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-rw-r--r--drivers/acpi/int340x_thermal.c53
-rw-r--r--drivers/acpi/nfit.c2714
-rw-r--r--drivers/acpi/nfit.h223
3 files changed, 0 insertions, 2990 deletions
diff --git a/drivers/acpi/int340x_thermal.c b/drivers/acpi/int340x_thermal.c
deleted file mode 100644
index 33505c651..000000000
--- a/drivers/acpi/int340x_thermal.c
+++ /dev/null
@@ -1,53 +0,0 @@
-/*
- * ACPI support for int340x thermal drivers
- *
- * Copyright (C) 2014, Intel Corporation
- * Authors: Zhang Rui <rui.zhang@intel.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <linux/acpi.h>
-#include <linux/module.h>
-
-#include "internal.h"
-
-#define INT3401_DEVICE 0X01
-static const struct acpi_device_id int340x_thermal_device_ids[] = {
- {"INT3400"},
- {"INT3401", INT3401_DEVICE},
- {"INT3402"},
- {"INT3403"},
- {"INT3404"},
- {"INT3406"},
- {"INT3407"},
- {"INT3408"},
- {"INT3409"},
- {"INT340A"},
- {"INT340B"},
- {""},
-};
-
-static int int340x_thermal_handler_attach(struct acpi_device *adev,
- const struct acpi_device_id *id)
-{
- if (IS_ENABLED(CONFIG_INT340X_THERMAL))
- acpi_create_platform_device(adev);
- /* Intel SoC DTS thermal driver needs INT3401 to set IRQ descriptor */
- else if (IS_ENABLED(CONFIG_INTEL_SOC_DTS_THERMAL) &&
- id->driver_data == INT3401_DEVICE)
- acpi_create_platform_device(adev);
- return 1;
-}
-
-static struct acpi_scan_handler int340x_thermal_handler = {
- .ids = int340x_thermal_device_ids,
- .attach = int340x_thermal_handler_attach,
-};
-
-void __init acpi_int340x_thermal_init(void)
-{
- acpi_scan_add_handler(&int340x_thermal_handler);
-}
diff --git a/drivers/acpi/nfit.c b/drivers/acpi/nfit.c
deleted file mode 100644
index 375c10f38..000000000
--- a/drivers/acpi/nfit.c
+++ /dev/null
@@ -1,2714 +0,0 @@
-/*
- * Copyright(c) 2013-2015 Intel Corporation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of version 2 of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- */
-#include <linux/list_sort.h>
-#include <linux/libnvdimm.h>
-#include <linux/module.h>
-#include <linux/mutex.h>
-#include <linux/ndctl.h>
-#include <linux/delay.h>
-#include <linux/list.h>
-#include <linux/acpi.h>
-#include <linux/sort.h>
-#include <linux/pmem.h>
-#include <linux/io.h>
-#include <linux/nd.h>
-#include <asm/cacheflush.h>
-#include "nfit.h"
-
-/*
- * For readq() and writeq() on 32-bit builds, the hi-lo, lo-hi order is
- * irrelevant.
- */
-#include <linux/io-64-nonatomic-hi-lo.h>
-
-static bool force_enable_dimms;
-module_param(force_enable_dimms, bool, S_IRUGO|S_IWUSR);
-MODULE_PARM_DESC(force_enable_dimms, "Ignore _STA (ACPI DIMM device) status");
-
-static unsigned int scrub_timeout = NFIT_ARS_TIMEOUT;
-module_param(scrub_timeout, uint, S_IRUGO|S_IWUSR);
-MODULE_PARM_DESC(scrub_timeout, "Initial scrub timeout in seconds");
-
-/* after three payloads of overflow, it's dead jim */
-static unsigned int scrub_overflow_abort = 3;
-module_param(scrub_overflow_abort, uint, S_IRUGO|S_IWUSR);
-MODULE_PARM_DESC(scrub_overflow_abort,
- "Number of times we overflow ARS results before abort");
-
-static bool disable_vendor_specific;
-module_param(disable_vendor_specific, bool, S_IRUGO);
-MODULE_PARM_DESC(disable_vendor_specific,
- "Limit commands to the publicly specified set\n");
-
-static struct workqueue_struct *nfit_wq;
-
-struct nfit_table_prev {
- struct list_head spas;
- struct list_head memdevs;
- struct list_head dcrs;
- struct list_head bdws;
- struct list_head idts;
- struct list_head flushes;
-};
-
-static u8 nfit_uuid[NFIT_UUID_MAX][16];
-
-const u8 *to_nfit_uuid(enum nfit_uuids id)
-{
- return nfit_uuid[id];
-}
-EXPORT_SYMBOL(to_nfit_uuid);
-
-static struct acpi_nfit_desc *to_acpi_nfit_desc(
- struct nvdimm_bus_descriptor *nd_desc)
-{
- return container_of(nd_desc, struct acpi_nfit_desc, nd_desc);
-}
-
-static struct acpi_device *to_acpi_dev(struct acpi_nfit_desc *acpi_desc)
-{
- struct nvdimm_bus_descriptor *nd_desc = &acpi_desc->nd_desc;
-
- /*
- * If provider == 'ACPI.NFIT' we can assume 'dev' is a struct
- * acpi_device.
- */
- if (!nd_desc->provider_name
- || strcmp(nd_desc->provider_name, "ACPI.NFIT") != 0)
- return NULL;
-
- return to_acpi_device(acpi_desc->dev);
-}
-
-static int xlat_status(void *buf, unsigned int cmd)
-{
- struct nd_cmd_clear_error *clear_err;
- struct nd_cmd_ars_status *ars_status;
- struct nd_cmd_ars_start *ars_start;
- struct nd_cmd_ars_cap *ars_cap;
- u16 flags;
-
- switch (cmd) {
- case ND_CMD_ARS_CAP:
- ars_cap = buf;
- if ((ars_cap->status & 0xffff) == NFIT_ARS_CAP_NONE)
- return -ENOTTY;
-
- /* Command failed */
- if (ars_cap->status & 0xffff)
- return -EIO;
-
- /* No supported scan types for this range */
- flags = ND_ARS_PERSISTENT | ND_ARS_VOLATILE;
- if ((ars_cap->status >> 16 & flags) == 0)
- return -ENOTTY;
- break;
- case ND_CMD_ARS_START:
- ars_start = buf;
- /* ARS is in progress */
- if ((ars_start->status & 0xffff) == NFIT_ARS_START_BUSY)
- return -EBUSY;
-
- /* Command failed */
- if (ars_start->status & 0xffff)
- return -EIO;
- break;
- case ND_CMD_ARS_STATUS:
- ars_status = buf;
- /* Command failed */
- if (ars_status->status & 0xffff)
- return -EIO;
- /* Check extended status (Upper two bytes) */
- if (ars_status->status == NFIT_ARS_STATUS_DONE)
- return 0;
-
- /* ARS is in progress */
- if (ars_status->status == NFIT_ARS_STATUS_BUSY)
- return -EBUSY;
-
- /* No ARS performed for the current boot */
- if (ars_status->status == NFIT_ARS_STATUS_NONE)
- return -EAGAIN;
-
- /*
- * ARS interrupted, either we overflowed or some other
- * agent wants the scan to stop. If we didn't overflow
- * then just continue with the returned results.
- */
- if (ars_status->status == NFIT_ARS_STATUS_INTR) {
- if (ars_status->flags & NFIT_ARS_F_OVERFLOW)
- return -ENOSPC;
- return 0;
- }
-
- /* Unknown status */
- if (ars_status->status >> 16)
- return -EIO;
- break;
- case ND_CMD_CLEAR_ERROR:
- clear_err = buf;
- if (clear_err->status & 0xffff)
- return -EIO;
- if (!clear_err->cleared)
- return -EIO;
- if (clear_err->length > clear_err->cleared)
- return clear_err->cleared;
- break;
- default:
- break;
- }
-
- return 0;
-}
-
-static int acpi_nfit_ctl(struct nvdimm_bus_descriptor *nd_desc,
- struct nvdimm *nvdimm, unsigned int cmd, void *buf,
- unsigned int buf_len, int *cmd_rc)
-{
- struct acpi_nfit_desc *acpi_desc = to_acpi_nfit_desc(nd_desc);
- union acpi_object in_obj, in_buf, *out_obj;
- const struct nd_cmd_desc *desc = NULL;
- struct device *dev = acpi_desc->dev;
- struct nd_cmd_pkg *call_pkg = NULL;
- const char *cmd_name, *dimm_name;
- unsigned long cmd_mask, dsm_mask;
- acpi_handle handle;
- unsigned int func;
- const u8 *uuid;
- u32 offset;
- int rc, i;
-
- func = cmd;
- if (cmd == ND_CMD_CALL) {
- call_pkg = buf;
- func = call_pkg->nd_command;
- }
-
- if (nvdimm) {
- struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
- struct acpi_device *adev = nfit_mem->adev;
-
- if (!adev)
- return -ENOTTY;
- if (call_pkg && nfit_mem->family != call_pkg->nd_family)
- return -ENOTTY;
-
- dimm_name = nvdimm_name(nvdimm);
- cmd_name = nvdimm_cmd_name(cmd);
- cmd_mask = nvdimm_cmd_mask(nvdimm);
- dsm_mask = nfit_mem->dsm_mask;
- desc = nd_cmd_dimm_desc(cmd);
- uuid = to_nfit_uuid(nfit_mem->family);
- handle = adev->handle;
- } else {
- struct acpi_device *adev = to_acpi_dev(acpi_desc);
-
- cmd_name = nvdimm_bus_cmd_name(cmd);
- cmd_mask = nd_desc->cmd_mask;
- dsm_mask = cmd_mask;
- desc = nd_cmd_bus_desc(cmd);
- uuid = to_nfit_uuid(NFIT_DEV_BUS);
- handle = adev->handle;
- dimm_name = "bus";
- }
-
- if (!desc || (cmd && (desc->out_num + desc->in_num == 0)))
- return -ENOTTY;
-
- if (!test_bit(cmd, &cmd_mask) || !test_bit(func, &dsm_mask))
- return -ENOTTY;
-
- in_obj.type = ACPI_TYPE_PACKAGE;
- in_obj.package.count = 1;
- in_obj.package.elements = &in_buf;
- in_buf.type = ACPI_TYPE_BUFFER;
- in_buf.buffer.pointer = buf;
- in_buf.buffer.length = 0;
-
- /* libnvdimm has already validated the input envelope */
- for (i = 0; i < desc->in_num; i++)
- in_buf.buffer.length += nd_cmd_in_size(nvdimm, cmd, desc,
- i, buf);
-
- if (call_pkg) {
- /* skip over package wrapper */
- in_buf.buffer.pointer = (void *) &call_pkg->nd_payload;
- in_buf.buffer.length = call_pkg->nd_size_in;
- }
-
- if (IS_ENABLED(CONFIG_ACPI_NFIT_DEBUG)) {
- dev_dbg(dev, "%s:%s cmd: %d: func: %d input length: %d\n",
- __func__, dimm_name, cmd, func,
- in_buf.buffer.length);
- print_hex_dump_debug("nvdimm in ", DUMP_PREFIX_OFFSET, 4, 4,
- in_buf.buffer.pointer,
- min_t(u32, 256, in_buf.buffer.length), true);
- }
-
- out_obj = acpi_evaluate_dsm(handle, uuid, 1, func, &in_obj);
- if (!out_obj) {
- dev_dbg(dev, "%s:%s _DSM failed cmd: %s\n", __func__, dimm_name,
- cmd_name);
- return -EINVAL;
- }
-
- if (call_pkg) {
- call_pkg->nd_fw_size = out_obj->buffer.length;
- memcpy(call_pkg->nd_payload + call_pkg->nd_size_in,
- out_obj->buffer.pointer,
- min(call_pkg->nd_fw_size, call_pkg->nd_size_out));
-
- ACPI_FREE(out_obj);
- /*
- * Need to support FW function w/o known size in advance.
- * Caller can determine required size based upon nd_fw_size.
- * If we return an error (like elsewhere) then caller wouldn't
- * be able to rely upon data returned to make calculation.
- */
- return 0;
- }
-
- if (out_obj->package.type != ACPI_TYPE_BUFFER) {
- dev_dbg(dev, "%s:%s unexpected output object type cmd: %s type: %d\n",
- __func__, dimm_name, cmd_name, out_obj->type);
- rc = -EINVAL;
- goto out;
- }
-
- if (IS_ENABLED(CONFIG_ACPI_NFIT_DEBUG)) {
- dev_dbg(dev, "%s:%s cmd: %s output length: %d\n", __func__,
- dimm_name, cmd_name, out_obj->buffer.length);
- print_hex_dump_debug(cmd_name, DUMP_PREFIX_OFFSET, 4,
- 4, out_obj->buffer.pointer, min_t(u32, 128,
- out_obj->buffer.length), true);
- }
-
- for (i = 0, offset = 0; i < desc->out_num; i++) {
- u32 out_size = nd_cmd_out_size(nvdimm, cmd, desc, i, buf,
- (u32 *) out_obj->buffer.pointer);
-
- if (offset + out_size > out_obj->buffer.length) {
- dev_dbg(dev, "%s:%s output object underflow cmd: %s field: %d\n",
- __func__, dimm_name, cmd_name, i);
- break;
- }
-
- if (in_buf.buffer.length + offset + out_size > buf_len) {
- dev_dbg(dev, "%s:%s output overrun cmd: %s field: %d\n",
- __func__, dimm_name, cmd_name, i);
- rc = -ENXIO;
- goto out;
- }
- memcpy(buf + in_buf.buffer.length + offset,
- out_obj->buffer.pointer + offset, out_size);
- offset += out_size;
- }
- if (offset + in_buf.buffer.length < buf_len) {
- if (i >= 1) {
- /*
- * status valid, return the number of bytes left
- * unfilled in the output buffer
- */
- rc = buf_len - offset - in_buf.buffer.length;
- if (cmd_rc)
- *cmd_rc = xlat_status(buf, cmd);
- } else {
- dev_err(dev, "%s:%s underrun cmd: %s buf_len: %d out_len: %d\n",
- __func__, dimm_name, cmd_name, buf_len,
- offset);
- rc = -ENXIO;
- }
- } else {
- rc = 0;
- if (cmd_rc)
- *cmd_rc = xlat_status(buf, cmd);
- }
-
- out:
- ACPI_FREE(out_obj);
-
- return rc;
-}
-
-static const char *spa_type_name(u16 type)
-{
- static const char *to_name[] = {
- [NFIT_SPA_VOLATILE] = "volatile",
- [NFIT_SPA_PM] = "pmem",
- [NFIT_SPA_DCR] = "dimm-control-region",
- [NFIT_SPA_BDW] = "block-data-window",
- [NFIT_SPA_VDISK] = "volatile-disk",
- [NFIT_SPA_VCD] = "volatile-cd",
- [NFIT_SPA_PDISK] = "persistent-disk",
- [NFIT_SPA_PCD] = "persistent-cd",
-
- };
-
- if (type > NFIT_SPA_PCD)
- return "unknown";
-
- return to_name[type];
-}
-
-static int nfit_spa_type(struct acpi_nfit_system_address *spa)
-{
- int i;
-
- for (i = 0; i < NFIT_UUID_MAX; i++)
- if (memcmp(to_nfit_uuid(i), spa->range_guid, 16) == 0)
- return i;
- return -1;
-}
-
-static bool add_spa(struct acpi_nfit_desc *acpi_desc,
- struct nfit_table_prev *prev,
- struct acpi_nfit_system_address *spa)
-{
- size_t length = min_t(size_t, sizeof(*spa), spa->header.length);
- struct device *dev = acpi_desc->dev;
- struct nfit_spa *nfit_spa;
-
- list_for_each_entry(nfit_spa, &prev->spas, list) {
- if (memcmp(nfit_spa->spa, spa, length) == 0) {
- list_move_tail(&nfit_spa->list, &acpi_desc->spas);
- return true;
- }
- }
-
- nfit_spa = devm_kzalloc(dev, sizeof(*nfit_spa), GFP_KERNEL);
- if (!nfit_spa)
- return false;
- INIT_LIST_HEAD(&nfit_spa->list);
- nfit_spa->spa = spa;
- list_add_tail(&nfit_spa->list, &acpi_desc->spas);
- dev_dbg(dev, "%s: spa index: %d type: %s\n", __func__,
- spa->range_index,
- spa_type_name(nfit_spa_type(spa)));
- return true;
-}
-
-static bool add_memdev(struct acpi_nfit_desc *acpi_desc,
- struct nfit_table_prev *prev,
- struct acpi_nfit_memory_map *memdev)
-{
- size_t length = min_t(size_t, sizeof(*memdev), memdev->header.length);
- struct device *dev = acpi_desc->dev;
- struct nfit_memdev *nfit_memdev;
-
- list_for_each_entry(nfit_memdev, &prev->memdevs, list)
- if (memcmp(nfit_memdev->memdev, memdev, length) == 0) {
- list_move_tail(&nfit_memdev->list, &acpi_desc->memdevs);
- return true;
- }
-
- nfit_memdev = devm_kzalloc(dev, sizeof(*nfit_memdev), GFP_KERNEL);
- if (!nfit_memdev)
- return false;
- INIT_LIST_HEAD(&nfit_memdev->list);
- nfit_memdev->memdev = memdev;
- list_add_tail(&nfit_memdev->list, &acpi_desc->memdevs);
- dev_dbg(dev, "%s: memdev handle: %#x spa: %d dcr: %d\n",
- __func__, memdev->device_handle, memdev->range_index,
- memdev->region_index);
- return true;
-}
-
-static bool add_dcr(struct acpi_nfit_desc *acpi_desc,
- struct nfit_table_prev *prev,
- struct acpi_nfit_control_region *dcr)
-{
- size_t length = min_t(size_t, sizeof(*dcr), dcr->header.length);
- struct device *dev = acpi_desc->dev;
- struct nfit_dcr *nfit_dcr;
-
- list_for_each_entry(nfit_dcr, &prev->dcrs, list)
- if (memcmp(nfit_dcr->dcr, dcr, length) == 0) {
- list_move_tail(&nfit_dcr->list, &acpi_desc->dcrs);
- return true;
- }
-
- nfit_dcr = devm_kzalloc(dev, sizeof(*nfit_dcr), GFP_KERNEL);
- if (!nfit_dcr)
- return false;
- INIT_LIST_HEAD(&nfit_dcr->list);
- nfit_dcr->dcr = dcr;
- list_add_tail(&nfit_dcr->list, &acpi_desc->dcrs);
- dev_dbg(dev, "%s: dcr index: %d windows: %d\n", __func__,
- dcr->region_index, dcr->windows);
- return true;
-}
-
-static bool add_bdw(struct acpi_nfit_desc *acpi_desc,
- struct nfit_table_prev *prev,
- struct acpi_nfit_data_region *bdw)
-{
- size_t length = min_t(size_t, sizeof(*bdw), bdw->header.length);
- struct device *dev = acpi_desc->dev;
- struct nfit_bdw *nfit_bdw;
-
- list_for_each_entry(nfit_bdw, &prev->bdws, list)
- if (memcmp(nfit_bdw->bdw, bdw, length) == 0) {
- list_move_tail(&nfit_bdw->list, &acpi_desc->bdws);
- return true;
- }
-
- nfit_bdw = devm_kzalloc(dev, sizeof(*nfit_bdw), GFP_KERNEL);
- if (!nfit_bdw)
- return false;
- 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", le16_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, "0x%04x\n",
- le16_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_dbg(dev, "unknown dimm command family\n");
- nfit_mem->family = -1;
- /* DSMs are optional, continue loading the driver... */
- return 0;
- }
-
- 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;
- const u32 STATUS_MASK = 0x80000037;
-
- if (mmio->num_lines)
- offset = to_interleave_offset(offset, mmio);
-
- return readl(mmio->addr.base + offset) & STATUS_MASK;
-}
-
-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");
diff --git a/drivers/acpi/nfit.h b/drivers/acpi/nfit.h
deleted file mode 100644
index 02b9ea1e8..000000000
--- a/drivers/acpi/nfit.h
+++ /dev/null
@@ -1,223 +0,0 @@
-/*
- * NVDIMM Firmware Interface Table - NFIT
- *
- * Copyright(c) 2013-2015 Intel Corporation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of version 2 of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- */
-#ifndef __NFIT_H__
-#define __NFIT_H__
-#include <linux/workqueue.h>
-#include <linux/libnvdimm.h>
-#include <linux/types.h>
-#include <linux/uuid.h>
-#include <linux/acpi.h>
-#include <acpi/acuuid.h>
-
-/* ACPI 6.1 */
-#define UUID_NFIT_BUS "2f10e7a4-9e91-11e4-89d3-123b93f75cba"
-
-/* http://pmem.io/documents/NVDIMM_DSM_Interface_Example.pdf */
-#define UUID_NFIT_DIMM "4309ac30-0d11-11e4-9191-0800200c9a66"
-
-/* https://github.com/HewlettPackard/hpe-nvm/blob/master/Documentation/ */
-#define UUID_NFIT_DIMM_N_HPE1 "9002c334-acf3-4c0e-9642-a235f0d53bc6"
-#define UUID_NFIT_DIMM_N_HPE2 "5008664b-b758-41a0-a03c-27c2f2d04f7e"
-
-#define ACPI_NFIT_MEM_FAILED_MASK (ACPI_NFIT_MEM_SAVE_FAILED \
- | ACPI_NFIT_MEM_RESTORE_FAILED | ACPI_NFIT_MEM_FLUSH_FAILED \
- | ACPI_NFIT_MEM_NOT_ARMED)
-
-enum nfit_uuids {
- /* for simplicity alias the uuid index with the family id */
- NFIT_DEV_DIMM = NVDIMM_FAMILY_INTEL,
- NFIT_DEV_DIMM_N_HPE1 = NVDIMM_FAMILY_HPE1,
- NFIT_DEV_DIMM_N_HPE2 = NVDIMM_FAMILY_HPE2,
- NFIT_SPA_VOLATILE,
- NFIT_SPA_PM,
- NFIT_SPA_DCR,
- NFIT_SPA_BDW,
- NFIT_SPA_VDISK,
- NFIT_SPA_VCD,
- NFIT_SPA_PDISK,
- NFIT_SPA_PCD,
- NFIT_DEV_BUS,
- NFIT_UUID_MAX,
-};
-
-/*
- * Region format interface codes are stored with the interface as the
- * LSB and the function as the MSB.
- */
-#define NFIT_FIC_BYTE cpu_to_le16(0x101) /* byte-addressable energy backed */
-#define NFIT_FIC_BLK cpu_to_le16(0x201) /* block-addressable non-energy backed */
-#define NFIT_FIC_BYTEN cpu_to_le16(0x301) /* byte-addressable non-energy backed */
-
-enum {
- NFIT_BLK_READ_FLUSH = 1,
- NFIT_BLK_DCR_LATCH = 2,
- NFIT_ARS_STATUS_DONE = 0,
- NFIT_ARS_STATUS_BUSY = 1 << 16,
- NFIT_ARS_STATUS_NONE = 2 << 16,
- NFIT_ARS_STATUS_INTR = 3 << 16,
- NFIT_ARS_START_BUSY = 6,
- NFIT_ARS_CAP_NONE = 1,
- NFIT_ARS_F_OVERFLOW = 1,
- NFIT_ARS_TIMEOUT = 90,
-};
-
-struct nfit_spa {
- struct acpi_nfit_system_address *spa;
- struct list_head list;
- struct nd_region *nd_region;
- unsigned int ars_done:1;
- u32 clear_err_unit;
- u32 max_ars;
-};
-
-struct nfit_dcr {
- struct acpi_nfit_control_region *dcr;
- struct list_head list;
-};
-
-struct nfit_bdw {
- struct acpi_nfit_data_region *bdw;
- struct list_head list;
-};
-
-struct nfit_idt {
- struct acpi_nfit_interleave *idt;
- struct list_head list;
-};
-
-struct nfit_flush {
- struct acpi_nfit_flush_address *flush;
- struct list_head list;
-};
-
-struct nfit_memdev {
- struct acpi_nfit_memory_map *memdev;
- struct list_head list;
-};
-
-/* assembled tables for a given dimm/memory-device */
-struct nfit_mem {
- struct nvdimm *nvdimm;
- struct acpi_nfit_memory_map *memdev_dcr;
- struct acpi_nfit_memory_map *memdev_pmem;
- struct acpi_nfit_memory_map *memdev_bdw;
- struct acpi_nfit_control_region *dcr;
- struct acpi_nfit_data_region *bdw;
- struct acpi_nfit_system_address *spa_dcr;
- struct acpi_nfit_system_address *spa_bdw;
- struct acpi_nfit_interleave *idt_dcr;
- struct acpi_nfit_interleave *idt_bdw;
- struct nfit_flush *nfit_flush;
- struct list_head list;
- struct acpi_device *adev;
- struct acpi_nfit_desc *acpi_desc;
- unsigned long dsm_mask;
- int family;
-};
-
-struct acpi_nfit_desc {
- struct nvdimm_bus_descriptor nd_desc;
- struct acpi_table_header acpi_header;
- struct acpi_nfit_header *nfit;
- struct mutex spa_map_mutex;
- struct mutex init_mutex;
- struct list_head spa_maps;
- struct list_head memdevs;
- struct list_head flushes;
- struct list_head dimms;
- struct list_head spas;
- struct list_head dcrs;
- struct list_head bdws;
- struct list_head idts;
- struct nvdimm_bus *nvdimm_bus;
- struct device *dev;
- struct nd_cmd_ars_status *ars_status;
- size_t ars_status_size;
- struct work_struct work;
- unsigned int cancel:1;
- unsigned long dimm_cmd_force_en;
- unsigned long bus_cmd_force_en;
- int (*blk_do_io)(struct nd_blk_region *ndbr, resource_size_t dpa,
- void *iobuf, u64 len, int rw);
-};
-
-enum nd_blk_mmio_selector {
- BDW,
- DCR,
-};
-
-struct nd_blk_addr {
- union {
- void __iomem *base;
- void __pmem *aperture;
- };
-};
-
-struct nfit_blk {
- struct nfit_blk_mmio {
- struct nd_blk_addr addr;
- u64 size;
- u64 base_offset;
- u32 line_size;
- u32 num_lines;
- u32 table_size;
- struct acpi_nfit_interleave *idt;
- struct acpi_nfit_system_address *spa;
- } mmio[2];
- struct nd_region *nd_region;
- u64 bdw_offset; /* post interleave offset */
- u64 stat_offset;
- u64 cmd_offset;
- void __iomem *nvdimm_flush;
- u32 dimm_flags;
-};
-
-enum spa_map_type {
- SPA_MAP_CONTROL,
- SPA_MAP_APERTURE,
-};
-
-struct nfit_spa_mapping {
- struct acpi_nfit_desc *acpi_desc;
- struct acpi_nfit_system_address *spa;
- struct list_head list;
- struct kref kref;
- enum spa_map_type type;
- struct nd_blk_addr addr;
-};
-
-static inline struct nfit_spa_mapping *to_spa_map(struct kref *kref)
-{
- return container_of(kref, struct nfit_spa_mapping, kref);
-}
-
-static inline struct acpi_nfit_memory_map *__to_nfit_memdev(
- struct nfit_mem *nfit_mem)
-{
- if (nfit_mem->memdev_dcr)
- return nfit_mem->memdev_dcr;
- return nfit_mem->memdev_pmem;
-}
-
-static inline struct acpi_nfit_desc *to_acpi_desc(
- struct nvdimm_bus_descriptor *nd_desc)
-{
- return container_of(nd_desc, struct acpi_nfit_desc, nd_desc);
-}
-
-const u8 *to_nfit_uuid(enum nfit_uuids id);
-int acpi_nfit_init(struct acpi_nfit_desc *nfit, acpi_size sz);
-void acpi_nfit_desc_init(struct acpi_nfit_desc *acpi_desc, struct device *dev);
-#endif /* __NFIT_H__ */