This moves files for mmu and iommu on Beat into platforms/cell/.
All files in this patch are used by celleb-beat only.
Signed-off-by: Kou Ishizaki <kou.ishizaki@toshiba.co.jp>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
celleb_pci.o celleb_scc_epci.o \
celleb_scc_uhc.o \
io-workarounds.o spider-pci.o \
- beat_hvCall.o
+ beat_htab.o beat_hvCall.o \
+ beat_iommu.o
obj-$(CONFIG_SERIAL_TXX9) += celleb_scc_sio.o
endif
--- /dev/null
+/*
+ * "Cell Reference Set" HTAB support.
+ *
+ * (C) Copyright 2006-2007 TOSHIBA CORPORATION
+ *
+ * This code is based on arch/powerpc/platforms/pseries/lpar.c:
+ * Copyright (C) 2001 Todd Inglett, IBM Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#undef DEBUG_LOW
+
+#include <linux/kernel.h>
+#include <linux/spinlock.h>
+
+#include <asm/mmu.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/machdep.h>
+#include <asm/udbg.h>
+
+#include "beat_wrapper.h"
+
+#ifdef DEBUG_LOW
+#define DBG_LOW(fmt...) do { udbg_printf(fmt); } while (0)
+#else
+#define DBG_LOW(fmt...) do { } while (0)
+#endif
+
+static DEFINE_SPINLOCK(beat_htab_lock);
+
+static inline unsigned int beat_read_mask(unsigned hpte_group)
+{
+ unsigned long hpte_v[5];
+ unsigned long rmask = 0;
+
+ beat_read_htab_entries(0, hpte_group + 0, hpte_v);
+ if (!(hpte_v[0] & HPTE_V_BOLTED))
+ rmask |= 0x8000;
+ if (!(hpte_v[1] & HPTE_V_BOLTED))
+ rmask |= 0x4000;
+ if (!(hpte_v[2] & HPTE_V_BOLTED))
+ rmask |= 0x2000;
+ if (!(hpte_v[3] & HPTE_V_BOLTED))
+ rmask |= 0x1000;
+ beat_read_htab_entries(0, hpte_group + 4, hpte_v);
+ if (!(hpte_v[0] & HPTE_V_BOLTED))
+ rmask |= 0x0800;
+ if (!(hpte_v[1] & HPTE_V_BOLTED))
+ rmask |= 0x0400;
+ if (!(hpte_v[2] & HPTE_V_BOLTED))
+ rmask |= 0x0200;
+ if (!(hpte_v[3] & HPTE_V_BOLTED))
+ rmask |= 0x0100;
+ hpte_group = ~hpte_group & (htab_hash_mask * HPTES_PER_GROUP);
+ beat_read_htab_entries(0, hpte_group + 0, hpte_v);
+ if (!(hpte_v[0] & HPTE_V_BOLTED))
+ rmask |= 0x80;
+ if (!(hpte_v[1] & HPTE_V_BOLTED))
+ rmask |= 0x40;
+ if (!(hpte_v[2] & HPTE_V_BOLTED))
+ rmask |= 0x20;
+ if (!(hpte_v[3] & HPTE_V_BOLTED))
+ rmask |= 0x10;
+ beat_read_htab_entries(0, hpte_group + 4, hpte_v);
+ if (!(hpte_v[0] & HPTE_V_BOLTED))
+ rmask |= 0x08;
+ if (!(hpte_v[1] & HPTE_V_BOLTED))
+ rmask |= 0x04;
+ if (!(hpte_v[2] & HPTE_V_BOLTED))
+ rmask |= 0x02;
+ if (!(hpte_v[3] & HPTE_V_BOLTED))
+ rmask |= 0x01;
+ return rmask;
+}
+
+static long beat_lpar_hpte_insert(unsigned long hpte_group,
+ unsigned long va, unsigned long pa,
+ unsigned long rflags, unsigned long vflags,
+ int psize, int ssize)
+{
+ unsigned long lpar_rc;
+ unsigned long slot;
+ unsigned long hpte_v, hpte_r;
+
+ /* same as iseries */
+ if (vflags & HPTE_V_SECONDARY)
+ return -1;
+
+ if (!(vflags & HPTE_V_BOLTED))
+ DBG_LOW("hpte_insert(group=%lx, va=%016lx, pa=%016lx, "
+ "rflags=%lx, vflags=%lx, psize=%d)\n",
+ hpte_group, va, pa, rflags, vflags, psize);
+
+ hpte_v = hpte_encode_v(va, psize, MMU_SEGSIZE_256M) |
+ vflags | HPTE_V_VALID;
+ hpte_r = hpte_encode_r(pa, psize) | rflags;
+
+ if (!(vflags & HPTE_V_BOLTED))
+ DBG_LOW(" hpte_v=%016lx, hpte_r=%016lx\n", hpte_v, hpte_r);
+
+ if (rflags & (_PAGE_GUARDED|_PAGE_NO_CACHE))
+ hpte_r &= ~_PAGE_COHERENT;
+
+ spin_lock(&beat_htab_lock);
+ lpar_rc = beat_read_mask(hpte_group);
+ if (lpar_rc == 0) {
+ if (!(vflags & HPTE_V_BOLTED))
+ DBG_LOW(" full\n");
+ spin_unlock(&beat_htab_lock);
+ return -1;
+ }
+
+ lpar_rc = beat_insert_htab_entry(0, hpte_group, lpar_rc << 48,
+ hpte_v, hpte_r, &slot);
+ spin_unlock(&beat_htab_lock);
+
+ /*
+ * Since we try and ioremap PHBs we don't own, the pte insert
+ * will fail. However we must catch the failure in hash_page
+ * or we will loop forever, so return -2 in this case.
+ */
+ if (unlikely(lpar_rc != 0)) {
+ if (!(vflags & HPTE_V_BOLTED))
+ DBG_LOW(" lpar err %lx\n", lpar_rc);
+ return -2;
+ }
+ if (!(vflags & HPTE_V_BOLTED))
+ DBG_LOW(" -> slot: %lx\n", slot);
+
+ /* We have to pass down the secondary bucket bit here as well */
+ return (slot ^ hpte_group) & 15;
+}
+
+static long beat_lpar_hpte_remove(unsigned long hpte_group)
+{
+ DBG_LOW("hpte_remove(group=%lx)\n", hpte_group);
+ return -1;
+}
+
+static unsigned long beat_lpar_hpte_getword0(unsigned long slot)
+{
+ unsigned long dword0, dword[5];
+ unsigned long lpar_rc;
+
+ lpar_rc = beat_read_htab_entries(0, slot & ~3UL, dword);
+
+ dword0 = dword[slot&3];
+
+ BUG_ON(lpar_rc != 0);
+
+ return dword0;
+}
+
+static void beat_lpar_hptab_clear(void)
+{
+ unsigned long size_bytes = 1UL << ppc64_pft_size;
+ unsigned long hpte_count = size_bytes >> 4;
+ int i;
+ unsigned long dummy0, dummy1;
+
+ /* TODO: Use bulk call */
+ for (i = 0; i < hpte_count; i++)
+ beat_write_htab_entry(0, i, 0, 0, -1UL, -1UL, &dummy0, &dummy1);
+}
+
+/*
+ * NOTE: for updatepp ops we are fortunate that the linux "newpp" bits and
+ * the low 3 bits of flags happen to line up. So no transform is needed.
+ * We can probably optimize here and assume the high bits of newpp are
+ * already zero. For now I am paranoid.
+ */
+static long beat_lpar_hpte_updatepp(unsigned long slot,
+ unsigned long newpp,
+ unsigned long va,
+ int psize, int ssize, int local)
+{
+ unsigned long lpar_rc;
+ unsigned long dummy0, dummy1, want_v;
+
+ want_v = hpte_encode_v(va, psize, MMU_SEGSIZE_256M);
+
+ DBG_LOW(" update: "
+ "avpnv=%016lx, slot=%016lx, psize: %d, newpp %016lx ... ",
+ want_v & HPTE_V_AVPN, slot, psize, newpp);
+
+ spin_lock(&beat_htab_lock);
+ dummy0 = beat_lpar_hpte_getword0(slot);
+ if ((dummy0 & ~0x7FUL) != (want_v & ~0x7FUL)) {
+ DBG_LOW("not found !\n");
+ spin_unlock(&beat_htab_lock);
+ return -1;
+ }
+
+ lpar_rc = beat_write_htab_entry(0, slot, 0, newpp, 0, 7, &dummy0,
+ &dummy1);
+ spin_unlock(&beat_htab_lock);
+ if (lpar_rc != 0 || dummy0 == 0) {
+ DBG_LOW("not found !\n");
+ return -1;
+ }
+
+ DBG_LOW("ok %lx %lx\n", dummy0, dummy1);
+
+ BUG_ON(lpar_rc != 0);
+
+ return 0;
+}
+
+static long beat_lpar_hpte_find(unsigned long va, int psize)
+{
+ unsigned long hash;
+ unsigned long i, j;
+ long slot;
+ unsigned long want_v, hpte_v;
+
+ hash = hpt_hash(va, mmu_psize_defs[psize].shift, MMU_SEGSIZE_256M);
+ want_v = hpte_encode_v(va, psize, MMU_SEGSIZE_256M);
+
+ for (j = 0; j < 2; j++) {
+ slot = (hash & htab_hash_mask) * HPTES_PER_GROUP;
+ for (i = 0; i < HPTES_PER_GROUP; i++) {
+ hpte_v = beat_lpar_hpte_getword0(slot);
+
+ if (HPTE_V_COMPARE(hpte_v, want_v)
+ && (hpte_v & HPTE_V_VALID)
+ && (!!(hpte_v & HPTE_V_SECONDARY) == j)) {
+ /* HPTE matches */
+ if (j)
+ slot = -slot;
+ return slot;
+ }
+ ++slot;
+ }
+ hash = ~hash;
+ }
+
+ return -1;
+}
+
+static void beat_lpar_hpte_updateboltedpp(unsigned long newpp,
+ unsigned long ea,
+ int psize, int ssize)
+{
+ unsigned long lpar_rc, slot, vsid, va, dummy0, dummy1;
+
+ vsid = get_kernel_vsid(ea, MMU_SEGSIZE_256M);
+ va = (vsid << 28) | (ea & 0x0fffffff);
+
+ spin_lock(&beat_htab_lock);
+ slot = beat_lpar_hpte_find(va, psize);
+ BUG_ON(slot == -1);
+
+ lpar_rc = beat_write_htab_entry(0, slot, 0, newpp, 0, 7,
+ &dummy0, &dummy1);
+ spin_unlock(&beat_htab_lock);
+
+ BUG_ON(lpar_rc != 0);
+}
+
+static void beat_lpar_hpte_invalidate(unsigned long slot, unsigned long va,
+ int psize, int ssize, int local)
+{
+ unsigned long want_v;
+ unsigned long lpar_rc;
+ unsigned long dummy1, dummy2;
+ unsigned long flags;
+
+ DBG_LOW(" inval : slot=%lx, va=%016lx, psize: %d, local: %d\n",
+ slot, va, psize, local);
+ want_v = hpte_encode_v(va, psize, MMU_SEGSIZE_256M);
+
+ spin_lock_irqsave(&beat_htab_lock, flags);
+ dummy1 = beat_lpar_hpte_getword0(slot);
+
+ if ((dummy1 & ~0x7FUL) != (want_v & ~0x7FUL)) {
+ DBG_LOW("not found !\n");
+ spin_unlock_irqrestore(&beat_htab_lock, flags);
+ return;
+ }
+
+ lpar_rc = beat_write_htab_entry(0, slot, 0, 0, HPTE_V_VALID, 0,
+ &dummy1, &dummy2);
+ spin_unlock_irqrestore(&beat_htab_lock, flags);
+
+ BUG_ON(lpar_rc != 0);
+}
+
+void __init hpte_init_beat(void)
+{
+ ppc_md.hpte_invalidate = beat_lpar_hpte_invalidate;
+ ppc_md.hpte_updatepp = beat_lpar_hpte_updatepp;
+ ppc_md.hpte_updateboltedpp = beat_lpar_hpte_updateboltedpp;
+ ppc_md.hpte_insert = beat_lpar_hpte_insert;
+ ppc_md.hpte_remove = beat_lpar_hpte_remove;
+ ppc_md.hpte_clear_all = beat_lpar_hptab_clear;
+}
+
+static long beat_lpar_hpte_insert_v3(unsigned long hpte_group,
+ unsigned long va, unsigned long pa,
+ unsigned long rflags, unsigned long vflags,
+ int psize, int ssize)
+{
+ unsigned long lpar_rc;
+ unsigned long slot;
+ unsigned long hpte_v, hpte_r;
+
+ /* same as iseries */
+ if (vflags & HPTE_V_SECONDARY)
+ return -1;
+
+ if (!(vflags & HPTE_V_BOLTED))
+ DBG_LOW("hpte_insert(group=%lx, va=%016lx, pa=%016lx, "
+ "rflags=%lx, vflags=%lx, psize=%d)\n",
+ hpte_group, va, pa, rflags, vflags, psize);
+
+ hpte_v = hpte_encode_v(va, psize, MMU_SEGSIZE_256M) |
+ vflags | HPTE_V_VALID;
+ hpte_r = hpte_encode_r(pa, psize) | rflags;
+
+ if (!(vflags & HPTE_V_BOLTED))
+ DBG_LOW(" hpte_v=%016lx, hpte_r=%016lx\n", hpte_v, hpte_r);
+
+ if (rflags & (_PAGE_GUARDED|_PAGE_NO_CACHE))
+ hpte_r &= ~_PAGE_COHERENT;
+
+ /* insert into not-volted entry */
+ lpar_rc = beat_insert_htab_entry3(0, hpte_group, hpte_v, hpte_r,
+ HPTE_V_BOLTED, 0, &slot);
+ /*
+ * Since we try and ioremap PHBs we don't own, the pte insert
+ * will fail. However we must catch the failure in hash_page
+ * or we will loop forever, so return -2 in this case.
+ */
+ if (unlikely(lpar_rc != 0)) {
+ if (!(vflags & HPTE_V_BOLTED))
+ DBG_LOW(" lpar err %lx\n", lpar_rc);
+ return -2;
+ }
+ if (!(vflags & HPTE_V_BOLTED))
+ DBG_LOW(" -> slot: %lx\n", slot);
+
+ /* We have to pass down the secondary bucket bit here as well */
+ return (slot ^ hpte_group) & 15;
+}
+
+/*
+ * NOTE: for updatepp ops we are fortunate that the linux "newpp" bits and
+ * the low 3 bits of flags happen to line up. So no transform is needed.
+ * We can probably optimize here and assume the high bits of newpp are
+ * already zero. For now I am paranoid.
+ */
+static long beat_lpar_hpte_updatepp_v3(unsigned long slot,
+ unsigned long newpp,
+ unsigned long va,
+ int psize, int ssize, int local)
+{
+ unsigned long lpar_rc;
+ unsigned long want_v;
+ unsigned long pss;
+
+ want_v = hpte_encode_v(va, psize, MMU_SEGSIZE_256M);
+ pss = (psize == MMU_PAGE_4K) ? -1UL : mmu_psize_defs[psize].penc;
+
+ DBG_LOW(" update: "
+ "avpnv=%016lx, slot=%016lx, psize: %d, newpp %016lx ... ",
+ want_v & HPTE_V_AVPN, slot, psize, newpp);
+
+ lpar_rc = beat_update_htab_permission3(0, slot, want_v, pss, 7, newpp);
+
+ if (lpar_rc == 0xfffffff7) {
+ DBG_LOW("not found !\n");
+ return -1;
+ }
+
+ DBG_LOW("ok\n");
+
+ BUG_ON(lpar_rc != 0);
+
+ return 0;
+}
+
+static void beat_lpar_hpte_invalidate_v3(unsigned long slot, unsigned long va,
+ int psize, int ssize, int local)
+{
+ unsigned long want_v;
+ unsigned long lpar_rc;
+ unsigned long pss;
+
+ DBG_LOW(" inval : slot=%lx, va=%016lx, psize: %d, local: %d\n",
+ slot, va, psize, local);
+ want_v = hpte_encode_v(va, psize, MMU_SEGSIZE_256M);
+ pss = (psize == MMU_PAGE_4K) ? -1UL : mmu_psize_defs[psize].penc;
+
+ lpar_rc = beat_invalidate_htab_entry3(0, slot, want_v, pss);
+
+ /* E_busy can be valid output: page may be already replaced */
+ BUG_ON(lpar_rc != 0 && lpar_rc != 0xfffffff7);
+}
+
+static int64_t _beat_lpar_hptab_clear_v3(void)
+{
+ return beat_clear_htab3(0);
+}
+
+static void beat_lpar_hptab_clear_v3(void)
+{
+ _beat_lpar_hptab_clear_v3();
+}
+
+void __init hpte_init_beat_v3(void)
+{
+ if (_beat_lpar_hptab_clear_v3() == 0) {
+ ppc_md.hpte_invalidate = beat_lpar_hpte_invalidate_v3;
+ ppc_md.hpte_updatepp = beat_lpar_hpte_updatepp_v3;
+ ppc_md.hpte_updateboltedpp = beat_lpar_hpte_updateboltedpp;
+ ppc_md.hpte_insert = beat_lpar_hpte_insert_v3;
+ ppc_md.hpte_remove = beat_lpar_hpte_remove;
+ ppc_md.hpte_clear_all = beat_lpar_hptab_clear_v3;
+ } else {
+ ppc_md.hpte_invalidate = beat_lpar_hpte_invalidate;
+ ppc_md.hpte_updatepp = beat_lpar_hpte_updatepp;
+ ppc_md.hpte_updateboltedpp = beat_lpar_hpte_updateboltedpp;
+ ppc_md.hpte_insert = beat_lpar_hpte_insert;
+ ppc_md.hpte_remove = beat_lpar_hpte_remove;
+ ppc_md.hpte_clear_all = beat_lpar_hptab_clear;
+ }
+}
--- /dev/null
+/*
+ * Support for IOMMU on Celleb platform.
+ *
+ * (C) Copyright 2006-2007 TOSHIBA CORPORATION
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/dma-mapping.h>
+#include <linux/pci.h>
+#include <linux/of_platform.h>
+
+#include <asm/machdep.h>
+
+#include "beat_wrapper.h"
+
+#define DMA_FLAGS 0xf800000000000000UL /* r/w permitted, coherency required,
+ strongest order */
+
+static int __init find_dma_window(u64 *io_space_id, u64 *ioid,
+ u64 *base, u64 *size, u64 *io_page_size)
+{
+ struct device_node *dn;
+ const unsigned long *dma_window;
+
+ for_each_node_by_type(dn, "ioif") {
+ dma_window = of_get_property(dn, "toshiba,dma-window", NULL);
+ if (dma_window) {
+ *io_space_id = (dma_window[0] >> 32) & 0xffffffffUL;
+ *ioid = dma_window[0] & 0x7ffUL;
+ *base = dma_window[1];
+ *size = dma_window[2];
+ *io_page_size = 1 << dma_window[3];
+ of_node_put(dn);
+ return 1;
+ }
+ }
+ return 0;
+}
+
+static unsigned long celleb_dma_direct_offset;
+
+static void __init celleb_init_direct_mapping(void)
+{
+ u64 lpar_addr, io_addr;
+ u64 io_space_id, ioid, dma_base, dma_size, io_page_size;
+
+ if (!find_dma_window(&io_space_id, &ioid, &dma_base, &dma_size,
+ &io_page_size)) {
+ pr_info("No dma window found !\n");
+ return;
+ }
+
+ for (lpar_addr = 0; lpar_addr < dma_size; lpar_addr += io_page_size) {
+ io_addr = lpar_addr + dma_base;
+ (void)beat_put_iopte(io_space_id, io_addr, lpar_addr,
+ ioid, DMA_FLAGS);
+ }
+
+ celleb_dma_direct_offset = dma_base;
+}
+
+static void celleb_dma_dev_setup(struct device *dev)
+{
+ dev->archdata.dma_ops = get_pci_dma_ops();
+ dev->archdata.dma_data = (void *)celleb_dma_direct_offset;
+}
+
+static void celleb_pci_dma_dev_setup(struct pci_dev *pdev)
+{
+ celleb_dma_dev_setup(&pdev->dev);
+}
+
+static int celleb_of_bus_notify(struct notifier_block *nb,
+ unsigned long action, void *data)
+{
+ struct device *dev = data;
+
+ /* We are only intereted in device addition */
+ if (action != BUS_NOTIFY_ADD_DEVICE)
+ return 0;
+
+ celleb_dma_dev_setup(dev);
+
+ return 0;
+}
+
+static struct notifier_block celleb_of_bus_notifier = {
+ .notifier_call = celleb_of_bus_notify
+};
+
+static int __init celleb_init_iommu(void)
+{
+ celleb_init_direct_mapping();
+ set_pci_dma_ops(&dma_direct_ops);
+ ppc_md.pci_dma_dev_setup = celleb_pci_dma_dev_setup;
+ bus_register_notifier(&of_platform_bus_type, &celleb_of_bus_notifier);
+
+ return 0;
+}
+
+machine_arch_initcall(celleb_beat, celleb_init_iommu);
-obj-y += interrupt.o iommu.o \
- htab.o beat.o
+obj-y += interrupt.o \
+ beat.o
obj-$(CONFIG_SMP) += smp.o
obj-$(CONFIG_PPC_UDBG_BEAT) += udbg_beat.o
+++ /dev/null
-/*
- * "Cell Reference Set" HTAB support.
- *
- * (C) Copyright 2006-2007 TOSHIBA CORPORATION
- *
- * This code is based on arch/powerpc/platforms/pseries/lpar.c:
- * Copyright (C) 2001 Todd Inglett, IBM Corporation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#undef DEBUG_LOW
-
-#include <linux/kernel.h>
-#include <linux/spinlock.h>
-
-#include <asm/mmu.h>
-#include <asm/page.h>
-#include <asm/pgtable.h>
-#include <asm/machdep.h>
-#include <asm/udbg.h>
-
-#include "../cell/beat_wrapper.h"
-
-#ifdef DEBUG_LOW
-#define DBG_LOW(fmt...) do { udbg_printf(fmt); } while (0)
-#else
-#define DBG_LOW(fmt...) do { } while (0)
-#endif
-
-static DEFINE_SPINLOCK(beat_htab_lock);
-
-static inline unsigned int beat_read_mask(unsigned hpte_group)
-{
- unsigned long hpte_v[5];
- unsigned long rmask = 0;
-
- beat_read_htab_entries(0, hpte_group + 0, hpte_v);
- if (!(hpte_v[0] & HPTE_V_BOLTED))
- rmask |= 0x8000;
- if (!(hpte_v[1] & HPTE_V_BOLTED))
- rmask |= 0x4000;
- if (!(hpte_v[2] & HPTE_V_BOLTED))
- rmask |= 0x2000;
- if (!(hpte_v[3] & HPTE_V_BOLTED))
- rmask |= 0x1000;
- beat_read_htab_entries(0, hpte_group + 4, hpte_v);
- if (!(hpte_v[0] & HPTE_V_BOLTED))
- rmask |= 0x0800;
- if (!(hpte_v[1] & HPTE_V_BOLTED))
- rmask |= 0x0400;
- if (!(hpte_v[2] & HPTE_V_BOLTED))
- rmask |= 0x0200;
- if (!(hpte_v[3] & HPTE_V_BOLTED))
- rmask |= 0x0100;
- hpte_group = ~hpte_group & (htab_hash_mask * HPTES_PER_GROUP);
- beat_read_htab_entries(0, hpte_group + 0, hpte_v);
- if (!(hpte_v[0] & HPTE_V_BOLTED))
- rmask |= 0x80;
- if (!(hpte_v[1] & HPTE_V_BOLTED))
- rmask |= 0x40;
- if (!(hpte_v[2] & HPTE_V_BOLTED))
- rmask |= 0x20;
- if (!(hpte_v[3] & HPTE_V_BOLTED))
- rmask |= 0x10;
- beat_read_htab_entries(0, hpte_group + 4, hpte_v);
- if (!(hpte_v[0] & HPTE_V_BOLTED))
- rmask |= 0x08;
- if (!(hpte_v[1] & HPTE_V_BOLTED))
- rmask |= 0x04;
- if (!(hpte_v[2] & HPTE_V_BOLTED))
- rmask |= 0x02;
- if (!(hpte_v[3] & HPTE_V_BOLTED))
- rmask |= 0x01;
- return rmask;
-}
-
-static long beat_lpar_hpte_insert(unsigned long hpte_group,
- unsigned long va, unsigned long pa,
- unsigned long rflags, unsigned long vflags,
- int psize, int ssize)
-{
- unsigned long lpar_rc;
- unsigned long slot;
- unsigned long hpte_v, hpte_r;
-
- /* same as iseries */
- if (vflags & HPTE_V_SECONDARY)
- return -1;
-
- if (!(vflags & HPTE_V_BOLTED))
- DBG_LOW("hpte_insert(group=%lx, va=%016lx, pa=%016lx, "
- "rflags=%lx, vflags=%lx, psize=%d)\n",
- hpte_group, va, pa, rflags, vflags, psize);
-
- hpte_v = hpte_encode_v(va, psize, MMU_SEGSIZE_256M) |
- vflags | HPTE_V_VALID;
- hpte_r = hpte_encode_r(pa, psize) | rflags;
-
- if (!(vflags & HPTE_V_BOLTED))
- DBG_LOW(" hpte_v=%016lx, hpte_r=%016lx\n", hpte_v, hpte_r);
-
- if (rflags & (_PAGE_GUARDED|_PAGE_NO_CACHE))
- hpte_r &= ~_PAGE_COHERENT;
-
- spin_lock(&beat_htab_lock);
- lpar_rc = beat_read_mask(hpte_group);
- if (lpar_rc == 0) {
- if (!(vflags & HPTE_V_BOLTED))
- DBG_LOW(" full\n");
- spin_unlock(&beat_htab_lock);
- return -1;
- }
-
- lpar_rc = beat_insert_htab_entry(0, hpte_group, lpar_rc << 48,
- hpte_v, hpte_r, &slot);
- spin_unlock(&beat_htab_lock);
-
- /*
- * Since we try and ioremap PHBs we don't own, the pte insert
- * will fail. However we must catch the failure in hash_page
- * or we will loop forever, so return -2 in this case.
- */
- if (unlikely(lpar_rc != 0)) {
- if (!(vflags & HPTE_V_BOLTED))
- DBG_LOW(" lpar err %lx\n", lpar_rc);
- return -2;
- }
- if (!(vflags & HPTE_V_BOLTED))
- DBG_LOW(" -> slot: %lx\n", slot);
-
- /* We have to pass down the secondary bucket bit here as well */
- return (slot ^ hpte_group) & 15;
-}
-
-static long beat_lpar_hpte_remove(unsigned long hpte_group)
-{
- DBG_LOW("hpte_remove(group=%lx)\n", hpte_group);
- return -1;
-}
-
-static unsigned long beat_lpar_hpte_getword0(unsigned long slot)
-{
- unsigned long dword0, dword[5];
- unsigned long lpar_rc;
-
- lpar_rc = beat_read_htab_entries(0, slot & ~3UL, dword);
-
- dword0 = dword[slot&3];
-
- BUG_ON(lpar_rc != 0);
-
- return dword0;
-}
-
-static void beat_lpar_hptab_clear(void)
-{
- unsigned long size_bytes = 1UL << ppc64_pft_size;
- unsigned long hpte_count = size_bytes >> 4;
- int i;
- unsigned long dummy0, dummy1;
-
- /* TODO: Use bulk call */
- for (i = 0; i < hpte_count; i++)
- beat_write_htab_entry(0, i, 0, 0, -1UL, -1UL, &dummy0, &dummy1);
-}
-
-/*
- * NOTE: for updatepp ops we are fortunate that the linux "newpp" bits and
- * the low 3 bits of flags happen to line up. So no transform is needed.
- * We can probably optimize here and assume the high bits of newpp are
- * already zero. For now I am paranoid.
- */
-static long beat_lpar_hpte_updatepp(unsigned long slot,
- unsigned long newpp,
- unsigned long va,
- int psize, int ssize, int local)
-{
- unsigned long lpar_rc;
- unsigned long dummy0, dummy1, want_v;
-
- want_v = hpte_encode_v(va, psize, MMU_SEGSIZE_256M);
-
- DBG_LOW(" update: "
- "avpnv=%016lx, slot=%016lx, psize: %d, newpp %016lx ... ",
- want_v & HPTE_V_AVPN, slot, psize, newpp);
-
- spin_lock(&beat_htab_lock);
- dummy0 = beat_lpar_hpte_getword0(slot);
- if ((dummy0 & ~0x7FUL) != (want_v & ~0x7FUL)) {
- DBG_LOW("not found !\n");
- spin_unlock(&beat_htab_lock);
- return -1;
- }
-
- lpar_rc = beat_write_htab_entry(0, slot, 0, newpp, 0, 7, &dummy0,
- &dummy1);
- spin_unlock(&beat_htab_lock);
- if (lpar_rc != 0 || dummy0 == 0) {
- DBG_LOW("not found !\n");
- return -1;
- }
-
- DBG_LOW("ok %lx %lx\n", dummy0, dummy1);
-
- BUG_ON(lpar_rc != 0);
-
- return 0;
-}
-
-static long beat_lpar_hpte_find(unsigned long va, int psize)
-{
- unsigned long hash;
- unsigned long i, j;
- long slot;
- unsigned long want_v, hpte_v;
-
- hash = hpt_hash(va, mmu_psize_defs[psize].shift, MMU_SEGSIZE_256M);
- want_v = hpte_encode_v(va, psize, MMU_SEGSIZE_256M);
-
- for (j = 0; j < 2; j++) {
- slot = (hash & htab_hash_mask) * HPTES_PER_GROUP;
- for (i = 0; i < HPTES_PER_GROUP; i++) {
- hpte_v = beat_lpar_hpte_getword0(slot);
-
- if (HPTE_V_COMPARE(hpte_v, want_v)
- && (hpte_v & HPTE_V_VALID)
- && (!!(hpte_v & HPTE_V_SECONDARY) == j)) {
- /* HPTE matches */
- if (j)
- slot = -slot;
- return slot;
- }
- ++slot;
- }
- hash = ~hash;
- }
-
- return -1;
-}
-
-static void beat_lpar_hpte_updateboltedpp(unsigned long newpp,
- unsigned long ea,
- int psize, int ssize)
-{
- unsigned long lpar_rc, slot, vsid, va, dummy0, dummy1;
-
- vsid = get_kernel_vsid(ea, MMU_SEGSIZE_256M);
- va = (vsid << 28) | (ea & 0x0fffffff);
-
- spin_lock(&beat_htab_lock);
- slot = beat_lpar_hpte_find(va, psize);
- BUG_ON(slot == -1);
-
- lpar_rc = beat_write_htab_entry(0, slot, 0, newpp, 0, 7,
- &dummy0, &dummy1);
- spin_unlock(&beat_htab_lock);
-
- BUG_ON(lpar_rc != 0);
-}
-
-static void beat_lpar_hpte_invalidate(unsigned long slot, unsigned long va,
- int psize, int ssize, int local)
-{
- unsigned long want_v;
- unsigned long lpar_rc;
- unsigned long dummy1, dummy2;
- unsigned long flags;
-
- DBG_LOW(" inval : slot=%lx, va=%016lx, psize: %d, local: %d\n",
- slot, va, psize, local);
- want_v = hpte_encode_v(va, psize, MMU_SEGSIZE_256M);
-
- spin_lock_irqsave(&beat_htab_lock, flags);
- dummy1 = beat_lpar_hpte_getword0(slot);
-
- if ((dummy1 & ~0x7FUL) != (want_v & ~0x7FUL)) {
- DBG_LOW("not found !\n");
- spin_unlock_irqrestore(&beat_htab_lock, flags);
- return;
- }
-
- lpar_rc = beat_write_htab_entry(0, slot, 0, 0, HPTE_V_VALID, 0,
- &dummy1, &dummy2);
- spin_unlock_irqrestore(&beat_htab_lock, flags);
-
- BUG_ON(lpar_rc != 0);
-}
-
-void __init hpte_init_beat(void)
-{
- ppc_md.hpte_invalidate = beat_lpar_hpte_invalidate;
- ppc_md.hpte_updatepp = beat_lpar_hpte_updatepp;
- ppc_md.hpte_updateboltedpp = beat_lpar_hpte_updateboltedpp;
- ppc_md.hpte_insert = beat_lpar_hpte_insert;
- ppc_md.hpte_remove = beat_lpar_hpte_remove;
- ppc_md.hpte_clear_all = beat_lpar_hptab_clear;
-}
-
-static long beat_lpar_hpte_insert_v3(unsigned long hpte_group,
- unsigned long va, unsigned long pa,
- unsigned long rflags, unsigned long vflags,
- int psize, int ssize)
-{
- unsigned long lpar_rc;
- unsigned long slot;
- unsigned long hpte_v, hpte_r;
-
- /* same as iseries */
- if (vflags & HPTE_V_SECONDARY)
- return -1;
-
- if (!(vflags & HPTE_V_BOLTED))
- DBG_LOW("hpte_insert(group=%lx, va=%016lx, pa=%016lx, "
- "rflags=%lx, vflags=%lx, psize=%d)\n",
- hpte_group, va, pa, rflags, vflags, psize);
-
- hpte_v = hpte_encode_v(va, psize, MMU_SEGSIZE_256M) |
- vflags | HPTE_V_VALID;
- hpte_r = hpte_encode_r(pa, psize) | rflags;
-
- if (!(vflags & HPTE_V_BOLTED))
- DBG_LOW(" hpte_v=%016lx, hpte_r=%016lx\n", hpte_v, hpte_r);
-
- if (rflags & (_PAGE_GUARDED|_PAGE_NO_CACHE))
- hpte_r &= ~_PAGE_COHERENT;
-
- /* insert into not-volted entry */
- lpar_rc = beat_insert_htab_entry3(0, hpte_group, hpte_v, hpte_r,
- HPTE_V_BOLTED, 0, &slot);
- /*
- * Since we try and ioremap PHBs we don't own, the pte insert
- * will fail. However we must catch the failure in hash_page
- * or we will loop forever, so return -2 in this case.
- */
- if (unlikely(lpar_rc != 0)) {
- if (!(vflags & HPTE_V_BOLTED))
- DBG_LOW(" lpar err %lx\n", lpar_rc);
- return -2;
- }
- if (!(vflags & HPTE_V_BOLTED))
- DBG_LOW(" -> slot: %lx\n", slot);
-
- /* We have to pass down the secondary bucket bit here as well */
- return (slot ^ hpte_group) & 15;
-}
-
-/*
- * NOTE: for updatepp ops we are fortunate that the linux "newpp" bits and
- * the low 3 bits of flags happen to line up. So no transform is needed.
- * We can probably optimize here and assume the high bits of newpp are
- * already zero. For now I am paranoid.
- */
-static long beat_lpar_hpte_updatepp_v3(unsigned long slot,
- unsigned long newpp,
- unsigned long va,
- int psize, int ssize, int local)
-{
- unsigned long lpar_rc;
- unsigned long want_v;
- unsigned long pss;
-
- want_v = hpte_encode_v(va, psize, MMU_SEGSIZE_256M);
- pss = (psize == MMU_PAGE_4K) ? -1UL : mmu_psize_defs[psize].penc;
-
- DBG_LOW(" update: "
- "avpnv=%016lx, slot=%016lx, psize: %d, newpp %016lx ... ",
- want_v & HPTE_V_AVPN, slot, psize, newpp);
-
- lpar_rc = beat_update_htab_permission3(0, slot, want_v, pss, 7, newpp);
-
- if (lpar_rc == 0xfffffff7) {
- DBG_LOW("not found !\n");
- return -1;
- }
-
- DBG_LOW("ok\n");
-
- BUG_ON(lpar_rc != 0);
-
- return 0;
-}
-
-static void beat_lpar_hpte_invalidate_v3(unsigned long slot, unsigned long va,
- int psize, int ssize, int local)
-{
- unsigned long want_v;
- unsigned long lpar_rc;
- unsigned long pss;
-
- DBG_LOW(" inval : slot=%lx, va=%016lx, psize: %d, local: %d\n",
- slot, va, psize, local);
- want_v = hpte_encode_v(va, psize, MMU_SEGSIZE_256M);
- pss = (psize == MMU_PAGE_4K) ? -1UL : mmu_psize_defs[psize].penc;
-
- lpar_rc = beat_invalidate_htab_entry3(0, slot, want_v, pss);
-
- /* E_busy can be valid output: page may be already replaced */
- BUG_ON(lpar_rc != 0 && lpar_rc != 0xfffffff7);
-}
-
-static int64_t _beat_lpar_hptab_clear_v3(void)
-{
- return beat_clear_htab3(0);
-}
-
-static void beat_lpar_hptab_clear_v3(void)
-{
- _beat_lpar_hptab_clear_v3();
-}
-
-void __init hpte_init_beat_v3(void)
-{
- if (_beat_lpar_hptab_clear_v3() == 0) {
- ppc_md.hpte_invalidate = beat_lpar_hpte_invalidate_v3;
- ppc_md.hpte_updatepp = beat_lpar_hpte_updatepp_v3;
- ppc_md.hpte_updateboltedpp = beat_lpar_hpte_updateboltedpp;
- ppc_md.hpte_insert = beat_lpar_hpte_insert_v3;
- ppc_md.hpte_remove = beat_lpar_hpte_remove;
- ppc_md.hpte_clear_all = beat_lpar_hptab_clear_v3;
- } else {
- ppc_md.hpte_invalidate = beat_lpar_hpte_invalidate;
- ppc_md.hpte_updatepp = beat_lpar_hpte_updatepp;
- ppc_md.hpte_updateboltedpp = beat_lpar_hpte_updateboltedpp;
- ppc_md.hpte_insert = beat_lpar_hpte_insert;
- ppc_md.hpte_remove = beat_lpar_hpte_remove;
- ppc_md.hpte_clear_all = beat_lpar_hptab_clear;
- }
-}
+++ /dev/null
-/*
- * Support for IOMMU on Celleb platform.
- *
- * (C) Copyright 2006-2007 TOSHIBA CORPORATION
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/dma-mapping.h>
-#include <linux/pci.h>
-#include <linux/of_platform.h>
-
-#include <asm/machdep.h>
-
-#include "../cell/beat_wrapper.h"
-
-#define DMA_FLAGS 0xf800000000000000UL /* r/w permitted, coherency required,
- strongest order */
-
-static int __init find_dma_window(u64 *io_space_id, u64 *ioid,
- u64 *base, u64 *size, u64 *io_page_size)
-{
- struct device_node *dn;
- const unsigned long *dma_window;
-
- for_each_node_by_type(dn, "ioif") {
- dma_window = of_get_property(dn, "toshiba,dma-window", NULL);
- if (dma_window) {
- *io_space_id = (dma_window[0] >> 32) & 0xffffffffUL;
- *ioid = dma_window[0] & 0x7ffUL;
- *base = dma_window[1];
- *size = dma_window[2];
- *io_page_size = 1 << dma_window[3];
- of_node_put(dn);
- return 1;
- }
- }
- return 0;
-}
-
-static unsigned long celleb_dma_direct_offset;
-
-static void __init celleb_init_direct_mapping(void)
-{
- u64 lpar_addr, io_addr;
- u64 io_space_id, ioid, dma_base, dma_size, io_page_size;
-
- if (!find_dma_window(&io_space_id, &ioid, &dma_base, &dma_size,
- &io_page_size)) {
- pr_info("No dma window found !\n");
- return;
- }
-
- for (lpar_addr = 0; lpar_addr < dma_size; lpar_addr += io_page_size) {
- io_addr = lpar_addr + dma_base;
- (void)beat_put_iopte(io_space_id, io_addr, lpar_addr,
- ioid, DMA_FLAGS);
- }
-
- celleb_dma_direct_offset = dma_base;
-}
-
-static void celleb_dma_dev_setup(struct device *dev)
-{
- dev->archdata.dma_ops = get_pci_dma_ops();
- dev->archdata.dma_data = (void *)celleb_dma_direct_offset;
-}
-
-static void celleb_pci_dma_dev_setup(struct pci_dev *pdev)
-{
- celleb_dma_dev_setup(&pdev->dev);
-}
-
-static int celleb_of_bus_notify(struct notifier_block *nb,
- unsigned long action, void *data)
-{
- struct device *dev = data;
-
- /* We are only intereted in device addition */
- if (action != BUS_NOTIFY_ADD_DEVICE)
- return 0;
-
- celleb_dma_dev_setup(dev);
-
- return 0;
-}
-
-static struct notifier_block celleb_of_bus_notifier = {
- .notifier_call = celleb_of_bus_notify
-};
-
-static int __init celleb_init_iommu(void)
-{
- celleb_init_direct_mapping();
- set_pci_dma_ops(&dma_direct_ops);
- ppc_md.pci_dma_dev_setup = celleb_pci_dma_dev_setup;
- bus_register_notifier(&of_platform_bus_type, &celleb_of_bus_notifier);
-
- return 0;
-}
-
-machine_arch_initcall(celleb_beat, celleb_init_iommu);
projects / cascardo / linux.git / commitdiff