// SPDX-License-Identifier: GPL-2.0
/* Marvell Octeon EP (EndPoint) Ethernet Driver
*
* Copyright (C) 2020 Marvell.
*
*/
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mutex.h>
#include <linux/jiffies.h>
#include <linux/sched.h>
#include <linux/sched/signal.h>
#include <linux/io.h>
#include <linux/pci.h>
#include <linux/etherdevice.h>
#include <linux/vmalloc.h>
#include "octep_config.h"
#include "octep_main.h"
#include "octep_pfvf_mbox.h"
#include "octep_ctrl_net.h"
/* When a new command is implemented, the below table should be updated
* with new command and it's version info.
*/
static u32 pfvf_cmd_versions[OCTEP_PFVF_MBOX_CMD_MAX] = {
[0 ... OCTEP_PFVF_MBOX_CMD_DEV_REMOVE] = OCTEP_PFVF_MBOX_VERSION_V1,
[OCTEP_PFVF_MBOX_CMD_GET_FW_INFO ... OCTEP_PFVF_MBOX_NOTIF_LINK_STATUS] =
OCTEP_PFVF_MBOX_VERSION_V2
};
static void octep_pfvf_validate_version(struct octep_device *oct, u32 vf_id,
union octep_pfvf_mbox_word cmd,
union octep_pfvf_mbox_word *rsp)
{
u32 vf_version = (u32)cmd.s_version.version;
dev_dbg(&oct->pdev->dev, "VF id:%d VF version:%d PF version:%d\n",
vf_id, vf_version, OCTEP_PFVF_MBOX_VERSION_CURRENT);
if (vf_version < OCTEP_PFVF_MBOX_VERSION_CURRENT)
rsp->s_version.version = vf_version;
else
rsp->s_version.version = OCTEP_PFVF_MBOX_VERSION_CURRENT;
oct->vf_info[vf_id].mbox_version = rsp->s_version.version;
dev_dbg(&oct->pdev->dev, "VF id:%d negotiated VF version:%d\n",
vf_id, oct->vf_info[vf_id].mbox_version);
rsp->s_version.type = OCTEP_PFVF_MBOX_TYPE_RSP_ACK;
}
static void octep_pfvf_get_link_status(struct octep_device *oct, u32 vf_id,
union octep_pfvf_mbox_word cmd,
union octep_pfvf_mbox_word *rsp)
{
int status;
status = octep_ctrl_net_get_link_status(oct, vf_id);
if (status < 0) {
rsp->s_link_status.type = OCTEP_PFVF_MBOX_TYPE_RSP_NACK;
dev_err(&oct->pdev->dev, "Get VF link status failed via host control Mbox\n");
return;
}
rsp->s_link_status.type = OCTEP_PFVF_MBOX_TYPE_RSP_ACK;
rsp->s_link_status.status = status;
}
static void octep_pfvf_set_link_status(struct octep_device *oct, u32 vf_id,
union octep_pfvf_mbox_word cmd,
union octep_pfvf_mbox_word *rsp)
{
int err;
err = octep_ctrl_net_set_link_status(oct, vf_id, cmd.s_link_status.status, true);
if (err) {
rsp->s_link_status.type = OCTEP_PFVF_MBOX_TYPE_RSP_NACK;
dev_err(&oct->pdev->dev, "Set VF link status failed via host control Mbox\n");
return;
}
rsp->s_link_status.type = OCTEP_PFVF_MBOX_TYPE_RSP_ACK;
}
static void octep_pfvf_set_rx_state(struct octep_device *oct, u32 vf_id,
union octep_pfvf_mbox_word cmd,
union octep_pfvf_mbox_word *rsp)
{
int err;
err = octep_ctrl_net_set_rx_state(oct, vf_id, cmd.s_link_state.state, true);
if (err) {
rsp->s_link_state.type = OCTEP_PFVF_MBOX_TYPE_RSP_NACK;
dev_err(&oct->pdev->dev, "Set VF Rx link state failed via host control Mbox\n");
return;
}
rsp->s_link_state.type = OCTEP_PFVF_MBOX_TYPE_RSP_ACK;
}
static int octep_send_notification(struct octep_device *oct, u32 vf_id,
union octep_pfvf_mbox_word cmd)
{
u32 max_rings_per_vf, vf_mbox_queue;
struct octep_mbox *mbox;
/* check if VF PF Mailbox is compatible for this notification */
if (pfvf_cmd_versions[cmd.s.opcode] > oct->vf_info[vf_id].mbox_version) {
dev_dbg(&oct->pdev->dev, "VF Mbox doesn't support Notification:%d on VF ver:%d\n",
cmd.s.opcode, oct->vf_info[vf_id].mbox_version);
return -EOPNOTSUPP;
}
max_rings_per_vf = CFG_GET_MAX_RPVF(oct->conf);
vf_mbox_queue = vf_id * max_rings_per_vf;
if (!oct->mbox[vf_mbox_queue]) {
dev_err(&oct->pdev->dev, "Notif obtained for bad mbox vf %d\n", vf_id);
return -EINVAL;
}
mbox = oct->mbox[vf_mbox_queue];
mutex_lock(&mbox->lock);
writeq(cmd.u64, mbox->pf_vf_data_reg);
mutex_unlock(&mbox->lock);
return 0;
}
static void octep_pfvf_set_mtu(struct octep_device *oct, u32 vf_id,
union octep_pfvf_mbox_word cmd,
union octep_pfvf_mbox_word *rsp)
{
int err;
err = octep_ctrl_net_set_mtu(oct, vf_id, cmd.s_set_mtu.mtu, true);
if (err) {
rsp->s_set_mtu.type = OCTEP_PFVF_MBOX_TYPE_RSP_NACK;
dev_err(&oct->pdev->dev, "Set VF MTU failed via host control Mbox\n");
return;
}
rsp->s_set_mtu.type = OCTEP_PFVF_MBOX_TYPE_RSP_ACK;
}
static void octep_pfvf_get_mtu(struct octep_device *oct, u32 vf_id,
union octep_pfvf_mbox_word cmd,
union octep_pfvf_mbox_word *rsp)
{
int max_rx_pktlen = oct->netdev->max_mtu + (ETH_HLEN + ETH_FCS_LEN);
rsp->s_set_mtu.type = OCTEP_PFVF_MBOX_TYPE_RSP_ACK;
rsp->s_get_mtu.mtu = max_rx_pktlen;
}
static void octep_pfvf_set_mac_addr(struct octep_device *oct, u32 vf_id,
union octep_pfvf_mbox_word cmd,
union octep_pfvf_mbox_word *rsp)
{
int err;
err = octep_ctrl_net_set_mac_addr(oct, vf_id, cmd.s_set_mac.mac_addr, true);
if (err) {
rsp->s_set_mac.type = OCTEP_PFVF_MBOX_TYPE_RSP_NACK;
dev_err(&oct->pdev->dev, "Set VF MAC address failed via host control Mbox\n");
return;
}
rsp->s_set_mac.type = OCTEP_PFVF_MBOX_TYPE_RSP_ACK;
}
static void octep_pfvf_get_mac_addr(struct octep_device *oct, u32 vf_id,
union octep_pfvf_mbox_word cmd,
union octep_pfvf_mbox_word *rsp)
{
int err;
err = octep_ctrl_net_get_mac_addr(oct, vf_id, rsp->s_set_mac.mac_addr);
if (err) {
rsp->s_set_mac.type = OCTEP_PFVF_MBOX_TYPE_RSP_NACK;
dev_err(&oct->pdev->dev, "Get VF MAC address failed via host control Mbox\n");
return;
}
rsp->s_set_mac.type = OCTEP_PFVF_MBOX_TYPE_RSP_ACK;
}
static void octep_pfvf_dev_remove(struct octep_device *oct, u32 vf_id,
union octep_pfvf_mbox_word cmd,
union octep_pfvf_mbox_word *rsp)
{
int err;
err = octep_ctrl_net_dev_remove(oct, vf_id);
if (err) {
rsp->s.type = OCTEP_PFVF_MBOX_TYPE_RSP_NACK;
dev_err(&oct->pdev->dev, "Failed to acknowledge fw of vf %d removal\n",
vf_id);
return;
}
rsp->s.type = OCTEP_PFVF_MBOX_TYPE_RSP_ACK;
}
static void octep_pfvf_get_fw_info(struct octep_device *oct, u32 vf_id,
union octep_pfvf_mbox_word cmd,
union octep_pfvf_mbox_word *rsp)
{
struct octep_fw_info fw_info;
int err;
err = octep_ctrl_net_get_info(oct, vf_id, &fw_info);
if (err) {
rsp->s_fw_info.type = OCTEP_PFVF_MBOX_TYPE_RSP_NACK;
dev_err(&oct->pdev->dev, "Get VF info failed via host control Mbox\n");
return;
}
rsp->s_fw_info.pkind = fw_info.pkind;
rsp->s_fw_info.fsz = fw_info.fsz;
rsp->s_fw_info.rx_ol_flags = fw_info.rx_ol_flags;
rsp->s_fw_info.tx_ol_flags = fw_info.tx_ol_flags;
rsp->s_fw_info.type = OCTEP_PFVF_MBOX_TYPE_RSP_ACK;
}
static void octep_pfvf_set_offloads(struct octep_device *oct, u32 vf_id,
union octep_pfvf_mbox_word cmd,
union octep_pfvf_mbox_word *rsp)
{
struct octep_ctrl_net_offloads offloads = {
.rx_offloads = cmd.s_offloads.rx_ol_flags,
.tx_offloads = cmd.s_offloads.tx_ol_flags
};
int err;
err = octep_ctrl_net_set_offloads(oct, vf_id, &offloads, true);
if (err) {
rsp->s_offloads.type = OCTEP_PFVF_MBOX_TYPE_RSP_NACK;
dev_err(&oct->pdev->dev, "Set VF offloads failed via host control Mbox\n");
return;
}
rsp->s_offloads.type = OCTEP_PFVF_MBOX_TYPE_RSP_ACK;
}
int octep_setup_pfvf_mbox(struct octep_device *oct)
{
int i = 0, num_vfs = 0, rings_per_vf = 0;
int ring = 0;
num_vfs = oct->conf->sriov_cfg.active_vfs;
rings_per_vf = oct->conf->sriov_cfg.max_rings_per_vf;
for (i = 0; i < num_vfs; i++) {
ring = rings_per_vf * i;
oct->mbox[ring] = vzalloc(sizeof(*oct->mbox[ring]));
if (!oct->mbox[ring])
goto free_mbox;
memset(oct->mbox[ring], 0, sizeof(struct octep_mbox));
memset(&oct->vf_info[i], 0, sizeof(struct octep_pfvf_info));
mutex_init(&oct->mbox[ring]->lock);
INIT_WORK(&oct->mbox[ring]->wk.work, octep_pfvf_mbox_work);
oct->mbox[ring]->wk.ctxptr = oct->mbox[ring];
oct->mbox[ring]->oct = oct;
oct->mbox[ring]->vf_id = i;
oct->hw_ops.setup_mbox_regs(oct, ring);
}
return 0;
free_mbox:
while (i) {
i--;
ring = rings_per_vf * i;
cancel_work_sync(&oct->mbox[ring]->wk.work);
mutex_destroy(&oct->mbox[ring]->lock);
vfree(oct->mbox[ring]);
oct->mbox[ring] = NULL;
}
return -ENOMEM;
}
void octep_delete_pfvf_mbox(struct octep_device *oct)
{
int rings_per_vf = oct->conf->sriov_cfg.max_rings_per_vf;
int num_vfs = oct->conf->sriov_cfg.active_vfs;
int i = 0, ring = 0, vf_srn = 0;
for (i = 0; i < num_vfs; i++) {
ring = vf_srn + rings_per_vf * i;
if (!oct->mbox[ring])
continue;
if (work_pending(&oct->mbox[ring]->wk.work))
cancel_work_sync(&oct->mbox[ring]->wk.work);
mutex_destroy(&oct->mbox[ring]->lock);
vfree(oct->mbox[ring]);
oct->mbox[ring] = NULL;
}
}
static void octep_pfvf_pf_get_data(struct octep_device *oct,
struct octep_mbox *mbox, int vf_id,
union octep_pfvf_mbox_word cmd,
union octep_pfvf_mbox_word *rsp)
{
int length = 0;
int i = 0;
int err;
struct octep_iface_link_info link_info;
struct octep_iface_rx_stats rx_stats;
struct octep_iface_tx_stats tx_stats;
rsp->s_data.type = OCTEP_PFVF_MBOX_TYPE_RSP_ACK;
if (cmd.s_data.frag != OCTEP_PFVF_MBOX_MORE_FRAG_FLAG) {
mbox->config_data_index = 0;
memset(mbox->config_data, 0, MAX_VF_PF_MBOX_DATA_SIZE);
/* Based on the OPCODE CMD the PF driver
* specific API should be called to fetch
* the requested data
*/
switch (cmd.s.opcode) {
case OCTEP_PFVF_MBOX_CMD_GET_LINK_INFO:
memset(&link_info, 0, sizeof(link_info));
err = octep_ctrl_net_get_link_info(oct, vf_id, &link_info);
if (!err) {
mbox->message_len = sizeof(link_info);
*((int32_t *)rsp->s_data.data) = mbox->message_len;
memcpy(mbox->config_data, (u8 *)&link_info, sizeof(link_info));
} else {
rsp->s_data.type = OCTEP_PFVF_MBOX_TYPE_RSP_NACK;
return;
}
break;
case OCTEP_PFVF_MBOX_CMD_GET_STATS:
memset(&rx_stats, 0, sizeof(rx_stats));
memset(&tx_stats, 0, sizeof(tx_stats));
err = octep_ctrl_net_get_if_stats(oct, vf_id, &rx_stats, &tx_stats);
if (!err) {
mbox->message_len = sizeof(rx_stats) + sizeof(tx_stats);
*((int32_t *)rsp->s_data.data) = mbox->message_len;
memcpy(mbox->config_data, (u8 *)&rx_stats, sizeof(rx_stats));
memcpy(mbox->config_data + sizeof(rx_stats), (u8 *)&tx_stats,
sizeof(tx_stats));
} else {
rsp->s_data.type = OCTEP_PFVF_MBOX_TYPE_RSP_NACK;
return;
}
break;
}
*((int32_t *)rsp->s_data.data) = mbox->message_len;
return;
}
if (mbox->message_len > OCTEP_PFVF_MBOX_MAX_DATA_SIZE)
length = OCTEP_PFVF_MBOX_MAX_DATA_SIZE;
else
length = mbox->message_len;
mbox->message_len -= length;
for (i = 0; i < length; i++) {
rsp->s_data.data[i] =
mbox->config_data[mbox->config_data_index];
mbox->config_data_index++;
}
}
void octep_pfvf_notify(struct octep_device *oct, struct octep_ctrl_mbox_msg *msg)
{
union octep_pfvf_mbox_word notif = { 0 };
struct octep_ctrl_net_f2h_req *req;
req = (struct octep_ctrl_net_f2h_req *)msg->sg_list[0].msg;
switch (req->hdr.s.cmd) {
case OCTEP_CTRL_NET_F2H_CMD_LINK_STATUS:
notif.s_link_status.opcode = OCTEP_PFVF_MBOX_NOTIF_LINK_STATUS;
notif.s_link_status.status = req->link.state;
break;
default:
pr_info("Unknown mbox notif for vf: %u\n",
req->hdr.s.cmd);
return;
}
notif.s.type = OCTEP_PFVF_MBOX_TYPE_CMD;
octep_send_notification(oct, msg->hdr.s.vf_idx, notif);
}
void octep_pfvf_mbox_work(struct work_struct *work)
{
struct octep_pfvf_mbox_wk *wk = container_of(work, struct octep_pfvf_mbox_wk, work);
union octep_pfvf_mbox_word cmd = { 0 };
union octep_pfvf_mbox_word rsp = { 0 };
struct octep_mbox *mbox = NULL;
struct octep_device *oct = NULL;
int vf_id;
mbox = (struct octep_mbox *)wk->ctxptr;
oct = (struct octep_device *)mbox->oct;
vf_id = mbox->vf_id;
mutex_lock(&mbox->lock);
cmd.u64 = readq(mbox->vf_pf_data_reg);
rsp.u64 = 0;
switch (cmd.s.opcode) {
case OCTEP_PFVF_MBOX_CMD_VERSION:
octep_pfvf_validate_version(oct, vf_id, cmd, &rsp);
break;
case OCTEP_PFVF_MBOX_CMD_GET_LINK_STATUS:
octep_pfvf_get_link_status(oct, vf_id, cmd, &rsp);
break;
case OCTEP_PFVF_MBOX_CMD_SET_LINK_STATUS:
octep_pfvf_set_link_status(oct, vf_id, cmd, &rsp);
break;
case OCTEP_PFVF_MBOX_CMD_SET_RX_STATE:
octep_pfvf_set_rx_state(oct, vf_id, cmd, &rsp);
break;
case OCTEP_PFVF_MBOX_CMD_SET_MTU:
octep_pfvf_set_mtu(oct, vf_id, cmd, &rsp);
break;
case OCTEP_PFVF_MBOX_CMD_SET_MAC_ADDR:
octep_pfvf_set_mac_addr(oct, vf_id, cmd, &rsp);
break;
case OCTEP_PFVF_MBOX_CMD_GET_MAC_ADDR:
octep_pfvf_get_mac_addr(oct, vf_id, cmd, &rsp);
break;
case OCTEP_PFVF_MBOX_CMD_GET_LINK_INFO:
case OCTEP_PFVF_MBOX_CMD_GET_STATS:
octep_pfvf_pf_get_data(oct, mbox, vf_id, cmd, &rsp);
break;
case OCTEP_PFVF_MBOX_CMD_GET_MTU:
octep_pfvf_get_mtu(oct, vf_id, cmd, &rsp);
break;
case OCTEP_PFVF_MBOX_CMD_DEV_REMOVE:
octep_pfvf_dev_remove(oct, vf_id, cmd, &rsp);
break;
case OCTEP_PFVF_MBOX_CMD_GET_FW_INFO:
octep_pfvf_get_fw_info(oct, vf_id, cmd, &rsp);
break;
case OCTEP_PFVF_MBOX_CMD_SET_OFFLOADS:
octep_pfvf_set_offloads(oct, vf_id, cmd, &rsp);
break;
default:
dev_err(&oct->pdev->dev, "PF-VF mailbox: invalid opcode %d\n", cmd.s.opcode);
rsp.s.type = OCTEP_PFVF_MBOX_TYPE_RSP_NACK;
break;
}
writeq(rsp.u64, mbox->vf_pf_data_reg);
mutex_unlock(&mbox->lock);
}
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