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[TC] dec_esp: Driver model for the PMAZ-A 

This is a set of changes that converts the PMAZ-A support to the driver model.

The use of the driver model required switching to the hotplug SCSI
initialization model, which in turn required a change to the core NCR53C9x
driver.  I decided not to break all the frontend drivers and introduced an
additional parameter for esp_allocate() to select between the old and the new
model.  I hope this is OK, but I would be fine with converting NCR53C9x to the
new model unconditionally as long as I do not have to fix all the other
frontends (OK, perhaps I could do some of them ;-) ).

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Maciej W. Rozycki 2007-02-05 16:28:29 -08:00 committed by Ralf Baechle
parent 335dc50cec
commit 4df4db5c6c
13 changed files with 253 additions and 139 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/scsi/NCR53C9x.c
View File

@ -528,12 +528,16 @@ void esp_bootup_reset(struct NCR_ESP *esp, struct ESP_regs *eregs)
/* Allocate structure and insert basic data such as SCSI chip frequency
* data and a pointer to the device
*/
struct NCR_ESP* esp_allocate(struct scsi_host_template *tpnt, void *esp_dev)
struct NCR_ESP* esp_allocate(struct scsi_host_template *tpnt, void *esp_dev,
int hotplug)
{
struct NCR_ESP *esp, *elink;
struct Scsi_Host *esp_host;
esp_host = scsi_register(tpnt, sizeof(struct NCR_ESP));
if (hotplug)
esp_host = scsi_host_alloc(tpnt, sizeof(struct NCR_ESP));
else
esp_host = scsi_register(tpnt, sizeof(struct NCR_ESP));
if(!esp_host)
panic("Cannot register ESP SCSI host");
esp = (struct NCR_ESP *) esp_host->hostdata;

2
drivers/scsi/NCR53C9x.h
View File

@ -652,7 +652,7 @@ extern int nesps, esps_in_use, esps_running;
/* External functions */
extern void esp_bootup_reset(struct NCR_ESP *esp, struct ESP_regs *eregs);
extern struct NCR_ESP *esp_allocate(struct scsi_host_template *, void *);
extern struct NCR_ESP *esp_allocate(struct scsi_host_template *, void *, int);
extern void esp_deallocate(struct NCR_ESP *);
extern void esp_release(void);
extern void esp_initialize(struct NCR_ESP *);

3
drivers/scsi/blz1230.c
View File

@ -121,7 +121,8 @@ int __init blz1230_esp_detect(struct scsi_host_template *tpnt)
*/
address = ZTWO_VADDR(board);
eregs = (struct ESP_regs *)(address + REAL_BLZ1230_ESP_ADDR);
esp = esp_allocate(tpnt, (void *)board+REAL_BLZ1230_ESP_ADDR);
esp = esp_allocate(tpnt, (void *)board + REAL_BLZ1230_ESP_ADDR,
0);
esp_write(eregs->esp_cfg1, (ESP_CONFIG1_PENABLE | 7));
udelay(5);

2
drivers/scsi/blz2060.c
View File

@ -100,7 +100,7 @@ int __init blz2060_esp_detect(struct scsi_host_template *tpnt)
unsigned long board = z->resource.start;
if (request_mem_region(board+BLZ2060_ESP_ADDR,
sizeof(struct ESP_regs), "NCR53C9x")) {
esp = esp_allocate(tpnt, (void *)board+BLZ2060_ESP_ADDR);
esp = esp_allocate(tpnt, (void *)board + BLZ2060_ESP_ADDR, 0);
/* Do command transfer with programmed I/O */
esp->do_pio_cmds = 1;

2
drivers/scsi/cyberstorm.c
View File

@ -126,7 +126,7 @@ int __init cyber_esp_detect(struct scsi_host_template *tpnt)
sizeof(struct ESP_regs));
return 0;
}
esp = esp_allocate(tpnt, (void *)board+CYBER_ESP_ADDR);
esp = esp_allocate(tpnt, (void *)board + CYBER_ESP_ADDR, 0);
/* Do command transfer with programmed I/O */
esp->do_pio_cmds = 1;

2
drivers/scsi/cyberstormII.c
View File

@ -98,7 +98,7 @@ int __init cyberII_esp_detect(struct scsi_host_template *tpnt)
address = (unsigned long)ZTWO_VADDR(board);
eregs = (struct ESP_regs *)(address + CYBERII_ESP_ADDR);
esp = esp_allocate(tpnt, (void *)board+CYBERII_ESP_ADDR);
esp = esp_allocate(tpnt, (void *)board + CYBERII_ESP_ADDR, 0);
esp_write(eregs->esp_cfg1, (ESP_CONFIG1_PENABLE | 7));
udelay(5);

361
drivers/scsi/dec_esp.c
View File

@ -18,7 +18,7 @@
* 20001005 - Initialization fixes for 2.4.0-test9
* Florian Lohoff <flo@rfc822.org>
*
* Copyright (C) 2002, 2003, 2005 Maciej W. Rozycki
* Copyright (C) 2002, 2003, 2005, 2006 Maciej W. Rozycki
*/
#include <linux/kernel.h>
@ -30,6 +30,7 @@
#include <linux/proc_fs.h>
#include <linux/spinlock.h>
#include <linux/stat.h>
#include <linux/tc.h>
#include <asm/dma.h>
#include <asm/irq.h>
@ -42,7 +43,6 @@
#include <asm/dec/ioasic_ints.h>
#include <asm/dec/machtype.h>
#include <asm/dec/system.h>
#include <asm/dec/tc.h>
#define DEC_SCSI_SREG 0
#define DEC_SCSI_DMAREG 0x40000
@ -98,51 +98,33 @@ static irqreturn_t scsi_dma_merr_int(int, void *);
static irqreturn_t scsi_dma_err_int(int, void *);
static irqreturn_t scsi_dma_int(int, void *);
static int dec_esp_detect(struct scsi_host_template * tpnt);
static int dec_esp_release(struct Scsi_Host *shost)
{
if (shost->irq)
free_irq(shost->irq, NULL);
if (shost->io_port && shost->n_io_port)
release_region(shost->io_port, shost->n_io_port);
scsi_unregister(shost);
return 0;
}
static struct scsi_host_template driver_template = {
.proc_name = "dec_esp",
.proc_info = esp_proc_info,
static struct scsi_host_template dec_esp_template = {
.module = THIS_MODULE,
.name = "NCR53C94",
.detect = dec_esp_detect,
.slave_alloc = esp_slave_alloc,
.slave_destroy = esp_slave_destroy,
.release = dec_esp_release,
.info = esp_info,
.queuecommand = esp_queue,
.eh_abort_handler = esp_abort,
.eh_bus_reset_handler = esp_reset,
.slave_alloc = esp_slave_alloc,
.slave_destroy = esp_slave_destroy,
.proc_info = esp_proc_info,
.proc_name = "dec_esp",
.can_queue = 7,
.this_id = 7,
.sg_tablesize = SG_ALL,
.cmd_per_lun = 1,
.use_clustering = DISABLE_CLUSTERING,
};
#include "scsi_module.c"
static struct NCR_ESP *dec_esp_platform;
/***************************************************************** Detection */
static int dec_esp_detect(struct scsi_host_template * tpnt)
static int dec_esp_platform_probe(void)
{
struct NCR_ESP *esp;
struct ConfigDev *esp_dev;
int slot;
unsigned long mem_start;
int err = 0;
if (IOASIC) {
esp_dev = 0;
esp = esp_allocate(tpnt, (void *) esp_dev);
esp = esp_allocate(&dec_esp_template, NULL, 1);
/* Do command transfer with programmed I/O */
esp->do_pio_cmds = 1;
@ -200,112 +182,175 @@ static int dec_esp_detect(struct scsi_host_template * tpnt)
/* Check for differential SCSI-bus */
esp->diff = 0;
err = request_irq(esp->irq, esp_intr, IRQF_DISABLED,
"ncr53c94", esp->ehost);
if (err)
goto err_alloc;
err = request_irq(dec_interrupt[DEC_IRQ_ASC_MERR],
scsi_dma_merr_int, IRQF_DISABLED,
"ncr53c94 error", esp->ehost);
if (err)
goto err_irq;
err = request_irq(dec_interrupt[DEC_IRQ_ASC_ERR],
scsi_dma_err_int, IRQF_DISABLED,
"ncr53c94 overrun", esp->ehost);
if (err)
goto err_irq_merr;
err = request_irq(dec_interrupt[DEC_IRQ_ASC_DMA], scsi_dma_int,
IRQF_DISABLED, "ncr53c94 dma", esp->ehost);
if (err)
goto err_irq_err;
esp_initialize(esp);
if (request_irq(esp->irq, esp_intr, IRQF_DISABLED,
"ncr53c94", esp->ehost))
goto err_dealloc;
if (request_irq(dec_interrupt[DEC_IRQ_ASC_MERR],
scsi_dma_merr_int, IRQF_DISABLED,
"ncr53c94 error", esp->ehost))
goto err_free_irq;
if (request_irq(dec_interrupt[DEC_IRQ_ASC_ERR],
scsi_dma_err_int, IRQF_DISABLED,
"ncr53c94 overrun", esp->ehost))
goto err_free_irq_merr;
if (request_irq(dec_interrupt[DEC_IRQ_ASC_DMA],
scsi_dma_int, IRQF_DISABLED,
"ncr53c94 dma", esp->ehost))
goto err_free_irq_err;
}
if (TURBOCHANNEL) {
while ((slot = search_tc_card("PMAZ-AA")) >= 0) {
claim_tc_card(slot);
esp_dev = 0;
esp = esp_allocate(tpnt, (void *) esp_dev);
mem_start = get_tc_base_addr(slot);
/* Store base addr into esp struct */
esp->slot = CPHYSADDR(mem_start);
esp->dregs = 0;
esp->eregs = (void *)CKSEG1ADDR(mem_start +
DEC_SCSI_SREG);
esp->do_pio_cmds = 1;
/* Set the command buffer */
esp->esp_command = (volatile unsigned char *) pmaz_cmd_buffer;
/* get virtual dma address for command buffer */
esp->esp_command_dvma = virt_to_phys(pmaz_cmd_buffer);
esp->cfreq = get_tc_speed();
esp->irq = get_tc_irq_nr(slot);
/* Required functions */
esp->dma_bytes_sent = &dma_bytes_sent;
esp->dma_can_transfer = &dma_can_transfer;
esp->dma_dump_state = &dma_dump_state;
esp->dma_init_read = &pmaz_dma_init_read;
esp->dma_init_write = &pmaz_dma_init_write;
esp->dma_ints_off = &pmaz_dma_ints_off;
esp->dma_ints_on = &pmaz_dma_ints_on;
esp->dma_irq_p = &dma_irq_p;
esp->dma_ports_p = &dma_ports_p;
esp->dma_setup = &pmaz_dma_setup;
/* Optional functions */
esp->dma_barrier = 0;
esp->dma_drain = &pmaz_dma_drain;
esp->dma_invalidate = 0;
esp->dma_irq_entry = 0;
esp->dma_irq_exit = 0;
esp->dma_poll = 0;
esp->dma_reset = 0;
esp->dma_led_off = 0;
esp->dma_led_on = 0;
esp->dma_mmu_get_scsi_one = pmaz_dma_mmu_get_scsi_one;
esp->dma_mmu_get_scsi_sgl = 0;
esp->dma_mmu_release_scsi_one = 0;
esp->dma_mmu_release_scsi_sgl = 0;
esp->dma_advance_sg = 0;
if (request_irq(esp->irq, esp_intr, IRQF_DISABLED,
"PMAZ_AA", esp->ehost)) {
esp_deallocate(esp);
release_tc_card(slot);
continue;
}
esp->scsi_id = 7;
esp->diff = 0;
esp_initialize(esp);
err = scsi_add_host(esp->ehost, NULL);
if (err) {
printk(KERN_ERR "ESP: Unable to register adapter\n");
goto err_irq_dma;
}
scsi_scan_host(esp->ehost);
dec_esp_platform = esp;
}
if(nesps) {
printk("ESP: Total of %d ESP hosts found, %d actually in use.\n", nesps, esps_in_use);
esps_running = esps_in_use;
return esps_in_use;
}
return 0;
err_free_irq_err:
free_irq(dec_interrupt[DEC_IRQ_ASC_ERR], scsi_dma_err_int);
err_free_irq_merr:
free_irq(dec_interrupt[DEC_IRQ_ASC_MERR], scsi_dma_merr_int);
err_free_irq:
free_irq(esp->irq, esp_intr);
err_dealloc:
err_irq_dma:
free_irq(dec_interrupt[DEC_IRQ_ASC_DMA], esp->ehost);
err_irq_err:
free_irq(dec_interrupt[DEC_IRQ_ASC_ERR], esp->ehost);
err_irq_merr:
free_irq(dec_interrupt[DEC_IRQ_ASC_MERR], esp->ehost);
err_irq:
free_irq(esp->irq, esp->ehost);
err_alloc:
esp_deallocate(esp);
return 0;
scsi_host_put(esp->ehost);
return err;
}
static int __init dec_esp_probe(struct device *dev)
{
struct NCR_ESP *esp;
resource_size_t start, len;
int err;
esp = esp_allocate(&dec_esp_template, NULL, 1);
dev_set_drvdata(dev, esp);
start = to_tc_dev(dev)->resource.start;
len = to_tc_dev(dev)->resource.end - start + 1;
if (!request_mem_region(start, len, dev->bus_id)) {
printk(KERN_ERR "%s: Unable to reserve MMIO resource\n",
dev->bus_id);
err = -EBUSY;
goto err_alloc;
}
/* Store base addr into esp struct. */
esp->slot = start;
esp->dregs = 0;
esp->eregs = (void *)CKSEG1ADDR(start + DEC_SCSI_SREG);
esp->do_pio_cmds = 1;
/* Set the command buffer. */
esp->esp_command = (volatile unsigned char *)pmaz_cmd_buffer;
/* Get virtual dma address for command buffer. */
esp->esp_command_dvma = virt_to_phys(pmaz_cmd_buffer);
esp->cfreq = tc_get_speed(to_tc_dev(dev)->bus);
esp->irq = to_tc_dev(dev)->interrupt;
/* Required functions. */
esp->dma_bytes_sent = &dma_bytes_sent;
esp->dma_can_transfer = &dma_can_transfer;
esp->dma_dump_state = &dma_dump_state;
esp->dma_init_read = &pmaz_dma_init_read;
esp->dma_init_write = &pmaz_dma_init_write;
esp->dma_ints_off = &pmaz_dma_ints_off;
esp->dma_ints_on = &pmaz_dma_ints_on;
esp->dma_irq_p = &dma_irq_p;
esp->dma_ports_p = &dma_ports_p;
esp->dma_setup = &pmaz_dma_setup;
/* Optional functions. */
esp->dma_barrier = 0;
esp->dma_drain = &pmaz_dma_drain;
esp->dma_invalidate = 0;
esp->dma_irq_entry = 0;
esp->dma_irq_exit = 0;
esp->dma_poll = 0;
esp->dma_reset = 0;
esp->dma_led_off = 0;
esp->dma_led_on = 0;
esp->dma_mmu_get_scsi_one = pmaz_dma_mmu_get_scsi_one;
esp->dma_mmu_get_scsi_sgl = 0;
esp->dma_mmu_release_scsi_one = 0;
esp->dma_mmu_release_scsi_sgl = 0;
esp->dma_advance_sg = 0;
err = request_irq(esp->irq, esp_intr, IRQF_DISABLED, "PMAZ_AA",
esp->ehost);
if (err) {
printk(KERN_ERR "%s: Unable to get IRQ %d\n",
dev->bus_id, esp->irq);
goto err_resource;
}
esp->scsi_id = 7;
esp->diff = 0;
esp_initialize(esp);
err = scsi_add_host(esp->ehost, dev);
if (err) {
printk(KERN_ERR "%s: Unable to register adapter\n",
dev->bus_id);
goto err_irq;
}
scsi_scan_host(esp->ehost);
return 0;
err_irq:
free_irq(esp->irq, esp->ehost);
err_resource:
release_mem_region(start, len);
err_alloc:
esp_deallocate(esp);
scsi_host_put(esp->ehost);
return err;
}
static void __exit dec_esp_platform_remove(void)
{
struct NCR_ESP *esp = dec_esp_platform;
free_irq(esp->irq, esp->ehost);
esp_deallocate(esp);
scsi_host_put(esp->ehost);
dec_esp_platform = NULL;
}
static void __exit dec_esp_remove(struct device *dev)
{
struct NCR_ESP *esp = dev_get_drvdata(dev);
free_irq(esp->irq, esp->ehost);
esp_deallocate(esp);
scsi_host_put(esp->ehost);
}
/************************************************************* DMA Functions */
static irqreturn_t scsi_dma_merr_int(int irq, void *dev_id)
{
@ -576,3 +621,67 @@ static void pmaz_dma_mmu_get_scsi_one(struct NCR_ESP *esp, struct scsi_cmnd * sp
{
sp->SCp.ptr = (char *)virt_to_phys(sp->request_buffer);
}
#ifdef CONFIG_TC
static int __init dec_esp_tc_probe(struct device *dev);
static int __exit dec_esp_tc_remove(struct device *dev);
static const struct tc_device_id dec_esp_tc_table[] = {
{ "DEC ", "PMAZ-AA " },
{ }
};
MODULE_DEVICE_TABLE(tc, dec_esp_tc_table);
static struct tc_driver dec_esp_tc_driver = {
.id_table = dec_esp_tc_table,
.driver = {
.name = "dec_esp",
.bus = &tc_bus_type,
.probe = dec_esp_tc_probe,
.remove = __exit_p(dec_esp_tc_remove),
},
};
static int __init dec_esp_tc_probe(struct device *dev)
{
int status = dec_esp_probe(dev);
if (!status)
get_device(dev);
return status;
}
static int __exit dec_esp_tc_remove(struct device *dev)
{
put_device(dev);
dec_esp_remove(dev);
return 0;
}
#endif
static int __init dec_esp_init(void)
{
int status;
status = tc_register_driver(&dec_esp_tc_driver);
if (!status)
dec_esp_platform_probe();
if (nesps) {
pr_info("ESP: Total of %d ESP hosts found, "
"%d actually in use.\n", nesps, esps_in_use);
esps_running = esps_in_use;
}
return status;
}
static void __exit dec_esp_exit(void)
{
dec_esp_platform_remove();
tc_unregister_driver(&dec_esp_tc_driver);
}
module_init(dec_esp_init);
module_exit(dec_esp_exit);

2
drivers/scsi/fastlane.c
View File

@ -142,7 +142,7 @@ int __init fastlane_esp_detect(struct scsi_host_template *tpnt)
if (board < 0x1000000) {
goto err_release;
}
esp = esp_allocate(tpnt, (void *)board+FASTLANE_ESP_ADDR);
esp = esp_allocate(tpnt, (void *)board + FASTLANE_ESP_ADDR, 0);
/* Do command transfer with programmed I/O */
esp->do_pio_cmds = 1;

2
drivers/scsi/jazz_esp.c
View File

@ -75,7 +75,7 @@ static int jazz_esp_detect(struct scsi_host_template *tpnt)
*/
if (1) {
esp_dev = NULL;
esp = esp_allocate(tpnt, (void *) esp_dev);
esp = esp_allocate(tpnt, esp_dev, 0);
/* Do command transfer with programmed I/O */
esp->do_pio_cmds = 1;

2
drivers/scsi/mac_esp.c
View File

@ -351,7 +351,7 @@ int mac_esp_detect(struct scsi_host_template * tpnt)
for (chipnum = 0; chipnum < chipspresent; chipnum ++) {
struct NCR_ESP * esp;
esp = esp_allocate(tpnt, (void *) NULL);
esp = esp_allocate(tpnt, NULL, 0);
esp->eregs = (struct ESP_regs *) get_base(chipnum);
esp->dma_irq_p = &esp_dafb_dma_irq_p;

2
drivers/scsi/mca_53c9x.c
View File

@ -122,7 +122,7 @@ static int mca_esp_detect(struct scsi_host_template *tpnt)
if ((slot = mca_find_adapter(*id_to_check, 0)) !=
MCA_NOTFOUND)
{
esp = esp_allocate(tpnt, (void *) NULL);
esp = esp_allocate(tpnt, NULL, 0);
pos[0] = mca_read_stored_pos(slot, 2);
pos[1] = mca_read_stored_pos(slot, 3);

2
drivers/scsi/oktagon_esp.c
View File

@ -133,7 +133,7 @@ int oktagon_esp_detect(struct scsi_host_template *tpnt)
eregs = (struct ESP_regs *)(address + OKTAGON_ESP_ADDR);
/* This line was 5 lines lower */
esp = esp_allocate(tpnt, (void *)board+OKTAGON_ESP_ADDR);
esp = esp_allocate(tpnt, (void *)board + OKTAGON_ESP_ADDR, 0);
/* we have to shift the registers only one bit for oktagon */
esp->shift = 1;

2
drivers/scsi/sun3x_esp.c
View File

@ -53,7 +53,7 @@ int sun3x_esp_detect(struct scsi_host_template *tpnt)
struct ConfigDev *esp_dev;
esp_dev = 0;
esp = esp_allocate(tpnt, (void *) esp_dev);
esp = esp_allocate(tpnt, esp_dev, 0);
/* Do command transfer with DMA */
esp->do_pio_cmds = 0;