[ndctl PATCH v2 09/13] libcxl: add support for the 'GET_LSA' command

[Vishal Verma]

Add a command allocator and accessor APIs for the 'GET_LSA' mailbox
command.

Signed-off-by: Vishal Verma <vishal.l.ve...@intel.com>
---
 cxl/lib/private.h  |  5 +++++
 cxl/lib/libcxl.c   | 31 +++++++++++++++++++++++++++++++
 cxl/libcxl.h       |  3 +++
 cxl/lib/libcxl.sym |  2 ++
 4 files changed, 41 insertions(+)

diff --git a/cxl/lib/private.h b/cxl/lib/private.h
index 2232f4c..fb1dd8e 100644
--- a/cxl/lib/private.h
+++ b/cxl/lib/private.h
@@ -73,6 +73,11 @@ struct cxl_cmd_identify {
        u8 qos_telemetry_caps;
 } __attribute__((packed));
 
+struct cxl_cmd_get_lsa_in {
+       le32 offset;
+       le32 length;
+} __attribute__((packed));
+
 struct cxl_cmd_get_health_info {
        u8 health_status;
        u8 media_status;
diff --git a/cxl/lib/libcxl.c b/cxl/lib/libcxl.c
index d595d36..2edb79e 100644
--- a/cxl/lib/libcxl.c
+++ b/cxl/lib/libcxl.c
@@ -804,6 +804,37 @@ CXL_EXPORT struct cxl_cmd *cxl_cmd_new_raw(struct 
cxl_memdev *memdev,
        return cmd;
 }
 
+CXL_EXPORT struct cxl_cmd *cxl_cmd_new_get_lsa(struct cxl_memdev *memdev,
+               unsigned int offset, unsigned int length)
+{
+       struct cxl_cmd_get_lsa_in *get_lsa;
+       struct cxl_cmd *cmd;
+
+       cmd = cxl_cmd_new_generic(memdev, CXL_MEM_COMMAND_ID_GET_LSA);
+       if (!cmd)
+               return NULL;
+
+       get_lsa = (void *)cmd->send_cmd->in.payload;
+       get_lsa->offset = cpu_to_le32(offset);
+       get_lsa->length = cpu_to_le32(length);
+       return cmd;
+}
+
+#define cmd_get_void(cmd, N) \
+do { \
+       void *p = (void *)cmd->send_cmd->out.payload; \
+       if (cmd->send_cmd->id != CXL_MEM_COMMAND_ID_##N) \
+               return NULL; \
+       if (cmd->status < 0) \
+               return NULL; \
+       return p; \
+} while(0);
+
+CXL_EXPORT void *cxl_cmd_get_lsa_get_payload(struct cxl_cmd *cmd)
+{
+       cmd_get_void(cmd, GET_LSA);
+}
+
 CXL_EXPORT int cxl_cmd_submit(struct cxl_cmd *cmd)
 {
        struct cxl_memdev *memdev = cmd->memdev;
diff --git a/cxl/libcxl.h b/cxl/libcxl.h
index 56ae4af..6edbd8d 100644
--- a/cxl/libcxl.h
+++ b/cxl/libcxl.h
@@ -71,6 +71,9 @@ int cxl_cmd_get_health_info_get_temperature(struct cxl_cmd 
*cmd);
 int cxl_cmd_get_health_info_get_dirty_shutdowns(struct cxl_cmd *cmd);
 int cxl_cmd_get_health_info_get_volatile_errors(struct cxl_cmd *cmd);
 int cxl_cmd_get_health_info_get_pmem_errors(struct cxl_cmd *cmd);
+struct cxl_cmd *cxl_cmd_new_get_lsa(struct cxl_memdev *memdev,
+               unsigned int offset, unsigned int length);
+void *cxl_cmd_get_lsa_get_payload(struct cxl_cmd *cmd);
 
 #ifdef __cplusplus
 } /* extern "C" */
diff --git a/cxl/lib/libcxl.sym b/cxl/lib/libcxl.sym
index e00443d..2c6193b 100644
--- a/cxl/lib/libcxl.sym
+++ b/cxl/lib/libcxl.sym
@@ -52,4 +52,6 @@ global:
        cxl_cmd_get_health_info_get_dirty_shutdowns;
        cxl_cmd_get_health_info_get_volatile_errors;
        cxl_cmd_get_health_info_get_pmem_errors;
+       cxl_cmd_new_get_lsa;
+       cxl_cmd_get_lsa_get_payload;
 } LIBCXL_2;
-- 
2.29.2
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