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[PATCH] USB: UHCI: Split apart the physical and logical framelist arrays

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This patch (as563) splits the physical and logical framelist arrays in
uhci-hcd into two separate pieces.  This will allow slightly better memory
utilization, since each piece is no larger than a single page whereas
before the whole thing was a little bigger than two pages.  It also allows
the logical array to be allocated in non-DMA-coherent memory.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Stern
2005-09-16 14:22:51 -04:00
committed by Greg Kroah-Hartman
parent 8b4cd42134
commit a1d59ce842
4 changed files with 44 additions and 28 deletions
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20
drivers/usb/host/uhci-q.c
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@@ -89,10 +89,10 @@ static void uhci_insert_td_frame_list(struct uhci_hcd *uhci, struct uhci_td *td,
td->frame = framenum;
/* Is there a TD already mapped there? */
if (uhci->fl->frame_cpu[framenum]) {
if (uhci->frame_cpu[framenum]) {
struct uhci_td *ftd, *ltd;
ftd = uhci->fl->frame_cpu[framenum];
ftd = uhci->frame_cpu[framenum];
ltd = list_entry(ftd->fl_list.prev, struct uhci_td, fl_list);
list_add_tail(&td->fl_list, &ftd->fl_list);
@@ -101,10 +101,10 @@ static void uhci_insert_td_frame_list(struct uhci_hcd *uhci, struct uhci_td *td,
wmb();
ltd->link = cpu_to_le32(td->dma_handle);
} else {
td->link = uhci->fl->frame[framenum];
td->link = uhci->frame[framenum];
wmb();
uhci->fl->frame[framenum] = cpu_to_le32(td->dma_handle);
uhci->fl->frame_cpu[framenum] = td;
uhci->frame[framenum] = cpu_to_le32(td->dma_handle);
uhci->frame_cpu[framenum] = td;
}
}
@@ -114,16 +114,16 @@ static void uhci_remove_td(struct uhci_hcd *uhci, struct uhci_td *td)
if (td->frame == -1 && list_empty(&td->fl_list))
return;
if (td->frame != -1 && uhci->fl->frame_cpu[td->frame] == td) {
if (td->frame != -1 && uhci->frame_cpu[td->frame] == td) {
if (list_empty(&td->fl_list)) {
uhci->fl->frame[td->frame] = td->link;
uhci->fl->frame_cpu[td->frame] = NULL;
uhci->frame[td->frame] = td->link;
uhci->frame_cpu[td->frame] = NULL;
} else {
struct uhci_td *ntd;
ntd = list_entry(td->fl_list.next, struct uhci_td, fl_list);
uhci->fl->frame[td->frame] = cpu_to_le32(ntd->dma_handle);
uhci->fl->frame_cpu[td->frame] = ntd;
uhci->frame[td->frame] = cpu_to_le32(ntd->dma_handle);
uhci->frame_cpu[td->frame] = ntd;
}
} else {
struct uhci_td *ptd;