+static void *
+mbox_mem_map(off_t off, size_t size)
+{
+ void *va = MAP_FAILED;
+ int mem_fd;
+
+ if (size <= 0 || !off) {
+ plt_err("Invalid mbox area off 0x%lx size %lu", off, size);
+ goto error;
+ }
+
+ mem_fd = open("/dev/mem", O_RDWR);
+ if (mem_fd < 0)
+ goto error;
+
+ va = plt_mmap(NULL, size, PLT_PROT_READ | PLT_PROT_WRITE,
+ PLT_MAP_SHARED, mem_fd, off);
+ close(mem_fd);
+
+ if (va == MAP_FAILED)
+ plt_err("Failed to mmap sz=0x%zx, fd=%d, off=%jd", size, mem_fd,
+ (intmax_t)off);
+error:
+ return va;
+}
+
+static void
+mbox_mem_unmap(void *va, size_t size)
+{
+ if (va)
+ munmap(va, size);
+}
+
+static int
+pf_af_sync_msg(struct dev *dev, struct mbox_msghdr **rsp)
+{
+ uint32_t timeout = 0, sleep = 1;
+ struct mbox *mbox = dev->mbox;
+ struct mbox_dev *mdev = &mbox->dev[0];
+
+ volatile uint64_t int_status;
+ struct mbox_msghdr *msghdr;
+ uint64_t off;
+ int rc = 0;
+
+ /* We need to disable PF interrupts. We are in timer interrupt */
+ plt_write64(~0ull, dev->bar2 + RVU_PF_INT_ENA_W1C);
+
+ /* Send message */
+ mbox_msg_send(mbox, 0);
+
+ do {
+ plt_delay_ms(sleep);
+ timeout += sleep;
+ if (timeout >= mbox->rsp_tmo) {
+ plt_err("Message timeout: %dms", mbox->rsp_tmo);
+ rc = -EIO;
+ break;
+ }
+ int_status = plt_read64(dev->bar2 + RVU_PF_INT);
+ } while ((int_status & 0x1) != 0x1);
+
+ /* Clear */
+ plt_write64(int_status, dev->bar2 + RVU_PF_INT);
+
+ /* Enable interrupts */
+ plt_write64(~0ull, dev->bar2 + RVU_PF_INT_ENA_W1S);
+
+ if (rc == 0) {
+ /* Get message */
+ off = mbox->rx_start +
+ PLT_ALIGN(sizeof(struct mbox_hdr), MBOX_MSG_ALIGN);
+ msghdr = (struct mbox_msghdr *)((uintptr_t)mdev->mbase + off);
+ if (rsp)
+ *rsp = msghdr;
+ rc = msghdr->rc;
+ }
+
+ return rc;
+}
+
+static int
+af_pf_wait_msg(struct dev *dev, uint16_t vf, int num_msg)
+{
+ uint32_t timeout = 0, sleep = 1;
+ struct mbox *mbox = dev->mbox;
+ struct mbox_dev *mdev = &mbox->dev[0];
+ volatile uint64_t int_status;
+ struct mbox_hdr *req_hdr;
+ struct mbox_msghdr *msg;
+ struct mbox_msghdr *rsp;
+ uint64_t offset;
+ size_t size;
+ int i;
+
+ /* We need to disable PF interrupts. We are in timer interrupt */
+ plt_write64(~0ull, dev->bar2 + RVU_PF_INT_ENA_W1C);
+
+ /* Send message */
+ mbox_msg_send(mbox, 0);
+
+ do {
+ plt_delay_ms(sleep);
+ timeout++;
+ if (timeout >= mbox->rsp_tmo) {
+ plt_err("Routed messages %d timeout: %dms", num_msg,
+ mbox->rsp_tmo);
+ break;
+ }
+ int_status = plt_read64(dev->bar2 + RVU_PF_INT);
+ } while ((int_status & 0x1) != 0x1);
+
+ /* Clear */
+ plt_write64(~0ull, dev->bar2 + RVU_PF_INT);
+
+ /* Enable interrupts */
+ plt_write64(~0ull, dev->bar2 + RVU_PF_INT_ENA_W1S);
+
+ plt_spinlock_lock(&mdev->mbox_lock);
+
+ req_hdr = (struct mbox_hdr *)((uintptr_t)mdev->mbase + mbox->rx_start);
+ if (req_hdr->num_msgs != num_msg)
+ plt_err("Routed messages: %d received: %d", num_msg,
+ req_hdr->num_msgs);
+
+ /* Get messages from mbox */
+ offset = mbox->rx_start +
+ PLT_ALIGN(sizeof(struct mbox_hdr), MBOX_MSG_ALIGN);
+ for (i = 0; i < req_hdr->num_msgs; i++) {
+ msg = (struct mbox_msghdr *)((uintptr_t)mdev->mbase + offset);
+ size = mbox->rx_start + msg->next_msgoff - offset;
+
+ /* Reserve PF/VF mbox message */
+ size = PLT_ALIGN(size, MBOX_MSG_ALIGN);
+ rsp = mbox_alloc_msg(&dev->mbox_vfpf, vf, size);
+ mbox_rsp_init(msg->id, rsp);
+
+ /* Copy message from AF<->PF mbox to PF<->VF mbox */
+ mbox_memcpy((uint8_t *)rsp + sizeof(struct mbox_msghdr),
+ (uint8_t *)msg + sizeof(struct mbox_msghdr),
+ size - sizeof(struct mbox_msghdr));
+
+ /* Set status and sender pf_func data */
+ rsp->rc = msg->rc;
+ rsp->pcifunc = msg->pcifunc;
+
+ offset = mbox->rx_start + msg->next_msgoff;
+ }
+ plt_spinlock_unlock(&mdev->mbox_lock);
+
+ return req_hdr->num_msgs;
+}
+
+static int
+vf_pf_process_msgs(struct dev *dev, uint16_t vf)
+{
+ struct mbox *mbox = &dev->mbox_vfpf;
+ struct mbox_dev *mdev = &mbox->dev[vf];
+ struct mbox_hdr *req_hdr;
+ struct mbox_msghdr *msg;
+ int offset, routed = 0;
+ size_t size;
+ uint16_t i;
+
+ req_hdr = (struct mbox_hdr *)((uintptr_t)mdev->mbase + mbox->rx_start);
+ if (!req_hdr->num_msgs)
+ return 0;
+
+ offset = mbox->rx_start + PLT_ALIGN(sizeof(*req_hdr), MBOX_MSG_ALIGN);
+
+ for (i = 0; i < req_hdr->num_msgs; i++) {
+ msg = (struct mbox_msghdr *)((uintptr_t)mdev->mbase + offset);
+ size = mbox->rx_start + msg->next_msgoff - offset;
+
+ /* RVU_PF_FUNC_S */
+ msg->pcifunc = dev_pf_func(dev->pf, vf);
+
+ if (msg->id == MBOX_MSG_READY) {
+ struct ready_msg_rsp *rsp;
+ uint16_t max_bits = sizeof(dev->active_vfs[0]) * 8;
+
+ /* Handle READY message in PF */
+ dev->active_vfs[vf / max_bits] |=
+ BIT_ULL(vf % max_bits);
+ rsp = (struct ready_msg_rsp *)mbox_alloc_msg(
+ mbox, vf, sizeof(*rsp));
+ mbox_rsp_init(msg->id, rsp);
+
+ /* PF/VF function ID */
+ rsp->hdr.pcifunc = msg->pcifunc;
+ rsp->hdr.rc = 0;
+ } else {
+ struct mbox_msghdr *af_req;
+ /* Reserve AF/PF mbox message */
+ size = PLT_ALIGN(size, MBOX_MSG_ALIGN);
+ af_req = mbox_alloc_msg(dev->mbox, 0, size);
+ if (af_req == NULL)
+ return -ENOSPC;
+ mbox_req_init(msg->id, af_req);
+
+ /* Copy message from VF<->PF mbox to PF<->AF mbox */
+ mbox_memcpy((uint8_t *)af_req +
+ sizeof(struct mbox_msghdr),
+ (uint8_t *)msg + sizeof(struct mbox_msghdr),
+ size - sizeof(struct mbox_msghdr));
+ af_req->pcifunc = msg->pcifunc;
+ routed++;
+ }
+ offset = mbox->rx_start + msg->next_msgoff;
+ }
+
+ if (routed > 0) {
+ plt_base_dbg("pf:%d routed %d messages from vf:%d to AF",
+ dev->pf, routed, vf);
+ af_pf_wait_msg(dev, vf, routed);
+ mbox_reset(dev->mbox, 0);
+ }
+
+ /* Send mbox responses to VF */
+ if (mdev->num_msgs) {
+ plt_base_dbg("pf:%d reply %d messages to vf:%d", dev->pf,
+ mdev->num_msgs, vf);
+ mbox_msg_send(mbox, vf);
+ }
+
+ return i;
+}
+
+static int
+vf_pf_process_up_msgs(struct dev *dev, uint16_t vf)
+{
+ struct mbox *mbox = &dev->mbox_vfpf_up;
+ struct mbox_dev *mdev = &mbox->dev[vf];
+ struct mbox_hdr *req_hdr;
+ struct mbox_msghdr *msg;
+ int msgs_acked = 0;
+ int offset;
+ uint16_t i;
+
+ req_hdr = (struct mbox_hdr *)((uintptr_t)mdev->mbase + mbox->rx_start);
+ if (req_hdr->num_msgs == 0)
+ return 0;
+
+ offset = mbox->rx_start + PLT_ALIGN(sizeof(*req_hdr), MBOX_MSG_ALIGN);
+
+ for (i = 0; i < req_hdr->num_msgs; i++) {
+ msg = (struct mbox_msghdr *)((uintptr_t)mdev->mbase + offset);
+
+ msgs_acked++;
+ /* RVU_PF_FUNC_S */
+ msg->pcifunc = dev_pf_func(dev->pf, vf);
+
+ switch (msg->id) {
+ case MBOX_MSG_CGX_LINK_EVENT:
+ plt_base_dbg("PF: Msg 0x%x (%s) fn:0x%x (pf:%d,vf:%d)",
+ msg->id, mbox_id2name(msg->id),
+ msg->pcifunc, dev_get_pf(msg->pcifunc),
+ dev_get_vf(msg->pcifunc));
+ break;
+ case MBOX_MSG_CGX_PTP_RX_INFO:
+ plt_base_dbg("PF: Msg 0x%x (%s) fn:0x%x (pf:%d,vf:%d)",
+ msg->id, mbox_id2name(msg->id),
+ msg->pcifunc, dev_get_pf(msg->pcifunc),
+ dev_get_vf(msg->pcifunc));
+ break;
+ default:
+ plt_err("Not handled UP msg 0x%x (%s) func:0x%x",
+ msg->id, mbox_id2name(msg->id), msg->pcifunc);
+ }
+ offset = mbox->rx_start + msg->next_msgoff;
+ }
+ mbox_reset(mbox, vf);
+ mdev->msgs_acked = msgs_acked;
+ plt_wmb();
+
+ return i;
+}
+
+static void
+roc_vf_pf_mbox_handle_msg(void *param)
+{
+ uint16_t vf, max_vf, max_bits;
+ struct dev *dev = param;
+
+ max_bits = sizeof(dev->intr.bits[0]) * sizeof(uint64_t);
+ max_vf = max_bits * MAX_VFPF_DWORD_BITS;
+
+ for (vf = 0; vf < max_vf; vf++) {
+ if (dev->intr.bits[vf / max_bits] & BIT_ULL(vf % max_bits)) {
+ plt_base_dbg("Process vf:%d request (pf:%d, vf:%d)", vf,
+ dev->pf, dev->vf);
+ vf_pf_process_msgs(dev, vf);
+ /* UP messages */
+ vf_pf_process_up_msgs(dev, vf);
+ dev->intr.bits[vf / max_bits] &=
+ ~(BIT_ULL(vf % max_bits));
+ }
+ }
+ dev->timer_set = 0;
+}
+
+static void
+roc_vf_pf_mbox_irq(void *param)
+{
+ struct dev *dev = param;
+ bool alarm_set = false;
+ uint64_t intr;
+ int vfpf;
+
+ for (vfpf = 0; vfpf < MAX_VFPF_DWORD_BITS; ++vfpf) {
+ intr = plt_read64(dev->bar2 + RVU_PF_VFPF_MBOX_INTX(vfpf));
+ if (!intr)
+ continue;
+
+ plt_base_dbg("vfpf: %d intr: 0x%" PRIx64 " (pf:%d, vf:%d)",
+ vfpf, intr, dev->pf, dev->vf);
+
+ /* Save and clear intr bits */
+ dev->intr.bits[vfpf] |= intr;
+ plt_write64(intr, dev->bar2 + RVU_PF_VFPF_MBOX_INTX(vfpf));
+ alarm_set = true;
+ }
+
+ if (!dev->timer_set && alarm_set) {
+ dev->timer_set = 1;
+ /* Start timer to handle messages */
+ plt_alarm_set(VF_PF_MBOX_TIMER_MS, roc_vf_pf_mbox_handle_msg,
+ dev);
+ }
+}
+