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author | Darrick J. Wong <djwong@us.ibm.com> | 2008-02-19 10:49:40 -0800 |
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committer | James Bottomley <James.Bottomley@HansenPartnership.com> | 2008-04-07 12:15:38 -0500 |
commit | 45e6cdf41437c72ed79cee64dc69e7f740511e50 (patch) | |
tree | 80814e8e3e58ddfe9e27e9674f256a67cdef0fb5 /drivers/scsi/libsas/sas_scsi_host.c | |
parent | 7e23ea488488400127a2da19c0d89f1723117504 (diff) | |
download | linux-stable-45e6cdf41437c72ed79cee64dc69e7f740511e50.tar.gz linux-stable-45e6cdf41437c72ed79cee64dc69e7f740511e50.tar.bz2 linux-stable-45e6cdf41437c72ed79cee64dc69e7f740511e50.zip |
[SCSI] libsas: Provide a transport-level facility to request SAS addrs
Provide a facility to use the request_firmware() interface to get a SAS
address from userspace. This can be used by SAS LLDDs that cannot
obtain the address from the host adapter.
Signed-off-by: Darrick J. Wong <djwong@us.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'drivers/scsi/libsas/sas_scsi_host.c')
-rw-r--r-- | drivers/scsi/libsas/sas_scsi_host.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/drivers/scsi/libsas/sas_scsi_host.c b/drivers/scsi/libsas/sas_scsi_host.c index 1f8241563c6c..601ec5b6a7f6 100644 --- a/drivers/scsi/libsas/sas_scsi_host.c +++ b/drivers/scsi/libsas/sas_scsi_host.c @@ -24,6 +24,8 @@ */ #include <linux/kthread.h> +#include <linux/firmware.h> +#include <linux/ctype.h> #include "sas_internal.h" @@ -1064,6 +1066,45 @@ void sas_target_destroy(struct scsi_target *starget) return; } +static void sas_parse_addr(u8 *sas_addr, const char *p) +{ + int i; + for (i = 0; i < SAS_ADDR_SIZE; i++) { + u8 h, l; + if (!*p) + break; + h = isdigit(*p) ? *p-'0' : toupper(*p)-'A'+10; + p++; + l = isdigit(*p) ? *p-'0' : toupper(*p)-'A'+10; + p++; + sas_addr[i] = (h<<4) | l; + } +} + +#define SAS_STRING_ADDR_SIZE 16 + +int sas_request_addr(struct Scsi_Host *shost, u8 *addr) +{ + int res; + const struct firmware *fw; + + res = request_firmware(&fw, "sas_addr", &shost->shost_gendev); + if (res) + return res; + + if (fw->size < SAS_STRING_ADDR_SIZE) { + res = -ENODEV; + goto out; + } + + sas_parse_addr(addr, fw->data); + +out: + release_firmware(fw); + return res; +} +EXPORT_SYMBOL_GPL(sas_request_addr); + EXPORT_SYMBOL_GPL(sas_queuecommand); EXPORT_SYMBOL_GPL(sas_target_alloc); EXPORT_SYMBOL_GPL(sas_slave_configure); |