Commit ecf65089 authored by Hector Martin's avatar Hector Martin Committed by Joerg Roedel
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iommu/apple-dart: Clear stream error indicator bits for T8110 DARTs 



These registers exist and at least on the t602x variant the IRQ only
clears when theses are cleared.

Signed-off-by: default avatarHector Martin <marcan@marcan.st>
Signed-off-by: default avatarJanne Grunau <j@jannau.net>
Reviewed-by: default avatarSven Peter <sven@kernel.org>
Reviewed-by: default avatarNeal Gompa <neal@gompa.dev>
Link: https://lore.kernel.org/r/20250826-dart-t8110-stream-error-v1-1-e33395112014@jannau.net


Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
parent 5229bd5f

drivers/iommu/apple-dart.c

+5 −0
Original line number Diff line number Diff line
@@ -122,6 +122,8 @@ 
#define DART_T8110_ERROR_ADDR_LO 0x170

#define DART_T8110_ERROR_ADDR_HI 0x174



#define DART_T8110_ERROR_STREAMS 0x1c0



#define DART_T8110_PROTECT 0x200

#define DART_T8110_UNPROTECT 0x204

#define DART_T8110_PROTECT_LOCK 0x208
@@ -1089,6 +1091,9 @@ static irqreturn_t apple_dart_t8110_irq(int irq, void *dev) 
		error, stream_idx, error_code, fault_name, addr);



	writel(error, dart->regs + DART_T8110_ERROR);

	for (int i = 0; i < BITS_TO_U32(dart->num_streams); i++)

		writel(U32_MAX, dart->regs + DART_T8110_ERROR_STREAMS + 4 * i);



	return IRQ_HANDLED;

}