Linux-2.6.12-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!
diff --git a/arch/sh/cchips/voyagergx/consistent.c b/arch/sh/cchips/voyagergx/consistent.c
new file mode 100644
index 0000000..5b92585
--- /dev/null
+++ b/arch/sh/cchips/voyagergx/consistent.c
@@ -0,0 +1,126 @@
+/*
+ * arch/sh/cchips/voyagergx/consistent.c
+ *
+ * Copyright (C) 2004 Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/mm.h>
+#include <linux/dma-mapping.h>
+#include <linux/slab.h>
+#include <linux/list.h>
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <asm/io.h>
+#include <asm/bus-sh.h>
+
+struct voya_alloc_entry {
+ struct list_head list;
+ unsigned long ofs;
+ unsigned long len;
+};
+
+static DEFINE_SPINLOCK(voya_list_lock);
+static LIST_HEAD(voya_alloc_list);
+
+#define OHCI_SRAM_START 0xb0000000
+#define OHCI_HCCA_SIZE 0x100
+#define OHCI_SRAM_SIZE 0x10000
+
+void *voyagergx_consistent_alloc(struct device *dev, size_t size,
+ dma_addr_t *handle, int flag)
+{
+ struct list_head *list = &voya_alloc_list;
+ struct voya_alloc_entry *entry;
+ struct sh_dev *shdev = to_sh_dev(dev);
+ unsigned long start, end;
+ unsigned long flags;
+
+ /*
+ * The SM501 contains an integrated 8051 with its own SRAM.
+ * Devices within the cchip can all hook into the 8051 SRAM.
+ * We presently use this for the OHCI.
+ *
+ * Everything else goes through consistent_alloc().
+ */
+ if (!dev || dev->bus != &sh_bus_types[SH_BUS_VIRT] ||
+ (dev->bus == &sh_bus_types[SH_BUS_VIRT] &&
+ shdev->dev_id != SH_DEV_ID_USB_OHCI))
+ return NULL;
+
+ start = OHCI_SRAM_START + OHCI_HCCA_SIZE;
+
+ entry = kmalloc(sizeof(struct voya_alloc_entry), GFP_ATOMIC);
+ if (!entry)
+ return ERR_PTR(-ENOMEM);
+
+ entry->len = (size + 15) & ~15;
+
+ /*
+ * The basis for this allocator is dwmw2's malloc.. the
+ * Matrox allocator :-)
+ */
+ spin_lock_irqsave(&voya_list_lock, flags);
+ list_for_each(list, &voya_alloc_list) {
+ struct voya_alloc_entry *p;
+
+ p = list_entry(list, struct voya_alloc_entry, list);
+
+ if (p->ofs - start >= size)
+ goto out;
+
+ start = p->ofs + p->len;
+ }
+
+ end = start + (OHCI_SRAM_SIZE - OHCI_HCCA_SIZE);
+ list = &voya_alloc_list;
+
+ if (end - start >= size) {
+out:
+ entry->ofs = start;
+ list_add_tail(&entry->list, list);
+ spin_unlock_irqrestore(&voya_list_lock, flags);
+
+ *handle = start;
+ return (void *)start;
+ }
+
+ kfree(entry);
+ spin_unlock_irqrestore(&voya_list_lock, flags);
+
+ return ERR_PTR(-EINVAL);
+}
+
+int voyagergx_consistent_free(struct device *dev, size_t size,
+ void *vaddr, dma_addr_t handle)
+{
+ struct voya_alloc_entry *entry;
+ struct sh_dev *shdev = to_sh_dev(dev);
+ unsigned long flags;
+
+ if (!dev || dev->bus != &sh_bus_types[SH_BUS_VIRT] ||
+ (dev->bus == &sh_bus_types[SH_BUS_VIRT] &&
+ shdev->dev_id != SH_DEV_ID_USB_OHCI))
+ return -EINVAL;
+
+ spin_lock_irqsave(&voya_list_lock, flags);
+ list_for_each_entry(entry, &voya_alloc_list, list) {
+ if (entry->ofs != handle)
+ continue;
+
+ list_del(&entry->list);
+ kfree(entry);
+
+ break;
+ }
+ spin_unlock_irqrestore(&voya_list_lock, flags);
+
+ return 0;
+}
+
+EXPORT_SYMBOL(voyagergx_consistent_alloc);
+EXPORT_SYMBOL(voyagergx_consistent_free);
+