From: Miquel Raynal <miquel.raynal@bootlin.com>
To: William Zhang <william.zhang@broadcom.com>
Cc: Broadcom Kernel List <bcm-kernel-feedback-list@broadcom.com>,
Linux MTD List <linux-mtd@lists.infradead.org>,
f.fainelli@gmail.com, rafal@milecki.pl, kursad.oney@broadcom.com,
joel.peshkin@broadcom.com, computersforpeace@gmail.com,
anand.gore@broadcom.com, dregan@mail.com,
kamal.dasu@broadcom.com, tomer.yacoby@broadcom.com,
dan.beygelman@broadcom.com, linux-kernel@vger.kernel.org,
Vignesh Raghavendra <vigneshr@ti.com>,
Richard Weinberger <richard@nod.at>,
Kamal Dasu <kdasu.kdev@gmail.com>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 10/12] mtd: rawnand: brcmnand: Add BCMBCA read data bus interface
Date: Wed, 7 Jun 2023 10:22:32 +0200 [thread overview]
Message-ID: <20230607102232.17c4a27b@xps-13> (raw)
In-Reply-To: <20230606231252.94838-11-william.zhang@broadcom.com>
Hi William,
william.zhang@broadcom.com wrote on Tue, 6 Jun 2023 16:12:50 -0700:
> The BCMBCA broadband SoC integrates the NAND controller differently than
> STB, iProc and other SoCs. It has different endianness for NAND cache
> data and ONFI parameter data.
>
> Add a SoC read data bus shim for BCMBCA to meet the specific SoC need
> and performance improvement using the optimized memcpy function on NAND
> cache memory.
>
> Signed-off-by: William Zhang <william.zhang@broadcom.com>
> ---
>
> drivers/mtd/nand/raw/brcmnand/bcmbca_nand.c | 36 +++++++++++++++++
> drivers/mtd/nand/raw/brcmnand/brcmnand.c | 44 ++++++++++++++-------
> drivers/mtd/nand/raw/brcmnand/brcmnand.h | 2 +
> 3 files changed, 68 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/mtd/nand/raw/brcmnand/bcmbca_nand.c b/drivers/mtd/nand/raw/brcmnand/bcmbca_nand.c
> index 7e48b6a0bfa2..899103a62c98 100644
> --- a/drivers/mtd/nand/raw/brcmnand/bcmbca_nand.c
> +++ b/drivers/mtd/nand/raw/brcmnand/bcmbca_nand.c
> @@ -26,6 +26,18 @@ enum {
> BCMBCA_CTLRDY = BIT(4),
> };
>
> +#if defined(CONFIG_ARM64)
> +#define ALIGN_REQ 8
> +#else
> +#define ALIGN_REQ 4
> +#endif
> +
> +static inline bool bcmbca_nand_is_buf_aligned(void *flash_cache, void *buffer)
> +{
> + return IS_ALIGNED((uintptr_t)buffer, ALIGN_REQ) &&
> + IS_ALIGNED((uintptr_t)flash_cache, ALIGN_REQ);
> +}
> +
> static bool bcmbca_nand_intc_ack(struct brcmnand_soc *soc)
> {
> struct bcmbca_nand_soc *priv =
> @@ -56,6 +68,29 @@ static void bcmbca_nand_intc_set(struct brcmnand_soc *soc, bool en)
> brcmnand_writel(val, mmio);
> }
>
> +static void bcmbca_read_data_bus(struct brcmnand_soc *soc,
> + void __iomem *flash_cache, u32 *buffer,
> + int fc_words, bool is_param)
> +{
> + int i;
> +
> + if (!is_param) {
> + /*
> + * memcpy can do unaligned aligned access depending on source
> + * and dest address, which is incompatible with nand cache. Fallback
> + * to the memcpy for io version
> + */
> + if (bcmbca_nand_is_buf_aligned(flash_cache, buffer))
> + memcpy((void *)buffer, (void *)flash_cache, fc_words * 4);
> + else
> + memcpy_fromio((void *)buffer, (void *)flash_cache, fc_words * 4);
> + } else {
> + /* Flash cache has same endian as the host for parameter pages */
> + for (i = 0; i < fc_words; i++, buffer++)
> + *buffer = __raw_readl(flash_cache + i * 4);
> + }
> +}
> +
> static int bcmbca_nand_probe(struct platform_device *pdev)
> {
> struct device *dev = &pdev->dev;
> @@ -75,6 +110,7 @@ static int bcmbca_nand_probe(struct platform_device *pdev)
>
> soc->ctlrdy_ack = bcmbca_nand_intc_ack;
> soc->ctlrdy_set_enabled = bcmbca_nand_intc_set;
> + soc->read_data_bus = bcmbca_read_data_bus;
>
> return brcmnand_probe(pdev, soc);
> }
> diff --git a/drivers/mtd/nand/raw/brcmnand/brcmnand.c b/drivers/mtd/nand/raw/brcmnand/brcmnand.c
> index d920e88c7f5b..656be4d73016 100644
> --- a/drivers/mtd/nand/raw/brcmnand/brcmnand.c
> +++ b/drivers/mtd/nand/raw/brcmnand/brcmnand.c
> @@ -814,6 +814,30 @@ static inline u32 edu_readl(struct brcmnand_controller *ctrl,
> return brcmnand_readl(ctrl->edu_base + offs);
> }
>
> +static inline void brcmnand_read_data_bus(struct brcmnand_controller *ctrl,
> + void __iomem *flash_cache, u32 *buffer,
> + int fc_words, bool is_param)
> +{
> + struct brcmnand_soc *soc = ctrl->soc;
> + int i;
> +
> + if (soc->read_data_bus) {
> + soc->read_data_bus(soc, flash_cache, buffer, fc_words, is_param);
> + } else {
> + if (!is_param) {
> + for (i = 0; i < fc_words; i++, buffer++)
> + *buffer = brcmnand_read_fc(ctrl, i);
> + } else {
> + for (i = 0; i < fc_words; i++)
> + /*
> + * Flash cache is big endian for parameter pages, at
> + * least on STB SoCs
> + */
> + buffer[i] = be32_to_cpu(brcmnand_read_fc(ctrl, i));
> + }
> + }
Perhaps we could have a single function that is statically assigned at
probe time instead of a first helper with two conditions which calls in
one case another hook... This can be simplified I guess.
> +}
> +
> static void brcmnand_clear_ecc_addr(struct brcmnand_controller *ctrl)
> {
>
> @@ -1811,20 +1835,11 @@ static void brcmnand_cmdfunc(struct nand_chip *chip, unsigned command,
> native_cmd == CMD_PARAMETER_CHANGE_COL) {
> /* Copy flash cache word-wise */
> u32 *flash_cache = (u32 *)ctrl->flash_cache;
> - int i;
>
> brcmnand_soc_data_bus_prepare(ctrl->soc, true);
>
> - /*
> - * Must cache the FLASH_CACHE now, since changes in
> - * SECTOR_SIZE_1K may invalidate it
> - */
> - for (i = 0; i < FC_WORDS; i++)
> - /*
> - * Flash cache is big endian for parameter pages, at
> - * least on STB SoCs
> - */
> - flash_cache[i] = be32_to_cpu(brcmnand_read_fc(ctrl, i));
> + brcmnand_read_data_bus(ctrl, ctrl->nand_fc, flash_cache,
> + FC_WORDS, true);
>
> brcmnand_soc_data_bus_unprepare(ctrl->soc, true);
>
> @@ -2137,7 +2152,7 @@ static int brcmnand_read_by_pio(struct mtd_info *mtd, struct nand_chip *chip,
> {
> struct brcmnand_host *host = nand_get_controller_data(chip);
> struct brcmnand_controller *ctrl = host->ctrl;
> - int i, j, ret = 0;
> + int i, ret = 0;
>
> brcmnand_clear_ecc_addr(ctrl);
>
> @@ -2150,8 +2165,9 @@ static int brcmnand_read_by_pio(struct mtd_info *mtd, struct nand_chip *chip,
> if (likely(buf)) {
> brcmnand_soc_data_bus_prepare(ctrl->soc, false);
>
> - for (j = 0; j < FC_WORDS; j++, buf++)
> - *buf = brcmnand_read_fc(ctrl, j);
> + brcmnand_read_data_bus(ctrl, ctrl->nand_fc, buf,
> + FC_WORDS, false);
> + buf += FC_WORDS;
>
> brcmnand_soc_data_bus_unprepare(ctrl->soc, false);
> }
> diff --git a/drivers/mtd/nand/raw/brcmnand/brcmnand.h b/drivers/mtd/nand/raw/brcmnand/brcmnand.h
> index f1f93d85f50d..88819bc395f8 100644
> --- a/drivers/mtd/nand/raw/brcmnand/brcmnand.h
> +++ b/drivers/mtd/nand/raw/brcmnand/brcmnand.h
> @@ -24,6 +24,8 @@ struct brcmnand_soc {
> void (*ctlrdy_set_enabled)(struct brcmnand_soc *soc, bool en);
> void (*prepare_data_bus)(struct brcmnand_soc *soc, bool prepare,
> bool is_param);
> + void (*read_data_bus)(struct brcmnand_soc *soc, void __iomem *flash_cache,
> + u32 *buffer, int fc_words, bool is_param);
> const struct brcmnand_io_ops *ops;
> };
>
Thanks,
Miquèl
next prev parent reply other threads:[~2023-06-07 8:22 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-06 23:12 [PATCH 00/12] mtd: rawnand: brcmnand: driver and doc updates William Zhang
2023-06-06 23:12 ` [PATCH 01/12] mtd: rawnand: brcmnand: Fix ECC level field setting for v7.2 controller William Zhang
2023-06-07 8:06 ` Miquel Raynal
2023-06-06 23:12 ` [PATCH 02/12] mtd: rawnand: brcmnand: Fix potential false time out warning William Zhang
2023-06-06 23:12 ` [PATCH 03/12] mtd: rawnand: brcmnand: Fix crash during the panic_write William Zhang
2023-06-06 23:12 ` [PATCH 04/12] mtd: rawnand: brcmnand: Fix potential out-of-bounds access in oob write William Zhang
2023-06-07 8:09 ` Miquel Raynal
2023-06-06 23:12 ` [PATCH 05/12] dt-bindings: mtd: brcmnand: Updates for bcmbca SoCs William Zhang
2023-06-07 8:14 ` Miquel Raynal
2023-06-07 20:01 ` William Zhang
2023-06-09 8:58 ` Miquel Raynal
2023-06-09 19:05 ` William Zhang
2023-06-12 17:43 ` Miquel Raynal
2023-06-14 22:46 ` Rob Herring
2023-06-15 0:40 ` William Zhang
2023-06-14 22:43 ` Rob Herring
2023-06-15 0:28 ` William Zhang
2023-06-06 23:12 ` [PATCH 06/12] ARM: dts: broadcom: bcmbca: Add NAND controller node William Zhang
2023-06-06 23:12 ` [PATCH 07/12] arm64: " William Zhang
2023-06-06 23:12 ` [PATCH 08/12] mtd: rawnand: brcmnand: Rename bcm63138 nand driver William Zhang
2023-06-06 23:12 ` [PATCH 09/12] mtd: rawnand: brcmnand: Add new compatible string William Zhang
2023-06-06 23:12 ` [PATCH 10/12] mtd: rawnand: brcmnand: Add BCMBCA read data bus interface William Zhang
2023-06-07 8:20 ` Miquel Raynal
2023-06-07 20:12 ` William Zhang
2023-06-08 6:15 ` Miquel Raynal
2023-06-08 19:04 ` William Zhang
2023-06-07 8:22 ` Miquel Raynal [this message]
2023-06-07 20:24 ` William Zhang
2023-06-08 6:18 ` Miquel Raynal
2023-06-08 19:10 ` William Zhang
2023-06-09 8:35 ` Miquel Raynal
2023-06-09 19:16 ` William Zhang
2023-06-12 17:49 ` Miquel Raynal
2023-06-12 17:53 ` Miquel Raynal
2023-06-12 19:18 ` William Zhang
2023-06-13 6:42 ` Miquel Raynal
2023-06-14 0:00 ` William Zhang
2023-06-14 6:22 ` Miquel Raynal
2023-06-14 23:52 ` William Zhang
2023-06-12 19:03 ` William Zhang
2023-06-11 9:54 ` kernel test robot
2023-06-06 23:12 ` [PATCH 11/12] mtd: rawnand: brcmnand: Add support for getting ecc setting from strap William Zhang
2023-06-07 8:25 ` Miquel Raynal
2023-06-06 23:12 ` [PATCH 12/12] mtd: rawnand: brcmnand: Support write protection setting from dts William Zhang
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