From: Darrick J. Wong Date: Tue, 19 Feb 2008 18:49:40 +0000 (-0800) Subject: [SCSI] libsas: Provide a transport-level facility to request SAS addrs X-Git-Tag: v2.6.26-rc1~1140^2~133 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=45e6cdf41437c72ed79cee64dc69e7f740511e50;p=linux-2.6 [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 Signed-off-by: James Bottomley --- diff --git a/drivers/scsi/libsas/sas_scsi_host.c b/drivers/scsi/libsas/sas_scsi_host.c index 1f8241563c..601ec5b6a7 100644 --- a/drivers/scsi/libsas/sas_scsi_host.c +++ b/drivers/scsi/libsas/sas_scsi_host.c @@ -24,6 +24,8 @@ */ #include +#include +#include #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); diff --git a/include/scsi/libsas.h b/include/scsi/libsas.h index 39e1cac24b..98724ba65a 100644 --- a/include/scsi/libsas.h +++ b/include/scsi/libsas.h @@ -677,4 +677,6 @@ extern void sas_ssp_task_response(struct device *dev, struct sas_task *task, struct ssp_response_iu *iu); struct sas_phy *sas_find_local_phy(struct domain_device *dev); +int sas_request_addr(struct Scsi_Host *shost, u8 *addr); + #endif /* _SASLIB_H_ */