From a72cc3cefb5b3f25f419c1233b3b65779174a3e4 Mon Sep 17 00:00:00 2001 From: Mahesh Salgaonkar Date: Tue, 22 Aug 2017 08:09:49 +0530 Subject: opal: Extract sw checkstop fir address from HDAT. Extract sw checkstop fir address info from HDAT and populate device tree node ibm,sw-checkstop-fir. This patch is required for OPAL_CEC_REBOOT2 OPAL call to work as expected on p9. With this patch a device property 'ibm,sw-checkstop-fir' is now properly populated: # lsprop ibm,sw-checkstop-fir ibm,sw-checkstop-fir 05012000 0000001f Signed-off-by: Mahesh Salgaonkar Tested-by: Vasant Hegde Signed-off-by: Stewart Smith --- hdata/spira.c | 25 ++++++++++++++++++++++++- hdata/spira.h | 4 ++++ 2 files changed, 28 insertions(+), 1 deletion(-) (limited to 'hdata') diff --git a/hdata/spira.c b/hdata/spira.c index 59ea5cb..b58be7c 100644 --- a/hdata/spira.c +++ b/hdata/spira.c @@ -425,9 +425,10 @@ static bool add_xscom_sppcrd(uint64_t xscom_base) for_each_ntuple_idx(&spira.ntuples.proc_chip, hdif, i, SPPCRD_HDIF_SIG) { const struct sppcrd_chip_info *cinfo; + unsigned int csize; u32 ve, version; - cinfo = HDIF_get_idata(hdif, SPPCRD_IDATA_CHIP_INFO, NULL); + cinfo = HDIF_get_idata(hdif, SPPCRD_IDATA_CHIP_INFO, &csize); if (!CHECK_SPPTR(cinfo)) { prerror("XSCOM: Bad ChipID data %d\n", i); continue; @@ -487,6 +488,28 @@ static bool add_xscom_sppcrd(uint64_t xscom_base) parse_i2c_devs(hdif, SPPCRD_IDATA_HOST_I2C, np); add_vas_node(np, i); } + + /* + * Add sw checkstop scom address (ibm,sw-checkstop-fir) + * + * The latest HDAT versions have sw checkstop scom address + * info. But not sure from which version onwards (at least + * HDAT spec do not mention that explicitly). Hence use the + * sppcrd struct size returned by HDIF_get_idata to figure out + * whether it contains sw checkstop scom address info. Also + * check if sw_xstop_fir_scom address is non-zero. + */ + if ((csize >= (offsetof(struct sppcrd_chip_info, + sw_xstop_fir_bitpos) + 1)) && + cinfo->sw_xstop_fir_scom) { + __be32 fir_bit = cinfo->sw_xstop_fir_bitpos; + + if (!dt_find_property(dt_root, "ibm,sw-checkstop-fir")) + dt_add_property_cells(dt_root, + "ibm,sw-checkstop-fir", + be32_to_cpu(cinfo->sw_xstop_fir_scom), + be32_to_cpu(fir_bit)); + } } return i > 0; diff --git a/hdata/spira.h b/hdata/spira.h index 4867b6d..0276d4a 100644 --- a/hdata/spira.h +++ b/hdata/spira.h @@ -1035,6 +1035,10 @@ struct sppcrd_chip_info { __be32 capp1_func_state; /* *possibly* from Version 0x20 - check spec */ __be32 stop_levels; + /* From latest version (possibly 0x21 and later) */ + __be32 sw_xstop_fir_scom; + uint8_t sw_xstop_fir_bitpos; + uint8_t reserved_1[3]; } __packed; /* Idata index 1 : Chip TOD */ -- cgit v1.1