From 1656fa6ea2583d9779c10051b3b37d664c8899e3 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Thu, 15 Jul 2021 09:58:51 +0200 Subject: [PATCH] ALSA: ca0106: Allocate resources with device-managed APIs This patch converts the resource management in PCI ca0106 driver with devres as a clean up. Each manual resource management is converted with the corresponding devres helper, and the card object release is managed now via card->private_free instead of a lowlevel snd_device. This should give no user-visible functional changes. Link: https://lore.kernel.org/r/20210715075941.23332-30-tiwai@suse.de Signed-off-by: Takashi Iwai --- sound/pci/ca0106/ca0106.h | 3 +- sound/pci/ca0106/ca0106_main.c | 114 +++++++++++------------------------------ 2 files changed, 30 insertions(+), 87 deletions(-) diff --git a/sound/pci/ca0106/ca0106.h b/sound/pci/ca0106/ca0106.h index 62a22ca..f246e60 100644 --- a/sound/pci/ca0106/ca0106.h +++ b/sound/pci/ca0106/ca0106.h @@ -667,7 +667,6 @@ struct snd_ca0106 { struct pci_dev *pci; unsigned long port; - struct resource *res_port; int irq; unsigned int serial; /* serial number */ @@ -688,7 +687,7 @@ struct snd_ca0106 { u8 i2c_capture_volume[4][2]; int capture_mic_line_in; - struct snd_dma_buffer buffer; + struct snd_dma_buffer *buffer; struct snd_ca_midi midi; struct snd_ca_midi midi2; diff --git a/sound/pci/ca0106/ca0106_main.c b/sound/pci/ca0106/ca0106_main.c index 9977871..36fb150 100644 --- a/sound/pci/ca0106/ca0106_main.c +++ b/sound/pci/ca0106/ca0106_main.c @@ -718,7 +718,7 @@ static int snd_ca0106_pcm_prepare_playback(struct snd_pcm_substream *substream) struct snd_pcm_runtime *runtime = substream->runtime; struct snd_ca0106_pcm *epcm = runtime->private_data; int channel = epcm->channel_id; - u32 *table_base = (u32 *)(emu->buffer.area+(8*16*channel)); + u32 *table_base = (u32 *)(emu->buffer->area+(8*16*channel)); u32 period_size_bytes = frames_to_bytes(runtime, runtime->period_size); u32 hcfg_mask = HCFG_PLAYBACK_S32_LE; u32 hcfg_set = 0x00000000; @@ -746,7 +746,7 @@ static int snd_ca0106_pcm_prepare_playback(struct snd_pcm_substream *substream) runtime->dma_addr, runtime->dma_area, table_base); dev_dbg(emu->card->dev, "dma_addr=%x, dma_area=%p, dma_bytes(size)=%x\n", - emu->buffer.addr, emu->buffer.area, emu->buffer.bytes); + emu->buffer->addr, emu->buffer->area, emu->buffer->bytes); #endif /* debug */ /* Rate can be set per channel. */ /* reg40 control host to fifo */ @@ -796,13 +796,13 @@ static int snd_ca0106_pcm_prepare_playback(struct snd_pcm_substream *substream) reg71 = (reg71 & ~reg71_mask) | reg71_set; snd_ca0106_ptr_write(emu, 0x71, 0, reg71); - /* FIXME: Check emu->buffer.size before actually writing to it. */ + /* FIXME: Check emu->buffer->size before actually writing to it. */ for(i=0; i < runtime->periods; i++) { table_base[i*2] = runtime->dma_addr + (i * period_size_bytes); table_base[i*2+1] = period_size_bytes << 16; } - snd_ca0106_ptr_write(emu, PLAYBACK_LIST_ADDR, channel, emu->buffer.addr+(8*16*channel)); + snd_ca0106_ptr_write(emu, PLAYBACK_LIST_ADDR, channel, emu->buffer->addr+(8*16*channel)); snd_ca0106_ptr_write(emu, PLAYBACK_LIST_SIZE, channel, (runtime->periods - 1) << 19); snd_ca0106_ptr_write(emu, PLAYBACK_LIST_PTR, channel, 0); snd_ca0106_ptr_write(emu, PLAYBACK_DMA_ADDR, channel, runtime->dma_addr); @@ -853,7 +853,7 @@ static int snd_ca0106_pcm_prepare_capture(struct snd_pcm_substream *substream) runtime->dma_addr, runtime->dma_area, table_base); dev_dbg(emu->card->dev, "dma_addr=%x, dma_area=%p, dma_bytes(size)=%x\n", - emu->buffer.addr, emu->buffer.area, emu->buffer.bytes); + emu->buffer->addr, emu->buffer->area, emu->buffer->bytes); #endif /* debug */ /* reg71 controls ADC rate. */ switch (runtime->rate) { @@ -1183,32 +1183,11 @@ static int snd_ca0106_ac97(struct snd_ca0106 *chip) static void ca0106_stop_chip(struct snd_ca0106 *chip); -static int snd_ca0106_free(struct snd_ca0106 *chip) +static void snd_ca0106_free(struct snd_card *card) { - if (chip->res_port != NULL) { - /* avoid access to already used hardware */ - ca0106_stop_chip(chip); - } - if (chip->irq >= 0) - free_irq(chip->irq, chip); - // release the data -#if 1 - if (chip->buffer.area) - snd_dma_free_pages(&chip->buffer); -#endif - - // release the i/o port - release_and_free_resource(chip->res_port); - - pci_disable_device(chip->pci); - kfree(chip); - return 0; -} + struct snd_ca0106 *chip = card->private_data; -static int snd_ca0106_dev_free(struct snd_device *device) -{ - struct snd_ca0106 *chip = device->device_data; - return snd_ca0106_free(chip); + ca0106_stop_chip(chip); } static irqreturn_t snd_ca0106_interrupt(int irq, void *dev_id) @@ -1594,50 +1573,33 @@ static void ca0106_stop_chip(struct snd_ca0106 *chip) } static int snd_ca0106_create(int dev, struct snd_card *card, - struct pci_dev *pci, - struct snd_ca0106 **rchip) + struct pci_dev *pci) { - struct snd_ca0106 *chip; + struct snd_ca0106 *chip = card->private_data; const struct snd_ca0106_details *c; int err; - static const struct snd_device_ops ops = { - .dev_free = snd_ca0106_dev_free, - }; - - *rchip = NULL; - err = pci_enable_device(pci); + err = pcim_enable_device(pci); if (err < 0) return err; if (dma_set_mask_and_coherent(&pci->dev, DMA_BIT_MASK(32))) { dev_err(card->dev, "error to set 32bit mask DMA\n"); - pci_disable_device(pci); return -ENXIO; } - chip = kzalloc(sizeof(*chip), GFP_KERNEL); - if (chip == NULL) { - pci_disable_device(pci); - return -ENOMEM; - } - chip->card = card; chip->pci = pci; chip->irq = -1; spin_lock_init(&chip->emu_lock); + err = pci_request_regions(pci, "snd_ca0106"); + if (err < 0) + return err; chip->port = pci_resource_start(pci, 0); - chip->res_port = request_region(chip->port, 0x20, "snd_ca0106"); - if (!chip->res_port) { - snd_ca0106_free(chip); - dev_err(card->dev, "cannot allocate the port\n"); - return -EBUSY; - } - if (request_irq(pci->irq, snd_ca0106_interrupt, - IRQF_SHARED, KBUILD_MODNAME, chip)) { - snd_ca0106_free(chip); + if (devm_request_irq(&pci->dev, pci->irq, snd_ca0106_interrupt, + IRQF_SHARED, KBUILD_MODNAME, chip)) { dev_err(card->dev, "cannot grab irq\n"); return -EBUSY; } @@ -1645,11 +1607,9 @@ static int snd_ca0106_create(int dev, struct snd_card *card, card->sync_irq = chip->irq; /* This stores the periods table. */ - if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, &pci->dev, - 1024, &chip->buffer) < 0) { - snd_ca0106_free(chip); + chip->buffer = snd_devm_alloc_pages(&pci->dev, SNDRV_DMA_TYPE_DEV, 1024); + if (!chip->buffer) return -ENOMEM; - } pci_set_master(pci); /* read serial */ @@ -1678,13 +1638,6 @@ static int snd_ca0106_create(int dev, struct snd_card *card, c->name, chip->port, chip->irq); ca0106_init_chip(chip, 0); - - err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops); - if (err < 0) { - snd_ca0106_free(chip); - return err; - } - *rchip = chip; return 0; } @@ -1787,36 +1740,37 @@ static int snd_ca0106_probe(struct pci_dev *pci, return -ENOENT; } - err = snd_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE, - 0, &card); + err = snd_devm_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE, + sizeof(*chip), &card); if (err < 0) return err; + chip = card->private_data; - err = snd_ca0106_create(dev, card, pci, &chip); + err = snd_ca0106_create(dev, card, pci); if (err < 0) - goto error; - card->private_data = chip; + return err; + card->private_free = snd_ca0106_free; for (i = 0; i < 4; i++) { err = snd_ca0106_pcm(chip, i); if (err < 0) - goto error; + return err; } if (chip->details->ac97 == 1) { /* The SB0410 and SB0413 do not have an AC97 chip. */ err = snd_ca0106_ac97(chip); if (err < 0) - goto error; + return err; } err = snd_ca0106_mixer(chip); if (err < 0) - goto error; + return err; dev_dbg(card->dev, "probe for MIDI channel A ..."); err = snd_ca0106_midi(chip, CA0106_MIDI_CHAN_A); if (err < 0) - goto error; + return err; dev_dbg(card->dev, " done.\n"); #ifdef CONFIG_SND_PROC_FS @@ -1825,20 +1779,11 @@ static int snd_ca0106_probe(struct pci_dev *pci, err = snd_card_register(card); if (err < 0) - goto error; + return err; pci_set_drvdata(pci, card); dev++; return 0; - - error: - snd_card_free(card); - return err; -} - -static void snd_ca0106_remove(struct pci_dev *pci) -{ - snd_card_free(pci_get_drvdata(pci)); } #ifdef CONFIG_PM_SLEEP @@ -1894,7 +1839,6 @@ static struct pci_driver ca0106_driver = { .name = KBUILD_MODNAME, .id_table = snd_ca0106_ids, .probe = snd_ca0106_probe, - .remove = snd_ca0106_remove, .driver = { .pm = SND_CA0106_PM_OPS, }, -- 2.7.4