xref: /openbmc/qemu/include/hw/net/cadence_gem.h (revision c09124dc)
1 /*
2  * QEMU Cadence GEM emulation
3  *
4  * Copyright (c) 2011 Xilinx, Inc.
5  *
6  * Permission is hereby granted, free of charge, to any person obtaining a copy
7  * of this software and associated documentation files (the "Software"), to deal
8  * in the Software without restriction, including without limitation the rights
9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10  * copies of the Software, and to permit persons to whom the Software is
11  * furnished to do so, subject to the following conditions:
12  *
13  * The above copyright notice and this permission notice shall be included in
14  * all copies or substantial portions of the Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22  * THE SOFTWARE.
23  */
24 
25 #ifndef CADENCE_GEM_H
26 #define CADENCE_GEM_H
27 #include "qom/object.h"
28 
29 #define TYPE_CADENCE_GEM "cadence_gem"
30 OBJECT_DECLARE_SIMPLE_TYPE(CadenceGEMState, CADENCE_GEM)
31 
32 #include "net/net.h"
33 #include "hw/sysbus.h"
34 
35 #define CADENCE_GEM_MAXREG        (0x00000800 / 4) /* Last valid GEM address */
36 
37 /* Max number of words in a DMA descriptor.  */
38 #define DESC_MAX_NUM_WORDS              6
39 
40 #define MAX_PRIORITY_QUEUES             8
41 #define MAX_TYPE1_SCREENERS             16
42 #define MAX_TYPE2_SCREENERS             16
43 
44 #define MAX_JUMBO_FRAME_SIZE_MASK 0x3FFF
45 #define MAX_FRAME_SIZE MAX_JUMBO_FRAME_SIZE_MASK
46 
47 struct CadenceGEMState {
48     /*< private >*/
49     SysBusDevice parent_obj;
50 
51     /*< public >*/
52     MemoryRegion iomem;
53     MemoryRegion *dma_mr;
54     AddressSpace dma_as;
55     NICState *nic;
56     NICConf conf;
57     qemu_irq irq[MAX_PRIORITY_QUEUES];
58 
59     /* Static properties */
60     uint8_t num_priority_queues;
61     uint8_t num_type1_screeners;
62     uint8_t num_type2_screeners;
63     uint32_t revision;
64     uint16_t jumbo_max_len;
65 
66     /* GEM registers backing store */
67     uint32_t regs[CADENCE_GEM_MAXREG];
68     /* Mask of register bits which are write only */
69     uint32_t regs_wo[CADENCE_GEM_MAXREG];
70     /* Mask of register bits which are read only */
71     uint32_t regs_ro[CADENCE_GEM_MAXREG];
72     /* Mask of register bits which are clear on read */
73     uint32_t regs_rtc[CADENCE_GEM_MAXREG];
74     /* Mask of register bits which are write 1 to clear */
75     uint32_t regs_w1c[CADENCE_GEM_MAXREG];
76 
77     /* PHY address */
78     uint8_t phy_addr;
79     /* PHY registers backing store */
80     uint16_t phy_regs[32];
81 
82     uint8_t phy_loop; /* Are we in phy loopback? */
83 
84     /* The current DMA descriptor pointers */
85     uint32_t rx_desc_addr[MAX_PRIORITY_QUEUES];
86     uint32_t tx_desc_addr[MAX_PRIORITY_QUEUES];
87 
88     uint8_t can_rx_state; /* Debug only */
89 
90     uint8_t tx_packet[MAX_FRAME_SIZE];
91     uint8_t rx_packet[MAX_FRAME_SIZE];
92     uint32_t rx_desc[MAX_PRIORITY_QUEUES][DESC_MAX_NUM_WORDS];
93 
94     bool sar_active[4];
95 };
96 
97 #endif
98