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-rw-r--r--arch/tile/gxio/Kconfig5
-rw-r--r--arch/tile/gxio/Makefile5
-rw-r--r--arch/tile/gxio/iorpc_globals.c89
-rw-r--r--arch/tile/gxio/kiorpc.c61
4 files changed, 160 insertions, 0 deletions
diff --git a/arch/tile/gxio/Kconfig b/arch/tile/gxio/Kconfig
new file mode 100644
index 00000000000..8eff47fe123
--- /dev/null
+++ b/arch/tile/gxio/Kconfig
@@ -0,0 +1,5 @@
+# Support direct access to TILE-Gx hardware from user space, via the
+# gxio library, or from kernel space, via kernel IORPC support.
+config TILE_GXIO
+ bool
+ depends on TILEGX
diff --git a/arch/tile/gxio/Makefile b/arch/tile/gxio/Makefile
new file mode 100644
index 00000000000..db1ee2863d8
--- /dev/null
+++ b/arch/tile/gxio/Makefile
@@ -0,0 +1,5 @@
+#
+# Makefile for the Tile-Gx device access support.
+#
+
+obj-$(CONFIG_TILE_GXIO) += iorpc_globals.o kiorpc.o
diff --git a/arch/tile/gxio/iorpc_globals.c b/arch/tile/gxio/iorpc_globals.c
new file mode 100644
index 00000000000..e178e90805a
--- /dev/null
+++ b/arch/tile/gxio/iorpc_globals.c
@@ -0,0 +1,89 @@
+/*
+ * Copyright 2012 Tilera Corporation. All Rights Reserved.
+ *
+ * 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, version 2.
+ *
+ * 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, GOOD TITLE or
+ * NON INFRINGEMENT. See the GNU General Public License for
+ * more details.
+ */
+
+/* This file is machine-generated; DO NOT EDIT! */
+#include "gxio/iorpc_globals.h"
+
+struct arm_pollfd_param {
+ union iorpc_pollfd pollfd;
+};
+
+int __iorpc_arm_pollfd(int fd, int pollfd_cookie)
+{
+ struct arm_pollfd_param temp;
+ struct arm_pollfd_param *params = &temp;
+
+ params->pollfd.kernel.cookie = pollfd_cookie;
+
+ return hv_dev_pwrite(fd, 0, (HV_VirtAddr) params, sizeof(*params),
+ IORPC_OP_ARM_POLLFD);
+}
+
+EXPORT_SYMBOL(__iorpc_arm_pollfd);
+
+struct close_pollfd_param {
+ union iorpc_pollfd pollfd;
+};
+
+int __iorpc_close_pollfd(int fd, int pollfd_cookie)
+{
+ struct close_pollfd_param temp;
+ struct close_pollfd_param *params = &temp;
+
+ params->pollfd.kernel.cookie = pollfd_cookie;
+
+ return hv_dev_pwrite(fd, 0, (HV_VirtAddr) params, sizeof(*params),
+ IORPC_OP_CLOSE_POLLFD);
+}
+
+EXPORT_SYMBOL(__iorpc_close_pollfd);
+
+struct get_mmio_base_param {
+ HV_PTE base;
+};
+
+int __iorpc_get_mmio_base(int fd, HV_PTE *base)
+{
+ int __result;
+ struct get_mmio_base_param temp;
+ struct get_mmio_base_param *params = &temp;
+
+ __result =
+ hv_dev_pread(fd, 0, (HV_VirtAddr) params, sizeof(*params),
+ IORPC_OP_GET_MMIO_BASE);
+ *base = params->base;
+
+ return __result;
+}
+
+EXPORT_SYMBOL(__iorpc_get_mmio_base);
+
+struct check_mmio_offset_param {
+ unsigned long offset;
+ unsigned long size;
+};
+
+int __iorpc_check_mmio_offset(int fd, unsigned long offset, unsigned long size)
+{
+ struct check_mmio_offset_param temp;
+ struct check_mmio_offset_param *params = &temp;
+
+ params->offset = offset;
+ params->size = size;
+
+ return hv_dev_pwrite(fd, 0, (HV_VirtAddr) params, sizeof(*params),
+ IORPC_OP_CHECK_MMIO_OFFSET);
+}
+
+EXPORT_SYMBOL(__iorpc_check_mmio_offset);
diff --git a/arch/tile/gxio/kiorpc.c b/arch/tile/gxio/kiorpc.c
new file mode 100644
index 00000000000..c8096aa5a3f
--- /dev/null
+++ b/arch/tile/gxio/kiorpc.c
@@ -0,0 +1,61 @@
+/*
+ * Copyright 2012 Tilera Corporation. All Rights Reserved.
+ *
+ * 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, version 2.
+ *
+ * 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, GOOD TITLE or
+ * NON INFRINGEMENT. See the GNU General Public License for
+ * more details.
+ *
+ * TILE-Gx IORPC support for kernel I/O drivers.
+ */
+
+#include <linux/mmzone.h>
+#include <linux/module.h>
+#include <linux/io.h>
+#include <gxio/iorpc_globals.h>
+#include <gxio/kiorpc.h>
+
+#ifdef DEBUG_IORPC
+#define TRACE(FMT, ...) pr_info(SIMPLE_MSG_LINE FMT, ## __VA_ARGS__)
+#else
+#define TRACE(...)
+#endif
+
+/* Create kernel-VA-space MMIO mapping for an on-chip IO device. */
+void __iomem *iorpc_ioremap(int hv_fd, resource_size_t offset,
+ unsigned long size)
+{
+ pgprot_t mmio_base, prot = { 0 };
+ unsigned long pfn;
+ int err;
+
+ /* Look up the shim's lotar and base PA. */
+ err = __iorpc_get_mmio_base(hv_fd, &mmio_base);
+ if (err) {
+ TRACE("get_mmio_base() failure: %d\n", err);
+ return NULL;
+ }
+
+ /* Make sure the HV driver approves of our offset and size. */
+ err = __iorpc_check_mmio_offset(hv_fd, offset, size);
+ if (err) {
+ TRACE("check_mmio_offset() failure: %d\n", err);
+ return NULL;
+ }
+
+ /*
+ * mmio_base contains a base pfn and homing coordinates. Turn
+ * it into an MMIO pgprot and offset pfn.
+ */
+ prot = hv_pte_set_lotar(prot, hv_pte_get_lotar(mmio_base));
+ pfn = pte_pfn(mmio_base) + PFN_DOWN(offset);
+
+ return ioremap_prot(PFN_PHYS(pfn), size, prot);
+}
+
+EXPORT_SYMBOL(iorpc_ioremap);