diff mbox series

[v2,01/10] cxl/mbox: Add GET_SUPPORTED_FEATURES mailbox command

Message ID 20231121101844.1161-2-shiju.jose@huawei.com
State Superseded
Headers show
Series cxl: Add support for CXL feature commands, CXL device patrol scrub control and DDR5 ECS control features | expand

Commit Message

Shiju Jose Nov. 21, 2023, 10:18 a.m. UTC
From: Shiju Jose <shiju.jose@huawei.com>

Add support for GET_SUPPORTED_FEATURES mailbox command.

CXL spec 3.0 section 8.2.9.6 describes optional device specific features.
CXL devices supports features with changeable attributes.
Get Supported Features retrieves the list of supported device specific
features. The settings of a feature can be retrieved using Get Feature
and optionally modified using Set Feature.

Signed-off-by: Shiju Jose <shiju.jose@huawei.com>
---
 drivers/cxl/core/mbox.c      | 24 +++++++++++++++
 drivers/cxl/cxlmem.h         | 59 ++++++++++++++++++++++++++++++++++++
 include/uapi/linux/cxl_mem.h |  1 +
 3 files changed, 84 insertions(+)

Comments

kernel test robot Nov. 21, 2023, 9:27 p.m. UTC | #1
Hi,

kernel test robot noticed the following build warnings:

[auto build test WARNING on linus/master]
[also build test WARNING on v6.7-rc2 next-20231121]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/shiju-jose-huawei-com/cxl-mbox-Add-GET_SUPPORTED_FEATURES-mailbox-command/20231121-182247
base:   linus/master
patch link:    https://lore.kernel.org/r/20231121101844.1161-2-shiju.jose%40huawei.com
patch subject: [PATCH v2 01/10] cxl/mbox: Add GET_SUPPORTED_FEATURES mailbox command
config: arc-randconfig-r113-20231122 (https://download.01.org/0day-ci/archive/20231122/202311220525.o2AUzf97-lkp@intel.com/config)
compiler: arceb-elf-gcc (GCC) 13.2.0
reproduce: (https://download.01.org/0day-ci/archive/20231122/202311220525.o2AUzf97-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202311220525.o2AUzf97-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/cxl/core/mbox.c:1318:31: sparse: sparse: incorrect type in initializer (different base types) @@     expected unsigned int [usertype] size_out @@     got restricted __le32 [usertype] count @@
   drivers/cxl/core/mbox.c:1318:31: sparse:     expected unsigned int [usertype] size_out
   drivers/cxl/core/mbox.c:1318:31: sparse:     got restricted __le32 [usertype] count

vim +1318 drivers/cxl/core/mbox.c

  1306	
  1307	int cxl_get_supported_features(struct cxl_memdev_state *mds,
  1308							struct cxl_mbox_get_supp_feats_in *pi,
  1309							void *feats_out)
  1310	{
  1311		struct cxl_mbox_cmd mbox_cmd;
  1312		int rc;
  1313	
  1314		mbox_cmd = (struct cxl_mbox_cmd) {
  1315			.opcode = CXL_MBOX_OP_GET_SUPPORTED_FEATURES,
  1316			.size_in = sizeof(*pi),
  1317			.payload_in = pi,
> 1318			.size_out = pi->count,
  1319			.payload_out = feats_out,
  1320			.min_out = sizeof(struct cxl_mbox_get_supp_feats_out),
  1321		};
  1322		rc = cxl_internal_send_cmd(mds, &mbox_cmd);
  1323		if (rc < 0)
  1324			return rc;
  1325	
  1326		return 0;
  1327	}
  1328	EXPORT_SYMBOL_NS_GPL(cxl_get_supported_features, CXL);
  1329
kernel test robot Nov. 22, 2023, 12:04 a.m. UTC | #2
Hi,

kernel test robot noticed the following build warnings:

[auto build test WARNING on linus/master]
[also build test WARNING on v6.7-rc2 next-20231121]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/shiju-jose-huawei-com/cxl-mbox-Add-GET_SUPPORTED_FEATURES-mailbox-command/20231121-182247
base:   linus/master
patch link:    https://lore.kernel.org/r/20231121101844.1161-2-shiju.jose%40huawei.com
patch subject: [PATCH v2 01/10] cxl/mbox: Add GET_SUPPORTED_FEATURES mailbox command
config: alpha-randconfig-r112-20231122 (https://download.01.org/0day-ci/archive/20231122/202311220753.mm74Rat7-lkp@intel.com/config)
compiler: alpha-linux-gcc (GCC) 13.2.0
reproduce: (https://download.01.org/0day-ci/archive/20231122/202311220753.mm74Rat7-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202311220753.mm74Rat7-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/cxl/core/mbox.c:1318:31: sparse: sparse: incorrect type in initializer (different base types) @@     expected unsigned long [usertype] size_out @@     got restricted __le32 [usertype] count @@
   drivers/cxl/core/mbox.c:1318:31: sparse:     expected unsigned long [usertype] size_out
   drivers/cxl/core/mbox.c:1318:31: sparse:     got restricted __le32 [usertype] count

vim +1318 drivers/cxl/core/mbox.c

  1306	
  1307	int cxl_get_supported_features(struct cxl_memdev_state *mds,
  1308							struct cxl_mbox_get_supp_feats_in *pi,
  1309							void *feats_out)
  1310	{
  1311		struct cxl_mbox_cmd mbox_cmd;
  1312		int rc;
  1313	
  1314		mbox_cmd = (struct cxl_mbox_cmd) {
  1315			.opcode = CXL_MBOX_OP_GET_SUPPORTED_FEATURES,
  1316			.size_in = sizeof(*pi),
  1317			.payload_in = pi,
> 1318			.size_out = pi->count,
  1319			.payload_out = feats_out,
  1320			.min_out = sizeof(struct cxl_mbox_get_supp_feats_out),
  1321		};
  1322		rc = cxl_internal_send_cmd(mds, &mbox_cmd);
  1323		if (rc < 0)
  1324			return rc;
  1325	
  1326		return 0;
  1327	}
  1328	EXPORT_SYMBOL_NS_GPL(cxl_get_supported_features, CXL);
  1329
diff mbox series

Patch

diff --git a/drivers/cxl/core/mbox.c b/drivers/cxl/core/mbox.c
index 36270dcfb42e..06ec9ef50e7f 100644
--- a/drivers/cxl/core/mbox.c
+++ b/drivers/cxl/core/mbox.c
@@ -63,6 +63,7 @@  static struct cxl_mem_command cxl_mem_commands[CXL_MEM_COMMAND_ID_MAX] = {
 	CXL_CMD(GET_SHUTDOWN_STATE, 0, 0x1, 0),
 	CXL_CMD(SET_SHUTDOWN_STATE, 0x1, 0, 0),
 	CXL_CMD(GET_SCAN_MEDIA_CAPS, 0x10, 0x4, 0),
+	CXL_CMD(GET_SUPPORTED_FEATURES, 0x8, CXL_VARIABLE_PAYLOAD, 0),
 };
 
 /*
@@ -1303,6 +1304,29 @@  int cxl_set_timestamp(struct cxl_memdev_state *mds)
 }
 EXPORT_SYMBOL_NS_GPL(cxl_set_timestamp, CXL);
 
+int cxl_get_supported_features(struct cxl_memdev_state *mds,
+						struct cxl_mbox_get_supp_feats_in *pi,
+						void *feats_out)
+{
+	struct cxl_mbox_cmd mbox_cmd;
+	int rc;
+
+	mbox_cmd = (struct cxl_mbox_cmd) {
+		.opcode = CXL_MBOX_OP_GET_SUPPORTED_FEATURES,
+		.size_in = sizeof(*pi),
+		.payload_in = pi,
+		.size_out = pi->count,
+		.payload_out = feats_out,
+		.min_out = sizeof(struct cxl_mbox_get_supp_feats_out),
+	};
+	rc = cxl_internal_send_cmd(mds, &mbox_cmd);
+	if (rc < 0)
+		return rc;
+
+	return 0;
+}
+EXPORT_SYMBOL_NS_GPL(cxl_get_supported_features, CXL);
+
 int cxl_mem_get_poison(struct cxl_memdev *cxlmd, u64 offset, u64 len,
 		       struct cxl_region *cxlr)
 {
diff --git a/drivers/cxl/cxlmem.h b/drivers/cxl/cxlmem.h
index a2fcbca253f3..d831dad748f5 100644
--- a/drivers/cxl/cxlmem.h
+++ b/drivers/cxl/cxlmem.h
@@ -506,6 +506,7 @@  enum cxl_opcode {
 	CXL_MBOX_OP_SET_TIMESTAMP	= 0x0301,
 	CXL_MBOX_OP_GET_SUPPORTED_LOGS	= 0x0400,
 	CXL_MBOX_OP_GET_LOG		= 0x0401,
+	CXL_MBOX_OP_GET_SUPPORTED_FEATURES	= 0x0500,
 	CXL_MBOX_OP_IDENTIFY		= 0x4000,
 	CXL_MBOX_OP_GET_PARTITION_INFO	= 0x4100,
 	CXL_MBOX_OP_SET_PARTITION_INFO	= 0x4101,
@@ -740,6 +741,61 @@  struct cxl_mbox_set_timestamp_in {
 
 } __packed;
 
+/* Get Supported Features CXL 3.0 Spec 8.2.9.6.1 */
+/*
+ * Get Supported Features input payload
+ * CXL rev 3.0 section 8.2.9.6.1; Table 8-75
+ */
+struct cxl_mbox_get_supp_feats_in {
+	__le32 count;
+	__le16 start_index;
+	u16 reserved;
+} __packed;
+
+/*
+ * Get Supported Features Supported Feature Entry
+ * CXL rev 3.0 section 8.2.9.6.1; Table 8-77
+ */
+/* Supported Feature Entry : Payload out attribute flags */
+#define CXL_FEAT_ENTRY_FLAG_CHANGABLE	BIT(0)
+#define CXL_FEAT_ENTRY_FLAG_DEEPEST_RESET_PERSISTENCE_MASK	GENMASK(3, 1)
+
+enum cxl_feat_attrib_value_persistence {
+	CXL_FEAT_ATTRIB_VALUE_PERSISTENCE_NONE = 0x0,
+	CXL_FEAT_ATTRIB_VALUE_PERSISTENCE_CXL_RESET = 0x1,
+	CXL_FEAT_ATTRIB_VALUE_PERSISTENCE_HOT_RESET = 0x2,
+	CXL_FEAT_ATTRIB_VALUE_PERSISTENCE_WARM_RESET = 0x3,
+	CXL_FEAT_ATTRIB_VALUE_PERSISTENCE_COLD_RESET = 0x4,
+	CXL_FEAT_ATTRIB_VALUE_PERSISTENCE_MAX
+};
+
+#define CXL_FEAT_ENTRY_FLAG_PERSISTENCE_ACROSS_FW_UPDATE_MASK	BIT(4)
+#define CXL_FEAT_ENTRY_FLAG_PERSISTENCE_DEFAULT_SEL_SUPPORT_MASK	BIT(5)
+#define CXL_FEAT_ENTRY_FLAG_PERSISTENCE_SAVED_SEL_SUPPORT_MASK	BIT(6)
+
+struct cxl_mbox_supp_feat_entry {
+	uuid_t uuid;
+	__le16 feat_index;
+	__le16 get_feat_size;
+	__le16 set_feat_size;
+	__le32 attrb_flags;
+	u8 get_feat_version;
+	u8 set_feat_version;
+	__le16 set_feat_effects;
+	u8 rsvd[18];
+}  __packed;
+
+/*
+ * Get Supported Features output payload
+ * CXL rev 3.0 section 8.2.9.6.1; Table 8-76
+ */
+struct cxl_mbox_get_supp_feats_out {
+	__le16 entries;
+	__le16 nsuppfeats_dev;
+	u32 reserved;
+	struct cxl_mbox_supp_feat_entry feat_entries[];
+} __packed;
+
 /* Get Poison List  CXL 3.0 Spec 8.2.9.8.4.1 */
 struct cxl_mbox_poison_in {
 	__le64 offset;
@@ -867,6 +923,9 @@  void clear_exclusive_cxl_commands(struct cxl_memdev_state *mds,
 				  unsigned long *cmds);
 void cxl_mem_get_event_records(struct cxl_memdev_state *mds, u32 status);
 int cxl_set_timestamp(struct cxl_memdev_state *mds);
+int cxl_get_supported_features(struct cxl_memdev_state *mds,
+			       struct cxl_mbox_get_supp_feats_in *pi,
+			       void *feats_out);
 int cxl_poison_state_init(struct cxl_memdev_state *mds);
 int cxl_mem_get_poison(struct cxl_memdev *cxlmd, u64 offset, u64 len,
 		       struct cxl_region *cxlr);
diff --git a/include/uapi/linux/cxl_mem.h b/include/uapi/linux/cxl_mem.h
index 14bc6e742148..656450274001 100644
--- a/include/uapi/linux/cxl_mem.h
+++ b/include/uapi/linux/cxl_mem.h
@@ -46,6 +46,7 @@ 
 	___C(GET_SCAN_MEDIA_CAPS, "Get Scan Media Capabilities"),         \
 	___DEPRECATED(SCAN_MEDIA, "Scan Media"),                          \
 	___DEPRECATED(GET_SCAN_MEDIA, "Get Scan Media Results"),          \
+	___C(GET_SUPPORTED_FEATURES, "Get Supported Features"),           \
 	___C(MAX, "invalid / last command")
 
 #define ___C(a, b) CXL_MEM_COMMAND_ID_##a