jtag/drivers/cmsis_dap: move pending request FIFO
Move all pending request FIFO related variables to the struct cmsis_dap Pure refactoring, no functional changes. Signed-off-by: Tomas Vanek <vanekt@fbl.cz> Change-Id: I2cea9c1e265ac102ec0f314767b8b9afdcda9ee9 Reviewed-on: https://review.openocd.org/c/openocd/+/7360 Tested-by: jenkins Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>
This commit is contained in:
Tomas Vanek
Antonio Borneo
parent
9dac3b247b
commit
128736d23f
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@ -209,17 +209,6 @@ static const char * const info_caps_str[INFO_CAPS__NUM_CAPS] = {
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"UART via USB COM port supported",
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};
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struct pending_transfer_result {
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uint8_t cmd;
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uint32_t data;
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void *buffer;
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};
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struct pending_request_block {
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struct pending_transfer_result *transfers;
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int transfer_count;
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};
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struct pending_scan_result {
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/** Offset in bytes in the CMD_DAP_JTAG_SEQ response buffer. */
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unsigned first;
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@ -231,16 +220,8 @@ struct pending_scan_result {
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unsigned buffer_offset;
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};
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/* Up to MIN(packet_count, MAX_PENDING_REQUESTS) requests may be issued
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* until the first response arrives */
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#define MAX_PENDING_REQUESTS 3
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/* Pending requests are organized as a FIFO - circular buffer */
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/* Each block in FIFO can contain up to pending_queue_len transfers */
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static int pending_queue_len;
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static struct pending_request_block pending_fifo[MAX_PENDING_REQUESTS];
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static int pending_fifo_put_idx, pending_fifo_get_idx;
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static int pending_fifo_block_count;
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/* pointers to buffers that will receive jtag scan results on the next flush */
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#define MAX_PENDING_SCAN_RESULTS 256
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@ -314,8 +295,8 @@ static void cmsis_dap_close(struct cmsis_dap *dap)
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cmsis_dap_handle = NULL;
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for (int i = 0; i < MAX_PENDING_REQUESTS; i++) {
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free(pending_fifo[i].transfers);
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pending_fifo[i].transfers = NULL;
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free(dap->pending_fifo[i].transfers);
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dap->pending_fifo[i].transfers = NULL;
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}
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}
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@ -337,14 +318,14 @@ static void cmsis_dap_flush_read(struct cmsis_dap *dap)
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/* Send a message and receive the reply */
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static int cmsis_dap_xfer(struct cmsis_dap *dap, int txlen)
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{
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if (pending_fifo_block_count) {
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LOG_ERROR("pending %d blocks, flushing", pending_fifo_block_count);
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while (pending_fifo_block_count) {
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if (dap->pending_fifo_block_count) {
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LOG_ERROR("pending %u blocks, flushing", dap->pending_fifo_block_count);
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while (dap->pending_fifo_block_count) {
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dap->backend->read(dap, 10);
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pending_fifo_block_count--;
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dap->pending_fifo_block_count--;
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}
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pending_fifo_put_idx = 0;
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pending_fifo_get_idx = 0;
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dap->pending_fifo_put_idx = 0;
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dap->pending_fifo_get_idx = 0;
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}
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uint8_t current_cmd = cmsis_dap_handle->command[0];
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@ -763,9 +744,10 @@ static int cmsis_dap_cmd_dap_swo_data(
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static void cmsis_dap_swd_write_from_queue(struct cmsis_dap *dap)
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{
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uint8_t *command = cmsis_dap_handle->command;
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struct pending_request_block *block = &pending_fifo[pending_fifo_put_idx];
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struct pending_request_block *block = &dap->pending_fifo[dap->pending_fifo_put_idx];
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LOG_DEBUG_IO("Executing %d queued transactions from FIFO index %d", block->transfer_count, pending_fifo_put_idx);
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LOG_DEBUG_IO("Executing %d queued transactions from FIFO index %u",
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block->transfer_count, dap->pending_fifo_put_idx);
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if (queued_retval != ERROR_OK) {
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LOG_DEBUG("Skipping due to previous errors: %d", queued_retval);
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@ -824,10 +806,10 @@ static void cmsis_dap_swd_write_from_queue(struct cmsis_dap *dap)
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queued_retval = ERROR_OK;
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}
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pending_fifo_put_idx = (pending_fifo_put_idx + 1) % dap->packet_count;
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pending_fifo_block_count++;
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if (pending_fifo_block_count > dap->packet_count)
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LOG_ERROR("too much pending writes %d", pending_fifo_block_count);
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dap->pending_fifo_put_idx = (dap->pending_fifo_put_idx + 1) % dap->packet_count;
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dap->pending_fifo_block_count++;
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if (dap->pending_fifo_block_count > dap->packet_count)
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LOG_ERROR("too much pending writes %u", dap->pending_fifo_block_count);
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return;
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@ -837,9 +819,9 @@ skip:
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static void cmsis_dap_swd_read_process(struct cmsis_dap *dap, int timeout_ms)
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{
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struct pending_request_block *block = &pending_fifo[pending_fifo_get_idx];
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struct pending_request_block *block = &dap->pending_fifo[dap->pending_fifo_get_idx];
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if (pending_fifo_block_count == 0)
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if (dap->pending_fifo_block_count == 0)
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LOG_ERROR("no pending write");
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/* get reply */
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@ -880,8 +862,8 @@ static void cmsis_dap_swd_read_process(struct cmsis_dap *dap, int timeout_ms)
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LOG_ERROR("CMSIS-DAP transfer count mismatch: expected %d, got %d",
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block->transfer_count, transfer_count);
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LOG_DEBUG_IO("Received results of %d queued transactions FIFO index %d",
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transfer_count, pending_fifo_get_idx);
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LOG_DEBUG_IO("Received results of %d queued transactions FIFO index %u timeout %i",
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transfer_count, dap->pending_fifo_get_idx, timeout_ms);
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size_t idx = 3;
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for (int i = 0; i < transfer_count; i++) {
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struct pending_transfer_result *transfer = &(block->transfers[i]);
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@ -907,22 +889,22 @@ static void cmsis_dap_swd_read_process(struct cmsis_dap *dap, int timeout_ms)
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skip:
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block->transfer_count = 0;
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pending_fifo_get_idx = (pending_fifo_get_idx + 1) % dap->packet_count;
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pending_fifo_block_count--;
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dap->pending_fifo_get_idx = (dap->pending_fifo_get_idx + 1) % dap->packet_count;
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dap->pending_fifo_block_count--;
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}
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static int cmsis_dap_swd_run_queue(void)
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{
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if (pending_fifo_block_count)
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if (cmsis_dap_handle->pending_fifo_block_count)
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cmsis_dap_swd_read_process(cmsis_dap_handle, 0);
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cmsis_dap_swd_write_from_queue(cmsis_dap_handle);
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while (pending_fifo_block_count)
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while (cmsis_dap_handle->pending_fifo_block_count)
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cmsis_dap_swd_read_process(cmsis_dap_handle, LIBUSB_TIMEOUT_MS);
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pending_fifo_put_idx = 0;
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pending_fifo_get_idx = 0;
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cmsis_dap_handle->pending_fifo_put_idx = 0;
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cmsis_dap_handle->pending_fifo_get_idx = 0;
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int retval = queued_retval;
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queued_retval = ERROR_OK;
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@ -934,15 +916,15 @@ static void cmsis_dap_swd_queue_cmd(uint8_t cmd, uint32_t *dst, uint32_t data)
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{
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bool targetsel_cmd = swd_cmd(false, false, DP_TARGETSEL) == cmd;
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if (pending_fifo[pending_fifo_put_idx].transfer_count == pending_queue_len
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|| targetsel_cmd) {
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if (pending_fifo_block_count)
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if (cmsis_dap_handle->pending_fifo[cmsis_dap_handle->pending_fifo_put_idx].transfer_count == pending_queue_len
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|| targetsel_cmd) {
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if (cmsis_dap_handle->pending_fifo_block_count)
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cmsis_dap_swd_read_process(cmsis_dap_handle, 0);
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/* Not enough room in the queue. Run the queue. */
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cmsis_dap_swd_write_from_queue(cmsis_dap_handle);
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if (pending_fifo_block_count >= cmsis_dap_handle->packet_count)
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if (cmsis_dap_handle->pending_fifo_block_count >= cmsis_dap_handle->packet_count)
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cmsis_dap_swd_read_process(cmsis_dap_handle, LIBUSB_TIMEOUT_MS);
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}
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@ -954,7 +936,7 @@ static void cmsis_dap_swd_queue_cmd(uint8_t cmd, uint32_t *dst, uint32_t data)
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return;
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}
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struct pending_request_block *block = &pending_fifo[pending_fifo_put_idx];
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struct pending_request_block *block = &cmsis_dap_handle->pending_fifo[cmsis_dap_handle->pending_fifo_put_idx];
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struct pending_transfer_result *transfer = &(block->transfers[block->transfer_count]);
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transfer->data = data;
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transfer->cmd = cmd;
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@ -1231,17 +1213,18 @@ static int cmsis_dap_init(void)
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goto init_err;
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if (data[0] == 1) { /* byte */
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int pkt_cnt = data[1];
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unsigned int pkt_cnt = data[1];
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if (pkt_cnt > 1)
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cmsis_dap_handle->packet_count = MIN(MAX_PENDING_REQUESTS, pkt_cnt);
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LOG_DEBUG("CMSIS-DAP: Packet Count = %d", pkt_cnt);
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LOG_DEBUG("CMSIS-DAP: Packet Count = %u", pkt_cnt);
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}
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LOG_DEBUG("Allocating FIFO for %d pending packets", cmsis_dap_handle->packet_count);
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for (int i = 0; i < cmsis_dap_handle->packet_count; i++) {
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pending_fifo[i].transfers = malloc(pending_queue_len * sizeof(struct pending_transfer_result));
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if (!pending_fifo[i].transfers) {
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LOG_DEBUG("Allocating FIFO for %u pending packets", cmsis_dap_handle->packet_count);
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for (unsigned int i = 0; i < cmsis_dap_handle->packet_count; i++) {
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cmsis_dap_handle->pending_fifo[i].transfers = malloc(pending_queue_len
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* sizeof(struct pending_transfer_result));
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if (!cmsis_dap_handle->pending_fifo[i].transfers) {
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LOG_ERROR("Unable to allocate memory for CMSIS-DAP queue");
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retval = ERROR_FAIL;
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goto init_err;
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@ -7,17 +7,37 @@
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struct cmsis_dap_backend;
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struct cmsis_dap_backend_data;
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struct command_registration;
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struct pending_transfer_result {
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uint8_t cmd;
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uint32_t data;
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void *buffer;
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};
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/* Up to MIN(packet_count, MAX_PENDING_REQUESTS) requests may be issued
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* until the first response arrives */
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#define MAX_PENDING_REQUESTS 4
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struct pending_request_block {
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struct pending_transfer_result *transfers;
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int transfer_count;
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};
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struct cmsis_dap {
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struct cmsis_dap_backend_data *bdata;
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const struct cmsis_dap_backend *backend;
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uint16_t packet_size;
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int packet_count;
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uint8_t *packet_buffer;
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uint16_t packet_buffer_size;
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uint8_t *command;
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uint8_t *response;
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/* Pending requests are organized as a FIFO - circular buffer */
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struct pending_request_block pending_fifo[MAX_PENDING_REQUESTS];
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unsigned int packet_count;
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unsigned int pending_fifo_put_idx, pending_fifo_get_idx;
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unsigned int pending_fifo_block_count;
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uint16_t caps;
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uint8_t mode;
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uint32_t swo_buf_sz;
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