From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- .../net/ethernet/marvell/prestera/prestera_pci.c | 890 +++++++++++++++++++++ 1 file changed, 890 insertions(+) create mode 100644 drivers/net/ethernet/marvell/prestera/prestera_pci.c (limited to 'drivers/net/ethernet/marvell/prestera/prestera_pci.c') diff --git a/drivers/net/ethernet/marvell/prestera/prestera_pci.c b/drivers/net/ethernet/marvell/prestera/prestera_pci.c new file mode 100644 index 000000000..a37dbbda8 --- /dev/null +++ b/drivers/net/ethernet/marvell/prestera/prestera_pci.c @@ -0,0 +1,890 @@ +// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 +/* Copyright (c) 2019-2020 Marvell International Ltd. All rights reserved */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include "prestera.h" + +#define PRESTERA_MSG_MAX_SIZE 1500 + +#define PRESTERA_SUPP_FW_MAJ_VER 4 +#define PRESTERA_SUPP_FW_MIN_VER 0 + +#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_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)) + +/* fw loader registers */ +#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 + +/* fw registers */ +#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) + +/* PRESTERA_CMD_REQ_CTL_REG flags */ +#define PRESTERA_CMD_F_REQ_SENT BIT(0) +#define PRESTERA_CMD_F_REPL_RCVD BIT(1) + +/* PRESTERA_CMD_RCV_CTL_REG flags */ +#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 + +struct prestera_fw_evtq { + u8 __iomem *addr; + size_t len; +}; + +struct prestera_fw_cmdq { + /* serialize access to dev->send_req */ + 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; + 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; + + /* wait for finish previous reply from FW */ + 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); + + /* wait for reply from FW */ + 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 u32 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 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, + 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 int prestera_pci_probe(struct pci_dev *pdev, + const struct pci_device_id *id) +{ + const char *driver_name = dev_driver_string(&pdev->dev); + struct prestera_fw *fw; + int err; + + err = pcim_enable_device(pdev); + if (err) + return err; + + err = pcim_iomap_regions(pdev, BIT(PRESTERA_PCI_BAR_FW) | + BIT(PRESTERA_PCI_BAR_PP), + pci_name(pdev)); + if (err) + return err; + + 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; + } + + pci_set_master(pdev); + + fw = devm_kzalloc(&pdev->dev, sizeof(*fw), GFP_KERNEL); + if (!fw) { + err = -ENOMEM; + goto err_pci_dev_alloc; + } + + fw->dev.ctl_regs = pcim_iomap_table(pdev)[PRESTERA_PCI_BAR_FW]; + fw->dev.pp_regs = pcim_iomap_table(pdev)[PRESTERA_PCI_BAR_PP]; + 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, 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_dma_mask: + 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, 0xC804) }, + { PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0xC80C) }, + { PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0xCC1E) }, + { } +}; +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"); -- cgit v1.2.3