aacraid: Log firmware AIF messages

Firmware AIF messages about cache loss and data recovery are being missed
by the driver since currently they are not captured but rather let go.
This patch to capture those messages and log them for the user.
Signed-off-by: Raghava Aditya Renukunta <RaghavaAditya.Renukunta@microsemi.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/aacraid/aacraid.h

@@ -2065,6 +2065,10 @@ extern struct aac_common aac_config;
 #define			AifEnAddJBOD		30	/* JBOD created */
 #define			AifEnDeleteJBOD		31	/* JBOD deleted */
 
+#define			AifBuManagerEvent		42 /* Bu management*/
+#define			AifBuCacheDataLoss		10
+#define			AifBuCacheDataRecover	11
+
 #define		AifCmdJobProgress	2	/* Progress report */
 #define			AifJobCtrZero	101	/* Array Zero progress */
 #define			AifJobStsSuccess 1	/* Job completes */

drivers/scsi/aacraid/commsup.c

@@ -901,6 +901,31 @@ void aac_printf(struct aac_dev *dev, u32 val)
 	memset(cp, 0, 256);
 }
 
+static inline int aac_aif_data(struct aac_aifcmd *aifcmd, uint32_t index)
+{
+	return le32_to_cpu(((__le32 *)aifcmd->data)[index]);
+}
+
+
+static void aac_handle_aif_bu(struct aac_dev *dev, struct aac_aifcmd *aifcmd)
+{
+	switch (aac_aif_data(aifcmd, 1)) {
+	case AifBuCacheDataLoss:
+		if (aac_aif_data(aifcmd, 2))
+			dev_info(&dev->pdev->dev, "Backup unit had cache data loss - [%d]\n",
+			aac_aif_data(aifcmd, 2));
+		else
+			dev_info(&dev->pdev->dev, "Backup Unit had cache data loss\n");
+		break;
+	case AifBuCacheDataRecover:
+		if (aac_aif_data(aifcmd, 2))
+			dev_info(&dev->pdev->dev, "DDR cache data recovered successfully - [%d]\n",
+			aac_aif_data(aifcmd, 2));
+		else
+			dev_info(&dev->pdev->dev, "DDR cache data recovered successfully\n");
+		break;
+	}
+}
 
 /**
  *	aac_handle_aif		-	Handle a message from the firmware
@@ -1154,6 +1179,8 @@ static void aac_handle_aif(struct aac_dev * dev, struct fib * fibptr)
 				  ADD : DELETE;
 				break;
 			}
+			case AifBuManagerEvent:
+				aac_handle_aif_bu(dev, aifcmd);
 			break;
 		}
 

drivers/scsi/aacraid/linit.c

@@ -1299,6 +1299,8 @@ static int aac_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
 	else
 		shost->this_id = shost->max_id;
 
+	aac_intr_normal(aac, 0, 2, 0, NULL);
+
 	/*
 	 * dmb - we may need to move the setting of these parms somewhere else once
 	 * we get a fib that can report the actual numbers

drivers/scsi/aacraid/src.c

@@ -135,6 +135,7 @@ static irqreturn_t aac_src_intr_message(int irq, void *dev_id)
 
 	if (mode & AAC_INT_MODE_AIF) {
 		/* handle AIF */
+		if (dev->aif_thread && dev->fsa_dev)
 			aac_intr_normal(dev, 0, 2, 0, NULL);
 		if (dev->msi_enabled)
 			aac_src_access_devreg(dev, AAC_CLEAR_AIF_BIT);