Hi Jack, This is a customer requirement. Since the SAS addresses of all the phys were same , when the attached SAS addresses are different, it was forming only one domain. If we assign different SAS addresses, this will cause duplicate domain unless we set the strict_wide_port to 1.
Regards, Viswas G > -----Original Message----- > From: Jack Wang [mailto:xjtu...@gmail.com] > Sent: Tuesday, August 29, 2017 4:55 PM > To: Viswas G <viswa...@microsemi.com> > Cc: linux-scsi@vger.kernel.org; Vasanthalakshmi Tharmarajan > <vasanthalakshmi.t...@microsemi.com> > Subject: Re: [PATCH 3/6] pm80xx : Different SAS addresses for phys. > > EXTERNAL EMAIL > > > 2015-01-30 7:06 GMT+01:00 Viswas G <viswa...@microsemi.com>: > > Different SAS addresses are assigned for each set of phys. > > > > Signed-off-by: Viswas G <viswa...@microsemi.com> > > --- > > drivers/scsi/pm8001/pm8001_init.c | 13 +++++++++---- > > drivers/scsi/pm8001/pm80xx_hwi.c | 3 +-- > > 2 files changed, 10 insertions(+), 6 deletions(-) > > > > diff --git a/drivers/scsi/pm8001/pm8001_init.c > b/drivers/scsi/pm8001/pm8001_init.c > > index 034b2f7d1135..d282f1562615 100644 > > --- a/drivers/scsi/pm8001/pm8001_init.c > > +++ b/drivers/scsi/pm8001/pm8001_init.c > > @@ -132,7 +132,7 @@ static void pm8001_phy_init(struct > pm8001_hba_info *pm8001_ha, int phy_id) > > sas_phy->oob_mode = OOB_NOT_CONNECTED; > > sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN; > > sas_phy->id = phy_id; > > - sas_phy->sas_addr = &pm8001_ha->sas_addr[0]; > > + sas_phy->sas_addr = (u8 *)&phy->dev_sas_addr; > > sas_phy->frame_rcvd = &phy->frame_rcvd[0]; > > sas_phy->ha = (struct sas_ha_struct *)pm8001_ha->shost->hostdata; > > sas_phy->lldd_phy = phy; > > @@ -593,10 +593,12 @@ static void pm8001_post_sas_ha_init(struct > Scsi_Host *shost, > > for (i = 0; i < chip_info->n_phy; i++) { > > sha->sas_phy[i] = &pm8001_ha->phy[i].sas_phy; > > sha->sas_port[i] = &pm8001_ha->port[i].sas_port; > > + sha->sas_phy[i]->sas_addr = > > + (u8 *)&pm8001_ha->phy[i].dev_sas_addr; > > } > > sha->sas_ha_name = DRV_NAME; > > sha->dev = pm8001_ha->dev; > > - > > + sha->strict_wide_ports = 1; > > sha->lldd_module = THIS_MODULE; > > sha->sas_addr = &pm8001_ha->sas_addr[0]; > > sha->num_phys = chip_info->n_phy; > > @@ -613,6 +615,7 @@ static void pm8001_post_sas_ha_init(struct > Scsi_Host *shost, > > static void pm8001_init_sas_add(struct pm8001_hba_info *pm8001_ha) > > { > > u8 i, j; > > + u8 sas_add[8]; > > #ifdef PM8001_READ_VPD > > /* For new SPC controllers WWN is stored in flash vpd > > * For SPC/SPCve controllers WWN is stored in EEPROM > > @@ -674,10 +677,12 @@ static void pm8001_init_sas_add(struct > pm8001_hba_info *pm8001_ha) > > pm8001_ha->sas_addr[j] = > > payload.func_specific[0x804 + i]; > > } > > - > > + memcpy(sas_add, pm8001_ha->sas_addr, SAS_ADDR_SIZE); > > for (i = 0; i < pm8001_ha->chip->n_phy; i++) { > > + if (i && ((i % 4) == 0)) > > + sas_add[7] = sas_add[7] + 4; > > memcpy(&pm8001_ha->phy[i].dev_sas_addr, > > - pm8001_ha->sas_addr, SAS_ADDR_SIZE); > > + sas_add, SAS_ADDR_SIZE); > > PM8001_INIT_DBG(pm8001_ha, > > pm8001_printk("phy %d sas_addr = %016llx\n", i, > > pm8001_ha->phy[i].dev_sas_addr)); > > diff --git a/drivers/scsi/pm8001/pm80xx_hwi.c > b/drivers/scsi/pm8001/pm80xx_hwi.c > > index 8fb5ddf08cc4..a07b023c09bf 100644 > > --- a/drivers/scsi/pm8001/pm80xx_hwi.c > > +++ b/drivers/scsi/pm8001/pm80xx_hwi.c > > @@ -3041,7 +3041,6 @@ hw_event_phy_down(struct pm8001_hba_info > *pm8001_ha, void *piomb) > > port->port_state = portstate; > > phy->identify.device_type = 0; > > phy->phy_attached = 0; > > - memset(&phy->dev_sas_addr, 0, SAS_ADDR_SIZE); > > switch (portstate) { > > case PORT_VALID: > > break; > > @@ -4394,7 +4393,7 @@ pm80xx_chip_phy_start_req(struct > pm8001_hba_info *pm8001_ha, u8 phy_id) > > payload.sas_identify.dev_type = SAS_END_DEVICE; > > payload.sas_identify.initiator_bits = SAS_PROTOCOL_ALL; > > memcpy(payload.sas_identify.sas_addr, > > - pm8001_ha->sas_addr, SAS_ADDR_SIZE); > > + &pm8001_ha->phy[phy_id].dev_sas_addr, SAS_ADDR_SIZE); > > payload.sas_identify.phy_id = phy_id; > > ret = pm8001_mpi_build_cmd(pm8001_ha, circularQ, opcode, > &payload, 0); > > return ret; > > -- > > 2.12.3 > > > This removes the possibility to form a wide port, why do you want to do it?
