Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 139 insertions, 0 deletions

diff --git a/drivers/usb/host/ohci-mem.c b/drivers/usb/host/ohci-mem.c
new file mode 100644
index 000000000000..e55682b4919d
--- /dev/null
+++ b/drivers/usb/host/ohci-mem.c
@@ -0,0 +1,139 @@
+/*
+ * OHCI HCD (Host Controller Driver) for USB.
+ * 
+ * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
+ * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
+ * 
+ * This file is licenced under the GPL.
+ */
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ * There's basically three types of memory:
+ *      - data used only by the HCD ... kmalloc is fine
+ *      - async and periodic schedules, shared by HC and HCD ... these
+ *        need to use dma_pool or dma_alloc_coherent
+ *      - driver buffers, read/written by HC ... the hcd glue or the
+ *        device driver provides us with dma addresses
+ *
+ * There's also PCI "register" data, which is memory mapped.
+ * No memory seen by this driver is pagable.
+ */
+
+/*-------------------------------------------------------------------------*/
+
+static void ohci_hcd_init (struct ohci_hcd *ohci)
+{
+        ohci->next_statechange = jiffies;
+        spin_lock_init (&ohci->lock);
+        INIT_LIST_HEAD (&ohci->pending);
+        INIT_WORK (&ohci->rh_resume, ohci_rh_resume, ohci_to_hcd(ohci));
+}
+
+/*-------------------------------------------------------------------------*/
+
+static int ohci_mem_init (struct ohci_hcd *ohci)
+{
+        ohci->td_cache = dma_pool_create ("ohci_td",
+                ohci_to_hcd(ohci)->self.controller,
+                sizeof (struct td),
+                32 /* byte alignment */,
+                0 /* no page-crossing issues */);
+        if (!ohci->td_cache)
+                return -ENOMEM;
+        ohci->ed_cache = dma_pool_create ("ohci_ed",
+                ohci_to_hcd(ohci)->self.controller,
+                sizeof (struct ed),
+                16 /* byte alignment */,
+                0 /* no page-crossing issues */);
+        if (!ohci->ed_cache) {
+                dma_pool_destroy (ohci->td_cache);
+                return -ENOMEM;
+        }
+        return 0;
+}
+
+static void ohci_mem_cleanup (struct ohci_hcd *ohci)
+{
+        if (ohci->td_cache) {
+                dma_pool_destroy (ohci->td_cache);
+                ohci->td_cache = NULL;
+        }
+        if (ohci->ed_cache) {
+                dma_pool_destroy (ohci->ed_cache);
+                ohci->ed_cache = NULL;
+        }
+}
+
+/*-------------------------------------------------------------------------*/
+
+/* ohci "done list" processing needs this mapping */
+static inline struct td *
+dma_to_td (struct ohci_hcd *hc, dma_addr_t td_dma)
+{
+        struct td *td;
+
+        td_dma &= TD_MASK;
+        td = hc->td_hash [TD_HASH_FUNC(td_dma)];
+        while (td && td->td_dma != td_dma)
+                td = td->td_hash;
+        return td;
+}
+
+/* TDs ... */
+static struct td *
+td_alloc (struct ohci_hcd *hc, int mem_flags)
+{
+        dma_addr_t      dma;
+        struct td       *td;
+
+        td = dma_pool_alloc (hc->td_cache, mem_flags, &dma);
+        if (td) {
+                /* in case hc fetches it, make it look dead */
+                memset (td, 0, sizeof *td);
+                td->hwNextTD = cpu_to_hc32 (hc, dma);
+                td->td_dma = dma;
+                /* hashed in td_fill */
+        }
+        return td;
+}
+
+static void
+td_free (struct ohci_hcd *hc, struct td *td)
+{
+        struct td       **prev = &hc->td_hash [TD_HASH_FUNC (td->td_dma)];
+
+        while (*prev && *prev != td)
+                prev = &(*prev)->td_hash;
+        if (*prev)
+                *prev = td->td_hash;
+        else if ((td->hwINFO & cpu_to_hc32(hc, TD_DONE)) != 0)
+                ohci_dbg (hc, "no hash for td %p\n", td);
+        dma_pool_free (hc->td_cache, td, td->td_dma);
+}
+
+/*-------------------------------------------------------------------------*/
+
+/* EDs ... */
+static struct ed *
+ed_alloc (struct ohci_hcd *hc, int mem_flags)
+{
+        dma_addr_t      dma;
+        struct ed       *ed;
+
+        ed = dma_pool_alloc (hc->ed_cache, mem_flags, &dma);
+        if (ed) {
+                memset (ed, 0, sizeof (*ed));
+                INIT_LIST_HEAD (&ed->td_list);
+                ed->dma = dma;
+        }
+        return ed;
+}
+
+static void
+ed_free (struct ohci_hcd *hc, struct ed *ed)
+{
+        dma_pool_free (hc->ed_cache, ed, ed->dma);
+}
+