// SPDX-License-Identifier: GPL-2.0-or-later
/*
Broadcom B43legacy wireless driver
DMA ringbuffer and descriptor allocation/management
Copyright (c) 2005, 2006 Michael Buesch <m@bues.ch>
Some code in this file is derived from the b44.c driver
Copyright (C) 2002 David S. Miller
Copyright (C) Pekka Pietikainen
*/
#include "b43legacy.h"
#include "dma.h"
#include "main.h"
#include "debugfs.h"
#include "xmit.h"
#include <linux/dma-mapping.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/skbuff.h>
#include <linux/slab.h>
#include <net/dst.h>
/* 32bit DMA ops. */
static
struct b43legacy_dmadesc32 *op32_idx2desc(struct b43legacy_dmaring *ring,
int slot,
struct b43legacy_dmadesc_meta **meta)
{
struct b43legacy_dmadesc32 *desc;
*meta = &(ring->meta[slot]);
desc = ring->descbase;
desc = &(desc[slot]);
return desc;
}
static void op32_fill_descriptor(struct b43legacy_dmaring *ring,
struct b43legacy_dmadesc32 *desc,
dma_addr_t dmaaddr, u16 bufsize,
int start, int end, int irq)
{
struct b43legacy_dmadesc32 *descbase = ring->descbase;
int slot;
u32 ctl;
u32 addr;
u32 addrext;
slot = (int)(desc - descbase);
B43legacy_WARN_ON(!(slot >= 0 && slot < ring->nr_slots));
addr = (u32)(dmaaddr & ~SSB_DMA_TRANSLATION_MASK);
addrext = (u32)(dmaaddr & SSB_DMA_TRANSLATION_MASK)
>> SSB_DMA_TRANSLATION_SHIFT;
addr |= ring->dev->dma.translation;
ctl = (bufsize - ring->frameoffset)
& B43legacy_DMA32_DCTL_BYTECNT;
if (slot == ring->nr_slots - 1)
ctl |= B43legacy_DMA32_DCTL_DTABLEEND;
if (start)
ctl |= B43legacy_DMA32_DCTL_FRAMESTART;
if (end)
ctl |= B43legacy_DMA32_DCTL_FRAMEEND;
if (irq)
ctl |= B43legacy_DMA32_DCTL_IRQ;
ctl |= (addrext << B43legacy_DMA32_DCTL_ADDREXT_SHIFT)
& B43legacy_DMA32_DCTL_ADDREXT_MASK;
desc->control = cpu_to_le32(ctl);
desc->address = cpu_to_le32(addr);
}
static void op32_poke_tx(struct b43legacy_dmaring *ring, int slot)
{
b43legacy_dma_write(ring, 