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https://github.com/AsahiLinux/u-boot
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5097ba6177
This patch prevent the Stratix 10 FPGA driver incorrectly return the transaction ID as the mailbox error code. It should always return the actual mailbox error code from SDM firmware. Signed-off-by: Ang, Chee Hong <chee.hong.ang@intel.com>
283 lines
6.7 KiB
C
283 lines
6.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2018 Intel Corporation <www.intel.com>
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*/
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#include <common.h>
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#include <altera.h>
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#include <asm/arch/mailbox_s10.h>
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#define RECONFIG_STATUS_POLL_RESP_TIMEOUT_MS 60000
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#define RECONFIG_STATUS_INTERVAL_DELAY_US 1000000
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static const struct mbox_cfgstat_state {
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int err_no;
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const char *error_name;
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} mbox_cfgstat_state[] = {
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{MBOX_CFGSTAT_STATE_IDLE, "FPGA in idle mode."},
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{MBOX_CFGSTAT_STATE_CONFIG, "FPGA in config mode."},
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{MBOX_CFGSTAT_STATE_FAILACK, "Acknowledgment failed!"},
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{MBOX_CFGSTAT_STATE_ERROR_INVALID, "Invalid bitstream!"},
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{MBOX_CFGSTAT_STATE_ERROR_CORRUPT, "Corrupted bitstream!"},
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{MBOX_CFGSTAT_STATE_ERROR_AUTH, "Authentication failed!"},
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{MBOX_CFGSTAT_STATE_ERROR_CORE_IO, "I/O error!"},
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{MBOX_CFGSTAT_STATE_ERROR_HARDWARE, "Hardware error!"},
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{MBOX_CFGSTAT_STATE_ERROR_FAKE, "Fake error!"},
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{MBOX_CFGSTAT_STATE_ERROR_BOOT_INFO, "Error in boot info!"},
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{MBOX_CFGSTAT_STATE_ERROR_QSPI_ERROR, "Error in QSPI!"},
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{MBOX_RESP_ERROR, "Mailbox general error!"},
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{-ETIMEDOUT, "I/O timeout error"},
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{-1, "Unknown error!"}
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};
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#define MBOX_CFGSTAT_MAX ARRAY_SIZE(mbox_cfgstat_state)
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static const char *mbox_cfgstat_to_str(int err)
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{
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int i;
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for (i = 0; i < MBOX_CFGSTAT_MAX - 1; i++) {
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if (mbox_cfgstat_state[i].err_no == err)
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return mbox_cfgstat_state[i].error_name;
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}
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return mbox_cfgstat_state[MBOX_CFGSTAT_MAX - 1].error_name;
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}
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/*
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* Add the ongoing transaction's command ID into pending list and return
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* the command ID for next transfer.
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*/
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static u8 add_transfer(u32 *xfer_pending_list, size_t list_size, u8 id)
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{
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int i;
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for (i = 0; i < list_size; i++) {
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if (xfer_pending_list[i])
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continue;
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xfer_pending_list[i] = id;
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debug("ID(%d) added to transaction pending list\n", id);
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/*
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* Increment command ID for next transaction.
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* Valid command ID (4 bits) is from 1 to 15.
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*/
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id = (id % 15) + 1;
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break;
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}
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return id;
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}
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/*
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* Check whether response ID match the command ID in the transfer
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* pending list. If a match is found in the transfer pending list,
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* it clears the transfer pending list and return the matched
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* command ID.
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*/
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static int get_and_clr_transfer(u32 *xfer_pending_list, size_t list_size,
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u8 id)
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{
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int i;
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for (i = 0; i < list_size; i++) {
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if (id != xfer_pending_list[i])
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continue;
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xfer_pending_list[i] = 0;
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return id;
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}
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return 0;
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}
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/*
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* Polling the FPGA configuration status.
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* Return 0 for success, non-zero for error.
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*/
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static int reconfig_status_polling_resp(void)
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{
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int ret;
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unsigned long start = get_timer(0);
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while (1) {
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ret = mbox_get_fpga_config_status(MBOX_RECONFIG_STATUS);
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if (!ret)
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return 0; /* configuration success */
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if (ret != MBOX_CFGSTAT_STATE_CONFIG)
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return ret;
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if (get_timer(start) > RECONFIG_STATUS_POLL_RESP_TIMEOUT_MS)
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break; /* time out */
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puts(".");
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udelay(RECONFIG_STATUS_INTERVAL_DELAY_US);
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}
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return -ETIMEDOUT;
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}
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static u32 get_resp_hdr(u32 *r_index, u32 *w_index, u32 *resp_count,
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u32 *resp_buf, u32 buf_size, u32 client_id)
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{
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u32 buf[MBOX_RESP_BUFFER_SIZE];
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u32 mbox_hdr;
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u32 resp_len;
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u32 hdr_len;
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u32 i;
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if (*resp_count < buf_size) {
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u32 rcv_len_max = buf_size - *resp_count;
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if (rcv_len_max > MBOX_RESP_BUFFER_SIZE)
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rcv_len_max = MBOX_RESP_BUFFER_SIZE;
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resp_len = mbox_rcv_resp(buf, rcv_len_max);
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for (i = 0; i < resp_len; i++) {
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resp_buf[(*w_index)++] = buf[i];
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*w_index %= buf_size;
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(*resp_count)++;
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}
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}
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/* No response in buffer */
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if (*resp_count == 0)
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return 0;
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mbox_hdr = resp_buf[*r_index];
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hdr_len = MBOX_RESP_LEN_GET(mbox_hdr);
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/* Insufficient header length to return a mailbox header */
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if ((*resp_count - 1) < hdr_len)
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return 0;
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*r_index += (hdr_len + 1);
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*r_index %= buf_size;
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*resp_count -= (hdr_len + 1);
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/* Make sure response belongs to us */
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if (MBOX_RESP_CLIENT_GET(mbox_hdr) != client_id)
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return 0;
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return mbox_hdr;
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}
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/* Send bit stream data to SDM via RECONFIG_DATA mailbox command */
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static int send_reconfig_data(const void *rbf_data, size_t rbf_size,
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u32 xfer_max, u32 buf_size_max)
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{
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u32 response_buffer[MBOX_RESP_BUFFER_SIZE];
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u32 xfer_pending[MBOX_RESP_BUFFER_SIZE];
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u32 resp_rindex = 0;
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u32 resp_windex = 0;
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u32 resp_count = 0;
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u32 xfer_count = 0;
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int resp_err = 0;
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u8 cmd_id = 1;
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u32 args[3];
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int ret;
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debug("SDM xfer_max = %d\n", xfer_max);
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debug("SDM buf_size_max = %x\n\n", buf_size_max);
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memset(xfer_pending, 0, sizeof(xfer_pending));
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while (rbf_size || xfer_count) {
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if (!resp_err && rbf_size && xfer_count < xfer_max) {
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args[0] = MBOX_ARG_DESC_COUNT(1);
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args[1] = (u64)rbf_data;
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if (rbf_size >= buf_size_max) {
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args[2] = buf_size_max;
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rbf_size -= buf_size_max;
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rbf_data += buf_size_max;
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} else {
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args[2] = (u64)rbf_size;
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rbf_size = 0;
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}
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resp_err = mbox_send_cmd_only(cmd_id, MBOX_RECONFIG_DATA,
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MBOX_CMD_INDIRECT, 3, args);
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if (!resp_err) {
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xfer_count++;
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cmd_id = add_transfer(xfer_pending,
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MBOX_RESP_BUFFER_SIZE,
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cmd_id);
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}
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puts(".");
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} else {
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u32 resp_hdr = get_resp_hdr(&resp_rindex, &resp_windex,
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&resp_count,
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response_buffer,
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MBOX_RESP_BUFFER_SIZE,
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MBOX_CLIENT_ID_UBOOT);
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/*
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* If no valid response header found or
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* non-zero length from RECONFIG_DATA
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*/
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if (!resp_hdr || MBOX_RESP_LEN_GET(resp_hdr))
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continue;
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/* Check for response's status */
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if (!resp_err) {
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resp_err = MBOX_RESP_ERR_GET(resp_hdr);
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debug("Response error code: %08x\n", resp_err);
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}
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ret = get_and_clr_transfer(xfer_pending,
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MBOX_RESP_BUFFER_SIZE,
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MBOX_RESP_ID_GET(resp_hdr));
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if (ret) {
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/* Claim and reuse the ID */
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cmd_id = (u8)ret;
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xfer_count--;
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}
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if (resp_err && !xfer_count)
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return resp_err;
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}
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}
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return 0;
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}
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/*
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* This is the interface used by FPGA driver.
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* Return 0 for success, non-zero for error.
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*/
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int stratix10_load(Altera_desc *desc, const void *rbf_data, size_t rbf_size)
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{
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int ret;
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u32 resp_len = 2;
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u32 resp_buf[2];
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debug("Sending MBOX_RECONFIG...\n");
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ret = mbox_send_cmd(MBOX_ID_UBOOT, MBOX_RECONFIG, MBOX_CMD_DIRECT, 0,
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NULL, 0, &resp_len, resp_buf);
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if (ret) {
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puts("Failure in RECONFIG mailbox command!\n");
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return ret;
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}
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ret = send_reconfig_data(rbf_data, rbf_size, resp_buf[0], resp_buf[1]);
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if (ret) {
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printf("RECONFIG_DATA error: %08x, %s\n", ret,
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mbox_cfgstat_to_str(ret));
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return ret;
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}
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/* Make sure we don't send MBOX_RECONFIG_STATUS too fast */
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udelay(RECONFIG_STATUS_INTERVAL_DELAY_US);
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debug("Polling with MBOX_RECONFIG_STATUS...\n");
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ret = reconfig_status_polling_resp();
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if (ret) {
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printf("RECONFIG_STATUS Error: %08x, %s\n", ret,
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mbox_cfgstat_to_str(ret));
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return ret;
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}
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puts("FPGA reconfiguration OK!\n");
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return ret;
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}
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