numam-dpdk/drivers/net/nfp/nfp_cpp_bridge.c
Heinrich Kuhn 8d7a59f171 net/nfp: rename files for consistency
Rename the nfp_net.c file to nfp_common as it now contains functions
common to VF and PF functionality. Rename the header file too to be
consistent. Also remove the "net" naming from the _ctrl and _logs files
for consistency across the PMD.

Signed-off-by: Heinrich Kuhn <heinrich.kuhn@netronome.com>
Signed-off-by: Simon Horman <simon.horman@corigine.com>
2021-08-17 18:26:57 +02:00

393 lines
9.8 KiB
C

/* SPDX-License-Identifier: BSD-3-Clause
* Copyright (c) 2014-2021 Netronome Systems, Inc.
* All rights reserved.
*
* Small portions derived from code Copyright(c) 2010-2015 Intel Corporation.
*/
/*
* vim:shiftwidth=8:noexpandtab
*
* @file dpdk/pmd/nfp_cpp_bridge.c
*
* Netronome vNIC DPDK Poll-Mode Driver: CPP Bridge
*/
#include <rte_service_component.h>
#include "nfpcore/nfp_cpp.h"
#include "nfpcore/nfp_mip.h"
#include "nfpcore/nfp_nsp.h"
#include "nfp_logs.h"
#include "nfp_cpp_bridge.h"
#include <sys/ioctl.h>
/* Prototypes */
static int nfp_cpp_bridge_serve_write(int sockfd, struct nfp_cpp *cpp);
static int nfp_cpp_bridge_serve_read(int sockfd, struct nfp_cpp *cpp);
static int nfp_cpp_bridge_serve_ioctl(int sockfd, struct nfp_cpp *cpp);
void nfp_register_cpp_service(struct nfp_cpp *cpp)
{
uint32_t *cpp_service_id = NULL;
struct rte_service_spec service;
memset(&service, 0, sizeof(struct rte_service_spec));
snprintf(service.name, sizeof(service.name), "nfp_cpp_service");
service.callback = nfp_cpp_bridge_service_func;
service.callback_userdata = (void *)cpp;
if (rte_service_component_register(&service,
cpp_service_id))
RTE_LOG(WARNING, PMD, "NFP CPP bridge service register() failed");
else
RTE_LOG(DEBUG, PMD, "NFP CPP bridge service registered");
}
/*
* Serving a write request to NFP from host programs. The request
* sends the write size and the CPP target. The bridge makes use
* of CPP interface handler configured by the PMD setup.
*/
static int
nfp_cpp_bridge_serve_write(int sockfd, struct nfp_cpp *cpp)
{
struct nfp_cpp_area *area;
off_t offset, nfp_offset;
uint32_t cpp_id, pos, len;
uint32_t tmpbuf[16];
size_t count, curlen, totlen = 0;
int err = 0;
PMD_CPP_LOG(DEBUG, "%s: offset size %zu, count_size: %zu\n", __func__,
sizeof(off_t), sizeof(size_t));
/* Reading the count param */
err = recv(sockfd, &count, sizeof(off_t), 0);
if (err != sizeof(off_t))
return -EINVAL;
curlen = count;
/* Reading the offset param */
err = recv(sockfd, &offset, sizeof(off_t), 0);
if (err != sizeof(off_t))
return -EINVAL;
/* Obtain target's CPP ID and offset in target */
cpp_id = (offset >> 40) << 8;
nfp_offset = offset & ((1ull << 40) - 1);
PMD_CPP_LOG(DEBUG, "%s: count %zu and offset %jd\n", __func__, count,
offset);
PMD_CPP_LOG(DEBUG, "%s: cpp_id %08x and nfp_offset %jd\n", __func__,
cpp_id, nfp_offset);
/* Adjust length if not aligned */
if (((nfp_offset + (off_t)count - 1) & ~(NFP_CPP_MEMIO_BOUNDARY - 1)) !=
(nfp_offset & ~(NFP_CPP_MEMIO_BOUNDARY - 1))) {
curlen = NFP_CPP_MEMIO_BOUNDARY -
(nfp_offset & (NFP_CPP_MEMIO_BOUNDARY - 1));
}
while (count > 0) {
/* configure a CPP PCIe2CPP BAR for mapping the CPP target */
area = nfp_cpp_area_alloc_with_name(cpp, cpp_id, "nfp.cdev",
nfp_offset, curlen);
if (!area) {
RTE_LOG(ERR, PMD, "%s: area alloc fail\n", __func__);
return -EIO;
}
/* mapping the target */
err = nfp_cpp_area_acquire(area);
if (err < 0) {
RTE_LOG(ERR, PMD, "area acquire failed\n");
nfp_cpp_area_free(area);
return -EIO;
}
for (pos = 0; pos < curlen; pos += len) {
len = curlen - pos;
if (len > sizeof(tmpbuf))
len = sizeof(tmpbuf);
PMD_CPP_LOG(DEBUG, "%s: Receive %u of %zu\n", __func__,
len, count);
err = recv(sockfd, tmpbuf, len, MSG_WAITALL);
if (err != (int)len) {
RTE_LOG(ERR, PMD,
"%s: error when receiving, %d of %zu\n",
__func__, err, count);
nfp_cpp_area_release(area);
nfp_cpp_area_free(area);
return -EIO;
}
err = nfp_cpp_area_write(area, pos, tmpbuf, len);
if (err < 0) {
RTE_LOG(ERR, PMD, "nfp_cpp_area_write error\n");
nfp_cpp_area_release(area);
nfp_cpp_area_free(area);
return -EIO;
}
}
nfp_offset += pos;
totlen += pos;
nfp_cpp_area_release(area);
nfp_cpp_area_free(area);
count -= pos;
curlen = (count > NFP_CPP_MEMIO_BOUNDARY) ?
NFP_CPP_MEMIO_BOUNDARY : count;
}
return 0;
}
/*
* Serving a read request to NFP from host programs. The request
* sends the read size and the CPP target. The bridge makes use
* of CPP interface handler configured by the PMD setup. The read
* data is sent to the requester using the same socket.
*/
static int
nfp_cpp_bridge_serve_read(int sockfd, struct nfp_cpp *cpp)
{
struct nfp_cpp_area *area;
off_t offset, nfp_offset;
uint32_t cpp_id, pos, len;
uint32_t tmpbuf[16];
size_t count, curlen, totlen = 0;
int err = 0;
PMD_CPP_LOG(DEBUG, "%s: offset size %zu, count_size: %zu\n", __func__,
sizeof(off_t), sizeof(size_t));
/* Reading the count param */
err = recv(sockfd, &count, sizeof(off_t), 0);
if (err != sizeof(off_t))
return -EINVAL;
curlen = count;
/* Reading the offset param */
err = recv(sockfd, &offset, sizeof(off_t), 0);
if (err != sizeof(off_t))
return -EINVAL;
/* Obtain target's CPP ID and offset in target */
cpp_id = (offset >> 40) << 8;
nfp_offset = offset & ((1ull << 40) - 1);
PMD_CPP_LOG(DEBUG, "%s: count %zu and offset %jd\n", __func__, count,
offset);
PMD_CPP_LOG(DEBUG, "%s: cpp_id %08x and nfp_offset %jd\n", __func__,
cpp_id, nfp_offset);
/* Adjust length if not aligned */
if (((nfp_offset + (off_t)count - 1) & ~(NFP_CPP_MEMIO_BOUNDARY - 1)) !=
(nfp_offset & ~(NFP_CPP_MEMIO_BOUNDARY - 1))) {
curlen = NFP_CPP_MEMIO_BOUNDARY -
(nfp_offset & (NFP_CPP_MEMIO_BOUNDARY - 1));
}
while (count > 0) {
area = nfp_cpp_area_alloc_with_name(cpp, cpp_id, "nfp.cdev",
nfp_offset, curlen);
if (!area) {
RTE_LOG(ERR, PMD, "%s: area alloc failed\n", __func__);
return -EIO;
}
err = nfp_cpp_area_acquire(area);
if (err < 0) {
RTE_LOG(ERR, PMD, "area acquire failed\n");
nfp_cpp_area_free(area);
return -EIO;
}
for (pos = 0; pos < curlen; pos += len) {
len = curlen - pos;
if (len > sizeof(tmpbuf))
len = sizeof(tmpbuf);
err = nfp_cpp_area_read(area, pos, tmpbuf, len);
if (err < 0) {
RTE_LOG(ERR, PMD, "nfp_cpp_area_read error\n");
nfp_cpp_area_release(area);
nfp_cpp_area_free(area);
return -EIO;
}
PMD_CPP_LOG(DEBUG, "%s: sending %u of %zu\n", __func__,
len, count);
err = send(sockfd, tmpbuf, len, 0);
if (err != (int)len) {
RTE_LOG(ERR, PMD,
"%s: error when sending: %d of %zu\n",
__func__, err, count);
nfp_cpp_area_release(area);
nfp_cpp_area_free(area);
return -EIO;
}
}
nfp_offset += pos;
totlen += pos;
nfp_cpp_area_release(area);
nfp_cpp_area_free(area);
count -= pos;
curlen = (count > NFP_CPP_MEMIO_BOUNDARY) ?
NFP_CPP_MEMIO_BOUNDARY : count;
}
return 0;
}
/*
* Serving a ioctl command from host NFP tools. This usually goes to
* a kernel driver char driver but it is not available when the PF is
* bound to the PMD. Currently just one ioctl command is served and it
* does not require any CPP access at all.
*/
static int
nfp_cpp_bridge_serve_ioctl(int sockfd, struct nfp_cpp *cpp)
{
uint32_t cmd, ident_size, tmp;
int err;
/* Reading now the IOCTL command */
err = recv(sockfd, &cmd, 4, 0);
if (err != 4) {
RTE_LOG(ERR, PMD, "%s: read error from socket\n", __func__);
return -EIO;
}
/* Only supporting NFP_IOCTL_CPP_IDENTIFICATION */
if (cmd != NFP_IOCTL_CPP_IDENTIFICATION) {
RTE_LOG(ERR, PMD, "%s: unknown cmd %d\n", __func__, cmd);
return -EINVAL;
}
err = recv(sockfd, &ident_size, 4, 0);
if (err != 4) {
RTE_LOG(ERR, PMD, "%s: read error from socket\n", __func__);
return -EIO;
}
tmp = nfp_cpp_model(cpp);
PMD_CPP_LOG(DEBUG, "%s: sending NFP model %08x\n", __func__, tmp);
err = send(sockfd, &tmp, 4, 0);
if (err != 4) {
RTE_LOG(ERR, PMD, "%s: error writing to socket\n", __func__);
return -EIO;
}
tmp = cpp->interface;
PMD_CPP_LOG(DEBUG, "%s: sending NFP interface %08x\n", __func__, tmp);
err = send(sockfd, &tmp, 4, 0);
if (err != 4) {
RTE_LOG(ERR, PMD, "%s: error writing to socket\n", __func__);
return -EIO;
}
return 0;
}
/*
* This is the code to be executed by a service core. The CPP bridge interface
* is based on a unix socket and requests usually received by a kernel char
* driver, read, write and ioctl, are handled by the CPP bridge. NFP host tools
* can be executed with a wrapper library and LD_LIBRARY being completely
* unaware of the CPP bridge performing the NFP kernel char driver for CPP
* accesses.
*/
int32_t
nfp_cpp_bridge_service_func(void *args)
{
struct sockaddr address;
struct nfp_cpp *cpp = args;
int sockfd, datafd, op, ret;
unlink("/tmp/nfp_cpp");
sockfd = socket(AF_UNIX, SOCK_STREAM, 0);
if (sockfd < 0) {
RTE_LOG(ERR, PMD, "%s: socket creation error. Service failed\n",
__func__);
return -EIO;
}
memset(&address, 0, sizeof(struct sockaddr));
address.sa_family = AF_UNIX;
strcpy(address.sa_data, "/tmp/nfp_cpp");
ret = bind(sockfd, (const struct sockaddr *)&address,
sizeof(struct sockaddr));
if (ret < 0) {
RTE_LOG(ERR, PMD, "%s: bind error (%d). Service failed\n",
__func__, errno);
close(sockfd);
return ret;
}
ret = listen(sockfd, 20);
if (ret < 0) {
RTE_LOG(ERR, PMD, "%s: listen error(%d). Service failed\n",
__func__, errno);
close(sockfd);
return ret;
}
for (;;) {
datafd = accept(sockfd, NULL, NULL);
if (datafd < 0) {
RTE_LOG(ERR, PMD, "%s: accept call error (%d)\n",
__func__, errno);
RTE_LOG(ERR, PMD, "%s: service failed\n", __func__);
close(sockfd);
return -EIO;
}
while (1) {
ret = recv(datafd, &op, 4, 0);
if (ret <= 0) {
PMD_CPP_LOG(DEBUG, "%s: socket close\n",
__func__);
break;
}
PMD_CPP_LOG(DEBUG, "%s: getting op %u\n", __func__, op);
if (op == NFP_BRIDGE_OP_READ)
nfp_cpp_bridge_serve_read(datafd, cpp);
if (op == NFP_BRIDGE_OP_WRITE)
nfp_cpp_bridge_serve_write(datafd, cpp);
if (op == NFP_BRIDGE_OP_IOCTL)
nfp_cpp_bridge_serve_ioctl(datafd, cpp);
if (op == 0)
break;
}
close(datafd);
}
close(sockfd);
return 0;
}
/*
* Local variables:
* c-file-style: "Linux"
* indent-tabs-mode: t
* End:
*/