xref: /openbmc/qemu/include/hw/dma/xlnx_csu_dma.h (revision 2068cabd)
1 /*
2  * Xilinx Platform CSU Stream DMA emulation
3  *
4  * This implementation is based on
5  * https://github.com/Xilinx/qemu/blob/master/hw/dma/csu_stream_dma.c
6  *
7  * This program is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU General Public License as
9  * published by the Free Software Foundation; either version 2 or
10  * (at your option) version 3 of the License.
11  *
12  * This program is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15  * GNU General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License along
18  * with this program; if not, see <http://www.gnu.org/licenses/>.
19  */
20 
21 #ifndef XLNX_CSU_DMA_H
22 #define XLNX_CSU_DMA_H
23 
24 #define TYPE_XLNX_CSU_DMA "xlnx.csu_dma"
25 
26 #define XLNX_CSU_DMA_R_MAX (0x2c / 4)
27 
28 typedef struct XlnxCSUDMA {
29     SysBusDevice busdev;
30     MemoryRegion iomem;
31     MemTxAttrs attr;
32     MemoryRegion *dma_mr;
33     AddressSpace *dma_as;
34     qemu_irq irq;
35     StreamSink *tx_dev; /* Used as generic StreamSink */
36     ptimer_state *src_timer;
37 
38     uint16_t width;
39     bool is_dst;
40     bool r_size_last_word;
41 
42     StreamCanPushNotifyFn notify;
43     void *notify_opaque;
44 
45     uint32_t regs[XLNX_CSU_DMA_R_MAX];
46     RegisterInfo regs_info[XLNX_CSU_DMA_R_MAX];
47 } XlnxCSUDMA;
48 
49 #define XLNX_CSU_DMA(obj) \
50     OBJECT_CHECK(XlnxCSUDMA, (obj), TYPE_XLNX_CSU_DMA)
51 
52 #endif
53