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cxl for v6.4 

- Refactor the DOE infrastructure (Data Object Exchange PCI-config-cycle
   mailbox) to be a facility of the PCI core rather than the CXL core.
   This is foundational for upcoming support for PCI device-attestation and
   PCIe / CXL link encryption.
 
 - Add support for retrieving and injecting poison for CXL memory
   expanders. This enabling uses trace-events to convey CXL media error
   records to user tooling. It includes translation of device-local
   addresses (DPA) to system physical addresses (SPA) and their
   corresponding CXL region.
 
 - Fixes for decoder enumeration that missed v6.3-final
 
 - Miscellaneous fixups
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Merge tag 'cxl-for-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl

Pull compute express link updates from Dan Williams:
 "DOE support is promoted from drivers/cxl/ to drivers/pci/ with Bjorn's
  blessing, and the CXL core continues to mature its media management
  capabilities with support for listing and injecting media errors. Some
  late fixes that missed v6.3-final are also included:

   - Refactor the DOE infrastructure (Data Object Exchange
     PCI-config-cycle mailbox) to be a facility of the PCI core rather
     than the CXL core.

     This is foundational for upcoming support for PCI
     device-attestation and PCIe / CXL link encryption.

   - Add support for retrieving and injecting poison for CXL memory
     expanders.

     This enabling uses trace-events to convey CXL media error records
     to user tooling. It includes translation of device-local addresses
     (DPA) to system physical addresses (SPA) and their corresponding
     CXL region.

   - Fixes for decoder enumeration that missed v6.3-final

   - Miscellaneous fixups"

* tag 'cxl-for-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl: (38 commits)
  cxl/test: Add mock test for set_timestamp
  cxl/mbox: Update CMD_RC_TABLE
  tools/testing/cxl: Require CONFIG_DEBUG_FS
  tools/testing/cxl: Add a sysfs attr to test poison inject limits
  tools/testing/cxl: Use injected poison for get poison list
  tools/testing/cxl: Mock the Clear Poison mailbox command
  tools/testing/cxl: Mock the Inject Poison mailbox command
  cxl/mem: Add debugfs attributes for poison inject and clear
  cxl/memdev: Trace inject and clear poison as cxl_poison events
  cxl/memdev: Warn of poison inject or clear to a mapped region
  cxl/memdev: Add support for the Clear Poison mailbox command
  cxl/memdev: Add support for the Inject Poison mailbox command
  tools/testing/cxl: Mock support for Get Poison List
  cxl/trace: Add an HPA to cxl_poison trace events
  cxl/region: Provide region info to the cxl_poison trace event
  cxl/memdev: Add trigger_poison_list sysfs attribute
  cxl/trace: Add TRACE support for CXL media-error records
  cxl/mbox: Add GET_POISON_LIST mailbox command
  cxl/mbox: Initialize the poison state
  cxl/mbox: Restrict poison cmds to debugfs cxl_raw_allow_all
  ...
This commit is contained in:
Linus Torvalds 2023-04-30 11:51:51 -07:00
parent 10de638d8e fd35fdcbf7
commit 7acc137211
25 changed files with 1584 additions and 314 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
.clang-format
View File

@ -521,7 +521,6 @@ ForEachMacros:
- 'of_property_for_each_u32'
- 'pci_bus_for_each_resource'
- 'pci_dev_for_each_resource'
- 'pci_doe_for_each_off'
- 'pcl_for_each_chunk'
- 'pcl_for_each_segment'
- 'pcm_for_each_format'

35
Documentation/ABI/testing/debugfs-cxl Normal file
View File

@ -0,0 +1,35 @@
What: /sys/kernel/debug/cxl/memX/inject_poison
Date: April, 2023
KernelVersion: v6.4
Contact: linux-cxl@vger.kernel.org
Description:
(WO) When a Device Physical Address (DPA) is written to this
attribute, the memdev driver sends an inject poison command to
the device for the specified address. The DPA must be 64-byte
aligned and the length of the injected poison is 64-bytes. If
successful, the device returns poison when the address is
accessed through the CXL.mem bus. Injecting poison adds the
address to the device's Poison List and the error source is set
to Injected. In addition, the device adds a poison creation
event to its internal Informational Event log, updates the
Event Status register, and if configured, interrupts the host.
It is not an error to inject poison into an address that
already has poison present and no error is returned. The
inject_poison attribute is only visible for devices supporting
the capability.
What: /sys/kernel/debug/memX/clear_poison
Date: April, 2023
KernelVersion: v6.4
Contact: linux-cxl@vger.kernel.org
Description:
(WO) When a Device Physical Address (DPA) is written to this
attribute, the memdev driver sends a clear poison command to
the device for the specified address. Clearing poison removes
the address from the device's Poison List and writes 0 (zero)
for 64 bytes starting at address. It is not an error to clear
poison from an address that does not have poison set. If the
device cannot clear poison from the address, -ENXIO is returned.
The clear_poison attribute is only visible for devices
supporting the capability.

14
Documentation/ABI/testing/sysfs-bus-cxl
View File

@ -415,3 +415,17 @@ Description:
1), and checks that the hardware accepts the commit request.
Reading this value indicates whether the region is committed or
not.
What: /sys/bus/cxl/devices/memX/trigger_poison_list
Date: April, 2023
KernelVersion: v6.4
Contact: linux-cxl@vger.kernel.org
Description:
(WO) When a boolean 'true' is written to this attribute the
memdev driver retrieves the poison list from the device. The
list consists of addresses that are poisoned, or would result
in poison if accessed, and the source of the poison. This
attribute is only visible for devices supporting the
capability. The retrieved errors are logged as kernel
events when cxl_poison event tracing is enabled.

11
drivers/cxl/core/core.h
View File

@ -25,7 +25,12 @@ void cxl_decoder_kill_region(struct cxl_endpoint_decoder *cxled);
#define CXL_DAX_REGION_TYPE(x) (&cxl_dax_region_type)
int cxl_region_init(void);
void cxl_region_exit(void);
int cxl_get_poison_by_endpoint(struct cxl_port *port);
#else
static inline int cxl_get_poison_by_endpoint(struct cxl_port *port)
{
return 0;
}
static inline void cxl_decoder_kill_region(struct cxl_endpoint_decoder *cxled)
{
}
@ -64,4 +69,10 @@ int cxl_memdev_init(void);
void cxl_memdev_exit(void);
void cxl_mbox_init(void);
enum cxl_poison_trace_type {
CXL_POISON_TRACE_LIST,
CXL_POISON_TRACE_INJECT,
CXL_POISON_TRACE_CLEAR,
};
#endif /* __CXL_CORE_H__ */

52
drivers/cxl/core/hdm.c
View File

@ -1,6 +1,5 @@
// SPDX-License-Identifier: GPL-2.0-only
/* Copyright(c) 2022 Intel Corporation. All rights reserved. */
#include <linux/io-64-nonatomic-hi-lo.h>
#include <linux/seq_file.h>
#include <linux/device.h>
#include <linux/delay.h>
@ -93,8 +92,9 @@ static int map_hdm_decoder_regs(struct cxl_port *port, void __iomem *crb,
cxl_probe_component_regs(&port->dev, crb, &map.component_map);
if (!map.component_map.hdm_decoder.valid) {
dev_err(&port->dev, "HDM decoder registers invalid\n");
return -ENXIO;
dev_dbg(&port->dev, "HDM decoder registers not implemented\n");
/* unique error code to indicate no HDM decoder capability */
return -ENODEV;
}
return cxl_map_component_regs(&port->dev, regs, &map,
@ -130,6 +130,14 @@ static bool should_emulate_decoders(struct cxl_endpoint_dvsec_info *info)
*/
for (i = 0; i < cxlhdm->decoder_count; i++) {
ctrl = readl(hdm + CXL_HDM_DECODER0_CTRL_OFFSET(i));
dev_dbg(&info->port->dev,
"decoder%d.%d: committed: %ld base: %#x_%.8x size: %#x_%.8x\n",
info->port->id, i,
FIELD_GET(CXL_HDM_DECODER0_CTRL_COMMITTED, ctrl),
readl(hdm + CXL_HDM_DECODER0_BASE_HIGH_OFFSET(i)),
readl(hdm + CXL_HDM_DECODER0_BASE_LOW_OFFSET(i)),
readl(hdm + CXL_HDM_DECODER0_SIZE_HIGH_OFFSET(i)),
readl(hdm + CXL_HDM_DECODER0_SIZE_LOW_OFFSET(i)));
if (FIELD_GET(CXL_HDM_DECODER0_CTRL_COMMITTED, ctrl))
return false;
}
@ -269,8 +277,11 @@ static int __cxl_dpa_reserve(struct cxl_endpoint_decoder *cxled,
lockdep_assert_held_write(&cxl_dpa_rwsem);
if (!len)
goto success;
if (!len) {
dev_warn(dev, "decoder%d.%d: empty reservation attempted\n",
port->id, cxled->cxld.id);
return -EINVAL;
}
if (cxled->dpa_res) {
dev_dbg(dev, "decoder%d.%d: existing allocation %pr assigned\n",
@ -323,7 +334,6 @@ static int __cxl_dpa_reserve(struct cxl_endpoint_decoder *cxled,
cxled->mode = CXL_DECODER_MIXED;
}
success:
port->hdm_end++;
get_device(&cxled->cxld.dev);
return 0;
@ -783,8 +793,8 @@ static int init_hdm_decoder(struct cxl_port *port, struct cxl_decoder *cxld,
int *target_map, void __iomem *hdm, int which,
u64 *dpa_base, struct cxl_endpoint_dvsec_info *info)
{
u64 size, base, skip, dpa_size, lo, hi;
struct cxl_endpoint_decoder *cxled;
u64 size, base, skip, dpa_size;
bool committed;
u32 remainder;
int i, rc;
@ -799,8 +809,12 @@ static int init_hdm_decoder(struct cxl_port *port, struct cxl_decoder *cxld,
which, info);
ctrl = readl(hdm + CXL_HDM_DECODER0_CTRL_OFFSET(which));
base = ioread64_hi_lo(hdm + CXL_HDM_DECODER0_BASE_LOW_OFFSET(which));
size = ioread64_hi_lo(hdm + CXL_HDM_DECODER0_SIZE_LOW_OFFSET(which));
lo = readl(hdm + CXL_HDM_DECODER0_BASE_LOW_OFFSET(which));
hi = readl(hdm + CXL_HDM_DECODER0_BASE_HIGH_OFFSET(which));
base = (hi << 32) + lo;
lo = readl(hdm + CXL_HDM_DECODER0_SIZE_LOW_OFFSET(which));
hi = readl(hdm + CXL_HDM_DECODER0_SIZE_HIGH_OFFSET(which));
size = (hi << 32) + lo;
committed = !!(ctrl & CXL_HDM_DECODER0_CTRL_COMMITTED);
cxld->commit = cxl_decoder_commit;
cxld->reset = cxl_decoder_reset;
@ -833,6 +847,13 @@ static int init_hdm_decoder(struct cxl_port *port, struct cxl_decoder *cxld,
port->id, cxld->id);
return -ENXIO;
}
if (size == 0) {
dev_warn(&port->dev,
"decoder%d.%d: Committed with zero size\n",
port->id, cxld->id);
return -ENXIO;
}
port->commit_end = cxld->id;
} else {
/* unless / until type-2 drivers arrive, assume type-3 */
@ -855,9 +876,14 @@ static int init_hdm_decoder(struct cxl_port *port, struct cxl_decoder *cxld,
if (rc)
return rc;
dev_dbg(&port->dev, "decoder%d.%d: range: %#llx-%#llx iw: %d ig: %d\n",
port->id, cxld->id, cxld->hpa_range.start, cxld->hpa_range.end,
cxld->interleave_ways, cxld->interleave_granularity);
if (!info) {
target_list.value =
ioread64_hi_lo(hdm + CXL_HDM_DECODER0_TL_LOW(which));
lo = readl(hdm + CXL_HDM_DECODER0_TL_LOW(which));
hi = readl(hdm + CXL_HDM_DECODER0_TL_HIGH(which));
target_list.value = (hi << 32) + lo;
for (i = 0; i < cxld->interleave_ways; i++)
target_map[i] = target_list.target_id[i];
@ -874,7 +900,9 @@ static int init_hdm_decoder(struct cxl_port *port, struct cxl_decoder *cxld,
port->id, cxld->id, size, cxld->interleave_ways);
return -ENXIO;
}
skip = ioread64_hi_lo(hdm + CXL_HDM_DECODER0_SKIP_LOW(which));
lo = readl(hdm + CXL_HDM_DECODER0_SKIP_LOW(which));
hi = readl(hdm + CXL_HDM_DECODER0_SKIP_HIGH(which));
skip = (hi << 32) + lo;
cxled = to_cxl_endpoint_decoder(&cxld->dev);
rc = devm_cxl_dpa_reserve(cxled, *dpa_base + skip, dpa_size, skip);
if (rc) {

149
drivers/cxl/core/mbox.c
View File

@ -1,10 +1,11 @@
// SPDX-License-Identifier: GPL-2.0-only
/* Copyright(c) 2020 Intel Corporation. All rights reserved. */
#include <linux/io-64-nonatomic-lo-hi.h>
#include <linux/security.h>
#include <linux/debugfs.h>
#include <linux/ktime.h>
#include <linux/mutex.h>
#include <asm/unaligned.h>
#include <cxlpci.h>
#include <cxlmem.h>
#include <cxl.h>
@ -61,12 +62,7 @@ static struct cxl_mem_command cxl_mem_commands[CXL_MEM_COMMAND_ID_MAX] = {
CXL_CMD(SET_ALERT_CONFIG, 0xc, 0, 0),
CXL_CMD(GET_SHUTDOWN_STATE, 0, 0x1, 0),
CXL_CMD(SET_SHUTDOWN_STATE, 0x1, 0, 0),
CXL_CMD(GET_POISON, 0x10, CXL_VARIABLE_PAYLOAD, 0),
CXL_CMD(INJECT_POISON, 0x8, 0, 0),
CXL_CMD(CLEAR_POISON, 0x48, 0, 0),
CXL_CMD(GET_SCAN_MEDIA_CAPS, 0x10, 0x4, 0),
CXL_CMD(SCAN_MEDIA, 0x11, 0, 0),
CXL_CMD(GET_SCAN_MEDIA, 0, CXL_VARIABLE_PAYLOAD, 0),
};
/*
@ -87,6 +83,9 @@ static struct cxl_mem_command cxl_mem_commands[CXL_MEM_COMMAND_ID_MAX] = {
*
* CXL_MBOX_OP_[GET_]SCAN_MEDIA: The kernel provides a native error list that
* is kept up to date with patrol notifications and error management.
*
* CXL_MBOX_OP_[GET_,INJECT_,CLEAR_]POISON: These commands require kernel
* driver orchestration for safety.
*/
static u16 cxl_disabled_raw_commands[] = {
CXL_MBOX_OP_ACTIVATE_FW,
@ -95,6 +94,9 @@ static u16 cxl_disabled_raw_commands[] = {
CXL_MBOX_OP_SET_SHUTDOWN_STATE,
CXL_MBOX_OP_SCAN_MEDIA,
CXL_MBOX_OP_GET_SCAN_MEDIA,
CXL_MBOX_OP_GET_POISON,
CXL_MBOX_OP_INJECT_POISON,
CXL_MBOX_OP_CLEAR_POISON,
};
/*
@ -119,6 +121,43 @@ static bool cxl_is_security_command(u16 opcode)
return false;
}
static bool cxl_is_poison_command(u16 opcode)
{
#define CXL_MBOX_OP_POISON_CMDS 0x43
if ((opcode >> 8) == CXL_MBOX_OP_POISON_CMDS)
return true;
return false;
}
static void cxl_set_poison_cmd_enabled(struct cxl_poison_state *poison,
u16 opcode)
{
switch (opcode) {
case CXL_MBOX_OP_GET_POISON:
set_bit(CXL_POISON_ENABLED_LIST, poison->enabled_cmds);
break;
case CXL_MBOX_OP_INJECT_POISON:
set_bit(CXL_POISON_ENABLED_INJECT, poison->enabled_cmds);
break;
case CXL_MBOX_OP_CLEAR_POISON:
set_bit(CXL_POISON_ENABLED_CLEAR, poison->enabled_cmds);
break;
case CXL_MBOX_OP_GET_SCAN_MEDIA_CAPS:
set_bit(CXL_POISON_ENABLED_SCAN_CAPS, poison->enabled_cmds);
break;
case CXL_MBOX_OP_SCAN_MEDIA:
set_bit(CXL_POISON_ENABLED_SCAN_MEDIA, poison->enabled_cmds);
break;
case CXL_MBOX_OP_GET_SCAN_MEDIA:
set_bit(CXL_POISON_ENABLED_SCAN_RESULTS, poison->enabled_cmds);
break;
default:
break;
}
}
static struct cxl_mem_command *cxl_mem_find_command(u16 opcode)
{
struct cxl_mem_command *c;
@ -634,13 +673,18 @@ static void cxl_walk_cel(struct cxl_dev_state *cxlds, size_t size, u8 *cel)
u16 opcode = le16_to_cpu(cel_entry[i].opcode);
struct cxl_mem_command *cmd = cxl_mem_find_command(opcode);
if (!cmd) {
if (!cmd && !cxl_is_poison_command(opcode)) {
dev_dbg(cxlds->dev,
"Opcode 0x%04x unsupported by driver\n", opcode);
continue;
}
if (cmd)
set_bit(cmd->info.id, cxlds->enabled_cmds);
if (cxl_is_poison_command(opcode))
cxl_set_poison_cmd_enabled(&cxlds->poison, opcode);
dev_dbg(cxlds->dev, "Opcode 0x%04x enabled\n", opcode);
}
}
@ -994,6 +1038,7 @@ int cxl_dev_state_identify(struct cxl_dev_state *cxlds)
/* See CXL 2.0 Table 175 Identify Memory Device Output Payload */
struct cxl_mbox_identify id;
struct cxl_mbox_cmd mbox_cmd;
u32 val;
int rc;
mbox_cmd = (struct cxl_mbox_cmd) {
@ -1017,6 +1062,11 @@ int cxl_dev_state_identify(struct cxl_dev_state *cxlds)
cxlds->lsa_size = le32_to_cpu(id.lsa_size);
memcpy(cxlds->firmware_version, id.fw_revision, sizeof(id.fw_revision));
if (test_bit(CXL_POISON_ENABLED_LIST, cxlds->poison.enabled_cmds)) {
val = get_unaligned_le24(id.poison_list_max_mer);
cxlds->poison.max_errors = min_t(u32, val, CXL_POISON_LIST_MAX);
}
return 0;
}
EXPORT_SYMBOL_NS_GPL(cxl_dev_state_identify, CXL);
@ -1107,6 +1157,91 @@ int cxl_set_timestamp(struct cxl_dev_state *cxlds)
}
EXPORT_SYMBOL_NS_GPL(cxl_set_timestamp, CXL);
int cxl_mem_get_poison(struct cxl_memdev *cxlmd, u64 offset, u64 len,
struct cxl_region *cxlr)
{
struct cxl_dev_state *cxlds = cxlmd->cxlds;
struct cxl_mbox_poison_out *po;
struct cxl_mbox_poison_in pi;
struct cxl_mbox_cmd mbox_cmd;
int nr_records = 0;
int rc;
rc = mutex_lock_interruptible(&cxlds->poison.lock);
if (rc)
return rc;
po = cxlds->poison.list_out;
pi.offset = cpu_to_le64(offset);
pi.length = cpu_to_le64(len / CXL_POISON_LEN_MULT);
mbox_cmd = (struct cxl_mbox_cmd) {
.opcode = CXL_MBOX_OP_GET_POISON,
.size_in = sizeof(pi),
.payload_in = &pi,
.size_out = cxlds->payload_size,
.payload_out = po,
.min_out = struct_size(po, record, 0),
};
do {
rc = cxl_internal_send_cmd(cxlds, &mbox_cmd);
if (rc)
break;
for (int i = 0; i < le16_to_cpu(po->count); i++)
trace_cxl_poison(cxlmd, cxlr, &po->record[i],
po->flags, po->overflow_ts,
CXL_POISON_TRACE_LIST);
/* Protect against an uncleared _FLAG_MORE */
nr_records = nr_records + le16_to_cpu(po->count);
if (nr_records >= cxlds->poison.max_errors) {
dev_dbg(&cxlmd->dev, "Max Error Records reached: %d\n",
nr_records);
break;
}
} while (po->flags & CXL_POISON_FLAG_MORE);
mutex_unlock(&cxlds->poison.lock);
return rc;
}
EXPORT_SYMBOL_NS_GPL(cxl_mem_get_poison, CXL);
static void free_poison_buf(void *buf)
{
kvfree(buf);
}
/* Get Poison List output buffer is protected by cxlds->poison.lock */
static int cxl_poison_alloc_buf(struct cxl_dev_state *cxlds)
{
cxlds->poison.list_out = kvmalloc(cxlds->payload_size, GFP_KERNEL);
if (!cxlds->poison.list_out)
return -ENOMEM;
return devm_add_action_or_reset(cxlds->dev, free_poison_buf,
cxlds->poison.list_out);
}
int cxl_poison_state_init(struct cxl_dev_state *cxlds)
{
int rc;
if (!test_bit(CXL_POISON_ENABLED_LIST, cxlds->poison.enabled_cmds))
return 0;
rc = cxl_poison_alloc_buf(cxlds);
if (rc) {
clear_bit(CXL_POISON_ENABLED_LIST, cxlds->poison.enabled_cmds);
return rc;
}
mutex_init(&cxlds->poison.lock);
return 0;
}
EXPORT_SYMBOL_NS_GPL(cxl_poison_state_init, CXL);
struct cxl_dev_state *cxl_dev_state_create(struct device *dev)
{
struct cxl_dev_state *cxlds;

227
drivers/cxl/core/memdev.c
View File

@ -6,6 +6,7 @@
#include <linux/idr.h>
#include <linux/pci.h>
#include <cxlmem.h>
#include "trace.h"
#include "core.h"
static DECLARE_RWSEM(cxl_memdev_rwsem);
@ -106,6 +107,232 @@ static ssize_t numa_node_show(struct device *dev, struct device_attribute *attr,
}
static DEVICE_ATTR_RO(numa_node);
static int cxl_get_poison_by_memdev(struct cxl_memdev *cxlmd)
{
struct cxl_dev_state *cxlds = cxlmd->cxlds;
u64 offset, length;
int rc = 0;
/* CXL 3.0 Spec 8.2.9.8.4.1 Separate pmem and ram poison requests */
if (resource_size(&cxlds->pmem_res)) {
offset = cxlds->pmem_res.start;
length = resource_size(&cxlds->pmem_res);
rc = cxl_mem_get_poison(cxlmd, offset, length, NULL);
if (rc)
return rc;
}
if (resource_size(&cxlds->ram_res)) {
offset = cxlds->ram_res.start;
length = resource_size(&cxlds->ram_res);
rc = cxl_mem_get_poison(cxlmd, offset, length, NULL);
/*
* Invalid Physical Address is not an error for
* volatile addresses. Device support is optional.
*/
if (rc == -EFAULT)
rc = 0;
}
return rc;
}
int cxl_trigger_poison_list(struct cxl_memdev *cxlmd)
{
struct cxl_port *port;
int rc;
port = dev_get_drvdata(&cxlmd->dev);
if (!port || !is_cxl_endpoint(port))
return -EINVAL;
rc = down_read_interruptible(&cxl_dpa_rwsem);
if (rc)
return rc;
if (port->commit_end == -1) {
/* No regions mapped to this memdev */
rc = cxl_get_poison_by_memdev(cxlmd);
} else {
/* Regions mapped, collect poison by endpoint */
rc = cxl_get_poison_by_endpoint(port);
}
up_read(&cxl_dpa_rwsem);
return rc;
}
EXPORT_SYMBOL_NS_GPL(cxl_trigger_poison_list, CXL);
struct cxl_dpa_to_region_context {
struct cxl_region *cxlr;
u64 dpa;
};
static int __cxl_dpa_to_region(struct device *dev, void *arg)
{
struct cxl_dpa_to_region_context *ctx = arg;
struct cxl_endpoint_decoder *cxled;
u64 dpa = ctx->dpa;
if (!is_endpoint_decoder(dev))
return 0;
cxled = to_cxl_endpoint_decoder(dev);
if (!cxled->dpa_res || !resource_size(cxled->dpa_res))
return 0;
if (dpa > cxled->dpa_res->end || dpa < cxled->dpa_res->start)
return 0;
dev_dbg(dev, "dpa:0x%llx mapped in region:%s\n", dpa,
dev_name(&cxled->cxld.region->dev));
ctx->cxlr = cxled->cxld.region;
return 1;
}
static struct cxl_region *cxl_dpa_to_region(struct cxl_memdev *cxlmd, u64 dpa)
{
struct cxl_dpa_to_region_context ctx;
struct cxl_port *port;
ctx = (struct cxl_dpa_to_region_context) {
.dpa = dpa,
};
port = dev_get_drvdata(&cxlmd->dev);
if (port && is_cxl_endpoint(port) && port->commit_end != -1)
device_for_each_child(&port->dev, &ctx, __cxl_dpa_to_region);
return ctx.cxlr;
}
static int cxl_validate_poison_dpa(struct cxl_memdev *cxlmd, u64 dpa)
{
struct cxl_dev_state *cxlds = cxlmd->cxlds;
if (!IS_ENABLED(CONFIG_DEBUG_FS))
return 0;
if (!resource_size(&cxlds->dpa_res)) {
dev_dbg(cxlds->dev, "device has no dpa resource\n");
return -EINVAL;
}
if (dpa < cxlds->dpa_res.start || dpa > cxlds->dpa_res.end) {
dev_dbg(cxlds->dev, "dpa:0x%llx not in resource:%pR\n",
dpa, &cxlds->dpa_res);
return -EINVAL;
}
if (!IS_ALIGNED(dpa, 64)) {
dev_dbg(cxlds->dev, "dpa:0x%llx is not 64-byte aligned\n", dpa);
return -EINVAL;
}
return 0;
}
int cxl_inject_poison(struct cxl_memdev *cxlmd, u64 dpa)
{
struct cxl_dev_state *cxlds = cxlmd->cxlds;
struct cxl_mbox_inject_poison inject;
struct cxl_poison_record record;
struct cxl_mbox_cmd mbox_cmd;
struct cxl_region *cxlr;
int rc;
if (!IS_ENABLED(CONFIG_DEBUG_FS))
return 0;
rc = down_read_interruptible(&cxl_dpa_rwsem);
if (rc)
return rc;
rc = cxl_validate_poison_dpa(cxlmd, dpa);
if (rc)
goto out;
inject.address = cpu_to_le64(dpa);
mbox_cmd = (struct cxl_mbox_cmd) {
.opcode = CXL_MBOX_OP_INJECT_POISON,
.size_in = sizeof(inject),
.payload_in = &inject,
};
rc = cxl_internal_send_cmd(cxlds, &mbox_cmd);
if (rc)
goto out;
cxlr = cxl_dpa_to_region(cxlmd, dpa);
if (cxlr)
dev_warn_once(cxlds->dev,
"poison inject dpa:%#llx region: %s\n", dpa,
dev_name(&cxlr->dev));
record = (struct cxl_poison_record) {
.address = cpu_to_le64(dpa),
.length = cpu_to_le32(1),
};
trace_cxl_poison(cxlmd, cxlr, &record, 0, 0, CXL_POISON_TRACE_INJECT);
out:
up_read(&cxl_dpa_rwsem);
return rc;
}
EXPORT_SYMBOL_NS_GPL(cxl_inject_poison, CXL);
int cxl_clear_poison(struct cxl_memdev *cxlmd, u64 dpa)
{
struct cxl_dev_state *cxlds = cxlmd->cxlds;
struct cxl_mbox_clear_poison clear;
struct cxl_poison_record record;
struct cxl_mbox_cmd mbox_cmd;
struct cxl_region *cxlr;
int rc;
if (!IS_ENABLED(CONFIG_DEBUG_FS))
return 0;
rc = down_read_interruptible(&cxl_dpa_rwsem);
if (rc)
return rc;
rc = cxl_validate_poison_dpa(cxlmd, dpa);
if (rc)
goto out;
/*
* In CXL 3.0 Spec 8.2.9.8.4.3, the Clear Poison mailbox command
* is defined to accept 64 bytes of write-data, along with the
* address to clear. This driver uses zeroes as write-data.
*/
clear = (struct cxl_mbox_clear_poison) {
.address = cpu_to_le64(dpa)
};
mbox_cmd = (struct cxl_mbox_cmd) {
.opcode = CXL_MBOX_OP_CLEAR_POISON,
.size_in = sizeof(clear),
.payload_in = &clear,
};
rc = cxl_internal_send_cmd(cxlds, &mbox_cmd);
if (rc)
goto out;
cxlr = cxl_dpa_to_region(cxlmd, dpa);
if (cxlr)
dev_warn_once(cxlds->dev, "poison clear dpa:%#llx region: %s\n",
dpa, dev_name(&cxlr->dev));
record = (struct cxl_poison_record) {
.address = cpu_to_le64(dpa),
.length = cpu_to_le32(1),
};
trace_cxl_poison(cxlmd, cxlr, &record, 0, 0, CXL_POISON_TRACE_CLEAR);
out:
up_read(&cxl_dpa_rwsem);
return rc;
}
EXPORT_SYMBOL_NS_GPL(cxl_clear_poison, CXL);
static struct attribute *cxl_memdev_attributes[] = {
&dev_attr_serial.attr,
&dev_attr_firmware_version.attr,

133
drivers/cxl/core/pci.c
View File

@ -441,27 +441,6 @@ EXPORT_SYMBOL_NS_GPL(cxl_hdm_decode_init, CXL);
#define CXL_DOE_TABLE_ACCESS_LAST_ENTRY 0xffff
#define CXL_DOE_PROTOCOL_TABLE_ACCESS 2
static struct pci_doe_mb *find_cdat_doe(struct device *uport)
{
struct cxl_memdev *cxlmd;
struct cxl_dev_state *cxlds;
unsigned long index;
void *entry;
cxlmd = to_cxl_memdev(uport);
cxlds = cxlmd->cxlds;
xa_for_each(&cxlds->doe_mbs, index, entry) {
struct pci_doe_mb *cur = entry;
if (pci_doe_supports_prot(cur, PCI_DVSEC_VENDOR_ID_CXL,
CXL_DOE_PROTOCOL_TABLE_ACCESS))
return cur;
}
return NULL;
}
#define CDAT_DOE_REQ(entry_handle) cpu_to_le32 \
(FIELD_PREP(CXL_DOE_TABLE_ACCESS_REQ_CODE, \
CXL_DOE_TABLE_ACCESS_REQ_CODE_READ) | \
@ -469,51 +448,26 @@ static struct pci_doe_mb *find_cdat_doe(struct device *uport)
CXL_DOE_TABLE_ACCESS_TABLE_TYPE_CDATA) | \
FIELD_PREP(CXL_DOE_TABLE_ACCESS_ENTRY_HANDLE, (entry_handle)))
static void cxl_doe_task_complete(struct pci_doe_task *task)
{
complete(task->private);
}
struct cdat_doe_task {
__le32 request_pl;
__le32 response_pl[32];
struct completion c;
struct pci_doe_task task;
};
#define DECLARE_CDAT_DOE_TASK(req, cdt) \
struct cdat_doe_task cdt = { \
.c = COMPLETION_INITIALIZER_ONSTACK(cdt.c), \
.request_pl = req, \
.task = { \
.prot.vid = PCI_DVSEC_VENDOR_ID_CXL, \
.prot.type = CXL_DOE_PROTOCOL_TABLE_ACCESS, \
.request_pl = &cdt.request_pl, \
.request_pl_sz = sizeof(cdt.request_pl), \
.response_pl = cdt.response_pl, \
.response_pl_sz = sizeof(cdt.response_pl), \
.complete = cxl_doe_task_complete, \
.private = &cdt.c, \
} \
}
static int cxl_cdat_get_length(struct device *dev,
struct pci_doe_mb *cdat_doe,
size_t *length)
{
DECLARE_CDAT_DOE_TASK(CDAT_DOE_REQ(0), t);
__le32 request = CDAT_DOE_REQ(0);
__le32 response[2];
int rc;
rc = pci_doe_submit_task(cdat_doe, &t.task);
rc = pci_doe(cdat_doe, PCI_DVSEC_VENDOR_ID_CXL,
CXL_DOE_PROTOCOL_TABLE_ACCESS,
&request, sizeof(request),
&response, sizeof(response));
if (rc < 0) {
dev_err(dev, "DOE submit failed: %d", rc);
dev_err(dev, "DOE failed: %d", rc);
return rc;
}
wait_for_completion(&t.c);
if (t.task.rv < 2 * sizeof(__le32))
if (rc < sizeof(response))
return -EIO;
*length = le32_to_cpu(t.response_pl[1]);
*length = le32_to_cpu(response[1]);
dev_dbg(dev, "CDAT length %zu\n", *length);
return 0;
@ -521,51 +475,55 @@ static int cxl_cdat_get_length(struct device *dev,
static int cxl_cdat_read_table(struct device *dev,
struct pci_doe_mb *cdat_doe,
struct cxl_cdat *cdat)
void *cdat_table, size_t *cdat_length)
{
size_t length = cdat->length;
__le32 *data = cdat->table;
size_t length = *cdat_length + sizeof(__le32);
__le32 *data = cdat_table;
int entry_handle = 0;
__le32 saved_dw = 0;
do {
DECLARE_CDAT_DOE_TASK(CDAT_DOE_REQ(entry_handle), t);
__le32 request = CDAT_DOE_REQ(entry_handle);
struct cdat_entry_header *entry;
size_t entry_dw;
int rc;
rc = pci_doe_submit_task(cdat_doe, &t.task);
rc = pci_doe(cdat_doe, PCI_DVSEC_VENDOR_ID_CXL,
CXL_DOE_PROTOCOL_TABLE_ACCESS,
&request, sizeof(request),
data, length);
if (rc < 0) {
dev_err(dev, "DOE submit failed: %d", rc);
dev_err(dev, "DOE failed: %d", rc);
return rc;
}
wait_for_completion(&t.c);
/* 1 DW Table Access Response Header + CDAT entry */
entry = (struct cdat_entry_header *)(t.response_pl + 1);
entry = (struct cdat_entry_header *)(data + 1);
if ((entry_handle == 0 &&
t.task.rv != sizeof(__le32) + sizeof(struct cdat_header)) ||
rc != sizeof(__le32) + sizeof(struct cdat_header)) ||
(entry_handle > 0 &&
(t.task.rv < sizeof(__le32) + sizeof(*entry) ||
t.task.rv != sizeof(__le32) + le16_to_cpu(entry->length))))
(rc < sizeof(__le32) + sizeof(*entry) ||
rc != sizeof(__le32) + le16_to_cpu(entry->length))))
return -EIO;
/* Get the CXL table access header entry handle */
entry_handle = FIELD_GET(CXL_DOE_TABLE_ACCESS_ENTRY_HANDLE,
le32_to_cpu(t.response_pl[0]));
entry_dw = t.task.rv / sizeof(__le32);
le32_to_cpu(data[0]));
entry_dw = rc / sizeof(__le32);
/* Skip Header */
entry_dw -= 1;
entry_dw = min(length / sizeof(__le32), entry_dw);
/* Prevent length < 1 DW from causing a buffer overflow */
if (entry_dw) {
memcpy(data, entry, entry_dw * sizeof(__le32));
/*
* Table Access Response Header overwrote the last DW of
* previous entry, so restore that DW
*/
*data = saved_dw;
length -= entry_dw * sizeof(__le32);
data += entry_dw;
}
saved_dw = *data;
} while (entry_handle != CXL_DOE_TABLE_ACCESS_LAST_ENTRY);
/* Length in CDAT header may exceed concatenation of CDAT entries */
cdat->length -= length;
*cdat_length -= length - sizeof(__le32);
return 0;
}
@ -578,13 +536,19 @@ static int cxl_cdat_read_table(struct device *dev,
*/
void read_cdat_data(struct cxl_port *port)
{
struct pci_doe_mb *cdat_doe;
struct cxl_memdev *cxlmd = to_cxl_memdev(port->uport);
struct device *host = cxlmd->dev.parent;
struct device *dev = &port->dev;
struct device *uport = port->uport;
struct pci_doe_mb *cdat_doe;
size_t cdat_length;
void *cdat_table;
int rc;
cdat_doe = find_cdat_doe(uport);
if (!dev_is_pci(host))
return;
cdat_doe = pci_find_doe_mailbox(to_pci_dev(host),
PCI_DVSEC_VENDOR_ID_CXL,
CXL_DOE_PROTOCOL_TABLE_ACCESS);
if (!cdat_doe) {
dev_dbg(dev, "No CDAT mailbox\n");
return;
@ -597,19 +561,20 @@ void read_cdat_data(struct cxl_port *port)
return;
}
port->cdat.table = devm_kzalloc(dev, cdat_length, GFP_KERNEL);
if (!port->cdat.table)
cdat_table = devm_kzalloc(dev, cdat_length + sizeof(__le32),
GFP_KERNEL);
if (!cdat_table)
return;
port->cdat.length = cdat_length;
rc = cxl_cdat_read_table(dev, cdat_doe, &port->cdat);
rc = cxl_cdat_read_table(dev, cdat_doe, cdat_table, &cdat_length);
if (rc) {
/* Don't leave table data allocated on error */
devm_kfree(dev, port->cdat.table);
port->cdat.table = NULL;
port->cdat.length = 0;
devm_kfree(dev, cdat_table);
dev_err(dev, "CDAT data read error\n");
}
port->cdat.table = cdat_table + sizeof(__le32);
port->cdat.length = cdat_length;
}
EXPORT_SYMBOL_NS_GPL(read_cdat_data, CXL);

1
drivers/cxl/core/port.c
View File

@ -1,6 +1,5 @@
// SPDX-License-Identifier: GPL-2.0-only
/* Copyright(c) 2020 Intel Corporation. All rights reserved. */
#include <linux/io-64-nonatomic-lo-hi.h>
#include <linux/memregion.h>
#include <linux/workqueue.h>
#include <linux/debugfs.h>

124
drivers/cxl/core/region.c
View File

@ -2238,6 +2238,130 @@ struct cxl_pmem_region *to_cxl_pmem_region(struct device *dev)
}
EXPORT_SYMBOL_NS_GPL(to_cxl_pmem_region, CXL);
struct cxl_poison_context {
struct cxl_port *port;
enum cxl_decoder_mode mode;
u64 offset;
};
static int cxl_get_poison_unmapped(struct cxl_memdev *cxlmd,
struct cxl_poison_context *ctx)
{
struct cxl_dev_state *cxlds = cxlmd->cxlds;
u64 offset, length;
int rc = 0;
/*
* Collect poison for the remaining unmapped resources
* after poison is collected by committed endpoints.
*
* Knowing that PMEM must always follow RAM, get poison
* for unmapped resources based on the last decoder's mode:
* ram: scan remains of ram range, then any pmem range
* pmem: scan remains of pmem range
*/
if (ctx->mode == CXL_DECODER_RAM) {
offset = ctx->offset;
length = resource_size(&cxlds->ram_res) - offset;
rc = cxl_mem_get_poison(cxlmd, offset, length, NULL);
if (rc == -EFAULT)
rc = 0;
if (rc)
return rc;
}
if (ctx->mode == CXL_DECODER_PMEM) {
offset = ctx->offset;
length = resource_size(&cxlds->dpa_res) - offset;
if (!length)
return 0;
} else if (resource_size(&cxlds->pmem_res)) {
offset = cxlds->pmem_res.start;
length = resource_size(&cxlds->pmem_res);
} else {
return 0;
}
return cxl_mem_get_poison(cxlmd, offset, length, NULL);
}
static int poison_by_decoder(struct device *dev, void *arg)
{
struct cxl_poison_context *ctx = arg;
struct cxl_endpoint_decoder *cxled;
struct cxl_memdev *cxlmd;
u64 offset, length;
int rc = 0;
if (!is_endpoint_decoder(dev))
return rc;
cxled = to_cxl_endpoint_decoder(dev);
if (!cxled->dpa_res || !resource_size(cxled->dpa_res))
return rc;
/*
* Regions are only created with single mode decoders: pmem or ram.
* Linux does not support mixed mode decoders. This means that
* reading poison per endpoint decoder adheres to the requirement
* that poison reads of pmem and ram must be separated.
* CXL 3.0 Spec 8.2.9.8.4.1
*/
if (cxled->mode == CXL_DECODER_MIXED) {
dev_dbg(dev, "poison list read unsupported in mixed mode\n");
return rc;
}
cxlmd = cxled_to_memdev(cxled);
if (cxled->skip) {
offset = cxled->dpa_res->start - cxled->skip;
length = cxled->skip;
rc = cxl_mem_get_poison(cxlmd, offset, length, NULL);
if (rc == -EFAULT && cxled->mode == CXL_DECODER_RAM)
rc = 0;
if (rc)
return rc;
}
offset = cxled->dpa_res->start;
length = cxled->dpa_res->end - offset + 1;
rc = cxl_mem_get_poison(cxlmd, offset, length, cxled->cxld.region);
if (rc == -EFAULT && cxled->mode == CXL_DECODER_RAM)
rc = 0;
if (rc)
return rc;
/* Iterate until commit_end is reached */
if (cxled->cxld.id == ctx->port->commit_end) {
ctx->offset = cxled->dpa_res->end + 1;
ctx->mode = cxled->mode;
return 1;
}
return 0;
}
int cxl_get_poison_by_endpoint(struct cxl_port *port)
{
struct cxl_poison_context ctx;
int rc = 0;
rc = down_read_interruptible(&cxl_region_rwsem);
if (rc)
return rc;
ctx = (struct cxl_poison_context) {
.port = port
};
rc = device_for_each_child(&port->dev, &ctx, poison_by_decoder);
if (rc == 1)
rc = cxl_get_poison_unmapped(to_cxl_memdev(port->uport), &ctx);
up_read(&cxl_region_rwsem);
return rc;
}
static struct lock_class_key cxl_pmem_region_key;
static struct cxl_pmem_region *cxl_pmem_region_alloc(struct cxl_region *cxlr)

94
drivers/cxl/core/trace.c
View File

@ -1,5 +1,99 @@
// SPDX-License-Identifier: GPL-2.0-only
/* Copyright(c) 2022 Intel Corporation. All rights reserved. */
#include <cxl.h>
#include "core.h"
#define CREATE_TRACE_POINTS
#include "trace.h"
static bool cxl_is_hpa_in_range(u64 hpa, struct cxl_region *cxlr, int pos)
{
struct cxl_region_params *p = &cxlr->params;
int gran = p->interleave_granularity;
int ways = p->interleave_ways;
u64 offset;
/* Is the hpa within this region at all */
if (hpa < p->res->start || hpa > p->res->end) {
dev_dbg(&cxlr->dev,
"Addr trans fail: hpa 0x%llx not in region\n", hpa);
return false;
}
/* Is the hpa in an expected chunk for its pos(-ition) */
offset = hpa - p->res->start;
offset = do_div(offset, gran * ways);
if ((offset >= pos * gran) && (offset < (pos + 1) * gran))
return true;
dev_dbg(&cxlr->dev,
"Addr trans fail: hpa 0x%llx not in expected chunk\n", hpa);
return false;
}
static u64 cxl_dpa_to_hpa(u64 dpa, struct cxl_region *cxlr,
struct cxl_endpoint_decoder *cxled)
{
u64 dpa_offset, hpa_offset, bits_upper, mask_upper, hpa;
struct cxl_region_params *p = &cxlr->params;
int pos = cxled->pos;
u16 eig = 0;
u8 eiw = 0;
ways_to_eiw(p->interleave_ways, &eiw);
granularity_to_eig(p->interleave_granularity, &eig);
/*
* The device position in the region interleave set was removed
* from the offset at HPA->DPA translation. To reconstruct the
* HPA, place the 'pos' in the offset.
*
* The placement of 'pos' in the HPA is determined by interleave
* ways and granularity and is defined in the CXL Spec 3.0 Section
* 8.2.4.19.13 Implementation Note: Device Decode Logic
*/
/* Remove the dpa base */
dpa_offset = dpa - cxl_dpa_resource_start(cxled);
mask_upper = GENMASK_ULL(51, eig + 8);
if (eiw < 8) {
hpa_offset = (dpa_offset & mask_upper) << eiw;
hpa_offset |= pos << (eig + 8);
} else {
bits_upper = (dpa_offset & mask_upper) >> (eig + 8);
bits_upper = bits_upper * 3;
hpa_offset = ((bits_upper << (eiw - 8)) + pos) << (eig + 8);
}
/* The lower bits remain unchanged */
hpa_offset |= dpa_offset & GENMASK_ULL(eig + 7, 0);
/* Apply the hpa_offset to the region base address */
hpa = hpa_offset + p->res->start;
if (!cxl_is_hpa_in_range(hpa, cxlr, cxled->pos))
return ULLONG_MAX;
return hpa;
}
u64 cxl_trace_hpa(struct cxl_region *cxlr, struct cxl_memdev *cxlmd,
u64 dpa)
{
struct cxl_region_params *p = &cxlr->params;
struct cxl_endpoint_decoder *cxled = NULL;
for (int i = 0; i < p->nr_targets; i++) {
cxled = p->targets[i];
if (cxlmd == cxled_to_memdev(cxled))
break;
}
if (!cxled || cxlmd != cxled_to_memdev(cxled))
return ULLONG_MAX;
return cxl_dpa_to_hpa(dpa, cxlr, cxled);
}

103
drivers/cxl/core/trace.h
View File

@ -7,10 +7,12 @@
#define _CXL_EVENTS_H
#include <linux/tracepoint.h>
#include <linux/pci.h>
#include <asm-generic/unaligned.h>
#include <cxl.h>
#include <cxlmem.h>
#include "core.h"
#define CXL_RAS_UC_CACHE_DATA_PARITY BIT(0)
#define CXL_RAS_UC_CACHE_ADDR_PARITY BIT(1)
@ -600,6 +602,107 @@ TRACE_EVENT(cxl_memory_module,
)
);
#define show_poison_trace_type(type) \
__print_symbolic(type, \
{ CXL_POISON_TRACE_LIST, "List" }, \
{ CXL_POISON_TRACE_INJECT, "Inject" }, \
{ CXL_POISON_TRACE_CLEAR, "Clear" })
#define __show_poison_source(source) \
__print_symbolic(source, \
{ CXL_POISON_SOURCE_UNKNOWN, "Unknown" }, \
{ CXL_POISON_SOURCE_EXTERNAL, "External" }, \
{ CXL_POISON_SOURCE_INTERNAL, "Internal" }, \
{ CXL_POISON_SOURCE_INJECTED, "Injected" }, \
{ CXL_POISON_SOURCE_VENDOR, "Vendor" })
#define show_poison_source(source) \
(((source > CXL_POISON_SOURCE_INJECTED) && \
(source != CXL_POISON_SOURCE_VENDOR)) ? "Reserved" \
: __show_poison_source(source))
#define show_poison_flags(flags) \
__print_flags(flags, "|", \
{ CXL_POISON_FLAG_MORE, "More" }, \
{ CXL_POISON_FLAG_OVERFLOW, "Overflow" }, \
{ CXL_POISON_FLAG_SCANNING, "Scanning" })
#define __cxl_poison_addr(record) \
(le64_to_cpu(record->address))
#define cxl_poison_record_dpa(record) \
(__cxl_poison_addr(record) & CXL_POISON_START_MASK)
#define cxl_poison_record_source(record) \
(__cxl_poison_addr(record) & CXL_POISON_SOURCE_MASK)
#define cxl_poison_record_dpa_length(record) \
(le32_to_cpu(record->length) * CXL_POISON_LEN_MULT)
#define cxl_poison_overflow(flags, time) \
(flags & CXL_POISON_FLAG_OVERFLOW ? le64_to_cpu(time) : 0)
u64 cxl_trace_hpa(struct cxl_region *cxlr, struct cxl_memdev *memdev, u64 dpa);
TRACE_EVENT(cxl_poison,
TP_PROTO(struct cxl_memdev *cxlmd, struct cxl_region *region,
const struct cxl_poison_record *record, u8 flags,
__le64 overflow_ts, enum cxl_poison_trace_type trace_type),
TP_ARGS(cxlmd, region, record, flags, overflow_ts, trace_type),
TP_STRUCT__entry(
__string(memdev, dev_name(&cxlmd->dev))
__string(host, dev_name(cxlmd->dev.parent))
__field(u64, serial)
__field(u8, trace_type)
__string(region, region)
__field(u64, overflow_ts)
__field(u64, hpa)
__field(u64, dpa)
__field(u32, dpa_length)
__array(char, uuid, 16)
__field(u8, source)
__field(u8, flags)
),
TP_fast_assign(
__assign_str(memdev, dev_name(&cxlmd->dev));
__assign_str(host, dev_name(cxlmd->dev.parent));
__entry->serial = cxlmd->cxlds->serial;
__entry->overflow_ts = cxl_poison_overflow(flags, overflow_ts);
__entry->dpa = cxl_poison_record_dpa(record);
__entry->dpa_length = cxl_poison_record_dpa_length(record);
__entry->source = cxl_poison_record_source(record);
__entry->trace_type = trace_type;
__entry->flags = flags;
if (region) {
__assign_str(region, dev_name(&region->dev));
memcpy(__entry->uuid, &region->params.uuid, 16);
__entry->hpa = cxl_trace_hpa(region, cxlmd,
__entry->dpa);
} else {
__assign_str(region, "");
memset(__entry->uuid, 0, 16);
__entry->hpa = ULLONG_MAX;
}
),
TP_printk("memdev=%s host=%s serial=%lld trace_type=%s region=%s " \
"region_uuid=%pU hpa=0x%llx dpa=0x%llx dpa_length=0x%x " \
"source=%s flags=%s overflow_time=%llu",
__get_str(memdev),
__get_str(host),
__entry->serial,
show_poison_trace_type(__entry->trace_type),
__get_str(region),
__entry->uuid,
__entry->hpa,
__entry->dpa,
__entry->dpa_length,
show_poison_source(__entry->source),
show_poison_flags(__entry->flags),
__entry->overflow_ts
)
);
#endif /* _CXL_EVENTS_H */
#define TRACE_INCLUDE_FILE trace

111
drivers/cxl/cxlmem.h
View File

@ -127,7 +127,7 @@ struct cxl_mbox_cmd {
};
/*
* Per CXL 2.0 Section 8.2.8.4.5.1
* Per CXL 3.0 Section 8.2.8.4.5.1
*/
#define CMD_CMD_RC_TABLE \
C(SUCCESS, 0, NULL), \
@ -145,14 +145,22 @@ struct cxl_mbox_cmd {
C(FWROLLBACK, -ENXIO, "rolled back to the previous active FW"), \
C(FWRESET, -ENXIO, "FW failed to activate, needs cold reset"), \
C(HANDLE, -ENXIO, "one or more Event Record Handles were invalid"), \
C(PADDR, -ENXIO, "physical address specified is invalid"), \
C(PADDR, -EFAULT, "physical address specified is invalid"), \
C(POISONLMT, -ENXIO, "poison injection limit has been reached"), \
C(MEDIAFAILURE, -ENXIO, "permanent issue with the media"), \
C(ABORT, -ENXIO, "background cmd was aborted by device"), \
C(SECURITY, -ENXIO, "not valid in the current security state"), \
C(PASSPHRASE, -ENXIO, "phrase doesn't match current set passphrase"), \
C(MBUNSUPPORTED, -ENXIO, "unsupported on the mailbox it was issued on"),\
C(PAYLOADLEN, -ENXIO, "invalid payload length")
C(PAYLOADLEN, -ENXIO, "invalid payload length"), \
C(LOG, -ENXIO, "invalid or unsupported log page"), \
C(INTERRUPTED, -ENXIO, "asynchronous event occured"), \
C(FEATUREVERSION, -ENXIO, "unsupported feature version"), \
C(FEATURESELVALUE, -ENXIO, "unsupported feature selection value"), \
C(FEATURETRANSFERIP, -ENXIO, "feature transfer in progress"), \
C(FEATURETRANSFEROOO, -ENXIO, "feature transfer out of order"), \
C(RESOURCEEXHAUSTED, -ENXIO, "resources are exhausted"), \
C(EXTLIST, -ENXIO, "invalid Extent List"), \
#undef C
#define C(a, b, c) CXL_MBOX_CMD_RC_##a
@ -215,6 +223,37 @@ struct cxl_event_state {
struct mutex log_lock;
};
/* Device enabled poison commands */
enum poison_cmd_enabled_bits {
CXL_POISON_ENABLED_LIST,
CXL_POISON_ENABLED_INJECT,
CXL_POISON_ENABLED_CLEAR,
CXL_POISON_ENABLED_SCAN_CAPS,
CXL_POISON_ENABLED_SCAN_MEDIA,
CXL_POISON_ENABLED_SCAN_RESULTS,
CXL_POISON_ENABLED_MAX
};
/**
* struct cxl_poison_state - Driver poison state info
*
* @max_errors: Maximum media error records held in device cache
* @enabled_cmds: All poison commands enabled in the CEL
* @list_out: The poison list payload returned by device
* @lock: Protect reads of the poison list
*
* Reads of the poison list are synchronized to ensure that a reader
* does not get an incomplete list because their request overlapped
* (was interrupted or preceded by) another read request of the same
* DPA range. CXL Spec 3.0 Section 8.2.9.8.4.1
*/
struct cxl_poison_state {
u32 max_errors;
DECLARE_BITMAP(enabled_cmds, CXL_POISON_ENABLED_MAX);
struct cxl_mbox_poison_out *list_out;
struct mutex lock; /* Protect reads of poison list */
};
/**
* struct cxl_dev_state - The driver device state
*
@ -249,8 +288,8 @@ struct cxl_event_state {
* @component_reg_phys: register base of component registers
* @info: Cached DVSEC information about the device.
* @serial: PCIe Device Serial Number
* @doe_mbs: PCI DOE mailbox array
* @event: event log driver state
* @poison: poison driver state info
* @mbox_send: @dev specific transport for transmitting mailbox commands
*
* See section 8.2.9.5.2 Capacity Configuration and Label Storage for
@ -287,9 +326,8 @@ struct cxl_dev_state {
resource_size_t component_reg_phys;
u64 serial;
struct xarray doe_mbs;
struct cxl_event_state event;
struct cxl_poison_state poison;
int (*mbox_send)(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd);
};
@ -538,6 +576,61 @@ struct cxl_mbox_set_timestamp_in {
} __packed;
/* Get Poison List CXL 3.0 Spec 8.2.9.8.4.1 */
struct cxl_mbox_poison_in {
__le64 offset;
__le64 length;
} __packed;
struct cxl_mbox_poison_out {
u8 flags;
u8 rsvd1;
__le64 overflow_ts;
__le16 count;
u8 rsvd2[20];
struct cxl_poison_record {
__le64 address;
__le32 length;
__le32 rsvd;
} __packed record[];
} __packed;
/*
* Get Poison List address field encodes the starting
* address of poison, and the source of the poison.
*/
#define CXL_POISON_START_MASK GENMASK_ULL(63, 6)
#define CXL_POISON_SOURCE_MASK GENMASK(2, 0)
/* Get Poison List record length is in units of 64 bytes */
#define CXL_POISON_LEN_MULT 64
/* Kernel defined maximum for a list of poison errors */
#define CXL_POISON_LIST_MAX 1024
/* Get Poison List: Payload out flags */
#define CXL_POISON_FLAG_MORE BIT(0)
#define CXL_POISON_FLAG_OVERFLOW BIT(1)
#define CXL_POISON_FLAG_SCANNING BIT(2)
/* Get Poison List: Poison Source */
#define CXL_POISON_SOURCE_UNKNOWN 0
#define CXL_POISON_SOURCE_EXTERNAL 1
#define CXL_POISON_SOURCE_INTERNAL 2
#define CXL_POISON_SOURCE_INJECTED 3
#define CXL_POISON_SOURCE_VENDOR 7
/* Inject & Clear Poison CXL 3.0 Spec 8.2.9.8.4.2/3 */
struct cxl_mbox_inject_poison {
__le64 address;
};
/* Clear Poison CXL 3.0 Spec 8.2.9.8.4.3 */
struct cxl_mbox_clear_poison {
__le64 address;
u8 write_data[CXL_POISON_LEN_MULT];
} __packed;
/**
* struct cxl_mem_command - Driver representation of a memory device command
* @info: Command information as it exists for the UAPI
@ -608,6 +701,12 @@ void set_exclusive_cxl_commands(struct cxl_dev_state *cxlds, unsigned long *cmds
void clear_exclusive_cxl_commands(struct cxl_dev_state *cxlds, unsigned long *cmds);
void cxl_mem_get_event_records(struct cxl_dev_state *cxlds, u32 status);
int cxl_set_timestamp(struct cxl_dev_state *cxlds);
int cxl_poison_state_init(struct cxl_dev_state *cxlds);
int cxl_mem_get_poison(struct cxl_memdev *cxlmd, u64 offset, u64 len,
struct cxl_region *cxlr);
int cxl_trigger_poison_list(struct cxl_memdev *cxlmd);
int cxl_inject_poison(struct cxl_memdev *cxlmd, u64 dpa);
int cxl_clear_poison(struct cxl_memdev *cxlmd, u64 dpa);
#ifdef CONFIG_CXL_SUSPEND
void cxl_mem_active_inc(void);

71
drivers/cxl/mem.c
View File

@ -94,6 +94,26 @@ static int devm_cxl_add_endpoint(struct device *host, struct cxl_memdev *cxlmd,
return 0;
}
static int cxl_debugfs_poison_inject(void *data, u64 dpa)
{
struct cxl_memdev *cxlmd = data;
return cxl_inject_poison(cxlmd, dpa);
}
DEFINE_DEBUGFS_ATTRIBUTE(cxl_poison_inject_fops, NULL,
cxl_debugfs_poison_inject, "%llx\n");
static int cxl_debugfs_poison_clear(void *data, u64 dpa)
{
struct cxl_memdev *cxlmd = data;
return cxl_clear_poison(cxlmd, dpa);
}
DEFINE_DEBUGFS_ATTRIBUTE(cxl_poison_clear_fops, NULL,
cxl_debugfs_poison_clear, "%llx\n");
static int cxl_mem_probe(struct device *dev)
{
struct cxl_memdev *cxlmd = to_cxl_memdev(dev);
@ -117,6 +137,14 @@ static int cxl_mem_probe(struct device *dev)
dentry = cxl_debugfs_create_dir(dev_name(dev));
debugfs_create_devm_seqfile(dev, "dpamem", dentry, cxl_mem_dpa_show);
if (test_bit(CXL_POISON_ENABLED_INJECT, cxlds->poison.enabled_cmds))
debugfs_create_file("inject_poison", 0200, dentry, cxlmd,
&cxl_poison_inject_fops);
if (test_bit(CXL_POISON_ENABLED_CLEAR, cxlds->poison.enabled_cmds))
debugfs_create_file("clear_poison", 0200, dentry, cxlmd,
&cxl_poison_clear_fops);
rc = devm_add_action_or_reset(dev, remove_debugfs, dentry);
if (rc)
return rc;
@ -176,10 +204,53 @@ unlock:
return devm_add_action_or_reset(dev, enable_suspend, NULL);
}
static ssize_t trigger_poison_list_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t len)
{
bool trigger;
int rc;
if (kstrtobool(buf, &trigger) || !trigger)
return -EINVAL;
rc = cxl_trigger_poison_list(to_cxl_memdev(dev));
return rc ? rc : len;
}
static DEVICE_ATTR_WO(trigger_poison_list);
static umode_t cxl_mem_visible(struct kobject *kobj, struct attribute *a, int n)
{
if (a == &dev_attr_trigger_poison_list.attr) {
struct device *dev = kobj_to_dev(kobj);
if (!test_bit(CXL_POISON_ENABLED_LIST,
to_cxl_memdev(dev)->cxlds->poison.enabled_cmds))
return 0;
}
return a->mode;
}
static struct attribute *cxl_mem_attrs[] = {
&dev_attr_trigger_poison_list.attr,
NULL
};
static struct attribute_group cxl_mem_group = {
.attrs = cxl_mem_attrs,
.is_visible = cxl_mem_visible,
};
__ATTRIBUTE_GROUPS(cxl_mem);
static struct cxl_driver cxl_mem_driver = {
.name = "cxl_mem",
.probe = cxl_mem_probe,
.id = CXL_DEVICE_MEMORY_EXPANDER,
.drv = {
.dev_groups = cxl_mem_groups,
},
};
module_cxl_driver(cxl_mem_driver);

53
drivers/cxl/pci.c
View File

@ -8,7 +8,6 @@
#include <linux/mutex.h>
#include <linux/list.h>
#include <linux/pci.h>
#include <linux/pci-doe.h>
#include <linux/aer.h>
#include <linux/io.h>
#include "cxlmem.h"
@ -357,52 +356,6 @@ static int cxl_setup_regs(struct pci_dev *pdev, enum cxl_regloc_type type,
return rc;
}
static void cxl_pci_destroy_doe(void *mbs)
{
xa_destroy(mbs);
}
static void devm_cxl_pci_create_doe(struct cxl_dev_state *cxlds)
{
struct device *dev = cxlds->dev;
struct pci_dev *pdev = to_pci_dev(dev);
u16 off = 0;
xa_init(&cxlds->doe_mbs);
if (devm_add_action(&pdev->dev, cxl_pci_destroy_doe, &cxlds->doe_mbs)) {
dev_err(dev, "Failed to create XArray for DOE's\n");
return;
}
/*
* Mailbox creation is best effort. Higher layers must determine if
* the lack of a mailbox for their protocol is a device failure or not.
*/
pci_doe_for_each_off(pdev, off) {
struct pci_doe_mb *doe_mb;
doe_mb = pcim_doe_create_mb(pdev, off);
if (IS_ERR(doe_mb)) {
dev_err(dev, "Failed to create MB object for MB @ %x\n",
off);
continue;
}
if (!pci_request_config_region_exclusive(pdev, off,
PCI_DOE_CAP_SIZEOF,
dev_name(dev)))
pci_err(pdev, "Failed to exclude DOE registers\n");
if (xa_insert(&cxlds->doe_mbs, off, doe_mb, GFP_KERNEL)) {
dev_err(dev, "xa_insert failed to insert MB @ %x\n",
off);
continue;
}
dev_dbg(dev, "Created DOE mailbox @%x\n", off);
}
}
/*
* Assume that any RCIEP that emits the CXL memory expander class code
* is an RCD
@ -750,8 +703,6 @@ static int cxl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
cxlds->component_reg_phys = map.resource;
devm_cxl_pci_create_doe(cxlds);
rc = cxl_map_component_regs(&pdev->dev, &cxlds->regs.component,
&map, BIT(CXL_CM_CAP_CAP_ID_RAS));
if (rc)
@ -769,6 +720,10 @@ static int cxl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
if (rc)
return rc;
rc = cxl_poison_state_init(cxlds);
if (rc)
return rc;
rc = cxl_dev_state_identify(cxlds);
if (rc)
return rc;

20
drivers/cxl/port.c
View File

@ -66,14 +66,22 @@ static int cxl_switch_port_probe(struct cxl_port *port)
if (rc < 0)
return rc;
if (rc == 1)
return devm_cxl_add_passthrough_decoder(port);
cxlhdm = devm_cxl_setup_hdm(port, NULL);
if (IS_ERR(cxlhdm))
return PTR_ERR(cxlhdm);
if (!IS_ERR(cxlhdm))
return devm_cxl_enumerate_decoders(cxlhdm, NULL);
if (PTR_ERR(cxlhdm) != -ENODEV) {
dev_err(&port->dev, "Failed to map HDM decoder capability\n");
return PTR_ERR(cxlhdm);
}
if (rc == 1) {
dev_dbg(&port->dev, "Fallback to passthrough decoder\n");
return devm_cxl_add_passthrough_decoder(port);
}
dev_err(&port->dev, "HDM decoder capability not found\n");
return -ENXIO;
}
static int cxl_endpoint_port_probe(struct cxl_port *port)

328
drivers/pci/doe.c
View File

@ -20,6 +20,8 @@
#include <linux/pci-doe.h>
#include <linux/workqueue.h>
#include "pci.h"
#define PCI_DOE_PROTOCOL_DISCOVERY 0
/* Timeout of 1 second from 6.30.2 Operation, PCI Spec r6.0 */
@ -37,7 +39,7 @@
*
* This state is used to manage a single DOE mailbox capability. All fields
* should be considered opaque to the consumers and the structure passed into
* the helpers below after being created by devm_pci_doe_create()
* the helpers below after being created by pci_doe_create_mb().
*
* @pdev: PCI device this mailbox belongs to
* @cap_offset: Capability offset
@ -56,6 +58,40 @@ struct pci_doe_mb {
unsigned long flags;
};
struct pci_doe_protocol {
u16 vid;
u8 type;
};
/**
* struct pci_doe_task - represents a single query/response
*
* @prot: DOE Protocol
* @request_pl: The request payload
* @request_pl_sz: Size of the request payload (bytes)
* @response_pl: The response payload
* @response_pl_sz: Size of the response payload (bytes)
* @rv: Return value. Length of received response or error (bytes)
* @complete: Called when task is complete
* @private: Private data for the consumer
* @work: Used internally by the mailbox
* @doe_mb: Used internally by the mailbox
*/
struct pci_doe_task {
struct pci_doe_protocol prot;
const __le32 *request_pl;
size_t request_pl_sz;
__le32 *response_pl;
size_t response_pl_sz;
int rv;
void (*complete)(struct pci_doe_task *task);
void *private;
/* initialized by pci_doe_submit_task() */
struct work_struct work;
struct pci_doe_mb *doe_mb;
};
static int pci_doe_wait(struct pci_doe_mb *doe_mb, unsigned long timeout)
{
if (wait_event_timeout(doe_mb->wq,
@ -110,7 +146,7 @@ static int pci_doe_send_req(struct pci_doe_mb *doe_mb,
{
struct pci_dev *pdev = doe_mb->pdev;
int offset = doe_mb->cap_offset;
size_t length;
size_t length, remainder;
u32 val;
int i;
@ -128,7 +164,7 @@ static int pci_doe_send_req(struct pci_doe_mb *doe_mb,
return -EIO;
/* Length is 2 DW of header + length of payload in DW */
length = 2 + task->request_pl_sz / sizeof(__le32);
length = 2 + DIV_ROUND_UP(task->request_pl_sz, sizeof(__le32));
if (length > PCI_DOE_MAX_LENGTH)
return -EIO;
if (length == PCI_DOE_MAX_LENGTH)
@ -141,10 +177,21 @@ static int pci_doe_send_req(struct pci_doe_mb *doe_mb,
pci_write_config_dword(pdev, offset + PCI_DOE_WRITE,
FIELD_PREP(PCI_DOE_DATA_OBJECT_HEADER_2_LENGTH,
length));
/* Write payload */
for (i = 0; i < task->request_pl_sz / sizeof(__le32); i++)
pci_write_config_dword(pdev, offset + PCI_DOE_WRITE,
le32_to_cpu(task->request_pl[i]));
/* Write last payload dword */
remainder = task->request_pl_sz % sizeof(__le32);
if (remainder) {
val = 0;
memcpy(&val, &task->request_pl[i], remainder);
le32_to_cpus(&val);
pci_write_config_dword(pdev, offset + PCI_DOE_WRITE, val);
}
pci_doe_write_ctrl(doe_mb, PCI_DOE_CTRL_GO);
return 0;
@ -164,11 +211,11 @@ static bool pci_doe_data_obj_ready(struct pci_doe_mb *doe_mb)
static int pci_doe_recv_resp(struct pci_doe_mb *doe_mb, struct pci_doe_task *task)
{
size_t length, payload_length, remainder, received;
struct pci_dev *pdev = doe_mb->pdev;
int offset = doe_mb->cap_offset;
size_t length, payload_length;
int i = 0;
u32 val;
int i;
/* Read the first dword to get the protocol */
pci_read_config_dword(pdev, offset + PCI_DOE_READ, &val);
@ -195,15 +242,38 @@ static int pci_doe_recv_resp(struct pci_doe_mb *doe_mb, struct pci_doe_task *tas
/* First 2 dwords have already been read */
length -= 2;
payload_length = min(length, task->response_pl_sz / sizeof(__le32));
/* Read the rest of the response payload */
for (i = 0; i < payload_length; i++) {
pci_read_config_dword(pdev, offset + PCI_DOE_READ, &val);
received = task->response_pl_sz;
payload_length = DIV_ROUND_UP(task->response_pl_sz, sizeof(__le32));
remainder = task->response_pl_sz % sizeof(__le32);
/* remainder signifies number of data bytes in last payload dword */
if (!remainder)
remainder = sizeof(__le32);
if (length < payload_length) {
received = length * sizeof(__le32);
payload_length = length;
remainder = sizeof(__le32);
}
if (payload_length) {
/* Read all payload dwords except the last */
for (; i < payload_length - 1; i++) {
pci_read_config_dword(pdev, offset + PCI_DOE_READ,
&val);
task->response_pl[i] = cpu_to_le32(val);
pci_write_config_dword(pdev, offset + PCI_DOE_READ, 0);
}
/* Read last payload dword */
pci_read_config_dword(pdev, offset + PCI_DOE_READ, &val);
cpu_to_le32s(&val);
memcpy(&task->response_pl[i], &val, remainder);
/* Prior to the last ack, ensure Data Object Ready */
if (i == (payload_length - 1) && !pci_doe_data_obj_ready(doe_mb))
if (!pci_doe_data_obj_ready(doe_mb))
return -EIO;
pci_write_config_dword(pdev, offset + PCI_DOE_READ, 0);
i++;
}
/* Flush excess length */
@ -217,7 +287,7 @@ static int pci_doe_recv_resp(struct pci_doe_mb *doe_mb, struct pci_doe_task *tas
if (FIELD_GET(PCI_DOE_STATUS_ERROR, val))
return -EIO;
return min(length, task->response_pl_sz / sizeof(__le32)) * sizeof(__le32);
return received;
}
static void signal_task_complete(struct pci_doe_task *task, int rv)
@ -321,26 +391,15 @@ static int pci_doe_discovery(struct pci_doe_mb *doe_mb, u8 *index, u16 *vid,
__le32 request_pl_le = cpu_to_le32(request_pl);
__le32 response_pl_le;
u32 response_pl;
DECLARE_COMPLETION_ONSTACK(c);
struct pci_doe_task task = {
.prot.vid = PCI_VENDOR_ID_PCI_SIG,
.prot.type = PCI_DOE_PROTOCOL_DISCOVERY,
.request_pl = &request_pl_le,
.request_pl_sz = sizeof(request_pl),
.response_pl = &response_pl_le,
.response_pl_sz = sizeof(response_pl),
.complete = pci_doe_task_complete,
.private = &c,
};
int rc;
rc = pci_doe_submit_task(doe_mb, &task);
rc = pci_doe(doe_mb, PCI_VENDOR_ID_PCI_SIG, PCI_DOE_PROTOCOL_DISCOVERY,
&request_pl_le, sizeof(request_pl_le),
&response_pl_le, sizeof(response_pl_le));
if (rc < 0)
return rc;
wait_for_completion(&c);
if (task.rv != sizeof(response_pl))
if (rc != sizeof(response_pl_le))
return -EIO;
response_pl = le32_to_cpu(response_pl_le);
@ -385,37 +444,18 @@ static int pci_doe_cache_protocols(struct pci_doe_mb *doe_mb)
return 0;
}
static void pci_doe_xa_destroy(void *mb)
static void pci_doe_cancel_tasks(struct pci_doe_mb *doe_mb)
{
struct pci_doe_mb *doe_mb = mb;
xa_destroy(&doe_mb->prots);
}
static void pci_doe_destroy_workqueue(void *mb)
{
struct pci_doe_mb *doe_mb = mb;
destroy_workqueue(doe_mb->work_queue);
}
static void pci_doe_flush_mb(void *mb)
{
struct pci_doe_mb *doe_mb = mb;
/* Stop all pending work items from starting */
set_bit(PCI_DOE_FLAG_DEAD, &doe_mb->flags);
/* Cancel an in progress work item, if necessary */
set_bit(PCI_DOE_FLAG_CANCEL, &doe_mb->flags);
wake_up(&doe_mb->wq);
/* Flush all work items */
flush_workqueue(doe_mb->work_queue);
}
/**
* pcim_doe_create_mb() - Create a DOE mailbox object
* pci_doe_create_mb() - Create a DOE mailbox object
*
* @pdev: PCI device to create the DOE mailbox for
* @cap_offset: Offset of the DOE mailbox
@ -426,64 +466,77 @@ static void pci_doe_flush_mb(void *mb)
* RETURNS: created mailbox object on success
* ERR_PTR(-errno) on failure
*/
struct pci_doe_mb *pcim_doe_create_mb(struct pci_dev *pdev, u16 cap_offset)
static struct pci_doe_mb *pci_doe_create_mb(struct pci_dev *pdev,
u16 cap_offset)
{
struct pci_doe_mb *doe_mb;
struct device *dev = &pdev->dev;
int rc;
doe_mb = devm_kzalloc(dev, sizeof(*doe_mb), GFP_KERNEL);
doe_mb = kzalloc(sizeof(*doe_mb), GFP_KERNEL);
if (!doe_mb)
return ERR_PTR(-ENOMEM);
doe_mb->pdev = pdev;
doe_mb->cap_offset = cap_offset;
init_waitqueue_head(&doe_mb->wq);
xa_init(&doe_mb->prots);
rc = devm_add_action(dev, pci_doe_xa_destroy, doe_mb);
if (rc)
return ERR_PTR(rc);
doe_mb->work_queue = alloc_ordered_workqueue("%s %s DOE [%x]", 0,
dev_driver_string(&pdev->dev),
dev_bus_name(&pdev->dev),
pci_name(pdev),
doe_mb->cap_offset);
if (!doe_mb->work_queue) {
pci_err(pdev, "[%x] failed to allocate work queue\n",
doe_mb->cap_offset);
return ERR_PTR(-ENOMEM);
rc = -ENOMEM;
goto err_free;
}
rc = devm_add_action_or_reset(dev, pci_doe_destroy_workqueue, doe_mb);
if (rc)
return ERR_PTR(rc);
/* Reset the mailbox by issuing an abort */
rc = pci_doe_abort(doe_mb);
if (rc) {
pci_err(pdev, "[%x] failed to reset mailbox with abort command : %d\n",
doe_mb->cap_offset, rc);
return ERR_PTR(rc);
goto err_destroy_wq;
}
/*
* The state machine and the mailbox should be in sync now;
* Set up mailbox flush prior to using the mailbox to query protocols.
* Use the mailbox to query protocols.
*/
rc = devm_add_action_or_reset(dev, pci_doe_flush_mb, doe_mb);
if (rc)
return ERR_PTR(rc);
rc = pci_doe_cache_protocols(doe_mb);
if (rc) {
pci_err(pdev, "[%x] failed to cache protocols : %d\n",
doe_mb->cap_offset, rc);
return ERR_PTR(rc);
goto err_cancel;
}
return doe_mb;
err_cancel:
pci_doe_cancel_tasks(doe_mb);
xa_destroy(&doe_mb->prots);
err_destroy_wq:
destroy_workqueue(doe_mb->work_queue);
err_free:
kfree(doe_mb);
return ERR_PTR(rc);
}
/**
* pci_doe_destroy_mb() - Destroy a DOE mailbox object
*
* @doe_mb: DOE mailbox
*
* Destroy all internal data structures created for the DOE mailbox.
*/
static void pci_doe_destroy_mb(struct pci_doe_mb *doe_mb)
{
pci_doe_cancel_tasks(doe_mb);
xa_destroy(&doe_mb->prots);
destroy_workqueue(doe_mb->work_queue);
kfree(doe_mb);
}
EXPORT_SYMBOL_GPL(pcim_doe_create_mb);
/**
* pci_doe_supports_prot() - Return if the DOE instance supports the given
@ -494,7 +547,7 @@ EXPORT_SYMBOL_GPL(pcim_doe_create_mb);
*
* RETURNS: True if the DOE mailbox supports the protocol specified
*/
bool pci_doe_supports_prot(struct pci_doe_mb *doe_mb, u16 vid, u8 type)
static bool pci_doe_supports_prot(struct pci_doe_mb *doe_mb, u16 vid, u8 type)
{
unsigned long index;
void *entry;
@ -509,7 +562,6 @@ bool pci_doe_supports_prot(struct pci_doe_mb *doe_mb, u16 vid, u8 type)
return false;
}
EXPORT_SYMBOL_GPL(pci_doe_supports_prot);
/**
* pci_doe_submit_task() - Submit a task to be processed by the state machine
@ -530,19 +582,12 @@ EXPORT_SYMBOL_GPL(pci_doe_supports_prot);
*
* RETURNS: 0 when task has been successfully queued, -ERRNO on error
*/
int pci_doe_submit_task(struct pci_doe_mb *doe_mb, struct pci_doe_task *task)
static int pci_doe_submit_task(struct pci_doe_mb *doe_mb,
struct pci_doe_task *task)
{
if (!pci_doe_supports_prot(doe_mb, task->prot.vid, task->prot.type))
return -EINVAL;
/*
* DOE requests must be a whole number of DW and the response needs to
* be big enough for at least 1 DW
*/
if (task->request_pl_sz % sizeof(__le32) ||
task->response_pl_sz < sizeof(__le32))
return -EINVAL;
if (test_bit(PCI_DOE_FLAG_DEAD, &doe_mb->flags))
return -EIO;
@ -551,4 +596,129 @@ int pci_doe_submit_task(struct pci_doe_mb *doe_mb, struct pci_doe_task *task)
queue_work(doe_mb->work_queue, &task->work);
return 0;
}
EXPORT_SYMBOL_GPL(pci_doe_submit_task);
/**
* pci_doe() - Perform Data Object Exchange
*
* @doe_mb: DOE Mailbox
* @vendor: Vendor ID
* @type: Data Object Type
* @request: Request payload
* @request_sz: Size of request payload (bytes)
* @response: Response payload
* @response_sz: Size of response payload (bytes)
*
* Submit @request to @doe_mb and store the @response.
* The DOE exchange is performed synchronously and may therefore sleep.
*
* Payloads are treated as opaque byte streams which are transmitted verbatim,
* without byte-swapping. If payloads contain little-endian register values,
* the caller is responsible for conversion with cpu_to_le32() / le32_to_cpu().
*
* For convenience, arbitrary payload sizes are allowed even though PCIe r6.0
* sec 6.30.1 specifies the Data Object Header 2 "Length" in dwords. The last
* (partial) dword is copied with byte granularity and padded with zeroes if
* necessary. Callers are thus relieved of using dword-sized bounce buffers.
*
* RETURNS: Length of received response or negative errno.
* Received data in excess of @response_sz is discarded.
* The length may be smaller than @response_sz and the caller
* is responsible for checking that.
*/
int pci_doe(struct pci_doe_mb *doe_mb, u16 vendor, u8 type,
const void *request, size_t request_sz,
void *response, size_t response_sz)
{
DECLARE_COMPLETION_ONSTACK(c);
struct pci_doe_task task = {
.prot.vid = vendor,
.prot.type = type,
.request_pl = request,
.request_pl_sz = request_sz,
.response_pl = response,
.response_pl_sz = response_sz,
.complete = pci_doe_task_complete,
.private = &c,
};
int rc;
rc = pci_doe_submit_task(doe_mb, &task);
if (rc)
return rc;
wait_for_completion(&c);
return task.rv;
}
EXPORT_SYMBOL_GPL(pci_doe);
/**
* pci_find_doe_mailbox() - Find Data Object Exchange mailbox
*
* @pdev: PCI device
* @vendor: Vendor ID
* @type: Data Object Type
*
* Find first DOE mailbox of a PCI device which supports the given protocol.
*
* RETURNS: Pointer to the DOE mailbox or NULL if none was found.
*/
struct pci_doe_mb *pci_find_doe_mailbox(struct pci_dev *pdev, u16 vendor,
u8 type)
{
struct pci_doe_mb *doe_mb;
unsigned long index;
xa_for_each(&pdev->doe_mbs, index, doe_mb)
if (pci_doe_supports_prot(doe_mb, vendor, type))
return doe_mb;
return NULL;
}
EXPORT_SYMBOL_GPL(pci_find_doe_mailbox);
void pci_doe_init(struct pci_dev *pdev)
{
struct pci_doe_mb *doe_mb;
u16 offset = 0;
int rc;
xa_init(&pdev->doe_mbs);
while ((offset = pci_find_next_ext_capability(pdev, offset,
PCI_EXT_CAP_ID_DOE))) {
doe_mb = pci_doe_create_mb(pdev, offset);
if (IS_ERR(doe_mb)) {
pci_err(pdev, "[%x] failed to create mailbox: %ld\n",
offset, PTR_ERR(doe_mb));
continue;
}
rc = xa_insert(&pdev->doe_mbs, offset, doe_mb, GFP_KERNEL);
if (rc) {
pci_err(pdev, "[%x] failed to insert mailbox: %d\n",
offset, rc);
pci_doe_destroy_mb(doe_mb);
}
}
}
void pci_doe_destroy(struct pci_dev *pdev)
{
struct pci_doe_mb *doe_mb;
unsigned long index;
xa_for_each(&pdev->doe_mbs, index, doe_mb)
pci_doe_destroy_mb(doe_mb);
xa_destroy(&pdev->doe_mbs);
}
void pci_doe_disconnected(struct pci_dev *pdev)
{
struct pci_doe_mb *doe_mb;
unsigned long index;
xa_for_each(&pdev->doe_mbs, index, doe_mb)
pci_doe_cancel_tasks(doe_mb);
}

11
drivers/pci/pci.h
View File

@ -311,6 +311,16 @@ struct pci_sriov {
bool drivers_autoprobe; /* Auto probing of VFs by driver */
};
#ifdef CONFIG_PCI_DOE
void pci_doe_init(struct pci_dev *pdev);
void pci_doe_destroy(struct pci_dev *pdev);
void pci_doe_disconnected(struct pci_dev *pdev);
#else
static inline void pci_doe_init(struct pci_dev *pdev) { }
static inline void pci_doe_destroy(struct pci_dev *pdev) { }
static inline void pci_doe_disconnected(struct pci_dev *pdev) { }
#endif
/**
* pci_dev_set_io_state - Set the new error state if possible.
*
@ -347,6 +357,7 @@ static inline bool pci_dev_set_io_state(struct pci_dev *dev,
static inline int pci_dev_set_disconnected(struct pci_dev *dev, void *unused)
{
pci_dev_set_io_state(dev, pci_channel_io_perm_failure);
pci_doe_disconnected(dev);
return 0;
}

1
drivers/pci/probe.c
View File

@ -2479,6 +2479,7 @@ static void pci_init_capabilities(struct pci_dev *dev)
pci_aer_init(dev); /* Advanced Error Reporting */
pci_dpc_init(dev); /* Downstream Port Containment */
pci_rcec_init(dev); /* Root Complex Event Collector */
pci_doe_init(dev); /* Data Object Exchange */
pcie_report_downtraining(dev);
pci_init_reset_methods(dev);

1
drivers/pci/remove.c
View File

@ -38,6 +38,7 @@ static void pci_destroy_dev(struct pci_dev *dev)
list_del(&dev->bus_list);
up_write(&pci_bus_sem);
pci_doe_destroy(dev);
pcie_aspm_exit_link_state(dev);
pci_bridge_d3_update(dev);
pci_free_resources(dev);

66
include/linux/pci-doe.h
View File

@ -13,69 +13,13 @@
#ifndef LINUX_PCI_DOE_H
#define LINUX_PCI_DOE_H
struct pci_doe_protocol {
u16 vid;
u8 type;
};
struct pci_doe_mb;
/**
* struct pci_doe_task - represents a single query/response
*
* @prot: DOE Protocol
* @request_pl: The request payload
* @request_pl_sz: Size of the request payload (bytes)
* @response_pl: The response payload
* @response_pl_sz: Size of the response payload (bytes)
* @rv: Return value. Length of received response or error (bytes)
* @complete: Called when task is complete
* @private: Private data for the consumer
* @work: Used internally by the mailbox
* @doe_mb: Used internally by the mailbox
*
* Payloads are treated as opaque byte streams which are transmitted verbatim,
* without byte-swapping. If payloads contain little-endian register values,
* the caller is responsible for conversion with cpu_to_le32() / le32_to_cpu().
*
* The payload sizes and rv are specified in bytes with the following
* restrictions concerning the protocol.
*
* 1) The request_pl_sz must be a multiple of double words (4 bytes)
* 2) The response_pl_sz must be >= a single double word (4 bytes)
* 3) rv is returned as bytes but it will be a multiple of double words
*
* NOTE there is no need for the caller to initialize work or doe_mb.
*/
struct pci_doe_task {
struct pci_doe_protocol prot;
__le32 *request_pl;
size_t request_pl_sz;
__le32 *response_pl;
size_t response_pl_sz;
int rv;
void (*complete)(struct pci_doe_task *task);
void *private;
struct pci_doe_mb *pci_find_doe_mailbox(struct pci_dev *pdev, u16 vendor,
u8 type);
/* No need for the user to initialize these fields */
struct work_struct work;
struct pci_doe_mb *doe_mb;
};
/**
* pci_doe_for_each_off - Iterate each DOE capability
* @pdev: struct pci_dev to iterate
* @off: u16 of config space offset of each mailbox capability found
*/
#define pci_doe_for_each_off(pdev, off) \
for (off = pci_find_next_ext_capability(pdev, off, \
PCI_EXT_CAP_ID_DOE); \
off > 0; \
off = pci_find_next_ext_capability(pdev, off, \
PCI_EXT_CAP_ID_DOE))
struct pci_doe_mb *pcim_doe_create_mb(struct pci_dev *pdev, u16 cap_offset);
bool pci_doe_supports_prot(struct pci_doe_mb *doe_mb, u16 vid, u8 type);
int pci_doe_submit_task(struct pci_doe_mb *doe_mb, struct pci_doe_task *task);
int pci_doe(struct pci_doe_mb *doe_mb, u16 vendor, u8 type,
const void *request, size_t request_sz,
void *response, size_t response_sz);
#endif

3
include/linux/pci.h
View File

@ -511,6 +511,9 @@ struct pci_dev {
#endif
#ifdef CONFIG_PCI_P2PDMA
struct pci_p2pdma __rcu *p2pdma;
#endif
#ifdef CONFIG_PCI_DOE
struct xarray doe_mbs; /* Data Object Exchange mailboxes */
#endif
u16 acs_cap; /* ACS Capability offset */
phys_addr_t rom; /* Physical address if not from BAR */

35
include/uapi/linux/cxl_mem.h
View File

@ -40,19 +40,22 @@
___C(SET_ALERT_CONFIG, "Set Alert Configuration"), \
___C(GET_SHUTDOWN_STATE, "Get Shutdown State"), \
___C(SET_SHUTDOWN_STATE, "Set Shutdown State"), \
___C(GET_POISON, "Get Poison List"), \
___C(INJECT_POISON, "Inject Poison"), \
___C(CLEAR_POISON, "Clear Poison"), \
___DEPRECATED(GET_POISON, "Get Poison List"), \
___DEPRECATED(INJECT_POISON, "Inject Poison"), \
___DEPRECATED(CLEAR_POISON, "Clear Poison"), \
___C(GET_SCAN_MEDIA_CAPS, "Get Scan Media Capabilities"), \
___C(SCAN_MEDIA, "Scan Media"), \
___C(GET_SCAN_MEDIA, "Get Scan Media Results"), \
___DEPRECATED(SCAN_MEDIA, "Scan Media"), \
___DEPRECATED(GET_SCAN_MEDIA, "Get Scan Media Results"), \
___C(MAX, "invalid / last command")
#define ___C(a, b) CXL_MEM_COMMAND_ID_##a
#define ___DEPRECATED(a, b) CXL_MEM_DEPRECATED_ID_##a
enum { CXL_CMDS };
#undef ___C
#undef ___DEPRECATED
#define ___C(a, b) { b }
#define ___DEPRECATED(a, b) { "Deprecated " b }
static const struct {
const char *name;
} cxl_command_names[] __attribute__((__unused__)) = { CXL_CMDS };
@ -68,6 +71,28 @@ static const struct {
*/
#undef ___C
#undef ___DEPRECATED
#define ___C(a, b) (0)
#define ___DEPRECATED(a, b) (1)
static const __u8 cxl_deprecated_commands[]
__attribute__((__unused__)) = { CXL_CMDS };
/*
* Here's how this actually breaks out:
* cxl_deprecated_commands[] = {
* [CXL_MEM_COMMAND_ID_INVALID] = 0,
* [CXL_MEM_COMMAND_ID_IDENTIFY] = 0,
* ...
* [CXL_MEM_DEPRECATED_ID_GET_POISON] = 1,
* [CXL_MEM_DEPRECATED_ID_INJECT_POISON] = 1,
* [CXL_MEM_DEPRECATED_ID_CLEAR_POISON] = 1,
* ...
* };
*/
#undef ___C
#undef ___DEPRECATED
/**
* struct cxl_command_info - Command information returned from a query.

1
tools/testing/cxl/config_check.c
View File

@ -13,4 +13,5 @@ void check(void)
BUILD_BUG_ON(!IS_MODULE(CONFIG_CXL_PMEM));
BUILD_BUG_ON(!IS_ENABLED(CONFIG_CXL_REGION_INVALIDATION_TEST));
BUILD_BUG_ON(!IS_ENABLED(CONFIG_NVDIMM_SECURITY_TEST));
BUILD_BUG_ON(!IS_ENABLED(CONFIG_DEBUG_FS));
}

247
tools/testing/cxl/test/mem.c
View File

@ -7,6 +7,7 @@
#include <linux/delay.h>
#include <linux/sizes.h>
#include <linux/bits.h>
#include <asm/unaligned.h>
#include <cxlmem.h>
#include "trace.h"
@ -15,6 +16,11 @@
#define DEV_SIZE SZ_2G
#define EFFECT(x) (1U << x)
#define MOCK_INJECT_DEV_MAX 8
#define MOCK_INJECT_TEST_MAX 128
static unsigned int poison_inject_dev_max = MOCK_INJECT_DEV_MAX;
static struct cxl_cel_entry mock_cel[] = {
{
.opcode = cpu_to_le16(CXL_MBOX_OP_GET_SUPPORTED_LOGS),
@ -40,6 +46,18 @@ static struct cxl_cel_entry mock_cel[] = {
.opcode = cpu_to_le16(CXL_MBOX_OP_GET_HEALTH_INFO),
.effect = cpu_to_le16(0),
},
{
.opcode = cpu_to_le16(CXL_MBOX_OP_GET_POISON),
.effect = cpu_to_le16(0),
},
{
.opcode = cpu_to_le16(CXL_MBOX_OP_INJECT_POISON),
.effect = cpu_to_le16(0),
},
{
.opcode = cpu_to_le16(CXL_MBOX_OP_CLEAR_POISON),
.effect = cpu_to_le16(0),
},
};
/* See CXL 2.0 Table 181 Get Health Info Output Payload */
@ -98,6 +116,7 @@ struct cxl_mockmem_data {
int master_limit;
struct mock_event_store mes;
u8 event_buf[SZ_4K];
u64 timestamp;
};
static struct mock_event_log *event_find_log(struct device *dev, int log_type)
@ -361,6 +380,22 @@ struct cxl_event_mem_module mem_module = {
}
};
static int mock_set_timestamp(struct cxl_dev_state *cxlds,
struct cxl_mbox_cmd *cmd)
{
struct cxl_mockmem_data *mdata = dev_get_drvdata(cxlds->dev);
struct cxl_mbox_set_timestamp_in *ts = cmd->payload_in;
if (cmd->size_in != sizeof(*ts))
return -EINVAL;
if (cmd->size_out != 0)
return -EINVAL;
mdata->timestamp = le64_to_cpu(ts->timestamp);
return 0;
}
static void cxl_mock_add_event_logs(struct mock_event_store *mes)
{
put_unaligned_le16(CXL_GMER_VALID_CHANNEL | CXL_GMER_VALID_RANK,
@ -469,8 +504,11 @@ static int mock_id(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd)
cpu_to_le64(SZ_256M / CXL_CAPACITY_MULTIPLIER),
.total_capacity =
cpu_to_le64(DEV_SIZE / CXL_CAPACITY_MULTIPLIER),
.inject_poison_limit = cpu_to_le16(MOCK_INJECT_TEST_MAX),
};
put_unaligned_le24(CXL_POISON_LIST_MAX, id.poison_list_max_mer);
if (cmd->size_out < sizeof(id))
return -EINVAL;
@ -888,12 +926,203 @@ static int mock_health_info(struct cxl_dev_state *cxlds,
return 0;
}
static struct mock_poison {
struct cxl_dev_state *cxlds;
u64 dpa;
} mock_poison_list[MOCK_INJECT_TEST_MAX];
static struct cxl_mbox_poison_out *
cxl_get_injected_po(struct cxl_dev_state *cxlds, u64 offset, u64 length)
{
struct cxl_mbox_poison_out *po;
int nr_records = 0;
u64 dpa;
po = kzalloc(struct_size(po, record, poison_inject_dev_max), GFP_KERNEL);
if (!po)
return NULL;
for (int i = 0; i < MOCK_INJECT_TEST_MAX; i++) {
if (mock_poison_list[i].cxlds != cxlds)
continue;
if (mock_poison_list[i].dpa < offset ||
mock_poison_list[i].dpa > offset + length - 1)
continue;
dpa = mock_poison_list[i].dpa + CXL_POISON_SOURCE_INJECTED;
po->record[nr_records].address = cpu_to_le64(dpa);
po->record[nr_records].length = cpu_to_le32(1);
nr_records++;
if (nr_records == poison_inject_dev_max)
break;
}
/* Always return count, even when zero */
po->count = cpu_to_le16(nr_records);
return po;
}
static int mock_get_poison(struct cxl_dev_state *cxlds,
struct cxl_mbox_cmd *cmd)
{
struct cxl_mbox_poison_in *pi = cmd->payload_in;
struct cxl_mbox_poison_out *po;
u64 offset = le64_to_cpu(pi->offset);
u64 length = le64_to_cpu(pi->length);
int nr_records;
po = cxl_get_injected_po(cxlds, offset, length);
if (!po)
return -ENOMEM;
nr_records = le16_to_cpu(po->count);
memcpy(cmd->payload_out, po, struct_size(po, record, nr_records));
cmd->size_out = struct_size(po, record, nr_records);
kfree(po);
return 0;
}
static bool mock_poison_dev_max_injected(struct cxl_dev_state *cxlds)
{
int count = 0;
for (int i = 0; i < MOCK_INJECT_TEST_MAX; i++) {
if (mock_poison_list[i].cxlds == cxlds)
count++;
}
return (count >= poison_inject_dev_max);
}
static bool mock_poison_add(struct cxl_dev_state *cxlds, u64 dpa)
{
if (mock_poison_dev_max_injected(cxlds)) {
dev_dbg(cxlds->dev,
"Device poison injection limit has been reached: %d\n",
MOCK_INJECT_DEV_MAX);
return false;
}
for (int i = 0; i < MOCK_INJECT_TEST_MAX; i++) {
if (!mock_poison_list[i].cxlds) {
mock_poison_list[i].cxlds = cxlds;
mock_poison_list[i].dpa = dpa;
return true;
}
}
dev_dbg(cxlds->dev,
"Mock test poison injection limit has been reached: %d\n",
MOCK_INJECT_TEST_MAX);
return false;
}
static bool mock_poison_found(struct cxl_dev_state *cxlds, u64 dpa)
{
for (int i = 0; i < MOCK_INJECT_TEST_MAX; i++) {
if (mock_poison_list[i].cxlds == cxlds &&
mock_poison_list[i].dpa == dpa)
return true;
}
return false;
}
static int mock_inject_poison(struct cxl_dev_state *cxlds,
struct cxl_mbox_cmd *cmd)
{
struct cxl_mbox_inject_poison *pi = cmd->payload_in;
u64 dpa = le64_to_cpu(pi->address);
if (mock_poison_found(cxlds, dpa)) {
/* Not an error to inject poison if already poisoned */
dev_dbg(cxlds->dev, "DPA: 0x%llx already poisoned\n", dpa);
return 0;
}
if (!mock_poison_add(cxlds, dpa))
return -ENXIO;
return 0;
}
static bool mock_poison_del(struct cxl_dev_state *cxlds, u64 dpa)
{
for (int i = 0; i < MOCK_INJECT_TEST_MAX; i++) {
if (mock_poison_list[i].cxlds == cxlds &&
mock_poison_list[i].dpa == dpa) {
mock_poison_list[i].cxlds = NULL;
return true;
}
}
return false;
}
static int mock_clear_poison(struct cxl_dev_state *cxlds,
struct cxl_mbox_cmd *cmd)
{
struct cxl_mbox_clear_poison *pi = cmd->payload_in;
u64 dpa = le64_to_cpu(pi->address);
/*
* A real CXL device will write pi->write_data to the address
* being cleared. In this mock, just delete this address from
* the mock poison list.
*/
if (!mock_poison_del(cxlds, dpa))
dev_dbg(cxlds->dev, "DPA: 0x%llx not in poison list\n", dpa);
return 0;
}
static bool mock_poison_list_empty(void)
{
for (int i = 0; i < MOCK_INJECT_TEST_MAX; i++) {
if (mock_poison_list[i].cxlds)
return false;
}
return true;
}
static ssize_t poison_inject_max_show(struct device_driver *drv, char *buf)
{
return sysfs_emit(buf, "%u\n", poison_inject_dev_max);
}
static ssize_t poison_inject_max_store(struct device_driver *drv,
const char *buf, size_t len)
{
int val;
if (kstrtoint(buf, 0, &val) < 0)
return -EINVAL;
if (!mock_poison_list_empty())
return -EBUSY;
if (val <= MOCK_INJECT_TEST_MAX)
poison_inject_dev_max = val;
else
return -EINVAL;
return len;
}
static DRIVER_ATTR_RW(poison_inject_max);
static struct attribute *cxl_mock_mem_core_attrs[] = {
&driver_attr_poison_inject_max.attr,
NULL
};
ATTRIBUTE_GROUPS(cxl_mock_mem_core);
static int cxl_mock_mbox_send(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd)
{
struct device *dev = cxlds->dev;
int rc = -EIO;
switch (cmd->opcode) {
case CXL_MBOX_OP_SET_TIMESTAMP:
rc = mock_set_timestamp(cxlds, cmd);
break;
case CXL_MBOX_OP_GET_SUPPORTED_LOGS:
rc = mock_gsl(cmd);
break;
@ -942,6 +1171,15 @@ static int cxl_mock_mbox_send(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *
case CXL_MBOX_OP_PASSPHRASE_SECURE_ERASE:
rc = mock_passphrase_secure_erase(cxlds, cmd);
break;
case CXL_MBOX_OP_GET_POISON:
rc = mock_get_poison(cxlds, cmd);
break;
case CXL_MBOX_OP_INJECT_POISON:
rc = mock_inject_poison(cxlds, cmd);
break;
case CXL_MBOX_OP_CLEAR_POISON:
rc = mock_clear_poison(cxlds, cmd);
break;
default:
break;
}
@ -1010,6 +1248,14 @@ static int cxl_mock_mem_probe(struct platform_device *pdev)
if (rc)
return rc;
rc = cxl_poison_state_init(cxlds);
if (rc)
return rc;
rc = cxl_set_timestamp(cxlds);
if (rc)
return rc;
rc = cxl_dev_state_identify(cxlds);
if (rc)
return rc;
@ -1083,6 +1329,7 @@ static struct platform_driver cxl_mock_mem_driver = {
.driver = {
.name = KBUILD_MODNAME,
.dev_groups = cxl_mock_mem_groups,
.groups = cxl_mock_mem_core_groups,
},
};