root/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bus.h

INCLUDED FROM

DEFINITIONS

1. brcmf_bus_preinit
2. brcmf_bus_stop
3. brcmf_bus_txdata
4. brcmf_bus_txctl
5. brcmf_bus_rxctl
6. brcmf_bus_gettxq
7. brcmf_bus_wowl_config
8. brcmf_bus_get_ramsize
9. brcmf_bus_get_memdump
10. brcmf_bus_get_fwname
11. brcmf_bus_debugfs_create
12. brcmf_bus_reset

   1 // SPDX-License-Identifier: ISC
   2 /*
   3  * Copyright (c) 2010 Broadcom Corporation
   4  */
   5 
   6 #ifndef BRCMFMAC_BUS_H
   7 #define BRCMFMAC_BUS_H
   8 
   9 #include "debug.h"
  10 
  11 /* IDs of the 6 default common rings of msgbuf protocol */
  12 #define BRCMF_H2D_MSGRING_CONTROL_SUBMIT        0
  13 #define BRCMF_H2D_MSGRING_RXPOST_SUBMIT         1
  14 #define BRCMF_H2D_MSGRING_FLOWRING_IDSTART      2
  15 #define BRCMF_D2H_MSGRING_CONTROL_COMPLETE      2
  16 #define BRCMF_D2H_MSGRING_TX_COMPLETE           3
  17 #define BRCMF_D2H_MSGRING_RX_COMPLETE           4
  18 
  19 
  20 #define BRCMF_NROF_H2D_COMMON_MSGRINGS          2
  21 #define BRCMF_NROF_D2H_COMMON_MSGRINGS          3
  22 #define BRCMF_NROF_COMMON_MSGRINGS      (BRCMF_NROF_H2D_COMMON_MSGRINGS + \
  23                                          BRCMF_NROF_D2H_COMMON_MSGRINGS)
  24 
  25 /* The level of bus communication with the dongle */
  26 enum brcmf_bus_state {
  27         BRCMF_BUS_DOWN,         /* Not ready for frame transfers */
  28         BRCMF_BUS_UP            /* Ready for frame transfers */
  29 };
  30 
  31 /* The level of bus communication with the dongle */
  32 enum brcmf_bus_protocol_type {
  33         BRCMF_PROTO_BCDC,
  34         BRCMF_PROTO_MSGBUF
  35 };
  36 
  37 struct brcmf_mp_device;
  38 
  39 struct brcmf_bus_dcmd {
  40         char *name;
  41         char *param;
  42         int param_len;
  43         struct list_head list;
  44 };
  45 
  46 /**
  47  * struct brcmf_bus_ops - bus callback operations.
  48  *
  49  * @preinit: execute bus/device specific dongle init commands (optional).
  50  * @init: prepare for communication with dongle.
  51  * @stop: clear pending frames, disable data flow.
  52  * @txdata: send a data frame to the dongle. When the data
  53  *      has been transferred, the common driver must be
  54  *      notified using brcmf_txcomplete(). The common
  55  *      driver calls this function with interrupts
  56  *      disabled.
  57  * @txctl: transmit a control request message to dongle.
  58  * @rxctl: receive a control response message from dongle.
  59  * @gettxq: obtain a reference of bus transmit queue (optional).
  60  * @wowl_config: specify if dongle is configured for wowl when going to suspend
  61  * @get_ramsize: obtain size of device memory.
  62  * @get_memdump: obtain device memory dump in provided buffer.
  63  * @get_fwname: obtain firmware name.
  64  *
  65  * This structure provides an abstract interface towards the
  66  * bus specific driver. For control messages to common driver
  67  * will assure there is only one active transaction. Unless
  68  * indicated otherwise these callbacks are mandatory.
  69  */
  70 struct brcmf_bus_ops {
  71         int (*preinit)(struct device *dev);
  72         void (*stop)(struct device *dev);
  73         int (*txdata)(struct device *dev, struct sk_buff *skb);
  74         int (*txctl)(struct device *dev, unsigned char *msg, uint len);
  75         int (*rxctl)(struct device *dev, unsigned char *msg, uint len);
  76         struct pktq * (*gettxq)(struct device *dev);
  77         void (*wowl_config)(struct device *dev, bool enabled);
  78         size_t (*get_ramsize)(struct device *dev);
  79         int (*get_memdump)(struct device *dev, void *data, size_t len);
  80         int (*get_fwname)(struct device *dev, const char *ext,
  81                           unsigned char *fw_name);
  82         void (*debugfs_create)(struct device *dev);
  83         int (*reset)(struct device *dev);
  84 };
  85 
  86 
  87 /**
  88  * struct brcmf_bus_msgbuf - bus ringbuf if in case of msgbuf.
  89  *
  90  * @commonrings: commonrings which are always there.
  91  * @flowrings: commonrings which are dynamically created and destroyed for data.
  92  * @rx_dataoffset: if set then all rx data has this this offset.
  93  * @max_rxbufpost: maximum number of buffers to post for rx.
  94  * @max_flowrings: maximum number of tx flow rings supported.
  95  * @max_submissionrings: maximum number of submission rings(h2d) supported.
  96  * @max_completionrings: maximum number of completion rings(d2h) supported.
  97  */
  98 struct brcmf_bus_msgbuf {
  99         struct brcmf_commonring *commonrings[BRCMF_NROF_COMMON_MSGRINGS];
 100         struct brcmf_commonring **flowrings;
 101         u32 rx_dataoffset;
 102         u32 max_rxbufpost;
 103         u16 max_flowrings;
 104         u16 max_submissionrings;
 105         u16 max_completionrings;
 106 };
 107 
 108 
 109 /**
 110  * struct brcmf_bus_stats - bus statistic counters.
 111  *
 112  * @pktcowed: packets cowed for extra headroom/unorphan.
 113  * @pktcow_failed: packets dropped due to failed cow-ing.
 114  */
 115 struct brcmf_bus_stats {
 116         atomic_t pktcowed;
 117         atomic_t pktcow_failed;
 118 };
 119 
 120 /**
 121  * struct brcmf_bus - interface structure between common and bus layer
 122  *
 123  * @bus_priv: pointer to private bus device.
 124  * @proto_type: protocol type, bcdc or msgbuf
 125  * @dev: device pointer of bus device.
 126  * @drvr: public driver information.
 127  * @state: operational state of the bus interface.
 128  * @stats: statistics shared between common and bus layer.
 129  * @maxctl: maximum size for rxctl request message.
 130  * @chip: device identifier of the dongle chip.
 131  * @always_use_fws_queue: bus wants use queue also when fwsignal is inactive.
 132  * @wowl_supported: is wowl supported by bus driver.
 133  * @chiprev: revision of the dongle chip.
 134  * @msgbuf: msgbuf protocol parameters provided by bus layer.
 135  */
 136 struct brcmf_bus {
 137         union {
 138                 struct brcmf_sdio_dev *sdio;
 139                 struct brcmf_usbdev *usb;
 140                 struct brcmf_pciedev *pcie;
 141         } bus_priv;
 142         enum brcmf_bus_protocol_type proto_type;
 143         struct device *dev;
 144         struct brcmf_pub *drvr;
 145         enum brcmf_bus_state state;
 146         struct brcmf_bus_stats stats;
 147         uint maxctl;
 148         u32 chip;
 149         u32 chiprev;
 150         bool always_use_fws_queue;
 151         bool wowl_supported;
 152 
 153         const struct brcmf_bus_ops *ops;
 154         struct brcmf_bus_msgbuf *msgbuf;
 155 };
 156 
 157 /*
 158  * callback wrappers
 159  */
 160 static inline int brcmf_bus_preinit(struct brcmf_bus *bus)
 161 {
 162         if (!bus->ops->preinit)
 163                 return 0;
 164         return bus->ops->preinit(bus->dev);
 165 }
 166 
 167 static inline void brcmf_bus_stop(struct brcmf_bus *bus)
 168 {
 169         bus->ops->stop(bus->dev);
 170 }
 171 
 172 static inline int brcmf_bus_txdata(struct brcmf_bus *bus, struct sk_buff *skb)
 173 {
 174         return bus->ops->txdata(bus->dev, skb);
 175 }
 176 
 177 static inline
 178 int brcmf_bus_txctl(struct brcmf_bus *bus, unsigned char *msg, uint len)
 179 {
 180         return bus->ops->txctl(bus->dev, msg, len);
 181 }
 182 
 183 static inline
 184 int brcmf_bus_rxctl(struct brcmf_bus *bus, unsigned char *msg, uint len)
 185 {
 186         return bus->ops->rxctl(bus->dev, msg, len);
 187 }
 188 
 189 static inline
 190 struct pktq *brcmf_bus_gettxq(struct brcmf_bus *bus)
 191 {
 192         if (!bus->ops->gettxq)
 193                 return ERR_PTR(-ENOENT);
 194 
 195         return bus->ops->gettxq(bus->dev);
 196 }
 197 
 198 static inline
 199 void brcmf_bus_wowl_config(struct brcmf_bus *bus, bool enabled)
 200 {
 201         if (bus->ops->wowl_config)
 202                 bus->ops->wowl_config(bus->dev, enabled);
 203 }
 204 
 205 static inline size_t brcmf_bus_get_ramsize(struct brcmf_bus *bus)
 206 {
 207         if (!bus->ops->get_ramsize)
 208                 return 0;
 209 
 210         return bus->ops->get_ramsize(bus->dev);
 211 }
 212 
 213 static inline
 214 int brcmf_bus_get_memdump(struct brcmf_bus *bus, void *data, size_t len)
 215 {
 216         if (!bus->ops->get_memdump)
 217                 return -EOPNOTSUPP;
 218 
 219         return bus->ops->get_memdump(bus->dev, data, len);
 220 }
 221 
 222 static inline
 223 int brcmf_bus_get_fwname(struct brcmf_bus *bus, const char *ext,
 224                          unsigned char *fw_name)
 225 {
 226         return bus->ops->get_fwname(bus->dev, ext, fw_name);
 227 }
 228 
 229 static inline
 230 void brcmf_bus_debugfs_create(struct brcmf_bus *bus)
 231 {
 232         if (!bus->ops->debugfs_create)
 233                 return;
 234 
 235         return bus->ops->debugfs_create(bus->dev);
 236 }
 237 
 238 static inline
 239 int brcmf_bus_reset(struct brcmf_bus *bus)
 240 {
 241         if (!bus->ops->reset)
 242                 return -EOPNOTSUPP;
 243 
 244         return bus->ops->reset(bus->dev);
 245 }
 246 
 247 /*
 248  * interface functions from common layer
 249  */
 250 
 251 /* Receive frame for delivery to OS.  Callee disposes of rxp. */
 252 void brcmf_rx_frame(struct device *dev, struct sk_buff *rxp, bool handle_event);
 253 /* Receive async event packet from firmware. Callee disposes of rxp. */
 254 void brcmf_rx_event(struct device *dev, struct sk_buff *rxp);
 255 
 256 int brcmf_alloc(struct device *dev, struct brcmf_mp_device *settings);
 257 /* Indication from bus module regarding presence/insertion of dongle. */
 258 int brcmf_attach(struct device *dev);
 259 /* Indication from bus module regarding removal/absence of dongle */
 260 void brcmf_detach(struct device *dev);
 261 void brcmf_free(struct device *dev);
 262 /* Indication from bus module that dongle should be reset */
 263 void brcmf_dev_reset(struct device *dev);
 264 /* Request from bus module to initiate a coredump */
 265 void brcmf_dev_coredump(struct device *dev);
 266 /* Indication that firmware has halted or crashed */
 267 void brcmf_fw_crashed(struct device *dev);
 268 
 269 /* Configure the "global" bus state used by upper layers */
 270 void brcmf_bus_change_state(struct brcmf_bus *bus, enum brcmf_bus_state state);
 271 
 272 s32 brcmf_iovar_data_set(struct device *dev, char *name, void *data, u32 len);
 273 void brcmf_bus_add_txhdrlen(struct device *dev, uint len);
 274 
 275 #ifdef CONFIG_BRCMFMAC_SDIO
 276 void brcmf_sdio_exit(void);
 277 void brcmf_sdio_register(void);
 278 #endif
 279 #ifdef CONFIG_BRCMFMAC_USB
 280 void brcmf_usb_exit(void);
 281 void brcmf_usb_register(void);
 282 #endif
 283 
 284 #endif /* BRCMFMAC_BUS_H */