[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>
diff --git a/drivers/usb/host/uhci-hcd.c b/drivers/usb/host/uhci-hcd.c
index 17de9ee..b44094f 100644
--- a/drivers/usb/host/uhci-hcd.c
+++ b/drivers/usb/host/uhci-hcd.c
@@ -212,7 +212,7 @@
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 @@
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 @@
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 @@
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 @@
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 @@
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:
