u-boot/drivers/net/pfe_eth/pfe_driver.c

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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2015-2016 Freescale Semiconductor, Inc.
* Copyright 2017 NXP
*/
#include <log.h>
#include <malloc.h>
#include <linux/delay.h>
#include <net/pfe_eth/pfe_eth.h>
#include <net/pfe_eth/pfe_firmware.h>
static struct tx_desc_s *g_tx_desc;
static struct rx_desc_s *g_rx_desc;
/*
* HIF Rx interface function
* Reads the rx descriptor from the current location (rx_to_read).
* - If the descriptor has a valid data/pkt, then get the data pointer
* - check for the input rx phy number
* - increment the rx data pointer by pkt_head_room_size
* - decrement the data length by pkt_head_room_size
* - handover the packet to caller.
*
* @param[out] pkt_ptr - Pointer to store rx packet
* @param[out] phy_port - Pointer to store recv phy port
*
* @return -1 if no packet, else return length of packet.
*/
int pfe_recv(uchar **pkt_ptr, int *phy_port)
{
struct rx_desc_s *rx_desc = g_rx_desc;
struct buf_desc *bd;
int len = 0;
struct hif_header_s *hif_header;
bd = rx_desc->rx_base + rx_desc->rx_to_read;
if (readl(&bd->ctrl) & BD_CTRL_DESC_EN)
return len; /* No pending Rx packet */
/* this len include hif_header(8 bytes) */
len = readl(&bd->ctrl) & 0xFFFF;
hif_header = (struct hif_header_s *)DDR_PFE_TO_VIRT(readl(&bd->data));
/* Get the receive port info from the packet */
debug("Pkt received:");
debug(" Pkt ptr(%p), len(%d), gemac_port(%d) status(%08x)\n",
hif_header, len, hif_header->port_no, readl(&bd->status));
#ifdef DEBUG
{
int i;
unsigned char *p = (unsigned char *)hif_header;
for (i = 0; i < len; i++) {
if (!(i % 16))
printf("\n");
printf(" %02x", p[i]);
}
printf("\n");
}
#endif
*pkt_ptr = (uchar *)(hif_header + 1);
*phy_port = hif_header->port_no;
len -= sizeof(struct hif_header_s);
return len;
}
/*
* HIF function to check the Rx done
* This function will check the rx done indication of the current rx_to_read
* locations
* if success, moves the rx_to_read to next location.
*/
int pfe_eth_free_pkt(struct udevice *dev, uchar *packet, int length)
{
struct rx_desc_s *rx_desc = g_rx_desc;
struct buf_desc *bd;
debug("%s:rx_base: %p, rx_to_read: %d\n", __func__, rx_desc->rx_base,
rx_desc->rx_to_read);
bd = rx_desc->rx_base + rx_desc->rx_to_read;
/* reset the control field */
writel((MAX_FRAME_SIZE | BD_CTRL_LIFM | BD_CTRL_DESC_EN
| BD_CTRL_DIR), &bd->ctrl);
writel(0, &bd->status);
debug("Rx Done : status: %08x, ctrl: %08x\n", readl(&bd->status),
readl(&bd->ctrl));
/* Give START_STROBE to BDP to fetch the descriptor __NOW__,
* BDP need not wait for rx_poll_cycle time to fetch the descriptor,
* In idle state (ie., no rx pkt), BDP will not fetch
* the descriptor even if strobe is given.
*/
writel((readl(HIF_RX_CTRL) | HIF_CTRL_BDP_CH_START_WSTB), HIF_RX_CTRL);
/* increment the rx_to_read index to next location */
rx_desc->rx_to_read = (rx_desc->rx_to_read + 1)
& (rx_desc->rx_ring_size - 1);
debug("Rx next pkt location: %d\n", rx_desc->rx_to_read);
return 0;
}
/*
* HIF Tx interface function
* This function sends a single packet to PFE from HIF interface.
* - No interrupt indication on tx completion.
* - Data is copied to tx buffers before tx descriptor is updated
* and TX DMA is enabled.
*
* @param[in] phy_port Phy port number to send out this packet
* @param[in] data Pointer to the data
* @param[in] length Length of the ethernet packet to be transferred.
*
* @return -1 if tx Q is full, else returns the tx location where the pkt is
* placed.
*/
int pfe_send(int phy_port, void *data, int length)
{
struct tx_desc_s *tx_desc = g_tx_desc;
struct buf_desc *bd;
struct hif_header_s hif_header;
u8 *tx_buf_va;
debug("%s:pkt: %p, len: %d, tx_base: %p, tx_to_send: %d\n", __func__,
data, length, tx_desc->tx_base, tx_desc->tx_to_send);
bd = tx_desc->tx_base + tx_desc->tx_to_send;
/* check queue-full condition */
if (readl(&bd->ctrl) & BD_CTRL_DESC_EN)
return -1;
/* PFE checks for min pkt size */
if (length < MIN_PKT_SIZE)
length = MIN_PKT_SIZE;
tx_buf_va = (void *)DDR_PFE_TO_VIRT(readl(&bd->data));
debug("%s: tx_buf_va: %p, tx_buf_pa: %08x\n", __func__, tx_buf_va,
readl(&bd->data));
/* Fill the gemac/phy port number to send this packet out */
memset(&hif_header, 0, sizeof(struct hif_header_s));
hif_header.port_no = phy_port;
memcpy(tx_buf_va, (u8 *)&hif_header, sizeof(struct hif_header_s));
memcpy(tx_buf_va + sizeof(struct hif_header_s), data, length);
length += sizeof(struct hif_header_s);
#ifdef DEBUG
{
int i;
unsigned char *p = (unsigned char *)tx_buf_va;
for (i = 0; i < length; i++) {
if (!(i % 16))
printf("\n");
printf("%02x ", p[i]);
}
}
#endif
debug("Tx Done: status: %08x, ctrl: %08x\n", readl(&bd->status),
readl(&bd->ctrl));
/* fill the tx desc */
writel((u32)(BD_CTRL_DESC_EN | BD_CTRL_LIFM | (length & 0xFFFF)),
&bd->ctrl);
writel(0, &bd->status);
writel((HIF_CTRL_DMA_EN | HIF_CTRL_BDP_CH_START_WSTB), HIF_TX_CTRL);
udelay(100);
return tx_desc->tx_to_send;
}
/*
* HIF function to check the Tx done
* This function will check the tx done indication of the current tx_to_send
* locations
* if success, moves the tx_to_send to next location.
*
* @return -1 if TX ownership bit is not cleared by hw.
* else on success (tx done completion) return zero.
*/
int pfe_tx_done(void)
{
struct tx_desc_s *tx_desc = g_tx_desc;
struct buf_desc *bd;
debug("%s:tx_base: %p, tx_to_send: %d\n", __func__, tx_desc->tx_base,
tx_desc->tx_to_send);
bd = tx_desc->tx_base + tx_desc->tx_to_send;
/* check queue-full condition */
if (readl(&bd->ctrl) & BD_CTRL_DESC_EN)
return -1;
/* reset the control field */
writel(0, &bd->ctrl);
writel(0, &bd->status);
debug("Tx Done : status: %08x, ctrl: %08x\n", readl(&bd->status),
readl(&bd->ctrl));
/* increment the txtosend index to next location */
tx_desc->tx_to_send = (tx_desc->tx_to_send + 1)
& (tx_desc->tx_ring_size - 1);
debug("Tx next pkt location: %d\n", tx_desc->tx_to_send);
return 0;
}
/*
* Helper function to dump Rx descriptors.
*/
static inline void hif_rx_desc_dump(void)
{
struct buf_desc *bd_va;
int i;
struct rx_desc_s *rx_desc;
if (!g_rx_desc) {
printf("%s: HIF Rx desc no init\n", __func__);
return;
}
rx_desc = g_rx_desc;
bd_va = rx_desc->rx_base;
debug("HIF rx desc: base_va: %p, base_pa: %08x\n", rx_desc->rx_base,
rx_desc->rx_base_pa);
for (i = 0; i < rx_desc->rx_ring_size; i++) {
debug("status: %08x, ctrl: %08x, data: %08x, next: 0x%08x\n",
readl(&bd_va->status),
readl(&bd_va->ctrl),
readl(&bd_va->data),
readl(&bd_va->next));
bd_va++;
}
}
/*
* This function mark all Rx descriptors as LAST_BD.
*/
void hif_rx_desc_disable(void)
{
int i;
struct rx_desc_s *rx_desc;
struct buf_desc *bd_va;
if (!g_rx_desc) {
printf("%s: HIF Rx desc not initialized\n", __func__);
return;
}
rx_desc = g_rx_desc;
bd_va = rx_desc->rx_base;
for (i = 0; i < rx_desc->rx_ring_size; i++) {
writel(readl(&bd_va->ctrl) | BD_CTRL_LAST_BD, &bd_va->ctrl);
bd_va++;
}
}
/*
* HIF Rx Desc initialization function.
*/
static int hif_rx_desc_init(struct pfe_ddr_address *pfe_addr)
{
u32 ctrl;
struct buf_desc *bd_va;
struct buf_desc *bd_pa;
struct rx_desc_s *rx_desc;
u32 rx_buf_pa;
int i;
/* sanity check */
if (g_rx_desc) {
printf("%s: HIF Rx desc re-init request\n", __func__);
return 0;
}
rx_desc = (struct rx_desc_s *)malloc(sizeof(struct rx_desc_s));
if (!rx_desc) {
printf("%s: Memory allocation failure\n", __func__);
return -ENOMEM;
}
memset(rx_desc, 0, sizeof(struct rx_desc_s));
/* init: Rx ring buffer */
rx_desc->rx_ring_size = HIF_RX_DESC_NT;
/* NOTE: must be 64bit aligned */
bd_va = (struct buf_desc *)(pfe_addr->ddr_pfe_baseaddr
+ RX_BD_BASEADDR);
bd_pa = (struct buf_desc *)(pfe_addr->ddr_pfe_phys_baseaddr
+ RX_BD_BASEADDR);
rx_desc->rx_base = bd_va;
rx_desc->rx_base_pa = (unsigned long)bd_pa;
rx_buf_pa = pfe_addr->ddr_pfe_phys_baseaddr + HIF_RX_PKT_DDR_BASEADDR;
debug("%s: Rx desc base: %p, base_pa: %08x, desc_count: %d\n",
__func__, rx_desc->rx_base, rx_desc->rx_base_pa,
rx_desc->rx_ring_size);
memset(bd_va, 0, sizeof(struct buf_desc) * rx_desc->rx_ring_size);
ctrl = (MAX_FRAME_SIZE | BD_CTRL_DESC_EN | BD_CTRL_DIR | BD_CTRL_LIFM);
for (i = 0; i < rx_desc->rx_ring_size; i++) {
writel((unsigned long)(bd_pa + 1), &bd_va->next);
writel(ctrl, &bd_va->ctrl);
writel(rx_buf_pa + (i * MAX_FRAME_SIZE), &bd_va->data);
bd_va++;
bd_pa++;
}
--bd_va;
writel((u32)rx_desc->rx_base_pa, &bd_va->next);
writel(rx_desc->rx_base_pa, HIF_RX_BDP_ADDR);
writel((readl(HIF_RX_CTRL) | HIF_CTRL_BDP_CH_START_WSTB), HIF_RX_CTRL);
g_rx_desc = rx_desc;
return 0;
}
/*
* Helper function to dump Tx Descriptors.
*/
static inline void hif_tx_desc_dump(void)
{
struct tx_desc_s *tx_desc;
int i;
struct buf_desc *bd_va;
if (!g_tx_desc) {
printf("%s: HIF Tx desc no init\n", __func__);
return;
}
tx_desc = g_tx_desc;
bd_va = tx_desc->tx_base;
debug("HIF tx desc: base_va: %p, base_pa: %08x\n", tx_desc->tx_base,
tx_desc->tx_base_pa);
for (i = 0; i < tx_desc->tx_ring_size; i++)
bd_va++;
}
/*
* HIF Tx descriptor initialization function.
*/
static int hif_tx_desc_init(struct pfe_ddr_address *pfe_addr)
{
struct buf_desc *bd_va;
struct buf_desc *bd_pa;
int i;
struct tx_desc_s *tx_desc;
u32 tx_buf_pa;
/* sanity check */
if (g_tx_desc) {
printf("%s: HIF Tx desc re-init request\n", __func__);
return 0;
}
tx_desc = (struct tx_desc_s *)malloc(sizeof(struct tx_desc_s));
if (!tx_desc) {
printf("%s:%d:Memory allocation failure\n", __func__,
__LINE__);
return -ENOMEM;
}
memset(tx_desc, 0, sizeof(struct tx_desc_s));
/* init: Tx ring buffer */
tx_desc->tx_ring_size = HIF_TX_DESC_NT;
/* NOTE: must be 64bit aligned */
bd_va = (struct buf_desc *)(pfe_addr->ddr_pfe_baseaddr
+ TX_BD_BASEADDR);
bd_pa = (struct buf_desc *)(pfe_addr->ddr_pfe_phys_baseaddr
+ TX_BD_BASEADDR);
tx_desc->tx_base_pa = (unsigned long)bd_pa;
tx_desc->tx_base = bd_va;
debug("%s: Tx desc_base: %p, base_pa: %08x, desc_count: %d\n",
__func__, tx_desc->tx_base, tx_desc->tx_base_pa,
tx_desc->tx_ring_size);
memset(bd_va, 0, sizeof(struct buf_desc) * tx_desc->tx_ring_size);
tx_buf_pa = pfe_addr->ddr_pfe_phys_baseaddr + HIF_TX_PKT_DDR_BASEADDR;
for (i = 0; i < tx_desc->tx_ring_size; i++) {
writel((unsigned long)(bd_pa + 1), &bd_va->next);
writel(tx_buf_pa + (i * MAX_FRAME_SIZE), &bd_va->data);
bd_va++;
bd_pa++;
}
--bd_va;
writel((u32)tx_desc->tx_base_pa, &bd_va->next);
writel(tx_desc->tx_base_pa, HIF_TX_BDP_ADDR);
g_tx_desc = tx_desc;
return 0;
}
/*
* PFE/Class initialization.
*/
static void pfe_class_init(struct pfe_ddr_address *pfe_addr)
{
struct class_cfg class_cfg = {
.route_table_baseaddr = pfe_addr->ddr_pfe_phys_baseaddr +
ROUTE_TABLE_BASEADDR,
.route_table_hash_bits = ROUTE_TABLE_HASH_BITS,
};
class_init(&class_cfg);
debug("class init complete\n");
}
/*
* PFE/TMU initialization.
*/
static void pfe_tmu_init(struct pfe_ddr_address *pfe_addr)
{
struct tmu_cfg tmu_cfg = {
.llm_base_addr = pfe_addr->ddr_pfe_phys_baseaddr
+ TMU_LLM_BASEADDR,
.llm_queue_len = TMU_LLM_QUEUE_LEN,
};
tmu_init(&tmu_cfg);
debug("tmu init complete\n");
}
/*
* PFE/BMU (both BMU1 & BMU2) initialization.
*/
static void pfe_bmu_init(struct pfe_ddr_address *pfe_addr)
{
struct bmu_cfg bmu1_cfg = {
.baseaddr = CBUS_VIRT_TO_PFE(LMEM_BASE_ADDR +
BMU1_LMEM_BASEADDR),
.count = BMU1_BUF_COUNT,
.size = BMU1_BUF_SIZE,
};
struct bmu_cfg bmu2_cfg = {
.baseaddr = pfe_addr->ddr_pfe_phys_baseaddr + BMU2_DDR_BASEADDR,
.count = BMU2_BUF_COUNT,
.size = BMU2_BUF_SIZE,
};
bmu_init(BMU1_BASE_ADDR, &bmu1_cfg);
debug("bmu1 init: done\n");
bmu_init(BMU2_BASE_ADDR, &bmu2_cfg);
debug("bmu2 init: done\n");
}
/*
* PFE/GPI initialization function.
* - egpi1, egpi2, egpi3, hgpi
*/
static void pfe_gpi_init(struct pfe_ddr_address *pfe_addr)
{
struct gpi_cfg egpi1_cfg = {
.lmem_rtry_cnt = EGPI1_LMEM_RTRY_CNT,
.tmlf_txthres = EGPI1_TMLF_TXTHRES,
.aseq_len = EGPI1_ASEQ_LEN,
};
struct gpi_cfg egpi2_cfg = {
.lmem_rtry_cnt = EGPI2_LMEM_RTRY_CNT,
.tmlf_txthres = EGPI2_TMLF_TXTHRES,
.aseq_len = EGPI2_ASEQ_LEN,
};
struct gpi_cfg hgpi_cfg = {
.lmem_rtry_cnt = HGPI_LMEM_RTRY_CNT,
.tmlf_txthres = HGPI_TMLF_TXTHRES,
.aseq_len = HGPI_ASEQ_LEN,
};
gpi_init(EGPI1_BASE_ADDR, &egpi1_cfg);
debug("GPI1 init complete\n");
gpi_init(EGPI2_BASE_ADDR, &egpi2_cfg);
debug("GPI2 init complete\n");
gpi_init(HGPI_BASE_ADDR, &hgpi_cfg);
debug("HGPI init complete\n");
}
/*
* PFE/HIF initialization function.
*/
static int pfe_hif_init(struct pfe_ddr_address *pfe_addr)
{
int ret = 0;
hif_tx_disable();
hif_rx_disable();
ret = hif_tx_desc_init(pfe_addr);
if (ret)
return ret;
ret = hif_rx_desc_init(pfe_addr);
if (ret)
return ret;
hif_init();
hif_tx_enable();
hif_rx_enable();
hif_rx_desc_dump();
hif_tx_desc_dump();
debug("HIF init complete\n");
return ret;
}
/*
* PFE initialization
* - Firmware loading (CLASS-PE and TMU-PE)
* - BMU1 and BMU2 init
* - GEMAC init
* - GPI init
* - CLASS-PE init
* - TMU-PE init
* - HIF tx and rx descriptors init
*
* @param[in] edev Pointer to eth device structure.
*
* @return 0, on success.
*/
static int pfe_hw_init(struct pfe_ddr_address *pfe_addr)
{
int ret = 0;
debug("%s: start\n", __func__);
writel(0x3, CLASS_PE_SYS_CLK_RATIO);
writel(0x3, TMU_PE_SYS_CLK_RATIO);
writel(0x3, UTIL_PE_SYS_CLK_RATIO);
udelay(10);
pfe_class_init(pfe_addr);
pfe_tmu_init(pfe_addr);
pfe_bmu_init(pfe_addr);
pfe_gpi_init(pfe_addr);
ret = pfe_hif_init(pfe_addr);
if (ret)
return ret;
bmu_enable(BMU1_BASE_ADDR);
debug("bmu1 enabled\n");
bmu_enable(BMU2_BASE_ADDR);
debug("bmu2 enabled\n");
debug("%s: done\n", __func__);
return ret;
}
/*
* PFE driver init function.
* - Initializes pfe_lib
* - pfe hw init
* - fw loading and enables PEs
* - should be executed once.
*
* @param[in] pfe Pointer the pfe control block
*/
int pfe_drv_init(struct pfe_ddr_address *pfe_addr)
{
int ret = 0;
pfe_lib_init();
ret = pfe_hw_init(pfe_addr);
if (ret)
return ret;
/* Load the class,TM, Util fw.
* By now pfe is:
* - out of reset + disabled + configured.
* Fw loading should be done after pfe_hw_init()
*/
/* It loads default inbuilt sbl firmware */
pfe_firmware_init();
return ret;
}
/*
* PFE remove function
* - stops PEs
* - frees tx/rx descriptor resources
* - should be called once.
*
* @param[in] pfe Pointer to pfe control block.
*/
int pfe_eth_remove(struct udevice *dev)
{
if (g_tx_desc)
free(g_tx_desc);
if (g_rx_desc)
free(g_rx_desc);
pfe_firmware_exit();
return 0;
}