cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

fhci-mem.c (2458B)

      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}