969e82ad81
Since this patch-set attempts to clean up the power library, and there are many instances of "unsigned" caught by checkpatch, it was decided to clean these up first rather than have them included in the later patches in the patch set. And would also minimise this type of error being caught by checkpatch in the future Signed-off-by: Marko Kovacevic <marko.kovacevic@intel.com> Acked-by: David Hunt <david.hunt@intel.com>
142 lines
3.3 KiB
C
142 lines
3.3 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(c) 2010-2014 Intel Corporation
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <signal.h>
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#include <limits.h>
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#include <fcntl.h>
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#include <string.h>
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#include <errno.h>
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#include <rte_log.h>
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#include "guest_channel.h"
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#include "channel_commands.h"
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#define RTE_LOGTYPE_GUEST_CHANNEL RTE_LOGTYPE_USER1
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static int global_fds[RTE_MAX_LCORE];
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int
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guest_channel_host_connect(const char *path, unsigned int lcore_id)
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{
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int flags, ret;
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struct channel_packet pkt;
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char fd_path[PATH_MAX];
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int fd = -1;
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if (lcore_id >= RTE_MAX_LCORE) {
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RTE_LOG(ERR, GUEST_CHANNEL, "Channel(%u) is out of range 0...%d\n",
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lcore_id, RTE_MAX_LCORE-1);
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return -1;
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}
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/* check if path is already open */
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if (global_fds[lcore_id] != 0) {
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RTE_LOG(ERR, GUEST_CHANNEL, "Channel(%u) is already open with fd %d\n",
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lcore_id, global_fds[lcore_id]);
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return -1;
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}
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snprintf(fd_path, PATH_MAX, "%s.%u", path, lcore_id);
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RTE_LOG(INFO, GUEST_CHANNEL, "Opening channel '%s' for lcore %u\n",
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fd_path, lcore_id);
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fd = open(fd_path, O_RDWR);
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if (fd < 0) {
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RTE_LOG(ERR, GUEST_CHANNEL, "Unable to to connect to '%s' with error "
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"%s\n", fd_path, strerror(errno));
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return -1;
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}
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flags = fcntl(fd, F_GETFL, 0);
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if (flags < 0) {
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RTE_LOG(ERR, GUEST_CHANNEL, "Failed on fcntl get flags for file %s\n",
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fd_path);
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goto error;
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}
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flags |= O_NONBLOCK;
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if (fcntl(fd, F_SETFL, flags) < 0) {
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RTE_LOG(ERR, GUEST_CHANNEL, "Failed on setting non-blocking mode for "
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"file %s", fd_path);
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goto error;
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}
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/* QEMU needs a delay after connection */
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sleep(1);
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/* Send a test packet, this command is ignored by the host, but a successful
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* send indicates that the host endpoint is monitoring.
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*/
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pkt.command = CPU_POWER_CONNECT;
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global_fds[lcore_id] = fd;
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ret = guest_channel_send_msg(&pkt, lcore_id);
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if (ret != 0) {
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RTE_LOG(ERR, GUEST_CHANNEL,
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"Error on channel '%s' communications test: %s\n",
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fd_path, ret > 0 ? strerror(ret) :
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"channel not connected");
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goto error;
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}
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RTE_LOG(INFO, GUEST_CHANNEL, "Channel '%s' is now connected\n", fd_path);
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return 0;
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error:
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close(fd);
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global_fds[lcore_id] = 0;
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return -1;
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}
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int
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guest_channel_send_msg(struct channel_packet *pkt, unsigned int lcore_id)
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{
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int ret, buffer_len = sizeof(*pkt);
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void *buffer = pkt;
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if (lcore_id >= RTE_MAX_LCORE) {
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RTE_LOG(ERR, GUEST_CHANNEL, "Channel(%u) is out of range 0...%d\n",
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lcore_id, RTE_MAX_LCORE-1);
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return -1;
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}
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if (global_fds[lcore_id] == 0) {
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RTE_LOG(ERR, GUEST_CHANNEL, "Channel is not connected\n");
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return -1;
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}
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while (buffer_len > 0) {
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ret = write(global_fds[lcore_id], buffer, buffer_len);
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if (ret == buffer_len)
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return 0;
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if (ret == -1) {
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if (errno == EINTR)
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continue;
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return errno;
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}
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buffer = (char *)buffer + ret;
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buffer_len -= ret;
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}
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return 0;
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}
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int rte_power_guest_channel_send_msg(struct channel_packet *pkt,
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unsigned int lcore_id)
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{
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return guest_channel_send_msg(pkt, lcore_id);
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}
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void
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guest_channel_host_disconnect(unsigned int lcore_id)
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{
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if (lcore_id >= RTE_MAX_LCORE) {
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RTE_LOG(ERR, GUEST_CHANNEL, "Channel(%u) is out of range 0...%d\n",
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lcore_id, RTE_MAX_LCORE-1);
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return;
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}
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if (global_fds[lcore_id] == 0)
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return;
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close(global_fds[lcore_id]);
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global_fds[lcore_id] = 0;
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}
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