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dma: ti: k3-udma: Move DMA channel[0] allocation to probe and add udma_remove()

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Currently, the allocation of DMA channel[0] for memcpy is happening
in udma_transfer() for every transfer, which leads to a huge overhead
for each transfer, especially in case of nand page reads. So, move this
allocation to udma_probe(), as a result, the allocation is done once
during probe.

Introduce udma_remove() for the cleanup of allocated channel during
probe.

Signed-off-by: Santhosh Kumar K <s-k6@ti.com>
Signed-off-by: Prasanth Babu Mantena <p-mantena@ti.com>
This commit is contained in:
Santhosh Kumar K 2024-10-09 20:27:03 +05:30 • committed by Tom Rini
parent 7f069cc9fa
commit f83076add0
1 changed files with 38 additions and 25 deletions
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63
drivers/dma/ti/k3-udma.c
View file

@ -2190,37 +2190,12 @@ static int udma_transfer(struct udevice *dev, int direction,
/* Channel0 is reserved for memcpy */
struct udma_chan *uc = &ud->channels[0];
dma_addr_t paddr = 0;
int ret;
switch (ud->match_data->type) {
case DMA_TYPE_UDMA:
ret = udma_alloc_chan_resources(uc);
break;
case DMA_TYPE_BCDMA:
ret = bcdma_alloc_chan_resources(uc);
break;
default:
return -EINVAL;
};
if (ret)
return ret;
udma_prep_dma_memcpy(uc, dst, src, len);
udma_start(uc);
udma_poll_completion(uc, &paddr);
udma_stop(uc);
switch (ud->match_data->type) {
case DMA_TYPE_UDMA:
udma_free_chan_resources(uc);
break;
case DMA_TYPE_BCDMA:
bcdma_free_bchan_resources(uc);
break;
default:
return -EINVAL;
};
return 0;
}
@ -2590,6 +2565,7 @@ static int udma_probe(struct udevice *dev)
struct udevice *tmp;
struct udevice *tisci_dev = NULL;
struct udma_tisci_rm *tisci_rm = &ud->tisci_rm;
struct udma_chan *uc;
ofnode navss_ofnode = ofnode_get_parent(dev_ofnode(dev));
ud->match_data = (void *)dev_get_driver_data(dev);
@ -2714,6 +2690,41 @@ static int udma_probe(struct udevice *dev)
uc_priv->supported = DMA_SUPPORTS_MEM_TO_MEM | DMA_SUPPORTS_MEM_TO_DEV;
uc = &ud->channels[0];
ret = 0;
switch (ud->match_data->type) {
case DMA_TYPE_UDMA:
ret = udma_alloc_chan_resources(uc);
break;
case DMA_TYPE_BCDMA:
ret = bcdma_alloc_chan_resources(uc);
break;
default:
break; /* Do nothing in any other case */
};
if (ret)
dev_err(dev, " Channel 0 allocation failure %d\n", ret);
return ret;
}
static int udma_remove(struct udevice *dev)
{
struct udma_dev *ud = dev_get_priv(dev);
struct udma_chan *uc = &ud->channels[0];
switch (ud->match_data->type) {
case DMA_TYPE_UDMA:
udma_free_chan_resources(uc);
break;
case DMA_TYPE_BCDMA:
bcdma_free_bchan_resources(uc);
break;
default:
break;
};
return 0;
}
@ -2855,5 +2866,7 @@ U_BOOT_DRIVER(ti_edma3) = {
.of_match = udma_ids,
.ops = &udma_ops,
.probe = udma_probe,
.remove = udma_remove,
.priv_auto = sizeof(struct udma_dev),
.flags = DM_FLAG_OS_PREPARE,
};