1 /* 2 * Copyright (c) 2010 Broadcom Corporation 3 * 4 * Permission to use, copy, modify, and/or distribute this software for any 5 * purpose with or without fee is hereby granted, provided that the above 6 * copyright notice and this permission notice appear in all copies. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 11 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION 13 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN 14 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 15 */ 16 17 #ifndef BRCMFMAC_BUS_H 18 #define BRCMFMAC_BUS_H 19 20 #include "debug.h" 21 22 /* IDs of the 6 default common rings of msgbuf protocol */ 23 #define BRCMF_H2D_MSGRING_CONTROL_SUBMIT 0 24 #define BRCMF_H2D_MSGRING_RXPOST_SUBMIT 1 25 #define BRCMF_H2D_MSGRING_FLOWRING_IDSTART 2 26 #define BRCMF_D2H_MSGRING_CONTROL_COMPLETE 2 27 #define BRCMF_D2H_MSGRING_TX_COMPLETE 3 28 #define BRCMF_D2H_MSGRING_RX_COMPLETE 4 29 30 31 #define BRCMF_NROF_H2D_COMMON_MSGRINGS 2 32 #define BRCMF_NROF_D2H_COMMON_MSGRINGS 3 33 #define BRCMF_NROF_COMMON_MSGRINGS (BRCMF_NROF_H2D_COMMON_MSGRINGS + \ 34 BRCMF_NROF_D2H_COMMON_MSGRINGS) 35 36 /* The level of bus communication with the dongle */ 37 enum brcmf_bus_state { 38 BRCMF_BUS_DOWN, /* Not ready for frame transfers */ 39 BRCMF_BUS_UP /* Ready for frame transfers */ 40 }; 41 42 /* The level of bus communication with the dongle */ 43 enum brcmf_bus_protocol_type { 44 BRCMF_PROTO_BCDC, 45 BRCMF_PROTO_MSGBUF 46 }; 47 48 struct brcmf_mp_device; 49 50 struct brcmf_bus_dcmd { 51 char *name; 52 char *param; 53 int param_len; 54 struct list_head list; 55 }; 56 57 /** 58 * struct brcmf_bus_ops - bus callback operations. 59 * 60 * @preinit: execute bus/device specific dongle init commands (optional). 61 * @init: prepare for communication with dongle. 62 * @stop: clear pending frames, disable data flow. 63 * @txdata: send a data frame to the dongle. When the data 64 * has been transferred, the common driver must be 65 * notified using brcmf_txcomplete(). The common 66 * driver calls this function with interrupts 67 * disabled. 68 * @txctl: transmit a control request message to dongle. 69 * @rxctl: receive a control response message from dongle. 70 * @gettxq: obtain a reference of bus transmit queue (optional). 71 * @wowl_config: specify if dongle is configured for wowl when going to suspend 72 * @get_ramsize: obtain size of device memory. 73 * @get_memdump: obtain device memory dump in provided buffer. 74 * 75 * This structure provides an abstract interface towards the 76 * bus specific driver. For control messages to common driver 77 * will assure there is only one active transaction. Unless 78 * indicated otherwise these callbacks are mandatory. 79 */ 80 struct brcmf_bus_ops { 81 int (*preinit)(struct device *dev); 82 void (*stop)(struct device *dev); 83 int (*txdata)(struct device *dev, struct sk_buff *skb); 84 int (*txctl)(struct device *dev, unsigned char *msg, uint len); 85 int (*rxctl)(struct device *dev, unsigned char *msg, uint len); 86 struct pktq * (*gettxq)(struct device *dev); 87 void (*wowl_config)(struct device *dev, bool enabled); 88 size_t (*get_ramsize)(struct device *dev); 89 int (*get_memdump)(struct device *dev, void *data, size_t len); 90 }; 91 92 93 /** 94 * struct brcmf_bus_msgbuf - bus ringbuf if in case of msgbuf. 95 * 96 * @commonrings: commonrings which are always there. 97 * @flowrings: commonrings which are dynamically created and destroyed for data. 98 * @rx_dataoffset: if set then all rx data has this this offset. 99 * @max_rxbufpost: maximum number of buffers to post for rx. 100 * @max_flowrings: maximum number of tx flow rings supported. 101 * @max_submissionrings: maximum number of submission rings(h2d) supported. 102 * @max_completionrings: maximum number of completion rings(d2h) supported. 103 */ 104 struct brcmf_bus_msgbuf { 105 struct brcmf_commonring *commonrings[BRCMF_NROF_COMMON_MSGRINGS]; 106 struct brcmf_commonring **flowrings; 107 u32 rx_dataoffset; 108 u32 max_rxbufpost; 109 u16 max_flowrings; 110 u16 max_submissionrings; 111 u16 max_completionrings; 112 }; 113 114 115 /** 116 * struct brcmf_bus_stats - bus statistic counters. 117 * 118 * @pktcowed: packets cowed for extra headroom/unorphan. 119 * @pktcow_failed: packets dropped due to failed cow-ing. 120 */ 121 struct brcmf_bus_stats { 122 atomic_t pktcowed; 123 atomic_t pktcow_failed; 124 }; 125 126 /** 127 * struct brcmf_bus - interface structure between common and bus layer 128 * 129 * @bus_priv: pointer to private bus device. 130 * @proto_type: protocol type, bcdc or msgbuf 131 * @dev: device pointer of bus device. 132 * @drvr: public driver information. 133 * @state: operational state of the bus interface. 134 * @stats: statistics shared between common and bus layer. 135 * @maxctl: maximum size for rxctl request message. 136 * @chip: device identifier of the dongle chip. 137 * @always_use_fws_queue: bus wants use queue also when fwsignal is inactive. 138 * @wowl_supported: is wowl supported by bus driver. 139 * @chiprev: revision of the dongle chip. 140 */ 141 struct brcmf_bus { 142 union { 143 struct brcmf_sdio_dev *sdio; 144 struct brcmf_usbdev *usb; 145 struct brcmf_pciedev *pcie; 146 } bus_priv; 147 enum brcmf_bus_protocol_type proto_type; 148 struct device *dev; 149 struct brcmf_pub *drvr; 150 enum brcmf_bus_state state; 151 struct brcmf_bus_stats stats; 152 uint maxctl; 153 u32 chip; 154 u32 chiprev; 155 bool always_use_fws_queue; 156 bool wowl_supported; 157 158 const struct brcmf_bus_ops *ops; 159 struct brcmf_bus_msgbuf *msgbuf; 160 }; 161 162 /* 163 * callback wrappers 164 */ 165 static inline int brcmf_bus_preinit(struct brcmf_bus *bus) 166 { 167 if (!bus->ops->preinit) 168 return 0; 169 return bus->ops->preinit(bus->dev); 170 } 171 172 static inline void brcmf_bus_stop(struct brcmf_bus *bus) 173 { 174 bus->ops->stop(bus->dev); 175 } 176 177 static inline int brcmf_bus_txdata(struct brcmf_bus *bus, struct sk_buff *skb) 178 { 179 return bus->ops->txdata(bus->dev, skb); 180 } 181 182 static inline 183 int brcmf_bus_txctl(struct brcmf_bus *bus, unsigned char *msg, uint len) 184 { 185 return bus->ops->txctl(bus->dev, msg, len); 186 } 187 188 static inline 189 int brcmf_bus_rxctl(struct brcmf_bus *bus, unsigned char *msg, uint len) 190 { 191 return bus->ops->rxctl(bus->dev, msg, len); 192 } 193 194 static inline 195 struct pktq *brcmf_bus_gettxq(struct brcmf_bus *bus) 196 { 197 if (!bus->ops->gettxq) 198 return ERR_PTR(-ENOENT); 199 200 return bus->ops->gettxq(bus->dev); 201 } 202 203 static inline 204 void brcmf_bus_wowl_config(struct brcmf_bus *bus, bool enabled) 205 { 206 if (bus->ops->wowl_config) 207 bus->ops->wowl_config(bus->dev, enabled); 208 } 209 210 static inline size_t brcmf_bus_get_ramsize(struct brcmf_bus *bus) 211 { 212 if (!bus->ops->get_ramsize) 213 return 0; 214 215 return bus->ops->get_ramsize(bus->dev); 216 } 217 218 static inline 219 int brcmf_bus_get_memdump(struct brcmf_bus *bus, void *data, size_t len) 220 { 221 if (!bus->ops->get_memdump) 222 return -EOPNOTSUPP; 223 224 return bus->ops->get_memdump(bus->dev, data, len); 225 } 226 227 /* 228 * interface functions from common layer 229 */ 230 231 /* Receive frame for delivery to OS. Callee disposes of rxp. */ 232 void brcmf_rx_frame(struct device *dev, struct sk_buff *rxp, bool handle_event); 233 /* Receive async event packet from firmware. Callee disposes of rxp. */ 234 void brcmf_rx_event(struct device *dev, struct sk_buff *rxp); 235 236 /* Indication from bus module regarding presence/insertion of dongle. */ 237 int brcmf_attach(struct device *dev, struct brcmf_mp_device *settings); 238 /* Indication from bus module regarding removal/absence of dongle */ 239 void brcmf_detach(struct device *dev); 240 /* Indication from bus module that dongle should be reset */ 241 void brcmf_dev_reset(struct device *dev); 242 243 /* Configure the "global" bus state used by upper layers */ 244 void brcmf_bus_change_state(struct brcmf_bus *bus, enum brcmf_bus_state state); 245 246 int brcmf_bus_started(struct device *dev); 247 s32 brcmf_iovar_data_set(struct device *dev, char *name, void *data, u32 len); 248 void brcmf_bus_add_txhdrlen(struct device *dev, uint len); 249 250 #ifdef CONFIG_BRCMFMAC_SDIO 251 void brcmf_sdio_exit(void); 252 void brcmf_sdio_register(void); 253 #endif 254 #ifdef CONFIG_BRCMFMAC_USB 255 void brcmf_usb_exit(void); 256 void brcmf_usb_register(void); 257 #endif 258 259 #endif /* BRCMFMAC_BUS_H */ 260