/*
- * IBM PowerPC iSeries Virtual I/O Infrastructure Support.
+ * Legacy iSeries specific vio initialisation
+ * that needs to be built in (not a module).
*
- * Copyright (c) 2005 Stephen Rothwell, IBM Corp.
+ * © Copyright 2007 IBM Corporation
+ * Author: Stephen Rothwell
+ * Some parts collected from various other files
*
- * 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 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
-#include <linux/types.h>
-#include <linux/device.h>
+#include <linux/of.h>
#include <linux/init.h>
+#include <linux/gfp.h>
+#include <linux/completion.h>
+#include <linux/proc_fs.h>
-#include <asm/vio.h>
-#include <asm/iommu.h>
-#include <asm/tce.h>
-#include <asm/abs_addr.h>
-#include <asm/page.h>
+#include <asm/firmware.h>
#include <asm/iseries/vio.h>
+#include <asm/iseries/iommu.h>
#include <asm/iseries/hv_types.h>
-#include <asm/iseries/hv_lp_config.h>
-#include <asm/iseries/hv_call_xm.h>
+#include <asm/iseries/hv_lp_event.h>
-struct device *iSeries_vio_dev = &vio_bus_device.dev;
-EXPORT_SYMBOL(iSeries_vio_dev);
+#define FIRST_VTY 0
+#define NUM_VTYS 1
+#define FIRST_VSCSI (FIRST_VTY + NUM_VTYS)
+#define NUM_VSCSIS 1
+#define FIRST_VLAN (FIRST_VSCSI + NUM_VSCSIS)
+#define NUM_VLANS HVMAXARCHITECTEDVIRTUALLANS
+#define FIRST_VIODASD (FIRST_VLAN + NUM_VLANS)
+#define NUM_VIODASDS HVMAXARCHITECTEDVIRTUALDISKS
+#define FIRST_VIOCD (FIRST_VIODASD + NUM_VIODASDS)
+#define NUM_VIOCDS HVMAXARCHITECTEDVIRTUALCDROMS
+#define FIRST_VIOTAPE (FIRST_VIOCD + NUM_VIOCDS)
+#define NUM_VIOTAPES HVMAXARCHITECTEDVIRTUALTAPES
-static struct iommu_table veth_iommu_table;
-static struct iommu_table vio_iommu_table;
+struct vio_waitevent {
+ struct completion com;
+ int rc;
+ u16 sub_result;
+};
+
+struct vio_resource {
+ char rsrcname[10];
+ char type[4];
+ char model[3];
+};
-static void __init iommu_vio_init(void)
+static struct property * __init new_property(const char *name, int length,
+ const void *value)
{
- struct iommu_table *t;
- struct iommu_table_cb cb;
- unsigned long cbp;
- unsigned long itc_entries;
-
- cb.itc_busno = 255; /* Bus 255 is the virtual bus */
- cb.itc_virtbus = 0xff; /* Ask for virtual bus */
-
- cbp = virt_to_abs(&cb);
- HvCallXm_getTceTableParms(cbp);
-
- itc_entries = cb.itc_size * PAGE_SIZE / sizeof(union tce_entry);
- veth_iommu_table.it_size = itc_entries / 2;
- veth_iommu_table.it_busno = cb.itc_busno;
- veth_iommu_table.it_offset = cb.itc_offset;
- veth_iommu_table.it_index = cb.itc_index;
- veth_iommu_table.it_type = TCE_VB;
- veth_iommu_table.it_blocksize = 1;
-
- t = iommu_init_table(&veth_iommu_table);
-
- if (!t)
- printk("Virtual Bus VETH TCE table failed.\n");
-
- vio_iommu_table.it_size = itc_entries - veth_iommu_table.it_size;
- vio_iommu_table.it_busno = cb.itc_busno;
- vio_iommu_table.it_offset = cb.itc_offset +
- veth_iommu_table.it_size;
- vio_iommu_table.it_index = cb.itc_index;
- vio_iommu_table.it_type = TCE_VB;
- vio_iommu_table.it_blocksize = 1;
-
- t = iommu_init_table(&vio_iommu_table);
-
- if (!t)
- printk("Virtual Bus VIO TCE table failed.\n");
+ struct property *np = kzalloc(sizeof(*np) + strlen(name) + 1 + length,
+ GFP_KERNEL);
+
+ if (!np)
+ return NULL;
+ np->name = (char *)(np + 1);
+ np->value = np->name + strlen(name) + 1;
+ strcpy(np->name, name);
+ memcpy(np->value, value, length);
+ np->length = length;
+ return np;
}
-/**
- * vio_register_device_iseries: - Register a new iSeries vio device.
- * @voidev: The device to register.
- */
-static struct vio_dev *__init vio_register_device_iseries(char *type,
- uint32_t unit_num)
+static void __init free_property(struct property *np)
+{
+ kfree(np);
+}
+
+static struct device_node * __init new_node(const char *path,
+ struct device_node *parent)
{
- struct vio_dev *viodev;
+ struct device_node *np = kzalloc(sizeof(*np), GFP_KERNEL);
- /* allocate a vio_dev for this device */
- viodev = kmalloc(sizeof(struct vio_dev), GFP_KERNEL);
- if (!viodev)
+ if (!np)
+ return NULL;
+ np->full_name = kmalloc(strlen(path) + 1, GFP_KERNEL);
+ if (!np->full_name) {
+ kfree(np);
return NULL;
- memset(viodev, 0, sizeof(struct vio_dev));
+ }
+ strcpy(np->full_name, path);
+ of_node_set_flag(np, OF_DYNAMIC);
+ kref_init(&np->kref);
+ np->parent = of_node_get(parent);
+ return np;
+}
- snprintf(viodev->dev.bus_id, BUS_ID_SIZE, "%s%d", type, unit_num);
+static void __init free_node(struct device_node *np)
+{
+ struct property *next;
+ struct property *prop;
- viodev->name = viodev->dev.bus_id;
- viodev->type = type;
- viodev->unit_address = unit_num;
- viodev->iommu_table = &vio_iommu_table;
- if (vio_register_device(viodev) == NULL) {
- kfree(viodev);
- return NULL;
+ next = np->properties;
+ while (next) {
+ prop = next;
+ next = prop->next;
+ free_property(prop);
}
- return viodev;
+ of_node_put(np->parent);
+ kfree(np->full_name);
+ kfree(np);
+}
+
+static int __init add_string_property(struct device_node *np, const char *name,
+ const char *value)
+{
+ struct property *nprop = new_property(name, strlen(value) + 1, value);
+
+ if (!nprop)
+ return 0;
+ prom_add_property(np, nprop);
+ return 1;
}
-void __init probe_bus_iseries(void)
+static int __init add_raw_property(struct device_node *np, const char *name,
+ int length, const void *value)
{
- HvLpIndexMap vlan_map;
- struct vio_dev *viodev;
- int i;
-
- /* there is only one of each of these */
- vio_register_device_iseries("viocons", 0);
- vio_register_device_iseries("vscsi", 0);
-
- vlan_map = HvLpConfig_getVirtualLanIndexMap();
- for (i = 0; i < HVMAXARCHITECTEDVIRTUALLANS; i++) {
- if ((vlan_map & (0x8000 >> i)) == 0)
- continue;
- viodev = vio_register_device_iseries("vlan", i);
- /* veth is special and has it own iommu_table */
- viodev->iommu_table = &veth_iommu_table;
+ struct property *nprop = new_property(name, length, value);
+
+ if (!nprop)
+ return 0;
+ prom_add_property(np, nprop);
+ return 1;
+}
+
+static void __init handle_cd_event(struct HvLpEvent *event)
+{
+ struct viocdlpevent *bevent;
+ struct vio_waitevent *pwe;
+
+ if (!event)
+ /* Notification that a partition went away! */
+ return;
+
+ /* First, we should NEVER get an int here...only acks */
+ if (hvlpevent_is_int(event)) {
+ printk(KERN_WARNING "handle_cd_event: got an unexpected int\n");
+ if (hvlpevent_need_ack(event)) {
+ event->xRc = HvLpEvent_Rc_InvalidSubtype;
+ HvCallEvent_ackLpEvent(event);
+ }
+ return;
+ }
+
+ bevent = (struct viocdlpevent *)event;
+
+ switch (event->xSubtype & VIOMINOR_SUBTYPE_MASK) {
+ case viocdgetinfo:
+ pwe = (struct vio_waitevent *)event->xCorrelationToken;
+ pwe->rc = event->xRc;
+ pwe->sub_result = bevent->sub_result;
+ complete(&pwe->com);
+ break;
+
+ default:
+ printk(KERN_WARNING "handle_cd_event: "
+ "message with unexpected subtype %0x04X!\n",
+ event->xSubtype & VIOMINOR_SUBTYPE_MASK);
+ if (hvlpevent_need_ack(event)) {
+ event->xRc = HvLpEvent_Rc_InvalidSubtype;
+ HvCallEvent_ackLpEvent(event);
+ }
}
- for (i = 0; i < HVMAXARCHITECTEDVIRTUALDISKS; i++)
- vio_register_device_iseries("viodasd", i);
- for (i = 0; i < HVMAXARCHITECTEDVIRTUALCDROMS; i++)
- vio_register_device_iseries("viocd", i);
- for (i = 0; i < HVMAXARCHITECTEDVIRTUALTAPES; i++)
- vio_register_device_iseries("viotape", i);
}
-/**
- * vio_match_device_iseries: - Tell if a iSeries VIO device matches a
- * vio_device_id
- */
-static int vio_match_device_iseries(const struct vio_device_id *id,
- const struct vio_dev *dev)
+static void __init get_viocd_info(struct device_node *vio_root)
{
- return strncmp(dev->type, id->type, strlen(id->type)) == 0;
+ HvLpEvent_Rc hvrc;
+ u32 unit;
+ struct vio_waitevent we;
+ struct vio_resource *unitinfo;
+ dma_addr_t unitinfo_dmaaddr;
+ int ret;
+
+ ret = viopath_open(viopath_hostLp, viomajorsubtype_cdio, 2);
+ if (ret) {
+ printk(KERN_WARNING
+ "get_viocd_info: error opening path to host partition %d\n",
+ viopath_hostLp);
+ return;
+ }
+
+ /* Initialize our request handler */
+ vio_setHandler(viomajorsubtype_cdio, handle_cd_event);
+
+ unitinfo = iseries_hv_alloc(
+ sizeof(*unitinfo) * HVMAXARCHITECTEDVIRTUALCDROMS,
+ &unitinfo_dmaaddr, GFP_ATOMIC);
+ if (!unitinfo) {
+ printk(KERN_WARNING
+ "get_viocd_info: error allocating unitinfo\n");
+ goto clear_handler;
+ }
+
+ memset(unitinfo, 0, sizeof(*unitinfo) * HVMAXARCHITECTEDVIRTUALCDROMS);
+
+ init_completion(&we.com);
+
+ hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp,
+ HvLpEvent_Type_VirtualIo,
+ viomajorsubtype_cdio | viocdgetinfo,
+ HvLpEvent_AckInd_DoAck, HvLpEvent_AckType_ImmediateAck,
+ viopath_sourceinst(viopath_hostLp),
+ viopath_targetinst(viopath_hostLp),
+ (u64)&we, VIOVERSION << 16, unitinfo_dmaaddr, 0,
+ sizeof(*unitinfo) * HVMAXARCHITECTEDVIRTUALCDROMS, 0);
+ if (hvrc != HvLpEvent_Rc_Good) {
+ printk(KERN_WARNING
+ "get_viocd_info: cdrom error sending event. rc %d\n",
+ (int)hvrc);
+ goto hv_free;
+ }
+
+ wait_for_completion(&we.com);
+
+ if (we.rc) {
+ printk(KERN_WARNING "get_viocd_info: bad rc %d:0x%04X\n",
+ we.rc, we.sub_result);
+ goto hv_free;
+ }
+
+ for (unit = 0; (unit < HVMAXARCHITECTEDVIRTUALCDROMS) &&
+ unitinfo[unit].rsrcname[0]; unit++) {
+ struct device_node *np;
+ char name[64];
+ u32 reg = FIRST_VIOCD + unit;
+
+ snprintf(name, sizeof(name), "/vdevice/viocd@%08x", reg);
+ np = new_node(name, vio_root);
+ if (!np)
+ goto hv_free;
+ if (!add_string_property(np, "name", "viocd") ||
+ !add_string_property(np, "device_type", "block") ||
+ !add_string_property(np, "compatible",
+ "IBM,iSeries-viocd") ||
+ !add_raw_property(np, "reg", sizeof(reg), ®) ||
+ !add_raw_property(np, "linux,unit_address",
+ sizeof(unit), &unit) ||
+ !add_raw_property(np, "linux,vio_rsrcname",
+ sizeof(unitinfo[unit].rsrcname),
+ unitinfo[unit].rsrcname) ||
+ !add_raw_property(np, "linux,vio_type",
+ sizeof(unitinfo[unit].type),
+ unitinfo[unit].type) ||
+ !add_raw_property(np, "linux,vio_model",
+ sizeof(unitinfo[unit].model),
+ unitinfo[unit].model))
+ goto node_free;
+ np->name = of_get_property(np, "name", NULL);
+ np->type = of_get_property(np, "device_type", NULL);
+ of_attach_node(np);
+#ifdef CONFIG_PROC_DEVICETREE
+ if (vio_root->pde) {
+ struct proc_dir_entry *ent;
+
+ ent = proc_mkdir(strrchr(np->full_name, '/') + 1,
+ vio_root->pde);
+ if (ent)
+ proc_device_tree_add_node(np, ent);
+ }
+#endif
+ continue;
+
+ node_free:
+ free_node(np);
+ break;
+ }
+
+ hv_free:
+ iseries_hv_free(sizeof(*unitinfo) * HVMAXARCHITECTEDVIRTUALCDROMS,
+ unitinfo, unitinfo_dmaaddr);
+ clear_handler:
+ vio_clearHandler(viomajorsubtype_cdio);
+ viopath_close(viopath_hostLp, viomajorsubtype_cdio, 2);
}
-static struct vio_bus_ops vio_bus_ops_iseries = {
- .match = vio_match_device_iseries,
-};
+/* Handle interrupt events for tape */
+static void __init handle_tape_event(struct HvLpEvent *event)
+{
+ struct vio_waitevent *we;
+ struct viotapelpevent *tevent = (struct viotapelpevent *)event;
-/**
- * vio_bus_init_iseries: - Initialize the iSeries virtual IO bus
- */
-static int __init vio_bus_init_iseries(void)
+ if (event == NULL)
+ /* Notification that a partition went away! */
+ return;
+
+ we = (struct vio_waitevent *)event->xCorrelationToken;
+ switch (event->xSubtype & VIOMINOR_SUBTYPE_MASK) {
+ case viotapegetinfo:
+ we->rc = tevent->sub_type_result;
+ complete(&we->com);
+ break;
+ default:
+ printk(KERN_WARNING "handle_tape_event: weird ack\n");
+ }
+}
+
+static void __init get_viotape_info(struct device_node *vio_root)
{
- int err;
-
- err = vio_bus_init(&vio_bus_ops_iseries);
- if (err == 0) {
- iommu_vio_init();
- vio_bus_device.iommu_table = &vio_iommu_table;
- iSeries_vio_dev = &vio_bus_device.dev;
- probe_bus_iseries();
+ HvLpEvent_Rc hvrc;
+ u32 unit;
+ struct vio_resource *unitinfo;
+ dma_addr_t unitinfo_dmaaddr;
+ size_t len = sizeof(*unitinfo) * HVMAXARCHITECTEDVIRTUALTAPES;
+ struct vio_waitevent we;
+ int ret;
+
+ ret = viopath_open(viopath_hostLp, viomajorsubtype_tape, 2);
+ if (ret) {
+ printk(KERN_WARNING "get_viotape_info: "
+ "error on viopath_open to hostlp %d\n", ret);
+ return;
}
- return err;
+
+ vio_setHandler(viomajorsubtype_tape, handle_tape_event);
+
+ unitinfo = iseries_hv_alloc(len, &unitinfo_dmaaddr, GFP_ATOMIC);
+ if (!unitinfo)
+ goto clear_handler;
+
+ memset(unitinfo, 0, len);
+
+ hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp,
+ HvLpEvent_Type_VirtualIo,
+ viomajorsubtype_tape | viotapegetinfo,
+ HvLpEvent_AckInd_DoAck, HvLpEvent_AckType_ImmediateAck,
+ viopath_sourceinst(viopath_hostLp),
+ viopath_targetinst(viopath_hostLp),
+ (u64)(unsigned long)&we, VIOVERSION << 16,
+ unitinfo_dmaaddr, len, 0, 0);
+ if (hvrc != HvLpEvent_Rc_Good) {
+ printk(KERN_WARNING "get_viotape_info: hv error on op %d\n",
+ (int)hvrc);
+ goto hv_free;
+ }
+
+ wait_for_completion(&we.com);
+
+ for (unit = 0; (unit < HVMAXARCHITECTEDVIRTUALTAPES) &&
+ unitinfo[unit].rsrcname[0]; unit++) {
+ struct device_node *np;
+ char name[64];
+ u32 reg = FIRST_VIOTAPE + unit;
+
+ snprintf(name, sizeof(name), "/vdevice/viotape@%08x", reg);
+ np = new_node(name, vio_root);
+ if (!np)
+ goto hv_free;
+ if (!add_string_property(np, "name", "viotape") ||
+ !add_string_property(np, "device_type", "byte") ||
+ !add_string_property(np, "compatible",
+ "IBM,iSeries-viotape") ||
+ !add_raw_property(np, "reg", sizeof(reg), ®) ||
+ !add_raw_property(np, "linux,unit_address",
+ sizeof(unit), &unit) ||
+ !add_raw_property(np, "linux,vio_rsrcname",
+ sizeof(unitinfo[unit].rsrcname),
+ unitinfo[unit].rsrcname) ||
+ !add_raw_property(np, "linux,vio_type",
+ sizeof(unitinfo[unit].type),
+ unitinfo[unit].type) ||
+ !add_raw_property(np, "linux,vio_model",
+ sizeof(unitinfo[unit].model),
+ unitinfo[unit].model))
+ goto node_free;
+ np->name = of_get_property(np, "name", NULL);
+ np->type = of_get_property(np, "device_type", NULL);
+ of_attach_node(np);
+#ifdef CONFIG_PROC_DEVICETREE
+ if (vio_root->pde) {
+ struct proc_dir_entry *ent;
+
+ ent = proc_mkdir(strrchr(np->full_name, '/') + 1,
+ vio_root->pde);
+ if (ent)
+ proc_device_tree_add_node(np, ent);
+ }
+#endif
+ continue;
+
+ node_free:
+ free_node(np);
+ break;
+ }
+
+ hv_free:
+ iseries_hv_free(len, unitinfo, unitinfo_dmaaddr);
+ clear_handler:
+ vio_clearHandler(viomajorsubtype_tape);
+ viopath_close(viopath_hostLp, viomajorsubtype_tape, 2);
}
-__initcall(vio_bus_init_iseries);
+static int __init iseries_vio_init(void)
+{
+ struct device_node *vio_root;
+
+ if (!firmware_has_feature(FW_FEATURE_ISERIES))
+ return -ENODEV;
+
+ iommu_vio_init();
+
+ vio_root = of_find_node_by_path("/vdevice");
+ if (!vio_root)
+ return -ENODEV;
+
+ if (viopath_hostLp == HvLpIndexInvalid) {
+ vio_set_hostlp();
+ /* If we don't have a host, bail out */
+ if (viopath_hostLp == HvLpIndexInvalid)
+ goto put_node;
+ }
+
+ get_viocd_info(vio_root);
+ get_viotape_info(vio_root);
+
+ return 0;
+
+ put_node:
+ of_node_put(vio_root);
+ return -ENODEV;
+}
+arch_initcall(iseries_vio_init);
projects / linux-2.6-omap-h63xx.git / blobdiff