Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 792 insertions, 0 deletions

diff --git a/drivers/scsi/sym53c8xx_comm.h b/drivers/scsi/sym53c8xx_comm.h
new file mode 100644
index 000000000000..20ae2b17df58
--- /dev/null
+++ b/drivers/scsi/sym53c8xx_comm.h
@@ -0,0 +1,792 @@
+/******************************************************************************
+**  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>
+**
+*******************************************************************************
+*/
+
+/*==========================================================
+**
+**      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
+
+static inline struct list_head *ncr_list_pop(struct list_head *head)
+{
+        if (!list_empty(head)) {
+                struct list_head *elem = head->next;
+
+                list_del(elem);
+                return elem;
+        }
+
+        return NULL;
+}
+
+#ifdef __sparc__
+#include <asm/irq.h>
+#endif
+
+/*==========================================================
+**
+**      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 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);
+        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 *)mp->getp(mp);
+                        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)) {
+                        mp->freep(mp, 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 DEFINE_SPINLOCK(ncr53c8xx_lock);
+
+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)
+                memset(p, 0, 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 = __get_free_pages(MEMO_GFP_FLAGS, MEMO_PAGE_ORDER);
+        if (m)
+                ++mp->nump;
+        return m;
+}
+
+static void ___mp0_freep(m_pool_s *mp, m_addr_t m)
+{
+        free_pages(m, MEMO_PAGE_ORDER);
+        --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) {
+                memset(mp, 0, 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;
+
+        spin_lock_irqsave(&ncr53c8xx_lock, 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);
+        spin_unlock_irqrestore(&ncr53c8xx_lock, 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;
+
+        spin_lock_irqsave(&ncr53c8xx_lock, flags);
+        mp = ___get_dma_pool(bush);
+        if (mp)
+                __m_free(mp, m, size, name);
+        if (mp && !mp->nump)
+                ___del_dma_pool(mp);
+        spin_unlock_irqrestore(&ncr53c8xx_lock, 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;
+
+        spin_lock_irqsave(&ncr53c8xx_lock, flags);
+        mp = ___get_dma_pool(bush);
+        if (mp) {
+                vp = mp->vtob[hc];
+                while (vp && (m_addr_t) vp->vaddr != a)
+                        vp = vp->next;
+        }
+        spin_unlock_irqrestore(&ncr53c8xx_lock, 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, struct scsi_cmnd *cmd)
+{
+        switch(cmd->__data_mapped) {
+        case 2:
+                dma_unmap_sg(dev, cmd->buffer, cmd->use_sg,
+                                cmd->sc_data_direction);
+                break;
+        case 1:
+                dma_unmap_single(dev, cmd->__data_mapping,
+                                 cmd->request_bufflen,
+                                 cmd->sc_data_direction);
+                break;
+        }
+        cmd->__data_mapped = 0;
+}
+
+static u_long __map_scsi_single_data(struct device *dev, struct scsi_cmnd *cmd)
+{
+        dma_addr_t mapping;
+
+        if (cmd->request_bufflen == 0)
+                return 0;
+
+        mapping = dma_map_single(dev, cmd->request_buffer,
+                                 cmd->request_bufflen,
+                                 cmd->sc_data_direction);
+        cmd->__data_mapped = 1;
+        cmd->__data_mapping = mapping;
+
+        return mapping;
+}
+
+static int __map_scsi_sg_data(struct device *dev, struct scsi_cmnd *cmd)
+{
+        int use_sg;
+
+        if (cmd->use_sg == 0)
+                return 0;
+
+        use_sg = dma_map_sg(dev, cmd->buffer, cmd->use_sg,
+                        cmd->sc_data_direction);
+        cmd->__data_mapped = 2;
+        cmd->__data_mapping = use_sg;
+
+        return use_sg;
+}
+
+#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)
+
+/*==========================================================
+**
+**      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)
+
+
+/*===================================================================
+**
+**      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;
+}