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From 101966ed3e4a73a6e0e1c269306e976040e068a9 Mon Sep 17 00:00:00 2001
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From: Vishal Verma <vishal.l.verma@intel.com>
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Date: Thu, 7 Oct 2021 02:21:32 -0600
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Subject: [PATCH 039/217] libcxl: add label_size to cxl_memdev, and an API to
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retrieve it
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Size of the Label Storage Area (LSA) is available as a sysfs attribute
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called 'label_storage_size'. Add that to libcxl's memdev so that it is available
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for label related commands.
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Cc: Dan Williams <dan.j.williams@intel.com>
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Reviewed-by: Dan Williams <dan.j.williams@intel.com>
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Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
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---
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cxl/lib/libcxl.c | 12 ++++++++++++
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cxl/lib/libcxl.sym | 1 +
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cxl/lib/private.h | 1 +
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cxl/libcxl.h | 1 +
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4 files changed, 15 insertions(+)
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diff --git a/cxl/lib/libcxl.c b/cxl/lib/libcxl.c
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index 76913a2..def3a97 100644
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--- a/cxl/lib/libcxl.c
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+++ b/cxl/lib/libcxl.c
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@@ -247,6 +247,13 @@ static void *add_cxl_memdev(void *parent, int id, const char *cxlmem_base)
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if (memdev->payload_max < 0)
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goto err_read;
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+ sprintf(path, "%s/label_storage_size", cxlmem_base);
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+ if (sysfs_read_attr(ctx, path, buf) < 0)
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+ goto err_read;
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+ memdev->lsa_size = strtoull(buf, NULL, 0);
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+ if (memdev->lsa_size == ULLONG_MAX)
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+ goto err_read;
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+
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memdev->dev_path = strdup(cxlmem_base);
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if (!memdev->dev_path)
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goto err_read;
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@@ -350,6 +357,11 @@ CXL_EXPORT const char *cxl_memdev_get_firmware_verison(struct cxl_memdev *memdev
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return memdev->firmware_version;
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}
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+CXL_EXPORT size_t cxl_memdev_get_label_size(struct cxl_memdev *memdev)
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+{
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+ return memdev->lsa_size;
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+}
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+
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CXL_EXPORT void cxl_cmd_unref(struct cxl_cmd *cmd)
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{
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if (!cmd)
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diff --git a/cxl/lib/libcxl.sym b/cxl/lib/libcxl.sym
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index 629322c..858e953 100644
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--- a/cxl/lib/libcxl.sym
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+++ b/cxl/lib/libcxl.sym
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@@ -64,6 +64,7 @@ global:
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cxl_cmd_health_info_get_pmem_errors;
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cxl_cmd_new_read_label;
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cxl_cmd_read_label_get_payload;
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+ cxl_memdev_get_label_size;
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local:
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*;
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};
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diff --git a/cxl/lib/private.h b/cxl/lib/private.h
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index bf3a897..c4ed741 100644
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--- a/cxl/lib/private.h
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+++ b/cxl/lib/private.h
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@@ -21,6 +21,7 @@ struct cxl_memdev {
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unsigned long long pmem_size;
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unsigned long long ram_size;
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int payload_max;
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+ size_t lsa_size;
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struct kmod_module *module;
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};
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diff --git a/cxl/libcxl.h b/cxl/libcxl.h
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index 7408745..d3b97a1 100644
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--- a/cxl/libcxl.h
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+++ b/cxl/libcxl.h
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@@ -42,6 +42,7 @@ struct cxl_ctx *cxl_memdev_get_ctx(struct cxl_memdev *memdev);
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unsigned long long cxl_memdev_get_pmem_size(struct cxl_memdev *memdev);
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unsigned long long cxl_memdev_get_ram_size(struct cxl_memdev *memdev);
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const char *cxl_memdev_get_firmware_verison(struct cxl_memdev *memdev);
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+size_t cxl_memdev_get_label_size(struct cxl_memdev *memdev);
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#define cxl_memdev_foreach(ctx, memdev) \
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for (memdev = cxl_memdev_get_first(ctx); \
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--
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2.27.0
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