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iommu/apple-dart: Clear stream error indicator bits for T8110 DARTs

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

Signed-off-by: Hector Martin <marcan@marcan.st>
Signed-off-by: Janne Grunau <j@jannau.net>
Reviewed-by: Sven Peter <sven@kernel.org>
Reviewed-by: Neal Gompa <neal@gompa.dev>
Link: https://lore.kernel.org/r/20250826-dart-t8110-stream-error-v1-1-e33395112014@jannau.net
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Hector Martin 2025-08-26 12:57:18 +02:00 committed by Joerg Roedel
parent 5229bd5f9e
commit ecf6508923
1 changed files with 5 additions and 0 deletions
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5
drivers/iommu/apple-dart.c
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@ -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;
}