scripts/Makefile.ubsan


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# SPDX-License-Identifier: GPL-2.0
ifdef CONFIG_UBSAN
      CFLAGS_UBSAN += $(call cc-option, -fsanitize=shift)
      CFLAGS_UBSAN += $(call cc-option, -fsanitize=integer-divide-by-zero)
      CFLAGS_UBSAN += $(call cc-option, -fsanitize=unreachable)
      CFLAGS_UBSAN += $(call cc-option, -fsanitize=signed-integer-overflow)
      CFLAGS_UBSAN += $(call cc-option, -fsanitize=bounds)
      CFLAGS_UBSAN += $(call cc-option, -fsanitize=object-size)
      CFLAGS_UBSAN += $(call cc-option, -fsanitize=bool)
      CFLAGS_UBSAN += $(call cc-option, -fsanitize=enum)

ifdef CONFIG_UBSAN_ALIGNMENT
      CFLAGS_UBSAN += $(call cc-option, -fsanitize=alignment)
endif

      # -fsanitize=* options makes GCC less smart than usual and
      # increase number of 'maybe-uninitialized false-positives
      CFLAGS_UBSAN += $(call cc-option, -Wno-maybe-uninitialized)
endif
/*
 *  Support for ColdFire CPU based boards using a NS8390 Ethernet device.
 *
 *  Derived from the many other 8390 drivers.
 *
 *  (C) Copyright 2012,  Greg Ungerer <gerg@uclinux.org>
 *
 *  This file is subject to the terms and conditions of the GNU General Public
 *  License.  See the file COPYING in the main directory of the Linux
 *  distribution for more details.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/platform_device.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/jiffies.h>
#include <linux/io.h>
#include <asm/mcf8390.h>

static const char version[] =
	"mcf8390.c: (15-06-2012) Greg Ungerer <gerg@uclinux.org>";

#define NE_CMD		0x00
#define NE_DATAPORT	0x10	/* NatSemi-defined port window offset */
#define NE_RESET	0x1f	/* Issue a read to reset ,a write to clear */
#define NE_EN0_ISR	0x07
#define NE_EN0_DCFG	0x0e
#define NE_EN0_RSARLO	0x08
#define NE_EN0_RSARHI	0x09
#define NE_EN0_RCNTLO	0x0a
#define NE_EN0_RXCR	0x0c
#define NE_EN0_TXCR	0x0d
#define NE_EN0_RCNTHI	0x0b
#define NE_EN0_IMR	0x0f

#define NESM_START_PG	0x40	/* First page of TX buffer */
#define NESM_STOP_PG	0x80	/* Last page +1 of RX ring */

#ifdef NE2000_ODDOFFSET
/*
 * A lot of the ColdFire boards use a separate address region for odd offset
 * register addresses. The following functions convert and map as required.
 * Note that the data port accesses are treated a little differently, and
 * always accessed via the insX/outsX functions.
 */
static inline u32 NE_PTR(u32 addr)
{
	if (addr & 1)
		return addr - 1 + NE2000_ODDOFFSET;
	return addr;
}

static inline u32 NE_DATA_PTR(u32 addr)
{
	return addr;
}

void ei_outb(u32 val, u32 addr)
{
	NE2000_BYTE *rp;

	rp = (NE2000_BYTE *) NE_PTR(addr);
	*rp = RSWAP(val);
}

#define	ei_inb	ei_inb
u8 ei_inb(u32 addr)
{
	NE2000_BYTE *rp, val;

	rp = (NE2000_BYTE *) NE_PTR(addr);
	val = *rp;
	return (u8) (RSWAP(val) & 0xff);
}

void ei_insb(u32 addr, void *vbuf, int len)
{
	NE2000_BYTE *rp, val;
	u8 *buf;

	buf = (u8 *) vbuf;
	rp = (NE2000_BYTE *) NE_DATA_PTR(addr);
	for (; (len > 0); len--) {
		val = *rp;
		*buf++ = RSWAP(val);
	}
}

void ei_insw(u32 addr, void *vbuf, int len)
{
	volatile u16 *rp;
	u16 w, *buf;

	buf = (u16 *) vbuf;
	rp = (volatile u16 *) NE_DATA_PTR(addr);
	for (; (len > 0); len--) {
		w = *rp;
		*buf++ = BSWAP(w);
	}
}

void ei_outsb(u32 addr, const void *vbuf, int len)
{
	NE2000_BYTE *rp, val;
	u8 *buf;

	buf = (u8 *) vbuf;
	rp = (NE2000_BYTE *) NE_DATA_PTR(addr);
	for (; (len > 0); len--) {
		val = *buf++;
		*rp = RSWAP(val);
	}
}

void ei_outsw(u32 addr, const void *vbuf, int len)
{
	volatile u16 *rp;
	u16 w, *buf;

	buf = (u16 *) vbuf;
	rp = (volatile u16 *) NE_DATA_PTR(addr);
	for (; (len > 0); len--) {
		w = *buf++;
		*rp = BSWAP(w);
	}
}

#else /* !NE2000_ODDOFFSET */

#define	ei_inb		inb
#define	ei_outb		outb
#define	ei_insb		insb
#define	ei_insw		insw
#define	ei_outsb	outsb
#define	ei_outsw	outsw

#endif /* !NE2000_ODDOFFSET */

#define	ei_inb_p	ei_inb
#define	ei_outb_p	ei_outb

#include "lib8390.c"

/*
 * Hard reset the card. This used to pause for the same period that a
 * 8390 reset command required, but that shouldn't be necessary.
 */
static void mcf8390_reset_8390(struct net_device *dev)
{
	unsigned long reset_start_time = jiffies;
	u32 addr = dev->base_addr;
	struct ei_device *ei_local = netdev_priv(dev);

	netif_dbg(ei_local, hw, dev, "resetting the 8390 t=%ld...\n", jiffies);

	ei_outb(ei_inb(addr + NE_RESET), addr + NE_RESET);

	ei_status.txing = 0;
	ei_status.dmaing = 0;

	/* This check _should_not_ be necessary, omit eventually. */
	while ((ei_inb(addr + NE_EN0_ISR) & ENISR_RESET) == 0) {
		if (time_after(jiffies, reset_start_time + 2 * HZ / 100)) {
			netdev_warn(dev, "%s: did not complete\n", __func__);
			break;
		}
	}

	ei_outb(ENISR_RESET, addr + NE_EN0_ISR);
}

/*
 * This *shouldn't* happen.
 * If it does, it's the last thing you'll see
 */
static void mcf8390_dmaing_err(const char *func, struct net_device *dev,
			       struct ei_device *ei_local)
{
	netdev_err(dev, "%s: DMAing conflict [DMAstat:%d][irqlock:%d]\n",
		func, ei_local->dmaing, ei_local->irqlock);
}

/*
 * Grab the 8390 specific header. Similar to the block_input routine, but
 * we don't need to be concerned with ring wrap as the header will be at
 * the start of a page, so we optimize accordingly.
 */
static void mcf8390_get_8390_hdr(struct net_device *dev,
				 struct e8390_pkt_hdr *hdr, int ring_page)
{
	struct ei_device *ei_local = netdev_priv(dev);
	u32 addr = dev->base_addr;

	if (ei_local->dmaing) {
		mcf8390_dmaing_err(__func__, dev, ei_local);
		return;
	}

	ei_local->dmaing |= 0x01;
	ei_outb(E8390_NODMA + E8390_PAGE0 + E8390_START, addr + NE_CMD);
	ei_outb(ENISR_RDC, addr + NE_EN0_ISR);
	ei_outb(sizeof(struct e8390_pkt_hdr), addr + NE_EN0_RCNTLO);
	ei_outb(0, addr + NE_EN0_RCNTHI);
	ei_outb(0, addr + NE_EN0_RSARLO);		/* On page boundary */
	ei_outb(ring_page, addr + NE_EN0_RSARHI);
	ei_outb(E8390_RREAD + E8390_START, addr + NE_CMD);

	ei_insw(addr + NE_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr) >> 1);

	outb(ENISR_RDC, addr + NE_EN0_ISR);	/* Ack intr */
	ei_local->dmaing &= ~0x01;

	hdr->count = cpu_to_le16(hdr->count);
}

/*
 * Block input and output, similar to the Crynwr packet driver.
 * If you are porting to a new ethercard, look at the packet driver source
 * for hints. The NEx000 doesn't share the on-board packet memory --
 * you have to put the packet out through the "remote DMA" dataport
 * using z_writeb.
 */
static void mcf8390_block_input(struct net_device *dev, int count,
				struct sk_buff *skb, int ring_offset)
{
	struct ei_device *ei_local = netdev_priv(dev);
	u32 addr = dev->base_addr;
	char *buf = skb->data;

	if (ei_local->dmaing) {
		mcf8390_dmaing_err(__func__, dev, ei_local);
		return;
	}

	ei_local->dmaing |= 0x01;
	ei_outb(E8390_NODMA + E8390_PAGE0 + E8390_START, addr + NE_CMD);
	ei_outb(ENISR_RDC, addr + NE_EN0_ISR);
	ei_outb(count & 0xff, addr + NE_EN0_RCNTLO);
	ei_outb(count >> 8, addr + NE_EN0_RCNTHI);
	ei_outb(ring_offset & 0xff, addr + NE_EN0_RSARLO);
	ei_outb(ring_offset >> 8, addr + NE_EN0_RSARHI);
	ei_outb(E8390_RREAD + E8390_START, addr + NE_CMD);

	ei_insw(addr + NE_DATAPORT, buf, count >> 1);
	if (count & 1)
		buf[count - 1] = ei_inb(addr + NE_DATAPORT);

	ei_outb(ENISR_RDC, addr +