From: Chuanhong Guo Date: Thu, 7 Apr 2022 02:05:25 +0000 (+0800) Subject: mediatek: v5.15: backport spi-mem ecc support X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=861efe158ac56da2e00637aed704a77994bec54c;p=openwrt%2Fstaging%2Fsvanheule.git mediatek: v5.15: backport spi-mem ecc support Signed-off-by: Chuanhong Guo --- diff --git a/target/linux/mediatek/patches-5.15/120-01-v5.18-mtd-nand-ecc-Add-infrastructure-to-support-hardware-.patch b/target/linux/mediatek/patches-5.15/120-01-v5.18-mtd-nand-ecc-Add-infrastructure-to-support-hardware-.patch new file mode 100644 index 0000000000..b6b069d234 --- /dev/null +++ b/target/linux/mediatek/patches-5.15/120-01-v5.18-mtd-nand-ecc-Add-infrastructure-to-support-hardware-.patch @@ -0,0 +1,224 @@ +From ad4944aa0b02cb043afe20bc2a018c161e65c992 Mon Sep 17 00:00:00 2001 +From: Miquel Raynal +Date: Thu, 16 Dec 2021 12:16:38 +0100 +Subject: [PATCH 01/15] mtd: nand: ecc: Add infrastructure to support hardware + engines + +Add the necessary helpers to register/unregister hardware ECC engines +that will be called from ECC engine drivers. + +Also add helpers to get the right engine from the user +perspective. Keep a reference of the in use ECC engine in order to +prevent modules to be unloaded. Put the reference when the engine gets +retired. + +A static list of hardware (only) ECC engines is setup to keep track of +the registered engines. + +Signed-off-by: Miquel Raynal +Link: https://lore.kernel.org/linux-mtd/20211216111654.238086-13-miquel.raynal@bootlin.com +(cherry picked from commit 96489c1c0b53131b0e1ec33e2060538379ad6152) +--- + drivers/mtd/nand/core.c | 10 +++-- + drivers/mtd/nand/ecc.c | 88 ++++++++++++++++++++++++++++++++++++++++ + include/linux/mtd/nand.h | 28 +++++++++++++ + 3 files changed, 123 insertions(+), 3 deletions(-) + +diff --git a/drivers/mtd/nand/core.c b/drivers/mtd/nand/core.c +index 5e13a03d2b32..b228b4d13b7a 100644 +--- a/drivers/mtd/nand/core.c ++++ b/drivers/mtd/nand/core.c +@@ -232,7 +232,9 @@ static int nanddev_get_ecc_engine(struct nand_device *nand) + nand->ecc.engine = nand_ecc_get_on_die_hw_engine(nand); + break; + case NAND_ECC_ENGINE_TYPE_ON_HOST: +- pr_err("On-host hardware ECC engines not supported yet\n"); ++ nand->ecc.engine = nand_ecc_get_on_host_hw_engine(nand); ++ if (PTR_ERR(nand->ecc.engine) == -EPROBE_DEFER) ++ return -EPROBE_DEFER; + break; + default: + pr_err("Missing ECC engine type\n"); +@@ -252,7 +254,7 @@ static int nanddev_put_ecc_engine(struct nand_device *nand) + { + switch (nand->ecc.ctx.conf.engine_type) { + case NAND_ECC_ENGINE_TYPE_ON_HOST: +- pr_err("On-host hardware ECC engines not supported yet\n"); ++ nand_ecc_put_on_host_hw_engine(nand); + break; + case NAND_ECC_ENGINE_TYPE_NONE: + case NAND_ECC_ENGINE_TYPE_SOFT: +@@ -297,7 +299,9 @@ int nanddev_ecc_engine_init(struct nand_device *nand) + /* Look for the ECC engine to use */ + ret = nanddev_get_ecc_engine(nand); + if (ret) { +- pr_err("No ECC engine found\n"); ++ if (ret != -EPROBE_DEFER) ++ pr_err("No ECC engine found\n"); ++ + return ret; + } + +diff --git a/drivers/mtd/nand/ecc.c b/drivers/mtd/nand/ecc.c +index 6c43dfda01d4..078f5ec38de3 100644 +--- a/drivers/mtd/nand/ecc.c ++++ b/drivers/mtd/nand/ecc.c +@@ -96,6 +96,12 @@ + #include + #include + #include ++#include ++#include ++#include ++ ++static LIST_HEAD(on_host_hw_engines); ++static DEFINE_MUTEX(on_host_hw_engines_mutex); + + /** + * nand_ecc_init_ctx - Init the ECC engine context +@@ -611,6 +617,88 @@ struct nand_ecc_engine *nand_ecc_get_on_die_hw_engine(struct nand_device *nand) + } + EXPORT_SYMBOL(nand_ecc_get_on_die_hw_engine); + ++int nand_ecc_register_on_host_hw_engine(struct nand_ecc_engine *engine) ++{ ++ struct nand_ecc_engine *item; ++ ++ if (!engine) ++ return -EINVAL; ++ ++ /* Prevent multiple registrations of one engine */ ++ list_for_each_entry(item, &on_host_hw_engines, node) ++ if (item == engine) ++ return 0; ++ ++ mutex_lock(&on_host_hw_engines_mutex); ++ list_add_tail(&engine->node, &on_host_hw_engines); ++ mutex_unlock(&on_host_hw_engines_mutex); ++ ++ return 0; ++} ++EXPORT_SYMBOL(nand_ecc_register_on_host_hw_engine); ++ ++int nand_ecc_unregister_on_host_hw_engine(struct nand_ecc_engine *engine) ++{ ++ if (!engine) ++ return -EINVAL; ++ ++ mutex_lock(&on_host_hw_engines_mutex); ++ list_del(&engine->node); ++ mutex_unlock(&on_host_hw_engines_mutex); ++ ++ return 0; ++} ++EXPORT_SYMBOL(nand_ecc_unregister_on_host_hw_engine); ++ ++static struct nand_ecc_engine *nand_ecc_match_on_host_hw_engine(struct device *dev) ++{ ++ struct nand_ecc_engine *item; ++ ++ list_for_each_entry(item, &on_host_hw_engines, node) ++ if (item->dev == dev) ++ return item; ++ ++ return NULL; ++} ++ ++struct nand_ecc_engine *nand_ecc_get_on_host_hw_engine(struct nand_device *nand) ++{ ++ struct nand_ecc_engine *engine = NULL; ++ struct device *dev = &nand->mtd.dev; ++ struct platform_device *pdev; ++ struct device_node *np; ++ ++ if (list_empty(&on_host_hw_engines)) ++ return NULL; ++ ++ /* Check for an explicit nand-ecc-engine property */ ++ np = of_parse_phandle(dev->of_node, "nand-ecc-engine", 0); ++ if (np) { ++ pdev = of_find_device_by_node(np); ++ if (!pdev) ++ return ERR_PTR(-EPROBE_DEFER); ++ ++ engine = nand_ecc_match_on_host_hw_engine(&pdev->dev); ++ platform_device_put(pdev); ++ of_node_put(np); ++ ++ if (!engine) ++ return ERR_PTR(-EPROBE_DEFER); ++ } ++ ++ if (engine) ++ get_device(engine->dev); ++ ++ return engine; ++} ++EXPORT_SYMBOL(nand_ecc_get_on_host_hw_engine); ++ ++void nand_ecc_put_on_host_hw_engine(struct nand_device *nand) ++{ ++ put_device(nand->ecc.engine->dev); ++} ++EXPORT_SYMBOL(nand_ecc_put_on_host_hw_engine); ++ + MODULE_LICENSE("GPL"); + MODULE_AUTHOR("Miquel Raynal "); + MODULE_DESCRIPTION("Generic ECC engine"); +diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h +index 32fc7edf65b3..4ddd20fe9c9e 100644 +--- a/include/linux/mtd/nand.h ++++ b/include/linux/mtd/nand.h +@@ -263,12 +263,36 @@ struct nand_ecc_engine_ops { + struct nand_page_io_req *req); + }; + ++/** ++ * enum nand_ecc_engine_integration - How the NAND ECC engine is integrated ++ * @NAND_ECC_ENGINE_INTEGRATION_INVALID: Invalid value ++ * @NAND_ECC_ENGINE_INTEGRATION_PIPELINED: Pipelined engine, performs on-the-fly ++ * correction, does not need to copy ++ * data around ++ * @NAND_ECC_ENGINE_INTEGRATION_EXTERNAL: External engine, needs to bring the ++ * data into its own area before use ++ */ ++enum nand_ecc_engine_integration { ++ NAND_ECC_ENGINE_INTEGRATION_INVALID, ++ NAND_ECC_ENGINE_INTEGRATION_PIPELINED, ++ NAND_ECC_ENGINE_INTEGRATION_EXTERNAL, ++}; ++ + /** + * struct nand_ecc_engine - ECC engine abstraction for NAND devices ++ * @dev: Host device ++ * @node: Private field for registration time + * @ops: ECC engine operations ++ * @integration: How the engine is integrated with the host ++ * (only relevant on %NAND_ECC_ENGINE_TYPE_ON_HOST engines) ++ * @priv: Private data + */ + struct nand_ecc_engine { ++ struct device *dev; ++ struct list_head node; + struct nand_ecc_engine_ops *ops; ++ enum nand_ecc_engine_integration integration; ++ void *priv; + }; + + void of_get_nand_ecc_user_config(struct nand_device *nand); +@@ -279,8 +303,12 @@ int nand_ecc_prepare_io_req(struct nand_device *nand, + int nand_ecc_finish_io_req(struct nand_device *nand, + struct nand_page_io_req *req); + bool nand_ecc_is_strong_enough(struct nand_device *nand); ++int nand_ecc_register_on_host_hw_engine(struct nand_ecc_engine *engine); ++int nand_ecc_unregister_on_host_hw_engine(struct nand_ecc_engine *engine); + struct nand_ecc_engine *nand_ecc_get_sw_engine(struct nand_device *nand); + struct nand_ecc_engine *nand_ecc_get_on_die_hw_engine(struct nand_device *nand); ++struct nand_ecc_engine *nand_ecc_get_on_host_hw_engine(struct nand_device *nand); ++void nand_ecc_put_on_host_hw_engine(struct nand_device *nand); + + #if IS_ENABLED(CONFIG_MTD_NAND_ECC_SW_HAMMING) + struct nand_ecc_engine *nand_ecc_sw_hamming_get_engine(void); +-- +2.35.1 + diff --git a/target/linux/mediatek/patches-5.15/120-02-v5.18-mtd-nand-Add-a-new-helper-to-retrieve-the-ECC-contex.patch b/target/linux/mediatek/patches-5.15/120-02-v5.18-mtd-nand-Add-a-new-helper-to-retrieve-the-ECC-contex.patch new file mode 100644 index 0000000000..6522507786 --- /dev/null +++ b/target/linux/mediatek/patches-5.15/120-02-v5.18-mtd-nand-Add-a-new-helper-to-retrieve-the-ECC-contex.patch @@ -0,0 +1,36 @@ +From 840b2f8dd2d0579e517140e1f9bbc482eaf4ed07 Mon Sep 17 00:00:00 2001 +From: Miquel Raynal +Date: Thu, 16 Dec 2021 12:16:39 +0100 +Subject: [PATCH 02/15] mtd: nand: Add a new helper to retrieve the ECC context + +Introduce nand_to_ecc_ctx() which will allow to easily jump to the +private pointer of an ECC context given a NAND device. This is very +handy, from the prepare or finish ECC hook, to get the internal context +out of the NAND device object. + +Signed-off-by: Miquel Raynal +Link: https://lore.kernel.org/linux-mtd/20211216111654.238086-14-miquel.raynal@bootlin.com +(cherry picked from commit cda32a618debd3fad8e42757b198719ae180f8f4) +--- + include/linux/mtd/nand.h | 5 +++++ + 1 file changed, 5 insertions(+) + +diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h +index 4ddd20fe9c9e..b617efa0a881 100644 +--- a/include/linux/mtd/nand.h ++++ b/include/linux/mtd/nand.h +@@ -990,6 +990,11 @@ int nanddev_markbad(struct nand_device *nand, const struct nand_pos *pos); + int nanddev_ecc_engine_init(struct nand_device *nand); + void nanddev_ecc_engine_cleanup(struct nand_device *nand); + ++static inline void *nand_to_ecc_ctx(struct nand_device *nand) ++{ ++ return nand->ecc.ctx.priv; ++} ++ + /* BBT related functions */ + enum nand_bbt_block_status { + NAND_BBT_BLOCK_STATUS_UNKNOWN, +-- +2.35.1 + diff --git a/target/linux/mediatek/patches-5.15/120-03-v5.18-mtd-nand-ecc-Provide-a-helper-to-retrieve-a-pileline.patch b/target/linux/mediatek/patches-5.15/120-03-v5.18-mtd-nand-ecc-Provide-a-helper-to-retrieve-a-pileline.patch new file mode 100644 index 0000000000..ce353a9226 --- /dev/null +++ b/target/linux/mediatek/patches-5.15/120-03-v5.18-mtd-nand-ecc-Provide-a-helper-to-retrieve-a-pileline.patch @@ -0,0 +1,80 @@ +From 784866bc4f9f25e0494b77750f95af2a2619e498 Mon Sep 17 00:00:00 2001 +From: Miquel Raynal +Date: Thu, 16 Dec 2021 12:16:41 +0100 +Subject: [PATCH 03/15] mtd: nand: ecc: Provide a helper to retrieve a + pilelined engine device + +In a pipelined engine situation, we might either have the host which +internally has support for error correction, or have it using an +external hardware block for this purpose. In the former case, the host +is also the ECC engine. In the latter case, it is not. In order to get +the right pointers on the right devices (for example: in order to devm_* +allocate variables), let's introduce this helper which can safely be +called by pipelined ECC engines in order to retrieve the right device +structure. + +Signed-off-by: Miquel Raynal +Link: https://lore.kernel.org/linux-mtd/20211216111654.238086-16-miquel.raynal@bootlin.com +(cherry picked from commit 5145abeb0649acf810a32e63bd762e617a9b3309) +--- + drivers/mtd/nand/ecc.c | 31 +++++++++++++++++++++++++++++++ + include/linux/mtd/nand.h | 1 + + 2 files changed, 32 insertions(+) + +diff --git a/drivers/mtd/nand/ecc.c b/drivers/mtd/nand/ecc.c +index 078f5ec38de3..5250764cedee 100644 +--- a/drivers/mtd/nand/ecc.c ++++ b/drivers/mtd/nand/ecc.c +@@ -699,6 +699,37 @@ void nand_ecc_put_on_host_hw_engine(struct nand_device *nand) + } + EXPORT_SYMBOL(nand_ecc_put_on_host_hw_engine); + ++/* ++ * In the case of a pipelined engine, the device registering the ECC ++ * engine is not necessarily the ECC engine itself but may be a host controller. ++ * It is then useful to provide a helper to retrieve the right device object ++ * which actually represents the ECC engine. ++ */ ++struct device *nand_ecc_get_engine_dev(struct device *host) ++{ ++ struct platform_device *ecc_pdev; ++ struct device_node *np; ++ ++ /* ++ * If the device node contains this property, it means we need to follow ++ * it in order to get the right ECC engine device we are looking for. ++ */ ++ np = of_parse_phandle(host->of_node, "nand-ecc-engine", 0); ++ if (!np) ++ return host; ++ ++ ecc_pdev = of_find_device_by_node(np); ++ if (!ecc_pdev) { ++ of_node_put(np); ++ return NULL; ++ } ++ ++ platform_device_put(ecc_pdev); ++ of_node_put(np); ++ ++ return &ecc_pdev->dev; ++} ++ + MODULE_LICENSE("GPL"); + MODULE_AUTHOR("Miquel Raynal "); + MODULE_DESCRIPTION("Generic ECC engine"); +diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h +index b617efa0a881..615b3e3a3920 100644 +--- a/include/linux/mtd/nand.h ++++ b/include/linux/mtd/nand.h +@@ -309,6 +309,7 @@ struct nand_ecc_engine *nand_ecc_get_sw_engine(struct nand_device *nand); + struct nand_ecc_engine *nand_ecc_get_on_die_hw_engine(struct nand_device *nand); + struct nand_ecc_engine *nand_ecc_get_on_host_hw_engine(struct nand_device *nand); + void nand_ecc_put_on_host_hw_engine(struct nand_device *nand); ++struct device *nand_ecc_get_engine_dev(struct device *host); + + #if IS_ENABLED(CONFIG_MTD_NAND_ECC_SW_HAMMING) + struct nand_ecc_engine *nand_ecc_sw_hamming_get_engine(void); +-- +2.35.1 + diff --git a/target/linux/mediatek/patches-5.15/120-04-v5.18-spi-spi-mem-Introduce-a-capability-structure.patch b/target/linux/mediatek/patches-5.15/120-04-v5.18-spi-spi-mem-Introduce-a-capability-structure.patch new file mode 100644 index 0000000000..bcd2ee8004 --- /dev/null +++ b/target/linux/mediatek/patches-5.15/120-04-v5.18-spi-spi-mem-Introduce-a-capability-structure.patch @@ -0,0 +1,78 @@ +From 3e45577e70cbf8fdc5c13033114989794a3797d5 Mon Sep 17 00:00:00 2001 +From: Miquel Raynal +Date: Thu, 27 Jan 2022 10:17:56 +0100 +Subject: [PATCH 04/15] spi: spi-mem: Introduce a capability structure + +Create a spi_controller_mem_caps structure and put it within the +spi_controller structure close to the spi_controller_mem_ops +strucure. So far the only field in this structure is the support for dtr +operations, but soon we will add another parameter. + +Also create a helper to parse the capabilities and check if the +requested capability has been set or not. + +Signed-off-by: Miquel Raynal +Reviewed-by: Pratyush Yadav +Reviewed-by: Boris Brezillon +Reviewed-by: Tudor Ambarus +Reviewed-by: Mark Brown +Link: https://lore.kernel.org/linux-mtd/20220127091808.1043392-2-miquel.raynal@bootlin.com +(cherry picked from commit 4a3cc7fb6e63bcfdedec25364738f1493345bd20) +--- + include/linux/spi/spi-mem.h | 11 +++++++++++ + include/linux/spi/spi.h | 3 +++ + 2 files changed, 14 insertions(+) + +diff --git a/include/linux/spi/spi-mem.h b/include/linux/spi/spi-mem.h +index 85e2ff7b840d..38e5d45c9842 100644 +--- a/include/linux/spi/spi-mem.h ++++ b/include/linux/spi/spi-mem.h +@@ -285,6 +285,17 @@ struct spi_controller_mem_ops { + unsigned long timeout_ms); + }; + ++/** ++ * struct spi_controller_mem_caps - SPI memory controller capabilities ++ * @dtr: Supports DTR operations ++ */ ++struct spi_controller_mem_caps { ++ bool dtr; ++}; ++ ++#define spi_mem_controller_is_capable(ctlr, cap) \ ++ ((ctlr)->mem_caps && (ctlr)->mem_caps->cap) ++ + /** + * struct spi_mem_driver - SPI memory driver + * @spidrv: inherit from a SPI driver +diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h +index 6b0b686f6f90..8ac58b1a2a9f 100644 +--- a/include/linux/spi/spi.h ++++ b/include/linux/spi/spi.h +@@ -23,6 +23,7 @@ struct software_node; + struct spi_controller; + struct spi_transfer; + struct spi_controller_mem_ops; ++struct spi_controller_mem_caps; + + /* + * INTERFACES between SPI master-side drivers and SPI slave protocol handlers, +@@ -419,6 +420,7 @@ extern struct spi_device *spi_new_ancillary_device(struct spi_device *spi, u8 ch + * @mem_ops: optimized/dedicated operations for interactions with SPI memory. + * This field is optional and should only be implemented if the + * controller has native support for memory like operations. ++ * @mem_caps: controller capabilities for the handling of memory operations. + * @unprepare_message: undo any work done by prepare_message(). + * @slave_abort: abort the ongoing transfer request on an SPI slave controller + * @cs_gpios: LEGACY: array of GPIO descs to use as chip select lines; one per +@@ -643,6 +645,7 @@ struct spi_controller { + + /* Optimized handlers for SPI memory-like operations. */ + const struct spi_controller_mem_ops *mem_ops; ++ const struct spi_controller_mem_caps *mem_caps; + + /* gpio chip select */ + int *cs_gpios; +-- +2.35.1 + diff --git a/target/linux/mediatek/patches-5.15/120-05-v5.18-spi-spi-mem-Check-the-controller-extra-capabilities.patch b/target/linux/mediatek/patches-5.15/120-05-v5.18-spi-spi-mem-Check-the-controller-extra-capabilities.patch new file mode 100644 index 0000000000..20e7bac651 --- /dev/null +++ b/target/linux/mediatek/patches-5.15/120-05-v5.18-spi-spi-mem-Check-the-controller-extra-capabilities.patch @@ -0,0 +1,56 @@ +From c9cae7e1e5c87d0aa76b7bededa5191a0c8cf25a Mon Sep 17 00:00:00 2001 +From: Miquel Raynal +Date: Thu, 27 Jan 2022 10:17:57 +0100 +Subject: [PATCH 05/15] spi: spi-mem: Check the controller extra capabilities + +Controllers can now provide a spi-mem capabilities structure. Let's make +use of it in spi_mem_controller_default_supports_op(). As we want to +check for DTR operations as well as normal operations in a single +helper, let's pull the necessary checks from spi_mem_dtr_supports_op() +for now. + +However, because no controller provide these extra capabilities, this +change has no effect so far. + +Signed-off-by: Miquel Raynal +Reviewed-by: Pratyush Yadav +Reviewed-by: Boris Brezillon +Reviewed-by: Tudor Ambarus +Link: https://lore.kernel.org/linux-mtd/20220127091808.1043392-3-miquel.raynal@bootlin.com +(cherry picked from commit cb7e96ee81edaa48c67d84c14df2cbe464391c37) +--- + drivers/spi/spi-mem.c | 17 +++++++++++++---- + 1 file changed, 13 insertions(+), 4 deletions(-) + +diff --git a/drivers/spi/spi-mem.c b/drivers/spi/spi-mem.c +index 37f4443ce9a0..86e6597bc3dc 100644 +--- a/drivers/spi/spi-mem.c ++++ b/drivers/spi/spi-mem.c +@@ -173,11 +173,20 @@ EXPORT_SYMBOL_GPL(spi_mem_dtr_supports_op); + bool spi_mem_default_supports_op(struct spi_mem *mem, + const struct spi_mem_op *op) + { +- if (op->cmd.dtr || op->addr.dtr || op->dummy.dtr || op->data.dtr) +- return false; ++ struct spi_controller *ctlr = mem->spi->controller; ++ bool op_is_dtr = ++ op->cmd.dtr || op->addr.dtr || op->dummy.dtr || op->data.dtr; + +- if (op->cmd.nbytes != 1) +- return false; ++ if (op_is_dtr) { ++ if (!spi_mem_controller_is_capable(ctlr, dtr)) ++ return false; ++ ++ if (op->cmd.nbytes != 2) ++ return false; ++ } else { ++ if (op->cmd.nbytes != 1) ++ return false; ++ } + + return spi_mem_check_buswidth(mem, op); + } +-- +2.35.1 + diff --git a/target/linux/mediatek/patches-5.15/120-06-v5.18-spi-spi-mem-Kill-the-spi_mem_dtr_supports_op-helper.patch b/target/linux/mediatek/patches-5.15/120-06-v5.18-spi-spi-mem-Kill-the-spi_mem_dtr_supports_op-helper.patch new file mode 100644 index 0000000000..efc0ed526c --- /dev/null +++ b/target/linux/mediatek/patches-5.15/120-06-v5.18-spi-spi-mem-Kill-the-spi_mem_dtr_supports_op-helper.patch @@ -0,0 +1,122 @@ +From 2e5fba82e4aeb72d71230eef2541881615aaf7cf Mon Sep 17 00:00:00 2001 +From: Miquel Raynal +Date: Thu, 27 Jan 2022 10:18:00 +0100 +Subject: [PATCH 06/15] spi: spi-mem: Kill the spi_mem_dtr_supports_op() helper + +Now that spi_mem_default_supports_op() has access to the static +controller capabilities (relating to memory operations), and now that +these capabilities have been filled by the relevant controllers, there +is no need for a specific helper checking only DTR operations, so let's +just kill spi_mem_dtr_supports_op() and simply use +spi_mem_default_supports_op() instead. + +Signed-off-by: Miquel Raynal +Reviewed-by: Pratyush Yadav +Reviewed-by: Boris Brezillon +Reviewed-by: Tudor Ambarus +Link: https://lore.kernel.org/linux-mtd/20220127091808.1043392-6-miquel.raynal@bootlin.com +(cherry picked from commit 9a15efc5d5e6b5beaed0883e5bdcd0b1384c1b20) +--- + drivers/spi/spi-cadence-quadspi.c | 5 +---- + drivers/spi/spi-mem.c | 10 ---------- + drivers/spi/spi-mxic.c | 10 +--------- + include/linux/spi/spi-mem.h | 11 ----------- + 4 files changed, 2 insertions(+), 34 deletions(-) + +diff --git a/drivers/spi/spi-cadence-quadspi.c b/drivers/spi/spi-cadence-quadspi.c +index 101cc71bffa7..2c98d6a9a2aa 100644 +--- a/drivers/spi/spi-cadence-quadspi.c ++++ b/drivers/spi/spi-cadence-quadspi.c +@@ -1252,10 +1252,7 @@ static bool cqspi_supports_mem_op(struct spi_mem *mem, + if (!(all_true || all_false)) + return false; + +- if (all_true) +- return spi_mem_dtr_supports_op(mem, op); +- else +- return spi_mem_default_supports_op(mem, op); ++ return spi_mem_default_supports_op(mem, op); + } + + static int cqspi_of_get_flash_pdata(struct platform_device *pdev, +diff --git a/drivers/spi/spi-mem.c b/drivers/spi/spi-mem.c +index 86e6597bc3dc..ed966d8129eb 100644 +--- a/drivers/spi/spi-mem.c ++++ b/drivers/spi/spi-mem.c +@@ -160,16 +160,6 @@ static bool spi_mem_check_buswidth(struct spi_mem *mem, + return true; + } + +-bool spi_mem_dtr_supports_op(struct spi_mem *mem, +- const struct spi_mem_op *op) +-{ +- if (op->cmd.nbytes != 2) +- return false; +- +- return spi_mem_check_buswidth(mem, op); +-} +-EXPORT_SYMBOL_GPL(spi_mem_dtr_supports_op); +- + bool spi_mem_default_supports_op(struct spi_mem *mem, + const struct spi_mem_op *op) + { +diff --git a/drivers/spi/spi-mxic.c b/drivers/spi/spi-mxic.c +index 45889947afed..e895df09896a 100644 +--- a/drivers/spi/spi-mxic.c ++++ b/drivers/spi/spi-mxic.c +@@ -335,8 +335,6 @@ static int mxic_spi_data_xfer(struct mxic_spi *mxic, const void *txbuf, + static bool mxic_spi_mem_supports_op(struct spi_mem *mem, + const struct spi_mem_op *op) + { +- bool all_false; +- + if (op->data.buswidth > 8 || op->addr.buswidth > 8 || + op->dummy.buswidth > 8 || op->cmd.buswidth > 8) + return false; +@@ -348,13 +346,7 @@ static bool mxic_spi_mem_supports_op(struct spi_mem *mem, + if (op->addr.nbytes > 7) + return false; + +- all_false = !op->cmd.dtr && !op->addr.dtr && !op->dummy.dtr && +- !op->data.dtr; +- +- if (all_false) +- return spi_mem_default_supports_op(mem, op); +- else +- return spi_mem_dtr_supports_op(mem, op); ++ return spi_mem_default_supports_op(mem, op); + } + + static int mxic_spi_mem_exec_op(struct spi_mem *mem, +diff --git a/include/linux/spi/spi-mem.h b/include/linux/spi/spi-mem.h +index 38e5d45c9842..4a1bfe689872 100644 +--- a/include/linux/spi/spi-mem.h ++++ b/include/linux/spi/spi-mem.h +@@ -330,10 +330,6 @@ void spi_controller_dma_unmap_mem_op_data(struct spi_controller *ctlr, + + bool spi_mem_default_supports_op(struct spi_mem *mem, + const struct spi_mem_op *op); +- +-bool spi_mem_dtr_supports_op(struct spi_mem *mem, +- const struct spi_mem_op *op); +- + #else + static inline int + spi_controller_dma_map_mem_op_data(struct spi_controller *ctlr, +@@ -356,13 +352,6 @@ bool spi_mem_default_supports_op(struct spi_mem *mem, + { + return false; + } +- +-static inline +-bool spi_mem_dtr_supports_op(struct spi_mem *mem, +- const struct spi_mem_op *op) +-{ +- return false; +-} + #endif /* CONFIG_SPI_MEM */ + + int spi_mem_adjust_op_size(struct spi_mem *mem, struct spi_mem_op *op); +-- +2.35.1 + diff --git a/target/linux/mediatek/patches-5.15/120-07-v5.18-spi-spi-mem-Add-an-ecc-parameter-to-the-spi_mem_op-s.patch b/target/linux/mediatek/patches-5.15/120-07-v5.18-spi-spi-mem-Add-an-ecc-parameter-to-the-spi_mem_op-s.patch new file mode 100644 index 0000000000..fd9e9e2c48 --- /dev/null +++ b/target/linux/mediatek/patches-5.15/120-07-v5.18-spi-spi-mem-Add-an-ecc-parameter-to-the-spi_mem_op-s.patch @@ -0,0 +1,79 @@ +From 9e7eb0ea442ecb1c3fe443289e288694f10c5148 Mon Sep 17 00:00:00 2001 +From: Miquel Raynal +Date: Thu, 27 Jan 2022 10:18:01 +0100 +Subject: [PATCH 07/15] spi: spi-mem: Add an ecc parameter to the spi_mem_op + structure + +Soon the SPI-NAND core will need a way to request a SPI controller to +enable ECC support for a given operation. This is because of the +pipelined integration of certain ECC engines, which are directly managed +by the SPI controller itself. + +Introduce a spi_mem_op additional field for this purpose: ecc. + +So far this field is left unset and checked to be false by all +the SPI controller drivers in their ->supports_op() hook, as they all +call spi_mem_default_supports_op(). + +Signed-off-by: Miquel Raynal +Acked-by: Pratyush Yadav +Reviewed-by: Boris Brezillon +Reviewed-by: Tudor Ambarus +Link: https://lore.kernel.org/linux-mtd/20220127091808.1043392-7-miquel.raynal@bootlin.com +(cherry picked from commit a433c2cbd75ab76f277364f44e76f32c7df306e7) +--- + drivers/spi/spi-mem.c | 5 +++++ + include/linux/spi/spi-mem.h | 4 ++++ + 2 files changed, 9 insertions(+) + +diff --git a/drivers/spi/spi-mem.c b/drivers/spi/spi-mem.c +index ed966d8129eb..f38ac31961c9 100644 +--- a/drivers/spi/spi-mem.c ++++ b/drivers/spi/spi-mem.c +@@ -178,6 +178,11 @@ bool spi_mem_default_supports_op(struct spi_mem *mem, + return false; + } + ++ if (op->data.ecc) { ++ if (!spi_mem_controller_is_capable(ctlr, ecc)) ++ return false; ++ } ++ + return spi_mem_check_buswidth(mem, op); + } + EXPORT_SYMBOL_GPL(spi_mem_default_supports_op); +diff --git a/include/linux/spi/spi-mem.h b/include/linux/spi/spi-mem.h +index 4a1bfe689872..2ba044d0d5e5 100644 +--- a/include/linux/spi/spi-mem.h ++++ b/include/linux/spi/spi-mem.h +@@ -89,6 +89,7 @@ enum spi_mem_data_dir { + * @dummy.dtr: whether the dummy bytes should be sent in DTR mode or not + * @data.buswidth: number of IO lanes used to send/receive the data + * @data.dtr: whether the data should be sent in DTR mode or not ++ * @data.ecc: whether error correction is required or not + * @data.dir: direction of the transfer + * @data.nbytes: number of data bytes to send/receive. Can be zero if the + * operation does not involve transferring data +@@ -119,6 +120,7 @@ struct spi_mem_op { + struct { + u8 buswidth; + u8 dtr : 1; ++ u8 ecc : 1; + enum spi_mem_data_dir dir; + unsigned int nbytes; + union { +@@ -288,9 +290,11 @@ struct spi_controller_mem_ops { + /** + * struct spi_controller_mem_caps - SPI memory controller capabilities + * @dtr: Supports DTR operations ++ * @ecc: Supports operations with error correction + */ + struct spi_controller_mem_caps { + bool dtr; ++ bool ecc; + }; + + #define spi_mem_controller_is_capable(ctlr, cap) \ +-- +2.35.1 + diff --git a/target/linux/mediatek/patches-5.15/120-08-v5.18-mtd-spinand-Delay-a-little-bit-the-dirmap-creation.patch b/target/linux/mediatek/patches-5.15/120-08-v5.18-mtd-spinand-Delay-a-little-bit-the-dirmap-creation.patch new file mode 100644 index 0000000000..d8c0e1bcd8 --- /dev/null +++ b/target/linux/mediatek/patches-5.15/120-08-v5.18-mtd-spinand-Delay-a-little-bit-the-dirmap-creation.patch @@ -0,0 +1,55 @@ +From 94ef3c35b935a63f6c156957c92f6cf33c9a8dae Mon Sep 17 00:00:00 2001 +From: Miquel Raynal +Date: Thu, 27 Jan 2022 10:18:02 +0100 +Subject: [PATCH 08/15] mtd: spinand: Delay a little bit the dirmap creation + +As we will soon tweak the dirmap creation to act a little bit +differently depending on the picked ECC engine, we need to initialize +dirmaps after ECC engines. This should not have any effect as dirmaps +are not yet used at this point. + +Signed-off-by: Miquel Raynal +Reviewed-by: Boris Brezillon +Link: https://lore.kernel.org/linux-mtd/20220127091808.1043392-8-miquel.raynal@bootlin.com +(cherry picked from commit dc4c2cbf0be2d4a8e2a65013ea2815bb2c8ba949) +--- + drivers/mtd/nand/spi/core.c | 16 ++++++++-------- + 1 file changed, 8 insertions(+), 8 deletions(-) + +diff --git a/drivers/mtd/nand/spi/core.c b/drivers/mtd/nand/spi/core.c +index 2c8685f1f2fa..bb6b026b558b 100644 +--- a/drivers/mtd/nand/spi/core.c ++++ b/drivers/mtd/nand/spi/core.c +@@ -1208,14 +1208,6 @@ static int spinand_init(struct spinand_device *spinand) + if (ret) + goto err_free_bufs; + +- ret = spinand_create_dirmaps(spinand); +- if (ret) { +- dev_err(dev, +- "Failed to create direct mappings for read/write operations (err = %d)\n", +- ret); +- goto err_manuf_cleanup; +- } +- + ret = nanddev_init(nand, &spinand_ops, THIS_MODULE); + if (ret) + goto err_manuf_cleanup; +@@ -1250,6 +1242,14 @@ static int spinand_init(struct spinand_device *spinand) + mtd->ecc_strength = nanddev_get_ecc_conf(nand)->strength; + mtd->ecc_step_size = nanddev_get_ecc_conf(nand)->step_size; + ++ ret = spinand_create_dirmaps(spinand); ++ if (ret) { ++ dev_err(dev, ++ "Failed to create direct mappings for read/write operations (err = %d)\n", ++ ret); ++ goto err_cleanup_ecc_engine; ++ } ++ + return 0; + + err_cleanup_ecc_engine: +-- +2.35.1 + diff --git a/target/linux/mediatek/patches-5.15/120-09-v5.18-mtd-spinand-Create-direct-mapping-descriptors-for-EC.patch b/target/linux/mediatek/patches-5.15/120-09-v5.18-mtd-spinand-Create-direct-mapping-descriptors-for-EC.patch new file mode 100644 index 0000000000..ee3a6d384f --- /dev/null +++ b/target/linux/mediatek/patches-5.15/120-09-v5.18-mtd-spinand-Create-direct-mapping-descriptors-for-EC.patch @@ -0,0 +1,105 @@ +From eb4a2d282c3c5752211d69be6dff2674119e5583 Mon Sep 17 00:00:00 2001 +From: Miquel Raynal +Date: Thu, 27 Jan 2022 10:18:03 +0100 +Subject: [PATCH 09/15] mtd: spinand: Create direct mapping descriptors for ECC + operations + +In order for pipelined ECC engines to be able to enable/disable the ECC +engine only when needed and avoid races when future parallel-operations +will be supported, we need to provide the information about the use of +the ECC engine in the direct mapping hooks. As direct mapping +configurations are meant to be static, it is best to create two new +mappings: one for regular 'raw' accesses and one for accesses involving +correction. It is up to the driver to use or not the new ECC enable +boolean contained in the spi-mem operation. + +As dirmaps are not free (they consume a few pages of MMIO address space) +and because these extra entries are only meant to be used by pipelined +engines, let's limit their use to this specific type of engine and save +a bit of memory with all the other setups. + +Signed-off-by: Miquel Raynal +Reviewed-by: Boris Brezillon +Link: https://lore.kernel.org/linux-mtd/20220127091808.1043392-9-miquel.raynal@bootlin.com +(cherry picked from commit f9d7c7265bcff7d9a17425a8cddf702e8fe159c2) +--- + drivers/mtd/nand/spi/core.c | 35 +++++++++++++++++++++++++++++++++-- + include/linux/mtd/spinand.h | 2 ++ + 2 files changed, 35 insertions(+), 2 deletions(-) + +diff --git a/drivers/mtd/nand/spi/core.c b/drivers/mtd/nand/spi/core.c +index bb6b026b558b..ff8336870bc0 100644 +--- a/drivers/mtd/nand/spi/core.c ++++ b/drivers/mtd/nand/spi/core.c +@@ -381,7 +381,10 @@ static int spinand_read_from_cache_op(struct spinand_device *spinand, + } + } + +- rdesc = spinand->dirmaps[req->pos.plane].rdesc; ++ if (req->mode == MTD_OPS_RAW) ++ rdesc = spinand->dirmaps[req->pos.plane].rdesc; ++ else ++ rdesc = spinand->dirmaps[req->pos.plane].rdesc_ecc; + + while (nbytes) { + ret = spi_mem_dirmap_read(rdesc, column, nbytes, buf); +@@ -452,7 +455,10 @@ static int spinand_write_to_cache_op(struct spinand_device *spinand, + req->ooblen); + } + +- wdesc = spinand->dirmaps[req->pos.plane].wdesc; ++ if (req->mode == MTD_OPS_RAW) ++ wdesc = spinand->dirmaps[req->pos.plane].wdesc; ++ else ++ wdesc = spinand->dirmaps[req->pos.plane].wdesc_ecc; + + while (nbytes) { + ret = spi_mem_dirmap_write(wdesc, column, nbytes, buf); +@@ -865,6 +871,31 @@ static int spinand_create_dirmap(struct spinand_device *spinand, + + spinand->dirmaps[plane].rdesc = desc; + ++ if (nand->ecc.engine->integration != NAND_ECC_ENGINE_INTEGRATION_PIPELINED) { ++ spinand->dirmaps[plane].wdesc_ecc = spinand->dirmaps[plane].wdesc; ++ spinand->dirmaps[plane].rdesc_ecc = spinand->dirmaps[plane].rdesc; ++ ++ return 0; ++ } ++ ++ info.op_tmpl = *spinand->op_templates.update_cache; ++ info.op_tmpl.data.ecc = true; ++ desc = devm_spi_mem_dirmap_create(&spinand->spimem->spi->dev, ++ spinand->spimem, &info); ++ if (IS_ERR(desc)) ++ return PTR_ERR(desc); ++ ++ spinand->dirmaps[plane].wdesc_ecc = desc; ++ ++ info.op_tmpl = *spinand->op_templates.read_cache; ++ info.op_tmpl.data.ecc = true; ++ desc = devm_spi_mem_dirmap_create(&spinand->spimem->spi->dev, ++ spinand->spimem, &info); ++ if (IS_ERR(desc)) ++ return PTR_ERR(desc); ++ ++ spinand->dirmaps[plane].rdesc_ecc = desc; ++ + return 0; + } + +diff --git a/include/linux/mtd/spinand.h b/include/linux/mtd/spinand.h +index 6988956b8492..3aa28240a77f 100644 +--- a/include/linux/mtd/spinand.h ++++ b/include/linux/mtd/spinand.h +@@ -389,6 +389,8 @@ struct spinand_info { + struct spinand_dirmap { + struct spi_mem_dirmap_desc *wdesc; + struct spi_mem_dirmap_desc *rdesc; ++ struct spi_mem_dirmap_desc *wdesc_ecc; ++ struct spi_mem_dirmap_desc *rdesc_ecc; + }; + + /** +-- +2.35.1 + diff --git a/target/linux/mediatek/patches-5.15/120-10-v5.18-mtd-nand-fix-ecc-parameters-for-mt7622.patch b/target/linux/mediatek/patches-5.15/120-10-v5.18-mtd-nand-fix-ecc-parameters-for-mt7622.patch new file mode 100644 index 0000000000..7dbcf2fcda --- /dev/null +++ b/target/linux/mediatek/patches-5.15/120-10-v5.18-mtd-nand-fix-ecc-parameters-for-mt7622.patch @@ -0,0 +1,93 @@ +From 41825166744c6e5664281611f5e6d9a2e9333c2b Mon Sep 17 00:00:00 2001 +From: Chuanhong Guo +Date: Sat, 2 Apr 2022 22:31:20 +0800 +Subject: [PATCH 10/15] mtd: nand: fix ecc parameters for mt7622 + +According to the datasheet, mt7622 only has 5 ECC capabilities instead +of 7, and the decoding error register is arranged as follows: ++------+---------+---------+---------+---------+ +| Bits | 19:15 | 14:10 | 9:5 | 4:0 | ++------+---------+---------+---------+---------+ +| Name | ERRNUM3 | ERRNUM2 | ERRNUM1 | ERRNUM0 | ++------+---------+---------+---------+---------+ +This means err_mask should be 0x1f instead of 0x3f and the number of +bits shifted in mtk_ecc_get_stats should be 5 instead of 8. + +This commit introduces err_shift for the difference in this register +and fix other existing parameters. + +Public MT7622 reference manual can be found on [0] and the info this +commit is based on is from page 656 and page 660. + +[0]: https://wiki.banana-pi.org/Banana_Pi_BPI-R64#Documents + +Fixes: 98dea8d71931 ("mtd: nand: mtk: Support MT7622 NAND flash controller.") +Signed-off-by: Chuanhong Guo +(cherry picked from commit 088b769abd1bd21753002b17b696ae1778b16e8c) +--- + drivers/mtd/nand/raw/mtk_ecc.c | 12 ++++++++---- + 1 file changed, 8 insertions(+), 4 deletions(-) + +diff --git a/drivers/mtd/nand/raw/mtk_ecc.c b/drivers/mtd/nand/raw/mtk_ecc.c +index c437d97debb8..ec9d1fb07006 100644 +--- a/drivers/mtd/nand/raw/mtk_ecc.c ++++ b/drivers/mtd/nand/raw/mtk_ecc.c +@@ -43,6 +43,7 @@ + + struct mtk_ecc_caps { + u32 err_mask; ++ u32 err_shift; + const u8 *ecc_strength; + const u32 *ecc_regs; + u8 num_ecc_strength; +@@ -76,7 +77,7 @@ static const u8 ecc_strength_mt2712[] = { + }; + + static const u8 ecc_strength_mt7622[] = { +- 4, 6, 8, 10, 12, 14, 16 ++ 4, 6, 8, 10, 12 + }; + + enum mtk_ecc_regs { +@@ -221,7 +222,7 @@ void mtk_ecc_get_stats(struct mtk_ecc *ecc, struct mtk_ecc_stats *stats, + for (i = 0; i < sectors; i++) { + offset = (i >> 2) << 2; + err = readl(ecc->regs + ECC_DECENUM0 + offset); +- err = err >> ((i % 4) * 8); ++ err = err >> ((i % 4) * ecc->caps->err_shift); + err &= ecc->caps->err_mask; + if (err == ecc->caps->err_mask) { + /* uncorrectable errors */ +@@ -449,6 +450,7 @@ EXPORT_SYMBOL(mtk_ecc_get_parity_bits); + + static const struct mtk_ecc_caps mtk_ecc_caps_mt2701 = { + .err_mask = 0x3f, ++ .err_shift = 8, + .ecc_strength = ecc_strength_mt2701, + .ecc_regs = mt2701_ecc_regs, + .num_ecc_strength = 20, +@@ -459,6 +461,7 @@ static const struct mtk_ecc_caps mtk_ecc_caps_mt2701 = { + + static const struct mtk_ecc_caps mtk_ecc_caps_mt2712 = { + .err_mask = 0x7f, ++ .err_shift = 8, + .ecc_strength = ecc_strength_mt2712, + .ecc_regs = mt2712_ecc_regs, + .num_ecc_strength = 23, +@@ -468,10 +471,11 @@ static const struct mtk_ecc_caps mtk_ecc_caps_mt2712 = { + }; + + static const struct mtk_ecc_caps mtk_ecc_caps_mt7622 = { +- .err_mask = 0x3f, ++ .err_mask = 0x1f, ++ .err_shift = 5, + .ecc_strength = ecc_strength_mt7622, + .ecc_regs = mt7622_ecc_regs, +- .num_ecc_strength = 7, ++ .num_ecc_strength = 5, + .ecc_mode_shift = 4, + .parity_bits = 13, + .pg_irq_sel = 0, +-- +2.35.1 +