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-rw-r--r--drivers/dma/dma-axi-dmac.c68
-rw-r--r--drivers/dma/dmaengine.c3
-rw-r--r--drivers/dma/dw-edma/dw-edma-core.h2
-rw-r--r--drivers/dma/dw-edma/dw-edma-pcie.c3
-rw-r--r--drivers/dma/dw-edma/dw-edma-v0-core.c6
-rw-r--r--drivers/dma/imx-sdma.c4
-rw-r--r--drivers/dma/qcom/gpi.c1
-rw-r--r--drivers/dma/sh/rz-dmac.c92
-rw-r--r--drivers/dma/tegra186-gpc-dma.c7
9 files changed, 99 insertions, 87 deletions
diff --git a/drivers/dma/dma-axi-dmac.c b/drivers/dma/dma-axi-dmac.c
index 45c2c8e4bc45..ce5cabc46065 100644
--- a/drivers/dma/dma-axi-dmac.c
+++ b/drivers/dma/dma-axi-dmac.c
@@ -13,6 +13,7 @@
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/dmaengine.h>
+#include <linux/dmapool.h>
#include <linux/err.h>
#include <linux/interrupt.h>
#include <linux/io.h>
@@ -147,6 +148,7 @@ struct axi_dmac_chan {
struct virt_dma_chan vchan;
struct axi_dmac_desc *next_desc;
+ void *pool;
struct list_head active_descs;
enum dma_transfer_direction direction;
@@ -650,11 +652,17 @@ static void axi_dmac_issue_pending(struct dma_chan *c)
spin_unlock_irqrestore(&chan->vchan.lock, flags);
}
+static void axi_dmac_free_desc(struct axi_dmac_desc *desc)
+{
+ for (unsigned int i = 0; i < desc->num_sgs; i++)
+ dma_pool_free(desc->chan->pool, desc->sg[i].hw, desc->sg[i].hw_phys);
+
+ kfree(desc);
+}
+
static struct axi_dmac_desc *
axi_dmac_alloc_desc(struct axi_dmac_chan *chan, unsigned int num_sgs)
{
- struct axi_dmac *dmac = chan_to_axi_dmac(chan);
- struct device *dev = dmac->dma_dev.dev;
struct axi_dmac_hw_desc *hws;
struct axi_dmac_desc *desc;
dma_addr_t hw_phys;
@@ -666,22 +674,22 @@ axi_dmac_alloc_desc(struct axi_dmac_chan *chan, unsigned int num_sgs)
desc->num_sgs = num_sgs;
desc->chan = chan;
- hws = dma_alloc_coherent(dev, PAGE_ALIGN(num_sgs * sizeof(*hws)),
- &hw_phys, GFP_ATOMIC);
- if (!hws) {
- kfree(desc);
- return NULL;
- }
-
for (i = 0; i < num_sgs; i++) {
- desc->sg[i].hw = &hws[i];
- desc->sg[i].hw_phys = hw_phys + i * sizeof(*hws);
+ hws = dma_pool_zalloc(chan->pool, GFP_NOWAIT, &hw_phys);
+ if (!hws) {
+ desc->num_sgs = i;
+ axi_dmac_free_desc(desc);
+ return NULL;
+ }
+
+ desc->sg[i].hw = hws;
+ desc->sg[i].hw_phys = hw_phys;
- hws[i].id = AXI_DMAC_SG_UNUSED;
- hws[i].flags = 0;
+ hws->id = AXI_DMAC_SG_UNUSED;
/* Link hardware descriptors */
- hws[i].next_sg_addr = hw_phys + (i + 1) * sizeof(*hws);
+ if (i)
+ desc->sg[i - 1].hw->next_sg_addr = hw_phys;
}
/* The last hardware descriptor will trigger an interrupt */
@@ -690,18 +698,6 @@ axi_dmac_alloc_desc(struct axi_dmac_chan *chan, unsigned int num_sgs)
return desc;
}
-static void axi_dmac_free_desc(struct axi_dmac_desc *desc)
-{
- struct axi_dmac *dmac = chan_to_axi_dmac(desc->chan);
- struct device *dev = dmac->dma_dev.dev;
- struct axi_dmac_hw_desc *hw = desc->sg[0].hw;
- dma_addr_t hw_phys = desc->sg[0].hw_phys;
-
- dma_free_coherent(dev, PAGE_ALIGN(desc->num_sgs * sizeof(*hw)),
- hw, hw_phys);
- kfree(desc);
-}
-
static struct axi_dmac_sg *axi_dmac_fill_linear_sg(struct axi_dmac_chan *chan,
enum dma_transfer_direction direction, dma_addr_t addr,
unsigned int num_periods, unsigned int period_len,
@@ -769,7 +765,7 @@ axi_dmac_prep_peripheral_dma_vec(struct dma_chan *c, const struct dma_vec *vecs,
for (i = 0; i < nb; i++) {
if (!axi_dmac_check_addr(chan, vecs[i].addr) ||
!axi_dmac_check_len(chan, vecs[i].len)) {
- kfree(desc);
+ axi_dmac_free_desc(desc);
return NULL;
}
@@ -935,9 +931,26 @@ static struct dma_async_tx_descriptor *axi_dmac_prep_interleaved(
return vchan_tx_prep(&chan->vchan, &desc->vdesc, flags);
}
+static int axi_dmac_alloc_chan_resources(struct dma_chan *c)
+{
+ struct axi_dmac_chan *chan = to_axi_dmac_chan(c);
+ struct device *dev = c->device->dev;
+
+ chan->pool = dma_pool_create(dev_name(dev), dev,
+ sizeof(struct axi_dmac_hw_desc),
+ __alignof__(struct axi_dmac_hw_desc), 0);
+ if (!chan->pool)
+ return -ENOMEM;
+
+ return 0;
+}
+
static void axi_dmac_free_chan_resources(struct dma_chan *c)
{
+ struct axi_dmac_chan *chan = to_axi_dmac_chan(c);
+
vchan_free_chan_resources(to_virt_chan(c));
+ dma_pool_destroy(chan->pool);
}
static void axi_dmac_desc_free(struct virt_dma_desc *vdesc)
@@ -1239,6 +1252,7 @@ static int axi_dmac_probe(struct platform_device *pdev)
dma_cap_set(DMA_SLAVE, dma_dev->cap_mask);
dma_cap_set(DMA_CYCLIC, dma_dev->cap_mask);
dma_cap_set(DMA_INTERLEAVE, dma_dev->cap_mask);
+ dma_dev->device_alloc_chan_resources = axi_dmac_alloc_chan_resources;
dma_dev->device_free_chan_resources = axi_dmac_free_chan_resources;
dma_dev->device_tx_status = dma_cookie_status;
dma_dev->device_issue_pending = axi_dmac_issue_pending;
diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c
index 405bd2fbb4a3..9049171df857 100644
--- a/drivers/dma/dmaengine.c
+++ b/drivers/dma/dmaengine.c
@@ -905,11 +905,12 @@ void dma_release_channel(struct dma_chan *chan)
mutex_lock(&dma_list_mutex);
WARN_ONCE(chan->client_count != 1,
"chan reference count %d != 1\n", chan->client_count);
- dma_chan_put(chan);
/* drop PRIVATE cap enabled by __dma_request_channel() */
if (--chan->device->privatecnt == 0)
dma_cap_clear(DMA_PRIVATE, chan->device->cap_mask);
+ dma_chan_put(chan);
+
if (chan->slave) {
sysfs_remove_link(&chan->dev->device.kobj, DMA_SLAVE_NAME);
sysfs_remove_link(&chan->slave->kobj, chan->name);
diff --git a/drivers/dma/dw-edma/dw-edma-core.h b/drivers/dma/dw-edma/dw-edma-core.h
index 902574b1ba86..6474cacf7195 100644
--- a/drivers/dma/dw-edma/dw-edma-core.h
+++ b/drivers/dma/dw-edma/dw-edma-core.h
@@ -109,7 +109,7 @@ struct dw_edma {
struct dw_edma_chan *chan;
- raw_spinlock_t lock; /* Only for legacy */
+ raw_spinlock_t lock; /* Protect v0 shared registers */
struct dw_edma_chip *chip;
diff --git a/drivers/dma/dw-edma/dw-edma-pcie.c b/drivers/dma/dw-edma/dw-edma-pcie.c
index 0b30ce138503..6639efffca58 100644
--- a/drivers/dma/dw-edma/dw-edma-pcie.c
+++ b/drivers/dma/dw-edma/dw-edma-pcie.c
@@ -314,6 +314,9 @@ static int dw_edma_pcie_probe(struct pci_dev *pdev,
int i, mask;
bool non_ll = false;
+ if (!pdata)
+ return -ENODEV;
+
struct dw_edma_pcie_data *vsec_data __free(kfree) =
kmalloc_obj(*vsec_data);
if (!vsec_data)
diff --git a/drivers/dma/dw-edma/dw-edma-v0-core.c b/drivers/dma/dw-edma/dw-edma-v0-core.c
index 69e8279adec8..cfdd6463252e 100644
--- a/drivers/dma/dw-edma/dw-edma-v0-core.c
+++ b/drivers/dma/dw-edma/dw-edma-v0-core.c
@@ -364,6 +364,7 @@ static void dw_edma_v0_core_start(struct dw_edma_chunk *chunk, bool first)
{
struct dw_edma_chan *chan = chunk->chan;
struct dw_edma *dw = chan->dw;
+ unsigned long flags;
u32 tmp;
dw_edma_v0_core_write_chunk(chunk);
@@ -408,6 +409,8 @@ static void dw_edma_v0_core_start(struct dw_edma_chunk *chunk, bool first)
}
}
/* Interrupt unmask - done, abort */
+ raw_spin_lock_irqsave(&dw->lock, flags);
+
tmp = GET_RW_32(dw, chan->dir, int_mask);
tmp &= ~FIELD_PREP(EDMA_V0_DONE_INT_MASK, BIT(chan->id));
tmp &= ~FIELD_PREP(EDMA_V0_ABORT_INT_MASK, BIT(chan->id));
@@ -416,6 +419,9 @@ static void dw_edma_v0_core_start(struct dw_edma_chunk *chunk, bool first)
tmp = GET_RW_32(dw, chan->dir, linked_list_err_en);
tmp |= FIELD_PREP(EDMA_V0_LINKED_LIST_ERR_MASK, BIT(chan->id));
SET_RW_32(dw, chan->dir, linked_list_err_en, tmp);
+
+ raw_spin_unlock_irqrestore(&dw->lock, flags);
+
/* Channel control */
SET_CH_32(dw, chan->dir, chan->id, ch_control1,
(DW_EDMA_V0_CCS | DW_EDMA_V0_LLE));
diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
index 3d527883776b..36368835a845 100644
--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@ -2364,7 +2364,9 @@ static int sdma_probe(struct platform_device *pdev)
return dev_err_probe(&pdev->dev, ret,
"failed to register controller\n");
- spba_bus = of_find_compatible_node(NULL, NULL, "fsl,spba-bus");
+ struct device_node *sdma_parent_np __free(device_node) = of_get_parent(np);
+
+ spba_bus = of_get_compatible_child(sdma_parent_np, "fsl,spba-bus");
ret = of_address_to_resource(spba_bus, 0, &spba_res);
if (!ret) {
sdma->spba_start_addr = spba_res.start;
diff --git a/drivers/dma/qcom/gpi.c b/drivers/dma/qcom/gpi.c
index c9a6f610ffd9..a5055a6273af 100644
--- a/drivers/dma/qcom/gpi.c
+++ b/drivers/dma/qcom/gpi.c
@@ -2260,6 +2260,7 @@ static int gpi_probe(struct platform_device *pdev)
/* clear and Set capabilities */
dma_cap_zero(gpi_dev->dma_device.cap_mask);
dma_cap_set(DMA_SLAVE, gpi_dev->dma_device.cap_mask);
+ dma_cap_set(DMA_PRIVATE, gpi_dev->dma_device.cap_mask);
/* configure dmaengine apis */
gpi_dev->dma_device.directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV);
diff --git a/drivers/dma/sh/rz-dmac.c b/drivers/dma/sh/rz-dmac.c
index 625ff29024de..6d80cb668957 100644
--- a/drivers/dma/sh/rz-dmac.c
+++ b/drivers/dma/sh/rz-dmac.c
@@ -723,8 +723,8 @@ static u32 rz_dmac_chan_get_residue(struct rz_dmac_chan *channel,
u32 crla, crtb, i;
/* Get current processing virtual descriptor */
- current_desc = list_first_entry(&channel->ld_active,
- struct rz_dmac_desc, node);
+ current_desc = list_first_entry_or_null(&channel->ld_active,
+ struct rz_dmac_desc, node);
if (!current_desc)
return 0;
@@ -981,25 +981,6 @@ static int rz_dmac_chan_probe(struct rz_dmac *dmac,
channel->index = index;
channel->mid_rid = -EINVAL;
- /* Request the channel interrupt. */
- scnprintf(pdev_irqname, sizeof(pdev_irqname), "ch%u", index);
- irq = platform_get_irq_byname(pdev, pdev_irqname);
- if (irq < 0)
- return irq;
-
- irqname = devm_kasprintf(dmac->dev, GFP_KERNEL, "%s:%u",
- dev_name(dmac->dev), index);
- if (!irqname)
- return -ENOMEM;
-
- ret = devm_request_threaded_irq(dmac->dev, irq, rz_dmac_irq_handler,
- rz_dmac_irq_handler_thread, 0,
- irqname, channel);
- if (ret) {
- dev_err(dmac->dev, "failed to request IRQ %u (%d)\n", irq, ret);
- return ret;
- }
-
/* Set io base address for each channel */
if (index < 8) {
channel->ch_base = dmac->base + CHANNEL_0_7_OFFSET +
@@ -1012,9 +993,9 @@ static int rz_dmac_chan_probe(struct rz_dmac *dmac,
}
/* Allocate descriptors */
- lmdesc = dma_alloc_coherent(&pdev->dev,
- sizeof(struct rz_lmdesc) * DMAC_NR_LMDESC,
- &channel->lmdesc.base_dma, GFP_KERNEL);
+ lmdesc = dmam_alloc_coherent(&pdev->dev,
+ sizeof(struct rz_lmdesc) * DMAC_NR_LMDESC,
+ &channel->lmdesc.base_dma, GFP_KERNEL);
if (!lmdesc) {
dev_err(&pdev->dev, "Can't allocate memory (lmdesc)\n");
return -ENOMEM;
@@ -1030,7 +1011,24 @@ static int rz_dmac_chan_probe(struct rz_dmac *dmac,
INIT_LIST_HEAD(&channel->ld_free);
INIT_LIST_HEAD(&channel->ld_active);
- return 0;
+ /* Request the channel interrupt. */
+ scnprintf(pdev_irqname, sizeof(pdev_irqname), "ch%u", index);
+ irq = platform_get_irq_byname(pdev, pdev_irqname);
+ if (irq < 0)
+ return irq;
+
+ irqname = devm_kasprintf(dmac->dev, GFP_KERNEL, "%s:%u",
+ dev_name(dmac->dev), index);
+ if (!irqname)
+ return -ENOMEM;
+
+ ret = devm_request_threaded_irq(dmac->dev, irq, rz_dmac_irq_handler,
+ rz_dmac_irq_handler_thread, 0,
+ irqname, channel);
+ if (ret)
+ dev_err(dmac->dev, "failed to request IRQ %u (%d)\n", irq, ret);
+
+ return ret;
}
static void rz_dmac_put_device(void *_dev)
@@ -1099,7 +1097,6 @@ static int rz_dmac_probe(struct platform_device *pdev)
const char *irqname = "error";
struct dma_device *engine;
struct rz_dmac *dmac;
- int channel_num;
int ret;
int irq;
u8 i;
@@ -1132,18 +1129,6 @@ static int rz_dmac_probe(struct platform_device *pdev)
return PTR_ERR(dmac->ext_base);
}
- /* Register interrupt handler for error */
- irq = platform_get_irq_byname_optional(pdev, irqname);
- if (irq > 0) {
- ret = devm_request_irq(&pdev->dev, irq, rz_dmac_irq_handler, 0,
- irqname, NULL);
- if (ret) {
- dev_err(&pdev->dev, "failed to request IRQ %u (%d)\n",
- irq, ret);
- return ret;
- }
- }
-
/* Initialize the channels. */
INIT_LIST_HEAD(&dmac->engine.channels);
@@ -1169,6 +1154,18 @@ static int rz_dmac_probe(struct platform_device *pdev)
goto err;
}
+ /* Register interrupt handler for error */
+ irq = platform_get_irq_byname_optional(pdev, irqname);
+ if (irq > 0) {
+ ret = devm_request_irq(&pdev->dev, irq, rz_dmac_irq_handler, 0,
+ irqname, NULL);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to request IRQ %u (%d)\n",
+ irq, ret);
+ goto err;
+ }
+ }
+
/* Register the DMAC as a DMA provider for DT. */
ret = of_dma_controller_register(pdev->dev.of_node, rz_dmac_of_xlate,
NULL);
@@ -1210,16 +1207,6 @@ static int rz_dmac_probe(struct platform_device *pdev)
dma_register_err:
of_dma_controller_free(pdev->dev.of_node);
err:
- channel_num = i ? i - 1 : 0;
- for (i = 0; i < channel_num; i++) {
- struct rz_dmac_chan *channel = &dmac->channels[i];
-
- dma_free_coherent(&pdev->dev,
- sizeof(struct rz_lmdesc) * DMAC_NR_LMDESC,
- channel->lmdesc.base,
- channel->lmdesc.base_dma);
- }
-
reset_control_assert(dmac->rstc);
err_pm_runtime_put:
pm_runtime_put(&pdev->dev);
@@ -1232,18 +1219,9 @@ err_pm_disable:
static void rz_dmac_remove(struct platform_device *pdev)
{
struct rz_dmac *dmac = platform_get_drvdata(pdev);
- unsigned int i;
dma_async_device_unregister(&dmac->engine);
of_dma_controller_free(pdev->dev.of_node);
- for (i = 0; i < dmac->n_channels; i++) {
- struct rz_dmac_chan *channel = &dmac->channels[i];
-
- dma_free_coherent(&pdev->dev,
- sizeof(struct rz_lmdesc) * DMAC_NR_LMDESC,
- channel->lmdesc.base,
- channel->lmdesc.base_dma);
- }
reset_control_assert(dmac->rstc);
pm_runtime_put(&pdev->dev);
pm_runtime_disable(&pdev->dev);
diff --git a/drivers/dma/tegra186-gpc-dma.c b/drivers/dma/tegra186-gpc-dma.c
index 5948fbf32c21..0aa3a02b2277 100644
--- a/drivers/dma/tegra186-gpc-dma.c
+++ b/drivers/dma/tegra186-gpc-dma.c
@@ -825,6 +825,13 @@ static unsigned int get_burst_size(struct tegra_dma_channel *tdc,
* len to calculate the optimum burst size
*/
burst_byte = burst_size ? burst_size * slave_bw : len;
+
+ /*
+ * Find the largest burst size that evenly divides the transfer length.
+ * The hardware requires the transfer length to be a multiple of the
+ * burst size - partial bursts are not supported.
+ */
+ burst_byte = min(burst_byte, 1U << __ffs(len));
burst_mmio_width = burst_byte / 4;
if (burst_mmio_width < TEGRA_GPCDMA_MMIOSEQ_BURST_MIN)
generated by cgit v1.2.3 (git 2.25.1) at 2026-07-24 20:06:03 +0000