[PATCH net-next v7 01/15] ibmveth: Add MQ RX hypercall wrappers and call definitions

@@ -362,7 +362,11 @@
 #define H_GUEST_DELETE		0x488
 #define H_PKS_WRAP_OBJECT	0x490
 #define H_PKS_UNWRAP_OBJECT	0x494
-#define MAX_HCALL_OPCODE	H_PKS_UNWRAP_OBJECT
+/* 0x498 reserved; 0x4A4 = H_FREE_LOGICAL_LAN_BUFFER_QUEUE (unused here) */
+#define H_REG_LOGICAL_LAN_QUEUE 0x49C
+#define H_ADD_LOGICAL_LAN_BUFFERS_QUEUE 0x4A0
+#define H_FREE_LOGICAL_LAN_QUEUE 0x4A8
+#define MAX_HCALL_OPCODE	H_FREE_LOGICAL_LAN_QUEUE
 
 /* Scope args for H_SCM_UNBIND_ALL */
 #define H_UNBIND_SCOPE_ALL (0x1)

@@ -66,6 +66,148 @@ static inline long h_add_logical_lan_buffers(unsigned long unit_address,
 			    desc5, desc6, desc7, desc8);
 }
 
+/**
+ * h_register_logical_lan_queue - Register a subordinate receive queue
+ * @unit_address: Device unit address
+ * @buffer_list: DMA address of 4KB page for tracking registered buffers
+ * @rec_queue: Buffer descriptor of receive queue
+ * @queue_handle: Output queue handle on success (may be NULL)
+ * @irq: Output hypervisor IRQ number on success (may be NULL)
+ *
+ * Registers a subordinate receive queue with the hypervisor.
+ *
+ * Return:
+ *   H_SUCCESS (0) on success
+ *   H_PARAMETER if parameters are invalid
+ *   H_BUSY / H_LONG_BUSY_* if the resource is busy; retry
+ *   H_FUNCTION if firmware does not support this hcall
+ *
+ * On success, hypervisor returns:
+ *   R3: H_SUCCESS
+ *   R4: Queue handle
+ *   R5: IRQ number for this queue
+ */
+static inline long
+h_register_logical_lan_queue(unsigned long unit_address,
+			     unsigned long buffer_list,
+			     unsigned long rec_queue,
+			     unsigned long *queue_handle,
+			     unsigned long *irq)
+{
+	unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
+	long rc;
+
+	rc = plpar_hcall(H_REG_LOGICAL_LAN_QUEUE,
+			 retbuf, unit_address,
+			 buffer_list, rec_queue);
+
+	if (rc == H_SUCCESS) {
+		if (queue_handle)
+			*queue_handle = retbuf[0];
+		if (irq)
+			*irq = retbuf[1];
+	}
+
+	return rc;
+}
+
+/**
+ * h_add_logical_lan_buffers_queue - Add buffers to subordinate queue
+ * @unit_address: Device unit address
+ * @queue_handle: Queue handle from h_register_logical_lan_queue() or
+ *		  h_register_logical_lan_with_handle() (queue 0)
+ * @buffersznum: Buffer size (upper 32 bits) | count (lower 32 bits)
+ * @ioba12: Buffer addresses 1 and 2 packed ((addr1 << 32) | addr2)
+ * @ioba34: Buffer addresses 3 and 4 packed
+ * @ioba56: Buffer addresses 5 and 6 packed
+ * @ioba78: Buffer addresses 7 and 8 packed
+ * @ioba910: Buffer addresses 9 and 10 packed
+ * @ioba1112: Buffer addresses 11 and 12 packed
+ *
+ * Return:
+ *   H_SUCCESS - All buffers added successfully
+ *   H_PARAMETER - Invalid parameters
+ *   H_HARDWARE - Hardware error
+ *   H_FUNCTION - Firmware does not support this hcall
+ */
+static inline long h_add_logical_lan_buffers_queue(unsigned long unit_address,
+						   unsigned long queue_handle,
+						   unsigned long buffersznum,
+						   unsigned long ioba12,
+						   unsigned long ioba34,
+						   unsigned long ioba56,
+						   unsigned long ioba78,
+						   unsigned long ioba910,
+						   unsigned long ioba1112)
+{
+	unsigned long retbuf[PLPAR_HCALL9_BUFSIZE];
+
+	return plpar_hcall9(H_ADD_LOGICAL_LAN_BUFFERS_QUEUE,
+			    retbuf, unit_address,
+			    queue_handle, buffersznum,
+			    ioba12, ioba34, ioba56,
+			    ioba78, ioba910, ioba1112);
+}
+
+/**
+ * h_free_logical_lan_queue - Deregister subordinate receive queue
+ * @unit_address: Device unit address
+ * @queue_handle: Queue handle from h_register_logical_lan_queue() or
+ *		  h_register_logical_lan_with_handle() (queue 0)
+ *
+ * Deregisters and frees all structures associated with the subordinate queue.
+ *
+ * Return:
+ *   H_SUCCESS - Queue freed successfully
+ *   H_PARAMETER - Invalid parameters
+ *   H_HARDWARE - Hardware error
+ *   H_STATE - VIOA not in valid state
+ *   H_BUSY / H_LONG_BUSY_* - Resource busy, retry
+ *   H_FUNCTION - Firmware does not support this hcall
+ */
+static inline long h_free_logical_lan_queue(unsigned long unit_address,
+					    unsigned long queue_handle)
+{
+	return plpar_hcall_norets(H_FREE_LOGICAL_LAN_QUEUE,
+				  unit_address, queue_handle);
+}
+
+/**
+ * h_register_logical_lan_with_handle - Register primary queue and get handle
+ * @unit_address: Device unit address
+ * @buffer_list: DMA address of buffer list
+ * @rec_queue: Buffer descriptor of receive queue
+ * @filter_list: DMA address of filter list
+ * @mac_address: MAC address
+ * @queue_handle: Output parameter for queue handle (may be NULL)
+ *
+ * Registers the primary receive queue (queue 0) with the hypervisor and
+ * returns the queue handle. This is needed in multi-queue mode to use
+ * h_add_logical_lan_buffers_queue() for all queues including queue 0.
+ *
+ * Return: H_SUCCESS (0) on success, error code otherwise
+ */
+static inline long
+h_register_logical_lan_with_handle(unsigned long unit_address,
+				   unsigned long buffer_list,
+				   unsigned long rec_queue,
+				   unsigned long filter_list,
+				   unsigned long mac_address,
+				   unsigned long *queue_handle)
+{
+	unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
+	long rc;
+
+	rc = plpar_hcall(H_REGISTER_LOGICAL_LAN, retbuf,
+			 unit_address, buffer_list, rec_queue,
+			 filter_list, mac_address);
+
+	if (rc == H_SUCCESS && queue_handle)
+		*queue_handle = retbuf[0];
+
+	return rc;
+}
+
 /* FW allows us to send 6 descriptors but we only use one so mark
  * the other 5 as unused (0)
  */

@@ -217,6 +217,10 @@ hcall_table = {
 	# Key wrapping hcalls
 	1168: 'H_PKS_WRAP_OBJECT',
 	1172: 'H_PKS_UNWRAP_OBJECT',
+	# Logical LAN multi-queue RX (PAPR 11.20.00)
+	1180: 'H_REG_LOGICAL_LAN_QUEUE',
+	1184: 'H_ADD_LOGICAL_LAN_BUFFERS_QUEUE',
+	1192: 'H_FREE_LOGICAL_LAN_QUEUE',
 	# Platform-specific hcalls used by the Ultravisor
 	61184: 'H_SVM_PAGE_IN',
 	61188: 'H_SVM_PAGE_OUT',