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Commit 587164cd authored by Vasant Hegde's avatar Vasant Hegde Committed by Michael Ellerman
Browse files

powerpc/powernv: Add new opal message type 



We have OPAL_MSG_PRD message type to pass prd related messages from
OPAL to `opal-prd`. It can handle messages upto 64 bytes. We have a
requirement to send bigger than 64 bytes of data from OPAL to
`opal-prd`. Lets add new message type (OPAL_MSG_PRD2) to pass bigger
data.

Signed-off-by: default avatarVasant Hegde <hegdevasant@linux.vnet.ibm.com>
[mpe: Make the error string clear that it's the PRD2 event that failed]
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190826065701.8853-2-hegdevasant@linux.vnet.ibm.com
parent 2be1d5d1

arch/powerpc/include/asm/opal-api.h

+1 −0
Original line number Diff line number Diff line
@@ -453,6 +453,7 @@ enum opal_msg_type { 
	OPAL_MSG_DPO		= 5,

	OPAL_MSG_PRD		= 6,

	OPAL_MSG_OCC		= 7,

	OPAL_MSG_PRD2		= 8,

	OPAL_MSG_TYPE_MAX,

};

arch/powerpc/platforms/powernv/opal-prd.c

+7 −1
Original line number Diff line number Diff line
@@ -342,7 +342,7 @@ static int opal_prd_msg_notifier(struct notifier_block *nb, 
	int msg_size, item_size;

	unsigned long flags;



	if (msg_type != OPAL_MSG_PRD)

	if (msg_type != OPAL_MSG_PRD && msg_type != OPAL_MSG_PRD2)

		return 0;



	/* Calculate total size of the message and item we need to store. The
@@ -393,6 +393,12 @@ static int opal_prd_probe(struct platform_device *pdev) 
		return rc;

	}



	rc = opal_message_notifier_register(OPAL_MSG_PRD2, &opal_prd_event_nb);

	if (rc) {

		pr_err("Couldn't register PRD2 event notifier\n");

		return rc;

	}



	rc = misc_register(&opal_prd_dev);

	if (rc) {

		pr_err("failed to register miscdev\n");