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authorSegher Boessenkool <segher@kernel.crashing.org>2007-05-02 12:18:41 +0200
committerDavid Woodhouse <dwmw2@infradead.org>2007-05-02 11:56:33 +0100
commitd7e5a5462f68270ed66efff22b1981be57a28c19 (patch)
treed8125b02762dfd169d110fb67c6f9a7acb686939 /include/linux/rslib.h
parent7c96b7a146eb81d13be738709c36752c20abe4fc (diff)
[RSLIB] Support non-canonical GF representations
For the CAFÉ NAND controller, we need to support non-canonical representations of the Galois field. Allow the caller to provide its own function for generating the field, and CAFÉ can use rslib instead of its own implementation. Signed-off-by: Segher Boessenkool <segher@kernel.crashing.org> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Diffstat (limited to 'include/linux/rslib.h')
-rw-r--r--include/linux/rslib.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/rslib.h b/include/linux/rslib.h
index ace25acfdc9..746580c1939 100644
--- a/include/linux/rslib.h
+++ b/include/linux/rslib.h
@@ -34,6 +34,7 @@
* @prim: Primitive element, index form
* @iprim: prim-th root of 1, index form
* @gfpoly: The primitive generator polynominal
+ * @gffunc: Function to generate the field, if non-canonical representation
* @users: Users of this structure
* @list: List entry for the rs control list
*/
@@ -48,6 +49,7 @@ struct rs_control {
int prim;
int iprim;
int gfpoly;
+ int (*gffunc)(int);
int users;
struct list_head list;
};
@@ -77,6 +79,8 @@ int decode_rs16(struct rs_control *rs, uint16_t *data, uint16_t *par, int len,
/* Create or get a matching rs control structure */
struct rs_control *init_rs(int symsize, int gfpoly, int fcr, int prim,
int nroots);
+struct rs_control *init_rs_non_canonical(int symsize, int (*func)(int),
+ int fcr, int prim, int nroots);
/* Release a rs control structure */
void free_rs(struct rs_control *rs);