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freebsd/sys/contrib/ena-com/ena_plat.h
Marcin Wojtas d17b7d87ee Introduce NETMAP support in ENA 
Mock implementation of NETMAP routines is located in ena_netmap.c/.h
files. All code is protected under the DEV_NETMAP macro. Makefile was
updated with files and flag.

As ENA driver provide own implementations of (un)likely it must be
undefined before including NETMAP headers.

ena_netmap_attach function is called on the end of NIC attach. It fills
structure with NIC configuration and callbacks. Then provides it to
netmap_attach. Similarly netmap_detach is called during ena_detach.

Three callbacks are used.
nm_register is implemented by ena_netmap_reg. It is called when user
space application open or close NIC in NETMAP mode. Current action is
recognized based on onoff parameter: true means on and false off. As
NICs rings need to be reconfigured ena_down and ena_up are reused.
When user space application wants to receive new packets from NIC
nm_rxsync is called, and when there are new packets ready for Tx
nm_txsync is called.

Differential Revision: https://reviews.freebsd.org/D21934
Submitted by: Rafal Kozik <rk@semihalf.com>
              Michal Krawczyk <mk@semihalf.com>
Obtained from: Semihalf
Sponsored by:  Amazon, Inc.
2019-10-31 15:51:18 +00:00

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/*-
* BSD LICENSE
*
* Copyright (c) 2015-2019 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 ENA_PLAT_H_
#define ENA_PLAT_H_
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/condvar.h>
#include <sys/endian.h>
#include <sys/kernel.h>
#include <sys/kthread.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/module.h>
#include <sys/rman.h>
#include <sys/proc.h>
#include <sys/smp.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/sysctl.h>
#include <sys/taskqueue.h>
#include <sys/eventhandler.h>
#include <sys/types.h>
#include <sys/timetc.h>
#include <sys/cdefs.h>
#include <machine/atomic.h>
#include <machine/bus.h>
#include <machine/in_cksum.h>
#include <machine/pcpu.h>
#include <machine/resource.h>
#include <net/bpf.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/if_arp.h>
#include <net/if_dl.h>
#include <net/if_media.h>
#include <net/if_types.h>
#include <net/if_vlan_var.h>
#include <netinet/in_systm.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>
#include <netinet/ip.h>
#include <netinet/ip6.h>
#include <netinet/tcp.h>
#include <netinet/tcp_lro.h>
#include <netinet/udp.h>
#include <dev/led/led.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
extern struct ena_bus_space ebs;
/* Levels */
#define ENA_ALERT (1 << 0) /* Alerts are providing more error info. */
#define ENA_WARNING (1 << 1) /* Driver output is more error sensitive. */
#define ENA_INFO (1 << 2) /* Provides additional driver info. */
#define ENA_DBG (1 << 3) /* Driver output for debugging. */
/* Detailed info that will be printed with ENA_INFO or ENA_DEBUG flag. */
#define ENA_TXPTH (1 << 4) /* Allows TX path tracing. */
#define ENA_RXPTH (1 << 5) /* Allows RX path tracing. */
#define ENA_RSC (1 << 6) /* Goes with TXPTH or RXPTH, free/alloc res. */
#define ENA_IOQ (1 << 7) /* Detailed info about IO queues. */
#define ENA_ADMQ (1 << 8) /* Detailed info about admin queue. */
#define ENA_NETMAP (1 << 9) /* Detailed info about netmap. */
extern int ena_log_level;
#define ena_trace_raw(level, fmt, args...) \
do { \
if (((level) & ena_log_level) != (level)) \
break; \
printf(fmt, ##args); \
} while (0)
#define ena_trace(level, fmt, args...) \
ena_trace_raw(level, "%s() [TID:%d]: " \
fmt, __func__, curthread->td_tid, ##args)
#define ena_trc_dbg(format, arg...) ena_trace(ENA_DBG, format, ##arg)
#define ena_trc_info(format, arg...) ena_trace(ENA_INFO, format, ##arg)
#define ena_trc_warn(format, arg...) ena_trace(ENA_WARNING, format, ##arg)
#define ena_trc_err(format, arg...) ena_trace(ENA_ALERT, format, ##arg)
#define unlikely(x) __predict_false(x)
#define likely(x) __predict_true(x)
#define __iomem
#define ____cacheline_aligned __aligned(CACHE_LINE_SIZE)
#define MAX_ERRNO 4095
#define IS_ERR_VALUE(x) unlikely((x) <= (unsigned long)MAX_ERRNO)
#define ENA_ASSERT(cond, format, arg...) \
do { \
if (unlikely(!(cond))) { \
ena_trc_err( \
"Assert failed on %s:%s:%d:" format, \
__FILE__, __func__, __LINE__, ##arg); \
} \
} while (0)
#define ENA_WARN(cond, format, arg...) \
do { \
if (unlikely((cond))) { \
ena_trc_warn(format, ##arg); \
} \
} while (0)
static inline long IS_ERR(const void *ptr)
{
return IS_ERR_VALUE((unsigned long)ptr);
}
static inline void *ERR_PTR(long error)
{
return (void *)error;
}
static inline long PTR_ERR(const void *ptr)
{
return (long) ptr;
}
#define GENMASK(h, l) (((~0U) - (1U << (l)) + 1) & (~0U >> (32 - 1 - (h))))
#define GENMASK_ULL(h, l) (((~0ULL) << (l)) & (~0ULL >> (64 - 1 - (h))))
#define BIT(x) (1UL << (x))
#define ENA_ABORT() BUG()
#define BUG() panic("ENA BUG")
#define SZ_256 (256)
#define SZ_4K (4096)
#define ENA_COM_OK 0
#define ENA_COM_FAULT EFAULT
#define ENA_COM_INVAL EINVAL
#define ENA_COM_NO_MEM ENOMEM
#define ENA_COM_NO_SPACE ENOSPC
#define ENA_COM_TRY_AGAIN -1
#define ENA_COM_UNSUPPORTED EOPNOTSUPP
#define ENA_COM_NO_DEVICE ENODEV
#define ENA_COM_PERMISSION EPERM
#define ENA_COM_TIMER_EXPIRED ETIMEDOUT
#define ENA_MSLEEP(x) pause_sbt("ena", SBT_1MS * (x), SBT_1MS, 0)
#define ENA_UDELAY(x) DELAY(x)
#define ENA_GET_SYSTEM_TIMEOUT(timeout_us) \
((long)cputick2usec(cpu_ticks()) + (timeout_us))
#define ENA_TIME_EXPIRE(timeout) ((timeout) < (long)cputick2usec(cpu_ticks()))
#define ENA_MIGHT_SLEEP()
#define min_t(type, _x, _y) ((type)(_x) < (type)(_y) ? (type)(_x) : (type)(_y))
#define max_t(type, _x, _y) ((type)(_x) > (type)(_y) ? (type)(_x) : (type)(_y))
#define ENA_MIN32(x,y) MIN(x, y)
#define ENA_MIN16(x,y) MIN(x, y)
#define ENA_MIN8(x,y) MIN(x, y)
#define ENA_MAX32(x,y) MAX(x, y)
#define ENA_MAX16(x,y) MAX(x, y)
#define ENA_MAX8(x,y) MAX(x, y)
/* Spinlock related methods */
#define ena_spinlock_t struct mtx
#define ENA_SPINLOCK_INIT(spinlock) \
mtx_init(&(spinlock), "ena_spin", NULL, MTX_SPIN)
#define ENA_SPINLOCK_DESTROY(spinlock) \
do { \
if (mtx_initialized(&(spinlock))) \
mtx_destroy(&(spinlock)); \
} while (0)
#define ENA_SPINLOCK_LOCK(spinlock, flags) \
do { \
(void)(flags); \
mtx_lock_spin(&(spinlock)); \
} while (0)
#define ENA_SPINLOCK_UNLOCK(spinlock, flags) \
do { \
(void)(flags); \
mtx_unlock_spin(&(spinlock)); \
} while (0)
/* Wait queue related methods */
#define ena_wait_event_t struct { struct cv wq; struct mtx mtx; }
#define ENA_WAIT_EVENT_INIT(waitqueue) \
do { \
cv_init(&((waitqueue).wq), "cv"); \
mtx_init(&((waitqueue).mtx), "wq", NULL, MTX_DEF); \
} while (0)
#define ENA_WAIT_EVENT_DESTROY(waitqueue) \
do { \
cv_destroy(&((waitqueue).wq)); \
mtx_destroy(&((waitqueue).mtx)); \
} while (0)
#define ENA_WAIT_EVENT_CLEAR(waitqueue) \
cv_init(&((waitqueue).wq), (waitqueue).wq.cv_description)
#define ENA_WAIT_EVENT_WAIT(waitqueue, timeout_us) \
do { \
mtx_lock(&((waitqueue).mtx)); \
cv_timedwait(&((waitqueue).wq), &((waitqueue).mtx), \
timeout_us * hz / 1000 / 1000 ); \
mtx_unlock(&((waitqueue).mtx)); \
} while (0)
#define ENA_WAIT_EVENT_SIGNAL(waitqueue) \
do { \
mtx_lock(&((waitqueue).mtx)); \
cv_broadcast(&((waitqueue).wq)); \
mtx_unlock(&((waitqueue).mtx)); \
} while (0)
#define dma_addr_t bus_addr_t
#define u8 uint8_t
#define u16 uint16_t
#define u32 uint32_t
#define u64 uint64_t
typedef struct {
bus_addr_t paddr;
caddr_t vaddr;
bus_dma_tag_t tag;
bus_dmamap_t map;
bus_dma_segment_t seg;
int nseg;
} ena_mem_handle_t;
struct ena_bus {
bus_space_handle_t reg_bar_h;
bus_space_tag_t reg_bar_t;
bus_space_handle_t mem_bar_h;
bus_space_tag_t mem_bar_t;
};
typedef uint32_t ena_atomic32_t;
void ena_dmamap_callback(void *arg, bus_dma_segment_t *segs, int nseg,
int error);
int ena_dma_alloc(device_t dmadev, bus_size_t size, ena_mem_handle_t *dma,
int mapflags);
#define ENA_MEMCPY_TO_DEVICE_64(dst, src, size) \
do { \
int count, i; \
volatile uint64_t *to = (volatile uint64_t *)(dst); \
const uint64_t *from = (const uint64_t *)(src); \
count = (size) / 8; \
\
for (i = 0; i < count; i++, from++, to++) \
*to = *from; \
} while (0)
#define ENA_MEM_ALLOC(dmadev, size) malloc(size, M_DEVBUF, M_NOWAIT | M_ZERO)
#define ENA_MEM_ALLOC_NODE(dmadev, size, virt, node, dev_node) (virt = NULL)
#define ENA_MEM_FREE(dmadev, ptr) free(ptr, M_DEVBUF)
#define ENA_MEM_ALLOC_COHERENT_NODE(dmadev, size, virt, phys, handle, node, \
dev_node) \
do { \
((virt) = NULL); \
(void)(dev_node); \
} while (0)
#define ENA_MEM_ALLOC_COHERENT(dmadev, size, virt, phys, dma) \
do { \
ena_dma_alloc((dmadev), (size), &(dma), 0); \
(virt) = (void *)(dma).vaddr; \
(phys) = (dma).paddr; \
} while (0)
#define ENA_MEM_FREE_COHERENT(dmadev, size, virt, phys, dma) \
do { \
(void)size; \
bus_dmamap_unload((dma).tag, (dma).map); \
bus_dmamem_free((dma).tag, (virt), (dma).map); \
bus_dma_tag_destroy((dma).tag); \
(dma).tag = NULL; \
(virt) = NULL; \
} while (0)
/* Register R/W methods */
#define ENA_REG_WRITE32(bus, value, offset) \
bus_space_write_4( \
((struct ena_bus*)bus)->reg_bar_t, \
((struct ena_bus*)bus)->reg_bar_h, \
(bus_size_t)(offset), (value))
#define ENA_REG_WRITE32_RELAXED(bus, value, offset) \
ENA_REG_WRITE32(bus, value, offset)
#define ENA_REG_READ32(bus, offset) \
bus_space_read_4( \
((struct ena_bus*)bus)->reg_bar_t, \
((struct ena_bus*)bus)->reg_bar_h, \
(bus_size_t)(offset))
#define ENA_DB_SYNC_WRITE(mem_handle) bus_dmamap_sync( \
(mem_handle)->tag, (mem_handle)->map, BUS_DMASYNC_PREWRITE)
#define ENA_DB_SYNC_PREREAD(mem_handle) bus_dmamap_sync( \
(mem_handle)->tag, (mem_handle)->map, BUS_DMASYNC_PREREAD)
#define ENA_DB_SYNC_POSTREAD(mem_handle) bus_dmamap_sync( \
(mem_handle)->tag, (mem_handle)->map, BUS_DMASYNC_POSTREAD)
#define ENA_DB_SYNC(mem_handle) ENA_DB_SYNC_WRITE(mem_handle)
#define time_after(a,b) ((long)((unsigned long)(b) - (unsigned long)(a)) < 0)
#define VLAN_HLEN sizeof(struct ether_vlan_header)
#define CSUM_OFFLOAD (CSUM_IP|CSUM_TCP|CSUM_UDP)
#define prefetch(x) (void)(x)
#define prefetchw(x) (void)(x)
/* DMA buffers access */
#define dma_unmap_addr(p, name) ((p)->dma->name)
#define dma_unmap_addr_set(p, name, v) (((p)->dma->name) = (v))
#define dma_unmap_len(p, name) ((p)->name)
#define dma_unmap_len_set(p, name, v) (((p)->name) = (v))
#define memcpy_toio memcpy
#define ATOMIC32_INC(I32_PTR) atomic_add_int(I32_PTR, 1)
#define ATOMIC32_DEC(I32_PTR) atomic_add_int(I32_PTR, -1)
#define ATOMIC32_READ(I32_PTR) atomic_load_acq_int(I32_PTR)
#define ATOMIC32_SET(I32_PTR, VAL) atomic_store_rel_int(I32_PTR, VAL)
#define barrier() __asm__ __volatile__("": : :"memory")
#define dma_rmb() barrier()
#define mmiowb() barrier()
#define ACCESS_ONCE(x) (*(volatile __typeof(x) *)&(x))
#define READ_ONCE(x) ({ \
__typeof(x) __var; \
barrier(); \
__var = ACCESS_ONCE(x); \
barrier(); \
__var; \
})
#define READ_ONCE8(x) READ_ONCE(x)
#define READ_ONCE16(x) READ_ONCE(x)
#define READ_ONCE32(x) READ_ONCE(x)
#define upper_32_bits(n) ((uint32_t)(((n) >> 16) >> 16))
#define lower_32_bits(n) ((uint32_t)(n))
#define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
#include "ena_defs/ena_includes.h"
#endif /* ENA_PLAT_H_ */
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