LXR linux/drivers/usb/host/fhci-mem.c

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * Freescale QUICC Engine USB Host Controller Driver
   4 *
   5 * Copyright (c) Freescale Semicondutor, Inc. 2006.
   6 *               Shlomi Gridish <gridish@freescale.com>
   7 *               Jerry Huang <Chang-Ming.Huang@freescale.com>
   8 * Copyright (c) Logic Product Development, Inc. 2007
   9 *               Peter Barada <peterb@logicpd.com>
  10 * Copyright (c) MontaVista Software, Inc. 2008.
  11 *               Anton Vorontsov <avorontsov@ru.mvista.com>
  12 */
  13
  14#include <linux/kernel.h>
  15#include <linux/types.h>
  16#include <linux/delay.h>
  17#include <linux/slab.h>
  18#include <linux/list.h>
  19#include <linux/usb.h>
  20#include <linux/usb/hcd.h>
  21#include "fhci.h"
  22
  23static void init_td(struct td *td)
  24{
  25        memset(td, 0, sizeof(*td));
  26        INIT_LIST_HEAD(&td->node);
  27        INIT_LIST_HEAD(&td->frame_lh);
  28}
  29
  30static void init_ed(struct ed *ed)
  31{
  32        memset(ed, 0, sizeof(*ed));
  33        INIT_LIST_HEAD(&ed->td_list);
  34        INIT_LIST_HEAD(&ed->node);
  35}
  36
  37static struct td *get_empty_td(struct fhci_hcd *fhci)
  38{
  39        struct td *td;
  40
  41        if (!list_empty(&fhci->empty_tds)) {
  42                td = list_entry(fhci->empty_tds.next, struct td, node);
  43                list_del(fhci->empty_tds.next);
  44        } else {
  45                td = kmalloc(sizeof(*td), GFP_ATOMIC);
  46                if (!td)
  47                        fhci_err(fhci, "No memory to allocate to TD\n");
  48                else
  49                        init_td(td);
  50        }
  51
  52        return td;
  53}
  54
  55void fhci_recycle_empty_td(struct fhci_hcd *fhci, struct td *td)
  56{
  57        init_td(td);
  58        list_add(&td->node, &fhci->empty_tds);
  59}
  60
  61struct ed *fhci_get_empty_ed(struct fhci_hcd *fhci)
  62{
  63        struct ed *ed;
  64
  65        if (!list_empty(&fhci->empty_eds)) {
  66                ed = list_entry(fhci->empty_eds.next, struct ed, node);
  67                list_del(fhci->empty_eds.next);
  68        } else {
  69                ed = kmalloc(sizeof(*ed), GFP_ATOMIC);
  70                if (!ed)
  71                        fhci_err(fhci, "No memory to allocate to ED\n");
  72                else
  73                        init_ed(ed);
  74        }
  75
  76        return ed;
  77}
  78
  79void fhci_recycle_empty_ed(struct fhci_hcd *fhci, struct ed *ed)
  80{
  81        init_ed(ed);
  82        list_add(&ed->node, &fhci->empty_eds);
  83}
  84
  85struct td *fhci_td_fill(struct fhci_hcd *fhci, struct urb *urb,
  86                        struct urb_priv *urb_priv, struct ed *ed, u16 index,
  87                        enum fhci_ta_type type, int toggle, u8 *data, u32 len,
  88                        u16 interval, u16 start_frame, bool ioc)
  89{
  90        struct td *td = get_empty_td(fhci);
  91
  92        if (!td)
  93                return NULL;
  94
  95        td->urb = urb;
  96        td->ed = ed;
  97        td->type = type;
  98        td->toggle = toggle;
  99        td->data = data;
 100        td->len = len;
 101        td->iso_index = index;
 102        td->interval = interval;
 103        td->start_frame = start_frame;
 104        td->ioc = ioc;
 105        td->status = USB_TD_OK;
 106
 107        urb_priv->tds[index] = td;
 108
 109        return td;
 110}
 111