From: Vishal Verma <vishal.l.verma@intel.com>
To: <linux-cxl@vger.kernel.org>
Cc: linux-nvdimm@lists.01.org, Ben Widawsky <ben.widawsky@intel.com>
Subject: [ndctl PATCH v2 04/13] libcxl: add support for the 'Identify Device' command
Date: Thu, 18 Feb 2021 19:03:22 -0700 [thread overview]
Message-ID: <20210219020331.725687-5-vishal.l.verma@intel.com> (raw)
In-Reply-To: <20210219020331.725687-1-vishal.l.verma@intel.com>
Add APIs to allocate and send an 'Identify Device' command, and
accessors to retrieve some of the fields from the resulting data.
Only add a handful accessor functions; more can be added as the need
arises. The fields added are fw_revision, partition_align, and
lsa_size.
Cc: Ben Widawsky <ben.widawsky@intel.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
---
cxl/lib/private.h | 19 ++++++++++++++++++
cxl/lib/libcxl.c | 49 ++++++++++++++++++++++++++++++++++++++++++++++
cxl/libcxl.h | 4 ++++
cxl/lib/libcxl.sym | 4 ++++
4 files changed, 76 insertions(+)
diff --git a/cxl/lib/private.h b/cxl/lib/private.h
index 87ca17e..3273f21 100644
--- a/cxl/lib/private.h
+++ b/cxl/lib/private.h
@@ -54,6 +54,25 @@ struct cxl_cmd {
int status;
};
+#define CXL_CMD_IDENTIFY_FW_REV_LENGTH 0x10
+
+struct cxl_cmd_identify {
+ char fw_revision[CXL_CMD_IDENTIFY_FW_REV_LENGTH];
+ le64 total_capacity;
+ le64 volatile_capacity;
+ le64 persistent_capacity;
+ le64 partition_align;
+ le16 info_event_log_size;
+ le16 warning_event_log_size;
+ le16 failure_event_log_size;
+ le16 fatal_event_log_size;
+ le32 lsa_size;
+ u8 poison_list_max_mer[3];
+ le16 inject_poison_limit;
+ u8 poison_caps;
+ u8 qos_telemetry_caps;
+} __attribute__((packed));
+
static inline int check_kmod(struct kmod_ctx *kmod_ctx)
{
return kmod_ctx ? 0 : -ENXIO;
diff --git a/cxl/lib/libcxl.c b/cxl/lib/libcxl.c
index f1155a1..4751cba 100644
--- a/cxl/lib/libcxl.c
+++ b/cxl/lib/libcxl.c
@@ -13,7 +13,10 @@
#include <sys/sysmacros.h>
#include <uuid/uuid.h>
#include <ccan/list/list.h>
+#include <ccan/endian/endian.h>
+#include <ccan/minmax/minmax.h>
#include <ccan/array_size/array_size.h>
+#include <ccan/short_types/short_types.h>
#include <util/log.h>
#include <util/sysfs.h>
@@ -675,6 +678,52 @@ CXL_EXPORT const char *cxl_cmd_get_devname(struct cxl_cmd *cmd)
return cxl_memdev_get_devname(cmd->memdev);
}
+CXL_EXPORT struct cxl_cmd *cxl_cmd_new_identify(struct cxl_memdev *memdev)
+{
+ return cxl_cmd_new_generic(memdev, CXL_MEM_COMMAND_ID_IDENTIFY);
+}
+
+CXL_EXPORT int cxl_cmd_identify_get_fw_rev(struct cxl_cmd *cmd, char *fw_rev,
+ int fw_len)
+{
+ struct cxl_cmd_identify *id = (void *)cmd->send_cmd->out.payload;
+
+ if (cmd->send_cmd->id != CXL_MEM_COMMAND_ID_IDENTIFY)
+ return -EINVAL;
+ if (cmd->status < 0)
+ return cmd->status;
+
+ if (fw_len > 0)
+ memcpy(fw_rev, id->fw_revision,
+ min(fw_len, CXL_CMD_IDENTIFY_FW_REV_LENGTH));
+ return 0;
+}
+
+CXL_EXPORT unsigned long long cxl_cmd_identify_get_partition_align(
+ struct cxl_cmd *cmd)
+{
+ struct cxl_cmd_identify *id = (void *)cmd->send_cmd->out.payload;
+
+ if (cmd->send_cmd->id != CXL_MEM_COMMAND_ID_IDENTIFY)
+ return -EINVAL;
+ if (cmd->status < 0)
+ return cmd->status;
+
+ return le64_to_cpu(id->partition_align);
+}
+
+CXL_EXPORT unsigned int cxl_cmd_identify_get_lsa_size(struct cxl_cmd *cmd)
+{
+ struct cxl_cmd_identify *id = (void *)cmd->send_cmd->out.payload;
+
+ if (cmd->send_cmd->id != CXL_MEM_COMMAND_ID_IDENTIFY)
+ return -EINVAL;
+ if (cmd->status < 0)
+ return cmd->status;
+
+ return le32_to_cpu(id->lsa_size);
+}
+
CXL_EXPORT struct cxl_cmd *cxl_cmd_new_raw(struct cxl_memdev *memdev,
int opcode)
{
diff --git a/cxl/libcxl.h b/cxl/libcxl.h
index 6e87b80..9ed8c83 100644
--- a/cxl/libcxl.h
+++ b/cxl/libcxl.h
@@ -58,6 +58,10 @@ void cxl_cmd_unref(struct cxl_cmd *cmd);
int cxl_cmd_submit(struct cxl_cmd *cmd);
int cxl_cmd_get_mbox_status(struct cxl_cmd *cmd);
int cxl_cmd_get_out_size(struct cxl_cmd *cmd);
+struct cxl_cmd *cxl_cmd_new_identify(struct cxl_memdev *memdev);
+int cxl_cmd_identify_get_fw_rev(struct cxl_cmd *cmd, char *fw_rev, int fw_len);
+unsigned long long cxl_cmd_identify_get_partition_align(struct cxl_cmd *cmd);
+unsigned int cxl_cmd_identify_get_lsa_size(struct cxl_cmd *cmd);
#ifdef __cplusplus
} /* extern "C" */
diff --git a/cxl/lib/libcxl.sym b/cxl/lib/libcxl.sym
index 493429c..d6aa0b2 100644
--- a/cxl/lib/libcxl.sym
+++ b/cxl/lib/libcxl.sym
@@ -39,4 +39,8 @@ global:
cxl_cmd_submit;
cxl_cmd_get_mbox_status;
cxl_cmd_get_out_size;
+ cxl_cmd_new_identify;
+ cxl_cmd_identify_get_fw_rev;
+ cxl_cmd_identify_get_partition_align;
+ cxl_cmd_identify_get_lsa_size;
} LIBCXL_2;
--
2.29.2
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next prev parent reply other threads:[~2021-02-19 2:04 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-19 2:03 [ndctl PATCH v2 00/13] Initial CXL support Vishal Verma
2021-02-19 2:03 ` [ndctl PATCH v2 01/13] cxl: add a cxl utility and libcxl library Vishal Verma
2021-02-22 21:36 ` Ben Widawsky
2021-02-23 19:23 ` Verma, Vishal L
2021-02-19 2:03 ` [ndctl PATCH v2 02/13] cxl: add a local copy of the cxl_mem UAPI header Vishal Verma
2021-02-22 21:41 ` Ben Widawsky
2021-02-19 2:03 ` [ndctl PATCH v2 03/13] libcxl: add support for command query and submission Vishal Verma
2021-02-22 21:55 ` Ben Widawsky
2021-02-19 2:03 ` Vishal Verma [this message]
2021-02-22 22:02 ` [ndctl PATCH v2 04/13] libcxl: add support for the 'Identify Device' command Ben Widawsky
2021-02-19 2:03 ` [ndctl PATCH v2 05/13] test: rename 'ndctl_test' to 'test_ctx' Vishal Verma
2021-02-19 2:03 ` [ndctl PATCH v2 06/13] test: rename 'ndctl_test_*' helpers to 'test_*' Vishal Verma
2021-02-19 2:03 ` [ndctl PATCH v2 07/13] test: introduce a libcxl unit test Vishal Verma
2021-02-22 22:15 ` Ben Widawsky
2021-02-19 2:03 ` [ndctl PATCH v2 08/13] libcxl: add GET_HEALTH_INFO mailbox command and accessors Vishal Verma
2021-02-19 2:03 ` [ndctl PATCH v2 09/13] libcxl: add support for the 'GET_LSA' command Vishal Verma
2021-02-19 2:03 ` [ndctl PATCH v2 10/13] util/hexdump: Add a util helper to print a buffer in hex Vishal Verma
2021-02-19 2:03 ` [ndctl PATCH v2 11/13] test/libcxl: add a test for {set, get}_lsa commands Vishal Verma
2021-02-19 2:03 ` [ndctl PATCH v2 12/13] Documentation/cxl: add library API documentation Vishal Verma
2021-02-19 2:03 ` [ndctl PATCH v2 13/13] test/libcxl: introduce a command size fuzzing test Vishal Verma
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