102 lines
2.1 KiB
C
102 lines
2.1 KiB
C
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/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(c) 2010-2020 Intel Corporation
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*/
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#include <rte_rawdev.h>
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#include <rte_ioat_rawdev.h>
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#include "ioat.h"
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#include "main.h"
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struct dma_for_vhost dma_bind[MAX_VHOST_DEVICE];
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int
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open_ioat(const char *value)
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{
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struct dma_for_vhost *dma_info = dma_bind;
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char *input = strndup(value, strlen(value) + 1);
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char *addrs = input;
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char *ptrs[2];
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char *start, *end, *substr;
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int64_t vid, vring_id;
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struct rte_ioat_rawdev_config config;
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struct rte_rawdev_info info = { .dev_private = &config };
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char name[32];
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int dev_id;
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int ret = 0;
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uint16_t i = 0;
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char *dma_arg[MAX_VHOST_DEVICE];
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uint8_t args_nr;
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while (isblank(*addrs))
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addrs++;
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if (*addrs == '\0') {
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ret = -1;
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goto out;
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}
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/* process DMA devices within bracket. */
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addrs++;
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substr = strtok(addrs, ";]");
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if (!substr) {
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ret = -1;
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goto out;
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}
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args_nr = rte_strsplit(substr, strlen(substr),
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dma_arg, MAX_VHOST_DEVICE, ',');
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do {
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char *arg_temp = dma_arg[i];
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rte_strsplit(arg_temp, strlen(arg_temp), ptrs, 2, '@');
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start = strstr(ptrs[0], "txd");
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if (start == NULL) {
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ret = -1;
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goto out;
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}
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start += 3;
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vid = strtol(start, &end, 0);
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if (end == start) {
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ret = -1;
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goto out;
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}
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vring_id = 0 + VIRTIO_RXQ;
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if (rte_pci_addr_parse(ptrs[1],
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&(dma_info + vid)->dmas[vring_id].addr) < 0) {
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ret = -1;
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goto out;
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}
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rte_pci_device_name(&(dma_info + vid)->dmas[vring_id].addr,
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name, sizeof(name));
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dev_id = rte_rawdev_get_dev_id(name);
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if (dev_id == (uint16_t)(-ENODEV) ||
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dev_id == (uint16_t)(-EINVAL)) {
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ret = -1;
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goto out;
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}
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if (rte_rawdev_info_get(dev_id, &info, sizeof(config)) < 0 ||
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strstr(info.driver_name, "ioat") == NULL) {
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ret = -1;
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goto out;
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}
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(dma_info + vid)->dmas[vring_id].dev_id = dev_id;
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(dma_info + vid)->dmas[vring_id].is_valid = true;
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config.ring_size = IOAT_RING_SIZE;
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config.hdls_disable = true;
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if (rte_rawdev_configure(dev_id, &info, sizeof(config)) < 0) {
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ret = -1;
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goto out;
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}
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rte_rawdev_start(dev_id);
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dma_info->nr++;
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i++;
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} while (i < args_nr);
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out:
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free(input);
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return ret;
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}
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