cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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mantis_evm.c (3179B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3	Mantis PCI bridge driver
      4
      5	Copyright (C) Manu Abraham (abraham.manu@gmail.com)
      6
      7*/
      8
      9#include <linux/kernel.h>
     10
     11#include <linux/signal.h>
     12#include <linux/sched.h>
     13#include <linux/interrupt.h>
     14#include <asm/io.h>
     15
     16#include <media/dmxdev.h>
     17#include <media/dvbdev.h>
     18#include <media/dvb_demux.h>
     19#include <media/dvb_frontend.h>
     20#include <media/dvb_net.h>
     21
     22#include "mantis_common.h"
     23#include "mantis_link.h"
     24#include "mantis_hif.h"
     25#include "mantis_reg.h"
     26
     27static void mantis_hifevm_work(struct work_struct *work)
     28{
     29	struct mantis_ca *ca = container_of(work, struct mantis_ca, hif_evm_work);
     30	struct mantis_pci *mantis = ca->ca_priv;
     31
     32	u32 gpif_stat;
     33
     34	gpif_stat = mmread(MANTIS_GPIF_STATUS);
     35
     36	if (gpif_stat & MANTIS_GPIF_DETSTAT) {
     37		if (gpif_stat & MANTIS_CARD_PLUGIN) {
     38			dprintk(MANTIS_DEBUG, 1, "Event Mgr: Adapter(%d) Slot(0): CAM Plugin", mantis->num);
     39			mmwrite(0xdada0000, MANTIS_CARD_RESET);
     40			mantis_event_cam_plugin(ca);
     41			dvb_ca_en50221_camchange_irq(&ca->en50221,
     42						     0,
     43						     DVB_CA_EN50221_CAMCHANGE_INSERTED);
     44		}
     45	} else {
     46		if (gpif_stat & MANTIS_CARD_PLUGOUT) {
     47			dprintk(MANTIS_DEBUG, 1, "Event Mgr: Adapter(%d) Slot(0): CAM Unplug", mantis->num);
     48			mmwrite(0xdada0000, MANTIS_CARD_RESET);
     49			mantis_event_cam_unplug(ca);
     50			dvb_ca_en50221_camchange_irq(&ca->en50221,
     51						     0,
     52						     DVB_CA_EN50221_CAMCHANGE_REMOVED);
     53		}
     54	}
     55
     56	if (mantis->gpif_status & MANTIS_GPIF_EXTIRQ)
     57		dprintk(MANTIS_DEBUG, 1, "Event Mgr: Adapter(%d) Slot(0): Ext IRQ", mantis->num);
     58
     59	if (mantis->gpif_status & MANTIS_SBUF_WSTO)
     60		dprintk(MANTIS_DEBUG, 1, "Event Mgr: Adapter(%d) Slot(0): Smart Buffer Timeout", mantis->num);
     61
     62	if (mantis->gpif_status & MANTIS_GPIF_OTHERR)
     63		dprintk(MANTIS_DEBUG, 1, "Event Mgr: Adapter(%d) Slot(0): Alignment Error", mantis->num);
     64
     65	if (gpif_stat & MANTIS_SBUF_OVFLW)
     66		dprintk(MANTIS_DEBUG, 1, "Event Mgr: Adapter(%d) Slot(0): Smart Buffer Overflow", mantis->num);
     67
     68	if (gpif_stat & MANTIS_GPIF_BRRDY)
     69		dprintk(MANTIS_DEBUG, 1, "Event Mgr: Adapter(%d) Slot(0): Smart Buffer Read Ready", mantis->num);
     70
     71	if (gpif_stat & MANTIS_GPIF_INTSTAT)
     72		dprintk(MANTIS_DEBUG, 1, "Event Mgr: Adapter(%d) Slot(0): GPIF IRQ", mantis->num);
     73
     74	if (gpif_stat & MANTIS_SBUF_EMPTY)
     75		dprintk(MANTIS_DEBUG, 1, "Event Mgr: Adapter(%d) Slot(0): Smart Buffer Empty", mantis->num);
     76
     77	if (gpif_stat & MANTIS_SBUF_OPDONE) {
     78		dprintk(MANTIS_DEBUG, 1, "Event Mgr: Adapter(%d) Slot(0): Smart Buffer operation complete", mantis->num);
     79		ca->sbuf_status = MANTIS_SBUF_DATA_AVAIL;
     80		ca->hif_event = MANTIS_SBUF_OPDONE;
     81		wake_up(&ca->hif_opdone_wq);
     82	}
     83}
     84
     85int mantis_evmgr_init(struct mantis_ca *ca)
     86{
     87	struct mantis_pci *mantis = ca->ca_priv;
     88
     89	dprintk(MANTIS_DEBUG, 1, "Initializing Mantis Host I/F Event manager");
     90	INIT_WORK(&ca->hif_evm_work, mantis_hifevm_work);
     91	mantis_pcmcia_init(ca);
     92	schedule_work(&ca->hif_evm_work);
     93	mantis_hif_init(ca);
     94	return 0;
     95}
     96
     97void mantis_evmgr_exit(struct mantis_ca *ca)
     98{
     99	struct mantis_pci *mantis = ca->ca_priv;
    100
    101	dprintk(MANTIS_DEBUG, 1, "Mantis Host I/F Event manager exiting");
    102	flush_work(&ca->hif_evm_work);
    103	mantis_hif_exit(ca);
    104	mantis_pcmcia_exit(ca);
    105}