[PATCH 6.12.y] dmaengine: ti: k3-udma: Enable second resource range for BCDMA and PKTDMA
From: Sai Sree Kartheek Adivi <hidden>
Date: 2026-01-27 19:11:16
Also in:
dmaengine, lkml, stable
Subsystem:
dma generic offload engine subsystem, texas instruments dma drivers, the rest · Maintainers:
Vinod Koul, Vignesh Raghavendra, Linus Torvalds
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 <redacted> Link: https://lore.kernel.org/r/20250205121805.316792-1-s-vadapalli@ti.com (local) Signed-off-by: Vinod Koul <vkoul@kernel.org> Tested-by: Sai Sree Kartheek Adivi <redacted> Signed-off-by: Sai Sree Kartheek Adivi <redacted> --- Hi, This patch is upstreamed at [1]. This is required for ethernet to be functional on TI AM62P SoC. Thanks, Kartheek [1] v6.14-rc1-24-g566beb347ede https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/drivers/dma/ti/k3-udma.c?id=566beb347eded7a860511164a7a163bc882dc4d0 drivers/dma/ti/k3-udma.c | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+)
diff --git a/drivers/dma/ti/k3-udma.c b/drivers/dma/ti/k3-udma.c
index 38b54719587cf..e877cd50898bc 100644
--- a/drivers/dma/ti/k3-udma.c
+++ b/drivers/dma/ti/k3-udma.c@@ -4876,6 +4876,12 @@ static int bcdma_setup_resources(struct udma_dev *ud) 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 udma_dev *ud) 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 udma_dev *ud) 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 udma_dev *ud) 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 udma_dev *ud) 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);
--
2.34.1