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linux/drivers/fc4/socal.c
David Howells 7d12e780e0 IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.

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

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

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

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

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

	struct pt_regs *old_regs = set_irq_regs(regs);

And put the old one back at the end:

	set_irq_regs(old_regs);

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

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

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

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

Some notes on the interrupt handling in the drivers:

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

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

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

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

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/* socal.c: Sparc SUNW,socal (SOC+) Fibre Channel Sbus adapter support.
*
* Copyright (C) 1998,1999 Jakub Jelinek (jj@ultra.linux.cz)
*
* Sources:
* Fibre Channel Physical & Signaling Interface (FC-PH), dpANS, 1994
* dpANS Fibre Channel Protocol for SCSI (X3.269-199X), Rev. 012, 1995
* SOC+ Programming Guide 0.1
* Fibre Channel Arbitrated Loop (FC-AL), dpANS rev. 4.5, 1995
*
* Supported hardware:
* On-board SOC+ adapters of Ultra Enterprise servers and sun4d.
*/
static char *version =
"socal.c: SOC+ driver v1.1 9/Feb/99 Jakub Jelinek (jj@ultra.linux.cz)\n";
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/types.h>
#include <linux/fcntl.h>
#include <linux/interrupt.h>
#include <linux/ptrace.h>
#include <linux/ioport.h>
#include <linux/in.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/bitops.h>
#include <asm/system.h>
#include <asm/io.h>
#include <asm/dma.h>
#include <linux/errno.h>
#include <asm/byteorder.h>
#include <asm/openprom.h>
#include <asm/oplib.h>
#include <asm/pgtable.h>
#include <asm/irq.h>
/* #define SOCALDEBUG */
/* #define HAVE_SOCAL_UCODE */
/* #define USE_64BIT_MODE */
#include "fcp_impl.h"
#include "socal.h"
#ifdef HAVE_SOCAL_UCODE
#include "socal_asm.h"
#endif
#define socal_printk printk ("socal%d: ", s->socal_no); printk
#ifdef SOCALDEBUG
#define SOD(x) socal_printk x;
#else
#define SOD(x)
#endif
#define for_each_socal(s) for (s = socals; s; s = s->next)
struct socal *socals = NULL;
static void socal_copy_from_xram(void *d, void __iomem *xram, long size)
{
u32 *dp = (u32 *) d;
while (size) {
*dp++ = sbus_readl(xram);
xram += sizeof(u32);
size -= sizeof(u32);
}
}
static void socal_copy_to_xram(void __iomem *xram, void *s, long size)
{
u32 *sp = (u32 *) s;
while (size) {
u32 val = *sp++;
sbus_writel(val, xram);
xram += sizeof(u32);
size -= sizeof(u32);
}
}
#ifdef HAVE_SOCAL_UCODE
static void socal_bzero(unsigned long xram, int size)
{
while (size) {
sbus_writel(0, xram);
xram += sizeof(u32);
size -= sizeof(u32);
}
}
#endif
static inline void socal_disable(struct socal *s)
{
sbus_writel(0, s->regs + IMASK);
sbus_writel(SOCAL_CMD_SOFT_RESET, s->regs + CMD);
}
static inline void socal_enable(struct socal *s)
{
SOD(("enable %08x\n", s->cfg))
sbus_writel(0, s->regs + SAE);
sbus_writel(s->cfg, s->regs + CFG);
sbus_writel(SOCAL_CMD_RSP_QALL, s->regs + CMD);
SOCAL_SETIMASK(s, SOCAL_IMASK_RSP_QALL | SOCAL_IMASK_SAE);
SOD(("imask %08x %08x\n", s->imask, sbus_readl(s->regs + IMASK)));
}
static void socal_reset(fc_channel *fc)
{
socal_port *port = (socal_port *)fc;
struct socal *s = port->s;
/* FIXME */
socal_disable(s);
s->req[0].seqno = 1;
s->req[1].seqno = 1;
s->rsp[0].seqno = 1;
s->rsp[1].seqno = 1;
s->req[0].in = 0;
s->req[1].in = 0;
s->rsp[0].in = 0;
s->rsp[1].in = 0;
s->req[0].out = 0;
s->req[1].out = 0;
s->rsp[0].out = 0;
s->rsp[1].out = 0;
/* FIXME */
socal_enable(s);
}
static inline void socal_solicited(struct socal *s, unsigned long qno)
{
socal_rsp *hwrsp;
socal_cq *sw_cq;
int token;
int status;
fc_channel *fc;
sw_cq = &s->rsp[qno];
/* Finally an improvement against old SOC :) */
sw_cq->in = sbus_readb(s->regs + RESP + qno);
SOD (("socal_solicited, %d packets arrived\n",
(sw_cq->in - sw_cq->out) & sw_cq->last))
for (;;) {
hwrsp = (socal_rsp *)sw_cq->pool + sw_cq->out;
SOD(("hwrsp %p out %d\n", hwrsp, sw_cq->out))
#if defined(SOCALDEBUG) && 0
{
u32 *u = (u32 *)hwrsp;
SOD(("%08x.%08x.%08x.%08x.%08x.%08x.%08x.%08x\n",
u[0],u[1],u[2],u[3],u[4],u[5],u[6],u[7]))
u += 8;
SOD(("%08x.%08x.%08x.%08x.%08x.%08x.%08x.%08x\n",
u[0],u[1],u[2],u[3],u[4],u[5],u[6],u[7]))
u = (u32 *)s->xram;
while (u < ((u32 *)s->regs)) {
if (sbus_readl(&u[0]) == 0x00003000 ||
sbus_readl(&u[0]) == 0x00003801) {
SOD(("Found at %04lx\n",
(unsigned long)u - (unsigned long)s->xram))
SOD((" %08x.%08x.%08x.%08x.%08x.%08x.%08x.%08x\n",
sbus_readl(&u[0]), sbus_readl(&u[1]),
sbus_readl(&u[2]), sbus_readl(&u[3]),
sbus_readl(&u[4]), sbus_readl(&u[5]),
sbus_readl(&u[6]), sbus_readl(&u[7])))
u += 8;
SOD((" %08x.%08x.%08x.%08x.%08x.%08x.%08x.%08x\n",
sbus_readl(&u[0]), sbus_readl(&u[1]),
sbus_readl(&u[2]), sbus_readl(&u[3]),
sbus_readl(&u[4]), sbus_readl(&u[5]),
sbus_readl(&u[6]), sbus_readl(&u[7])))
u -= 8;
}
u++;
}
}
#endif
token = hwrsp->shdr.token;
status = hwrsp->status;
fc = (fc_channel *)(&s->port[(token >> 11) & 1]);
SOD(("Solicited token %08x status %08x\n", token, status))
if (status == SOCAL_OK) {
fcp_receive_solicited(fc, token >> 12,
token & ((1 << 11) - 1),
FC_STATUS_OK, NULL);
} else {
/* We have intentionally defined FC_STATUS_* constants
* to match SOCAL_* constants, otherwise we'd have to
* translate status.
*/
fcp_receive_solicited(fc, token >> 12,
token & ((1 << 11) - 1), status, &hwrsp->fchdr);
}
if (++sw_cq->out > sw_cq->last) {
sw_cq->seqno++;
sw_cq->out = 0;
}
if (sw_cq->out == sw_cq->in) {
sw_cq->in = sbus_readb(s->regs + RESP + qno);
if (sw_cq->out == sw_cq->in) {
/* Tell the hardware about it */
sbus_writel((sw_cq->out << 24) |
(SOCAL_CMD_RSP_QALL &
~(SOCAL_CMD_RSP_Q0 << qno)),
s->regs + CMD);
/* Read it, so that we're sure it has been updated */
sbus_readl(s->regs + CMD);
sw_cq->in = sbus_readb(s->regs + RESP + qno);
if (sw_cq->out == sw_cq->in)
break;
}
}
}
}
static inline void socal_request (struct socal *s, u32 cmd)
{
SOCAL_SETIMASK(s, s->imask & ~(cmd & SOCAL_CMD_REQ_QALL));
SOD(("imask %08x %08x\n", s->imask, sbus_readl(s->regs + IMASK)));
SOD(("Queues available %08x OUT %X\n", cmd, s->regs->reqpr[0]))
if (s->port[s->curr_port].fc.state != FC_STATE_OFFLINE) {
fcp_queue_empty ((fc_channel *)&(s->port[s->curr_port]));
if (((s->req[1].in + 1) & s->req[1].last) != (s->req[1].out))
fcp_queue_empty ((fc_channel *)&(s->port[1 - s->curr_port]));
} else {
fcp_queue_empty ((fc_channel *)&(s->port[1 - s->curr_port]));
}
if (s->port[1 - s->curr_port].fc.state != FC_STATE_OFFLINE)
s->curr_port ^= 1;
}
static inline void socal_unsolicited (struct socal *s, unsigned long qno)
{
socal_rsp *hwrsp, *hwrspc;
socal_cq *sw_cq;
int count;
int status;
int flags;
fc_channel *fc;
sw_cq = &s->rsp[qno];
sw_cq->in = sbus_readb(s->regs + RESP + qno);
SOD (("socal_unsolicited, %d packets arrived, in %d\n",
(sw_cq->in - sw_cq->out) & sw_cq->last, sw_cq->in))
while (sw_cq->in != sw_cq->out) {
/* ...real work per entry here... */
hwrsp = (socal_rsp *)sw_cq->pool + sw_cq->out;
SOD(("hwrsp %p out %d\n", hwrsp, sw_cq->out))
#if defined(SOCALDEBUG) && 0
{
u32 *u = (u32 *)hwrsp;
SOD(("%08x.%08x.%08x.%08x.%08x.%08x.%08x.%08x\n",
u[0],u[1],u[2],u[3],u[4],u[5],u[6],u[7]))
u += 8;
SOD(("%08x.%08x.%08x.%08x.%08x.%08x.%08x.%08x\n",
u[0],u[1],u[2],u[3],u[4],u[5],u[6],u[7]))
}
#endif
hwrspc = NULL;
flags = hwrsp->shdr.flags;
count = hwrsp->count;
fc = (fc_channel *)&s->port[flags & SOCAL_PORT_B];
SOD(("FC %08lx\n", (long)fc))
if (count != 1) {
/* Ugh, continuation entries */
u8 in;
if (count != 2) {
printk("%s: Too many continuations entries %d\n",
fc->name, count);
goto update_out;
}
in = sw_cq->in;
if (in < sw_cq->out)
in += sw_cq->last + 1;
if (in < sw_cq->out + 2) {
/* Ask the hardware if they haven't arrived yet. */
sbus_writel((sw_cq->out << 24) |
(SOCAL_CMD_RSP_QALL &
~(SOCAL_CMD_RSP_Q0 << qno)),
s->regs + CMD);
/* Read it, so that we're sure it has been updated */
sbus_readl(s->regs + CMD);
sw_cq->in = sbus_readb(s->regs + RESP + qno);
in = sw_cq->in;
if (in < sw_cq->out)
in += sw_cq->last + 1;
if (in < sw_cq->out + 2) /* Nothing came, let us wait */
return;
}
if (sw_cq->out == sw_cq->last)
hwrspc = (socal_rsp *)sw_cq->pool;
else
hwrspc = hwrsp + 1;
}
switch (flags & ~SOCAL_PORT_B) {
case SOCAL_STATUS:
status = hwrsp->status;
switch (status) {
case SOCAL_ONLINE:
SOD(("State change to ONLINE\n"));
fcp_state_change(fc, FC_STATE_ONLINE);
break;
case SOCAL_ONLINE_LOOP:
SOD(("State change to ONLINE_LOOP\n"));
fcp_state_change(fc, FC_STATE_ONLINE);
break;
case SOCAL_OFFLINE:
SOD(("State change to OFFLINE\n"));
fcp_state_change(fc, FC_STATE_OFFLINE);
break;
default:
printk ("%s: Unknown STATUS no %d\n",
fc->name, status);
break;
};
break;
case (SOCAL_UNSOLICITED|SOCAL_FC_HDR):
{
int r_ctl = *((u8 *)&hwrsp->fchdr);
unsigned len;
if ((r_ctl & 0xf0) == R_CTL_EXTENDED_SVC) {
len = hwrsp->shdr.bytecnt;
if (len < 4 || !hwrspc) {
printk ("%s: Invalid R_CTL %02x "
"continuation entries\n",
fc->name, r_ctl);
} else {
if (len > 60)
len = 60;
if (*(u32 *)hwrspc == LS_DISPLAY) {
int i;
for (i = 4; i < len; i++)
if (((u8 *)hwrspc)[i] == '\n')
((u8 *)hwrspc)[i] = ' ';
((u8 *)hwrspc)[len] = 0;
printk ("%s message: %s\n",
fc->name, ((u8 *)hwrspc) + 4);
} else {
printk ("%s: Unknown LS_CMD "
"%08x\n", fc->name,
*(u32 *)hwrspc);
}
}
} else {
printk ("%s: Unsolicited R_CTL %02x "
"not handled\n", fc->name, r_ctl);
}
}
break;
default:
printk ("%s: Unexpected flags %08x\n", fc->name, flags);
break;
};
update_out:
if (++sw_cq->out > sw_cq->last) {
sw_cq->seqno++;
sw_cq->out = 0;
}
if (hwrspc) {
if (++sw_cq->out > sw_cq->last) {
sw_cq->seqno++;
sw_cq->out = 0;
}
}
if (sw_cq->out == sw_cq->in) {
sw_cq->in = sbus_readb(s->regs + RESP + qno);
if (sw_cq->out == sw_cq->in) {
/* Tell the hardware about it */
sbus_writel((sw_cq->out << 24) |
(SOCAL_CMD_RSP_QALL &
~(SOCAL_CMD_RSP_Q0 << qno)),
s->regs + CMD);
/* Read it, so that we're sure it has been updated */
sbus_readl(s->regs + CMD);
sw_cq->in = sbus_readb(s->regs + RESP + qno);
}
}
}
}
static irqreturn_t socal_intr(int irq, void *dev_id)
{
u32 cmd;
unsigned long flags;
register struct socal *s = (struct socal *)dev_id;
spin_lock_irqsave(&s->lock, flags);
cmd = sbus_readl(s->regs + CMD);
for (; (cmd = SOCAL_INTR (s, cmd)); cmd = sbus_readl(s->regs + CMD)) {
#ifdef SOCALDEBUG
static int cnt = 0;
if (cnt++ < 50)
printk("soc_intr %08x\n", cmd);
#endif
if (cmd & SOCAL_CMD_RSP_Q2)
socal_unsolicited (s, SOCAL_UNSOLICITED_RSP_Q);
if (cmd & SOCAL_CMD_RSP_Q1)
socal_unsolicited (s, SOCAL_SOLICITED_BAD_RSP_Q);
if (cmd & SOCAL_CMD_RSP_Q0)
socal_solicited (s, SOCAL_SOLICITED_RSP_Q);
if (cmd & SOCAL_CMD_REQ_QALL)
socal_request (s, cmd);
}
spin_unlock_irqrestore(&s->lock, flags);
return IRQ_HANDLED;
}
#define TOKEN(proto, port, token) (((proto)<<12)|(token)|(port))
static int socal_hw_enque (fc_channel *fc, fcp_cmnd *fcmd)
{
socal_port *port = (socal_port *)fc;
struct socal *s = port->s;
unsigned long qno;
socal_cq *sw_cq;
int cq_next_in;
socal_req *request;
fc_hdr *fch;
int i;
if (fcmd->proto == TYPE_SCSI_FCP)
qno = 1;
else
qno = 0;
SOD(("Putting a FCP packet type %d into hw queue %d\n", fcmd->proto, qno))
if (s->imask & (SOCAL_IMASK_REQ_Q0 << qno)) {
SOD(("EIO %08x\n", s->imask))
return -EIO;
}
sw_cq = s->req + qno;
cq_next_in = (sw_cq->in + 1) & sw_cq->last;
if (cq_next_in == sw_cq->out &&
cq_next_in == (sw_cq->out = sbus_readb(s->regs + REQP + qno))) {
SOD(("%d IN %d OUT %d LAST %d\n",
qno, sw_cq->in,
sw_cq->out, sw_cq->last))
SOCAL_SETIMASK(s, s->imask | (SOCAL_IMASK_REQ_Q0 << qno));
SOD(("imask %08x %08x\n", s->imask, sbus_readl(s->regs + IMASK)));
/* If queue is full, just say NO. */
return -EBUSY;
}
request = sw_cq->pool + sw_cq->in;
fch = &request->fchdr;
switch (fcmd->proto) {
case TYPE_SCSI_FCP:
request->shdr.token = TOKEN(TYPE_SCSI_FCP, port->mask, fcmd->token);
request->data[0].base = fc->dma_scsi_cmd + fcmd->token * sizeof(fcp_cmd);
request->data[0].count = sizeof(fcp_cmd);
request->data[1].base = fc->dma_scsi_rsp + fcmd->token * fc->rsp_size;
request->data[1].count = fc->rsp_size;
if (fcmd->data) {
request->shdr.segcnt = 3;
i = fc->scsi_cmd_pool[fcmd->token].fcp_data_len;
request->shdr.bytecnt = i;
request->data[2].base = fcmd->data;
request->data[2].count = i;
request->type = (fc->scsi_cmd_pool[fcmd->token].fcp_cntl & FCP_CNTL_WRITE) ?
SOCAL_CQTYPE_IO_WRITE : SOCAL_CQTYPE_IO_READ;
} else {
request->shdr.segcnt = 2;
request->shdr.bytecnt = 0;
request->data[2].base = 0;
request->data[2].count = 0;
request->type = SOCAL_CQTYPE_SIMPLE;
}
FILL_FCHDR_RCTL_DID(fch, R_CTL_COMMAND, fcmd->did);
FILL_FCHDR_SID(fch, fc->sid);
FILL_FCHDR_TYPE_FCTL(fch, TYPE_SCSI_FCP, F_CTL_FIRST_SEQ | F_CTL_SEQ_INITIATIVE);
FILL_FCHDR_SEQ_DF_SEQ(fch, 0, 0, 0);
FILL_FCHDR_OXRX(fch, 0xffff, 0xffff);
fch->param = 0;
request->shdr.flags = port->flags;
request->shdr.class = fc->posmap ? 3 : 2;
break;
case PROTO_OFFLINE:
memset (request, 0, sizeof(*request));
request->shdr.token = TOKEN(PROTO_OFFLINE, port->mask, fcmd->token);
request->type = SOCAL_CQTYPE_OFFLINE;
FILL_FCHDR_RCTL_DID(fch, R_CTL_COMMAND, fcmd->did);
FILL_FCHDR_SID(fch, fc->sid);
FILL_FCHDR_TYPE_FCTL(fch, TYPE_SCSI_FCP, F_CTL_FIRST_SEQ | F_CTL_SEQ_INITIATIVE);
FILL_FCHDR_SEQ_DF_SEQ(fch, 0, 0, 0);
FILL_FCHDR_OXRX(fch, 0xffff, 0xffff);
request->shdr.flags = port->flags;
break;
case PROTO_REPORT_AL_MAP:
memset (request, 0, sizeof(*request));
request->shdr.token = TOKEN(PROTO_REPORT_AL_MAP, port->mask, fcmd->token);
request->type = SOCAL_CQTYPE_REPORT_MAP;
request->shdr.flags = port->flags;
request->shdr.segcnt = 1;
request->shdr.bytecnt = sizeof(fc_al_posmap);
request->data[0].base = fcmd->cmd;
request->data[0].count = sizeof(fc_al_posmap);
break;
default:
request->shdr.token = TOKEN(fcmd->proto, port->mask, fcmd->token);
request->shdr.class = fc->posmap ? 3 : 2;
request->shdr.flags = port->flags;
memcpy (fch, &fcmd->fch, sizeof(fc_hdr));
request->data[0].count = fcmd->cmdlen;
request->data[1].count = fcmd->rsplen;
request->type = fcmd->class;
switch (fcmd->class) {
case FC_CLASS_OUTBOUND:
request->data[0].base = fcmd->cmd;
request->data[0].count = fcmd->cmdlen;
request->type = SOCAL_CQTYPE_OUTBOUND;
request->shdr.bytecnt = fcmd->cmdlen;
request->shdr.segcnt = 1;
break;
case FC_CLASS_INBOUND:
request->data[0].base = fcmd->rsp;
request->data[0].count = fcmd->rsplen;
request->type = SOCAL_CQTYPE_INBOUND;
request->shdr.bytecnt = 0;
request->shdr.segcnt = 1;
break;
case FC_CLASS_SIMPLE:
request->data[0].base = fcmd->cmd;
request->data[1].base = fcmd->rsp;
request->data[0].count = fcmd->cmdlen;
request->data[1].count = fcmd->rsplen;
request->type = SOCAL_CQTYPE_SIMPLE;
request->shdr.bytecnt = fcmd->cmdlen;
request->shdr.segcnt = 2;
break;
case FC_CLASS_IO_READ:
case FC_CLASS_IO_WRITE:
request->data[0].base = fcmd->cmd;
request->data[1].base = fcmd->rsp;
request->data[0].count = fcmd->cmdlen;
request->data[1].count = fcmd->rsplen;
request->type = (fcmd->class == FC_CLASS_IO_READ) ? SOCAL_CQTYPE_IO_READ : SOCAL_CQTYPE_IO_WRITE;
if (fcmd->data) {
request->data[2].base = fcmd->data;
request->data[2].count = fcmd->datalen;
request->shdr.bytecnt = fcmd->datalen;
request->shdr.segcnt = 3;
} else {
request->shdr.bytecnt = 0;
request->shdr.segcnt = 2;
}
break;
}
break;
}
request->count = 1;
request->flags = 0;
request->seqno = sw_cq->seqno;
SOD(("queueing token %08x\n", request->shdr.token))
/* And now tell the SOCAL about it */
if (++sw_cq->in > sw_cq->last) {
sw_cq->in = 0;
sw_cq->seqno++;
}
SOD(("Putting %08x into cmd\n", SOCAL_CMD_RSP_QALL | (sw_cq->in << 24) | (SOCAL_CMD_REQ_Q0 << qno)))
sbus_writel(SOCAL_CMD_RSP_QALL | (sw_cq->in << 24) | (SOCAL_CMD_REQ_Q0 << qno),
s->regs + CMD);
/* Read so that command is completed */
sbus_readl(s->regs + CMD);
return 0;
}
static inline void socal_download_fw(struct socal *s)
{
#ifdef HAVE_SOCAL_UCODE
SOD(("Loading %ld bytes from %p to %p\n", sizeof(socal_ucode), socal_ucode, s->xram))
socal_copy_to_xram(s->xram, socal_ucode, sizeof(socal_ucode));
SOD(("Clearing the rest of memory\n"))
socal_bzero (s->xram + sizeof(socal_ucode), 65536 - sizeof(socal_ucode));
SOD(("Done\n"))
#endif
}
/* Check for what the best SBUS burst we can use happens
* to be on this machine.
*/
static inline void socal_init_bursts(struct socal *s, struct sbus_dev *sdev)
{
int bsizes, bsizes_more;
u32 cfg;
bsizes = (prom_getintdefault(sdev->prom_node,"burst-sizes",0xff) & 0xff);
bsizes_more = (prom_getintdefault(sdev->bus->prom_node, "burst-sizes", 0xff) & 0xff);
bsizes &= bsizes_more;
#ifdef USE_64BIT_MODE
#ifdef __sparc_v9__
mmu_set_sbus64(sdev, bsizes >> 16);
#endif
#endif
if ((bsizes & 0x7f) == 0x7f)
cfg = SOCAL_CFG_BURST_64;
else if ((bsizes & 0x3f) == 0x3f)
cfg = SOCAL_CFG_BURST_32;
else if ((bsizes & 0x1f) == 0x1f)
cfg = SOCAL_CFG_BURST_16;
else
cfg = SOCAL_CFG_BURST_4;
#ifdef USE_64BIT_MODE
#ifdef __sparc_v9__
/* What is BURST_128? -jj */
if ((bsizes & 0x780000) == 0x780000)
cfg |= (SOCAL_CFG_BURST_64 << 8) | SOCAL_CFG_SBUS_ENHANCED;
else if ((bsizes & 0x380000) == 0x380000)
cfg |= (SOCAL_CFG_BURST_32 << 8) | SOCAL_CFG_SBUS_ENHANCED;
else if ((bsizes & 0x180000) == 0x180000)
cfg |= (SOCAL_CFG_BURST_16 << 8) | SOCAL_CFG_SBUS_ENHANCED;
else
cfg |= (SOCAL_CFG_BURST_8 << 8) | SOCAL_CFG_SBUS_ENHANCED;
#endif
#endif
s->cfg = cfg;
}
static inline void socal_init(struct sbus_dev *sdev, int no)
{
unsigned char tmp[60];
int propl;
struct socal *s;
static unsigned version_printed = 0;
socal_hw_cq cq[8];
int size, i;
int irq, node;
s = kzalloc (sizeof (struct socal), GFP_KERNEL);
if (!s) return;
spin_lock_init(&s->lock);
s->socal_no = no;
SOD(("socals %08lx socal_intr %08lx socal_hw_enque %08lx\n",
(long)socals, (long)socal_intr, (long)socal_hw_enque))
if (version_printed++ == 0)
printk (version);
s->port[0].fc.module = THIS_MODULE;
s->port[1].fc.module = THIS_MODULE;
s->next = socals;
socals = s;
s->port[0].fc.dev = sdev;
s->port[1].fc.dev = sdev;
s->port[0].s = s;
s->port[1].s = s;
s->port[0].fc.next = &s->port[1].fc;
/* World Wide Name of SOCAL */
propl = prom_getproperty (sdev->prom_node, "wwn", tmp, sizeof(tmp));
if (propl != sizeof (fc_wwn)) {
s->wwn.naaid = NAAID_IEEE_REG;
s->wwn.nportid = 0x123;
s->wwn.hi = 0x1234;
s->wwn.lo = 0x12345678;
} else
memcpy (&s->wwn, tmp, sizeof (fc_wwn));
memcpy (&s->port[0].fc.wwn_nport, &s->wwn, sizeof (fc_wwn));
s->port[0].fc.wwn_nport.lo++;
memcpy (&s->port[1].fc.wwn_nport, &s->wwn, sizeof (fc_wwn));
s->port[1].fc.wwn_nport.lo+=2;
node = prom_getchild (sdev->prom_node);
while (node && (node = prom_searchsiblings (node, "sf"))) {
int port;
port = prom_getintdefault(node, "port#", -1);
switch (port) {
case 0:
case 1:
if (prom_getproplen(node, "port-wwn") == sizeof (fc_wwn))
prom_getproperty (node, "port-wwn",
(char *)&s->port[port].fc.wwn_nport,
sizeof (fc_wwn));
break;
default:
break;
};
node = prom_getsibling(node);
}
memcpy (&s->port[0].fc.wwn_node, &s->wwn, sizeof (fc_wwn));
memcpy (&s->port[1].fc.wwn_node, &s->wwn, sizeof (fc_wwn));
SOD(("Got wwns %08x%08x ports %08x%08x and %08x%08x\n",
*(u32 *)&s->port[0].fc.wwn_node, s->port[0].fc.wwn_node.lo,
*(u32 *)&s->port[0].fc.wwn_nport, s->port[0].fc.wwn_nport.lo,
*(u32 *)&s->port[1].fc.wwn_nport, s->port[1].fc.wwn_nport.lo))
s->port[0].fc.sid = 1;
s->port[1].fc.sid = 17;
s->port[0].fc.did = 2;
s->port[1].fc.did = 18;
s->port[0].fc.reset = socal_reset;
s->port[1].fc.reset = socal_reset;
if (sdev->num_registers == 1) {
s->eeprom = sbus_ioremap(&sdev->resource[0], 0,
sdev->reg_addrs[0].reg_size, "socal xram");
if (sdev->reg_addrs[0].reg_size > 0x20000)
s->xram = s->eeprom + 0x10000UL;
else
s->xram = s->eeprom;
s->regs = (s->xram + 0x10000UL);
} else {
/* E.g. starfire presents 3 registers for SOCAL */
s->xram = sbus_ioremap(&sdev->resource[1], 0,
sdev->reg_addrs[1].reg_size, "socal xram");
s->regs = sbus_ioremap(&sdev->resource[2], 0,
sdev->reg_addrs[2].reg_size, "socal regs");
}
socal_init_bursts(s, sdev);
SOD(("Disabling SOCAL\n"))
socal_disable (s);
irq = sdev->irqs[0];
if (request_irq (irq, socal_intr, IRQF_SHARED, "SOCAL", (void *)s)) {
socal_printk ("Cannot order irq %d to go\n", irq);
socals = s->next;
return;
}
SOD(("SOCAL uses IRQ %d\n", irq))
s->port[0].fc.irq = irq;
s->port[1].fc.irq = irq;
sprintf (s->port[0].fc.name, "socal%d port A", no);
sprintf (s->port[1].fc.name, "socal%d port B", no);
s->port[0].flags = SOCAL_FC_HDR | SOCAL_PORT_A;
s->port[1].flags = SOCAL_FC_HDR | SOCAL_PORT_B;
s->port[1].mask = (1 << 11);
s->port[0].fc.hw_enque = socal_hw_enque;
s->port[1].fc.hw_enque = socal_hw_enque;
socal_download_fw (s);
SOD(("Downloaded firmware\n"))
/* Now setup xram circular queues */
memset (cq, 0, sizeof(cq));
size = (SOCAL_CQ_REQ0_SIZE + SOCAL_CQ_REQ1_SIZE +
SOCAL_CQ_RSP0_SIZE + SOCAL_CQ_RSP1_SIZE +
SOCAL_CQ_RSP2_SIZE) * sizeof(socal_req);
s->req_cpu = sbus_alloc_consistent(sdev, size, &s->req_dvma);
s->req[0].pool = s->req_cpu;
cq[0].address = s->req_dvma;
s->req[1].pool = s->req[0].pool + SOCAL_CQ_REQ0_SIZE;
s->rsp[0].pool = s->req[1].pool + SOCAL_CQ_REQ1_SIZE;
s->rsp[1].pool = s->rsp[0].pool + SOCAL_CQ_RSP0_SIZE;
s->rsp[2].pool = s->rsp[1].pool + SOCAL_CQ_RSP1_SIZE;
s->req[0].hw_cq = (socal_hw_cq __iomem *)(s->xram + SOCAL_CQ_REQ_OFFSET);
s->req[1].hw_cq = (socal_hw_cq __iomem *)(s->xram + SOCAL_CQ_REQ_OFFSET + sizeof(socal_hw_cq));
s->rsp[0].hw_cq = (socal_hw_cq __iomem *)(s->xram + SOCAL_CQ_RSP_OFFSET);
s->rsp[1].hw_cq = (socal_hw_cq __iomem *)(s->xram + SOCAL_CQ_RSP_OFFSET + sizeof(socal_hw_cq));
s->rsp[2].hw_cq = (socal_hw_cq __iomem *)(s->xram + SOCAL_CQ_RSP_OFFSET + 2 * sizeof(socal_hw_cq));
cq[1].address = cq[0].address + (SOCAL_CQ_REQ0_SIZE * sizeof(socal_req));
cq[4].address = cq[1].address + (SOCAL_CQ_REQ1_SIZE * sizeof(socal_req));
cq[5].address = cq[4].address + (SOCAL_CQ_RSP0_SIZE * sizeof(socal_req));
cq[6].address = cq[5].address + (SOCAL_CQ_RSP1_SIZE * sizeof(socal_req));
cq[0].last = SOCAL_CQ_REQ0_SIZE - 1;
cq[1].last = SOCAL_CQ_REQ1_SIZE - 1;
cq[4].last = SOCAL_CQ_RSP0_SIZE - 1;
cq[5].last = SOCAL_CQ_RSP1_SIZE - 1;
cq[6].last = SOCAL_CQ_RSP2_SIZE - 1;
for (i = 0; i < 8; i++)
cq[i].seqno = 1;
s->req[0].last = SOCAL_CQ_REQ0_SIZE - 1;
s->req[1].last = SOCAL_CQ_REQ1_SIZE - 1;
s->rsp[0].last = SOCAL_CQ_RSP0_SIZE - 1;
s->rsp[1].last = SOCAL_CQ_RSP1_SIZE - 1;
s->rsp[2].last = SOCAL_CQ_RSP2_SIZE - 1;
s->req[0].seqno = 1;
s->req[1].seqno = 1;
s->rsp[0].seqno = 1;
s->rsp[1].seqno = 1;
s->rsp[2].seqno = 1;
socal_copy_to_xram(s->xram + SOCAL_CQ_REQ_OFFSET, cq, sizeof(cq));
SOD(("Setting up params\n"))
/* Make our sw copy of SOCAL service parameters */
socal_copy_from_xram(s->serv_params, s->xram + 0x280, sizeof (s->serv_params));
s->port[0].fc.common_svc = (common_svc_parm *)s->serv_params;
s->port[0].fc.class_svcs = (svc_parm *)(s->serv_params + 0x20);
s->port[1].fc.common_svc = (common_svc_parm *)&s->serv_params;
s->port[1].fc.class_svcs = (svc_parm *)(s->serv_params + 0x20);
socal_enable (s);
SOD(("Enabled SOCAL\n"))
}
static int __init socal_probe(void)
{
struct sbus_bus *sbus;
struct sbus_dev *sdev = NULL;
struct socal *s;
int cards = 0;
for_each_sbus(sbus) {
for_each_sbusdev(sdev, sbus) {
if(!strcmp(sdev->prom_name, "SUNW,socal")) {
socal_init(sdev, cards);
cards++;
}
}
}
if (!cards)
return -EIO;
for_each_socal(s)
if (s->next)
s->port[1].fc.next = &s->next->port[0].fc;
fcp_init (&socals->port[0].fc);
return 0;
}
static void __exit socal_cleanup(void)
{
struct socal *s;
int irq;
struct sbus_dev *sdev;
for_each_socal(s) {
irq = s->port[0].fc.irq;
free_irq (irq, s);
fcp_release(&(s->port[0].fc), 2);
sdev = s->port[0].fc.dev;
if (sdev->num_registers == 1) {
sbus_iounmap(s->eeprom, sdev->reg_addrs[0].reg_size);
} else {
sbus_iounmap(s->xram, sdev->reg_addrs[1].reg_size);
sbus_iounmap(s->regs, sdev->reg_addrs[2].reg_size);
}
sbus_free_consistent(sdev,
(SOCAL_CQ_REQ0_SIZE + SOCAL_CQ_REQ1_SIZE +
SOCAL_CQ_RSP0_SIZE + SOCAL_CQ_RSP1_SIZE +
SOCAL_CQ_RSP2_SIZE) * sizeof(socal_req),
s->req_cpu, s->req_dvma);
}
}
module_init(socal_probe);
module_exit(socal_cleanup);
MODULE_LICENSE("GPL");
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