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mtd: nand: Add a NAND page I/O request type

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Use an enum to differentiate the type of I/O (reading or writing a
page). Also update the request iterator.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Link: https://lore.kernel.org/linux-mtd/20200827085208.16276-5-miquel.raynal@bootlin.com
This commit is contained in:
Miquel Raynal 2020-08-27 10:51:52 +02:00
parent f2f64c1e92
commit 701981cab0
2 changed files with 18 additions and 4 deletions
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4
drivers/mtd/nand/spi/core.c
View file

@ -497,7 +497,7 @@ static int spinand_mtd_read(struct mtd_info *mtd, loff_t from,
mutex_lock(&spinand->lock);
nanddev_io_for_each_page(nand, from, ops, &iter) {
nanddev_io_for_each_page(nand, NAND_PAGE_READ, from, ops, &iter) {
ret = spinand_select_target(spinand, iter.req.pos.target);
if (ret)
break;
@ -545,7 +545,7 @@ static int spinand_mtd_write(struct mtd_info *mtd, loff_t to,
mutex_lock(&spinand->lock);
nanddev_io_for_each_page(nand, to, ops, &iter) {
nanddev_io_for_each_page(nand, NAND_PAGE_WRITE, to, ops, &iter) {
ret = spinand_select_target(spinand, iter.req.pos.target);
if (ret)
break;

18
include/linux/mtd/nand.h
View file

@ -82,8 +82,19 @@ struct nand_pos {
unsigned int page;
};
/**
* enum nand_page_io_req_type - Direction of an I/O request
* @NAND_PAGE_READ: from the chip, to the controller
* @NAND_PAGE_WRITE: from the controller, to the chip
*/
enum nand_page_io_req_type {
NAND_PAGE_READ = 0,
NAND_PAGE_WRITE,
};
/**
* struct nand_page_io_req - NAND I/O request object
* @type: the type of page I/O: read or write
* @pos: the position this I/O request is targeting
* @dataoffs: the offset within the page
* @datalen: number of data bytes to read from/write to this page
@ -99,6 +110,7 @@ struct nand_pos {
* specific commands/operations.
*/
struct nand_page_io_req {
enum nand_page_io_req_type type;
struct nand_pos pos;
unsigned int dataoffs;
unsigned int datalen;
@ -638,11 +650,13 @@ static inline void nanddev_pos_next_page(struct nand_device *nand,
* layer.
*/
static inline void nanddev_io_iter_init(struct nand_device *nand,
enum nand_page_io_req_type reqtype,
loff_t offs, struct mtd_oob_ops *req,
struct nand_io_iter *iter)
{
struct mtd_info *mtd = nanddev_to_mtd(nand);
iter->req.type = reqtype;
iter->req.mode = req->mode;
iter->req.dataoffs = nanddev_offs_to_pos(nand, offs, &iter->req.pos);
iter->req.ooboffs = req->ooboffs;
@ -712,8 +726,8 @@ static inline bool nanddev_io_iter_end(struct nand_device *nand,
*
* Should be used for iterate over pages that are contained in an MTD request.
*/
#define nanddev_io_for_each_page(nand, start, req, iter) \
for (nanddev_io_iter_init(nand, start, req, iter); \
#define nanddev_io_for_each_page(nand, type, start, req, iter) \
for (nanddev_io_iter_init(nand, type, start, req, iter); \
!nanddev_io_iter_end(nand, iter); \
nanddev_io_iter_next_page(nand, iter))