/******************************************************************************
** High Performance device driver for the Symbios 53C896 controller.
**
** Copyright (C) 1998-2001 Gerard Roudier <groudier@free.fr>
**
** This driver also supports all the Symbios 53C8XX controller family,
** except 53C810 revisions < 16, 53C825 revisions < 16 and all
** revisions of 53C815 controllers.
**
** This driver is based on the Linux port of the FreeBSD ncr driver.
**
** Copyright (C) 1994 Wolfgang Stanglmeier
**
**-----------------------------------------------------------------------------
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
**
**-----------------------------------------------------------------------------
**
** The Linux port of the FreeBSD ncr driver has been achieved in
** november 1995 by:
**
** Gerard Roudier <groudier@free.fr>
**
** Being given that this driver originates from the FreeBSD version, and
** in order to keep synergy on both, any suggested enhancements and corrections
** received on Linux are automatically a potential candidate for the FreeBSD
** version.
**
** The original driver has been written for 386bsd and FreeBSD by
** Wolfgang Stanglmeier <wolf@cologne.de>
** Stefan Esser <se@mi.Uni-Koeln.de>
**
**-----------------------------------------------------------------------------
**
** Major contributions:
** --------------------
**
** NVRAM detection and reading.
** Copyright (C) 1997 Richard Waltham <dormouse@farsrobt.demon.co.uk>
**
*******************************************************************************
*/
/*
** This file contains definitions and code that the
** sym53c8xx and ncr53c8xx drivers should share.
** The sharing will be achieved in a further version
** of the driver bundle. For now, only the ncr53c8xx
** driver includes this file.
*/
/*==========================================================
**
** Hmmm... What complex some PCI-HOST bridges actually
** are, despite the fact that the PCI specifications
** are looking so smart and simple! ;-)
**
**==========================================================
*/
/*==========================================================
**
** Miscallaneous defines.
**
**==========================================================
*/
#define u_char unsigned char
#define u_long unsigned long
#ifndef bzero
#define bzero(d, n) memset((d), 0, (n))
#endif
/*==========================================================
**
** assert ()
**
**==========================================================
**
** modified copy from 386bsd:/usr/include/sys/assert.h
**
**----------------------------------------------------------
*/
#define assert(expression) { \
if (!(expression)) { \
(void)panic( \
"assertion \"%s\" failed: file \"%s\", line %d\n", \
#expression, \
__FILE__, __LINE__); \
} \
}
/*==========================================================
**
** Debugging tags
**
**==========================================================
*/
#define DEBUG_ALLOC (0x0001)
#define DEBUG_PHASE (0x0002)
#define DEBUG_QUEUE (0x0008)
#define DEBUG_RESULT (0x0010)
#define DEBUG_POINTER (0x0020)
#define DEBUG_SCRIPT (0x0040)
#define DEBUG_TINY (0x0080)
#define DEBUG_TIMING (0x0100)
#define DEBUG_NEGO (0x0200)
#define DEBUG_TAGS (0x0400)
#define DEBUG_SCATTER (0x0800)
#define DEBUG_IC (0x1000)
/*
** Enable/Disable debug messages.
** Can be changed at runtime too.
*/
#ifdef SCSI_NCR_DEBUG_INFO_SUPPORT
static int ncr_debug = SCSI_NCR_DEBUG_FLAGS;
#define DEBUG_FLAGS ncr_debug
#else
#define DEBUG_FLAGS SCSI_NCR_DEBUG_FLAGS
#endif
/*==========================================================
**
** A la VMS/CAM-3 queue management.
** Implemented from linux list management.
**
**==========================================================
*/
typedef struct xpt_quehead {
struct xpt_quehead *flink; /* Forward pointer */
struct xpt_quehead *blink; /* Backward pointer */
} XPT_QUEHEAD;
#define xpt_que_init(ptr) do { \
(ptr)->flink = (ptr); (ptr)->blink = (ptr); \
} while (0)
static inline void __xpt_que_add(struct xpt_quehead * new,
struct xpt_quehead * blink,
struct xpt_quehead * flink)
{
flink->blink = new;
new->flink = flink;
new->blink = blink;
blink->flink = new;
}
static inline void __xpt_que_del(struct xpt_quehead * blink,
struct xpt_quehead * flink)
{
flink->blink = blink;
blink->flink = flink;
}
static inline int xpt_que_empty(struct xpt_quehead *head)
{
return head->flink == head;
}
static inline void xpt_que_splice(struct xpt_quehead *list,
struct xpt_quehead *head)
{
struct xpt_quehead *first = list->flink;
if (first != list) {
struct xpt_quehead *last = list->blink;
struct xpt_quehead *at = head->flink;
first->blink = head;
head->flink = first;
last->flink = at;
at->blink = last;
}
}
#define xpt_que_entry(ptr, type, member) \
((type *)((char *)(ptr)-(unsigned long)(&((type *)0)->member)))
#define xpt_insque(new, pos) __xpt_que_add(new, pos, (pos)->flink)
#define xpt_remque(el) __xpt_que_del((el)->blink, (el)->flink)
#define xpt_insque_head(new, head) __xpt_que_add(new, head, (head)->flink)
static inline struct xpt_quehead *xpt_remque_head(struct xpt_quehead *head)
{
struct xpt_quehead *elem = head->flink;
if (elem != head)
__xpt_que_del(head, elem->flink);
else
elem = NULL;
return elem;
}
#define xpt_insque_tail(new, head) __xpt_que_add(new, (head)->blink, head)
static inline struct xpt_quehead *xpt_remque_tail(struct xpt_quehead *head)
{
struct xpt_quehead *elem = head->blink;
if (elem != head)
__xpt_que_del(elem->blink, head);
else
elem = 0;
return elem;
}
/*==========================================================
**
** SMP threading.
**
** Assuming that SMP systems are generally high end
** systems and may use several SCSI adapters, we are
** using one lock per controller instead of some global
** one. For the moment (linux-2.1.95), driver's entry
** points are called with the 'io_request_lock' lock
** held, so:
** - We are uselessly loosing a couple of micro-seconds
** to lock the controller data structure.
** - But the driver is not broken by design for SMP and
** so can be more resistant to bugs or bad changes in
** the IO sub-system code.
** - A small advantage could be that the interrupt code
** is grained as wished (e.g.: by controller).
**
**==========================================================
*/
spinlock_t DRIVER_SMP_LOCK = SPIN_LOCK_UNLOCKED;
#define NCR_LOCK_DRIVER(flags) spin_lock_irqsave(&DRIVER_SMP_LOCK, flags)
#define NCR_UNLOCK_DRIVER(flags) \
spin_unlock_irqrestore(&DRIVER_SMP_LOCK, flags)
#define NCR_INIT_LOCK_NCB(np) spin_lock_init(&np->smp_lock)
#define NCR_LOCK_NCB(np, flags) spin_lock_irqsave(&np->smp_lock, flags)
#define NCR_UNLOCK_NCB(np, flags) spin_unlock_irqrestore(&np->smp_lock, flags)
#define NCR_LOCK_SCSI_DONE(host, flags) \
spin_lock_irqsave((host)->host_lock, flags)
#define NCR_UNLOCK_SCSI_DONE(host, flags) \
spin_unlock_irqrestore(((host)->host_lock), flags)
/*==========================================================
**
** Memory mapped IO
**
** Since linux-2.1, we must use ioremap() to map the io
** memory space and iounmap() to unmap it. This allows
** portability. Linux 1.3.X and 2.0.X allow to remap
** physical pages addresses greater than the highest
** physical memory address to kernel virtual pages with
** vremap() / vfree(). That was not portable but worked
** with i386 architecture.
**
**==========================================================
*/
#ifdef __sparc__
#include <asm/irq.h>
#endif
#define memcpy_to_pci(a, b, c) memcpy_toio((a), (b), (c))
/*==========================================================
**
** Insert a delay in micro-seconds and milli-seconds.
**
** Under Linux, udelay() is restricted to delay <
** 1 milli-second. In fact, it generally works for up
** to 1 second delay. Since 2.1.105, the mdelay() function
** is provided for delays in milli-seconds.
** Under 2.0 kernels, udelay() is an inline function
** that is very inaccurate on Pentium processors.
**
**==========================================================
*/
#define UDELAY udelay
#define MDELAY mdelay
/*==========================================================
**
** Simple power of two buddy-like allocator.
**
** This simple code is not intended to be fast, but to
** provide power of 2 aligned memory allocations.
** Since the SCRIPTS processor only supplies 8 bit
** arithmetic, this allocator allows simple and fast
** address calculations from the SCRIPTS code.
** In addition, cache line alignment is guaranteed for
** power of 2 cache line size.
** Enhanced in linux-2.3.44 to provide a memory pool
** per pcidev to support dynamic dma mapping. (I would
** have preferred a real bus astraction, btw).
**
**==========================================================
*/
#define __GetFreePages(flags, order) __get_free_pages(flags, order)
#define MEMO_SHIFT 4 /* 16 bytes minimum memory chunk */
#if PAGE_SIZE >= 8192
#define MEMO_PAGE_ORDER 0 /* 1 PAGE maximum */
#else
#define MEMO_PAGE_ORDER 1 /* 2 PAGES maximum */
#endif
#define MEMO_FREE_UNUSED /* Free unused pages immediately */
#define MEMO_WARN 1
#define MEMO_GFP_FLAGS GFP_ATOMIC
#define MEMO_CLUSTER_SHIFT (PAGE_SHIFT+MEMO_PAGE_ORDER)
#define MEMO_CLUSTER_SIZE (1UL << MEMO_CLUSTER_SHIFT)
#define MEMO_CLUSTER_MASK (MEMO_CLUSTER_SIZE-1)
typedef u_long m_addr_t; /* Enough bits to bit-hack addresses */
typedef struct device *m_bush_t; /* Something that addresses DMAable */
typedef struct m_link { /* Link between free memory chunks */
struct m_link *next;
} m_link_s;
typedef struct m_vtob { /* Virtual to Bus address translation */
struct m_vtob *next;
m_addr_t vaddr;
m_addr_t baddr;
} m_vtob_s;
#define VTOB_HASH_SHIFT 5
#define VTOB_HASH_SIZE (1UL << VTOB_HASH_SHIFT)
#define VTOB_HASH_MASK (VTOB_HASH_SIZE-1)
#define VTOB_HASH_CODE(m) \
((((m_addr_t) (m)) >> MEMO_CLUSTER_SHIFT) & VTOB_HASH_MASK)
typedef struct m_pool { /* Memory pool of a given kind */
m_bush_t bush;
m_addr_t (*getp)(struct m_pool *);
void (*freep)(struct m_pool *, m_addr_t);
#define M_GETP() mp->getp(mp)
#define M_FREEP(p) mp->freep(mp, p)
#define GetPages() __GetFreePages(MEMO_GFP_FLAGS, MEMO_PAGE_ORDER)
#define FreePages(p) free_pages(p, MEMO_PAGE_ORDER)
int nump;
m_vtob_s *(vtob[VTOB_HASH_SIZE]);
struct m_pool *next;
struct m_link h[PAGE_SHIFT-MEMO_SHIFT+MEMO_PAGE_ORDER+1];
} m_pool_s;
static void *___m_alloc(m_pool_s *mp, int size)
{
int i = 0;
int s = (1 << MEMO_SHIFT);
int j;
m_addr_t a;
m_link_s *h = mp->h;
if (size > (PAGE_SIZE << MEMO_PAGE_ORDER))
return NULL;
while (size > s) {
s <<= 1;
++i;
}
j = i;
while (!h[j].next) {
if (s == (PAGE_SIZE << MEMO_PAGE_ORDER)) {
h[j].next = (m_link_s *) M_GETP();
if (h[j].next)
h[j].next->next = NULL;
break;
}
++j;
s <<= 1;
}
a = (m_addr_t) h[j].next;
if (a) {
h[j].next = h[j].next->next;
while (j > i) {
j -= 1;
s >>= 1;
h[j].next = (m_link_s *) (a+s);
h[j].next->next = NULL;
}
}
#ifdef DEBUG
printk("___m_alloc(%d) = %p\n", size, (void *) a);
#endif
return (void *) a;
}
static void ___m_free(m_pool_s *mp, void *ptr, int size)
{
int i = 0;
int s = (1 << MEMO_SHIFT);
m_link_s *q;
m_addr_t a, b;
m_link_s *h = mp->h;
#ifdef DEBUG
printk("___m_free(%p, %d)\n", ptr, size);
#endif
if (size > (PAGE_SIZE << MEMO_PAGE_ORDER))
return;
while (size > s) {
s <<= 1;
++i;
}
a = (m_addr_t) ptr;
while (1) {
#ifdef MEMO_FREE_UNUSED
if (s == (PAGE_SIZE << MEMO_PAGE_ORDER)) {
M_FREEP(a);
break;
}
#endif
b = a ^ s;
q = &h[i];
while (q->next && q->next != (m_link_s *) b) {
q = q->next;
}
if (!q->next) {
((m_link_s *) a)->next = h[i].next;
h[i].next = (m_link_s *) a;
break;
}
q->next = q->next->next;
a = a & b;
s <<= 1;
++i;
}
}
static void *__m_calloc2(m_pool_s *mp, int size, char *name, int uflags)
{
void *p;
p = ___m_alloc(mp, size);
if (DEBUG_FLAGS & DEBUG_ALLOC)
printk ("new %-10s[%4d] @%p.\n", name, size, p);
if (p)
bzero(p, size);
else if (uflags & MEMO_WARN)
printk (NAME53C8XX ": failed to allocate %s[%d]\n", name, size);
return p;
}
#define __m_calloc(mp, s, n) __m_calloc2(mp, s, n, MEMO_WARN)
static void __m_free(m_pool_s *mp, void *ptr, int size, char *name)
{
if (DEBUG_FLAGS & DEBUG_ALLOC)
printk ("freeing %-10s[%4d] @%p.\n", name, size, ptr);
___m_free(mp, ptr, size);
}
/*
* With pci bus iommu support, we use a default pool of unmapped memory
* for memory we donnot need to DMA from/to and one pool per pcidev for
* memory accessed by the PCI chip. `mp0' is the default not DMAable pool.
*/
static m_addr_t ___mp0_getp(m_pool_s *mp)
{
m_addr_t m = GetPages();
if (m)
++mp->nump;
return m;
}
static void ___mp0_freep(m_pool_s *mp, m_addr_t m)
{
FreePages(m);
--mp->nump;
}
static m_pool_s mp0 = {NULL, ___mp0_getp, ___mp0_freep};
/*
* DMAable pools.
*/
/*
* With pci bus iommu support, we maintain one pool per pcidev and a
* hashed reverse table for virtual to bus physical address translations.
*/
static m_addr_t ___dma_getp(m_pool_s *mp)
{
m_addr_t vp;
m_vtob_s *vbp;
vbp = __m_calloc(&mp0, sizeof(*vbp), "VTOB");
if (vbp) {
dma_addr_t daddr;
vp = (m_addr_t) dma_alloc_coherent(mp->bush,
PAGE_SIZE<<MEMO_PAGE_ORDER,
&daddr, GFP_ATOMIC);
if (vp) {
int hc = VTOB_HASH_CODE(vp);
vbp->vaddr = vp;
vbp->baddr = daddr;
vbp->next = mp->vtob[hc];
mp->vtob[hc] = vbp;
++mp->nump;
return vp;
}
}
if (vbp)
__m_free(&mp0, vbp, sizeof(*vbp), "VTOB");
return 0;
}
static void ___dma_freep(m_pool_s *mp, m_addr_t m)
{
m_vtob_s **vbpp, *vbp;
int hc = VTOB_HASH_CODE(m);
vbpp = &mp->vtob[hc];
while (*vbpp && (*vbpp)->vaddr != m)
vbpp = &(*vbpp)->next;
if (*vbpp) {
vbp = *vbpp;
*vbpp = (*vbpp)->next;
dma_free_coherent(mp->bush, PAGE_SIZE<<MEMO_PAGE_ORDER,
(void *)vbp->vaddr, (dma_addr_t)vbp->baddr);
__m_free(&mp0, vbp, sizeof(*vbp), "VTOB");
--mp->nump;
}
}
static inline m_pool_s *___get_dma_pool(m_bush_t bush)
{
m_pool_s *mp;
for (mp = mp0.next; mp && mp->bush != bush; mp = mp->next);
return mp;
}
static m_pool_s *___cre_dma_pool(m_bush_t bush)
{
m_pool_s *mp;
mp = __m_calloc(&mp0, sizeof(*mp), "MPOOL");
if (mp) {
bzero(mp, sizeof(*mp));
mp->bush = bush;
mp->getp = ___dma_getp;
mp->freep = ___dma_freep;
mp->next = mp0.next;
mp0.next = mp;
}
return mp;
}
static void ___del_dma_pool(m_pool_s *p)
{
struct m_pool **pp = &mp0.next;
while (*pp && *pp != p)
pp = &(*pp)->next;
if (*pp) {
*pp = (*pp)->next;
__m_free(&mp0, p, sizeof(*p), "MPOOL");
}
}
static void *__m_calloc_dma(m_bush_t bush, int size, char *name)
{
u_long flags;
struct m_pool *mp;
void *m = NULL;
NCR_LOCK_DRIVER(flags);
mp = ___get_dma_pool(bush);
if (!mp)
mp = ___cre_dma_pool(bush);
if (mp)
m = __m_calloc(mp, size, name);
if (mp && !mp->nump)
___del_dma_pool(mp);
NCR_UNLOCK_DRIVER(flags);
return m;
}
static void __m_free_dma(m_bush_t bush, void *m, int size, char *name)
{
u_long flags;
struct m_pool *mp;
NCR_LOCK_DRIVER(flags);
mp = ___get_dma_pool(bush);
if (mp)
__m_free(mp, m, size, name);
if (mp && !mp->nump)
___del_dma_pool(mp);
NCR_UNLOCK_DRIVER(flags);
}
static m_addr_t __vtobus(m_bush_t bush, void *m)
{
u_long flags;
m_pool_s *mp;
int hc = VTOB_HASH_CODE(m);
m_vtob_s *vp = NULL;
m_addr_t a = ((m_addr_t) m) & ~MEMO_CLUSTER_MASK;
NCR_LOCK_DRIVER(flags);
mp = ___get_dma_pool(bush);
if (mp) {
vp = mp->vtob[hc];
while (vp && (m_addr_t) vp->vaddr != a)
vp = vp->next;
}
NCR_UNLOCK_DRIVER(flags);
return vp ? vp->baddr + (((m_addr_t) m) - a) : 0;
}
#define _m_calloc_dma(np, s, n) __m_calloc_dma(np->dev, s, n)
#define _m_free_dma(np, p, s, n) __m_free_dma(np->dev, p, s, n)
#define m_calloc_dma(s, n) _m_calloc_dma(np, s, n)
#define m_free_dma(p, s, n) _m_free_dma(np, p, s, n)
#define _vtobus(np, p) __vtobus(np->dev, p)
#define vtobus(p) _vtobus(np, p)
/*
* Deal with DMA mapping/unmapping.
*/
/* To keep track of the dma mapping (sg/single) that has been set */
#define __data_mapped SCp.phase
#define __data_mapping SCp.have_data_in
static void __unmap_scsi_data(struct device *dev, Scsi_Cmnd *cmd)
{
enum dma_data_direction dma_dir =
(enum dma_data_direction)scsi_to_pci_dma_dir(cmd->sc_data_direction);
switch(cmd->__data_mapped) {
case 2:
dma_unmap_sg(dev, cmd->buffer, cmd->use_sg, dma_dir);
break;
case 1:
dma_unmap_single(dev, cmd->__data_mapping,
cmd->request_bufflen, dma_dir);
break;
}
cmd->__data_mapped = 0;
}
static u_long __map_scsi_single_data(struct device *dev, Scsi_Cmnd *cmd)
{
dma_addr_t mapping;
enum dma_data_direction dma_dir =
(enum dma_data_direction)scsi_to_pci_dma_dir(cmd->sc_data_direction);
if (cmd->request_bufflen == 0)
return 0;
mapping = dma_map_single(dev, cmd->request_buffer,
cmd->request_bufflen, dma_dir);
cmd->__data_mapped = 1;
cmd->__data_mapping = mapping;
return mapping;
}
static int __map_scsi_sg_data(struct device *dev, Scsi_Cmnd *cmd)
{
int use_sg;
enum dma_data_direction dma_dir =
(enum dma_data_direction)scsi_to_pci_dma_dir(cmd->sc_data_direction);
if (cmd->use_sg == 0)
return 0;
use_sg = dma_map_sg(dev, cmd->buffer, cmd->use_sg, dma_dir);
cmd->__data_mapped = 2;
cmd->__data_mapping = use_sg;
return use_sg;
}
static void __sync_scsi_data_for_cpu(struct device *dev, Scsi_Cmnd *cmd)
{
enum dma_data_direction dma_dir =
(enum dma_data_direction)scsi_to_pci_dma_dir(cmd->sc_data_direction);
switch(cmd->__data_mapped) {
case 2:
dma_sync_sg_for_cpu(dev, cmd->buffer, cmd->use_sg, dma_dir);
break;
case 1:
dma_sync_single_for_cpu(dev, cmd->__data_mapping,
cmd->request_bufflen, dma_dir);
break;
}
}
static void __sync_scsi_data_for_device(struct device *dev, Scsi_Cmnd *cmd)
{
enum dma_data_direction dma_dir =
(enum dma_data_direction)scsi_to_pci_dma_dir(cmd->sc_data_direction);
switch(cmd->__data_mapped) {
case 2:
dma_sync_sg_for_device(dev, cmd->buffer, cmd->use_sg, dma_dir);
break;
case 1:
dma_sync_single_for_device(dev, cmd->__data_mapping,
cmd->request_bufflen, dma_dir);
break;
}
}
#define scsi_sg_dma_address(sc) sg_dma_address(sc)
#define scsi_sg_dma_len(sc) sg_dma_len(sc)
#define unmap_scsi_data(np, cmd) __unmap_scsi_data(np->dev, cmd)
#define map_scsi_single_data(np, cmd) __map_scsi_single_data(np->dev, cmd)
#define map_scsi_sg_data(np, cmd) __map_scsi_sg_data(np->dev, cmd)
#define sync_scsi_data_for_cpu(np, cmd) __sync_scsi_data_for_cpu(np->dev, cmd)
#define sync_scsi_data_for_device(np, cmd) __sync_scsi_data_for_device(np->dev, cmd)
#define scsi_data_direction(cmd) (cmd->sc_data_direction)
/*==========================================================
**
** Driver setup.
**
** This structure is initialized from linux config
** options. It can be overridden at boot-up by the boot
** command line.
**
**==========================================================
*/
static struct ncr_driver_setup
driver_setup = SCSI_NCR_DRIVER_SETUP;
#ifdef SCSI_NCR_BOOT_COMMAND_LINE_SUPPORT
static struct ncr_driver_setup
driver_safe_setup __initdata = SCSI_NCR_DRIVER_SAFE_SETUP;
#endif
#define initverbose (driver_setup.verbose)
#define bootverbose (np->verbose)
/*===================================================================
**
** Utility routines that protperly return data through /proc FS.
**
**===================================================================
*/
#ifdef SCSI_NCR_USER_INFO_SUPPORT
struct info_str
{
char *buffer;
int length;
int offset;
int pos;
};
static void copy_mem_info(struct info_str *info, char *data, int len)
{
if (info->pos + len > info->length)
len = info->length - info->pos;
if (info->pos + len < info->offset) {
info->pos += len;
return;
}
if (info->pos < info->offset) {
data += (info->offset - info->pos);
len -= (info->offset - info->pos);
}
if (len > 0) {
memcpy(info->buffer + info->pos, data, len);
info->pos += len;
}
}
static int copy_info(struct info_str *info, char *fmt, ...)
{
va_list args;
char buf[81];
int len;
va_start(args, fmt);
len = vsprintf(buf, fmt, args);
va_end(args);
copy_mem_info(info, buf, len);
return len;
}
#endif
/*===================================================================
**
** Driver setup from the boot command line
**
**===================================================================
*/
#ifdef MODULE
#define ARG_SEP ' '
#else
#define ARG_SEP ','
#endif
#define OPT_TAGS 1
#define OPT_MASTER_PARITY 2
#define OPT_SCSI_PARITY 3
#define OPT_DISCONNECTION 4
#define OPT_SPECIAL_FEATURES 5
#define OPT_UNUSED_1 6
#define OPT_FORCE_SYNC_NEGO 7
#define OPT_REVERSE_PROBE 8
#define OPT_DEFAULT_SYNC 9
#define OPT_VERBOSE 10
#define OPT_DEBUG 11
#define OPT_BURST_MAX 12
#define OPT_LED_PIN 13
#define OPT_MAX_WIDE 14
#define OPT_SETTLE_DELAY 15
#define OPT_DIFF_SUPPORT 16
#define OPT_IRQM 17
#define OPT_PCI_FIX_UP 18
#define OPT_BUS_CHECK 19
#define OPT_OPTIMIZE 20
#define OPT_RECOVERY 21
#define OPT_SAFE_SETUP 22
#define OPT_USE_NVRAM 23
#define OPT_EXCLUDE 24
#define OPT_HOST_ID 25
#ifdef SCSI_NCR_IARB_SUPPORT
#define OPT_IARB 26
#endif
static char setup_token[] __initdata =
"tags:" "mpar:"
"spar:" "disc:"
"specf:" "ultra:"
"fsn:" "revprob:"
"sync:" "verb:"
"debug:" "burst:"
"led:" "wide:"
"settle:" "diff:"
"irqm:" "pcifix:"
"buschk:" "optim:"
"recovery:"
"safe:" "nvram:"
"excl:" "hostid:"
#ifdef SCSI_NCR_IARB_SUPPORT
"iarb:"
#endif
; /* DONNOT REMOVE THIS ';' */
#ifdef MODULE
#define ARG_SEP ' '
#else
#define ARG_SEP ','
#endif
static int __init get_setup_token(char *p)
{
char *cur = setup_token;
char *pc;
int i = 0;
while (cur != NULL && (pc = strchr(cur, ':')) != NULL) {
++pc;
++i;
if (!strncmp(p, cur, pc - cur))
return i;
cur = pc;
}
return 0;
}
static int __init sym53c8xx__setup(char *str)
{
#ifdef SCSI_NCR_BOOT_COMMAND_LINE_SUPPORT
char *cur = str;
char *pc, *pv;
int i, val, c;
int xi = 0;
while (cur != NULL && (pc = strchr(cur, ':')) != NULL) {
char *pe;
val = 0;
pv = pc;
c = *++pv;
if (c == 'n')
val = 0;
else if (c == 'y')
val = 1;
else
val = (int) simple_strtoul(pv, &pe, 0);
switch (get_setup_token(cur)) {
case OPT_TAGS:
driver_setup.default_tags = val;
if (pe && *pe == '/') {
i = 0;
while (*pe && *pe != ARG_SEP &&
i < sizeof(driver_setup.tag_ctrl)-1) {
driver_setup.tag_ctrl[i++] = *pe++;
}
driver_setup.tag_ctrl[i] = '\0';
}
break;
case OPT_MASTER_PARITY:
driver_setup.master_parity = val;
break;
case OPT_SCSI_PARITY:
driver_setup.scsi_parity = val;
break;
case OPT_DISCONNECTION:
driver_setup.disconnection = val;
break;
case OPT_SPECIAL_FEATURES:
driver_setup.special_features = val;
break;
case OPT_FORCE_SYNC_NEGO:
driver_setup.force_sync_nego = val;
break;
case OPT_REVERSE_PROBE:
driver_setup.reverse_probe = val;
break;
case OPT_DEFAULT_SYNC:
driver_setup.default_sync = val;
break;
case OPT_VERBOSE:
driver_setup.verbose = val;
break;
case OPT_DEBUG:
driver_setup.debug = val;
break;
case OPT_BURST_MAX:
driver_setup.burst_max = val;
break;
case OPT_LED_PIN:
driver_setup.led_pin = val;
break;
case OPT_MAX_WIDE:
driver_setup.max_wide = val? 1:0;
break;
case OPT_SETTLE_DELAY:
driver_setup.settle_delay = val;
break;
case OPT_DIFF_SUPPORT:
driver_setup.diff_support = val;
break;
case OPT_IRQM:
driver_setup.irqm = val;
break;
case OPT_PCI_FIX_UP:
driver_setup.pci_fix_up = val;
break;
case OPT_BUS_CHECK:
driver_setup.bus_check = val;
break;
case OPT_OPTIMIZE:
driver_setup.optimize = val;
break;
case OPT_RECOVERY:
driver_setup.recovery = val;
break;
case OPT_USE_NVRAM:
driver_setup.use_nvram = val;
break;
case OPT_SAFE_SETUP:
memcpy(&driver_setup, &driver_safe_setup,
sizeof(driver_setup));
break;
case OPT_EXCLUDE:
if (xi < SCSI_NCR_MAX_EXCLUDES)
driver_setup.excludes[xi++] = val;
break;
case OPT_HOST_ID:
driver_setup.host_id = val;
break;
#ifdef SCSI_NCR_IARB_SUPPORT
case OPT_IARB:
driver_setup.iarb = val;
break;
#endif
default:
printk("sym53c8xx_setup: unexpected boot option '%.*s' ignored\n", (int)(pc-cur+1), cur);
break;
}
if ((cur = strchr(cur, ARG_SEP)) != NULL)
++cur;
}
#endif /* SCSI_NCR_BOOT_COMMAND_LINE_SUPPORT */
return 1;
}
/*===================================================================
**
** Get device queue depth from boot command line.
**
**===================================================================
*/
#define DEF_DEPTH (driver_setup.default_tags)
#define ALL_TARGETS -2
#define NO_TARGET -1
#define ALL_LUNS -2
#define NO_LUN -1
static int device_queue_depth(int unit, int target, int lun)
{
int c, h, t, u, v;
char *p = driver_setup.tag_ctrl;
char *ep;
h = -1;
t = NO_TARGET;
u = NO_LUN;
while ((c = *p++) != 0) {
v = simple_strtoul(p, &ep, 0);
switch(c) {
case '/':
++h;
t = ALL_TARGETS;
u = ALL_LUNS;
break;
case 't':
if (t != target)
t = (target == v) ? v : NO_TARGET;
u = ALL_LUNS;
break;
case 'u':
if (u != lun)
u = (lun == v) ? v : NO_LUN;
break;
case 'q':
if (h == unit &&
(t == ALL_TARGETS || t == target) &&
(u == ALL_LUNS || u == lun))
return v;
break;
case '-':
t = ALL_TARGETS;
u = ALL_LUNS;
break;
default:
break;
}
p = ep;
}
return DEF_DEPTH;
}
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