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From c7ae078f1050ed54e254377404af2ae0879f2a39 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 02:21:30 -0600
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Subject: [PATCH 038/217] libcxl: add support for the 'GET_LSA' command
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Add a command allocator and accessor APIs for the 'GET_LSA' mailbox
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command.
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Cc: Ben Widawsky <ben.widawsky@intel.com>
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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 | 36 ++++++++++++++++++++++++++++++++++++
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cxl/lib/libcxl.sym | 2 ++
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cxl/lib/private.h | 5 +++++
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cxl/libcxl.h | 4 ++++
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4 files changed, 47 insertions(+)
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diff --git a/cxl/lib/libcxl.c b/cxl/lib/libcxl.c
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index 065824d..76913a2 100644
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--- a/cxl/lib/libcxl.c
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+++ b/cxl/lib/libcxl.c
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@@ -1036,6 +1036,42 @@ CXL_EXPORT struct cxl_cmd *cxl_cmd_new_raw(struct cxl_memdev *memdev,
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return cmd;
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}
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+CXL_EXPORT struct cxl_cmd *cxl_cmd_new_read_label(struct cxl_memdev *memdev,
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+ unsigned int offset, unsigned int length)
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+{
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+ struct cxl_cmd_get_lsa_in *get_lsa;
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+ struct cxl_cmd *cmd;
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+
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+ cmd = cxl_cmd_new_generic(memdev, CXL_MEM_COMMAND_ID_GET_LSA);
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+ if (!cmd)
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+ return NULL;
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+
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+ get_lsa = (struct cxl_cmd_get_lsa_in *)cmd->send_cmd->in.payload;
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+ get_lsa->offset = cpu_to_le32(offset);
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+ get_lsa->length = cpu_to_le32(length);
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+ return cmd;
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+}
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+
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+CXL_EXPORT ssize_t cxl_cmd_read_label_get_payload(struct cxl_cmd *cmd,
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+ void *buf, unsigned int length)
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+{
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+ struct cxl_cmd_get_lsa_in *get_lsa;
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+ void *payload;
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+ int rc;
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+
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+ rc = cxl_cmd_validate_status(cmd, CXL_MEM_COMMAND_ID_GET_LSA);
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+ if (rc)
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+ return rc;
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+
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+ get_lsa = (struct cxl_cmd_get_lsa_in *)cmd->send_cmd->in.payload;
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+ if (length > le32_to_cpu(get_lsa->length))
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+ return -EINVAL;
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+
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+ payload = (void *)cmd->send_cmd->out.payload;
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+ memcpy(buf, payload, length);
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+ return length;
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+}
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+
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CXL_EXPORT int cxl_cmd_submit(struct cxl_cmd *cmd)
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{
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struct cxl_memdev *memdev = cmd->memdev;
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diff --git a/cxl/lib/libcxl.sym b/cxl/lib/libcxl.sym
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index c83bc28..629322c 100644
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--- a/cxl/lib/libcxl.sym
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+++ b/cxl/lib/libcxl.sym
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@@ -62,6 +62,8 @@ global:
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cxl_cmd_health_info_get_dirty_shutdowns;
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cxl_cmd_health_info_get_volatile_errors;
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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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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 885553a..bf3a897 100644
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--- a/cxl/lib/private.h
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+++ b/cxl/lib/private.h
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@@ -73,6 +73,11 @@ struct cxl_cmd_identify {
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u8 qos_telemetry_caps;
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} __attribute__((packed));
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+struct cxl_cmd_get_lsa_in {
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+ le32 offset;
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+ le32 length;
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+} __attribute__((packed));
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+
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struct cxl_cmd_get_health_info {
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u8 health_status;
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u8 media_status;
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diff --git a/cxl/libcxl.h b/cxl/libcxl.h
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index eae2db8..7408745 100644
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--- a/cxl/libcxl.h
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+++ b/cxl/libcxl.h
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@@ -95,6 +95,10 @@ int cxl_cmd_health_info_get_temperature(struct cxl_cmd *cmd);
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int cxl_cmd_health_info_get_dirty_shutdowns(struct cxl_cmd *cmd);
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int cxl_cmd_health_info_get_volatile_errors(struct cxl_cmd *cmd);
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int cxl_cmd_health_info_get_pmem_errors(struct cxl_cmd *cmd);
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+struct cxl_cmd *cxl_cmd_new_read_label(struct cxl_memdev *memdev,
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+ unsigned int offset, unsigned int length);
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+ssize_t cxl_cmd_read_label_get_payload(struct cxl_cmd *cmd, void *buf,
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+ unsigned int length);
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#ifdef __cplusplus
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} /* extern "C" */
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--
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2.27.0
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