--- /dev/null
+/*-
+ * BSD LICENSE
+ *
+ * Copyright (c) 2017 CESNET
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * 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.
+ * * Neither the name of CESNET nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * 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 _SZEDATA2_IOBUF_H_
+#define _SZEDATA2_IOBUF_H_
+
+#include <stdint.h>
+#include <stdbool.h>
+
+#include <rte_byteorder.h>
+#include <rte_io.h>
+#include <rte_dev.h>
+
+/* IBUF offsets from the beginning of the PCI resource address space. */
+extern const uint32_t szedata2_ibuf_base_table[];
+extern const uint32_t szedata2_ibuf_count;
+
+/* OBUF offsets from the beginning of the PCI resource address space. */
+extern const uint32_t szedata2_obuf_base_table[];
+extern const uint32_t szedata2_obuf_count;
+
+enum szedata2_link_speed {
+ SZEDATA2_LINK_SPEED_DEFAULT = 0,
+ SZEDATA2_LINK_SPEED_10G,
+ SZEDATA2_LINK_SPEED_40G,
+ SZEDATA2_LINK_SPEED_100G,
+};
+
+enum szedata2_mac_check_mode {
+ SZEDATA2_MAC_CHMODE_PROMISC = 0x0,
+ SZEDATA2_MAC_CHMODE_ONLY_VALID = 0x1,
+ SZEDATA2_MAC_CHMODE_ALL_BROADCAST = 0x2,
+ SZEDATA2_MAC_CHMODE_ALL_MULTICAST = 0x3,
+};
+
+/**
+ * Macro takes pointer to pci resource structure (rsc)
+ * and returns pointer to mapped resource memory at
+ * specified offset (offset) typecast to the type (type).
+ */
+#define SZEDATA2_PCI_RESOURCE_PTR(rsc, offset, type) \
+ ((type)(((uint8_t *)(rsc)->addr) + (offset)))
+
+/**
+ * Maximum possible number of MAC addresses (limited by IBUF status
+ * register value MAC_COUNT which has 5 bits).
+ */
+#define SZEDATA2_IBUF_MAX_MAC_COUNT 32
+
+/**
+ * Structure describes IBUF address space.
+ */
+struct szedata2_ibuf {
+ /** Total Received Frames Counter low part */
+ uint32_t trfcl; /**< 0x00 */
+ /** Correct Frames Counter low part */
+ uint32_t cfcl; /**< 0x04 */
+ /** Discarded Frames Counter low part */
+ uint32_t dfcl; /**< 0x08 */
+ /** Counter of frames discarded due to buffer overflow low part */
+ uint32_t bodfcl; /**< 0x0C */
+ /** Total Received Frames Counter high part */
+ uint32_t trfch; /**< 0x10 */
+ /** Correct Frames Counter high part */
+ uint32_t cfch; /**< 0x14 */
+ /** Discarded Frames Counter high part */
+ uint32_t dfch; /**< 0x18 */
+ /** Counter of frames discarded due to buffer overflow high part */
+ uint32_t bodfch; /**< 0x1C */
+ /** IBUF enable register */
+ uint32_t ibuf_en; /**< 0x20 */
+ /** Error mask register */
+ uint32_t err_mask; /**< 0x24 */
+ /** IBUF status register */
+ uint32_t ibuf_st; /**< 0x28 */
+ /** IBUF command register */
+ uint32_t ibuf_cmd; /**< 0x2C */
+ /** Minimum frame length allowed */
+ uint32_t mfla; /**< 0x30 */
+ /** Frame MTU */
+ uint32_t mtu; /**< 0x34 */
+ /** MAC address check mode */
+ uint32_t mac_chmode; /**< 0x38 */
+ /** Octets Received OK Counter low part */
+ uint32_t orocl; /**< 0x3C */
+ /** Octets Received OK Counter high part */
+ uint32_t oroch; /**< 0x40 */
+ /** reserved */
+ uint8_t reserved[60]; /**< 0x4C */
+ /** IBUF memory for MAC addresses */
+ uint32_t mac_mem[2 * SZEDATA2_IBUF_MAX_MAC_COUNT]; /**< 0x80 */
+} __rte_packed;
+
+/**
+ * Structure describes OBUF address space.
+ */
+struct szedata2_obuf {
+ /** Total Sent Frames Counter low part */
+ uint32_t tsfcl; /**< 0x00 */
+ /** Octets Sent Counter low part */
+ uint32_t oscl; /**< 0x04 */
+ /** Total Discarded Frames Counter low part */
+ uint32_t tdfcl; /**< 0x08 */
+ /** reserved */
+ uint32_t reserved1; /**< 0x0C */
+ /** Total Sent Frames Counter high part */
+ uint32_t tsfch; /**< 0x10 */
+ /** Octets Sent Counter high part */
+ uint32_t osch; /**< 0x14 */
+ /** Total Discarded Frames Counter high part */
+ uint32_t tdfch; /**< 0x18 */
+ /** reserved */
+ uint32_t reserved2; /**< 0x1C */
+ /** OBUF enable register */
+ uint32_t obuf_en; /**< 0x20 */
+ /** reserved */
+ uint64_t reserved3; /**< 0x24 */
+ /** OBUF control register */
+ uint32_t ctrl; /**< 0x2C */
+ /** OBUF status register */
+ uint32_t obuf_st; /**< 0x30 */
+} __rte_packed;
+
+/**
+ * Wrapper for reading 4 bytes from device memory in correct endianness.
+ *
+ * @param addr
+ * Address for reading.
+ * @return
+ * 4 B value.
+ */
+static inline uint32_t
+szedata2_read32(const volatile void *addr)
+{
+ return rte_le_to_cpu_32(rte_read32(addr));
+}
+
+/**
+ * Wrapper for writing 4 bytes to device memory in correct endianness.
+ *
+ * @param value
+ * Value to write.
+ * @param addr
+ * Address for writing.
+ */
+static inline void
+szedata2_write32(uint32_t value, volatile void *addr)
+{
+ rte_write32(rte_cpu_to_le_32(value), addr);
+}
+
+/**
+ * Get pointer to IBUF structure according to specified index.
+ *
+ * @param rsc
+ * Pointer to base address of memory resource.
+ * @param index
+ * Index of IBUF.
+ * @return
+ * Pointer to IBUF structure.
+ */
+static inline struct szedata2_ibuf *
+ibuf_ptr_by_index(struct rte_mem_resource *rsc, uint32_t index)
+{
+ if (index >= szedata2_ibuf_count)
+ index = szedata2_ibuf_count - 1;
+ return SZEDATA2_PCI_RESOURCE_PTR(rsc, szedata2_ibuf_base_table[index],
+ struct szedata2_ibuf *);
+}
+
+/**
+ * Get pointer to OBUF structure according to specified idnex.
+ *
+ * @param rsc
+ * Pointer to base address of memory resource.
+ * @param index
+ * Index of OBUF.
+ * @return
+ * Pointer to OBUF structure.
+ */
+static inline struct szedata2_obuf *
+obuf_ptr_by_index(struct rte_mem_resource *rsc, uint32_t index)
+{
+ if (index >= szedata2_obuf_count)
+ index = szedata2_obuf_count - 1;
+ return SZEDATA2_PCI_RESOURCE_PTR(rsc, szedata2_obuf_base_table[index],
+ struct szedata2_obuf *);
+}
+
+/**
+ * Checks if IBUF is enabled.
+ *
+ * @param ibuf
+ * Pointer to IBUF structure.
+ * @return
+ * true if IBUF is enabled.
+ * false if IBUF is disabled.
+ */
+static inline bool
+ibuf_is_enabled(const volatile struct szedata2_ibuf *ibuf)
+{
+ return ((szedata2_read32(&ibuf->ibuf_en) & 0x1) != 0) ? true : false;
+}
+
+/**
+ * Enables IBUF.
+ *
+ * @param ibuf
+ * Pointer to IBUF structure.
+ */
+static inline void
+ibuf_enable(volatile struct szedata2_ibuf *ibuf)
+{
+ szedata2_write32(szedata2_read32(&ibuf->ibuf_en) | 0x1, &ibuf->ibuf_en);
+}
+
+/**
+ * Disables IBUF.
+ *
+ * @param ibuf
+ * Pointer to IBUF structure.
+ */
+static inline void
+ibuf_disable(volatile struct szedata2_ibuf *ibuf)
+{
+ szedata2_write32(szedata2_read32(&ibuf->ibuf_en) & ~0x1,
+ &ibuf->ibuf_en);
+}
+
+/**
+ * Checks if link is up.
+ *
+ * @param ibuf
+ * Pointer to IBUF structure.
+ * @return
+ * true if ibuf link is up.
+ * false if ibuf link is down.
+ */
+static inline bool
+ibuf_is_link_up(const volatile struct szedata2_ibuf *ibuf)
+{
+ return ((szedata2_read32(&ibuf->ibuf_st) & 0x80) != 0) ? true : false;
+}
+
+/**
+ * Get current MAC address check mode from IBUF.
+ *
+ * @param ibuf
+ * Pointer to IBUF structure.
+ * @return
+ * MAC address check mode constant.
+ */
+static inline enum szedata2_mac_check_mode
+ibuf_mac_mode_read(const volatile struct szedata2_ibuf *ibuf)
+{
+ switch (szedata2_read32(&ibuf->mac_chmode) & 0x3) {
+ case 0x0:
+ return SZEDATA2_MAC_CHMODE_PROMISC;
+ case 0x1:
+ return SZEDATA2_MAC_CHMODE_ONLY_VALID;
+ case 0x2:
+ return SZEDATA2_MAC_CHMODE_ALL_BROADCAST;
+ case 0x3:
+ return SZEDATA2_MAC_CHMODE_ALL_MULTICAST;
+ default:
+ return SZEDATA2_MAC_CHMODE_PROMISC;
+ }
+}
+
+/**
+ * Writes mode in MAC address check mode register in IBUF.
+ *
+ * @param ibuf
+ * Pointer to IBUF structure.
+ * @param mode
+ * MAC address check mode to set.
+ */
+static inline void
+ibuf_mac_mode_write(volatile struct szedata2_ibuf *ibuf,
+ enum szedata2_mac_check_mode mode)
+{
+ szedata2_write32((szedata2_read32(&ibuf->mac_chmode) & ~0x3) | mode,
+ &ibuf->mac_chmode);
+}
+
+/**
+ * Checks if obuf is enabled.
+ *
+ * @param obuf
+ * Pointer to OBUF structure.
+ * @return
+ * true if OBUF is enabled.
+ * false if OBUF is disabled.
+ */
+static inline bool
+obuf_is_enabled(const volatile struct szedata2_obuf *obuf)
+{
+ return ((szedata2_read32(&obuf->obuf_en) & 0x1) != 0) ? true : false;
+}
+
+/**
+ * Enables OBUF.
+ *
+ * @param obuf
+ * Pointer to OBUF structure.
+ */
+static inline void
+obuf_enable(volatile struct szedata2_obuf *obuf)
+{
+ szedata2_write32(szedata2_read32(&obuf->obuf_en) | 0x1, &obuf->obuf_en);
+}
+
+/**
+ * Disables OBUF.
+ *
+ * @param obuf
+ * Pointer to OBUF structure.
+ */
+static inline void
+obuf_disable(volatile struct szedata2_obuf *obuf)
+{
+ szedata2_write32(szedata2_read32(&obuf->obuf_en) & ~0x1,
+ &obuf->obuf_en);
+}
+
+#endif /* _SZEDATA2_IOBUF_H_ */
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