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From: Vishal Verma <vishal.l.verma@intel.com>
To: <nvdimm@lists.linux.dev>, <linux-cxl@vger.kernel.org>
Cc: Dan Williams <dan.j.williams@intel.com>,
	Ben Widawsky <ben.widawsky@intel.com>,
	Alison Schofield <alison.schofield@intel.com>,
	Ira Weiny <ira.weiny@intel.com>,
	Vishal Verma <vishal.l.verma@intel.com>
Subject: [ndctl PATCH v3 14/21] libcxl: add lsa_size to cxl_memdev, and an API to retrieve it
Date: Thu,  1 Jul 2021 14:09:58 -0600	[thread overview]
Message-ID: <20210701201005.3065299-15-vishal.l.verma@intel.com> (raw)
In-Reply-To: <20210701201005.3065299-1-vishal.l.verma@intel.com>

Size of the Label Storage Area (LSA) is available as a sysfs attribute
called 'lsa_size'. Add that to libcxl's memdev so that it is available
for label related commands.

Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
---
 cxl/lib/private.h  |  1 +
 cxl/lib/libcxl.c   | 12 ++++++++++++
 cxl/libcxl.h       |  1 +
 cxl/lib/libcxl.sym |  5 +++++
 4 files changed, 19 insertions(+)

diff --git a/cxl/lib/private.h b/cxl/lib/private.h
index fb1dd8e..1bce3b5 100644
--- a/cxl/lib/private.h
+++ b/cxl/lib/private.h
@@ -21,6 +21,7 @@ struct cxl_memdev {
 	unsigned long long pmem_size;
 	unsigned long long ram_size;
 	int payload_max;
+	size_t lsa_size;
 	struct kmod_module *module;
 };
 
diff --git a/cxl/lib/libcxl.c b/cxl/lib/libcxl.c
index d2c38c9..ae03e03 100644
--- a/cxl/lib/libcxl.c
+++ b/cxl/lib/libcxl.c
@@ -246,6 +246,13 @@ static void *add_cxl_memdev(void *parent, int id, const char *cxlmem_base)
 	if (memdev->payload_max < 0)
 		goto err_read;
 
+	sprintf(path, "%s/label_storage_size", cxlmem_base);
+	if (sysfs_read_attr(ctx, path, buf) < 0)
+		goto err_read;
+	memdev->lsa_size = strtoull(buf, NULL, 0);
+	if (memdev->lsa_size == ULLONG_MAX)
+		goto err_read;
+
 	memdev->dev_path = strdup(cxlmem_base);
 	if (!memdev->dev_path)
 		goto err_read;
@@ -349,6 +356,11 @@ CXL_EXPORT const char *cxl_memdev_get_firmware_verison(struct cxl_memdev *memdev
 	return memdev->firmware_version;
 }
 
+CXL_EXPORT size_t cxl_memdev_get_lsa_size(struct cxl_memdev *memdev)
+{
+	return memdev->lsa_size;
+}
+
 CXL_EXPORT void cxl_cmd_unref(struct cxl_cmd *cmd)
 {
 	if (!cmd)
diff --git a/cxl/libcxl.h b/cxl/libcxl.h
index 6edbd8d..eeace11 100644
--- a/cxl/libcxl.h
+++ b/cxl/libcxl.h
@@ -42,6 +42,7 @@ struct cxl_ctx *cxl_memdev_get_ctx(struct cxl_memdev *memdev);
 unsigned long long cxl_memdev_get_pmem_size(struct cxl_memdev *memdev);
 unsigned long long cxl_memdev_get_ram_size(struct cxl_memdev *memdev);
 const char *cxl_memdev_get_firmware_verison(struct cxl_memdev *memdev);
+size_t cxl_memdev_get_lsa_size(struct cxl_memdev *memdev);
 
 #define cxl_memdev_foreach(ctx, memdev) \
         for (memdev = cxl_memdev_get_first(ctx); \
diff --git a/cxl/lib/libcxl.sym b/cxl/lib/libcxl.sym
index 2c6193b..a5a1371 100644
--- a/cxl/lib/libcxl.sym
+++ b/cxl/lib/libcxl.sym
@@ -55,3 +55,8 @@ global:
 	cxl_cmd_new_get_lsa;
 	cxl_cmd_get_lsa_get_payload;
 } LIBCXL_2;
+
+LIBCXL_4 {
+global:
+	cxl_memdev_get_lsa_size;
+} LIBCXL_3;
-- 
2.31.1


  parent reply	other threads:[~2021-07-01 20:10 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-01 20:09 [ndctl PATCH v3 00/21] Initial CXL support Vishal Verma
2021-07-01 20:09 ` [ndctl PATCH v3 01/21] ndctl: add .clang-format Vishal Verma
2021-07-10  1:12   ` Dan Williams
2021-07-01 20:09 ` [ndctl PATCH v3 02/21] cxl: add a cxl utility and libcxl library Vishal Verma
2021-07-10  1:12   ` Dan Williams
2021-07-13 21:14     ` Verma, Vishal L
2021-07-01 20:09 ` [ndctl PATCH v3 03/21] cxl: add a local copy of the cxl_mem UAPI header Vishal Verma
2021-07-10  1:13   ` Dan Williams
2021-07-01 20:09 ` [ndctl PATCH v3 04/21] libcxl: add support for command query and submission Vishal Verma
2021-07-13  5:12   ` Dan Williams
2021-07-13 21:17     ` Verma, Vishal L
2021-07-13 21:39       ` Dan Williams
2021-07-01 20:09 ` [ndctl PATCH v3 05/21] libcxl: add support for the 'Identify Device' command Vishal Verma
2021-07-15 23:50   ` Dan Williams
2021-07-01 20:09 ` [ndctl PATCH v3 06/21] test: rename 'ndctl_test' to 'test_ctx' Vishal Verma
2021-07-15 23:51   ` Dan Williams
2021-07-01 20:09 ` [ndctl PATCH v3 07/21] test: rename 'ndctl_test_*' helpers to 'test_*' Vishal Verma
2021-07-15 23:51   ` Dan Williams
2021-07-01 20:09 ` [ndctl PATCH v3 08/21] test: introduce a libcxl unit test Vishal Verma
2021-07-15 23:53   ` Dan Williams
2021-07-01 20:09 ` [ndctl PATCH v3 09/21] libcxl: add GET_HEALTH_INFO mailbox command and accessors Vishal Verma
2021-07-16  1:11   ` Dan Williams
2021-07-01 20:09 ` [ndctl PATCH v3 10/21] libcxl: add support for the 'GET_LSA' command Vishal Verma
2021-07-16  2:24   ` Dan Williams
2021-07-01 20:09 ` [ndctl PATCH v3 11/21] util/hexdump: Add a util helper to print a buffer in hex Vishal Verma
2021-07-01 20:09 ` [ndctl PATCH v3 12/21] test/libcxl: add a test for {set, get}_lsa commands Vishal Verma
2021-07-01 20:09 ` [ndctl PATCH v3 13/21] test/libcxl: introduce a command size fuzzing test Vishal Verma
2021-07-01 20:09 ` Vishal Verma [this message]
2021-07-01 20:09 ` [ndctl PATCH v3 15/21] libcxl: PLACEHOLDER: add an interface to determine whether a memdev is active Vishal Verma
2021-07-01 20:10 ` [ndctl PATCH v3 16/21] libcxl: add interfaces for label operations Vishal Verma
2021-07-01 20:10 ` [ndctl PATCH v3 17/21] test/libcxl: add a test for cxl_memdev_{get,set}_lsa Vishal Verma
2021-07-01 20:10 ` [ndctl PATCH v3 18/21] cxl: add commands to read, write, and zero labels Vishal Verma
2021-07-01 20:10 ` [ndctl PATCH v3 19/21] Documentation/cxl: add library API documentation Vishal Verma
2021-07-01 20:10 ` [ndctl PATCH v3 20/21] ndctl: Add CXL packages to the RPM spec Vishal Verma
2021-07-01 20:10 ` [ndctl PATCH v3 21/21] cxl-cli: add bash completion Vishal Verma
2021-07-01 20:13 ` [ndctl PATCH v3 00/21] Initial CXL support Verma, Vishal L

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