include/hw/net/cadence_gem.h

   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
  28 #define TYPE_CADENCE_GEM "cadence_gem"
  29 #define CADENCE_GEM(obj) OBJECT_CHECK(CadenceGEMState, (obj), TYPE_CADENCE_GEM)
  30
  31 #include "net/net.h"
  32 #include "hw/sysbus.h"
  33
  34 #define CADENCE_GEM_MAXREG        (0x00000800 / 4) /* Last valid GEM address */
  35
  36 /* Max number of words in a DMA descriptor.  */
  37 #define DESC_MAX_NUM_WORDS              6
  38
  39 #define MAX_PRIORITY_QUEUES             8
  40 #define MAX_TYPE1_SCREENERS             16
  41 #define MAX_TYPE2_SCREENERS             16
  42
  43 #define MAX_FRAME_SIZE 2048
  44
  45 typedef struct CadenceGEMState {
  46     /*< private >*/
  47     SysBusDevice parent_obj;
  48
  49     /*< public >*/
  50     MemoryRegion iomem;
  51     MemoryRegion *dma_mr;
  52     AddressSpace dma_as;
  53     NICState *nic;
  54     NICConf conf;
  55     qemu_irq irq[MAX_PRIORITY_QUEUES];
  56
  57     /* Static properties */
  58     uint8_t num_priority_queues;
  59     uint8_t num_type1_screeners;
  60     uint8_t num_type2_screeners;
  61     uint32_t revision;
  62
  63     /* GEM registers backing store */
  64     uint32_t regs[CADENCE_GEM_MAXREG];
  65     /* Mask of register bits which are write only */
  66     uint32_t regs_wo[CADENCE_GEM_MAXREG];
  67     /* Mask of register bits which are read only */
  68     uint32_t regs_ro[CADENCE_GEM_MAXREG];
  69     /* Mask of register bits which are clear on read */
  70     uint32_t regs_rtc[CADENCE_GEM_MAXREG];
  71     /* Mask of register bits which are write 1 to clear */
  72     uint32_t regs_w1c[CADENCE_GEM_MAXREG];
  73
  74     /* PHY registers backing store */
  75     uint16_t phy_regs[32];
  76
  77     uint8_t phy_loop; /* Are we in phy loopback? */
  78
  79     /* The current DMA descriptor pointers */
  80     uint32_t rx_desc_addr[MAX_PRIORITY_QUEUES];
  81     uint32_t tx_desc_addr[MAX_PRIORITY_QUEUES];
  82
  83     uint8_t can_rx_state; /* Debug only */
  84
  85     uint8_t tx_packet[MAX_FRAME_SIZE];
  86     uint8_t rx_packet[MAX_FRAME_SIZE];
  87     uint32_t rx_desc[MAX_PRIORITY_QUEUES][DESC_MAX_NUM_WORDS];
  88
  89     bool sar_active[4];
  90 } CadenceGEMState;
  91
  92 #endif