libnvdimm: control (ioctl) messages for nvdimm_bus and nvdimm devices
Most discovery/configuration of the nvdimm-subsystem is done via sysfs attributes. However, some nvdimm_bus instances, particularly the ACPI.NFIT bus, define a small set of messages that can be passed to the platform. For convenience we derive the initial libnvdimm-ioctl command formats directly from the NFIT DSM Interface Example formats. ND_CMD_SMART: media health and diagnostics ND_CMD_GET_CONFIG_SIZE: size of the label space ND_CMD_GET_CONFIG_DATA: read label space ND_CMD_SET_CONFIG_DATA: write label space ND_CMD_VENDOR: vendor-specific command passthrough ND_CMD_ARS_CAP: report address-range-scrubbing capabilities ND_CMD_ARS_START: initiate scrubbing ND_CMD_ARS_STATUS: report on scrubbing state ND_CMD_SMART_THRESHOLD: configure alarm thresholds for smart events If a platform later defines different commands than this set it is straightforward to extend support to those formats. Most of the commands target a specific dimm. However, the address-range-scrubbing commands target the bus. The 'commands' attribute in sysfs of an nvdimm_bus, or nvdimm, enumerate the supported commands for that object. Cc: <linux-acpi@vger.kernel.org> Cc: Robert Moore <robert.moore@intel.com> Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reported-by: Nicholas Moulin <nicholas.w.moulin@linux.intel.com> Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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62232e45f4
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@ -397,6 +397,18 @@ config ACPI_NFIT
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To compile this driver as a module, choose M here:
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the module will be called nfit.
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config ACPI_NFIT_DEBUG
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bool "NFIT DSM debug"
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depends on ACPI_NFIT
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depends on DYNAMIC_DEBUG
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default n
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help
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Enabling this option causes the nfit driver to dump the
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input and output buffers of _DSM operations on the ACPI0012
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device and its children. This can be very verbose, so leave
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it disabled unless you are debugging a hardware / firmware
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issue.
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source "drivers/acpi/apei/Kconfig"
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config ACPI_EXTLOG
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@ -13,6 +13,7 @@
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#include <linux/list_sort.h>
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#include <linux/libnvdimm.h>
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#include <linux/module.h>
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#include <linux/ndctl.h>
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#include <linux/list.h>
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#include <linux/acpi.h>
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#include "nfit.h"
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@ -24,11 +25,153 @@ static const u8 *to_nfit_uuid(enum nfit_uuids id)
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return nfit_uuid[id];
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}
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static struct acpi_nfit_desc *to_acpi_nfit_desc(
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struct nvdimm_bus_descriptor *nd_desc)
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{
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return container_of(nd_desc, struct acpi_nfit_desc, nd_desc);
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}
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static struct acpi_device *to_acpi_dev(struct acpi_nfit_desc *acpi_desc)
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{
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struct nvdimm_bus_descriptor *nd_desc = &acpi_desc->nd_desc;
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/*
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* If provider == 'ACPI.NFIT' we can assume 'dev' is a struct
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* acpi_device.
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*/
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if (!nd_desc->provider_name
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|| strcmp(nd_desc->provider_name, "ACPI.NFIT") != 0)
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return NULL;
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return to_acpi_device(acpi_desc->dev);
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}
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static int acpi_nfit_ctl(struct nvdimm_bus_descriptor *nd_desc,
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struct nvdimm *nvdimm, unsigned int cmd, void *buf,
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unsigned int buf_len)
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{
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return -ENOTTY;
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struct acpi_nfit_desc *acpi_desc = to_acpi_nfit_desc(nd_desc);
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const struct nd_cmd_desc *desc = NULL;
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union acpi_object in_obj, in_buf, *out_obj;
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struct device *dev = acpi_desc->dev;
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const char *cmd_name, *dimm_name;
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unsigned long dsm_mask;
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acpi_handle handle;
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const u8 *uuid;
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u32 offset;
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int rc, i;
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if (nvdimm) {
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struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
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struct acpi_device *adev = nfit_mem->adev;
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if (!adev)
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return -ENOTTY;
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dimm_name = dev_name(&adev->dev);
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cmd_name = nvdimm_cmd_name(cmd);
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dsm_mask = nfit_mem->dsm_mask;
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desc = nd_cmd_dimm_desc(cmd);
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uuid = to_nfit_uuid(NFIT_DEV_DIMM);
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handle = adev->handle;
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} else {
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struct acpi_device *adev = to_acpi_dev(acpi_desc);
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cmd_name = nvdimm_bus_cmd_name(cmd);
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dsm_mask = nd_desc->dsm_mask;
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desc = nd_cmd_bus_desc(cmd);
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uuid = to_nfit_uuid(NFIT_DEV_BUS);
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handle = adev->handle;
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dimm_name = "bus";
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}
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if (!desc || (cmd && (desc->out_num + desc->in_num == 0)))
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return -ENOTTY;
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if (!test_bit(cmd, &dsm_mask))
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return -ENOTTY;
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in_obj.type = ACPI_TYPE_PACKAGE;
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in_obj.package.count = 1;
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in_obj.package.elements = &in_buf;
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in_buf.type = ACPI_TYPE_BUFFER;
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in_buf.buffer.pointer = buf;
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in_buf.buffer.length = 0;
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/* libnvdimm has already validated the input envelope */
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for (i = 0; i < desc->in_num; i++)
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in_buf.buffer.length += nd_cmd_in_size(nvdimm, cmd, desc,
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i, buf);
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if (IS_ENABLED(CONFIG_ACPI_NFIT_DEBUG)) {
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dev_dbg(dev, "%s:%s cmd: %s input length: %d\n", __func__,
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dimm_name, cmd_name, in_buf.buffer.length);
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print_hex_dump_debug(cmd_name, DUMP_PREFIX_OFFSET, 4,
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4, in_buf.buffer.pointer, min_t(u32, 128,
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in_buf.buffer.length), true);
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}
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out_obj = acpi_evaluate_dsm(handle, uuid, 1, cmd, &in_obj);
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if (!out_obj) {
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dev_dbg(dev, "%s:%s _DSM failed cmd: %s\n", __func__, dimm_name,
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cmd_name);
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return -EINVAL;
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}
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if (out_obj->package.type != ACPI_TYPE_BUFFER) {
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dev_dbg(dev, "%s:%s unexpected output object type cmd: %s type: %d\n",
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__func__, dimm_name, cmd_name, out_obj->type);
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rc = -EINVAL;
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goto out;
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}
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if (IS_ENABLED(CONFIG_ACPI_NFIT_DEBUG)) {
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dev_dbg(dev, "%s:%s cmd: %s output length: %d\n", __func__,
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dimm_name, cmd_name, out_obj->buffer.length);
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print_hex_dump_debug(cmd_name, DUMP_PREFIX_OFFSET, 4,
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4, out_obj->buffer.pointer, min_t(u32, 128,
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out_obj->buffer.length), true);
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}
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for (i = 0, offset = 0; i < desc->out_num; i++) {
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u32 out_size = nd_cmd_out_size(nvdimm, cmd, desc, i, buf,
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(u32 *) out_obj->buffer.pointer);
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if (offset + out_size > out_obj->buffer.length) {
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dev_dbg(dev, "%s:%s output object underflow cmd: %s field: %d\n",
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__func__, dimm_name, cmd_name, i);
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break;
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}
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if (in_buf.buffer.length + offset + out_size > buf_len) {
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dev_dbg(dev, "%s:%s output overrun cmd: %s field: %d\n",
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__func__, dimm_name, cmd_name, i);
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rc = -ENXIO;
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goto out;
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}
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memcpy(buf + in_buf.buffer.length + offset,
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out_obj->buffer.pointer + offset, out_size);
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offset += out_size;
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}
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if (offset + in_buf.buffer.length < buf_len) {
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if (i >= 1) {
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/*
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* status valid, return the number of bytes left
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* unfilled in the output buffer
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*/
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rc = buf_len - offset - in_buf.buffer.length;
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} else {
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dev_err(dev, "%s:%s underrun cmd: %s buf_len: %d out_len: %d\n",
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__func__, dimm_name, cmd_name, buf_len,
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offset);
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rc = -ENXIO;
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}
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} else
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rc = 0;
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out:
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ACPI_FREE(out_obj);
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return rc;
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}
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static const char *spa_type_name(u16 type)
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@ -489,6 +632,7 @@ static struct attribute_group acpi_nfit_dimm_attribute_group = {
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};
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static const struct attribute_group *acpi_nfit_dimm_attribute_groups[] = {
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&nvdimm_attribute_group,
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&acpi_nfit_dimm_attribute_group,
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NULL,
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};
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@ -505,6 +649,50 @@ static struct nvdimm *acpi_nfit_dimm_by_handle(struct acpi_nfit_desc *acpi_desc,
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return NULL;
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}
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static int acpi_nfit_add_dimm(struct acpi_nfit_desc *acpi_desc,
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struct nfit_mem *nfit_mem, u32 device_handle)
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{
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struct acpi_device *adev, *adev_dimm;
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struct device *dev = acpi_desc->dev;
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const u8 *uuid = to_nfit_uuid(NFIT_DEV_DIMM);
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unsigned long long sta;
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int i, rc = -ENODEV;
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acpi_status status;
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nfit_mem->dsm_mask = acpi_desc->dimm_dsm_force_en;
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adev = to_acpi_dev(acpi_desc);
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if (!adev)
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return 0;
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adev_dimm = acpi_find_child_device(adev, device_handle, false);
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nfit_mem->adev = adev_dimm;
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if (!adev_dimm) {
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dev_err(dev, "no ACPI.NFIT device with _ADR %#x, disabling...\n",
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device_handle);
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return -ENODEV;
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}
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status = acpi_evaluate_integer(adev_dimm->handle, "_STA", NULL, &sta);
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if (status == AE_NOT_FOUND) {
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dev_dbg(dev, "%s missing _STA, assuming enabled...\n",
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dev_name(&adev_dimm->dev));
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rc = 0;
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} else if (ACPI_FAILURE(status))
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dev_err(dev, "%s failed to retrieve_STA, disabling...\n",
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dev_name(&adev_dimm->dev));
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else if ((sta & ACPI_STA_DEVICE_ENABLED) == 0)
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dev_info(dev, "%s disabled by firmware\n",
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dev_name(&adev_dimm->dev));
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else
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rc = 0;
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for (i = ND_CMD_SMART; i <= ND_CMD_VENDOR; i++)
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if (acpi_check_dsm(adev_dimm->handle, uuid, 1, 1ULL << i))
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set_bit(i, &nfit_mem->dsm_mask);
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return rc;
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}
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static int acpi_nfit_register_dimms(struct acpi_nfit_desc *acpi_desc)
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{
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struct nfit_mem *nfit_mem;
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@ -513,6 +701,7 @@ static int acpi_nfit_register_dimms(struct acpi_nfit_desc *acpi_desc)
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struct nvdimm *nvdimm;
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unsigned long flags = 0;
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u32 device_handle;
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int rc;
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device_handle = __to_nfit_memdev(nfit_mem)->device_handle;
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nvdimm = acpi_nfit_dimm_by_handle(acpi_desc, device_handle);
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@ -529,8 +718,13 @@ static int acpi_nfit_register_dimms(struct acpi_nfit_desc *acpi_desc)
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if (nfit_mem->bdw && nfit_mem->memdev_pmem)
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flags |= NDD_ALIASING;
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rc = acpi_nfit_add_dimm(acpi_desc, nfit_mem, device_handle);
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if (rc)
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continue;
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nvdimm = nvdimm_create(acpi_desc->nvdimm_bus, nfit_mem,
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acpi_nfit_dimm_attribute_groups, flags);
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acpi_nfit_dimm_attribute_groups,
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flags, &nfit_mem->dsm_mask);
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if (!nvdimm)
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return -ENOMEM;
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@ -540,6 +734,22 @@ static int acpi_nfit_register_dimms(struct acpi_nfit_desc *acpi_desc)
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return 0;
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}
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static void acpi_nfit_init_dsms(struct acpi_nfit_desc *acpi_desc)
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{
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struct nvdimm_bus_descriptor *nd_desc = &acpi_desc->nd_desc;
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const u8 *uuid = to_nfit_uuid(NFIT_DEV_BUS);
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struct acpi_device *adev;
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int i;
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adev = to_acpi_dev(acpi_desc);
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if (!adev)
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return;
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for (i = ND_CMD_ARS_CAP; i <= ND_CMD_ARS_STATUS; i++)
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if (acpi_check_dsm(adev->handle, uuid, 1, 1ULL << i))
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set_bit(i, &nd_desc->dsm_mask);
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}
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static int acpi_nfit_init(struct acpi_nfit_desc *acpi_desc, acpi_size sz)
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{
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struct device *dev = acpi_desc->dev;
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@ -567,6 +777,8 @@ static int acpi_nfit_init(struct acpi_nfit_desc *acpi_desc, acpi_size sz)
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if (nfit_mem_init(acpi_desc) != 0)
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return -ENOMEM;
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acpi_nfit_init_dsms(acpi_desc);
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return acpi_nfit_register_dimms(acpi_desc);
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}
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@ -67,6 +67,8 @@ struct nfit_mem {
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struct acpi_nfit_system_address *spa_dcr;
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struct acpi_nfit_system_address *spa_bdw;
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struct list_head list;
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struct acpi_device *adev;
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unsigned long dsm_mask;
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};
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struct acpi_nfit_desc {
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@ -79,6 +81,7 @@ struct acpi_nfit_desc {
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struct list_head bdws;
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struct nvdimm_bus *nvdimm_bus;
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struct device *dev;
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unsigned long dimm_dsm_force_en;
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};
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static inline struct acpi_nfit_memory_map *__to_nfit_memdev(
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@ -11,14 +11,18 @@
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* General Public License for more details.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/vmalloc.h>
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#include <linux/uaccess.h>
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#include <linux/fcntl.h>
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#include <linux/async.h>
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#include <linux/ndctl.h>
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#include <linux/slab.h>
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#include <linux/fs.h>
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#include <linux/io.h>
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#include <linux/mm.h>
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#include "nd-core.h"
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int nvdimm_major;
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static int nvdimm_bus_major;
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static struct class *nd_class;
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@ -47,19 +51,325 @@ void nvdimm_bus_destroy_ndctl(struct nvdimm_bus *nvdimm_bus)
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device_destroy(nd_class, MKDEV(nvdimm_bus_major, nvdimm_bus->id));
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}
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static const struct nd_cmd_desc __nd_cmd_dimm_descs[] = {
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[ND_CMD_IMPLEMENTED] = { },
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[ND_CMD_SMART] = {
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.out_num = 2,
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.out_sizes = { 4, 8, },
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},
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[ND_CMD_SMART_THRESHOLD] = {
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.out_num = 2,
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.out_sizes = { 4, 8, },
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},
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[ND_CMD_DIMM_FLAGS] = {
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.out_num = 2,
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.out_sizes = { 4, 4 },
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},
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[ND_CMD_GET_CONFIG_SIZE] = {
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.out_num = 3,
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.out_sizes = { 4, 4, 4, },
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},
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[ND_CMD_GET_CONFIG_DATA] = {
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.in_num = 2,
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.in_sizes = { 4, 4, },
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.out_num = 2,
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.out_sizes = { 4, UINT_MAX, },
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},
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[ND_CMD_SET_CONFIG_DATA] = {
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.in_num = 3,
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.in_sizes = { 4, 4, UINT_MAX, },
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.out_num = 1,
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.out_sizes = { 4, },
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},
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[ND_CMD_VENDOR] = {
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.in_num = 3,
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.in_sizes = { 4, 4, UINT_MAX, },
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.out_num = 3,
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.out_sizes = { 4, 4, UINT_MAX, },
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},
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};
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const struct nd_cmd_desc *nd_cmd_dimm_desc(int cmd)
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{
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if (cmd < ARRAY_SIZE(__nd_cmd_dimm_descs))
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return &__nd_cmd_dimm_descs[cmd];
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return NULL;
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}
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EXPORT_SYMBOL_GPL(nd_cmd_dimm_desc);
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static const struct nd_cmd_desc __nd_cmd_bus_descs[] = {
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[ND_CMD_IMPLEMENTED] = { },
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[ND_CMD_ARS_CAP] = {
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.in_num = 2,
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.in_sizes = { 8, 8, },
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.out_num = 2,
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.out_sizes = { 4, 4, },
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},
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[ND_CMD_ARS_START] = {
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.in_num = 4,
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.in_sizes = { 8, 8, 2, 6, },
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.out_num = 1,
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.out_sizes = { 4, },
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},
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[ND_CMD_ARS_STATUS] = {
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.out_num = 2,
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.out_sizes = { 4, UINT_MAX, },
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},
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};
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const struct nd_cmd_desc *nd_cmd_bus_desc(int cmd)
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{
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if (cmd < ARRAY_SIZE(__nd_cmd_bus_descs))
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return &__nd_cmd_bus_descs[cmd];
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return NULL;
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}
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EXPORT_SYMBOL_GPL(nd_cmd_bus_desc);
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|
||||
u32 nd_cmd_in_size(struct nvdimm *nvdimm, int cmd,
|
||||
const struct nd_cmd_desc *desc, int idx, void *buf)
|
||||
{
|
||||
if (idx >= desc->in_num)
|
||||
return UINT_MAX;
|
||||
|
||||
if (desc->in_sizes[idx] < UINT_MAX)
|
||||
return desc->in_sizes[idx];
|
||||
|
||||
if (nvdimm && cmd == ND_CMD_SET_CONFIG_DATA && idx == 2) {
|
||||
struct nd_cmd_set_config_hdr *hdr = buf;
|
||||
|
||||
return hdr->in_length;
|
||||
} else if (nvdimm && cmd == ND_CMD_VENDOR && idx == 2) {
|
||||
struct nd_cmd_vendor_hdr *hdr = buf;
|
||||
|
||||
return hdr->in_length;
|
||||
}
|
||||
|
||||
return UINT_MAX;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(nd_cmd_in_size);
|
||||
|
||||
u32 nd_cmd_out_size(struct nvdimm *nvdimm, int cmd,
|
||||
const struct nd_cmd_desc *desc, int idx, const u32 *in_field,
|
||||
const u32 *out_field)
|
||||
{
|
||||
if (idx >= desc->out_num)
|
||||
return UINT_MAX;
|
||||
|
||||
if (desc->out_sizes[idx] < UINT_MAX)
|
||||
return desc->out_sizes[idx];
|
||||
|
||||
if (nvdimm && cmd == ND_CMD_GET_CONFIG_DATA && idx == 1)
|
||||
return in_field[1];
|
||||
else if (nvdimm && cmd == ND_CMD_VENDOR && idx == 2)
|
||||
return out_field[1];
|
||||
else if (!nvdimm && cmd == ND_CMD_ARS_STATUS && idx == 1)
|
||||
return ND_CMD_ARS_STATUS_MAX;
|
||||
|
||||
return UINT_MAX;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(nd_cmd_out_size);
|
||||
|
||||
static int __nd_ioctl(struct nvdimm_bus *nvdimm_bus, struct nvdimm *nvdimm,
|
||||
int read_only, unsigned int ioctl_cmd, unsigned long arg)
|
||||
{
|
||||
struct nvdimm_bus_descriptor *nd_desc = nvdimm_bus->nd_desc;
|
||||
size_t buf_len = 0, in_len = 0, out_len = 0;
|
||||
static char out_env[ND_CMD_MAX_ENVELOPE];
|
||||
static char in_env[ND_CMD_MAX_ENVELOPE];
|
||||
const struct nd_cmd_desc *desc = NULL;
|
||||
unsigned int cmd = _IOC_NR(ioctl_cmd);
|
||||
void __user *p = (void __user *) arg;
|
||||
struct device *dev = &nvdimm_bus->dev;
|
||||
const char *cmd_name, *dimm_name;
|
||||
unsigned long dsm_mask;
|
||||
void *buf;
|
||||
int rc, i;
|
||||
|
||||
if (nvdimm) {
|
||||
desc = nd_cmd_dimm_desc(cmd);
|
||||
cmd_name = nvdimm_cmd_name(cmd);
|
||||
dsm_mask = nvdimm->dsm_mask ? *(nvdimm->dsm_mask) : 0;
|
||||
dimm_name = dev_name(&nvdimm->dev);
|
||||
} else {
|
||||
desc = nd_cmd_bus_desc(cmd);
|
||||
cmd_name = nvdimm_bus_cmd_name(cmd);
|
||||
dsm_mask = nd_desc->dsm_mask;
|
||||
dimm_name = "bus";
|
||||
}
|
||||
|
||||
if (!desc || (desc->out_num + desc->in_num == 0) ||
|
||||
!test_bit(cmd, &dsm_mask))
|
||||
return -ENOTTY;
|
||||
|
||||
/* fail write commands (when read-only) */
|
||||
if (read_only)
|
||||
switch (ioctl_cmd) {
|
||||
case ND_IOCTL_VENDOR:
|
||||
case ND_IOCTL_SET_CONFIG_DATA:
|
||||
case ND_IOCTL_ARS_START:
|
||||
dev_dbg(&nvdimm_bus->dev, "'%s' command while read-only.\n",
|
||||
nvdimm ? nvdimm_cmd_name(cmd)
|
||||
: nvdimm_bus_cmd_name(cmd));
|
||||
return -EPERM;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
|
||||
/* process an input envelope */
|
||||
for (i = 0; i < desc->in_num; i++) {
|
||||
u32 in_size, copy;
|
||||
|
||||
in_size = nd_cmd_in_size(nvdimm, cmd, desc, i, in_env);
|
||||
if (in_size == UINT_MAX) {
|
||||
dev_err(dev, "%s:%s unknown input size cmd: %s field: %d\n",
|
||||
__func__, dimm_name, cmd_name, i);
|
||||
return -ENXIO;
|
||||
}
|
||||
if (!access_ok(VERIFY_READ, p + in_len, in_size))
|
||||
return -EFAULT;
|
||||
if (in_len < sizeof(in_env))
|
||||
copy = min_t(u32, sizeof(in_env) - in_len, in_size);
|
||||
else
|
||||
copy = 0;
|
||||
if (copy && copy_from_user(&in_env[in_len], p + in_len, copy))
|
||||
return -EFAULT;
|
||||
in_len += in_size;
|
||||
}
|
||||
|
||||
/* process an output envelope */
|
||||
for (i = 0; i < desc->out_num; i++) {
|
||||
u32 out_size = nd_cmd_out_size(nvdimm, cmd, desc, i,
|
||||
(u32 *) in_env, (u32 *) out_env);
|
||||
u32 copy;
|
||||
|
||||
if (out_size == UINT_MAX) {
|
||||
dev_dbg(dev, "%s:%s unknown output size cmd: %s field: %d\n",
|
||||
__func__, dimm_name, cmd_name, i);
|
||||
return -EFAULT;
|
||||
}
|
||||
if (!access_ok(VERIFY_WRITE, p + in_len + out_len, out_size))
|
||||
return -EFAULT;
|
||||
if (out_len < sizeof(out_env))
|
||||
copy = min_t(u32, sizeof(out_env) - out_len, out_size);
|
||||
else
|
||||
copy = 0;
|
||||
if (copy && copy_from_user(&out_env[out_len],
|
||||
p + in_len + out_len, copy))
|
||||
return -EFAULT;
|
||||
out_len += out_size;
|
||||
}
|
||||
|
||||
buf_len = out_len + in_len;
|
||||
if (!access_ok(VERIFY_WRITE, p, sizeof(buf_len)))
|
||||
return -EFAULT;
|
||||
|
||||
if (buf_len > ND_IOCTL_MAX_BUFLEN) {
|
||||
dev_dbg(dev, "%s:%s cmd: %s buf_len: %zu > %d\n", __func__,
|
||||
dimm_name, cmd_name, buf_len,
|
||||
ND_IOCTL_MAX_BUFLEN);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
buf = vmalloc(buf_len);
|
||||
if (!buf)
|
||||
return -ENOMEM;
|
||||
|
||||
if (copy_from_user(buf, p, buf_len)) {
|
||||
rc = -EFAULT;
|
||||
goto out;
|
||||
}
|
||||
|
||||
rc = nd_desc->ndctl(nd_desc, nvdimm, cmd, buf, buf_len);
|
||||
if (rc < 0)
|
||||
goto out;
|
||||
if (copy_to_user(p, buf, buf_len))
|
||||
rc = -EFAULT;
|
||||
out:
|
||||
vfree(buf);
|
||||
return rc;
|
||||
}
|
||||
|
||||
static long nd_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
|
||||
{
|
||||
return -ENXIO;
|
||||
long id = (long) file->private_data;
|
||||
int rc = -ENXIO, read_only;
|
||||
struct nvdimm_bus *nvdimm_bus;
|
||||
|
||||
read_only = (O_RDWR != (file->f_flags & O_ACCMODE));
|
||||
mutex_lock(&nvdimm_bus_list_mutex);
|
||||
list_for_each_entry(nvdimm_bus, &nvdimm_bus_list, list) {
|
||||
if (nvdimm_bus->id == id) {
|
||||
rc = __nd_ioctl(nvdimm_bus, NULL, read_only, cmd, arg);
|
||||
break;
|
||||
}
|
||||
}
|
||||
mutex_unlock(&nvdimm_bus_list_mutex);
|
||||
|
||||
return rc;
|
||||
}
|
||||
|
||||
static int match_dimm(struct device *dev, void *data)
|
||||
{
|
||||
long id = (long) data;
|
||||
|
||||
if (is_nvdimm(dev)) {
|
||||
struct nvdimm *nvdimm = to_nvdimm(dev);
|
||||
|
||||
return nvdimm->id == id;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static long nvdimm_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
|
||||
{
|
||||
int rc = -ENXIO, read_only;
|
||||
struct nvdimm_bus *nvdimm_bus;
|
||||
|
||||
read_only = (O_RDWR != (file->f_flags & O_ACCMODE));
|
||||
mutex_lock(&nvdimm_bus_list_mutex);
|
||||
list_for_each_entry(nvdimm_bus, &nvdimm_bus_list, list) {
|
||||
struct device *dev = device_find_child(&nvdimm_bus->dev,
|
||||
file->private_data, match_dimm);
|
||||
struct nvdimm *nvdimm;
|
||||
|
||||
if (!dev)
|
||||
continue;
|
||||
|
||||
nvdimm = to_nvdimm(dev);
|
||||
rc = __nd_ioctl(nvdimm_bus, nvdimm, read_only, cmd, arg);
|
||||
put_device(dev);
|
||||
break;
|
||||
}
|
||||
mutex_unlock(&nvdimm_bus_list_mutex);
|
||||
|
||||
return rc;
|
||||
}
|
||||
|
||||
static int nd_open(struct inode *inode, struct file *file)
|
||||
{
|
||||
long minor = iminor(inode);
|
||||
|
||||
file->private_data = (void *) minor;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct file_operations nvdimm_bus_fops = {
|
||||
.owner = THIS_MODULE,
|
||||
.open = nonseekable_open,
|
||||
.open = nd_open,
|
||||
.unlocked_ioctl = nd_ioctl,
|
||||
.compat_ioctl = nd_ioctl,
|
||||
.llseek = noop_llseek,
|
||||
};
|
||||
|
||||
static const struct file_operations nvdimm_fops = {
|
||||
.owner = THIS_MODULE,
|
||||
.open = nd_open,
|
||||
.unlocked_ioctl = nvdimm_ioctl,
|
||||
.compat_ioctl = nvdimm_ioctl,
|
||||
.llseek = noop_llseek,
|
||||
};
|
||||
|
||||
int __init nvdimm_bus_init(void)
|
||||
{
|
||||
int rc;
|
||||
|
@ -70,9 +380,14 @@ int __init nvdimm_bus_init(void)
|
|||
|
||||
rc = register_chrdev(0, "ndctl", &nvdimm_bus_fops);
|
||||
if (rc < 0)
|
||||
goto err_chrdev;
|
||||
goto err_bus_chrdev;
|
||||
nvdimm_bus_major = rc;
|
||||
|
||||
rc = register_chrdev(0, "dimmctl", &nvdimm_fops);
|
||||
if (rc < 0)
|
||||
goto err_dimm_chrdev;
|
||||
nvdimm_major = rc;
|
||||
|
||||
nd_class = class_create(THIS_MODULE, "nd");
|
||||
if (IS_ERR(nd_class))
|
||||
goto err_class;
|
||||
|
@ -80,8 +395,10 @@ int __init nvdimm_bus_init(void)
|
|||
return 0;
|
||||
|
||||
err_class:
|
||||
unregister_chrdev(nvdimm_major, "dimmctl");
|
||||
err_dimm_chrdev:
|
||||
unregister_chrdev(nvdimm_bus_major, "ndctl");
|
||||
err_chrdev:
|
||||
err_bus_chrdev:
|
||||
bus_unregister(&nvdimm_bus_type);
|
||||
|
||||
return rc;
|
||||
|
@ -91,5 +408,6 @@ void __exit nvdimm_bus_exit(void)
|
|||
{
|
||||
class_destroy(nd_class);
|
||||
unregister_chrdev(nvdimm_bus_major, "ndctl");
|
||||
unregister_chrdev(nvdimm_major, "dimmctl");
|
||||
bus_unregister(&nvdimm_bus_type);
|
||||
}
|
||||
|
|
|
@ -14,6 +14,7 @@
|
|||
#include <linux/export.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/device.h>
|
||||
#include <linux/ndctl.h>
|
||||
#include <linux/mutex.h>
|
||||
#include <linux/slab.h>
|
||||
#include "nd-core.h"
|
||||
|
@ -61,6 +62,20 @@ struct nvdimm_bus *walk_to_nvdimm_bus(struct device *nd_dev)
|
|||
return NULL;
|
||||
}
|
||||
|
||||
static ssize_t commands_show(struct device *dev,
|
||||
struct device_attribute *attr, char *buf)
|
||||
{
|
||||
int cmd, len = 0;
|
||||
struct nvdimm_bus *nvdimm_bus = to_nvdimm_bus(dev);
|
||||
struct nvdimm_bus_descriptor *nd_desc = nvdimm_bus->nd_desc;
|
||||
|
||||
for_each_set_bit(cmd, &nd_desc->dsm_mask, BITS_PER_LONG)
|
||||
len += sprintf(buf + len, "%s ", nvdimm_bus_cmd_name(cmd));
|
||||
len += sprintf(buf + len, "\n");
|
||||
return len;
|
||||
}
|
||||
static DEVICE_ATTR_RO(commands);
|
||||
|
||||
static const char *nvdimm_bus_provider(struct nvdimm_bus *nvdimm_bus)
|
||||
{
|
||||
struct nvdimm_bus_descriptor *nd_desc = nvdimm_bus->nd_desc;
|
||||
|
@ -84,6 +99,7 @@ static ssize_t provider_show(struct device *dev,
|
|||
static DEVICE_ATTR_RO(provider);
|
||||
|
||||
static struct attribute *nvdimm_bus_attributes[] = {
|
||||
&dev_attr_commands.attr,
|
||||
&dev_attr_provider.attr,
|
||||
NULL,
|
||||
};
|
||||
|
|
|
@ -12,6 +12,7 @@
|
|||
*/
|
||||
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
||||
#include <linux/device.h>
|
||||
#include <linux/ndctl.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/io.h>
|
||||
#include <linux/fs.h>
|
||||
|
@ -33,7 +34,7 @@ static struct device_type nvdimm_device_type = {
|
|||
.release = nvdimm_release,
|
||||
};
|
||||
|
||||
static bool is_nvdimm(struct device *dev)
|
||||
bool is_nvdimm(struct device *dev)
|
||||
{
|
||||
return dev->type == &nvdimm_device_type;
|
||||
}
|
||||
|
@ -55,12 +56,41 @@ EXPORT_SYMBOL_GPL(nvdimm_name);
|
|||
|
||||
void *nvdimm_provider_data(struct nvdimm *nvdimm)
|
||||
{
|
||||
return nvdimm->provider_data;
|
||||
if (nvdimm)
|
||||
return nvdimm->provider_data;
|
||||
return NULL;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(nvdimm_provider_data);
|
||||
|
||||
static ssize_t commands_show(struct device *dev,
|
||||
struct device_attribute *attr, char *buf)
|
||||
{
|
||||
struct nvdimm *nvdimm = to_nvdimm(dev);
|
||||
int cmd, len = 0;
|
||||
|
||||
if (!nvdimm->dsm_mask)
|
||||
return sprintf(buf, "\n");
|
||||
|
||||
for_each_set_bit(cmd, nvdimm->dsm_mask, BITS_PER_LONG)
|
||||
len += sprintf(buf + len, "%s ", nvdimm_cmd_name(cmd));
|
||||
len += sprintf(buf + len, "\n");
|
||||
return len;
|
||||
}
|
||||
static DEVICE_ATTR_RO(commands);
|
||||
|
||||
static struct attribute *nvdimm_attributes[] = {
|
||||
&dev_attr_commands.attr,
|
||||
NULL,
|
||||
};
|
||||
|
||||
struct attribute_group nvdimm_attribute_group = {
|
||||
.attrs = nvdimm_attributes,
|
||||
};
|
||||
EXPORT_SYMBOL_GPL(nvdimm_attribute_group);
|
||||
|
||||
struct nvdimm *nvdimm_create(struct nvdimm_bus *nvdimm_bus, void *provider_data,
|
||||
const struct attribute_group **groups, unsigned long flags)
|
||||
const struct attribute_group **groups, unsigned long flags,
|
||||
unsigned long *dsm_mask)
|
||||
{
|
||||
struct nvdimm *nvdimm = kzalloc(sizeof(*nvdimm), GFP_KERNEL);
|
||||
struct device *dev;
|
||||
|
@ -75,12 +105,14 @@ struct nvdimm *nvdimm_create(struct nvdimm_bus *nvdimm_bus, void *provider_data,
|
|||
}
|
||||
nvdimm->provider_data = provider_data;
|
||||
nvdimm->flags = flags;
|
||||
nvdimm->dsm_mask = dsm_mask;
|
||||
|
||||
dev = &nvdimm->dev;
|
||||
dev_set_name(dev, "nmem%d", nvdimm->id);
|
||||
dev->parent = &nvdimm_bus->dev;
|
||||
dev->type = &nvdimm_device_type;
|
||||
dev->bus = &nvdimm_bus_type;
|
||||
dev->devt = MKDEV(nvdimm_major, nvdimm->id);
|
||||
dev->groups = groups;
|
||||
if (device_register(dev) != 0) {
|
||||
put_device(dev);
|
||||
|
|
|
@ -18,6 +18,7 @@
|
|||
extern struct list_head nvdimm_bus_list;
|
||||
extern struct mutex nvdimm_bus_list_mutex;
|
||||
extern struct bus_type nvdimm_bus_type;
|
||||
extern int nvdimm_major;
|
||||
|
||||
struct nvdimm_bus {
|
||||
struct nvdimm_bus_descriptor *nd_desc;
|
||||
|
@ -29,10 +30,12 @@ struct nvdimm_bus {
|
|||
struct nvdimm {
|
||||
unsigned long flags;
|
||||
void *provider_data;
|
||||
unsigned long *dsm_mask;
|
||||
struct device dev;
|
||||
int id;
|
||||
};
|
||||
|
||||
bool is_nvdimm(struct device *dev);
|
||||
struct nvdimm_bus *walk_to_nvdimm_bus(struct device *nd_dev);
|
||||
int __init nvdimm_bus_init(void);
|
||||
void __exit nvdimm_bus_exit(void);
|
||||
|
|
|
@ -14,13 +14,22 @@
|
|||
*/
|
||||
#ifndef __LIBNVDIMM_H__
|
||||
#define __LIBNVDIMM_H__
|
||||
#include <linux/sizes.h>
|
||||
#include <linux/types.h>
|
||||
|
||||
enum {
|
||||
/* when a dimm supports both PMEM and BLK access a label is required */
|
||||
NDD_ALIASING = 1 << 0,
|
||||
|
||||
/* need to set a limit somewhere, but yes, this is likely overkill */
|
||||
ND_IOCTL_MAX_BUFLEN = SZ_4M,
|
||||
ND_CMD_MAX_ELEM = 4,
|
||||
ND_CMD_MAX_ENVELOPE = 16,
|
||||
ND_CMD_ARS_STATUS_MAX = SZ_4K,
|
||||
};
|
||||
|
||||
extern struct attribute_group nvdimm_bus_attribute_group;
|
||||
extern struct attribute_group nvdimm_attribute_group;
|
||||
|
||||
struct nvdimm;
|
||||
struct nvdimm_bus_descriptor;
|
||||
|
@ -35,6 +44,14 @@ struct nvdimm_bus_descriptor {
|
|||
ndctl_fn ndctl;
|
||||
};
|
||||
|
||||
struct nd_cmd_desc {
|
||||
int in_num;
|
||||
int out_num;
|
||||
u32 in_sizes[ND_CMD_MAX_ELEM];
|
||||
int out_sizes[ND_CMD_MAX_ELEM];
|
||||
};
|
||||
|
||||
struct nvdimm_bus;
|
||||
struct device;
|
||||
struct nvdimm_bus *nvdimm_bus_register(struct device *parent,
|
||||
struct nvdimm_bus_descriptor *nfit_desc);
|
||||
|
@ -45,5 +62,13 @@ struct nvdimm_bus_descriptor *to_nd_desc(struct nvdimm_bus *nvdimm_bus);
|
|||
const char *nvdimm_name(struct nvdimm *nvdimm);
|
||||
void *nvdimm_provider_data(struct nvdimm *nvdimm);
|
||||
struct nvdimm *nvdimm_create(struct nvdimm_bus *nvdimm_bus, void *provider_data,
|
||||
const struct attribute_group **groups, unsigned long flags);
|
||||
const struct attribute_group **groups, unsigned long flags,
|
||||
unsigned long *dsm_mask);
|
||||
const struct nd_cmd_desc *nd_cmd_dimm_desc(int cmd);
|
||||
const struct nd_cmd_desc *nd_cmd_bus_desc(int cmd);
|
||||
u32 nd_cmd_in_size(struct nvdimm *nvdimm, int cmd,
|
||||
const struct nd_cmd_desc *desc, int idx, void *buf);
|
||||
u32 nd_cmd_out_size(struct nvdimm *nvdimm, int cmd,
|
||||
const struct nd_cmd_desc *desc, int idx, const u32 *in_field,
|
||||
const u32 *out_field);
|
||||
#endif /* __LIBNVDIMM_H__ */
|
||||
|
|
|
@ -271,6 +271,7 @@ header-y += ncp_fs.h
|
|||
header-y += ncp.h
|
||||
header-y += ncp_mount.h
|
||||
header-y += ncp_no.h
|
||||
header-y += ndctl.h
|
||||
header-y += neighbour.h
|
||||
header-y += netconf.h
|
||||
header-y += netdevice.h
|
||||
|
|
178
include/uapi/linux/ndctl.h
Normal file
178
include/uapi/linux/ndctl.h
Normal file
|
@ -0,0 +1,178 @@
|
|||
/*
|
||||
* Copyright (c) 2014-2015, Intel Corporation.
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify it
|
||||
* under the terms and conditions of the GNU Lesser General Public License,
|
||||
* version 2.1, as published by the Free Software Foundation.
|
||||
*
|
||||
* This program is distributed in the hope it will be useful, but WITHOUT ANY
|
||||
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
|
||||
* FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
|
||||
* more details.
|
||||
*/
|
||||
#ifndef __NDCTL_H__
|
||||
#define __NDCTL_H__
|
||||
|
||||
#include <linux/types.h>
|
||||
|
||||
struct nd_cmd_smart {
|
||||
__u32 status;
|
||||
__u8 data[128];
|
||||
} __packed;
|
||||
|
||||
struct nd_cmd_smart_threshold {
|
||||
__u32 status;
|
||||
__u8 data[8];
|
||||
} __packed;
|
||||
|
||||
struct nd_cmd_dimm_flags {
|
||||
__u32 status;
|
||||
__u32 flags;
|
||||
} __packed;
|
||||
|
||||
struct nd_cmd_get_config_size {
|
||||
__u32 status;
|
||||
__u32 config_size;
|
||||
__u32 max_xfer;
|
||||
} __packed;
|
||||
|
||||
struct nd_cmd_get_config_data_hdr {
|
||||
__u32 in_offset;
|
||||
__u32 in_length;
|
||||
__u32 status;
|
||||
__u8 out_buf[0];
|
||||
} __packed;
|
||||
|
||||
struct nd_cmd_set_config_hdr {
|
||||
__u32 in_offset;
|
||||
__u32 in_length;
|
||||
__u8 in_buf[0];
|
||||
} __packed;
|
||||
|
||||
struct nd_cmd_vendor_hdr {
|
||||
__u32 opcode;
|
||||
__u32 in_length;
|
||||
__u8 in_buf[0];
|
||||
} __packed;
|
||||
|
||||
struct nd_cmd_vendor_tail {
|
||||
__u32 status;
|
||||
__u32 out_length;
|
||||
__u8 out_buf[0];
|
||||
} __packed;
|
||||
|
||||
struct nd_cmd_ars_cap {
|
||||
__u64 address;
|
||||
__u64 length;
|
||||
__u32 status;
|
||||
__u32 max_ars_out;
|
||||
} __packed;
|
||||
|
||||
struct nd_cmd_ars_start {
|
||||
__u64 address;
|
||||
__u64 length;
|
||||
__u16 type;
|
||||
__u8 reserved[6];
|
||||
__u32 status;
|
||||
} __packed;
|
||||
|
||||
struct nd_cmd_ars_status {
|
||||
__u32 status;
|
||||
__u32 out_length;
|
||||
__u64 address;
|
||||
__u64 length;
|
||||
__u16 type;
|
||||
__u32 num_records;
|
||||
struct nd_ars_record {
|
||||
__u32 handle;
|
||||
__u32 flags;
|
||||
__u64 err_address;
|
||||
__u64 mask;
|
||||
} __packed records[0];
|
||||
} __packed;
|
||||
|
||||
enum {
|
||||
ND_CMD_IMPLEMENTED = 0,
|
||||
|
||||
/* bus commands */
|
||||
ND_CMD_ARS_CAP = 1,
|
||||
ND_CMD_ARS_START = 2,
|
||||
ND_CMD_ARS_STATUS = 3,
|
||||
|
||||
/* per-dimm commands */
|
||||
ND_CMD_SMART = 1,
|
||||
ND_CMD_SMART_THRESHOLD = 2,
|
||||
ND_CMD_DIMM_FLAGS = 3,
|
||||
ND_CMD_GET_CONFIG_SIZE = 4,
|
||||
ND_CMD_GET_CONFIG_DATA = 5,
|
||||
ND_CMD_SET_CONFIG_DATA = 6,
|
||||
ND_CMD_VENDOR_EFFECT_LOG_SIZE = 7,
|
||||
ND_CMD_VENDOR_EFFECT_LOG = 8,
|
||||
ND_CMD_VENDOR = 9,
|
||||
};
|
||||
|
||||
static inline const char *nvdimm_bus_cmd_name(unsigned cmd)
|
||||
{
|
||||
static const char * const names[] = {
|
||||
[ND_CMD_ARS_CAP] = "ars_cap",
|
||||
[ND_CMD_ARS_START] = "ars_start",
|
||||
[ND_CMD_ARS_STATUS] = "ars_status",
|
||||
};
|
||||
|
||||
if (cmd < ARRAY_SIZE(names) && names[cmd])
|
||||
return names[cmd];
|
||||
return "unknown";
|
||||
}
|
||||
|
||||
static inline const char *nvdimm_cmd_name(unsigned cmd)
|
||||
{
|
||||
static const char * const names[] = {
|
||||
[ND_CMD_SMART] = "smart",
|
||||
[ND_CMD_SMART_THRESHOLD] = "smart_thresh",
|
||||
[ND_CMD_DIMM_FLAGS] = "flags",
|
||||
[ND_CMD_GET_CONFIG_SIZE] = "get_size",
|
||||
[ND_CMD_GET_CONFIG_DATA] = "get_data",
|
||||
[ND_CMD_SET_CONFIG_DATA] = "set_data",
|
||||
[ND_CMD_VENDOR_EFFECT_LOG_SIZE] = "effect_size",
|
||||
[ND_CMD_VENDOR_EFFECT_LOG] = "effect_log",
|
||||
[ND_CMD_VENDOR] = "vendor",
|
||||
};
|
||||
|
||||
if (cmd < ARRAY_SIZE(names) && names[cmd])
|
||||
return names[cmd];
|
||||
return "unknown";
|
||||
}
|
||||
|
||||
#define ND_IOCTL 'N'
|
||||
|
||||
#define ND_IOCTL_SMART _IOWR(ND_IOCTL, ND_CMD_SMART,\
|
||||
struct nd_cmd_smart)
|
||||
|
||||
#define ND_IOCTL_SMART_THRESHOLD _IOWR(ND_IOCTL, ND_CMD_SMART_THRESHOLD,\
|
||||
struct nd_cmd_smart_threshold)
|
||||
|
||||
#define ND_IOCTL_DIMM_FLAGS _IOWR(ND_IOCTL, ND_CMD_DIMM_FLAGS,\
|
||||
struct nd_cmd_dimm_flags)
|
||||
|
||||
#define ND_IOCTL_GET_CONFIG_SIZE _IOWR(ND_IOCTL, ND_CMD_GET_CONFIG_SIZE,\
|
||||
struct nd_cmd_get_config_size)
|
||||
|
||||
#define ND_IOCTL_GET_CONFIG_DATA _IOWR(ND_IOCTL, ND_CMD_GET_CONFIG_DATA,\
|
||||
struct nd_cmd_get_config_data_hdr)
|
||||
|
||||
#define ND_IOCTL_SET_CONFIG_DATA _IOWR(ND_IOCTL, ND_CMD_SET_CONFIG_DATA,\
|
||||
struct nd_cmd_set_config_hdr)
|
||||
|
||||
#define ND_IOCTL_VENDOR _IOWR(ND_IOCTL, ND_CMD_VENDOR,\
|
||||
struct nd_cmd_vendor_hdr)
|
||||
|
||||
#define ND_IOCTL_ARS_CAP _IOWR(ND_IOCTL, ND_CMD_ARS_CAP,\
|
||||
struct nd_cmd_ars_cap)
|
||||
|
||||
#define ND_IOCTL_ARS_START _IOWR(ND_IOCTL, ND_CMD_ARS_START,\
|
||||
struct nd_cmd_ars_start)
|
||||
|
||||
#define ND_IOCTL_ARS_STATUS _IOWR(ND_IOCTL, ND_CMD_ARS_STATUS,\
|
||||
struct nd_cmd_ars_status)
|
||||
|
||||
#endif /* __NDCTL_H__ */
|
Loading…
Reference in a new issue