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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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2712 lines
72 KiB
C
2712 lines
72 KiB
C
/*
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* Copyright(c) 2013-2015 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*/
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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/mutex.h>
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#include <linux/ndctl.h>
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#include <linux/delay.h>
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#include <linux/list.h>
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#include <linux/acpi.h>
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#include <linux/sort.h>
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#include <linux/pmem.h>
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#include <linux/io.h>
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#include <linux/nd.h>
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#include <asm/cacheflush.h>
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#include "nfit.h"
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/*
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* For readq() and writeq() on 32-bit builds, the hi-lo, lo-hi order is
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* irrelevant.
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*/
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#include <linux/io-64-nonatomic-hi-lo.h>
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static bool force_enable_dimms;
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module_param(force_enable_dimms, bool, S_IRUGO|S_IWUSR);
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MODULE_PARM_DESC(force_enable_dimms, "Ignore _STA (ACPI DIMM device) status");
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static unsigned int scrub_timeout = NFIT_ARS_TIMEOUT;
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module_param(scrub_timeout, uint, S_IRUGO|S_IWUSR);
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MODULE_PARM_DESC(scrub_timeout, "Initial scrub timeout in seconds");
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/* after three payloads of overflow, it's dead jim */
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static unsigned int scrub_overflow_abort = 3;
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module_param(scrub_overflow_abort, uint, S_IRUGO|S_IWUSR);
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MODULE_PARM_DESC(scrub_overflow_abort,
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"Number of times we overflow ARS results before abort");
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static bool disable_vendor_specific;
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module_param(disable_vendor_specific, bool, S_IRUGO);
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MODULE_PARM_DESC(disable_vendor_specific,
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"Limit commands to the publicly specified set\n");
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static struct workqueue_struct *nfit_wq;
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struct nfit_table_prev {
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struct list_head spas;
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struct list_head memdevs;
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struct list_head dcrs;
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struct list_head bdws;
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struct list_head idts;
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struct list_head flushes;
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};
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static u8 nfit_uuid[NFIT_UUID_MAX][16];
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const u8 *to_nfit_uuid(enum nfit_uuids id)
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{
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return nfit_uuid[id];
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}
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EXPORT_SYMBOL(to_nfit_uuid);
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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 xlat_status(void *buf, unsigned int cmd)
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{
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struct nd_cmd_clear_error *clear_err;
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struct nd_cmd_ars_status *ars_status;
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struct nd_cmd_ars_start *ars_start;
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struct nd_cmd_ars_cap *ars_cap;
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u16 flags;
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switch (cmd) {
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case ND_CMD_ARS_CAP:
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ars_cap = buf;
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if ((ars_cap->status & 0xffff) == NFIT_ARS_CAP_NONE)
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return -ENOTTY;
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/* Command failed */
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if (ars_cap->status & 0xffff)
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return -EIO;
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/* No supported scan types for this range */
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flags = ND_ARS_PERSISTENT | ND_ARS_VOLATILE;
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if ((ars_cap->status >> 16 & flags) == 0)
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return -ENOTTY;
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break;
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case ND_CMD_ARS_START:
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ars_start = buf;
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/* ARS is in progress */
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if ((ars_start->status & 0xffff) == NFIT_ARS_START_BUSY)
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return -EBUSY;
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/* Command failed */
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if (ars_start->status & 0xffff)
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return -EIO;
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break;
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case ND_CMD_ARS_STATUS:
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ars_status = buf;
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/* Command failed */
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if (ars_status->status & 0xffff)
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return -EIO;
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/* Check extended status (Upper two bytes) */
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if (ars_status->status == NFIT_ARS_STATUS_DONE)
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return 0;
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/* ARS is in progress */
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if (ars_status->status == NFIT_ARS_STATUS_BUSY)
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return -EBUSY;
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/* No ARS performed for the current boot */
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if (ars_status->status == NFIT_ARS_STATUS_NONE)
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return -EAGAIN;
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/*
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* ARS interrupted, either we overflowed or some other
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* agent wants the scan to stop. If we didn't overflow
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* then just continue with the returned results.
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*/
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if (ars_status->status == NFIT_ARS_STATUS_INTR) {
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if (ars_status->flags & NFIT_ARS_F_OVERFLOW)
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return -ENOSPC;
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return 0;
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}
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/* Unknown status */
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if (ars_status->status >> 16)
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return -EIO;
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break;
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case ND_CMD_CLEAR_ERROR:
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clear_err = buf;
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if (clear_err->status & 0xffff)
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return -EIO;
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if (!clear_err->cleared)
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return -EIO;
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if (clear_err->length > clear_err->cleared)
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return clear_err->cleared;
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break;
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default:
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break;
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}
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return 0;
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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, int *cmd_rc)
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{
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struct acpi_nfit_desc *acpi_desc = to_acpi_nfit_desc(nd_desc);
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union acpi_object in_obj, in_buf, *out_obj;
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const struct nd_cmd_desc *desc = NULL;
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struct device *dev = acpi_desc->dev;
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struct nd_cmd_pkg *call_pkg = NULL;
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const char *cmd_name, *dimm_name;
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unsigned long cmd_mask, dsm_mask;
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acpi_handle handle;
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unsigned int func;
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const u8 *uuid;
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u32 offset;
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int rc, i;
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func = cmd;
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if (cmd == ND_CMD_CALL) {
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call_pkg = buf;
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func = call_pkg->nd_command;
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}
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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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if (call_pkg && nfit_mem->family != call_pkg->nd_family)
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return -ENOTTY;
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dimm_name = nvdimm_name(nvdimm);
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cmd_name = nvdimm_cmd_name(cmd);
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cmd_mask = nvdimm_cmd_mask(nvdimm);
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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_mem->family);
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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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cmd_mask = nd_desc->cmd_mask;
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dsm_mask = cmd_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, &cmd_mask) || !test_bit(func, &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 (call_pkg) {
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/* skip over package wrapper */
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in_buf.buffer.pointer = (void *) &call_pkg->nd_payload;
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in_buf.buffer.length = call_pkg->nd_size_in;
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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: %d: func: %d input length: %d\n",
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__func__, dimm_name, cmd, func,
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in_buf.buffer.length);
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print_hex_dump_debug("nvdimm in ", DUMP_PREFIX_OFFSET, 4, 4,
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in_buf.buffer.pointer,
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min_t(u32, 256, in_buf.buffer.length), true);
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}
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out_obj = acpi_evaluate_dsm(handle, uuid, 1, func, &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 (call_pkg) {
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call_pkg->nd_fw_size = out_obj->buffer.length;
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memcpy(call_pkg->nd_payload + call_pkg->nd_size_in,
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out_obj->buffer.pointer,
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min(call_pkg->nd_fw_size, call_pkg->nd_size_out));
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ACPI_FREE(out_obj);
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/*
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* Need to support FW function w/o known size in advance.
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* Caller can determine required size based upon nd_fw_size.
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* If we return an error (like elsewhere) then caller wouldn't
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* be able to rely upon data returned to make calculation.
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*/
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return 0;
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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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if (cmd_rc)
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*cmd_rc = xlat_status(buf, cmd);
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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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if (cmd_rc)
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*cmd_rc = xlat_status(buf, cmd);
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}
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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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{
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static const char *to_name[] = {
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[NFIT_SPA_VOLATILE] = "volatile",
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[NFIT_SPA_PM] = "pmem",
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[NFIT_SPA_DCR] = "dimm-control-region",
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[NFIT_SPA_BDW] = "block-data-window",
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[NFIT_SPA_VDISK] = "volatile-disk",
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[NFIT_SPA_VCD] = "volatile-cd",
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[NFIT_SPA_PDISK] = "persistent-disk",
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[NFIT_SPA_PCD] = "persistent-cd",
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};
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if (type > NFIT_SPA_PCD)
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return "unknown";
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return to_name[type];
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}
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static int nfit_spa_type(struct acpi_nfit_system_address *spa)
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{
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int i;
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for (i = 0; i < NFIT_UUID_MAX; i++)
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if (memcmp(to_nfit_uuid(i), spa->range_guid, 16) == 0)
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return i;
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return -1;
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}
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static bool add_spa(struct acpi_nfit_desc *acpi_desc,
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struct nfit_table_prev *prev,
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struct acpi_nfit_system_address *spa)
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{
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size_t length = min_t(size_t, sizeof(*spa), spa->header.length);
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struct device *dev = acpi_desc->dev;
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struct nfit_spa *nfit_spa;
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list_for_each_entry(nfit_spa, &prev->spas, list) {
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if (memcmp(nfit_spa->spa, spa, length) == 0) {
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list_move_tail(&nfit_spa->list, &acpi_desc->spas);
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return true;
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}
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}
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nfit_spa = devm_kzalloc(dev, sizeof(*nfit_spa), GFP_KERNEL);
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if (!nfit_spa)
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return false;
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INIT_LIST_HEAD(&nfit_spa->list);
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nfit_spa->spa = spa;
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list_add_tail(&nfit_spa->list, &acpi_desc->spas);
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dev_dbg(dev, "%s: spa index: %d type: %s\n", __func__,
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spa->range_index,
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spa_type_name(nfit_spa_type(spa)));
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return true;
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}
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static bool add_memdev(struct acpi_nfit_desc *acpi_desc,
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struct nfit_table_prev *prev,
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struct acpi_nfit_memory_map *memdev)
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{
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size_t length = min_t(size_t, sizeof(*memdev), memdev->header.length);
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struct device *dev = acpi_desc->dev;
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struct nfit_memdev *nfit_memdev;
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list_for_each_entry(nfit_memdev, &prev->memdevs, list)
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if (memcmp(nfit_memdev->memdev, memdev, length) == 0) {
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list_move_tail(&nfit_memdev->list, &acpi_desc->memdevs);
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return true;
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}
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nfit_memdev = devm_kzalloc(dev, sizeof(*nfit_memdev), GFP_KERNEL);
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if (!nfit_memdev)
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return false;
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INIT_LIST_HEAD(&nfit_memdev->list);
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nfit_memdev->memdev = memdev;
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list_add_tail(&nfit_memdev->list, &acpi_desc->memdevs);
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dev_dbg(dev, "%s: memdev handle: %#x spa: %d dcr: %d\n",
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__func__, memdev->device_handle, memdev->range_index,
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memdev->region_index);
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return true;
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}
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static bool add_dcr(struct acpi_nfit_desc *acpi_desc,
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struct nfit_table_prev *prev,
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struct acpi_nfit_control_region *dcr)
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{
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size_t length = min_t(size_t, sizeof(*dcr), dcr->header.length);
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struct device *dev = acpi_desc->dev;
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struct nfit_dcr *nfit_dcr;
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list_for_each_entry(nfit_dcr, &prev->dcrs, list)
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if (memcmp(nfit_dcr->dcr, dcr, length) == 0) {
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list_move_tail(&nfit_dcr->list, &acpi_desc->dcrs);
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return true;
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}
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nfit_dcr = devm_kzalloc(dev, sizeof(*nfit_dcr), GFP_KERNEL);
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if (!nfit_dcr)
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return false;
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INIT_LIST_HEAD(&nfit_dcr->list);
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nfit_dcr->dcr = dcr;
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list_add_tail(&nfit_dcr->list, &acpi_desc->dcrs);
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dev_dbg(dev, "%s: dcr index: %d windows: %d\n", __func__,
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dcr->region_index, dcr->windows);
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return true;
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}
|
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|
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static bool add_bdw(struct acpi_nfit_desc *acpi_desc,
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struct nfit_table_prev *prev,
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struct acpi_nfit_data_region *bdw)
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{
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size_t length = min_t(size_t, sizeof(*bdw), bdw->header.length);
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struct device *dev = acpi_desc->dev;
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struct nfit_bdw *nfit_bdw;
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list_for_each_entry(nfit_bdw, &prev->bdws, list)
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if (memcmp(nfit_bdw->bdw, bdw, length) == 0) {
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list_move_tail(&nfit_bdw->list, &acpi_desc->bdws);
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return true;
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}
|
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|
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nfit_bdw = devm_kzalloc(dev, sizeof(*nfit_bdw), GFP_KERNEL);
|
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if (!nfit_bdw)
|
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return false;
|
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INIT_LIST_HEAD(&nfit_bdw->list);
|
|
nfit_bdw->bdw = bdw;
|
|
list_add_tail(&nfit_bdw->list, &acpi_desc->bdws);
|
|
dev_dbg(dev, "%s: bdw dcr: %d windows: %d\n", __func__,
|
|
bdw->region_index, bdw->windows);
|
|
return true;
|
|
}
|
|
|
|
static bool add_idt(struct acpi_nfit_desc *acpi_desc,
|
|
struct nfit_table_prev *prev,
|
|
struct acpi_nfit_interleave *idt)
|
|
{
|
|
size_t length = min_t(size_t, sizeof(*idt), idt->header.length);
|
|
struct device *dev = acpi_desc->dev;
|
|
struct nfit_idt *nfit_idt;
|
|
|
|
list_for_each_entry(nfit_idt, &prev->idts, list)
|
|
if (memcmp(nfit_idt->idt, idt, length) == 0) {
|
|
list_move_tail(&nfit_idt->list, &acpi_desc->idts);
|
|
return true;
|
|
}
|
|
|
|
nfit_idt = devm_kzalloc(dev, sizeof(*nfit_idt), GFP_KERNEL);
|
|
if (!nfit_idt)
|
|
return false;
|
|
INIT_LIST_HEAD(&nfit_idt->list);
|
|
nfit_idt->idt = idt;
|
|
list_add_tail(&nfit_idt->list, &acpi_desc->idts);
|
|
dev_dbg(dev, "%s: idt index: %d num_lines: %d\n", __func__,
|
|
idt->interleave_index, idt->line_count);
|
|
return true;
|
|
}
|
|
|
|
static bool add_flush(struct acpi_nfit_desc *acpi_desc,
|
|
struct nfit_table_prev *prev,
|
|
struct acpi_nfit_flush_address *flush)
|
|
{
|
|
size_t length = min_t(size_t, sizeof(*flush), flush->header.length);
|
|
struct device *dev = acpi_desc->dev;
|
|
struct nfit_flush *nfit_flush;
|
|
|
|
list_for_each_entry(nfit_flush, &prev->flushes, list)
|
|
if (memcmp(nfit_flush->flush, flush, length) == 0) {
|
|
list_move_tail(&nfit_flush->list, &acpi_desc->flushes);
|
|
return true;
|
|
}
|
|
|
|
nfit_flush = devm_kzalloc(dev, sizeof(*nfit_flush), GFP_KERNEL);
|
|
if (!nfit_flush)
|
|
return false;
|
|
INIT_LIST_HEAD(&nfit_flush->list);
|
|
nfit_flush->flush = flush;
|
|
list_add_tail(&nfit_flush->list, &acpi_desc->flushes);
|
|
dev_dbg(dev, "%s: nfit_flush handle: %d hint_count: %d\n", __func__,
|
|
flush->device_handle, flush->hint_count);
|
|
return true;
|
|
}
|
|
|
|
static void *add_table(struct acpi_nfit_desc *acpi_desc,
|
|
struct nfit_table_prev *prev, void *table, const void *end)
|
|
{
|
|
struct device *dev = acpi_desc->dev;
|
|
struct acpi_nfit_header *hdr;
|
|
void *err = ERR_PTR(-ENOMEM);
|
|
|
|
if (table >= end)
|
|
return NULL;
|
|
|
|
hdr = table;
|
|
if (!hdr->length) {
|
|
dev_warn(dev, "found a zero length table '%d' parsing nfit\n",
|
|
hdr->type);
|
|
return NULL;
|
|
}
|
|
|
|
switch (hdr->type) {
|
|
case ACPI_NFIT_TYPE_SYSTEM_ADDRESS:
|
|
if (!add_spa(acpi_desc, prev, table))
|
|
return err;
|
|
break;
|
|
case ACPI_NFIT_TYPE_MEMORY_MAP:
|
|
if (!add_memdev(acpi_desc, prev, table))
|
|
return err;
|
|
break;
|
|
case ACPI_NFIT_TYPE_CONTROL_REGION:
|
|
if (!add_dcr(acpi_desc, prev, table))
|
|
return err;
|
|
break;
|
|
case ACPI_NFIT_TYPE_DATA_REGION:
|
|
if (!add_bdw(acpi_desc, prev, table))
|
|
return err;
|
|
break;
|
|
case ACPI_NFIT_TYPE_INTERLEAVE:
|
|
if (!add_idt(acpi_desc, prev, table))
|
|
return err;
|
|
break;
|
|
case ACPI_NFIT_TYPE_FLUSH_ADDRESS:
|
|
if (!add_flush(acpi_desc, prev, table))
|
|
return err;
|
|
break;
|
|
case ACPI_NFIT_TYPE_SMBIOS:
|
|
dev_dbg(dev, "%s: smbios\n", __func__);
|
|
break;
|
|
default:
|
|
dev_err(dev, "unknown table '%d' parsing nfit\n", hdr->type);
|
|
break;
|
|
}
|
|
|
|
return table + hdr->length;
|
|
}
|
|
|
|
static void nfit_mem_find_spa_bdw(struct acpi_nfit_desc *acpi_desc,
|
|
struct nfit_mem *nfit_mem)
|
|
{
|
|
u32 device_handle = __to_nfit_memdev(nfit_mem)->device_handle;
|
|
u16 dcr = nfit_mem->dcr->region_index;
|
|
struct nfit_spa *nfit_spa;
|
|
|
|
list_for_each_entry(nfit_spa, &acpi_desc->spas, list) {
|
|
u16 range_index = nfit_spa->spa->range_index;
|
|
int type = nfit_spa_type(nfit_spa->spa);
|
|
struct nfit_memdev *nfit_memdev;
|
|
|
|
if (type != NFIT_SPA_BDW)
|
|
continue;
|
|
|
|
list_for_each_entry(nfit_memdev, &acpi_desc->memdevs, list) {
|
|
if (nfit_memdev->memdev->range_index != range_index)
|
|
continue;
|
|
if (nfit_memdev->memdev->device_handle != device_handle)
|
|
continue;
|
|
if (nfit_memdev->memdev->region_index != dcr)
|
|
continue;
|
|
|
|
nfit_mem->spa_bdw = nfit_spa->spa;
|
|
return;
|
|
}
|
|
}
|
|
|
|
dev_dbg(acpi_desc->dev, "SPA-BDW not found for SPA-DCR %d\n",
|
|
nfit_mem->spa_dcr->range_index);
|
|
nfit_mem->bdw = NULL;
|
|
}
|
|
|
|
static void nfit_mem_init_bdw(struct acpi_nfit_desc *acpi_desc,
|
|
struct nfit_mem *nfit_mem, struct acpi_nfit_system_address *spa)
|
|
{
|
|
u16 dcr = __to_nfit_memdev(nfit_mem)->region_index;
|
|
struct nfit_memdev *nfit_memdev;
|
|
struct nfit_flush *nfit_flush;
|
|
struct nfit_bdw *nfit_bdw;
|
|
struct nfit_idt *nfit_idt;
|
|
u16 idt_idx, range_index;
|
|
|
|
list_for_each_entry(nfit_bdw, &acpi_desc->bdws, list) {
|
|
if (nfit_bdw->bdw->region_index != dcr)
|
|
continue;
|
|
nfit_mem->bdw = nfit_bdw->bdw;
|
|
break;
|
|
}
|
|
|
|
if (!nfit_mem->bdw)
|
|
return;
|
|
|
|
nfit_mem_find_spa_bdw(acpi_desc, nfit_mem);
|
|
|
|
if (!nfit_mem->spa_bdw)
|
|
return;
|
|
|
|
range_index = nfit_mem->spa_bdw->range_index;
|
|
list_for_each_entry(nfit_memdev, &acpi_desc->memdevs, list) {
|
|
if (nfit_memdev->memdev->range_index != range_index ||
|
|
nfit_memdev->memdev->region_index != dcr)
|
|
continue;
|
|
nfit_mem->memdev_bdw = nfit_memdev->memdev;
|
|
idt_idx = nfit_memdev->memdev->interleave_index;
|
|
list_for_each_entry(nfit_idt, &acpi_desc->idts, list) {
|
|
if (nfit_idt->idt->interleave_index != idt_idx)
|
|
continue;
|
|
nfit_mem->idt_bdw = nfit_idt->idt;
|
|
break;
|
|
}
|
|
|
|
list_for_each_entry(nfit_flush, &acpi_desc->flushes, list) {
|
|
if (nfit_flush->flush->device_handle !=
|
|
nfit_memdev->memdev->device_handle)
|
|
continue;
|
|
nfit_mem->nfit_flush = nfit_flush;
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int nfit_mem_dcr_init(struct acpi_nfit_desc *acpi_desc,
|
|
struct acpi_nfit_system_address *spa)
|
|
{
|
|
struct nfit_mem *nfit_mem, *found;
|
|
struct nfit_memdev *nfit_memdev;
|
|
int type = nfit_spa_type(spa);
|
|
|
|
switch (type) {
|
|
case NFIT_SPA_DCR:
|
|
case NFIT_SPA_PM:
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
|
|
list_for_each_entry(nfit_memdev, &acpi_desc->memdevs, list) {
|
|
struct nfit_dcr *nfit_dcr;
|
|
u32 device_handle;
|
|
u16 dcr;
|
|
|
|
if (nfit_memdev->memdev->range_index != spa->range_index)
|
|
continue;
|
|
found = NULL;
|
|
dcr = nfit_memdev->memdev->region_index;
|
|
device_handle = nfit_memdev->memdev->device_handle;
|
|
list_for_each_entry(nfit_mem, &acpi_desc->dimms, list)
|
|
if (__to_nfit_memdev(nfit_mem)->device_handle
|
|
== device_handle) {
|
|
found = nfit_mem;
|
|
break;
|
|
}
|
|
|
|
if (found)
|
|
nfit_mem = found;
|
|
else {
|
|
nfit_mem = devm_kzalloc(acpi_desc->dev,
|
|
sizeof(*nfit_mem), GFP_KERNEL);
|
|
if (!nfit_mem)
|
|
return -ENOMEM;
|
|
INIT_LIST_HEAD(&nfit_mem->list);
|
|
nfit_mem->acpi_desc = acpi_desc;
|
|
list_add(&nfit_mem->list, &acpi_desc->dimms);
|
|
}
|
|
|
|
list_for_each_entry(nfit_dcr, &acpi_desc->dcrs, list) {
|
|
if (nfit_dcr->dcr->region_index != dcr)
|
|
continue;
|
|
/*
|
|
* Record the control region for the dimm. For
|
|
* the ACPI 6.1 case, where there are separate
|
|
* control regions for the pmem vs blk
|
|
* interfaces, be sure to record the extended
|
|
* blk details.
|
|
*/
|
|
if (!nfit_mem->dcr)
|
|
nfit_mem->dcr = nfit_dcr->dcr;
|
|
else if (nfit_mem->dcr->windows == 0
|
|
&& nfit_dcr->dcr->windows)
|
|
nfit_mem->dcr = nfit_dcr->dcr;
|
|
break;
|
|
}
|
|
|
|
if (dcr && !nfit_mem->dcr) {
|
|
dev_err(acpi_desc->dev, "SPA %d missing DCR %d\n",
|
|
spa->range_index, dcr);
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (type == NFIT_SPA_DCR) {
|
|
struct nfit_idt *nfit_idt;
|
|
u16 idt_idx;
|
|
|
|
/* multiple dimms may share a SPA when interleaved */
|
|
nfit_mem->spa_dcr = spa;
|
|
nfit_mem->memdev_dcr = nfit_memdev->memdev;
|
|
idt_idx = nfit_memdev->memdev->interleave_index;
|
|
list_for_each_entry(nfit_idt, &acpi_desc->idts, list) {
|
|
if (nfit_idt->idt->interleave_index != idt_idx)
|
|
continue;
|
|
nfit_mem->idt_dcr = nfit_idt->idt;
|
|
break;
|
|
}
|
|
nfit_mem_init_bdw(acpi_desc, nfit_mem, spa);
|
|
} else {
|
|
/*
|
|
* A single dimm may belong to multiple SPA-PM
|
|
* ranges, record at least one in addition to
|
|
* any SPA-DCR range.
|
|
*/
|
|
nfit_mem->memdev_pmem = nfit_memdev->memdev;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int nfit_mem_cmp(void *priv, struct list_head *_a, struct list_head *_b)
|
|
{
|
|
struct nfit_mem *a = container_of(_a, typeof(*a), list);
|
|
struct nfit_mem *b = container_of(_b, typeof(*b), list);
|
|
u32 handleA, handleB;
|
|
|
|
handleA = __to_nfit_memdev(a)->device_handle;
|
|
handleB = __to_nfit_memdev(b)->device_handle;
|
|
if (handleA < handleB)
|
|
return -1;
|
|
else if (handleA > handleB)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
static int nfit_mem_init(struct acpi_nfit_desc *acpi_desc)
|
|
{
|
|
struct nfit_spa *nfit_spa;
|
|
|
|
/*
|
|
* For each SPA-DCR or SPA-PMEM address range find its
|
|
* corresponding MEMDEV(s). From each MEMDEV find the
|
|
* corresponding DCR. Then, if we're operating on a SPA-DCR,
|
|
* try to find a SPA-BDW and a corresponding BDW that references
|
|
* the DCR. Throw it all into an nfit_mem object. Note, that
|
|
* BDWs are optional.
|
|
*/
|
|
list_for_each_entry(nfit_spa, &acpi_desc->spas, list) {
|
|
int rc;
|
|
|
|
rc = nfit_mem_dcr_init(acpi_desc, nfit_spa->spa);
|
|
if (rc)
|
|
return rc;
|
|
}
|
|
|
|
list_sort(NULL, &acpi_desc->dimms, nfit_mem_cmp);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t revision_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct nvdimm_bus *nvdimm_bus = to_nvdimm_bus(dev);
|
|
struct nvdimm_bus_descriptor *nd_desc = to_nd_desc(nvdimm_bus);
|
|
struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
|
|
|
|
return sprintf(buf, "%d\n", acpi_desc->acpi_header.revision);
|
|
}
|
|
static DEVICE_ATTR_RO(revision);
|
|
|
|
static struct attribute *acpi_nfit_attributes[] = {
|
|
&dev_attr_revision.attr,
|
|
NULL,
|
|
};
|
|
|
|
static struct attribute_group acpi_nfit_attribute_group = {
|
|
.name = "nfit",
|
|
.attrs = acpi_nfit_attributes,
|
|
};
|
|
|
|
static const struct attribute_group *acpi_nfit_attribute_groups[] = {
|
|
&nvdimm_bus_attribute_group,
|
|
&acpi_nfit_attribute_group,
|
|
NULL,
|
|
};
|
|
|
|
static struct acpi_nfit_memory_map *to_nfit_memdev(struct device *dev)
|
|
{
|
|
struct nvdimm *nvdimm = to_nvdimm(dev);
|
|
struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
|
|
|
|
return __to_nfit_memdev(nfit_mem);
|
|
}
|
|
|
|
static struct acpi_nfit_control_region *to_nfit_dcr(struct device *dev)
|
|
{
|
|
struct nvdimm *nvdimm = to_nvdimm(dev);
|
|
struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
|
|
|
|
return nfit_mem->dcr;
|
|
}
|
|
|
|
static ssize_t handle_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct acpi_nfit_memory_map *memdev = to_nfit_memdev(dev);
|
|
|
|
return sprintf(buf, "%#x\n", memdev->device_handle);
|
|
}
|
|
static DEVICE_ATTR_RO(handle);
|
|
|
|
static ssize_t phys_id_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct acpi_nfit_memory_map *memdev = to_nfit_memdev(dev);
|
|
|
|
return sprintf(buf, "%#x\n", memdev->physical_id);
|
|
}
|
|
static DEVICE_ATTR_RO(phys_id);
|
|
|
|
static ssize_t vendor_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev);
|
|
|
|
return sprintf(buf, "0x%04x\n", be16_to_cpu(dcr->vendor_id));
|
|
}
|
|
static DEVICE_ATTR_RO(vendor);
|
|
|
|
static ssize_t rev_id_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev);
|
|
|
|
return sprintf(buf, "0x%04x\n", be16_to_cpu(dcr->revision_id));
|
|
}
|
|
static DEVICE_ATTR_RO(rev_id);
|
|
|
|
static ssize_t device_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev);
|
|
|
|
return sprintf(buf, "0x%04x\n", be16_to_cpu(dcr->device_id));
|
|
}
|
|
static DEVICE_ATTR_RO(device);
|
|
|
|
static ssize_t subsystem_vendor_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev);
|
|
|
|
return sprintf(buf, "0x%04x\n", be16_to_cpu(dcr->subsystem_vendor_id));
|
|
}
|
|
static DEVICE_ATTR_RO(subsystem_vendor);
|
|
|
|
static ssize_t subsystem_rev_id_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev);
|
|
|
|
return sprintf(buf, "0x%04x\n",
|
|
be16_to_cpu(dcr->subsystem_revision_id));
|
|
}
|
|
static DEVICE_ATTR_RO(subsystem_rev_id);
|
|
|
|
static ssize_t subsystem_device_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev);
|
|
|
|
return sprintf(buf, "0x%04x\n", be16_to_cpu(dcr->subsystem_device_id));
|
|
}
|
|
static DEVICE_ATTR_RO(subsystem_device);
|
|
|
|
static int num_nvdimm_formats(struct nvdimm *nvdimm)
|
|
{
|
|
struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
|
|
int formats = 0;
|
|
|
|
if (nfit_mem->memdev_pmem)
|
|
formats++;
|
|
if (nfit_mem->memdev_bdw)
|
|
formats++;
|
|
return formats;
|
|
}
|
|
|
|
static ssize_t format_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev);
|
|
|
|
return sprintf(buf, "0x%04x\n", be16_to_cpu(dcr->code));
|
|
}
|
|
static DEVICE_ATTR_RO(format);
|
|
|
|
static ssize_t format1_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
u32 handle;
|
|
ssize_t rc = -ENXIO;
|
|
struct nfit_mem *nfit_mem;
|
|
struct nfit_memdev *nfit_memdev;
|
|
struct acpi_nfit_desc *acpi_desc;
|
|
struct nvdimm *nvdimm = to_nvdimm(dev);
|
|
struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev);
|
|
|
|
nfit_mem = nvdimm_provider_data(nvdimm);
|
|
acpi_desc = nfit_mem->acpi_desc;
|
|
handle = to_nfit_memdev(dev)->device_handle;
|
|
|
|
/* assumes DIMMs have at most 2 published interface codes */
|
|
mutex_lock(&acpi_desc->init_mutex);
|
|
list_for_each_entry(nfit_memdev, &acpi_desc->memdevs, list) {
|
|
struct acpi_nfit_memory_map *memdev = nfit_memdev->memdev;
|
|
struct nfit_dcr *nfit_dcr;
|
|
|
|
if (memdev->device_handle != handle)
|
|
continue;
|
|
|
|
list_for_each_entry(nfit_dcr, &acpi_desc->dcrs, list) {
|
|
if (nfit_dcr->dcr->region_index != memdev->region_index)
|
|
continue;
|
|
if (nfit_dcr->dcr->code == dcr->code)
|
|
continue;
|
|
rc = sprintf(buf, "%#x\n",
|
|
be16_to_cpu(nfit_dcr->dcr->code));
|
|
break;
|
|
}
|
|
if (rc != ENXIO)
|
|
break;
|
|
}
|
|
mutex_unlock(&acpi_desc->init_mutex);
|
|
return rc;
|
|
}
|
|
static DEVICE_ATTR_RO(format1);
|
|
|
|
static ssize_t formats_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct nvdimm *nvdimm = to_nvdimm(dev);
|
|
|
|
return sprintf(buf, "%d\n", num_nvdimm_formats(nvdimm));
|
|
}
|
|
static DEVICE_ATTR_RO(formats);
|
|
|
|
static ssize_t serial_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev);
|
|
|
|
return sprintf(buf, "0x%08x\n", be32_to_cpu(dcr->serial_number));
|
|
}
|
|
static DEVICE_ATTR_RO(serial);
|
|
|
|
static ssize_t family_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct nvdimm *nvdimm = to_nvdimm(dev);
|
|
struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
|
|
|
|
if (nfit_mem->family < 0)
|
|
return -ENXIO;
|
|
return sprintf(buf, "%d\n", nfit_mem->family);
|
|
}
|
|
static DEVICE_ATTR_RO(family);
|
|
|
|
static ssize_t dsm_mask_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct nvdimm *nvdimm = to_nvdimm(dev);
|
|
struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
|
|
|
|
if (nfit_mem->family < 0)
|
|
return -ENXIO;
|
|
return sprintf(buf, "%#lx\n", nfit_mem->dsm_mask);
|
|
}
|
|
static DEVICE_ATTR_RO(dsm_mask);
|
|
|
|
static ssize_t flags_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
u16 flags = to_nfit_memdev(dev)->flags;
|
|
|
|
return sprintf(buf, "%s%s%s%s%s\n",
|
|
flags & ACPI_NFIT_MEM_SAVE_FAILED ? "save_fail " : "",
|
|
flags & ACPI_NFIT_MEM_RESTORE_FAILED ? "restore_fail " : "",
|
|
flags & ACPI_NFIT_MEM_FLUSH_FAILED ? "flush_fail " : "",
|
|
flags & ACPI_NFIT_MEM_NOT_ARMED ? "not_armed " : "",
|
|
flags & ACPI_NFIT_MEM_HEALTH_OBSERVED ? "smart_event " : "");
|
|
}
|
|
static DEVICE_ATTR_RO(flags);
|
|
|
|
static ssize_t id_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev);
|
|
|
|
if (dcr->valid_fields & ACPI_NFIT_CONTROL_MFG_INFO_VALID)
|
|
return sprintf(buf, "%04x-%02x-%04x-%08x\n",
|
|
be16_to_cpu(dcr->vendor_id),
|
|
dcr->manufacturing_location,
|
|
be16_to_cpu(dcr->manufacturing_date),
|
|
be32_to_cpu(dcr->serial_number));
|
|
else
|
|
return sprintf(buf, "%04x-%08x\n",
|
|
be16_to_cpu(dcr->vendor_id),
|
|
be32_to_cpu(dcr->serial_number));
|
|
}
|
|
static DEVICE_ATTR_RO(id);
|
|
|
|
static struct attribute *acpi_nfit_dimm_attributes[] = {
|
|
&dev_attr_handle.attr,
|
|
&dev_attr_phys_id.attr,
|
|
&dev_attr_vendor.attr,
|
|
&dev_attr_device.attr,
|
|
&dev_attr_rev_id.attr,
|
|
&dev_attr_subsystem_vendor.attr,
|
|
&dev_attr_subsystem_device.attr,
|
|
&dev_attr_subsystem_rev_id.attr,
|
|
&dev_attr_format.attr,
|
|
&dev_attr_formats.attr,
|
|
&dev_attr_format1.attr,
|
|
&dev_attr_serial.attr,
|
|
&dev_attr_flags.attr,
|
|
&dev_attr_id.attr,
|
|
&dev_attr_family.attr,
|
|
&dev_attr_dsm_mask.attr,
|
|
NULL,
|
|
};
|
|
|
|
static umode_t acpi_nfit_dimm_attr_visible(struct kobject *kobj,
|
|
struct attribute *a, int n)
|
|
{
|
|
struct device *dev = container_of(kobj, struct device, kobj);
|
|
struct nvdimm *nvdimm = to_nvdimm(dev);
|
|
|
|
if (!to_nfit_dcr(dev))
|
|
return 0;
|
|
if (a == &dev_attr_format1.attr && num_nvdimm_formats(nvdimm) <= 1)
|
|
return 0;
|
|
return a->mode;
|
|
}
|
|
|
|
static struct attribute_group acpi_nfit_dimm_attribute_group = {
|
|
.name = "nfit",
|
|
.attrs = acpi_nfit_dimm_attributes,
|
|
.is_visible = acpi_nfit_dimm_attr_visible,
|
|
};
|
|
|
|
static const struct attribute_group *acpi_nfit_dimm_attribute_groups[] = {
|
|
&nvdimm_attribute_group,
|
|
&nd_device_attribute_group,
|
|
&acpi_nfit_dimm_attribute_group,
|
|
NULL,
|
|
};
|
|
|
|
static struct nvdimm *acpi_nfit_dimm_by_handle(struct acpi_nfit_desc *acpi_desc,
|
|
u32 device_handle)
|
|
{
|
|
struct nfit_mem *nfit_mem;
|
|
|
|
list_for_each_entry(nfit_mem, &acpi_desc->dimms, list)
|
|
if (__to_nfit_memdev(nfit_mem)->device_handle == device_handle)
|
|
return nfit_mem->nvdimm;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static int acpi_nfit_add_dimm(struct acpi_nfit_desc *acpi_desc,
|
|
struct nfit_mem *nfit_mem, u32 device_handle)
|
|
{
|
|
struct acpi_device *adev, *adev_dimm;
|
|
struct device *dev = acpi_desc->dev;
|
|
unsigned long dsm_mask;
|
|
const u8 *uuid;
|
|
int i;
|
|
|
|
/* nfit test assumes 1:1 relationship between commands and dsms */
|
|
nfit_mem->dsm_mask = acpi_desc->dimm_cmd_force_en;
|
|
nfit_mem->family = NVDIMM_FAMILY_INTEL;
|
|
adev = to_acpi_dev(acpi_desc);
|
|
if (!adev)
|
|
return 0;
|
|
|
|
adev_dimm = acpi_find_child_device(adev, device_handle, false);
|
|
nfit_mem->adev = adev_dimm;
|
|
if (!adev_dimm) {
|
|
dev_err(dev, "no ACPI.NFIT device with _ADR %#x, disabling...\n",
|
|
device_handle);
|
|
return force_enable_dimms ? 0 : -ENODEV;
|
|
}
|
|
|
|
/*
|
|
* Until standardization materializes we need to consider up to 3
|
|
* different command sets. Note, that checking for function0 (bit0)
|
|
* tells us if any commands are reachable through this uuid.
|
|
*/
|
|
for (i = NVDIMM_FAMILY_INTEL; i <= NVDIMM_FAMILY_HPE2; i++)
|
|
if (acpi_check_dsm(adev_dimm->handle, to_nfit_uuid(i), 1, 1))
|
|
break;
|
|
|
|
/* limit the supported commands to those that are publicly documented */
|
|
nfit_mem->family = i;
|
|
if (nfit_mem->family == NVDIMM_FAMILY_INTEL) {
|
|
dsm_mask = 0x3fe;
|
|
if (disable_vendor_specific)
|
|
dsm_mask &= ~(1 << ND_CMD_VENDOR);
|
|
} else if (nfit_mem->family == NVDIMM_FAMILY_HPE1)
|
|
dsm_mask = 0x1c3c76;
|
|
else if (nfit_mem->family == NVDIMM_FAMILY_HPE2) {
|
|
dsm_mask = 0x1fe;
|
|
if (disable_vendor_specific)
|
|
dsm_mask &= ~(1 << 8);
|
|
} else {
|
|
dev_err(dev, "unknown dimm command family\n");
|
|
nfit_mem->family = -1;
|
|
return force_enable_dimms ? 0 : -ENODEV;
|
|
}
|
|
|
|
uuid = to_nfit_uuid(nfit_mem->family);
|
|
for_each_set_bit(i, &dsm_mask, BITS_PER_LONG)
|
|
if (acpi_check_dsm(adev_dimm->handle, uuid, 1, 1ULL << i))
|
|
set_bit(i, &nfit_mem->dsm_mask);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_nfit_register_dimms(struct acpi_nfit_desc *acpi_desc)
|
|
{
|
|
struct nfit_mem *nfit_mem;
|
|
int dimm_count = 0;
|
|
|
|
list_for_each_entry(nfit_mem, &acpi_desc->dimms, list) {
|
|
unsigned long flags = 0, cmd_mask;
|
|
struct nvdimm *nvdimm;
|
|
u32 device_handle;
|
|
u16 mem_flags;
|
|
int rc;
|
|
|
|
device_handle = __to_nfit_memdev(nfit_mem)->device_handle;
|
|
nvdimm = acpi_nfit_dimm_by_handle(acpi_desc, device_handle);
|
|
if (nvdimm) {
|
|
dimm_count++;
|
|
continue;
|
|
}
|
|
|
|
if (nfit_mem->bdw && nfit_mem->memdev_pmem)
|
|
flags |= NDD_ALIASING;
|
|
|
|
mem_flags = __to_nfit_memdev(nfit_mem)->flags;
|
|
if (mem_flags & ACPI_NFIT_MEM_NOT_ARMED)
|
|
flags |= NDD_UNARMED;
|
|
|
|
rc = acpi_nfit_add_dimm(acpi_desc, nfit_mem, device_handle);
|
|
if (rc)
|
|
continue;
|
|
|
|
/*
|
|
* TODO: provide translation for non-NVDIMM_FAMILY_INTEL
|
|
* devices (i.e. from nd_cmd to acpi_dsm) to standardize the
|
|
* userspace interface.
|
|
*/
|
|
cmd_mask = 1UL << ND_CMD_CALL;
|
|
if (nfit_mem->family == NVDIMM_FAMILY_INTEL)
|
|
cmd_mask |= nfit_mem->dsm_mask;
|
|
|
|
nvdimm = nvdimm_create(acpi_desc->nvdimm_bus, nfit_mem,
|
|
acpi_nfit_dimm_attribute_groups,
|
|
flags, cmd_mask);
|
|
if (!nvdimm)
|
|
return -ENOMEM;
|
|
|
|
nfit_mem->nvdimm = nvdimm;
|
|
dimm_count++;
|
|
|
|
if ((mem_flags & ACPI_NFIT_MEM_FAILED_MASK) == 0)
|
|
continue;
|
|
|
|
dev_info(acpi_desc->dev, "%s flags:%s%s%s%s\n",
|
|
nvdimm_name(nvdimm),
|
|
mem_flags & ACPI_NFIT_MEM_SAVE_FAILED ? " save_fail" : "",
|
|
mem_flags & ACPI_NFIT_MEM_RESTORE_FAILED ? " restore_fail":"",
|
|
mem_flags & ACPI_NFIT_MEM_FLUSH_FAILED ? " flush_fail" : "",
|
|
mem_flags & ACPI_NFIT_MEM_NOT_ARMED ? " not_armed" : "");
|
|
|
|
}
|
|
|
|
return nvdimm_bus_check_dimm_count(acpi_desc->nvdimm_bus, dimm_count);
|
|
}
|
|
|
|
static void acpi_nfit_init_dsms(struct acpi_nfit_desc *acpi_desc)
|
|
{
|
|
struct nvdimm_bus_descriptor *nd_desc = &acpi_desc->nd_desc;
|
|
const u8 *uuid = to_nfit_uuid(NFIT_DEV_BUS);
|
|
struct acpi_device *adev;
|
|
int i;
|
|
|
|
nd_desc->cmd_mask = acpi_desc->bus_cmd_force_en;
|
|
adev = to_acpi_dev(acpi_desc);
|
|
if (!adev)
|
|
return;
|
|
|
|
for (i = ND_CMD_ARS_CAP; i <= ND_CMD_CLEAR_ERROR; i++)
|
|
if (acpi_check_dsm(adev->handle, uuid, 1, 1ULL << i))
|
|
set_bit(i, &nd_desc->cmd_mask);
|
|
}
|
|
|
|
static ssize_t range_index_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct nd_region *nd_region = to_nd_region(dev);
|
|
struct nfit_spa *nfit_spa = nd_region_provider_data(nd_region);
|
|
|
|
return sprintf(buf, "%d\n", nfit_spa->spa->range_index);
|
|
}
|
|
static DEVICE_ATTR_RO(range_index);
|
|
|
|
static struct attribute *acpi_nfit_region_attributes[] = {
|
|
&dev_attr_range_index.attr,
|
|
NULL,
|
|
};
|
|
|
|
static struct attribute_group acpi_nfit_region_attribute_group = {
|
|
.name = "nfit",
|
|
.attrs = acpi_nfit_region_attributes,
|
|
};
|
|
|
|
static const struct attribute_group *acpi_nfit_region_attribute_groups[] = {
|
|
&nd_region_attribute_group,
|
|
&nd_mapping_attribute_group,
|
|
&nd_device_attribute_group,
|
|
&nd_numa_attribute_group,
|
|
&acpi_nfit_region_attribute_group,
|
|
NULL,
|
|
};
|
|
|
|
/* enough info to uniquely specify an interleave set */
|
|
struct nfit_set_info {
|
|
struct nfit_set_info_map {
|
|
u64 region_offset;
|
|
u32 serial_number;
|
|
u32 pad;
|
|
} mapping[0];
|
|
};
|
|
|
|
static size_t sizeof_nfit_set_info(int num_mappings)
|
|
{
|
|
return sizeof(struct nfit_set_info)
|
|
+ num_mappings * sizeof(struct nfit_set_info_map);
|
|
}
|
|
|
|
static int cmp_map(const void *m0, const void *m1)
|
|
{
|
|
const struct nfit_set_info_map *map0 = m0;
|
|
const struct nfit_set_info_map *map1 = m1;
|
|
|
|
return memcmp(&map0->region_offset, &map1->region_offset,
|
|
sizeof(u64));
|
|
}
|
|
|
|
/* Retrieve the nth entry referencing this spa */
|
|
static struct acpi_nfit_memory_map *memdev_from_spa(
|
|
struct acpi_nfit_desc *acpi_desc, u16 range_index, int n)
|
|
{
|
|
struct nfit_memdev *nfit_memdev;
|
|
|
|
list_for_each_entry(nfit_memdev, &acpi_desc->memdevs, list)
|
|
if (nfit_memdev->memdev->range_index == range_index)
|
|
if (n-- == 0)
|
|
return nfit_memdev->memdev;
|
|
return NULL;
|
|
}
|
|
|
|
static int acpi_nfit_init_interleave_set(struct acpi_nfit_desc *acpi_desc,
|
|
struct nd_region_desc *ndr_desc,
|
|
struct acpi_nfit_system_address *spa)
|
|
{
|
|
int i, spa_type = nfit_spa_type(spa);
|
|
struct device *dev = acpi_desc->dev;
|
|
struct nd_interleave_set *nd_set;
|
|
u16 nr = ndr_desc->num_mappings;
|
|
struct nfit_set_info *info;
|
|
|
|
if (spa_type == NFIT_SPA_PM || spa_type == NFIT_SPA_VOLATILE)
|
|
/* pass */;
|
|
else
|
|
return 0;
|
|
|
|
nd_set = devm_kzalloc(dev, sizeof(*nd_set), GFP_KERNEL);
|
|
if (!nd_set)
|
|
return -ENOMEM;
|
|
|
|
info = devm_kzalloc(dev, sizeof_nfit_set_info(nr), GFP_KERNEL);
|
|
if (!info)
|
|
return -ENOMEM;
|
|
for (i = 0; i < nr; i++) {
|
|
struct nd_mapping *nd_mapping = &ndr_desc->nd_mapping[i];
|
|
struct nfit_set_info_map *map = &info->mapping[i];
|
|
struct nvdimm *nvdimm = nd_mapping->nvdimm;
|
|
struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
|
|
struct acpi_nfit_memory_map *memdev = memdev_from_spa(acpi_desc,
|
|
spa->range_index, i);
|
|
|
|
if (!memdev || !nfit_mem->dcr) {
|
|
dev_err(dev, "%s: failed to find DCR\n", __func__);
|
|
return -ENODEV;
|
|
}
|
|
|
|
map->region_offset = memdev->region_offset;
|
|
map->serial_number = nfit_mem->dcr->serial_number;
|
|
}
|
|
|
|
sort(&info->mapping[0], nr, sizeof(struct nfit_set_info_map),
|
|
cmp_map, NULL);
|
|
nd_set->cookie = nd_fletcher64(info, sizeof_nfit_set_info(nr), 0);
|
|
ndr_desc->nd_set = nd_set;
|
|
devm_kfree(dev, info);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static u64 to_interleave_offset(u64 offset, struct nfit_blk_mmio *mmio)
|
|
{
|
|
struct acpi_nfit_interleave *idt = mmio->idt;
|
|
u32 sub_line_offset, line_index, line_offset;
|
|
u64 line_no, table_skip_count, table_offset;
|
|
|
|
line_no = div_u64_rem(offset, mmio->line_size, &sub_line_offset);
|
|
table_skip_count = div_u64_rem(line_no, mmio->num_lines, &line_index);
|
|
line_offset = idt->line_offset[line_index]
|
|
* mmio->line_size;
|
|
table_offset = table_skip_count * mmio->table_size;
|
|
|
|
return mmio->base_offset + line_offset + table_offset + sub_line_offset;
|
|
}
|
|
|
|
static void wmb_blk(struct nfit_blk *nfit_blk)
|
|
{
|
|
|
|
if (nfit_blk->nvdimm_flush) {
|
|
/*
|
|
* The first wmb() is needed to 'sfence' all previous writes
|
|
* such that they are architecturally visible for the platform
|
|
* buffer flush. Note that we've already arranged for pmem
|
|
* writes to avoid the cache via arch_memcpy_to_pmem(). The
|
|
* final wmb() ensures ordering for the NVDIMM flush write.
|
|
*/
|
|
wmb();
|
|
writeq(1, nfit_blk->nvdimm_flush);
|
|
wmb();
|
|
} else
|
|
wmb_pmem();
|
|
}
|
|
|
|
static u32 read_blk_stat(struct nfit_blk *nfit_blk, unsigned int bw)
|
|
{
|
|
struct nfit_blk_mmio *mmio = &nfit_blk->mmio[DCR];
|
|
u64 offset = nfit_blk->stat_offset + mmio->size * bw;
|
|
|
|
if (mmio->num_lines)
|
|
offset = to_interleave_offset(offset, mmio);
|
|
|
|
return readl(mmio->addr.base + offset);
|
|
}
|
|
|
|
static void write_blk_ctl(struct nfit_blk *nfit_blk, unsigned int bw,
|
|
resource_size_t dpa, unsigned int len, unsigned int write)
|
|
{
|
|
u64 cmd, offset;
|
|
struct nfit_blk_mmio *mmio = &nfit_blk->mmio[DCR];
|
|
|
|
enum {
|
|
BCW_OFFSET_MASK = (1ULL << 48)-1,
|
|
BCW_LEN_SHIFT = 48,
|
|
BCW_LEN_MASK = (1ULL << 8) - 1,
|
|
BCW_CMD_SHIFT = 56,
|
|
};
|
|
|
|
cmd = (dpa >> L1_CACHE_SHIFT) & BCW_OFFSET_MASK;
|
|
len = len >> L1_CACHE_SHIFT;
|
|
cmd |= ((u64) len & BCW_LEN_MASK) << BCW_LEN_SHIFT;
|
|
cmd |= ((u64) write) << BCW_CMD_SHIFT;
|
|
|
|
offset = nfit_blk->cmd_offset + mmio->size * bw;
|
|
if (mmio->num_lines)
|
|
offset = to_interleave_offset(offset, mmio);
|
|
|
|
writeq(cmd, mmio->addr.base + offset);
|
|
wmb_blk(nfit_blk);
|
|
|
|
if (nfit_blk->dimm_flags & NFIT_BLK_DCR_LATCH)
|
|
readq(mmio->addr.base + offset);
|
|
}
|
|
|
|
static int acpi_nfit_blk_single_io(struct nfit_blk *nfit_blk,
|
|
resource_size_t dpa, void *iobuf, size_t len, int rw,
|
|
unsigned int lane)
|
|
{
|
|
struct nfit_blk_mmio *mmio = &nfit_blk->mmio[BDW];
|
|
unsigned int copied = 0;
|
|
u64 base_offset;
|
|
int rc;
|
|
|
|
base_offset = nfit_blk->bdw_offset + dpa % L1_CACHE_BYTES
|
|
+ lane * mmio->size;
|
|
write_blk_ctl(nfit_blk, lane, dpa, len, rw);
|
|
while (len) {
|
|
unsigned int c;
|
|
u64 offset;
|
|
|
|
if (mmio->num_lines) {
|
|
u32 line_offset;
|
|
|
|
offset = to_interleave_offset(base_offset + copied,
|
|
mmio);
|
|
div_u64_rem(offset, mmio->line_size, &line_offset);
|
|
c = min_t(size_t, len, mmio->line_size - line_offset);
|
|
} else {
|
|
offset = base_offset + nfit_blk->bdw_offset;
|
|
c = len;
|
|
}
|
|
|
|
if (rw)
|
|
memcpy_to_pmem(mmio->addr.aperture + offset,
|
|
iobuf + copied, c);
|
|
else {
|
|
if (nfit_blk->dimm_flags & NFIT_BLK_READ_FLUSH)
|
|
mmio_flush_range((void __force *)
|
|
mmio->addr.aperture + offset, c);
|
|
|
|
memcpy_from_pmem(iobuf + copied,
|
|
mmio->addr.aperture + offset, c);
|
|
}
|
|
|
|
copied += c;
|
|
len -= c;
|
|
}
|
|
|
|
if (rw)
|
|
wmb_blk(nfit_blk);
|
|
|
|
rc = read_blk_stat(nfit_blk, lane) ? -EIO : 0;
|
|
return rc;
|
|
}
|
|
|
|
static int acpi_nfit_blk_region_do_io(struct nd_blk_region *ndbr,
|
|
resource_size_t dpa, void *iobuf, u64 len, int rw)
|
|
{
|
|
struct nfit_blk *nfit_blk = nd_blk_region_provider_data(ndbr);
|
|
struct nfit_blk_mmio *mmio = &nfit_blk->mmio[BDW];
|
|
struct nd_region *nd_region = nfit_blk->nd_region;
|
|
unsigned int lane, copied = 0;
|
|
int rc = 0;
|
|
|
|
lane = nd_region_acquire_lane(nd_region);
|
|
while (len) {
|
|
u64 c = min(len, mmio->size);
|
|
|
|
rc = acpi_nfit_blk_single_io(nfit_blk, dpa + copied,
|
|
iobuf + copied, c, rw, lane);
|
|
if (rc)
|
|
break;
|
|
|
|
copied += c;
|
|
len -= c;
|
|
}
|
|
nd_region_release_lane(nd_region, lane);
|
|
|
|
return rc;
|
|
}
|
|
|
|
static void nfit_spa_mapping_release(struct kref *kref)
|
|
{
|
|
struct nfit_spa_mapping *spa_map = to_spa_map(kref);
|
|
struct acpi_nfit_system_address *spa = spa_map->spa;
|
|
struct acpi_nfit_desc *acpi_desc = spa_map->acpi_desc;
|
|
|
|
WARN_ON(!mutex_is_locked(&acpi_desc->spa_map_mutex));
|
|
dev_dbg(acpi_desc->dev, "%s: SPA%d\n", __func__, spa->range_index);
|
|
if (spa_map->type == SPA_MAP_APERTURE)
|
|
memunmap((void __force *)spa_map->addr.aperture);
|
|
else
|
|
iounmap(spa_map->addr.base);
|
|
release_mem_region(spa->address, spa->length);
|
|
list_del(&spa_map->list);
|
|
kfree(spa_map);
|
|
}
|
|
|
|
static struct nfit_spa_mapping *find_spa_mapping(
|
|
struct acpi_nfit_desc *acpi_desc,
|
|
struct acpi_nfit_system_address *spa)
|
|
{
|
|
struct nfit_spa_mapping *spa_map;
|
|
|
|
WARN_ON(!mutex_is_locked(&acpi_desc->spa_map_mutex));
|
|
list_for_each_entry(spa_map, &acpi_desc->spa_maps, list)
|
|
if (spa_map->spa == spa)
|
|
return spa_map;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static void nfit_spa_unmap(struct acpi_nfit_desc *acpi_desc,
|
|
struct acpi_nfit_system_address *spa)
|
|
{
|
|
struct nfit_spa_mapping *spa_map;
|
|
|
|
mutex_lock(&acpi_desc->spa_map_mutex);
|
|
spa_map = find_spa_mapping(acpi_desc, spa);
|
|
|
|
if (spa_map)
|
|
kref_put(&spa_map->kref, nfit_spa_mapping_release);
|
|
mutex_unlock(&acpi_desc->spa_map_mutex);
|
|
}
|
|
|
|
static void __iomem *__nfit_spa_map(struct acpi_nfit_desc *acpi_desc,
|
|
struct acpi_nfit_system_address *spa, enum spa_map_type type)
|
|
{
|
|
resource_size_t start = spa->address;
|
|
resource_size_t n = spa->length;
|
|
struct nfit_spa_mapping *spa_map;
|
|
struct resource *res;
|
|
|
|
WARN_ON(!mutex_is_locked(&acpi_desc->spa_map_mutex));
|
|
|
|
spa_map = find_spa_mapping(acpi_desc, spa);
|
|
if (spa_map) {
|
|
kref_get(&spa_map->kref);
|
|
return spa_map->addr.base;
|
|
}
|
|
|
|
spa_map = kzalloc(sizeof(*spa_map), GFP_KERNEL);
|
|
if (!spa_map)
|
|
return NULL;
|
|
|
|
INIT_LIST_HEAD(&spa_map->list);
|
|
spa_map->spa = spa;
|
|
kref_init(&spa_map->kref);
|
|
spa_map->acpi_desc = acpi_desc;
|
|
|
|
res = request_mem_region(start, n, dev_name(acpi_desc->dev));
|
|
if (!res)
|
|
goto err_mem;
|
|
|
|
spa_map->type = type;
|
|
if (type == SPA_MAP_APERTURE)
|
|
spa_map->addr.aperture = (void __pmem *)memremap(start, n,
|
|
ARCH_MEMREMAP_PMEM);
|
|
else
|
|
spa_map->addr.base = ioremap_nocache(start, n);
|
|
|
|
|
|
if (!spa_map->addr.base)
|
|
goto err_map;
|
|
|
|
list_add_tail(&spa_map->list, &acpi_desc->spa_maps);
|
|
return spa_map->addr.base;
|
|
|
|
err_map:
|
|
release_mem_region(start, n);
|
|
err_mem:
|
|
kfree(spa_map);
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* nfit_spa_map - interleave-aware managed-mappings of acpi_nfit_system_address ranges
|
|
* @nvdimm_bus: NFIT-bus that provided the spa table entry
|
|
* @nfit_spa: spa table to map
|
|
* @type: aperture or control region
|
|
*
|
|
* In the case where block-data-window apertures and
|
|
* dimm-control-regions are interleaved they will end up sharing a
|
|
* single request_mem_region() + ioremap() for the address range. In
|
|
* the style of devm nfit_spa_map() mappings are automatically dropped
|
|
* when all region devices referencing the same mapping are disabled /
|
|
* unbound.
|
|
*/
|
|
static void __iomem *nfit_spa_map(struct acpi_nfit_desc *acpi_desc,
|
|
struct acpi_nfit_system_address *spa, enum spa_map_type type)
|
|
{
|
|
void __iomem *iomem;
|
|
|
|
mutex_lock(&acpi_desc->spa_map_mutex);
|
|
iomem = __nfit_spa_map(acpi_desc, spa, type);
|
|
mutex_unlock(&acpi_desc->spa_map_mutex);
|
|
|
|
return iomem;
|
|
}
|
|
|
|
static int nfit_blk_init_interleave(struct nfit_blk_mmio *mmio,
|
|
struct acpi_nfit_interleave *idt, u16 interleave_ways)
|
|
{
|
|
if (idt) {
|
|
mmio->num_lines = idt->line_count;
|
|
mmio->line_size = idt->line_size;
|
|
if (interleave_ways == 0)
|
|
return -ENXIO;
|
|
mmio->table_size = mmio->num_lines * interleave_ways
|
|
* mmio->line_size;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_nfit_blk_get_flags(struct nvdimm_bus_descriptor *nd_desc,
|
|
struct nvdimm *nvdimm, struct nfit_blk *nfit_blk)
|
|
{
|
|
struct nd_cmd_dimm_flags flags;
|
|
int rc;
|
|
|
|
memset(&flags, 0, sizeof(flags));
|
|
rc = nd_desc->ndctl(nd_desc, nvdimm, ND_CMD_DIMM_FLAGS, &flags,
|
|
sizeof(flags), NULL);
|
|
|
|
if (rc >= 0 && flags.status == 0)
|
|
nfit_blk->dimm_flags = flags.flags;
|
|
else if (rc == -ENOTTY) {
|
|
/* fall back to a conservative default */
|
|
nfit_blk->dimm_flags = NFIT_BLK_DCR_LATCH | NFIT_BLK_READ_FLUSH;
|
|
rc = 0;
|
|
} else
|
|
rc = -ENXIO;
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int acpi_nfit_blk_region_enable(struct nvdimm_bus *nvdimm_bus,
|
|
struct device *dev)
|
|
{
|
|
struct nvdimm_bus_descriptor *nd_desc = to_nd_desc(nvdimm_bus);
|
|
struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
|
|
struct nd_blk_region *ndbr = to_nd_blk_region(dev);
|
|
struct nfit_flush *nfit_flush;
|
|
struct nfit_blk_mmio *mmio;
|
|
struct nfit_blk *nfit_blk;
|
|
struct nfit_mem *nfit_mem;
|
|
struct nvdimm *nvdimm;
|
|
int rc;
|
|
|
|
nvdimm = nd_blk_region_to_dimm(ndbr);
|
|
nfit_mem = nvdimm_provider_data(nvdimm);
|
|
if (!nfit_mem || !nfit_mem->dcr || !nfit_mem->bdw) {
|
|
dev_dbg(dev, "%s: missing%s%s%s\n", __func__,
|
|
nfit_mem ? "" : " nfit_mem",
|
|
(nfit_mem && nfit_mem->dcr) ? "" : " dcr",
|
|
(nfit_mem && nfit_mem->bdw) ? "" : " bdw");
|
|
return -ENXIO;
|
|
}
|
|
|
|
nfit_blk = devm_kzalloc(dev, sizeof(*nfit_blk), GFP_KERNEL);
|
|
if (!nfit_blk)
|
|
return -ENOMEM;
|
|
nd_blk_region_set_provider_data(ndbr, nfit_blk);
|
|
nfit_blk->nd_region = to_nd_region(dev);
|
|
|
|
/* map block aperture memory */
|
|
nfit_blk->bdw_offset = nfit_mem->bdw->offset;
|
|
mmio = &nfit_blk->mmio[BDW];
|
|
mmio->addr.base = nfit_spa_map(acpi_desc, nfit_mem->spa_bdw,
|
|
SPA_MAP_APERTURE);
|
|
if (!mmio->addr.base) {
|
|
dev_dbg(dev, "%s: %s failed to map bdw\n", __func__,
|
|
nvdimm_name(nvdimm));
|
|
return -ENOMEM;
|
|
}
|
|
mmio->size = nfit_mem->bdw->size;
|
|
mmio->base_offset = nfit_mem->memdev_bdw->region_offset;
|
|
mmio->idt = nfit_mem->idt_bdw;
|
|
mmio->spa = nfit_mem->spa_bdw;
|
|
rc = nfit_blk_init_interleave(mmio, nfit_mem->idt_bdw,
|
|
nfit_mem->memdev_bdw->interleave_ways);
|
|
if (rc) {
|
|
dev_dbg(dev, "%s: %s failed to init bdw interleave\n",
|
|
__func__, nvdimm_name(nvdimm));
|
|
return rc;
|
|
}
|
|
|
|
/* map block control memory */
|
|
nfit_blk->cmd_offset = nfit_mem->dcr->command_offset;
|
|
nfit_blk->stat_offset = nfit_mem->dcr->status_offset;
|
|
mmio = &nfit_blk->mmio[DCR];
|
|
mmio->addr.base = nfit_spa_map(acpi_desc, nfit_mem->spa_dcr,
|
|
SPA_MAP_CONTROL);
|
|
if (!mmio->addr.base) {
|
|
dev_dbg(dev, "%s: %s failed to map dcr\n", __func__,
|
|
nvdimm_name(nvdimm));
|
|
return -ENOMEM;
|
|
}
|
|
mmio->size = nfit_mem->dcr->window_size;
|
|
mmio->base_offset = nfit_mem->memdev_dcr->region_offset;
|
|
mmio->idt = nfit_mem->idt_dcr;
|
|
mmio->spa = nfit_mem->spa_dcr;
|
|
rc = nfit_blk_init_interleave(mmio, nfit_mem->idt_dcr,
|
|
nfit_mem->memdev_dcr->interleave_ways);
|
|
if (rc) {
|
|
dev_dbg(dev, "%s: %s failed to init dcr interleave\n",
|
|
__func__, nvdimm_name(nvdimm));
|
|
return rc;
|
|
}
|
|
|
|
rc = acpi_nfit_blk_get_flags(nd_desc, nvdimm, nfit_blk);
|
|
if (rc < 0) {
|
|
dev_dbg(dev, "%s: %s failed get DIMM flags\n",
|
|
__func__, nvdimm_name(nvdimm));
|
|
return rc;
|
|
}
|
|
|
|
nfit_flush = nfit_mem->nfit_flush;
|
|
if (nfit_flush && nfit_flush->flush->hint_count != 0) {
|
|
nfit_blk->nvdimm_flush = devm_ioremap_nocache(dev,
|
|
nfit_flush->flush->hint_address[0], 8);
|
|
if (!nfit_blk->nvdimm_flush)
|
|
return -ENOMEM;
|
|
}
|
|
|
|
if (!arch_has_wmb_pmem() && !nfit_blk->nvdimm_flush)
|
|
dev_warn(dev, "unable to guarantee persistence of writes\n");
|
|
|
|
if (mmio->line_size == 0)
|
|
return 0;
|
|
|
|
if ((u32) nfit_blk->cmd_offset % mmio->line_size
|
|
+ 8 > mmio->line_size) {
|
|
dev_dbg(dev, "cmd_offset crosses interleave boundary\n");
|
|
return -ENXIO;
|
|
} else if ((u32) nfit_blk->stat_offset % mmio->line_size
|
|
+ 8 > mmio->line_size) {
|
|
dev_dbg(dev, "stat_offset crosses interleave boundary\n");
|
|
return -ENXIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void acpi_nfit_blk_region_disable(struct nvdimm_bus *nvdimm_bus,
|
|
struct device *dev)
|
|
{
|
|
struct nvdimm_bus_descriptor *nd_desc = to_nd_desc(nvdimm_bus);
|
|
struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
|
|
struct nd_blk_region *ndbr = to_nd_blk_region(dev);
|
|
struct nfit_blk *nfit_blk = nd_blk_region_provider_data(ndbr);
|
|
int i;
|
|
|
|
if (!nfit_blk)
|
|
return; /* never enabled */
|
|
|
|
/* auto-free BLK spa mappings */
|
|
for (i = 0; i < 2; i++) {
|
|
struct nfit_blk_mmio *mmio = &nfit_blk->mmio[i];
|
|
|
|
if (mmio->addr.base)
|
|
nfit_spa_unmap(acpi_desc, mmio->spa);
|
|
}
|
|
nd_blk_region_set_provider_data(ndbr, NULL);
|
|
/* devm will free nfit_blk */
|
|
}
|
|
|
|
static int ars_get_cap(struct acpi_nfit_desc *acpi_desc,
|
|
struct nd_cmd_ars_cap *cmd, struct nfit_spa *nfit_spa)
|
|
{
|
|
struct nvdimm_bus_descriptor *nd_desc = &acpi_desc->nd_desc;
|
|
struct acpi_nfit_system_address *spa = nfit_spa->spa;
|
|
int cmd_rc, rc;
|
|
|
|
cmd->address = spa->address;
|
|
cmd->length = spa->length;
|
|
rc = nd_desc->ndctl(nd_desc, NULL, ND_CMD_ARS_CAP, cmd,
|
|
sizeof(*cmd), &cmd_rc);
|
|
if (rc < 0)
|
|
return rc;
|
|
return cmd_rc;
|
|
}
|
|
|
|
static int ars_start(struct acpi_nfit_desc *acpi_desc, struct nfit_spa *nfit_spa)
|
|
{
|
|
int rc;
|
|
int cmd_rc;
|
|
struct nd_cmd_ars_start ars_start;
|
|
struct acpi_nfit_system_address *spa = nfit_spa->spa;
|
|
struct nvdimm_bus_descriptor *nd_desc = &acpi_desc->nd_desc;
|
|
|
|
memset(&ars_start, 0, sizeof(ars_start));
|
|
ars_start.address = spa->address;
|
|
ars_start.length = spa->length;
|
|
if (nfit_spa_type(spa) == NFIT_SPA_PM)
|
|
ars_start.type = ND_ARS_PERSISTENT;
|
|
else if (nfit_spa_type(spa) == NFIT_SPA_VOLATILE)
|
|
ars_start.type = ND_ARS_VOLATILE;
|
|
else
|
|
return -ENOTTY;
|
|
|
|
rc = nd_desc->ndctl(nd_desc, NULL, ND_CMD_ARS_START, &ars_start,
|
|
sizeof(ars_start), &cmd_rc);
|
|
|
|
if (rc < 0)
|
|
return rc;
|
|
return cmd_rc;
|
|
}
|
|
|
|
static int ars_continue(struct acpi_nfit_desc *acpi_desc)
|
|
{
|
|
int rc, cmd_rc;
|
|
struct nd_cmd_ars_start ars_start;
|
|
struct nvdimm_bus_descriptor *nd_desc = &acpi_desc->nd_desc;
|
|
struct nd_cmd_ars_status *ars_status = acpi_desc->ars_status;
|
|
|
|
memset(&ars_start, 0, sizeof(ars_start));
|
|
ars_start.address = ars_status->restart_address;
|
|
ars_start.length = ars_status->restart_length;
|
|
ars_start.type = ars_status->type;
|
|
rc = nd_desc->ndctl(nd_desc, NULL, ND_CMD_ARS_START, &ars_start,
|
|
sizeof(ars_start), &cmd_rc);
|
|
if (rc < 0)
|
|
return rc;
|
|
return cmd_rc;
|
|
}
|
|
|
|
static int ars_get_status(struct acpi_nfit_desc *acpi_desc)
|
|
{
|
|
struct nvdimm_bus_descriptor *nd_desc = &acpi_desc->nd_desc;
|
|
struct nd_cmd_ars_status *ars_status = acpi_desc->ars_status;
|
|
int rc, cmd_rc;
|
|
|
|
rc = nd_desc->ndctl(nd_desc, NULL, ND_CMD_ARS_STATUS, ars_status,
|
|
acpi_desc->ars_status_size, &cmd_rc);
|
|
if (rc < 0)
|
|
return rc;
|
|
return cmd_rc;
|
|
}
|
|
|
|
static int ars_status_process_records(struct nvdimm_bus *nvdimm_bus,
|
|
struct nd_cmd_ars_status *ars_status)
|
|
{
|
|
int rc;
|
|
u32 i;
|
|
|
|
for (i = 0; i < ars_status->num_records; i++) {
|
|
rc = nvdimm_bus_add_poison(nvdimm_bus,
|
|
ars_status->records[i].err_address,
|
|
ars_status->records[i].length);
|
|
if (rc)
|
|
return rc;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void acpi_nfit_remove_resource(void *data)
|
|
{
|
|
struct resource *res = data;
|
|
|
|
remove_resource(res);
|
|
}
|
|
|
|
static int acpi_nfit_insert_resource(struct acpi_nfit_desc *acpi_desc,
|
|
struct nd_region_desc *ndr_desc)
|
|
{
|
|
struct resource *res, *nd_res = ndr_desc->res;
|
|
int is_pmem, ret;
|
|
|
|
/* No operation if the region is already registered as PMEM */
|
|
is_pmem = region_intersects(nd_res->start, resource_size(nd_res),
|
|
IORESOURCE_MEM, IORES_DESC_PERSISTENT_MEMORY);
|
|
if (is_pmem == REGION_INTERSECTS)
|
|
return 0;
|
|
|
|
res = devm_kzalloc(acpi_desc->dev, sizeof(*res), GFP_KERNEL);
|
|
if (!res)
|
|
return -ENOMEM;
|
|
|
|
res->name = "Persistent Memory";
|
|
res->start = nd_res->start;
|
|
res->end = nd_res->end;
|
|
res->flags = IORESOURCE_MEM;
|
|
res->desc = IORES_DESC_PERSISTENT_MEMORY;
|
|
|
|
ret = insert_resource(&iomem_resource, res);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = devm_add_action(acpi_desc->dev, acpi_nfit_remove_resource, res);
|
|
if (ret) {
|
|
remove_resource(res);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_nfit_init_mapping(struct acpi_nfit_desc *acpi_desc,
|
|
struct nd_mapping *nd_mapping, struct nd_region_desc *ndr_desc,
|
|
struct acpi_nfit_memory_map *memdev,
|
|
struct nfit_spa *nfit_spa)
|
|
{
|
|
struct nvdimm *nvdimm = acpi_nfit_dimm_by_handle(acpi_desc,
|
|
memdev->device_handle);
|
|
struct acpi_nfit_system_address *spa = nfit_spa->spa;
|
|
struct nd_blk_region_desc *ndbr_desc;
|
|
struct nfit_mem *nfit_mem;
|
|
int blk_valid = 0;
|
|
|
|
if (!nvdimm) {
|
|
dev_err(acpi_desc->dev, "spa%d dimm: %#x not found\n",
|
|
spa->range_index, memdev->device_handle);
|
|
return -ENODEV;
|
|
}
|
|
|
|
nd_mapping->nvdimm = nvdimm;
|
|
switch (nfit_spa_type(spa)) {
|
|
case NFIT_SPA_PM:
|
|
case NFIT_SPA_VOLATILE:
|
|
nd_mapping->start = memdev->address;
|
|
nd_mapping->size = memdev->region_size;
|
|
break;
|
|
case NFIT_SPA_DCR:
|
|
nfit_mem = nvdimm_provider_data(nvdimm);
|
|
if (!nfit_mem || !nfit_mem->bdw) {
|
|
dev_dbg(acpi_desc->dev, "spa%d %s missing bdw\n",
|
|
spa->range_index, nvdimm_name(nvdimm));
|
|
} else {
|
|
nd_mapping->size = nfit_mem->bdw->capacity;
|
|
nd_mapping->start = nfit_mem->bdw->start_address;
|
|
ndr_desc->num_lanes = nfit_mem->bdw->windows;
|
|
blk_valid = 1;
|
|
}
|
|
|
|
ndr_desc->nd_mapping = nd_mapping;
|
|
ndr_desc->num_mappings = blk_valid;
|
|
ndbr_desc = to_blk_region_desc(ndr_desc);
|
|
ndbr_desc->enable = acpi_nfit_blk_region_enable;
|
|
ndbr_desc->disable = acpi_nfit_blk_region_disable;
|
|
ndbr_desc->do_io = acpi_desc->blk_do_io;
|
|
nfit_spa->nd_region = nvdimm_blk_region_create(acpi_desc->nvdimm_bus,
|
|
ndr_desc);
|
|
if (!nfit_spa->nd_region)
|
|
return -ENOMEM;
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_nfit_register_region(struct acpi_nfit_desc *acpi_desc,
|
|
struct nfit_spa *nfit_spa)
|
|
{
|
|
static struct nd_mapping nd_mappings[ND_MAX_MAPPINGS];
|
|
struct acpi_nfit_system_address *spa = nfit_spa->spa;
|
|
struct nd_blk_region_desc ndbr_desc;
|
|
struct nd_region_desc *ndr_desc;
|
|
struct nfit_memdev *nfit_memdev;
|
|
struct nvdimm_bus *nvdimm_bus;
|
|
struct resource res;
|
|
int count = 0, rc;
|
|
|
|
if (nfit_spa->nd_region)
|
|
return 0;
|
|
|
|
if (spa->range_index == 0) {
|
|
dev_dbg(acpi_desc->dev, "%s: detected invalid spa index\n",
|
|
__func__);
|
|
return 0;
|
|
}
|
|
|
|
memset(&res, 0, sizeof(res));
|
|
memset(&nd_mappings, 0, sizeof(nd_mappings));
|
|
memset(&ndbr_desc, 0, sizeof(ndbr_desc));
|
|
res.start = spa->address;
|
|
res.end = res.start + spa->length - 1;
|
|
ndr_desc = &ndbr_desc.ndr_desc;
|
|
ndr_desc->res = &res;
|
|
ndr_desc->provider_data = nfit_spa;
|
|
ndr_desc->attr_groups = acpi_nfit_region_attribute_groups;
|
|
if (spa->flags & ACPI_NFIT_PROXIMITY_VALID)
|
|
ndr_desc->numa_node = acpi_map_pxm_to_online_node(
|
|
spa->proximity_domain);
|
|
else
|
|
ndr_desc->numa_node = NUMA_NO_NODE;
|
|
|
|
list_for_each_entry(nfit_memdev, &acpi_desc->memdevs, list) {
|
|
struct acpi_nfit_memory_map *memdev = nfit_memdev->memdev;
|
|
struct nd_mapping *nd_mapping;
|
|
|
|
if (memdev->range_index != spa->range_index)
|
|
continue;
|
|
if (count >= ND_MAX_MAPPINGS) {
|
|
dev_err(acpi_desc->dev, "spa%d exceeds max mappings %d\n",
|
|
spa->range_index, ND_MAX_MAPPINGS);
|
|
return -ENXIO;
|
|
}
|
|
nd_mapping = &nd_mappings[count++];
|
|
rc = acpi_nfit_init_mapping(acpi_desc, nd_mapping, ndr_desc,
|
|
memdev, nfit_spa);
|
|
if (rc)
|
|
goto out;
|
|
}
|
|
|
|
ndr_desc->nd_mapping = nd_mappings;
|
|
ndr_desc->num_mappings = count;
|
|
rc = acpi_nfit_init_interleave_set(acpi_desc, ndr_desc, spa);
|
|
if (rc)
|
|
goto out;
|
|
|
|
nvdimm_bus = acpi_desc->nvdimm_bus;
|
|
if (nfit_spa_type(spa) == NFIT_SPA_PM) {
|
|
rc = acpi_nfit_insert_resource(acpi_desc, ndr_desc);
|
|
if (rc) {
|
|
dev_warn(acpi_desc->dev,
|
|
"failed to insert pmem resource to iomem: %d\n",
|
|
rc);
|
|
goto out;
|
|
}
|
|
|
|
nfit_spa->nd_region = nvdimm_pmem_region_create(nvdimm_bus,
|
|
ndr_desc);
|
|
if (!nfit_spa->nd_region)
|
|
rc = -ENOMEM;
|
|
} else if (nfit_spa_type(spa) == NFIT_SPA_VOLATILE) {
|
|
nfit_spa->nd_region = nvdimm_volatile_region_create(nvdimm_bus,
|
|
ndr_desc);
|
|
if (!nfit_spa->nd_region)
|
|
rc = -ENOMEM;
|
|
}
|
|
|
|
out:
|
|
if (rc)
|
|
dev_err(acpi_desc->dev, "failed to register spa range %d\n",
|
|
nfit_spa->spa->range_index);
|
|
return rc;
|
|
}
|
|
|
|
static int ars_status_alloc(struct acpi_nfit_desc *acpi_desc,
|
|
u32 max_ars)
|
|
{
|
|
struct device *dev = acpi_desc->dev;
|
|
struct nd_cmd_ars_status *ars_status;
|
|
|
|
if (acpi_desc->ars_status && acpi_desc->ars_status_size >= max_ars) {
|
|
memset(acpi_desc->ars_status, 0, acpi_desc->ars_status_size);
|
|
return 0;
|
|
}
|
|
|
|
if (acpi_desc->ars_status)
|
|
devm_kfree(dev, acpi_desc->ars_status);
|
|
acpi_desc->ars_status = NULL;
|
|
ars_status = devm_kzalloc(dev, max_ars, GFP_KERNEL);
|
|
if (!ars_status)
|
|
return -ENOMEM;
|
|
acpi_desc->ars_status = ars_status;
|
|
acpi_desc->ars_status_size = max_ars;
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_nfit_query_poison(struct acpi_nfit_desc *acpi_desc,
|
|
struct nfit_spa *nfit_spa)
|
|
{
|
|
struct acpi_nfit_system_address *spa = nfit_spa->spa;
|
|
int rc;
|
|
|
|
if (!nfit_spa->max_ars) {
|
|
struct nd_cmd_ars_cap ars_cap;
|
|
|
|
memset(&ars_cap, 0, sizeof(ars_cap));
|
|
rc = ars_get_cap(acpi_desc, &ars_cap, nfit_spa);
|
|
if (rc < 0)
|
|
return rc;
|
|
nfit_spa->max_ars = ars_cap.max_ars_out;
|
|
nfit_spa->clear_err_unit = ars_cap.clear_err_unit;
|
|
/* check that the supported scrub types match the spa type */
|
|
if (nfit_spa_type(spa) == NFIT_SPA_VOLATILE &&
|
|
((ars_cap.status >> 16) & ND_ARS_VOLATILE) == 0)
|
|
return -ENOTTY;
|
|
else if (nfit_spa_type(spa) == NFIT_SPA_PM &&
|
|
((ars_cap.status >> 16) & ND_ARS_PERSISTENT) == 0)
|
|
return -ENOTTY;
|
|
}
|
|
|
|
if (ars_status_alloc(acpi_desc, nfit_spa->max_ars))
|
|
return -ENOMEM;
|
|
|
|
rc = ars_get_status(acpi_desc);
|
|
if (rc < 0 && rc != -ENOSPC)
|
|
return rc;
|
|
|
|
if (ars_status_process_records(acpi_desc->nvdimm_bus,
|
|
acpi_desc->ars_status))
|
|
return -ENOMEM;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void acpi_nfit_async_scrub(struct acpi_nfit_desc *acpi_desc,
|
|
struct nfit_spa *nfit_spa)
|
|
{
|
|
struct acpi_nfit_system_address *spa = nfit_spa->spa;
|
|
unsigned int overflow_retry = scrub_overflow_abort;
|
|
u64 init_ars_start = 0, init_ars_len = 0;
|
|
struct device *dev = acpi_desc->dev;
|
|
unsigned int tmo = scrub_timeout;
|
|
int rc;
|
|
|
|
if (nfit_spa->ars_done || !nfit_spa->nd_region)
|
|
return;
|
|
|
|
rc = ars_start(acpi_desc, nfit_spa);
|
|
/*
|
|
* If we timed out the initial scan we'll still be busy here,
|
|
* and will wait another timeout before giving up permanently.
|
|
*/
|
|
if (rc < 0 && rc != -EBUSY)
|
|
return;
|
|
|
|
do {
|
|
u64 ars_start, ars_len;
|
|
|
|
if (acpi_desc->cancel)
|
|
break;
|
|
rc = acpi_nfit_query_poison(acpi_desc, nfit_spa);
|
|
if (rc == -ENOTTY)
|
|
break;
|
|
if (rc == -EBUSY && !tmo) {
|
|
dev_warn(dev, "range %d ars timeout, aborting\n",
|
|
spa->range_index);
|
|
break;
|
|
}
|
|
|
|
if (rc == -EBUSY) {
|
|
/*
|
|
* Note, entries may be appended to the list
|
|
* while the lock is dropped, but the workqueue
|
|
* being active prevents entries being deleted /
|
|
* freed.
|
|
*/
|
|
mutex_unlock(&acpi_desc->init_mutex);
|
|
ssleep(1);
|
|
tmo--;
|
|
mutex_lock(&acpi_desc->init_mutex);
|
|
continue;
|
|
}
|
|
|
|
/* we got some results, but there are more pending... */
|
|
if (rc == -ENOSPC && overflow_retry--) {
|
|
if (!init_ars_len) {
|
|
init_ars_len = acpi_desc->ars_status->length;
|
|
init_ars_start = acpi_desc->ars_status->address;
|
|
}
|
|
rc = ars_continue(acpi_desc);
|
|
}
|
|
|
|
if (rc < 0) {
|
|
dev_warn(dev, "range %d ars continuation failed\n",
|
|
spa->range_index);
|
|
break;
|
|
}
|
|
|
|
if (init_ars_len) {
|
|
ars_start = init_ars_start;
|
|
ars_len = init_ars_len;
|
|
} else {
|
|
ars_start = acpi_desc->ars_status->address;
|
|
ars_len = acpi_desc->ars_status->length;
|
|
}
|
|
dev_dbg(dev, "spa range: %d ars from %#llx + %#llx complete\n",
|
|
spa->range_index, ars_start, ars_len);
|
|
/* notify the region about new poison entries */
|
|
nvdimm_region_notify(nfit_spa->nd_region,
|
|
NVDIMM_REVALIDATE_POISON);
|
|
break;
|
|
} while (1);
|
|
}
|
|
|
|
static void acpi_nfit_scrub(struct work_struct *work)
|
|
{
|
|
struct device *dev;
|
|
u64 init_scrub_length = 0;
|
|
struct nfit_spa *nfit_spa;
|
|
u64 init_scrub_address = 0;
|
|
bool init_ars_done = false;
|
|
struct acpi_nfit_desc *acpi_desc;
|
|
unsigned int tmo = scrub_timeout;
|
|
unsigned int overflow_retry = scrub_overflow_abort;
|
|
|
|
acpi_desc = container_of(work, typeof(*acpi_desc), work);
|
|
dev = acpi_desc->dev;
|
|
|
|
/*
|
|
* We scrub in 2 phases. The first phase waits for any platform
|
|
* firmware initiated scrubs to complete and then we go search for the
|
|
* affected spa regions to mark them scanned. In the second phase we
|
|
* initiate a directed scrub for every range that was not scrubbed in
|
|
* phase 1.
|
|
*/
|
|
|
|
/* process platform firmware initiated scrubs */
|
|
retry:
|
|
mutex_lock(&acpi_desc->init_mutex);
|
|
list_for_each_entry(nfit_spa, &acpi_desc->spas, list) {
|
|
struct nd_cmd_ars_status *ars_status;
|
|
struct acpi_nfit_system_address *spa;
|
|
u64 ars_start, ars_len;
|
|
int rc;
|
|
|
|
if (acpi_desc->cancel)
|
|
break;
|
|
|
|
if (nfit_spa->nd_region)
|
|
continue;
|
|
|
|
if (init_ars_done) {
|
|
/*
|
|
* No need to re-query, we're now just
|
|
* reconciling all the ranges covered by the
|
|
* initial scrub
|
|
*/
|
|
rc = 0;
|
|
} else
|
|
rc = acpi_nfit_query_poison(acpi_desc, nfit_spa);
|
|
|
|
if (rc == -ENOTTY) {
|
|
/* no ars capability, just register spa and move on */
|
|
acpi_nfit_register_region(acpi_desc, nfit_spa);
|
|
continue;
|
|
}
|
|
|
|
if (rc == -EBUSY && !tmo) {
|
|
/* fallthrough to directed scrub in phase 2 */
|
|
dev_warn(dev, "timeout awaiting ars results, continuing...\n");
|
|
break;
|
|
} else if (rc == -EBUSY) {
|
|
mutex_unlock(&acpi_desc->init_mutex);
|
|
ssleep(1);
|
|
tmo--;
|
|
goto retry;
|
|
}
|
|
|
|
/* we got some results, but there are more pending... */
|
|
if (rc == -ENOSPC && overflow_retry--) {
|
|
ars_status = acpi_desc->ars_status;
|
|
/*
|
|
* Record the original scrub range, so that we
|
|
* can recall all the ranges impacted by the
|
|
* initial scrub.
|
|
*/
|
|
if (!init_scrub_length) {
|
|
init_scrub_length = ars_status->length;
|
|
init_scrub_address = ars_status->address;
|
|
}
|
|
rc = ars_continue(acpi_desc);
|
|
if (rc == 0) {
|
|
mutex_unlock(&acpi_desc->init_mutex);
|
|
goto retry;
|
|
}
|
|
}
|
|
|
|
if (rc < 0) {
|
|
/*
|
|
* Initial scrub failed, we'll give it one more
|
|
* try below...
|
|
*/
|
|
break;
|
|
}
|
|
|
|
/* We got some final results, record completed ranges */
|
|
ars_status = acpi_desc->ars_status;
|
|
if (init_scrub_length) {
|
|
ars_start = init_scrub_address;
|
|
ars_len = ars_start + init_scrub_length;
|
|
} else {
|
|
ars_start = ars_status->address;
|
|
ars_len = ars_status->length;
|
|
}
|
|
spa = nfit_spa->spa;
|
|
|
|
if (!init_ars_done) {
|
|
init_ars_done = true;
|
|
dev_dbg(dev, "init scrub %#llx + %#llx complete\n",
|
|
ars_start, ars_len);
|
|
}
|
|
if (ars_start <= spa->address && ars_start + ars_len
|
|
>= spa->address + spa->length)
|
|
acpi_nfit_register_region(acpi_desc, nfit_spa);
|
|
}
|
|
|
|
/*
|
|
* For all the ranges not covered by an initial scrub we still
|
|
* want to see if there are errors, but it's ok to discover them
|
|
* asynchronously.
|
|
*/
|
|
list_for_each_entry(nfit_spa, &acpi_desc->spas, list) {
|
|
/*
|
|
* Flag all the ranges that still need scrubbing, but
|
|
* register them now to make data available.
|
|
*/
|
|
if (nfit_spa->nd_region)
|
|
nfit_spa->ars_done = 1;
|
|
else
|
|
acpi_nfit_register_region(acpi_desc, nfit_spa);
|
|
}
|
|
|
|
list_for_each_entry(nfit_spa, &acpi_desc->spas, list)
|
|
acpi_nfit_async_scrub(acpi_desc, nfit_spa);
|
|
mutex_unlock(&acpi_desc->init_mutex);
|
|
}
|
|
|
|
static int acpi_nfit_register_regions(struct acpi_nfit_desc *acpi_desc)
|
|
{
|
|
struct nfit_spa *nfit_spa;
|
|
int rc;
|
|
|
|
list_for_each_entry(nfit_spa, &acpi_desc->spas, list)
|
|
if (nfit_spa_type(nfit_spa->spa) == NFIT_SPA_DCR) {
|
|
/* BLK regions don't need to wait for ars results */
|
|
rc = acpi_nfit_register_region(acpi_desc, nfit_spa);
|
|
if (rc)
|
|
return rc;
|
|
}
|
|
|
|
queue_work(nfit_wq, &acpi_desc->work);
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_nfit_check_deletions(struct acpi_nfit_desc *acpi_desc,
|
|
struct nfit_table_prev *prev)
|
|
{
|
|
struct device *dev = acpi_desc->dev;
|
|
|
|
if (!list_empty(&prev->spas) ||
|
|
!list_empty(&prev->memdevs) ||
|
|
!list_empty(&prev->dcrs) ||
|
|
!list_empty(&prev->bdws) ||
|
|
!list_empty(&prev->idts) ||
|
|
!list_empty(&prev->flushes)) {
|
|
dev_err(dev, "new nfit deletes entries (unsupported)\n");
|
|
return -ENXIO;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int acpi_nfit_init(struct acpi_nfit_desc *acpi_desc, acpi_size sz)
|
|
{
|
|
struct device *dev = acpi_desc->dev;
|
|
struct nfit_table_prev prev;
|
|
const void *end;
|
|
u8 *data;
|
|
int rc;
|
|
|
|
mutex_lock(&acpi_desc->init_mutex);
|
|
|
|
INIT_LIST_HEAD(&prev.spas);
|
|
INIT_LIST_HEAD(&prev.memdevs);
|
|
INIT_LIST_HEAD(&prev.dcrs);
|
|
INIT_LIST_HEAD(&prev.bdws);
|
|
INIT_LIST_HEAD(&prev.idts);
|
|
INIT_LIST_HEAD(&prev.flushes);
|
|
|
|
list_cut_position(&prev.spas, &acpi_desc->spas,
|
|
acpi_desc->spas.prev);
|
|
list_cut_position(&prev.memdevs, &acpi_desc->memdevs,
|
|
acpi_desc->memdevs.prev);
|
|
list_cut_position(&prev.dcrs, &acpi_desc->dcrs,
|
|
acpi_desc->dcrs.prev);
|
|
list_cut_position(&prev.bdws, &acpi_desc->bdws,
|
|
acpi_desc->bdws.prev);
|
|
list_cut_position(&prev.idts, &acpi_desc->idts,
|
|
acpi_desc->idts.prev);
|
|
list_cut_position(&prev.flushes, &acpi_desc->flushes,
|
|
acpi_desc->flushes.prev);
|
|
|
|
data = (u8 *) acpi_desc->nfit;
|
|
end = data + sz;
|
|
while (!IS_ERR_OR_NULL(data))
|
|
data = add_table(acpi_desc, &prev, data, end);
|
|
|
|
if (IS_ERR(data)) {
|
|
dev_dbg(dev, "%s: nfit table parsing error: %ld\n", __func__,
|
|
PTR_ERR(data));
|
|
rc = PTR_ERR(data);
|
|
goto out_unlock;
|
|
}
|
|
|
|
rc = acpi_nfit_check_deletions(acpi_desc, &prev);
|
|
if (rc)
|
|
goto out_unlock;
|
|
|
|
if (nfit_mem_init(acpi_desc) != 0) {
|
|
rc = -ENOMEM;
|
|
goto out_unlock;
|
|
}
|
|
|
|
acpi_nfit_init_dsms(acpi_desc);
|
|
|
|
rc = acpi_nfit_register_dimms(acpi_desc);
|
|
if (rc)
|
|
goto out_unlock;
|
|
|
|
rc = acpi_nfit_register_regions(acpi_desc);
|
|
|
|
out_unlock:
|
|
mutex_unlock(&acpi_desc->init_mutex);
|
|
return rc;
|
|
}
|
|
EXPORT_SYMBOL_GPL(acpi_nfit_init);
|
|
|
|
struct acpi_nfit_flush_work {
|
|
struct work_struct work;
|
|
struct completion cmp;
|
|
};
|
|
|
|
static void flush_probe(struct work_struct *work)
|
|
{
|
|
struct acpi_nfit_flush_work *flush;
|
|
|
|
flush = container_of(work, typeof(*flush), work);
|
|
complete(&flush->cmp);
|
|
}
|
|
|
|
static int acpi_nfit_flush_probe(struct nvdimm_bus_descriptor *nd_desc)
|
|
{
|
|
struct acpi_nfit_desc *acpi_desc = to_acpi_nfit_desc(nd_desc);
|
|
struct device *dev = acpi_desc->dev;
|
|
struct acpi_nfit_flush_work flush;
|
|
|
|
/* bounce the device lock to flush acpi_nfit_add / acpi_nfit_notify */
|
|
device_lock(dev);
|
|
device_unlock(dev);
|
|
|
|
/*
|
|
* Scrub work could take 10s of seconds, userspace may give up so we
|
|
* need to be interruptible while waiting.
|
|
*/
|
|
INIT_WORK_ONSTACK(&flush.work, flush_probe);
|
|
COMPLETION_INITIALIZER_ONSTACK(flush.cmp);
|
|
queue_work(nfit_wq, &flush.work);
|
|
return wait_for_completion_interruptible(&flush.cmp);
|
|
}
|
|
|
|
static int acpi_nfit_clear_to_send(struct nvdimm_bus_descriptor *nd_desc,
|
|
struct nvdimm *nvdimm, unsigned int cmd)
|
|
{
|
|
struct acpi_nfit_desc *acpi_desc = to_acpi_nfit_desc(nd_desc);
|
|
|
|
if (nvdimm)
|
|
return 0;
|
|
if (cmd != ND_CMD_ARS_START)
|
|
return 0;
|
|
|
|
/*
|
|
* The kernel and userspace may race to initiate a scrub, but
|
|
* the scrub thread is prepared to lose that initial race. It
|
|
* just needs guarantees that any ars it initiates are not
|
|
* interrupted by any intervening start reqeusts from userspace.
|
|
*/
|
|
if (work_busy(&acpi_desc->work))
|
|
return -EBUSY;
|
|
|
|
return 0;
|
|
}
|
|
|
|
void acpi_nfit_desc_init(struct acpi_nfit_desc *acpi_desc, struct device *dev)
|
|
{
|
|
struct nvdimm_bus_descriptor *nd_desc;
|
|
|
|
dev_set_drvdata(dev, acpi_desc);
|
|
acpi_desc->dev = dev;
|
|
acpi_desc->blk_do_io = acpi_nfit_blk_region_do_io;
|
|
nd_desc = &acpi_desc->nd_desc;
|
|
nd_desc->provider_name = "ACPI.NFIT";
|
|
nd_desc->ndctl = acpi_nfit_ctl;
|
|
nd_desc->flush_probe = acpi_nfit_flush_probe;
|
|
nd_desc->clear_to_send = acpi_nfit_clear_to_send;
|
|
nd_desc->attr_groups = acpi_nfit_attribute_groups;
|
|
|
|
INIT_LIST_HEAD(&acpi_desc->spa_maps);
|
|
INIT_LIST_HEAD(&acpi_desc->spas);
|
|
INIT_LIST_HEAD(&acpi_desc->dcrs);
|
|
INIT_LIST_HEAD(&acpi_desc->bdws);
|
|
INIT_LIST_HEAD(&acpi_desc->idts);
|
|
INIT_LIST_HEAD(&acpi_desc->flushes);
|
|
INIT_LIST_HEAD(&acpi_desc->memdevs);
|
|
INIT_LIST_HEAD(&acpi_desc->dimms);
|
|
mutex_init(&acpi_desc->spa_map_mutex);
|
|
mutex_init(&acpi_desc->init_mutex);
|
|
INIT_WORK(&acpi_desc->work, acpi_nfit_scrub);
|
|
}
|
|
EXPORT_SYMBOL_GPL(acpi_nfit_desc_init);
|
|
|
|
static int acpi_nfit_add(struct acpi_device *adev)
|
|
{
|
|
struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
|
|
struct acpi_nfit_desc *acpi_desc;
|
|
struct device *dev = &adev->dev;
|
|
struct acpi_table_header *tbl;
|
|
acpi_status status = AE_OK;
|
|
acpi_size sz;
|
|
int rc;
|
|
|
|
status = acpi_get_table_with_size(ACPI_SIG_NFIT, 0, &tbl, &sz);
|
|
if (ACPI_FAILURE(status)) {
|
|
/* This is ok, we could have an nvdimm hotplugged later */
|
|
dev_dbg(dev, "failed to find NFIT at startup\n");
|
|
return 0;
|
|
}
|
|
|
|
acpi_desc = devm_kzalloc(dev, sizeof(*acpi_desc), GFP_KERNEL);
|
|
if (!acpi_desc)
|
|
return -ENOMEM;
|
|
acpi_nfit_desc_init(acpi_desc, &adev->dev);
|
|
acpi_desc->nvdimm_bus = nvdimm_bus_register(dev, &acpi_desc->nd_desc);
|
|
if (!acpi_desc->nvdimm_bus)
|
|
return -ENOMEM;
|
|
|
|
/*
|
|
* Save the acpi header for later and then skip it,
|
|
* making nfit point to the first nfit table header.
|
|
*/
|
|
acpi_desc->acpi_header = *tbl;
|
|
acpi_desc->nfit = (void *) tbl + sizeof(struct acpi_table_nfit);
|
|
sz -= sizeof(struct acpi_table_nfit);
|
|
|
|
/* Evaluate _FIT and override with that if present */
|
|
status = acpi_evaluate_object(adev->handle, "_FIT", NULL, &buf);
|
|
if (ACPI_SUCCESS(status) && buf.length > 0) {
|
|
union acpi_object *obj;
|
|
/*
|
|
* Adjust for the acpi_object header of the _FIT
|
|
*/
|
|
obj = buf.pointer;
|
|
if (obj->type == ACPI_TYPE_BUFFER) {
|
|
acpi_desc->nfit =
|
|
(struct acpi_nfit_header *)obj->buffer.pointer;
|
|
sz = obj->buffer.length;
|
|
} else
|
|
dev_dbg(dev, "%s invalid type %d, ignoring _FIT\n",
|
|
__func__, (int) obj->type);
|
|
}
|
|
|
|
rc = acpi_nfit_init(acpi_desc, sz);
|
|
if (rc) {
|
|
nvdimm_bus_unregister(acpi_desc->nvdimm_bus);
|
|
return rc;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_nfit_remove(struct acpi_device *adev)
|
|
{
|
|
struct acpi_nfit_desc *acpi_desc = dev_get_drvdata(&adev->dev);
|
|
|
|
acpi_desc->cancel = 1;
|
|
flush_workqueue(nfit_wq);
|
|
nvdimm_bus_unregister(acpi_desc->nvdimm_bus);
|
|
return 0;
|
|
}
|
|
|
|
static void acpi_nfit_notify(struct acpi_device *adev, u32 event)
|
|
{
|
|
struct acpi_nfit_desc *acpi_desc = dev_get_drvdata(&adev->dev);
|
|
struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
|
|
struct acpi_nfit_header *nfit_saved;
|
|
union acpi_object *obj;
|
|
struct device *dev = &adev->dev;
|
|
acpi_status status;
|
|
int ret;
|
|
|
|
dev_dbg(dev, "%s: event: %d\n", __func__, event);
|
|
|
|
device_lock(dev);
|
|
if (!dev->driver) {
|
|
/* dev->driver may be null if we're being removed */
|
|
dev_dbg(dev, "%s: no driver found for dev\n", __func__);
|
|
goto out_unlock;
|
|
}
|
|
|
|
if (!acpi_desc) {
|
|
acpi_desc = devm_kzalloc(dev, sizeof(*acpi_desc), GFP_KERNEL);
|
|
if (!acpi_desc)
|
|
goto out_unlock;
|
|
acpi_nfit_desc_init(acpi_desc, &adev->dev);
|
|
acpi_desc->nvdimm_bus = nvdimm_bus_register(dev, &acpi_desc->nd_desc);
|
|
if (!acpi_desc->nvdimm_bus)
|
|
goto out_unlock;
|
|
} else {
|
|
/*
|
|
* Finish previous registration before considering new
|
|
* regions.
|
|
*/
|
|
flush_workqueue(nfit_wq);
|
|
}
|
|
|
|
/* Evaluate _FIT */
|
|
status = acpi_evaluate_object(adev->handle, "_FIT", NULL, &buf);
|
|
if (ACPI_FAILURE(status)) {
|
|
dev_err(dev, "failed to evaluate _FIT\n");
|
|
goto out_unlock;
|
|
}
|
|
|
|
nfit_saved = acpi_desc->nfit;
|
|
obj = buf.pointer;
|
|
if (obj->type == ACPI_TYPE_BUFFER) {
|
|
acpi_desc->nfit =
|
|
(struct acpi_nfit_header *)obj->buffer.pointer;
|
|
ret = acpi_nfit_init(acpi_desc, obj->buffer.length);
|
|
if (ret) {
|
|
/* Merge failed, restore old nfit, and exit */
|
|
acpi_desc->nfit = nfit_saved;
|
|
dev_err(dev, "failed to merge updated NFIT\n");
|
|
}
|
|
} else {
|
|
/* Bad _FIT, restore old nfit */
|
|
dev_err(dev, "Invalid _FIT\n");
|
|
}
|
|
kfree(buf.pointer);
|
|
|
|
out_unlock:
|
|
device_unlock(dev);
|
|
}
|
|
|
|
static const struct acpi_device_id acpi_nfit_ids[] = {
|
|
{ "ACPI0012", 0 },
|
|
{ "", 0 },
|
|
};
|
|
MODULE_DEVICE_TABLE(acpi, acpi_nfit_ids);
|
|
|
|
static struct acpi_driver acpi_nfit_driver = {
|
|
.name = KBUILD_MODNAME,
|
|
.ids = acpi_nfit_ids,
|
|
.ops = {
|
|
.add = acpi_nfit_add,
|
|
.remove = acpi_nfit_remove,
|
|
.notify = acpi_nfit_notify,
|
|
},
|
|
};
|
|
|
|
static __init int nfit_init(void)
|
|
{
|
|
BUILD_BUG_ON(sizeof(struct acpi_table_nfit) != 40);
|
|
BUILD_BUG_ON(sizeof(struct acpi_nfit_system_address) != 56);
|
|
BUILD_BUG_ON(sizeof(struct acpi_nfit_memory_map) != 48);
|
|
BUILD_BUG_ON(sizeof(struct acpi_nfit_interleave) != 20);
|
|
BUILD_BUG_ON(sizeof(struct acpi_nfit_smbios) != 9);
|
|
BUILD_BUG_ON(sizeof(struct acpi_nfit_control_region) != 80);
|
|
BUILD_BUG_ON(sizeof(struct acpi_nfit_data_region) != 40);
|
|
|
|
acpi_str_to_uuid(UUID_VOLATILE_MEMORY, nfit_uuid[NFIT_SPA_VOLATILE]);
|
|
acpi_str_to_uuid(UUID_PERSISTENT_MEMORY, nfit_uuid[NFIT_SPA_PM]);
|
|
acpi_str_to_uuid(UUID_CONTROL_REGION, nfit_uuid[NFIT_SPA_DCR]);
|
|
acpi_str_to_uuid(UUID_DATA_REGION, nfit_uuid[NFIT_SPA_BDW]);
|
|
acpi_str_to_uuid(UUID_VOLATILE_VIRTUAL_DISK, nfit_uuid[NFIT_SPA_VDISK]);
|
|
acpi_str_to_uuid(UUID_VOLATILE_VIRTUAL_CD, nfit_uuid[NFIT_SPA_VCD]);
|
|
acpi_str_to_uuid(UUID_PERSISTENT_VIRTUAL_DISK, nfit_uuid[NFIT_SPA_PDISK]);
|
|
acpi_str_to_uuid(UUID_PERSISTENT_VIRTUAL_CD, nfit_uuid[NFIT_SPA_PCD]);
|
|
acpi_str_to_uuid(UUID_NFIT_BUS, nfit_uuid[NFIT_DEV_BUS]);
|
|
acpi_str_to_uuid(UUID_NFIT_DIMM, nfit_uuid[NFIT_DEV_DIMM]);
|
|
acpi_str_to_uuid(UUID_NFIT_DIMM_N_HPE1, nfit_uuid[NFIT_DEV_DIMM_N_HPE1]);
|
|
acpi_str_to_uuid(UUID_NFIT_DIMM_N_HPE2, nfit_uuid[NFIT_DEV_DIMM_N_HPE2]);
|
|
|
|
nfit_wq = create_singlethread_workqueue("nfit");
|
|
if (!nfit_wq)
|
|
return -ENOMEM;
|
|
|
|
return acpi_bus_register_driver(&acpi_nfit_driver);
|
|
}
|
|
|
|
static __exit void nfit_exit(void)
|
|
{
|
|
acpi_bus_unregister_driver(&acpi_nfit_driver);
|
|
destroy_workqueue(nfit_wq);
|
|
}
|
|
|
|
module_init(nfit_init);
|
|
module_exit(nfit_exit);
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_AUTHOR("Intel Corporation");
|