From: Carl Heymann Date: Mon, 4 Dec 2017 22:34:20 +0000 (+0100) Subject: nfp: dump CPP, XPB and direct ME CSRs X-Git-Tag: v4.16-rc1~123^2~417^2~1 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=0e6c4955e149dc4733e0265a99c3040bf4f4a164;p=linux.git nfp: dump CPP, XPB and direct ME CSRs - The spec defines CSR address ranges for these types. - Dump each TLV chunk in the spec as a chunk that includes the spec and the data over the defined address range. Signed-off-by: Carl Heymann Reviewed-by: Jakub Kicinski Signed-off-by: Simon Horman Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_debugdump.c b/drivers/net/ethernet/netronome/nfp/nfp_net_debugdump.c index 1e57dab60abf..b23e2e0570af 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_net_debugdump.c +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_debugdump.c @@ -43,6 +43,9 @@ #define ALIGN8(x) ALIGN(x, 8) enum nfp_dumpspec_type { + NFP_DUMPSPEC_TYPE_CPP_CSR = 0, + NFP_DUMPSPEC_TYPE_XPB_CSR = 1, + NFP_DUMPSPEC_TYPE_ME_CSR = 2, NFP_DUMPSPEC_TYPE_RTSYM = 4, NFP_DUMPSPEC_TYPE_HWINFO = 5, NFP_DUMPSPEC_TYPE_FWNAME = 6, @@ -77,11 +80,27 @@ struct nfp_dump_common_cpp { __be32 dump_length; /* total bytes to dump, aligned to reg size */ }; +/* CSR dumpables */ +struct nfp_dumpspec_csr { + struct nfp_dump_tl tl; + struct nfp_dump_common_cpp cpp; + __be32 register_width; /* in bits */ +}; + struct nfp_dumpspec_rtsym { struct nfp_dump_tl tl; char rtsym[0]; }; +/* header for register dumpable */ +struct nfp_dump_csr { + struct nfp_dump_tl tl; + struct nfp_dump_common_cpp cpp; + __be32 register_width; /* in bits */ + __be32 error; /* error code encountered while reading */ + __be32 error_offset; /* offset being read when error occurred */ +}; + struct nfp_dump_rtsym { struct nfp_dump_tl tl; struct nfp_dump_common_cpp cpp; @@ -223,6 +242,20 @@ static int nfp_calc_hwinfo_field_sz(struct nfp_pf *pf, struct nfp_dump_tl *spec) return sizeof(struct nfp_dump_tl) + ALIGN8(key_len + strlen(value) + 2); } +static bool nfp_csr_spec_valid(struct nfp_dumpspec_csr *spec_csr) +{ + u32 required_read_sz = sizeof(*spec_csr) - sizeof(spec_csr->tl); + u32 available_sz = be32_to_cpu(spec_csr->tl.length); + u32 reg_width; + + if (available_sz < required_read_sz) + return false; + + reg_width = be32_to_cpu(spec_csr->register_width); + + return reg_width == 32 || reg_width == 64; +} + static int nfp_calc_rtsym_dump_sz(struct nfp_pf *pf, struct nfp_dump_tl *spec) { @@ -248,6 +281,7 @@ nfp_calc_rtsym_dump_sz(struct nfp_pf *pf, struct nfp_dump_tl *spec) static int nfp_add_tlv_size(struct nfp_pf *pf, struct nfp_dump_tl *tl, void *param) { + struct nfp_dumpspec_csr *spec_csr; u32 *size = param; u32 hwinfo_size; @@ -255,6 +289,16 @@ nfp_add_tlv_size(struct nfp_pf *pf, struct nfp_dump_tl *tl, void *param) case NFP_DUMPSPEC_TYPE_FWNAME: *size += nfp_calc_fwname_tlv_size(pf); break; + case NFP_DUMPSPEC_TYPE_CPP_CSR: + case NFP_DUMPSPEC_TYPE_XPB_CSR: + case NFP_DUMPSPEC_TYPE_ME_CSR: + spec_csr = (struct nfp_dumpspec_csr *)tl; + if (!nfp_csr_spec_valid(spec_csr)) + *size += nfp_dump_error_tlv_size(tl); + else + *size += ALIGN8(sizeof(struct nfp_dump_csr)) + + ALIGN8(be32_to_cpu(spec_csr->cpp.dump_length)); + break; case NFP_DUMPSPEC_TYPE_RTSYM: *size += nfp_calc_rtsym_dump_sz(pf, tl); break; @@ -417,6 +461,55 @@ static int nfp_dump_hwinfo_field(struct nfp_pf *pf, struct nfp_dump_tl *spec, return 0; } +static int +nfp_dump_csr_range(struct nfp_pf *pf, struct nfp_dumpspec_csr *spec_csr, + struct nfp_dump_state *dump) +{ + struct nfp_dump_csr *dump_header = dump->p; + u32 reg_sz, header_size, total_size; + u32 cpp_rd_addr, max_rd_addr; + int bytes_read; + void *dest; + u32 cpp_id; + int err; + + if (!nfp_csr_spec_valid(spec_csr)) + return nfp_dump_error_tlv(&spec_csr->tl, -EINVAL, dump); + + reg_sz = be32_to_cpu(spec_csr->register_width) / BITS_PER_BYTE; + header_size = ALIGN8(sizeof(*dump_header)); + total_size = header_size + + ALIGN8(be32_to_cpu(spec_csr->cpp.dump_length)); + dest = dump->p + header_size; + + err = nfp_add_tlv(be32_to_cpu(spec_csr->tl.type), total_size, dump); + if (err) + return err; + + dump_header->cpp = spec_csr->cpp; + dump_header->register_width = spec_csr->register_width; + + cpp_id = nfp_get_numeric_cpp_id(&spec_csr->cpp.cpp_id); + cpp_rd_addr = be32_to_cpu(spec_csr->cpp.offset); + max_rd_addr = cpp_rd_addr + be32_to_cpu(spec_csr->cpp.dump_length); + + while (cpp_rd_addr < max_rd_addr) { + bytes_read = nfp_cpp_read(pf->cpp, cpp_id, cpp_rd_addr, dest, + reg_sz); + if (bytes_read != reg_sz) { + if (bytes_read >= 0) + bytes_read = -EIO; + dump_header->error = cpu_to_be32(bytes_read); + dump_header->error_offset = cpu_to_be32(cpp_rd_addr); + break; + } + cpp_rd_addr += reg_sz; + dest += reg_sz; + } + + return 0; +} + static int nfp_dump_single_rtsym(struct nfp_pf *pf, struct nfp_dumpspec_rtsym *spec, struct nfp_dump_state *dump) @@ -479,6 +572,7 @@ nfp_dump_for_tlv(struct nfp_pf *pf, struct nfp_dump_tl *tl, void *param) { struct nfp_dumpspec_rtsym *spec_rtsym; struct nfp_dump_state *dump = param; + struct nfp_dumpspec_csr *spec_csr; int err; switch (be32_to_cpu(tl->type)) { @@ -487,6 +581,14 @@ nfp_dump_for_tlv(struct nfp_pf *pf, struct nfp_dump_tl *tl, void *param) if (err) return err; break; + case NFP_DUMPSPEC_TYPE_CPP_CSR: + case NFP_DUMPSPEC_TYPE_XPB_CSR: + case NFP_DUMPSPEC_TYPE_ME_CSR: + spec_csr = (struct nfp_dumpspec_csr *)tl; + err = nfp_dump_csr_range(pf, spec_csr, dump); + if (err) + return err; + break; case NFP_DUMPSPEC_TYPE_RTSYM: spec_rtsym = (struct nfp_dumpspec_rtsym *)tl; err = nfp_dump_single_rtsym(pf, spec_rtsym, dump);