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iommu/apple-dart: Write to all DART_T8020_STREAM_SELECT

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We're about to add support for a DART variant that use more than 16
streams and requires writing to two separate stream select registers
when issuing TLB flushes.

Acked-by: Hector Martin <marcan@marcan.st>
Signed-off-by: Sven Peter <sven@svenpeter.dev>
Link: https://lore.kernel.org/r/20231126151701.16534-3-sven@svenpeter.dev
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Sven Peter 2023-11-26 16:17:00 +01:00 committed by Joerg Roedel
parent a08bd8df97
commit c58a17a997
1 changed files with 4 additions and 2 deletions
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6
drivers/iommu/apple-dart.c
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@ -368,12 +368,14 @@ apple_dart_t8020_hw_stream_command(struct apple_dart_stream_map *stream_map,
u32 command)
{
unsigned long flags;
int ret;
int ret, i;
u32 command_reg;
spin_lock_irqsave(&stream_map->dart->lock, flags);
writel(stream_map->sidmap[0], stream_map->dart->regs + DART_T8020_STREAM_SELECT);
for (i = 0; i < BITS_TO_U32(stream_map->dart->num_streams); i++)
writel(stream_map->sidmap[i],
stream_map->dart->regs + DART_T8020_STREAM_SELECT + 4 * i);
writel(command, stream_map->dart->regs + DART_T8020_STREAM_COMMAND);
ret = readl_poll_timeout_atomic(