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iommu: dart: Support a variable number of TTBRs per stream 

T8110 only has one TTBR per stream, so un-hardcode that.

Reviewed-by: Sven Peter <sven@svenpeter.dev>
Signed-off-by: Hector Martin <marcan@marcan.st>
Link: https://lore.kernel.org/r/20230113105029.26654-5-marcan@marcan.st
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Hector Martin 2023-01-13 19:50:27 +09:00 committed by Joerg Roedel
parent 510d4072df
commit 0b459bcdc5
1 changed files with 19 additions and 9 deletions
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28
drivers/iommu/apple-dart.c
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@ -77,15 +77,21 @@
#define DART_TCR_BYPASS0_ENABLE BIT(8)
#define DART_TCR_BYPASS1_ENABLE BIT(12)
#define DART_TTBR(sid, idx) (0x200 + 16 * (sid) + 4 * (idx))
#define DART_TTBR_VALID BIT(31)
#define DART_TTBR_SHIFT 12
#define DART_TTBR(dart, sid, idx) (0x200 + \
(((dart)->hw->ttbr_count * (sid)) << 2) + \
((idx) << 2))
struct apple_dart_hw {
u32 oas;
enum io_pgtable_fmt fmt;
int max_sid_count;
int ttbr_count;
};
/*
@ -245,7 +251,7 @@ static void apple_dart_hw_set_ttbr(struct apple_dart_stream_map *stream_map,
WARN_ON(paddr & ((1 << DART_TTBR_SHIFT) - 1));
for_each_set_bit(sid, stream_map->sidmap, dart->num_streams)
writel(DART_TTBR_VALID | (paddr >> DART_TTBR_SHIFT),
dart->regs + DART_TTBR(sid, idx));
dart->regs + DART_TTBR(dart, sid, idx));
}
static void apple_dart_hw_clear_ttbr(struct apple_dart_stream_map *stream_map,
@ -255,7 +261,7 @@ static void apple_dart_hw_clear_ttbr(struct apple_dart_stream_map *stream_map,
int sid;
for_each_set_bit(sid, stream_map->sidmap, dart->num_streams)
writel(0, dart->regs + DART_TTBR(sid, idx));
writel(0, dart->regs + DART_TTBR(dart, sid, idx));
}
static void
@ -263,7 +269,7 @@ apple_dart_hw_clear_all_ttbrs(struct apple_dart_stream_map *stream_map)
{
int i;
for (i = 0; i < DART_MAX_TTBR; ++i)
for (i = 0; i < stream_map->dart->hw->ttbr_count; ++i)
apple_dart_hw_clear_ttbr(stream_map, i);
}
@ -415,7 +421,7 @@ apple_dart_setup_translation(struct apple_dart_domain *domain,
for (i = 0; i < pgtbl_cfg->apple_dart_cfg.n_ttbrs; ++i)
apple_dart_hw_set_ttbr(stream_map, i,
pgtbl_cfg->apple_dart_cfg.ttbr[i]);
for (; i < DART_MAX_TTBR; ++i)
for (; i < stream_map->dart->hw->ttbr_count; ++i)
apple_dart_hw_clear_ttbr(stream_map, i);
apple_dart_hw_enable_translation(stream_map);
@ -956,11 +962,15 @@ static const struct apple_dart_hw apple_dart_hw_t8103 = {
.oas = 36,
.fmt = APPLE_DART,
.max_sid_count = 16,
.ttbr_count = 4,
};
static const struct apple_dart_hw apple_dart_hw_t6000 = {
.oas = 42,
.fmt = APPLE_DART2,
.max_sid_count = 16,
.ttbr_count = 4,
};
static __maybe_unused int apple_dart_suspend(struct device *dev)
@ -970,9 +980,9 @@ static __maybe_unused int apple_dart_suspend(struct device *dev)
for (sid = 0; sid < dart->num_streams; sid++) {
dart->save_tcr[sid] = readl_relaxed(dart->regs + DART_TCR(sid));
for (idx = 0; idx < DART_MAX_TTBR; idx++)
for (idx = 0; idx < dart->hw->ttbr_count; idx++)
dart->save_ttbr[sid][idx] =
readl(dart->regs + DART_TTBR(sid, idx));
readl(dart->regs + DART_TTBR(dart, sid, idx));
}
return 0;
@ -991,9 +1001,9 @@ static __maybe_unused int apple_dart_resume(struct device *dev)
}
for (sid = 0; sid < dart->num_streams; sid++) {
for (idx = 0; idx < DART_MAX_TTBR; idx++)
for (idx = 0; idx < dart->hw->ttbr_count; idx++)
writel(dart->save_ttbr[sid][idx],
dart->regs + DART_TTBR(sid, idx));
dart->regs + DART_TTBR(dart, sid, idx));
writel(dart->save_tcr[sid], dart->regs + DART_TCR(sid));
}