+static int stlink_usb_buf_rw_segment(void *handle, const struct dap_queue *q, unsigned int count)
+{
+ uint32_t bufsize = count * CMD_MEM_AP_2_SIZE(q[0].cmd);
+ uint8_t buf[bufsize];
+ uint8_t ap_num = q[0].mem_ap.ap->ap_num;
+ uint32_t addr = q[0].mem_ap.addr;
+ uint32_t csw = q[0].mem_ap.csw;
+
+ int retval = stlink_dap_open_ap(ap_num);
+ if (retval != ERROR_OK)
+ return retval;
+
+ switch (q[0].cmd) {
+ case CMD_MEM_AP_WRITE8:
+ for (unsigned int i = 0; i < count; i++)
+ buf[i] = q[i].mem_ap.data >> 8 * (q[i].mem_ap.addr & 3);
+ return stlink_usb_write_mem8(stlink_dap_handle, ap_num, csw, addr, bufsize, buf);
+
+ case CMD_MEM_AP_WRITE16:
+ for (unsigned int i = 0; i < count; i++)
+ h_u16_to_le(&buf[2 * i], q[i].mem_ap.data >> 8 * (q[i].mem_ap.addr & 2));
+ return stlink_usb_write_mem16(stlink_dap_handle, ap_num, csw, addr, bufsize, buf);
+
+ case CMD_MEM_AP_WRITE32:
+ for (unsigned int i = 0; i < count; i++)
+ h_u32_to_le(&buf[4 * i], q[i].mem_ap.data);
+ if (count > 1 && q[0].mem_ap.addr == q[1].mem_ap.addr)
+ return stlink_usb_write_mem32_noaddrinc(stlink_dap_handle, ap_num, csw, addr, bufsize, buf);
+ else
+ return stlink_usb_write_mem32(stlink_dap_handle, ap_num, csw, addr, bufsize, buf);
+
+ case CMD_MEM_AP_READ8:
+ retval = stlink_usb_read_mem8(stlink_dap_handle, ap_num, csw, addr, bufsize, buf);
+ if (retval == ERROR_OK)
+ for (unsigned int i = 0; i < count; i++)
+ *q[i].mem_ap.p_data = buf[i] << 8 * (q[i].mem_ap.addr & 3);
+ return retval;
+
+ case CMD_MEM_AP_READ16:
+ retval = stlink_usb_read_mem16(stlink_dap_handle, ap_num, csw, addr, bufsize, buf);
+ if (retval == ERROR_OK)
+ for (unsigned int i = 0; i < count; i++)
+ *q[i].mem_ap.p_data = le_to_h_u16(&buf[2 * i]) << 8 * (q[i].mem_ap.addr & 2);
+ return retval;
+
+ case CMD_MEM_AP_READ32:
+ if (count > 1 && q[0].mem_ap.addr == q[1].mem_ap.addr)
+ retval = stlink_usb_read_mem32_noaddrinc(stlink_dap_handle, ap_num, csw, addr, bufsize, buf);
+ else
+ retval = stlink_usb_read_mem32(stlink_dap_handle, ap_num, csw, addr, bufsize, buf);
+ if (retval == ERROR_OK)
+ for (unsigned int i = 0; i < count; i++)
+ *q[i].mem_ap.p_data = le_to_h_u32(&buf[4 * i]);
+ return retval;
+
+ default:
+ return ERROR_FAIL;
+ };
+}
+
+static int stlink_usb_count_buf_rw_queue(const struct dap_queue *q, unsigned int len)
+{
+ uint32_t incr = CMD_MEM_AP_2_SIZE(q[0].cmd);
+ unsigned int len_max;
+
+ if (incr == 1)
+ len_max = stlink_usb_block(stlink_dap_handle);
+ else
+ len_max = STLINK_MAX_RW16_32 / incr;
+
+ /* check for no address increment, 32 bits only */
+ if (len > 1 && incr == 4 && q[0].mem_ap.addr == q[1].mem_ap.addr)
+ incr = 0;
+
+ if (len > len_max)
+ len = len_max;
+
+ for (unsigned int i = 1; i < len; i++)
+ if (q[i].cmd != q[0].cmd ||
+ q[i].mem_ap.ap != q[0].mem_ap.ap ||
+ q[i].mem_ap.csw != q[0].mem_ap.csw ||
+ q[i].mem_ap.addr != q[i - 1].mem_ap.addr + incr)
+ return i;
+
+ return len;
+}
+
+static int stlink_usb_mem_rw_queue(void *handle, const struct dap_queue *q, unsigned int len, unsigned int *skip)
+{
+ unsigned int count = stlink_usb_count_buf_rw_queue(q, len);
+
+ int retval = stlink_usb_buf_rw_segment(handle, q, count);
+ if (retval != ERROR_OK)
+ return retval;
+
+ *skip = count;
+ return ERROR_OK;
+}
+
+static void stlink_dap_run_internal(struct adiv5_dap *dap)
+{
+ int retval = stlink_dap_check_reconnect(dap);
+ if (retval != ERROR_OK) {
+ stlink_dap_handle->queue_index = 0;
+ stlink_dap_record_error(retval);
+ return;
+ }
+
+ unsigned int i = stlink_dap_handle->queue_index;
+ struct dap_queue *q = &stlink_dap_handle->queue[0];
+
+ while (i && stlink_dap_get_error() == ERROR_OK) {
+ unsigned int skip = 1;
+
+ switch (q->cmd) {
+ case CMD_DP_READ:
+ retval = stlink_dap_dp_read(q->dp_r.dap, q->dp_r.reg, q->dp_r.p_data);
+ break;
+ case CMD_DP_WRITE:
+ retval = stlink_dap_dp_write(q->dp_w.dap, q->dp_w.reg, q->dp_w.data);
+ break;
+ case CMD_AP_READ:
+ retval = stlink_dap_ap_read(q->ap_r.ap, q->ap_r.reg, q->ap_r.p_data);
+ break;
+ case CMD_AP_WRITE:
+ /* ignore increment packed, not supported */
+ if (q->ap_w.reg == MEM_AP_REG_CSW)
+ q->ap_w.data &= ~CSW_ADDRINC_PACKED;
+ retval = stlink_dap_ap_write(q->ap_w.ap, q->ap_w.reg, q->ap_w.data);
+ break;
+
+ case CMD_MEM_AP_READ8:
+ case CMD_MEM_AP_READ16:
+ case CMD_MEM_AP_READ32:
+ case CMD_MEM_AP_WRITE8:
+ case CMD_MEM_AP_WRITE16:
+ case CMD_MEM_AP_WRITE32:
+ retval = stlink_usb_mem_rw_queue(stlink_dap_handle, q, i, &skip);
+ break;
+
+ default:
+ LOG_ERROR("ST-Link: Unknown queue command %d", q->cmd);
+ retval = ERROR_FAIL;
+ break;
+ }
+ stlink_dap_record_error(retval);
+ q += skip;
+ i -= skip;
+ }
+
+ stlink_dap_handle->queue_index = 0;
+}
+