26b7dbae67
Add VFIO support for BCMFS PMD. The BCMFS PMD functionality is dependent on the VFIO_PRESENT flag, which gets enabled in the rte_vfio.h. If this flag is not enabled in the compiling platform driver will silently return with error, when executed. Signed-off-by: Vikas Gupta <vikas.gupta@broadcom.com> Signed-off-by: Raveendra Padasalagi <raveendra.padasalagi@broadcom.com> Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com> Acked-by: Akhil Goyal <akhil.goyal@nxp.com>
108 lines
2.1 KiB
C
108 lines
2.1 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(C) 2020 Broadcom.
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* All rights reserved.
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*/
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#include <errno.h>
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#include <sys/mman.h>
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#include <sys/ioctl.h>
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#include <rte_vfio.h>
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#include "bcmfs_device.h"
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#include "bcmfs_logs.h"
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#include "bcmfs_vfio.h"
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#ifdef VFIO_PRESENT
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static int
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vfio_map_dev_obj(const char *path, const char *dev_obj,
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uint32_t *size, void **addr, int *dev_fd)
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{
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int32_t ret;
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struct vfio_group_status status = { .argsz = sizeof(status) };
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struct vfio_device_info d_info = { .argsz = sizeof(d_info) };
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struct vfio_region_info reg_info = { .argsz = sizeof(reg_info) };
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ret = rte_vfio_setup_device(path, dev_obj, dev_fd, &d_info);
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if (ret) {
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BCMFS_LOG(ERR, "VFIO Setting for device failed");
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return ret;
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}
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/* getting device region info*/
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ret = ioctl(*dev_fd, VFIO_DEVICE_GET_REGION_INFO, ®_info);
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if (ret < 0) {
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BCMFS_LOG(ERR, "Error in VFIO getting REGION_INFO");
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goto map_failed;
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}
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*addr = mmap(NULL, reg_info.size,
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PROT_WRITE | PROT_READ, MAP_SHARED,
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*dev_fd, reg_info.offset);
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if (*addr == MAP_FAILED) {
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BCMFS_LOG(ERR, "Error mapping region (errno = %d)", errno);
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ret = errno;
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goto map_failed;
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}
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*size = reg_info.size;
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return 0;
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map_failed:
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rte_vfio_release_device(path, dev_obj, *dev_fd);
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return ret;
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}
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int
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bcmfs_attach_vfio(struct bcmfs_device *dev)
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{
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int ret;
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int vfio_dev_fd;
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void *v_addr = NULL;
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uint32_t size = 0;
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ret = vfio_map_dev_obj(dev->dirname, dev->name,
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&size, &v_addr, &vfio_dev_fd);
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if (ret)
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return -1;
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dev->mmap_size = size;
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dev->mmap_addr = v_addr;
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dev->vfio_dev_fd = vfio_dev_fd;
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return 0;
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}
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void
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bcmfs_release_vfio(struct bcmfs_device *dev)
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{
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int ret;
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if (dev == NULL)
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return;
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/* unmap the addr */
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munmap(dev->mmap_addr, dev->mmap_size);
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/* release the device */
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ret = rte_vfio_release_device(dev->dirname, dev->name,
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dev->vfio_dev_fd);
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if (ret < 0) {
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BCMFS_LOG(ERR, "cannot release device");
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return;
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}
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}
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#else
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int
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bcmfs_attach_vfio(struct bcmfs_device *dev __rte_unused)
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{
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return -1;
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}
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void
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bcmfs_release_vfio(struct bcmfs_device *dev __rte_unused)
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{
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}
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#endif
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