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| author | Jeff Skirvin <jeffrey.d.skirvin@intel.com> | 2012-01-04 01:32:49 -0800 |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2012-01-16 11:43:04 +0400 |
| commit | 9fee607f0b29adabd72265a847b8e421dff10d66 (patch) | |
| tree | 7442c82b8e363a7aa1e87955e9619cf8e949cf3a /drivers/scsi/isci/init.c | |
| parent | 594e566ae5985e0cc3185ac21509a86e90aad577 (diff) | |
| download | linux-9fee607f0b29adabd72265a847b8e421dff10d66.tar.gz linux-9fee607f0b29adabd72265a847b8e421dff10d66.tar.bz2 linux-9fee607f0b29adabd72265a847b8e421dff10d66.zip | |
[SCSI] isci: oem parameter format v1.3 (cable select)
v1.3 allows the attenuation of the attached cables to be specified to
the driver in terms of 'short', 'medium', and 'long' (see probe_roms.h).
These settings (per phy) are retrieved from the platform oem-parameters
(BIOS rom) or via a module parameter override.
Reviewed-by: Jiangbi Liu <jiangbi.liu@intel.com>
Signed-off-by: Jeff Skirvin <jeffrey.d.skirvin@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/init.c')
| -rw-r--r-- | drivers/scsi/isci/init.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/scsi/isci/init.c b/drivers/scsi/isci/init.c index 8a34fd92e42e..1047108ba4de 100644 --- a/drivers/scsi/isci/init.c +++ b/drivers/scsi/isci/init.c @@ -122,6 +122,14 @@ unsigned char max_concurr_spinup; module_param(max_concurr_spinup, byte, 0); MODULE_PARM_DESC(max_concurr_spinup, "Max concurrent device spinup"); +uint cable_selection_override = CABLE_OVERRIDE_DISABLED; +module_param(cable_selection_override, uint, 0); + +MODULE_PARM_DESC(cable_selection_override, + "This field indicates length of the SAS/SATA cable between " + "host and device. If any bits > 15 are set (default) " + "indicates \"use platform defaults\""); + static ssize_t isci_show_id(struct device *dev, struct device_attribute *attr, char *buf) { struct Scsi_Host *shost = container_of(dev, typeof(*shost), shost_dev); @@ -412,6 +420,14 @@ static struct isci_host *isci_host_alloc(struct pci_dev *pdev, int id) return NULL; isci_host->shost = shost; + dev_info(&pdev->dev, "%sSCU controller %d: phy 3-0 cables: " + "{%s, %s, %s, %s}\n", + (is_cable_select_overridden() ? "* " : ""), isci_host->id, + lookup_cable_names(decode_cable_selection(isci_host, 3)), + lookup_cable_names(decode_cable_selection(isci_host, 2)), + lookup_cable_names(decode_cable_selection(isci_host, 1)), + lookup_cable_names(decode_cable_selection(isci_host, 0))); + err = isci_host_init(isci_host); if (err) goto err_shost; |