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

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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/usb/host/uhci-debug.c
View File

@ -445,11 +445,11 @@ static int uhci_sprint_schedule(struct uhci_hcd *uhci, char *buf, int len)
out += sprintf(out, "Frame List\n");
for (i = 0; i < UHCI_NUMFRAMES; ++i) {
int shown = 0;
td = uhci->fl->frame_cpu[i];
td = uhci->frame_cpu[i];
if (!td)
continue;
if (td->dma_handle != (dma_addr_t)uhci->fl->frame[i]) {
if (td->dma_handle != (dma_addr_t)uhci->frame[i]) {
show_frame_num();
out += sprintf(out, " frame list does not match td->dma_handle!\n");
}

42
drivers/usb/host/uhci-hcd.c
View File

@ -212,7 +212,7 @@ static void configure_hc(struct uhci_hcd *uhci)
outb(USBSOF_DEFAULT, uhci->io_addr + USBSOF);
/* Store the frame list base address */
outl(uhci->fl->dma_handle, uhci->io_addr + USBFLBASEADD);
outl(uhci->frame_dma_handle, uhci->io_addr + USBFLBASEADD);
/* Set the current frame number */
outw(uhci->frame_number, uhci->io_addr + USBFRNUM);
@ -445,8 +445,11 @@ static void release_uhci(struct uhci_hcd *uhci)
dma_pool_destroy(uhci->td_pool);
dma_free_coherent(uhci_dev(uhci), sizeof(*uhci->fl),
uhci->fl, uhci->fl->dma_handle);
kfree(uhci->frame_cpu);
dma_free_coherent(uhci_dev(uhci),
UHCI_NUMFRAMES * sizeof(*uhci->frame),
uhci->frame, uhci->frame_dma_handle);
debugfs_remove(uhci->dentry);
}
@ -527,7 +530,6 @@ static int uhci_start(struct usb_hcd *hcd)
struct uhci_hcd *uhci = hcd_to_uhci(hcd);
int retval = -EBUSY;
int i;
dma_addr_t dma_handle;
struct dentry *dentry;
hcd->uses_new_polling = 1;
@ -561,17 +563,23 @@ static int uhci_start(struct usb_hcd *hcd)
init_waitqueue_head(&uhci->waitqh);
uhci->fl = dma_alloc_coherent(uhci_dev(uhci), sizeof(*uhci->fl),
&dma_handle, 0);
if (!uhci->fl) {
uhci->frame = dma_alloc_coherent(uhci_dev(uhci),
UHCI_NUMFRAMES * sizeof(*uhci->frame),
&uhci->frame_dma_handle, 0);
if (!uhci->frame) {
dev_err(uhci_dev(uhci), "unable to allocate "
"consistent memory for frame list\n");
goto err_alloc_fl;
goto err_alloc_frame;
}
memset(uhci->frame, 0, UHCI_NUMFRAMES * sizeof(*uhci->frame));
memset((void *)uhci->fl, 0, sizeof(*uhci->fl));
uhci->fl->dma_handle = dma_handle;
uhci->frame_cpu = kcalloc(UHCI_NUMFRAMES, sizeof(*uhci->frame_cpu),
GFP_KERNEL);
if (!uhci->frame_cpu) {
dev_err(uhci_dev(uhci), "unable to allocate "
"memory for frame pointers\n");
goto err_alloc_frame_cpu;
}
uhci->td_pool = dma_pool_create("uhci_td", uhci_dev(uhci),
sizeof(struct uhci_td), 16, 0);
@ -654,7 +662,7 @@ static int uhci_start(struct usb_hcd *hcd)
irq = 7;
/* Only place we don't use the frame list routines */
uhci->fl->frame[i] = UHCI_PTR_QH |
uhci->frame[i] = UHCI_PTR_QH |
cpu_to_le32(uhci->skelqh[irq]->dma_handle);
}
@ -686,10 +694,14 @@ static int uhci_start(struct usb_hcd *hcd)
dma_pool_destroy(uhci->td_pool);
err_create_td_pool:
dma_free_coherent(uhci_dev(uhci), sizeof(*uhci->fl),
uhci->fl, uhci->fl->dma_handle);
kfree(uhci->frame_cpu);
err_alloc_fl:
err_alloc_frame_cpu:
dma_free_coherent(uhci_dev(uhci),
UHCI_NUMFRAMES * sizeof(*uhci->frame),
uhci->frame, uhci->frame_dma_handle);
err_alloc_frame:
debugfs_remove(uhci->dentry);
err_create_debug_entry:

6
drivers/usb/host/uhci-hcd.h
View File

@ -359,7 +359,11 @@ struct uhci_hcd {
struct uhci_qh *skelqh[UHCI_NUM_SKELQH]; /* Skeleton QH's */
spinlock_t lock;
struct uhci_frame_list *fl; /* P: uhci->lock */
dma_addr_t frame_dma_handle; /* Hardware frame list */
__le32 *frame; /* P: uhci->lock */
void **frame_cpu; /* CPU's frame list */
int fsbr; /* Full-speed bandwidth reclamation */
unsigned long fsbrtimeout; /* FSBR delay */

20
drivers/usb/host/uhci-q.c
View File

@ -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;