From dba8b46992c55946d3b092934f581a343403118f Mon Sep 17 00:00:00 2001 From: Clemens Ladisch Date: Tue, 13 Sep 2011 11:24:41 +0200 Subject: ALSA: mpu401: clean up interrupt specification The semantics of snd_mpu401_uart_new()'s interrupt parameters are somewhat counterintuitive: To prevent the function from allocating its own interrupt, either the irq number must be invalid, or the irq_flags parameter must be zero. At the same time, the irq parameter being invalid specifies that the mpu401 code has to work without an interrupt allocated by the caller. This implies that, if there is an interrupt and it is allocated by the caller, the irq parameter must be set to a valid-looking number which then isn't actually used. With the removal of IRQF_DISABLED, zero becomes a valid irq_flags value, which forces us to handle the parameters differently. This patch introduces a new flag MPU401_INFO_IRQ_HOOK for when the device interrupt is handled by the caller, and makes the allocation of the interrupt to depend only on the irq parameter. As suggested by Takashi, the irq_flags parameter was dropped because, when used, it had the constant value IRQF_DISABLED. Signed-off-by: Clemens Ladisch Signed-off-by: Takashi Iwai --- sound/drivers/mpu401/mpu401.c | 3 +-- sound/drivers/mpu401/mpu401_uart.c | 20 ++++++++++---------- 2 files changed, 11 insertions(+), 12 deletions(-) (limited to 'sound/drivers') diff --git a/sound/drivers/mpu401/mpu401.c b/sound/drivers/mpu401/mpu401.c index 149d05a8202d..1c02852aceea 100644 --- a/sound/drivers/mpu401/mpu401.c +++ b/sound/drivers/mpu401/mpu401.c @@ -86,8 +86,7 @@ static int snd_mpu401_create(int dev, struct snd_card **rcard) } err = snd_mpu401_uart_new(card, 0, MPU401_HW_MPU401, port[dev], 0, - irq[dev], irq[dev] >= 0 ? IRQF_DISABLED : 0, - NULL); + irq[dev], NULL); if (err < 0) { printk(KERN_ERR "MPU401 not detected at 0x%lx\n", port[dev]); goto _err; diff --git a/sound/drivers/mpu401/mpu401_uart.c b/sound/drivers/mpu401/mpu401_uart.c index 2af09996a3d0..9d01c181feca 100644 --- a/sound/drivers/mpu401/mpu401_uart.c +++ b/sound/drivers/mpu401/mpu401_uart.c @@ -3,7 +3,7 @@ * Routines for control of MPU-401 in UART mode * * MPU-401 supports UART mode which is not capable generate transmit - * interrupts thus output is done via polling. Also, if irq < 0, then + * interrupts thus output is done via polling. Without interrupt, * input is done also via polling. Do not expect good performance. * * @@ -374,7 +374,7 @@ snd_mpu401_uart_input_trigger(struct snd_rawmidi_substream *substream, int up) /* first time - flush FIFO */ while (max-- > 0) mpu->read(mpu, MPU401D(mpu)); - if (mpu->irq < 0) + if (mpu->info_flags & MPU401_INFO_USE_TIMER) snd_mpu401_uart_add_timer(mpu, 1); } @@ -383,7 +383,7 @@ snd_mpu401_uart_input_trigger(struct snd_rawmidi_substream *substream, int up) snd_mpu401_uart_input_read(mpu); spin_unlock_irqrestore(&mpu->input_lock, flags); } else { - if (mpu->irq < 0) + if (mpu->info_flags & MPU401_INFO_USE_TIMER) snd_mpu401_uart_remove_timer(mpu, 1); clear_bit(MPU401_MODE_BIT_INPUT_TRIGGER, &mpu->mode); } @@ -496,7 +496,7 @@ static struct snd_rawmidi_ops snd_mpu401_uart_input = static void snd_mpu401_uart_free(struct snd_rawmidi *rmidi) { struct snd_mpu401 *mpu = rmidi->private_data; - if (mpu->irq_flags && mpu->irq >= 0) + if (mpu->irq >= 0) free_irq(mpu->irq, (void *) mpu); release_and_free_resource(mpu->res); kfree(mpu); @@ -509,8 +509,7 @@ static void snd_mpu401_uart_free(struct snd_rawmidi *rmidi) * @hardware: the hardware type, MPU401_HW_XXXX * @port: the base address of MPU401 port * @info_flags: bitflags MPU401_INFO_XXX - * @irq: the irq number, -1 if no interrupt for mpu - * @irq_flags: the irq request flags (SA_XXX), 0 if irq was already reserved. + * @irq: the ISA irq number, -1 if not to be allocated * @rrawmidi: the pointer to store the new rawmidi instance * * Creates a new MPU-401 instance. @@ -525,7 +524,7 @@ int snd_mpu401_uart_new(struct snd_card *card, int device, unsigned short hardware, unsigned long port, unsigned int info_flags, - int irq, int irq_flags, + int irq, struct snd_rawmidi ** rrawmidi) { struct snd_mpu401 *mpu; @@ -577,8 +576,8 @@ int snd_mpu401_uart_new(struct snd_card *card, int device, mpu->cport = port + 2; else mpu->cport = port + 1; - if (irq >= 0 && irq_flags) { - if (request_irq(irq, snd_mpu401_uart_interrupt, irq_flags, + if (irq >= 0) { + if (request_irq(irq, snd_mpu401_uart_interrupt, IRQF_DISABLED, "MPU401 UART", (void *) mpu)) { snd_printk(KERN_ERR "mpu401_uart: " "unable to grab IRQ %d\n", irq); @@ -586,9 +585,10 @@ int snd_mpu401_uart_new(struct snd_card *card, int device, return -EBUSY; } } + if (irq < 0 && !(info_flags & MPU401_INFO_IRQ_HOOK)) + info_flags |= MPU401_INFO_USE_TIMER; mpu->info_flags = info_flags; mpu->irq = irq; - mpu->irq_flags = irq_flags; if (card->shortname[0]) snprintf(rmidi->name, sizeof(rmidi->name), "%s MIDI", card->shortname); -- cgit v1.2.3 From 6b69a0e520a0dc6579901098d0810bcd2e1ea60b Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Sat, 24 Sep 2011 12:16:29 +0200 Subject: ALSA: aloop - Use vmalloc buffer snd-aloop driver is virtual and has no need for allocating contiguous pages. It'll be more system-friendly to use vmalloc buffers. Tested-by: Pierre-Louis Bossart Signed-off-by: Takashi Iwai --- sound/drivers/aloop.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) (limited to 'sound/drivers') diff --git a/sound/drivers/aloop.c b/sound/drivers/aloop.c index a0da7755fcea..4067f1548949 100644 --- a/sound/drivers/aloop.c +++ b/sound/drivers/aloop.c @@ -575,7 +575,8 @@ static void loopback_runtime_free(struct snd_pcm_runtime *runtime) static int loopback_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params) { - return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params)); + return snd_pcm_lib_alloc_vmalloc_buffer(substream, + params_buffer_bytes(params)); } static int loopback_hw_free(struct snd_pcm_substream *substream) @@ -587,7 +588,7 @@ static int loopback_hw_free(struct snd_pcm_substream *substream) mutex_lock(&dpcm->loopback->cable_lock); cable->valid &= ~(1 << substream->stream); mutex_unlock(&dpcm->loopback->cable_lock); - return snd_pcm_lib_free_pages(substream); + return snd_pcm_lib_free_vmalloc_buffer(substream); } static unsigned int get_cable_index(struct snd_pcm_substream *substream) @@ -740,6 +741,8 @@ static struct snd_pcm_ops loopback_playback_ops = { .prepare = loopback_prepare, .trigger = loopback_trigger, .pointer = loopback_pointer, + .page = snd_pcm_lib_get_vmalloc_page, + .mmap = snd_pcm_lib_mmap_vmalloc, }; static struct snd_pcm_ops loopback_capture_ops = { @@ -751,6 +754,8 @@ static struct snd_pcm_ops loopback_capture_ops = { .prepare = loopback_prepare, .trigger = loopback_trigger, .pointer = loopback_pointer, + .page = snd_pcm_lib_get_vmalloc_page, + .mmap = snd_pcm_lib_mmap_vmalloc, }; static int __devinit loopback_pcm_new(struct loopback *loopback, @@ -771,10 +776,6 @@ static int __devinit loopback_pcm_new(struct loopback *loopback, strcpy(pcm->name, "Loopback PCM"); loopback->pcm[device] = pcm; - - snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS, - snd_dma_continuous_data(GFP_KERNEL), - 0, 2 * 1024 * 1024); return 0; } -- cgit v1.2.3