[SCSI] megaraid_sas: infrastructure to get PDs from FW

Add system PDs to OS.  Driver implemented the get_pd_list function to
get the system PD from FW.

Signed-off-by Bo Yang<bo.yang@lsi.com>
Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>

drivers/scsi/megaraid/megaraid_sas.c

@@ -2036,6 +2036,98 @@ static int megasas_alloc_cmds(struct megasas_instance *instance)
 	return 0;
 }
 
+/*
+ * megasas_get_pd_list_info -	Returns FW's pd_list structure
+ * @instance:				Adapter soft state
+ * @pd_list:				pd_list structure
+ *
+ * Issues an internal command (DCMD) to get the FW's controller PD
+ * list structure.  This information is mainly used to find out SYSTEM
+ * supported by the FW.
+ */
+static int
+megasas_get_pd_list(struct megasas_instance *instance)
+{
+	int ret = 0, pd_index = 0;
+	struct megasas_cmd *cmd;
+	struct megasas_dcmd_frame *dcmd;
+	struct MR_PD_LIST *ci;
+	struct MR_PD_ADDRESS *pd_addr;
+	dma_addr_t ci_h = 0;
+
+	cmd = megasas_get_cmd(instance);
+
+	if (!cmd) {
+		printk(KERN_DEBUG "megasas (get_pd_list): Failed to get cmd\n");
+		return -ENOMEM;
+	}
+
+	dcmd = &cmd->frame->dcmd;
+
+	ci = pci_alloc_consistent(instance->pdev,
+		  MEGASAS_MAX_PD * sizeof(struct MR_PD_LIST), &ci_h);
+
+	if (!ci) {
+		printk(KERN_DEBUG "Failed to alloc mem for pd_list\n");
+		megasas_return_cmd(instance, cmd);
+		return -ENOMEM;
+	}
+
+	memset(ci, 0, sizeof(*ci));
+	memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
+
+	dcmd->mbox.b[0] = MR_PD_QUERY_TYPE_EXPOSED_TO_HOST;
+	dcmd->mbox.b[1] = 0;
+	dcmd->cmd = MFI_CMD_DCMD;
+	dcmd->cmd_status = 0xFF;
+	dcmd->sge_count = 1;
+	dcmd->flags = MFI_FRAME_DIR_READ;
+	dcmd->timeout = 0;
+	dcmd->data_xfer_len = MEGASAS_MAX_PD * sizeof(struct MR_PD_LIST);
+	dcmd->opcode = MR_DCMD_PD_LIST_QUERY;
+	dcmd->sgl.sge32[0].phys_addr = ci_h;
+	dcmd->sgl.sge32[0].length = MEGASAS_MAX_PD * sizeof(struct MR_PD_LIST);
+
+	if (!megasas_issue_polled(instance, cmd)) {
+		ret = 0;
+	} else {
+		ret = -1;
+	}
+
+	/*
+	* the following function will get the instance PD LIST.
+	*/
+
+	pd_addr = ci->addr;
+
+	if ( ret == 0 &&
+		(ci->count <
+		  (MEGASAS_MAX_PD_CHANNELS * MEGASAS_MAX_DEV_PER_CHANNEL))) {
+
+		memset(instance->pd_list, 0,
+			MEGASAS_MAX_PD * sizeof(struct megasas_pd_list));
+
+		for (pd_index = 0; pd_index < ci->count; pd_index++) {
+
+			instance->pd_list[pd_addr->deviceId].tid	=
+							pd_addr->deviceId;
+			instance->pd_list[pd_addr->deviceId].driveType	=
+							pd_addr->scsiDevType;
+			instance->pd_list[pd_addr->deviceId].driveState	=
+							MR_PD_STATE_SYSTEM;
+			pd_addr++;
+		}
+	}
+
+	pci_free_consistent(instance->pdev,
+				MEGASAS_MAX_PD * sizeof(struct MR_PD_LIST),
+				ci, ci_h);
+	megasas_return_cmd(instance, cmd);
+
+	return ret;
+}
+
+
 /**
  * megasas_get_controller_info -	Returns FW's controller structure
  * @instance:				Adapter soft state
@@ -2326,6 +2418,10 @@ static int megasas_init_mfi(struct megasas_instance *instance)
 	if (megasas_issue_init_mfi(instance))
 		goto fail_fw_init;
 
+	memset(instance->pd_list, 0 ,
+		(MEGASAS_MAX_PD * sizeof(struct megasas_pd_list)));
+	megasas_get_pd_list(instance);
+
 	ctrl_info = kmalloc(sizeof(struct megasas_ctrl_info), GFP_KERNEL);
 
 	/*

drivers/scsi/megaraid/megaraid_sas.h

@@ -133,6 +133,7 @@
 #define MR_DCMD_CLUSTER				0x08000000
 #define MR_DCMD_CLUSTER_RESET_ALL		0x08010100
 #define MR_DCMD_CLUSTER_RESET_LD		0x08010200
+#define MR_DCMD_PD_LIST_QUERY                   0x02010100
 
 /*
  * MFI command completion codes
@@ -253,9 +254,89 @@ enum MR_EVT_ARGS {
 	MR_EVT_ARGS_STR,
 	MR_EVT_ARGS_TIME,
 	MR_EVT_ARGS_ECC,
+	MR_EVT_ARGS_LD_PROP,
+	MR_EVT_ARGS_PD_SPARE,
+	MR_EVT_ARGS_PD_INDEX,
+	MR_EVT_ARGS_DIAG_PASS,
+	MR_EVT_ARGS_DIAG_FAIL,
+	MR_EVT_ARGS_PD_LBA_LBA,
+	MR_EVT_ARGS_PORT_PHY,
+	MR_EVT_ARGS_PD_MISSING,
+	MR_EVT_ARGS_PD_ADDRESS,
+	MR_EVT_ARGS_BITMAP,
+	MR_EVT_ARGS_CONNECTOR,
+	MR_EVT_ARGS_PD_PD,
+	MR_EVT_ARGS_PD_FRU,
+	MR_EVT_ARGS_PD_PATHINFO,
+	MR_EVT_ARGS_PD_POWER_STATE,
+	MR_EVT_ARGS_GENERIC,
+};
 
+/*
+ * define constants for device list query options
+ */
+enum MR_PD_QUERY_TYPE {
+	MR_PD_QUERY_TYPE_ALL                = 0,
+	MR_PD_QUERY_TYPE_STATE              = 1,
+	MR_PD_QUERY_TYPE_POWER_STATE        = 2,
+	MR_PD_QUERY_TYPE_MEDIA_TYPE         = 3,
+	MR_PD_QUERY_TYPE_SPEED              = 4,
+	MR_PD_QUERY_TYPE_EXPOSED_TO_HOST    = 5,
 };
 
+enum MR_PD_STATE {
+	MR_PD_STATE_UNCONFIGURED_GOOD   = 0x00,
+	MR_PD_STATE_UNCONFIGURED_BAD    = 0x01,
+	MR_PD_STATE_HOT_SPARE           = 0x02,
+	MR_PD_STATE_OFFLINE             = 0x10,
+	MR_PD_STATE_FAILED              = 0x11,
+	MR_PD_STATE_REBUILD             = 0x14,
+	MR_PD_STATE_ONLINE              = 0x18,
+	MR_PD_STATE_COPYBACK            = 0x20,
+	MR_PD_STATE_SYSTEM              = 0x40,
+ };
+
+
+ /*
+ * defines the physical drive address structure
+ */
+struct MR_PD_ADDRESS {
+	u16     deviceId;
+	u16     enclDeviceId;
+
+	union {
+		struct {
+			u8  enclIndex;
+			u8  slotNumber;
+		} mrPdAddress;
+		struct {
+			u8  enclPosition;
+			u8  enclConnectorIndex;
+		} mrEnclAddress;
+	};
+	u8      scsiDevType;
+	union {
+		u8      connectedPortBitmap;
+		u8      connectedPortNumbers;
+	};
+	u64     sasAddr[2];
+} __packed;
+
+/*
+ * defines the physical drive list structure
+ */
+struct MR_PD_LIST {
+	u32             size;
+	u32             count;
+	struct MR_PD_ADDRESS   addr[1];
+} __packed;
+
+struct megasas_pd_list {
+	u16             tid;
+	u8             driveType;
+	u8             driveState;
+} __packed;
+
 /*
  * SAS controller properties
  */
@@ -284,7 +365,7 @@ struct megasas_ctrl_prop {
 	u8 expose_encl_devices;
 	u8 reserved[38];
 
-} __attribute__ ((packed));
+} __packed;
 
 /*
  * SAS controller information
@@ -527,7 +608,7 @@ struct megasas_ctrl_info {
 
 	u8 pad[0x800 - 0x6a0];
 
-} __attribute__ ((packed));
+} __packed;
 
 /*
  * ===============================
@@ -542,6 +623,8 @@ struct megasas_ctrl_info {
 #define MEGASAS_DEFAULT_INIT_ID			-1
 #define MEGASAS_MAX_LUN				8
 #define MEGASAS_MAX_LD				64
+#define MEGASAS_MAX_PD                          (MEGASAS_MAX_PD_CHANNELS * \
+						MEGASAS_MAX_DEV_PER_CHANNEL)
 
 #define MEGASAS_DBG_LVL				1
 
@@ -1089,6 +1172,7 @@ struct megasas_instance {
 	unsigned long base_addr;
 	struct megasas_register_set __iomem *reg_set;
 
+	struct megasas_pd_list          pd_list[MEGASAS_MAX_PD];
 	s8 init_id;
 
 	u16 max_num_sge;