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[v3,06/13] PCI: apple: Dynamically allocate RID-to_SID bitmap

Message ID 20250401091713.2765724-7-maz@kernel.org (mailing list archive)
State New
Delegated to: Krzysztof Wilczyński
Headers show
Series PCI: apple: Add support for t6020 | expand

Commit Message

Marc Zyngier April 1, 2025, 9:17 a.m. UTC 
As we move towards supporting SoCs with varying RID-to-SID mapping
capabilities, turn the static SID tracking bitmap into a dynamically
allocated one. The current allocation size is still the same, but
that's about to change.

Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Acked-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Tested-by: Janne Grunau <j@jannau.net>
Signed-off-by: Marc Zyngier <maz@kernel.org>
---
 drivers/pci/controller/pcie-apple.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)
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Patch

diff --git a/drivers/pci/controller/pcie-apple.c b/drivers/pci/controller/pcie-apple.c
index d07e488051290..6d3aa186d9c5f 100644
--- a/drivers/pci/controller/pcie-apple.c
+++ b/drivers/pci/controller/pcie-apple.c
@@ -147,7 +147,7 @@  struct apple_pcie_port {
 	void __iomem		*base;
 	struct irq_domain	*domain;
 	struct list_head	entry;
-	DECLARE_BITMAP(sid_map, MAX_RID2SID);
+	unsigned long		*sid_map;
 	int			sid_map_sz;
 	int			idx;
 };
@@ -524,6 +524,10 @@  static int apple_pcie_setup_port(struct apple_pcie *pcie,
 	if (!port)
 		return -ENOMEM;
 
+	port->sid_map = devm_bitmap_zalloc(pcie->dev, MAX_RID2SID, GFP_KERNEL);
+	if (!port->sid_map)
+		return -ENOMEM;
+
 	ret = of_property_read_u32_index(np, "reg", 0, &idx);
 	if (ret)
 		return ret;