patch-2.0.28 linux/drivers/scsi/eata.c
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- Lines: 497
- Date:
Tue Jan 14 12:47:28 1997
- Orig file:
v2.0.27/linux/drivers/scsi/eata.c
- Orig date:
Mon Dec 30 16:01:47 1996
diff -u --recursive --new-file v2.0.27/linux/drivers/scsi/eata.c linux/drivers/scsi/eata.c
@@ -1,6 +1,13 @@
/*
* eata.c - Low-level driver for EATA/DMA SCSI host adapters.
*
+ * 8 Jan 1997 rev. 2.50 for linux 2.1.20 and 2.0.27
+ * Added linked command support.
+ * Improved detection of PCI boards using ISA base addresses.
+ *
+ * 3 Dec 1996 rev. 2.40 for linux 2.1.14 and 2.0.27
+ * Added support for tagged commands and queue depth adjustment.
+ *
* 22 Nov 1996 rev. 2.30 for linux 2.1.12 and 2.0.26
* When CONFIG_PCI is defined, BIOS32 is used to include in the
* list of i/o ports to be probed all the PCI SCSI controllers.
@@ -85,7 +92,7 @@
* This driver is based on the CAM (Common Access Method Committee)
* EATA (Enhanced AT Bus Attachment) rev. 2.0A, using DMA protocol.
*
- * Copyright (C) 1994, 1995, 1996 Dario Ballabio (dario@milano.europe.dg.com)
+ * Copyright (C) 1994-1997 Dario Ballabio (dario@milano.europe.dg.com)
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that redistributions of source
@@ -121,6 +128,15 @@
* PCI support has been tested using up to 2 DPT PM3224W (DPT SCSI BIOS
* v003.D0, firmware v07G.0).
*
+ * DPT SmartRAID boards support "Hardware Array" - a group of disk drives
+ * which are all members of the same RAID-1 or RAID-5 array implemented
+ * in host adapter hardware. Hardware Arrays are fully compatible with this
+ * driver, since they look to it as a single disk drive.
+ * By contrast RAID-0 are implemented as "Array Group", which does not
+ * seem to be supported correctly by the actual SCSI subsystem.
+ * To get RAID-0 functionality, the linux MD driver must be used instead of
+ * the DPT "Array Group" feature.
+ *
* Multiple ISA, EISA and PCI boards can be configured in the same system.
* It is suggested to put all the EISA boards on the same IRQ level, all
* the PCI boards on another IRQ level, while ISA boards cannot share
@@ -199,6 +215,7 @@
#undef FORCE_CONFIG
+#undef DEBUG_LINKED_COMMANDS
#undef DEBUG_DETECT
#undef DEBUG_INTERRUPT
#undef DEBUG_STATISTICS
@@ -218,6 +235,7 @@
#define MAX_LARGE_SGLIST 252
#define MAX_INTERNAL_RETRIES 64
#define MAX_CMD_PER_LUN 2
+#define MAX_TAGGED_CMD_PER_LUN 16
#define SKIP 1
#define FALSE 0
@@ -227,6 +245,8 @@
#define LOCKED 2
#define IN_RESET 3
#define IGNORE 4
+#define READY 5
+#define ABORTING 6
#define NO_DMA 0xff
#define MAXLOOP 200000
@@ -241,8 +261,9 @@
#define REG_MID 4
#define REG_MSB 5
#define REGION_SIZE 9
-#define ISA_RANGE 0x0fff
-#define EISA_RANGE 0xfc88
+#define MAX_ISA_ADDR 0x03ff
+#define MIN_EISA_ADDR 0x1c88
+#define MAX_EISA_ADDR 0xfc88
#define BSY_ASSERTED 0x80
#define DRQ_ASSERTED 0x08
#define ABSY_ASSERTED 0x01
@@ -369,6 +390,7 @@
ulong sp_addr; /* Address where sp is DMA'ed when cp completes */
ulong sense_addr; /* Address where Sense Data is DMA'ed on error */
unsigned int index; /* cp index */
+ unsigned int link_id; /* reference cp for linked commands */
struct sg_list *sglist;
};
@@ -427,6 +449,75 @@
static int do_trace = FALSE;
static int setup_done = FALSE;
+#if defined (CONFIG_SCSI_EATA_TAGGED_QUEUE)
+static int tagged_commands = TRUE;
+#else
+static int tagged_commands = FALSE;
+#endif
+
+#if defined (CONFIG_SCSI_EATA_LINKED_COMMANDS)
+static int linked_commands = TRUE;
+#else
+static int linked_commands = FALSE;
+#endif
+
+#if defined CONFIG_SCSI_EATA_MAX_TAGS
+static int max_queue_depth = CONFIG_SCSI_EATA_MAX_TAGS;
+#else
+static int max_queue_depth = MAX_CMD_PER_LUN;
+#endif
+
+static void select_queue_depths(struct Scsi_Host *host, Scsi_Device *devlist) {
+ Scsi_Device *dev;
+ int j, ntag = 0, nuntag = 0, tqd, utqd;
+ unsigned long flags;
+
+ save_flags(flags);
+ cli();
+
+ j = ((struct hostdata *) host->hostdata)->board_number;
+
+ for(dev = devlist; dev; dev = dev->next) {
+
+ if (dev->host != host) continue;
+
+ if (dev->tagged_supported) ntag++;
+ else nuntag++;
+ }
+
+ utqd = MAX_CMD_PER_LUN;
+
+ tqd = (host->can_queue - utqd * nuntag) / (ntag + 1);
+
+ if (tqd > max_queue_depth) tqd = max_queue_depth;
+
+ if (tqd < MAX_CMD_PER_LUN) tqd = MAX_CMD_PER_LUN;
+
+ for(dev = devlist; dev; dev = dev->next) {
+ char *tag_suffix = "";
+
+ if (dev->host != host) continue;
+
+ if (dev->tagged_supported) dev->queue_depth = tqd;
+ else dev->queue_depth = utqd;
+
+ if (tagged_commands && dev->tagged_supported) {
+ dev->tagged_queue = 1;
+ dev->current_tag = 1;
+ }
+
+ if (dev->tagged_supported && dev->tagged_queue) tag_suffix = ", tagged";
+ else if (dev->tagged_supported) tag_suffix = ", untagged";
+
+ printk("%s: scsi%d, channel %d, id %d, lun %d, cmds/lun %d%s.\n",
+ BN(j), host->host_no, dev->channel, dev->id, dev->lun,
+ dev->queue_depth, tag_suffix);
+ }
+
+ restore_flags(flags);
+ return;
+}
+
static inline int wait_on_busy(unsigned int iobase) {
unsigned int loop = MAXLOOP;
@@ -472,7 +563,7 @@
unsigned char irq, dma_channel, subversion, i;
unsigned char protocol_rev;
struct eata_info info;
- char *bus_type;
+ char *bus_type, dma_name[16];
/* Allowed DMA channels for ISA (0 indicates reserved) */
unsigned char dma_channel_table[4] = { 5, 6, 7, 0 };
@@ -507,34 +598,59 @@
else
protocol_rev = 'C';
- irq = info.irq;
-
- if (port_base > ISA_RANGE) {
-
- if (!info.haaval || info.ata || info.drqvld) {
- printk("%s: unusable EISA/PCI board found (%d%d%d), detaching.\n",
- name, info.haaval, info.ata, info.drqvld);
- return FALSE;
- }
-
+ if (!setup_done && j > 0 && j <= MAX_PCI) {
+ bus_type = "PCI";
+ subversion = ESA;
+ }
+ else if (port_base > MAX_EISA_ADDR || (protocol_rev == 'C' && info.pci)) {
+ bus_type = "PCI";
+ subversion = ESA;
+ }
+ else if (port_base >= MIN_EISA_ADDR || (protocol_rev == 'C' && info.eisa)) {
+ bus_type = "EISA";
+ subversion = ESA;
+ }
+ else if (protocol_rev == 'C' && !info.eisa && !info.pci) {
+ bus_type = "ISA";
+ subversion = ISA;
+ }
+ else if (port_base > MAX_ISA_ADDR) {
+ bus_type = "PCI";
subversion = ESA;
- dma_channel = NO_DMA;
}
else {
+ bus_type = "ISA";
+ subversion = ISA;
+ }
- if (!info.haaval || info.ata || !info.drqvld) {
- printk("%s: unusable ISA board found (%d%d%d), detaching.\n",
- name, info.haaval, info.ata, info.drqvld);
- return FALSE;
- }
+ if (!info.haaval || info.ata) {
+ printk("%s: address 0x%03x, unusable %s board (%d%d), detaching.\n",
+ name, port_base, bus_type, info.haaval, info.ata);
+ return FALSE;
+ }
+
+ if (info.drqvld) {
+
+ if (subversion == ESA)
+ printk("%s: warning, weird %s board using DMA.\n", name, bus_type);
subversion = ISA;
dma_channel = dma_channel_table[3 - info.drqx];
}
+ else {
+
+ if (subversion == ISA)
+ printk("%s: warning, weird %s board not using DMA.\n", name, bus_type);
+
+ subversion = ESA;
+ dma_channel = NO_DMA;
+ }
if (!info.dmasup)
printk("%s: warning, DMA protocol support not asserted.\n", name);
+ irq = info.irq;
+
if (subversion == ESA && !info.irq_tr)
printk("%s: warning, LEVEL triggering is suggested for IRQ %u.\n",
name, irq);
@@ -590,6 +706,7 @@
sh[j]->this_id = (ushort) info.host_addr[3];
sh[j]->can_queue = (ushort) ntohs(info.queue_size);
sh[j]->cmd_per_lun = MAX_CMD_PER_LUN;
+ sh[j]->select_queue_depths = select_queue_depths;
/* Register the I/O space that we use */
request_region(sh[j]->io_port, sh[j]->n_io_port, driver_name);
@@ -645,10 +762,8 @@
sh[j]->max_lun = info.max_lun + 1;
}
- if (subversion == ESA && protocol_rev == 'C' && info.pci) bus_type = "PCI";
- else if (sh[j]->io_port > EISA_RANGE) bus_type = "PCI";
- else if (subversion == ESA) bus_type = "EISA";
- else bus_type = "ISA";
+ if (dma_channel == NO_DMA) sprintf(dma_name, "%s", "NO DMA");
+ else sprintf(dma_name, "DMA %u", dma_channel);
for (i = 0; i < sh[j]->can_queue; i++)
if (! ((&HD(j)->cp[i])->sglist = kmalloc(
@@ -659,10 +774,15 @@
return FALSE;
}
- printk("%s: rev. 2.0%c, %s, PORT 0x%03x, IRQ %u, DMA %u, SG %d, "\
- "Mbox %d, CmdLun %d.\n", BN(j), HD(j)->protocol_rev, bus_type,
- sh[j]->io_port, sh[j]->irq, sh[j]->dma_channel,
- sh[j]->sg_tablesize, sh[j]->can_queue, sh[j]->cmd_per_lun);
+ if (max_queue_depth > MAX_TAGGED_CMD_PER_LUN)
+ max_queue_depth = MAX_TAGGED_CMD_PER_LUN;
+
+ if (max_queue_depth < MAX_CMD_PER_LUN) max_queue_depth = MAX_CMD_PER_LUN;
+
+ printk("%s: 2.0%c, %s 0x%03x, IRQ %u, %s, SG %d, MB %d, TC %d, LC %d, "\
+ "MQ %d.\n", BN(j), HD(j)->protocol_rev, bus_type, sh[j]->io_port,
+ sh[j]->irq, dma_name, sh[j]->sg_tablesize, sh[j]->can_queue,
+ tagged_commands, linked_commands, max_queue_depth);
if (sh[j]->max_id > 8 || sh[j]->max_lun > 8)
printk("%s: wide SCSI support enabled, max_id %u, max_lun %u.\n",
@@ -766,7 +886,7 @@
}
if (j > 0)
- printk("EATA/DMA 2.0x: Copyright (C) 1994, 1995, 1996 Dario Ballabio.\n");
+ printk("EATA/DMA 2.0x: Copyright (C) 1994-1997 Dario Ballabio.\n");
restore_flags(flags);
return j;
@@ -874,6 +994,17 @@
cpp->SCpnt = SCpnt;
cpp->sense_addr = V2DEV(SCpnt->sense_buffer);
cpp->sense_len = sizeof SCpnt->sense_buffer;
+
+ if (SCpnt->device->tagged_queue) {
+
+ if (HD(j)->target_redo[SCpnt->target][SCpnt->channel] ||
+ HD(j)->target_to[SCpnt->target][SCpnt->channel])
+ cpp->mess[0] = ORDERED_QUEUE_TAG;
+ else
+ cpp->mess[0] = SIMPLE_QUEUE_TAG;
+
+ cpp->mess[1] = SCpnt->device->current_tag++;
+ }
if (SCpnt->use_sg) {
cpp->sg = TRUE;
@@ -886,6 +1017,28 @@
memcpy(cpp->cdb, SCpnt->cmnd, SCpnt->cmd_len);
+ if (linked_commands && SCpnt->device->tagged_supported
+ && !HD(j)->target_to[SCpnt->target][SCpnt->channel]
+ && !HD(j)->target_redo[SCpnt->target][SCpnt->channel])
+
+ for (k = 0; k < sh[j]->can_queue; k++) {
+
+ if (HD(j)->cp_stat[k] != IN_USE) continue;
+
+ if ((&HD(j)->cp[k])->SCpnt->device != SCpnt->device) continue;
+
+ cpp->link_id = k;
+ HD(j)->cp_stat[i] = READY;
+
+#if defined (DEBUG_LINKED_COMMANDS)
+ printk("%s: qcomm, target %d.%d:%d, pid %ld, Mbox %d ready.\n",
+ BN(j), SCpnt->channel, SCpnt->target, SCpnt->lun,
+ SCpnt->pid, i);
+#endif
+ restore_flags(flags);
+ return 0;
+ }
+
/* Send control packet to the board */
if (do_dma(sh[j]->io_port, (unsigned int) cpp, SEND_CP_DMA)) {
SCpnt->result = DID_ERROR << 16;
@@ -962,6 +1115,18 @@
restore_flags(flags);
return SCSI_ABORT_NOT_RUNNING;
}
+
+ if (HD(j)->cp_stat[i] == READY || HD(j)->cp_stat[i] == ABORTING) {
+ SCarg->result = DID_ABORT << 16;
+ SCarg->host_scribble = NULL;
+ HD(j)->cp_stat[i] = FREE;
+ printk("%s, abort, mbox %d ready, DID_ABORT, pid %ld done.\n",
+ BN(j), i, SCarg->pid);
+ SCarg->scsi_done(SCarg);
+ restore_flags(flags);
+ return SCSI_ABORT_SUCCESS;
+ }
+
restore_flags(flags);
panic("%s: abort, mbox %d, invalid cp_stat.\n", BN(j), i);
}
@@ -1012,14 +1177,21 @@
continue;
}
- SCpnt = HD(j)->cp[i].SCpnt;
- HD(j)->cp_stat[i] = IN_RESET;
- printk("%s: reset, mbox %d in reset, pid %ld.\n",
- BN(j), i, SCpnt->pid);
-
- if (SCpnt == NULL)
+ if (!(SCpnt = HD(j)->cp[i].SCpnt))
panic("%s: reset, mbox %d, SCpnt == NULL.\n", BN(j), i);
+ if (HD(j)->cp_stat[i] == READY || HD(j)->cp_stat[i] == ABORTING) {
+ HD(j)->cp_stat[i] = ABORTING;
+ printk("%s: reset, mbox %d aborting, pid %ld.\n",
+ BN(j), i, SCpnt->pid);
+ }
+
+ else {
+ HD(j)->cp_stat[i] = IN_RESET;
+ printk("%s: reset, mbox %d in reset, pid %ld.\n",
+ BN(j), i, SCpnt->pid);
+ }
+
if (SCpnt->host_scribble == NULL)
panic("%s: reset, mbox %d, garbled SCpnt.\n", BN(j), i);
@@ -1053,18 +1225,35 @@
for (i = 0; i < sh[j]->can_queue; i++) {
- /* Skip mailboxes already set free by interrupt */
- if (HD(j)->cp_stat[i] != IN_RESET) continue;
+ if (HD(j)->cp_stat[i] == IN_RESET) {
+ SCpnt = HD(j)->cp[i].SCpnt;
+ SCpnt->result = DID_RESET << 16;
+ SCpnt->host_scribble = NULL;
- SCpnt = HD(j)->cp[i].SCpnt;
- SCpnt->result = DID_RESET << 16;
- SCpnt->host_scribble = NULL;
+ /* This mailbox is still waiting for its interrupt */
+ HD(j)->cp_stat[i] = LOCKED;
+
+ printk("%s, reset, mbox %d locked, DID_RESET, pid %ld done.\n",
+ BN(j), i, SCpnt->pid);
+ }
+
+ else if (HD(j)->cp_stat[i] == ABORTING) {
+ SCpnt = HD(j)->cp[i].SCpnt;
+ SCpnt->result = DID_RESET << 16;
+ SCpnt->host_scribble = NULL;
- /* This mailbox is still waiting for its interrupt */
- HD(j)->cp_stat[i] = LOCKED;
+ /* This mailbox was never queued to the adapter */
+ HD(j)->cp_stat[i] = FREE;
+
+ printk("%s, reset, mbox %d aborting, DID_RESET, pid %ld done.\n",
+ BN(j), i, SCpnt->pid);
+ }
+
+ else
+
+ /* Any other mailbox has already been set free by interrupt */
+ continue;
- printk("%s, reset, mbox %d locked, DID_RESET, pid %ld done.\n",
- BN(j), i, SCpnt->pid);
restore_flags(flags);
SCpnt->scsi_done(SCpnt);
cli();
@@ -1084,6 +1273,42 @@
}
}
+static inline void process_ready_list(unsigned int i, unsigned int j) {
+ Scsi_Cmnd *SCpnt;
+ unsigned int k, n_ready = 0;
+ struct mscp *cpp;
+
+ for (k = 0; k < sh[j]->can_queue; k++) {
+
+ if (HD(j)->cp_stat[k] != READY) continue;
+
+ cpp = &HD(j)->cp[k];
+
+ if (cpp->link_id != i) continue;
+
+ SCpnt = cpp->SCpnt;
+ n_ready++;
+
+ if (do_dma(sh[j]->io_port, (unsigned int) cpp, SEND_CP_DMA)) {
+ printk("%s: ihdlr, target %d.%d:%d, pid %ld, Mbox %d, link_id %d, "\
+ "n_ready %d, adapter busy, will abort.\n", BN(j),
+ SCpnt->channel, SCpnt->target, SCpnt->lun, SCpnt->pid,
+ k, i, n_ready);
+ HD(j)->cp_stat[k] = ABORTING;
+ continue;
+ }
+
+ HD(j)->cp_stat[k] = IN_USE;
+
+#if defined (DEBUG_LINKED_COMMANDS)
+ printk("%s: ihdlr, target %d.%d:%d, pid %ld, Mbox %d in use, link_id %d,"
+ " n_ready %d.\n", BN(j), SCpnt->channel, SCpnt->target,
+ SCpnt->lun, SCpnt->pid, k, i, n_ready);
+#endif
+ }
+
+}
+
static void eata2x_interrupt_handler(int irq, void *dev_id,
struct pt_regs *regs) {
Scsi_Cmnd *SCpnt;
@@ -1131,6 +1356,8 @@
spp->eoc = FALSE;
+ if (linked_commands) process_ready_list(i, j);
+
if (HD(j)->cp_stat[i] == IGNORE) {
HD(j)->cp_stat[i] = FREE;
continue;
@@ -1262,8 +1489,8 @@
#else
if ((spp->adapter_status != ASOK && HD(j)->iocount > 1000) ||
(spp->adapter_status != ASOK &&
- spp->adapter_status != ASST && HD(j)->iocount <= 1000) ||
- do_trace)
+ spp->adapter_status != ASST && HD(j)->iocount <= 1000) ||
+ do_trace || msg_byte(spp->target_status))
#endif
printk("%s: ihdlr, mbox %2d, err 0x%x:%x,"\
" target %d.%d:%d, pid %ld, count %d.\n",
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