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path: root/drivers/crypto/cavium/cpt/cptvf_mbox.c
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Diffstat (limited to 'drivers/crypto/cavium/cpt/cptvf_mbox.c')
-rw-r--r--drivers/crypto/cavium/cpt/cptvf_mbox.c191
1 files changed, 191 insertions, 0 deletions
diff --git a/drivers/crypto/cavium/cpt/cptvf_mbox.c b/drivers/crypto/cavium/cpt/cptvf_mbox.c
new file mode 100644
index 000000000..1267e1eba
--- /dev/null
+++ b/drivers/crypto/cavium/cpt/cptvf_mbox.c
@@ -0,0 +1,191 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2016 Cavium, Inc.
+ */
+
+#include "cptvf.h"
+
+static void cptvf_send_msg_to_pf(struct cpt_vf *cptvf, struct cpt_mbox *mbx)
+{
+ /* Writing mbox(1) causes interrupt */
+ cpt_write_csr64(cptvf->reg_base, CPTX_VFX_PF_MBOXX(0, 0, 0),
+ mbx->msg);
+ cpt_write_csr64(cptvf->reg_base, CPTX_VFX_PF_MBOXX(0, 0, 1),
+ mbx->data);
+}
+
+/* Interrupt handler to handle mailbox messages from VFs */
+void cptvf_handle_mbox_intr(struct cpt_vf *cptvf)
+{
+ struct cpt_mbox mbx = {};
+
+ /*
+ * MBOX[0] contains msg
+ * MBOX[1] contains data
+ */
+ mbx.msg = cpt_read_csr64(cptvf->reg_base, CPTX_VFX_PF_MBOXX(0, 0, 0));
+ mbx.data = cpt_read_csr64(cptvf->reg_base, CPTX_VFX_PF_MBOXX(0, 0, 1));
+ dev_dbg(&cptvf->pdev->dev, "%s: Mailbox msg 0x%llx from PF\n",
+ __func__, mbx.msg);
+ switch (mbx.msg) {
+ case CPT_MSG_READY:
+ {
+ cptvf->pf_acked = true;
+ cptvf->vfid = mbx.data;
+ dev_dbg(&cptvf->pdev->dev, "Received VFID %d\n", cptvf->vfid);
+ break;
+ }
+ case CPT_MSG_QBIND_GRP:
+ cptvf->pf_acked = true;
+ cptvf->vftype = mbx.data;
+ dev_dbg(&cptvf->pdev->dev, "VF %d type %s group %d\n",
+ cptvf->vfid, ((mbx.data == SE_TYPES) ? "SE" : "AE"),
+ cptvf->vfgrp);
+ break;
+ case CPT_MBOX_MSG_TYPE_ACK:
+ cptvf->pf_acked = true;
+ break;
+ case CPT_MBOX_MSG_TYPE_NACK:
+ cptvf->pf_nacked = true;
+ break;
+ default:
+ dev_err(&cptvf->pdev->dev, "Invalid msg from PF, msg 0x%llx\n",
+ mbx.msg);
+ break;
+ }
+}
+
+static int cptvf_send_msg_to_pf_timeout(struct cpt_vf *cptvf,
+ struct cpt_mbox *mbx)
+{
+ int timeout = CPT_MBOX_MSG_TIMEOUT;
+ int sleep = 10;
+
+ cptvf->pf_acked = false;
+ cptvf->pf_nacked = false;
+ cptvf_send_msg_to_pf(cptvf, mbx);
+ /* Wait for previous message to be acked, timeout 2sec */
+ while (!cptvf->pf_acked) {
+ if (cptvf->pf_nacked)
+ return -EINVAL;
+ msleep(sleep);
+ if (cptvf->pf_acked)
+ break;
+ timeout -= sleep;
+ if (!timeout) {
+ dev_err(&cptvf->pdev->dev, "PF didn't ack to mbox msg %llx from VF%u\n",
+ (mbx->msg & 0xFF), cptvf->vfid);
+ return -EBUSY;
+ }
+ }
+
+ return 0;
+}
+
+/*
+ * Checks if VF is able to comminicate with PF
+ * and also gets the CPT number this VF is associated to.
+ */
+int cptvf_check_pf_ready(struct cpt_vf *cptvf)
+{
+ struct pci_dev *pdev = cptvf->pdev;
+ struct cpt_mbox mbx = {};
+
+ mbx.msg = CPT_MSG_READY;
+ if (cptvf_send_msg_to_pf_timeout(cptvf, &mbx)) {
+ dev_err(&pdev->dev, "PF didn't respond to READY msg\n");
+ return -EBUSY;
+ }
+
+ return 0;
+}
+
+/*
+ * Communicate VQs size to PF to program CPT(0)_PF_Q(0-15)_CTL of the VF.
+ * Must be ACKed.
+ */
+int cptvf_send_vq_size_msg(struct cpt_vf *cptvf)
+{
+ struct pci_dev *pdev = cptvf->pdev;
+ struct cpt_mbox mbx = {};
+
+ mbx.msg = CPT_MSG_QLEN;
+ mbx.data = cptvf->qsize;
+ if (cptvf_send_msg_to_pf_timeout(cptvf, &mbx)) {
+ dev_err(&pdev->dev, "PF didn't respond to vq_size msg\n");
+ return -EBUSY;
+ }
+
+ return 0;
+}
+
+/*
+ * Communicate VF group required to PF and get the VQ binded to that group
+ */
+int cptvf_send_vf_to_grp_msg(struct cpt_vf *cptvf)
+{
+ struct pci_dev *pdev = cptvf->pdev;
+ struct cpt_mbox mbx = {};
+
+ mbx.msg = CPT_MSG_QBIND_GRP;
+ /* Convey group of the VF */
+ mbx.data = cptvf->vfgrp;
+ if (cptvf_send_msg_to_pf_timeout(cptvf, &mbx)) {
+ dev_err(&pdev->dev, "PF didn't respond to vf_type msg\n");
+ return -EBUSY;
+ }
+
+ return 0;
+}
+
+/*
+ * Communicate VF group required to PF and get the VQ binded to that group
+ */
+int cptvf_send_vf_priority_msg(struct cpt_vf *cptvf)
+{
+ struct pci_dev *pdev = cptvf->pdev;
+ struct cpt_mbox mbx = {};
+
+ mbx.msg = CPT_MSG_VQ_PRIORITY;
+ /* Convey group of the VF */
+ mbx.data = cptvf->priority;
+ if (cptvf_send_msg_to_pf_timeout(cptvf, &mbx)) {
+ dev_err(&pdev->dev, "PF didn't respond to vf_type msg\n");
+ return -EBUSY;
+ }
+ return 0;
+}
+
+/*
+ * Communicate to PF that VF is UP and running
+ */
+int cptvf_send_vf_up(struct cpt_vf *cptvf)
+{
+ struct pci_dev *pdev = cptvf->pdev;
+ struct cpt_mbox mbx = {};
+
+ mbx.msg = CPT_MSG_VF_UP;
+ if (cptvf_send_msg_to_pf_timeout(cptvf, &mbx)) {
+ dev_err(&pdev->dev, "PF didn't respond to UP msg\n");
+ return -EBUSY;
+ }
+
+ return 0;
+}
+
+/*
+ * Communicate to PF that VF is DOWN and running
+ */
+int cptvf_send_vf_down(struct cpt_vf *cptvf)
+{
+ struct pci_dev *pdev = cptvf->pdev;
+ struct cpt_mbox mbx = {};
+
+ mbx.msg = CPT_MSG_VF_DOWN;
+ if (cptvf_send_msg_to_pf_timeout(cptvf, &mbx)) {
+ dev_err(&pdev->dev, "PF didn't respond to DOWN msg\n");
+ return -EBUSY;
+ }
+
+ return 0;
+}