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authorClemens Ladisch <clemens@ladisch.de>2012-03-18 19:04:43 +0100
committerStefan Richter <stefanr@s5r6.in-berlin.de>2012-03-18 22:15:39 +0100
commit910e76c607546ead218de8b11c32597d6b8fe7e4 (patch)
tree8a858f98ae79a998aeeef09d7b2a142d05d201b6 /drivers/firewire
parent73864012f386ca5a193f3231c9b1936e23709a94 (diff)
downloadlinux-910e76c607546ead218de8b11c32597d6b8fe7e4.tar.bz2
firewire: ohci: factor out iso completion flushing code
In preparation for the following patches that add more flushing, move the code for flushing accumulated header data into a common function. The timestamp of the last completed packed is passed through the context structure instead of a function parameter to allow accessing this value later outside of the handle_i?_packet functions. Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Diffstat (limited to 'drivers/firewire')
-rw-r--r--drivers/firewire/ohci.c37
1 files changed, 18 insertions, 19 deletions
diff --git a/drivers/firewire/ohci.c b/drivers/firewire/ohci.c
index 1a49743347fb..07d3c8d58b30 100644
--- a/drivers/firewire/ohci.c
+++ b/drivers/firewire/ohci.c
@@ -172,7 +172,7 @@ struct iso_context {
struct context context;
void *header;
size_t header_length;
-
+ u16 last_timestamp;
u8 sync;
u8 tags;
};
@@ -2676,6 +2676,14 @@ static void ohci_write_csr(struct fw_card *card, int csr_offset, u32 value)
}
}
+static void flush_iso_completions(struct iso_context *ctx)
+{
+ ctx->base.callback.sc(&ctx->base, ctx->last_timestamp,
+ ctx->header_length, ctx->header,
+ ctx->base.callback_data);
+ ctx->header_length = 0;
+}
+
static void copy_iso_headers(struct iso_context *ctx, const u32 *dma_hdr)
{
u32 *ctx_hdr;
@@ -2684,6 +2692,7 @@ static void copy_iso_headers(struct iso_context *ctx, const u32 *dma_hdr)
return;
ctx_hdr = ctx->header + ctx->header_length;
+ ctx->last_timestamp = (u16)le32_to_cpu((__force __le32)dma_hdr[0]);
/*
* The two iso header quadlets are byteswapped to little
@@ -2707,8 +2716,6 @@ static int handle_ir_packet_per_buffer(struct context *context,
container_of(context, struct iso_context, context);
struct descriptor *pd;
u32 buffer_dma;
- __le32 *ir_header;
- void *p;
for (pd = d; pd <= last; pd++)
if (pd->transfer_status)
@@ -2727,17 +2734,10 @@ static int handle_ir_packet_per_buffer(struct context *context,
DMA_FROM_DEVICE);
}
- p = last + 1;
- copy_iso_headers(ctx, p);
+ copy_iso_headers(ctx, (u32 *) (last + 1));
- if (last->control & cpu_to_le16(DESCRIPTOR_IRQ_ALWAYS)) {
- ir_header = (__le32 *) p;
- ctx->base.callback.sc(&ctx->base,
- le32_to_cpu(ir_header[0]) & 0xffff,
- ctx->header_length, ctx->header,
- ctx->base.callback_data);
- ctx->header_length = 0;
- }
+ if (last->control & cpu_to_le16(DESCRIPTOR_IRQ_ALWAYS))
+ flush_iso_completions(ctx);
return 1;
}
@@ -2834,12 +2834,11 @@ static int handle_it_packet(struct context *context,
le16_to_cpu(pd->res_count));
ctx->header_length += 4;
}
- if (last->control & cpu_to_le16(DESCRIPTOR_IRQ_ALWAYS)) {
- ctx->base.callback.sc(&ctx->base, le16_to_cpu(last->res_count),
- ctx->header_length, ctx->header,
- ctx->base.callback_data);
- ctx->header_length = 0;
- }
+
+ ctx->last_timestamp = le16_to_cpu(last->res_count);
+ if (last->control & cpu_to_le16(DESCRIPTOR_IRQ_ALWAYS))
+ flush_iso_completions(ctx);
+
return 1;
}