u-boot/drivers/net/octeontx/nicvf_main.c

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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2018 Marvell International Ltd.
*/
#include <dm.h>
#include <malloc.h>
#include <misc.h>
#include <net.h>
#include <pci.h>
#include <pci_ids.h>
#include <phy.h>
#include <asm/io.h>
#include <linux/delay.h>
#include "nic_reg.h"
#include "nic.h"
#include "nicvf_queues.h"
/* Register read/write APIs */
void nicvf_reg_write(struct nicvf *nic, u64 offset, u64 val)
{
writeq(val, nic->reg_base + offset);
}
u64 nicvf_reg_read(struct nicvf *nic, u64 offset)
{
return readq(nic->reg_base + offset);
}
void nicvf_queue_reg_write(struct nicvf *nic, u64 offset,
u64 qidx, u64 val)
{
void *addr = nic->reg_base + offset;
writeq(val, (void *)(addr + (qidx << NIC_Q_NUM_SHIFT)));
}
u64 nicvf_queue_reg_read(struct nicvf *nic, u64 offset, u64 qidx)
{
void *addr = nic->reg_base + offset;
return readq((void *)(addr + (qidx << NIC_Q_NUM_SHIFT)));
}
static void nicvf_handle_mbx_intr(struct nicvf *nic);
/* VF -> PF mailbox communication */
static void nicvf_write_to_mbx(struct nicvf *nic, union nic_mbx *mbx)
{
u64 *msg = (u64 *)mbx;
nicvf_reg_write(nic, NIC_VF_PF_MAILBOX_0_1 + 0, msg[0]);
nicvf_reg_write(nic, NIC_VF_PF_MAILBOX_0_1 + 8, msg[1]);
}
int nicvf_send_msg_to_pf(struct nicvf *nic, union nic_mbx *mbx)
{
int timeout = NIC_PF_VF_MBX_TIMEOUT;
int sleep = 10;
nic->pf_acked = false;
nic->pf_nacked = false;
nicvf_write_to_mbx(nic, mbx);
nic_handle_mbx_intr(nic->nicpf, nic->vf_id);
/* Wait for previous message to be acked, timeout 2sec */
while (!nic->pf_acked) {
if (nic->pf_nacked)
return -1;
mdelay(sleep);
nicvf_handle_mbx_intr(nic);
if (nic->pf_acked)
break;
timeout -= sleep;
if (!timeout) {
printf("PF didn't ack to mbox msg %d from VF%d\n",
(mbx->msg.msg & 0xFF), nic->vf_id);
return -1;
}
}
return 0;
}
/* Checks if VF is able to comminicate with PF
* and also gets the VNIC number this VF is associated to.
*/
static int nicvf_check_pf_ready(struct nicvf *nic)
{
union nic_mbx mbx = {};
mbx.msg.msg = NIC_MBOX_MSG_READY;
if (nicvf_send_msg_to_pf(nic, &mbx)) {
printf("PF didn't respond to READY msg\n");
return 0;
}
return 1;
}
static void nicvf_handle_mbx_intr(struct nicvf *nic)
{
union nic_mbx mbx = {};
struct eth_pdata *pdata = dev_get_plat(nic->dev);
u64 *mbx_data;
u64 mbx_addr;
int i;
mbx_addr = NIC_VF_PF_MAILBOX_0_1;
mbx_data = (u64 *)&mbx;
for (i = 0; i < NIC_PF_VF_MAILBOX_SIZE; i++) {
*mbx_data = nicvf_reg_read(nic, mbx_addr);
mbx_data++;
mbx_addr += sizeof(u64);
}
debug("Mbox message: msg: 0x%x\n", mbx.msg.msg);
switch (mbx.msg.msg) {
case NIC_MBOX_MSG_READY:
nic->pf_acked = true;
nic->vf_id = mbx.nic_cfg.vf_id & 0x7F;
nic->tns_mode = mbx.nic_cfg.tns_mode & 0x7F;
nic->node = mbx.nic_cfg.node_id;
if (!nic->set_mac_pending)
memcpy(pdata->enetaddr,
mbx.nic_cfg.mac_addr, 6);
nic->loopback_supported = mbx.nic_cfg.loopback_supported;
nic->link_up = false;
nic->duplex = 0;
nic->speed = 0;
break;
case NIC_MBOX_MSG_ACK:
nic->pf_acked = true;
break;
case NIC_MBOX_MSG_NACK:
nic->pf_nacked = true;
break;
case NIC_MBOX_MSG_BGX_LINK_CHANGE:
nic->pf_acked = true;
nic->link_up = mbx.link_status.link_up;
nic->duplex = mbx.link_status.duplex;
nic->speed = mbx.link_status.speed;
if (nic->link_up) {
printf("%s: Link is Up %d Mbps %s\n",
nic->dev->name, nic->speed,
nic->duplex == 1 ?
"Full duplex" : "Half duplex");
} else {
printf("%s: Link is Down\n", nic->dev->name);
}
break;
default:
printf("Invalid message from PF, msg 0x%x\n", mbx.msg.msg);
break;
}
nicvf_clear_intr(nic, NICVF_INTR_MBOX, 0);
}
static int nicvf_hw_set_mac_addr(struct nicvf *nic, struct udevice *dev)
{
union nic_mbx mbx = {};
struct eth_pdata *pdata = dev_get_plat(dev);
mbx.mac.msg = NIC_MBOX_MSG_SET_MAC;
mbx.mac.vf_id = nic->vf_id;
memcpy(mbx.mac.mac_addr, pdata->enetaddr, 6);
return nicvf_send_msg_to_pf(nic, &mbx);
}
static void nicvf_config_cpi(struct nicvf *nic)
{
union nic_mbx mbx = {};
mbx.cpi_cfg.msg = NIC_MBOX_MSG_CPI_CFG;
mbx.cpi_cfg.vf_id = nic->vf_id;
mbx.cpi_cfg.cpi_alg = nic->cpi_alg;
mbx.cpi_cfg.rq_cnt = nic->qs->rq_cnt;
nicvf_send_msg_to_pf(nic, &mbx);
}
static int nicvf_init_resources(struct nicvf *nic)
{
int err;
nic->num_qs = 1;
/* Enable Qset */
nicvf_qset_config(nic, true);
/* Initialize queues and HW for data transfer */
err = nicvf_config_data_transfer(nic, true);
if (err) {
printf("Failed to alloc/config VF's QSet resources\n");
return err;
}
return 0;
}
static void nicvf_snd_pkt_handler(struct nicvf *nic,
struct cmp_queue *cq,
void *cq_desc, int cqe_type)
{
struct cqe_send_t *cqe_tx;
struct snd_queue *sq;
struct sq_hdr_subdesc *hdr;
cqe_tx = (struct cqe_send_t *)cq_desc;
sq = &nic->qs->sq[cqe_tx->sq_idx];
hdr = (struct sq_hdr_subdesc *)GET_SQ_DESC(sq, cqe_tx->sqe_ptr);
if (hdr->subdesc_type != SQ_DESC_TYPE_HEADER)
return;
nicvf_check_cqe_tx_errs(nic, cq, cq_desc);
nicvf_put_sq_desc(sq, hdr->subdesc_cnt + 1);
}
static int nicvf_rcv_pkt_handler(struct nicvf *nic,
struct cmp_queue *cq, void *cq_desc,
void **ppkt, int cqe_type)
{
void *pkt;
size_t pkt_len;
struct cqe_rx_t *cqe_rx = (struct cqe_rx_t *)cq_desc;
int err = 0;
/* Check for errors */
err = nicvf_check_cqe_rx_errs(nic, cq, cq_desc);
if (err && !cqe_rx->rb_cnt)
return -1;
pkt = nicvf_get_rcv_pkt(nic, cq_desc, &pkt_len);
if (!pkt) {
debug("Packet not received\n");
return -1;
}
if (pkt)
*ppkt = pkt;
return pkt_len;
}
int nicvf_cq_handler(struct nicvf *nic, void **ppkt, int *pkt_len)
{
int cq_qnum = 0;
int processed_sq_cqe = 0;
int processed_rq_cqe = 0;
int processed_cqe = 0;
unsigned long cqe_count, cqe_head;
struct queue_set *qs = nic->qs;
struct cmp_queue *cq = &qs->cq[cq_qnum];
struct cqe_rx_t *cq_desc;
/* Get num of valid CQ entries expect next one to be SQ completion */
cqe_count = nicvf_queue_reg_read(nic, NIC_QSET_CQ_0_7_STATUS, cq_qnum);
cqe_count &= 0xFFFF;
if (!cqe_count)
return 0;
/* Get head of the valid CQ entries */
cqe_head = nicvf_queue_reg_read(nic, NIC_QSET_CQ_0_7_HEAD, cq_qnum);
cqe_head >>= 9;
cqe_head &= 0xFFFF;
if (cqe_count) {
/* Get the CQ descriptor */
cq_desc = (struct cqe_rx_t *)GET_CQ_DESC(cq, cqe_head);
cqe_head++;
cqe_head &= (cq->dmem.q_len - 1);
/* Initiate prefetch for next descriptor */
prefetch((struct cqe_rx_t *)GET_CQ_DESC(cq, cqe_head));
switch (cq_desc->cqe_type) {
case CQE_TYPE_RX:
debug("%s: Got Rx CQE\n", nic->dev->name);
*pkt_len = nicvf_rcv_pkt_handler(nic, cq, cq_desc,
ppkt, CQE_TYPE_RX);
processed_rq_cqe++;
break;
case CQE_TYPE_SEND:
debug("%s: Got Tx CQE\n", nic->dev->name);
nicvf_snd_pkt_handler(nic, cq, cq_desc, CQE_TYPE_SEND);
processed_sq_cqe++;
break;
default:
debug("%s: Got CQ type %u\n", nic->dev->name,
cq_desc->cqe_type);
break;
}
processed_cqe++;
}
/* Dequeue CQE */
nicvf_queue_reg_write(nic, NIC_QSET_CQ_0_7_DOOR,
cq_qnum, processed_cqe);
asm volatile ("dsb sy");
return (processed_sq_cqe | processed_rq_cqe);
}
/* Qset error interrupt handler
*
* As of now only CQ errors are handled
*/
void nicvf_handle_qs_err(struct nicvf *nic)
{
struct queue_set *qs = nic->qs;
int qidx;
u64 status;
/* Check if it is CQ err */
for (qidx = 0; qidx < qs->cq_cnt; qidx++) {
status = nicvf_queue_reg_read(nic, NIC_QSET_CQ_0_7_STATUS,
qidx);
if (!(status & CQ_ERR_MASK))
continue;
/* Process already queued CQEs and reconfig CQ */
nicvf_sq_disable(nic, qidx);
nicvf_cmp_queue_config(nic, qs, qidx, true);
nicvf_sq_free_used_descs(nic->dev, &qs->sq[qidx], qidx);
nicvf_sq_enable(nic, &qs->sq[qidx], qidx);
}
}
static int nicvf_free_pkt(struct udevice *dev, uchar *pkt, int pkt_len)
{
struct nicvf *nic = dev_get_priv(dev);
if (pkt && pkt_len)
free(pkt);
nicvf_refill_rbdr(nic);
return 0;
}
static int nicvf_xmit(struct udevice *dev, void *pkt, int pkt_len)
{
struct nicvf *nic = dev_get_priv(dev);
int ret = 0;
int rcv_len = 0;
unsigned int timeout = 5000;
void *rpkt = NULL;
if (!nicvf_sq_append_pkt(nic, pkt, pkt_len)) {
printf("VF%d: TX ring full\n", nic->vf_id);
return -1;
}
/* check and update CQ for pkt sent */
while (!ret && timeout--) {
ret = nicvf_cq_handler(nic, &rpkt, &rcv_len);
if (!ret) {
debug("%s: %d, Not sent\n", __func__, __LINE__);
udelay(10);
}
}
return 0;
}
static int nicvf_recv(struct udevice *dev, int flags, uchar **packetp)
{
struct nicvf *nic = dev_get_priv(dev);
void *pkt;
int pkt_len = 0;
#ifdef DEBUG
u8 *dpkt;
int i, j;
#endif
nicvf_cq_handler(nic, &pkt, &pkt_len);
if (pkt_len) {
#ifdef DEBUG
dpkt = pkt;
printf("RX packet contents:\n");
for (i = 0; i < 8; i++) {
puts("\t");
for (j = 0; j < 10; j++)
printf("%02x ", dpkt[i * 10 + j]);
puts("\n");
}
#endif
*packetp = pkt;
}
return pkt_len;
}
void nicvf_stop(struct udevice *dev)
{
struct nicvf *nic = dev_get_priv(dev);
if (!nic->open)
return;
/* Free resources */
nicvf_config_data_transfer(nic, false);
/* Disable HW Qset */
nicvf_qset_config(nic, false);
nic->open = false;
}
int nicvf_open(struct udevice *dev)
{
int err;
struct nicvf *nic = dev_get_priv(dev);
nicvf_hw_set_mac_addr(nic, dev);
/* Configure CPI alorithm */
nic->cpi_alg = CPI_ALG_NONE;
nicvf_config_cpi(nic);
/* Initialize the queues */
err = nicvf_init_resources(nic);
if (err)
return -1;
if (!nicvf_check_pf_ready(nic))
return -1;
nic->open = true;
/* Make sure queue initialization is written */
asm volatile("dsb sy");
return 0;
}
int nicvf_write_hwaddr(struct udevice *dev)
{
unsigned char ethaddr[ARP_HLEN];
struct eth_pdata *pdata = dev_get_plat(dev);
struct nicvf *nic = dev_get_priv(dev);
/* If lower level firmware fails to set proper MAC
* u-boot framework updates MAC to random address.
* Use this hook to update mac address in environment.
*/
if (!eth_env_get_enetaddr_by_index("eth", dev_seq(dev), ethaddr)) {
eth_env_set_enetaddr_by_index("eth", dev_seq(dev),
pdata->enetaddr);
debug("%s: pMAC %pM\n", __func__, pdata->enetaddr);
}
eth_env_get_enetaddr_by_index("eth", dev_seq(dev), ethaddr);
if (memcmp(ethaddr, pdata->enetaddr, ARP_HLEN)) {
debug("%s: pMAC %pM\n", __func__, pdata->enetaddr);
nicvf_hw_set_mac_addr(nic, dev);
}
return 0;
}
static void nicvf_probe_mdio_devices(void)
{
struct udevice *pdev;
int err;
static int probed;
if (probed)
return;
err = dm_pci_find_device(PCI_VENDOR_ID_CAVIUM,
PCI_DEVICE_ID_CAVIUM_SMI, 0,
&pdev);
if (err)
debug("%s couldn't find SMI device\n", __func__);
probed = 1;
}
int nicvf_initialize(struct udevice *dev)
{
struct nicvf *nicvf = dev_get_priv(dev);
struct eth_pdata *pdata = dev_get_plat(dev);
int ret = 0, bgx, lmac;
char name[16];
unsigned char ethaddr[ARP_HLEN];
struct udevice *pfdev;
struct nicpf *pf;
static int vfid;
if (dm_pci_find_device(PCI_VENDOR_ID_CAVIUM,
PCI_DEVICE_ID_CAVIUM_NIC, 0, &pfdev)) {
printf("%s NIC PF device not found..VF probe failed\n",
__func__);
return -1;
}
pf = dev_get_priv(pfdev);
nicvf->vf_id = vfid++;
nicvf->dev = dev;
nicvf->nicpf = pf;
nicvf_probe_mdio_devices();
/* Enable TSO support */
nicvf->hw_tso = true;
nicvf->reg_base = dm_pci_map_bar(dev, PCI_BASE_ADDRESS_0, 0, 0, PCI_REGION_TYPE,
PCI_REGION_MEM);
debug("nicvf->reg_base: %p\n", nicvf->reg_base);
if (!nicvf->reg_base) {
printf("Cannot map config register space, aborting\n");
ret = -1;
goto fail;
}
ret = nicvf_set_qset_resources(nicvf);
if (ret)
return -1;
sprintf(name, "vnic%u", nicvf->vf_id);
debug("%s name %s\n", __func__, name);
device_set_name(dev, name);
bgx = NIC_GET_BGX_FROM_VF_LMAC_MAP(pf->vf_lmac_map[nicvf->vf_id]);
lmac = NIC_GET_LMAC_FROM_VF_LMAC_MAP(pf->vf_lmac_map[nicvf->vf_id]);
debug("%s VF %d BGX %d LMAC %d\n", __func__, nicvf->vf_id, bgx, lmac);
debug("%s PF %p pfdev %p VF %p vfdev %p vf->pdata %p\n",
__func__, nicvf->nicpf, nicvf->nicpf->udev, nicvf, nicvf->dev,
pdata);
fdt_board_get_ethaddr(bgx, lmac, ethaddr);
debug("%s bgx %d lmac %d ethaddr %pM\n", __func__, bgx, lmac, ethaddr);
if (is_valid_ethaddr(ethaddr)) {
memcpy(pdata->enetaddr, ethaddr, ARP_HLEN);
eth_env_set_enetaddr_by_index("eth", dev_seq(dev), ethaddr);
}
debug("%s enetaddr %pM ethaddr %pM\n", __func__,
pdata->enetaddr, ethaddr);
fail:
return ret;
}
int octeontx_vnic_probe(struct udevice *dev)
{
return nicvf_initialize(dev);
}
static const struct eth_ops octeontx_vnic_ops = {
.start = nicvf_open,
.stop = nicvf_stop,
.send = nicvf_xmit,
.recv = nicvf_recv,
.free_pkt = nicvf_free_pkt,
.write_hwaddr = nicvf_write_hwaddr,
};
U_BOOT_DRIVER(octeontx_vnic) = {
.name = "vnic",
.id = UCLASS_ETH,
.probe = octeontx_vnic_probe,
.ops = &octeontx_vnic_ops,
.priv_auto = sizeof(struct nicvf),
.plat_auto = sizeof(struct eth_pdata),
};
static struct pci_device_id octeontx_vnic_supported[] = {
{ PCI_VDEVICE(CAVIUM, PCI_DEVICE_ID_CAVIUM_NICVF) },
{ PCI_VDEVICE(CAVIUM, PCI_DEVICE_ID_CAVIUM_NICVF_1) },
{}
};
U_BOOT_PCI_DEVICE(octeontx_vnic, octeontx_vnic_supported);