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Commit 1945ca7a authored by John Hurley's avatar John Hurley Committed by David S. Miller
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nfp: nfpcore: add rtsym writing function 



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: default avatarJohn Hurley <john.hurley@netronome.com>
Reviewed-by: default avatarPieter Jansen van Vuuren <pieter.jansenvanvuuren@netronome.com>
Reviewed-by: default avatarJakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 24f132e2

drivers/net/ethernet/netronome/nfp/nfpcore/nfp_nffw.h

+2 −0
Original line number Diff line number Diff line
@@ -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);

drivers/net/ethernet/netronome/nfp/nfpcore/nfp_rtsym.c

+43 −0
Original line number Diff line number Diff line
@@ -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)