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-rw-r--r--arch/powerpc/platforms/ps3/device-init.c975
1 files changed, 975 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/ps3/device-init.c b/arch/powerpc/platforms/ps3/device-init.c
new file mode 100644
index 000000000..e87360a0f
--- /dev/null
+++ b/arch/powerpc/platforms/ps3/device-init.c
@@ -0,0 +1,975 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * PS3 device registration routines.
+ *
+ * Copyright (C) 2007 Sony Computer Entertainment Inc.
+ * Copyright 2007 Sony Corp.
+ */
+
+#include <linux/delay.h>
+#include <linux/freezer.h>
+#include <linux/kernel.h>
+#include <linux/kthread.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/reboot.h>
+#include <linux/rcuwait.h>
+
+#include <asm/firmware.h>
+#include <asm/lv1call.h>
+#include <asm/ps3stor.h>
+
+#include "platform.h"
+
+static int __init ps3_register_lpm_devices(void)
+{
+ int result;
+ u64 tmp1;
+ u64 tmp2;
+ struct ps3_system_bus_device *dev;
+
+ pr_debug(" -> %s:%d\n", __func__, __LINE__);
+
+ dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+ if (!dev)
+ return -ENOMEM;
+
+ dev->match_id = PS3_MATCH_ID_LPM;
+ dev->dev_type = PS3_DEVICE_TYPE_LPM;
+
+ /* The current lpm driver only supports a single BE processor. */
+
+ result = ps3_repository_read_be_node_id(0, &dev->lpm.node_id);
+
+ if (result) {
+ pr_debug("%s:%d: ps3_repository_read_be_node_id failed \n",
+ __func__, __LINE__);
+ goto fail_read_repo;
+ }
+
+ result = ps3_repository_read_lpm_privileges(dev->lpm.node_id, &tmp1,
+ &dev->lpm.rights);
+
+ if (result) {
+ pr_debug("%s:%d: ps3_repository_read_lpm_privileges failed\n",
+ __func__, __LINE__);
+ goto fail_read_repo;
+ }
+
+ lv1_get_logical_partition_id(&tmp2);
+
+ if (tmp1 != tmp2) {
+ pr_debug("%s:%d: wrong lpar\n",
+ __func__, __LINE__);
+ result = -ENODEV;
+ goto fail_rights;
+ }
+
+ if (!(dev->lpm.rights & PS3_LPM_RIGHTS_USE_LPM)) {
+ pr_debug("%s:%d: don't have rights to use lpm\n",
+ __func__, __LINE__);
+ result = -EPERM;
+ goto fail_rights;
+ }
+
+ pr_debug("%s:%d: pu_id %llu, rights %llu(%llxh)\n",
+ __func__, __LINE__, dev->lpm.pu_id, dev->lpm.rights,
+ dev->lpm.rights);
+
+ result = ps3_repository_read_pu_id(0, &dev->lpm.pu_id);
+
+ if (result) {
+ pr_debug("%s:%d: ps3_repository_read_pu_id failed \n",
+ __func__, __LINE__);
+ goto fail_read_repo;
+ }
+
+ result = ps3_system_bus_device_register(dev);
+
+ if (result) {
+ pr_debug("%s:%d ps3_system_bus_device_register failed\n",
+ __func__, __LINE__);
+ goto fail_register;
+ }
+
+ pr_debug(" <- %s:%d\n", __func__, __LINE__);
+ return 0;
+
+
+fail_register:
+fail_rights:
+fail_read_repo:
+ kfree(dev);
+ pr_debug(" <- %s:%d: failed\n", __func__, __LINE__);
+ return result;
+}
+
+/**
+ * ps3_setup_gelic_device - Setup and register a gelic device instance.
+ *
+ * Allocates memory for a struct ps3_system_bus_device instance, initialises the
+ * structure members, and registers the device instance with the system bus.
+ */
+
+static int __init ps3_setup_gelic_device(
+ const struct ps3_repository_device *repo)
+{
+ int result;
+ struct layout {
+ struct ps3_system_bus_device dev;
+ struct ps3_dma_region d_region;
+ } *p;
+
+ pr_debug(" -> %s:%d\n", __func__, __LINE__);
+
+ BUG_ON(repo->bus_type != PS3_BUS_TYPE_SB);
+ BUG_ON(repo->dev_type != PS3_DEV_TYPE_SB_GELIC);
+
+ p = kzalloc(sizeof(struct layout), GFP_KERNEL);
+
+ if (!p) {
+ result = -ENOMEM;
+ goto fail_malloc;
+ }
+
+ p->dev.match_id = PS3_MATCH_ID_GELIC;
+ p->dev.dev_type = PS3_DEVICE_TYPE_SB;
+ p->dev.bus_id = repo->bus_id;
+ p->dev.dev_id = repo->dev_id;
+ p->dev.d_region = &p->d_region;
+
+ result = ps3_repository_find_interrupt(repo,
+ PS3_INTERRUPT_TYPE_EVENT_PORT, &p->dev.interrupt_id);
+
+ if (result) {
+ pr_debug("%s:%d ps3_repository_find_interrupt failed\n",
+ __func__, __LINE__);
+ goto fail_find_interrupt;
+ }
+
+ BUG_ON(p->dev.interrupt_id != 0);
+
+ result = ps3_dma_region_init(&p->dev, p->dev.d_region, PS3_DMA_64K,
+ PS3_DMA_OTHER, NULL, 0);
+
+ if (result) {
+ pr_debug("%s:%d ps3_dma_region_init failed\n",
+ __func__, __LINE__);
+ goto fail_dma_init;
+ }
+
+ result = ps3_system_bus_device_register(&p->dev);
+
+ if (result) {
+ pr_debug("%s:%d ps3_system_bus_device_register failed\n",
+ __func__, __LINE__);
+ goto fail_device_register;
+ }
+
+ pr_debug(" <- %s:%d\n", __func__, __LINE__);
+ return result;
+
+fail_device_register:
+fail_dma_init:
+fail_find_interrupt:
+ kfree(p);
+fail_malloc:
+ pr_debug(" <- %s:%d: fail.\n", __func__, __LINE__);
+ return result;
+}
+
+static int __ref ps3_setup_uhc_device(
+ const struct ps3_repository_device *repo, enum ps3_match_id match_id,
+ enum ps3_interrupt_type interrupt_type, enum ps3_reg_type reg_type)
+{
+ int result;
+ struct layout {
+ struct ps3_system_bus_device dev;
+ struct ps3_dma_region d_region;
+ struct ps3_mmio_region m_region;
+ } *p;
+ u64 bus_addr;
+ u64 len;
+
+ pr_debug(" -> %s:%d\n", __func__, __LINE__);
+
+ BUG_ON(repo->bus_type != PS3_BUS_TYPE_SB);
+ BUG_ON(repo->dev_type != PS3_DEV_TYPE_SB_USB);
+
+ p = kzalloc(sizeof(struct layout), GFP_KERNEL);
+
+ if (!p) {
+ result = -ENOMEM;
+ goto fail_malloc;
+ }
+
+ p->dev.match_id = match_id;
+ p->dev.dev_type = PS3_DEVICE_TYPE_SB;
+ p->dev.bus_id = repo->bus_id;
+ p->dev.dev_id = repo->dev_id;
+ p->dev.d_region = &p->d_region;
+ p->dev.m_region = &p->m_region;
+
+ result = ps3_repository_find_interrupt(repo,
+ interrupt_type, &p->dev.interrupt_id);
+
+ if (result) {
+ pr_debug("%s:%d ps3_repository_find_interrupt failed\n",
+ __func__, __LINE__);
+ goto fail_find_interrupt;
+ }
+
+ result = ps3_repository_find_reg(repo, reg_type,
+ &bus_addr, &len);
+
+ if (result) {
+ pr_debug("%s:%d ps3_repository_find_reg failed\n",
+ __func__, __LINE__);
+ goto fail_find_reg;
+ }
+
+ result = ps3_dma_region_init(&p->dev, p->dev.d_region, PS3_DMA_64K,
+ PS3_DMA_INTERNAL, NULL, 0);
+
+ if (result) {
+ pr_debug("%s:%d ps3_dma_region_init failed\n",
+ __func__, __LINE__);
+ goto fail_dma_init;
+ }
+
+ result = ps3_mmio_region_init(&p->dev, p->dev.m_region, bus_addr, len,
+ PS3_MMIO_4K);
+
+ if (result) {
+ pr_debug("%s:%d ps3_mmio_region_init failed\n",
+ __func__, __LINE__);
+ goto fail_mmio_init;
+ }
+
+ result = ps3_system_bus_device_register(&p->dev);
+
+ if (result) {
+ pr_debug("%s:%d ps3_system_bus_device_register failed\n",
+ __func__, __LINE__);
+ goto fail_device_register;
+ }
+
+ pr_debug(" <- %s:%d\n", __func__, __LINE__);
+ return result;
+
+fail_device_register:
+fail_mmio_init:
+fail_dma_init:
+fail_find_reg:
+fail_find_interrupt:
+ kfree(p);
+fail_malloc:
+ pr_debug(" <- %s:%d: fail.\n", __func__, __LINE__);
+ return result;
+}
+
+static int __init ps3_setup_ehci_device(
+ const struct ps3_repository_device *repo)
+{
+ return ps3_setup_uhc_device(repo, PS3_MATCH_ID_EHCI,
+ PS3_INTERRUPT_TYPE_SB_EHCI, PS3_REG_TYPE_SB_EHCI);
+}
+
+static int __init ps3_setup_ohci_device(
+ const struct ps3_repository_device *repo)
+{
+ return ps3_setup_uhc_device(repo, PS3_MATCH_ID_OHCI,
+ PS3_INTERRUPT_TYPE_SB_OHCI, PS3_REG_TYPE_SB_OHCI);
+}
+
+static int __init ps3_setup_vuart_device(enum ps3_match_id match_id,
+ unsigned int port_number)
+{
+ int result;
+ struct layout {
+ struct ps3_system_bus_device dev;
+ } *p;
+
+ pr_debug(" -> %s:%d: match_id %u, port %u\n", __func__, __LINE__,
+ match_id, port_number);
+
+ p = kzalloc(sizeof(struct layout), GFP_KERNEL);
+
+ if (!p)
+ return -ENOMEM;
+
+ p->dev.match_id = match_id;
+ p->dev.dev_type = PS3_DEVICE_TYPE_VUART;
+ p->dev.port_number = port_number;
+
+ result = ps3_system_bus_device_register(&p->dev);
+
+ if (result) {
+ pr_debug("%s:%d ps3_system_bus_device_register failed\n",
+ __func__, __LINE__);
+ goto fail_device_register;
+ }
+ pr_debug(" <- %s:%d\n", __func__, __LINE__);
+ return 0;
+
+fail_device_register:
+ kfree(p);
+ pr_debug(" <- %s:%d fail\n", __func__, __LINE__);
+ return result;
+}
+
+static int ps3_setup_storage_dev(const struct ps3_repository_device *repo,
+ enum ps3_match_id match_id)
+{
+ int result;
+ struct ps3_storage_device *p;
+ u64 port, blk_size, num_blocks;
+ unsigned int num_regions, i;
+
+ pr_debug(" -> %s:%u: match_id %u\n", __func__, __LINE__, match_id);
+
+ result = ps3_repository_read_stor_dev_info(repo->bus_index,
+ repo->dev_index, &port,
+ &blk_size, &num_blocks,
+ &num_regions);
+ if (result) {
+ printk(KERN_ERR "%s:%u: _read_stor_dev_info failed %d\n",
+ __func__, __LINE__, result);
+ return -ENODEV;
+ }
+
+ pr_debug("%s:%u: (%u:%u:%u): port %llu blk_size %llu num_blocks %llu "
+ "num_regions %u\n", __func__, __LINE__, repo->bus_index,
+ repo->dev_index, repo->dev_type, port, blk_size, num_blocks,
+ num_regions);
+
+ p = kzalloc(struct_size(p, regions, num_regions), GFP_KERNEL);
+ if (!p) {
+ result = -ENOMEM;
+ goto fail_malloc;
+ }
+
+ p->sbd.match_id = match_id;
+ p->sbd.dev_type = PS3_DEVICE_TYPE_SB;
+ p->sbd.bus_id = repo->bus_id;
+ p->sbd.dev_id = repo->dev_id;
+ p->sbd.d_region = &p->dma_region;
+ p->blk_size = blk_size;
+ p->num_regions = num_regions;
+
+ result = ps3_repository_find_interrupt(repo,
+ PS3_INTERRUPT_TYPE_EVENT_PORT,
+ &p->sbd.interrupt_id);
+ if (result) {
+ printk(KERN_ERR "%s:%u: find_interrupt failed %d\n", __func__,
+ __LINE__, result);
+ result = -ENODEV;
+ goto fail_find_interrupt;
+ }
+
+ for (i = 0; i < num_regions; i++) {
+ unsigned int id;
+ u64 start, size;
+
+ result = ps3_repository_read_stor_dev_region(repo->bus_index,
+ repo->dev_index,
+ i, &id, &start,
+ &size);
+ if (result) {
+ printk(KERN_ERR
+ "%s:%u: read_stor_dev_region failed %d\n",
+ __func__, __LINE__, result);
+ result = -ENODEV;
+ goto fail_read_region;
+ }
+ pr_debug("%s:%u: region %u: id %u start %llu size %llu\n",
+ __func__, __LINE__, i, id, start, size);
+
+ p->regions[i].id = id;
+ p->regions[i].start = start;
+ p->regions[i].size = size;
+ }
+
+ result = ps3_system_bus_device_register(&p->sbd);
+ if (result) {
+ pr_debug("%s:%u ps3_system_bus_device_register failed\n",
+ __func__, __LINE__);
+ goto fail_device_register;
+ }
+
+ pr_debug(" <- %s:%u\n", __func__, __LINE__);
+ return 0;
+
+fail_device_register:
+fail_read_region:
+fail_find_interrupt:
+ kfree(p);
+fail_malloc:
+ pr_debug(" <- %s:%u: fail.\n", __func__, __LINE__);
+ return result;
+}
+
+static int __init ps3_register_vuart_devices(void)
+{
+ int result;
+ unsigned int port_number;
+
+ pr_debug(" -> %s:%d\n", __func__, __LINE__);
+
+ result = ps3_repository_read_vuart_av_port(&port_number);
+ if (result)
+ port_number = 0; /* av default */
+
+ result = ps3_setup_vuart_device(PS3_MATCH_ID_AV_SETTINGS, port_number);
+ WARN_ON(result);
+
+ result = ps3_repository_read_vuart_sysmgr_port(&port_number);
+ if (result)
+ port_number = 2; /* sysmgr default */
+
+ result = ps3_setup_vuart_device(PS3_MATCH_ID_SYSTEM_MANAGER,
+ port_number);
+ WARN_ON(result);
+
+ pr_debug(" <- %s:%d\n", __func__, __LINE__);
+ return result;
+}
+
+static int __init ps3_register_sound_devices(void)
+{
+ int result;
+ struct layout {
+ struct ps3_system_bus_device dev;
+ struct ps3_dma_region d_region;
+ struct ps3_mmio_region m_region;
+ } *p;
+
+ pr_debug(" -> %s:%d\n", __func__, __LINE__);
+
+ p = kzalloc(sizeof(*p), GFP_KERNEL);
+ if (!p)
+ return -ENOMEM;
+
+ p->dev.match_id = PS3_MATCH_ID_SOUND;
+ p->dev.dev_type = PS3_DEVICE_TYPE_IOC0;
+ p->dev.d_region = &p->d_region;
+ p->dev.m_region = &p->m_region;
+
+ result = ps3_system_bus_device_register(&p->dev);
+
+ if (result) {
+ pr_debug("%s:%d ps3_system_bus_device_register failed\n",
+ __func__, __LINE__);
+ goto fail_device_register;
+ }
+ pr_debug(" <- %s:%d\n", __func__, __LINE__);
+ return 0;
+
+fail_device_register:
+ kfree(p);
+ pr_debug(" <- %s:%d failed\n", __func__, __LINE__);
+ return result;
+}
+
+static int __init ps3_register_graphics_devices(void)
+{
+ int result;
+ struct layout {
+ struct ps3_system_bus_device dev;
+ } *p;
+
+ pr_debug(" -> %s:%d\n", __func__, __LINE__);
+
+ p = kzalloc(sizeof(struct layout), GFP_KERNEL);
+
+ if (!p)
+ return -ENOMEM;
+
+ p->dev.match_id = PS3_MATCH_ID_GPU;
+ p->dev.match_sub_id = PS3_MATCH_SUB_ID_GPU_FB;
+ p->dev.dev_type = PS3_DEVICE_TYPE_IOC0;
+
+ result = ps3_system_bus_device_register(&p->dev);
+
+ if (result) {
+ pr_debug("%s:%d ps3_system_bus_device_register failed\n",
+ __func__, __LINE__);
+ goto fail_device_register;
+ }
+
+ pr_debug(" <- %s:%d\n", __func__, __LINE__);
+ return 0;
+
+fail_device_register:
+ kfree(p);
+ pr_debug(" <- %s:%d failed\n", __func__, __LINE__);
+ return result;
+}
+
+static int __init ps3_register_ramdisk_device(void)
+{
+ int result;
+ struct layout {
+ struct ps3_system_bus_device dev;
+ } *p;
+
+ pr_debug(" -> %s:%d\n", __func__, __LINE__);
+
+ p = kzalloc(sizeof(struct layout), GFP_KERNEL);
+
+ if (!p)
+ return -ENOMEM;
+
+ p->dev.match_id = PS3_MATCH_ID_GPU;
+ p->dev.match_sub_id = PS3_MATCH_SUB_ID_GPU_RAMDISK;
+ p->dev.dev_type = PS3_DEVICE_TYPE_IOC0;
+
+ result = ps3_system_bus_device_register(&p->dev);
+
+ if (result) {
+ pr_debug("%s:%d ps3_system_bus_device_register failed\n",
+ __func__, __LINE__);
+ goto fail_device_register;
+ }
+
+ pr_debug(" <- %s:%d\n", __func__, __LINE__);
+ return 0;
+
+fail_device_register:
+ kfree(p);
+ pr_debug(" <- %s:%d failed\n", __func__, __LINE__);
+ return result;
+}
+
+/**
+ * ps3_setup_dynamic_device - Setup a dynamic device from the repository
+ */
+
+static int ps3_setup_dynamic_device(const struct ps3_repository_device *repo)
+{
+ int result;
+
+ switch (repo->dev_type) {
+ case PS3_DEV_TYPE_STOR_DISK:
+ result = ps3_setup_storage_dev(repo, PS3_MATCH_ID_STOR_DISK);
+
+ /* Some devices are not accessible from the Other OS lpar. */
+ if (result == -ENODEV) {
+ result = 0;
+ pr_debug("%s:%u: not accessible\n", __func__,
+ __LINE__);
+ }
+
+ if (result)
+ pr_debug("%s:%u ps3_setup_storage_dev failed\n",
+ __func__, __LINE__);
+ break;
+
+ case PS3_DEV_TYPE_STOR_ROM:
+ result = ps3_setup_storage_dev(repo, PS3_MATCH_ID_STOR_ROM);
+ if (result)
+ pr_debug("%s:%u ps3_setup_storage_dev failed\n",
+ __func__, __LINE__);
+ break;
+
+ case PS3_DEV_TYPE_STOR_FLASH:
+ result = ps3_setup_storage_dev(repo, PS3_MATCH_ID_STOR_FLASH);
+ if (result)
+ pr_debug("%s:%u ps3_setup_storage_dev failed\n",
+ __func__, __LINE__);
+ break;
+
+ default:
+ result = 0;
+ pr_debug("%s:%u: unsupported dev_type %u\n", __func__, __LINE__,
+ repo->dev_type);
+ }
+
+ return result;
+}
+
+/**
+ * ps3_setup_static_device - Setup a static device from the repository
+ */
+
+static int __init ps3_setup_static_device(const struct ps3_repository_device *repo)
+{
+ int result;
+
+ switch (repo->dev_type) {
+ case PS3_DEV_TYPE_SB_GELIC:
+ result = ps3_setup_gelic_device(repo);
+ if (result) {
+ pr_debug("%s:%d ps3_setup_gelic_device failed\n",
+ __func__, __LINE__);
+ }
+ break;
+ case PS3_DEV_TYPE_SB_USB:
+
+ /* Each USB device has both an EHCI and an OHCI HC */
+
+ result = ps3_setup_ehci_device(repo);
+
+ if (result) {
+ pr_debug("%s:%d ps3_setup_ehci_device failed\n",
+ __func__, __LINE__);
+ }
+
+ result = ps3_setup_ohci_device(repo);
+
+ if (result) {
+ pr_debug("%s:%d ps3_setup_ohci_device failed\n",
+ __func__, __LINE__);
+ }
+ break;
+
+ default:
+ return ps3_setup_dynamic_device(repo);
+ }
+
+ return result;
+}
+
+static void ps3_find_and_add_device(u64 bus_id, u64 dev_id)
+{
+ struct ps3_repository_device repo;
+ int res;
+ unsigned int retries;
+ unsigned long rem;
+
+ /*
+ * On some firmware versions (e.g. 1.90), the device may not show up
+ * in the repository immediately
+ */
+ for (retries = 0; retries < 10; retries++) {
+ res = ps3_repository_find_device_by_id(&repo, bus_id, dev_id);
+ if (!res)
+ goto found;
+
+ rem = msleep_interruptible(100);
+ if (rem)
+ break;
+ }
+ pr_warn("%s:%u: device %llu:%llu not found\n",
+ __func__, __LINE__, bus_id, dev_id);
+ return;
+
+found:
+ if (retries)
+ pr_debug("%s:%u: device %llu:%llu found after %u retries\n",
+ __func__, __LINE__, bus_id, dev_id, retries);
+
+ ps3_setup_dynamic_device(&repo);
+ return;
+}
+
+#define PS3_NOTIFICATION_DEV_ID ULONG_MAX
+#define PS3_NOTIFICATION_INTERRUPT_ID 0
+
+struct ps3_notification_device {
+ struct ps3_system_bus_device sbd;
+ spinlock_t lock;
+ u64 tag;
+ u64 lv1_status;
+ struct rcuwait wait;
+ bool done;
+};
+
+enum ps3_notify_type {
+ notify_device_ready = 0,
+ notify_region_probe = 1,
+ notify_region_update = 2,
+};
+
+struct ps3_notify_cmd {
+ u64 operation_code; /* must be zero */
+ u64 event_mask; /* OR of 1UL << enum ps3_notify_type */
+};
+
+struct ps3_notify_event {
+ u64 event_type; /* enum ps3_notify_type */
+ u64 bus_id;
+ u64 dev_id;
+ u64 dev_type;
+ u64 dev_port;
+};
+
+static irqreturn_t ps3_notification_interrupt(int irq, void *data)
+{
+ struct ps3_notification_device *dev = data;
+ int res;
+ u64 tag, status;
+
+ spin_lock(&dev->lock);
+ res = lv1_storage_get_async_status(PS3_NOTIFICATION_DEV_ID, &tag,
+ &status);
+ if (tag != dev->tag)
+ pr_err("%s:%u: tag mismatch, got %llx, expected %llx\n",
+ __func__, __LINE__, tag, dev->tag);
+
+ if (res) {
+ pr_err("%s:%u: res %d status 0x%llx\n", __func__, __LINE__, res,
+ status);
+ } else {
+ pr_debug("%s:%u: completed, status 0x%llx\n", __func__,
+ __LINE__, status);
+ dev->lv1_status = status;
+ dev->done = true;
+ rcuwait_wake_up(&dev->wait);
+ }
+ spin_unlock(&dev->lock);
+ return IRQ_HANDLED;
+}
+
+static int ps3_notification_read_write(struct ps3_notification_device *dev,
+ u64 lpar, int write)
+{
+ const char *op = write ? "write" : "read";
+ unsigned long flags;
+ int res;
+
+ spin_lock_irqsave(&dev->lock, flags);
+ res = write ? lv1_storage_write(dev->sbd.dev_id, 0, 0, 1, 0, lpar,
+ &dev->tag)
+ : lv1_storage_read(dev->sbd.dev_id, 0, 0, 1, 0, lpar,
+ &dev->tag);
+ dev->done = false;
+ spin_unlock_irqrestore(&dev->lock, flags);
+ if (res) {
+ pr_err("%s:%u: %s failed %d\n", __func__, __LINE__, op, res);
+ return -EPERM;
+ }
+ pr_debug("%s:%u: notification %s issued\n", __func__, __LINE__, op);
+
+ rcuwait_wait_event(&dev->wait, dev->done || kthread_should_stop(), TASK_IDLE);
+
+ if (kthread_should_stop())
+ res = -EINTR;
+
+ if (dev->lv1_status) {
+ pr_err("%s:%u: %s not completed, status 0x%llx\n", __func__,
+ __LINE__, op, dev->lv1_status);
+ return -EIO;
+ }
+ pr_debug("%s:%u: notification %s completed\n", __func__, __LINE__, op);
+
+ return 0;
+}
+
+static struct task_struct *probe_task;
+
+/**
+ * ps3_probe_thread - Background repository probing at system startup.
+ *
+ * This implementation only supports background probing on a single bus.
+ * It uses the hypervisor's storage device notification mechanism to wait until
+ * a storage device is ready. The device notification mechanism uses a
+ * pseudo device to asynchronously notify the guest when storage devices become
+ * ready. The notification device has a block size of 512 bytes.
+ */
+
+static int ps3_probe_thread(void *data)
+{
+ struct ps3_notification_device dev;
+ int res;
+ unsigned int irq;
+ u64 lpar;
+ void *buf;
+ struct ps3_notify_cmd *notify_cmd;
+ struct ps3_notify_event *notify_event;
+
+ pr_debug(" -> %s:%u: kthread started\n", __func__, __LINE__);
+
+ buf = kzalloc(512, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ lpar = ps3_mm_phys_to_lpar(__pa(buf));
+ notify_cmd = buf;
+ notify_event = buf;
+
+ /* dummy system bus device */
+ dev.sbd.bus_id = (u64)data;
+ dev.sbd.dev_id = PS3_NOTIFICATION_DEV_ID;
+ dev.sbd.interrupt_id = PS3_NOTIFICATION_INTERRUPT_ID;
+
+ res = lv1_open_device(dev.sbd.bus_id, dev.sbd.dev_id, 0);
+ if (res) {
+ pr_err("%s:%u: lv1_open_device failed %s\n", __func__,
+ __LINE__, ps3_result(res));
+ goto fail_free;
+ }
+
+ res = ps3_sb_event_receive_port_setup(&dev.sbd, PS3_BINDING_CPU_ANY,
+ &irq);
+ if (res) {
+ pr_err("%s:%u: ps3_sb_event_receive_port_setup failed %d\n",
+ __func__, __LINE__, res);
+ goto fail_close_device;
+ }
+
+ spin_lock_init(&dev.lock);
+ rcuwait_init(&dev.wait);
+
+ res = request_irq(irq, ps3_notification_interrupt, 0,
+ "ps3_notification", &dev);
+ if (res) {
+ pr_err("%s:%u: request_irq failed %d\n", __func__, __LINE__,
+ res);
+ goto fail_sb_event_receive_port_destroy;
+ }
+
+ /* Setup and write the request for device notification. */
+ notify_cmd->operation_code = 0; /* must be zero */
+ notify_cmd->event_mask = 1UL << notify_region_probe;
+
+ res = ps3_notification_read_write(&dev, lpar, 1);
+ if (res)
+ goto fail_free_irq;
+
+ /* Loop here processing the requested notification events. */
+ do {
+ try_to_freeze();
+
+ memset(notify_event, 0, sizeof(*notify_event));
+
+ res = ps3_notification_read_write(&dev, lpar, 0);
+ if (res)
+ break;
+
+ pr_debug("%s:%u: notify event type 0x%llx bus id %llu dev id %llu"
+ " type %llu port %llu\n", __func__, __LINE__,
+ notify_event->event_type, notify_event->bus_id,
+ notify_event->dev_id, notify_event->dev_type,
+ notify_event->dev_port);
+
+ if (notify_event->event_type != notify_region_probe ||
+ notify_event->bus_id != dev.sbd.bus_id) {
+ pr_warn("%s:%u: bad notify_event: event %llu, dev_id %llu, dev_type %llu\n",
+ __func__, __LINE__, notify_event->event_type,
+ notify_event->dev_id, notify_event->dev_type);
+ continue;
+ }
+
+ ps3_find_and_add_device(dev.sbd.bus_id, notify_event->dev_id);
+
+ } while (!kthread_should_stop());
+
+fail_free_irq:
+ free_irq(irq, &dev);
+fail_sb_event_receive_port_destroy:
+ ps3_sb_event_receive_port_destroy(&dev.sbd, irq);
+fail_close_device:
+ lv1_close_device(dev.sbd.bus_id, dev.sbd.dev_id);
+fail_free:
+ kfree(buf);
+
+ probe_task = NULL;
+
+ pr_debug(" <- %s:%u: kthread finished\n", __func__, __LINE__);
+
+ return 0;
+}
+
+/**
+ * ps3_stop_probe_thread - Stops the background probe thread.
+ *
+ */
+
+static int ps3_stop_probe_thread(struct notifier_block *nb, unsigned long code,
+ void *data)
+{
+ if (probe_task)
+ kthread_stop(probe_task);
+ return 0;
+}
+
+static struct notifier_block nb = {
+ .notifier_call = ps3_stop_probe_thread
+};
+
+/**
+ * ps3_start_probe_thread - Starts the background probe thread.
+ *
+ */
+
+static int __init ps3_start_probe_thread(enum ps3_bus_type bus_type)
+{
+ int result;
+ struct task_struct *task;
+ struct ps3_repository_device repo;
+
+ pr_debug(" -> %s:%d\n", __func__, __LINE__);
+
+ memset(&repo, 0, sizeof(repo));
+
+ repo.bus_type = bus_type;
+
+ result = ps3_repository_find_bus(repo.bus_type, 0, &repo.bus_index);
+
+ if (result) {
+ printk(KERN_ERR "%s: Cannot find bus (%d)\n", __func__, result);
+ return -ENODEV;
+ }
+
+ result = ps3_repository_read_bus_id(repo.bus_index, &repo.bus_id);
+
+ if (result) {
+ printk(KERN_ERR "%s: read_bus_id failed %d\n", __func__,
+ result);
+ return -ENODEV;
+ }
+
+ task = kthread_run(ps3_probe_thread, (void *)repo.bus_id,
+ "ps3-probe-%u", bus_type);
+
+ if (IS_ERR(task)) {
+ result = PTR_ERR(task);
+ printk(KERN_ERR "%s: kthread_run failed %d\n", __func__,
+ result);
+ return result;
+ }
+
+ probe_task = task;
+ register_reboot_notifier(&nb);
+
+ pr_debug(" <- %s:%d\n", __func__, __LINE__);
+ return 0;
+}
+
+/**
+ * ps3_register_devices - Probe the system and register devices found.
+ *
+ * A device_initcall() routine.
+ */
+
+static int __init ps3_register_devices(void)
+{
+ int result;
+
+ if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
+ return -ENODEV;
+
+ pr_debug(" -> %s:%d\n", __func__, __LINE__);
+
+ /* ps3_repository_dump_bus_info(); */
+
+ result = ps3_start_probe_thread(PS3_BUS_TYPE_STORAGE);
+
+ ps3_register_vuart_devices();
+
+ ps3_register_graphics_devices();
+
+ ps3_repository_find_devices(PS3_BUS_TYPE_SB, ps3_setup_static_device);
+
+ ps3_register_sound_devices();
+
+ ps3_register_lpm_devices();
+
+ ps3_register_ramdisk_device();
+
+ pr_debug(" <- %s:%d\n", __func__, __LINE__);
+ return 0;
+}
+
+device_initcall(ps3_register_devices);