diff options
Diffstat (limited to 'drivers/net/ethernet/netronome/nfp/nfpcore/nfp_rtsym.c')
| -rw-r--r-- | drivers/net/ethernet/netronome/nfp/nfpcore/nfp_rtsym.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_rtsym.c b/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_rtsym.c index 46107aefad1cc..9e34216578daf 100644 --- a/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_rtsym.c +++ b/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_rtsym.c @@ -286,6 +286,49 @@ exit: return val; } +/** + * nfp_rtsym_write_le() - Write an unsigned scalar value to a symbol + * @rtbl: NFP RTsym table + * @name: Symbol name + * @value: Value to write + * + * Lookup a symbol and write a value to it. Symbol can be 4 or 8 bytes in size. + * If 4 bytes then the lower 32-bits of 'value' are used. Value will be + * written as simple little-endian unsigned value. + * + * Return: 0 on success or error code. + */ +int nfp_rtsym_write_le(struct nfp_rtsym_table *rtbl, const char *name, + u64 value) +{ + const struct nfp_rtsym *sym; + int err; + u32 id; + + sym = nfp_rtsym_lookup(rtbl, name); + if (!sym) + return -ENOENT; + + id = NFP_CPP_ISLAND_ID(sym->target, NFP_CPP_ACTION_RW, 0, sym->domain); + + switch (sym->size) { + case 4: + err = nfp_cpp_writel(rtbl->cpp, id, sym->addr, value); + break; + case 8: + err = nfp_cpp_writeq(rtbl->cpp, id, sym->addr, value); + break; + default: + nfp_err(rtbl->cpp, + "rtsym '%s' unsupported or non-scalar size: %lld\n", + name, sym->size); + err = -EINVAL; + break; + } + + return err; +} + u8 __iomem * nfp_rtsym_map(struct nfp_rtsym_table *rtbl, const char *name, const char *id, unsigned int min_size, struct nfp_cpp_area **area) |