[dpdk-dev] [PATCH v5 07/38] bnxt: declare generic ring structs and free() func

[Stephen Hurd]

From: Ajit Khaparde <ajit.khaparde at broadcom.com>

Declare generic ring structures and a free() function. These are
generic ring mamagement functions which will be used to create Tx,
Rx and Completion rings in the subsequent patches, and tie them to
the HWRM managed ring resources.

This generic ring structure is shared all the ring types and tracks
the the host Buffer Descriptors (BDs) and the HWRM assigned ID.

Signed-off-by: Ajit Khaparde <ajit.khaparde at broadcom.com>
Signed-off-by: Stephen Hurd <stephen.hurd at broadcom.com>
Reviewed-by: David Christensen <david.christensen at broadcom.com>

--
v4:
Address checkpatch warnings.

v5:
Reorder footer
---
 drivers/net/bnxt/Makefile    |  1 +
 drivers/net/bnxt/bnxt_ring.c | 47 ++++++++++++++++++++++
 drivers/net/bnxt/bnxt_ring.h | 92 ++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 140 insertions(+)
 create mode 100644 drivers/net/bnxt/bnxt_ring.c
 create mode 100644 drivers/net/bnxt/bnxt_ring.h

diff --git a/drivers/net/bnxt/Makefile b/drivers/net/bnxt/Makefile
index c57afaa..757ea62 100644
--- a/drivers/net/bnxt/Makefile
+++ b/drivers/net/bnxt/Makefile
@@ -50,6 +50,7 @@ EXPORT_MAP := rte_pmd_bnxt_version.map
 #
 SRCS-$(CONFIG_RTE_LIBRTE_BNXT_PMD) += bnxt_ethdev.c
 SRCS-$(CONFIG_RTE_LIBRTE_BNXT_PMD) += bnxt_hwrm.c
+SRCS-$(CONFIG_RTE_LIBRTE_BNXT_PMD) += bnxt_ring.c
 SRCS-$(CONFIG_RTE_LIBRTE_BNXT_PMD) += bnxt_vnic.c
 
 #
diff --git a/drivers/net/bnxt/bnxt_ring.c b/drivers/net/bnxt/bnxt_ring.c
new file mode 100644
index 0000000..b57d3ba
--- /dev/null
+++ b/drivers/net/bnxt/bnxt_ring.c
@@ -0,0 +1,47 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) Broadcom Limited.
+ *   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 Broadcom Corporation 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.
+ */
+
+#include "bnxt.h"
+#include "bnxt_ring.h"
+
+/*
+ * Generic ring handling
+ */
+
+void bnxt_free_ring(struct bnxt_ring *ring)
+{
+	if (ring->vmem_size && *ring->vmem) {
+		memset((char *)*ring->vmem, 0, ring->vmem_size);
+		*ring->vmem = NULL;
+	}
+}
diff --git a/drivers/net/bnxt/bnxt_ring.h b/drivers/net/bnxt/bnxt_ring.h
new file mode 100644
index 0000000..3abfb04
--- /dev/null
+++ b/drivers/net/bnxt/bnxt_ring.h
@@ -0,0 +1,92 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) Broadcom Limited.
+ *   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 Broadcom Corporation 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 _BNXT_RING_H_
+#define _BNXT_RING_H_
+
+#include <inttypes.h>
+
+#include <rte_memory.h>
+
+#define RING_NEXT(ring, idx)		(((idx) + 1) & (ring)->ring_mask)
+
+#define RTE_MBUF_DATA_DMA_ADDR(mb) \
+	((uint64_t)((mb)->buf_physaddr + (mb)->data_off))
+
+#define DB_IDX_MASK						0xffffff
+#define DB_IDX_VALID						(0x1 << 26)
+#define DB_IRQ_DIS						(0x1 << 27)
+#define DB_KEY_TX						(0x0 << 28)
+#define DB_KEY_RX						(0x1 << 28)
+#define DB_KEY_CP						(0x2 << 28)
+#define DB_KEY_ST						(0x3 << 28)
+#define DB_KEY_TX_PUSH						(0x4 << 28)
+#define DB_LONG_TX_PUSH						(0x2 << 24)
+
+#define DEFAULT_CP_RING_SIZE	256
+#define DEFAULT_RX_RING_SIZE	256
+#define DEFAULT_TX_RING_SIZE	256
+
+#define MAX_TPA		128
+
+/* These assume 4k pages */
+#define MAX_RX_DESC_CNT (8 * 1024)
+#define MAX_TX_DESC_CNT (4 * 1024)
+#define MAX_CP_DESC_CNT (16 * 1024)
+
+#define INVALID_HW_RING_ID      ((uint16_t)-1)
+
+struct bnxt_ring {
+	void			*bd;
+	phys_addr_t		bd_dma;
+	uint32_t		ring_size;
+	uint32_t		ring_mask;
+
+	int			vmem_size;
+	void			**vmem;
+
+	uint16_t		fw_ring_id; /* Ring id filled by Chimp FW */
+};
+
+struct bnxt_ring_grp_info {
+	uint16_t	fw_stats_ctx;
+	uint16_t	fw_grp_id;
+	uint16_t	rx_fw_ring_id;
+	uint16_t	cp_fw_ring_id;
+	uint16_t	ag_fw_ring_id;
+};
+
+struct bnxt;
+void bnxt_free_ring(struct bnxt_ring *ring);
+
+#endif
-- 
1.9.1