[PATCH 6.12 147/169] dmaengine: ti: k3-udma: Enable second resource range for BCDMA and PKTDMA

Greg Kroah-Hartman
2026-01-28T15:48:55Z

From: Siddharth Vadapalli <s-vadapalli@ti.com>

commit 566beb347eded7a860511164a7a163bc882dc4d0 upstream.

The SoC DMA resources for UDMA, BCDMA and PKTDMA can be described via a
combination of up to two resource ranges. The first resource range handles
the default partitioning wherein all resources belonging to that range are
allocated to a single entity and form a continuous range. For use-cases
where the resources are shared across multiple entities and require to be
described via discontinuous ranges, a second resource range is required.

Currently, udma_setup_resources() supports handling resources that belong
to the second range. Extend bcdma_setup_resources() and
pktdma_setup_resources() to support the same.

Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@gmail.com>
Link: https://lore.kernel.org/r/20250205121805.316792-1-s-vadapalli@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Tested-by: Sai Sree Kartheek Adivi <s-adivi@ti.com>
Signed-off-by: Sai Sree Kartheek Adivi <s-adivi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/dma/ti/k3-udma.c | 36 ++++++++++++++++++++++++++++++++++++
1 file changed, 36 insertions(+)

--- a/drivers/dma/ti/k3-udma.c
+++ b/drivers/dma/ti/k3-udma.c
@@ -4876,6 +4876,12 @@ static int bcdma_setup_resources(struct
irq_res.desc[i].start = rm_res->desc[i].start +
oes->bcdma_bchan_ring;
irq_res.desc[i].num = rm_res->desc[i].num;
+
+ if (rm_res->desc[i].num_sec) {
+ irq_res.desc[i].start_sec = rm_res->desc[i].start_sec +
+ oes->bcdma_bchan_ring;
+ irq_res.desc[i].num_sec = rm_res->desc[i].num_sec;
+ }
}
}
} else {
@@ -4899,6 +4905,15 @@ static int bcdma_setup_resources(struct
irq_res.desc[i + 1].start = rm_res->desc[j].start +
oes->bcdma_tchan_ring;
irq_res.desc[i + 1].num = rm_res->desc[j].num;
+
+ if (rm_res->desc[j].num_sec) {
+ irq_res.desc[i].start_sec = rm_res->desc[j].start_sec +
+ oes->bcdma_tchan_data;
+ irq_res.desc[i].num_sec = rm_res->desc[j].num_sec;
+ irq_res.desc[i + 1].start_sec = rm_res->desc[j].start_sec +
+ oes->bcdma_tchan_ring;
+ irq_res.desc[i + 1].num_sec = rm_res->desc[j].num_sec;
+ }
}
}
}
@@ -4919,6 +4934,15 @@ static int bcdma_setup_resources(struct
irq_res.desc[i + 1].start = rm_res->desc[j].start +
oes->bcdma_rchan_ring;
irq_res.desc[i + 1].num = rm_res->desc[j].num;
+
+ if (rm_res->desc[j].num_sec) {
+ irq_res.desc[i].start_sec = rm_res->desc[j].start_sec +
+ oes->bcdma_rchan_data;
+ irq_res.desc[i].num_sec = rm_res->desc[j].num_sec;
+ irq_res.desc[i + 1].start_sec = rm_res->desc[j].start_sec +
+ oes->bcdma_rchan_ring;
+ irq_res.desc[i + 1].num_sec = rm_res->desc[j].num_sec;
+ }
}
}
}
@@ -5053,6 +5077,12 @@ static int pktdma_setup_resources(struct
irq_res.desc[i].start = rm_res->desc[i].start +
oes->pktdma_tchan_flow;
irq_res.desc[i].num = rm_res->desc[i].num;
+
+ if (rm_res->desc[i].num_sec) {
+ irq_res.desc[i].start_sec = rm_res->desc[i].start_sec +
+ oes->pktdma_tchan_flow;
+ irq_res.desc[i].num_sec = rm_res->desc[i].num_sec;
+ }
}
}
rm_res = tisci_rm->rm_ranges[RM_RANGE_RFLOW];
@@ -5064,6 +5094,12 @@ static int pktdma_setup_resources(struct
irq_res.desc[i].start = rm_res->desc[j].start +
oes->pktdma_rchan_flow;
irq_res.desc[i].num = rm_res->desc[j].num;
+
+ if (rm_res->desc[j].num_sec) {
+ irq_res.desc[i].start_sec = rm_res->desc[j].start_sec +
+ oes->pktdma_rchan_flow;
+ irq_res.desc[i].num_sec = rm_res->desc[j].num_sec;
+ }
}
}
ret = ti_sci_inta_msi_domain_alloc_irqs(ud->dev, &irq_res);