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// SPDX-License-Identifier: GPL-2.0
/* Marvell OcteonTX CPT driver
*
* Copyright (C) 2019 Marvell International Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include "otx_cpt_common.h"
#include "otx_cptpf.h"
static char *get_mbox_opcode_str(int msg_opcode)
{
char *str = "Unknown";
switch (msg_opcode) {
case OTX_CPT_MSG_VF_UP:
str = "UP";
break;
case OTX_CPT_MSG_VF_DOWN:
str = "DOWN";
break;
case OTX_CPT_MSG_READY:
str = "READY";
break;
case OTX_CPT_MSG_QLEN:
str = "QLEN";
break;
case OTX_CPT_MSG_QBIND_GRP:
str = "QBIND_GRP";
break;
case OTX_CPT_MSG_VQ_PRIORITY:
str = "VQ_PRIORITY";
break;
case OTX_CPT_MSG_PF_TYPE:
str = "PF_TYPE";
break;
case OTX_CPT_MSG_ACK:
str = "ACK";
break;
case OTX_CPT_MSG_NACK:
str = "NACK";
break;
}
return str;
}
static void dump_mbox_msg(struct otx_cpt_mbox *mbox_msg, int vf_id)
{
char raw_data_str[OTX_CPT_MAX_MBOX_DATA_STR_SIZE];
hex_dump_to_buffer(mbox_msg, sizeof(struct otx_cpt_mbox), 16, 8,
raw_data_str, OTX_CPT_MAX_MBOX_DATA_STR_SIZE, false);
if (vf_id >= 0)
pr_debug("MBOX opcode %s received from VF%d raw_data %s",
get_mbox_opcode_str(mbox_msg->msg), vf_id,
raw_data_str);
else
pr_debug("MBOX opcode %s received from PF raw_data %s",
get_mbox_opcode_str(mbox_msg->msg), raw_data_str);
}
static void otx_cpt_send_msg_to_vf(struct otx_cpt_device *cpt, int vf,
struct otx_cpt_mbox *mbx)
{
/* Writing mbox(0) causes interrupt */
writeq(mbx->data, cpt->reg_base + OTX_CPT_PF_VFX_MBOXX(vf, 1));
writeq(mbx->msg, cpt->reg_base + OTX_CPT_PF_VFX_MBOXX(vf, 0));
}
/*
* ACKs VF's mailbox message
* @vf: VF to which ACK to be sent
*/
static void otx_cpt_mbox_send_ack(struct otx_cpt_device *cpt, int vf,
struct otx_cpt_mbox *mbx)
{
mbx->data = 0ull;
mbx->msg = OTX_CPT_MSG_ACK;
otx_cpt_send_msg_to_vf(cpt, vf, mbx);
}
/* NACKs VF's mailbox message that PF is not able to complete the action */
static void otx_cptpf_mbox_send_nack(struct otx_cpt_device *cpt, int vf,
struct otx_cpt_mbox *mbx)
{
mbx->data = 0ull;
mbx->msg = OTX_CPT_MSG_NACK;
otx_cpt_send_msg_to_vf(cpt, vf, mbx);
}
static void otx_cpt_clear_mbox_intr(struct otx_cpt_device *cpt, u32 vf)
{
/* W1C for the VF */
writeq(1ull << vf, cpt->reg_base + OTX_CPT_PF_MBOX_INTX(0));
}
/*
* Configure QLEN/Chunk sizes for VF
*/
static void otx_cpt_cfg_qlen_for_vf(struct otx_cpt_device *cpt, int vf,
u32 size)
{
union otx_cptx_pf_qx_ctl pf_qx_ctl;
pf_qx_ctl.u = readq(cpt->reg_base + OTX_CPT_PF_QX_CTL(vf));
pf_qx_ctl.s.size = size;
pf_qx_ctl.s.cont_err = true;
writeq(pf_qx_ctl.u, cpt->reg_base + OTX_CPT_PF_QX_CTL(vf));
}
/*
* Configure VQ priority
*/
static void otx_cpt_cfg_vq_priority(struct otx_cpt_device *cpt, int vf, u32 pri)
{
union otx_cptx_pf_qx_ctl pf_qx_ctl;
pf_qx_ctl.u = readq(cpt->reg_base + OTX_CPT_PF_QX_CTL(vf));
pf_qx_ctl.s.pri = pri;
writeq(pf_qx_ctl.u, cpt->reg_base + OTX_CPT_PF_QX_CTL(vf));
}
static int otx_cpt_bind_vq_to_grp(struct otx_cpt_device *cpt, u8 q, u8 grp)
{
struct device *dev = &cpt->pdev->dev;
struct otx_cpt_eng_grp_info *eng_grp;
union otx_cptx_pf_qx_ctl pf_qx_ctl;
struct otx_cpt_ucode *ucode;
if (q >= cpt->max_vfs) {
dev_err(dev, "Requested queue %d is > than maximum avail %d",
q, cpt->max_vfs);
return -EINVAL;
}
if (grp >= OTX_CPT_MAX_ENGINE_GROUPS) {
dev_err(dev, "Requested group %d is > than maximum avail %d",
grp, OTX_CPT_MAX_ENGINE_GROUPS);
return -EINVAL;
}
eng_grp = &cpt->eng_grps.grp[grp];
if (!eng_grp->is_enabled) {
dev_err(dev, "Requested engine group %d is disabled", grp);
return -EINVAL;
}
pf_qx_ctl.u = readq(cpt->reg_base + OTX_CPT_PF_QX_CTL(q));
pf_qx_ctl.s.grp = grp;
writeq(pf_qx_ctl.u, cpt->reg_base + OTX_CPT_PF_QX_CTL(q));
if (eng_grp->mirror.is_ena)
ucode = &eng_grp->g->grp[eng_grp->mirror.idx].ucode[0];
else
ucode = &eng_grp->ucode[0];
if (otx_cpt_uc_supports_eng_type(ucode, OTX_CPT_SE_TYPES))
return OTX_CPT_SE_TYPES;
else if (otx_cpt_uc_supports_eng_type(ucode, OTX_CPT_AE_TYPES))
return OTX_CPT_AE_TYPES;
else
return BAD_OTX_CPTVF_TYPE;
}
/* Interrupt handler to handle mailbox messages from VFs */
static void otx_cpt_handle_mbox_intr(struct otx_cpt_device *cpt, int vf)
{
int vftype = 0;
struct otx_cpt_mbox mbx = {};
struct device *dev = &cpt->pdev->dev;
/*
* MBOX[0] contains msg
* MBOX[1] contains data
*/
mbx.msg = readq(cpt->reg_base + OTX_CPT_PF_VFX_MBOXX(vf, 0));
mbx.data = readq(cpt->reg_base + OTX_CPT_PF_VFX_MBOXX(vf, 1));
dump_mbox_msg(&mbx, vf);
switch (mbx.msg) {
case OTX_CPT_MSG_VF_UP:
mbx.msg = OTX_CPT_MSG_VF_UP;
mbx.data = cpt->vfs_enabled;
otx_cpt_send_msg_to_vf(cpt, vf, &mbx);
break;
case OTX_CPT_MSG_READY:
mbx.msg = OTX_CPT_MSG_READY;
mbx.data = vf;
otx_cpt_send_msg_to_vf(cpt, vf, &mbx);
break;
case OTX_CPT_MSG_VF_DOWN:
/* First msg in VF teardown sequence */
otx_cpt_mbox_send_ack(cpt, vf, &mbx);
break;
case OTX_CPT_MSG_QLEN:
otx_cpt_cfg_qlen_for_vf(cpt, vf, mbx.data);
otx_cpt_mbox_send_ack(cpt, vf, &mbx);
break;
case OTX_CPT_MSG_QBIND_GRP:
vftype = otx_cpt_bind_vq_to_grp(cpt, vf, (u8)mbx.data);
if ((vftype != OTX_CPT_AE_TYPES) &&
(vftype != OTX_CPT_SE_TYPES)) {
dev_err(dev, "VF%d binding to eng group %llu failed",
vf, mbx.data);
otx_cptpf_mbox_send_nack(cpt, vf, &mbx);
} else {
mbx.msg = OTX_CPT_MSG_QBIND_GRP;
mbx.data = vftype;
otx_cpt_send_msg_to_vf(cpt, vf, &mbx);
}
break;
case OTX_CPT_MSG_PF_TYPE:
mbx.msg = OTX_CPT_MSG_PF_TYPE;
mbx.data = cpt->pf_type;
otx_cpt_send_msg_to_vf(cpt, vf, &mbx);
break;
case OTX_CPT_MSG_VQ_PRIORITY:
otx_cpt_cfg_vq_priority(cpt, vf, mbx.data);
otx_cpt_mbox_send_ack(cpt, vf, &mbx);
break;
default:
dev_err(&cpt->pdev->dev, "Invalid msg from VF%d, msg 0x%llx\n",
vf, mbx.msg);
break;
}
}
void otx_cpt_mbox_intr_handler (struct otx_cpt_device *cpt, int mbx)
{
u64 intr;
u8 vf;
intr = readq(cpt->reg_base + OTX_CPT_PF_MBOX_INTX(0));
pr_debug("PF interrupt mbox%d mask 0x%llx\n", mbx, intr);
for (vf = 0; vf < cpt->max_vfs; vf++) {
if (intr & (1ULL << vf)) {
otx_cpt_handle_mbox_intr(cpt, vf);
otx_cpt_clear_mbox_intr(cpt, vf);
}
}
}
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