/* * Xilinx Platform CSU Stream DMA emulation * * This implementation is based on * https://github.com/Xilinx/qemu/blob/master/hw/dma/csu_stream_dma.c * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 or * (at your option) version 3 of the License. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, see <http://www.gnu.org/licenses/>. */ #ifndef XLNX_CSU_DMA_H #define XLNX_CSU_DMA_H #include "hw/sysbus.h" #include "hw/register.h" #include "hw/ptimer.h" #include "hw/stream.h" #define TYPE_XLNX_CSU_DMA "xlnx.csu_dma" #define XLNX_CSU_DMA_R_MAX (0x2c / 4) typedef struct XlnxCSUDMA { SysBusDevice busdev; MemoryRegion iomem; MemTxAttrs attr; MemoryRegion *dma_mr; AddressSpace dma_as; qemu_irq irq; StreamSink *tx_dev; /* Used as generic StreamSink */ ptimer_state *src_timer; uint16_t width; bool is_dst; bool r_size_last_word; StreamCanPushNotifyFn notify; void *notify_opaque; uint32_t regs[XLNX_CSU_DMA_R_MAX]; RegisterInfo regs_info[XLNX_CSU_DMA_R_MAX]; } XlnxCSUDMA; OBJECT_DECLARE_TYPE(XlnxCSUDMA, XlnxCSUDMAClass, XLNX_CSU_DMA) struct XlnxCSUDMAClass { SysBusDeviceClass parent_class; /* * read: Start a read transfer on a Xilinx CSU DMA engine * * @s: the Xilinx CSU DMA engine to start the transfer on * @addr: the address to read * @len: the number of bytes to read at 'addr' * * @return a MemTxResult indicating whether the operation succeeded ('len' * bytes were read) or failed. */ MemTxResult (*read)(XlnxCSUDMA *s, hwaddr addr, uint32_t len); }; #endif