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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: Vasant Hegde <hegdevasant@linux.vnet.ibm.com>
[mpe: Make the error string clear that it's the PRD2 event that failed]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190826065701.8853-2-hegdevasant@linux.vnet.ibm.com
This commit is contained in:
Vasant Hegde 2019-08-26 12:27:01 +05:30 committed by Michael Ellerman
parent 2be1d5d147
commit 587164cd59
2 changed files with 8 additions and 1 deletions
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1
arch/powerpc/include/asm/opal-api.h
View File

@ -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,
};

8
arch/powerpc/platforms/powernv/opal-prd.c
View File

@ -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");