[dpdk-dev] [PATCH v7 3/4] ena: Amazon ENA communication layer for DPDK platform

[Jan Medala <jan@semihalf.com>]

Implementation of platform specific code for ENA communication layer.

Signed-off-by: Evgeny Schemeilin <evgenys@amazon.com>
Signed-off-by: Jan Medala <jan@semihalf.com>
Signed-off-by: Jakub Palider <jpa@semihalf.com>
---
 drivers/net/ena/base/ena_plat_dpdk.h | 217 +++++++++++++++++++++++++++++++++++
 1 file changed, 217 insertions(+)
 create mode 100644 drivers/net/ena/base/ena_plat_dpdk.h

diff --git a/drivers/net/ena/base/ena_plat_dpdk.h b/drivers/net/ena/base/ena_plat_dpdk.h
new file mode 100644
index 0000000..3ddc5c2
--- /dev/null
+++ b/drivers/net/ena/base/ena_plat_dpdk.h
@@ -0,0 +1,217 @@
+/*-
+* BSD LICENSE
+*
+* Copyright (c) 2015-2016 Amazon.com, Inc. or its affiliates.
+* 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 copyright holder 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 DPDK_ENA_COM_ENA_PLAT_DPDK_H_
+#define DPDK_ENA_COM_ENA_PLAT_DPDK_H_
+
+#include <stdbool.h>
+#include <stdlib.h>
+#include <pthread.h>
+#include <stdint.h>
+#include <string.h>
+#include <errno.h>
+
+#include <rte_atomic.h>
+#include <rte_branch_prediction.h>
+#include <rte_cycles.h>
+#include <rte_log.h>
+#include <rte_malloc.h>
+#include <rte_memzone.h>
+#include <rte_spinlock.h>
+
+#include <sys/time.h>
+
+typedef uint64_t u64;
+typedef uint32_t u32;
+typedef uint16_t u16;
+typedef uint8_t u8;
+
+typedef uint64_t dma_addr_t;
+
+#define ena_atomic32_t rte_atomic32_t
+#define ena_mem_handle_t void *
+
+#define SZ_256 (256)
+#define SZ_4K (4096)
+
+#define ENA_COM_OK	0
+#define ENA_COM_NO_MEM	-ENOMEM
+#define ENA_COM_INVAL	-EINVAL
+#define ENA_COM_NO_SPACE	-ENOSPC
+#define ENA_COM_NO_DEVICE	-ENODEV
+#define ENA_COM_PERMISSION	-EPERM
+#define ENA_COM_TIMER_EXPIRED	-ETIME
+#define ENA_COM_FAULT	-EFAULT
+
+#define ____cacheline_aligned __rte_cache_aligned
+
+#define ENA_ABORT() abort()
+
+#define ENA_MSLEEP(x) rte_delay_ms(x)
+#define ENA_UDELAY(x) rte_delay_us(x)
+
+#define memcpy_toio memcpy
+#define wmb rte_wmb
+#define rmb rte_wmb
+#define mb rte_mb
+#define __iomem
+
+#define US_PER_S 1000000
+#define ENA_GET_SYSTEM_USECS()						\
+	(rte_get_timer_cycles() * US_PER_S / rte_get_timer_hz())
+
+#define ENA_ASSERT(cond, format, arg...)				\
+	do {								\
+		if (unlikely(!(cond))) {				\
+			printf("Assertion failed on %s:%s:%d: " format,	\
+			__FILE__, __func__, __LINE__, ##arg);		\
+			rte_exit(EXIT_FAILURE, "ASSERTION FAILED\n");	\
+		}							\
+	} while (0)
+
+#define ENA_MAX32(x, y) RTE_MAX((x), (y))
+#define ENA_MAX16(x, y) RTE_MAX((x), (y))
+#define ENA_MAX8(x, y) RTE_MAX((x), (y))
+#define ENA_MIN32(x, y) RTE_MIN((x), (y))
+#define ENA_MIN16(x, y) RTE_MIN((x), (y))
+#define ENA_MIN8(x, y) RTE_MIN((x), (y))
+
+#define U64_C(x) x ## ULL
+#define BIT(nr)         (1UL << (nr))
+#define BITS_PER_LONG	(__SIZEOF_LONG__ * 8)
+#define GENMASK(h, l)	(((~0UL) << (l)) & (~0UL >> (BITS_PER_LONG - 1 - (h))))
+#define GENMASK_ULL(h, l) (((U64_C(1) << ((h) - (l) + 1)) - 1) << (l))
+
+#ifdef RTE_LIBRTE_ENA_COM_DEBUG
+#define ena_trc_dbg(format, arg...)					\
+	RTE_LOG(DEBUG, PMD, "[ENA_COM: %s] " format, __func__, ##arg)
+#define ena_trc_info(format, arg...)					\
+	RTE_LOG(INFO, PMD, "[ENA_COM: %s] " format, __func__, ##arg)
+#define ena_trc_warn(format, arg...)					\
+	RTE_LOG(ERR, PMD, "[ENA_COM: %s] " format, __func__, ##arg)
+#define ena_trc_err(format, arg...)					\
+	RTE_LOG(ERR, PMD, "[ENA_COM: %s] " format, __func__, ##arg)
+#else
+#define ena_trc_dbg(format, arg...) do { } while (0)
+#define ena_trc_info(format, arg...) do { } while (0)
+#define ena_trc_warn(format, arg...) do { } while (0)
+#define ena_trc_err(format, arg...) do { } while (0)
+#endif /* RTE_LIBRTE_ENA_COM_DEBUG */
+
+/* Spinlock related methods */
+#define ena_spinlock_t rte_spinlock_t
+#define ENA_SPINLOCK_INIT(spinlock) rte_spinlock_init(&spinlock)
+#define ENA_SPINLOCK_LOCK(spinlock, flags)				\
+	({(void)flags; rte_spinlock_lock(&spinlock); })
+#define ENA_SPINLOCK_UNLOCK(spinlock, flags)				\
+	({(void)flags; rte_spinlock_unlock(&(spinlock)); })
+
+#define q_waitqueue_t			\
+	struct {			\
+		pthread_cond_t cond;	\
+		pthread_mutex_t mutex;	\
+	}
+
+#define ena_wait_queue_t q_waitqueue_t
+
+#define ENA_WAIT_EVENT_INIT(waitqueue)					\
+	do {								\
+		pthread_mutex_init(&(waitqueue).mutex, NULL);		\
+		pthread_cond_init(&(waitqueue).cond, NULL);		\
+	} while (0)
+
+#define ENA_WAIT_EVENT_WAIT(waitevent, timeout)				\
+	do {								\
+		struct timespec wait;					\
+		struct timeval now;					\
+		unsigned long timeout_us;				\
+		gettimeofday(&now, NULL);				\
+		wait.tv_sec = now.tv_sec + timeout / 1000000UL;		\
+		timeout_us = timeout % 1000000UL;			\
+		wait.tv_nsec = (now.tv_usec + timeout_us) * 1000UL;	\
+		pthread_mutex_lock(&waitevent.mutex);			\
+		pthread_cond_timedwait(&waitevent.cond,			\
+				&waitevent.mutex, &wait);		\
+		pthread_mutex_unlock(&waitevent.mutex);			\
+	} while (0)
+#define ENA_WAIT_EVENT_SIGNAL(waitevent) pthread_cond_signal(&waitevent.cond)
+/* pthread condition doesn't need to be rearmed after usage */
+#define ENA_WAIT_EVENT_CLEAR(...)
+
+#define ena_wait_event_t ena_wait_queue_t
+#define ENA_MIGHT_SLEEP()
+
+#define ENA_MEM_ALLOC_COHERENT(dmadev, size, virt, phys, handle)	\
+	do {								\
+		const struct rte_memzone *mz;				\
+		char z_name[RTE_MEMZONE_NAMESIZE];			\
+		(void)dmadev; (void)handle;				\
+		snprintf(z_name, sizeof(z_name),			\
+				"ena_alloc_%d", ena_alloc_cnt++);	\
+		mz = rte_memzone_reserve(z_name, size, SOCKET_ID_ANY, 0); \
+		virt = mz->addr;					\
+		phys = mz->phys_addr;					\
+	} while (0)
+#define ENA_MEM_FREE_COHERENT(dmadev, size, virt, phys, handle) 	\
+	({(void)size; rte_free(virt); })
+#define ENA_MEM_ALLOC(dmadev, size) rte_zmalloc(NULL, size, 1)
+#define ENA_MEM_FREE(dmadev, ptr) ({(void)dmadev; rte_free(ptr); })
+
+static inline void writel(u32 value, volatile void  *addr)
+{
+	*(volatile u32 *)addr = value;
+}
+
+static inline u32 readl(const volatile void *addr)
+{
+	return *(const volatile u32 *)addr;
+}
+
+#define ENA_REG_WRITE32(value, reg) writel((value), (reg))
+#define ENA_REG_READ32(reg) readl((reg))
+
+#define ATOMIC32_INC(i32_ptr) rte_atomic32_inc(i32_ptr)
+#define ATOMIC32_DEC(i32_ptr) rte_atomic32_dec(i32_ptr)
+#define ATOMIC32_SET(i32_ptr, val) rte_atomic32_set(i32_ptr, val)
+#define ATOMIC32_READ(i32_ptr) rte_atomic32_read(i32_ptr)
+
+#define msleep(x) rte_delay_us(x * 1000)
+#define udelay(x) rte_delay_us(x)
+
+#define MAX_ERRNO       4095
+#define IS_ERR(x) (((unsigned long)x) >= (unsigned long)-MAX_ERRNO)
+#define ERR_PTR(error) ((void *)(long)error)
+#define PTR_ERR(error) ((long)(void *)error)
+#define might_sleep()
+
+#endif /* DPDK_ENA_COM_ENA_PLAT_DPDK_H_ */
-- 
1.9.1