[U-Boot] [PATCH v1 1/3] arm: socfpga: stratix10: Add Stratix10 FPGA Reconfiguration Driver

chee.hong.ang at intel.com
2018-04-20T03:26:44Z

From: Chee Hong Ang <chee.hong.ang@intel.com>

Enable FPGA reconfiguration support on Stratix10 SoC.

Signed-off-by: Chee Hong Ang <chee.hong.ang@intel.com>
---
drivers/fpga/Kconfig | 10 ++
drivers/fpga/Makefile | 1 +
drivers/fpga/stratix10.c | 298 +++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 309 insertions(+)
create mode 100644 drivers/fpga/stratix10.c

diff --git a/drivers/fpga/Kconfig b/drivers/fpga/Kconfig
index d36c4c5..255683d 100644
--- a/drivers/fpga/Kconfig
+++ b/drivers/fpga/Kconfig
@@ -31,6 +31,16 @@ config FPGA_CYCLON2
Enable FPGA driver for loading bitstream in BIT and BIN format
on Altera Cyclone II device.

+config FPGA_STRATIX10
+ bool "Enable Altera FPGA driver for Stratix 10"
+ depends on FPGA_ALTERA && TARGET_SOCFPGA_STRATIX10
+ help
+ Say Y here to enable the Altera Stratix 10 FPGA specific driver
+
+ This provides common functionality for Altera Stratix 10 devices.
+ Enable FPGA driver for writing bitstream into Altera Stratix10
+ device.
+
config FPGA_XILINX
bool "Enable Xilinx FPGA drivers"
select FPGA
diff --git a/drivers/fpga/Makefile b/drivers/fpga/Makefile
index 08c9ff8..3c906ec 100644
--- a/drivers/fpga/Makefile
+++ b/drivers/fpga/Makefile
@@ -19,6 +19,7 @@ obj-$(CONFIG_FPGA_ACEX1K) += ACEX1K.o
obj-$(CONFIG_FPGA_CYCLON2) += cyclon2.o
obj-$(CONFIG_FPGA_STRATIX_II) += stratixII.o
obj-$(CONFIG_FPGA_STRATIX_V) += stratixv.o
+obj-$(CONFIG_FPGA_STRATIX10) += stratix10.o
obj-$(CONFIG_FPGA_SOCFPGA) += socfpga.o
obj-$(CONFIG_TARGET_SOCFPGA_GEN5) += socfpga_gen5.o
obj-$(CONFIG_TARGET_SOCFPGA_ARRIA10) += socfpga_arria10.o
diff --git a/drivers/fpga/stratix10.c b/drivers/fpga/stratix10.c
new file mode 100644
index 0000000..f0c5ace
--- /dev/null
+++ b/drivers/fpga/stratix10.c
@@ -0,0 +1,298 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2016-2018 Intel Corporation <www.intel.com>
+ *
+ */
+
+#include <common.h>
+#include <altera.h>
+#include <asm/arch/mailbox_s10.h>
+
+#define RECONFIG_STATUS_POLL_RESP_TIMEOUT_MS 60000
+#define RECONFIG_STATUS_INTERVAL_DELAY_US 1000000
+
+static const struct mbox_cfgstat_state {
+ int err_no;
+ const char *error_name;
+} mbox_cfgstat_state[] = {
+ {MBOX_CFGSTAT_STATE_IDLE, "FPGA in idle mode."},
+ {MBOX_CFGSTAT_STATE_CONFIG, "FPGA in config mode."},
+ {MBOX_CFGSTAT_STATE_FAILACK, "Acknowledgement failed!"},
+ {MBOX_CFGSTAT_STATE_ERROR_INVALID, "Invalid bitstream!"},
+ {MBOX_CFGSTAT_STATE_ERROR_CORRUPT, "Corrupted bitstream!"},
+ {MBOX_CFGSTAT_STATE_ERROR_AUTH, "Authentication failed!"},
+ {MBOX_CFGSTAT_STATE_ERROR_CORE_IO, "I/O error!"},
+ {MBOX_CFGSTAT_STATE_ERROR_HARDWARE, "Hardware error!"},
+ {MBOX_CFGSTAT_STATE_ERROR_FAKE, "Fake error!"},
+ {MBOX_CFGSTAT_STATE_ERROR_BOOT_INFO, "Error in boot info!"},
+ {MBOX_CFGSTAT_STATE_ERROR_QSPI_ERROR, "Error in QSPI!"},
+ {-ETIMEDOUT, "I/O timeout error"},
+ {-1, "Unknown error!"}
+};
+
+#define MBOX_CFGSTAT_MAX \
+ (sizeof(mbox_cfgstat_state) / sizeof(struct mbox_cfgstat_state))
+
+static const char *mbox_cfgstat_to_str(int err)
+{
+ int i;
+
+ for (i = 0; i < MBOX_CFGSTAT_MAX - 1; i++) {
+ if (mbox_cfgstat_state[i].err_no == err)
+ return mbox_cfgstat_state[i].error_name;
+ }
+
+ return mbox_cfgstat_state[MBOX_CFGSTAT_MAX - 1].error_name;
+}
+
+static void inc_cmd_id(u8 *id)
+{
+ u8 val = *id + 1;
+
+ if (val > 15)
+ val = 1;
+
+ *id = val;
+}
+
+/*
+ * Polling the FPGA configuration status.
+ * Return 0 for success, non-zero for error.
+ */
+static int reconfig_status_polling_resp(void)
+{
+ u32 reconfig_status_resp_len;
+ u32 reconfig_status_resp[RECONFIG_STATUS_RESPONSE_LEN];
+ int ret;
+ unsigned long start = get_timer(0);
+
+ while (1) {
+ reconfig_status_resp_len = RECONFIG_STATUS_RESPONSE_LEN;
+ ret = mbox_send_cmd(MBOX_ID_UBOOT, MBOX_RECONFIG_STATUS,
+ MBOX_CMD_DIRECT, 0, NULL, 0,
+ &reconfig_status_resp_len,
+ reconfig_status_resp);
+
+ if (ret) {
+ puts("Failure in RECONFIG_STATUS mailbox command!\n");
+ return ret;
+ }
+
+ /* Check for any error */
+ ret = reconfig_status_resp[RECONFIG_STATUS_STATE];
+ if (ret && ret != MBOX_CFGSTAT_STATE_CONFIG)
+ return ret;
+
+ /* Make sure nStatus is not 0 */
+ ret = reconfig_status_resp[RECONFIG_STATUS_PIN_STATUS];
+ if (!(ret & RCF_PIN_STATUS_NSTATUS))
+ return MBOX_CFGSTAT_STATE_ERROR_HARDWARE;
+
+ ret = reconfig_status_resp[RECONFIG_STATUS_SOFTFUNC_STATUS];
+ if (ret & RCF_SOFTFUNC_STATUS_SEU_ERROR)
+ return MBOX_CFGSTAT_STATE_ERROR_HARDWARE;
+
+ if ((ret & RCF_SOFTFUNC_STATUS_CONF_DONE) &&
+ (ret & RCF_SOFTFUNC_STATUS_INIT_DONE) &&
+ !reconfig_status_resp[RECONFIG_STATUS_STATE])
+ return 0; /* configuration success */
+
+ if (get_timer(start) > RECONFIG_STATUS_POLL_RESP_TIMEOUT_MS)
+ break; /* time out */
+
+ puts(".");
+ udelay(RECONFIG_STATUS_INTERVAL_DELAY_US);
+ }
+
+ return -ETIMEDOUT;
+}
+
+static u32 get_resp_hdr(u32 *r_index, u32 *w_index, u32 *resp_count,
+ u32 *resp_buf, u32 buf_size, u32 client_id)
+{
+ u32 i;
+ u32 mbox_hdr;
+ u32 resp_len;
+ u32 hdr_len;
+ u32 buf[MBOX_RESP_BUFFER_SIZE];
+
+ if (*resp_count < buf_size) {
+ u32 rcv_len_max = buf_size - *resp_count;
+
+ if (rcv_len_max > MBOX_RESP_BUFFER_SIZE)
+ rcv_len_max = MBOX_RESP_BUFFER_SIZE;
+ resp_len = mbox_rcv_resp(buf, rcv_len_max);
+
+ for (i = 0; i < resp_len; i++) {
+ resp_buf[(*w_index)++] = buf[i];
+ *w_index %= buf_size;
+ (*resp_count)++;
+ }
+ }
+
+ /* No response in buffer */
+ if (*resp_count == 0)
+ return 0;
+
+ mbox_hdr = resp_buf[*r_index];
+
+ hdr_len = MBOX_RESP_LEN_GET(mbox_hdr);
+
+ /* Insufficient header length to return a mailbox header */
+ if ((*resp_count - 1) < hdr_len)
+ return 0;
+
+ *r_index += (hdr_len + 1);
+ *r_index %= buf_size;
+ *resp_count -= (hdr_len + 1);
+
+ /* Make sure response belongs to us */
+ if (MBOX_RESP_CLIENT_GET(mbox_hdr) != client_id)
+ return 0;
+
+ return mbox_hdr;
+}
+
+static int send_reconfig_data(const void *rbf_data, size_t rbf_size,
+ u32 xfer_max, u32 buf_size_max)
+{
+ u32 resp_rindex = 0;
+ u32 resp_windex = 0;
+ u32 resp_count = 0;
+ u32 response_buffer[MBOX_RESP_BUFFER_SIZE];
+ u8 resp_err = 0;
+ u8 cmd_id = 1;
+ u32 xfer_count = 0;
+ u32 xfer_pending[MBOX_RESP_BUFFER_SIZE];
+ u32 args[3];
+ int ret = 0;
+ u32 i;
+
+ debug("SDM xfer_max = %d\n", xfer_max);
+ debug("SDM buf_size_max = %x\n\n", buf_size_max);
+
+ for (i = 0; i < MBOX_RESP_BUFFER_SIZE; i++)
+ xfer_pending[i] = 0;
+
+ while (rbf_size || xfer_count) {
+ if (!resp_err && rbf_size && xfer_count < xfer_max) {
+ args[0] = (1 << 8);
+ args[1] = (u32)rbf_data;
+ if (rbf_size >= buf_size_max) {
+ args[2] = buf_size_max;
+ rbf_size -= buf_size_max;
+ rbf_data += buf_size_max;
+ } else {
+ args[2] = (u32)rbf_size;
+ rbf_size = 0;
+ }
+
+ debug("Sending MBOX_RECONFIG_DATA...\n");
+
+ ret = mbox_send_cmd_only(cmd_id, MBOX_RECONFIG_DATA,
+ MBOX_CMD_INDIRECT, 3, args);
+ if (ret) {
+ resp_err = 1;
+ } else {
+ xfer_count++;
+ for (i = 0; i < MBOX_RESP_BUFFER_SIZE; i++) {
+ if (!xfer_pending[i]) {
+ xfer_pending[i] = cmd_id;
+ inc_cmd_id(&cmd_id);
+ break;
+ }
+ }
+ debug("+xfer_count = %d\n", xfer_count);
+ debug("xfer ID = %d\n", xfer_pending[i]);
+ debug("data offset = %08x\n", args[1]);
+ debug("data size = %08x\n", args[2]);
+ }
+#ifndef DEBUG
+ puts(".");
+#endif
+ } else {
+ u32 r_id = 0;
+ u32 resp_hdr = get_resp_hdr(&resp_rindex, &resp_windex,
+ &resp_count,
+ response_buffer,
+ MBOX_RESP_BUFFER_SIZE,
+ MBOX_CLIENT_ID_UBOOT);
+
+ /* If no valid response header found */
+ if (!resp_hdr)
+ continue;
+
+ /* Expect 0 length from RECONFIG_DATA */
+ if (MBOX_RESP_LEN_GET(resp_hdr))
+ continue;
+
+ /* Check for response's status */
+ if (!resp_err) {
+ ret = MBOX_RESP_ERR_GET(resp_hdr);
+ debug("Response error code: %08x\n", ret);
+ /* Error in response */
+ if (ret)
+ resp_err = 1;
+ }
+
+ /* Read the response header's ID */
+ r_id = MBOX_RESP_ID_GET(resp_hdr);
+ for (i = 0; i < MBOX_RESP_BUFFER_SIZE; i++) {
+ if (r_id == xfer_pending[i]) {
+ /* Reclaim ID */
+ cmd_id = (u32)xfer_pending[i];
+ xfer_pending[i] = 0;
+ xfer_count--;
+ break;
+ }
+ }
+
+ debug("Reclaimed xfer ID = %d\n", cmd_id);
+ debug("-xfer_count = %d\n", xfer_count);
+ if (resp_err && !xfer_count)
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+/*
+ * This is the interface used by FPGA driver.
+ * Return 0 for success, non-zero for error.
+ */
+int stratix10_load(Altera_desc *desc, const void *rbf_data, size_t rbf_size)
+{
+ int ret;
+ u32 resp_len = 2;
+ u32 resp_buf[2];
+
+ debug("Sending MBOX_RECONFIG...\n");
+ ret = mbox_send_cmd(MBOX_ID_UBOOT, MBOX_RECONFIG, MBOX_CMD_DIRECT, 0,
+ NULL, 0, &resp_len, resp_buf);
+ if (ret) {
+ puts("Failure in RECONFIG mailbox command!\n");
+ return ret;
+ }
+
+ ret = send_reconfig_data(rbf_data, rbf_size, resp_buf[0], resp_buf[1]);
+ if (ret) {
+ printf("RECONFIG_DATA error: %08x, %s\n", ret,
+ mbox_cfgstat_to_str(ret));
+ return ret;
+ }
+
+ /* Make sure we don't send MBOX_RECONFIG_STATUS too fast */
+ udelay(RECONFIG_STATUS_INTERVAL_DELAY_US);
+
+ debug("\nPolling with MBOX_RECONFIG_STATUS...\n");
+ ret = reconfig_status_polling_resp();
+ if (ret) {
+ printf("Error: %s\n", mbox_cfgstat_to_str(ret));
+ return ret;
+ }
+
+ puts("\nFPGA reconfiguration OK!\n");
+
+ return ret;
+}
--
2.2.0