[PATCH RFC 2/9] powerpc/pseries: Define HVPIPE specific macros

[Haren Myneni <haren@linux.ibm.com>]

Define HVPIPE specific macros which are needed to support
ibm,send-hvpipe-msg and ibm,receive-hvpipe-msg RTAS calls
and used to handle HVPIPE message events.

Signed-off-by: Haren Myneni <haren@linux.ibm.com>
---
 arch/powerpc/include/asm/rtas.h |  9 +++++++++
 arch/powerpc/kernel/rtas.c      | 24 ++++++++++++++++++++++++
 arch/powerpc/kernel/rtasd.c     |  2 ++
 3 files changed, 35 insertions(+)

diff --git a/arch/powerpc/include/asm/rtas.h b/arch/powerpc/include/asm/rtas.h
index 75fa0293c508..d046bbd5017d 100644
--- a/arch/powerpc/include/asm/rtas.h
+++ b/arch/powerpc/include/asm/rtas.h
@@ -68,9 +68,11 @@ enum rtas_function_index {
 	RTAS_FNIDX__IBM_READ_PCI_CONFIG,
 	RTAS_FNIDX__IBM_READ_SLOT_RESET_STATE,
 	RTAS_FNIDX__IBM_READ_SLOT_RESET_STATE2,
+	RTAS_FNIDX__IBM_RECEIVE_HVPIPE_MSG,
 	RTAS_FNIDX__IBM_REMOVE_PE_DMA_WINDOW,
 	RTAS_FNIDX__IBM_RESET_PE_DMA_WINDOW,
 	RTAS_FNIDX__IBM_SCAN_LOG_DUMP,
+	RTAS_FNIDX__IBM_SEND_HVPIPE_MSG,
 	RTAS_FNIDX__IBM_SET_DYNAMIC_INDICATOR,
 	RTAS_FNIDX__IBM_SET_EEH_OPTION,
 	RTAS_FNIDX__IBM_SET_SLOT_RESET,
@@ -163,9 +165,11 @@ typedef struct {
 #define RTAS_FN_IBM_READ_PCI_CONFIG               rtas_fn_handle(RTAS_FNIDX__IBM_READ_PCI_CONFIG)
 #define RTAS_FN_IBM_READ_SLOT_RESET_STATE         rtas_fn_handle(RTAS_FNIDX__IBM_READ_SLOT_RESET_STATE)
 #define RTAS_FN_IBM_READ_SLOT_RESET_STATE2        rtas_fn_handle(RTAS_FNIDX__IBM_READ_SLOT_RESET_STATE2)
+#define RTAS_FN_IBM_RECEIVE_HVPIPE_MSG		  rtas_fn_handle(RTAS_FNIDX__IBM_RECEIVE_HVPIPE_MSG)
 #define RTAS_FN_IBM_REMOVE_PE_DMA_WINDOW          rtas_fn_handle(RTAS_FNIDX__IBM_REMOVE_PE_DMA_WINDOW)
 #define RTAS_FN_IBM_RESET_PE_DMA_WINDOW           rtas_fn_handle(RTAS_FNIDX__IBM_RESET_PE_DMA_WINDOW)
 #define RTAS_FN_IBM_SCAN_LOG_DUMP                 rtas_fn_handle(RTAS_FNIDX__IBM_SCAN_LOG_DUMP)
+#define RTAS_FN_IBM_SEND_HVPIPE_MSG		  rtas_fn_handle(RTAS_FNIDX__IBM_SEND_HVPIPE_MSG)
 #define RTAS_FN_IBM_SET_DYNAMIC_INDICATOR         rtas_fn_handle(RTAS_FNIDX__IBM_SET_DYNAMIC_INDICATOR)
 #define RTAS_FN_IBM_SET_EEH_OPTION                rtas_fn_handle(RTAS_FNIDX__IBM_SET_EEH_OPTION)
 #define RTAS_FN_IBM_SET_SLOT_RESET                rtas_fn_handle(RTAS_FNIDX__IBM_SET_SLOT_RESET)
@@ -217,6 +221,7 @@ typedef struct {
 #define RTAS_HARDWARE_ERROR             -1 /* Hardware or other unspecified error. */
 #define RTAS_BUSY                       -2 /* Retry immediately. */
 #define RTAS_INVALID_PARAMETER          -3 /* Invalid indicator/domain/sensor etc. */
+#define	RTAS_FUNC_NOT_SUPPORTED		-5 /* Function not supported */
 #define RTAS_UNEXPECTED_STATE_CHANGE    -7 /* Seems limited to EEH and slot reset. */
 #define RTAS_EXTENDED_DELAY_MIN       9900 /* Retry after delaying for ~1ms. */
 #define RTAS_EXTENDED_DELAY_MAX       9905 /* Retry after delaying for ~100s. */
@@ -233,6 +238,7 @@ typedef struct {
 #define RTAS_EPOW_WARNING		0x40000000 /* set bit 1 */
 #define RTAS_HOTPLUG_EVENTS		0x10000000 /* set bit 3 */
 #define RTAS_IO_EVENTS			0x08000000 /* set bit 4 */
+#define RTAS_HVPIPE_MSG_EVENTS		0x04000000 /* set bit 5 */
 #define RTAS_EVENT_SCAN_ALL_EVENTS	0xffffffff
 
 /* RTAS event severity */
@@ -282,6 +288,7 @@ typedef struct {
 #define RTAS_TYPE_DEALLOC		0xE3
 #define RTAS_TYPE_DUMP			0xE4
 #define RTAS_TYPE_HOTPLUG		0xE5
+#define RTAS_TYPE_HVPIPE		0xE6
 /* I don't add PowerMGM events right now, this is a different topic */
 #define RTAS_TYPE_PMGM_POWER_SW_ON	0x60
 #define RTAS_TYPE_PMGM_POWER_SW_OFF	0x61
@@ -374,6 +381,7 @@ inline uint32_t rtas_ext_event_company_id(struct rtas_ext_event_log_v6 *ext_log)
 #define PSERIES_ELOG_SECT_ID_HMC_ID		(('H' << 8) | 'M')
 #define PSERIES_ELOG_SECT_ID_EPOW		(('E' << 8) | 'P')
 #define PSERIES_ELOG_SECT_ID_IO_EVENT		(('I' << 8) | 'E')
+#define PSERIES_ELOG_SECT_ID_HVPIPE_EVENT	(('P' << 8) | 'E')
 #define PSERIES_ELOG_SECT_ID_MANUFACT_INFO	(('M' << 8) | 'I')
 #define PSERIES_ELOG_SECT_ID_CALL_HOME		(('C' << 8) | 'H')
 #define PSERIES_ELOG_SECT_ID_USER_DEF		(('U' << 8) | 'D')
@@ -519,6 +527,7 @@ extern struct mutex rtas_ibm_get_indices_lock;
 extern struct mutex rtas_ibm_set_dynamic_indicator_lock;
 extern struct mutex rtas_ibm_get_dynamic_sensor_state_lock;
 extern struct mutex rtas_ibm_physical_attestation_lock;
+extern struct mutex rtas_ibm_send_hvpipe_msg_lock;
 
 #define GLOBAL_INTERRUPT_QUEUE 9005
 
diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c
index e61245c4468e..8d81c1e7a8db 100644
--- a/arch/powerpc/kernel/rtas.c
+++ b/arch/powerpc/kernel/rtas.c
@@ -98,6 +98,8 @@ DEFINE_MUTEX(rtas_ibm_get_vpd_lock);
 DEFINE_MUTEX(rtas_ibm_get_indices_lock);
 DEFINE_MUTEX(rtas_ibm_set_dynamic_indicator_lock);
 DEFINE_MUTEX(rtas_ibm_get_dynamic_sensor_state_lock);
+DEFINE_MUTEX(rtas_ibm_receive_hvpipe_msg_lock);
+DEFINE_MUTEX(rtas_ibm_send_hvpipe_msg_lock);
 
 static struct rtas_function rtas_function_table[] __ro_after_init = {
 	[RTAS_FNIDX__CHECK_EXCEPTION] = {
@@ -373,6 +375,17 @@ static struct rtas_function rtas_function_table[] __ro_after_init = {
 	[RTAS_FNIDX__IBM_READ_SLOT_RESET_STATE2] = {
 		.name = "ibm,read-slot-reset-state2",
 	},
+	[RTAS_FNIDX__IBM_RECEIVE_HVPIPE_MSG] {
+		.name = "ibm,receive-hvpipe-msg",
+		.filter = &(const struct rtas_filter) {
+			.buf_idx1 = 0, .size_idx1 = 1,
+			.buf_idx2 = -1, .size_idx2 = -1,
+		},
+		/*
+		 * PAPR+ v2.13 R1–7.3.32.1
+		 */
+		.lock = &rtas_ibm_receive_hvpipe_msg_lock,
+	},
 	[RTAS_FNIDX__IBM_REMOVE_PE_DMA_WINDOW] = {
 		.name = "ibm,remove-pe-dma-window",
 	},
@@ -391,6 +404,17 @@ static struct rtas_function rtas_function_table[] __ro_after_init = {
 			.buf_idx2 = -1, .size_idx2 = -1,
 		},
 	},
+	[RTAS_FNIDX__IBM_SEND_HVPIPE_MSG] {
+		.name = "ibm,send-hvpipe-msg",
+		.filter = &(const struct rtas_filter) {
+			.buf_idx1 = 1, .size_idx1 = -1,
+			.buf_idx2 = -1, .size_idx2 = -1,
+		},
+		/*
+		 * PAPR+ v2.13 R1–7.3.32.2
+		 */
+		.lock = &rtas_ibm_send_hvpipe_msg_lock,
+	},
 	[RTAS_FNIDX__IBM_SET_DYNAMIC_INDICATOR] = {
 		.name = "ibm,set-dynamic-indicator",
 		.filter = &(const struct rtas_filter) {
diff --git a/arch/powerpc/kernel/rtasd.c b/arch/powerpc/kernel/rtasd.c
index 9bba469239fc..6336ec9aedd0 100644
--- a/arch/powerpc/kernel/rtasd.c
+++ b/arch/powerpc/kernel/rtasd.c
@@ -89,6 +89,8 @@ static char *rtas_event_type(int type)
 			return "Platform Resource Reassignment Event";
 		case RTAS_TYPE_HOTPLUG:
 			return "Hotplug Event";
+		case RTAS_TYPE_HVPIPE:
+			return "Hypervisor Pipe Notification event";
 	}
 
 	return rtas_type[0];
-- 
2.43.5