mirror of https://github.com/F-Stack/f-stack.git
264 lines
6.5 KiB
C
264 lines
6.5 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(C) 2021 Marvell.
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*/
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#include "roc_api.h"
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#include "roc_priv.h"
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#if defined(__linux__)
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#include <inttypes.h>
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#include <linux/vfio.h>
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#include <sys/eventfd.h>
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#include <sys/ioctl.h>
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#include <unistd.h>
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#define MSIX_IRQ_SET_BUF_LEN \
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(sizeof(struct vfio_irq_set) + sizeof(int) * \
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(plt_intr_max_intr_get(intr_handle)))
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static int
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irq_get_info(struct plt_intr_handle *intr_handle)
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{
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struct vfio_irq_info irq = {.argsz = sizeof(irq)};
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int rc, vfio_dev_fd;
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irq.index = VFIO_PCI_MSIX_IRQ_INDEX;
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vfio_dev_fd = plt_intr_dev_fd_get(intr_handle);
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rc = ioctl(vfio_dev_fd, VFIO_DEVICE_GET_IRQ_INFO, &irq);
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if (rc < 0) {
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plt_err("Failed to get IRQ info rc=%d errno=%d", rc, errno);
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return rc;
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}
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plt_base_dbg("Flags=0x%x index=0x%x count=0x%x max_intr_vec_id=0x%x",
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irq.flags, irq.index, irq.count, PLT_MAX_RXTX_INTR_VEC_ID);
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if (irq.count == 0) {
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plt_err("HW max=%d > PLT_MAX_RXTX_INTR_VEC_ID: %d", irq.count,
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PLT_MAX_RXTX_INTR_VEC_ID);
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plt_intr_max_intr_set(intr_handle, PLT_MAX_RXTX_INTR_VEC_ID);
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} else {
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if (plt_intr_max_intr_set(intr_handle, irq.count))
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return -1;
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}
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return 0;
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}
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static int
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irq_config(struct plt_intr_handle *intr_handle, unsigned int vec)
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{
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char irq_set_buf[MSIX_IRQ_SET_BUF_LEN];
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struct vfio_irq_set *irq_set;
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int len, rc, vfio_dev_fd;
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int32_t *fd_ptr;
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if (vec > (uint32_t)plt_intr_max_intr_get(intr_handle)) {
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plt_err("vector=%d greater than max_intr=%d", vec,
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plt_intr_max_intr_get(intr_handle));
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return -EINVAL;
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}
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len = sizeof(struct vfio_irq_set) + sizeof(int32_t);
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irq_set = (struct vfio_irq_set *)irq_set_buf;
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irq_set->argsz = len;
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irq_set->start = vec;
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irq_set->count = 1;
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irq_set->flags =
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VFIO_IRQ_SET_DATA_EVENTFD | VFIO_IRQ_SET_ACTION_TRIGGER;
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irq_set->index = VFIO_PCI_MSIX_IRQ_INDEX;
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/* Use vec fd to set interrupt vectors */
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fd_ptr = (int32_t *)&irq_set->data[0];
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fd_ptr[0] = plt_intr_efds_index_get(intr_handle, vec);
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vfio_dev_fd = plt_intr_dev_fd_get(intr_handle);
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rc = ioctl(vfio_dev_fd, VFIO_DEVICE_SET_IRQS, irq_set);
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if (rc)
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plt_err("Failed to set_irqs vector=0x%x rc=%d", vec, rc);
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return rc;
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}
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static int
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irq_init(struct plt_intr_handle *intr_handle)
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{
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char irq_set_buf[MSIX_IRQ_SET_BUF_LEN];
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struct vfio_irq_set *irq_set;
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int len, rc, vfio_dev_fd;
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int32_t *fd_ptr;
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uint32_t i;
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len = sizeof(struct vfio_irq_set) +
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sizeof(int32_t) * plt_intr_max_intr_get(intr_handle);
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irq_set = (struct vfio_irq_set *)irq_set_buf;
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irq_set->argsz = len;
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irq_set->start = 0;
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irq_set->count = plt_intr_max_intr_get(intr_handle);
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irq_set->flags =
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VFIO_IRQ_SET_DATA_EVENTFD | VFIO_IRQ_SET_ACTION_TRIGGER;
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irq_set->index = VFIO_PCI_MSIX_IRQ_INDEX;
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fd_ptr = (int32_t *)&irq_set->data[0];
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for (i = 0; i < irq_set->count; i++)
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fd_ptr[i] = -1;
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vfio_dev_fd = plt_intr_dev_fd_get(intr_handle);
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rc = ioctl(vfio_dev_fd, VFIO_DEVICE_SET_IRQS, irq_set);
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if (rc)
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plt_err("Failed to set irqs vector rc=%d", rc);
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return rc;
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}
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int
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dev_irqs_disable(struct plt_intr_handle *intr_handle)
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{
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/* Clear max_intr to indicate re-init next time */
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plt_intr_max_intr_set(intr_handle, 0);
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return plt_intr_disable(intr_handle);
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}
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int
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dev_irq_register(struct plt_intr_handle *intr_handle, plt_intr_callback_fn cb,
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void *data, unsigned int vec)
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{
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struct plt_intr_handle *tmp_handle;
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uint32_t nb_efd, tmp_nb_efd;
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int rc, fd;
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/* If no max_intr read from VFIO */
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if (plt_intr_max_intr_get(intr_handle) == 0) {
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irq_get_info(intr_handle);
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irq_init(intr_handle);
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}
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if (vec > (uint32_t)plt_intr_max_intr_get(intr_handle)) {
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plt_err("Vector=%d greater than max_intr=%d or ",
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vec, plt_intr_max_intr_get(intr_handle));
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return -EINVAL;
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}
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tmp_handle = intr_handle;
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/* Create new eventfd for interrupt vector */
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fd = eventfd(0, EFD_NONBLOCK | EFD_CLOEXEC);
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if (fd == -1)
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return -ENODEV;
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if (plt_intr_fd_set(tmp_handle, fd))
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return -errno;
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/* Register vector interrupt callback */
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rc = plt_intr_callback_register(tmp_handle, cb, data);
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if (rc) {
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plt_err("Failed to register vector:0x%x irq callback.", vec);
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return rc;
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}
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rc = plt_intr_efds_index_set(intr_handle, vec, fd);
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if (rc)
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return rc;
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nb_efd = (vec > (uint32_t)plt_intr_nb_efd_get(intr_handle)) ?
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vec : (uint32_t)plt_intr_nb_efd_get(intr_handle);
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plt_intr_nb_efd_set(intr_handle, nb_efd);
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tmp_nb_efd = plt_intr_nb_efd_get(intr_handle) + 1;
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if (tmp_nb_efd > (uint32_t)plt_intr_max_intr_get(intr_handle))
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plt_intr_max_intr_set(intr_handle, tmp_nb_efd);
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plt_base_dbg("Enable vector:0x%x for vfio (efds: %d, max:%d)", vec,
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plt_intr_nb_efd_get(intr_handle),
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plt_intr_max_intr_get(intr_handle));
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/* Enable MSIX vectors to VFIO */
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return irq_config(intr_handle, vec);
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}
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void
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dev_irq_unregister(struct plt_intr_handle *intr_handle, plt_intr_callback_fn cb,
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void *data, unsigned int vec)
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{
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struct plt_intr_handle *tmp_handle;
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uint8_t retries = 5; /* 5 ms */
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int rc, fd;
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if (vec > (uint32_t)plt_intr_max_intr_get(intr_handle)) {
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plt_err("Error unregistering MSI-X interrupts vec:%d > %d", vec,
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plt_intr_max_intr_get(intr_handle));
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return;
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}
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tmp_handle = intr_handle;
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fd = plt_intr_efds_index_get(intr_handle, vec);
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if (fd == -1)
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return;
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if (plt_intr_fd_set(tmp_handle, fd))
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return;
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do {
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/* Un-register callback func from platform lib */
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rc = plt_intr_callback_unregister(tmp_handle, cb, data);
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/* Retry only if -EAGAIN */
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if (rc != -EAGAIN)
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break;
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plt_delay_ms(1);
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retries--;
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} while (retries);
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if (rc < 0) {
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plt_err("Error unregistering MSI-X vec %d cb, rc=%d", vec, rc);
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return;
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}
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plt_base_dbg("Disable vector:0x%x for vfio (efds: %d, max:%d)", vec,
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plt_intr_nb_efd_get(intr_handle),
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plt_intr_max_intr_get(intr_handle));
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if (plt_intr_efds_index_get(intr_handle, vec) != -1)
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close(plt_intr_efds_index_get(intr_handle, vec));
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/* Disable MSIX vectors from VFIO */
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plt_intr_efds_index_set(intr_handle, vec, -1);
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irq_config(intr_handle, vec);
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}
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#else
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int
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dev_irq_register(struct plt_intr_handle *intr_handle, plt_intr_callback_fn cb,
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void *data, unsigned int vec)
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{
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PLT_SET_USED(intr_handle);
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PLT_SET_USED(cb);
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PLT_SET_USED(data);
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PLT_SET_USED(vec);
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return -ENOTSUP;
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}
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void
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dev_irq_unregister(struct plt_intr_handle *intr_handle, plt_intr_callback_fn cb,
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void *data, unsigned int vec)
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{
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PLT_SET_USED(intr_handle);
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PLT_SET_USED(cb);
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PLT_SET_USED(data);
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PLT_SET_USED(vec);
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}
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int
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dev_irqs_disable(struct plt_intr_handle *intr_handle)
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{
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PLT_SET_USED(intr_handle);
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return -ENOTSUP;
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}
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#endif /* __linux__ */
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