#include <linux/bitfield.h>
#include <linux/circ_buf.h>
#include <linux/device.h>
#include <linux/firmware.h>
#include <linux/iopoll.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#include "prestera.h"
#define PRESTERA_MSG_MAX_SIZE 1500
#define PRESTERA_SUPP_FW_MAJ_VER 4
#define PRESTERA_SUPP_FW_MIN_VER 1
#define PRESTERA_PREV_FW_MAJ_VER 4
#define PRESTERA_PREV_FW_MIN_VER 0
#define PRESTERA_FW_PATH_FMT "mrvl/prestera/mvsw_prestera_fw-v%u.%u.img"
#define PRESTERA_FW_ARM64_PATH_FMT "mrvl/prestera/mvsw_prestera_fw_arm64-v%u.%u.img"
#define PRESTERA_FW_HDR_MAGIC 0x351D9D06
#define PRESTERA_FW_DL_TIMEOUT_MS 50000
#define PRESTERA_FW_BLK_SZ 1024
#define PRESTERA_FW_VER_MAJ_MUL 1000000
#define PRESTERA_FW_VER_MIN_MUL 1000
#define PRESTERA_FW_VER_MAJ(v) ((v) / PRESTERA_FW_VER_MAJ_MUL)
#define PRESTERA_FW_VER_MIN(v) \
(((v) - (PRESTERA_FW_VER_MAJ(v) * PRESTERA_FW_VER_MAJ_MUL)) / \
PRESTERA_FW_VER_MIN_MUL)
#define PRESTERA_FW_VER_PATCH(v) \
((v) - (PRESTERA_FW_VER_MAJ(v) * PRESTERA_FW_VER_MAJ_MUL) - \
(PRESTERA_FW_VER_MIN(v) * PRESTERA_FW_VER_MIN_MUL))
enum prestera_pci_bar_t {
PRESTERA_PCI_BAR_FW = 2,
PRESTERA_PCI_BAR_PP = 4,
};
struct prestera_fw_header {
__be32 magic_number;
__be32 version_value;
u8 reserved[8];
};
struct prestera_ldr_regs {
u32 ldr_ready;
u32 pad1;
u32 ldr_img_size;
u32 ldr_ctl_flags;
u32 ldr_buf_offs;
u32 ldr_buf_size;
u32 ldr_buf_rd;
u32 pad2;
u32 ldr_buf_wr;
u32 ldr_status;
};
#define PRESTERA_LDR_REG_OFFSET(f) offsetof(struct prestera_ldr_regs, f)
#define PRESTERA_LDR_READY_MAGIC 0xf00dfeed
#define PRESTERA_LDR_STATUS_IMG_DL BIT(0)
#define PRESTERA_LDR_STATUS_START_FW BIT(1)
#define PRESTERA_LDR_STATUS_INVALID_IMG BIT(2)
#define PRESTERA_LDR_STATUS_NOMEM BIT(3)
#define PRESTERA_LDR_REG_BASE(fw) ((fw)->ldr_regs)
#define PRESTERA_LDR_REG_ADDR(fw, reg) (PRESTERA_LDR_REG_BASE(fw) + (reg))
#define PRESTERA_LDR_READY_REG PRESTERA_LDR_REG_OFFSET(ldr_ready)
#define PRESTERA_LDR_IMG_SIZE_REG PRESTERA_LDR_REG_OFFSET(ldr_img_size)
#define PRESTERA_LDR_CTL_REG PRESTERA_LDR_REG_OFFSET(ldr_ctl_flags)
#define PRESTERA_LDR_BUF_SIZE_REG PRESTERA_LDR_REG_OFFSET(ldr_buf_size)
#define PRESTERA_LDR_BUF_OFFS_REG PRESTERA_LDR_REG_OFFSET(ldr_buf_offs)
#define PRESTERA_LDR_BUF_RD_REG PRESTERA_LDR_REG_OFFSET(ldr_buf_rd)
#define PRESTERA_LDR_BUF_WR_REG PRESTERA_LDR_REG_OFFSET(ldr_buf_wr)
#define PRESTERA_LDR_STATUS_REG PRESTERA_LDR_REG_OFFSET(ldr_status)
#define PRESTERA_LDR_CTL_DL_START BIT(0)
#define PRESTERA_EVT_QNUM_MAX 4
struct prestera_fw_evtq_regs {
u32 rd_idx;
u32 pad1;
u32 wr_idx;
u32 pad2;
u32 offs;
u32 len;
};
#define PRESTERA_CMD_QNUM_MAX 4
struct prestera_fw_cmdq_regs {
u32 req_ctl;
u32 req_len;
u32 rcv_ctl;
u32 rcv_len;
u32 offs;
u32 len;
};
struct prestera_fw_regs {
u32 fw_ready;
u32 cmd_offs;
u32 cmd_len;
u32 cmd_qnum;
u32 evt_offs;
u32 evt_qnum;
u32 fw_status;
u32 rx_status;
struct prestera_fw_cmdq_regs cmdq_list[PRESTERA_EVT_QNUM_MAX];
struct prestera_fw_evtq_regs evtq_list[PRESTERA_CMD_QNUM_MAX];
};
#define PRESTERA_FW_REG_OFFSET(f) offsetof(struct prestera_fw_regs, f)
#define PRESTERA_FW_READY_MAGIC 0xcafebabe
#define PRESTERA_FW_READY_REG PRESTERA_FW_REG_OFFSET(fw_ready)
#define PRESTERA_CMD_BUF_OFFS_REG PRESTERA_FW_REG_OFFSET(cmd_offs)
#define PRESTERA_CMD_BUF_LEN_REG PRESTERA_FW_REG_OFFSET(cmd_len)
#define PRESTERA_CMD_QNUM_REG PRESTERA_FW_REG_OFFSET(cmd_qnum)
#define PRESTERA_EVT_BUF_OFFS_REG PRESTERA_FW_REG_OFFSET(evt_offs)
#define PRESTERA_EVT_QNUM_REG PRESTERA_FW_REG_OFFSET(evt_qnum)
#define PRESTERA_CMDQ_REG_OFFSET(q, f) \
(PRESTERA_FW_REG_OFFSET(cmdq_list) + \
(q) * sizeof(struct prestera_fw_cmdq_regs) + \
offsetof(struct prestera_fw_cmdq_regs, f))
#define PRESTERA_CMDQ_REQ_CTL_REG(q) PRESTERA_CMDQ_REG_OFFSET(q, req_ctl)
#define PRESTERA_CMDQ_REQ_LEN_REG(q) PRESTERA_CMDQ_REG_OFFSET(q, req_len)
#define PRESTERA_CMDQ_RCV_CTL_REG(q) PRESTERA_CMDQ_REG_OFFSET(q, rcv_ctl)
#define PRESTERA_CMDQ_RCV_LEN_REG(q) PRESTERA_CMDQ_REG_OFFSET(q, rcv_len)
#define PRESTERA_CMDQ_OFFS_REG(q) PRESTERA_CMDQ_REG_OFFSET(q, offs)
#define PRESTERA_CMDQ_LEN_REG(q) PRESTERA_CMDQ_REG_OFFSET(q, len)
#define PRESTERA_FW_STATUS_REG PRESTERA_FW_REG_OFFSET(fw_status)
#define PRESTERA_RX_STATUS_REG PRESTERA_FW_REG_OFFSET(rx_status)
#define PRESTERA_CMD_F_REQ_SENT BIT(0)
#define PRESTERA_CMD_F_REPL_RCVD BIT(1)
#define PRESTERA_CMD_F_REPL_SENT BIT(0)
#define PRESTERA_FW_EVT_CTL_STATUS_MASK GENMASK(1, 0)
#define PRESTERA_FW_EVT_CTL_STATUS_ON 0
#define PRESTERA_FW_EVT_CTL_STATUS_OFF 1
#define PRESTERA_EVTQ_REG_OFFSET(q, f) \
(PRESTERA_FW_REG_OFFSET(evtq_list) + \
(q) * sizeof(struct prestera_fw_evtq_regs) + \
offsetof(struct prestera_fw_evtq_regs, f))
#define PRESTERA_EVTQ_RD_IDX_REG(q) PRESTERA_EVTQ_REG_OFFSET(q, rd_idx)
#define PRESTERA_EVTQ_WR_IDX_REG(q) PRESTERA_EVTQ_REG_OFFSET(q, wr_idx)
#define PRESTERA_EVTQ_OFFS_REG(q) PRESTERA_EVTQ_REG_OFFSET(q, offs)
#define PRESTERA_EVTQ_LEN_REG(q) PRESTERA_EVTQ_REG_OFFSET(q, len)
#define PRESTERA_FW_REG_BASE(fw) ((fw)->dev.ctl_regs)
#define PRESTERA_FW_REG_ADDR(fw, reg) PRESTERA_FW_REG_BASE((fw)) + (reg)
#define PRESTERA_FW_CMD_DEFAULT_WAIT_MS 30000
#define PRESTERA_FW_READY_WAIT_MS 20000
#define PRESTERA_DEV_ID_AC3X_98DX_55 0xC804
#define PRESTERA_DEV_ID_AC3X_98DX_65 0xC80C
#define PRESTERA_DEV_ID_ALDRIN2 0xCC1E
#define PRESTERA_DEV_ID_98DX7312M 0x981F
#define PRESTERA_DEV_ID_98DX3500 0x9820
#define PRESTERA_DEV_ID_98DX3501 0x9826
#define PRESTERA_DEV_ID_98DX3510 0x9821
#define PRESTERA_DEV_ID_98DX3520 0x9822
struct prestera_fw_evtq {
u8 __iomem *addr;
size_t len;
};
struct prestera_fw_cmdq {
struct mutex cmd_mtx;
u8 __iomem *addr;
size_t len;
};
struct prestera_fw {
struct prestera_fw_rev rev_supp;
const struct firmware *bin;
struct workqueue_struct *wq;
struct prestera_device dev;
struct pci_dev *pci_dev;
u8 __iomem *ldr_regs;
u8 __iomem *ldr_ring_buf;
u32 ldr_buf_len;
u32 ldr_wr_idx;
size_t cmd_mbox_len;
u8 __iomem *cmd_mbox;
struct prestera_fw_cmdq cmd_queue[PRESTERA_CMD_QNUM_MAX];
u8 cmd_qnum;
struct prestera_fw_evtq evt_queue[PRESTERA_EVT_QNUM_MAX];
u8 evt_qnum;
struct work_struct evt_work;
u8 __iomem *evt_buf;
u8 *evt_msg;
};
static int prestera_fw_load(struct prestera_fw *fw);
static void prestera_fw_write(struct prestera_fw *fw, u32 reg, u32 val)
{
writel(val, PRESTERA_FW_REG_ADDR(fw, reg));
}
static u32 prestera_fw_read(struct prestera_fw *fw, u32 reg)
{
return readl(PRESTERA_FW_REG_ADDR(fw, reg));
}
static u32 prestera_fw_evtq_len(struct prestera_fw *fw, u8 qid)
{
return fw->evt_queue[qid].len;
}
static u32 prestera_fw_evtq_avail(struct prestera_fw *fw, u8 qid)
{
u32 wr_idx = prestera_fw_read(fw, PRESTERA_EVTQ_WR_IDX_REG(qid));
u32 rd_idx = prestera_fw_read(fw, PRESTERA_EVTQ_RD_IDX_REG(qid));
return CIRC_CNT(wr_idx, rd_idx, prestera_fw_evtq_len(fw, qid));
}
static void prestera_fw_evtq_rd_set(struct prestera_fw *fw,
u8 qid, u32 idx)
{
u32 rd_idx = idx & (prestera_fw_evtq_len(fw, qid) - 1);
prestera_fw_write(fw, PRESTERA_EVTQ_RD_IDX_REG(qid), rd_idx);
}
static u8 __iomem *prestera_fw_evtq_buf(struct prestera_fw *fw, u8 qid)
{
return fw->evt_queue[qid].addr;
}
static u32 prestera_fw_evtq_read32(struct prestera_fw *fw, u8 qid)
{
u32 rd_idx = prestera_fw_read(fw, PRESTERA_EVTQ_RD_IDX_REG(qid));
u32 val;
val = readl(prestera_fw_evtq_buf(fw, qid) + rd_idx);
prestera_fw_evtq_rd_set(fw, qid, rd_idx + 4);
return val;
}
static ssize_t prestera_fw_evtq_read_buf(struct prestera_fw *fw,
u8 qid, void *buf, size_t len)
{
u32 idx = prestera_fw_read(fw, PRESTERA_EVTQ_RD_IDX_REG(qid));
u8 __iomem *evtq_addr = prestera_fw_evtq_buf(fw, qid);
u32 *buf32 = buf;
int i;
for (i = 0; i < len / 4; buf32++, i++) {
*buf32 = readl_relaxed(evtq_addr + idx);
idx = (idx + 4) & (prestera_fw_evtq_len(fw, qid) - 1);
}
prestera_fw_evtq_rd_set(fw, qid, idx);
return i;
}
static u8 prestera_fw_evtq_pick(struct prestera_fw *fw)
{
int qid;
for (qid = 0; qid < fw->evt_qnum; qid++) {
if (prestera_fw_evtq_avail(fw, qid) >= 4)
return qid;
}
return PRESTERA_EVT_QNUM_MAX;
}
static void prestera_fw_evt_ctl_status_set(struct prestera_fw *fw, u32 val)
{
u32 status = prestera_fw_read(fw, PRESTERA_FW_STATUS_REG);
u32p_replace_bits(&status, val, PRESTERA_FW_EVT_CTL_STATUS_MASK);
prestera_fw_write(fw, PRESTERA_FW_STATUS_REG, status);
}
static void prestera_fw_evt_work_fn(struct work_struct *work)
{
struct prestera_fw *fw;
void *msg;
u8 qid;
fw = container_of(work, struct prestera_fw, evt_work);
msg = fw->evt_msg;
prestera_fw_evt_ctl_status_set(fw, PRESTERA_FW_EVT_CTL_STATUS_OFF);
while ((qid = prestera_fw_evtq_pick(fw)) < PRESTERA_EVT_QNUM_MAX) {
u32 idx;
u32 len;
len = prestera_fw_evtq_read32(fw, qid);
idx = prestera_fw_read(fw, PRESTERA_EVTQ_RD_IDX_REG(qid));
WARN_ON(prestera_fw_evtq_avail(fw, qid) < len);
if (WARN_ON(len > PRESTERA_MSG_MAX_SIZE)) {
prestera_fw_evtq_rd_set(fw, qid, idx + len);
continue;
}
prestera_fw_evtq_read_buf(fw, qid, msg, len);
if (fw->dev.recv_msg)
fw->dev.recv_msg(&fw->dev, msg, len);
}
prestera_fw_evt_ctl_status_set(fw, PRESTERA_FW_EVT_CTL_STATUS_ON);
}
static int prestera_fw_wait_reg32(struct prestera_fw *fw, u32 reg, u32 cmp,
unsigned int waitms)
{
u8 __iomem *addr = PRESTERA_FW_REG_ADDR(fw, reg);
u32 val;
return readl_poll_timeout(addr, val, cmp == val,
1 * USEC_PER_MSEC, waitms * USEC_PER_MSEC);
}
static void prestera_fw_cmdq_lock(struct prestera_fw *fw, u8 qid)
{
mutex_lock(&fw->cmd_queue[qid].cmd_mtx);
}
static void prestera_fw_cmdq_unlock(struct prestera_fw *fw, u8 qid)
{
mutex_unlock(&fw->cmd_queue[qid].cmd_mtx);
}
static u32 prestera_fw_cmdq_len(struct prestera_fw *fw, u8 qid)
{
return fw->cmd_queue[qid].len;
}
static u8 __iomem *prestera_fw_cmdq_buf(struct prestera_fw *fw, u8 qid)
{
return fw->cmd_queue[qid].addr;
}
static int prestera_fw_cmd_send(struct prestera_fw *fw, int qid,
void *in_msg, size_t in_size,
void *out_msg, size_t out_size,
unsigned int waitms)
{
u32 ret_size;
int err;
if (!waitms)
waitms = PRESTERA_FW_CMD_DEFAULT_WAIT_MS;
if (ALIGN(in_size, 4) > prestera_fw_cmdq_len(fw, qid))
return -EMSGSIZE;
err = prestera_fw_wait_reg32(fw, PRESTERA_CMDQ_RCV_CTL_REG(qid), 0, 30);
if (err) {
dev_err(fw->dev.dev, "finish reply from FW is timed out\n");
return err;
}
prestera_fw_write(fw, PRESTERA_CMDQ_REQ_LEN_REG(qid), in_size);
memcpy_toio(prestera_fw_cmdq_buf(fw, qid), in_msg, in_size);
prestera_fw_write(fw, PRESTERA_CMDQ_REQ_CTL_REG(qid),
PRESTERA_CMD_F_REQ_SENT);
err = prestera_fw_wait_reg32(fw, PRESTERA_CMDQ_RCV_CTL_REG(qid),
PRESTERA_CMD_F_REPL_SENT, waitms);
if (err) {
dev_err(fw->dev.dev, "reply from FW is timed out\n");
goto cmd_exit;
}
ret_size = prestera_fw_read(fw, PRESTERA_CMDQ_RCV_LEN_REG(qid));
if (ret_size > out_size) {
dev_err(fw->dev.dev, "ret_size (%u) > out_len(%zu)\n",
ret_size, out_size);
err = -EMSGSIZE;
goto cmd_exit;
}
memcpy_fromio(out_msg,
prestera_fw_cmdq_buf(fw, qid) + in_size, ret_size);
cmd_exit:
prestera_fw_write(fw, PRESTERA_CMDQ_REQ_CTL_REG(qid),
PRESTERA_CMD_F_REPL_RCVD);
return err;
}
static int prestera_fw_send_req(struct prestera_device *dev, int qid,
void *in_msg, size_t in_size, void *out_msg,
size_t out_size, unsigned int waitms)
{
struct prestera_fw *fw;
ssize_t ret;
fw = container_of(dev, struct prestera_fw, dev);
prestera_fw_cmdq_lock(fw, qid);
ret = prestera_fw_cmd_send(fw, qid, in_msg, in_size, out_msg, out_size,
waitms);
prestera_fw_cmdq_unlock(fw, qid);
return ret;
}
static int prestera_fw_init(struct prestera_fw *fw)
{
u8 __iomem *base;
int err;
u8 qid;
fw->dev.send_req = prestera_fw_send_req;
fw->ldr_regs = fw->dev.ctl_regs;
err = prestera_fw_load(fw);
if (err)
return err;
err = prestera_fw_wait_reg32(fw, PRESTERA_FW_READY_REG,
PRESTERA_FW_READY_MAGIC,
PRESTERA_FW_READY_WAIT_MS);
if (err) {
dev_err(fw->dev.dev, "FW failed to start\n");
return err;
}
base = fw->dev.ctl_regs;
fw->cmd_mbox = base + prestera_fw_read(fw, PRESTERA_CMD_BUF_OFFS_REG);
fw->cmd_mbox_len = prestera_fw_read(fw, PRESTERA_CMD_BUF_LEN_REG);
fw->cmd_qnum = prestera_fw_read(fw, PRESTERA_CMD_QNUM_REG);
for (qid = 0; qid < fw->cmd_qnum; qid++) {
u32 offs = prestera_fw_read(fw, PRESTERA_CMDQ_OFFS_REG(qid));
struct prestera_fw_cmdq *cmdq = &fw->cmd_queue[qid];
cmdq->len = prestera_fw_read(fw, PRESTERA_CMDQ_LEN_REG(qid));
cmdq->addr = fw->cmd_mbox + offs;
mutex_init(&cmdq->cmd_mtx);
}
fw->evt_buf = base + prestera_fw_read(fw, PRESTERA_EVT_BUF_OFFS_REG);
fw->evt_qnum = prestera_fw_read(fw, PRESTERA_EVT_QNUM_REG);
fw->evt_msg = kmalloc(PRESTERA_MSG_MAX_SIZE, GFP_KERNEL);
if (!fw->evt_msg)
return -ENOMEM;
for (qid = 0; qid < fw->evt_qnum; qid++) {
u32 offs = prestera_fw_read(fw, PRESTERA_EVTQ_OFFS_REG(qid));
struct prestera_fw_evtq *evtq = &fw->evt_queue[qid];
evtq->len = prestera_fw_read(fw, PRESTERA_EVTQ_LEN_REG(qid));
evtq->addr = fw->evt_buf + offs;
}
return 0;
}
static void prestera_fw_uninit(struct prestera_fw *fw)
{
kfree(fw->evt_msg);
}
static irqreturn_t prestera_pci_irq_handler(int irq, void *dev_id)
{
struct prestera_fw *fw = dev_id;
if (prestera_fw_read(fw, PRESTERA_RX_STATUS_REG)) {
prestera_fw_write(fw, PRESTERA_RX_STATUS_REG, 0);
if (fw->dev.recv_pkt)
fw->dev.recv_pkt(&fw->dev);
}
queue_work(fw->wq, &fw->evt_work);
return IRQ_HANDLED;
}
static void prestera_ldr_write(struct prestera_fw *fw, u32 reg, u32 val)
{
writel(val, PRESTERA_LDR_REG_ADDR(fw, reg));
}
static u32 prestera_ldr_read(struct prestera_fw *fw, u32 reg)
{
return readl(PRESTERA_LDR_REG_ADDR(fw, reg));
}
static int prestera_ldr_wait_reg32(struct prestera_fw *fw,
u32 reg, u32 cmp, unsigned int waitms)
{
u8 __iomem *addr = PRESTERA_LDR_REG_ADDR(fw, reg);
u32 val;
return readl_poll_timeout(addr, val, cmp == val,
10 * USEC_PER_MSEC, waitms * USEC_PER_MSEC);
}
static int prestera_ldr_wait_buf(struct prestera_fw *fw, size_t len)
{
u8 __iomem *addr = PRESTERA_LDR_REG_ADDR(fw, PRESTERA_LDR_BUF_RD_REG);
u32 buf_len = fw->ldr_buf_len;
u32 wr_idx = fw->ldr_wr_idx;
u32 rd_idx;
return readl_poll_timeout(addr, rd_idx,
CIRC_SPACE(wr_idx, rd_idx, buf_len) >= len,
1 * USEC_PER_MSEC, 100 * USEC_PER_MSEC);
}
static int prestera_ldr_wait_dl_finish(struct prestera_fw *fw)
{
u8 __iomem *addr = PRESTERA_LDR_REG_ADDR(fw, PRESTERA_LDR_STATUS_REG);
unsigned long mask = ~(PRESTERA_LDR_STATUS_IMG_DL);
u32 val;
int err;
err = readl_poll_timeout(addr, val, val & mask, 10 * USEC_PER_MSEC,
PRESTERA_FW_DL_TIMEOUT_MS * USEC_PER_MSEC);
if (err) {
dev_err(fw->dev.dev, "Timeout to load FW img [state=%d]",
prestera_ldr_read(fw, PRESTERA_LDR_STATUS_REG));
return err;
}
return 0;
}
static void prestera_ldr_wr_idx_move(struct prestera_fw *fw, unsigned int n)
{
fw->ldr_wr_idx = (fw->ldr_wr_idx + (n)) & (fw->ldr_buf_len - 1);
}
static void prestera_ldr_wr_idx_commit(struct prestera_fw *fw)
{
prestera_ldr_write(fw, PRESTERA_LDR_BUF_WR_REG, fw->ldr_wr_idx);
}
static u8 __iomem *prestera_ldr_wr_ptr(struct prestera_fw *fw)
{
return fw->ldr_ring_buf + fw->ldr_wr_idx;
}
static int prestera_ldr_send(struct prestera_fw *fw, const u8 *buf, size_t len)
{
int err;
int i;
err = prestera_ldr_wait_buf(fw, len);
if (err) {
dev_err(fw->dev.dev, "failed wait for sending firmware\n");
return err;
}
for (i = 0; i < len; i += 4) {
writel_relaxed(*(u32 *)(buf + i), prestera_ldr_wr_ptr(fw));
prestera_ldr_wr_idx_move(fw, 4);
}
prestera_ldr_wr_idx_commit(fw);
return 0;
}
static int prestera_ldr_fw_send(struct prestera_fw *fw,
const char *img, u32 fw_size)
{
u32 status;
u32 pos;
int err;
err = prestera_ldr_wait_reg32(fw, PRESTERA_LDR_STATUS_REG,
PRESTERA_LDR_STATUS_IMG_DL,
5 * MSEC_PER_SEC);
if (err) {
dev_err(fw->dev.dev, "Loader is not ready to load image\n");
return err;
}
for (pos = 0; pos < fw_size; pos += PRESTERA_FW_BLK_SZ) {
if (pos + PRESTERA_FW_BLK_SZ > fw_size)
break;
err = prestera_ldr_send(fw, img + pos, PRESTERA_FW_BLK_SZ);
if (err)
return err;
}
if (pos < fw_size) {
err = prestera_ldr_send(fw, img + pos, fw_size - pos);
if (err)
return err;
}
err = prestera_ldr_wait_dl_finish(fw);
if (err)
return err;
status = prestera_ldr_read(fw, PRESTERA_LDR_STATUS_REG);
switch (status) {
case PRESTERA_LDR_STATUS_INVALID_IMG:
dev_err(fw->dev.dev, "FW img has bad CRC\n");
return -EINVAL;
case PRESTERA_LDR_STATUS_NOMEM:
dev_err(fw->dev.dev, "Loader has no enough mem\n");
return -ENOMEM;
}
return 0;
}
static void prestera_fw_rev_parse(const struct prestera_fw_header *hdr,
struct prestera_fw_rev *rev)
{
u32 version = be32_to_cpu(hdr->version_value);
rev->maj = PRESTERA_FW_VER_MAJ(version);
rev->min = PRESTERA_FW_VER_MIN(version);
rev->sub = PRESTERA_FW_VER_PATCH(version);
}
static int prestera_fw_rev_check(struct prestera_fw *fw)
{
struct prestera_fw_rev *rev = &fw->dev.fw_rev;
if (rev->maj == fw->rev_supp.maj && rev->min >= fw->rev_supp.min)
return 0;
dev_err(fw->dev.dev, "Driver supports FW version only '%u.%u.x'",
fw->rev_supp.maj, fw->rev_supp.min);
return -EINVAL;
}
static int prestera_fw_hdr_parse(struct prestera_fw *fw)
{
struct prestera_fw_rev *rev = &fw->dev.fw_rev;
struct prestera_fw_header *hdr;
u32 magic;
hdr = (struct prestera_fw_header *)fw->bin->data;
magic = be32_to_cpu(hdr->magic_number);
if (magic != PRESTERA_FW_HDR_MAGIC) {
dev_err(fw->dev.dev, "FW img hdr magic is invalid");
return -EINVAL;
}
prestera_fw_rev_parse(hdr, rev);
dev_info(fw->dev.dev, "FW version '%u.%u.%u'\n",
rev->maj, rev->min, rev->sub);
return prestera_fw_rev_check(fw);
}
static const char *prestera_fw_path_fmt_get(struct prestera_fw *fw)
{
switch (fw->pci_dev->device) {
case PRESTERA_DEV_ID_98DX3500:
case PRESTERA_DEV_ID_98DX3501:
case PRESTERA_DEV_ID_98DX3510:
case PRESTERA_DEV_ID_98DX3520:
return PRESTERA_FW_ARM64_PATH_FMT;
default:
return PRESTERA_FW_PATH_FMT;
}
}
static int prestera_fw_get(struct prestera_fw *fw)
{
int ver_maj = PRESTERA_SUPP_FW_MAJ_VER;
int ver_min = PRESTERA_SUPP_FW_MIN_VER;
char fw_path[128];
int err;
pick_fw_ver:
snprintf(fw_path, sizeof(fw_path), prestera_fw_path_fmt_get(fw),
ver_maj, ver_min);
err = request_firmware_direct(&fw->bin, fw_path, fw->dev.dev);
if (err) {
if (ver_maj != PRESTERA_PREV_FW_MAJ_VER ||
ver_min != PRESTERA_PREV_FW_MIN_VER) {
ver_maj = PRESTERA_PREV_FW_MAJ_VER;
ver_min = PRESTERA_PREV_FW_MIN_VER;
dev_warn(fw->dev.dev,
"missing latest %s firmware, fall-back to previous %u.%u version\n",
fw_path, ver_maj, ver_min);
goto pick_fw_ver;
} else {
dev_err(fw->dev.dev, "failed to request previous firmware: %s\n",
fw_path);
return err;
}
}
dev_info(fw->dev.dev, "Loading %s ...", fw_path);
fw->rev_supp.maj = ver_maj;
fw->rev_supp.min = ver_min;
fw->rev_supp.sub = 0;
return 0;
}
static void prestera_fw_put(struct prestera_fw *fw)
{
release_firmware(fw->bin);
}
static int prestera_fw_load(struct prestera_fw *fw)
{
size_t hlen = sizeof(struct prestera_fw_header);
int err;
err = prestera_ldr_wait_reg32(fw, PRESTERA_LDR_READY_REG,
PRESTERA_LDR_READY_MAGIC,
5 * MSEC_PER_SEC);
if (err) {
dev_err(fw->dev.dev, "waiting for FW loader is timed out");
return err;
}
fw->ldr_ring_buf = fw->ldr_regs +
prestera_ldr_read(fw, PRESTERA_LDR_BUF_OFFS_REG);
fw->ldr_buf_len =
prestera_ldr_read(fw, PRESTERA_LDR_BUF_SIZE_REG);
fw->ldr_wr_idx = 0;
err = prestera_fw_get(fw);
if (err)
return err;
err = prestera_fw_hdr_parse(fw);
if (err) {
dev_err(fw->dev.dev, "FW image header is invalid\n");
goto out_release;
}
prestera_ldr_write(fw, PRESTERA_LDR_IMG_SIZE_REG, fw->bin->size - hlen);
prestera_ldr_write(fw, PRESTERA_LDR_CTL_REG, PRESTERA_LDR_CTL_DL_START);
err = prestera_ldr_fw_send(fw, fw->bin->data + hlen,
fw->bin->size - hlen);
out_release:
prestera_fw_put(fw);
return err;
}
static bool prestera_pci_pp_use_bar2(struct pci_dev *pdev)
{
switch (pdev->device) {
case PRESTERA_DEV_ID_98DX7312M:
case PRESTERA_DEV_ID_98DX3500:
case PRESTERA_DEV_ID_98DX3501:
case PRESTERA_DEV_ID_98DX3510:
case PRESTERA_DEV_ID_98DX3520:
return true;
default:
return false;
}
}
static u32 prestera_pci_pp_bar2_offs(struct pci_dev *pdev)
{
if (pci_resource_len(pdev, 2) == 0x1000000)
return 0x0;
else
return (pci_resource_len(pdev, 2) / 2);
}
static u32 prestera_pci_fw_bar2_offs(struct pci_dev *pdev)
{
if (pci_resource_len(pdev, 2) == 0x1000000)
return 0x400000;
else
return 0x0;
}
static int prestera_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *id)
{
const char *driver_name = dev_driver_string(&pdev->dev);
u8 __iomem *mem_addr, *pp_addr = NULL;
struct prestera_fw *fw;
int err;
err = pcim_enable_device(pdev);
if (err) {
dev_err(&pdev->dev, "pci_enable_device failed\n");
goto err_pci_enable_device;
}
err = pcim_request_all_regions(pdev, driver_name);
if (err) {
dev_err(&pdev->dev, "pcim_request_all_regions failed\n");
goto err_pci_request_regions;
}
err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(30));
if (err) {
dev_err(&pdev->dev, "fail to set DMA mask\n");
goto err_dma_mask;
}
mem_addr = pcim_iomap(pdev, 2, 0);
if (!mem_addr) {
dev_err(&pdev->dev, "pci mem ioremap failed\n");
err = -EIO;
goto err_mem_ioremap;
}
if (prestera_pci_pp_use_bar2(pdev)) {
pp_addr = mem_addr + prestera_pci_pp_bar2_offs(pdev);
mem_addr = mem_addr + prestera_pci_fw_bar2_offs(pdev);
} else {
pp_addr = pcim_iomap(pdev, 4, 0);
if (!pp_addr) {
dev_err(&pdev->dev, "pp regs ioremap failed\n");
err = -EIO;
goto err_pp_ioremap;
}
}
pci_set_master(pdev);
fw = devm_kzalloc(&pdev->dev, sizeof(*fw), GFP_KERNEL);
if (!fw) {
err = -ENOMEM;
goto err_pci_dev_alloc;
}
fw->pci_dev = pdev;
fw->dev.ctl_regs = mem_addr;
fw->dev.pp_regs = pp_addr;
fw->dev.dev = &pdev->dev;
pci_set_drvdata(pdev, fw);
err = prestera_fw_init(fw);
if (err)
goto err_prestera_fw_init;
dev_info(fw->dev.dev, "Prestera FW is ready\n");
fw->wq = alloc_workqueue("prestera_fw_wq", WQ_HIGHPRI | WQ_PERCPU, 1);
if (!fw->wq) {
err = -ENOMEM;
goto err_wq_alloc;
}
INIT_WORK(&fw->evt_work, prestera_fw_evt_work_fn);
err = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_MSI);
if (err < 0) {
dev_err(&pdev->dev, "MSI IRQ init failed\n");
goto err_irq_alloc;
}
err = request_irq(pci_irq_vector(pdev, 0), prestera_pci_irq_handler,
0, driver_name, fw);
if (err) {
dev_err(&pdev->dev, "fail to request IRQ\n");
goto err_request_irq;
}
err = prestera_device_register(&fw->dev);
if (err)
goto err_prestera_dev_register;
return 0;
err_prestera_dev_register:
free_irq(pci_irq_vector(pdev, 0), fw);
err_request_irq:
pci_free_irq_vectors(pdev);
err_irq_alloc:
destroy_workqueue(fw->wq);
err_wq_alloc:
prestera_fw_uninit(fw);
err_prestera_fw_init:
err_pci_dev_alloc:
err_pp_ioremap:
err_mem_ioremap:
err_dma_mask:
err_pci_request_regions:
err_pci_enable_device:
return err;
}
static void prestera_pci_remove(struct pci_dev *pdev)
{
struct prestera_fw *fw = pci_get_drvdata(pdev);
prestera_device_unregister(&fw->dev);
free_irq(pci_irq_vector(pdev, 0), fw);
pci_free_irq_vectors(pdev);
destroy_workqueue(fw->wq);
prestera_fw_uninit(fw);
}
static const struct pci_device_id prestera_pci_devices[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL, PRESTERA_DEV_ID_AC3X_98DX_55) },
{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL, PRESTERA_DEV_ID_AC3X_98DX_65) },
{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL, PRESTERA_DEV_ID_ALDRIN2) },
{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL, PRESTERA_DEV_ID_98DX7312M) },
{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL, PRESTERA_DEV_ID_98DX3500) },
{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL, PRESTERA_DEV_ID_98DX3501) },
{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL, PRESTERA_DEV_ID_98DX3510) },
{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL, PRESTERA_DEV_ID_98DX3520) },
{ }
};
MODULE_DEVICE_TABLE(pci, prestera_pci_devices);
static struct pci_driver prestera_pci_driver = {
.name = "Prestera DX",
.id_table = prestera_pci_devices,
.probe = prestera_pci_probe,
.remove = prestera_pci_remove,
};
module_pci_driver(prestera_pci_driver);
MODULE_LICENSE("Dual BSD/GPL");
MODULE_DESCRIPTION("Marvell Prestera switch PCI interface");
