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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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![Tejun Heo](/assets/img/avatar_default.png)
percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
282 lines
7.3 KiB
C
282 lines
7.3 KiB
C
/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/dma-mapping.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/pxa2xx-lib.h>
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#include <mach/dma.h>
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#include "pxa2xx-pcm.h"
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static const struct snd_pcm_hardware pxa2xx_pcm_hardware = {
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.info = SNDRV_PCM_INFO_MMAP |
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SNDRV_PCM_INFO_MMAP_VALID |
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SNDRV_PCM_INFO_INTERLEAVED |
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SNDRV_PCM_INFO_PAUSE |
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SNDRV_PCM_INFO_RESUME,
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.formats = SNDRV_PCM_FMTBIT_S16_LE |
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SNDRV_PCM_FMTBIT_S24_LE |
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SNDRV_PCM_FMTBIT_S32_LE,
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.period_bytes_min = 32,
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.period_bytes_max = 8192 - 32,
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.periods_min = 1,
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.periods_max = PAGE_SIZE/sizeof(pxa_dma_desc),
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.buffer_bytes_max = 128 * 1024,
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.fifo_size = 32,
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};
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int __pxa2xx_pcm_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct pxa2xx_runtime_data *rtd = runtime->private_data;
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size_t totsize = params_buffer_bytes(params);
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size_t period = params_period_bytes(params);
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pxa_dma_desc *dma_desc;
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dma_addr_t dma_buff_phys, next_desc_phys;
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snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
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runtime->dma_bytes = totsize;
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dma_desc = rtd->dma_desc_array;
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next_desc_phys = rtd->dma_desc_array_phys;
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dma_buff_phys = runtime->dma_addr;
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do {
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next_desc_phys += sizeof(pxa_dma_desc);
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dma_desc->ddadr = next_desc_phys;
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
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dma_desc->dsadr = dma_buff_phys;
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dma_desc->dtadr = rtd->params->dev_addr;
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} else {
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dma_desc->dsadr = rtd->params->dev_addr;
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dma_desc->dtadr = dma_buff_phys;
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}
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if (period > totsize)
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period = totsize;
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dma_desc->dcmd = rtd->params->dcmd | period | DCMD_ENDIRQEN;
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dma_desc++;
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dma_buff_phys += period;
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} while (totsize -= period);
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dma_desc[-1].ddadr = rtd->dma_desc_array_phys;
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return 0;
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}
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EXPORT_SYMBOL(__pxa2xx_pcm_hw_params);
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int __pxa2xx_pcm_hw_free(struct snd_pcm_substream *substream)
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{
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struct pxa2xx_runtime_data *rtd = substream->runtime->private_data;
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if (rtd && rtd->params && rtd->params->drcmr)
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*rtd->params->drcmr = 0;
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snd_pcm_set_runtime_buffer(substream, NULL);
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return 0;
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}
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EXPORT_SYMBOL(__pxa2xx_pcm_hw_free);
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int pxa2xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
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{
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struct pxa2xx_runtime_data *prtd = substream->runtime->private_data;
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int ret = 0;
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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DDADR(prtd->dma_ch) = prtd->dma_desc_array_phys;
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DCSR(prtd->dma_ch) = DCSR_RUN;
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break;
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case SNDRV_PCM_TRIGGER_STOP:
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case SNDRV_PCM_TRIGGER_SUSPEND:
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case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
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DCSR(prtd->dma_ch) &= ~DCSR_RUN;
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break;
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case SNDRV_PCM_TRIGGER_RESUME:
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DCSR(prtd->dma_ch) |= DCSR_RUN;
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break;
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case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
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DDADR(prtd->dma_ch) = prtd->dma_desc_array_phys;
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DCSR(prtd->dma_ch) |= DCSR_RUN;
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break;
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default:
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ret = -EINVAL;
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}
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return ret;
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}
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EXPORT_SYMBOL(pxa2xx_pcm_trigger);
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snd_pcm_uframes_t
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pxa2xx_pcm_pointer(struct snd_pcm_substream *substream)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct pxa2xx_runtime_data *prtd = runtime->private_data;
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dma_addr_t ptr = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
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DSADR(prtd->dma_ch) : DTADR(prtd->dma_ch);
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snd_pcm_uframes_t x = bytes_to_frames(runtime, ptr - runtime->dma_addr);
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if (x == runtime->buffer_size)
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x = 0;
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return x;
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}
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EXPORT_SYMBOL(pxa2xx_pcm_pointer);
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int __pxa2xx_pcm_prepare(struct snd_pcm_substream *substream)
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{
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struct pxa2xx_runtime_data *prtd = substream->runtime->private_data;
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if (!prtd || !prtd->params)
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return 0;
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DCSR(prtd->dma_ch) &= ~DCSR_RUN;
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DCSR(prtd->dma_ch) = 0;
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DCMD(prtd->dma_ch) = 0;
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*prtd->params->drcmr = prtd->dma_ch | DRCMR_MAPVLD;
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return 0;
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}
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EXPORT_SYMBOL(__pxa2xx_pcm_prepare);
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void pxa2xx_pcm_dma_irq(int dma_ch, void *dev_id)
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{
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struct snd_pcm_substream *substream = dev_id;
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struct pxa2xx_runtime_data *rtd = substream->runtime->private_data;
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int dcsr;
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dcsr = DCSR(dma_ch);
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DCSR(dma_ch) = dcsr & ~DCSR_STOPIRQEN;
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if (dcsr & DCSR_ENDINTR) {
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snd_pcm_period_elapsed(substream);
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} else {
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printk(KERN_ERR "%s: DMA error on channel %d (DCSR=%#x)\n",
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rtd->params->name, dma_ch, dcsr);
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snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
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}
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}
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EXPORT_SYMBOL(pxa2xx_pcm_dma_irq);
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int __pxa2xx_pcm_open(struct snd_pcm_substream *substream)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct pxa2xx_runtime_data *rtd;
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int ret;
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runtime->hw = pxa2xx_pcm_hardware;
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/*
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* For mysterious reasons (and despite what the manual says)
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* playback samples are lost if the DMA count is not a multiple
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* of the DMA burst size. Let's add a rule to enforce that.
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*/
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ret = snd_pcm_hw_constraint_step(runtime, 0,
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SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 32);
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if (ret)
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goto out;
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ret = snd_pcm_hw_constraint_step(runtime, 0,
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SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 32);
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if (ret)
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goto out;
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ret = snd_pcm_hw_constraint_integer(runtime,
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SNDRV_PCM_HW_PARAM_PERIODS);
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if (ret < 0)
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goto out;
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ret = -ENOMEM;
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rtd = kzalloc(sizeof(*rtd), GFP_KERNEL);
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if (!rtd)
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goto out;
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rtd->dma_desc_array =
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dma_alloc_writecombine(substream->pcm->card->dev, PAGE_SIZE,
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&rtd->dma_desc_array_phys, GFP_KERNEL);
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if (!rtd->dma_desc_array)
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goto err1;
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rtd->dma_ch = -1;
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runtime->private_data = rtd;
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return 0;
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err1:
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kfree(rtd);
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out:
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return ret;
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}
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EXPORT_SYMBOL(__pxa2xx_pcm_open);
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int __pxa2xx_pcm_close(struct snd_pcm_substream *substream)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct pxa2xx_runtime_data *rtd = runtime->private_data;
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dma_free_writecombine(substream->pcm->card->dev, PAGE_SIZE,
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rtd->dma_desc_array, rtd->dma_desc_array_phys);
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kfree(rtd);
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return 0;
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}
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EXPORT_SYMBOL(__pxa2xx_pcm_close);
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int pxa2xx_pcm_mmap(struct snd_pcm_substream *substream,
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struct vm_area_struct *vma)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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return dma_mmap_writecombine(substream->pcm->card->dev, vma,
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runtime->dma_area,
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runtime->dma_addr,
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runtime->dma_bytes);
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}
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EXPORT_SYMBOL(pxa2xx_pcm_mmap);
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int pxa2xx_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream)
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{
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struct snd_pcm_substream *substream = pcm->streams[stream].substream;
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struct snd_dma_buffer *buf = &substream->dma_buffer;
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size_t size = pxa2xx_pcm_hardware.buffer_bytes_max;
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buf->dev.type = SNDRV_DMA_TYPE_DEV;
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buf->dev.dev = pcm->card->dev;
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buf->private_data = NULL;
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buf->area = dma_alloc_writecombine(pcm->card->dev, size,
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&buf->addr, GFP_KERNEL);
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if (!buf->area)
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return -ENOMEM;
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buf->bytes = size;
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return 0;
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}
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EXPORT_SYMBOL(pxa2xx_pcm_preallocate_dma_buffer);
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void pxa2xx_pcm_free_dma_buffers(struct snd_pcm *pcm)
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{
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struct snd_pcm_substream *substream;
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struct snd_dma_buffer *buf;
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int stream;
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for (stream = 0; stream < 2; stream++) {
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substream = pcm->streams[stream].substream;
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if (!substream)
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continue;
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buf = &substream->dma_buffer;
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if (!buf->area)
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continue;
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dma_free_writecombine(pcm->card->dev, buf->bytes,
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buf->area, buf->addr);
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buf->area = NULL;
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}
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}
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EXPORT_SYMBOL(pxa2xx_pcm_free_dma_buffers);
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MODULE_AUTHOR("Nicolas Pitre");
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MODULE_DESCRIPTION("Intel PXA2xx sound library");
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MODULE_LICENSE("GPL");
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