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| author | Kevin O'Connor <kevin@koconnor.net> | 2014-12-31 01:42:38 -0500 |
|---|---|---|
| committer | Kevin O'Connor <kevin@koconnor.net> | 2015-01-01 13:51:22 -0500 |
| commit | 6f86b8936edb948bb878e36f4a1761a5b124594e (patch) | |
| tree | 3841e42cd28532b3d605096b24831bccc3aa3745 | |
| parent | 1fdc26ec96d7bb1b356775f2c1ae10956f2bcd6f (diff) | |
| download | seabios-6f86b8936edb948bb878e36f4a1761a5b124594e.zip seabios-6f86b8936edb948bb878e36f4a1761a5b124594e.tar.gz seabios-6f86b8936edb948bb878e36f4a1761a5b124594e.tar.bz2 | |
uhci: Increase bulk transfer STACKTDS to 16
Increase the number of simultaneous transfer descriptors that the
driver will build for uhci. The old value of 4 was a leftover from
when SeaBIOS had a tiny 512 byte extra stack - now that there is a 2K
extra stack there is plenty of space for additional descriptors.
Using a value of 16 should allow for an entire 1ms frame of bulk
transfer content to be setup in advance (assuming the max packet size
is 64 bytes).
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
| -rw-r--r-- | src/hw/usb-uhci.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/src/hw/usb-uhci.c b/src/hw/usb-uhci.c index 7ef50d1..06a1d4e 100644 --- a/src/hw/usb-uhci.c +++ b/src/hw/usb-uhci.c @@ -500,7 +500,7 @@ uhci_send_control(struct usb_pipe *p, int dir, const void *cmd, int cmdsize return ret; } -#define STACKTDS 4 +#define STACKTDS 16 #define TDALIGN 16 int @@ -517,7 +517,7 @@ uhci_send_bulk(struct usb_pipe *p, int dir, void *data, int datasize) | (GET_LOWFLAT(pipe->pipe.ep) << 7)); int toggle = GET_LOWFLAT(pipe->toggle) ? TD_TOKEN_TOGGLE : 0; - // Allocate 4 tds on stack (16byte aligned) + // Allocate 16 tds on stack (16byte aligned) u8 tdsbuf[sizeof(struct uhci_td) * STACKTDS + TDALIGN - 1]; struct uhci_td *tds = (void*)ALIGN((u32)tdsbuf, TDALIGN); memset(tds, 0, sizeof(*tds) * STACKTDS); |