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kernel-fxtec-pro1x/drivers/net/tokenring/tms380tr.h
David Howells 7d12e780e0 IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.

The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around.  On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).

Where appropriate, an arch may override the generic storage facility and do
something different with the variable.  On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.

Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions.  Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller.  A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.

I've build this code with allyesconfig for x86_64 and i386.  I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.

This will affect all archs.  Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:

	struct pt_regs *old_regs = set_irq_regs(regs);

And put the old one back at the end:

	set_irq_regs(old_regs);

Don't pass regs through to generic_handle_irq() or __do_IRQ().

In timer_interrupt(), this sort of change will be necessary:

	-	update_process_times(user_mode(regs));
	-	profile_tick(CPU_PROFILING, regs);
	+	update_process_times(user_mode(get_irq_regs()));
	+	profile_tick(CPU_PROFILING);

I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().

Some notes on the interrupt handling in the drivers:

 (*) input_dev() is now gone entirely.  The regs pointer is no longer stored in
     the input_dev struct.

 (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking.  It does
     something different depending on whether it's been supplied with a regs
     pointer or not.

 (*) Various IRQ handler function pointers have been moved to type
     irq_handler_t.

Signed-Off-By: David Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 15:10:12 +01:00

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/*
* tms380tr.h: TI TMS380 Token Ring driver for Linux
*
* Authors:
* - Christoph Goos <cgoos@syskonnect.de>
* - Adam Fritzler <mid@auk.cx>
*/
#ifndef __LINUX_TMS380TR_H
#define __LINUX_TMS380TR_H
#ifdef __KERNEL__
#include <linux/interrupt.h>
/* module prototypes */
int tms380tr_open(struct net_device *dev);
int tms380tr_close(struct net_device *dev);
irqreturn_t tms380tr_interrupt(int irq, void *dev_id);
int tmsdev_init(struct net_device *dev, struct device *pdev);
void tmsdev_term(struct net_device *dev);
void tms380tr_wait(unsigned long time);
#define TMS380TR_MAX_ADAPTERS 7
#define SEND_TIMEOUT 10*HZ
#define TR_RCF_LONGEST_FRAME_MASK 0x0070
#define TR_RCF_FRAME4K 0x0030
/*------------------------------------------------------------------*/
/* Bit order for adapter communication with DMA */
/* -------------------------------------------------------------- */
/* Bit 8 | 9| 10| 11|| 12| 13| 14| 15|| 0| 1| 2| 3|| 4| 5| 6| 7| */
/* -------------------------------------------------------------- */
/* The bytes in a word must be byte swapped. Also, if a double */
/* word is used for storage, then the words, as well as the bytes, */
/* must be swapped. */
/* Bit order for adapter communication with DIO */
/* -------------------------------------------------------------- */
/* Bit 0 | 1| 2| 3|| 4| 5| 6| 7|| 8| 9| 10| 11|| 12| 13| 14| 15| */
/* -------------------------------------------------------------- */
/*------------------------------------------------------------------*/
/* Swap words of a long. */
#define SWAPW(x) (((x) << 16) | ((x) >> 16))
/* Get the low byte of a word. */
#define LOBYTE(w) ((unsigned char)(w))
/* Get the high byte of a word. */
#define HIBYTE(w) ((unsigned char)((unsigned short)(w) >> 8))
/* Get the low word of a long. */
#define LOWORD(l) ((unsigned short)(l))
/* Get the high word of a long. */
#define HIWORD(l) ((unsigned short)((unsigned long)(l) >> 16))
/* Token ring adapter I/O addresses for normal mode. */
/*
* The SIF registers. Common to all adapters.
*/
/* Basic SIF (SRSX = 0) */
#define SIFDAT 0x00 /* SIF/DMA data. */
#define SIFINC 0x02 /* IO Word data with auto increment. */
#define SIFINH 0x03 /* IO Byte data with auto increment. */
#define SIFADR 0x04 /* SIF/DMA Address. */
#define SIFCMD 0x06 /* SIF Command. */
#define SIFSTS 0x06 /* SIF Status. */
/* "Extended" SIF (SRSX = 1) */
#define SIFACL 0x08 /* SIF Adapter Control Register. */
#define SIFADD 0x0a /* SIF/DMA Address. -- 0x0a */
#define SIFADX 0x0c /* 0x0c */
#define DMALEN 0x0e /* SIF DMA length. -- 0x0e */
/*
* POS Registers. Only for ISA Adapters.
*/
#define POSREG 0x10 /* Adapter Program Option Select (POS)
* Register: base IO address + 16 byte.
*/
#define POSREG_2 24L /* only for TR4/16+ adapter
* base IO address + 24 byte. -- 0x18
*/
/* SIFCMD command codes (high-low) */
#define CMD_INTERRUPT_ADAPTER 0x8000 /* Cause internal adapter interrupt */
#define CMD_ADAPTER_RESET 0x4000 /* Hardware reset of adapter */
#define CMD_SSB_CLEAR 0x2000 /* Acknowledge to adapter to
* system interrupts.
*/
#define CMD_EXECUTE 0x1000 /* Execute SCB command */
#define CMD_SCB_REQUEST 0x0800 /* Request adapter to interrupt
* system when SCB is available for
* another command.
*/
#define CMD_RX_CONTINUE 0x0400 /* Continue receive after odd pointer
* stop. (odd pointer receive method)
*/
#define CMD_RX_VALID 0x0200 /* Now actual RPL is valid. */
#define CMD_TX_VALID 0x0100 /* Now actual TPL is valid. (valid
* bit receive/transmit method)
*/
#define CMD_SYSTEM_IRQ 0x0080 /* Adapter-to-attached-system
* interrupt is reset.
*/
#define CMD_CLEAR_SYSTEM_IRQ 0x0080 /* Clear SYSTEM_INTERRUPT bit.
* (write: 1=ignore, 0=reset)
*/
#define EXEC_SOFT_RESET 0xFF00 /* adapter soft reset. (restart
* adapter after hardware reset)
*/
/* ACL commands (high-low) */
#define ACL_SWHLDA 0x0800 /* Software hold acknowledge. */
#define ACL_SWDDIR 0x0400 /* Data transfer direction. */
#define ACL_SWHRQ 0x0200 /* Pseudo DMA operation. */
#define ACL_PSDMAEN 0x0100 /* Enable pseudo system DMA. */
#define ACL_ARESET 0x0080 /* Adapter hardware reset command.
* (held in reset condition as
* long as bit is set)
*/
#define ACL_CPHALT 0x0040 /* Communication processor halt.
* (can only be set while ACL_ARESET
* bit is set; prevents adapter
* processor from executing code while
* downloading firmware)
*/
#define ACL_BOOT 0x0020
#define ACL_SINTEN 0x0008 /* System interrupt enable/disable
* (1/0): can be written if ACL_ARESET
* is zero.
*/
#define ACL_PEN 0x0004
#define ACL_NSELOUT0 0x0002
#define ACL_NSELOUT1 0x0001 /* NSELOUTx have a card-specific
* meaning for setting ring speed.
*/
#define PS_DMA_MASK (ACL_SWHRQ | ACL_PSDMAEN)
/* SIFSTS register return codes (high-low) */
#define STS_SYSTEM_IRQ 0x0080 /* Adapter-to-attached-system
* interrupt is valid.
*/
#define STS_INITIALIZE 0x0040 /* INITIALIZE status. (ready to
* initialize)
*/
#define STS_TEST 0x0020 /* TEST status. (BUD not completed) */
#define STS_ERROR 0x0010 /* ERROR status. (unrecoverable
* HW error occurred)
*/
#define STS_MASK 0x00F0 /* Mask interesting status bits. */
#define STS_ERROR_MASK 0x000F /* Get Error Code by masking the
* interrupt code bits.
*/
#define ADAPTER_INT_PTRS 0x0A00 /* Address offset of adapter internal
* pointers 01:0a00 (high-low) have to
* be read after init and before open.
*/
/* Interrupt Codes (only MAC IRQs) */
#define STS_IRQ_ADAPTER_CHECK 0x0000 /* unrecoverable hardware or
* software error.
*/
#define STS_IRQ_RING_STATUS 0x0004 /* SSB is updated with ring status. */
#define STS_IRQ_LLC_STATUS 0x0005 /* Not used in MAC-only microcode */
#define STS_IRQ_SCB_CLEAR 0x0006 /* SCB clear, following an
* SCB_REQUEST IRQ.
*/
#define STS_IRQ_TIMER 0x0007 /* Not normally used in MAC ucode */
#define STS_IRQ_COMMAND_STATUS 0x0008 /* SSB is updated with command
* status.
*/
#define STS_IRQ_RECEIVE_STATUS 0x000A /* SSB is updated with receive
* status.
*/
#define STS_IRQ_TRANSMIT_STATUS 0x000C /* SSB is updated with transmit
* status
*/
#define STS_IRQ_RECEIVE_PENDING 0x000E /* Not used in MAC-only microcode */
#define STS_IRQ_MASK 0x000F /* = STS_ERROR_MASK. */
/* TRANSMIT_STATUS completion code: (SSB.Parm[0]) */
#define COMMAND_COMPLETE 0x0080 /* TRANSMIT command completed
* (avoid this!) issue another transmit
* to send additional frames.
*/
#define FRAME_COMPLETE 0x0040 /* Frame has been transmitted;
* INTERRUPT_FRAME bit was set in the
* CSTAT request; indication of possibly
* more than one frame transmissions!
* SSB.Parm[0-1]: 32 bit pointer to
* TPL of last frame.
*/
#define LIST_ERROR 0x0020 /* Error in one of the TPLs that
* compose the frame; TRANSMIT
* terminated; Parm[1-2]: 32bit pointer
* to TPL which starts the error
* frame; error details in bits 8-13.
* (14?)
*/
#define FRAME_SIZE_ERROR 0x8000 /* FRAME_SIZE does not equal the sum of
* the valid DATA_COUNT fields;
* FRAME_SIZE less than header plus
* information field. (15 bytes +
* routing field) Or if FRAME_SIZE
* was specified as zero in one list.
*/
#define TX_THRESHOLD 0x4000 /* FRAME_SIZE greater than (BUFFER_SIZE
* - 9) * TX_BUF_MAX.
*/
#define ODD_ADDRESS 0x2000 /* Odd forward pointer value is
* read on a list without END_FRAME
* indication.
*/
#define FRAME_ERROR 0x1000 /* START_FRAME bit (not) anticipated,
* but (not) set.
*/
#define ACCESS_PRIORITY_ERROR 0x0800 /* Access priority requested has not
* been allowed.
*/
#define UNENABLED_MAC_FRAME 0x0400 /* MAC frame has source class of zero
* or MAC frame PCF ATTN field is
* greater than one.
*/
#define ILLEGAL_FRAME_FORMAT 0x0200 /* Bit 0 or FC field was set to one. */
/*
* Since we need to support some functions even if the adapter is in a
* CLOSED state, we have a (pseudo-) command queue which holds commands
* that are outstandig to be executed.
*
* Each time a command completes, an interrupt occurs and the next
* command is executed. The command queue is actually a simple word with
* a bit for each outstandig command. Therefore the commands will not be
* executed in the order they have been queued.
*
* The following defines the command code bits and the command queue:
*/
#define OC_OPEN 0x0001 /* OPEN command */
#define OC_TRANSMIT 0x0002 /* TRANSMIT command */
#define OC_TRANSMIT_HALT 0x0004 /* TRANSMIT_HALT command */
#define OC_RECEIVE 0x0008 /* RECEIVE command */
#define OC_CLOSE 0x0010 /* CLOSE command */
#define OC_SET_GROUP_ADDR 0x0020 /* SET_GROUP_ADDR command */
#define OC_SET_FUNCT_ADDR 0x0040 /* SET_FUNCT_ADDR command */
#define OC_READ_ERROR_LOG 0x0080 /* READ_ERROR_LOG command */
#define OC_READ_ADAPTER 0x0100 /* READ_ADAPTER command */
#define OC_MODIFY_OPEN_PARMS 0x0400 /* MODIFY_OPEN_PARMS command */
#define OC_RESTORE_OPEN_PARMS 0x0800 /* RESTORE_OPEN_PARMS command */
#define OC_SET_FIRST_16_GROUP 0x1000 /* SET_FIRST_16_GROUP command */
#define OC_SET_BRIDGE_PARMS 0x2000 /* SET_BRIDGE_PARMS command */
#define OC_CONFIG_BRIDGE_PARMS 0x4000 /* CONFIG_BRIDGE_PARMS command */
#define OPEN 0x0300 /* C: open command. S: completion. */
#define TRANSMIT 0x0400 /* C: transmit command. S: completion
* status. (reject: COMMAND_REJECT if
* adapter not opened, TRANSMIT already
* issued or address passed in the SCB
* not word aligned)
*/
#define TRANSMIT_HALT 0x0500 /* C: interrupt TX TPL chain; if no
* TRANSMIT command issued, the command
* is ignored (completion with TRANSMIT
* status (0x0400)!)
*/
#define RECEIVE 0x0600 /* C: receive command. S: completion
* status. (reject: COMMAND_REJECT if
* adapter not opened, RECEIVE already
* issued or address passed in the SCB
* not word aligned)
*/
#define CLOSE 0x0700 /* C: close adapter. S: completion.
* (COMMAND_REJECT if adapter not open)
*/
#define SET_GROUP_ADDR 0x0800 /* C: alter adapter group address after
* OPEN. S: completion. (COMMAND_REJECT
* if adapter not open)
*/
#define SET_FUNCT_ADDR 0x0900 /* C: alter adapter functional address
* after OPEN. S: completion.
* (COMMAND_REJECT if adapter not open)
*/
#define READ_ERROR_LOG 0x0A00 /* C: read adapter error counters.
* S: completion. (command ignored
* if adapter not open!)
*/
#define READ_ADAPTER 0x0B00 /* C: read data from adapter memory.
* (important: after init and before
* open!) S: completion. (ADAPTER_CHECK
* interrupt if undefined storage area
* read)
*/
#define MODIFY_OPEN_PARMS 0x0D00 /* C: modify some adapter operational
* parameters. (bit correspondend to
* WRAP_INTERFACE is ignored)
* S: completion. (reject:
* COMMAND_REJECT)
*/
#define RESTORE_OPEN_PARMS 0x0E00 /* C: modify some adapter operational
* parameters. (bit correspondend
* to WRAP_INTERFACE is ignored)
* S: completion. (reject:
* COMMAND_REJECT)
*/
#define SET_FIRST_16_GROUP 0x0F00 /* C: alter the first two bytes in
* adapter group address.
* S: completion. (reject:
* COMMAND_REJECT)
*/
#define SET_BRIDGE_PARMS 0x1000 /* C: values and conditions for the
* adapter hardware to use when frames
* are copied for forwarding.
* S: completion. (reject:
* COMMAND_REJECT)
*/
#define CONFIG_BRIDGE_PARMS 0x1100 /* C: ..
* S: completion. (reject:
* COMMAND_REJECT)
*/
#define SPEED_4 4
#define SPEED_16 16 /* Default transmission speed */
/* Initialization Parameter Block (IPB); word alignment necessary! */
#define BURST_SIZE 0x0018 /* Default burst size */
#define BURST_MODE 0x9F00 /* Burst mode enable */
#define DMA_RETRIES 0x0505 /* Magic DMA retry number... */
#define CYCLE_TIME 3 /* Default AT-bus cycle time: 500 ns
* (later adapter version: fix cycle time!)
*/
#define LINE_SPEED_BIT 0x80
/* Macro definition for the wait function. */
#define ONE_SECOND_TICKS 1000000
#define HALF_SECOND (ONE_SECOND_TICKS / 2)
#define ONE_SECOND (ONE_SECOND_TICKS)
#define TWO_SECONDS (ONE_SECOND_TICKS * 2)
#define THREE_SECONDS (ONE_SECOND_TICKS * 3)
#define FOUR_SECONDS (ONE_SECOND_TICKS * 4)
#define FIVE_SECONDS (ONE_SECOND_TICKS * 5)
#define BUFFER_SIZE 2048 /* Buffers on Adapter */
#pragma pack(1)
typedef struct {
unsigned short Init_Options; /* Initialize with burst mode;
* LLC disabled. (MAC only)
*/
/* Interrupt vectors the adapter places on attached system bus. */
u_int8_t CMD_Status_IV; /* Interrupt vector: command status. */
u_int8_t TX_IV; /* Interrupt vector: transmit. */
u_int8_t RX_IV; /* Interrupt vector: receive. */
u_int8_t Ring_Status_IV; /* Interrupt vector: ring status. */
u_int8_t SCB_Clear_IV; /* Interrupt vector: SCB clear. */
u_int8_t Adapter_CHK_IV; /* Interrupt vector: adapter check. */
u_int16_t RX_Burst_Size; /* Max. number of transfer cycles. */
u_int16_t TX_Burst_Size; /* During DMA burst; even value! */
u_int16_t DMA_Abort_Thrhld; /* Number of DMA retries. */
u_int32_t SCB_Addr; /* SCB address: even, word aligned, high-low */
u_int32_t SSB_Addr; /* SSB address: even, word aligned, high-low */
} IPB, *IPB_Ptr;
#pragma pack()
/*
* OPEN Command Parameter List (OCPL) (can be reused, if the adapter has to
* be reopened)
*/
#define BUFFER_SIZE 2048 /* Buffers on Adapter. */
#define TPL_SIZE 8+6*TX_FRAG_NUM /* Depending on fragments per TPL. */
#define RPL_SIZE 14 /* (with TI firmware v2.26 handling
* up to nine fragments possible)
*/
#define TX_BUF_MIN 20 /* ??? (Stephan: calculation with */
#define TX_BUF_MAX 40 /* BUFFER_SIZE and MAX_FRAME_SIZE) ???
*/
#define DISABLE_EARLY_TOKEN_RELEASE 0x1000
/* OPEN Options (high-low) */
#define WRAP_INTERFACE 0x0080 /* Inserting omitted for test
* purposes; transmit data appears
* as receive data. (useful for
* testing; change: CLOSE necessary)
*/
#define DISABLE_HARD_ERROR 0x0040 /* On HARD_ERROR & TRANSMIT_BEACON
* no RING.STATUS interrupt.
*/
#define DISABLE_SOFT_ERROR 0x0020 /* On SOFT_ERROR, no RING.STATUS
* interrupt.
*/
#define PASS_ADAPTER_MAC_FRAMES 0x0010 /* Passing unsupported MAC frames
* to system.
*/
#define PASS_ATTENTION_FRAMES 0x0008 /* All changed attention MAC frames are
* passed to the system.
*/
#define PAD_ROUTING_FIELD 0x0004 /* Routing field is padded to 18
* bytes.
*/
#define FRAME_HOLD 0x0002 /*Adapter waits for entire frame before
* initiating DMA transfer; otherwise:
* DMA transfer initiation if internal
* buffer filled.
*/
#define CONTENDER 0x0001 /* Adapter participates in the monitor
* contention process.
*/
#define PASS_BEACON_MAC_FRAMES 0x8000 /* Adapter passes beacon MAC frames
* to the system.
*/
#define EARLY_TOKEN_RELEASE 0x1000 /* Only valid in 16 Mbps operation;
* 0 = ETR. (no effect in 4 Mbps
* operation)
*/
#define COPY_ALL_MAC_FRAMES 0x0400 /* All MAC frames are copied to
* the system. (after OPEN: duplicate
* address test (DAT) MAC frame is
* first received frame copied to the
* system)
*/
#define COPY_ALL_NON_MAC_FRAMES 0x0200 /* All non MAC frames are copied to
* the system.
*/
#define PASS_FIRST_BUF_ONLY 0x0100 /* Passes only first internal buffer
* of each received frame; FrameSize
* of RPLs must contain internal
* BUFFER_SIZE bits for promiscous mode.
*/
#define ENABLE_FULL_DUPLEX_SELECTION 0x2000
/* Enable the use of full-duplex
* settings with bits in byte 22 in
* ocpl. (new feature in firmware
* version 3.09)
*/
/* Full-duplex settings */
#define OPEN_FULL_DUPLEX_OFF 0x0000
#define OPEN_FULL_DUPLEX_ON 0x00c0
#define OPEN_FULL_DUPLEX_AUTO 0x0080
#define PROD_ID_SIZE 18 /* Length of product ID. */
#define TX_FRAG_NUM 3 /* Number of fragments used in one TPL. */
#define TX_MORE_FRAGMENTS 0x8000 /* Bit set in DataCount to indicate more
* fragments following.
*/
/* XXX is there some better way to do this? */
#define ISA_MAX_ADDRESS 0x00ffffff
#define PCI_MAX_ADDRESS 0xffffffff
#pragma pack(1)
typedef struct {
u_int16_t OPENOptions;
u_int8_t NodeAddr[6]; /* Adapter node address; use ROM
* address
*/
u_int32_t GroupAddr; /* Multicast: high order
* bytes = 0xC000
*/
u_int32_t FunctAddr; /* High order bytes = 0xC000 */
u_int16_t RxListSize; /* RPL size: 0 (=26), 14, 20 or
* 26 bytes read by the adapter.
* (Depending on the number of
* fragments/list)
*/
u_int16_t TxListSize; /* TPL size */
u_int16_t BufSize; /* Is automatically rounded up to the
* nearest nK boundary.
*/
u_int16_t FullDuplex;
u_int16_t Reserved;
u_int8_t TXBufMin; /* Number of adapter buffers reserved
* for transmission a minimum of 2
* buffers must be allocated.
*/
u_int8_t TXBufMax; /* Maximum number of adapter buffers
* for transmit; a minimum of 2 buffers
* must be available for receive.
* Default: 6
*/
u_int16_t ProdIDAddr[2];/* Pointer to product ID. */
} OPB, *OPB_Ptr;
#pragma pack()
/*
* SCB: adapter commands enabled by the host system started by writing
* CMD_INTERRUPT_ADAPTER | CMD_EXECUTE (|SCB_REQUEST) to the SIFCMD IO
* register. (special case: | CMD_SYSTEM_IRQ for initialization)
*/
#pragma pack(1)
typedef struct {
u_int16_t CMD; /* Command code */
u_int16_t Parm[2]; /* Pointer to Command Parameter Block */
} SCB; /* System Command Block (32 bit physical address; big endian)*/
#pragma pack()
/*
* SSB: adapter command return status can be evaluated after COMMAND_STATUS
* adapter to system interrupt after reading SSB, the availability of the SSB
* has to be told the adapter by writing CMD_INTERRUPT_ADAPTER | CMD_SSB_CLEAR
* in the SIFCMD IO register.
*/
#pragma pack(1)
typedef struct {
u_int16_t STS; /* Status code */
u_int16_t Parm[3]; /* Parameter or pointer to Status Parameter
* Block.
*/
} SSB; /* System Status Block (big endian - physical address) */
#pragma pack()
typedef struct {
unsigned short BurnedInAddrPtr; /* Pointer to adapter burned in
* address. (BIA)
*/
unsigned short SoftwareLevelPtr;/* Pointer to software level data. */
unsigned short AdapterAddrPtr; /* Pointer to adapter addresses. */
unsigned short AdapterParmsPtr; /* Pointer to adapter parameters. */
unsigned short MACBufferPtr; /* Pointer to MAC buffer. (internal) */
unsigned short LLCCountersPtr; /* Pointer to LLC counters. */
unsigned short SpeedFlagPtr; /* Pointer to data rate flag.
* (4/16 Mbps)
*/
unsigned short AdapterRAMPtr; /* Pointer to adapter RAM found. (KB) */
} INTPTRS; /* Adapter internal pointers */
#pragma pack(1)
typedef struct {
u_int8_t Line_Error; /* Line error: code violation in
* frame or in a token, or FCS error.
*/
u_int8_t Internal_Error; /* IBM specific. (Reserved_1) */
u_int8_t Burst_Error;
u_int8_t ARI_FCI_Error; /* ARI/FCI bit zero in AMP or
* SMP MAC frame.
*/
u_int8_t AbortDelimeters; /* IBM specific. (Reserved_2) */
u_int8_t Reserved_3;
u_int8_t Lost_Frame_Error; /* Receive of end of transmitted
* frame failed.
*/
u_int8_t Rx_Congest_Error; /* Adapter in repeat mode has not
* enough buffer space to copy incoming
* frame.
*/
u_int8_t Frame_Copied_Error; /* ARI bit not zero in frame
* addressed to adapter.
*/
u_int8_t Frequency_Error; /* IBM specific. (Reserved_4) */
u_int8_t Token_Error; /* (active only in monitor station) */
u_int8_t Reserved_5;
u_int8_t DMA_Bus_Error; /* DMA bus errors not exceeding the
* abort thresholds.
*/
u_int8_t DMA_Parity_Error; /* DMA parity errors not exceeding
* the abort thresholds.
*/
} ERRORTAB; /* Adapter error counters */
#pragma pack()
/*--------------------- Send and Receive definitions -------------------*/
#pragma pack(1)
typedef struct {
u_int16_t DataCount; /* Value 0, even and odd values are
* permitted; value is unaltered most
* significant bit set: following
* fragments last fragment: most
* significant bit is not evaluated.
* (???)
*/
u_int32_t DataAddr; /* Pointer to frame data fragment;
* even or odd.
*/
} Fragment;
#pragma pack()
#define MAX_FRAG_NUMBERS 9 /* Maximal number of fragments possible to use
* in one RPL/TPL. (depending on TI firmware
* version)
*/
/*
* AC (1), FC (1), Dst (6), Src (6), RIF (18), Data (4472) = 4504
* The packet size can be one of the follows: 548, 1502, 2084, 4504, 8176,
* 11439, 17832. Refer to TMS380 Second Generation Token Ring User's Guide
* Page 2-27.
*/
#define HEADER_SIZE (1 + 1 + 6 + 6)
#define SRC_SIZE 18
#define MIN_DATA_SIZE 516
#define DEFAULT_DATA_SIZE 4472
#define MAX_DATA_SIZE 17800
#define DEFAULT_PACKET_SIZE (HEADER_SIZE + SRC_SIZE + DEFAULT_DATA_SIZE)
#define MIN_PACKET_SIZE (HEADER_SIZE + SRC_SIZE + MIN_DATA_SIZE)
#define MAX_PACKET_SIZE (HEADER_SIZE + SRC_SIZE + MAX_DATA_SIZE)
/*
* Macros to deal with the frame status field.
*/
#define AC_NOT_RECOGNIZED 0x00
#define GROUP_BIT 0x80
#define GET_TRANSMIT_STATUS_HIGH_BYTE(Ts) ((unsigned char)((Ts) >> 8))
#define GET_FRAME_STATUS_HIGH_AC(Fs) ((unsigned char)(((Fs) & 0xC0) >> 6))
#define GET_FRAME_STATUS_LOW_AC(Fs) ((unsigned char)(((Fs) & 0x0C) >> 2))
#define DIRECTED_FRAME(Context) (!((Context)->MData[2] & GROUP_BIT))
/*--------------------- Send Functions ---------------------------------*/
/* define TX_CSTAT _REQUEST (R) and _COMPLETE (C) values (high-low) */
#define TX_VALID 0x0080 /* R: set via TRANSMIT.VALID interrupt.
* C: always reset to zero!
*/
#define TX_FRAME_COMPLETE 0x0040 /* R: must be reset to zero.
* C: set to one.
*/
#define TX_START_FRAME 0x0020 /* R: start of a frame: 1
* C: unchanged.
*/
#define TX_END_FRAME 0x0010 /* R: end of a frame: 1
* C: unchanged.
*/
#define TX_FRAME_IRQ 0x0008 /* R: request interrupt generation
* after transmission.
* C: unchanged.
*/
#define TX_ERROR 0x0004 /* R: reserved.
* C: set to one if Error occurred.
*/
#define TX_INTERFRAME_WAIT 0x0004
#define TX_PASS_CRC 0x0002 /* R: set if CRC value is already
* calculated. (valid only in
* FRAME_START TPL)
* C: unchanged.
*/
#define TX_PASS_SRC_ADDR 0x0001 /* R: adapter uses explicit frame
* source address and does not overwrite
* with the adapter node address.
* (valid only in FRAME_START TPL)
*
* C: unchanged.
*/
#define TX_STRIP_FS 0xFF00 /* R: reserved.
* C: if no Transmission Error,
* field contains copy of FS byte after
* stripping of frame.
*/
/*
* Structure of Transmit Parameter Lists (TPLs) (only one frame every TPL,
* but possibly multiple TPLs for one frame) the length of the TPLs has to be
* initialized in the OPL. (OPEN parameter list)
*/
#define TPL_NUM 3 /* Number of Transmit Parameter Lists.
* !! MUST BE >= 3 !!
*/
#pragma pack(1)
typedef struct s_TPL TPL;
struct s_TPL { /* Transmit Parameter List (align on even word boundaries) */
u_int32_t NextTPLAddr; /* Pointer to next TPL in chain; if
* pointer is odd: this is the last
* TPL. Pointing to itself can cause
* problems!
*/
volatile u_int16_t Status; /* Initialized by the adapter:
* CSTAT_REQUEST important: update least
* significant bit first! Set by the
* adapter: CSTAT_COMPLETE status.
*/
u_int16_t FrameSize; /* Number of bytes to be transmitted
* as a frame including AC/FC,
* Destination, Source, Routing field
* not including CRC, FS, End Delimiter
* (valid only if START_FRAME bit in
* CSTAT nonzero) must not be zero in
* any list; maximum value: (BUFFER_SIZE
* - 8) * TX_BUF_MAX sum of DataCount
* values in FragmentList must equal
* Frame_Size value in START_FRAME TPL!
* frame data fragment list.
*/
/* TPL/RPL size in OPEN parameter list depending on maximal
* numbers of fragments used in one parameter list.
*/
Fragment FragList[TX_FRAG_NUM]; /* Maximum: nine frame fragments in one
* TPL actual version of firmware: 9
* fragments possible.
*/
#pragma pack()
/* Special proprietary data and precalculations */
TPL *NextTPLPtr; /* Pointer to next TPL in chain. */
unsigned char *MData;
struct sk_buff *Skb;
unsigned char TPLIndex;
volatile unsigned char BusyFlag;/* Flag: TPL busy? */
dma_addr_t DMABuff; /* DMA IO bus address from dma_map */
};
/* ---------------------Receive Functions-------------------------------*
* define RECEIVE_CSTAT_REQUEST (R) and RECEIVE_CSTAT_COMPLETE (C) values.
* (high-low)
*/
#define RX_VALID 0x0080 /* R: set; tell adapter with
* RECEIVE.VALID interrupt.
* C: reset to zero.
*/
#define RX_FRAME_COMPLETE 0x0040 /* R: must be reset to zero,
* C: set to one.
*/
#define RX_START_FRAME 0x0020 /* R: must be reset to zero.
* C: set to one on the list.
*/
#define RX_END_FRAME 0x0010 /* R: must be reset to zero.
* C: set to one on the list
* that ends the frame.
*/
#define RX_FRAME_IRQ 0x0008 /* R: request interrupt generation
* after receive.
* C: unchanged.
*/
#define RX_INTERFRAME_WAIT 0x0004 /* R: after receiving a frame:
* interrupt and wait for a
* RECEIVE.CONTINUE.
* C: unchanged.
*/
#define RX_PASS_CRC 0x0002 /* R: if set, the adapter includes
* the CRC in data passed. (last four
* bytes; valid only if FRAME_START is
* set)
* C: set, if CRC is included in
* received data.
*/
#define RX_PASS_SRC_ADDR 0x0001 /* R: adapter uses explicit frame
* source address and does not
* overwrite with the adapter node
* address. (valid only if FRAME_START
* is set)
* C: unchanged.
*/
#define RX_RECEIVE_FS 0xFC00 /* R: reserved; must be reset to zero.
* C: on lists with START_FRAME, field
* contains frame status field from
* received frame; otherwise cleared.
*/
#define RX_ADDR_MATCH 0x0300 /* R: reserved; must be reset to zero.
* C: address match code mask.
*/
#define RX_STATUS_MASK 0x00FF /* Mask for receive status bits. */
#define RX_INTERN_ADDR_MATCH 0x0100 /* C: internally address match. */
#define RX_EXTERN_ADDR_MATCH 0x0200 /* C: externally matched via
* XMATCH/XFAIL interface.
*/
#define RX_INTEXT_ADDR_MATCH 0x0300 /* C: internally and externally
* matched.
*/
#define RX_READY (RX_VALID | RX_FRAME_IRQ) /* Ready for receive. */
/* Constants for Command Status Interrupt.
* COMMAND_REJECT status field bit functions (SSB.Parm[0])
*/
#define ILLEGAL_COMMAND 0x0080 /* Set if an unknown command
* is issued to the adapter
*/
#define ADDRESS_ERROR 0x0040 /* Set if any address field in
* the SCB is odd. (not word aligned)
*/
#define ADAPTER_OPEN 0x0020 /* Command issued illegal with
* open adapter.
*/
#define ADAPTER_CLOSE 0x0010 /* Command issued illegal with
* closed adapter.
*/
#define SAME_COMMAND 0x0008 /* Command issued with same command
* already executing.
*/
/* OPEN_COMPLETION values (SSB.Parm[0], MSB) */
#define NODE_ADDR_ERROR 0x0040 /* Wrong address or BIA read
* zero address.
*/
#define LIST_SIZE_ERROR 0x0020 /* If List_Size value not in 0,
* 14, 20, 26.
*/
#define BUF_SIZE_ERROR 0x0010 /* Not enough available memory for
* two buffers.
*/
#define TX_BUF_COUNT_ERROR 0x0004 /* Remaining receive buffers less than
* two.
*/
#define OPEN_ERROR 0x0002 /* Error during ring insertion; more
* information in bits 8-15.
*/
/* Standard return codes */
#define GOOD_COMPLETION 0x0080 /* =OPEN_SUCCESSFULL */
#define INVALID_OPEN_OPTION 0x0001 /* OPEN options are not supported by
* the adapter.
*/
/* OPEN phases; details of OPEN_ERROR (SSB.Parm[0], LSB) */
#define OPEN_PHASES_MASK 0xF000 /* Check only the bits 8-11. */
#define LOBE_MEDIA_TEST 0x1000
#define PHYSICAL_INSERTION 0x2000
#define ADDRESS_VERIFICATION 0x3000
#define PARTICIPATION_IN_RING_POLL 0x4000
#define REQUEST_INITIALISATION 0x5000
#define FULLDUPLEX_CHECK 0x6000
/* OPEN error codes; details of OPEN_ERROR (SSB.Parm[0], LSB) */
#define OPEN_ERROR_CODES_MASK 0x0F00 /* Check only the bits 12-15. */
#define OPEN_FUNCTION_FAILURE 0x0100 /* Unable to transmit to itself or
* frames received before insertion.
*/
#define OPEN_SIGNAL_LOSS 0x0200 /* Signal loss condition detected at
* receiver.
*/
#define OPEN_TIMEOUT 0x0500 /* Insertion timer expired before
* logical insertion.
*/
#define OPEN_RING_FAILURE 0x0600 /* Unable to receive own ring purge
* MAC frames.
*/
#define OPEN_RING_BEACONING 0x0700 /* Beacon MAC frame received after
* ring insertion.
*/
#define OPEN_DUPLICATE_NODEADDR 0x0800 /* Other station in ring found
* with the same address.
*/
#define OPEN_REQUEST_INIT 0x0900 /* RPS present but does not respond. */
#define OPEN_REMOVE_RECEIVED 0x0A00 /* Adapter received a remove adapter
* MAC frame.
*/
#define OPEN_FULLDUPLEX_SET 0x0D00 /* Got this with full duplex on when
* trying to connect to a normal ring.
*/
/* SET_BRIDGE_PARMS return codes: */
#define BRIDGE_INVALID_MAX_LEN 0x4000 /* MAX_ROUTING_FIELD_LENGTH odd,
* less than 6 or > 30.
*/
#define BRIDGE_INVALID_SRC_RING 0x2000 /* SOURCE_RING number zero, too large
* or = TARGET_RING.
*/
#define BRIDGE_INVALID_TRG_RING 0x1000 /* TARGET_RING number zero, too large
* or = SOURCE_RING.
*/
#define BRIDGE_INVALID_BRDGE_NO 0x0800 /* BRIDGE_NUMBER too large. */
#define BRIDGE_INVALID_OPTIONS 0x0400 /* Invalid bridge options. */
#define BRIDGE_DIAGS_FAILED 0x0200 /* Diagnostics of TMS380SRA failed. */
#define BRIDGE_NO_SRA 0x0100 /* The TMS380SRA does not exist in HW
* configuration.
*/
/*
* Bring Up Diagnostics error codes.
*/
#define BUD_INITIAL_ERROR 0x0
#define BUD_CHECKSUM_ERROR 0x1
#define BUD_ADAPTER_RAM_ERROR 0x2
#define BUD_INSTRUCTION_ERROR 0x3
#define BUD_CONTEXT_ERROR 0x4
#define BUD_PROTOCOL_ERROR 0x5
#define BUD_INTERFACE_ERROR 0x6
/* BUD constants */
#define BUD_MAX_RETRIES 3
#define BUD_MAX_LOOPCNT 6
#define BUD_TIMEOUT 3000
/* Initialization constants */
#define INIT_MAX_RETRIES 3 /* Maximum three retries. */
#define INIT_MAX_LOOPCNT 22 /* Maximum loop counts. */
/* RING STATUS field values (high/low) */
#define SIGNAL_LOSS 0x0080 /* Loss of signal on the ring
* detected.
*/
#define HARD_ERROR 0x0040 /* Transmitting or receiving beacon
* frames.
*/
#define SOFT_ERROR 0x0020 /* Report error MAC frame
* transmitted.
*/
#define TRANSMIT_BEACON 0x0010 /* Transmitting beacon frames on the
* ring.
*/
#define LOBE_WIRE_FAULT 0x0008 /* Open or short circuit in the
* cable to concentrator; adapter
* closed.
*/
#define AUTO_REMOVAL_ERROR 0x0004 /* Lobe wrap test failed, deinserted;
* adapter closed.
*/
#define REMOVE_RECEIVED 0x0001 /* Received a remove ring station MAC
* MAC frame request; adapter closed.
*/
#define COUNTER_OVERFLOW 0x8000 /* Overflow of one of the adapters
* error counters; READ.ERROR.LOG.
*/
#define SINGLE_STATION 0x4000 /* Adapter is the only station on the
* ring.
*/
#define RING_RECOVERY 0x2000 /* Claim token MAC frames on the ring;
* reset after ring purge frame.
*/
#define ADAPTER_CLOSED (LOBE_WIRE_FAULT | AUTO_REMOVAL_ERROR |\
REMOVE_RECEIVED)
/* Adapter_check_block.Status field bit assignments: */
#define DIO_PARITY 0x8000 /* Adapter detects bad parity
* through direct I/O access.
*/
#define DMA_READ_ABORT 0x4000 /* Aborting DMA read operation
* from system Parm[0]: 0=timeout,
* 1=parity error, 2=bus error;
* Parm[1]: 32 bit pointer to host
* system address at failure.
*/
#define DMA_WRITE_ABORT 0x2000 /* Aborting DMA write operation
* to system. (parameters analogous to
* DMA_READ_ABORT)
*/
#define ILLEGAL_OP_CODE 0x1000 /* Illegal operation code in the
* the adapters firmware Parm[0]-2:
* communications processor registers
* R13-R15.
*/
#define PARITY_ERRORS 0x0800 /* Adapter detects internal bus
* parity error.
*/
#define RAM_DATA_ERROR 0x0080 /* Valid only during RAM testing;
* RAM data error Parm[0-1]: 32 bit
* pointer to RAM location.
*/
#define RAM_PARITY_ERROR 0x0040 /* Valid only during RAM testing;
* RAM parity error Parm[0-1]: 32 bit
* pointer to RAM location.
*/
#define RING_UNDERRUN 0x0020 /* Internal DMA underrun when
* transmitting onto ring.
*/
#define INVALID_IRQ 0x0008 /* Unrecognized interrupt generated
* internal to adapter Parm[0-2]:
* adapter register R13-R15.
*/
#define INVALID_ERROR_IRQ 0x0004 /* Unrecognized error interrupt
* generated Parm[0-2]: adapter register
* R13-R15.
*/
#define INVALID_XOP 0x0002 /* Unrecognized XOP request in
* communication processor Parm[0-2]:
* adapter register R13-R15.
*/
#define CHECKADDR 0x05E0 /* Adapter check status information
* address offset.
*/
#define ROM_PAGE_0 0x0000 /* Adapter ROM page 0. */
/*
* RECEIVE.STATUS interrupt result SSB values: (high-low)
* (RECEIVE_COMPLETE field bit definitions in SSB.Parm[0])
*/
#define RX_COMPLETE 0x0080 /* SSB.Parm[0]; SSB.Parm[1]: 32
* bit pointer to last RPL.
*/
#define RX_SUSPENDED 0x0040 /* SSB.Parm[0]; SSB.Parm[1]: 32
* bit pointer to RPL with odd
* forward pointer.
*/
/* Valid receive CSTAT: */
#define RX_FRAME_CONTROL_BITS (RX_VALID | RX_START_FRAME | RX_END_FRAME | \
RX_FRAME_COMPLETE)
#define VALID_SINGLE_BUFFER_FRAME (RX_START_FRAME | RX_END_FRAME | \
RX_FRAME_COMPLETE)
typedef enum SKB_STAT SKB_STAT;
enum SKB_STAT {
SKB_UNAVAILABLE,
SKB_DMA_DIRECT,
SKB_DATA_COPY
};
/* Receive Parameter List (RPL) The length of the RPLs has to be initialized
* in the OPL. (OPEN parameter list)
*/
#define RPL_NUM 3
#define RX_FRAG_NUM 1 /* Maximal number of used fragments in one RPL.
* (up to firmware v2.24: 3, now: up to 9)
*/
#pragma pack(1)
typedef struct s_RPL RPL;
struct s_RPL { /* Receive Parameter List */
u_int32_t NextRPLAddr; /* Pointer to next RPL in chain
* (normalized = physical 32 bit
* address) if pointer is odd: this
* is last RPL. Pointing to itself can
* cause problems!
*/
volatile u_int16_t Status; /* Set by creation of Receive Parameter
* List RECEIVE_CSTAT_COMPLETE set by
* adapter in lists that start or end
* a frame.
*/
volatile u_int16_t FrameSize; /* Number of bytes received as a
* frame including AC/FC, Destination,
* Source, Routing field not including
* CRC, FS (Frame Status), End Delimiter
* (valid only if START_FRAME bit in
* CSTAT nonzero) must not be zero in
* any list; maximum value: (BUFFER_SIZE
* - 8) * TX_BUF_MAX sum of DataCount
* values in FragmentList must equal
* Frame_Size value in START_FRAME TPL!
* frame data fragment list
*/
/* TPL/RPL size in OPEN parameter list depending on maximal numbers
* of fragments used in one parameter list.
*/
Fragment FragList[RX_FRAG_NUM]; /* Maximum: nine frame fragments in
* one TPL. Actual version of firmware:
* 9 fragments possible.
*/
#pragma pack()
/* Special proprietary data and precalculations. */
RPL *NextRPLPtr; /* Logical pointer to next RPL in chain. */
unsigned char *MData;
struct sk_buff *Skb;
SKB_STAT SkbStat;
int RPLIndex;
dma_addr_t DMABuff; /* DMA IO bus address from dma_map */
};
/* Information that need to be kept for each board. */
typedef struct net_local {
#pragma pack(1)
IPB ipb; /* Initialization Parameter Block. */
SCB scb; /* System Command Block: system to adapter
* communication.
*/
SSB ssb; /* System Status Block: adapter to system
* communication.
*/
OPB ocpl; /* Open Options Parameter Block. */
ERRORTAB errorlogtable; /* Adapter statistic error counters.
* (read from adapter memory)
*/
unsigned char ProductID[PROD_ID_SIZE + 1]; /* Product ID */
#pragma pack()
TPL Tpl[TPL_NUM];
TPL *TplFree;
TPL *TplBusy;
unsigned char LocalTxBuffers[TPL_NUM][DEFAULT_PACKET_SIZE];
RPL Rpl[RPL_NUM];
RPL *RplHead;
RPL *RplTail;
unsigned char LocalRxBuffers[RPL_NUM][DEFAULT_PACKET_SIZE];
struct device *pdev;
int DataRate;
unsigned char ScbInUse;
unsigned short CMDqueue;
unsigned long AdapterOpenFlag:1;
unsigned long AdapterVirtOpenFlag:1;
unsigned long OpenCommandIssued:1;
unsigned long TransmitCommandActive:1;
unsigned long TransmitHaltScheduled:1;
unsigned long HaltInProgress:1;
unsigned long LobeWireFaultLogged:1;
unsigned long ReOpenInProgress:1;
unsigned long Sleeping:1;
unsigned long LastOpenStatus;
unsigned short CurrentRingStatus;
unsigned long MaxPacketSize;
unsigned long StartTime;
unsigned long LastSendTime;
struct tr_statistics MacStat; /* MAC statistics structure */
unsigned long dmalimit; /* the max DMA address (ie, ISA) */
dma_addr_t dmabuffer; /* the DMA bus address corresponding to
priv. Might be different from virt_to_bus()
for architectures with IO MMU (Alpha) */
struct timer_list timer;
wait_queue_head_t wait_for_tok_int;
INTPTRS intptrs; /* Internal adapter pointer. Must be read
* before OPEN command.
*/
unsigned short (*setnselout)(struct net_device *);
unsigned short (*sifreadb)(struct net_device *, unsigned short);
void (*sifwriteb)(struct net_device *, unsigned short, unsigned short);
unsigned short (*sifreadw)(struct net_device *, unsigned short);
void (*sifwritew)(struct net_device *, unsigned short, unsigned short);
spinlock_t lock; /* SMP protection */
void *tmspriv;
} NET_LOCAL;
#endif /* __KERNEL__ */
#endif /* __LINUX_TMS380TR_H */
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