From: "Alastair D'Silva" <alastair@au1.ibm.com> To: alastair@d-silva.org Cc: "Benjamin Herrenschmidt" <benh@kernel.crashing.org>, "Paul Mackerras" <paulus@samba.org>, "Michael Ellerman" <mpe@ellerman.id.au>, "Frederic Barrat" <fbarrat@linux.ibm.com>, "Andrew Donnellan" <ajd@linux.ibm.com>, "Arnd Bergmann" <arnd@arndb.de>, "Greg Kroah-Hartman" <gregkh@linuxfoundation.org>, "Andrew Morton" <akpm@linux-foundation.org>, "Mauro Carvalho Chehab" <mchehab+samsung@kernel.org>, "David S. Miller" <davem@davemloft.net>, "Rob Herring" <robh@kernel.org>, "Anton Blanchard" <anton@ozlabs.org>, "Krzysztof Kozlowski" <krzk@kernel.org>, "Mahesh Salgaonkar" <mahesh@linux.vnet.ibm.com>, "Madhavan Srinivasan" <maddy@linux.vnet.ibm.com>, "Cédric Le Goater" <clg@kaod.org>, "Anju T Sudhakar" <anju@linux.vnet.ibm.com>, "Hari Bathini" <hbathini@linux.ibm.com>, "Thomas Gleixner" <tglx@linutronix.de>, "Greg Kurz" <groug@kaod.org>, "Nicholas Piggin" <npiggin@gmail.com>, "Masahiro Yamada" <yamada.masahiro@socionext.com>, "Alexey Kardashevskiy" <aik@ozlabs.ru>, linux-kernel@vger.kernel.org, linuxppc-dev@list Subject: [PATCH v2 10/27] nvdimm: Add driver for OpenCAPI Storage Class Memory Date: Tue, 3 Dec 2019 14:46:38 +1100 Message-ID: <20191203034655.51561-11-alastair@au1.ibm.com> (raw) In-Reply-To: <20191203034655.51561-1-alastair@au1.ibm.com> From: Alastair D'Silva <alastair@d-silva.org> This driver exposes LPC memory on OpenCAPI SCM cards as an NVDIMM, allowing the existing nvram infrastructure to be used. Namespace metadata is stored on the media itself, so scm_reserve_metadata() maps 1 section's worth of PMEM storage at the start to hold this. The rest of the PMEM range is registered with libnvdimm as an nvdimm. scm_ndctl_config_read/write/size() provide callbacks to libnvdimm to access the metadata. Signed-off-by: Alastair D'Silva <alastair@d-silva.org> --- drivers/nvdimm/Kconfig | 2 + drivers/nvdimm/Makefile | 2 +- drivers/nvdimm/ocxl/Kconfig | 15 + drivers/nvdimm/ocxl/Makefile | 7 + drivers/nvdimm/ocxl/scm.c | 519 +++++++++++++++++++++++++++++ drivers/nvdimm/ocxl/scm_internal.h | 28 ++ 6 files changed, 572 insertions(+), 1 deletion(-) create mode 100644 drivers/nvdimm/ocxl/Kconfig create mode 100644 drivers/nvdimm/ocxl/Makefile create mode 100644 drivers/nvdimm/ocxl/scm.c create mode 100644 drivers/nvdimm/ocxl/scm_internal.h diff --git a/drivers/nvdimm/Kconfig b/drivers/nvdimm/Kconfig index 36af7af6b7cf..d1bab36da61c 100644 --- a/drivers/nvdimm/Kconfig +++ b/drivers/nvdimm/Kconfig @@ -130,4 +130,6 @@ config NVDIMM_TEST_BUILD core devm_memremap_pages() implementation and other infrastructure. +source "drivers/nvdimm/ocxl/Kconfig" + endif diff --git a/drivers/nvdimm/Makefile b/drivers/nvdimm/Makefile index 29203f3d3069..e33492128042 100644 --- a/drivers/nvdimm/Makefile +++ b/drivers/nvdimm/Makefile @@ -1,5 +1,5 @@ # SPDX-License-Identifier: GPL-2.0 -obj-$(CONFIG_LIBNVDIMM) += libnvdimm.o +obj-$(CONFIG_LIBNVDIMM) += libnvdimm.o ocxl/ obj-$(CONFIG_BLK_DEV_PMEM) += nd_pmem.o obj-$(CONFIG_ND_BTT) += nd_btt.o obj-$(CONFIG_ND_BLK) += nd_blk.o diff --git a/drivers/nvdimm/ocxl/Kconfig b/drivers/nvdimm/ocxl/Kconfig new file mode 100644 index 000000000000..24099b300f5e --- /dev/null +++ b/drivers/nvdimm/ocxl/Kconfig @@ -0,0 +1,15 @@ +# SPDX-License-Identifier: GPL-2.0-only +if LIBNVDIMM + +config OCXL_SCM + tristate "OpenCAPI Storage Class Memory" + depends on LIBNVDIMM && PPC_POWERNV && PCI && EEH + select ZONE_DEVICE + select OCXL + help + Exposes devices that implement the OpenCAPI Storage Class Memory + specification as persistent memory regions. + + Select N if unsure. + +endif diff --git a/drivers/nvdimm/ocxl/Makefile b/drivers/nvdimm/ocxl/Makefile new file mode 100644 index 000000000000..74a1bd98848e --- /dev/null +++ b/drivers/nvdimm/ocxl/Makefile @@ -0,0 +1,7 @@ +# SPDX-License-Identifier: GPL-2.0 + +ccflags-$(CONFIG_PPC_WERROR) += -Werror + +obj-$(CONFIG_OCXL_SCM) += ocxlscm.o + +ocxlscm-y := scm.o diff --git a/drivers/nvdimm/ocxl/scm.c b/drivers/nvdimm/ocxl/scm.c new file mode 100644 index 000000000000..571058a9e7b8 --- /dev/null +++ b/drivers/nvdimm/ocxl/scm.c @@ -0,0 +1,519 @@ +// SPDX-License-Identifier: GPL-2.0+ +// Copyright 2019 IBM Corp. + +/* + * A driver for Storage Class Memory, connected via OpenCAPI + */ + +#include <linux/module.h> +#include <misc/ocxl.h> +#include <linux/ndctl.h> +#include <linux/mm_types.h> +#include <linux/memory_hotplug.h> +#include "scm_internal.h" + + +static const struct pci_device_id scm_pci_tbl[] = { + { PCI_DEVICE(PCI_VENDOR_ID_IBM, 0x0625), }, + { } +}; + +MODULE_DEVICE_TABLE(pci, scm_pci_tbl); + +#define SCM_NUM_MINORS 256 // Total to reserve + +static dev_t scm_dev; +static struct class *scm_class; +static struct mutex minors_idr_lock; +static struct idr minors_idr; + +static const struct attribute_group *scm_pmem_attribute_groups[] = { + &nvdimm_bus_attribute_group, + NULL, +}; + +static const struct attribute_group *scm_pmem_region_attribute_groups[] = { + &nd_region_attribute_group, + &nd_device_attribute_group, + &nd_mapping_attribute_group, + &nd_numa_attribute_group, + NULL, +}; + +/** + * scm_ndctl_config_write() - Handle a ND_CMD_SET_CONFIG_DATA command from ndctl + * @scm_data: the SCM metadata + * @command: the incoming data to write + * Return: 0 on success, negative on failure + */ +static int scm_ndctl_config_write(struct scm_data *scm_data, + struct nd_cmd_set_config_hdr *command) +{ + if (command->in_offset + command->in_length > SCM_LABEL_AREA_SIZE) + return -EINVAL; + + memcpy_flushcache(scm_data->metadata_addr + command->in_offset, command->in_buf, + command->in_length); + + return 0; +} + +/** + * scm_ndctl_config_read() - Handle a ND_CMD_GET_CONFIG_DATA command from ndctl + * @scm_data: the SCM metadata + * @command: the read request + * Return: 0 on success, negative on failure + */ +static int scm_ndctl_config_read(struct scm_data *scm_data, + struct nd_cmd_get_config_data_hdr *command) +{ + if (command->in_offset + command->in_length > SCM_LABEL_AREA_SIZE) + return -EINVAL; + + memcpy_mcsafe(command->out_buf, scm_data->metadata_addr + command->in_offset, + command->in_length); + + return 0; +} + +/** + * scm_ndctl_config_size() - Handle a ND_CMD_GET_CONFIG_SIZE command from ndctl + * @scm_data: the SCM metadata + * @command: the read request + * Return: 0 on success, negative on failure + */ +static int scm_ndctl_config_size(struct nd_cmd_get_config_size *command) +{ + command->status = 0; + command->config_size = SCM_LABEL_AREA_SIZE; + command->max_xfer = PAGE_SIZE; + + return 0; +} + +static int scm_ndctl(struct nvdimm_bus_descriptor *nd_desc, + struct nvdimm *nvdimm, + unsigned int cmd, void *buf, unsigned int buf_len, int *cmd_rc) +{ + struct scm_data *scm_data = container_of(nd_desc, struct scm_data, bus_desc); + + switch (cmd) { + case ND_CMD_GET_CONFIG_SIZE: + *cmd_rc = scm_ndctl_config_size(buf); + return 0; + + case ND_CMD_GET_CONFIG_DATA: + *cmd_rc = scm_ndctl_config_read(scm_data, buf); + return 0; + + case ND_CMD_SET_CONFIG_DATA: + *cmd_rc = scm_ndctl_config_write(scm_data, buf); + return 0; + + default: + return -ENOTTY; + } +} + +static ssize_t serial_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct nvdimm *nvdimm = to_nvdimm(dev); + struct scm_data *scm_data = nvdimm_provider_data(nvdimm); + const struct ocxl_fn_config *config = ocxl_function_config(scm_data->ocxl_fn); + + return sprintf(buf, "0x%llx\n", config->serial); +} +static DEVICE_ATTR_RO(serial); + +static struct attribute *scm_dimm_attributes[] = { + &dev_attr_serial.attr, + NULL, +}; + +static umode_t scm_dimm_attr_visible(struct kobject *kobj, + struct attribute *a, int n) +{ + return a->mode; +} + +static const struct attribute_group scm_dimm_attribute_group = { + .name = "ocxl", + .attrs = scm_dimm_attributes, + .is_visible = scm_dimm_attr_visible, +}; + +static const struct attribute_group *scm_dimm_attribute_groups[] = { + &nvdimm_attribute_group, + &nd_device_attribute_group, + &scm_dimm_attribute_group, + NULL, +}; + +/** + * scm_reserve_metadata() - Reserve space for nvdimm metadata + * @scm_data: The SCM device data + * @lpc_mem: The resource representing the LPC memory of the SCM device + */ +static int scm_reserve_metadata(struct scm_data *scm_data, + struct resource *lpc_mem) +{ + scm_data->metadata_addr = devm_memremap(&scm_data->dev, lpc_mem->start, + SCM_LABEL_AREA_SIZE, MEMREMAP_WB); + if (IS_ERR(scm_data->metadata_addr)) + return PTR_ERR(scm_data->metadata_addr); + + return 0; +} + +/** + * scm_register_lpc_mem() - Discover persistent memory on a device and register it with the NVDIMM subsystem + * @scm_data: The SCM device data + * Return: 0 on success + */ +static int scm_register_lpc_mem(struct scm_data *scm_data) +{ + struct nd_region_desc region_desc; + struct nd_mapping_desc nd_mapping_desc; + struct resource *lpc_mem; + const struct ocxl_afu_config *config; + const struct ocxl_fn_config *fn_config; + int rc; + unsigned long nvdimm_cmd_mask = 0; + unsigned long nvdimm_flags = 0; + int target_node; + char serial[16+1]; + + // Set up the reserved metadata area + rc = ocxl_afu_map_lpc_mem(scm_data->ocxl_afu); + if (rc < 0) + return rc; + + lpc_mem = ocxl_afu_lpc_mem(scm_data->ocxl_afu); + if (lpc_mem == NULL || lpc_mem->start == 0) + return -EINVAL; + + config = ocxl_afu_config(scm_data->ocxl_afu); + fn_config = ocxl_function_config(scm_data->ocxl_fn); + + rc = scm_reserve_metadata(scm_data, lpc_mem); + if (rc) + return rc; + + scm_data->bus_desc.attr_groups = scm_pmem_attribute_groups; + scm_data->bus_desc.provider_name = "ocxl-scm"; + scm_data->bus_desc.ndctl = scm_ndctl; + scm_data->bus_desc.module = THIS_MODULE; + + scm_data->nvdimm_bus = nvdimm_bus_register(&scm_data->dev, + &scm_data->bus_desc); + if (!scm_data->nvdimm_bus) + return -EINVAL; + + scm_data->scm_res.start = (u64)lpc_mem->start + SCM_LABEL_AREA_SIZE; + scm_data->scm_res.end = (u64)lpc_mem->start + config->lpc_mem_size - 1; + scm_data->scm_res.name = "SCM persistent memory"; + + set_bit(ND_CMD_GET_CONFIG_SIZE, &nvdimm_cmd_mask); + set_bit(ND_CMD_GET_CONFIG_DATA, &nvdimm_cmd_mask); + set_bit(ND_CMD_SET_CONFIG_DATA, &nvdimm_cmd_mask); + + set_bit(NDD_ALIASING, &nvdimm_flags); + + snprintf(serial, sizeof(serial), "%llx", fn_config->serial); + nd_mapping_desc.nvdimm = nvdimm_create(scm_data->nvdimm_bus, scm_data, + scm_dimm_attribute_groups, + nvdimm_flags, nvdimm_cmd_mask, + 0, NULL); + if (!nd_mapping_desc.nvdimm) + return -ENOMEM; + + if (nvdimm_bus_check_dimm_count(scm_data->nvdimm_bus, 1)) + return -EINVAL; + + nd_mapping_desc.start = scm_data->scm_res.start; + nd_mapping_desc.size = resource_size(&scm_data->scm_res); + nd_mapping_desc.position = 0; + + scm_data->nd_set.cookie1 = fn_config->serial + 1; // allow for empty serial + scm_data->nd_set.cookie2 = fn_config->serial + 1; + + target_node = of_node_to_nid(scm_data->pdev->dev.of_node); + + memset(®ion_desc, 0, sizeof(region_desc)); + region_desc.res = &scm_data->scm_res; + region_desc.attr_groups = scm_pmem_region_attribute_groups; + region_desc.numa_node = NUMA_NO_NODE; + region_desc.target_node = target_node; + region_desc.num_mappings = 1; + region_desc.mapping = &nd_mapping_desc; + region_desc.nd_set = &scm_data->nd_set; + + set_bit(ND_REGION_PAGEMAP, ®ion_desc.flags); + /* + * NB: libnvdimm copies the data from ndr_desc into it's own + * structures so passing a stack pointer is fine. + */ + scm_data->nd_region = nvdimm_pmem_region_create(scm_data->nvdimm_bus, + ®ion_desc); + if (!scm_data->nd_region) + return -EINVAL; + + dev_info(&scm_data->dev, + "Onlining %lluMB of persistent memory\n", + nd_mapping_desc.size / SZ_1M); + + return 0; +} + +/** + * allocate_scm_minor() - Allocate a minor number to use for an SCM device + * @scm_data: The SCM device to associate the minor with + * Return: the allocated minor number + */ +static int allocate_scm_minor(struct scm_data *scm_data) +{ + int minor; + + mutex_lock(&minors_idr_lock); + minor = idr_alloc(&minors_idr, scm_data, 0, SCM_NUM_MINORS, GFP_KERNEL); + mutex_unlock(&minors_idr_lock); + return minor; +} + +static void free_scm_minor(struct scm_data *scm_data) +{ + mutex_lock(&minors_idr_lock); + idr_remove(&minors_idr, MINOR(scm_data->dev.devt)); + mutex_unlock(&minors_idr_lock); +} + +/** + * free_scm() - Free all members of an SCM struct + * @scm_data: the SCM metadata to clear + */ +static void free_scm(struct scm_data *scm_data) +{ + int rc; + + if (scm_data->nvdimm_bus) + nvdimm_bus_unregister(scm_data->nvdimm_bus); + + free_scm_minor(scm_data); + + if (scm_data->metadata_addr) + devm_memunmap(&scm_data->dev, scm_data->metadata_addr); + + if (scm_data->ocxl_context) { + rc = ocxl_context_detach(scm_data->ocxl_context); + if (rc == -EBUSY) + dev_warn(&scm_data->dev, "Timeout detaching ocxl context\n"); + else + ocxl_context_free(scm_data->ocxl_context); + + } + + if (scm_data->ocxl_afu) + ocxl_afu_put(scm_data->ocxl_afu); + + if (scm_data->ocxl_fn) + ocxl_function_close(scm_data->ocxl_fn); + + kfree(scm_data); +} + +/** + * free_scm_dev - Free an SCM device + * @dev: The device struct + */ +static void free_scm_dev(struct device *dev) +{ + struct scm_data *scm_data = container_of(dev, struct scm_data, dev); + + free_scm(scm_data); +} + +/** + * scm_register - Register an SCM device with the kernel + * @scm_data: the SCM metadata + * Return: 0 on success, negative on failure + */ +static int scm_register(struct scm_data *scm_data) +{ + int rc; + int minor = allocate_scm_minor(scm_data); + + if (minor < 0) + return minor; + + scm_data->dev.release = free_scm_dev; + rc = dev_set_name(&scm_data->dev, "ocxl-scm%d", minor); + if (rc < 0) + return rc; + + scm_data->dev.devt = MKDEV(MAJOR(scm_dev), minor); + scm_data->dev.class = scm_class; + scm_data->dev.parent = &scm_data->pdev->dev; + + rc = device_register(&scm_data->dev); + return rc; +} + +/** + * scm_remove() - Free an OpenCAPI Storage Class Memory device + * @pdev: the PCI device information struct + */ +static void scm_remove(struct pci_dev *pdev) +{ + if (PCI_FUNC(pdev->devfn) == 0) { + struct scm_function_0 *scm_func_0 = pci_get_drvdata(pdev); + + if (scm_func_0) { + ocxl_function_close(scm_func_0->ocxl_fn); + scm_func_0->ocxl_fn = NULL; + } + } else { + struct scm_data *scm_data = pci_get_drvdata(pdev); + + if (scm_data) + device_unregister(&scm_data->dev); + } +} + +/** + * scm_probe_function_0 - Set up function 0 for an OpenCAPI Storage Class Memory device + * This is important as it enables templates higher than 0 across all other functions, + * which in turn enables higher bandwidth accesses + * which in turn enables higher bandwidth accesses + * @pdev: the PCI device information struct + * Return: 0 on success, negative on failure + */ +static int scm_probe_function_0(struct pci_dev *pdev) +{ + struct scm_function_0 *scm_func_0 = NULL; + struct ocxl_fn *fn; + + scm_func_0 = kzalloc(sizeof(*scm_func_0), GFP_KERNEL); + if (!scm_func_0) + return -ENOMEM; + + scm_func_0->pdev = pdev; + fn = ocxl_function_open(pdev); + if (IS_ERR(fn)) { + kfree(scm_func_0); + dev_err(&pdev->dev, "failed to open OCXL function\n"); + return PTR_ERR(fn); + } + scm_func_0->ocxl_fn = fn; + + pci_set_drvdata(pdev, scm_func_0); + + return 0; +} + +/** + * scm_probe - Init an OpenCAPI Storage Class Memory device + * @pdev: the PCI device information struct + * @ent: The entry from scm_pci_tbl + * Return: 0 on success, negative on failure + */ +static int scm_probe(struct pci_dev *pdev, const struct pci_device_id *ent) +{ + struct scm_data *scm_data = NULL; + + if (PCI_FUNC(pdev->devfn) == 0) + return scm_probe_function_0(pdev); + else if (PCI_FUNC(pdev->devfn) != 1) + return 0; + + scm_data = kzalloc(sizeof(*scm_data), GFP_KERNEL); + if (!scm_data) { + dev_err(&pdev->dev, "Could not allocate SCM metadata\n"); + goto err; + } + scm_data->pdev = pdev; + + pci_set_drvdata(pdev, scm_data); + + scm_data->ocxl_fn = ocxl_function_open(pdev); + if (IS_ERR(scm_data->ocxl_fn)) { + kfree(scm_data); + scm_data = NULL; + pci_set_drvdata(pdev, NULL); + dev_err(&pdev->dev, "failed to open OCXL function\n"); + goto err; + } + + scm_data->ocxl_afu = ocxl_function_fetch_afu(scm_data->ocxl_fn, 0); + if (scm_data->ocxl_afu == NULL) { + dev_err(&pdev->dev, "Could not get OCXL AFU from function\n"); + goto err; + } + + ocxl_afu_get(scm_data->ocxl_afu); + + if (scm_register(scm_data) < 0) { + dev_err(&pdev->dev, "Could not register SCM device with the kernel\n"); + goto err; + } + + // Resources allocated below here are cleaned up in the release handler + + if (ocxl_context_alloc(&scm_data->ocxl_context, scm_data->ocxl_afu, NULL)) { + dev_err(&pdev->dev, "Could not allocate OCXL context\n"); + goto err; + } + + if (ocxl_context_attach(scm_data->ocxl_context, 0, NULL)) { + dev_err(&pdev->dev, "Could not attach ocxl context\n"); + goto err; + } + + if (scm_register_lpc_mem(scm_data)) { + dev_err(&pdev->dev, "Could not register OCXL SCM memory with libnvdimm\n"); + goto err; + } + + return 0; + +err: + /* + * Further cleanup is done in the release handler via free_scm() + * This allows us to keep the character device live to handle IOCTLs to + * investigate issues if the card has an error + */ + + dev_err(&pdev->dev, + "Error detected, will not register storage class memory\n"); + return -ENXIO; +} + +static struct pci_driver scm_pci_driver = { + .name = "ocxl-scm", + .id_table = scm_pci_tbl, + .probe = scm_probe, + .remove = scm_remove, + .shutdown = scm_remove, +}; + +static int __init scm_init(void) +{ + int rc = 0; + + rc = pci_register_driver(&scm_pci_driver); + if (rc) + return rc; + + return 0; +} + +static void scm_exit(void) +{ + pci_unregister_driver(&scm_pci_driver); +} + +module_init(scm_init); +module_exit(scm_exit); + +MODULE_DESCRIPTION("Storage Class Memory"); +MODULE_LICENSE("GPL"); diff --git a/drivers/nvdimm/ocxl/scm_internal.h b/drivers/nvdimm/ocxl/scm_internal.h new file mode 100644 index 000000000000..6340012e0f8a --- /dev/null +++ b/drivers/nvdimm/ocxl/scm_internal.h @@ -0,0 +1,28 @@ +// SPDX-License-Identifier: GPL-2.0+ +// Copyright 2019 IBM Corp. + +#include <linux/pci.h> +#include <misc/ocxl.h> +#include <linux/libnvdimm.h> +#include <linux/mm.h> + +#define SCM_LABEL_AREA_SIZE (1UL << PA_SECTION_SHIFT) + +struct scm_function_0 { + struct pci_dev *pdev; + struct ocxl_fn *ocxl_fn; +}; + +struct scm_data { + struct device dev; + struct pci_dev *pdev; + struct ocxl_fn *ocxl_fn; + struct nd_interleave_set nd_set; + struct nvdimm_bus_descriptor bus_desc; + struct nvdimm_bus *nvdimm_bus; + struct ocxl_afu *ocxl_afu; + struct ocxl_context *ocxl_context; + void *metadata_addr; + struct resource scm_res; + struct nd_region *nd_region; +}; -- 2.23.0 _______________________________________________ Linux-nvdimm mailing list -- linux-nvdimm@lists.01.org To unsubscribe send an email to linux-nvdimm-leave@lists.01.org
next prev parent reply index Thread overview: 67+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-12-03 3:46 [PATCH v2 00/27] Add support for OpenCAPI SCM devices Alastair D'Silva 2019-12-03 3:46 ` [PATCH v2 01/27] memory_hotplug: Add a bounds check to __add_pages Alastair D'Silva 2019-12-03 3:46 ` [PATCH v2 02/27] nvdimm: remove prototypes for nonexistent functions Alastair D'Silva 2019-12-03 4:47 ` Andrew Donnellan 2019-12-04 0:10 ` Dan Williams 2020-01-23 21:49 ` Dan Williams 2019-12-03 3:46 ` [PATCH v2 03/27] powerpc: Add OPAL calls for LPC memory alloc/release Alastair D'Silva 2019-12-03 3:46 ` [PATCH v2 04/27] mm/memory_hotplug: Allow check_hotplug_memory_addressable to be called from drivers Alastair D'Silva 2019-12-03 3:46 ` [PATCH v2 05/27] powerpc: Map & release OpenCAPI LPC memory Alastair D'Silva 2020-01-09 14:41 ` Frederic Barrat 2020-01-21 6:46 ` Andrew Donnellan 2020-01-21 7:11 ` Greg Kurz 2020-02-14 11:09 ` Frederic Barrat 2020-02-18 23:44 ` Alastair D'Silva 2019-12-03 3:46 ` [PATCH v2 06/27] ocxl: Tally up the LPC memory on a link & allow it to be mapped Alastair D'Silva 2020-01-09 14:48 ` Frederic Barrat 2020-02-03 12:37 ` Jonathan Cameron 2020-02-19 0:01 ` Alastair D'Silva 2019-12-03 3:46 ` [PATCH v2 07/27] ocxl: Add functions to map/unmap LPC memory Alastair D'Silva 2020-01-09 14:49 ` Frederic Barrat 2020-02-03 12:49 ` Jonathan Cameron 2020-02-19 2:39 ` Alastair D'Silva 2019-12-03 3:46 ` [PATCH v2 08/27] ocxl: Save the device serial number in ocxl_fn Alastair D'Silva 2020-02-03 12:53 ` Jonathan Cameron 2020-02-19 4:03 ` Alastair D'Silva 2019-12-03 3:46 ` [PATCH v2 09/27] ocxl: Free detached contexts in ocxl_context_detach_all() Alastair D'Silva 2020-01-09 14:54 ` Frederic Barrat 2019-12-03 3:46 ` Alastair D'Silva [this message] 2019-12-03 5:05 ` [PATCH v2 10/27] nvdimm: Add driver for OpenCAPI Storage Class Memory Alastair D'Silva 2020-02-03 13:20 ` Jonathan Cameron 2020-02-19 4:40 ` Alastair D'Silva 2019-12-03 3:46 ` [PATCH v2 11/27] nvdimm/ocxl: Add register addresses & status values to header Alastair D'Silva 2019-12-03 3:46 ` [PATCH v2 12/27] nvdimm/ocxl: Read the capability registers & wait for device ready Alastair D'Silva 2020-02-03 13:23 ` Jonathan Cameron 2020-02-19 4:46 ` Alastair D'Silva 2019-12-03 3:46 ` [PATCH v2 13/27] nvdimm/ocxl: Add support for Admin commands Alastair D'Silva 2020-02-03 14:18 ` Jonathan Cameron 2020-02-19 5:00 ` Alastair D'Silva 2019-12-03 3:46 ` [PATCH v2 14/27] nvdimm/ocxl: Add support for near storage commands Alastair D'Silva 2020-02-03 14:22 ` Jonathan Cameron 2020-02-19 4:54 ` Alastair D'Silva 2019-12-03 3:46 ` [PATCH v2 15/27] nvdimm/ocxl: Register a character device for userspace to interact with Alastair D'Silva 2019-12-03 3:46 ` [PATCH v2 16/27] nvdimm/ocxl: Implement the Read Error Log command Alastair D'Silva 2019-12-05 3:42 ` Alastair D'Silva 2019-12-05 19:34 ` kbuild test robot 2019-12-03 3:46 ` [PATCH v2 17/27] nvdimm/ocxl: Add controller dump IOCTLs Alastair D'Silva 2019-12-03 3:46 ` [PATCH v2 18/27] nvdimm/ocxl: Add an IOCTL to report controller statistics Alastair D'Silva 2019-12-03 3:46 ` [PATCH v2 19/27] nvdimm/ocxl: Forward events to userspace Alastair D'Silva 2019-12-03 3:46 ` [PATCH v2 20/27] nvdimm/ocxl: Add an IOCTL to request controller health & perf data Alastair D'Silva 2019-12-03 3:46 ` [PATCH v2 21/27] nvdimm/ocxl: Support firmware update via sysfs Alastair D'Silva 2019-12-03 3:46 ` [PATCH v2 22/27] nvdimm/ocxl: Implement the heartbeat command Alastair D'Silva 2020-02-03 15:11 ` Jonathan Cameron 2020-02-19 5:02 ` Alastair D'Silva 2019-12-03 3:46 ` [PATCH v2 23/27] nvdimm/ocxl: Add debug IOCTLs Alastair D'Silva 2019-12-03 3:46 ` [PATCH v2 24/27] nvdimm/ocxl: Implement Overwrite Alastair D'Silva 2020-02-03 15:10 ` Jonathan Cameron 2020-02-19 5:13 ` Alastair D'Silva 2019-12-03 3:46 ` [PATCH v2 25/27] nvdimm/ocxl: Expose SMART data via ndctl Alastair D'Silva 2019-12-16 0:15 ` Alastair D'Silva 2019-12-03 3:46 ` [PATCH v2 26/27] powerpc: Enable OpenCAPI Storage Class Memory driver on bare metal Alastair D'Silva 2019-12-03 4:54 ` Andrew Donnellan 2019-12-03 4:57 ` Alastair D'Silva 2019-12-03 3:46 ` [PATCH v2 27/27] MAINTAINERS: Add myself & nvdimm/ocxl to ocxl Alastair D'Silva 2019-12-03 3:50 ` [PATCH v2 00/27] Add support for OpenCAPI SCM devices Matthew Wilcox 2019-12-03 4:01 ` Alastair D'Silva 2019-12-03 12:42 ` Matthew Wilcox 2019-12-04 0:15 ` Dan Williams
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