __u16 val)
{
if (bitmode)
#ifdef __BIG_ENDIAN
((__u16 *) base + (offset*2))[1] = val;
#else
((__u16 *) base + (offset*2))[0] = val;
#endif
else
((__u16 *) base)[offset] = val;
}
static inline __u16 sonic_buf_get(void* base, int bitmode,
int offset)
{
if (bitmode)
#ifdef __BIG_ENDIAN
return ((volatile __u16 *) base + (offset*2))[1];
#else
return ((volatile __u16 *) base + (offset*2))[0];
#endif
else
return ((volatile __u16 *) base)[offset];
}
/* Inlines that you should actually use for reading/writing DMA buffers */
static inline void sonic_cda_put(struct net_device* dev, int entry,
int offset, __u16 val)
{
struct sonic_local* lp = (struct sonic_local *) dev->priv;
sonic_buf_put(lp->cda, lp->dma_bitmode,
(entry * SIZEOF_SONIC_CD) + offset, val);
}
static inline __u16 sonic_cda_get(struct net_device* dev, int entry,
int offset)
{
struct sonic_local* lp = (struct sonic_local *) dev->priv;
return sonic_buf_get(lp->cda, lp->dma_bitmode,
(entry * SIZEOF_SONIC_CD) + offset);
}
static inline void sonic_set_cam_enable(struct net_device* dev, __u16 val)
{
struct sonic_local* lp = (struct sonic_local *) dev->priv;
sonic_buf_put(lp->cda, lp->dma_bitmode, SONIC_CDA_CAM_ENABLE, val);
}
static inline __u16 sonic_get_cam_enable(struct net_device* dev)
{
struct sonic_local* lp = (struct sonic_local *) dev->priv;
return sonic_buf_get(lp->cda, lp->dma_bitmode, SONIC_CDA_CAM_ENABLE);
}
static inline void sonic_tda_put(struct net_device* dev, int entry,
int offset, __u16 val)
{
struct sonic_local* lp = (struct sonic_local *) dev->priv;
sonic_buf_put(lp->tda, lp->dma_bitmode,
(entry * SIZEOF_SONIC_TD) + offset, val);
}
static inline __u16 sonic_tda_get(struct net_device* dev, int entry,
int offset)
{
struct sonic_local* lp = (struct sonic_local *) dev->priv;
return sonic_buf_get(lp->tda, lp->dma_bitmode,
(entry * SIZEOF_SONIC_TD) + offset);
}
static inline void sonic_rda_put(struct net_device* dev, int entry,
int offset, __u16 val)
{
struct sonic_local* lp = (struct sonic_local *) dev->priv;
sonic_buf_put(lp->rda, lp->dma_bitmode,
(entry * SIZEOF_SONIC_RD) + offset, val);
}
static inline __u16 sonic_rda_get(struct net_device* dev, int entry,
int offset)
{
struct sonic_local* lp = (struct sonic_local *) dev->priv;
return sonic_buf_get(lp->rda, lp->dma_bitmode,
(entry * SIZEOF_SONIC_RD) + offset);
}
static inline void sonic_rra_put(struct net_device* dev, int entry,
int offset, __u16 val)
{
struct sonic_local* lp = (struct sonic_local *) dev->priv;
sonic_buf_put(lp->rra, lp->dma_bitmode,
(entry * SIZEOF_SONIC_RR) + offset, val);
}
static inline __u16 sonic_rra_get(struct net_device* dev, int entry,
int offset)
{
struct sonic_local* lp = (struct sonic_local *) dev->priv;
return sonic_buf_get(lp->rra, lp->dma_bitmode,
(entry * SIZEOF_SONIC_RR) + offset);
}
static const char *version =
"sonic.c:v0.92 20.9.98 tsbogend@alpha.franken.de\n";
#endif /* SONIC_H */
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