diff options
| author | Dave Jiang <dave.jiang@intel.com> | 2012-01-04 01:32:44 -0800 |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2012-01-16 11:42:00 +0400 |
| commit | 594e566ae5985e0cc3185ac21509a86e90aad577 (patch) | |
| tree | f53db9f48084fea7c553077e60e03e7cd130c21a /drivers/scsi/isci/host.c | |
| parent | afd13a1f2b05157c7621d87dfe89ea6ea9061bd8 (diff) | |
[SCSI] isci: oem parameter format v1.1 (ssc select)
v1.1 allows finer grained tuning of the SSC (spread-spectrum-clocking)
settings for SAS and SATA. See notes in probe_roms.h
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/scsi/isci/host.c')
| -rw-r--r-- | drivers/scsi/isci/host.c | 47 |
1 files changed, 45 insertions, 2 deletions
diff --git a/drivers/scsi/isci/host.c b/drivers/scsi/isci/host.c index 383bb6913087..ed1441c89577 100644 --- a/drivers/scsi/isci/host.c +++ b/drivers/scsi/isci/host.c @@ -1759,7 +1759,7 @@ static enum sci_status sci_controller_construct(struct isci_host *ihost, return sci_controller_reset(ihost); } -int sci_oem_parameters_validate(struct sci_oem_params *oem) +int sci_oem_parameters_validate(struct sci_oem_params *oem, u8 version) { int i; @@ -1791,18 +1791,61 @@ int sci_oem_parameters_validate(struct sci_oem_params *oem) oem->controller.max_concurr_spin_up < 1) return -EINVAL; + if (oem->controller.do_enable_ssc) { + if (version < ISCI_ROM_VER_1_1 && oem->controller.do_enable_ssc != 1) + return -EINVAL; + + if (version >= ISCI_ROM_VER_1_1) { + u8 test = oem->controller.ssc_sata_tx_spread_level; + + switch (test) { + case 0: + case 2: + case 3: + case 6: + case 7: + break; + default: + return -EINVAL; + } + + test = oem->controller.ssc_sas_tx_spread_level; + if (oem->controller.ssc_sas_tx_type == 0) { + switch (test) { + case 0: + case 2: + case 3: + break; + default: + return -EINVAL; + } + } else if (oem->controller.ssc_sas_tx_type == 1) { + switch (test) { + case 0: + case 3: + case 6: + break; + default: + return -EINVAL; + } + } + } + } + return 0; } static enum sci_status sci_oem_parameters_set(struct isci_host *ihost) { u32 state = ihost->sm.current_state_id; + struct isci_pci_info *pci_info = to_pci_info(ihost->pdev); if (state == SCIC_RESET || state == SCIC_INITIALIZING || state == SCIC_INITIALIZED) { - if (sci_oem_parameters_validate(&ihost->oem_parameters)) + if (sci_oem_parameters_validate(&ihost->oem_parameters, + pci_info->orom->hdr.version)) return SCI_FAILURE_INVALID_PARAMETER_VALUE; return SCI_SUCCESS; |