sys/dev/usb/usb_transfer.h

   1 /* $FreeBSD$ */
   2 /*-
   3  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   4  *
   5  * Copyright (c) 2008 Hans Petter Selasky. All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  */
  28
  29 #ifndef _USB_TRANSFER_H_
  30 #define _USB_TRANSFER_H_
  31
  32 /*
  33  * Definition of internal USB transfer states:
  34  * ===========================================
  35  *
  36  * The main reason there are many USB states is that we are allowed to
  37  * cancel USB transfers, then start the USB transfer again and that
  38  * this state transaction cannot always be done in a single atomic
  39  * operation without blocking the calling thread. One reason for this
  40  * is that the USB hardware sometimes needs to wait for DMA
  41  * controllers to finish which is done asynchronously and grows the
  42  * statemachine.
  43  *
  44  * When extending the following statemachine there are basically two
  45  * things you should think about: Which states should be executed or
  46  * modified in case of USB transfer stop and which states should be
  47  * executed or modified in case of USB transfer start. Also respect
  48  * the "can_cancel_immed" flag which basically tells if you can go
  49  * directly from a wait state to the cancelling states.
  50  */
  51
  52 enum {
  53         /* XFER start execute state */
  54
  55         /* USB_ST_SETUP = 0 (already defined) */
  56
  57         /* XFER transferred execute state */
  58
  59         /* USB_ST_TRANSFERRED = 1 (already defined) */
  60
  61         /* XFER error execute state */
  62
  63         /* USB_ST_ERROR = 2 (already defined) */
  64
  65         /* XFER restart after error execute state */
  66
  67         USB_ST_RESTART = 8,
  68
  69         /* XFER transfer idle state */
  70
  71         USB_ST_WAIT_SETUP,
  72
  73         /* Other XFER execute states */
  74
  75         USB_ST_PIPE_OPEN = 16,
  76         USB_ST_PIPE_OPEN_ERROR,
  77         USB_ST_PIPE_OPEN_RESTART,
  78
  79         USB_ST_BDMA_LOAD,
  80         USB_ST_BDMA_LOAD_ERROR,
  81         USB_ST_BDMA_LOAD_RESTART,
  82
  83         USB_ST_IVAL_DLY,
  84         USB_ST_IVAL_DLY_ERROR,
  85         USB_ST_IVAL_DLY_RESTART,
  86
  87         USB_ST_PIPE_STALL,
  88         USB_ST_PIPE_STALL_ERROR,
  89         USB_ST_PIPE_STALL_RESTART,
  90
  91         USB_ST_ENTER,
  92         USB_ST_ENTER_ERROR,
  93         USB_ST_ENTER_RESTART,
  94
  95         USB_ST_START,
  96         USB_ST_START_ERROR,
  97         USB_ST_START_RESTART,
  98
  99         USB_ST_PIPE_CLOSE,
 100         USB_ST_PIPE_CLOSE_ERROR,
 101         USB_ST_PIPE_CLOSE_RESTART,
 102
 103         USB_ST_BDMA_DLY,
 104         USB_ST_BDMA_DLY_ERROR,
 105         USB_ST_BDMA_DLY_RESTART,
 106
 107         /* XFER transfer wait states */
 108
 109         USB_ST_WAIT_PIPE_OPEN = 64,
 110         USB_ST_WAIT_PIPE_OPEN_ERROR,
 111         USB_ST_WAIT_PIPE_OPEN_RESTART,
 112
 113         USB_ST_WAIT_BDMA_LOAD,
 114         USB_ST_WAIT_BDMA_LOAD_ERROR,
 115         USB_ST_WAIT_BDMA_LOAD_RESTART,
 116
 117         USB_ST_WAIT_IVAL_DLY,
 118         USB_ST_WAIT_IVAL_DLY_ERROR,
 119         USB_ST_WAIT_IVAL_DLY_RESTART,
 120
 121         USB_ST_WAIT_PIPE_STALL,
 122         USB_ST_WAIT_PIPE_STALL_ERROR,
 123         USB_ST_WAIT_PIPE_STALL_RESTART,
 124
 125         USB_ST_WAIT_ENTER,
 126         USB_ST_WAIT_ENTER_ERROR,
 127         USB_ST_WAIT_ENTER_RESTART,
 128
 129         USB_ST_WAIT_START,
 130         USB_ST_WAIT_START_ERROR,
 131         USB_ST_WAIT_START_RESTART,
 132
 133         USB_ST_WAIT_PIPE_CLOSE,
 134         USB_ST_WAIT_PIPE_CLOSE_ERROR,
 135         USB_ST_WAIT_PIPE_CLOSE_RESTART,
 136
 137         USB_ST_WAIT_BDMA_DLY,
 138         USB_ST_WAIT_BDMA_DLY_ERROR,
 139         USB_ST_WAIT_BDMA_DLY_RESTART,
 140
 141         USB_ST_WAIT_TRANSFERRED,
 142         USB_ST_WAIT_TRANSFERRED_ERROR,
 143         USB_ST_WAIT_TRANSFERRED_RESTART,
 144 };
 145
 146 /*
 147  * The following structure defines the messages that is used to signal
 148  * the "done_p" USB process.
 149  */
 150 struct usb_done_msg {
 151         struct usb_proc_msg hdr;
 152         struct usb_xfer_root *xroot;
 153 };
 154
 155 #define USB_DMATAG_TO_XROOT(dpt)                                \
 156         __containerof(dpt, struct usb_xfer_root, dma_parent_tag)
 157
 158 /*
 159  * The following structure is used to keep information about memory
 160  * that should be automatically freed at the moment all USB transfers
 161  * have been freed.
 162  */
 163 struct usb_xfer_root {
 164         struct usb_dma_parent_tag dma_parent_tag;
 165 #if USB_HAVE_BUSDMA
 166         struct usb_xfer_queue dma_q;
 167 #endif
 168         struct usb_xfer_queue done_q;
 169         struct usb_done_msg done_m[2];
 170         struct cv cv_drain;
 171
 172         struct usb_process *done_p;     /* pointer to callback process */
 173         void   *memory_base;
 174         struct mtx *xfer_mtx;   /* cannot be changed during operation */
 175 #if USB_HAVE_BUSDMA
 176         struct usb_page_cache *dma_page_cache_start;
 177         struct usb_page_cache *dma_page_cache_end;
 178 #endif
 179         struct usb_page_cache *xfer_page_cache_start;
 180         struct usb_page_cache *xfer_page_cache_end;
 181         struct usb_bus *bus;            /* pointer to USB bus (cached) */
 182         struct usb_device *udev;        /* pointer to USB device */
 183
 184         usb_size_t memory_size;
 185         usb_size_t setup_refcount;
 186 #if USB_HAVE_BUSDMA
 187         usb_frcount_t dma_nframes;      /* number of page caches to load */
 188         usb_frcount_t dma_currframe;    /* currect page cache number */
 189         usb_frlength_t dma_frlength_0;  /* length of page cache zero */
 190         uint8_t dma_error;              /* set if virtual memory could not be
 191                                          * loaded */
 192 #endif
 193         uint8_t done_sleep;             /* set if done thread is sleeping */
 194 };
 195
 196 /*
 197  * The following structure is used when setting up an array of USB
 198  * transfers.
 199  */
 200 struct usb_setup_params {
 201         struct usb_dma_tag *dma_tag_p;
 202         struct usb_page *dma_page_ptr;
 203         struct usb_page_cache *dma_page_cache_ptr;      /* these will be
 204                                                          * auto-freed */
 205         struct usb_page_cache *xfer_page_cache_ptr;     /* these will not be
 206                                                          * auto-freed */
 207         struct usb_device *udev;
 208         struct usb_xfer *curr_xfer;
 209         const struct usb_config *curr_setup;
 210         const struct usb_pipe_methods *methods;
 211         void   *buf;
 212         usb_frlength_t *xfer_length_ptr;
 213
 214         usb_size_t size[7];
 215         usb_frlength_t bufsize;
 216         usb_frlength_t bufsize_max;
 217
 218         uint32_t hc_max_frame_size;
 219         uint16_t hc_max_packet_size;
 220         uint8_t hc_max_packet_count;
 221         enum usb_dev_speed speed;
 222         uint8_t dma_tag_max;
 223         usb_error_t err;
 224 };
 225
 226 /* function prototypes */
 227
 228 uint8_t usbd_transfer_setup_sub_malloc(struct usb_setup_params *parm,
 229             struct usb_page_cache **ppc, usb_size_t size, usb_size_t align,
 230             usb_size_t count);
 231 void    usb_dma_delay_done_cb(struct usb_xfer *);
 232 void    usb_command_wrapper(struct usb_xfer_queue *pq,
 233             struct usb_xfer *xfer);
 234 void    usbd_pipe_enter(struct usb_xfer *xfer);
 235 void    usbd_pipe_start(struct usb_xfer_queue *pq);
 236 void    usbd_transfer_dequeue(struct usb_xfer *xfer);
 237 void    usbd_transfer_done(struct usb_xfer *xfer, usb_error_t error);
 238 void    usbd_transfer_enqueue(struct usb_xfer_queue *pq,
 239             struct usb_xfer *xfer);
 240 void    usbd_transfer_setup_sub(struct usb_setup_params *parm);
 241 void    usbd_ctrl_transfer_setup(struct usb_device *udev);
 242 void    usbd_clear_stall_locked(struct usb_device *udev,
 243             struct usb_endpoint *ep);
 244 void    usbd_clear_data_toggle(struct usb_device *udev,
 245             struct usb_endpoint *ep);
 246 usb_callback_t usbd_do_request_callback;
 247 usb_callback_t usb_handle_request_callback;
 248 usb_callback_t usb_do_clear_stall_callback;
 249 void    usbd_transfer_timeout_ms(struct usb_xfer *xfer,
 250             void (*cb) (void *arg), usb_timeout_t ms);
 251 usb_timeout_t usbd_get_dma_delay(struct usb_device *udev);
 252 void    usbd_transfer_power_ref(struct usb_xfer *xfer, int val);
 253
 254 #endif                                  /* _USB_TRANSFER_H_ */