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Diffstat (limited to 'sound/isa/gus/gus_dma.c')
-rw-r--r--sound/isa/gus/gus_dma.c148
1 files changed, 67 insertions, 81 deletions
diff --git a/sound/isa/gus/gus_dma.c b/sound/isa/gus/gus_dma.c
index 7f95f452f106..ffc69e26227e 100644
--- a/sound/isa/gus/gus_dma.c
+++ b/sound/isa/gus/gus_dma.c
@@ -1,22 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Routines for GF1 DMA control
* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
- *
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
*/
#include <asm/dma.h>
@@ -26,12 +11,9 @@
static void snd_gf1_dma_ack(struct snd_gus_card * gus)
{
- unsigned long flags;
-
- spin_lock_irqsave(&gus->reg_lock, flags);
+ guard(spinlock_irqsave)(&gus->reg_lock);
snd_gf1_write8(gus, SNDRV_GF1_GB_DRAM_DMA_CONTROL, 0x00);
snd_gf1_look8(gus, SNDRV_GF1_GB_DRAM_DMA_CONTROL);
- spin_unlock_irqrestore(&gus->reg_lock, flags);
}
static void snd_gf1_dma_program(struct snd_gus_card * gus,
@@ -40,20 +22,22 @@ static void snd_gf1_dma_program(struct snd_gus_card * gus,
unsigned int count,
unsigned int cmd)
{
- unsigned long flags;
unsigned int address;
unsigned char dma_cmd;
unsigned int address_high;
- snd_printdd("dma_transfer: addr=0x%x, buf=0x%lx, count=0x%x\n",
- addr, buf_addr, count);
+ dev_dbg(gus->card->dev,
+ "dma_transfer: addr=0x%x, buf=0x%lx, count=0x%x\n",
+ addr, buf_addr, count);
if (gus->gf1.dma1 > 3) {
if (gus->gf1.enh_mode) {
address = addr >> 1;
} else {
if (addr & 0x1f) {
- snd_printd("snd_gf1_dma_transfer: unaligned address (0x%x)?\n", addr);
+ dev_dbg(gus->card->dev,
+ "%s: unaligned address (0x%x)?\n",
+ __func__, addr);
return;
}
address = (addr & 0x000c0000) | ((addr & 0x0003ffff) >> 1);
@@ -78,10 +62,11 @@ static void snd_gf1_dma_program(struct snd_gus_card * gus,
snd_gf1_dma_ack(gus);
snd_dma_program(gus->gf1.dma1, buf_addr, count, dma_cmd & SNDRV_GF1_DMA_READ ? DMA_MODE_READ : DMA_MODE_WRITE);
#if 0
- snd_printk(KERN_DEBUG "address = 0x%x, count = 0x%x, dma_cmd = 0x%x\n",
- address << 1, count, dma_cmd);
+ dev_dbg(gus->card->dev,
+ "address = 0x%x, count = 0x%x, dma_cmd = 0x%x\n",
+ address << 1, count, dma_cmd);
#endif
- spin_lock_irqsave(&gus->reg_lock, flags);
+ guard(spinlock_irqsave)(&gus->reg_lock);
if (gus->gf1.enh_mode) {
address_high = ((address >> 16) & 0x000000f0) | (address & 0x0000000f);
snd_gf1_write16(gus, SNDRV_GF1_GW_DRAM_DMA_LOW, (unsigned short) (address >> 4));
@@ -89,7 +74,6 @@ static void snd_gf1_dma_program(struct snd_gus_card * gus,
} else
snd_gf1_write16(gus, SNDRV_GF1_GW_DRAM_DMA_LOW, (unsigned short) (address >> 4));
snd_gf1_write8(gus, SNDRV_GF1_GB_DRAM_DMA_CONTROL, dma_cmd);
- spin_unlock_irqrestore(&gus->reg_lock, flags);
}
static struct snd_gf1_dma_block *snd_gf1_dma_next_block(struct snd_gus_card * gus)
@@ -131,39 +115,37 @@ static void snd_gf1_dma_interrupt(struct snd_gus_card * gus)
snd_gf1_dma_ack(gus);
if (gus->gf1.dma_ack)
gus->gf1.dma_ack(gus, gus->gf1.dma_private_data);
- spin_lock(&gus->dma_lock);
- if (gus->gf1.dma_data_pcm == NULL &&
- gus->gf1.dma_data_synth == NULL) {
- gus->gf1.dma_ack = NULL;
- gus->gf1.dma_flags &= ~SNDRV_GF1_DMA_TRIGGER;
- spin_unlock(&gus->dma_lock);
- return;
+ scoped_guard(spinlock, &gus->dma_lock) {
+ if (gus->gf1.dma_data_pcm == NULL &&
+ gus->gf1.dma_data_synth == NULL) {
+ gus->gf1.dma_ack = NULL;
+ gus->gf1.dma_flags &= ~SNDRV_GF1_DMA_TRIGGER;
+ return;
+ }
+ block = snd_gf1_dma_next_block(gus);
}
- block = snd_gf1_dma_next_block(gus);
- spin_unlock(&gus->dma_lock);
+ if (!block)
+ return;
snd_gf1_dma_program(gus, block->addr, block->buf_addr, block->count, (unsigned short) block->cmd);
kfree(block);
#if 0
- snd_printd(KERN_DEBUG "program dma (IRQ) - "
- "addr = 0x%x, buffer = 0x%lx, count = 0x%x, cmd = 0x%x\n",
- block->addr, block->buf_addr, block->count, block->cmd);
+ dev_dbg(gus->card->dev,
+ "program dma (IRQ) - addr = 0x%x, buffer = 0x%lx, count = 0x%x, cmd = 0x%x\n",
+ block->addr, block->buf_addr, block->count, block->cmd);
#endif
}
int snd_gf1_dma_init(struct snd_gus_card * gus)
{
- mutex_lock(&gus->dma_mutex);
+ guard(mutex)(&gus->dma_mutex);
gus->gf1.dma_shared++;
- if (gus->gf1.dma_shared > 1) {
- mutex_unlock(&gus->dma_mutex);
+ if (gus->gf1.dma_shared > 1)
return 0;
- }
gus->gf1.interrupt_handler_dma_write = snd_gf1_dma_interrupt;
gus->gf1.dma_data_pcm =
gus->gf1.dma_data_pcm_last =
gus->gf1.dma_data_synth =
gus->gf1.dma_data_synth_last = NULL;
- mutex_unlock(&gus->dma_mutex);
return 0;
}
@@ -171,7 +153,7 @@ int snd_gf1_dma_done(struct snd_gus_card * gus)
{
struct snd_gf1_dma_block *block;
- mutex_lock(&gus->dma_mutex);
+ guard(mutex)(&gus->dma_mutex);
gus->gf1.dma_shared--;
if (!gus->gf1.dma_shared) {
snd_dma_disable(gus->gf1.dma1);
@@ -188,7 +170,6 @@ int snd_gf1_dma_done(struct snd_gus_card * gus)
gus->gf1.dma_data_pcm_last =
gus->gf1.dma_data_synth_last = NULL;
}
- mutex_unlock(&gus->dma_mutex);
return 0;
}
@@ -197,8 +178,8 @@ int snd_gf1_dma_transfer_block(struct snd_gus_card * gus,
int atomic,
int synth)
{
- unsigned long flags;
struct snd_gf1_dma_block *block;
+ struct snd_gf1_dma_block *free_block = NULL;
block = kmalloc(sizeof(*block), atomic ? GFP_ATOMIC : GFP_KERNEL);
if (!block)
@@ -207,43 +188,48 @@ int snd_gf1_dma_transfer_block(struct snd_gus_card * gus,
*block = *__block;
block->next = NULL;
- snd_printdd("addr = 0x%x, buffer = 0x%lx, count = 0x%x, cmd = 0x%x\n",
- block->addr, (long) block->buffer, block->count,
- block->cmd);
-
- snd_printdd("gus->gf1.dma_data_pcm_last = 0x%lx\n",
- (long)gus->gf1.dma_data_pcm_last);
- snd_printdd("gus->gf1.dma_data_pcm = 0x%lx\n",
- (long)gus->gf1.dma_data_pcm);
-
- spin_lock_irqsave(&gus->dma_lock, flags);
- if (synth) {
- if (gus->gf1.dma_data_synth_last) {
- gus->gf1.dma_data_synth_last->next = block;
- gus->gf1.dma_data_synth_last = block;
+ dev_dbg(gus->card->dev,
+ "addr = 0x%x, buffer = 0x%lx, count = 0x%x, cmd = 0x%x\n",
+ block->addr, (long) block->buffer, block->count,
+ block->cmd);
+
+ dev_dbg(gus->card->dev,
+ "gus->gf1.dma_data_pcm_last = 0x%lx\n",
+ (long)gus->gf1.dma_data_pcm_last);
+ dev_dbg(gus->card->dev,
+ "gus->gf1.dma_data_pcm = 0x%lx\n",
+ (long)gus->gf1.dma_data_pcm);
+
+ scoped_guard(spinlock_irqsave, &gus->dma_lock) {
+ if (synth) {
+ if (gus->gf1.dma_data_synth_last) {
+ gus->gf1.dma_data_synth_last->next = block;
+ gus->gf1.dma_data_synth_last = block;
+ } else {
+ gus->gf1.dma_data_synth =
+ gus->gf1.dma_data_synth_last = block;
+ }
} else {
- gus->gf1.dma_data_synth =
- gus->gf1.dma_data_synth_last = block;
+ if (gus->gf1.dma_data_pcm_last) {
+ gus->gf1.dma_data_pcm_last->next = block;
+ gus->gf1.dma_data_pcm_last = block;
+ } else {
+ gus->gf1.dma_data_pcm =
+ gus->gf1.dma_data_pcm_last = block;
+ }
}
- } else {
- if (gus->gf1.dma_data_pcm_last) {
- gus->gf1.dma_data_pcm_last->next = block;
- gus->gf1.dma_data_pcm_last = block;
- } else {
- gus->gf1.dma_data_pcm =
- gus->gf1.dma_data_pcm_last = block;
+ if (!(gus->gf1.dma_flags & SNDRV_GF1_DMA_TRIGGER)) {
+ gus->gf1.dma_flags |= SNDRV_GF1_DMA_TRIGGER;
+ free_block = snd_gf1_dma_next_block(gus);
}
}
- if (!(gus->gf1.dma_flags & SNDRV_GF1_DMA_TRIGGER)) {
- gus->gf1.dma_flags |= SNDRV_GF1_DMA_TRIGGER;
- block = snd_gf1_dma_next_block(gus);
- spin_unlock_irqrestore(&gus->dma_lock, flags);
- if (block == NULL)
- return 0;
- snd_gf1_dma_program(gus, block->addr, block->buf_addr, block->count, (unsigned short) block->cmd);
- kfree(block);
- return 0;
+
+ if (free_block) {
+ snd_gf1_dma_program(gus, free_block->addr, free_block->buf_addr,
+ free_block->count,
+ (unsigned short)free_block->cmd);
+ kfree(free_block);
}
- spin_unlock_irqrestore(&gus->dma_lock, flags);
+
return 0;
}
generated by cgit (git 2.34.1) at 2025-12-25 15:13:10 +0000