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Diffstat (limited to 'arch/ppc64/kernel/vio.c')
| -rw-r--r-- | arch/ppc64/kernel/vio.c | 635 |
1 files changed, 0 insertions, 635 deletions
diff --git a/arch/ppc64/kernel/vio.c b/arch/ppc64/kernel/vio.c deleted file mode 100644 index 0c0ba71ac0e..00000000000 --- a/arch/ppc64/kernel/vio.c +++ /dev/null @@ -1,635 +0,0 @@ -/* - * IBM PowerPC Virtual I/O Infrastructure Support. - * - * Copyright (c) 2003 IBM Corp. - * Dave Engebretsen engebret@us.ibm.com - * Santiago Leon santil@us.ibm.com - * Hollis Blanchard <hollisb@us.ibm.com> - * - * 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. - */ - -#include <linux/init.h> -#include <linux/console.h> -#include <linux/version.h> -#include <linux/module.h> -#include <linux/kobject.h> -#include <linux/mm.h> -#include <linux/dma-mapping.h> -#include <asm/rtas.h> -#include <asm/iommu.h> -#include <asm/dma.h> -#include <asm/ppcdebug.h> -#include <asm/vio.h> -#include <asm/hvcall.h> -#include <asm/iSeries/vio.h> -#include <asm/iSeries/HvTypes.h> -#include <asm/iSeries/HvCallXm.h> -#include <asm/iSeries/HvLpConfig.h> - -#define DBGENTER() pr_debug("%s entered\n", __FUNCTION__) - -extern struct subsystem devices_subsys; /* needed for vio_find_name() */ - -static const struct vio_device_id *vio_match_device( - const struct vio_device_id *, const struct vio_dev *); - -#ifdef CONFIG_PPC_PSERIES -static struct iommu_table *vio_build_iommu_table(struct vio_dev *); -static int vio_num_address_cells; -#endif -#ifdef CONFIG_PPC_ISERIES -static struct iommu_table veth_iommu_table; -static struct iommu_table vio_iommu_table; -#endif -static struct vio_dev vio_bus_device = { /* fake "parent" device */ - .name = vio_bus_device.dev.bus_id, - .type = "", -#ifdef CONFIG_PPC_ISERIES - .iommu_table = &vio_iommu_table, -#endif - .dev.bus_id = "vio", - .dev.bus = &vio_bus_type, -}; - -#ifdef CONFIG_PPC_ISERIES -static struct vio_dev *__init vio_register_device_iseries(char *type, - uint32_t unit_num); - -struct device *iSeries_vio_dev = &vio_bus_device.dev; -EXPORT_SYMBOL(iSeries_vio_dev); - -#define device_is_compatible(a, b) 1 - -#endif - -/* convert from struct device to struct vio_dev and pass to driver. - * dev->driver has already been set by generic code because vio_bus_match - * succeeded. */ -static int vio_bus_probe(struct device *dev) -{ - struct vio_dev *viodev = to_vio_dev(dev); - struct vio_driver *viodrv = to_vio_driver(dev->driver); - const struct vio_device_id *id; - int error = -ENODEV; - - DBGENTER(); - - if (!viodrv->probe) - return error; - - id = vio_match_device(viodrv->id_table, viodev); - if (id) { - error = viodrv->probe(viodev, id); - } - - return error; -} - -/* convert from struct device to struct vio_dev and pass to driver. */ -static int vio_bus_remove(struct device *dev) -{ - struct vio_dev *viodev = to_vio_dev(dev); - struct vio_driver *viodrv = to_vio_driver(dev->driver); - - DBGENTER(); - - if (viodrv->remove) { - return viodrv->remove(viodev); - } - - /* driver can't remove */ - return 1; -} - -/** - * vio_register_driver: - Register a new vio driver - * @drv: The vio_driver structure to be registered. - */ -int vio_register_driver(struct vio_driver *viodrv) -{ - printk(KERN_DEBUG "%s: driver %s registering\n", __FUNCTION__, - viodrv->name); - - /* fill in 'struct driver' fields */ - viodrv->driver.name = viodrv->name; - viodrv->driver.bus = &vio_bus_type; - viodrv->driver.probe = vio_bus_probe; - viodrv->driver.remove = vio_bus_remove; - - return driver_register(&viodrv->driver); -} -EXPORT_SYMBOL(vio_register_driver); - -/** - * vio_unregister_driver - Remove registration of vio driver. - * @driver: The vio_driver struct to be removed form registration - */ -void vio_unregister_driver(struct vio_driver *viodrv) -{ - driver_unregister(&viodrv->driver); -} -EXPORT_SYMBOL(vio_unregister_driver); - -/** - * vio_match_device: - Tell if a VIO device has a matching VIO device id structure. - * @ids: array of VIO device id structures to search in - * @dev: the VIO device structure to match against - * - * Used by a driver to check whether a VIO device present in the - * system is in its list of supported devices. Returns the matching - * vio_device_id structure or NULL if there is no match. - */ -static const struct vio_device_id * vio_match_device(const struct vio_device_id *ids, - const struct vio_dev *dev) -{ - DBGENTER(); - - while (ids->type) { - if ((strncmp(dev->type, ids->type, strlen(ids->type)) == 0) && - device_is_compatible(dev->dev.platform_data, ids->compat)) - return ids; - ids++; - } - return NULL; -} - -#ifdef CONFIG_PPC_ISERIES -void __init iommu_vio_init(void) -{ - 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"); -} -#endif - -#ifdef CONFIG_PPC_PSERIES -static void probe_bus_pseries(void) -{ - struct device_node *node_vroot, *of_node; - - node_vroot = find_devices("vdevice"); - if ((node_vroot == NULL) || (node_vroot->child == NULL)) - /* this machine doesn't do virtual IO, and that's ok */ - return; - - vio_num_address_cells = prom_n_addr_cells(node_vroot->child); - - /* - * Create struct vio_devices for each virtual device in the device tree. - * Drivers will associate with them later. - */ - for (of_node = node_vroot->child; of_node != NULL; - of_node = of_node->sibling) { - printk(KERN_DEBUG "%s: processing %p\n", __FUNCTION__, of_node); - vio_register_device_node(of_node); - } -} -#endif - -#ifdef CONFIG_PPC_ISERIES -static void probe_bus_iseries(void) -{ - HvLpIndexMap vlan_map = HvLpConfig_getVirtualLanIndexMap(); - 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; - } - 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); -} -#endif - -/** - * vio_bus_init: - Initialize the virtual IO bus - */ -static int __init vio_bus_init(void) -{ - int err; - - err = bus_register(&vio_bus_type); - if (err) { - printk(KERN_ERR "failed to register VIO bus\n"); - return err; - } - - /* the fake parent of all vio devices, just to give us a nice directory */ - err = device_register(&vio_bus_device.dev); - if (err) { - printk(KERN_WARNING "%s: device_register returned %i\n", __FUNCTION__, - err); - return err; - } - -#ifdef CONFIG_PPC_PSERIES - probe_bus_pseries(); -#endif -#ifdef CONFIG_PPC_ISERIES - probe_bus_iseries(); -#endif - - return 0; -} - -__initcall(vio_bus_init); - -/* vio_dev refcount hit 0 */ -static void __devinit vio_dev_release(struct device *dev) -{ - DBGENTER(); - -#ifdef CONFIG_PPC_PSERIES - /* XXX free TCE table */ - of_node_put(dev->platform_data); -#endif - kfree(to_vio_dev(dev)); -} - -#ifdef CONFIG_PPC_PSERIES -static ssize_t viodev_show_devspec(struct device *dev, struct device_attribute *attr, char *buf) -{ - struct device_node *of_node = dev->platform_data; - - return sprintf(buf, "%s\n", of_node->full_name); -} -DEVICE_ATTR(devspec, S_IRUSR | S_IRGRP | S_IROTH, viodev_show_devspec, NULL); -#endif - -static ssize_t viodev_show_name(struct device *dev, struct device_attribute *attr, char *buf) -{ - return sprintf(buf, "%s\n", to_vio_dev(dev)->name); -} -DEVICE_ATTR(name, S_IRUSR | S_IRGRP | S_IROTH, viodev_show_name, NULL); - -static struct vio_dev * __devinit vio_register_device_common( - struct vio_dev *viodev, char *name, char *type, - uint32_t unit_address, struct iommu_table *iommu_table) -{ - DBGENTER(); - - viodev->name = name; - viodev->type = type; - viodev->unit_address = unit_address; - viodev->iommu_table = iommu_table; - /* init generic 'struct device' fields: */ - viodev->dev.parent = &vio_bus_device.dev; - viodev->dev.bus = &vio_bus_type; - viodev->dev.release = vio_dev_release; - - /* register with generic device framework */ - if (device_register(&viodev->dev)) { - printk(KERN_ERR "%s: failed to register device %s\n", - __FUNCTION__, viodev->dev.bus_id); - return NULL; - } - device_create_file(&viodev->dev, &dev_attr_name); - - return viodev; -} - -#ifdef CONFIG_PPC_PSERIES -/** - * vio_register_device_node: - Register a new vio device. - * @of_node: The OF node for this device. - * - * Creates and initializes a vio_dev structure from the data in - * of_node (dev.platform_data) and adds it to the list of virtual devices. - * Returns a pointer to the created vio_dev or NULL if node has - * NULL device_type or compatible fields. - */ -struct vio_dev * __devinit vio_register_device_node(struct device_node *of_node) -{ - struct vio_dev *viodev; - unsigned int *unit_address; - unsigned int *irq_p; - - DBGENTER(); - - /* we need the 'device_type' property, in order to match with drivers */ - if ((NULL == of_node->type)) { - printk(KERN_WARNING - "%s: node %s missing 'device_type'\n", __FUNCTION__, - of_node->name ? of_node->name : "<unknown>"); - return NULL; - } - - unit_address = (unsigned int *)get_property(of_node, "reg", NULL); - if (!unit_address) { - printk(KERN_WARNING "%s: node %s missing 'reg'\n", __FUNCTION__, - of_node->name ? of_node->name : "<unknown>"); - return NULL; - } - - /* allocate a vio_dev for this node */ - viodev = kmalloc(sizeof(struct vio_dev), GFP_KERNEL); - if (!viodev) { - return NULL; - } - memset(viodev, 0, sizeof(struct vio_dev)); - - viodev->dev.platform_data = of_node_get(of_node); - - viodev->irq = NO_IRQ; - irq_p = (unsigned int *)get_property(of_node, "interrupts", NULL); - if (irq_p) { - int virq = virt_irq_create_mapping(*irq_p); - if (virq == NO_IRQ) { - printk(KERN_ERR "Unable to allocate interrupt " - "number for %s\n", of_node->full_name); - } else - viodev->irq = irq_offset_up(virq); - } - - snprintf(viodev->dev.bus_id, BUS_ID_SIZE, "%x", *unit_address); - - /* register with generic device framework */ - if (vio_register_device_common(viodev, of_node->name, of_node->type, - *unit_address, vio_build_iommu_table(viodev)) - == NULL) { - /* XXX free TCE table */ - kfree(viodev); - return NULL; - } - device_create_file(&viodev->dev, &dev_attr_devspec); - - return viodev; -} -EXPORT_SYMBOL(vio_register_device_node); -#endif - -#ifdef CONFIG_PPC_ISERIES -/** - * vio_register_device: - Register a new vio device. - * @voidev: The device to register. - */ -static struct vio_dev *__init vio_register_device_iseries(char *type, - uint32_t unit_num) -{ - struct vio_dev *viodev; - - DBGENTER(); - - /* allocate a vio_dev for this node */ - viodev = kmalloc(sizeof(struct vio_dev), GFP_KERNEL); - if (!viodev) - return NULL; - memset(viodev, 0, sizeof(struct vio_dev)); - - snprintf(viodev->dev.bus_id, BUS_ID_SIZE, "%s%d", type, unit_num); - - return vio_register_device_common(viodev, viodev->dev.bus_id, type, - unit_num, &vio_iommu_table); -} -#endif - -void __devinit vio_unregister_device(struct vio_dev *viodev) -{ - DBGENTER(); -#ifdef CONFIG_PPC_PSERIES - device_remove_file(&viodev->dev, &dev_attr_devspec); -#endif - device_remove_file(&viodev->dev, &dev_attr_name); - device_unregister(&viodev->dev); -} -EXPORT_SYMBOL(vio_unregister_device); - -#ifdef CONFIG_PPC_PSERIES -/** - * vio_get_attribute: - get attribute for virtual device - * @vdev: The vio device to get property. - * @which: The property/attribute to be extracted. - * @length: Pointer to length of returned data size (unused if NULL). - * - * Calls prom.c's get_property() to return the value of the - * attribute specified by the preprocessor constant @which -*/ -const void * vio_get_attribute(struct vio_dev *vdev, void* which, int* length) -{ - return get_property(vdev->dev.platform_data, (char*)which, length); -} -EXPORT_SYMBOL(vio_get_attribute); - -/* vio_find_name() - internal because only vio.c knows how we formatted the - * kobject name - * XXX once vio_bus_type.devices is actually used as a kset in - * drivers/base/bus.c, this function should be removed in favor of - * "device_find(kobj_name, &vio_bus_type)" - */ -static struct vio_dev *vio_find_name(const char *kobj_name) -{ - struct kobject *found; - - found = kset_find_obj(&devices_subsys.kset, kobj_name); - if (!found) - return NULL; - - return to_vio_dev(container_of(found, struct device, kobj)); -} - -/** - * vio_find_node - find an already-registered vio_dev - * @vnode: device_node of the virtual device we're looking for - */ -struct vio_dev *vio_find_node(struct device_node *vnode) -{ - uint32_t *unit_address; - char kobj_name[BUS_ID_SIZE]; - - /* construct the kobject name from the device node */ - unit_address = (uint32_t *)get_property(vnode, "reg", NULL); - if (!unit_address) - return NULL; - snprintf(kobj_name, BUS_ID_SIZE, "%x", *unit_address); - - return vio_find_name(kobj_name); -} -EXPORT_SYMBOL(vio_find_node); - -/** - * vio_build_iommu_table: - gets the dma information from OF and builds the TCE tree. - * @dev: the virtual device. - * - * Returns a pointer to the built tce tree, or NULL if it can't - * find property. -*/ -static struct iommu_table * vio_build_iommu_table(struct vio_dev *dev) -{ - unsigned int *dma_window; - struct iommu_table *newTceTable; - unsigned long offset; - int dma_window_property_size; - - dma_window = (unsigned int *) get_property(dev->dev.platform_data, "ibm,my-dma-window", &dma_window_property_size); - if(!dma_window) { - return NULL; - } - - newTceTable = (struct iommu_table *) kmalloc(sizeof(struct iommu_table), GFP_KERNEL); - - /* There should be some code to extract the phys-encoded offset - using prom_n_addr_cells(). However, according to a comment - on earlier versions, it's always zero, so we don't bother */ - offset = dma_window[1] >> PAGE_SHIFT; - - /* TCE table size - measured in tce entries */ - newTceTable->it_size = dma_window[4] >> PAGE_SHIFT; - /* offset for VIO should always be 0 */ - newTceTable->it_offset = offset; - newTceTable->it_busno = 0; - newTceTable->it_index = (unsigned long)dma_window[0]; - newTceTable->it_type = TCE_VB; - - return iommu_init_table(newTceTable); -} - -int vio_enable_interrupts(struct vio_dev *dev) -{ - int rc = h_vio_signal(dev->unit_address, VIO_IRQ_ENABLE); - if (rc != H_Success) { - printk(KERN_ERR "vio: Error 0x%x enabling interrupts\n", rc); - } - return rc; -} -EXPORT_SYMBOL(vio_enable_interrupts); - -int vio_disable_interrupts(struct vio_dev *dev) -{ - int rc = h_vio_signal(dev->unit_address, VIO_IRQ_DISABLE); - if (rc != H_Success) { - printk(KERN_ERR "vio: Error 0x%x disabling interrupts\n", rc); - } - return rc; -} -EXPORT_SYMBOL(vio_disable_interrupts); -#endif - -static dma_addr_t vio_map_single(struct device *dev, void *vaddr, - size_t size, enum dma_data_direction direction) -{ - return iommu_map_single(to_vio_dev(dev)->iommu_table, vaddr, size, - direction); -} - -static void vio_unmap_single(struct device *dev, dma_addr_t dma_handle, - size_t size, enum dma_data_direction direction) -{ - iommu_unmap_single(to_vio_dev(dev)->iommu_table, dma_handle, size, - direction); -} - -static int vio_map_sg(struct device *dev, struct scatterlist *sglist, - int nelems, enum dma_data_direction direction) -{ - return iommu_map_sg(dev, to_vio_dev(dev)->iommu_table, sglist, - nelems, direction); -} - -static void vio_unmap_sg(struct device *dev, struct scatterlist *sglist, - int nelems, enum dma_data_direction direction) -{ - iommu_unmap_sg(to_vio_dev(dev)->iommu_table, sglist, nelems, direction); -} - -static void *vio_alloc_coherent(struct device *dev, size_t size, - dma_addr_t *dma_handle, unsigned int __nocast flag) -{ - return iommu_alloc_coherent(to_vio_dev(dev)->iommu_table, size, - dma_handle, flag); -} - -static void vio_free_coherent(struct device *dev, size_t size, - void *vaddr, dma_addr_t dma_handle) -{ - iommu_free_coherent(to_vio_dev(dev)->iommu_table, size, vaddr, - dma_handle); -} - -static int vio_dma_supported(struct device *dev, u64 mask) -{ - return 1; -} - -struct dma_mapping_ops vio_dma_ops = { - .alloc_coherent = vio_alloc_coherent, - .free_coherent = vio_free_coherent, - .map_single = vio_map_single, - .unmap_single = vio_unmap_single, - .map_sg = vio_map_sg, - .unmap_sg = vio_unmap_sg, - .dma_supported = vio_dma_supported, -}; - -static int vio_bus_match(struct device *dev, struct device_driver *drv) -{ - const struct vio_dev *vio_dev = to_vio_dev(dev); - struct vio_driver *vio_drv = to_vio_driver(drv); - const struct vio_device_id *ids = vio_drv->id_table; - const struct vio_device_id *found_id; - - DBGENTER(); - - if (!ids) - return 0; - - found_id = vio_match_device(ids, vio_dev); - if (found_id) - return 1; - - return 0; -} - -struct bus_type vio_bus_type = { - .name = "vio", - .match = vio_bus_match, -}; |