* [PATCH 28/51] DMA-API: sound: fix dma mask handling in a lot of drivers
From: Russell King @ 2013-09-19 21:53 UTC (permalink / raw)
To: alsa-devel, b43-dev, devel, devicetree, dri-devel, e1000-devel,
linux-arm-kernel, linux-crypto, linux-doc, linux-fbdev, linux-ide,
linux-media, linux-mmc, linux-nvme, linux-omap, linuxppc-dev,
linux-samsung-soc, linux-scsi, linux-tegra, linux-usb,
linux-wireless, netdev, Solarflare linux maintainers,
uclinux-dist-devel
Cc: Kukjin Kim, Eric Miao, Takashi Iwai, Liam Girdwood,
Haojian Zhuang, Jaroslav Kysela, Peter Ujfalusi, Sangbeom Kim,
Mark Brown, Ben Dooks, Timur Tabi, Jarkko Nikula
In-Reply-To: <20130919212235.GD12758@n2100.arm.linux.org.uk>
This code sequence is unsafe in modules:
static u64 mask = DMA_BIT_MASK(something);
...
if (!dev->dma_mask)
dev->dma_mask = &mask;
as if a module is reloaded, the mask will be pointing at the original
module's mask address, and this can lead to oopses. Moreover, they
all follow this with:
if (!dev->coherent_dma_mask)
dev->coherent_dma_mask = mask;
where 'mask' is the same value as the statically defined mask, and this
bypasses the architecture's check on whether the DMA mask is possible.
Fix these issues by using the new dma_coerce_coherent_and_mask()
function.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
sound/arm/pxa2xx-pcm.c | 9 +++------
sound/soc/atmel/atmel-pcm.c | 11 ++++-------
sound/soc/blackfin/bf5xx-ac97-pcm.c | 11 ++++-------
sound/soc/blackfin/bf5xx-i2s-pcm.c | 10 ++++------
sound/soc/davinci/davinci-pcm.c | 9 +++------
sound/soc/fsl/fsl_dma.c | 9 +++------
sound/soc/fsl/mpc5200_dma.c | 10 ++++------
sound/soc/jz4740/jz4740-pcm.c | 12 ++++--------
sound/soc/kirkwood/kirkwood-dma.c | 9 +++------
sound/soc/nuc900/nuc900-pcm.c | 9 ++++-----
sound/soc/omap/omap-pcm.c | 11 ++++-------
sound/soc/pxa/pxa2xx-pcm.c | 11 ++++-------
sound/soc/s6000/s6000-pcm.c | 9 +++------
sound/soc/samsung/dma.c | 11 ++++-------
sound/soc/samsung/idma.c | 11 ++++-------
15 files changed, 55 insertions(+), 97 deletions(-)
diff --git a/sound/arm/pxa2xx-pcm.c b/sound/arm/pxa2xx-pcm.c
index 69a2455..fb3b76f 100644
--- a/sound/arm/pxa2xx-pcm.c
+++ b/sound/arm/pxa2xx-pcm.c
@@ -83,8 +83,6 @@ static struct snd_pcm_ops pxa2xx_pcm_ops = {
.mmap = pxa2xx_pcm_mmap,
};
-static u64 pxa2xx_pcm_dmamask = 0xffffffff;
-
int pxa2xx_pcm_new(struct snd_card *card, struct pxa2xx_pcm_client *client,
struct snd_pcm **rpcm)
{
@@ -100,10 +98,9 @@ int pxa2xx_pcm_new(struct snd_card *card, struct pxa2xx_pcm_client *client,
pcm->private_data = client;
pcm->private_free = pxa2xx_pcm_free_dma_buffers;
- if (!card->dev->dma_mask)
- card->dev->dma_mask = &pxa2xx_pcm_dmamask;
- if (!card->dev->coherent_dma_mask)
- card->dev->coherent_dma_mask = 0xffffffff;
+ ret = dma_coerce_mask_and_coherent_mask(card->dev, DMA_BIT_MASK(32));
+ if (ret)
+ goto out;
if (play) {
int stream = SNDRV_PCM_STREAM_PLAYBACK;
diff --git a/sound/soc/atmel/atmel-pcm.c b/sound/soc/atmel/atmel-pcm.c
index 3109db7..fbb87e3 100644
--- a/sound/soc/atmel/atmel-pcm.c
+++ b/sound/soc/atmel/atmel-pcm.c
@@ -68,18 +68,15 @@ int atmel_pcm_mmap(struct snd_pcm_substream *substream,
}
EXPORT_SYMBOL_GPL(atmel_pcm_mmap);
-static u64 atmel_pcm_dmamask = DMA_BIT_MASK(32);
-
int atmel_pcm_new(struct snd_soc_pcm_runtime *rtd)
{
struct snd_card *card = rtd->card->snd_card;
struct snd_pcm *pcm = rtd->pcm;
- int ret = 0;
+ int ret;
- if (!card->dev->dma_mask)
- card->dev->dma_mask = &atmel_pcm_dmamask;
- if (!card->dev->coherent_dma_mask)
- card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
+ ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
+ if (ret)
+ return ret;
if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
pr_debug("atmel-pcm: allocating PCM playback DMA buffer\n");
diff --git a/sound/soc/blackfin/bf5xx-ac97-pcm.c b/sound/soc/blackfin/bf5xx-ac97-pcm.c
index 53f8408..1d4c676 100644
--- a/sound/soc/blackfin/bf5xx-ac97-pcm.c
+++ b/sound/soc/blackfin/bf5xx-ac97-pcm.c
@@ -415,19 +415,16 @@ static void bf5xx_pcm_free_dma_buffers(struct snd_pcm *pcm)
}
}
-static u64 bf5xx_pcm_dmamask = DMA_BIT_MASK(32);
-
static int bf5xx_pcm_ac97_new(struct snd_soc_pcm_runtime *rtd)
{
struct snd_card *card = rtd->card->snd_card;
struct snd_pcm *pcm = rtd->pcm;
- int ret = 0;
+ int ret;
pr_debug("%s enter\n", __func__);
- if (!card->dev->dma_mask)
- card->dev->dma_mask = &bf5xx_pcm_dmamask;
- if (!card->dev->coherent_dma_mask)
- card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
+ ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
+ if (ret)
+ return ret;
if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
ret = bf5xx_pcm_preallocate_dma_buffer(pcm,
diff --git a/sound/soc/blackfin/bf5xx-i2s-pcm.c b/sound/soc/blackfin/bf5xx-i2s-pcm.c
index 9cb4a80..2a5b434 100644
--- a/sound/soc/blackfin/bf5xx-i2s-pcm.c
+++ b/sound/soc/blackfin/bf5xx-i2s-pcm.c
@@ -323,18 +323,16 @@ static struct snd_pcm_ops bf5xx_pcm_i2s_ops = {
.silence = bf5xx_pcm_silence,
};
-static u64 bf5xx_pcm_dmamask = DMA_BIT_MASK(32);
-
static int bf5xx_pcm_i2s_new(struct snd_soc_pcm_runtime *rtd)
{
struct snd_card *card = rtd->card->snd_card;
size_t size = bf5xx_pcm_hardware.buffer_bytes_max;
+ int ret;
pr_debug("%s enter\n", __func__);
- if (!card->dev->dma_mask)
- card->dev->dma_mask = &bf5xx_pcm_dmamask;
- if (!card->dev->coherent_dma_mask)
- card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
+ ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
+ if (ret)
+ return ret;
return snd_pcm_lib_preallocate_pages_for_all(rtd->pcm,
SNDRV_DMA_TYPE_DEV, card->dev, size, size);
diff --git a/sound/soc/davinci/davinci-pcm.c b/sound/soc/davinci/davinci-pcm.c
index 8460edc..84a63c6 100644
--- a/sound/soc/davinci/davinci-pcm.c
+++ b/sound/soc/davinci/davinci-pcm.c
@@ -844,18 +844,15 @@ static void davinci_pcm_free(struct snd_pcm *pcm)
}
}
-static u64 davinci_pcm_dmamask = DMA_BIT_MASK(32);
-
static int davinci_pcm_new(struct snd_soc_pcm_runtime *rtd)
{
struct snd_card *card = rtd->card->snd_card;
struct snd_pcm *pcm = rtd->pcm;
int ret;
- if (!card->dev->dma_mask)
- card->dev->dma_mask = &davinci_pcm_dmamask;
- if (!card->dev->coherent_dma_mask)
- card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
+ ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
+ if (ret)
+ return ret;
if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
ret = davinci_pcm_preallocate_dma_buffer(pcm,
diff --git a/sound/soc/fsl/fsl_dma.c b/sound/soc/fsl/fsl_dma.c
index 9cc5c1f..f73c7ef 100644
--- a/sound/soc/fsl/fsl_dma.c
+++ b/sound/soc/fsl/fsl_dma.c
@@ -298,14 +298,11 @@ static int fsl_dma_new(struct snd_soc_pcm_runtime *rtd)
{
struct snd_card *card = rtd->card->snd_card;
struct snd_pcm *pcm = rtd->pcm;
- static u64 fsl_dma_dmamask = DMA_BIT_MASK(36);
int ret;
- if (!card->dev->dma_mask)
- card->dev->dma_mask = &fsl_dma_dmamask;
-
- if (!card->dev->coherent_dma_mask)
- card->dev->coherent_dma_mask = fsl_dma_dmamask;
+ ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(36));
+ if (ret)
+ return ret;
/* Some codecs have separate DAIs for playback and capture, so we
* should allocate a DMA buffer only for the streams that are valid.
diff --git a/sound/soc/fsl/mpc5200_dma.c b/sound/soc/fsl/mpc5200_dma.c
index 2a847ca..8fcf224 100644
--- a/sound/soc/fsl/mpc5200_dma.c
+++ b/sound/soc/fsl/mpc5200_dma.c
@@ -299,7 +299,6 @@ static struct snd_pcm_ops psc_dma_ops = {
.hw_params = psc_dma_hw_params,
};
-static u64 psc_dma_dmamask = DMA_BIT_MASK(32);
static int psc_dma_new(struct snd_soc_pcm_runtime *rtd)
{
struct snd_card *card = rtd->card->snd_card;
@@ -307,15 +306,14 @@ static int psc_dma_new(struct snd_soc_pcm_runtime *rtd)
struct snd_pcm *pcm = rtd->pcm;
struct psc_dma *psc_dma = snd_soc_dai_get_drvdata(rtd->cpu_dai);
size_t size = psc_dma_hardware.buffer_bytes_max;
- int rc = 0;
+ int rc;
dev_dbg(rtd->platform->dev, "psc_dma_new(card=%p, dai=%p, pcm=%p)\n",
card, dai, pcm);
- if (!card->dev->dma_mask)
- card->dev->dma_mask = &psc_dma_dmamask;
- if (!card->dev->coherent_dma_mask)
- card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
+ rc = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
+ if (rc)
+ return rc;
if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
rc = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, pcm->card->dev,
diff --git a/sound/soc/jz4740/jz4740-pcm.c b/sound/soc/jz4740/jz4740-pcm.c
index 7100592..1d7ef28 100644
--- a/sound/soc/jz4740/jz4740-pcm.c
+++ b/sound/soc/jz4740/jz4740-pcm.c
@@ -297,19 +297,15 @@ static void jz4740_pcm_free(struct snd_pcm *pcm)
}
}
-static u64 jz4740_pcm_dmamask = DMA_BIT_MASK(32);
-
static int jz4740_pcm_new(struct snd_soc_pcm_runtime *rtd)
{
struct snd_card *card = rtd->card->snd_card;
struct snd_pcm *pcm = rtd->pcm;
- int ret = 0;
-
- if (!card->dev->dma_mask)
- card->dev->dma_mask = &jz4740_pcm_dmamask;
+ int ret;
- if (!card->dev->coherent_dma_mask)
- card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
+ ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
+ if (ret)
+ return ret;
if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
ret = jz4740_pcm_preallocate_dma_buffer(pcm,
diff --git a/sound/soc/kirkwood/kirkwood-dma.c b/sound/soc/kirkwood/kirkwood-dma.c
index b238434..3814bb0 100644
--- a/sound/soc/kirkwood/kirkwood-dma.c
+++ b/sound/soc/kirkwood/kirkwood-dma.c
@@ -59,8 +59,6 @@ static struct snd_pcm_hardware kirkwood_dma_snd_hw = {
.fifo_size = 0,
};
-static u64 kirkwood_dma_dmamask = DMA_BIT_MASK(32);
-
static irqreturn_t kirkwood_dma_irq(int irq, void *dev_id)
{
struct kirkwood_dma_data *priv = dev_id;
@@ -292,10 +290,9 @@ static int kirkwood_dma_new(struct snd_soc_pcm_runtime *rtd)
struct snd_pcm *pcm = rtd->pcm;
int ret;
- if (!card->dev->dma_mask)
- card->dev->dma_mask = &kirkwood_dma_dmamask;
- if (!card->dev->coherent_dma_mask)
- card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
+ ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
+ if (ret)
+ return ret;
if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
ret = kirkwood_dma_preallocate_dma_buffer(pcm,
diff --git a/sound/soc/nuc900/nuc900-pcm.c b/sound/soc/nuc900/nuc900-pcm.c
index c894ff0..f588ee4 100644
--- a/sound/soc/nuc900/nuc900-pcm.c
+++ b/sound/soc/nuc900/nuc900-pcm.c
@@ -314,16 +314,15 @@ static void nuc900_dma_free_dma_buffers(struct snd_pcm *pcm)
snd_pcm_lib_preallocate_free_for_all(pcm);
}
-static u64 nuc900_pcm_dmamask = DMA_BIT_MASK(32);
static int nuc900_dma_new(struct snd_soc_pcm_runtime *rtd)
{
struct snd_card *card = rtd->card->snd_card;
struct snd_pcm *pcm = rtd->pcm;
+ int ret;
- if (!card->dev->dma_mask)
- card->dev->dma_mask = &nuc900_pcm_dmamask;
- if (!card->dev->coherent_dma_mask)
- card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
+ ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
+ if (ret)
+ return ret;
snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
card->dev, 4 * 1024, (4 * 1024) - 1);
diff --git a/sound/soc/omap/omap-pcm.c b/sound/soc/omap/omap-pcm.c
index a11405d..b8fa986 100644
--- a/sound/soc/omap/omap-pcm.c
+++ b/sound/soc/omap/omap-pcm.c
@@ -156,8 +156,6 @@ static struct snd_pcm_ops omap_pcm_ops = {
.mmap = omap_pcm_mmap,
};
-static u64 omap_pcm_dmamask = DMA_BIT_MASK(64);
-
static int omap_pcm_preallocate_dma_buffer(struct snd_pcm *pcm,
int stream)
{
@@ -202,12 +200,11 @@ static int omap_pcm_new(struct snd_soc_pcm_runtime *rtd)
{
struct snd_card *card = rtd->card->snd_card;
struct snd_pcm *pcm = rtd->pcm;
- int ret = 0;
+ int ret;
- if (!card->dev->dma_mask)
- card->dev->dma_mask = &omap_pcm_dmamask;
- if (!card->dev->coherent_dma_mask)
- card->dev->coherent_dma_mask = DMA_BIT_MASK(64);
+ ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(64));
+ if (ret)
+ return ret;
if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
ret = omap_pcm_preallocate_dma_buffer(pcm,
diff --git a/sound/soc/pxa/pxa2xx-pcm.c b/sound/soc/pxa/pxa2xx-pcm.c
index 806da27..d58b09f 100644
--- a/sound/soc/pxa/pxa2xx-pcm.c
+++ b/sound/soc/pxa/pxa2xx-pcm.c
@@ -87,18 +87,15 @@ static struct snd_pcm_ops pxa2xx_pcm_ops = {
.mmap = pxa2xx_pcm_mmap,
};
-static u64 pxa2xx_pcm_dmamask = DMA_BIT_MASK(32);
-
static int pxa2xx_soc_pcm_new(struct snd_soc_pcm_runtime *rtd)
{
struct snd_card *card = rtd->card->snd_card;
struct snd_pcm *pcm = rtd->pcm;
- int ret = 0;
+ int ret;
- if (!card->dev->dma_mask)
- card->dev->dma_mask = &pxa2xx_pcm_dmamask;
- if (!card->dev->coherent_dma_mask)
- card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
+ ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
+ if (ret)
+ return ret;
if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
ret = pxa2xx_pcm_preallocate_dma_buffer(pcm,
diff --git a/sound/soc/s6000/s6000-pcm.c b/sound/soc/s6000/s6000-pcm.c
index d0740a7..283620a 100644
--- a/sound/soc/s6000/s6000-pcm.c
+++ b/sound/soc/s6000/s6000-pcm.c
@@ -444,8 +444,6 @@ static void s6000_pcm_free(struct snd_pcm *pcm)
snd_pcm_lib_preallocate_free_for_all(pcm);
}
-static u64 s6000_pcm_dmamask = DMA_BIT_MASK(32);
-
static int s6000_pcm_new(struct snd_soc_pcm_runtime *runtime)
{
struct snd_card *card = runtime->card->snd_card;
@@ -456,10 +454,9 @@ static int s6000_pcm_new(struct snd_soc_pcm_runtime *runtime)
params = snd_soc_dai_get_dma_data(runtime->cpu_dai,
pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream);
- if (!card->dev->dma_mask)
- card->dev->dma_mask = &s6000_pcm_dmamask;
- if (!card->dev->coherent_dma_mask)
- card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
+ res = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
+ if (res)
+ return res;
if (params->dma_in) {
s6dmac_disable_chan(DMA_MASK_DMAC(params->dma_in),
diff --git a/sound/soc/samsung/dma.c b/sound/soc/samsung/dma.c
index 9338d11..fe2748b 100644
--- a/sound/soc/samsung/dma.c
+++ b/sound/soc/samsung/dma.c
@@ -406,20 +406,17 @@ static void dma_free_dma_buffers(struct snd_pcm *pcm)
}
}
-static u64 dma_mask = DMA_BIT_MASK(32);
-
static int dma_new(struct snd_soc_pcm_runtime *rtd)
{
struct snd_card *card = rtd->card->snd_card;
struct snd_pcm *pcm = rtd->pcm;
- int ret = 0;
+ int ret;
pr_debug("Entered %s\n", __func__);
- if (!card->dev->dma_mask)
- card->dev->dma_mask = &dma_mask;
- if (!card->dev->coherent_dma_mask)
- card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
+ ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
+ if (ret)
+ return ret;
if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
ret = preallocate_dma_buffer(pcm,
diff --git a/sound/soc/samsung/idma.c b/sound/soc/samsung/idma.c
index ce1e1e1..e4f318f 100644
--- a/sound/soc/samsung/idma.c
+++ b/sound/soc/samsung/idma.c
@@ -383,18 +383,15 @@ static int preallocate_idma_buffer(struct snd_pcm *pcm, int stream)
return 0;
}
-static u64 idma_mask = DMA_BIT_MASK(32);
-
static int idma_new(struct snd_soc_pcm_runtime *rtd)
{
struct snd_card *card = rtd->card->snd_card;
struct snd_pcm *pcm = rtd->pcm;
- int ret = 0;
+ int ret;
- if (!card->dev->dma_mask)
- card->dev->dma_mask = &idma_mask;
- if (!card->dev->coherent_dma_mask)
- card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
+ ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
+ if (ret)
+ return ret;
if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
ret = preallocate_idma_buffer(pcm,
--
1.7.4.4
^ permalink raw reply related
* [PATCH 29/51] DMA-API: ata: pata_octeon_cf: convert to use dma_coerce_mask_and_coherent()
From: Russell King @ 2013-09-19 21:54 UTC (permalink / raw)
To: alsa-devel, b43-dev, devel, devicetree, dri-devel, e1000-devel,
linux-arm-kernel, linux-crypto, linux-doc, linux-fbdev, linux-ide,
linux-media, linux-mmc, linux-nvme, linux-omap, linuxppc-dev,
linux-samsung-soc, linux-scsi, linux-tegra, linux-usb,
linux-wireless, netdev, Solarflare linux maintainers,
uclinux-dist-devel
Cc: Tejun Heo
In-Reply-To: <20130919212235.GD12758@n2100.arm.linux.org.uk>
Convert this code sequence:
pdev->dev.coherent_dma_mask = DMA_BIT_MASK(64);
pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
to use dma_coerce_mask_and_coherent() to avoid bypassing the architecture
check on the DMA mask.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
drivers/ata/pata_octeon_cf.c | 5 +++--
1 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/ata/pata_octeon_cf.c b/drivers/ata/pata_octeon_cf.c
index c51bbb9..6231d43 100644
--- a/drivers/ata/pata_octeon_cf.c
+++ b/drivers/ata/pata_octeon_cf.c
@@ -1014,8 +1014,9 @@ static int octeon_cf_probe(struct platform_device *pdev)
}
cf_port->c0 = ap->ioaddr.ctl_addr;
- pdev->dev.coherent_dma_mask = DMA_BIT_MASK(64);
- pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
+ rv = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
+ if (rv)
+ return ret;
ata_port_desc(ap, "cmd %p ctl %p", base, ap->ioaddr.ctl_addr);
--
1.7.4.4
^ permalink raw reply related
* [PATCH 30/51] DMA-API: dma: dw_dmac.c: convert to use dma_coerce_mask_and_coherent()
From: Russell King @ 2013-09-19 21:55 UTC (permalink / raw)
To: alsa-devel, b43-dev, devel, devicetree, dri-devel, e1000-devel,
linux-arm-kernel, linux-crypto, linux-doc, linux-fbdev, linux-ide,
linux-media, linux-mmc, linux-nvme, linux-omap, linuxppc-dev,
linux-samsung-soc, linux-scsi, linux-tegra, linux-usb,
linux-wireless, netdev, Solarflare linux maintainers,
uclinux-dist-devel
Cc: Vinod Koul, Dan Williams, Andy Shevchenko, Viresh Kumar
In-Reply-To: <20130919212235.GD12758@n2100.arm.linux.org.uk>
This code sequence:
if (!pdev->dev.dma_mask) {
pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
}
bypasses the architectures check on the DMA mask. It can be replaced
with dma_coerce_mask_and_coherent(), avoiding the direct initialization
of this mask.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
drivers/dma/dw/platform.c | 8 +++-----
1 files changed, 3 insertions(+), 5 deletions(-)
diff --git a/drivers/dma/dw/platform.c b/drivers/dma/dw/platform.c
index e35d975..453822c 100644
--- a/drivers/dma/dw/platform.c
+++ b/drivers/dma/dw/platform.c
@@ -191,11 +191,9 @@ static int dw_probe(struct platform_device *pdev)
if (IS_ERR(chip->regs))
return PTR_ERR(chip->regs);
- /* Apply default dma_mask if needed */
- if (!dev->dma_mask) {
- dev->dma_mask = &dev->coherent_dma_mask;
- dev->coherent_dma_mask = DMA_BIT_MASK(32);
- }
+ err = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
+ if (err)
+ return err;
pdata = dev_get_platdata(dev);
if (!pdata)
--
1.7.4.4
^ permalink raw reply related
* [PATCH 31/51] DMA-API: media: omap3isp: use dma_coerce_mask_and_coherent()
From: Russell King @ 2013-09-19 21:56 UTC (permalink / raw)
To: alsa-devel, b43-dev, devel, devicetree, dri-devel, e1000-devel,
linux-arm-kernel, linux-crypto, linux-doc, linux-fbdev, linux-ide,
linux-media, linux-mmc, linux-nvme, linux-omap, linuxppc-dev,
linux-samsung-soc, linux-scsi, linux-tegra, linux-usb,
linux-wireless, netdev, Solarflare linux maintainers,
uclinux-dist-devel
Cc: Laurent Pinchart, Mauro Carvalho Chehab
In-Reply-To: <20130919212235.GD12758@n2100.arm.linux.org.uk>
The code sequence:
isp->raw_dmamask = DMA_BIT_MASK(32);
isp->dev->dma_mask = &isp->raw_dmamask;
isp->dev->coherent_dma_mask = DMA_BIT_MASK(32);
bypasses the architectures check on the DMA mask. It can be replaced
with dma_coerce_mask_and_coherent(), avoiding the direct initialization
of this mask.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
drivers/media/platform/omap3isp/isp.c | 6 +++---
drivers/media/platform/omap3isp/isp.h | 3 ---
2 files changed, 3 insertions(+), 6 deletions(-)
diff --git a/drivers/media/platform/omap3isp/isp.c b/drivers/media/platform/omap3isp/isp.c
index df3a0ec..1c36080 100644
--- a/drivers/media/platform/omap3isp/isp.c
+++ b/drivers/media/platform/omap3isp/isp.c
@@ -2182,9 +2182,9 @@ static int isp_probe(struct platform_device *pdev)
isp->pdata = pdata;
isp->ref_count = 0;
- isp->raw_dmamask = DMA_BIT_MASK(32);
- isp->dev->dma_mask = &isp->raw_dmamask;
- isp->dev->coherent_dma_mask = DMA_BIT_MASK(32);
+ ret = dma_coerce_mask_and_coherent(isp->dev, DMA_BIT_MASK(32));
+ if (ret)
+ return ret;
platform_set_drvdata(pdev, isp);
diff --git a/drivers/media/platform/omap3isp/isp.h b/drivers/media/platform/omap3isp/isp.h
index cd3eff4..ce65d3a 100644
--- a/drivers/media/platform/omap3isp/isp.h
+++ b/drivers/media/platform/omap3isp/isp.h
@@ -152,7 +152,6 @@ struct isp_xclk {
* @mmio_base_phys: Array with physical L4 bus addresses for ISP register
* regions.
* @mmio_size: Array with ISP register regions size in bytes.
- * @raw_dmamask: Raw DMA mask
* @stat_lock: Spinlock for handling statistics
* @isp_mutex: Mutex for serializing requests to ISP.
* @crashed: Bitmask of crashed entities (indexed by entity ID)
@@ -190,8 +189,6 @@ struct isp_device {
unsigned long mmio_base_phys[OMAP3_ISP_IOMEM_LAST];
resource_size_t mmio_size[OMAP3_ISP_IOMEM_LAST];
- u64 raw_dmamask;
-
/* ISP Obj */
spinlock_t stat_lock; /* common lock for statistic drivers */
struct mutex isp_mutex; /* For handling ref_count field */
--
1.7.4.4
^ permalink raw reply related
* [PATCH 32/51] DMA-API: mmc: sdhci-acpi: use dma_coerce_mask_and_coherent()
From: Russell King @ 2013-09-19 21:57 UTC (permalink / raw)
To: alsa-devel, b43-dev, devel, devicetree, dri-devel, e1000-devel,
linux-arm-kernel, linux-crypto, linux-doc, linux-fbdev, linux-ide,
linux-media, linux-mmc, linux-nvme, linux-omap, linuxppc-dev,
linux-samsung-soc, linux-scsi, linux-tegra, linux-usb,
linux-wireless, netdev, Solarflare linux maintainers,
uclinux-dist-devel
Cc: Chris Ball
In-Reply-To: <20130919212235.GD12758@n2100.arm.linux.org.uk>
The code sequence:
dev->dma_mask = &dev->coherent_dma_mask;
dev->coherent_dma_mask = dma_mask;
bypasses the architectures check on the DMA mask. It can be replaced
with dma_coerce_mask_and_coherent(), avoiding the direct initialization
of this mask.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
drivers/mmc/host/sdhci-acpi.c | 5 +++--
1 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/mmc/host/sdhci-acpi.c b/drivers/mmc/host/sdhci-acpi.c
index cdd4ce0..ef19874 100644
--- a/drivers/mmc/host/sdhci-acpi.c
+++ b/drivers/mmc/host/sdhci-acpi.c
@@ -310,8 +310,9 @@ static int sdhci_acpi_probe(struct platform_device *pdev)
dma_mask = DMA_BIT_MASK(32);
}
- dev->dma_mask = &dev->coherent_dma_mask;
- dev->coherent_dma_mask = dma_mask;
+ err = dma_coerce_mask_and_coherent(dev, dma_mask);
+ if (err)
+ goto err_free;
}
if (c->slot) {
--
1.7.4.4
^ permalink raw reply related
* [PATCH 33/51] DMA-API: net: nxp/lpc_eth: use dma_coerce_mask_and_coherent()
From: Russell King @ 2013-09-19 21:58 UTC (permalink / raw)
To: alsa-devel, b43-dev, devel, devicetree, dri-devel, e1000-devel,
linux-arm-kernel, linux-crypto, linux-doc, linux-fbdev, linux-ide,
linux-media, linux-mmc, linux-nvme, linux-omap, linuxppc-dev,
linux-samsung-soc, linux-scsi, linux-tegra, linux-usb,
linux-wireless, netdev, Solarflare linux maintainers,
uclinux-dist-devel
In-Reply-To: <20130919212235.GD12758@n2100.arm.linux.org.uk>
The code sequence:
pldat->pdev->dev.coherent_dma_mask = 0xFFFFFFFF;
pldat->pdev->dev.dma_mask = &pldat->pdev->dev.coherent_dma_mask;
bypasses the architectures check on the DMA mask. It can be replaced
with dma_coerce_mask_and_coherent(), avoiding the direct initialization
of this mask.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
drivers/net/ethernet/nxp/lpc_eth.c | 6 ++++--
1 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/nxp/lpc_eth.c b/drivers/net/ethernet/nxp/lpc_eth.c
index a061b93..ba3ca18 100644
--- a/drivers/net/ethernet/nxp/lpc_eth.c
+++ b/drivers/net/ethernet/nxp/lpc_eth.c
@@ -1399,8 +1399,10 @@ static int lpc_eth_drv_probe(struct platform_device *pdev)
}
if (pldat->dma_buff_base_v = 0) {
- pldat->pdev->dev.coherent_dma_mask = 0xFFFFFFFF;
- pldat->pdev->dev.dma_mask = &pldat->pdev->dev.coherent_dma_mask;
+ ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
+ if (ret)
+ goto err_out_free_irq;
+
pldat->dma_buff_size = PAGE_ALIGN(pldat->dma_buff_size);
/* Allocate a chunk of memory for the DMA ethernet buffers
--
1.7.4.4
^ permalink raw reply related
* [PATCH 34/51] DMA-API: net: octeon: use dma_coerce_mask_and_coherent()
From: Russell King @ 2013-09-19 21:59 UTC (permalink / raw)
To: alsa-devel, b43-dev, devel, devicetree, dri-devel, e1000-devel,
linux-arm-kernel, linux-crypto, linux-doc, linux-fbdev, linux-ide,
linux-media, linux-mmc, linux-nvme, linux-omap, linuxppc-dev,
linux-samsung-soc, linux-scsi, linux-tegra, linux-usb,
linux-wireless, netdev, Solarflare linux maintainers,
uclinux-dist-devel
In-Reply-To: <20130919212235.GD12758@n2100.arm.linux.org.uk>
The code sequence:
pdev->dev.coherent_dma_mask = DMA_BIT_MASK(64);
pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
bypasses the architectures check on the DMA mask. It can be replaced
with dma_coerce_mask_and_coherent(), avoiding the direct initialization
of this mask.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
drivers/net/ethernet/octeon/octeon_mgmt.c | 5 +++--
1 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/octeon/octeon_mgmt.c b/drivers/net/ethernet/octeon/octeon_mgmt.c
index 622aa75..2006a07 100644
--- a/drivers/net/ethernet/octeon/octeon_mgmt.c
+++ b/drivers/net/ethernet/octeon/octeon_mgmt.c
@@ -1552,8 +1552,9 @@ static int octeon_mgmt_probe(struct platform_device *pdev)
p->phy_np = of_parse_phandle(pdev->dev.of_node, "phy-handle", 0);
- pdev->dev.coherent_dma_mask = DMA_BIT_MASK(64);
- pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
+ result = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
+ if (result)
+ goto err;
netif_carrier_off(netdev);
result = register_netdev(netdev);
--
1.7.4.4
^ permalink raw reply related
* [PATCH 35/51] DMA-API: parport: parport_pc.c: use dma_coerce_mask_and_coherent()
From: Russell King @ 2013-09-19 22:00 UTC (permalink / raw)
To: alsa-devel, b43-dev, devel, devicetree, dri-devel, e1000-devel,
linux-arm-kernel, linux-crypto, linux-doc, linux-fbdev, linux-ide,
linux-media, linux-mmc, linux-nvme, linux-omap, linuxppc-dev,
linux-samsung-soc, linux-scsi, linux-tegra, linux-usb,
linux-wireless, netdev, Solarflare linux maintainers,
uclinux-dist-devel
In-Reply-To: <20130919212235.GD12758@n2100.arm.linux.org.uk>
The code sequence:
dev->coherent_dma_mask = DMA_BIT_MASK(24);
dev->dma_mask = &dev->coherent_dma_mask;
bypasses the architectures check on the DMA mask. It can be replaced
with dma_coerce_mask_and_coherent(), avoiding the direct initialization
of this mask.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
drivers/parport/parport_pc.c | 8 ++++++--
1 files changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/parport/parport_pc.c b/drivers/parport/parport_pc.c
index 903e128..9637615 100644
--- a/drivers/parport/parport_pc.c
+++ b/drivers/parport/parport_pc.c
@@ -2004,6 +2004,7 @@ struct parport *parport_pc_probe_port(unsigned long int base,
struct resource *ECR_res = NULL;
struct resource *EPP_res = NULL;
struct platform_device *pdev = NULL;
+ int ret;
if (!dev) {
/* We need a physical device to attach to, but none was
@@ -2014,8 +2015,11 @@ struct parport *parport_pc_probe_port(unsigned long int base,
return NULL;
dev = &pdev->dev;
- dev->coherent_dma_mask = DMA_BIT_MASK(24);
- dev->dma_mask = &dev->coherent_dma_mask;
+ ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(24));
+ if (ret) {
+ dev_err(dev, "Unable to set coherent dma mask: disabling DMA\n");
+ dma = PARPORT_DMA_NONE;
+ }
}
ops = kmalloc(sizeof(struct parport_operations), GFP_KERNEL);
--
1.7.4.4
^ permalink raw reply related
* [PATCH 36/51] DMA-API: usb: use dma_set_coherent_mask()
From: Russell King @ 2013-09-19 22:01 UTC (permalink / raw)
To: alsa-devel, b43-dev, devel, devicetree, dri-devel, e1000-devel,
linux-arm-kernel, linux-crypto, linux-doc, linux-fbdev, linux-ide,
linux-media, linux-mmc, linux-nvme, linux-omap, linuxppc-dev,
linux-samsung-soc, linux-scsi, linux-tegra, linux-usb,
linux-wireless, netdev, Solarflare linux maintainers,
uclinux-dist-devel
Cc: Kukjin Kim, Stephen Warren, Alexander Shishkin,
Greg Kroah-Hartman, Felipe Balbi, Alan Stern
In-Reply-To: <20130919212235.GD12758@n2100.arm.linux.org.uk>
The correct way for a driver to specify the coherent DMA mask is
not to directly access the field in the struct device, but to use
dma_set_coherent_mask(). Only arch and bus code should access this
member directly.
Convert all direct write accesses to using the correct API.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
drivers/usb/chipidea/ci_hdrc_imx.c | 5 +++--
drivers/usb/dwc3/dwc3-exynos.c | 5 +++--
drivers/usb/gadget/lpc32xx_udc.c | 4 +++-
drivers/usb/host/ehci-atmel.c | 5 +++--
drivers/usb/host/ehci-octeon.c | 4 +++-
drivers/usb/host/ehci-omap.c | 8 +++++---
drivers/usb/host/ehci-orion.c | 5 +++--
drivers/usb/host/ehci-platform.c | 7 ++++---
drivers/usb/host/ehci-s5p.c | 5 +++--
drivers/usb/host/ehci-spear.c | 5 +++--
drivers/usb/host/ehci-tegra.c | 5 +++--
drivers/usb/host/ohci-at91.c | 7 ++++---
drivers/usb/host/ohci-exynos.c | 5 +++--
drivers/usb/host/ohci-nxp.c | 4 +++-
drivers/usb/host/ohci-octeon.c | 4 +++-
drivers/usb/host/ohci-omap3.c | 8 +++++---
drivers/usb/host/ohci-pxa27x.c | 6 ++++--
drivers/usb/host/ohci-spear.c | 5 +++--
drivers/usb/host/uhci-platform.c | 5 +++--
19 files changed, 64 insertions(+), 38 deletions(-)
diff --git a/drivers/usb/chipidea/ci_hdrc_imx.c b/drivers/usb/chipidea/ci_hdrc_imx.c
index 74d998d..bf33bd3 100644
--- a/drivers/usb/chipidea/ci_hdrc_imx.c
+++ b/drivers/usb/chipidea/ci_hdrc_imx.c
@@ -123,8 +123,9 @@ static int ci_hdrc_imx_probe(struct platform_device *pdev)
if (!pdev->dev.dma_mask)
pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
- if (!pdev->dev.coherent_dma_mask)
- pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
+ ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
+ if (ret)
+ goto err_clk;
if (data->usbmisc_data) {
ret = imx_usbmisc_init(data->usbmisc_data);
diff --git a/drivers/usb/dwc3/dwc3-exynos.c b/drivers/usb/dwc3/dwc3-exynos.c
index 2f2e88a..c10b324 100644
--- a/drivers/usb/dwc3/dwc3-exynos.c
+++ b/drivers/usb/dwc3/dwc3-exynos.c
@@ -121,8 +121,9 @@ static int dwc3_exynos_probe(struct platform_device *pdev)
*/
if (!dev->dma_mask)
dev->dma_mask = &dev->coherent_dma_mask;
- if (!dev->coherent_dma_mask)
- dev->coherent_dma_mask = DMA_BIT_MASK(32);
+ ret = dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
+ if (ret)
+ goto err1;
platform_set_drvdata(pdev, exynos);
diff --git a/drivers/usb/gadget/lpc32xx_udc.c b/drivers/usb/gadget/lpc32xx_udc.c
index 67128be..6a2a65a 100644
--- a/drivers/usb/gadget/lpc32xx_udc.c
+++ b/drivers/usb/gadget/lpc32xx_udc.c
@@ -3078,7 +3078,9 @@ static int __init lpc32xx_udc_probe(struct platform_device *pdev)
udc->isp1301_i2c_client->addr);
pdev->dev.dma_mask = &lpc32xx_usbd_dmamask;
- pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
+ retval = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
+ if (retval)
+ goto resource_fail;
udc->board = &lpc32xx_usbddata;
diff --git a/drivers/usb/host/ehci-atmel.c b/drivers/usb/host/ehci-atmel.c
index 3b645ff..5831a88 100644
--- a/drivers/usb/host/ehci-atmel.c
+++ b/drivers/usb/host/ehci-atmel.c
@@ -92,8 +92,9 @@ static int ehci_atmel_drv_probe(struct platform_device *pdev)
*/
if (!pdev->dev.dma_mask)
pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
- if (!pdev->dev.coherent_dma_mask)
- pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
+ retval = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
+ if (retval)
+ goto fail_create_hcd;
hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
if (!hcd) {
diff --git a/drivers/usb/host/ehci-octeon.c b/drivers/usb/host/ehci-octeon.c
index ab0397e..4c528b2 100644
--- a/drivers/usb/host/ehci-octeon.c
+++ b/drivers/usb/host/ehci-octeon.c
@@ -116,8 +116,10 @@ static int ehci_octeon_drv_probe(struct platform_device *pdev)
* We can DMA from anywhere. But the descriptors must be in
* the lower 4GB.
*/
- pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
pdev->dev.dma_mask = &ehci_octeon_dma_mask;
+ ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
+ if (ret)
+ return ret;
hcd = usb_create_hcd(&ehci_octeon_hc_driver, &pdev->dev, "octeon");
if (!hcd)
diff --git a/drivers/usb/host/ehci-omap.c b/drivers/usb/host/ehci-omap.c
index 78b01fa..d0759c5 100644
--- a/drivers/usb/host/ehci-omap.c
+++ b/drivers/usb/host/ehci-omap.c
@@ -104,7 +104,7 @@ static int ehci_hcd_omap_probe(struct platform_device *pdev)
struct resource *res;
struct usb_hcd *hcd;
void __iomem *regs;
- int ret = -ENODEV;
+ int ret;
int irq;
int i;
struct omap_hcd *omap;
@@ -146,9 +146,11 @@ static int ehci_hcd_omap_probe(struct platform_device *pdev)
*/
if (!dev->dma_mask)
dev->dma_mask = &dev->coherent_dma_mask;
- if (!dev->coherent_dma_mask)
- dev->coherent_dma_mask = DMA_BIT_MASK(32);
+ ret = dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
+ if (ret)
+ return ret;
+ ret = -ENODEV;
hcd = usb_create_hcd(&ehci_omap_hc_driver, dev,
dev_name(dev));
if (!hcd) {
diff --git a/drivers/usb/host/ehci-orion.c b/drivers/usb/host/ehci-orion.c
index d1dfb9d..5870206 100644
--- a/drivers/usb/host/ehci-orion.c
+++ b/drivers/usb/host/ehci-orion.c
@@ -182,8 +182,9 @@ static int ehci_orion_drv_probe(struct platform_device *pdev)
*/
if (!pdev->dev.dma_mask)
pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
- if (!pdev->dev.coherent_dma_mask)
- pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
+ err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
+ if (err)
+ goto err1;
if (!request_mem_region(res->start, resource_size(res),
ehci_orion_hc_driver.description)) {
diff --git a/drivers/usb/host/ehci-platform.c b/drivers/usb/host/ehci-platform.c
index f6b790c..5b0cd2d 100644
--- a/drivers/usb/host/ehci-platform.c
+++ b/drivers/usb/host/ehci-platform.c
@@ -78,7 +78,7 @@ static int ehci_platform_probe(struct platform_device *dev)
struct resource *res_mem;
struct usb_ehci_pdata *pdata;
int irq;
- int err = -ENOMEM;
+ int err;
if (usb_disabled())
return -ENODEV;
@@ -91,8 +91,9 @@ static int ehci_platform_probe(struct platform_device *dev)
dev->dev.platform_data = &ehci_platform_defaults;
if (!dev->dev.dma_mask)
dev->dev.dma_mask = &dev->dev.coherent_dma_mask;
- if (!dev->dev.coherent_dma_mask)
- dev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
+ err = dma_set_coherent_mask(&dev->dev, DMA_BIT_MASK(32));
+ if (err)
+ return err;
pdata = dev_get_platdata(&dev->dev);
diff --git a/drivers/usb/host/ehci-s5p.c b/drivers/usb/host/ehci-s5p.c
index 7c3de95..10d6a2e 100644
--- a/drivers/usb/host/ehci-s5p.c
+++ b/drivers/usb/host/ehci-s5p.c
@@ -91,8 +91,9 @@ static int s5p_ehci_probe(struct platform_device *pdev)
*/
if (!pdev->dev.dma_mask)
pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
- if (!pdev->dev.coherent_dma_mask)
- pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
+ err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
+ if (err)
+ return err;
s5p_setup_vbus_gpio(pdev);
diff --git a/drivers/usb/host/ehci-spear.c b/drivers/usb/host/ehci-spear.c
index 1cf0adb..6839e15 100644
--- a/drivers/usb/host/ehci-spear.c
+++ b/drivers/usb/host/ehci-spear.c
@@ -83,8 +83,9 @@ static int spear_ehci_hcd_drv_probe(struct platform_device *pdev)
*/
if (!pdev->dev.dma_mask)
pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
- if (!pdev->dev.coherent_dma_mask)
- pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
+ retval = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
+ if (retval)
+ goto fail;
usbh_clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(usbh_clk)) {
diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c
index 78fa76d..3d9ee43 100644
--- a/drivers/usb/host/ehci-tegra.c
+++ b/drivers/usb/host/ehci-tegra.c
@@ -364,8 +364,9 @@ static int tegra_ehci_probe(struct platform_device *pdev)
*/
if (!pdev->dev.dma_mask)
pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
- if (!pdev->dev.coherent_dma_mask)
- pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
+ err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
+ if (err)
+ return err;
hcd = usb_create_hcd(&tegra_ehci_hc_driver, &pdev->dev,
dev_name(&pdev->dev));
diff --git a/drivers/usb/host/ohci-at91.c b/drivers/usb/host/ohci-at91.c
index caa3764..eb7a2cb 100644
--- a/drivers/usb/host/ohci-at91.c
+++ b/drivers/usb/host/ohci-at91.c
@@ -524,7 +524,7 @@ MODULE_DEVICE_TABLE(of, at91_ohci_dt_ids);
static int ohci_at91_of_init(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
- int i, gpio;
+ int i, gpio, ret;
enum of_gpio_flags flags;
struct at91_usbh_data *pdata;
u32 ports;
@@ -538,8 +538,9 @@ static int ohci_at91_of_init(struct platform_device *pdev)
*/
if (!pdev->dev.dma_mask)
pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
- if (!pdev->dev.coherent_dma_mask)
- pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
+ ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
+ if (ret)
+ return ret;
pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
if (!pdata)
diff --git a/drivers/usb/host/ohci-exynos.c b/drivers/usb/host/ohci-exynos.c
index dc6ee9a..ed685cb 100644
--- a/drivers/usb/host/ohci-exynos.c
+++ b/drivers/usb/host/ohci-exynos.c
@@ -116,8 +116,9 @@ static int exynos_ohci_probe(struct platform_device *pdev)
*/
if (!pdev->dev.dma_mask)
pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
- if (!pdev->dev.coherent_dma_mask)
- pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
+ err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
+ if (err)
+ return err;
exynos_ohci = devm_kzalloc(&pdev->dev, sizeof(struct exynos_ohci_hcd),
GFP_KERNEL);
diff --git a/drivers/usb/host/ohci-nxp.c b/drivers/usb/host/ohci-nxp.c
index 7d7d507..5f82db4 100644
--- a/drivers/usb/host/ohci-nxp.c
+++ b/drivers/usb/host/ohci-nxp.c
@@ -226,8 +226,10 @@ static int usb_hcd_nxp_probe(struct platform_device *pdev)
return -EPROBE_DEFER;
}
- pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
+ ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
+ if (ret)
+ goto fail_disable;
dev_dbg(&pdev->dev, "%s: " DRIVER_DESC " (nxp)\n", hcd_name);
if (usb_disabled()) {
diff --git a/drivers/usb/host/ohci-octeon.c b/drivers/usb/host/ohci-octeon.c
index 342dc7e..ac1dea1 100644
--- a/drivers/usb/host/ohci-octeon.c
+++ b/drivers/usb/host/ohci-octeon.c
@@ -127,8 +127,10 @@ static int ohci_octeon_drv_probe(struct platform_device *pdev)
}
/* Ohci is a 32-bit device. */
- pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
+ ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
+ if (ret)
+ return ret;
hcd = usb_create_hcd(&ohci_octeon_hc_driver, &pdev->dev, "octeon");
if (!hcd)
diff --git a/drivers/usb/host/ohci-omap3.c b/drivers/usb/host/ohci-omap3.c
index a09af26..664f5dc 100644
--- a/drivers/usb/host/ohci-omap3.c
+++ b/drivers/usb/host/ohci-omap3.c
@@ -132,7 +132,7 @@ static int ohci_hcd_omap3_probe(struct platform_device *pdev)
struct usb_hcd *hcd = NULL;
void __iomem *regs = NULL;
struct resource *res;
- int ret = -ENODEV;
+ int ret;
int irq;
if (usb_disabled())
@@ -168,9 +168,11 @@ static int ohci_hcd_omap3_probe(struct platform_device *pdev)
*/
if (!dev->dma_mask)
dev->dma_mask = &dev->coherent_dma_mask;
- if (!dev->coherent_dma_mask)
- dev->coherent_dma_mask = DMA_BIT_MASK(32);
+ ret = dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
+ if (ret)
+ goto err_io;
+ ret = -ENODEV;
hcd = usb_create_hcd(&ohci_omap3_hc_driver, dev,
dev_name(dev));
if (!hcd) {
diff --git a/drivers/usb/host/ohci-pxa27x.c b/drivers/usb/host/ohci-pxa27x.c
index 93371a2..74696ae 100644
--- a/drivers/usb/host/ohci-pxa27x.c
+++ b/drivers/usb/host/ohci-pxa27x.c
@@ -287,6 +287,7 @@ static int ohci_pxa_of_init(struct platform_device *pdev)
struct device_node *np = pdev->dev.of_node;
struct pxaohci_platform_data *pdata;
u32 tmp;
+ int ret;
if (!np)
return 0;
@@ -297,8 +298,9 @@ static int ohci_pxa_of_init(struct platform_device *pdev)
*/
if (!pdev->dev.dma_mask)
pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
- if (!pdev->dev.coherent_dma_mask)
- pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
+ ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
+ if (ret)
+ return ret;
pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
if (!pdata)
diff --git a/drivers/usb/host/ohci-spear.c b/drivers/usb/host/ohci-spear.c
index cc9dd9e..195a0a1 100644
--- a/drivers/usb/host/ohci-spear.c
+++ b/drivers/usb/host/ohci-spear.c
@@ -113,8 +113,9 @@ static int spear_ohci_hcd_drv_probe(struct platform_device *pdev)
*/
if (!pdev->dev.dma_mask)
pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
- if (!pdev->dev.coherent_dma_mask)
- pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
+ retval = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
+ if (retval)
+ goto fail;
usbh_clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(usbh_clk)) {
diff --git a/drivers/usb/host/uhci-platform.c b/drivers/usb/host/uhci-platform.c
index d033a0e..048912d 100644
--- a/drivers/usb/host/uhci-platform.c
+++ b/drivers/usb/host/uhci-platform.c
@@ -77,8 +77,9 @@ static int uhci_hcd_platform_probe(struct platform_device *pdev)
*/
if (!pdev->dev.dma_mask)
pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
- if (!pdev->dev.coherent_dma_mask)
- pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
+ ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
+ if (ret)
+ return ret;
hcd = usb_create_hcd(&uhci_platform_hc_driver, &pdev->dev,
pdev->name);
--
1.7.4.4
^ permalink raw reply related
* [PATCH 37/51] DMA-API: usb: use new dma_coerce_mask_and_coherent()
From: Russell King @ 2013-09-19 22:02 UTC (permalink / raw)
To: alsa-devel, b43-dev, devel, devicetree, dri-devel, e1000-devel,
linux-arm-kernel, linux-crypto, linux-doc, linux-fbdev, linux-ide,
linux-media, linux-mmc, linux-nvme, linux-omap, linuxppc-dev,
linux-samsung-soc, linux-scsi, linux-tegra, linux-usb,
linux-wireless, netdev, Solarflare linux maintainers,
uclinux-dist-devel
Cc: Kukjin Kim, Stephen Warren, Alexander Shishkin,
Greg Kroah-Hartman, Felipe Balbi, Alan Stern
In-Reply-To: <20130919212235.GD12758@n2100.arm.linux.org.uk>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
drivers/usb/chipidea/ci_hdrc_imx.c | 4 +---
drivers/usb/dwc3/dwc3-exynos.c | 4 +---
drivers/usb/host/ehci-atmel.c | 4 +---
drivers/usb/host/ehci-omap.c | 4 +---
drivers/usb/host/ehci-orion.c | 4 +---
drivers/usb/host/ehci-platform.c | 5 ++---
drivers/usb/host/ehci-s5p.c | 4 +---
drivers/usb/host/ehci-spear.c | 4 +---
drivers/usb/host/ehci-tegra.c | 4 +---
drivers/usb/host/ohci-at91.c | 4 +---
drivers/usb/host/ohci-exynos.c | 4 +---
drivers/usb/host/ohci-nxp.c | 3 +--
drivers/usb/host/ohci-octeon.c | 3 +--
drivers/usb/host/ohci-omap3.c | 4 +---
drivers/usb/host/ohci-pxa27x.c | 4 +---
drivers/usb/host/ohci-spear.c | 4 +---
drivers/usb/host/uhci-platform.c | 4 +---
17 files changed, 18 insertions(+), 49 deletions(-)
diff --git a/drivers/usb/chipidea/ci_hdrc_imx.c b/drivers/usb/chipidea/ci_hdrc_imx.c
index bf33bd3..af731db 100644
--- a/drivers/usb/chipidea/ci_hdrc_imx.c
+++ b/drivers/usb/chipidea/ci_hdrc_imx.c
@@ -121,9 +121,7 @@ static int ci_hdrc_imx_probe(struct platform_device *pdev)
pdata.phy = data->phy;
- if (!pdev->dev.dma_mask)
- pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
- ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
+ ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
if (ret)
goto err_clk;
diff --git a/drivers/usb/dwc3/dwc3-exynos.c b/drivers/usb/dwc3/dwc3-exynos.c
index c10b324..8b20c70 100644
--- a/drivers/usb/dwc3/dwc3-exynos.c
+++ b/drivers/usb/dwc3/dwc3-exynos.c
@@ -119,9 +119,7 @@ static int dwc3_exynos_probe(struct platform_device *pdev)
* Since shared usb code relies on it, set it here for now.
* Once we move to full device tree support this will vanish off.
*/
- if (!dev->dma_mask)
- dev->dma_mask = &dev->coherent_dma_mask;
- ret = dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
+ ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(32));
if (ret)
goto err1;
diff --git a/drivers/usb/host/ehci-atmel.c b/drivers/usb/host/ehci-atmel.c
index 5831a88..8e7323e 100644
--- a/drivers/usb/host/ehci-atmel.c
+++ b/drivers/usb/host/ehci-atmel.c
@@ -90,9 +90,7 @@ static int ehci_atmel_drv_probe(struct platform_device *pdev)
* Since shared usb code relies on it, set it here for now.
* Once we have dma capability bindings this can go away.
*/
- if (!pdev->dev.dma_mask)
- pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
- retval = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
+ retval = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
if (retval)
goto fail_create_hcd;
diff --git a/drivers/usb/host/ehci-omap.c b/drivers/usb/host/ehci-omap.c
index d0759c5..6fa82d6 100644
--- a/drivers/usb/host/ehci-omap.c
+++ b/drivers/usb/host/ehci-omap.c
@@ -144,9 +144,7 @@ static int ehci_hcd_omap_probe(struct platform_device *pdev)
* Since shared usb code relies on it, set it here for now.
* Once we have dma capability bindings this can go away.
*/
- if (!dev->dma_mask)
- dev->dma_mask = &dev->coherent_dma_mask;
- ret = dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
+ ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(32));
if (ret)
return ret;
diff --git a/drivers/usb/host/ehci-orion.c b/drivers/usb/host/ehci-orion.c
index 5870206..2ba7673 100644
--- a/drivers/usb/host/ehci-orion.c
+++ b/drivers/usb/host/ehci-orion.c
@@ -180,9 +180,7 @@ static int ehci_orion_drv_probe(struct platform_device *pdev)
* set. Since shared usb code relies on it, set it here for
* now. Once we have dma capability bindings this can go away.
*/
- if (!pdev->dev.dma_mask)
- pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
- err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
+ err = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
if (err)
goto err1;
diff --git a/drivers/usb/host/ehci-platform.c b/drivers/usb/host/ehci-platform.c
index 5b0cd2d..7f30b71 100644
--- a/drivers/usb/host/ehci-platform.c
+++ b/drivers/usb/host/ehci-platform.c
@@ -89,9 +89,8 @@ static int ehci_platform_probe(struct platform_device *dev)
*/
if (!dev_get_platdata(&dev->dev))
dev->dev.platform_data = &ehci_platform_defaults;
- if (!dev->dev.dma_mask)
- dev->dev.dma_mask = &dev->dev.coherent_dma_mask;
- err = dma_set_coherent_mask(&dev->dev, DMA_BIT_MASK(32));
+
+ err = dma_coerce_mask_and_coherent(&dev->dev, DMA_BIT_MASK(32));
if (err)
return err;
diff --git a/drivers/usb/host/ehci-s5p.c b/drivers/usb/host/ehci-s5p.c
index 10d6a2e..d919ed4 100644
--- a/drivers/usb/host/ehci-s5p.c
+++ b/drivers/usb/host/ehci-s5p.c
@@ -89,9 +89,7 @@ static int s5p_ehci_probe(struct platform_device *pdev)
* Since shared usb code relies on it, set it here for now.
* Once we move to full device tree support this will vanish off.
*/
- if (!pdev->dev.dma_mask)
- pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
- err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
+ err = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
if (err)
return err;
diff --git a/drivers/usb/host/ehci-spear.c b/drivers/usb/host/ehci-spear.c
index 6839e15..ee6f9ff 100644
--- a/drivers/usb/host/ehci-spear.c
+++ b/drivers/usb/host/ehci-spear.c
@@ -81,9 +81,7 @@ static int spear_ehci_hcd_drv_probe(struct platform_device *pdev)
* Since shared usb code relies on it, set it here for now.
* Once we have dma capability bindings this can go away.
*/
- if (!pdev->dev.dma_mask)
- pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
- retval = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
+ retval = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
if (retval)
goto fail;
diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c
index 3d9ee43..e74aaf3 100644
--- a/drivers/usb/host/ehci-tegra.c
+++ b/drivers/usb/host/ehci-tegra.c
@@ -362,9 +362,7 @@ static int tegra_ehci_probe(struct platform_device *pdev)
* Since shared usb code relies on it, set it here for now.
* Once we have dma capability bindings this can go away.
*/
- if (!pdev->dev.dma_mask)
- pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
- err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
+ err = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
if (err)
return err;
diff --git a/drivers/usb/host/ohci-at91.c b/drivers/usb/host/ohci-at91.c
index eb7a2cb..36423db 100644
--- a/drivers/usb/host/ohci-at91.c
+++ b/drivers/usb/host/ohci-at91.c
@@ -536,9 +536,7 @@ static int ohci_at91_of_init(struct platform_device *pdev)
* Since shared usb code relies on it, set it here for now.
* Once we have dma capability bindings this can go away.
*/
- if (!pdev->dev.dma_mask)
- pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
- ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
+ ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
if (ret)
return ret;
diff --git a/drivers/usb/host/ohci-exynos.c b/drivers/usb/host/ohci-exynos.c
index ed685cb..866f246 100644
--- a/drivers/usb/host/ohci-exynos.c
+++ b/drivers/usb/host/ohci-exynos.c
@@ -114,9 +114,7 @@ static int exynos_ohci_probe(struct platform_device *pdev)
* Since shared usb code relies on it, set it here for now.
* Once we move to full device tree support this will vanish off.
*/
- if (!pdev->dev.dma_mask)
- pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
- err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
+ err = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
if (err)
return err;
diff --git a/drivers/usb/host/ohci-nxp.c b/drivers/usb/host/ohci-nxp.c
index 5f82db4..df3eb3e 100644
--- a/drivers/usb/host/ohci-nxp.c
+++ b/drivers/usb/host/ohci-nxp.c
@@ -226,8 +226,7 @@ static int usb_hcd_nxp_probe(struct platform_device *pdev)
return -EPROBE_DEFER;
}
- pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
- ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
+ ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
if (ret)
goto fail_disable;
diff --git a/drivers/usb/host/ohci-octeon.c b/drivers/usb/host/ohci-octeon.c
index ac1dea1..6c16dce 100644
--- a/drivers/usb/host/ohci-octeon.c
+++ b/drivers/usb/host/ohci-octeon.c
@@ -127,8 +127,7 @@ static int ohci_octeon_drv_probe(struct platform_device *pdev)
}
/* Ohci is a 32-bit device. */
- pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
- ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
+ ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
if (ret)
return ret;
diff --git a/drivers/usb/host/ohci-omap3.c b/drivers/usb/host/ohci-omap3.c
index 664f5dc..db9bd6b 100644
--- a/drivers/usb/host/ohci-omap3.c
+++ b/drivers/usb/host/ohci-omap3.c
@@ -166,9 +166,7 @@ static int ohci_hcd_omap3_probe(struct platform_device *pdev)
* Since shared usb code relies on it, set it here for now.
* Once we have dma capability bindings this can go away.
*/
- if (!dev->dma_mask)
- dev->dma_mask = &dev->coherent_dma_mask;
- ret = dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
+ ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(32));
if (ret)
goto err_io;
diff --git a/drivers/usb/host/ohci-pxa27x.c b/drivers/usb/host/ohci-pxa27x.c
index 74696ae..b64949b 100644
--- a/drivers/usb/host/ohci-pxa27x.c
+++ b/drivers/usb/host/ohci-pxa27x.c
@@ -296,9 +296,7 @@ static int ohci_pxa_of_init(struct platform_device *pdev)
* Since shared usb code relies on it, set it here for now.
* Once we have dma capability bindings this can go away.
*/
- if (!pdev->dev.dma_mask)
- pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
- ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
+ ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
if (ret)
return ret;
diff --git a/drivers/usb/host/ohci-spear.c b/drivers/usb/host/ohci-spear.c
index 195a0a1..075bb5e 100644
--- a/drivers/usb/host/ohci-spear.c
+++ b/drivers/usb/host/ohci-spear.c
@@ -111,9 +111,7 @@ static int spear_ohci_hcd_drv_probe(struct platform_device *pdev)
* Since shared usb code relies on it, set it here for now.
* Once we have dma capability bindings this can go away.
*/
- if (!pdev->dev.dma_mask)
- pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
- retval = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
+ retval = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
if (retval)
goto fail;
diff --git a/drivers/usb/host/uhci-platform.c b/drivers/usb/host/uhci-platform.c
index 048912d..f8548b7 100644
--- a/drivers/usb/host/uhci-platform.c
+++ b/drivers/usb/host/uhci-platform.c
@@ -75,9 +75,7 @@ static int uhci_hcd_platform_probe(struct platform_device *pdev)
* Since shared usb code relies on it, set it here for now.
* Once we have dma capability bindings this can go away.
*/
- if (!pdev->dev.dma_mask)
- pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
- ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
+ ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
if (ret)
return ret;
--
1.7.4.4
^ permalink raw reply related
* [PATCH 38/51] DMA-API: staging: use dma_set_coherent_mask()
From: Russell King @ 2013-09-19 22:03 UTC (permalink / raw)
To: alsa-devel, b43-dev, devel, devicetree, dri-devel, e1000-devel,
linux-arm-kernel, linux-crypto, linux-doc, linux-fbdev, linux-ide,
linux-media, linux-mmc, linux-nvme, linux-omap, linuxppc-dev,
linux-samsung-soc, linux-scsi, linux-tegra, linux-usb,
linux-wireless, netdev, Solarflare linux maintainers,
uclinux-dist-devel
Cc: Greg Kroah-Hartman, Paul Zimmerman
In-Reply-To: <20130919212235.GD12758@n2100.arm.linux.org.uk>
The correct way for a driver to specify the coherent DMA mask is
not to directly access the field in the struct device, but to use
dma_set_coherent_mask(). Only arch and bus code should access this
member directly.
Convert all direct write accesses to using the correct API.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
drivers/staging/dwc2/platform.c | 5 +++--
drivers/staging/imx-drm/imx-drm-core.c | 8 ++++++--
drivers/staging/imx-drm/ipuv3-crtc.c | 4 +++-
3 files changed, 12 insertions(+), 5 deletions(-)
diff --git a/drivers/staging/dwc2/platform.c b/drivers/staging/dwc2/platform.c
index 44cce2f..1d68c49 100644
--- a/drivers/staging/dwc2/platform.c
+++ b/drivers/staging/dwc2/platform.c
@@ -100,8 +100,9 @@ static int dwc2_driver_probe(struct platform_device *dev)
*/
if (!dev->dev.dma_mask)
dev->dev.dma_mask = &dev->dev.coherent_dma_mask;
- if (!dev->dev.coherent_dma_mask)
- dev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
+ retval = dma_set_coherent_mask(&dev->dev, DMA_BIT_MASK(32));
+ if (retval)
+ return retval;
irq = platform_get_irq(dev, 0);
if (irq < 0) {
diff --git a/drivers/staging/imx-drm/imx-drm-core.c b/drivers/staging/imx-drm/imx-drm-core.c
index 47c5888..847f430 100644
--- a/drivers/staging/imx-drm/imx-drm-core.c
+++ b/drivers/staging/imx-drm/imx-drm-core.c
@@ -805,6 +805,12 @@ static struct drm_driver imx_drm_driver = {
static int imx_drm_platform_probe(struct platform_device *pdev)
{
+ int ret;
+
+ ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
+ if (ret)
+ return ret;
+
imx_drm_device->dev = &pdev->dev;
return drm_platform_init(&imx_drm_driver, pdev);
@@ -847,8 +853,6 @@ static int __init imx_drm_init(void)
goto err_pdev;
}
- imx_drm_pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32),
-
ret = platform_driver_register(&imx_drm_pdrv);
if (ret)
goto err_pdrv;
diff --git a/drivers/staging/imx-drm/ipuv3-crtc.c b/drivers/staging/imx-drm/ipuv3-crtc.c
index 6fd37a7..9e73e8d 100644
--- a/drivers/staging/imx-drm/ipuv3-crtc.c
+++ b/drivers/staging/imx-drm/ipuv3-crtc.c
@@ -523,7 +523,9 @@ static int ipu_drm_probe(struct platform_device *pdev)
if (!pdata)
return -EINVAL;
- pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
+ ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
+ if (ret)
+ return ret;
ipu_crtc = devm_kzalloc(&pdev->dev, sizeof(*ipu_crtc), GFP_KERNEL);
if (!ipu_crtc)
--
1.7.4.4
^ permalink raw reply related
* [PATCH 39/51] DMA-API: others: use dma_set_coherent_mask()
From: Russell King @ 2013-09-19 23:11 UTC (permalink / raw)
To: alsa-devel, b43-dev, devel, devicetree, dri-devel, e1000-devel,
linux-arm-kernel, linux-crypto, linux-doc, linux-fbdev, linux-ide,
linux-media, linux-mmc, linux-nvme, linux-omap, linuxppc-dev,
linux-samsung-soc, linux-scsi, linux-tegra, linux-usb,
linux-wireless, netdev, Solarflare linux maintainers,
uclinux-dist-devel
Cc: Kukjin Kim, Joonyoung Shim, David Airlie, Seung-Woo Kim, Inki Dae,
Kyungmin Park, Tejun Heo
In-Reply-To: <20130919212235.GD12758@n2100.arm.linux.org.uk>
The correct way for a driver to specify the coherent DMA mask is
not to directly access the field in the struct device, but to use
dma_set_coherent_mask(). Only arch and bus code should access this
member directly.
Convert all direct write accesses to using the correct API.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
drivers/ata/pata_ixp4xx_cf.c | 5 ++++-
drivers/gpu/drm/exynos/exynos_drm_drv.c | 6 +++++-
drivers/gpu/drm/omapdrm/omap_dmm_tiler.c | 5 +++--
3 files changed, 12 insertions(+), 4 deletions(-)
diff --git a/drivers/ata/pata_ixp4xx_cf.c b/drivers/ata/pata_ixp4xx_cf.c
index 1ec53f8..ddf470c 100644
--- a/drivers/ata/pata_ixp4xx_cf.c
+++ b/drivers/ata/pata_ixp4xx_cf.c
@@ -144,6 +144,7 @@ static int ixp4xx_pata_probe(struct platform_device *pdev)
struct ata_host *host;
struct ata_port *ap;
struct ixp4xx_pata_data *data = dev_get_platdata(&pdev->dev);
+ int ret;
cs0 = platform_get_resource(pdev, IORESOURCE_MEM, 0);
cs1 = platform_get_resource(pdev, IORESOURCE_MEM, 1);
@@ -157,7 +158,9 @@ static int ixp4xx_pata_probe(struct platform_device *pdev)
return -ENOMEM;
/* acquire resources and fill host */
- pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
+ ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
+ if (ret)
+ return ret;
data->cs0 = devm_ioremap(&pdev->dev, cs0->start, 0x1000);
data->cs1 = devm_ioremap(&pdev->dev, cs1->start, 0x1000);
diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.c b/drivers/gpu/drm/exynos/exynos_drm_drv.c
index bb82ef7..81192d0 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_drv.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.c
@@ -286,7 +286,11 @@ static struct drm_driver exynos_drm_driver = {
static int exynos_drm_platform_probe(struct platform_device *pdev)
{
- pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
+ int ret;
+
+ ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
+ if (ret)
+ return ret;
return drm_platform_init(&exynos_drm_driver, pdev);
}
diff --git a/drivers/gpu/drm/omapdrm/omap_dmm_tiler.c b/drivers/gpu/drm/omapdrm/omap_dmm_tiler.c
index acf6678..701c4c1 100644
--- a/drivers/gpu/drm/omapdrm/omap_dmm_tiler.c
+++ b/drivers/gpu/drm/omapdrm/omap_dmm_tiler.c
@@ -664,8 +664,9 @@ static int omap_dmm_probe(struct platform_device *dev)
}
/* set dma mask for device */
- /* NOTE: this is a workaround for the hwmod not initializing properly */
- dev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
+ ret = dma_set_coherent_mask(&dev->dev, DMA_BIT_MASK(32));
+ if (ret)
+ goto fail;
omap_dmm->dummy_pa = page_to_phys(omap_dmm->dummy_page);
--
1.7.4.4
^ permalink raw reply related
* [PATCH 40/51] DMA-API: crypto: fix ixp4xx crypto platform device support
From: Russell King @ 2013-09-19 23:12 UTC (permalink / raw)
To: alsa-devel, b43-dev, devel, devicetree, dri-devel, e1000-devel,
linux-arm-kernel, linux-crypto, linux-doc, linux-fbdev, linux-ide,
linux-media, linux-mmc, linux-nvme, linux-omap, linuxppc-dev,
linux-samsung-soc, linux-scsi, linux-tegra, linux-usb,
linux-wireless, netdev, Solarflare linux maintainers,
uclinux-dist-devel
Cc: Herbert Xu, David S. Miller
In-Reply-To: <20130919212235.GD12758@n2100.arm.linux.org.uk>
Don't statically allocate struct device's in modules, and shut the
warning up with an empty release() function. There's a reason that
warning is there and that's not for people to hide in this way. It's
there to persuade people to use the correct APIs to allocate platform
devices.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
drivers/crypto/ixp4xx_crypto.c | 37 +++++++++++++++++--------------------
1 files changed, 17 insertions(+), 20 deletions(-)
diff --git a/drivers/crypto/ixp4xx_crypto.c b/drivers/crypto/ixp4xx_crypto.c
index 21180d6..8306185 100644
--- a/drivers/crypto/ixp4xx_crypto.c
+++ b/drivers/crypto/ixp4xx_crypto.c
@@ -218,23 +218,10 @@ static dma_addr_t crypt_phys;
static int support_aes = 1;
-static void dev_release(struct device *dev)
-{
- return;
-}
-
#define DRIVER_NAME "ixp4xx_crypto"
-static struct platform_device pseudo_dev = {
- .name = DRIVER_NAME,
- .id = 0,
- .num_resources = 0,
- .dev = {
- .coherent_dma_mask = DMA_BIT_MASK(32),
- .release = dev_release,
- }
-};
-static struct device *dev = &pseudo_dev.dev;
+static struct platform_device *pdev;
+static struct device *dev;
static inline dma_addr_t crypt_virt2phys(struct crypt_ctl *virt)
{
@@ -1418,20 +1405,30 @@ static struct ixp_alg ixp4xx_algos[] = {
} };
#define IXP_POSTFIX "-ixp4xx"
+
+static const struct platform_device_info ixp_dev_info __initdata = {
+ .name = DRIVER_NAME,
+ .id = 0,
+ .dma_mask = DMA_BIT_MASK(32),
+};
+
static int __init ixp_module_init(void)
{
int num = ARRAY_SIZE(ixp4xx_algos);
- int i,err ;
+ int i, err ;
- if (platform_device_register(&pseudo_dev))
- return -ENODEV;
+ pdev = platform_device_register_full(&ixp_dev_info);
+ if (IS_ERR(pdev))
+ return PTR_ERR(pdev);
+
+ dev = &pdev->dev;
spin_lock_init(&desc_lock);
spin_lock_init(&emerg_lock);
err = init_ixp_crypto();
if (err) {
- platform_device_unregister(&pseudo_dev);
+ platform_device_unregister(pdev);
return err;
}
for (i=0; i< num; i++) {
@@ -1496,7 +1493,7 @@ static void __exit ixp_module_exit(void)
crypto_unregister_alg(&ixp4xx_algos[i].crypto);
}
release_ixp_crypto();
- platform_device_unregister(&pseudo_dev);
+ platform_device_unregister(pdev);
}
module_init(ixp_module_init);
--
1.7.4.4
^ permalink raw reply related
* [PATCH 41/51] DMA-API: crypto: remove last references to 'static struct device *dev'
From: Russell King @ 2013-09-19 23:13 UTC (permalink / raw)
To: alsa-devel, b43-dev, devel, devicetree, dri-devel, e1000-devel,
linux-arm-kernel, linux-crypto, linux-doc, linux-fbdev, linux-ide,
linux-media, linux-mmc, linux-nvme, linux-omap, linuxppc-dev,
linux-samsung-soc, linux-scsi, linux-tegra, linux-usb,
linux-wireless, netdev, Solarflare linux maintainers,
uclinux-dist-devel
Cc: Herbert Xu, David S. Miller
In-Reply-To: <20130919212235.GD12758@n2100.arm.linux.org.uk>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
drivers/crypto/ixp4xx_crypto.c | 13 ++++++++-----
1 files changed, 8 insertions(+), 5 deletions(-)
diff --git a/drivers/crypto/ixp4xx_crypto.c b/drivers/crypto/ixp4xx_crypto.c
index 8306185..214357e 100644
--- a/drivers/crypto/ixp4xx_crypto.c
+++ b/drivers/crypto/ixp4xx_crypto.c
@@ -221,7 +221,6 @@ static int support_aes = 1;
#define DRIVER_NAME "ixp4xx_crypto"
static struct platform_device *pdev;
-static struct device *dev;
static inline dma_addr_t crypt_virt2phys(struct crypt_ctl *virt)
{
@@ -250,6 +249,7 @@ static inline const struct ix_hash_algo *ix_hash(struct crypto_tfm *tfm)
static int setup_crypt_desc(void)
{
+ struct device *dev = &pdev->dev;
BUILD_BUG_ON(sizeof(struct crypt_ctl) != 64);
crypt_virt = dma_alloc_coherent(dev,
NPE_QLEN * sizeof(struct crypt_ctl),
@@ -350,6 +350,7 @@ static void finish_scattered_hmac(struct crypt_ctl *crypt)
static void one_packet(dma_addr_t phys)
{
+ struct device *dev = &pdev->dev;
struct crypt_ctl *crypt;
struct ixp_ctx *ctx;
int failed;
@@ -419,7 +420,7 @@ static void crypto_done_action(unsigned long arg)
tasklet_schedule(&crypto_done_tasklet);
}
-static int init_ixp_crypto(void)
+static int init_ixp_crypto(struct device *dev)
{
int ret = -ENODEV;
u32 msg[2] = { 0, 0 };
@@ -506,7 +507,7 @@ static int init_ixp_crypto(void)
return ret;
}
-static void release_ixp_crypto(void)
+static void release_ixp_crypto(struct device *dev)
{
qmgr_disable_irq(RECV_QID);
tasklet_kill(&crypto_done_tasklet);
@@ -873,6 +874,7 @@ static int ablk_perform(struct ablkcipher_request *req, int encrypt)
enum dma_data_direction src_direction = DMA_BIDIRECTIONAL;
struct ablk_ctx *req_ctx = ablkcipher_request_ctx(req);
struct buffer_desc src_hook;
+ struct device *dev = &pdev->dev;
gfp_t flags = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ?
GFP_KERNEL : GFP_ATOMIC;
@@ -997,6 +999,7 @@ static int aead_perform(struct aead_request *req, int encrypt,
unsigned int cryptlen;
struct buffer_desc *buf, src_hook;
struct aead_ctx *req_ctx = aead_request_ctx(req);
+ struct device *dev = &pdev->dev;
gfp_t flags = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ?
GFP_KERNEL : GFP_ATOMIC;
@@ -1426,7 +1429,7 @@ static int __init ixp_module_init(void)
spin_lock_init(&desc_lock);
spin_lock_init(&emerg_lock);
- err = init_ixp_crypto();
+ err = init_ixp_crypto(&pdev->dev);
if (err) {
platform_device_unregister(pdev);
return err;
@@ -1492,7 +1495,7 @@ static void __exit ixp_module_exit(void)
if (ixp4xx_algos[i].registered)
crypto_unregister_alg(&ixp4xx_algos[i].crypto);
}
- release_ixp_crypto();
+ release_ixp_crypto(&pdev->dev);
platform_device_unregister(pdev);
}
--
1.7.4.4
^ permalink raw reply related
* [PATCH 42/51] DMA-API: usb: musb: use platform_device_register_full() to avoid directly
From: Russell King @ 2013-09-19 23:14 UTC (permalink / raw)
To: alsa-devel, b43-dev, devel, devicetree, dri-devel, e1000-devel,
linux-arm-kernel, linux-crypto, linux-doc, linux-fbdev, linux-ide,
linux-media, linux-mmc, linux-nvme, linux-omap, linuxppc-dev,
linux-samsung-soc, linux-scsi, linux-tegra, linux-usb,
linux-wireless, netdev, Solarflare linux maintainers,
uclinux-dist-devel
Cc: Greg Kroah-Hartman, Felipe Balbi
In-Reply-To: <20130919212235.GD12758@n2100.arm.linux.org.uk>
Use platform_device_register_full() for those drivers which can, to
avoid messing directly with DMA masks. This can only be done when
the driver does not need to access the allocated musb platform device
from within its callbacks, which may be called during the musb
device probing.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
drivers/usb/musb/am35x.c | 50 ++++++++++++++----------------------------
drivers/usb/musb/da8xx.c | 49 ++++++++++++++---------------------------
drivers/usb/musb/davinci.c | 48 ++++++++++++++--------------------------
drivers/usb/musb/tusb6010.c | 49 ++++++++++++++---------------------------
4 files changed, 68 insertions(+), 128 deletions(-)
diff --git a/drivers/usb/musb/am35x.c b/drivers/usb/musb/am35x.c
index 5c310c6..790b22b 100644
--- a/drivers/usb/musb/am35x.c
+++ b/drivers/usb/musb/am35x.c
@@ -89,7 +89,6 @@ struct am35x_glue {
struct clk *phy_clk;
struct clk *clk;
};
-#define glue_to_musb(g) platform_get_drvdata(g->musb)
/*
* am35x_musb_enable - enable interrupts
@@ -452,14 +451,18 @@ static const struct musb_platform_ops am35x_ops = {
.set_vbus = am35x_musb_set_vbus,
};
-static u64 am35x_dmamask = DMA_BIT_MASK(32);
+static const struct platform_device_info am35x_dev_info = {
+ .name = "musb-hdrc",
+ .id = PLATFORM_DEVID_AUTO,
+ .dma_mask = DMA_BIT_MASK(32),
+};
static int am35x_probe(struct platform_device *pdev)
{
struct musb_hdrc_platform_data *pdata = dev_get_platdata(&pdev->dev);
struct platform_device *musb;
struct am35x_glue *glue;
-
+ struct platform_device_info pinfo;
struct clk *phy_clk;
struct clk *clk;
@@ -471,12 +474,6 @@ static int am35x_probe(struct platform_device *pdev)
goto err0;
}
- musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO);
- if (!musb) {
- dev_err(&pdev->dev, "failed to allocate musb device\n");
- goto err1;
- }
-
phy_clk = clk_get(&pdev->dev, "fck");
if (IS_ERR(phy_clk)) {
dev_err(&pdev->dev, "failed to get PHY clock\n");
@@ -503,12 +500,7 @@ static int am35x_probe(struct platform_device *pdev)
goto err6;
}
- musb->dev.parent = &pdev->dev;
- musb->dev.dma_mask = &am35x_dmamask;
- musb->dev.coherent_dma_mask = am35x_dmamask;
-
glue->dev = &pdev->dev;
- glue->musb = musb;
glue->phy_clk = phy_clk;
glue->clk = clk;
@@ -516,22 +508,17 @@ static int am35x_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, glue);
- ret = platform_device_add_resources(musb, pdev->resource,
- pdev->num_resources);
- if (ret) {
- dev_err(&pdev->dev, "failed to add resources\n");
- goto err7;
- }
-
- ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
- if (ret) {
- dev_err(&pdev->dev, "failed to add platform_data\n");
- goto err7;
- }
-
- ret = platform_device_add(musb);
- if (ret) {
- dev_err(&pdev->dev, "failed to register musb device\n");
+ pinfo = am35x_dev_info;
+ pinfo.parent = &pdev->dev;
+ pinfo.res = pdev->resource;
+ pinfo.num_res = pdev->num_resources;
+ pinfo.data = pdata;
+ pinfo.size_data = sizeof(*pdata);
+
+ glue->musb = musb = platform_device_register_full(&pinfo);
+ if (IS_ERR(musb)) {
+ ret = PTR_ERR(musb);
+ dev_err(&pdev->dev, "failed to register musb device: %d\n", ret);
goto err7;
}
@@ -550,9 +537,6 @@ static int am35x_probe(struct platform_device *pdev)
clk_put(phy_clk);
err3:
- platform_device_put(musb);
-
-err1:
kfree(glue);
err0:
diff --git a/drivers/usb/musb/da8xx.c b/drivers/usb/musb/da8xx.c
index d9ddf41..2f2c1cb 100644
--- a/drivers/usb/musb/da8xx.c
+++ b/drivers/usb/musb/da8xx.c
@@ -472,7 +472,11 @@ static const struct musb_platform_ops da8xx_ops = {
.set_vbus = da8xx_musb_set_vbus,
};
-static u64 da8xx_dmamask = DMA_BIT_MASK(32);
+static const struct platform_device_info da8xx_dev_info = {
+ .name = "musb-hdrc",
+ .id = PLATFORM_DEVID_AUTO,
+ .dma_mask = DMA_BIT_MASK(32),
+};
static int da8xx_probe(struct platform_device *pdev)
{
@@ -480,7 +484,7 @@ static int da8xx_probe(struct platform_device *pdev)
struct musb_hdrc_platform_data *pdata = dev_get_platdata(&pdev->dev);
struct platform_device *musb;
struct da8xx_glue *glue;
-
+ struct platform_device_info pinfo;
struct clk *clk;
int ret = -ENOMEM;
@@ -491,12 +495,6 @@ static int da8xx_probe(struct platform_device *pdev)
goto err0;
}
- musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO);
- if (!musb) {
- dev_err(&pdev->dev, "failed to allocate musb device\n");
- goto err1;
- }
-
clk = clk_get(&pdev->dev, "usb20");
if (IS_ERR(clk)) {
dev_err(&pdev->dev, "failed to get clock\n");
@@ -510,12 +508,7 @@ static int da8xx_probe(struct platform_device *pdev)
goto err4;
}
- musb->dev.parent = &pdev->dev;
- musb->dev.dma_mask = &da8xx_dmamask;
- musb->dev.coherent_dma_mask = da8xx_dmamask;
-
glue->dev = &pdev->dev;
- glue->musb = musb;
glue->clk = clk;
pdata->platform_ops = &da8xx_ops;
@@ -535,22 +528,17 @@ static int da8xx_probe(struct platform_device *pdev)
musb_resources[1].end = pdev->resource[1].end;
musb_resources[1].flags = pdev->resource[1].flags;
- ret = platform_device_add_resources(musb, musb_resources,
- ARRAY_SIZE(musb_resources));
- if (ret) {
- dev_err(&pdev->dev, "failed to add resources\n");
- goto err5;
- }
-
- ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
- if (ret) {
- dev_err(&pdev->dev, "failed to add platform_data\n");
- goto err5;
- }
-
- ret = platform_device_add(musb);
- if (ret) {
- dev_err(&pdev->dev, "failed to register musb device\n");
+ pinfo = da8xx_dev_info;
+ pinfo.parent = &pdev->dev;
+ pinfo.res = musb_resources;
+ pinfo.num_res = ARRAY_SIZE(musb_resources);
+ pinfo.data = pdata;
+ pinfo.size_data = sizeof(*pdata);
+
+ glue->musb = musb = platform_device_register_full(&pinfo);
+ if (IS_ERR(musb)) {
+ ret = PTR_ERR(musb);
+ dev_err(&pdev->dev, "failed to register musb device: %d\n", ret);
goto err5;
}
@@ -563,9 +551,6 @@ static int da8xx_probe(struct platform_device *pdev)
clk_put(clk);
err3:
- platform_device_put(musb);
-
-err1:
kfree(glue);
err0:
diff --git a/drivers/usb/musb/davinci.c b/drivers/usb/musb/davinci.c
index ed0834e..45aae0b 100644
--- a/drivers/usb/musb/davinci.c
+++ b/drivers/usb/musb/davinci.c
@@ -505,7 +505,11 @@ static const struct musb_platform_ops davinci_ops = {
.set_vbus = davinci_musb_set_vbus,
};
-static u64 davinci_dmamask = DMA_BIT_MASK(32);
+static const struct platform_device_info davinci_dev_info = {
+ .name = "musb-hdrc",
+ .id = PLATFORM_DEVID_AUTO,
+ .dma_mask = DMA_BIT_MASK(32),
+};
static int davinci_probe(struct platform_device *pdev)
{
@@ -513,6 +517,7 @@ static int davinci_probe(struct platform_device *pdev)
struct musb_hdrc_platform_data *pdata = dev_get_platdata(&pdev->dev);
struct platform_device *musb;
struct davinci_glue *glue;
+ struct platform_device_info pinfo;
struct clk *clk;
int ret = -ENOMEM;
@@ -523,12 +528,6 @@ static int davinci_probe(struct platform_device *pdev)
goto err0;
}
- musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO);
- if (!musb) {
- dev_err(&pdev->dev, "failed to allocate musb device\n");
- goto err1;
- }
-
clk = clk_get(&pdev->dev, "usb");
if (IS_ERR(clk)) {
dev_err(&pdev->dev, "failed to get clock\n");
@@ -542,12 +541,7 @@ static int davinci_probe(struct platform_device *pdev)
goto err4;
}
- musb->dev.parent = &pdev->dev;
- musb->dev.dma_mask = &davinci_dmamask;
- musb->dev.coherent_dma_mask = davinci_dmamask;
-
glue->dev = &pdev->dev;
- glue->musb = musb;
glue->clk = clk;
pdata->platform_ops = &davinci_ops;
@@ -567,22 +561,17 @@ static int davinci_probe(struct platform_device *pdev)
musb_resources[1].end = pdev->resource[1].end;
musb_resources[1].flags = pdev->resource[1].flags;
- ret = platform_device_add_resources(musb, musb_resources,
- ARRAY_SIZE(musb_resources));
- if (ret) {
- dev_err(&pdev->dev, "failed to add resources\n");
- goto err5;
- }
-
- ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
- if (ret) {
- dev_err(&pdev->dev, "failed to add platform_data\n");
- goto err5;
- }
-
- ret = platform_device_add(musb);
- if (ret) {
- dev_err(&pdev->dev, "failed to register musb device\n");
+ pinfo = davinci_dev_info;
+ pinfo.parent = &pdev->dev;
+ pinfo.res = musb_resources;
+ pinfo.num_res = ARRAY_SIZE(musb_resources);
+ pinfo.data = pdata;
+ pinfo.size_data = sizeof(*pdata);
+
+ glue->musb = musb = platform_device_register_full(&pinfo);
+ if (IS_ERR(musb)) {
+ ret = PTR_ERR(musb);
+ dev_err(&pdev->dev, "failed to register musb device: %d\n", ret);
goto err5;
}
@@ -595,9 +584,6 @@ static int davinci_probe(struct platform_device *pdev)
clk_put(clk);
err3:
- platform_device_put(musb);
-
-err1:
kfree(glue);
err0:
diff --git a/drivers/usb/musb/tusb6010.c b/drivers/usb/musb/tusb6010.c
index b3b3ed7..4432314 100644
--- a/drivers/usb/musb/tusb6010.c
+++ b/drivers/usb/musb/tusb6010.c
@@ -1152,7 +1152,11 @@ static const struct musb_platform_ops tusb_ops = {
.set_vbus = tusb_musb_set_vbus,
};
-static u64 tusb_dmamask = DMA_BIT_MASK(32);
+static const struct platform_device_info tusb_dev_info = {
+ .name = "musb-hdrc",
+ .id = PLATFORM_DEVID_AUTO,
+ .dma_mask = DMA_BIT_MASK(32),
+};
static int tusb_probe(struct platform_device *pdev)
{
@@ -1160,7 +1164,7 @@ static int tusb_probe(struct platform_device *pdev)
struct musb_hdrc_platform_data *pdata = dev_get_platdata(&pdev->dev);
struct platform_device *musb;
struct tusb6010_glue *glue;
-
+ struct platform_device_info pinfo;
int ret = -ENOMEM;
glue = kzalloc(sizeof(*glue), GFP_KERNEL);
@@ -1169,18 +1173,7 @@ static int tusb_probe(struct platform_device *pdev)
goto err0;
}
- musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO);
- if (!musb) {
- dev_err(&pdev->dev, "failed to allocate musb device\n");
- goto err1;
- }
-
- musb->dev.parent = &pdev->dev;
- musb->dev.dma_mask = &tusb_dmamask;
- musb->dev.coherent_dma_mask = tusb_dmamask;
-
glue->dev = &pdev->dev;
- glue->musb = musb;
pdata->platform_ops = &tusb_ops;
@@ -1204,31 +1197,23 @@ static int tusb_probe(struct platform_device *pdev)
musb_resources[2].end = pdev->resource[2].end;
musb_resources[2].flags = pdev->resource[2].flags;
- ret = platform_device_add_resources(musb, musb_resources,
- ARRAY_SIZE(musb_resources));
- if (ret) {
- dev_err(&pdev->dev, "failed to add resources\n");
- goto err3;
- }
-
- ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
- if (ret) {
- dev_err(&pdev->dev, "failed to add platform_data\n");
- goto err3;
- }
-
- ret = platform_device_add(musb);
- if (ret) {
- dev_err(&pdev->dev, "failed to register musb device\n");
+ pinfo = tusb_dev_info;
+ pinfo.parent = &pdev->dev;
+ pinfo.res = musb_resources;
+ pinfo.num_res = ARRAY_SIZE(musb_resources);
+ pinfo.data = pdata;
+ pinfo.size_data = sizeof(*pdata);
+
+ glue->musb = musb = platform_device_register_full(&pinfo);
+ if (IS_ERR(musb)) {
+ ret = PTR_ERR(musb);
+ dev_err(&pdev->dev, "failed to register musb device: %d\n", ret);
goto err3;
}
return 0;
err3:
- platform_device_put(musb);
-
-err1:
kfree(glue);
err0:
--
1.7.4.4
^ permalink raw reply related
* [PATCH 43/51] DMA-API: dma: edma.c: no need to explicitly initialize DMA masks
From: Russell King @ 2013-09-19 23:15 UTC (permalink / raw)
To: alsa-devel-K7yf7f+aM1XWsZ/bQMPhNw,
b43-dev-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
devel-gWbeCf7V1WCQmaza687I9mD2FQJk+8+b,
devicetree-u79uwXL29TY76Z2rM5mHXA,
dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW,
e1000-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
linux-crypto-u79uwXL29TY76Z2rM5mHXA,
linux-doc-u79uwXL29TY76Z2rM5mHXA,
linux-fbdev-u79uwXL29TY76Z2rM5mHXA,
linux-ide-u79uwXL29TY76Z2rM5mHXA,
linux-media-u79uwXL29TY76Z2rM5mHXA,
linux-mmc-u79uwXL29TY76Z2rM5mHXA,
linux-nvme-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
linux-omap-u79uwXL29TY76Z2rM5mHXA,
linuxppc-dev-uLR06cmDAlY/bJ5BZ2RsiQ,
linux-samsung-soc-u79uwXL29TY76Z2rM5mHXA,
linux-scsi-u79uwXL29TY76Z2rM5mHXA,
linux-tegra-u79uwXL29TY76Z2rM5mHXA,
linux-usb-u79uwXL29TY76Z2rM5mHXA,
linux-wireless-u79uwXL29TY76Z2rM5mHXA,
netdev-u79uwXL29TY76Z2rM5mHXA, Solarflare linux maintainers,
uclinux-dist-devel-ZG0+EudsQA8dtHy/vicBwGD2FQJk+8+b
Cc: Vinod Koul, Dan Williams
In-Reply-To: <20130919212235.GD12758-l+eeeJia6m9vn6HldHNs0ANdhmdF6hFW@public.gmane.org>
register_platform_device_full() can setup the DMA mask provided the
appropriate member is set in struct platform_device_info. So lets
make that be the case. This avoids a direct reference to the DMA
masks by this driver.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
drivers/dma/edma.c | 6 ++----
1 files changed, 2 insertions(+), 4 deletions(-)
diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c
index ff50ff4..7f9fe30 100644
--- a/drivers/dma/edma.c
+++ b/drivers/dma/edma.c
@@ -702,11 +702,13 @@ static struct platform_device *pdev0, *pdev1;
static const struct platform_device_info edma_dev_info0 = {
.name = "edma-dma-engine",
.id = 0,
+ .dma_mask = DMA_BIT_MASK(32),
};
static const struct platform_device_info edma_dev_info1 = {
.name = "edma-dma-engine",
.id = 1,
+ .dma_mask = DMA_BIT_MASK(32),
};
static int edma_init(void)
@@ -720,8 +722,6 @@ static int edma_init(void)
ret = PTR_ERR(pdev0);
goto out;
}
- pdev0->dev.dma_mask = &pdev0->dev.coherent_dma_mask;
- pdev0->dev.coherent_dma_mask = DMA_BIT_MASK(32);
}
if (EDMA_CTLRS = 2) {
@@ -731,8 +731,6 @@ static int edma_init(void)
platform_device_unregister(pdev0);
ret = PTR_ERR(pdev1);
}
- pdev1->dev.dma_mask = &pdev1->dev.coherent_dma_mask;
- pdev1->dev.coherent_dma_mask = DMA_BIT_MASK(32);
}
out:
--
1.7.4.4
^ permalink raw reply related
* [PATCH 44/51] DMA-API: dcdbas: update DMA mask handing
From: Russell King @ 2013-09-19 23:16 UTC (permalink / raw)
To: alsa-devel-K7yf7f+aM1XWsZ/bQMPhNw,
b43-dev-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
devel-gWbeCf7V1WCQmaza687I9mD2FQJk+8+b,
devicetree-u79uwXL29TY76Z2rM5mHXA,
dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW,
e1000-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
linux-crypto-u79uwXL29TY76Z2rM5mHXA,
linux-doc-u79uwXL29TY76Z2rM5mHXA,
linux-fbdev-u79uwXL29TY76Z2rM5mHXA,
linux-ide-u79uwXL29TY76Z2rM5mHXA,
linux-media-u79uwXL29TY76Z2rM5mHXA,
linux-mmc-u79uwXL29TY76Z2rM5mHXA,
linux-nvme-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
linux-omap-u79uwXL29TY76Z2rM5mHXA,
linuxppc-dev-uLR06cmDAlY/bJ5BZ2RsiQ,
linux-samsung-soc-u79uwXL29TY76Z2rM5mHXA,
linux-scsi-u79uwXL29TY76Z2rM5mHXA,
linux-tegra-u79uwXL29TY76Z2rM5mHXA,
linux-usb-u79uwXL29TY76Z2rM5mHXA,
linux-wireless-u79uwXL29TY76Z2rM5mHXA,
netdev-u79uwXL29TY76Z2rM5mHXA, Solarflare linux maintainers,
uclinux-dist-devel-ZG0+EudsQA8dtHy/vicBwGD2FQJk+8+b
Cc: Doug Warzecha
In-Reply-To: <20130919212235.GD12758-l+eeeJia6m9vn6HldHNs0ANdhmdF6hFW@public.gmane.org>
dcdbas was explicitly initializing DMA masks thusly:
dcdbas_pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
dcdbas_pdev->dev.dma_mask = &dcdbas_pdev->dev.coherent_dma_mask;
which bypasses the architecture check. Moreover, it is creating the
dcdbas_pdev device itself, and using the platform_device_register_full()
avoids some of this explicit initialization.
Convert the driver to use platform_device_register_full(), and as it
makes use of coherent DMA, also call dma_set_coherent_mask() to ensure
that the architecture gets to check the mask.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
drivers/firmware/dcdbas.c | 23 ++++++++++++-----------
1 files changed, 12 insertions(+), 11 deletions(-)
diff --git a/drivers/firmware/dcdbas.c b/drivers/firmware/dcdbas.c
index ff080ee..a85fda2 100644
--- a/drivers/firmware/dcdbas.c
+++ b/drivers/firmware/dcdbas.c
@@ -549,8 +549,9 @@ static int dcdbas_probe(struct platform_device *dev)
* BIOS SMI calls require buffer addresses be in 32-bit address space.
* This is done by setting the DMA mask below.
*/
- dcdbas_pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
- dcdbas_pdev->dev.dma_mask = &dcdbas_pdev->dev.coherent_dma_mask;
+ error = dma_set_coherent_mask(&dcdbas_pdev->dev, DMA_BIT_MASK(32));
+ if (error)
+ return error;
error = sysfs_create_group(&dev->dev.kobj, &dcdbas_attr_group);
if (error)
@@ -581,6 +582,12 @@ static struct platform_driver dcdbas_driver = {
.remove = dcdbas_remove,
};
+static const struct platform_device_info dcdbas_dev_info __initdata = {
+ .name = DRIVER_NAME,
+ .id = -1,
+ .dma_mask = DMA_BIT_MASK(32),
+};
+
/**
* dcdbas_init: initialize driver
*/
@@ -592,20 +599,14 @@ static int __init dcdbas_init(void)
if (error)
return error;
- dcdbas_pdev = platform_device_alloc(DRIVER_NAME, -1);
- if (!dcdbas_pdev) {
- error = -ENOMEM;
+ dcdbas_pdev = platform_device_register_full(&dcdbas_dev_info);
+ if (IS_ERR(dcdbas_pdev)) {
+ error = PTR_ERR(dcdbas_pdev);
goto err_unregister_driver;
}
- error = platform_device_add(dcdbas_pdev);
- if (error)
- goto err_free_device;
-
return 0;
- err_free_device:
- platform_device_put(dcdbas_pdev);
err_unregister_driver:
platform_driver_unregister(&dcdbas_driver);
return error;
--
1.7.4.4
^ permalink raw reply related
* [PATCH 45/51] DMA-API: firmware/google/gsmi.c: avoid direct access to DMA masks
From: Russell King @ 2013-09-19 23:17 UTC (permalink / raw)
To: alsa-devel, b43-dev, devel, devicetree, dri-devel, e1000-devel,
linux-arm-kernel, linux-crypto, linux-doc, linux-fbdev, linux-ide,
linux-media, linux-mmc, linux-nvme, linux-omap, linuxppc-dev,
linux-samsung-soc, linux-scsi, linux-tegra, linux-usb,
linux-wireless, netdev, Solarflare linux maintainers,
uclinux-dist-devel
In-Reply-To: <20130919212235.GD12758@n2100.arm.linux.org.uk>
This driver doesn't need to directly access DMA masks if it uses the
platform_device_register_full() API rather than
platform_device_register_simple() - the former function can initialize
the DMA mask appropriately.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
drivers/firmware/google/gsmi.c | 13 ++++++++-----
1 files changed, 8 insertions(+), 5 deletions(-)
diff --git a/drivers/firmware/google/gsmi.c b/drivers/firmware/google/gsmi.c
index 6eb535f..e5a67b2 100644
--- a/drivers/firmware/google/gsmi.c
+++ b/drivers/firmware/google/gsmi.c
@@ -764,6 +764,13 @@ static __init int gsmi_system_valid(void)
static struct kobject *gsmi_kobj;
static struct efivars efivars;
+static const struct platform_device_info gsmi_dev_info = {
+ .name = "gsmi",
+ .id = -1,
+ /* SMI callbacks require 32bit addresses */
+ .dma_mask = DMA_BIT_MASK(32),
+};
+
static __init int gsmi_init(void)
{
unsigned long flags;
@@ -776,7 +783,7 @@ static __init int gsmi_init(void)
gsmi_dev.smi_cmd = acpi_gbl_FADT.smi_command;
/* register device */
- gsmi_dev.pdev = platform_device_register_simple("gsmi", -1, NULL, 0);
+ gsmi_dev.pdev = platform_device_register_full(&gsmi_dev_info);
if (IS_ERR(gsmi_dev.pdev)) {
printk(KERN_ERR "gsmi: unable to register platform device\n");
return PTR_ERR(gsmi_dev.pdev);
@@ -785,10 +792,6 @@ static __init int gsmi_init(void)
/* SMI access needs to be serialized */
spin_lock_init(&gsmi_dev.lock);
- /* SMI callbacks require 32bit addresses */
- gsmi_dev.pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
- gsmi_dev.pdev->dev.dma_mask - &gsmi_dev.pdev->dev.coherent_dma_mask;
ret = -ENOMEM;
gsmi_dev.dma_pool = dma_pool_create("gsmi", &gsmi_dev.pdev->dev,
GSMI_BUF_SIZE, GSMI_BUF_ALIGN, 0);
--
1.7.4.4
^ permalink raw reply related
* [PATCH 46/51] ARM: DMA-API: better handing of DMA masks for coherent allocations
From: Russell King @ 2013-09-19 23:39 UTC (permalink / raw)
To: alsa-devel, b43-dev, devel, devicetree, dri-devel, e1000-devel,
linux-arm-kernel, linux-crypto, linux-doc, linux-fbdev, linux-ide,
linux-media, linux-mmc, linux-nvme, linux-omap, linuxppc-dev,
linux-samsung-soc, linux-scsi, linux-tegra, linux-usb,
linux-wireless, netdev, Solarflare linux maintainers,
uclinux-dist-devel
In-Reply-To: <20130919212235.GD12758@n2100.arm.linux.org.uk>
We need to start treating DMA masks as something which is specific to
the bus that the device resides on, otherwise we're going to hit all
sorts of nasty issues with LPAE and 32-bit DMA controllers in >32-bit
systems, where memory is offset from PFN 0.
In order to start doing this, we convert the DMA mask to a PFN using
the device specific dma_to_pfn() macro. This is the reverse of the
pfn_to_dma() macro which is used to get the DMA address for the device.
This gives us a PFN mask, which we can then check against the PFN
limit of the DMA zone.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
arch/arm/mm/dma-mapping.c | 49 ++++++++++++++++++++++++++++++++++++++++----
arch/arm/mm/init.c | 2 +
arch/arm/mm/mm.h | 2 +
3 files changed, 48 insertions(+), 5 deletions(-)
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index f5e1a84..13d55e1 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -173,10 +173,30 @@ static u64 get_coherent_dma_mask(struct device *dev)
return 0;
}
- if ((~mask) & (u64)arm_dma_limit) {
- dev_warn(dev, "coherent DMA mask %#llx is smaller "
- "than system GFP_DMA mask %#llx\n",
- mask, (u64)arm_dma_limit);
+ /*
+ * If the mask allows for more memory than we can address,
+ * and we actually have that much memory, then fail the
+ * allocation.
+ */
+ if (sizeof(mask) != sizeof(dma_addr_t) &&
+ mask > (dma_addr_t)~0 &&
+ dma_to_pfn(dev, ~0) > arm_dma_pfn_limit) {
+ dev_warn(dev, "Coherent DMA mask %#llx is larger than dma_addr_t allows\n",
+ mask);
+ dev_warn(dev, "Driver did not use or check the return value from dma_set_coherent_mask()?\n");
+ return 0;
+ }
+
+ /*
+ * Now check that the mask, when translated to a PFN,
+ * fits within the allowable addresses which we can
+ * allocate.
+ */
+ if (dma_to_pfn(dev, mask) < arm_dma_pfn_limit) {
+ dev_warn(dev, "Coherent DMA mask %#llx (pfn %#lx-%#lx) covers a smaller range of system memory than the DMA zone pfn 0x0-%#lx\n",
+ mask,
+ dma_to_pfn(dev, 0), dma_to_pfn(dev, mask) + 1,
+ arm_dma_pfn_limit + 1);
return 0;
}
}
@@ -1007,8 +1027,27 @@ void arm_dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
*/
int dma_supported(struct device *dev, u64 mask)
{
- if (mask < (u64)arm_dma_limit)
+ unsigned long limit;
+
+ /*
+ * If the mask allows for more memory than we can address,
+ * and we actually have that much memory, then we must
+ * indicate that DMA to this device is not supported.
+ */
+ if (sizeof(mask) != sizeof(dma_addr_t) &&
+ mask > (dma_addr_t)~0 &&
+ dma_to_pfn(dev, ~0) > arm_dma_pfn_limit)
+ return 0;
+
+ /*
+ * Translate the device's DMA mask to a PFN limit. This
+ * PFN number includes the page which we can DMA to.
+ */
+ limit = dma_to_pfn(dev, mask);
+
+ if (limit < arm_dma_pfn_limit)
return 0;
+
return 1;
}
EXPORT_SYMBOL(dma_supported);
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index febaee7..8aab24f 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -218,6 +218,7 @@ EXPORT_SYMBOL(arm_dma_zone_size);
* so a successful GFP_DMA allocation will always satisfy this.
*/
phys_addr_t arm_dma_limit;
+unsigned long arm_dma_pfn_limit;
static void __init arm_adjust_dma_zone(unsigned long *size, unsigned long *hole,
unsigned long dma_size)
@@ -240,6 +241,7 @@ void __init setup_dma_zone(const struct machine_desc *mdesc)
arm_dma_limit = PHYS_OFFSET + arm_dma_zone_size - 1;
} else
arm_dma_limit = 0xffffffff;
+ arm_dma_pfn_limit = arm_dma_limit >> PAGE_SHIFT;
#endif
}
diff --git a/arch/arm/mm/mm.h b/arch/arm/mm/mm.h
index d5a4e9a..d5a982d 100644
--- a/arch/arm/mm/mm.h
+++ b/arch/arm/mm/mm.h
@@ -81,8 +81,10 @@ extern __init void add_static_vm_early(struct static_vm *svm);
#ifdef CONFIG_ZONE_DMA
extern phys_addr_t arm_dma_limit;
+extern unsigned long arm_dma_pfn_limit;
#else
#define arm_dma_limit ((phys_addr_t)~0)
+#define arm_dma_pfn_limit (~0ul >> PAGE_SHIFT)
#endif
extern phys_addr_t arm_lowmem_limit;
--
1.7.4.4
^ permalink raw reply related
* [PATCH 47/51] ARM: 7794/1: block: Rename parameter dma_mask to max_addr for blk_queue_bounce_limit()
From: Russell King @ 2013-09-19 23:40 UTC (permalink / raw)
To: alsa-devel, b43-dev, devel, devicetree, dri-devel, e1000-devel,
linux-arm-kernel, linux-crypto, linux-doc, linux-fbdev, linux-ide,
linux-media, linux-mmc, linux-nvme, linux-omap, linuxppc-dev,
linux-samsung-soc, linux-scsi, linux-tegra, linux-usb,
linux-wireless, netdev, Solarflare linux maintainers,
uclinux-dist-devel
Cc: Jens Axboe
In-Reply-To: <20130919212235.GD12758@n2100.arm.linux.org.uk>
From: Santosh Shilimkar <santosh.shilimkar@ti.com>
The blk_queue_bounce_limit() API parameter 'dma_mask' is actually the
maximum address the device can handle rather than a dma_mask. Rename
it accordingly to avoid it being interpreted as dma_mask.
No functional change.
The idea is to fix the bad assumptions about dma_mask wherever it could
be miss-interpreted.
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
block/blk-settings.c | 8 ++++----
1 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/block/blk-settings.c b/block/blk-settings.c
index c50ecf0..026c151 100644
--- a/block/blk-settings.c
+++ b/block/blk-settings.c
@@ -195,17 +195,17 @@ EXPORT_SYMBOL(blk_queue_make_request);
/**
* blk_queue_bounce_limit - set bounce buffer limit for queue
* @q: the request queue for the device
- * @dma_mask: the maximum address the device can handle
+ * @max_addr: the maximum address the device can handle
*
* Description:
* Different hardware can have different requirements as to what pages
* it can do I/O directly to. A low level driver can call
* blk_queue_bounce_limit to have lower memory pages allocated as bounce
- * buffers for doing I/O to pages residing above @dma_mask.
+ * buffers for doing I/O to pages residing above @max_addr.
**/
-void blk_queue_bounce_limit(struct request_queue *q, u64 dma_mask)
+void blk_queue_bounce_limit(struct request_queue *q, u64 max_addr)
{
- unsigned long b_pfn = dma_mask >> PAGE_SHIFT;
+ unsigned long b_pfn = max_addr >> PAGE_SHIFT;
int dma = 0;
q->bounce_gfp = GFP_NOIO;
--
1.7.4.4
^ permalink raw reply related
* [PATCH 48/51] ARM: 7795/1: mm: dma-mapping: Add dma_max_pfn(dev) helper function
From: Russell King @ 2013-09-19 23:41 UTC (permalink / raw)
To: alsa-devel, b43-dev, devel, devicetree, dri-devel, e1000-devel,
linux-arm-kernel, linux-crypto, linux-doc, linux-fbdev, linux-ide,
linux-media, linux-mmc, linux-nvme, linux-omap, linuxppc-dev,
linux-samsung-soc, linux-scsi, linux-tegra, linux-usb,
linux-wireless, netdev, Solarflare linux maintainers,
uclinux-dist-devel
Cc: Vinod Koul, Jens Axboe, Dan Williams
In-Reply-To: <20130919212235.GD12758@n2100.arm.linux.org.uk>
From: Santosh Shilimkar <santosh.shilimkar@ti.com>
Most of the kernel assumes that PFN0 is the start of the physical
memory (RAM). This assumptions is not true on most of the ARM SOCs
and hence and if one try to update the ARM port to follow the assumptions,
we end of breaking the dma bounce limit for few block layer drivers.
One such example is trying to unify the meaning of max*_pfn on ARM
as the bootmem layer expects, breaks few block layer driver dma
bounce limit.
To fix this problem, we introduce dma_max_pfn(dev) generic helper with
a possibility of override from the architecture code. The helper converts
a DMA bitmask of bits to a block PFN number. In all the generic cases,
it is just "dev->dma_mask >> PAGE_SHIFT" and hence default behavior
is maintained as is.
Subsequent patches will make use of the helper. No functional change.
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
include/linux/dma-mapping.h | 7 +++++++
1 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index 27d1421..fd4aee2 100644
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -153,6 +153,13 @@ static inline int dma_set_seg_boundary(struct device *dev, unsigned long mask)
return -EIO;
}
+#ifndef dma_max_pfn
+static inline unsigned long dma_max_pfn(struct device *dev)
+{
+ return *dev->dma_mask >> PAGE_SHIFT;
+}
+#endif
+
static inline void *dma_zalloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t flag)
{
--
1.7.4.4
^ permalink raw reply related
* [PATCH 49/51] ARM: 7796/1: scsi: Use dma_max_pfn(dev) helper for bounce_limit calculations
From: Russell King @ 2013-09-19 23:42 UTC (permalink / raw)
To: alsa-devel, b43-dev, devel, devicetree, dri-devel, e1000-devel,
linux-arm-kernel, linux-crypto, linux-doc, linux-fbdev, linux-ide,
linux-media, linux-mmc, linux-nvme, linux-omap, linuxppc-dev,
linux-samsung-soc, linux-scsi, linux-tegra, linux-usb,
linux-wireless, netdev, Solarflare linux maintainers,
uclinux-dist-devel
Cc: James E.J. Bottomley
In-Reply-To: <20130919212235.GD12758@n2100.arm.linux.org.uk>
From: Santosh Shilimkar <santosh.shilimkar@ti.com>
DMA bounce limit is the maximum direct DMA'able memory beyond which
bounce buffers has to be used to perform dma operations. SCSI driver
relies on dma_mask but its calculation is based on max_*pfn which
don't have uniform meaning across architectures. So make use of
dma_max_pfn() which is expected to return the DMAable maximum pfn
value across architectures.
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
drivers/scsi/scsi_lib.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index d1549b7..7bd7f0d 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -1684,7 +1684,7 @@ u64 scsi_calculate_bounce_limit(struct Scsi_Host *shost)
host_dev = scsi_get_device(shost);
if (host_dev && host_dev->dma_mask)
- bounce_limit = *host_dev->dma_mask;
+ bounce_limit = dma_max_pfn(host_dev) << PAGE_SHIFT;
return bounce_limit;
}
--
1.7.4.4
^ permalink raw reply related
* [PATCH 50/51] ARM: 7797/1: mmc: Use dma_max_pfn(dev) helper for bounce_limit calculations
From: Russell King @ 2013-09-19 23:43 UTC (permalink / raw)
To: alsa-devel, b43-dev, devel, devicetree, dri-devel, e1000-devel,
linux-arm-kernel, linux-crypto, linux-doc, linux-fbdev, linux-ide,
linux-media, linux-mmc, linux-nvme, linux-omap, linuxppc-dev,
linux-samsung-soc, linux-scsi, linux-tegra, linux-usb,
linux-wireless, netdev, Solarflare linux maintainers,
uclinux-dist-devel
Cc: Chris Ball
In-Reply-To: <20130919212235.GD12758@n2100.arm.linux.org.uk>
From: Santosh Shilimkar <santosh.shilimkar@ti.com>
DMA bounce limit is the maximum direct DMA'able memory beyond which
bounce buffers has to be used to perform dma operations. MMC queue layr
relies on dma_mask but its calculation is based on max_*pfn which
don't have uniform meaning across architectures. So make use of
dma_max_pfn() which is expected to return the DMAable maximum pfn
value across architectures.
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
drivers/mmc/card/queue.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/drivers/mmc/card/queue.c b/drivers/mmc/card/queue.c
index fa9632e..357bbc5 100644
--- a/drivers/mmc/card/queue.c
+++ b/drivers/mmc/card/queue.c
@@ -15,6 +15,7 @@
#include <linux/freezer.h>
#include <linux/kthread.h>
#include <linux/scatterlist.h>
+#include <linux/dma-mapping.h>
#include <linux/mmc/card.h>
#include <linux/mmc/host.h>
@@ -196,7 +197,7 @@ int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card,
struct mmc_queue_req *mqrq_prev = &mq->mqrq[1];
if (mmc_dev(host)->dma_mask && *mmc_dev(host)->dma_mask)
- limit = *mmc_dev(host)->dma_mask;
+ limit = dma_max_pfn(mmc_dev(host)) << PAGE_SHIFT;
mq->card = card;
mq->queue = blk_init_queue(mmc_request_fn, lock);
--
1.7.4.4
^ permalink raw reply related
* [PATCH 51/51] ARM: 7805/1: mm: change max*pfn to include the physical offset of memory
From: Russell King @ 2013-09-19 23:44 UTC (permalink / raw)
To: alsa-devel, b43-dev, devel, devicetree, dri-devel, e1000-devel,
linux-arm-kernel, linux-crypto, linux-doc, linux-fbdev, linux-ide,
linux-media, linux-mmc, linux-nvme, linux-omap, linuxppc-dev,
linux-samsung-soc, linux-scsi, linux-tegra, linux-usb,
linux-wireless, netdev, Solarflare linux maintainers,
uclinux-dist-devel
Cc: Nicolas Pitre, Catalin Marinas, Will Deacon
In-Reply-To: <20130919212235.GD12758@n2100.arm.linux.org.uk>
From: Santosh Shilimkar <santosh.shilimkar@ti.com>
Most of the kernel code assumes that max*pfn is maximum pfns because
the physical start of memory is expected to be PFN0. Since this
assumption is not true on ARM architectures, the meaning of max*pfn
is number of memory pages. This is done to keep drivers happy which
are making use of of these variable to calculate the dma bounce limit
using dma_mask.
Now since we have a architecture override possibility for DMAable
maximum pfns, lets make meaning of max*pfns as maximum pnfs on ARM
as well.
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
arch/arm/include/asm/dma-mapping.h | 8 ++++++++
arch/arm/mm/init.c | 10 ++++------
2 files changed, 12 insertions(+), 6 deletions(-)
diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h
index 5b579b9..863cd84 100644
--- a/arch/arm/include/asm/dma-mapping.h
+++ b/arch/arm/include/asm/dma-mapping.h
@@ -64,6 +64,7 @@ static inline dma_addr_t virt_to_dma(struct device *dev, void *addr)
{
return (dma_addr_t)__virt_to_bus((unsigned long)(addr));
}
+
#else
static inline dma_addr_t pfn_to_dma(struct device *dev, unsigned long pfn)
{
@@ -86,6 +87,13 @@ static inline dma_addr_t virt_to_dma(struct device *dev, void *addr)
}
#endif
+/* The ARM override for dma_max_pfn() */
+static inline unsigned long dma_max_pfn(struct device *dev)
+{
+ return PHYS_PFN_OFFSET + dma_to_pfn(dev, *dev->dma_mask);
+}
+#define dma_max_pfn(dev) dma_max_pfn(dev)
+
/*
* DMA errors are defined by all-bits-set in the DMA address.
*/
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index 8aab24f..d50533c 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -426,12 +426,10 @@ void __init bootmem_init(void)
* This doesn't seem to be used by the Linux memory manager any
* more, but is used by ll_rw_block. If we can get rid of it, we
* also get rid of some of the stuff above as well.
- *
- * Note: max_low_pfn and max_pfn reflect the number of _pages_ in
- * the system, not the maximum PFN.
*/
- max_low_pfn = max_low - PHYS_PFN_OFFSET;
- max_pfn = max_high - PHYS_PFN_OFFSET;
+ min_low_pfn = min;
+ max_low_pfn = max_low;
+ max_pfn = max_high;
}
/*
@@ -537,7 +535,7 @@ static inline void free_area_high(unsigned long pfn, unsigned long end)
static void __init free_highpages(void)
{
#ifdef CONFIG_HIGHMEM
- unsigned long max_low = max_low_pfn + PHYS_PFN_OFFSET;
+ unsigned long max_low = max_low_pfn;
struct memblock_region *mem, *res;
/* set highmem page free */
--
1.7.4.4
^ permalink raw reply related
* Re: [PATCH 01/51] DMA-API: provide a helper to set both DMA and coherent DMA masks
From: Ben Hutchings @ 2013-09-20 1:21 UTC (permalink / raw)
To: Russell King
Cc: alsa-devel-K7yf7f+aM1XWsZ/bQMPhNw,
b43-dev-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
devel-gWbeCf7V1WCQmaza687I9mD2FQJk+8+b,
devicetree-u79uwXL29TY76Z2rM5mHXA,
dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW,
e1000-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
linux-crypto-u79uwXL29TY76Z2rM5mHXA,
linux-doc-u79uwXL29TY76Z2rM5mHXA,
linux-fbdev-u79uwXL29TY76Z2rM5mHXA,
linux-ide-u79uwXL29TY76Z2rM5mHXA,
linux-media-u79uwXL29TY76Z2rM5mHXA,
linux-mmc-u79uwXL29TY76Z2rM5mHXA,
linux-nvme-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
linux-omap-u79uwXL29TY76Z2rM5mHXA,
linuxppc-dev-uLR06cmDAlY/bJ5BZ2RsiQ,
linux-samsung-soc-u79uwXL29TY76Z2rM5mHXA,
linux-scsi-u79uwXL29TY76Z2rM5mHXA,
linux-tegra-u79uwXL29TY76Z2rM5mHXA,
linux-usb-u79uwXL29TY76Z2rM5mHXA,
linux-wireless-u79uwXL29TY76Z2rM5mHXA,
netdev-u79uwXL29TY76Z2rM5mHXA, Solarflare linux maintainers,
uclinux-dist-devel-ZG0+EudsQA8dtHy/vicBwGD2FQJk+8+b, Rob Landley,
Vinod Koul, Dan
In-Reply-To: <E1VMlja-0007fA-HU-eh5Bv4kxaXIANfyc6IWni62ZND6+EDdj@public.gmane.org>
On Thu, 2013-09-19 at 22:25 +0100, Russell King wrote:
> Provide a helper to set both the DMA and coherent DMA masks to the
> same value - this avoids duplicated code in a number of drivers,
> sometimes with buggy error handling, and also allows us identify
> which drivers do things differently.
>
> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
> ---
> Documentation/DMA-API-HOWTO.txt | 37 ++++++++++++++++++++++---------------
> Documentation/DMA-API.txt | 8 ++++++++
> include/linux/dma-mapping.h | 14 ++++++++++++++
> 3 files changed, 44 insertions(+), 15 deletions(-)
>
> diff --git a/Documentation/DMA-API-HOWTO.txt b/Documentation/DMA-API-HOWTO.txt
> index 14129f1..5e98303 100644
> --- a/Documentation/DMA-API-HOWTO.txt
> +++ b/Documentation/DMA-API-HOWTO.txt
[...]
> -dma_set_coherent_mask() will always be able to set the same or a
> -smaller mask as dma_set_mask(). However for the rare case that a
> +The coherent coherent mask will always be able to set the same or a
> +smaller mask as the streaming mask. However for the rare case that a
[...]
The new wording doesn't make sense; a mask doesn't set itself. I would
suggest:
"The coherent mask can always be set to the same or a smaller mask than
the streaming mask."
Ben.
--
Ben Hutchings, Staff Engineer, Solarflare
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.
^ permalink raw reply
page: next (older) | prev (newer) | latest
- recent:[subjects (threaded)|topics (new)|topics (active)]
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox