arch/tile: provide kernel support for the tilegx TRIO shim

Provide kernel support for the tilegx "Transaction I/O" (TRIO) on-chip
hardware.  This hardware implements the PCIe interface for tilegx;
the driver changes to use TRIO for PCIe are in a subsequent commit.

The change is layered on top of the tilegx GXIO IORPC subsystem.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>

4 files changed, 383 insertions, 0 deletions

diff --git a/arch/tile/gxio/Kconfig b/arch/tile/gxio/Kconfig
index 8aeebb70a3df..68e1cca2cce5 100644
--- a/arch/tile/gxio/Kconfig
+++ b/arch/tile/gxio/Kconfig
@@ -15,3 +15,9 @@ config TILE_GXIO_MPIPE
         bool
         select TILE_GXIO
         select TILE_GXIO_DMA
+
+# Support direct access to the TILE-Gx TRIO hardware from kernel space.
+config TILE_GXIO_TRIO
+        bool
+        select TILE_GXIO
+        select TILE_GXIO_DMA
diff --git a/arch/tile/gxio/Makefile b/arch/tile/gxio/Makefile
index 130eec48c152..2389ef307c73 100644
--- a/arch/tile/gxio/Makefile
+++ b/arch/tile/gxio/Makefile
@@ -5,3 +5,4 @@
 obj-$(CONFIG_TILE_GXIO) += iorpc_globals.o kiorpc.o
 obj-$(CONFIG_TILE_GXIO_DMA) += dma_queue.o
 obj-$(CONFIG_TILE_GXIO_MPIPE) += mpipe.o iorpc_mpipe.o iorpc_mpipe_info.o
+obj-$(CONFIG_TILE_GXIO_TRIO) += trio.o iorpc_trio.o
diff --git a/arch/tile/gxio/iorpc_trio.c b/arch/tile/gxio/iorpc_trio.c
new file mode 100644
index 000000000000..cef4b2209cda
--- /dev/null
+++ b/arch/tile/gxio/iorpc_trio.c
@@ -0,0 +1,327 @@
+/*
+ * 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_trio.h"
+
+struct alloc_asids_param {
+        unsigned int count;
+        unsigned int first;
+        unsigned int flags;
+};
+
+int gxio_trio_alloc_asids(gxio_trio_context_t * context, unsigned int count,
+                          unsigned int first, unsigned int flags)
+{
+        struct alloc_asids_param temp;
+        struct alloc_asids_param *params = &temp;
+
+        params->count = count;
+        params->first = first;
+        params->flags = flags;
+
+        return hv_dev_pwrite(context->fd, 0, (HV_VirtAddr) params,
+                             sizeof(*params), GXIO_TRIO_OP_ALLOC_ASIDS);
+}
+
+EXPORT_SYMBOL(gxio_trio_alloc_asids);
+
+
+struct alloc_memory_maps_param {
+        unsigned int count;
+        unsigned int first;
+        unsigned int flags;
+};
+
+int gxio_trio_alloc_memory_maps(gxio_trio_context_t * context,
+                                unsigned int count, unsigned int first,
+                                unsigned int flags)
+{
+        struct alloc_memory_maps_param temp;
+        struct alloc_memory_maps_param *params = &temp;
+
+        params->count = count;
+        params->first = first;
+        params->flags = flags;
+
+        return hv_dev_pwrite(context->fd, 0, (HV_VirtAddr) params,
+                             sizeof(*params), GXIO_TRIO_OP_ALLOC_MEMORY_MAPS);
+}
+
+EXPORT_SYMBOL(gxio_trio_alloc_memory_maps);
+
+
+struct alloc_pio_regions_param {
+        unsigned int count;
+        unsigned int first;
+        unsigned int flags;
+};
+
+int gxio_trio_alloc_pio_regions(gxio_trio_context_t * context,
+                                unsigned int count, unsigned int first,
+                                unsigned int flags)
+{
+        struct alloc_pio_regions_param temp;
+        struct alloc_pio_regions_param *params = &temp;
+
+        params->count = count;
+        params->first = first;
+        params->flags = flags;
+
+        return hv_dev_pwrite(context->fd, 0, (HV_VirtAddr) params,
+                             sizeof(*params), GXIO_TRIO_OP_ALLOC_PIO_REGIONS);
+}
+
+EXPORT_SYMBOL(gxio_trio_alloc_pio_regions);
+
+struct init_pio_region_aux_param {
+        unsigned int pio_region;
+        unsigned int mac;
+        uint32_t bus_address_hi;
+        unsigned int flags;
+};
+
+int gxio_trio_init_pio_region_aux(gxio_trio_context_t * context,
+                                  unsigned int pio_region, unsigned int mac,
+                                  uint32_t bus_address_hi, unsigned int flags)
+{
+        struct init_pio_region_aux_param temp;
+        struct init_pio_region_aux_param *params = &temp;
+
+        params->pio_region = pio_region;
+        params->mac = mac;
+        params->bus_address_hi = bus_address_hi;
+        params->flags = flags;
+
+        return hv_dev_pwrite(context->fd, 0, (HV_VirtAddr) params,
+                             sizeof(*params), GXIO_TRIO_OP_INIT_PIO_REGION_AUX);
+}
+
+EXPORT_SYMBOL(gxio_trio_init_pio_region_aux);
+
+
+struct init_memory_map_mmu_aux_param {
+        unsigned int map;
+        unsigned long va;
+        uint64_t size;
+        unsigned int asid;
+        unsigned int mac;
+        uint64_t bus_address;
+        unsigned int node;
+        unsigned int order_mode;
+};
+
+int gxio_trio_init_memory_map_mmu_aux(gxio_trio_context_t * context,
+                                      unsigned int map, unsigned long va,
+                                      uint64_t size, unsigned int asid,
+                                      unsigned int mac, uint64_t bus_address,
+                                      unsigned int node,
+                                      unsigned int order_mode)
+{
+        struct init_memory_map_mmu_aux_param temp;
+        struct init_memory_map_mmu_aux_param *params = &temp;
+
+        params->map = map;
+        params->va = va;
+        params->size = size;
+        params->asid = asid;
+        params->mac = mac;
+        params->bus_address = bus_address;
+        params->node = node;
+        params->order_mode = order_mode;
+
+        return hv_dev_pwrite(context->fd, 0, (HV_VirtAddr) params,
+                             sizeof(*params),
+                             GXIO_TRIO_OP_INIT_MEMORY_MAP_MMU_AUX);
+}
+
+EXPORT_SYMBOL(gxio_trio_init_memory_map_mmu_aux);
+
+struct get_port_property_param {
+        struct pcie_trio_ports_property trio_ports;
+};
+
+int gxio_trio_get_port_property(gxio_trio_context_t * context,
+                                struct pcie_trio_ports_property *trio_ports)
+{
+        int __result;
+        struct get_port_property_param temp;
+        struct get_port_property_param *params = &temp;
+
+        __result =
+            hv_dev_pread(context->fd, 0, (HV_VirtAddr) params, sizeof(*params),
+                         GXIO_TRIO_OP_GET_PORT_PROPERTY);
+        *trio_ports = params->trio_ports;
+
+        return __result;
+}
+
+EXPORT_SYMBOL(gxio_trio_get_port_property);
+
+struct config_legacy_intr_param {
+        union iorpc_interrupt interrupt;
+        unsigned int mac;
+        unsigned int intx;
+};
+
+int gxio_trio_config_legacy_intr(gxio_trio_context_t * context, int inter_x,
+                                 int inter_y, int inter_ipi, int inter_event,
+                                 unsigned int mac, unsigned int intx)
+{
+        struct config_legacy_intr_param temp;
+        struct config_legacy_intr_param *params = &temp;
+
+        params->interrupt.kernel.x = inter_x;
+        params->interrupt.kernel.y = inter_y;
+        params->interrupt.kernel.ipi = inter_ipi;
+        params->interrupt.kernel.event = inter_event;
+        params->mac = mac;
+        params->intx = intx;
+
+        return hv_dev_pwrite(context->fd, 0, (HV_VirtAddr) params,
+                             sizeof(*params), GXIO_TRIO_OP_CONFIG_LEGACY_INTR);
+}
+
+EXPORT_SYMBOL(gxio_trio_config_legacy_intr);
+
+struct config_msi_intr_param {
+        union iorpc_interrupt interrupt;
+        unsigned int mac;
+        unsigned int mem_map;
+        uint64_t mem_map_base;
+        uint64_t mem_map_limit;
+        unsigned int asid;
+};
+
+int gxio_trio_config_msi_intr(gxio_trio_context_t * context, int inter_x,
+                              int inter_y, int inter_ipi, int inter_event,
+                              unsigned int mac, unsigned int mem_map,
+                              uint64_t mem_map_base, uint64_t mem_map_limit,
+                              unsigned int asid)
+{
+        struct config_msi_intr_param temp;
+        struct config_msi_intr_param *params = &temp;
+
+        params->interrupt.kernel.x = inter_x;
+        params->interrupt.kernel.y = inter_y;
+        params->interrupt.kernel.ipi = inter_ipi;
+        params->interrupt.kernel.event = inter_event;
+        params->mac = mac;
+        params->mem_map = mem_map;
+        params->mem_map_base = mem_map_base;
+        params->mem_map_limit = mem_map_limit;
+        params->asid = asid;
+
+        return hv_dev_pwrite(context->fd, 0, (HV_VirtAddr) params,
+                             sizeof(*params), GXIO_TRIO_OP_CONFIG_MSI_INTR);
+}
+
+EXPORT_SYMBOL(gxio_trio_config_msi_intr);
+
+
+struct set_mps_mrs_param {
+        uint16_t mps;
+        uint16_t mrs;
+        unsigned int mac;
+};
+
+int gxio_trio_set_mps_mrs(gxio_trio_context_t * context, uint16_t mps,
+                          uint16_t mrs, unsigned int mac)
+{
+        struct set_mps_mrs_param temp;
+        struct set_mps_mrs_param *params = &temp;
+
+        params->mps = mps;
+        params->mrs = mrs;
+        params->mac = mac;
+
+        return hv_dev_pwrite(context->fd, 0, (HV_VirtAddr) params,
+                             sizeof(*params), GXIO_TRIO_OP_SET_MPS_MRS);
+}
+
+EXPORT_SYMBOL(gxio_trio_set_mps_mrs);
+
+struct force_rc_link_up_param {
+        unsigned int mac;
+};
+
+int gxio_trio_force_rc_link_up(gxio_trio_context_t * context, unsigned int mac)
+{
+        struct force_rc_link_up_param temp;
+        struct force_rc_link_up_param *params = &temp;
+
+        params->mac = mac;
+
+        return hv_dev_pwrite(context->fd, 0, (HV_VirtAddr) params,
+                             sizeof(*params), GXIO_TRIO_OP_FORCE_RC_LINK_UP);
+}
+
+EXPORT_SYMBOL(gxio_trio_force_rc_link_up);
+
+struct force_ep_link_up_param {
+        unsigned int mac;
+};
+
+int gxio_trio_force_ep_link_up(gxio_trio_context_t * context, unsigned int mac)
+{
+        struct force_ep_link_up_param temp;
+        struct force_ep_link_up_param *params = &temp;
+
+        params->mac = mac;
+
+        return hv_dev_pwrite(context->fd, 0, (HV_VirtAddr) params,
+                             sizeof(*params), GXIO_TRIO_OP_FORCE_EP_LINK_UP);
+}
+
+EXPORT_SYMBOL(gxio_trio_force_ep_link_up);
+
+struct get_mmio_base_param {
+        HV_PTE base;
+};
+
+int gxio_trio_get_mmio_base(gxio_trio_context_t * context, HV_PTE *base)
+{
+        int __result;
+        struct get_mmio_base_param temp;
+        struct get_mmio_base_param *params = &temp;
+
+        __result =
+            hv_dev_pread(context->fd, 0, (HV_VirtAddr) params, sizeof(*params),
+                         GXIO_TRIO_OP_GET_MMIO_BASE);
+        *base = params->base;
+
+        return __result;
+}
+
+EXPORT_SYMBOL(gxio_trio_get_mmio_base);
+
+struct check_mmio_offset_param {
+        unsigned long offset;
+        unsigned long size;
+};
+
+int gxio_trio_check_mmio_offset(gxio_trio_context_t * context,
+                                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(context->fd, 0, (HV_VirtAddr) params,
+                             sizeof(*params), GXIO_TRIO_OP_CHECK_MMIO_OFFSET);
+}
+
+EXPORT_SYMBOL(gxio_trio_check_mmio_offset);
diff --git a/arch/tile/gxio/trio.c b/arch/tile/gxio/trio.c
new file mode 100644
index 000000000000..69f0b8df3ce3
--- /dev/null
+++ b/arch/tile/gxio/trio.c
@@ -0,0 +1,49 @@
+/*
+ * 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.
+ */
+
+/*
+ * Implementation of trio gxio calls.
+ */
+
+#include <linux/errno.h>
+#include <linux/io.h>
+#include <linux/module.h>
+
+#include <gxio/trio.h>
+#include <gxio/iorpc_globals.h>
+#include <gxio/iorpc_trio.h>
+#include <gxio/kiorpc.h>
+
+int gxio_trio_init(gxio_trio_context_t *context, unsigned int trio_index)
+{
+        char file[32];
+        int fd;
+
+        snprintf(file, sizeof(file), "trio/%d/iorpc", trio_index);
+        fd = hv_dev_open((HV_VirtAddr) file, 0);
+        if (fd < 0) {
+                context->fd = -1;
+
+                if (fd >= GXIO_ERR_MIN && fd <= GXIO_ERR_MAX)
+                        return fd;
+                else
+                        return -ENODEV;
+        }
+
+        context->fd = fd;
+
+        return 0;
+}
+
+EXPORT_SYMBOL_GPL(gxio_trio_init);