aboutsummaryrefslogtreecommitdiff
path: root/drivers/scsi/ncr53c8xx.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/scsi/ncr53c8xx.c')
-rw-r--r--drivers/scsi/ncr53c8xx.c734
1 files changed, 733 insertions, 1 deletions
diff --git a/drivers/scsi/ncr53c8xx.c b/drivers/scsi/ncr53c8xx.c
index 8e1c77c81f6..32350707b94 100644
--- a/drivers/scsi/ncr53c8xx.c
+++ b/drivers/scsi/ncr53c8xx.c
@@ -131,7 +131,739 @@
#define NAME53C "ncr53c"
#define NAME53C8XX "ncr53c8xx"
-#include "sym53c8xx_comm.h"
+
+/*==========================================================
+**
+** 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;
+}
+
+/*==========================================================
+**
+** 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;
+}
/*==========================================================
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-01 06:19:07 +0000