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imsm platform: support for Intel(R) SAS controller. 

This patch adds platform support for SAS controller(s) built in Intel(R) Patsburg
chipset.

Signed-off-by: Marcin Labun <marcin.labun@intel.com>
Signed-off-by: Artur Wojcik <artur.wojcik@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
Labun Marcin 2011-01-25 17:44:11 +11:00 committed by NeilBrown
parent 10ce18083d
commit a8e5382a54
2 changed files with 60 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

63
platform-intel.c
View File

@ -51,6 +51,14 @@ struct sys_dev *find_driver_devices(const char *bus, const char *driver)
struct dirent *de;
struct sys_dev *head = NULL;
struct sys_dev *list = NULL;
enum sys_dev_type type;
if (strcmp(driver, "isci") == 0)
type = SYS_DEV_SAS;
else if (strcmp(driver, "ahci") == 0)
type = SYS_DEV_SATA;
else
type = SYS_DEV_UNKNOWN;
sprintf(path, "/sys/bus/%s/drivers/%s", bus, driver);
driver_dir = opendir(path);
@ -74,6 +82,13 @@ struct sys_dev *find_driver_devices(const char *bus, const char *driver)
if (strncmp(bus, c+1, strlen(bus)) != 0)
continue;
sprintf(path, "/sys/bus/%s/drivers/%s/%s",
bus, driver, de->d_name);
/* if it's not Intel device skip it. */
if (devpath_to_vendor(path) != 0x8086)
continue;
/* start / add list entry */
if (!head) {
head = malloc(sizeof(*head));
@ -88,11 +103,11 @@ struct sys_dev *find_driver_devices(const char *bus, const char *driver)
break;
}
/* generate canonical path name for the device */
sprintf(path, "/sys/bus/%s/drivers/%s/%s",
bus, driver, de->d_name);
list->type = type;
list->path = canonicalize_file_name(path);
list->next = NULL;
if ((list->pci_id = strrchr(list->path, '/')) != NULL)
list->pci_id++;
}
closedir(driver_dir);
return head;
@ -122,23 +137,34 @@ __u16 devpath_to_vendor(const char *dev_path)
return id;
}
static int platform_has_intel_ahci(void)
struct sys_dev *find_intel_devices(void)
{
struct sys_dev *devices = find_driver_devices("pci", "ahci");
struct sys_dev *dev;
int ret = 0;
struct sys_dev *ahci, *isci;
for (dev = devices; dev; dev = dev->next)
if (devpath_to_vendor(dev->path) == 0x8086) {
ret = 1;
break;
}
isci = find_driver_devices("pci", "isci");
ahci = find_driver_devices("pci", "ahci");
free_sys_dev(&devices);
return ret;
if (!ahci) {
ahci = isci;
} else {
struct sys_dev *elem = ahci;
while (elem->next)
elem = elem->next;
elem->next = isci;
}
return ahci;
}
static int platform_has_intel_devices(void)
{
struct sys_dev *devices;
devices = find_intel_devices();
if (devices) {
free_sys_dev(&devices);
return 1;
}
return 0;
}
static struct imsm_orom imsm_orom;
static int scan(const void *start, const void *end)
@ -185,7 +211,7 @@ const struct imsm_orom *find_imsm_orom(void)
return &imsm_orom;
}
if (!platform_has_intel_ahci())
if (!platform_has_intel_devices())
return NULL;
/* scan option-rom memory looking for an imsm signature */
@ -212,7 +238,7 @@ char *devt_to_devpath(dev_t dev)
return canonicalize_file_name(device);
}
static char *diskfd_to_devpath(int fd)
char *diskfd_to_devpath(int fd)
{
/* return the device path for a disk, return NULL on error or fd
* refers to a partition
@ -233,7 +259,7 @@ int path_attached_to_hba(const char *disk_path, const char *hba_path)
if (!disk_path || !hba_path)
return 0;
dprintf("hba: %s - disk: %s\n", hba_path, disk_path);
if (strncmp(disk_path, hba_path, strlen(hba_path)) == 0)
rc = 1;
else
@ -263,4 +289,3 @@ int disk_attached_to_hba(int fd, const char *hba_path)
return rc;
}

16
platform-intel.h
View File

@ -115,6 +115,7 @@ static inline int imsm_orom_has_chunk(const struct imsm_orom *orom, int chunk)
return !!(orom->sss & (1 << (fs - 1)));
}
/**
* fls - find last (most-significant) bit set
* @x: the word to search
@ -164,15 +165,30 @@ static inline int imsm_orom_default_chunk(const struct imsm_orom *orom)
return min(512, (1 << fs));
}
enum sys_dev_type {
SYS_DEV_UNKNOWN = 0,
SYS_DEV_SAS,
SYS_DEV_SATA,
SYS_DEV_MAX
};
struct sys_dev {
enum sys_dev_type type;
char *path;
char *pci_id;
struct sys_dev *next;
};
char *diskfd_to_devpath(int fd);
struct sys_dev *find_driver_devices(const char *bus, const char *driver);
struct sys_dev *find_intel_devices(void);
__u16 devpath_to_vendor(const char *dev_path);
void free_sys_dev(struct sys_dev **list);
const struct imsm_orom *find_imsm_orom(void);
int disk_attached_to_hba(int fd, const char *hba_path);
char *devt_to_devpath(dev_t dev);
int path_attached_to_hba(const char *disk_path, const char *hba_path);
const char *get_sys_dev_type(enum sys_dev_type);