blob: 1f5facbb89057741837701afb9f75bd90067fa38 [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0+
/* Copyright (c) 2018 Quantenna Communications */
#include <linux/kernel.h>
#include <linux/firmware.h>
#include <linux/pci.h>
#include <linux/vmalloc.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/sched.h>
#include <linux/completion.h>
#include <linux/crc32.h>
#include <linux/spinlock.h>
#include <linux/circ_buf.h>
#include <linux/log2.h>
#include "pcie_priv.h"
#include "pearl_pcie_regs.h"
#include "pearl_pcie_ipc.h"
#include "qtn_hw_ids.h"
#include "core.h"
#include "bus.h"
#include "shm_ipc.h"
#include "debug.h"
#define PEARL_TX_BD_SIZE_DEFAULT 32
struct qtnf_pearl_bda {
__le16 bda_len;
__le16 bda_version;
__le32 bda_pci_endian;
__le32 bda_ep_state;
__le32 bda_rc_state;
__le32 bda_dma_mask;
__le32 bda_msi_addr;
__le32 bda_flashsz;
u8 bda_boardname[PCIE_BDA_NAMELEN];
__le32 bda_rc_msi_enabled;
u8 bda_hhbm_list[PCIE_HHBM_MAX_SIZE];
__le32 bda_dsbw_start_index;
__le32 bda_dsbw_end_index;
__le32 bda_dsbw_total_bytes;
__le32 bda_rc_tx_bd_base;
__le32 bda_rc_tx_bd_num;
u8 bda_pcie_mac[QTN_ENET_ADDR_LENGTH];
struct qtnf_shm_ipc_region bda_shm_reg1 __aligned(4096); /* host TX */
struct qtnf_shm_ipc_region bda_shm_reg2 __aligned(4096); /* host RX */
} __packed;
struct qtnf_pearl_tx_bd {
__le32 addr;
__le32 addr_h;
__le32 info;
__le32 info_h;
} __packed;
struct qtnf_pearl_rx_bd {
__le32 addr;
__le32 addr_h;
__le32 info;
__le32 info_h;
__le32 next_ptr;
__le32 next_ptr_h;
} __packed;
struct qtnf_pearl_fw_hdr {
u8 boardflg[8];
__le32 fwsize;
__le32 seqnum;
__le32 type;
__le32 pktlen;
__le32 crc;
} __packed;
struct qtnf_pcie_pearl_state {
struct qtnf_pcie_bus_priv base;
/* lock for irq configuration changes */
spinlock_t irq_lock;
struct qtnf_pearl_bda __iomem *bda;
void __iomem *pcie_reg_base;
struct qtnf_pearl_tx_bd *tx_bd_vbase;
dma_addr_t tx_bd_pbase;
struct qtnf_pearl_rx_bd *rx_bd_vbase;
dma_addr_t rx_bd_pbase;
dma_addr_t bd_table_paddr;
void *bd_table_vaddr;
u32 bd_table_len;
u32 pcie_irq_mask;
u32 pcie_irq_rx_count;
u32 pcie_irq_tx_count;
u32 pcie_irq_uf_count;
};
static inline void qtnf_init_hdp_irqs(struct qtnf_pcie_pearl_state *ps)
{
unsigned long flags;
spin_lock_irqsave(&ps->irq_lock, flags);
ps->pcie_irq_mask = (PCIE_HDP_INT_RX_BITS | PCIE_HDP_INT_TX_BITS);
spin_unlock_irqrestore(&ps->irq_lock, flags);
}
static inline void qtnf_enable_hdp_irqs(struct qtnf_pcie_pearl_state *ps)
{
unsigned long flags;
spin_lock_irqsave(&ps->irq_lock, flags);
writel(ps->pcie_irq_mask, PCIE_HDP_INT_EN(ps->pcie_reg_base));
spin_unlock_irqrestore(&ps->irq_lock, flags);
}
static inline void qtnf_disable_hdp_irqs(struct qtnf_pcie_pearl_state *ps)
{
unsigned long flags;
spin_lock_irqsave(&ps->irq_lock, flags);
writel(0x0, PCIE_HDP_INT_EN(ps->pcie_reg_base));
spin_unlock_irqrestore(&ps->irq_lock, flags);
}
static inline void qtnf_en_rxdone_irq(struct qtnf_pcie_pearl_state *ps)
{
unsigned long flags;
spin_lock_irqsave(&ps->irq_lock, flags);
ps->pcie_irq_mask |= PCIE_HDP_INT_RX_BITS;
writel(ps->pcie_irq_mask, PCIE_HDP_INT_EN(ps->pcie_reg_base));
spin_unlock_irqrestore(&ps->irq_lock, flags);
}
static inline void qtnf_dis_rxdone_irq(struct qtnf_pcie_pearl_state *ps)
{
unsigned long flags;
spin_lock_irqsave(&ps->irq_lock, flags);
ps->pcie_irq_mask &= ~PCIE_HDP_INT_RX_BITS;
writel(ps->pcie_irq_mask, PCIE_HDP_INT_EN(ps->pcie_reg_base));
spin_unlock_irqrestore(&ps->irq_lock, flags);
}
static inline void qtnf_en_txdone_irq(struct qtnf_pcie_pearl_state *ps)
{
unsigned long flags;
spin_lock_irqsave(&ps->irq_lock, flags);
ps->pcie_irq_mask |= PCIE_HDP_INT_TX_BITS;
writel(ps->pcie_irq_mask, PCIE_HDP_INT_EN(ps->pcie_reg_base));
spin_unlock_irqrestore(&ps->irq_lock, flags);
}
static inline void qtnf_dis_txdone_irq(struct qtnf_pcie_pearl_state *ps)
{
unsigned long flags;
spin_lock_irqsave(&ps->irq_lock, flags);
ps->pcie_irq_mask &= ~PCIE_HDP_INT_TX_BITS;
writel(ps->pcie_irq_mask, PCIE_HDP_INT_EN(ps->pcie_reg_base));
spin_unlock_irqrestore(&ps->irq_lock, flags);
}
static void qtnf_deassert_intx(struct qtnf_pcie_pearl_state *ps)
{
void __iomem *reg = ps->base.sysctl_bar + PEARL_PCIE_CFG0_OFFSET;
u32 cfg;
cfg = readl(reg);
cfg &= ~PEARL_ASSERT_INTX;
qtnf_non_posted_write(cfg, reg);
}
static void qtnf_pearl_reset_ep(struct qtnf_pcie_pearl_state *ps)
{
const u32 data = QTN_PEARL_IPC_IRQ_WORD(QTN_PEARL_LHOST_EP_RESET);
void __iomem *reg = ps->base.sysctl_bar +
QTN_PEARL_SYSCTL_LHOST_IRQ_OFFSET;
qtnf_non_posted_write(data, reg);
msleep(QTN_EP_RESET_WAIT_MS);
pci_restore_state(ps->base.pdev);
}
static void qtnf_pcie_pearl_ipc_gen_ep_int(void *arg)
{
const struct qtnf_pcie_pearl_state *ps = arg;
const u32 data = QTN_PEARL_IPC_IRQ_WORD(QTN_PEARL_LHOST_IPC_IRQ);
void __iomem *reg = ps->base.sysctl_bar +
QTN_PEARL_SYSCTL_LHOST_IRQ_OFFSET;
qtnf_non_posted_write(data, reg);
}
static int qtnf_is_state(__le32 __iomem *reg, u32 state)
{
u32 s = readl(reg);
return s & state;
}
static void qtnf_set_state(__le32 __iomem *reg, u32 state)
{
u32 s = readl(reg);
qtnf_non_posted_write(state | s, reg);
}
static void qtnf_clear_state(__le32 __iomem *reg, u32 state)
{
u32 s = readl(reg);
qtnf_non_posted_write(s & ~state, reg);
}
static int qtnf_poll_state(__le32 __iomem *reg, u32 state, u32 delay_in_ms)
{
u32 timeout = 0;
while ((qtnf_is_state(reg, state) == 0)) {
usleep_range(1000, 1200);
if (++timeout > delay_in_ms)
return -1;
}
return 0;
}
static int pearl_alloc_bd_table(struct qtnf_pcie_pearl_state *ps)
{
struct qtnf_pcie_bus_priv *priv = &ps->base;
dma_addr_t paddr;
void *vaddr;
int len;
len = priv->tx_bd_num * sizeof(struct qtnf_pearl_tx_bd) +
priv->rx_bd_num * sizeof(struct qtnf_pearl_rx_bd);
vaddr = dmam_alloc_coherent(&priv->pdev->dev, len, &paddr, GFP_KERNEL);
if (!vaddr)
return -ENOMEM;
/* tx bd */
memset(vaddr, 0, len);
ps->bd_table_vaddr = vaddr;
ps->bd_table_paddr = paddr;
ps->bd_table_len = len;
ps->tx_bd_vbase = vaddr;
ps->tx_bd_pbase = paddr;
pr_debug("TX descriptor table: vaddr=0x%p paddr=%pad\n", vaddr, &paddr);
priv->tx_bd_r_index = 0;
priv->tx_bd_w_index = 0;
/* rx bd */
vaddr = ((struct qtnf_pearl_tx_bd *)vaddr) + priv->tx_bd_num;
paddr += priv->tx_bd_num * sizeof(struct qtnf_pearl_tx_bd);
ps->rx_bd_vbase = vaddr;
ps->rx_bd_pbase = paddr;
#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
writel(QTN_HOST_HI32(paddr),
PCIE_HDP_TX_HOST_Q_BASE_H(ps->pcie_reg_base));
#endif
writel(QTN_HOST_LO32(paddr),
PCIE_HDP_TX_HOST_Q_BASE_L(ps->pcie_reg_base));
writel(priv->rx_bd_num | (sizeof(struct qtnf_pearl_rx_bd)) << 16,
PCIE_HDP_TX_HOST_Q_SZ_CTRL(ps->pcie_reg_base));
pr_debug("RX descriptor table: vaddr=0x%p paddr=%pad\n", vaddr, &paddr);
return 0;
}
static int pearl_skb2rbd_attach(struct qtnf_pcie_pearl_state *ps, u16 index)
{
struct qtnf_pcie_bus_priv *priv = &ps->base;
struct qtnf_pearl_rx_bd *rxbd;
struct sk_buff *skb;
dma_addr_t paddr;
skb = __netdev_alloc_skb_ip_align(NULL, SKB_BUF_SIZE, GFP_ATOMIC);
if (!skb) {
priv->rx_skb[index] = NULL;
return -ENOMEM;
}
priv->rx_skb[index] = skb;
rxbd = &ps->rx_bd_vbase[index];
paddr = pci_map_single(priv->pdev, skb->data,
SKB_BUF_SIZE, PCI_DMA_FROMDEVICE);
if (pci_dma_mapping_error(priv->pdev, paddr)) {
pr_err("skb DMA mapping error: %pad\n", &paddr);
return -ENOMEM;
}
/* keep rx skb paddrs in rx buffer descriptors for cleanup purposes */
rxbd->addr = cpu_to_le32(QTN_HOST_LO32(paddr));
rxbd->addr_h = cpu_to_le32(QTN_HOST_HI32(paddr));
rxbd->info = 0x0;
priv->rx_bd_w_index = index;
/* sync up all descriptor updates */
wmb();
#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
writel(QTN_HOST_HI32(paddr),
PCIE_HDP_HHBM_BUF_PTR_H(ps->pcie_reg_base));
#endif
writel(QTN_HOST_LO32(paddr),
PCIE_HDP_HHBM_BUF_PTR(ps->pcie_reg_base));
writel(index, PCIE_HDP_TX_HOST_Q_WR_PTR(ps->pcie_reg_base));
return 0;
}
static int pearl_alloc_rx_buffers(struct qtnf_pcie_pearl_state *ps)
{
u16 i;
int ret = 0;
memset(ps->rx_bd_vbase, 0x0,
ps->base.rx_bd_num * sizeof(struct qtnf_pearl_rx_bd));
for (i = 0; i < ps->base.rx_bd_num; i++) {
ret = pearl_skb2rbd_attach(ps, i);
if (ret)
break;
}
return ret;
}
/* all rx/tx activity should have ceased before calling this function */
static void qtnf_pearl_free_xfer_buffers(struct qtnf_pcie_pearl_state *ps)
{
struct qtnf_pcie_bus_priv *priv = &ps->base;
struct qtnf_pearl_tx_bd *txbd;
struct qtnf_pearl_rx_bd *rxbd;
struct sk_buff *skb;
dma_addr_t paddr;
int i;
/* free rx buffers */
for (i = 0; i < priv->rx_bd_num; i++) {
if (priv->rx_skb && priv->rx_skb[i]) {
rxbd = &ps->rx_bd_vbase[i];
skb = priv->rx_skb[i];
paddr = QTN_HOST_ADDR(le32_to_cpu(rxbd->addr_h),
le32_to_cpu(rxbd->addr));
pci_unmap_single(priv->pdev, paddr, SKB_BUF_SIZE,
PCI_DMA_FROMDEVICE);
dev_kfree_skb_any(skb);
priv->rx_skb[i] = NULL;
}
}
/* free tx buffers */
for (i = 0; i < priv->tx_bd_num; i++) {
if (priv->tx_skb && priv->tx_skb[i]) {
txbd = &ps->tx_bd_vbase[i];
skb = priv->tx_skb[i];
paddr = QTN_HOST_ADDR(le32_to_cpu(txbd->addr_h),
le32_to_cpu(txbd->addr));
pci_unmap_single(priv->pdev, paddr, skb->len,
PCI_DMA_TODEVICE);
dev_kfree_skb_any(skb);
priv->tx_skb[i] = NULL;
}
}
}
static int pearl_hhbm_init(struct qtnf_pcie_pearl_state *ps)
{
u32 val;
val = readl(PCIE_HHBM_CONFIG(ps->pcie_reg_base));
val |= HHBM_CONFIG_SOFT_RESET;
writel(val, PCIE_HHBM_CONFIG(ps->pcie_reg_base));
usleep_range(50, 100);
val &= ~HHBM_CONFIG_SOFT_RESET;
#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
val |= HHBM_64BIT;
#endif
writel(val, PCIE_HHBM_CONFIG(ps->pcie_reg_base));
writel(ps->base.rx_bd_num, PCIE_HHBM_Q_LIMIT_REG(ps->pcie_reg_base));
return 0;
}
static int qtnf_pcie_pearl_init_xfer(struct qtnf_pcie_pearl_state *ps,
unsigned int tx_bd_size)
{
struct qtnf_pcie_bus_priv *priv = &ps->base;
int ret;
u32 val;
if (tx_bd_size == 0)
tx_bd_size = PEARL_TX_BD_SIZE_DEFAULT;
val = tx_bd_size * sizeof(struct qtnf_pearl_tx_bd);
if (!is_power_of_2(tx_bd_size) || val > PCIE_HHBM_MAX_SIZE) {
pr_warn("bad tx_bd_size value %u\n", tx_bd_size);
priv->tx_bd_num = PEARL_TX_BD_SIZE_DEFAULT;
} else {
priv->tx_bd_num = tx_bd_size;
}
priv->rx_bd_w_index = 0;
priv->rx_bd_r_index = 0;
if (!priv->rx_bd_num || !is_power_of_2(priv->rx_bd_num)) {
pr_err("rx_bd_size_param %u is not power of two\n",
priv->rx_bd_num);
return -EINVAL;
}
val = priv->rx_bd_num * sizeof(dma_addr_t);
if (val > PCIE_HHBM_MAX_SIZE) {
pr_err("rx_bd_size_param %u is too large\n",
priv->rx_bd_num);
return -EINVAL;
}
ret = pearl_hhbm_init(ps);
if (ret) {
pr_err("failed to init h/w queues\n");
return ret;
}
ret = qtnf_pcie_alloc_skb_array(priv);
if (ret) {
pr_err("failed to allocate skb array\n");
return ret;
}
ret = pearl_alloc_bd_table(ps);
if (ret) {
pr_err("failed to allocate bd table\n");
return ret;
}
ret = pearl_alloc_rx_buffers(ps);
if (ret) {
pr_err("failed to allocate rx buffers\n");
return ret;
}
return ret;
}
static void qtnf_pearl_data_tx_reclaim(struct qtnf_pcie_pearl_state *ps)
{
struct qtnf_pcie_bus_priv *priv = &ps->base;
struct qtnf_pearl_tx_bd *txbd;
struct sk_buff *skb;
unsigned long flags;
dma_addr_t paddr;
u32 tx_done_index;
int count = 0;
int i;
spin_lock_irqsave(&priv->tx_reclaim_lock, flags);
tx_done_index = readl(PCIE_HDP_RX0DMA_CNT(ps->pcie_reg_base))
& (priv->tx_bd_num - 1);
i = priv->tx_bd_r_index;
while (CIRC_CNT(tx_done_index, i, priv->tx_bd_num)) {
skb = priv->tx_skb[i];
if (likely(skb)) {
txbd = &ps->tx_bd_vbase[i];
paddr = QTN_HOST_ADDR(le32_to_cpu(txbd->addr_h),
le32_to_cpu(txbd->addr));
pci_unmap_single(priv->pdev, paddr, skb->len,
PCI_DMA_TODEVICE);
if (skb->dev) {
qtnf_update_tx_stats(skb->dev, skb);
if (unlikely(priv->tx_stopped)) {
qtnf_wake_all_queues(skb->dev);
priv->tx_stopped = 0;
}
}
dev_kfree_skb_any(skb);
}
priv->tx_skb[i] = NULL;
count++;
if (++i >= priv->tx_bd_num)
i = 0;
}
priv->tx_reclaim_done += count;
priv->tx_reclaim_req++;
priv->tx_bd_r_index = i;
spin_unlock_irqrestore(&priv->tx_reclaim_lock, flags);
}
static int qtnf_tx_queue_ready(struct qtnf_pcie_pearl_state *ps)
{
struct qtnf_pcie_bus_priv *priv = &ps->base;
if (!CIRC_SPACE(priv->tx_bd_w_index, priv->tx_bd_r_index,
priv->tx_bd_num)) {
qtnf_pearl_data_tx_reclaim(ps);
if (!CIRC_SPACE(priv->tx_bd_w_index, priv->tx_bd_r_index,
priv->tx_bd_num)) {
pr_warn_ratelimited("reclaim full Tx queue\n");
priv->tx_full_count++;
return 0;
}
}
return 1;
}
static int qtnf_pcie_data_tx(struct qtnf_bus *bus, struct sk_buff *skb)
{
struct qtnf_pcie_pearl_state *ps = get_bus_priv(bus);
struct qtnf_pcie_bus_priv *priv = &ps->base;
dma_addr_t txbd_paddr, skb_paddr;
struct qtnf_pearl_tx_bd *txbd;
unsigned long flags;
int len, i;
u32 info;
int ret = 0;
spin_lock_irqsave(&priv->tx_lock, flags);
if (!qtnf_tx_queue_ready(ps)) {
if (skb->dev) {
netif_tx_stop_all_queues(skb->dev);
priv->tx_stopped = 1;
}
spin_unlock_irqrestore(&priv->tx_lock, flags);
return NETDEV_TX_BUSY;
}
i = priv->tx_bd_w_index;
priv->tx_skb[i] = skb;
len = skb->len;
skb_paddr = pci_map_single(priv->pdev, skb->data,
skb->len, PCI_DMA_TODEVICE);
if (pci_dma_mapping_error(priv->pdev, skb_paddr)) {
pr_err("skb DMA mapping error: %pad\n", &skb_paddr);
ret = -ENOMEM;
goto tx_done;
}
txbd = &ps->tx_bd_vbase[i];
txbd->addr = cpu_to_le32(QTN_HOST_LO32(skb_paddr));
txbd->addr_h = cpu_to_le32(QTN_HOST_HI32(skb_paddr));
info = (len & QTN_PCIE_TX_DESC_LEN_MASK) << QTN_PCIE_TX_DESC_LEN_SHIFT;
txbd->info = cpu_to_le32(info);
/* sync up all descriptor updates before passing them to EP */
dma_wmb();
/* write new TX descriptor to PCIE_RX_FIFO on EP */
txbd_paddr = ps->tx_bd_pbase + i * sizeof(struct qtnf_pearl_tx_bd);
#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
writel(QTN_HOST_HI32(txbd_paddr),
PCIE_HDP_HOST_WR_DESC0_H(ps->pcie_reg_base));
#endif
writel(QTN_HOST_LO32(txbd_paddr),
PCIE_HDP_HOST_WR_DESC0(ps->pcie_reg_base));
if (++i >= priv->tx_bd_num)
i = 0;
priv->tx_bd_w_index = i;
tx_done:
if (ret && skb) {
pr_err_ratelimited("drop skb\n");
if (skb->dev)
skb->dev->stats.tx_dropped++;
dev_kfree_skb_any(skb);
}
priv->tx_done_count++;
spin_unlock_irqrestore(&priv->tx_lock, flags);
qtnf_pearl_data_tx_reclaim(ps);
return NETDEV_TX_OK;
}
static irqreturn_t qtnf_pcie_pearl_interrupt(int irq, void *data)
{
struct qtnf_bus *bus = (struct qtnf_bus *)data;
struct qtnf_pcie_pearl_state *ps = get_bus_priv(bus);
struct qtnf_pcie_bus_priv *priv = &ps->base;
u32 status;
priv->pcie_irq_count++;
status = readl(PCIE_HDP_INT_STATUS(ps->pcie_reg_base));
qtnf_shm_ipc_irq_handler(&priv->shm_ipc_ep_in);
qtnf_shm_ipc_irq_handler(&priv->shm_ipc_ep_out);
if (!(status & ps->pcie_irq_mask))
goto irq_done;
if (status & PCIE_HDP_INT_RX_BITS)
ps->pcie_irq_rx_count++;
if (status & PCIE_HDP_INT_TX_BITS)
ps->pcie_irq_tx_count++;
if (status & PCIE_HDP_INT_HHBM_UF)
ps->pcie_irq_uf_count++;
if (status & PCIE_HDP_INT_RX_BITS) {
qtnf_dis_rxdone_irq(ps);
napi_schedule(&bus->mux_napi);
}
if (status & PCIE_HDP_INT_TX_BITS) {
qtnf_dis_txdone_irq(ps);
tasklet_hi_schedule(&priv->reclaim_tq);
}
irq_done:
/* H/W workaround: clean all bits, not only enabled */
qtnf_non_posted_write(~0U, PCIE_HDP_INT_STATUS(ps->pcie_reg_base));
if (!priv->msi_enabled)
qtnf_deassert_intx(ps);
return IRQ_HANDLED;
}
static int qtnf_rx_data_ready(struct qtnf_pcie_pearl_state *ps)
{
u16 index = ps->base.rx_bd_r_index;
struct qtnf_pearl_rx_bd *rxbd;
u32 descw;
rxbd = &ps->rx_bd_vbase[index];
descw = le32_to_cpu(rxbd->info);
if (descw & QTN_TXDONE_MASK)
return 1;
return 0;
}
static int qtnf_pcie_pearl_rx_poll(struct napi_struct *napi, int budget)
{
struct qtnf_bus *bus = container_of(napi, struct qtnf_bus, mux_napi);
struct qtnf_pcie_pearl_state *ps = get_bus_priv(bus);
struct qtnf_pcie_bus_priv *priv = &ps->base;
struct net_device *ndev = NULL;
struct sk_buff *skb = NULL;
int processed = 0;
struct qtnf_pearl_rx_bd *rxbd;
dma_addr_t skb_paddr;
int consume;
u32 descw;
u32 psize;
u16 r_idx;
u16 w_idx;
int ret;
while (processed < budget) {
if (!qtnf_rx_data_ready(ps))
goto rx_out;
r_idx = priv->rx_bd_r_index;
rxbd = &ps->rx_bd_vbase[r_idx];
descw = le32_to_cpu(rxbd->info);
skb = priv->rx_skb[r_idx];
psize = QTN_GET_LEN(descw);
consume = 1;
if (!(descw & QTN_TXDONE_MASK)) {
pr_warn("skip invalid rxbd[%d]\n", r_idx);
consume = 0;
}
if (!skb) {
pr_warn("skip missing rx_skb[%d]\n", r_idx);
consume = 0;
}
if (skb && (skb_tailroom(skb) < psize)) {
pr_err("skip packet with invalid length: %u > %u\n",
psize, skb_tailroom(skb));
consume = 0;
}
if (skb) {
skb_paddr = QTN_HOST_ADDR(le32_to_cpu(rxbd->addr_h),
le32_to_cpu(rxbd->addr));
pci_unmap_single(priv->pdev, skb_paddr, SKB_BUF_SIZE,
PCI_DMA_FROMDEVICE);
}
if (consume) {
skb_put(skb, psize);
ndev = qtnf_classify_skb(bus, skb);
if (likely(ndev)) {
qtnf_update_rx_stats(ndev, skb);
skb->protocol = eth_type_trans(skb, ndev);
napi_gro_receive(napi, skb);
} else {
pr_debug("drop untagged skb\n");
bus->mux_dev.stats.rx_dropped++;
dev_kfree_skb_any(skb);
}
} else {
if (skb) {
bus->mux_dev.stats.rx_dropped++;
dev_kfree_skb_any(skb);
}
}
priv->rx_skb[r_idx] = NULL;
if (++r_idx >= priv->rx_bd_num)
r_idx = 0;
priv->rx_bd_r_index = r_idx;
/* repalce processed buffer by a new one */
w_idx = priv->rx_bd_w_index;
while (CIRC_SPACE(priv->rx_bd_w_index, priv->rx_bd_r_index,
priv->rx_bd_num) > 0) {
if (++w_idx >= priv->rx_bd_num)
w_idx = 0;
ret = pearl_skb2rbd_attach(ps, w_idx);
if (ret) {
pr_err("failed to allocate new rx_skb[%d]\n",
w_idx);
break;
}
}
processed++;
}
rx_out:
if (processed < budget) {
napi_complete(napi);
qtnf_en_rxdone_irq(ps);
}
return processed;
}
static void
qtnf_pcie_data_tx_timeout(struct qtnf_bus *bus, struct net_device *ndev)
{
struct qtnf_pcie_pearl_state *ps = (void *)get_bus_priv(bus);
tasklet_hi_schedule(&ps->base.reclaim_tq);
}
static void qtnf_pcie_data_rx_start(struct qtnf_bus *bus)
{
struct qtnf_pcie_pearl_state *ps = (void *)get_bus_priv(bus);
qtnf_enable_hdp_irqs(ps);
napi_enable(&bus->mux_napi);
}
static void qtnf_pcie_data_rx_stop(struct qtnf_bus *bus)
{
struct qtnf_pcie_pearl_state *ps = (void *)get_bus_priv(bus);
napi_disable(&bus->mux_napi);
qtnf_disable_hdp_irqs(ps);
}
static const struct qtnf_bus_ops qtnf_pcie_pearl_bus_ops = {
/* control path methods */
.control_tx = qtnf_pcie_control_tx,
/* data path methods */
.data_tx = qtnf_pcie_data_tx,
.data_tx_timeout = qtnf_pcie_data_tx_timeout,
.data_rx_start = qtnf_pcie_data_rx_start,
.data_rx_stop = qtnf_pcie_data_rx_stop,
};
static int qtnf_dbg_irq_stats(struct seq_file *s, void *data)
{
struct qtnf_bus *bus = dev_get_drvdata(s->private);
struct qtnf_pcie_pearl_state *ps = get_bus_priv(bus);
u32 reg = readl(PCIE_HDP_INT_EN(ps->pcie_reg_base));
u32 status;
seq_printf(s, "pcie_irq_count(%u)\n", ps->base.pcie_irq_count);
seq_printf(s, "pcie_irq_tx_count(%u)\n", ps->pcie_irq_tx_count);
status = reg & PCIE_HDP_INT_TX_BITS;
seq_printf(s, "pcie_irq_tx_status(%s)\n",
(status == PCIE_HDP_INT_TX_BITS) ? "EN" : "DIS");
seq_printf(s, "pcie_irq_rx_count(%u)\n", ps->pcie_irq_rx_count);
status = reg & PCIE_HDP_INT_RX_BITS;
seq_printf(s, "pcie_irq_rx_status(%s)\n",
(status == PCIE_HDP_INT_RX_BITS) ? "EN" : "DIS");
seq_printf(s, "pcie_irq_uf_count(%u)\n", ps->pcie_irq_uf_count);
status = reg & PCIE_HDP_INT_HHBM_UF;
seq_printf(s, "pcie_irq_hhbm_uf_status(%s)\n",
(status == PCIE_HDP_INT_HHBM_UF) ? "EN" : "DIS");
return 0;
}
static int qtnf_dbg_hdp_stats(struct seq_file *s, void *data)
{
struct qtnf_bus *bus = dev_get_drvdata(s->private);
struct qtnf_pcie_pearl_state *ps = get_bus_priv(bus);
struct qtnf_pcie_bus_priv *priv = &ps->base;
seq_printf(s, "tx_full_count(%u)\n", priv->tx_full_count);
seq_printf(s, "tx_done_count(%u)\n", priv->tx_done_count);
seq_printf(s, "tx_reclaim_done(%u)\n", priv->tx_reclaim_done);
seq_printf(s, "tx_reclaim_req(%u)\n", priv->tx_reclaim_req);
seq_printf(s, "tx_bd_r_index(%u)\n", priv->tx_bd_r_index);
seq_printf(s, "tx_bd_p_index(%u)\n",
readl(PCIE_HDP_RX0DMA_CNT(ps->pcie_reg_base))
& (priv->tx_bd_num - 1));
seq_printf(s, "tx_bd_w_index(%u)\n", priv->tx_bd_w_index);
seq_printf(s, "tx queue len(%u)\n",
CIRC_CNT(priv->tx_bd_w_index, priv->tx_bd_r_index,
priv->tx_bd_num));
seq_printf(s, "rx_bd_r_index(%u)\n", priv->rx_bd_r_index);
seq_printf(s, "rx_bd_p_index(%u)\n",
readl(PCIE_HDP_TX0DMA_CNT(ps->pcie_reg_base))
& (priv->rx_bd_num - 1));
seq_printf(s, "rx_bd_w_index(%u)\n", priv->rx_bd_w_index);
seq_printf(s, "rx alloc queue len(%u)\n",
CIRC_SPACE(priv->rx_bd_w_index, priv->rx_bd_r_index,
priv->rx_bd_num));
return 0;
}
static int qtnf_ep_fw_send(struct pci_dev *pdev, uint32_t size,
int blk, const u8 *pblk, const u8 *fw)
{
struct qtnf_bus *bus = pci_get_drvdata(pdev);
struct qtnf_pearl_fw_hdr *hdr;
u8 *pdata;
int hds = sizeof(*hdr);
struct sk_buff *skb = NULL;
int len = 0;
int ret;
skb = __dev_alloc_skb(QTN_PCIE_FW_BUFSZ, GFP_KERNEL);
if (!skb)
return -ENOMEM;
skb->len = QTN_PCIE_FW_BUFSZ;
skb->dev = NULL;
hdr = (struct qtnf_pearl_fw_hdr *)skb->data;
memcpy(hdr->boardflg, QTN_PCIE_BOARDFLG, strlen(QTN_PCIE_BOARDFLG));
hdr->fwsize = cpu_to_le32(size);
hdr->seqnum = cpu_to_le32(blk);
if (blk)
hdr->type = cpu_to_le32(QTN_FW_DSUB);
else
hdr->type = cpu_to_le32(QTN_FW_DBEGIN);
pdata = skb->data + hds;
len = QTN_PCIE_FW_BUFSZ - hds;
if (pblk >= (fw + size - len)) {
len = fw + size - pblk;
hdr->type = cpu_to_le32(QTN_FW_DEND);
}
hdr->pktlen = cpu_to_le32(len);
memcpy(pdata, pblk, len);
hdr->crc = cpu_to_le32(~crc32(0, pdata, len));
ret = qtnf_pcie_data_tx(bus, skb);
return (ret == NETDEV_TX_OK) ? len : 0;
}
static int
qtnf_ep_fw_load(struct qtnf_pcie_pearl_state *ps, const u8 *fw, u32 fw_size)
{
int blk_size = QTN_PCIE_FW_BUFSZ - sizeof(struct qtnf_pearl_fw_hdr);
int blk_count = fw_size / blk_size + ((fw_size % blk_size) ? 1 : 0);
const u8 *pblk = fw;
int threshold = 0;
int blk = 0;
int len;
pr_debug("FW upload started: fw_addr=0x%p size=%d\n", fw, fw_size);
while (blk < blk_count) {
if (++threshold > 10000) {
pr_err("FW upload failed: too many retries\n");
return -ETIMEDOUT;
}
len = qtnf_ep_fw_send(ps->base.pdev, fw_size, blk, pblk, fw);
if (len <= 0)
continue;
if (!((blk + 1) & QTN_PCIE_FW_DLMASK) ||
(blk == (blk_count - 1))) {
qtnf_set_state(&ps->bda->bda_rc_state,
QTN_RC_FW_SYNC);
if (qtnf_poll_state(&ps->bda->bda_ep_state,
QTN_EP_FW_SYNC,
QTN_FW_DL_TIMEOUT_MS)) {
pr_err("FW upload failed: SYNC timed out\n");
return -ETIMEDOUT;
}
qtnf_clear_state(&ps->bda->bda_ep_state,
QTN_EP_FW_SYNC);
if (qtnf_is_state(&ps->bda->bda_ep_state,
QTN_EP_FW_RETRY)) {
if (blk == (blk_count - 1)) {
int last_round =
blk_count & QTN_PCIE_FW_DLMASK;
blk -= last_round;
pblk -= ((last_round - 1) *
blk_size + len);
} else {
blk -= QTN_PCIE_FW_DLMASK;
pblk -= QTN_PCIE_FW_DLMASK * blk_size;
}
qtnf_clear_state(&ps->bda->bda_ep_state,
QTN_EP_FW_RETRY);
pr_warn("FW upload retry: block #%d\n", blk);
continue;
}
qtnf_pearl_data_tx_reclaim(ps);
}
pblk += len;
blk++;
}
pr_debug("FW upload completed: totally sent %d blocks\n", blk);
return 0;
}
static void qtnf_pearl_fw_work_handler(struct work_struct *work)
{
struct qtnf_bus *bus = container_of(work, struct qtnf_bus, fw_work);
struct qtnf_pcie_pearl_state *ps = (void *)get_bus_priv(bus);
struct pci_dev *pdev = ps->base.pdev;
const struct firmware *fw;
int ret;
u32 state = QTN_RC_FW_LOADRDY | QTN_RC_FW_QLINK;
const char *fwname = QTN_PCI_PEARL_FW_NAME;
bool fw_boot_success = false;
if (ps->base.flashboot) {
state |= QTN_RC_FW_FLASHBOOT;
} else {
ret = request_firmware(&fw, fwname, &pdev->dev);
if (ret < 0) {
pr_err("failed to get firmware %s\n", fwname);
goto fw_load_exit;
}
}
qtnf_set_state(&ps->bda->bda_rc_state, state);
if (qtnf_poll_state(&ps->bda->bda_ep_state, QTN_EP_FW_LOADRDY,
QTN_FW_DL_TIMEOUT_MS)) {
pr_err("card is not ready\n");
if (!ps->base.flashboot)
release_firmware(fw);
goto fw_load_exit;
}
qtnf_clear_state(&ps->bda->bda_ep_state, QTN_EP_FW_LOADRDY);
if (ps->base.flashboot) {
pr_info("booting firmware from flash\n");
} else {
pr_info("starting firmware upload: %s\n", fwname);
ret = qtnf_ep_fw_load(ps, fw->data, fw->size);
release_firmware(fw);
if (ret) {
pr_err("firmware upload error\n");
goto fw_load_exit;
}
}
if (qtnf_poll_state(&ps->bda->bda_ep_state, QTN_EP_FW_DONE,
QTN_FW_DL_TIMEOUT_MS)) {
pr_err("firmware bringup timed out\n");
goto fw_load_exit;
}
pr_info("firmware is up and running\n");
if (qtnf_poll_state(&ps->bda->bda_ep_state,
QTN_EP_FW_QLINK_DONE, QTN_FW_QLINK_TIMEOUT_MS)) {
pr_err("firmware runtime failure\n");
goto fw_load_exit;
}
fw_boot_success = true;
fw_load_exit:
qtnf_pcie_fw_boot_done(bus, fw_boot_success);
if (fw_boot_success) {
qtnf_debugfs_add_entry(bus, "hdp_stats", qtnf_dbg_hdp_stats);
qtnf_debugfs_add_entry(bus, "irq_stats", qtnf_dbg_irq_stats);
}
}
static void qtnf_pearl_reclaim_tasklet_fn(unsigned long data)
{
struct qtnf_pcie_pearl_state *ps = (void *)data;
qtnf_pearl_data_tx_reclaim(ps);
qtnf_en_txdone_irq(ps);
}
static u64 qtnf_pearl_dma_mask_get(void)
{
#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
return DMA_BIT_MASK(64);
#else
return DMA_BIT_MASK(32);
#endif
}
static int qtnf_pcie_pearl_probe(struct qtnf_bus *bus, unsigned int tx_bd_size)
{
struct qtnf_shm_ipc_int ipc_int;
struct qtnf_pcie_pearl_state *ps = get_bus_priv(bus);
struct pci_dev *pdev = ps->base.pdev;
int ret;
bus->bus_ops = &qtnf_pcie_pearl_bus_ops;
spin_lock_init(&ps->irq_lock);
INIT_WORK(&bus->fw_work, qtnf_pearl_fw_work_handler);
ps->pcie_reg_base = ps->base.dmareg_bar;
ps->bda = ps->base.epmem_bar;
writel(ps->base.msi_enabled, &ps->bda->bda_rc_msi_enabled);
ret = qtnf_pcie_pearl_init_xfer(ps, tx_bd_size);
if (ret) {
pr_err("PCIE xfer init failed\n");
return ret;
}
/* init default irq settings */
qtnf_init_hdp_irqs(ps);
/* start with disabled irqs */
qtnf_disable_hdp_irqs(ps);
ret = devm_request_irq(&pdev->dev, pdev->irq,
&qtnf_pcie_pearl_interrupt, 0,
"qtnf_pearl_irq", (void *)bus);
if (ret) {
pr_err("failed to request pcie irq %d\n", pdev->irq);
qtnf_pearl_free_xfer_buffers(ps);
return ret;
}
tasklet_init(&ps->base.reclaim_tq, qtnf_pearl_reclaim_tasklet_fn,
(unsigned long)ps);
netif_napi_add(&bus->mux_dev, &bus->mux_napi,
qtnf_pcie_pearl_rx_poll, 10);
ipc_int.fn = qtnf_pcie_pearl_ipc_gen_ep_int;
ipc_int.arg = ps;
qtnf_pcie_init_shm_ipc(&ps->base, &ps->bda->bda_shm_reg1,
&ps->bda->bda_shm_reg2, &ipc_int);
return 0;
}
static void qtnf_pcie_pearl_remove(struct qtnf_bus *bus)
{
struct qtnf_pcie_pearl_state *ps = get_bus_priv(bus);
qtnf_pearl_reset_ep(ps);
qtnf_pearl_free_xfer_buffers(ps);
}
#ifdef CONFIG_PM_SLEEP
static int qtnf_pcie_pearl_suspend(struct qtnf_bus *bus)
{
return -EOPNOTSUPP;
}
static int qtnf_pcie_pearl_resume(struct qtnf_bus *bus)
{
return 0;
}
#endif
struct qtnf_bus *qtnf_pcie_pearl_alloc(struct pci_dev *pdev)
{
struct qtnf_bus *bus;
struct qtnf_pcie_pearl_state *ps;
bus = devm_kzalloc(&pdev->dev, sizeof(*bus) + sizeof(*ps), GFP_KERNEL);
if (!bus)
return NULL;
ps = get_bus_priv(bus);
ps->base.probe_cb = qtnf_pcie_pearl_probe;
ps->base.remove_cb = qtnf_pcie_pearl_remove;
ps->base.dma_mask_get_cb = qtnf_pearl_dma_mask_get;
#ifdef CONFIG_PM_SLEEP
ps->base.resume_cb = qtnf_pcie_pearl_resume;
ps->base.suspend_cb = qtnf_pcie_pearl_suspend;
#endif
return bus;
}