diff options
| -rw-r--r-- | drivers/scsi/scsi_transport_spi.c | 188 | ||||
| -rw-r--r-- | include/scsi/scsi_transport_spi.h | 6 |
2 files changed, 167 insertions, 27 deletions
diff --git a/drivers/scsi/scsi_transport_spi.c b/drivers/scsi/scsi_transport_spi.c index 28966d0..67c6cc4 100644 --- a/drivers/scsi/scsi_transport_spi.c +++ b/drivers/scsi/scsi_transport_spi.c @@ -35,7 +35,7 @@ #define SPI_PRINTK(x, l, f, a...) dev_printk(l, &(x)->dev, f , ##a) -#define SPI_NUM_ATTRS 10 /* increase this if you add attributes */ +#define SPI_NUM_ATTRS 13 /* increase this if you add attributes */ #define SPI_OTHER_ATTRS 1 /* Increase this if you add "always * on" attributes */ #define SPI_HOST_ATTRS 1 @@ -219,8 +219,11 @@ static int spi_setup_transport_attrs(struct device *dev) struct scsi_target *starget = to_scsi_target(dev); spi_period(starget) = -1; /* illegal value */ + spi_min_period(starget) = 0; spi_offset(starget) = 0; /* async */ + spi_max_offset(starget) = 255; spi_width(starget) = 0; /* narrow */ + spi_max_width(starget) = 1; spi_iu(starget) = 0; /* no IU */ spi_dt(starget) = 0; /* ST */ spi_qas(starget) = 0; @@ -235,6 +238,34 @@ static int spi_setup_transport_attrs(struct device *dev) return 0; } +#define spi_transport_show_simple(field, format_string) \ + \ +static ssize_t \ +show_spi_transport_##field(struct class_device *cdev, char *buf) \ +{ \ + struct scsi_target *starget = transport_class_to_starget(cdev); \ + struct spi_transport_attrs *tp; \ + \ + tp = (struct spi_transport_attrs *)&starget->starget_data; \ + return snprintf(buf, 20, format_string, tp->field); \ +} + +#define spi_transport_store_simple(field, format_string) \ + \ +static ssize_t \ +store_spi_transport_##field(struct class_device *cdev, const char *buf, \ + size_t count) \ +{ \ + int val; \ + struct scsi_target *starget = transport_class_to_starget(cdev); \ + struct spi_transport_attrs *tp; \ + \ + tp = (struct spi_transport_attrs *)&starget->starget_data; \ + val = simple_strtoul(buf, NULL, 0); \ + tp->field = val; \ + return count; \ +} + #define spi_transport_show_function(field, format_string) \ \ static ssize_t \ @@ -261,6 +292,25 @@ store_spi_transport_##field(struct class_device *cdev, const char *buf, \ struct spi_internal *i = to_spi_internal(shost->transportt); \ \ val = simple_strtoul(buf, NULL, 0); \ + i->f->set_##field(starget, val); \ + return count; \ +} + +#define spi_transport_store_max(field, format_string) \ +static ssize_t \ +store_spi_transport_##field(struct class_device *cdev, const char *buf, \ + size_t count) \ +{ \ + int val; \ + struct scsi_target *starget = transport_class_to_starget(cdev); \ + struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ + struct spi_internal *i = to_spi_internal(shost->transportt); \ + struct spi_transport_attrs *tp \ + = (struct spi_transport_attrs *)&starget->starget_data; \ + \ + val = simple_strtoul(buf, NULL, 0); \ + if (val > tp->max_##field) \ + val = tp->max_##field; \ i->f->set_##field(starget, val); \ return count; \ } @@ -272,9 +322,24 @@ static CLASS_DEVICE_ATTR(field, S_IRUGO | S_IWUSR, \ show_spi_transport_##field, \ store_spi_transport_##field); +#define spi_transport_simple_attr(field, format_string) \ + spi_transport_show_simple(field, format_string) \ + spi_transport_store_simple(field, format_string) \ +static CLASS_DEVICE_ATTR(field, S_IRUGO | S_IWUSR, \ + show_spi_transport_##field, \ + store_spi_transport_##field); + +#define spi_transport_max_attr(field, format_string) \ + spi_transport_show_function(field, format_string) \ + spi_transport_store_max(field, format_string) \ + spi_transport_simple_attr(max_##field, format_string) \ +static CLASS_DEVICE_ATTR(field, S_IRUGO | S_IWUSR, \ + show_spi_transport_##field, \ + store_spi_transport_##field); + /* The Parallel SCSI Tranport Attributes: */ -spi_transport_rd_attr(offset, "%d\n"); -spi_transport_rd_attr(width, "%d\n"); +spi_transport_max_attr(offset, "%d\n"); +spi_transport_max_attr(width, "%d\n"); spi_transport_rd_attr(iu, "%d\n"); spi_transport_rd_attr(dt, "%d\n"); spi_transport_rd_attr(qas, "%d\n"); @@ -300,26 +365,18 @@ static CLASS_DEVICE_ATTR(revalidate, S_IWUSR, NULL, store_spi_revalidate); /* Translate the period into ns according to the current spec * for SDTR/PPR messages */ -static ssize_t show_spi_transport_period(struct class_device *cdev, char *buf) - +static ssize_t +show_spi_transport_period_helper(struct class_device *cdev, char *buf, + int period) { - struct scsi_target *starget = transport_class_to_starget(cdev); - struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); - struct spi_transport_attrs *tp; int len, picosec; - struct spi_internal *i = to_spi_internal(shost->transportt); - - tp = (struct spi_transport_attrs *)&starget->starget_data; - - if (i->f->get_period) - i->f->get_period(starget); - if (tp->period < 0 || tp->period > 0xff) { + if (period < 0 || period > 0xff) { picosec = -1; - } else if (tp->period <= SPI_STATIC_PPR) { - picosec = ppr_to_ps[tp->period]; + } else if (period <= SPI_STATIC_PPR) { + picosec = ppr_to_ps[period]; } else { - picosec = tp->period * 4000; + picosec = period * 4000; } if (picosec == -1) { @@ -334,12 +391,9 @@ static ssize_t show_spi_transport_period(struct class_device *cdev, char *buf) } static ssize_t -store_spi_transport_period(struct class_device *cdev, const char *buf, - size_t count) +store_spi_transport_period_helper(struct class_device *cdev, const char *buf, + size_t count, int *periodp) { - struct scsi_target *starget = transport_class_to_starget(cdev); - struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); - struct spi_internal *i = to_spi_internal(shost->transportt); int j, picosec, period = -1; char *endp; @@ -368,15 +422,79 @@ store_spi_transport_period(struct class_device *cdev, const char *buf, if (period > 0xff) period = 0xff; - i->f->set_period(starget, period); + *periodp = period; return count; } +static ssize_t +show_spi_transport_period(struct class_device *cdev, char *buf) +{ + struct scsi_target *starget = transport_class_to_starget(cdev); + struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); + struct spi_internal *i = to_spi_internal(shost->transportt); + struct spi_transport_attrs *tp = + (struct spi_transport_attrs *)&starget->starget_data; + + if (i->f->get_period) + i->f->get_period(starget); + + return show_spi_transport_period_helper(cdev, buf, tp->period); +} + +static ssize_t +store_spi_transport_period(struct class_device *cdev, const char *buf, + size_t count) +{ + struct scsi_target *starget = transport_class_to_starget(cdev); + struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); + struct spi_internal *i = to_spi_internal(shost->transportt); + struct spi_transport_attrs *tp = + (struct spi_transport_attrs *)&starget->starget_data; + int period, retval; + + retval = store_spi_transport_period_helper(cdev, buf, count, &period); + + if (period < tp->min_period) + period = tp->min_period; + + i->f->set_period(starget, period); + + return retval; +} + static CLASS_DEVICE_ATTR(period, S_IRUGO | S_IWUSR, show_spi_transport_period, store_spi_transport_period); +static ssize_t +show_spi_transport_min_period(struct class_device *cdev, char *buf) +{ + struct scsi_target *starget = transport_class_to_starget(cdev); + struct spi_transport_attrs *tp = + (struct spi_transport_attrs *)&starget->starget_data; + + return show_spi_transport_period_helper(cdev, buf, tp->min_period); +} + +static ssize_t +store_spi_transport_min_period(struct class_device *cdev, const char *buf, + size_t count) +{ + struct scsi_target *starget = transport_class_to_starget(cdev); + struct spi_transport_attrs *tp = + (struct spi_transport_attrs *)&starget->starget_data; + + return store_spi_transport_period_helper(cdev, buf, count, + &tp->min_period); +} + + +static CLASS_DEVICE_ATTR(min_period, S_IRUGO | S_IWUSR, + show_spi_transport_min_period, + store_spi_transport_min_period); + + static ssize_t show_spi_host_signalling(struct class_device *cdev, char *buf) { struct Scsi_Host *shost = transport_class_to_shost(cdev); @@ -642,6 +760,7 @@ spi_dv_device_internal(struct scsi_request *sreq, u8 *buffer) { struct spi_internal *i = to_spi_internal(sreq->sr_host->transportt); struct scsi_device *sdev = sreq->sr_device; + struct scsi_target *starget = sdev->sdev_target; int len = sdev->inquiry_len; /* first set us up for narrow async */ DV_SET(offset, 0); @@ -655,9 +774,11 @@ spi_dv_device_internal(struct scsi_request *sreq, u8 *buffer) } /* test width */ - if (i->f->set_width && sdev->wdtr) { + if (i->f->set_width && spi_max_width(starget) && sdev->wdtr) { i->f->set_width(sdev->sdev_target, 1); + printk("WIDTH IS %d\n", spi_max_width(starget)); + if (spi_dv_device_compare_inquiry(sreq, buffer, buffer + len, DV_LOOPS) @@ -684,8 +805,8 @@ spi_dv_device_internal(struct scsi_request *sreq, u8 *buffer) retry: /* now set up to the maximum */ - DV_SET(offset, 255); - DV_SET(period, 1); + DV_SET(offset, spi_max_offset(starget)); + DV_SET(period, spi_min_period(starget)); if (len == 0) { SPI_PRINTK(sdev->sdev_target, KERN_INFO, "Domain Validation skipping write tests\n"); @@ -892,6 +1013,16 @@ EXPORT_SYMBOL(spi_display_xfer_agreement); if (i->f->show_##field) \ count++ +#define SETUP_RELATED_ATTRIBUTE(field, rel_field) \ + i->private_attrs[count] = class_device_attr_##field; \ + if (!i->f->set_##rel_field) { \ + i->private_attrs[count].attr.mode = S_IRUGO; \ + i->private_attrs[count].store = NULL; \ + } \ + i->attrs[count] = &i->private_attrs[count]; \ + if (i->f->show_##rel_field) \ + count++ + #define SETUP_HOST_ATTRIBUTE(field) \ i->private_host_attrs[count] = class_device_attr_##field; \ if (!i->f->set_##field) { \ @@ -975,8 +1106,11 @@ spi_attach_transport(struct spi_function_template *ft) i->f = ft; SETUP_ATTRIBUTE(period); + SETUP_RELATED_ATTRIBUTE(min_period, period); SETUP_ATTRIBUTE(offset); + SETUP_RELATED_ATTRIBUTE(max_offset, offset); SETUP_ATTRIBUTE(width); + SETUP_RELATED_ATTRIBUTE(max_width, width); SETUP_ATTRIBUTE(iu); SETUP_ATTRIBUTE(dt); SETUP_ATTRIBUTE(qas); diff --git a/include/scsi/scsi_transport_spi.h b/include/scsi/scsi_transport_spi.h index 6dcf497..a30d6cd 100644 --- a/include/scsi/scsi_transport_spi.h +++ b/include/scsi/scsi_transport_spi.h @@ -27,8 +27,11 @@ struct scsi_transport_template; struct spi_transport_attrs { int period; /* value in the PPR/SDTR command */ + int min_period; int offset; + int max_offset; unsigned int width:1; /* 0 - narrow, 1 - wide */ + unsigned int max_width:1; unsigned int iu:1; /* Information Units enabled */ unsigned int dt:1; /* DT clocking enabled */ unsigned int qas:1; /* Quick Arbitration and Selection enabled */ @@ -63,8 +66,11 @@ struct spi_host_attrs { /* accessor functions */ #define spi_period(x) (((struct spi_transport_attrs *)&(x)->starget_data)->period) +#define spi_min_period(x) (((struct spi_transport_attrs *)&(x)->starget_data)->min_period) #define spi_offset(x) (((struct spi_transport_attrs *)&(x)->starget_data)->offset) +#define spi_max_offset(x) (((struct spi_transport_attrs *)&(x)->starget_data)->max_offset) #define spi_width(x) (((struct spi_transport_attrs *)&(x)->starget_data)->width) +#define spi_max_width(x) (((struct spi_transport_attrs *)&(x)->starget_data)->max_width) #define spi_iu(x) (((struct spi_transport_attrs *)&(x)->starget_data)->iu) #define spi_dt(x) (((struct spi_transport_attrs *)&(x)->starget_data)->dt) #define spi_qas(x) (((struct spi_transport_attrs *)&(x)->starget_data)->qas) |
