From: Chee Hong Ang <chee.hong....@intel.com>
In non-secure mode (EL2), FPGA reconfiguration driver calls the
SMC/PSCI services provided by ATF to configure the FPGA.
Signed-off-by: Chee Hong Ang <chee.hong....@intel.com>
---
drivers/fpga/intel_sdm_mb.c | 139 ++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 139 insertions(+)
diff --git a/drivers/fpga/intel_sdm_mb.c b/drivers/fpga/intel_sdm_mb.c
index 9a1dc2c0c8..f5fd9a14c2 100644
--- a/drivers/fpga/intel_sdm_mb.c
+++ b/drivers/fpga/intel_sdm_mb.c
@@ -8,11 +8,149 @@
#include <log.h>
#include <watchdog.h>
#include <asm/arch/mailbox_s10.h>
+#include <asm/arch/smc_api.h>
#include <linux/delay.h>
+#include <linux/intel-smc.h>
#define RECONFIG_STATUS_POLL_RESP_TIMEOUT_MS 60000
#define RECONFIG_STATUS_INTERVAL_DELAY_US 1000000
+#if !defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_ATF)
+
+#define BITSTREAM_CHUNK_SIZE 0xFFFF0
+#define RECONFIG_STATUS_POLL_RETRY_MAX 100
+
+/*
+ * Polling the FPGA configuration status.
+ * Return 0 for success, non-zero for error.
+ */
+static int reconfig_status_polling_resp(void)
+{
+ int ret;
+ unsigned long start = get_timer(0);
+
+ while (1) {
+ ret = invoke_smc(INTEL_SIP_SMC_FPGA_CONFIG_ISDONE, NULL, 0,
+ NULL, 0);
+
+ if (!ret)
+ return 0; /* configuration success */
+
+ if (ret != INTEL_SIP_SMC_STATUS_BUSY)
+ return ret;
+
+ if (get_timer(start) > RECONFIG_STATUS_POLL_RESP_TIMEOUT_MS)
+ return -ETIMEDOUT; /* time out */
+
+ puts(".");
+ udelay(RECONFIG_STATUS_INTERVAL_DELAY_US);
+ WATCHDOG_RESET();
+ }
+
+ return -ETIMEDOUT;
+}
+
+static int send_bitstream(const void *rbf_data, size_t rbf_size)
+{
+ int i;
+ u64 res_buf[3];
+ u64 args[2];
+ u32 xfer_count = 0;
+ int ret, wr_ret = 0, retry = 0;
+ size_t buf_size = (rbf_size > BITSTREAM_CHUNK_SIZE) ?
+ BITSTREAM_CHUNK_SIZE : rbf_size;
+
+ while (rbf_size || xfer_count) {
+ if (!wr_ret && rbf_size) {
+ args[0] = (u64)rbf_data;
+ args[1] = buf_size;
+ wr_ret = invoke_smc(INTEL_SIP_SMC_FPGA_CONFIG_WRITE,
+ args, 2, NULL, 0);
+
+ debug("wr_ret = %d, rbf_data = %p, buf_size = %08lx\n",
+ wr_ret, rbf_data, buf_size);
+
+ if (wr_ret)
+ continue;
+
+ rbf_size -= buf_size;
+ rbf_data += buf_size;
+
+ if (buf_size >= rbf_size)
+ buf_size = rbf_size;
+
+ xfer_count++;
+ puts(".");
+ } else {
+ ret = invoke_smc(
+ INTEL_SIP_SMC_FPGA_CONFIG_COMPLETED_WRITE,
+ NULL, 0, res_buf, ARRAY_SIZE(res_buf));
+ if (!ret) {
+ for (i = 0; i < ARRAY_SIZE(res_buf); i++) {
+ if (!res_buf[i])
+ break;
+ xfer_count--;
+ wr_ret = 0;
+ retry = 0;
+ }
+ } else if (ret !=
+ INTEL_SIP_SMC_STATUS_BUSY)
+ return ret;
+ else if (!xfer_count)
+ return INTEL_SIP_SMC_STATUS_ERROR;
+
+ if (++retry >= RECONFIG_STATUS_POLL_RETRY_MAX)
+ return -ETIMEDOUT;
+
+ udelay(20000);
+ }
+ WATCHDOG_RESET();
+ }
+
+ return 0;
+}
+
+/*
+ * This is the interface used by FPGA driver.
+ * Return 0 for success, non-zero for error.
+ */
+int intel_sdm_mb_load(Altera_desc *desc, const void *rbf_data, size_t rbf_size)
+{
+ int ret;
+ u64 arg = 1;
+
+ debug("Invoking FPGA_CONFIG_START...\n");
+
+ ret = invoke_smc(INTEL_SIP_SMC_FPGA_CONFIG_START, &arg, 1, NULL, 0);
+
+ if (ret) {
+ puts("Failure in RECONFIG mailbox command!\n");
+ return ret;
+ }
+
+ ret = send_bitstream(rbf_data, rbf_size);
+ if (ret) {
+ puts("Error sending bitstream!\n");
+ return ret;
+ }
+
+ /* Make sure we don't send MBOX_RECONFIG_STATUS too fast */
+ udelay(RECONFIG_STATUS_INTERVAL_DELAY_US);
+
+ debug("Polling with MBOX_RECONFIG_STATUS...\n");
+ ret = reconfig_status_polling_resp();
+ if (ret) {
+ puts("FPGA reconfiguration failed!");
+ return ret;
+ }
+
+ puts("FPGA reconfiguration OK!\n");
+
+ return ret;
+}
+
+#else
+
static const struct mbox_cfgstat_state {
int err_no;
const char *error_name;
@@ -286,3 +424,4 @@ int intel_sdm_mb_load(Altera_desc *desc, const void
*rbf_data, size_t rbf_size)
return ret;
}
+#endif
--
2.13.0
