forked from Minki/linux
[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>
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@ -24,6 +24,8 @@
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*/
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#include <linux/kthread.h>
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#include <linux/firmware.h>
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#include <linux/ctype.h>
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#include "sas_internal.h"
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@ -1064,6 +1066,45 @@ void sas_target_destroy(struct scsi_target *starget)
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return;
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}
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static void sas_parse_addr(u8 *sas_addr, const char *p)
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{
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int i;
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for (i = 0; i < SAS_ADDR_SIZE; i++) {
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u8 h, l;
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if (!*p)
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break;
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h = isdigit(*p) ? *p-'0' : toupper(*p)-'A'+10;
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p++;
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l = isdigit(*p) ? *p-'0' : toupper(*p)-'A'+10;
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p++;
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sas_addr[i] = (h<<4) | l;
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}
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}
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#define SAS_STRING_ADDR_SIZE 16
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int sas_request_addr(struct Scsi_Host *shost, u8 *addr)
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{
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int res;
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const struct firmware *fw;
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res = request_firmware(&fw, "sas_addr", &shost->shost_gendev);
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if (res)
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return res;
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if (fw->size < SAS_STRING_ADDR_SIZE) {
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res = -ENODEV;
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goto out;
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}
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sas_parse_addr(addr, fw->data);
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out:
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release_firmware(fw);
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return res;
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}
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EXPORT_SYMBOL_GPL(sas_request_addr);
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EXPORT_SYMBOL_GPL(sas_queuecommand);
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EXPORT_SYMBOL_GPL(sas_target_alloc);
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EXPORT_SYMBOL_GPL(sas_slave_configure);
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@ -677,4 +677,6 @@ extern void sas_ssp_task_response(struct device *dev, struct sas_task *task,
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struct ssp_response_iu *iu);
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struct sas_phy *sas_find_local_phy(struct domain_device *dev);
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int sas_request_addr(struct Scsi_Host *shost, u8 *addr);
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#endif /* _SASLIB_H_ */
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