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scsi: pm80xx: Do not request 12G sas speeds

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Occasionally, 6G capable drives fail to train at 6G on links that look good
from a signal-integrity perspective. PMC suggests configuring the port to
not even expect 12G.

Link: https://lore.kernel.org/r/20191114100910.6153-11-deepak.ukey@microchip.com
Acked-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Signed-off-by: peter chang <dpf@google.com>
Signed-off-by: Deepak Ukey <deepak.ukey@microchip.com>
Signed-off-by: Viswas G <Viswas.G@microchip.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
peter chang 2019-11-14 15:39:07 +05:30 committed by Martin K. Petersen
parent 51c1c5f6ed
commit 3e253d9657
3 changed files with 22 additions and 17 deletions
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17
drivers/scsi/pm8001/pm8001_init.c
View file

@ -41,11 +41,20 @@
#include <linux/slab.h>
#include "pm8001_sas.h"
#include "pm8001_chips.h"
#include "pm80xx_hwi.h"
static ulong logging_level = PM8001_FAIL_LOGGING | PM8001_IOERR_LOGGING;
module_param(logging_level, ulong, 0644);
MODULE_PARM_DESC(logging_level, " bits for enabling logging info.");
static ulong link_rate = LINKRATE_15 | LINKRATE_30 | LINKRATE_60 | LINKRATE_120;
module_param(link_rate, ulong, 0644);
MODULE_PARM_DESC(link_rate, "Enable link rate.\n"
" 1: Link rate 1.5G\n"
" 2: Link rate 3.0G\n"
" 4: Link rate 6.0G\n"
" 8: Link rate 12.0G\n");
static struct scsi_transport_template *pm8001_stt;
/**
@ -471,6 +480,14 @@ static struct pm8001_hba_info *pm8001_pci_alloc(struct pci_dev *pdev,
pm8001_ha->shost = shost;
pm8001_ha->id = pm8001_id++;
pm8001_ha->logging_level = logging_level;
if (link_rate >= 1 && link_rate <= 15)
pm8001_ha->link_rate = (link_rate << 8);
else {
pm8001_ha->link_rate = LINKRATE_15 | LINKRATE_30 |
LINKRATE_60 | LINKRATE_120;
PM8001_FAIL_DBG(pm8001_ha, pm8001_printk(
"Setting link rate to default value\n"));
}
sprintf(pm8001_ha->name, "%s%d", DRV_NAME, pm8001_ha->id);
/* IOMB size is 128 for 8088/89 controllers */
if (pm8001_ha->chip_id != chip_8001)

1
drivers/scsi/pm8001/pm8001_sas.h
View file

@ -546,6 +546,7 @@ struct pm8001_hba_info {
struct tasklet_struct tasklet[PM8001_MAX_MSIX_VEC];
#endif
u32 logging_level;
u32 link_rate;
u32 fw_status;
u32 smp_exp_mode;
bool controller_fatal_error;

21
drivers/scsi/pm8001/pm80xx_hwi.c
View file

@ -37,6 +37,7 @@
* POSSIBILITY OF SUCH DAMAGES.
*
*/
#include <linux/version.h>
#include <linux/slab.h>
#include "pm8001_sas.h"
#include "pm80xx_hwi.h"
@ -4565,23 +4566,9 @@ pm80xx_chip_phy_start_req(struct pm8001_hba_info *pm8001_ha, u8 phy_id)
PM8001_INIT_DBG(pm8001_ha,
pm8001_printk("PHY START REQ for phy_id %d\n", phy_id));
/*
** [0:7] PHY Identifier
** [8:11] link rate 1.5G, 3G, 6G
** [12:13] link mode 01b SAS mode; 10b SATA mode; 11b Auto mode
** [14] 0b disable spin up hold; 1b enable spin up hold
** [15] ob no change in current PHY analig setup 1b enable using SPAST
*/
if (!IS_SPCV_12G(pm8001_ha->pdev))
payload.ase_sh_lm_slr_phyid = cpu_to_le32(SPINHOLD_DISABLE |
LINKMODE_AUTO | LINKRATE_15 |
LINKRATE_30 | LINKRATE_60 | phy_id);
else
payload.ase_sh_lm_slr_phyid = cpu_to_le32(SPINHOLD_DISABLE |
LINKMODE_AUTO | LINKRATE_15 |
LINKRATE_30 | LINKRATE_60 | LINKRATE_120 |
phy_id);
payload.ase_sh_lm_slr_phyid = cpu_to_le32(SPINHOLD_DISABLE |
LINKMODE_AUTO | pm8001_ha->link_rate | phy_id);
/* SSC Disable and SAS Analog ST configuration */
/**
payload.ase_sh_lm_slr_phyid =
@ -4594,7 +4581,7 @@ 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->phy[phy_id].dev_sas_addr, SAS_ADDR_SIZE);
&pm8001_ha->sas_addr, SAS_ADDR_SIZE);
payload.sas_identify.phy_id = phy_id;
ret = pm8001_mpi_build_cmd(pm8001_ha, circularQ, opcode, &payload,
sizeof(payload), 0);