forked from luck/tmp_suning_uos_patched
VMCI: guest side driver implementation.
VMCI guest side driver code implementation. Signed-off-by: George Zhang <georgezhang@vmware.com> Acked-by: Andy king <acking@vmware.com> Acked-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
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759
drivers/misc/vmw_vmci/vmci_guest.c
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759
drivers/misc/vmw_vmci/vmci_guest.c
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/*
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* VMware VMCI Driver
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*
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* Copyright (C) 2012 VMware, Inc. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation version 2 and no later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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#include <linux/vmw_vmci_defs.h>
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#include <linux/vmw_vmci_api.h>
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#include <linux/moduleparam.h>
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#include <linux/interrupt.h>
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#include <linux/highmem.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/sched.h>
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#include <linux/init.h>
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#include <linux/pci.h>
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#include <linux/smp.h>
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#include <linux/io.h>
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#include "vmci_datagram.h"
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#include "vmci_doorbell.h"
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#include "vmci_context.h"
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#include "vmci_driver.h"
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#include "vmci_event.h"
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#define PCI_VENDOR_ID_VMWARE 0x15AD
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#define PCI_DEVICE_ID_VMWARE_VMCI 0x0740
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#define VMCI_UTIL_NUM_RESOURCES 1
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static bool vmci_disable_msi;
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module_param_named(disable_msi, vmci_disable_msi, bool, 0);
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MODULE_PARM_DESC(disable_msi, "Disable MSI use in driver - (default=0)");
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static bool vmci_disable_msix;
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module_param_named(disable_msix, vmci_disable_msix, bool, 0);
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MODULE_PARM_DESC(disable_msix, "Disable MSI-X use in driver - (default=0)");
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static u32 ctx_update_sub_id = VMCI_INVALID_ID;
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static u32 vm_context_id = VMCI_INVALID_ID;
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struct vmci_guest_device {
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struct device *dev; /* PCI device we are attached to */
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void __iomem *iobase;
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unsigned int irq;
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unsigned int intr_type;
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bool exclusive_vectors;
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struct msix_entry msix_entries[VMCI_MAX_INTRS];
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struct tasklet_struct datagram_tasklet;
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struct tasklet_struct bm_tasklet;
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void *data_buffer;
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void *notification_bitmap;
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};
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/* vmci_dev singleton device and supporting data*/
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static struct vmci_guest_device *vmci_dev_g;
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static DEFINE_SPINLOCK(vmci_dev_spinlock);
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static atomic_t vmci_num_guest_devices = ATOMIC_INIT(0);
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bool vmci_guest_code_active(void)
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{
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return atomic_read(&vmci_num_guest_devices) != 0;
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}
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u32 vmci_get_vm_context_id(void)
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{
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if (vm_context_id == VMCI_INVALID_ID) {
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u32 result;
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struct vmci_datagram get_cid_msg;
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get_cid_msg.dst =
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vmci_make_handle(VMCI_HYPERVISOR_CONTEXT_ID,
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VMCI_GET_CONTEXT_ID);
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get_cid_msg.src = VMCI_ANON_SRC_HANDLE;
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get_cid_msg.payload_size = 0;
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result = vmci_send_datagram(&get_cid_msg);
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if (result >= 0)
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vm_context_id = result;
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}
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return vm_context_id;
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}
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/*
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* VM to hypervisor call mechanism. We use the standard VMware naming
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* convention since shared code is calling this function as well.
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*/
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int vmci_send_datagram(struct vmci_datagram *dg)
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{
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unsigned long flags;
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int result;
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/* Check args. */
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if (dg == NULL)
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return VMCI_ERROR_INVALID_ARGS;
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/*
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* Need to acquire spinlock on the device because the datagram
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* data may be spread over multiple pages and the monitor may
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* interleave device user rpc calls from multiple
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* VCPUs. Acquiring the spinlock precludes that
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* possibility. Disabling interrupts to avoid incoming
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* datagrams during a "rep out" and possibly landing up in
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* this function.
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*/
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spin_lock_irqsave(&vmci_dev_spinlock, flags);
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if (vmci_dev_g) {
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iowrite8_rep(vmci_dev_g->iobase + VMCI_DATA_OUT_ADDR,
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dg, VMCI_DG_SIZE(dg));
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result = ioread32(vmci_dev_g->iobase + VMCI_RESULT_LOW_ADDR);
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} else {
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result = VMCI_ERROR_UNAVAILABLE;
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}
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spin_unlock_irqrestore(&vmci_dev_spinlock, flags);
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return result;
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}
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EXPORT_SYMBOL_GPL(vmci_send_datagram);
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/*
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* Gets called with the new context id if updated or resumed.
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* Context id.
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*/
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static void vmci_guest_cid_update(u32 sub_id,
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const struct vmci_event_data *event_data,
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void *client_data)
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{
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const struct vmci_event_payld_ctx *ev_payload =
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vmci_event_data_const_payload(event_data);
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if (sub_id != ctx_update_sub_id) {
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pr_devel("Invalid subscriber (ID=0x%x)\n", sub_id);
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return;
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}
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if (!event_data || ev_payload->context_id == VMCI_INVALID_ID) {
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pr_devel("Invalid event data\n");
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return;
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}
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pr_devel("Updating context from (ID=0x%x) to (ID=0x%x) on event (type=%d)\n",
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vm_context_id, ev_payload->context_id, event_data->event);
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vm_context_id = ev_payload->context_id;
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}
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/*
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* Verify that the host supports the hypercalls we need. If it does not,
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* try to find fallback hypercalls and use those instead. Returns
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* true if required hypercalls (or fallback hypercalls) are
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* supported by the host, false otherwise.
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*/
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static bool vmci_check_host_caps(struct pci_dev *pdev)
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{
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bool result;
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struct vmci_resource_query_msg *msg;
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u32 msg_size = sizeof(struct vmci_resource_query_hdr) +
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VMCI_UTIL_NUM_RESOURCES * sizeof(u32);
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struct vmci_datagram *check_msg;
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check_msg = kmalloc(msg_size, GFP_KERNEL);
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if (!check_msg) {
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dev_err(&pdev->dev, "%s: Insufficient memory\n", __func__);
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return false;
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}
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check_msg->dst = vmci_make_handle(VMCI_HYPERVISOR_CONTEXT_ID,
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VMCI_RESOURCES_QUERY);
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check_msg->src = VMCI_ANON_SRC_HANDLE;
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check_msg->payload_size = msg_size - VMCI_DG_HEADERSIZE;
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msg = (struct vmci_resource_query_msg *)VMCI_DG_PAYLOAD(check_msg);
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msg->num_resources = VMCI_UTIL_NUM_RESOURCES;
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msg->resources[0] = VMCI_GET_CONTEXT_ID;
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/* Checks that hyper calls are supported */
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result = vmci_send_datagram(check_msg) == 0x01;
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kfree(check_msg);
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dev_dbg(&pdev->dev, "%s: Host capability check: %s\n",
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__func__, result ? "PASSED" : "FAILED");
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/* We need the vector. There are no fallbacks. */
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return result;
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}
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/*
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* Reads datagrams from the data in port and dispatches them. We
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* always start reading datagrams into only the first page of the
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* datagram buffer. If the datagrams don't fit into one page, we
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* use the maximum datagram buffer size for the remainder of the
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* invocation. This is a simple heuristic for not penalizing
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* small datagrams.
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*
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* This function assumes that it has exclusive access to the data
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* in port for the duration of the call.
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*/
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static void vmci_dispatch_dgs(unsigned long data)
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{
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struct vmci_guest_device *vmci_dev = (struct vmci_guest_device *)data;
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u8 *dg_in_buffer = vmci_dev->data_buffer;
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struct vmci_datagram *dg;
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size_t dg_in_buffer_size = VMCI_MAX_DG_SIZE;
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size_t current_dg_in_buffer_size = PAGE_SIZE;
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size_t remaining_bytes;
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BUILD_BUG_ON(VMCI_MAX_DG_SIZE < PAGE_SIZE);
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ioread8_rep(vmci_dev->iobase + VMCI_DATA_IN_ADDR,
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vmci_dev->data_buffer, current_dg_in_buffer_size);
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dg = (struct vmci_datagram *)dg_in_buffer;
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remaining_bytes = current_dg_in_buffer_size;
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while (dg->dst.resource != VMCI_INVALID_ID ||
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remaining_bytes > PAGE_SIZE) {
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unsigned dg_in_size;
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/*
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* When the input buffer spans multiple pages, a datagram can
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* start on any page boundary in the buffer.
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*/
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if (dg->dst.resource == VMCI_INVALID_ID) {
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dg = (struct vmci_datagram *)roundup(
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(uintptr_t)dg + 1, PAGE_SIZE);
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remaining_bytes =
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(size_t)(dg_in_buffer +
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current_dg_in_buffer_size -
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(u8 *)dg);
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continue;
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}
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dg_in_size = VMCI_DG_SIZE_ALIGNED(dg);
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if (dg_in_size <= dg_in_buffer_size) {
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int result;
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/*
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* If the remaining bytes in the datagram
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* buffer doesn't contain the complete
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* datagram, we first make sure we have enough
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* room for it and then we read the reminder
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* of the datagram and possibly any following
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* datagrams.
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*/
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if (dg_in_size > remaining_bytes) {
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if (remaining_bytes !=
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current_dg_in_buffer_size) {
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/*
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* We move the partial
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* datagram to the front and
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* read the reminder of the
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* datagram and possibly
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* following calls into the
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* following bytes.
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*/
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memmove(dg_in_buffer, dg_in_buffer +
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current_dg_in_buffer_size -
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remaining_bytes,
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remaining_bytes);
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dg = (struct vmci_datagram *)
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dg_in_buffer;
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}
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if (current_dg_in_buffer_size !=
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dg_in_buffer_size)
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current_dg_in_buffer_size =
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dg_in_buffer_size;
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ioread8_rep(vmci_dev->iobase +
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VMCI_DATA_IN_ADDR,
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vmci_dev->data_buffer +
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remaining_bytes,
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current_dg_in_buffer_size -
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remaining_bytes);
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}
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/*
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* We special case event datagrams from the
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* hypervisor.
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*/
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if (dg->src.context == VMCI_HYPERVISOR_CONTEXT_ID &&
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dg->dst.resource == VMCI_EVENT_HANDLER) {
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result = vmci_event_dispatch(dg);
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} else {
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result = vmci_datagram_invoke_guest_handler(dg);
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}
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if (result < VMCI_SUCCESS)
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dev_dbg(vmci_dev->dev,
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"Datagram with resource (ID=0x%x) failed (err=%d)\n",
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dg->dst.resource, result);
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/* On to the next datagram. */
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dg = (struct vmci_datagram *)((u8 *)dg +
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dg_in_size);
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} else {
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size_t bytes_to_skip;
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/*
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* Datagram doesn't fit in datagram buffer of maximal
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* size. We drop it.
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*/
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dev_dbg(vmci_dev->dev,
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"Failed to receive datagram (size=%u bytes)\n",
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dg_in_size);
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bytes_to_skip = dg_in_size - remaining_bytes;
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if (current_dg_in_buffer_size != dg_in_buffer_size)
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current_dg_in_buffer_size = dg_in_buffer_size;
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for (;;) {
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ioread8_rep(vmci_dev->iobase +
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VMCI_DATA_IN_ADDR,
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vmci_dev->data_buffer,
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current_dg_in_buffer_size);
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if (bytes_to_skip <= current_dg_in_buffer_size)
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break;
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bytes_to_skip -= current_dg_in_buffer_size;
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}
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dg = (struct vmci_datagram *)(dg_in_buffer +
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bytes_to_skip);
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}
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remaining_bytes =
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(size_t) (dg_in_buffer + current_dg_in_buffer_size -
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(u8 *)dg);
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if (remaining_bytes < VMCI_DG_HEADERSIZE) {
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/* Get the next batch of datagrams. */
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ioread8_rep(vmci_dev->iobase + VMCI_DATA_IN_ADDR,
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vmci_dev->data_buffer,
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current_dg_in_buffer_size);
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dg = (struct vmci_datagram *)dg_in_buffer;
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remaining_bytes = current_dg_in_buffer_size;
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}
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}
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}
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/*
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* Scans the notification bitmap for raised flags, clears them
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* and handles the notifications.
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*/
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static void vmci_process_bitmap(unsigned long data)
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{
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struct vmci_guest_device *dev = (struct vmci_guest_device *)data;
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if (!dev->notification_bitmap) {
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dev_dbg(dev->dev, "No bitmap present in %s\n", __func__);
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return;
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}
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vmci_dbell_scan_notification_entries(dev->notification_bitmap);
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}
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/*
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* Enable MSI-X. Try exclusive vectors first, then shared vectors.
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*/
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static int vmci_enable_msix(struct pci_dev *pdev,
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struct vmci_guest_device *vmci_dev)
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{
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int i;
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int result;
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for (i = 0; i < VMCI_MAX_INTRS; ++i) {
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vmci_dev->msix_entries[i].entry = i;
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vmci_dev->msix_entries[i].vector = i;
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}
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result = pci_enable_msix(pdev, vmci_dev->msix_entries, VMCI_MAX_INTRS);
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if (result == 0)
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vmci_dev->exclusive_vectors = true;
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else if (result > 0)
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result = pci_enable_msix(pdev, vmci_dev->msix_entries, 1);
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return result;
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}
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/*
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* Interrupt handler for legacy or MSI interrupt, or for first MSI-X
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* interrupt (vector VMCI_INTR_DATAGRAM).
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*/
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static irqreturn_t vmci_interrupt(int irq, void *_dev)
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{
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struct vmci_guest_device *dev = _dev;
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/*
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* If we are using MSI-X with exclusive vectors then we simply schedule
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* the datagram tasklet, since we know the interrupt was meant for us.
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* Otherwise we must read the ICR to determine what to do.
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*/
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if (dev->intr_type == VMCI_INTR_TYPE_MSIX && dev->exclusive_vectors) {
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tasklet_schedule(&dev->datagram_tasklet);
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} else {
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unsigned int icr;
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/* Acknowledge interrupt and determine what needs doing. */
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icr = ioread32(dev->iobase + VMCI_ICR_ADDR);
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if (icr == 0 || icr == ~0)
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return IRQ_NONE;
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if (icr & VMCI_ICR_DATAGRAM) {
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tasklet_schedule(&dev->datagram_tasklet);
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icr &= ~VMCI_ICR_DATAGRAM;
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}
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if (icr & VMCI_ICR_NOTIFICATION) {
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tasklet_schedule(&dev->bm_tasklet);
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icr &= ~VMCI_ICR_NOTIFICATION;
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}
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if (icr != 0)
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dev_warn(dev->dev,
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"Ignoring unknown interrupt cause (%d)\n",
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icr);
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}
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return IRQ_HANDLED;
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}
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/*
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* Interrupt handler for MSI-X interrupt vector VMCI_INTR_NOTIFICATION,
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* which is for the notification bitmap. Will only get called if we are
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* using MSI-X with exclusive vectors.
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*/
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static irqreturn_t vmci_interrupt_bm(int irq, void *_dev)
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{
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struct vmci_guest_device *dev = _dev;
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/* For MSI-X we can just assume it was meant for us. */
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tasklet_schedule(&dev->bm_tasklet);
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return IRQ_HANDLED;
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}
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/*
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* Most of the initialization at module load time is done here.
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*/
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static int vmci_guest_probe_device(struct pci_dev *pdev,
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const struct pci_device_id *id)
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{
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struct vmci_guest_device *vmci_dev;
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void __iomem *iobase;
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unsigned int capabilities;
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unsigned long cmd;
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int vmci_err;
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int error;
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||||
dev_dbg(&pdev->dev, "Probing for vmci/PCI guest device\n");
|
||||
|
||||
error = pcim_enable_device(pdev);
|
||||
if (error) {
|
||||
dev_err(&pdev->dev,
|
||||
"Failed to enable VMCI device: %d\n", error);
|
||||
return error;
|
||||
}
|
||||
|
||||
error = pcim_iomap_regions(pdev, 1 << 0, KBUILD_MODNAME);
|
||||
if (error) {
|
||||
dev_err(&pdev->dev, "Failed to reserve/map IO regions\n");
|
||||
return error;
|
||||
}
|
||||
|
||||
iobase = pcim_iomap_table(pdev)[0];
|
||||
|
||||
dev_info(&pdev->dev, "Found VMCI PCI device at %#lx, irq %u\n",
|
||||
(unsigned long)iobase, pdev->irq);
|
||||
|
||||
vmci_dev = devm_kzalloc(&pdev->dev, sizeof(*vmci_dev), GFP_KERNEL);
|
||||
if (!vmci_dev) {
|
||||
dev_err(&pdev->dev,
|
||||
"Can't allocate memory for VMCI device\n");
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
vmci_dev->dev = &pdev->dev;
|
||||
vmci_dev->intr_type = VMCI_INTR_TYPE_INTX;
|
||||
vmci_dev->exclusive_vectors = false;
|
||||
vmci_dev->iobase = iobase;
|
||||
|
||||
tasklet_init(&vmci_dev->datagram_tasklet,
|
||||
vmci_dispatch_dgs, (unsigned long)vmci_dev);
|
||||
tasklet_init(&vmci_dev->bm_tasklet,
|
||||
vmci_process_bitmap, (unsigned long)vmci_dev);
|
||||
|
||||
vmci_dev->data_buffer = vmalloc(VMCI_MAX_DG_SIZE);
|
||||
if (!vmci_dev->data_buffer) {
|
||||
dev_err(&pdev->dev,
|
||||
"Can't allocate memory for datagram buffer\n");
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
pci_set_master(pdev); /* To enable queue_pair functionality. */
|
||||
|
||||
/*
|
||||
* Verify that the VMCI Device supports the capabilities that
|
||||
* we need. If the device is missing capabilities that we would
|
||||
* like to use, check for fallback capabilities and use those
|
||||
* instead (so we can run a new VM on old hosts). Fail the load if
|
||||
* a required capability is missing and there is no fallback.
|
||||
*
|
||||
* Right now, we need datagrams. There are no fallbacks.
|
||||
*/
|
||||
capabilities = ioread32(vmci_dev->iobase + VMCI_CAPS_ADDR);
|
||||
if (!(capabilities & VMCI_CAPS_DATAGRAM)) {
|
||||
dev_err(&pdev->dev, "Device does not support datagrams\n");
|
||||
error = -ENXIO;
|
||||
goto err_free_data_buffer;
|
||||
}
|
||||
|
||||
/*
|
||||
* If the hardware supports notifications, we will use that as
|
||||
* well.
|
||||
*/
|
||||
if (capabilities & VMCI_CAPS_NOTIFICATIONS) {
|
||||
vmci_dev->notification_bitmap = vmalloc(PAGE_SIZE);
|
||||
if (!vmci_dev->notification_bitmap) {
|
||||
dev_warn(&pdev->dev,
|
||||
"Unable to allocate notification bitmap\n");
|
||||
} else {
|
||||
memset(vmci_dev->notification_bitmap, 0, PAGE_SIZE);
|
||||
capabilities |= VMCI_CAPS_NOTIFICATIONS;
|
||||
}
|
||||
}
|
||||
|
||||
dev_info(&pdev->dev, "Using capabilities 0x%x\n", capabilities);
|
||||
|
||||
/* Let the host know which capabilities we intend to use. */
|
||||
iowrite32(capabilities, vmci_dev->iobase + VMCI_CAPS_ADDR);
|
||||
|
||||
/* Set up global device so that we can start sending datagrams */
|
||||
spin_lock_irq(&vmci_dev_spinlock);
|
||||
vmci_dev_g = vmci_dev;
|
||||
spin_unlock_irq(&vmci_dev_spinlock);
|
||||
|
||||
/*
|
||||
* Register notification bitmap with device if that capability is
|
||||
* used.
|
||||
*/
|
||||
if (capabilities & VMCI_CAPS_NOTIFICATIONS) {
|
||||
struct page *page =
|
||||
vmalloc_to_page(vmci_dev->notification_bitmap);
|
||||
unsigned long bitmap_ppn = page_to_pfn(page);
|
||||
if (!vmci_dbell_register_notification_bitmap(bitmap_ppn)) {
|
||||
dev_warn(&pdev->dev,
|
||||
"VMCI device unable to register notification bitmap with PPN 0x%x\n",
|
||||
(u32) bitmap_ppn);
|
||||
goto err_remove_vmci_dev_g;
|
||||
}
|
||||
}
|
||||
|
||||
/* Check host capabilities. */
|
||||
if (!vmci_check_host_caps(pdev))
|
||||
goto err_remove_bitmap;
|
||||
|
||||
/* Enable device. */
|
||||
|
||||
/*
|
||||
* We subscribe to the VMCI_EVENT_CTX_ID_UPDATE here so we can
|
||||
* update the internal context id when needed.
|
||||
*/
|
||||
vmci_err = vmci_event_subscribe(VMCI_EVENT_CTX_ID_UPDATE,
|
||||
vmci_guest_cid_update, NULL,
|
||||
&ctx_update_sub_id);
|
||||
if (vmci_err < VMCI_SUCCESS)
|
||||
dev_warn(&pdev->dev,
|
||||
"Failed to subscribe to event (type=%d): %d\n",
|
||||
VMCI_EVENT_CTX_ID_UPDATE, vmci_err);
|
||||
|
||||
/*
|
||||
* Enable interrupts. Try MSI-X first, then MSI, and then fallback on
|
||||
* legacy interrupts.
|
||||
*/
|
||||
if (!vmci_disable_msix && !vmci_enable_msix(pdev, vmci_dev)) {
|
||||
vmci_dev->intr_type = VMCI_INTR_TYPE_MSIX;
|
||||
vmci_dev->irq = vmci_dev->msix_entries[0].vector;
|
||||
} else if (!vmci_disable_msi && !pci_enable_msi(pdev)) {
|
||||
vmci_dev->intr_type = VMCI_INTR_TYPE_MSI;
|
||||
vmci_dev->irq = pdev->irq;
|
||||
} else {
|
||||
vmci_dev->intr_type = VMCI_INTR_TYPE_INTX;
|
||||
vmci_dev->irq = pdev->irq;
|
||||
}
|
||||
|
||||
/*
|
||||
* Request IRQ for legacy or MSI interrupts, or for first
|
||||
* MSI-X vector.
|
||||
*/
|
||||
error = request_irq(vmci_dev->irq, vmci_interrupt, IRQF_SHARED,
|
||||
KBUILD_MODNAME, vmci_dev);
|
||||
if (error) {
|
||||
dev_err(&pdev->dev, "Irq %u in use: %d\n",
|
||||
vmci_dev->irq, error);
|
||||
goto err_disable_msi;
|
||||
}
|
||||
|
||||
/*
|
||||
* For MSI-X with exclusive vectors we need to request an
|
||||
* interrupt for each vector so that we get a separate
|
||||
* interrupt handler routine. This allows us to distinguish
|
||||
* between the vectors.
|
||||
*/
|
||||
if (vmci_dev->exclusive_vectors) {
|
||||
error = request_irq(vmci_dev->msix_entries[1].vector,
|
||||
vmci_interrupt_bm, 0, KBUILD_MODNAME,
|
||||
vmci_dev);
|
||||
if (error) {
|
||||
dev_err(&pdev->dev,
|
||||
"Failed to allocate irq %u: %d\n",
|
||||
vmci_dev->msix_entries[1].vector, error);
|
||||
goto err_free_irq;
|
||||
}
|
||||
}
|
||||
|
||||
dev_dbg(&pdev->dev, "Registered device\n");
|
||||
|
||||
atomic_inc(&vmci_num_guest_devices);
|
||||
|
||||
/* Enable specific interrupt bits. */
|
||||
cmd = VMCI_IMR_DATAGRAM;
|
||||
if (capabilities & VMCI_CAPS_NOTIFICATIONS)
|
||||
cmd |= VMCI_IMR_NOTIFICATION;
|
||||
iowrite32(cmd, vmci_dev->iobase + VMCI_IMR_ADDR);
|
||||
|
||||
/* Enable interrupts. */
|
||||
iowrite32(VMCI_CONTROL_INT_ENABLE,
|
||||
vmci_dev->iobase + VMCI_CONTROL_ADDR);
|
||||
|
||||
pci_set_drvdata(pdev, vmci_dev);
|
||||
return 0;
|
||||
|
||||
err_free_irq:
|
||||
free_irq(vmci_dev->irq, &vmci_dev);
|
||||
tasklet_kill(&vmci_dev->datagram_tasklet);
|
||||
tasklet_kill(&vmci_dev->bm_tasklet);
|
||||
|
||||
err_disable_msi:
|
||||
if (vmci_dev->intr_type == VMCI_INTR_TYPE_MSIX)
|
||||
pci_disable_msix(pdev);
|
||||
else if (vmci_dev->intr_type == VMCI_INTR_TYPE_MSI)
|
||||
pci_disable_msi(pdev);
|
||||
|
||||
vmci_err = vmci_event_unsubscribe(ctx_update_sub_id);
|
||||
if (vmci_err < VMCI_SUCCESS)
|
||||
dev_warn(&pdev->dev,
|
||||
"Failed to unsubscribe from event (type=%d) with subscriber (ID=0x%x): %d\n",
|
||||
VMCI_EVENT_CTX_ID_UPDATE, ctx_update_sub_id, vmci_err);
|
||||
|
||||
err_remove_bitmap:
|
||||
if (vmci_dev->notification_bitmap) {
|
||||
iowrite32(VMCI_CONTROL_RESET,
|
||||
vmci_dev->iobase + VMCI_CONTROL_ADDR);
|
||||
vfree(vmci_dev->notification_bitmap);
|
||||
}
|
||||
|
||||
err_remove_vmci_dev_g:
|
||||
spin_lock_irq(&vmci_dev_spinlock);
|
||||
vmci_dev_g = NULL;
|
||||
spin_unlock_irq(&vmci_dev_spinlock);
|
||||
|
||||
err_free_data_buffer:
|
||||
vfree(vmci_dev->data_buffer);
|
||||
|
||||
/* The rest are managed resources and will be freed by PCI core */
|
||||
return error;
|
||||
}
|
||||
|
||||
static void vmci_guest_remove_device(struct pci_dev *pdev)
|
||||
{
|
||||
struct vmci_guest_device *vmci_dev = pci_get_drvdata(pdev);
|
||||
int vmci_err;
|
||||
|
||||
dev_dbg(&pdev->dev, "Removing device\n");
|
||||
|
||||
atomic_dec(&vmci_num_guest_devices);
|
||||
|
||||
vmci_qp_guest_endpoints_exit();
|
||||
|
||||
vmci_err = vmci_event_unsubscribe(ctx_update_sub_id);
|
||||
if (vmci_err < VMCI_SUCCESS)
|
||||
dev_warn(&pdev->dev,
|
||||
"Failed to unsubscribe from event (type=%d) with subscriber (ID=0x%x): %d\n",
|
||||
VMCI_EVENT_CTX_ID_UPDATE, ctx_update_sub_id, vmci_err);
|
||||
|
||||
spin_lock_irq(&vmci_dev_spinlock);
|
||||
vmci_dev_g = NULL;
|
||||
spin_unlock_irq(&vmci_dev_spinlock);
|
||||
|
||||
dev_dbg(&pdev->dev, "Resetting vmci device\n");
|
||||
iowrite32(VMCI_CONTROL_RESET, vmci_dev->iobase + VMCI_CONTROL_ADDR);
|
||||
|
||||
/*
|
||||
* Free IRQ and then disable MSI/MSI-X as appropriate. For
|
||||
* MSI-X, we might have multiple vectors, each with their own
|
||||
* IRQ, which we must free too.
|
||||
*/
|
||||
free_irq(vmci_dev->irq, vmci_dev);
|
||||
if (vmci_dev->intr_type == VMCI_INTR_TYPE_MSIX) {
|
||||
if (vmci_dev->exclusive_vectors)
|
||||
free_irq(vmci_dev->msix_entries[1].vector, vmci_dev);
|
||||
pci_disable_msix(pdev);
|
||||
} else if (vmci_dev->intr_type == VMCI_INTR_TYPE_MSI) {
|
||||
pci_disable_msi(pdev);
|
||||
}
|
||||
|
||||
tasklet_kill(&vmci_dev->datagram_tasklet);
|
||||
tasklet_kill(&vmci_dev->bm_tasklet);
|
||||
|
||||
if (vmci_dev->notification_bitmap) {
|
||||
/*
|
||||
* The device reset above cleared the bitmap state of the
|
||||
* device, so we can safely free it here.
|
||||
*/
|
||||
|
||||
vfree(vmci_dev->notification_bitmap);
|
||||
}
|
||||
|
||||
vfree(vmci_dev->data_buffer);
|
||||
|
||||
/* The rest are managed resources and will be freed by PCI core */
|
||||
}
|
||||
|
||||
static DEFINE_PCI_DEVICE_TABLE(vmci_ids) = {
|
||||
{ PCI_DEVICE(PCI_VENDOR_ID_VMWARE, PCI_DEVICE_ID_VMWARE_VMCI), },
|
||||
{ 0 },
|
||||
};
|
||||
MODULE_DEVICE_TABLE(pci, vmci_ids);
|
||||
|
||||
static struct pci_driver vmci_guest_driver = {
|
||||
.name = KBUILD_MODNAME,
|
||||
.id_table = vmci_ids,
|
||||
.probe = vmci_guest_probe_device,
|
||||
.remove = vmci_guest_remove_device,
|
||||
};
|
||||
|
||||
int __init vmci_guest_init(void)
|
||||
{
|
||||
return pci_register_driver(&vmci_guest_driver);
|
||||
}
|
||||
|
||||
void __exit vmci_guest_exit(void)
|
||||
{
|
||||
pci_unregister_driver(&vmci_guest_driver);
|
||||
}
|
Loading…
Reference in New Issue
Block a user