[RFC,V2,08/11] cxl/test: Add generic mock events

Message ID	20221010224131.1866246-9-ira.weiny@intel.com
State	Superseded
Headers	show Return-Path: <linux-cxl-owner@kernel.org> From: ira.weiny@intel.com To: Dan Williams <dan.j.williams@intel.com> Cc: Ira Weiny <ira.weiny@intel.com>, Alison Schofield <alison.schofield@intel.com>, Vishal Verma <vishal.l.verma@intel.com>, Ben Widawsky <bwidawsk@kernel.org>, Steven Rostedt <rostedt@goodmis.org>, Jonathan Cameron <Jonathan.Cameron@huawei.com>, Davidlohr Bueso <dave@stgolabs.net>, linux-kernel@vger.kernel.org, linux-cxl@vger.kernel.org Subject: [RFC V2 PATCH 08/11] cxl/test: Add generic mock events Date: Mon, 10 Oct 2022 15:41:28 -0700 Message-Id: <20221010224131.1866246-9-ira.weiny@intel.com> In-Reply-To: <20221010224131.1866246-1-ira.weiny@intel.com> References: <20221010224131.1866246-1-ira.weiny@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk
Series	CXL: Process event logs \| expand [RFC,V2,00/11] CXL: Process event logs [RFC,V2,01/11] cxl/mbox: Add debug of hardware error code [RFC,V2,02/11] cxl/mem: Implement Get Event Records command [RFC,V2,03/11] cxl/mem: Implement Clear Event Records command [RFC,V2,04/11] cxl/mem: Clear events on driver load [RFC,V2,05/11] cxl/mem: Trace General Media Event Record [RFC,V2,06/11] cxl/mem: Trace DRAM Event Record [RFC,V2,07/11] cxl/mem: Trace Memory Module Event Record [RFC,V2,08/11] cxl/test: Add generic mock events [RFC,V2,09/11] cxl/test: Add specific events [RFC,V2,10/11] cxl/test: Simulate event log overflow [RFC,V2,11/11] cxl/mem: Wire up event interrupts

diff --git a/tools/testing/cxl/test/Kbuild b/tools/testing/cxl/test/Kbuild index 4e59e2c911f6..64b14b83d8d9 100644 --- a/tools/testing/cxl/test/Kbuild +++ b/tools/testing/cxl/test/Kbuild @@ -7,4 +7,4 @@ obj-m += cxl_mock_mem.o cxl_test-y := cxl.o cxl_mock-y := mock.o -cxl_mock_mem-y := mem.o +cxl_mock_mem-y := mem.o events.o diff --git a/tools/testing/cxl/test/events.c b/tools/testing/cxl/test/events.c new file mode 100644 index 000000000000..1913c321d16c --- /dev/null +++ b/tools/testing/cxl/test/events.c @@ -0,0 +1,223 @@ +// SPDX-License-Identifier: GPL-2.0-only +// Copyright(c) 2022 Intel Corporation. All rights reserved. + +#include <cxlmem.h> +#include <trace/events/cxl.h> + +#include "events.h" + +#define CXL_TEST_EVENT_CNT_MAX 15 + +struct mock_event_log { + int cur_event; + int nr_events; + struct cxl_event_record_raw *events[CXL_TEST_EVENT_CNT_MAX]; +}; + +struct mock_event_store { + struct cxl_dev_state *cxlds; + struct mock_event_log mock_logs[CXL_EVENT_TYPE_MAX]; +}; + +DEFINE_XARRAY(mock_dev_event_store); + +struct mock_event_log *find_event_log(struct device *dev, int log_type) +{ + struct mock_event_store *mes = xa_load(&mock_dev_event_store, + (unsigned long)dev); + + if (!mes || log_type >= CXL_EVENT_TYPE_MAX) + return NULL; + return &mes->mock_logs[log_type]; +} + +struct cxl_event_record_raw *get_cur_event(struct mock_event_log *log) +{ + return log->events[log->cur_event]; +} + +__le16 get_cur_event_handle(struct mock_event_log *log) +{ + return cpu_to_le16(log->cur_event); +} + +static bool log_empty(struct mock_event_log *log) +{ + return log->cur_event == log->nr_events; +} + +static int log_rec_left(struct mock_event_log *log) +{ + return log->nr_events - log->cur_event; +} + +static void event_store_add_event(struct mock_event_store *mes, + enum cxl_event_log_type log_type, + struct cxl_event_record_raw *event) +{ + struct mock_event_log *log; + + if (WARN_ON(log_type >= CXL_EVENT_TYPE_MAX)) + return; + + log = &mes->mock_logs[log_type]; + if (WARN_ON(log->nr_events >= CXL_TEST_EVENT_CNT_MAX)) + return; + + log->events[log->nr_events] = event; + log->nr_events++; +} + +int mock_get_event(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd) +{ + struct cxl_get_event_payload *pl; + struct mock_event_log *log; + u8 log_type; + + /* Valid request? */ + if (cmd->size_in != sizeof(log_type)) + return -EINVAL; + + log_type = *((u8 *)cmd->payload_in); + if (log_type >= CXL_EVENT_TYPE_MAX) + return -EINVAL; + + log = find_event_log(cxlds->dev, log_type); + if (!log || log_empty(log)) + goto no_data; + + /* Don't handle more than 1 record at a time */ + if (cmd->size_out < sizeof(*pl)) + return -EINVAL; + + pl = cmd->payload_out; + memset(pl, 0, sizeof(*pl)); + + pl->record_count = cpu_to_le16(1); + + if (log_rec_left(log) > 1) + pl->flags |= CXL_GET_EVENT_FLAG_MORE_RECORDS; + + memcpy(&pl->record, get_cur_event(log), sizeof(pl->record)); + pl->record.hdr.handle = get_cur_event_handle(log); + return 0; + +no_data: + /* Room for header? */ + if (cmd->size_out < (sizeof(*pl) - sizeof(pl->record))) + return -EINVAL; + + memset(cmd->payload_out, 0, cmd->size_out); + return 0; +} +EXPORT_SYMBOL_GPL(mock_get_event); + +/* + * Get and clear event only handle 1 record at a time as this is what is + * currently implemented in the main code. + */ +int mock_clear_event(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd) +{ + struct cxl_mbox_clear_event_payload *pl = cmd->payload_in; + struct mock_event_log *log; + u8 log_type = pl->event_log; + + /* Don't handle more than 1 record at a time */ + if (pl->nr_recs != 1) + return -EINVAL; + + if (log_type >= CXL_EVENT_TYPE_MAX) + return -EINVAL; + + log = find_event_log(cxlds->dev, log_type); + if (!log) + return 0; /* No mock data in this log */ + + /* + * The current code clears events as they are read. Test that behavior + * only; don't support clearning from the middle of the log + */ + if (log->cur_event != le16_to_cpu(pl->handle)) { + dev_err(cxlds->dev, "Clearing events out of order\n"); + return -EINVAL; + } + + log->cur_event++; + return 0; +} +EXPORT_SYMBOL_GPL(mock_clear_event); + +void cxl_mock_event_trigger(struct device *dev) +{ + struct mock_event_store *mes = xa_load(&mock_dev_event_store, + (unsigned long)dev); + int i; + + for (i = CXL_EVENT_TYPE_INFO; i < CXL_EVENT_TYPE_MAX; i++) { + struct mock_event_log *log; + + log = find_event_log(dev, i); + if (log) + log->cur_event = 0; + } + + cxl_mem_get_event_records(mes->cxlds); +} +EXPORT_SYMBOL_GPL(cxl_mock_event_trigger); + +struct cxl_event_record_raw maint_needed = { + .hdr = { + .id = UUID_INIT(0xDEADBEEF, 0xCAFE, 0xBABE, + 0xa5, 0x5a, 0xa5, 0x5a, 0xa5, 0xa5, 0x5a, 0xa5), + .length = sizeof(struct cxl_event_record_raw), + .flags[0] = CXL_EVENT_RECORD_FLAG_MAINT_NEEDED, + /* .handle = Set dynamically */ + .related_handle = cpu_to_le16(0xa5b6), + }, + .data = { 0xDE, 0xAD, 0xBE, 0xEF }, +}; + +struct cxl_event_record_raw hardware_replace = { + .hdr = { + .id = UUID_INIT(0xBABECAFE, 0xBEEF, 0xDEAD, + 0xa5, 0x5a, 0xa5, 0x5a, 0xa5, 0xa5, 0x5a, 0xa5), + .length = sizeof(struct cxl_event_record_raw), + .flags[0] = CXL_EVENT_RECORD_FLAG_HW_REPLACE, + /* .handle = Set dynamically */ + .related_handle = cpu_to_le16(0xb6a5), + }, + .data = { 0xDE, 0xAD, 0xBE, 0xEF }, +}; + +void cxl_mock_add_event_logs(struct cxl_dev_state *cxlds) +{ + struct device *dev = cxlds->dev; + struct mock_event_store *mes; + + mes = kzalloc(sizeof(*mes), GFP_KERNEL); + if (WARN_ON(!mes)) + return; + mes->cxlds = cxlds; + + if (xa_insert(&mock_dev_event_store, (unsigned long)dev, mes, + GFP_KERNEL)) { + dev_err(dev, "Event store not available for %s\n", + dev_name(dev)); + return; + } + + event_store_add_event(mes, CXL_EVENT_TYPE_INFO, &maint_needed); + + event_store_add_event(mes, CXL_EVENT_TYPE_FATAL, &hardware_replace); + +} +EXPORT_SYMBOL_GPL(cxl_mock_add_event_logs); + +void cxl_mock_remove_event_logs(struct device *dev) +{ + struct mock_event_store *mes; + + mes = xa_erase(&mock_dev_event_store, (unsigned long)dev); + kfree(mes); +} +EXPORT_SYMBOL_GPL(cxl_mock_remove_event_logs); diff --git a/tools/testing/cxl/test/events.h b/tools/testing/cxl/test/events.h new file mode 100644 index 000000000000..b3149b38d6df --- /dev/null +++ b/tools/testing/cxl/test/events.h @@ -0,0 +1,9 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#include <cxlmem.h> + +int mock_get_event(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd); +int mock_clear_event(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd); +void cxl_mock_add_event_logs(struct cxl_dev_state *cxlds); +void cxl_mock_remove_event_logs(struct device *dev); +void cxl_mock_event_trigger(struct device *dev); diff --git a/tools/testing/cxl/test/mem.c b/tools/testing/cxl/test/mem.c index e2f5445d24ff..9768f5132a5c 100644 --- a/tools/testing/cxl/test/mem.c +++ b/tools/testing/cxl/test/mem.c @@ -8,6 +8,7 @@ #include <linux/sizes.h> #include <linux/bits.h> #include <cxlmem.h> +#include "events.h" #define LSA_SIZE SZ_128K #define DEV_SIZE SZ_2G @@ -224,6 +225,12 @@ static int cxl_mock_mbox_send(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd * case CXL_MBOX_OP_GET_PARTITION_INFO: rc = mock_partition_info(cxlds, cmd); break; + case CXL_MBOX_OP_GET_EVENT_RECORD: + rc = mock_get_event(cxlds, cmd); + break; + case CXL_MBOX_OP_CLEAR_EVENT_RECORD: + rc = mock_clear_event(cxlds, cmd); + break; case CXL_MBOX_OP_SET_LSA: rc = mock_set_lsa(cxlds, cmd); break; @@ -245,6 +252,21 @@ static void label_area_release(void *lsa) vfree(lsa); } +static ssize_t event_trigger_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + cxl_mock_event_trigger(dev); + return count; +} +static DEVICE_ATTR_WO(event_trigger); + +static struct attribute *cxl_mock_event_attrs[] = { + &dev_attr_event_trigger.attr, + NULL +}; +ATTRIBUTE_GROUPS(cxl_mock_event); + static int cxl_mock_mem_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -281,6 +303,8 @@ static int cxl_mock_mem_probe(struct platform_device *pdev) if (rc) return rc; + cxl_mock_add_event_logs(cxlds); + cxlmd = devm_cxl_add_memdev(cxlds); if (IS_ERR(cxlmd)) return PTR_ERR(cxlmd); @@ -293,6 +317,12 @@ static int cxl_mock_mem_probe(struct platform_device *pdev) return 0; } +static int cxl_mock_mem_remove(struct platform_device *pdev) +{ + cxl_mock_remove_event_logs(&pdev->dev); + return 0; +} + static const struct platform_device_id cxl_mock_mem_ids[] = { { .name = "cxl_mem", }, { }, @@ -301,9 +331,11 @@ MODULE_DEVICE_TABLE(platform, cxl_mock_mem_ids); static struct platform_driver cxl_mock_mem_driver = { .probe = cxl_mock_mem_probe, + .remove = cxl_mock_mem_remove, .id_table = cxl_mock_mem_ids, .driver = { .name = KBUILD_MODNAME, + .dev_groups = cxl_mock_event_groups, }, };

[RFC,V2,08/11] cxl/test: Add generic mock events

Commit Message

Patch