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powerpc/powernv: Add opal-prd channel

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This change adds a char device to access the "PRD" (processor runtime
diagnostics) channel to OPAL firmware.

Includes contributions from Vaidyanathan Srinivasan, Neelesh Gupta &
Vishal Kulkarni.

Signed-off-by: Neelesh Gupta <neelegup@linux.vnet.ibm.com>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Acked-by: Stewart Smith <stewart@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Jeremy Kerr
2015-06-04 21:51:47 +08:00
committed by Michael Ellerman
parent 594fcb9ec9
commit 0d7cd8550d
8 changed files with 535 additions and 2 deletions
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21
arch/powerpc/include/asm/opal-api.h
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@@ -153,7 +153,8 @@
#define OPAL_FLASH_READ 110
#define OPAL_FLASH_WRITE 111
#define OPAL_FLASH_ERASE 112
#define OPAL_LAST 112
#define OPAL_PRD_MSG 113
#define OPAL_LAST 113
/* Device tree flags */
@@ -359,6 +360,7 @@ enum opal_msg_type {
OPAL_MSG_SHUTDOWN, /* params[0] = 1 reboot, 0 shutdown */
OPAL_MSG_HMI_EVT,
OPAL_MSG_DPO,
OPAL_MSG_PRD,
OPAL_MSG_TYPE_MAX,
};
@@ -681,6 +683,23 @@ typedef struct oppanel_line {
__be64 line_len;
} oppanel_line_t;
enum opal_prd_msg_type {
OPAL_PRD_MSG_TYPE_INIT = 0, /* HBRT --> OPAL */
OPAL_PRD_MSG_TYPE_FINI, /* HBRT/kernel --> OPAL */
OPAL_PRD_MSG_TYPE_ATTN, /* HBRT <-- OPAL */
OPAL_PRD_MSG_TYPE_ATTN_ACK, /* HBRT --> OPAL */
OPAL_PRD_MSG_TYPE_OCC_ERROR, /* HBRT <-- OPAL */
OPAL_PRD_MSG_TYPE_OCC_RESET, /* HBRT <-- OPAL */
};
struct opal_prd_msg_header {
uint8_t type;
uint8_t pad[1];
__be16 size;
};
struct opal_prd_msg;
/*
* SG entries
*