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nfp: nfpcore: add rtsym writing function

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Add an rtsym API function that combines the lookup of a symbol and the
writing of a value to it. Values can be written as unsigned 32 or 64 bits.

Signed-off-by: John Hurley <john.hurley@netronome.com>
Reviewed-by: Pieter Jansen van Vuuren <pieter.jansenvanvuuren@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
John Hurley 2018-05-23 19:22:49 -07:00 committed by David S. Miller
parent 24f132e29c
commit 1945ca7a81
2 changed files with 45 additions and 0 deletions
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2
drivers/net/ethernet/netronome/nfp/nfpcore/nfp_nffw.h
View File

@ -100,6 +100,8 @@ nfp_rtsym_lookup(struct nfp_rtsym_table *rtbl, const char *name);
u64 nfp_rtsym_read_le(struct nfp_rtsym_table *rtbl, const char *name,
int *error);
int nfp_rtsym_write_le(struct nfp_rtsym_table *rtbl, const char *name,
u64 value);
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);

43
drivers/net/ethernet/netronome/nfp/nfpcore/nfp_rtsym.c
View File

@ -286,6 +286,49 @@ u64 nfp_rtsym_read_le(struct nfp_rtsym_table *rtbl, const char *name,
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)