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IB/hfi1: Fix serdes loopback set-up 

Change serdes mode setting to use MISC_CONFIG_BITS in
VERIFY_CAP_LOCAL_LINK_WIDTH register. This method of
setting up serdes loopback is universally compatible
across all firmware versions.

Reviewed-by: Jakub Byczkowski <jakub.byczkowski@intel.com>
Signed-off-by: Jan Sokolowski <jan.sokolowski@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Jan Sokolowski 2017-10-09 13:08:28 -07:00 committed by Doug Ledford
parent e19b205be4
commit 242b494bf2
2 changed files with 17 additions and 28 deletions
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42
drivers/infiniband/hw/hfi1/chip.c
View File

@ -9156,25 +9156,6 @@ static int do_quick_linkup(struct hfi1_devdata *dd)
return 0; /* success */
}
/*
* Set the SerDes to internal loopback mode.
* Returns 0 on success, -errno on error.
*/
static int set_serdes_loopback_mode(struct hfi1_devdata *dd)
{
int ret;
ret = set_physical_link_state(dd, PLS_INTERNAL_SERDES_LOOPBACK);
if (ret == HCMD_SUCCESS)
return 0;
dd_dev_err(dd,
"Set physical link state to SerDes Loopback failed with return %d\n",
ret);
if (ret >= 0)
ret = -EINVAL;
return ret;
}
/*
* Do all special steps to set up loopback.
*/
@ -9200,13 +9181,11 @@ static int init_loopback(struct hfi1_devdata *dd)
return 0;
}
/* handle serdes loopback */
if (loopback == LOOPBACK_SERDES) {
/* internal serdes loopack needs quick linkup on RTL */
if (dd->icode == ICODE_RTL_SILICON)
quick_linkup = 1;
return set_serdes_loopback_mode(dd);
}
/*
* SerDes loopback init sequence is handled in set_local_link_attributes
*/
if (loopback == LOOPBACK_SERDES)
return 0;
/* LCB loopback - handled at poll time */
if (loopback == LOOPBACK_LCB) {
@ -9265,7 +9244,7 @@ static int set_local_link_attributes(struct hfi1_pportdata *ppd)
u8 tx_polarity_inversion;
u8 rx_polarity_inversion;
int ret;
u32 misc_bits = 0;
/* reset our fabric serdes to clear any lingering problems */
fabric_serdes_reset(dd);
@ -9311,7 +9290,14 @@ static int set_local_link_attributes(struct hfi1_pportdata *ppd)
if (ret != HCMD_SUCCESS)
goto set_local_link_attributes_fail;
ret = write_vc_local_link_width(dd, 0, 0,
/*
* SerDes loopback init sequence requires
* setting bit 0 of MISC_CONFIG_BITS
*/
if (loopback == LOOPBACK_SERDES)
misc_bits |= 1 << LOOPBACK_SERDES_CONFIG_BIT_MASK_SHIFT;
ret = write_vc_local_link_width(dd, misc_bits, 0,
opa_to_vc_link_widths(
ppd->link_width_enabled));
if (ret != HCMD_SUCCESS)

3
drivers/infiniband/hw/hfi1/chip.h
View File

@ -582,6 +582,9 @@ enum {
#define LOOPBACK_LCB 2
#define LOOPBACK_CABLE 3 /* external cable */
/* set up serdes bit in MISC_CONFIG_BITS */
#define LOOPBACK_SERDES_CONFIG_BIT_MASK_SHIFT 0
/* read and write hardware registers */
u64 read_csr(const struct hfi1_devdata *dd, u32 offset);
void write_csr(const struct hfi1_devdata *dd, u32 offset, u64 value);