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| author | Oliver O'Halloran <oohall@gmail.com> | 2017-09-15 15:40:59 +1000 |
|---|---|---|
| committer | Stewart Smith <stewart@linux.vnet.ibm.com> | 2017-09-15 02:49:27 -0500 |
| commit | 1f242d5a503931146917fd7aeeb62a9525155fe0 (patch) | |
| tree | 70b0b25912260fae02c18f1b6cd4203a60722a89 /hdata/spira.c | |
| parent | 9b886a44d993ade2f05f3a554a098c674bb7cd7f (diff) | |
| download | skiboot-1f242d5a503931146917fd7aeeb62a9525155fe0.zip skiboot-1f242d5a503931146917fd7aeeb62a9525155fe0.tar.gz skiboot-1f242d5a503931146917fd7aeeb62a9525155fe0.tar.bz2 | |
hdata: Parse extra NVLink info
Add parsing for the link speed information and the OCC GPU presence
flags.
Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
Diffstat (limited to 'hdata/spira.c')
| -rw-r--r-- | hdata/spira.c | 30 |
1 files changed, 29 insertions, 1 deletions
diff --git a/hdata/spira.c b/hdata/spira.c index 73a678f..5e3d6cc 100644 --- a/hdata/spira.c +++ b/hdata/spira.c @@ -1288,9 +1288,10 @@ static void add_npu(struct dt_node *xscom, const struct HDIF_array_hdr *links, int group_target[6]; /* Tracks the PCI slot targeted each link group */ int group_count = 0; int link_count = 0; - uint32_t chip_id; + uint32_t size, chip_id; int i; + size = be32_to_cpu(links->esize); chip_id = dt_get_chip_id(xscom); memset(group_target, 0, sizeof(group_target)); @@ -1307,6 +1308,7 @@ static void add_npu(struct dt_node *xscom, const struct HDIF_array_hdr *links, HDIF_iarray_for_each(links, i, link) { uint16_t slot_id = be16_to_cpu(link->pci_slot_idx); uint32_t link_id = be32_to_cpu(link->link_id); + uint64_t speed = 0, nvlink_speed = 0; struct dt_node *node; /* only add a link node if this link is targeted at at device */ @@ -1403,6 +1405,32 @@ static void add_npu(struct dt_node *xscom, const struct HDIF_array_hdr *links, dt_add_property_cells(node, "ibm,pcie-slot", slot->phandle); } + + /* Newer fields which might not be populated */ + if (size <= 0x24) + continue; + + switch (be32_to_cpu(link->link_speed)) { + case 0: /* 20Gbps */ + speed = 20000000000ul; + nvlink_speed = 0x3; + break; + case 1: /* 25Gbps */ + speed = 25000000000ul; + nvlink_speed = 0x9; + break; + case 2: /* 25.78125 Gbps */ + nvlink_speed = 0x8; + speed = 25781250000ul; + break; + } + + /* ibm,link-speed is in bps and nvidia,link-speed is ~magic~ */ + dt_add_property_u64s(node, "ibm,link-speed", speed); + dt_add_property_cells(node, "nvidia,link-speed", nvlink_speed); + + dt_add_property_cells(node, DT_PRIVATE "occ-flag-pos", + PPC_BIT(link->occ_flag_bit)); } dt_add_property_cells(npu, "ibm,npu-links", link_count); |