diff options
| -rw-r--r-- | drivers/mtd/nand/raw/brcmnand/brcmnand.c | 7 | ||||
| -rw-r--r-- | drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c | 4 | ||||
| -rw-r--r-- | drivers/mtd/nand/raw/marvell_nand.c | 43 | ||||
| -rw-r--r-- | drivers/mtd/nand/raw/nand_base.c | 7 | ||||
| -rw-r--r-- | drivers/mtd/nand/raw/nand_bbt.c | 4 | ||||
| -rw-r--r-- | drivers/mtd/nand/raw/qcom_nandc.c | 8 | ||||
| -rw-r--r-- | drivers/mtd/nand/raw/sunxi_nand.c | 11 | ||||
| -rw-r--r-- | include/linux/mtd/rawnand.h | 21 |
8 files changed, 56 insertions, 49 deletions
diff --git a/drivers/mtd/nand/raw/brcmnand/brcmnand.c b/drivers/mtd/nand/raw/brcmnand/brcmnand.c index 482c6f093f99..ce0b8ffc7812 100644 --- a/drivers/mtd/nand/raw/brcmnand/brcmnand.c +++ b/drivers/mtd/nand/raw/brcmnand/brcmnand.c @@ -1676,11 +1676,8 @@ static int brcmstb_nand_verify_erased_page(struct mtd_info *mtd, int page = addr >> chip->page_shift; int ret; - if (!buf) { - buf = chip->data_buf; - /* Invalidate page cache */ - chip->pagebuf = -1; - } + if (!buf) + buf = nand_get_data_buf(chip); sas = mtd->oobsize / chip->ecc.steps; diff --git a/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c b/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c index bcf5328cf239..df7071e6da5b 100644 --- a/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c +++ b/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c @@ -1602,7 +1602,7 @@ static int mx23_check_transcription_stamp(struct gpmi_nand_data *this) unsigned int search_area_size_in_strides; unsigned int stride; unsigned int page; - uint8_t *buffer = chip->data_buf; + u8 *buffer = nand_get_data_buf(chip); int saved_chip_number; int found_an_ncb_fingerprint = false; @@ -1664,7 +1664,7 @@ static int mx23_write_transcription_stamp(struct gpmi_nand_data *this) unsigned int block; unsigned int stride; unsigned int page; - uint8_t *buffer = chip->data_buf; + u8 *buffer = nand_get_data_buf(chip); int saved_chip_number; int status; diff --git a/drivers/mtd/nand/raw/marvell_nand.c b/drivers/mtd/nand/raw/marvell_nand.c index f38e5c1b87e4..e81d401ee16c 100644 --- a/drivers/mtd/nand/raw/marvell_nand.c +++ b/drivers/mtd/nand/raw/marvell_nand.c @@ -1083,12 +1083,11 @@ static int marvell_nfc_hw_ecc_hmg_read_page(struct nand_chip *chip, u8 *buf, */ static int marvell_nfc_hw_ecc_hmg_read_oob_raw(struct nand_chip *chip, int page) { - /* Invalidate page cache */ - chip->pagebuf = -1; + u8 *buf = nand_get_data_buf(chip); marvell_nfc_select_target(chip, chip->cur_cs); - return marvell_nfc_hw_ecc_hmg_do_read_page(chip, chip->data_buf, - chip->oob_poi, true, page); + return marvell_nfc_hw_ecc_hmg_do_read_page(chip, buf, chip->oob_poi, + true, page); } /* Hamming write helpers */ @@ -1179,15 +1178,13 @@ static int marvell_nfc_hw_ecc_hmg_write_oob_raw(struct nand_chip *chip, int page) { struct mtd_info *mtd = nand_to_mtd(chip); + u8 *buf = nand_get_data_buf(chip); - /* Invalidate page cache */ - chip->pagebuf = -1; - - memset(chip->data_buf, 0xFF, mtd->writesize); + memset(buf, 0xFF, mtd->writesize); marvell_nfc_select_target(chip, chip->cur_cs); - return marvell_nfc_hw_ecc_hmg_do_write_page(chip, chip->data_buf, - chip->oob_poi, true, page); + return marvell_nfc_hw_ecc_hmg_do_write_page(chip, buf, chip->oob_poi, + true, page); } /* BCH read helpers */ @@ -1434,18 +1431,16 @@ static int marvell_nfc_hw_ecc_bch_read_page(struct nand_chip *chip, static int marvell_nfc_hw_ecc_bch_read_oob_raw(struct nand_chip *chip, int page) { - /* Invalidate page cache */ - chip->pagebuf = -1; + u8 *buf = nand_get_data_buf(chip); - return chip->ecc.read_page_raw(chip, chip->data_buf, true, page); + return chip->ecc.read_page_raw(chip, buf, true, page); } static int marvell_nfc_hw_ecc_bch_read_oob(struct nand_chip *chip, int page) { - /* Invalidate page cache */ - chip->pagebuf = -1; + u8 *buf = nand_get_data_buf(chip); - return chip->ecc.read_page(chip, chip->data_buf, true, page); + return chip->ecc.read_page(chip, buf, true, page); } /* BCH write helpers */ @@ -1619,25 +1614,21 @@ static int marvell_nfc_hw_ecc_bch_write_oob_raw(struct nand_chip *chip, int page) { struct mtd_info *mtd = nand_to_mtd(chip); + u8 *buf = nand_get_data_buf(chip); - /* Invalidate page cache */ - chip->pagebuf = -1; - - memset(chip->data_buf, 0xFF, mtd->writesize); + memset(buf, 0xFF, mtd->writesize); - return chip->ecc.write_page_raw(chip, chip->data_buf, true, page); + return chip->ecc.write_page_raw(chip, buf, true, page); } static int marvell_nfc_hw_ecc_bch_write_oob(struct nand_chip *chip, int page) { struct mtd_info *mtd = nand_to_mtd(chip); + u8 *buf = nand_get_data_buf(chip); - /* Invalidate page cache */ - chip->pagebuf = -1; - - memset(chip->data_buf, 0xFF, mtd->writesize); + memset(buf, 0xFF, mtd->writesize); - return chip->ecc.write_page(chip, chip->data_buf, true, page); + return chip->ecc.write_page(chip, buf, true, page); } /* NAND framework ->exec_op() hooks and related helpers */ diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c index 071a0c658bfe..fe8119c6cd61 100644 --- a/drivers/mtd/nand/raw/nand_base.c +++ b/drivers/mtd/nand/raw/nand_base.c @@ -4004,10 +4004,9 @@ static int nand_do_write_ops(struct nand_chip *chip, loff_t to, __func__, buf); if (part_pagewr) bytes = min_t(int, bytes - column, writelen); - chip->pagebuf = -1; - memset(chip->data_buf, 0xff, mtd->writesize); - memcpy(&chip->data_buf[column], buf, bytes); - wbuf = chip->data_buf; + wbuf = nand_get_data_buf(chip); + memset(wbuf, 0xff, mtd->writesize); + memcpy(&wbuf[column], buf, bytes); } if (unlikely(oob)) { diff --git a/drivers/mtd/nand/raw/nand_bbt.c b/drivers/mtd/nand/raw/nand_bbt.c index 19a2b563acdf..fff803695b2d 100644 --- a/drivers/mtd/nand/raw/nand_bbt.c +++ b/drivers/mtd/nand/raw/nand_bbt.c @@ -901,7 +901,9 @@ static int write_bbt(struct nand_chip *this, uint8_t *buf, static inline int nand_memory_bbt(struct nand_chip *this, struct nand_bbt_descr *bd) { - return create_bbt(this, this->data_buf, bd, -1); + u8 *pagebuf = nand_get_data_buf(this); + + return create_bbt(this, pagebuf, bd, -1); } /** diff --git a/drivers/mtd/nand/raw/qcom_nandc.c b/drivers/mtd/nand/raw/qcom_nandc.c index 920e7375084f..6ead55e05b80 100644 --- a/drivers/mtd/nand/raw/qcom_nandc.c +++ b/drivers/mtd/nand/raw/qcom_nandc.c @@ -1680,14 +1680,12 @@ check_for_erased_page(struct qcom_nand_host *host, u8 *data_buf, u8 *cw_data_buf, *cw_oob_buf; int cw, data_size, oob_size, ret = 0; - if (!data_buf) { - data_buf = chip->data_buf; - chip->pagebuf = -1; - } + if (!data_buf) + data_buf = nand_get_data_buf(chip); if (!oob_buf) { + nand_get_data_buf(chip); oob_buf = chip->oob_poi; - chip->pagebuf = -1; } for_each_set_bit(cw, &uncorrectable_cws, ecc->steps) { diff --git a/drivers/mtd/nand/raw/sunxi_nand.c b/drivers/mtd/nand/raw/sunxi_nand.c index 4282bc477761..d206819c962a 100644 --- a/drivers/mtd/nand/raw/sunxi_nand.c +++ b/drivers/mtd/nand/raw/sunxi_nand.c @@ -1313,20 +1313,19 @@ pio_fallback: static int sunxi_nfc_hw_ecc_read_oob(struct nand_chip *nand, int page) { - nand->pagebuf = -1; + u8 *buf = nand_get_data_buf(nand); - return nand->ecc.read_page(nand, nand->data_buf, 1, page); + return nand->ecc.read_page(nand, buf, 1, page); } static int sunxi_nfc_hw_ecc_write_oob(struct nand_chip *nand, int page) { struct mtd_info *mtd = nand_to_mtd(nand); + u8 *buf = nand_get_data_buf(nand); int ret; - nand->pagebuf = -1; - - memset(nand->data_buf, 0xff, mtd->writesize); - ret = nand->ecc.write_page(nand, nand->data_buf, 1, page); + memset(buf, 0xff, mtd->writesize); + ret = nand->ecc.write_page(nand, buf, 1, page); if (ret) return ret; diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h index 58887cb2c7ea..253f9942a919 100644 --- a/include/linux/mtd/rawnand.h +++ b/include/linux/mtd/rawnand.h @@ -1350,4 +1350,25 @@ int nand_gpio_waitrdy(struct nand_chip *chip, struct gpio_desc *gpiod, void nand_select_target(struct nand_chip *chip, unsigned int cs); void nand_deselect_target(struct nand_chip *chip); +/** + * nand_get_data_buf() - Get the internal page buffer + * @chip: NAND chip object + * + * Returns the pre-allocated page buffer after invalidating the cache. This + * function should be used by drivers that do not want to allocate their own + * bounce buffer and still need such a buffer for specific operations (most + * commonly when reading OOB data only). + * + * Be careful to never call this function in the write/write_oob path, because + * the core may have placed the data to be written out in this buffer. + * + * Return: pointer to the page cache buffer + */ +static inline void *nand_get_data_buf(struct nand_chip *chip) +{ + chip->pagebuf = -1; + + return chip->data_buf; +} + #endif /* __LINUX_MTD_RAWNAND_H */ |