diff options
| author | Sebastian Sanchez <sebastian.sanchez@intel.com> | 2018-05-02 06:42:21 -0700 |
|---|---|---|
| committer | Doug Ledford <dledford@redhat.com> | 2018-05-09 15:53:29 -0400 |
| commit | 254361c1890e67486cd957e9072e518b1c464e27 (patch) | |
| tree | ba7c54ff87a8ca46364064ce7ff24bff3bc81aa1 /drivers/infiniband/hw/hfi1/chip.h | |
| parent | f5e27a203f4cd7406bc7d3589d86aa318f68d276 (diff) | |
| download | linux-254361c1890e67486cd957e9072e518b1c464e27.tar.gz | |
IB/hfi1: Prevent LNI hang when LCB can't obtain lanes
When the LCB isn't able to get any lanes operational on the first transition into mission mode, the link transfer active never happens and the LNI stays in the polling state indefinitely. Reset LCB upon receiving an 8051 interrupt for LCB to try to obtain lanes with firmware version 1.25.0 or later. Also, update the LCB reset value in other parts of the code with a macro defined to make the code more maintainable and rename functions with the link_width label to link_mode to reflect the fact that those functions set and read link related data not just the link width. Reviewed-by: Michael J. Ruhl <michael.j.ruhl@intel.com> Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com> Signed-off-by: Sebastian Sanchez <sebastian.sanchez@intel.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'drivers/infiniband/hw/hfi1/chip.h')
| -rw-r--r-- | drivers/infiniband/hw/hfi1/chip.h | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/drivers/infiniband/hw/hfi1/chip.h b/drivers/infiniband/hw/hfi1/chip.h index c0d70f255050..fdf389e46e19 100644 --- a/drivers/infiniband/hw/hfi1/chip.h +++ b/drivers/infiniband/hw/hfi1/chip.h @@ -196,6 +196,15 @@ #define LSTATE_ARMED 0x3 #define LSTATE_ACTIVE 0x4 +/* DCC_CFG_RESET reset states */ +#define LCB_RX_FPE_TX_FPE_INTO_RESET (DCC_CFG_RESET_RESET_LCB | \ + DCC_CFG_RESET_RESET_TX_FPE | \ + DCC_CFG_RESET_RESET_RX_FPE | \ + DCC_CFG_RESET_ENABLE_CCLK_BCC) + /* 0x17 */ + +#define LCB_RX_FPE_TX_FPE_OUT_OF_RESET DCC_CFG_RESET_ENABLE_CCLK_BCC /* 0x10 */ + /* DC8051_STS_CUR_STATE port values (physical link states) */ #define PLS_DISABLED 0x30 #define PLS_OFFLINE 0x90 @@ -283,6 +292,7 @@ #define HREQ_SET_TX_EQ_ABS 0x04 #define HREQ_SET_TX_EQ_REL 0x05 #define HREQ_ENABLE 0x06 +#define HREQ_LCB_RESET 0x07 #define HREQ_CONFIG_DONE 0xfe #define HREQ_INTERFACE_TEST 0xff @@ -383,7 +393,7 @@ #define TX_SETTINGS 0x06 #define VERIFY_CAP_LOCAL_PHY 0x07 #define VERIFY_CAP_LOCAL_FABRIC 0x08 -#define VERIFY_CAP_LOCAL_LINK_WIDTH 0x09 +#define VERIFY_CAP_LOCAL_LINK_MODE 0x09 #define LOCAL_DEVICE_ID 0x0a #define RESERVED_REGISTERS 0x0b #define LOCAL_LNI_INFO 0x0c @@ -584,8 +594,9 @@ enum { #define LOOPBACK_LCB 2 #define LOOPBACK_CABLE 3 /* external cable */ -/* set up serdes bit in MISC_CONFIG_BITS */ +/* set up bits in MISC_CONFIG_BITS */ #define LOOPBACK_SERDES_CONFIG_BIT_MASK_SHIFT 0 +#define EXT_CFG_LCB_RESET_SUPPORTED_SHIFT 3 /* read and write hardware registers */ u64 read_csr(const struct hfi1_devdata *dd, u32 offset); |