Imported Upstream version 17.05

Change-Id: Id1e419c5a214e4a18739663b91f0f9a549f1fdc6
Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>

1 files changed, 125 insertions, 0 deletions

diff --git a/drivers/net/sfc/sfc_dp.h b/drivers/net/sfc/sfc_dp.h
new file mode 100644
index 00000000..eff0aa87
--- /dev/null
+++ b/drivers/net/sfc/sfc_dp.h
@@ -0,0 +1,125 @@
+/*-
+ *   BSD LICENSE
+ *
+ * Copyright (c) 2017 Solarflare Communications Inc.
+ * All rights reserved.
+ *
+ * This software was jointly developed between OKTET Labs (under contract
+ * for Solarflare) and Solarflare Communications, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _SFC_DP_H
+#define _SFC_DP_H
+
+#include <stdbool.h>
+#include <sys/queue.h>
+
+#include <rte_pci.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define SFC_DIV_ROUND_UP(a, b) \
+	__extension__ ({		\
+		typeof(a) _a = (a);	\
+		typeof(b) _b = (b);	\
+					\
+		(_a + (_b - 1)) / _b;	\
+	})
+
+/**
+ * Datapath exception handler to be provided by the control path.
+ */
+typedef void (sfc_dp_exception_t)(void *ctrl);
+
+enum sfc_dp_type {
+	SFC_DP_RX = 0,	/**< Receive datapath */
+	SFC_DP_TX,	/**< Transmit datapath */
+};
+
+
+/** Datapath queue run-time information */
+struct sfc_dp_queue {
+	uint16_t			port_id;
+	uint16_t			queue_id;
+	struct rte_pci_addr		pci_addr;
+};
+
+void sfc_dp_queue_init(struct sfc_dp_queue *dpq,
+		       uint16_t port_id, uint16_t queue_id,
+		       const struct rte_pci_addr *pci_addr);
+
+/*
+ * Helper macro to define datapath logging macros and have uniform
+ * logging.
+ */
+#define SFC_DP_LOG(dp_name, level, dpq, ...) \
+	do {								\
+		const struct sfc_dp_queue *_dpq = (dpq);		\
+		const struct rte_pci_addr *_addr = &(_dpq)->pci_addr;	\
+									\
+		RTE_LOG(level, PMD,					\
+			RTE_FMT("%s " PCI_PRI_FMT			\
+				" #%" PRIu16 ".%" PRIu16 ": "		\
+				RTE_FMT_HEAD(__VA_ARGS__,) "\n",	\
+				dp_name,				\
+				_addr->domain, _addr->bus,		\
+				_addr->devid, _addr->function,		\
+				_dpq->port_id, _dpq->queue_id,		\
+				RTE_FMT_TAIL(__VA_ARGS__,)));		\
+	} while (0)
+
+
+/** Datapath definition */
+struct sfc_dp {
+	TAILQ_ENTRY(sfc_dp)		links;
+	const char			*name;
+	enum sfc_dp_type		type;
+	/* Mask of required hardware/firmware capabilities */
+	unsigned int			hw_fw_caps;
+#define SFC_DP_HW_FW_CAP_EF10		0x1
+};
+
+/** List of datapath variants */
+TAILQ_HEAD(sfc_dp_list, sfc_dp);
+
+/* Check if available HW/FW capabilities are sufficient for the datapath */
+static inline bool
+sfc_dp_match_hw_fw_caps(const struct sfc_dp *dp, unsigned int avail_caps)
+{
+	return (dp->hw_fw_caps & avail_caps) == dp->hw_fw_caps;
+}
+
+struct sfc_dp *sfc_dp_find_by_name(struct sfc_dp_list *head,
+				   enum sfc_dp_type type, const char *name);
+struct sfc_dp *sfc_dp_find_by_caps(struct sfc_dp_list *head,
+				   enum sfc_dp_type type,
+				   unsigned int avail_caps);
+int sfc_dp_register(struct sfc_dp_list *head, struct sfc_dp *entry);
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* _SFC_DP_H */