char *desc;
};
-static const struct irq_class intrclass_names[] = {
+/*
+ * The list of "main" irq classes on s390. This is the list of interrrupts
+ * that appear both in /proc/stat ("intr" line) and /proc/interrupts.
+ * Historically only external and I/O interrupts have been part of /proc/stat.
+ * We can't add the split external and I/O sub classes since the first field
+ * in the "intr" line in /proc/stat is supposed to be the sum of all other
+ * fields.
+ * Since the external and I/O interrupt fields are already sums we would end
+ * up with having a sum which accounts each interrupt twice.
+ */
+static const struct irq_class irqclass_main_desc[NR_IRQS] = {
[EXTERNAL_INTERRUPT] = {.name = "EXT"},
- [IO_INTERRUPT] = {.name = "I/O"},
- [EXTINT_CLK] = {.name = "CLK", .desc = "[EXT] Clock Comparator"},
- [EXTINT_EXC] = {.name = "EXC", .desc = "[EXT] External Call"},
- [EXTINT_EMS] = {.name = "EMS", .desc = "[EXT] Emergency Signal"},
- [EXTINT_TMR] = {.name = "TMR", .desc = "[EXT] CPU Timer"},
- [EXTINT_TLA] = {.name = "TAL", .desc = "[EXT] Timing Alert"},
- [EXTINT_PFL] = {.name = "PFL", .desc = "[EXT] Pseudo Page Fault"},
- [EXTINT_DSD] = {.name = "DSD", .desc = "[EXT] DASD Diag"},
- [EXTINT_VRT] = {.name = "VRT", .desc = "[EXT] Virtio"},
- [EXTINT_SCP] = {.name = "SCP", .desc = "[EXT] Service Call"},
- [EXTINT_IUC] = {.name = "IUC", .desc = "[EXT] IUCV"},
- [EXTINT_CMS] = {.name = "CMS", .desc = "[EXT] CPU-Measurement: Sampling"},
- [EXTINT_CMC] = {.name = "CMC", .desc = "[EXT] CPU-Measurement: Counter"},
- [EXTINT_CMR] = {.name = "CMR", .desc = "[EXT] CPU-Measurement: RI"},
- [IOINT_CIO] = {.name = "CIO", .desc = "[I/O] Common I/O Layer Interrupt"},
- [IOINT_QAI] = {.name = "QAI", .desc = "[I/O] QDIO Adapter Interrupt"},
- [IOINT_DAS] = {.name = "DAS", .desc = "[I/O] DASD"},
- [IOINT_C15] = {.name = "C15", .desc = "[I/O] 3215"},
- [IOINT_C70] = {.name = "C70", .desc = "[I/O] 3270"},
- [IOINT_TAP] = {.name = "TAP", .desc = "[I/O] Tape"},
- [IOINT_VMR] = {.name = "VMR", .desc = "[I/O] Unit Record Devices"},
- [IOINT_LCS] = {.name = "LCS", .desc = "[I/O] LCS"},
- [IOINT_CLW] = {.name = "CLW", .desc = "[I/O] CLAW"},
- [IOINT_CTC] = {.name = "CTC", .desc = "[I/O] CTC"},
- [IOINT_APB] = {.name = "APB", .desc = "[I/O] AP Bus"},
- [IOINT_ADM] = {.name = "ADM", .desc = "[I/O] EADM Subchannel"},
- [IOINT_CSC] = {.name = "CSC", .desc = "[I/O] CHSC Subchannel"},
- [IOINT_PCI] = {.name = "PCI", .desc = "[I/O] PCI Interrupt" },
- [IOINT_MSI] = {.name = "MSI", .desc = "[I/O] MSI Interrupt" },
- [IOINT_VIR] = {.name = "VIR", .desc = "[I/O] Virtual I/O Devices"},
+ [IO_INTERRUPT] = {.name = "I/O"}
+};
+
+/*
+ * The list of split external and I/O interrupts that appear only in
+ * /proc/interrupts.
+ * In addition this list contains non external / I/O events like NMIs.
+ */
+static const struct irq_class irqclass_sub_desc[NR_ARCH_IRQS] = {
+ [IRQEXT_CLK] = {.name = "CLK", .desc = "[EXT] Clock Comparator"},
+ [IRQEXT_EXC] = {.name = "EXC", .desc = "[EXT] External Call"},
+ [IRQEXT_EMS] = {.name = "EMS", .desc = "[EXT] Emergency Signal"},
+ [IRQEXT_TMR] = {.name = "TMR", .desc = "[EXT] CPU Timer"},
+ [IRQEXT_TLA] = {.name = "TAL", .desc = "[EXT] Timing Alert"},
+ [IRQEXT_PFL] = {.name = "PFL", .desc = "[EXT] Pseudo Page Fault"},
+ [IRQEXT_DSD] = {.name = "DSD", .desc = "[EXT] DASD Diag"},
+ [IRQEXT_VRT] = {.name = "VRT", .desc = "[EXT] Virtio"},
+ [IRQEXT_SCP] = {.name = "SCP", .desc = "[EXT] Service Call"},
+ [IRQEXT_IUC] = {.name = "IUC", .desc = "[EXT] IUCV"},
+ [IRQEXT_CMS] = {.name = "CMS", .desc = "[EXT] CPU-Measurement: Sampling"},
+ [IRQEXT_CMC] = {.name = "CMC", .desc = "[EXT] CPU-Measurement: Counter"},
+ [IRQEXT_CMR] = {.name = "CMR", .desc = "[EXT] CPU-Measurement: RI"},
+ [IRQIO_CIO] = {.name = "CIO", .desc = "[I/O] Common I/O Layer Interrupt"},
+ [IRQIO_QAI] = {.name = "QAI", .desc = "[I/O] QDIO Adapter Interrupt"},
+ [IRQIO_DAS] = {.name = "DAS", .desc = "[I/O] DASD"},
+ [IRQIO_C15] = {.name = "C15", .desc = "[I/O] 3215"},
+ [IRQIO_C70] = {.name = "C70", .desc = "[I/O] 3270"},
+ [IRQIO_TAP] = {.name = "TAP", .desc = "[I/O] Tape"},
+ [IRQIO_VMR] = {.name = "VMR", .desc = "[I/O] Unit Record Devices"},
+ [IRQIO_LCS] = {.name = "LCS", .desc = "[I/O] LCS"},
+ [IRQIO_CLW] = {.name = "CLW", .desc = "[I/O] CLAW"},
+ [IRQIO_CTC] = {.name = "CTC", .desc = "[I/O] CTC"},
+ [IRQIO_APB] = {.name = "APB", .desc = "[I/O] AP Bus"},
+ [IRQIO_ADM] = {.name = "ADM", .desc = "[I/O] EADM Subchannel"},
+ [IRQIO_CSC] = {.name = "CSC", .desc = "[I/O] CHSC Subchannel"},
+ [IRQIO_PCI] = {.name = "PCI", .desc = "[I/O] PCI Interrupt" },
+ [IRQIO_MSI] = {.name = "MSI", .desc = "[I/O] MSI Interrupt" },
++ [IRQIO_VIR] = {.name = "VIR", .desc = "[I/O] Virtual I/O Devices"},
[NMI_NMI] = {.name = "NMI", .desc = "[NMI] Machine Check"},
+ [CPU_RST] = {.name = "RST", .desc = "[CPU] CPU Restart"},
};
/*
--- /dev/null
- { EXIT_REASON_WBINVD, "WBINVD" }
+/*
+ * vmx.h: VMX Architecture related definitions
+ * Copyright (c) 2004, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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.
+ *
+ * A few random additions are:
+ * Copyright (C) 2006 Qumranet
+ * Avi Kivity <avi@qumranet.com>
+ * Yaniv Kamay <yaniv@qumranet.com>
+ *
+ */
+#ifndef _UAPIVMX_H
+#define _UAPIVMX_H
+
+
+#define VMX_EXIT_REASONS_FAILED_VMENTRY 0x80000000
+
+#define EXIT_REASON_EXCEPTION_NMI 0
+#define EXIT_REASON_EXTERNAL_INTERRUPT 1
+#define EXIT_REASON_TRIPLE_FAULT 2
+
+#define EXIT_REASON_PENDING_INTERRUPT 7
+#define EXIT_REASON_NMI_WINDOW 8
+#define EXIT_REASON_TASK_SWITCH 9
+#define EXIT_REASON_CPUID 10
+#define EXIT_REASON_HLT 12
+#define EXIT_REASON_INVD 13
+#define EXIT_REASON_INVLPG 14
+#define EXIT_REASON_RDPMC 15
+#define EXIT_REASON_RDTSC 16
+#define EXIT_REASON_VMCALL 18
+#define EXIT_REASON_VMCLEAR 19
+#define EXIT_REASON_VMLAUNCH 20
+#define EXIT_REASON_VMPTRLD 21
+#define EXIT_REASON_VMPTRST 22
+#define EXIT_REASON_VMREAD 23
+#define EXIT_REASON_VMRESUME 24
+#define EXIT_REASON_VMWRITE 25
+#define EXIT_REASON_VMOFF 26
+#define EXIT_REASON_VMON 27
+#define EXIT_REASON_CR_ACCESS 28
+#define EXIT_REASON_DR_ACCESS 29
+#define EXIT_REASON_IO_INSTRUCTION 30
+#define EXIT_REASON_MSR_READ 31
+#define EXIT_REASON_MSR_WRITE 32
+#define EXIT_REASON_INVALID_STATE 33
+#define EXIT_REASON_MWAIT_INSTRUCTION 36
+#define EXIT_REASON_MONITOR_INSTRUCTION 39
+#define EXIT_REASON_PAUSE_INSTRUCTION 40
+#define EXIT_REASON_MCE_DURING_VMENTRY 41
+#define EXIT_REASON_TPR_BELOW_THRESHOLD 43
+#define EXIT_REASON_APIC_ACCESS 44
++#define EXIT_REASON_EOI_INDUCED 45
+#define EXIT_REASON_EPT_VIOLATION 48
+#define EXIT_REASON_EPT_MISCONFIG 49
+#define EXIT_REASON_WBINVD 54
+#define EXIT_REASON_XSETBV 55
++#define EXIT_REASON_APIC_WRITE 56
+#define EXIT_REASON_INVPCID 58
+
+#define VMX_EXIT_REASONS \
+ { EXIT_REASON_EXCEPTION_NMI, "EXCEPTION_NMI" }, \
+ { EXIT_REASON_EXTERNAL_INTERRUPT, "EXTERNAL_INTERRUPT" }, \
+ { EXIT_REASON_TRIPLE_FAULT, "TRIPLE_FAULT" }, \
+ { EXIT_REASON_PENDING_INTERRUPT, "PENDING_INTERRUPT" }, \
+ { EXIT_REASON_NMI_WINDOW, "NMI_WINDOW" }, \
+ { EXIT_REASON_TASK_SWITCH, "TASK_SWITCH" }, \
+ { EXIT_REASON_CPUID, "CPUID" }, \
+ { EXIT_REASON_HLT, "HLT" }, \
+ { EXIT_REASON_INVLPG, "INVLPG" }, \
+ { EXIT_REASON_RDPMC, "RDPMC" }, \
+ { EXIT_REASON_RDTSC, "RDTSC" }, \
+ { EXIT_REASON_VMCALL, "VMCALL" }, \
+ { EXIT_REASON_VMCLEAR, "VMCLEAR" }, \
+ { EXIT_REASON_VMLAUNCH, "VMLAUNCH" }, \
+ { EXIT_REASON_VMPTRLD, "VMPTRLD" }, \
+ { EXIT_REASON_VMPTRST, "VMPTRST" }, \
+ { EXIT_REASON_VMREAD, "VMREAD" }, \
+ { EXIT_REASON_VMRESUME, "VMRESUME" }, \
+ { EXIT_REASON_VMWRITE, "VMWRITE" }, \
+ { EXIT_REASON_VMOFF, "VMOFF" }, \
+ { EXIT_REASON_VMON, "VMON" }, \
+ { EXIT_REASON_CR_ACCESS, "CR_ACCESS" }, \
+ { EXIT_REASON_DR_ACCESS, "DR_ACCESS" }, \
+ { EXIT_REASON_IO_INSTRUCTION, "IO_INSTRUCTION" }, \
+ { EXIT_REASON_MSR_READ, "MSR_READ" }, \
+ { EXIT_REASON_MSR_WRITE, "MSR_WRITE" }, \
+ { EXIT_REASON_MWAIT_INSTRUCTION, "MWAIT_INSTRUCTION" }, \
+ { EXIT_REASON_MONITOR_INSTRUCTION, "MONITOR_INSTRUCTION" }, \
+ { EXIT_REASON_PAUSE_INSTRUCTION, "PAUSE_INSTRUCTION" }, \
+ { EXIT_REASON_MCE_DURING_VMENTRY, "MCE_DURING_VMENTRY" }, \
+ { EXIT_REASON_TPR_BELOW_THRESHOLD, "TPR_BELOW_THRESHOLD" }, \
+ { EXIT_REASON_APIC_ACCESS, "APIC_ACCESS" }, \
+ { EXIT_REASON_EPT_VIOLATION, "EPT_VIOLATION" }, \
+ { EXIT_REASON_EPT_MISCONFIG, "EPT_MISCONFIG" }, \
++ { EXIT_REASON_WBINVD, "WBINVD" }, \
++ { EXIT_REASON_APIC_WRITE, "APIC_WRITE" }, \
++ { EXIT_REASON_EOI_INDUCED, "EOI_INDUCED" }, \
++ { EXIT_REASON_INVALID_STATE, "INVALID_STATE" }, \
++ { EXIT_REASON_INVD, "INVD" }, \
++ { EXIT_REASON_INVPCID, "INVPCID" }
+
+
+#endif /* _UAPIVMX_H */
--- /dev/null
- .int_class = IOINT_VIR,
+ /*
+ * ccw based virtio transport
+ *
+ * Copyright IBM Corp. 2012
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License (version 2 only)
+ * as published by the Free Software Foundation.
+ *
+ * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
+ */
+
+ #include <linux/kernel_stat.h>
+ #include <linux/init.h>
+ #include <linux/bootmem.h>
+ #include <linux/err.h>
+ #include <linux/virtio.h>
+ #include <linux/virtio_config.h>
+ #include <linux/slab.h>
+ #include <linux/interrupt.h>
+ #include <linux/virtio_ring.h>
+ #include <linux/pfn.h>
+ #include <linux/async.h>
+ #include <linux/wait.h>
+ #include <linux/list.h>
+ #include <linux/bitops.h>
+ #include <linux/module.h>
+ #include <linux/io.h>
+ #include <linux/kvm_para.h>
+ #include <asm/setup.h>
+ #include <asm/irq.h>
+ #include <asm/cio.h>
+ #include <asm/ccwdev.h>
+
+ /*
+ * virtio related functions
+ */
+
+ struct vq_config_block {
+ __u16 index;
+ __u16 num;
+ } __packed;
+
+ #define VIRTIO_CCW_CONFIG_SIZE 0x100
+ /* same as PCI config space size, should be enough for all drivers */
+
+ struct virtio_ccw_device {
+ struct virtio_device vdev;
+ __u8 *status;
+ __u8 config[VIRTIO_CCW_CONFIG_SIZE];
+ struct ccw_device *cdev;
+ __u32 curr_io;
+ int err;
+ wait_queue_head_t wait_q;
+ spinlock_t lock;
+ struct list_head virtqueues;
+ unsigned long indicators;
+ unsigned long indicators2;
+ struct vq_config_block *config_block;
+ };
+
+ struct vq_info_block {
+ __u64 queue;
+ __u32 align;
+ __u16 index;
+ __u16 num;
+ } __packed;
+
+ struct virtio_feature_desc {
+ __u32 features;
+ __u8 index;
+ } __packed;
+
+ struct virtio_ccw_vq_info {
+ struct virtqueue *vq;
+ int num;
+ void *queue;
+ struct vq_info_block *info_block;
+ struct list_head node;
+ };
+
+ #define KVM_VIRTIO_CCW_RING_ALIGN 4096
+
+ #define KVM_S390_VIRTIO_CCW_NOTIFY 3
+
+ #define CCW_CMD_SET_VQ 0x13
+ #define CCW_CMD_VDEV_RESET 0x33
+ #define CCW_CMD_SET_IND 0x43
+ #define CCW_CMD_SET_CONF_IND 0x53
+ #define CCW_CMD_READ_FEAT 0x12
+ #define CCW_CMD_WRITE_FEAT 0x11
+ #define CCW_CMD_READ_CONF 0x22
+ #define CCW_CMD_WRITE_CONF 0x21
+ #define CCW_CMD_WRITE_STATUS 0x31
+ #define CCW_CMD_READ_VQ_CONF 0x32
+
+ #define VIRTIO_CCW_DOING_SET_VQ 0x00010000
+ #define VIRTIO_CCW_DOING_RESET 0x00040000
+ #define VIRTIO_CCW_DOING_READ_FEAT 0x00080000
+ #define VIRTIO_CCW_DOING_WRITE_FEAT 0x00100000
+ #define VIRTIO_CCW_DOING_READ_CONFIG 0x00200000
+ #define VIRTIO_CCW_DOING_WRITE_CONFIG 0x00400000
+ #define VIRTIO_CCW_DOING_WRITE_STATUS 0x00800000
+ #define VIRTIO_CCW_DOING_SET_IND 0x01000000
+ #define VIRTIO_CCW_DOING_READ_VQ_CONF 0x02000000
+ #define VIRTIO_CCW_DOING_SET_CONF_IND 0x04000000
+ #define VIRTIO_CCW_INTPARM_MASK 0xffff0000
+
+ static struct virtio_ccw_device *to_vc_device(struct virtio_device *vdev)
+ {
+ return container_of(vdev, struct virtio_ccw_device, vdev);
+ }
+
+ static int doing_io(struct virtio_ccw_device *vcdev, __u32 flag)
+ {
+ unsigned long flags;
+ __u32 ret;
+
+ spin_lock_irqsave(get_ccwdev_lock(vcdev->cdev), flags);
+ if (vcdev->err)
+ ret = 0;
+ else
+ ret = vcdev->curr_io & flag;
+ spin_unlock_irqrestore(get_ccwdev_lock(vcdev->cdev), flags);
+ return ret;
+ }
+
+ static int ccw_io_helper(struct virtio_ccw_device *vcdev,
+ struct ccw1 *ccw, __u32 intparm)
+ {
+ int ret;
+ unsigned long flags;
+ int flag = intparm & VIRTIO_CCW_INTPARM_MASK;
+
+ do {
+ spin_lock_irqsave(get_ccwdev_lock(vcdev->cdev), flags);
+ ret = ccw_device_start(vcdev->cdev, ccw, intparm, 0, 0);
+ if (!ret)
+ vcdev->curr_io |= flag;
+ spin_unlock_irqrestore(get_ccwdev_lock(vcdev->cdev), flags);
+ cpu_relax();
+ } while (ret == -EBUSY);
+ wait_event(vcdev->wait_q, doing_io(vcdev, flag) == 0);
+ return ret ? ret : vcdev->err;
+ }
+
+ static inline long do_kvm_notify(struct subchannel_id schid,
+ unsigned long queue_index)
+ {
+ register unsigned long __nr asm("1") = KVM_S390_VIRTIO_CCW_NOTIFY;
+ register struct subchannel_id __schid asm("2") = schid;
+ register unsigned long __index asm("3") = queue_index;
+ register long __rc asm("2");
+
+ asm volatile ("diag 2,4,0x500\n"
+ : "=d" (__rc) : "d" (__nr), "d" (__schid), "d" (__index)
+ : "memory", "cc");
+ return __rc;
+ }
+
+ static void virtio_ccw_kvm_notify(struct virtqueue *vq)
+ {
+ struct virtio_ccw_vq_info *info = vq->priv;
+ struct virtio_ccw_device *vcdev;
+ struct subchannel_id schid;
+
+ vcdev = to_vc_device(info->vq->vdev);
+ ccw_device_get_schid(vcdev->cdev, &schid);
+ do_kvm_notify(schid, virtqueue_get_queue_index(vq));
+ }
+
+ static int virtio_ccw_read_vq_conf(struct virtio_ccw_device *vcdev,
+ struct ccw1 *ccw, int index)
+ {
+ vcdev->config_block->index = index;
+ ccw->cmd_code = CCW_CMD_READ_VQ_CONF;
+ ccw->flags = 0;
+ ccw->count = sizeof(struct vq_config_block);
+ ccw->cda = (__u32)(unsigned long)(vcdev->config_block);
+ ccw_io_helper(vcdev, ccw, VIRTIO_CCW_DOING_READ_VQ_CONF);
+ return vcdev->config_block->num;
+ }
+
+ static void virtio_ccw_del_vq(struct virtqueue *vq, struct ccw1 *ccw)
+ {
+ struct virtio_ccw_device *vcdev = to_vc_device(vq->vdev);
+ struct virtio_ccw_vq_info *info = vq->priv;
+ unsigned long flags;
+ unsigned long size;
+ int ret;
+ unsigned int index = virtqueue_get_queue_index(vq);
+
+ /* Remove from our list. */
+ spin_lock_irqsave(&vcdev->lock, flags);
+ list_del(&info->node);
+ spin_unlock_irqrestore(&vcdev->lock, flags);
+
+ /* Release from host. */
+ info->info_block->queue = 0;
+ info->info_block->align = 0;
+ info->info_block->index = index;
+ info->info_block->num = 0;
+ ccw->cmd_code = CCW_CMD_SET_VQ;
+ ccw->flags = 0;
+ ccw->count = sizeof(*info->info_block);
+ ccw->cda = (__u32)(unsigned long)(info->info_block);
+ ret = ccw_io_helper(vcdev, ccw,
+ VIRTIO_CCW_DOING_SET_VQ | index);
+ /*
+ * -ENODEV isn't considered an error: The device is gone anyway.
+ * This may happen on device detach.
+ */
+ if (ret && (ret != -ENODEV))
+ dev_warn(&vq->vdev->dev, "Error %d while deleting queue %d",
+ ret, index);
+
+ vring_del_virtqueue(vq);
+ size = PAGE_ALIGN(vring_size(info->num, KVM_VIRTIO_CCW_RING_ALIGN));
+ free_pages_exact(info->queue, size);
+ kfree(info->info_block);
+ kfree(info);
+ }
+
+ static void virtio_ccw_del_vqs(struct virtio_device *vdev)
+ {
+ struct virtqueue *vq, *n;
+ struct ccw1 *ccw;
+
+ ccw = kzalloc(sizeof(*ccw), GFP_DMA | GFP_KERNEL);
+ if (!ccw)
+ return;
+
+
+ list_for_each_entry_safe(vq, n, &vdev->vqs, list)
+ virtio_ccw_del_vq(vq, ccw);
+
+ kfree(ccw);
+ }
+
+ static struct virtqueue *virtio_ccw_setup_vq(struct virtio_device *vdev,
+ int i, vq_callback_t *callback,
+ const char *name,
+ struct ccw1 *ccw)
+ {
+ struct virtio_ccw_device *vcdev = to_vc_device(vdev);
+ int err;
+ struct virtqueue *vq = NULL;
+ struct virtio_ccw_vq_info *info;
+ unsigned long size = 0; /* silence the compiler */
+ unsigned long flags;
+
+ /* Allocate queue. */
+ info = kzalloc(sizeof(struct virtio_ccw_vq_info), GFP_KERNEL);
+ if (!info) {
+ dev_warn(&vcdev->cdev->dev, "no info\n");
+ err = -ENOMEM;
+ goto out_err;
+ }
+ info->info_block = kzalloc(sizeof(*info->info_block),
+ GFP_DMA | GFP_KERNEL);
+ if (!info->info_block) {
+ dev_warn(&vcdev->cdev->dev, "no info block\n");
+ err = -ENOMEM;
+ goto out_err;
+ }
+ info->num = virtio_ccw_read_vq_conf(vcdev, ccw, i);
+ size = PAGE_ALIGN(vring_size(info->num, KVM_VIRTIO_CCW_RING_ALIGN));
+ info->queue = alloc_pages_exact(size, GFP_KERNEL | __GFP_ZERO);
+ if (info->queue == NULL) {
+ dev_warn(&vcdev->cdev->dev, "no queue\n");
+ err = -ENOMEM;
+ goto out_err;
+ }
+
+ vq = vring_new_virtqueue(i, info->num, KVM_VIRTIO_CCW_RING_ALIGN, vdev,
+ true, info->queue, virtio_ccw_kvm_notify,
+ callback, name);
+ if (!vq) {
+ /* For now, we fail if we can't get the requested size. */
+ dev_warn(&vcdev->cdev->dev, "no vq\n");
+ err = -ENOMEM;
+ goto out_err;
+ }
+
+ /* Register it with the host. */
+ info->info_block->queue = (__u64)info->queue;
+ info->info_block->align = KVM_VIRTIO_CCW_RING_ALIGN;
+ info->info_block->index = i;
+ info->info_block->num = info->num;
+ ccw->cmd_code = CCW_CMD_SET_VQ;
+ ccw->flags = 0;
+ ccw->count = sizeof(*info->info_block);
+ ccw->cda = (__u32)(unsigned long)(info->info_block);
+ err = ccw_io_helper(vcdev, ccw, VIRTIO_CCW_DOING_SET_VQ | i);
+ if (err) {
+ dev_warn(&vcdev->cdev->dev, "SET_VQ failed\n");
+ goto out_err;
+ }
+
+ info->vq = vq;
+ vq->priv = info;
+
+ /* Save it to our list. */
+ spin_lock_irqsave(&vcdev->lock, flags);
+ list_add(&info->node, &vcdev->virtqueues);
+ spin_unlock_irqrestore(&vcdev->lock, flags);
+
+ return vq;
+
+ out_err:
+ if (vq)
+ vring_del_virtqueue(vq);
+ if (info) {
+ if (info->queue)
+ free_pages_exact(info->queue, size);
+ kfree(info->info_block);
+ }
+ kfree(info);
+ return ERR_PTR(err);
+ }
+
+ static int virtio_ccw_find_vqs(struct virtio_device *vdev, unsigned nvqs,
+ struct virtqueue *vqs[],
+ vq_callback_t *callbacks[],
+ const char *names[])
+ {
+ struct virtio_ccw_device *vcdev = to_vc_device(vdev);
+ unsigned long *indicatorp = NULL;
+ int ret, i;
+ struct ccw1 *ccw;
+
+ ccw = kzalloc(sizeof(*ccw), GFP_DMA | GFP_KERNEL);
+ if (!ccw)
+ return -ENOMEM;
+
+ for (i = 0; i < nvqs; ++i) {
+ vqs[i] = virtio_ccw_setup_vq(vdev, i, callbacks[i], names[i],
+ ccw);
+ if (IS_ERR(vqs[i])) {
+ ret = PTR_ERR(vqs[i]);
+ vqs[i] = NULL;
+ goto out;
+ }
+ }
+ ret = -ENOMEM;
+ /* We need a data area under 2G to communicate. */
+ indicatorp = kmalloc(sizeof(&vcdev->indicators), GFP_DMA | GFP_KERNEL);
+ if (!indicatorp)
+ goto out;
+ *indicatorp = (unsigned long) &vcdev->indicators;
+ /* Register queue indicators with host. */
+ vcdev->indicators = 0;
+ ccw->cmd_code = CCW_CMD_SET_IND;
+ ccw->flags = 0;
+ ccw->count = sizeof(vcdev->indicators);
+ ccw->cda = (__u32)(unsigned long) indicatorp;
+ ret = ccw_io_helper(vcdev, ccw, VIRTIO_CCW_DOING_SET_IND);
+ if (ret)
+ goto out;
+ /* Register indicators2 with host for config changes */
+ *indicatorp = (unsigned long) &vcdev->indicators2;
+ vcdev->indicators2 = 0;
+ ccw->cmd_code = CCW_CMD_SET_CONF_IND;
+ ccw->flags = 0;
+ ccw->count = sizeof(vcdev->indicators2);
+ ccw->cda = (__u32)(unsigned long) indicatorp;
+ ret = ccw_io_helper(vcdev, ccw, VIRTIO_CCW_DOING_SET_CONF_IND);
+ if (ret)
+ goto out;
+
+ kfree(indicatorp);
+ kfree(ccw);
+ return 0;
+ out:
+ kfree(indicatorp);
+ kfree(ccw);
+ virtio_ccw_del_vqs(vdev);
+ return ret;
+ }
+
+ static void virtio_ccw_reset(struct virtio_device *vdev)
+ {
+ struct virtio_ccw_device *vcdev = to_vc_device(vdev);
+ struct ccw1 *ccw;
+
+ ccw = kzalloc(sizeof(*ccw), GFP_DMA | GFP_KERNEL);
+ if (!ccw)
+ return;
+
+ /* Zero status bits. */
+ *vcdev->status = 0;
+
+ /* Send a reset ccw on device. */
+ ccw->cmd_code = CCW_CMD_VDEV_RESET;
+ ccw->flags = 0;
+ ccw->count = 0;
+ ccw->cda = 0;
+ ccw_io_helper(vcdev, ccw, VIRTIO_CCW_DOING_RESET);
+ kfree(ccw);
+ }
+
+ static u32 virtio_ccw_get_features(struct virtio_device *vdev)
+ {
+ struct virtio_ccw_device *vcdev = to_vc_device(vdev);
+ struct virtio_feature_desc *features;
+ int ret, rc;
+ struct ccw1 *ccw;
+
+ ccw = kzalloc(sizeof(*ccw), GFP_DMA | GFP_KERNEL);
+ if (!ccw)
+ return 0;
+
+ features = kzalloc(sizeof(*features), GFP_DMA | GFP_KERNEL);
+ if (!features) {
+ rc = 0;
+ goto out_free;
+ }
+ /* Read the feature bits from the host. */
+ /* TODO: Features > 32 bits */
+ features->index = 0;
+ ccw->cmd_code = CCW_CMD_READ_FEAT;
+ ccw->flags = 0;
+ ccw->count = sizeof(*features);
+ ccw->cda = (__u32)(unsigned long)features;
+ ret = ccw_io_helper(vcdev, ccw, VIRTIO_CCW_DOING_READ_FEAT);
+ if (ret) {
+ rc = 0;
+ goto out_free;
+ }
+
+ rc = le32_to_cpu(features->features);
+
+ out_free:
+ kfree(features);
+ kfree(ccw);
+ return rc;
+ }
+
+ static void virtio_ccw_finalize_features(struct virtio_device *vdev)
+ {
+ struct virtio_ccw_device *vcdev = to_vc_device(vdev);
+ struct virtio_feature_desc *features;
+ int i;
+ struct ccw1 *ccw;
+
+ ccw = kzalloc(sizeof(*ccw), GFP_DMA | GFP_KERNEL);
+ if (!ccw)
+ return;
+
+ features = kzalloc(sizeof(*features), GFP_DMA | GFP_KERNEL);
+ if (!features)
+ goto out_free;
+
+ /* Give virtio_ring a chance to accept features. */
+ vring_transport_features(vdev);
+
+ for (i = 0; i < sizeof(*vdev->features) / sizeof(features->features);
+ i++) {
+ int highbits = i % 2 ? 32 : 0;
+ features->index = i;
+ features->features = cpu_to_le32(vdev->features[i / 2]
+ >> highbits);
+ /* Write the feature bits to the host. */
+ ccw->cmd_code = CCW_CMD_WRITE_FEAT;
+ ccw->flags = 0;
+ ccw->count = sizeof(*features);
+ ccw->cda = (__u32)(unsigned long)features;
+ ccw_io_helper(vcdev, ccw, VIRTIO_CCW_DOING_WRITE_FEAT);
+ }
+ out_free:
+ kfree(features);
+ kfree(ccw);
+ }
+
+ static void virtio_ccw_get_config(struct virtio_device *vdev,
+ unsigned int offset, void *buf, unsigned len)
+ {
+ struct virtio_ccw_device *vcdev = to_vc_device(vdev);
+ int ret;
+ struct ccw1 *ccw;
+ void *config_area;
+
+ ccw = kzalloc(sizeof(*ccw), GFP_DMA | GFP_KERNEL);
+ if (!ccw)
+ return;
+
+ config_area = kzalloc(VIRTIO_CCW_CONFIG_SIZE, GFP_DMA | GFP_KERNEL);
+ if (!config_area)
+ goto out_free;
+
+ /* Read the config area from the host. */
+ ccw->cmd_code = CCW_CMD_READ_CONF;
+ ccw->flags = 0;
+ ccw->count = offset + len;
+ ccw->cda = (__u32)(unsigned long)config_area;
+ ret = ccw_io_helper(vcdev, ccw, VIRTIO_CCW_DOING_READ_CONFIG);
+ if (ret)
+ goto out_free;
+
+ memcpy(vcdev->config, config_area, sizeof(vcdev->config));
+ memcpy(buf, &vcdev->config[offset], len);
+
+ out_free:
+ kfree(config_area);
+ kfree(ccw);
+ }
+
+ static void virtio_ccw_set_config(struct virtio_device *vdev,
+ unsigned int offset, const void *buf,
+ unsigned len)
+ {
+ struct virtio_ccw_device *vcdev = to_vc_device(vdev);
+ struct ccw1 *ccw;
+ void *config_area;
+
+ ccw = kzalloc(sizeof(*ccw), GFP_DMA | GFP_KERNEL);
+ if (!ccw)
+ return;
+
+ config_area = kzalloc(VIRTIO_CCW_CONFIG_SIZE, GFP_DMA | GFP_KERNEL);
+ if (!config_area)
+ goto out_free;
+
+ memcpy(&vcdev->config[offset], buf, len);
+ /* Write the config area to the host. */
+ memcpy(config_area, vcdev->config, sizeof(vcdev->config));
+ ccw->cmd_code = CCW_CMD_WRITE_CONF;
+ ccw->flags = 0;
+ ccw->count = offset + len;
+ ccw->cda = (__u32)(unsigned long)config_area;
+ ccw_io_helper(vcdev, ccw, VIRTIO_CCW_DOING_WRITE_CONFIG);
+
+ out_free:
+ kfree(config_area);
+ kfree(ccw);
+ }
+
+ static u8 virtio_ccw_get_status(struct virtio_device *vdev)
+ {
+ struct virtio_ccw_device *vcdev = to_vc_device(vdev);
+
+ return *vcdev->status;
+ }
+
+ static void virtio_ccw_set_status(struct virtio_device *vdev, u8 status)
+ {
+ struct virtio_ccw_device *vcdev = to_vc_device(vdev);
+ struct ccw1 *ccw;
+
+ ccw = kzalloc(sizeof(*ccw), GFP_DMA | GFP_KERNEL);
+ if (!ccw)
+ return;
+
+ /* Write the status to the host. */
+ *vcdev->status = status;
+ ccw->cmd_code = CCW_CMD_WRITE_STATUS;
+ ccw->flags = 0;
+ ccw->count = sizeof(status);
+ ccw->cda = (__u32)(unsigned long)vcdev->status;
+ ccw_io_helper(vcdev, ccw, VIRTIO_CCW_DOING_WRITE_STATUS);
+ kfree(ccw);
+ }
+
+ static struct virtio_config_ops virtio_ccw_config_ops = {
+ .get_features = virtio_ccw_get_features,
+ .finalize_features = virtio_ccw_finalize_features,
+ .get = virtio_ccw_get_config,
+ .set = virtio_ccw_set_config,
+ .get_status = virtio_ccw_get_status,
+ .set_status = virtio_ccw_set_status,
+ .reset = virtio_ccw_reset,
+ .find_vqs = virtio_ccw_find_vqs,
+ .del_vqs = virtio_ccw_del_vqs,
+ };
+
+
+ /*
+ * ccw bus driver related functions
+ */
+
+ static void virtio_ccw_release_dev(struct device *_d)
+ {
+ struct virtio_device *dev = container_of(_d, struct virtio_device,
+ dev);
+ struct virtio_ccw_device *vcdev = to_vc_device(dev);
+
+ kfree(vcdev->status);
+ kfree(vcdev->config_block);
+ kfree(vcdev);
+ }
+
+ static int irb_is_error(struct irb *irb)
+ {
+ if (scsw_cstat(&irb->scsw) != 0)
+ return 1;
+ if (scsw_dstat(&irb->scsw) & ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END))
+ return 1;
+ if (scsw_cc(&irb->scsw) != 0)
+ return 1;
+ return 0;
+ }
+
+ static struct virtqueue *virtio_ccw_vq_by_ind(struct virtio_ccw_device *vcdev,
+ int index)
+ {
+ struct virtio_ccw_vq_info *info;
+ unsigned long flags;
+ struct virtqueue *vq;
+
+ vq = NULL;
+ spin_lock_irqsave(&vcdev->lock, flags);
+ list_for_each_entry(info, &vcdev->virtqueues, node) {
+ if (virtqueue_get_queue_index(info->vq) == index) {
+ vq = info->vq;
+ break;
+ }
+ }
+ spin_unlock_irqrestore(&vcdev->lock, flags);
+ return vq;
+ }
+
+ static void virtio_ccw_int_handler(struct ccw_device *cdev,
+ unsigned long intparm,
+ struct irb *irb)
+ {
+ __u32 activity = intparm & VIRTIO_CCW_INTPARM_MASK;
+ struct virtio_ccw_device *vcdev = dev_get_drvdata(&cdev->dev);
+ int i;
+ struct virtqueue *vq;
+ struct virtio_driver *drv;
+
+ /* Check if it's a notification from the host. */
+ if ((intparm == 0) &&
+ (scsw_stctl(&irb->scsw) ==
+ (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND))) {
+ /* OK */
+ }
+ if (irb_is_error(irb))
+ vcdev->err = -EIO; /* XXX - use real error */
+ if (vcdev->curr_io & activity) {
+ switch (activity) {
+ case VIRTIO_CCW_DOING_READ_FEAT:
+ case VIRTIO_CCW_DOING_WRITE_FEAT:
+ case VIRTIO_CCW_DOING_READ_CONFIG:
+ case VIRTIO_CCW_DOING_WRITE_CONFIG:
+ case VIRTIO_CCW_DOING_WRITE_STATUS:
+ case VIRTIO_CCW_DOING_SET_VQ:
+ case VIRTIO_CCW_DOING_SET_IND:
+ case VIRTIO_CCW_DOING_SET_CONF_IND:
+ case VIRTIO_CCW_DOING_RESET:
+ case VIRTIO_CCW_DOING_READ_VQ_CONF:
+ vcdev->curr_io &= ~activity;
+ wake_up(&vcdev->wait_q);
+ break;
+ default:
+ /* don't know what to do... */
+ dev_warn(&cdev->dev, "Suspicious activity '%08x'\n",
+ activity);
+ WARN_ON(1);
+ break;
+ }
+ }
+ for_each_set_bit(i, &vcdev->indicators,
+ sizeof(vcdev->indicators) * BITS_PER_BYTE) {
+ /* The bit clear must happen before the vring kick. */
+ clear_bit(i, &vcdev->indicators);
+ barrier();
+ vq = virtio_ccw_vq_by_ind(vcdev, i);
+ vring_interrupt(0, vq);
+ }
+ if (test_bit(0, &vcdev->indicators2)) {
+ drv = container_of(vcdev->vdev.dev.driver,
+ struct virtio_driver, driver);
+
+ if (drv && drv->config_changed)
+ drv->config_changed(&vcdev->vdev);
+ clear_bit(0, &vcdev->indicators2);
+ }
+ }
+
+ /*
+ * We usually want to autoonline all devices, but give the admin
+ * a way to exempt devices from this.
+ */
+ #define __DEV_WORDS ((__MAX_SUBCHANNEL + (8*sizeof(long) - 1)) / \
+ (8*sizeof(long)))
+ static unsigned long devs_no_auto[__MAX_SSID + 1][__DEV_WORDS];
+
+ static char *no_auto = "";
+
+ module_param(no_auto, charp, 0444);
+ MODULE_PARM_DESC(no_auto, "list of ccw bus id ranges not to be auto-onlined");
+
+ static int virtio_ccw_check_autoonline(struct ccw_device *cdev)
+ {
+ struct ccw_dev_id id;
+
+ ccw_device_get_id(cdev, &id);
+ if (test_bit(id.devno, devs_no_auto[id.ssid]))
+ return 0;
+ return 1;
+ }
+
+ static void virtio_ccw_auto_online(void *data, async_cookie_t cookie)
+ {
+ struct ccw_device *cdev = data;
+ int ret;
+
+ ret = ccw_device_set_online(cdev);
+ if (ret)
+ dev_warn(&cdev->dev, "Failed to set online: %d\n", ret);
+ }
+
+ static int virtio_ccw_probe(struct ccw_device *cdev)
+ {
+ cdev->handler = virtio_ccw_int_handler;
+
+ if (virtio_ccw_check_autoonline(cdev))
+ async_schedule(virtio_ccw_auto_online, cdev);
+ return 0;
+ }
+
+ static void virtio_ccw_remove(struct ccw_device *cdev)
+ {
+ struct virtio_ccw_device *vcdev = dev_get_drvdata(&cdev->dev);
+
+ if (cdev->online) {
+ unregister_virtio_device(&vcdev->vdev);
+ dev_set_drvdata(&cdev->dev, NULL);
+ }
+ cdev->handler = NULL;
+ }
+
+ static int virtio_ccw_offline(struct ccw_device *cdev)
+ {
+ struct virtio_ccw_device *vcdev = dev_get_drvdata(&cdev->dev);
+
+ unregister_virtio_device(&vcdev->vdev);
+ dev_set_drvdata(&cdev->dev, NULL);
+ return 0;
+ }
+
+
+ static int virtio_ccw_online(struct ccw_device *cdev)
+ {
+ int ret;
+ struct virtio_ccw_device *vcdev;
+
+ vcdev = kzalloc(sizeof(*vcdev), GFP_KERNEL);
+ if (!vcdev) {
+ dev_warn(&cdev->dev, "Could not get memory for virtio\n");
+ ret = -ENOMEM;
+ goto out_free;
+ }
+ vcdev->config_block = kzalloc(sizeof(*vcdev->config_block),
+ GFP_DMA | GFP_KERNEL);
+ if (!vcdev->config_block) {
+ ret = -ENOMEM;
+ goto out_free;
+ }
+ vcdev->status = kzalloc(sizeof(*vcdev->status), GFP_DMA | GFP_KERNEL);
+ if (!vcdev->status) {
+ ret = -ENOMEM;
+ goto out_free;
+ }
+
+ vcdev->vdev.dev.parent = &cdev->dev;
+ vcdev->vdev.dev.release = virtio_ccw_release_dev;
+ vcdev->vdev.config = &virtio_ccw_config_ops;
+ vcdev->cdev = cdev;
+ init_waitqueue_head(&vcdev->wait_q);
+ INIT_LIST_HEAD(&vcdev->virtqueues);
+ spin_lock_init(&vcdev->lock);
+
+ dev_set_drvdata(&cdev->dev, vcdev);
+ vcdev->vdev.id.vendor = cdev->id.cu_type;
+ vcdev->vdev.id.device = cdev->id.cu_model;
+ ret = register_virtio_device(&vcdev->vdev);
+ if (ret) {
+ dev_warn(&cdev->dev, "Failed to register virtio device: %d\n",
+ ret);
+ goto out_put;
+ }
+ return 0;
+ out_put:
+ dev_set_drvdata(&cdev->dev, NULL);
+ put_device(&vcdev->vdev.dev);
+ return ret;
+ out_free:
+ if (vcdev) {
+ kfree(vcdev->status);
+ kfree(vcdev->config_block);
+ }
+ kfree(vcdev);
+ return ret;
+ }
+
+ static int virtio_ccw_cio_notify(struct ccw_device *cdev, int event)
+ {
+ /* TODO: Check whether we need special handling here. */
+ return 0;
+ }
+
+ static struct ccw_device_id virtio_ids[] = {
+ { CCW_DEVICE(0x3832, 0) },
+ {},
+ };
+ MODULE_DEVICE_TABLE(ccw, virtio_ids);
+
+ static struct ccw_driver virtio_ccw_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "virtio_ccw",
+ },
+ .ids = virtio_ids,
+ .probe = virtio_ccw_probe,
+ .remove = virtio_ccw_remove,
+ .set_offline = virtio_ccw_offline,
+ .set_online = virtio_ccw_online,
+ .notify = virtio_ccw_cio_notify,
++ .int_class = IRQIO_VIR,
+ };
+
+ static int __init pure_hex(char **cp, unsigned int *val, int min_digit,
+ int max_digit, int max_val)
+ {
+ int diff;
+
+ diff = 0;
+ *val = 0;
+
+ while (diff <= max_digit) {
+ int value = hex_to_bin(**cp);
+
+ if (value < 0)
+ break;
+ *val = *val * 16 + value;
+ (*cp)++;
+ diff++;
+ }
+
+ if ((diff < min_digit) || (diff > max_digit) || (*val > max_val))
+ return 1;
+
+ return 0;
+ }
+
+ static int __init parse_busid(char *str, unsigned int *cssid,
+ unsigned int *ssid, unsigned int *devno)
+ {
+ char *str_work;
+ int rc, ret;
+
+ rc = 1;
+
+ if (*str == '\0')
+ goto out;
+
+ str_work = str;
+ ret = pure_hex(&str_work, cssid, 1, 2, __MAX_CSSID);
+ if (ret || (str_work[0] != '.'))
+ goto out;
+ str_work++;
+ ret = pure_hex(&str_work, ssid, 1, 1, __MAX_SSID);
+ if (ret || (str_work[0] != '.'))
+ goto out;
+ str_work++;
+ ret = pure_hex(&str_work, devno, 4, 4, __MAX_SUBCHANNEL);
+ if (ret || (str_work[0] != '\0'))
+ goto out;
+
+ rc = 0;
+ out:
+ return rc;
+ }
+
+ static void __init no_auto_parse(void)
+ {
+ unsigned int from_cssid, to_cssid, from_ssid, to_ssid, from, to;
+ char *parm, *str;
+ int rc;
+
+ str = no_auto;
+ while ((parm = strsep(&str, ","))) {
+ rc = parse_busid(strsep(&parm, "-"), &from_cssid,
+ &from_ssid, &from);
+ if (rc)
+ continue;
+ if (parm != NULL) {
+ rc = parse_busid(parm, &to_cssid,
+ &to_ssid, &to);
+ if ((from_ssid > to_ssid) ||
+ ((from_ssid == to_ssid) && (from > to)))
+ rc = -EINVAL;
+ } else {
+ to_cssid = from_cssid;
+ to_ssid = from_ssid;
+ to = from;
+ }
+ if (rc)
+ continue;
+ while ((from_ssid < to_ssid) ||
+ ((from_ssid == to_ssid) && (from <= to))) {
+ set_bit(from, devs_no_auto[from_ssid]);
+ from++;
+ if (from > __MAX_SUBCHANNEL) {
+ from_ssid++;
+ from = 0;
+ }
+ }
+ }
+ }
+
+ static int __init virtio_ccw_init(void)
+ {
+ /* parse no_auto string before we do anything further */
+ no_auto_parse();
+ return ccw_driver_register(&virtio_ccw_driver);
+ }
+ module_init(virtio_ccw_init);
+
+ static void __exit virtio_ccw_exit(void)
+ {
+ ccw_driver_unregister(&virtio_ccw_driver);
+ }
+ module_exit(virtio_ccw_exit);
projects / cascardo / linux.git / commitdiff