ASoC: Intel: Fix Audio DSP usage when IOMMU is enabled.

The Intel IOMMU requires that the ACPI device is used to allocate all
DMA memory buffers. This means we need to pass the DMA device pointer into child
component devices that allocate DMA memory.

We also only set the DMA mask for the ACPI device now instead of for each
component device.

Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

diff --git a/sound/soc/intel/sst-acpi.c b/sound/soc/intel/sst-acpi.c
index 5d06eecb61986da272fcda4858db56c91d285153..18aee77f8d4a55276194542c41464feb363784d3 100644 (file)
--- a/sound/soc/intel/sst-acpi.c
+++ b/sound/soc/intel/sst-acpi.c
@@ -138,6 +138,7 @@ static int sst_acpi_probe(struct platform_device *pdev)
 
        sst_pdata = &sst_acpi->sst_pdata;
        sst_pdata->id = desc->sst_id;
+       sst_pdata->dma_dev = dev;
        sst_acpi->desc = desc;
        sst_acpi->mach = mach;
 

diff --git a/sound/soc/intel/sst-dsp-priv.h b/sound/soc/intel/sst-dsp-priv.h
index 30ca14a6a83595d5acf4e644d7f8d50827a99a98..401213455497258111dcf939c7d963fbbbeb3e37 100644 (file)
--- a/sound/soc/intel/sst-dsp-priv.h
+++ b/sound/soc/intel/sst-dsp-priv.h
@@ -228,6 +228,7 @@ struct sst_dsp {
        spinlock_t spinlock;    /* IPC locking */
        struct mutex mutex;     /* DSP FW lock */
        struct device *dev;
+       struct device *dma_dev;
        void *thread_context;
        int irq;
        u32 id;

diff --git a/sound/soc/intel/sst-dsp.c b/sound/soc/intel/sst-dsp.c
index 0c129fd85ecf8a37b3758dfc924a9e5091c9e01e..0b715b20a2d7d46b9f06189de1ee57d9aacc28ab 100644 (file)
--- a/sound/soc/intel/sst-dsp.c
+++ b/sound/soc/intel/sst-dsp.c
@@ -337,6 +337,7 @@ struct sst_dsp *sst_dsp_new(struct device *dev,
        spin_lock_init(&sst->spinlock);
        mutex_init(&sst->mutex);
        sst->dev = dev;
+       sst->dma_dev = pdata->dma_dev;
        sst->thread_context = sst_dev->thread_context;
        sst->sst_dev = sst_dev;
        sst->id = pdata->id;

diff --git a/sound/soc/intel/sst-dsp.h b/sound/soc/intel/sst-dsp.h
index 74052b59485ca1ce942444d0a3871ed8a6051672..e44423be66c459ba721249d0efe21bccdaeea4b5 100644 (file)
--- a/sound/soc/intel/sst-dsp.h
+++ b/sound/soc/intel/sst-dsp.h
@@ -169,6 +169,7 @@ struct sst_pdata {
        u32 dma_base;
        u32 dma_size;
        int dma_engine;
+       struct device *dma_dev;
 
        /* DSP */
        u32 id;

diff --git a/sound/soc/intel/sst-firmware.c b/sound/soc/intel/sst-firmware.c
index 5fed75cef64f7c0dd4f693fccd54b09b00ed3f5b..c38cfda8003c9924014bb433d67a7ba0ca4c49b4 100644 (file)
--- a/sound/soc/intel/sst-firmware.c
+++ b/sound/soc/intel/sst-firmware.c
@@ -57,14 +57,8 @@ struct sst_fw *sst_fw_new(struct sst_dsp *dsp,
        sst_fw->private = private;
        sst_fw->size = fw->size;
 
-       err = dma_coerce_mask_and_coherent(dsp->dev, DMA_BIT_MASK(32));
-       if (err < 0) {
-               kfree(sst_fw);
-               return NULL;
-       }
-
        /* allocate DMA buffer to store FW data */
-       sst_fw->dma_buf = dma_alloc_coherent(dsp->dev, sst_fw->size,
+       sst_fw->dma_buf = dma_alloc_coherent(dsp->dma_dev, sst_fw->size,
                                &sst_fw->dmable_fw_paddr, GFP_DMA | GFP_KERNEL);
        if (!sst_fw->dma_buf) {
                dev_err(dsp->dev, "error: DMA alloc failed\n");
@@ -106,7 +100,7 @@ void sst_fw_free(struct sst_fw *sst_fw)
        list_del(&sst_fw->list);
        mutex_unlock(&dsp->mutex);
 
-       dma_free_coherent(dsp->dev, sst_fw->size, sst_fw->dma_buf,
+       dma_free_coherent(dsp->dma_dev, sst_fw->size, sst_fw->dma_buf,
                        sst_fw->dmable_fw_paddr);
        kfree(sst_fw);
 }

diff --git a/sound/soc/intel/sst-haswell-dsp.c b/sound/soc/intel/sst-haswell-dsp.c
index f5ebf36af8898d8a94d4a46886bfcfe0964d0567..535f517629fd608fb7c4bd3eb79a05a67d98a518 100644 (file)
--- a/sound/soc/intel/sst-haswell-dsp.c
+++ b/sound/soc/intel/sst-haswell-dsp.c
@@ -433,7 +433,7 @@ static int hsw_init(struct sst_dsp *sst, struct sst_pdata *pdata)
        int ret = -ENODEV, i, j, region_count;
        u32 offset, size;
 
-       dev = sst->dev;
+       dev = sst->dma_dev;
 
        switch (sst->id) {
        case SST_DEV_ID_LYNX_POINT:
@@ -466,7 +466,7 @@ static int hsw_init(struct sst_dsp *sst, struct sst_pdata *pdata)
                return ret;
        }
 
-       ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(32));
+       ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(31));
        if (ret)
                return ret;
 

diff --git a/sound/soc/intel/sst-haswell-pcm.c b/sound/soc/intel/sst-haswell-pcm.c
index dc53f501c64c735ceb2d3fe9f56ca282d8b80728..ba585a75878d81eae1f2317885cff694aa421c2b 100644 (file)
--- a/sound/soc/intel/sst-haswell-pcm.c
+++ b/sound/soc/intel/sst-haswell-pcm.c
@@ -633,17 +633,16 @@ static void hsw_pcm_free(struct snd_pcm *pcm)
 static int hsw_pcm_new(struct snd_soc_pcm_runtime *rtd)
 {
        struct snd_pcm *pcm = rtd->pcm;
+       struct snd_soc_platform *platform = rtd->platform;
+       struct sst_pdata *pdata = dev_get_platdata(platform->dev);
+       struct device *dev = pdata->dma_dev;
        int ret = 0;
 
-       ret = dma_coerce_mask_and_coherent(rtd->card->dev, DMA_BIT_MASK(32));
-       if (ret)
-               return ret;
-
        if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream ||
                        pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
                ret = snd_pcm_lib_preallocate_pages_for_all(pcm,
                        SNDRV_DMA_TYPE_DEV_SG,
-                       rtd->card->dev,
+                       dev,
                        hsw_pcm_hardware.buffer_bytes_max,
                        hsw_pcm_hardware.buffer_bytes_max);
                if (ret) {