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[SCSI] scsi_transport_sas: make minimum and maximum linkrate settable quantities

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According to SPEC, the minimum_linkrate and maximum_linkrate should be
settable by the user.  This patch introduces a callback that allows the
sas class to pass these settings on to the driver.

Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
James Bottomley 2006-09-06 19:25:22 -05:00 committed by James Bottomley
parent 88edf74610
commit d24e1eeb3a
2 changed files with 73 additions and 6 deletions
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71
drivers/scsi/scsi_transport_sas.c
View File

@ -77,6 +77,24 @@ get_sas_##title##_names(u32 table_key, char *buf) \
return len; \
}
#define sas_bitfield_name_set(title, table) \
static ssize_t \
set_sas_##title##_names(u32 *table_key, const char *buf) \
{ \
ssize_t len = 0; \
int i; \
\
for (i = 0; i < ARRAY_SIZE(table); i++) { \
len = strlen(table[i].name); \
if (strncmp(buf, table[i].name, len) == 0 && \
(buf[len] == '\n' || buf[len] == '\0')) { \
*table_key = table[i].value; \
return 0; \
} \
} \
return -EINVAL; \
}
#define sas_bitfield_name_search(title, table) \
static ssize_t \
get_sas_##title##_names(u32 table_key, char *buf) \
@ -131,7 +149,7 @@ static struct {
{ SAS_LINK_RATE_6_0_GBPS, "6.0 Gbit" },
};
sas_bitfield_name_search(linkspeed, sas_linkspeed_names)
sas_bitfield_name_set(linkspeed, sas_linkspeed_names)
/*
* SAS host attributes
@ -253,10 +271,39 @@ show_sas_phy_##field(struct class_device *cdev, char *buf) \
return get_sas_linkspeed_names(phy->field, buf); \
}
/* Fudge to tell if we're minimum or maximum */
#define sas_phy_store_linkspeed(field) \
static ssize_t \
store_sas_phy_##field(struct class_device *cdev, const char *buf, \
size_t count) \
{ \
struct sas_phy *phy = transport_class_to_phy(cdev); \
struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); \
struct sas_internal *i = to_sas_internal(shost->transportt); \
u32 value; \
struct sas_phy_linkrates rates = {0}; \
int error; \
\
error = set_sas_linkspeed_names(&value, buf); \
if (error) \
return error; \
rates.field = value; \
error = i->f->set_phy_speed(phy, &rates); \
\
return error ? error : count; \
}
#define sas_phy_linkspeed_rw_attr(field) \
sas_phy_show_linkspeed(field) \
sas_phy_store_linkspeed(field) \
static CLASS_DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, \
store_sas_phy_##field)
#define sas_phy_linkspeed_attr(field) \
sas_phy_show_linkspeed(field) \
static CLASS_DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
#define sas_phy_show_linkerror(field) \
static ssize_t \
show_sas_phy_##field(struct class_device *cdev, char *buf) \
@ -326,9 +373,9 @@ sas_phy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
//sas_phy_simple_attr(port_identifier, port_identifier, "%d\n", int);
sas_phy_linkspeed_attr(negotiated_linkrate);
sas_phy_linkspeed_attr(minimum_linkrate_hw);
sas_phy_linkspeed_attr(minimum_linkrate);
sas_phy_linkspeed_rw_attr(minimum_linkrate);
sas_phy_linkspeed_attr(maximum_linkrate_hw);
sas_phy_linkspeed_attr(maximum_linkrate);
sas_phy_linkspeed_rw_attr(maximum_linkrate);
sas_phy_linkerror_attr(invalid_dword_count);
sas_phy_linkerror_attr(running_disparity_error_count);
sas_phy_linkerror_attr(loss_of_dword_sync_count);
@ -1317,6 +1364,16 @@ static int sas_user_scan(struct Scsi_Host *shost, uint channel,
if (test) \
count++
#define SETUP_TEMPLATE_RW(attrb, field, perm, test, ro_test, ro_perm) \
i->private_##attrb[count] = class_device_attr_##field; \
i->private_##attrb[count].attr.mode = perm; \
if (ro_test) { \
i->private_##attrb[count].attr.mode = ro_perm; \
i->private_##attrb[count].store = NULL; \
} \
i->attrb[count] = &i->private_##attrb[count]; \
if (test) \
count++
#define SETUP_RPORT_ATTRIBUTE(field) \
SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, 1)
@ -1327,6 +1384,10 @@ static int sas_user_scan(struct Scsi_Host *shost, uint channel,
#define SETUP_PHY_ATTRIBUTE(field) \
SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, 1)
#define SETUP_PHY_ATTRIBUTE_RW(field) \
SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1, \
!i->f->set_phy_speed, S_IRUGO)
#define SETUP_PORT_ATTRIBUTE(field) \
SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1)
@ -1407,9 +1468,9 @@ sas_attach_transport(struct sas_function_template *ft)
//SETUP_PHY_ATTRIBUTE(port_identifier);
SETUP_PHY_ATTRIBUTE(negotiated_linkrate);
SETUP_PHY_ATTRIBUTE(minimum_linkrate_hw);
SETUP_PHY_ATTRIBUTE(minimum_linkrate);
SETUP_PHY_ATTRIBUTE_RW(minimum_linkrate);
SETUP_PHY_ATTRIBUTE(maximum_linkrate_hw);
SETUP_PHY_ATTRIBUTE(maximum_linkrate);
SETUP_PHY_ATTRIBUTE_RW(maximum_linkrate);
SETUP_PHY_ATTRIBUTE(invalid_dword_count);
SETUP_PHY_ATTRIBUTE(running_disparity_error_count);

6
include/scsi/scsi_transport_sas.h
View File

@ -150,12 +150,18 @@ struct sas_port {
#define transport_class_to_sas_port(cdev) \
dev_to_sas_port((cdev)->dev)
struct sas_phy_linkrates {
enum sas_linkrate maximum_linkrate;
enum sas_linkrate minimum_linkrate;
};
/* The functions by which the transport class and the driver communicate */
struct sas_function_template {
int (*get_linkerrors)(struct sas_phy *);
int (*get_enclosure_identifier)(struct sas_rphy *, u64 *);
int (*get_bay_identifier)(struct sas_rphy *);
int (*phy_reset)(struct sas_phy *, int);
int (*set_phy_speed)(struct sas_phy *, struct sas_phy_linkrates *);
};