1685a6bf8SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 21f166439SGeorge Zhang /* 31f166439SGeorge Zhang * VMware VMCI Driver 41f166439SGeorge Zhang * 51f166439SGeorge Zhang * Copyright (C) 2012 VMware, Inc. All rights reserved. 61f166439SGeorge Zhang */ 71f166439SGeorge Zhang 81f166439SGeorge Zhang #include <linux/vmw_vmci_defs.h> 91f166439SGeorge Zhang #include <linux/vmw_vmci_api.h> 101f166439SGeorge Zhang #include <linux/moduleparam.h> 111f166439SGeorge Zhang #include <linux/interrupt.h> 121f166439SGeorge Zhang #include <linux/highmem.h> 131f166439SGeorge Zhang #include <linux/kernel.h> 14ea8a83a4SDmitry Torokhov #include <linux/mm.h> 151f166439SGeorge Zhang #include <linux/module.h> 161f166439SGeorge Zhang #include <linux/sched.h> 17ea8a83a4SDmitry Torokhov #include <linux/slab.h> 181f166439SGeorge Zhang #include <linux/init.h> 191f166439SGeorge Zhang #include <linux/pci.h> 201f166439SGeorge Zhang #include <linux/smp.h> 211f166439SGeorge Zhang #include <linux/io.h> 22ea8a83a4SDmitry Torokhov #include <linux/vmalloc.h> 231f166439SGeorge Zhang 241f166439SGeorge Zhang #include "vmci_datagram.h" 251f166439SGeorge Zhang #include "vmci_doorbell.h" 261f166439SGeorge Zhang #include "vmci_context.h" 271f166439SGeorge Zhang #include "vmci_driver.h" 281f166439SGeorge Zhang #include "vmci_event.h" 291f166439SGeorge Zhang 301f166439SGeorge Zhang #define PCI_DEVICE_ID_VMWARE_VMCI 0x0740 311f166439SGeorge Zhang 321f166439SGeorge Zhang #define VMCI_UTIL_NUM_RESOURCES 1 331f166439SGeorge Zhang 341f166439SGeorge Zhang static bool vmci_disable_msi; 351f166439SGeorge Zhang module_param_named(disable_msi, vmci_disable_msi, bool, 0); 361f166439SGeorge Zhang MODULE_PARM_DESC(disable_msi, "Disable MSI use in driver - (default=0)"); 371f166439SGeorge Zhang 381f166439SGeorge Zhang static bool vmci_disable_msix; 391f166439SGeorge Zhang module_param_named(disable_msix, vmci_disable_msix, bool, 0); 401f166439SGeorge Zhang MODULE_PARM_DESC(disable_msix, "Disable MSI-X use in driver - (default=0)"); 411f166439SGeorge Zhang 421f166439SGeorge Zhang static u32 ctx_update_sub_id = VMCI_INVALID_ID; 431f166439SGeorge Zhang static u32 vm_context_id = VMCI_INVALID_ID; 441f166439SGeorge Zhang 451f166439SGeorge Zhang struct vmci_guest_device { 461f166439SGeorge Zhang struct device *dev; /* PCI device we are attached to */ 471f166439SGeorge Zhang void __iomem *iobase; 481f166439SGeorge Zhang 491f166439SGeorge Zhang bool exclusive_vectors; 501f166439SGeorge Zhang 511f166439SGeorge Zhang struct tasklet_struct datagram_tasklet; 521f166439SGeorge Zhang struct tasklet_struct bm_tasklet; 531f166439SGeorge Zhang 541f166439SGeorge Zhang void *data_buffer; 551f166439SGeorge Zhang void *notification_bitmap; 566d6dfb4fSAndy King dma_addr_t notification_base; 571f166439SGeorge Zhang }; 581f166439SGeorge Zhang 59f2db7361SVishnu DASA static bool use_ppn64; 60f2db7361SVishnu DASA 61f2db7361SVishnu DASA bool vmci_use_ppn64(void) 62f2db7361SVishnu DASA { 63f2db7361SVishnu DASA return use_ppn64; 64f2db7361SVishnu DASA } 65f2db7361SVishnu DASA 661f166439SGeorge Zhang /* vmci_dev singleton device and supporting data*/ 676d6dfb4fSAndy King struct pci_dev *vmci_pdev; 681f166439SGeorge Zhang static struct vmci_guest_device *vmci_dev_g; 691f166439SGeorge Zhang static DEFINE_SPINLOCK(vmci_dev_spinlock); 701f166439SGeorge Zhang 711f166439SGeorge Zhang static atomic_t vmci_num_guest_devices = ATOMIC_INIT(0); 721f166439SGeorge Zhang 731f166439SGeorge Zhang bool vmci_guest_code_active(void) 741f166439SGeorge Zhang { 751f166439SGeorge Zhang return atomic_read(&vmci_num_guest_devices) != 0; 761f166439SGeorge Zhang } 771f166439SGeorge Zhang 781f166439SGeorge Zhang u32 vmci_get_vm_context_id(void) 791f166439SGeorge Zhang { 801f166439SGeorge Zhang if (vm_context_id == VMCI_INVALID_ID) { 811f166439SGeorge Zhang struct vmci_datagram get_cid_msg; 821f166439SGeorge Zhang get_cid_msg.dst = 831f166439SGeorge Zhang vmci_make_handle(VMCI_HYPERVISOR_CONTEXT_ID, 841f166439SGeorge Zhang VMCI_GET_CONTEXT_ID); 851f166439SGeorge Zhang get_cid_msg.src = VMCI_ANON_SRC_HANDLE; 861f166439SGeorge Zhang get_cid_msg.payload_size = 0; 875a19b789SAndy King vm_context_id = vmci_send_datagram(&get_cid_msg); 881f166439SGeorge Zhang } 891f166439SGeorge Zhang return vm_context_id; 901f166439SGeorge Zhang } 911f166439SGeorge Zhang 921f166439SGeorge Zhang /* 931f166439SGeorge Zhang * VM to hypervisor call mechanism. We use the standard VMware naming 941f166439SGeorge Zhang * convention since shared code is calling this function as well. 951f166439SGeorge Zhang */ 961f166439SGeorge Zhang int vmci_send_datagram(struct vmci_datagram *dg) 971f166439SGeorge Zhang { 981f166439SGeorge Zhang unsigned long flags; 991f166439SGeorge Zhang int result; 1001f166439SGeorge Zhang 1011f166439SGeorge Zhang /* Check args. */ 1021f166439SGeorge Zhang if (dg == NULL) 1031f166439SGeorge Zhang return VMCI_ERROR_INVALID_ARGS; 1041f166439SGeorge Zhang 1051f166439SGeorge Zhang /* 1061f166439SGeorge Zhang * Need to acquire spinlock on the device because the datagram 1071f166439SGeorge Zhang * data may be spread over multiple pages and the monitor may 1081f166439SGeorge Zhang * interleave device user rpc calls from multiple 1091f166439SGeorge Zhang * VCPUs. Acquiring the spinlock precludes that 1101f166439SGeorge Zhang * possibility. Disabling interrupts to avoid incoming 1111f166439SGeorge Zhang * datagrams during a "rep out" and possibly landing up in 1121f166439SGeorge Zhang * this function. 1131f166439SGeorge Zhang */ 1141f166439SGeorge Zhang spin_lock_irqsave(&vmci_dev_spinlock, flags); 1151f166439SGeorge Zhang 1161f166439SGeorge Zhang if (vmci_dev_g) { 1171f166439SGeorge Zhang iowrite8_rep(vmci_dev_g->iobase + VMCI_DATA_OUT_ADDR, 1181f166439SGeorge Zhang dg, VMCI_DG_SIZE(dg)); 1191f166439SGeorge Zhang result = ioread32(vmci_dev_g->iobase + VMCI_RESULT_LOW_ADDR); 1201f166439SGeorge Zhang } else { 1211f166439SGeorge Zhang result = VMCI_ERROR_UNAVAILABLE; 1221f166439SGeorge Zhang } 1231f166439SGeorge Zhang 1241f166439SGeorge Zhang spin_unlock_irqrestore(&vmci_dev_spinlock, flags); 1251f166439SGeorge Zhang 1261f166439SGeorge Zhang return result; 1271f166439SGeorge Zhang } 1281f166439SGeorge Zhang EXPORT_SYMBOL_GPL(vmci_send_datagram); 1291f166439SGeorge Zhang 1301f166439SGeorge Zhang /* 1311f166439SGeorge Zhang * Gets called with the new context id if updated or resumed. 1321f166439SGeorge Zhang * Context id. 1331f166439SGeorge Zhang */ 1341f166439SGeorge Zhang static void vmci_guest_cid_update(u32 sub_id, 1351f166439SGeorge Zhang const struct vmci_event_data *event_data, 1361f166439SGeorge Zhang void *client_data) 1371f166439SGeorge Zhang { 1381f166439SGeorge Zhang const struct vmci_event_payld_ctx *ev_payload = 1391f166439SGeorge Zhang vmci_event_data_const_payload(event_data); 1401f166439SGeorge Zhang 1411f166439SGeorge Zhang if (sub_id != ctx_update_sub_id) { 1421f166439SGeorge Zhang pr_devel("Invalid subscriber (ID=0x%x)\n", sub_id); 1431f166439SGeorge Zhang return; 1441f166439SGeorge Zhang } 1451f166439SGeorge Zhang 1461f166439SGeorge Zhang if (!event_data || ev_payload->context_id == VMCI_INVALID_ID) { 1471f166439SGeorge Zhang pr_devel("Invalid event data\n"); 1481f166439SGeorge Zhang return; 1491f166439SGeorge Zhang } 1501f166439SGeorge Zhang 1511f166439SGeorge Zhang pr_devel("Updating context from (ID=0x%x) to (ID=0x%x) on event (type=%d)\n", 1521f166439SGeorge Zhang vm_context_id, ev_payload->context_id, event_data->event); 1531f166439SGeorge Zhang 1541f166439SGeorge Zhang vm_context_id = ev_payload->context_id; 1551f166439SGeorge Zhang } 1561f166439SGeorge Zhang 1571f166439SGeorge Zhang /* 1581f166439SGeorge Zhang * Verify that the host supports the hypercalls we need. If it does not, 1591f166439SGeorge Zhang * try to find fallback hypercalls and use those instead. Returns 1601f166439SGeorge Zhang * true if required hypercalls (or fallback hypercalls) are 1611f166439SGeorge Zhang * supported by the host, false otherwise. 1621f166439SGeorge Zhang */ 163782f2445SDmitry Torokhov static int vmci_check_host_caps(struct pci_dev *pdev) 1641f166439SGeorge Zhang { 1651f166439SGeorge Zhang bool result; 1661f166439SGeorge Zhang struct vmci_resource_query_msg *msg; 1671f166439SGeorge Zhang u32 msg_size = sizeof(struct vmci_resource_query_hdr) + 1681f166439SGeorge Zhang VMCI_UTIL_NUM_RESOURCES * sizeof(u32); 1691f166439SGeorge Zhang struct vmci_datagram *check_msg; 1701f166439SGeorge Zhang 171*b2192cfeSTetsuo Handa check_msg = kzalloc(msg_size, GFP_KERNEL); 1721f166439SGeorge Zhang if (!check_msg) { 1731f166439SGeorge Zhang dev_err(&pdev->dev, "%s: Insufficient memory\n", __func__); 174782f2445SDmitry Torokhov return -ENOMEM; 1751f166439SGeorge Zhang } 1761f166439SGeorge Zhang 1771f166439SGeorge Zhang check_msg->dst = vmci_make_handle(VMCI_HYPERVISOR_CONTEXT_ID, 1781f166439SGeorge Zhang VMCI_RESOURCES_QUERY); 1791f166439SGeorge Zhang check_msg->src = VMCI_ANON_SRC_HANDLE; 1801f166439SGeorge Zhang check_msg->payload_size = msg_size - VMCI_DG_HEADERSIZE; 1811f166439SGeorge Zhang msg = (struct vmci_resource_query_msg *)VMCI_DG_PAYLOAD(check_msg); 1821f166439SGeorge Zhang 1831f166439SGeorge Zhang msg->num_resources = VMCI_UTIL_NUM_RESOURCES; 1841f166439SGeorge Zhang msg->resources[0] = VMCI_GET_CONTEXT_ID; 1851f166439SGeorge Zhang 1861f166439SGeorge Zhang /* Checks that hyper calls are supported */ 1871f166439SGeorge Zhang result = vmci_send_datagram(check_msg) == 0x01; 1881f166439SGeorge Zhang kfree(check_msg); 1891f166439SGeorge Zhang 1901f166439SGeorge Zhang dev_dbg(&pdev->dev, "%s: Host capability check: %s\n", 1911f166439SGeorge Zhang __func__, result ? "PASSED" : "FAILED"); 1921f166439SGeorge Zhang 1931f166439SGeorge Zhang /* We need the vector. There are no fallbacks. */ 194782f2445SDmitry Torokhov return result ? 0 : -ENXIO; 1951f166439SGeorge Zhang } 1961f166439SGeorge Zhang 1971f166439SGeorge Zhang /* 1981f166439SGeorge Zhang * Reads datagrams from the data in port and dispatches them. We 1991f166439SGeorge Zhang * always start reading datagrams into only the first page of the 2001f166439SGeorge Zhang * datagram buffer. If the datagrams don't fit into one page, we 2011f166439SGeorge Zhang * use the maximum datagram buffer size for the remainder of the 2021f166439SGeorge Zhang * invocation. This is a simple heuristic for not penalizing 2031f166439SGeorge Zhang * small datagrams. 2041f166439SGeorge Zhang * 2051f166439SGeorge Zhang * This function assumes that it has exclusive access to the data 2061f166439SGeorge Zhang * in port for the duration of the call. 2071f166439SGeorge Zhang */ 2081f166439SGeorge Zhang static void vmci_dispatch_dgs(unsigned long data) 2091f166439SGeorge Zhang { 2101f166439SGeorge Zhang struct vmci_guest_device *vmci_dev = (struct vmci_guest_device *)data; 2111f166439SGeorge Zhang u8 *dg_in_buffer = vmci_dev->data_buffer; 2121f166439SGeorge Zhang struct vmci_datagram *dg; 2131f166439SGeorge Zhang size_t dg_in_buffer_size = VMCI_MAX_DG_SIZE; 2141f166439SGeorge Zhang size_t current_dg_in_buffer_size = PAGE_SIZE; 2151f166439SGeorge Zhang size_t remaining_bytes; 2161f166439SGeorge Zhang 2171f166439SGeorge Zhang BUILD_BUG_ON(VMCI_MAX_DG_SIZE < PAGE_SIZE); 2181f166439SGeorge Zhang 2191f166439SGeorge Zhang ioread8_rep(vmci_dev->iobase + VMCI_DATA_IN_ADDR, 2201f166439SGeorge Zhang vmci_dev->data_buffer, current_dg_in_buffer_size); 2211f166439SGeorge Zhang dg = (struct vmci_datagram *)dg_in_buffer; 2221f166439SGeorge Zhang remaining_bytes = current_dg_in_buffer_size; 2231f166439SGeorge Zhang 2241f166439SGeorge Zhang while (dg->dst.resource != VMCI_INVALID_ID || 2251f166439SGeorge Zhang remaining_bytes > PAGE_SIZE) { 2261f166439SGeorge Zhang unsigned dg_in_size; 2271f166439SGeorge Zhang 2281f166439SGeorge Zhang /* 2291f166439SGeorge Zhang * When the input buffer spans multiple pages, a datagram can 2301f166439SGeorge Zhang * start on any page boundary in the buffer. 2311f166439SGeorge Zhang */ 2321f166439SGeorge Zhang if (dg->dst.resource == VMCI_INVALID_ID) { 2331f166439SGeorge Zhang dg = (struct vmci_datagram *)roundup( 2341f166439SGeorge Zhang (uintptr_t)dg + 1, PAGE_SIZE); 2351f166439SGeorge Zhang remaining_bytes = 2361f166439SGeorge Zhang (size_t)(dg_in_buffer + 2371f166439SGeorge Zhang current_dg_in_buffer_size - 2381f166439SGeorge Zhang (u8 *)dg); 2391f166439SGeorge Zhang continue; 2401f166439SGeorge Zhang } 2411f166439SGeorge Zhang 2421f166439SGeorge Zhang dg_in_size = VMCI_DG_SIZE_ALIGNED(dg); 2431f166439SGeorge Zhang 2441f166439SGeorge Zhang if (dg_in_size <= dg_in_buffer_size) { 2451f166439SGeorge Zhang int result; 2461f166439SGeorge Zhang 2471f166439SGeorge Zhang /* 2481f166439SGeorge Zhang * If the remaining bytes in the datagram 2491f166439SGeorge Zhang * buffer doesn't contain the complete 2501f166439SGeorge Zhang * datagram, we first make sure we have enough 2511f166439SGeorge Zhang * room for it and then we read the reminder 2521f166439SGeorge Zhang * of the datagram and possibly any following 2531f166439SGeorge Zhang * datagrams. 2541f166439SGeorge Zhang */ 2551f166439SGeorge Zhang if (dg_in_size > remaining_bytes) { 2561f166439SGeorge Zhang if (remaining_bytes != 2571f166439SGeorge Zhang current_dg_in_buffer_size) { 2581f166439SGeorge Zhang 2591f166439SGeorge Zhang /* 2601f166439SGeorge Zhang * We move the partial 2611f166439SGeorge Zhang * datagram to the front and 2621f166439SGeorge Zhang * read the reminder of the 2631f166439SGeorge Zhang * datagram and possibly 2641f166439SGeorge Zhang * following calls into the 2651f166439SGeorge Zhang * following bytes. 2661f166439SGeorge Zhang */ 2671f166439SGeorge Zhang memmove(dg_in_buffer, dg_in_buffer + 2681f166439SGeorge Zhang current_dg_in_buffer_size - 2691f166439SGeorge Zhang remaining_bytes, 2701f166439SGeorge Zhang remaining_bytes); 2711f166439SGeorge Zhang dg = (struct vmci_datagram *) 2721f166439SGeorge Zhang dg_in_buffer; 2731f166439SGeorge Zhang } 2741f166439SGeorge Zhang 2751f166439SGeorge Zhang if (current_dg_in_buffer_size != 2761f166439SGeorge Zhang dg_in_buffer_size) 2771f166439SGeorge Zhang current_dg_in_buffer_size = 2781f166439SGeorge Zhang dg_in_buffer_size; 2791f166439SGeorge Zhang 2801f166439SGeorge Zhang ioread8_rep(vmci_dev->iobase + 2811f166439SGeorge Zhang VMCI_DATA_IN_ADDR, 2821f166439SGeorge Zhang vmci_dev->data_buffer + 2831f166439SGeorge Zhang remaining_bytes, 2841f166439SGeorge Zhang current_dg_in_buffer_size - 2851f166439SGeorge Zhang remaining_bytes); 2861f166439SGeorge Zhang } 2871f166439SGeorge Zhang 2881f166439SGeorge Zhang /* 2891f166439SGeorge Zhang * We special case event datagrams from the 2901f166439SGeorge Zhang * hypervisor. 2911f166439SGeorge Zhang */ 2921f166439SGeorge Zhang if (dg->src.context == VMCI_HYPERVISOR_CONTEXT_ID && 2931f166439SGeorge Zhang dg->dst.resource == VMCI_EVENT_HANDLER) { 2941f166439SGeorge Zhang result = vmci_event_dispatch(dg); 2951f166439SGeorge Zhang } else { 2961f166439SGeorge Zhang result = vmci_datagram_invoke_guest_handler(dg); 2971f166439SGeorge Zhang } 2981f166439SGeorge Zhang if (result < VMCI_SUCCESS) 2991f166439SGeorge Zhang dev_dbg(vmci_dev->dev, 3001f166439SGeorge Zhang "Datagram with resource (ID=0x%x) failed (err=%d)\n", 3011f166439SGeorge Zhang dg->dst.resource, result); 3021f166439SGeorge Zhang 3031f166439SGeorge Zhang /* On to the next datagram. */ 3041f166439SGeorge Zhang dg = (struct vmci_datagram *)((u8 *)dg + 3051f166439SGeorge Zhang dg_in_size); 3061f166439SGeorge Zhang } else { 3071f166439SGeorge Zhang size_t bytes_to_skip; 3081f166439SGeorge Zhang 3091f166439SGeorge Zhang /* 3101f166439SGeorge Zhang * Datagram doesn't fit in datagram buffer of maximal 3111f166439SGeorge Zhang * size. We drop it. 3121f166439SGeorge Zhang */ 3131f166439SGeorge Zhang dev_dbg(vmci_dev->dev, 3141f166439SGeorge Zhang "Failed to receive datagram (size=%u bytes)\n", 3151f166439SGeorge Zhang dg_in_size); 3161f166439SGeorge Zhang 3171f166439SGeorge Zhang bytes_to_skip = dg_in_size - remaining_bytes; 3181f166439SGeorge Zhang if (current_dg_in_buffer_size != dg_in_buffer_size) 3191f166439SGeorge Zhang current_dg_in_buffer_size = dg_in_buffer_size; 3201f166439SGeorge Zhang 3211f166439SGeorge Zhang for (;;) { 3221f166439SGeorge Zhang ioread8_rep(vmci_dev->iobase + 3231f166439SGeorge Zhang VMCI_DATA_IN_ADDR, 3241f166439SGeorge Zhang vmci_dev->data_buffer, 3251f166439SGeorge Zhang current_dg_in_buffer_size); 3261f166439SGeorge Zhang if (bytes_to_skip <= current_dg_in_buffer_size) 3271f166439SGeorge Zhang break; 3281f166439SGeorge Zhang 3291f166439SGeorge Zhang bytes_to_skip -= current_dg_in_buffer_size; 3301f166439SGeorge Zhang } 3311f166439SGeorge Zhang dg = (struct vmci_datagram *)(dg_in_buffer + 3321f166439SGeorge Zhang bytes_to_skip); 3331f166439SGeorge Zhang } 3341f166439SGeorge Zhang 3351f166439SGeorge Zhang remaining_bytes = 3361f166439SGeorge Zhang (size_t) (dg_in_buffer + current_dg_in_buffer_size - 3371f166439SGeorge Zhang (u8 *)dg); 3381f166439SGeorge Zhang 3391f166439SGeorge Zhang if (remaining_bytes < VMCI_DG_HEADERSIZE) { 3401f166439SGeorge Zhang /* Get the next batch of datagrams. */ 3411f166439SGeorge Zhang 3421f166439SGeorge Zhang ioread8_rep(vmci_dev->iobase + VMCI_DATA_IN_ADDR, 3431f166439SGeorge Zhang vmci_dev->data_buffer, 3441f166439SGeorge Zhang current_dg_in_buffer_size); 3451f166439SGeorge Zhang dg = (struct vmci_datagram *)dg_in_buffer; 3461f166439SGeorge Zhang remaining_bytes = current_dg_in_buffer_size; 3471f166439SGeorge Zhang } 3481f166439SGeorge Zhang } 3491f166439SGeorge Zhang } 3501f166439SGeorge Zhang 3511f166439SGeorge Zhang /* 3521f166439SGeorge Zhang * Scans the notification bitmap for raised flags, clears them 3531f166439SGeorge Zhang * and handles the notifications. 3541f166439SGeorge Zhang */ 3551f166439SGeorge Zhang static void vmci_process_bitmap(unsigned long data) 3561f166439SGeorge Zhang { 3571f166439SGeorge Zhang struct vmci_guest_device *dev = (struct vmci_guest_device *)data; 3581f166439SGeorge Zhang 3591f166439SGeorge Zhang if (!dev->notification_bitmap) { 3601f166439SGeorge Zhang dev_dbg(dev->dev, "No bitmap present in %s\n", __func__); 3611f166439SGeorge Zhang return; 3621f166439SGeorge Zhang } 3631f166439SGeorge Zhang 3641f166439SGeorge Zhang vmci_dbell_scan_notification_entries(dev->notification_bitmap); 3651f166439SGeorge Zhang } 3661f166439SGeorge Zhang 3671f166439SGeorge Zhang /* 3681f166439SGeorge Zhang * Interrupt handler for legacy or MSI interrupt, or for first MSI-X 3691f166439SGeorge Zhang * interrupt (vector VMCI_INTR_DATAGRAM). 3701f166439SGeorge Zhang */ 3711f166439SGeorge Zhang static irqreturn_t vmci_interrupt(int irq, void *_dev) 3721f166439SGeorge Zhang { 3731f166439SGeorge Zhang struct vmci_guest_device *dev = _dev; 3741f166439SGeorge Zhang 3751f166439SGeorge Zhang /* 3761f166439SGeorge Zhang * If we are using MSI-X with exclusive vectors then we simply schedule 3771f166439SGeorge Zhang * the datagram tasklet, since we know the interrupt was meant for us. 3781f166439SGeorge Zhang * Otherwise we must read the ICR to determine what to do. 3791f166439SGeorge Zhang */ 3801f166439SGeorge Zhang 3813bb434cdSChristoph Hellwig if (dev->exclusive_vectors) { 3821f166439SGeorge Zhang tasklet_schedule(&dev->datagram_tasklet); 3831f166439SGeorge Zhang } else { 3841f166439SGeorge Zhang unsigned int icr; 3851f166439SGeorge Zhang 3861f166439SGeorge Zhang /* Acknowledge interrupt and determine what needs doing. */ 3871f166439SGeorge Zhang icr = ioread32(dev->iobase + VMCI_ICR_ADDR); 3881f166439SGeorge Zhang if (icr == 0 || icr == ~0) 3891f166439SGeorge Zhang return IRQ_NONE; 3901f166439SGeorge Zhang 3911f166439SGeorge Zhang if (icr & VMCI_ICR_DATAGRAM) { 3921f166439SGeorge Zhang tasklet_schedule(&dev->datagram_tasklet); 3931f166439SGeorge Zhang icr &= ~VMCI_ICR_DATAGRAM; 3941f166439SGeorge Zhang } 3951f166439SGeorge Zhang 3961f166439SGeorge Zhang if (icr & VMCI_ICR_NOTIFICATION) { 3971f166439SGeorge Zhang tasklet_schedule(&dev->bm_tasklet); 3981f166439SGeorge Zhang icr &= ~VMCI_ICR_NOTIFICATION; 3991f166439SGeorge Zhang } 4001f166439SGeorge Zhang 4011f166439SGeorge Zhang if (icr != 0) 4021f166439SGeorge Zhang dev_warn(dev->dev, 4031f166439SGeorge Zhang "Ignoring unknown interrupt cause (%d)\n", 4041f166439SGeorge Zhang icr); 4051f166439SGeorge Zhang } 4061f166439SGeorge Zhang 4071f166439SGeorge Zhang return IRQ_HANDLED; 4081f166439SGeorge Zhang } 4091f166439SGeorge Zhang 4101f166439SGeorge Zhang /* 4111f166439SGeorge Zhang * Interrupt handler for MSI-X interrupt vector VMCI_INTR_NOTIFICATION, 4121f166439SGeorge Zhang * which is for the notification bitmap. Will only get called if we are 4131f166439SGeorge Zhang * using MSI-X with exclusive vectors. 4141f166439SGeorge Zhang */ 4151f166439SGeorge Zhang static irqreturn_t vmci_interrupt_bm(int irq, void *_dev) 4161f166439SGeorge Zhang { 4171f166439SGeorge Zhang struct vmci_guest_device *dev = _dev; 4181f166439SGeorge Zhang 4191f166439SGeorge Zhang /* For MSI-X we can just assume it was meant for us. */ 4201f166439SGeorge Zhang tasklet_schedule(&dev->bm_tasklet); 4211f166439SGeorge Zhang 4221f166439SGeorge Zhang return IRQ_HANDLED; 4231f166439SGeorge Zhang } 4241f166439SGeorge Zhang 4251f166439SGeorge Zhang /* 4261f166439SGeorge Zhang * Most of the initialization at module load time is done here. 4271f166439SGeorge Zhang */ 4281f166439SGeorge Zhang static int vmci_guest_probe_device(struct pci_dev *pdev, 4291f166439SGeorge Zhang const struct pci_device_id *id) 4301f166439SGeorge Zhang { 4311f166439SGeorge Zhang struct vmci_guest_device *vmci_dev; 4321f166439SGeorge Zhang void __iomem *iobase; 4331f166439SGeorge Zhang unsigned int capabilities; 434f2db7361SVishnu DASA unsigned int caps_in_use; 4351f166439SGeorge Zhang unsigned long cmd; 4361f166439SGeorge Zhang int vmci_err; 4371f166439SGeorge Zhang int error; 4381f166439SGeorge Zhang 4391f166439SGeorge Zhang dev_dbg(&pdev->dev, "Probing for vmci/PCI guest device\n"); 4401f166439SGeorge Zhang 4411f166439SGeorge Zhang error = pcim_enable_device(pdev); 4421f166439SGeorge Zhang if (error) { 4431f166439SGeorge Zhang dev_err(&pdev->dev, 4441f166439SGeorge Zhang "Failed to enable VMCI device: %d\n", error); 4451f166439SGeorge Zhang return error; 4461f166439SGeorge Zhang } 4471f166439SGeorge Zhang 4481f166439SGeorge Zhang error = pcim_iomap_regions(pdev, 1 << 0, KBUILD_MODNAME); 4491f166439SGeorge Zhang if (error) { 4501f166439SGeorge Zhang dev_err(&pdev->dev, "Failed to reserve/map IO regions\n"); 4511f166439SGeorge Zhang return error; 4521f166439SGeorge Zhang } 4531f166439SGeorge Zhang 4541f166439SGeorge Zhang iobase = pcim_iomap_table(pdev)[0]; 4551f166439SGeorge Zhang 4561f166439SGeorge Zhang dev_info(&pdev->dev, "Found VMCI PCI device at %#lx, irq %u\n", 4571f166439SGeorge Zhang (unsigned long)iobase, pdev->irq); 4581f166439SGeorge Zhang 4591f166439SGeorge Zhang vmci_dev = devm_kzalloc(&pdev->dev, sizeof(*vmci_dev), GFP_KERNEL); 4601f166439SGeorge Zhang if (!vmci_dev) { 4611f166439SGeorge Zhang dev_err(&pdev->dev, 4621f166439SGeorge Zhang "Can't allocate memory for VMCI device\n"); 4631f166439SGeorge Zhang return -ENOMEM; 4641f166439SGeorge Zhang } 4651f166439SGeorge Zhang 4661f166439SGeorge Zhang vmci_dev->dev = &pdev->dev; 4671f166439SGeorge Zhang vmci_dev->exclusive_vectors = false; 4681f166439SGeorge Zhang vmci_dev->iobase = iobase; 4691f166439SGeorge Zhang 4701f166439SGeorge Zhang tasklet_init(&vmci_dev->datagram_tasklet, 4711f166439SGeorge Zhang vmci_dispatch_dgs, (unsigned long)vmci_dev); 4721f166439SGeorge Zhang tasklet_init(&vmci_dev->bm_tasklet, 4731f166439SGeorge Zhang vmci_process_bitmap, (unsigned long)vmci_dev); 4741f166439SGeorge Zhang 4751f166439SGeorge Zhang vmci_dev->data_buffer = vmalloc(VMCI_MAX_DG_SIZE); 4761f166439SGeorge Zhang if (!vmci_dev->data_buffer) { 4771f166439SGeorge Zhang dev_err(&pdev->dev, 4781f166439SGeorge Zhang "Can't allocate memory for datagram buffer\n"); 4791f166439SGeorge Zhang return -ENOMEM; 4801f166439SGeorge Zhang } 4811f166439SGeorge Zhang 4821f166439SGeorge Zhang pci_set_master(pdev); /* To enable queue_pair functionality. */ 4831f166439SGeorge Zhang 4841f166439SGeorge Zhang /* 4851f166439SGeorge Zhang * Verify that the VMCI Device supports the capabilities that 4861f166439SGeorge Zhang * we need. If the device is missing capabilities that we would 4871f166439SGeorge Zhang * like to use, check for fallback capabilities and use those 4881f166439SGeorge Zhang * instead (so we can run a new VM on old hosts). Fail the load if 4891f166439SGeorge Zhang * a required capability is missing and there is no fallback. 4901f166439SGeorge Zhang * 4911f166439SGeorge Zhang * Right now, we need datagrams. There are no fallbacks. 4921f166439SGeorge Zhang */ 4931f166439SGeorge Zhang capabilities = ioread32(vmci_dev->iobase + VMCI_CAPS_ADDR); 4941f166439SGeorge Zhang if (!(capabilities & VMCI_CAPS_DATAGRAM)) { 4951f166439SGeorge Zhang dev_err(&pdev->dev, "Device does not support datagrams\n"); 4961f166439SGeorge Zhang error = -ENXIO; 4971f166439SGeorge Zhang goto err_free_data_buffer; 4981f166439SGeorge Zhang } 499f2db7361SVishnu DASA caps_in_use = VMCI_CAPS_DATAGRAM; 500f2db7361SVishnu DASA 501f2db7361SVishnu DASA /* 502f2db7361SVishnu DASA * Use 64-bit PPNs if the device supports. 503f2db7361SVishnu DASA * 504f2db7361SVishnu DASA * There is no check for the return value of dma_set_mask_and_coherent 505f2db7361SVishnu DASA * since this driver can handle the default mask values if 506f2db7361SVishnu DASA * dma_set_mask_and_coherent fails. 507f2db7361SVishnu DASA */ 508f2db7361SVishnu DASA if (capabilities & VMCI_CAPS_PPN64) { 509f2db7361SVishnu DASA dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); 510f2db7361SVishnu DASA use_ppn64 = true; 511f2db7361SVishnu DASA caps_in_use |= VMCI_CAPS_PPN64; 512f2db7361SVishnu DASA } else { 513f2db7361SVishnu DASA dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(44)); 514f2db7361SVishnu DASA use_ppn64 = false; 515f2db7361SVishnu DASA } 5161f166439SGeorge Zhang 5171f166439SGeorge Zhang /* 5181f166439SGeorge Zhang * If the hardware supports notifications, we will use that as 5191f166439SGeorge Zhang * well. 5201f166439SGeorge Zhang */ 5211f166439SGeorge Zhang if (capabilities & VMCI_CAPS_NOTIFICATIONS) { 5226d6dfb4fSAndy King vmci_dev->notification_bitmap = dma_alloc_coherent( 5236d6dfb4fSAndy King &pdev->dev, PAGE_SIZE, &vmci_dev->notification_base, 5246d6dfb4fSAndy King GFP_KERNEL); 5251f166439SGeorge Zhang if (!vmci_dev->notification_bitmap) { 5261f166439SGeorge Zhang dev_warn(&pdev->dev, 5271f166439SGeorge Zhang "Unable to allocate notification bitmap\n"); 5281f166439SGeorge Zhang } else { 5291f166439SGeorge Zhang memset(vmci_dev->notification_bitmap, 0, PAGE_SIZE); 530f2db7361SVishnu DASA caps_in_use |= VMCI_CAPS_NOTIFICATIONS; 5311f166439SGeorge Zhang } 5321f166439SGeorge Zhang } 5331f166439SGeorge Zhang 534f2db7361SVishnu DASA dev_info(&pdev->dev, "Using capabilities 0x%x\n", caps_in_use); 5351f166439SGeorge Zhang 5361f166439SGeorge Zhang /* Let the host know which capabilities we intend to use. */ 537f2db7361SVishnu DASA iowrite32(caps_in_use, vmci_dev->iobase + VMCI_CAPS_ADDR); 5381f166439SGeorge Zhang 5391f166439SGeorge Zhang /* Set up global device so that we can start sending datagrams */ 5401f166439SGeorge Zhang spin_lock_irq(&vmci_dev_spinlock); 5411f166439SGeorge Zhang vmci_dev_g = vmci_dev; 5426d6dfb4fSAndy King vmci_pdev = pdev; 5431f166439SGeorge Zhang spin_unlock_irq(&vmci_dev_spinlock); 5441f166439SGeorge Zhang 5451f166439SGeorge Zhang /* 5461f166439SGeorge Zhang * Register notification bitmap with device if that capability is 5471f166439SGeorge Zhang * used. 5481f166439SGeorge Zhang */ 549f2db7361SVishnu DASA if (caps_in_use & VMCI_CAPS_NOTIFICATIONS) { 5506d6dfb4fSAndy King unsigned long bitmap_ppn = 5516d6dfb4fSAndy King vmci_dev->notification_base >> PAGE_SHIFT; 5521f166439SGeorge Zhang if (!vmci_dbell_register_notification_bitmap(bitmap_ppn)) { 5531f166439SGeorge Zhang dev_warn(&pdev->dev, 554f2db7361SVishnu DASA "VMCI device unable to register notification bitmap with PPN 0x%lx\n", 555f2db7361SVishnu DASA bitmap_ppn); 556782f2445SDmitry Torokhov error = -ENXIO; 5571f166439SGeorge Zhang goto err_remove_vmci_dev_g; 5581f166439SGeorge Zhang } 5591f166439SGeorge Zhang } 5601f166439SGeorge Zhang 5611f166439SGeorge Zhang /* Check host capabilities. */ 562782f2445SDmitry Torokhov error = vmci_check_host_caps(pdev); 563782f2445SDmitry Torokhov if (error) 5641f166439SGeorge Zhang goto err_remove_bitmap; 5651f166439SGeorge Zhang 5661f166439SGeorge Zhang /* Enable device. */ 5671f166439SGeorge Zhang 5681f166439SGeorge Zhang /* 5691f166439SGeorge Zhang * We subscribe to the VMCI_EVENT_CTX_ID_UPDATE here so we can 5701f166439SGeorge Zhang * update the internal context id when needed. 5711f166439SGeorge Zhang */ 5721f166439SGeorge Zhang vmci_err = vmci_event_subscribe(VMCI_EVENT_CTX_ID_UPDATE, 5731f166439SGeorge Zhang vmci_guest_cid_update, NULL, 5741f166439SGeorge Zhang &ctx_update_sub_id); 5751f166439SGeorge Zhang if (vmci_err < VMCI_SUCCESS) 5761f166439SGeorge Zhang dev_warn(&pdev->dev, 5771f166439SGeorge Zhang "Failed to subscribe to event (type=%d): %d\n", 5781f166439SGeorge Zhang VMCI_EVENT_CTX_ID_UPDATE, vmci_err); 5791f166439SGeorge Zhang 5801f166439SGeorge Zhang /* 5811f166439SGeorge Zhang * Enable interrupts. Try MSI-X first, then MSI, and then fallback on 5821f166439SGeorge Zhang * legacy interrupts. 5831f166439SGeorge Zhang */ 5843bb434cdSChristoph Hellwig error = pci_alloc_irq_vectors(pdev, VMCI_MAX_INTRS, VMCI_MAX_INTRS, 5853bb434cdSChristoph Hellwig PCI_IRQ_MSIX); 586c3423563SChristoph Hellwig if (error < 0) { 5873bb434cdSChristoph Hellwig error = pci_alloc_irq_vectors(pdev, 1, 1, 5883bb434cdSChristoph Hellwig PCI_IRQ_MSIX | PCI_IRQ_MSI | PCI_IRQ_LEGACY); 589c3423563SChristoph Hellwig if (error < 0) 5903bb434cdSChristoph Hellwig goto err_remove_bitmap; 5911f166439SGeorge Zhang } else { 5923bb434cdSChristoph Hellwig vmci_dev->exclusive_vectors = true; 5931f166439SGeorge Zhang } 5941f166439SGeorge Zhang 5951f166439SGeorge Zhang /* 5961f166439SGeorge Zhang * Request IRQ for legacy or MSI interrupts, or for first 5971f166439SGeorge Zhang * MSI-X vector. 5981f166439SGeorge Zhang */ 5993bb434cdSChristoph Hellwig error = request_irq(pci_irq_vector(pdev, 0), vmci_interrupt, 6003bb434cdSChristoph Hellwig IRQF_SHARED, KBUILD_MODNAME, vmci_dev); 6011f166439SGeorge Zhang if (error) { 6021f166439SGeorge Zhang dev_err(&pdev->dev, "Irq %u in use: %d\n", 6033bb434cdSChristoph Hellwig pci_irq_vector(pdev, 0), error); 6041f166439SGeorge Zhang goto err_disable_msi; 6051f166439SGeorge Zhang } 6061f166439SGeorge Zhang 6071f166439SGeorge Zhang /* 6081f166439SGeorge Zhang * For MSI-X with exclusive vectors we need to request an 6091f166439SGeorge Zhang * interrupt for each vector so that we get a separate 6101f166439SGeorge Zhang * interrupt handler routine. This allows us to distinguish 6111f166439SGeorge Zhang * between the vectors. 6121f166439SGeorge Zhang */ 6131f166439SGeorge Zhang if (vmci_dev->exclusive_vectors) { 6143bb434cdSChristoph Hellwig error = request_irq(pci_irq_vector(pdev, 1), 6151f166439SGeorge Zhang vmci_interrupt_bm, 0, KBUILD_MODNAME, 6161f166439SGeorge Zhang vmci_dev); 6171f166439SGeorge Zhang if (error) { 6181f166439SGeorge Zhang dev_err(&pdev->dev, 6191f166439SGeorge Zhang "Failed to allocate irq %u: %d\n", 6203bb434cdSChristoph Hellwig pci_irq_vector(pdev, 1), error); 6211f166439SGeorge Zhang goto err_free_irq; 6221f166439SGeorge Zhang } 6231f166439SGeorge Zhang } 6241f166439SGeorge Zhang 6251f166439SGeorge Zhang dev_dbg(&pdev->dev, "Registered device\n"); 6261f166439SGeorge Zhang 6271f166439SGeorge Zhang atomic_inc(&vmci_num_guest_devices); 6281f166439SGeorge Zhang 6291f166439SGeorge Zhang /* Enable specific interrupt bits. */ 6301f166439SGeorge Zhang cmd = VMCI_IMR_DATAGRAM; 631f2db7361SVishnu DASA if (caps_in_use & VMCI_CAPS_NOTIFICATIONS) 6321f166439SGeorge Zhang cmd |= VMCI_IMR_NOTIFICATION; 6331f166439SGeorge Zhang iowrite32(cmd, vmci_dev->iobase + VMCI_IMR_ADDR); 6341f166439SGeorge Zhang 6351f166439SGeorge Zhang /* Enable interrupts. */ 6361f166439SGeorge Zhang iowrite32(VMCI_CONTROL_INT_ENABLE, 6371f166439SGeorge Zhang vmci_dev->iobase + VMCI_CONTROL_ADDR); 6381f166439SGeorge Zhang 6391f166439SGeorge Zhang pci_set_drvdata(pdev, vmci_dev); 640b1bba80aSStefano Garzarella 641b1bba80aSStefano Garzarella vmci_call_vsock_callback(false); 6421f166439SGeorge Zhang return 0; 6431f166439SGeorge Zhang 6441f166439SGeorge Zhang err_free_irq: 6453bb434cdSChristoph Hellwig free_irq(pci_irq_vector(pdev, 0), vmci_dev); 6461f166439SGeorge Zhang tasklet_kill(&vmci_dev->datagram_tasklet); 6471f166439SGeorge Zhang tasklet_kill(&vmci_dev->bm_tasklet); 6481f166439SGeorge Zhang 6491f166439SGeorge Zhang err_disable_msi: 6503bb434cdSChristoph Hellwig pci_free_irq_vectors(pdev); 6511f166439SGeorge Zhang 6521f166439SGeorge Zhang vmci_err = vmci_event_unsubscribe(ctx_update_sub_id); 6531f166439SGeorge Zhang if (vmci_err < VMCI_SUCCESS) 6541f166439SGeorge Zhang dev_warn(&pdev->dev, 6551f166439SGeorge Zhang "Failed to unsubscribe from event (type=%d) with subscriber (ID=0x%x): %d\n", 6561f166439SGeorge Zhang VMCI_EVENT_CTX_ID_UPDATE, ctx_update_sub_id, vmci_err); 6571f166439SGeorge Zhang 6581f166439SGeorge Zhang err_remove_bitmap: 6591f166439SGeorge Zhang if (vmci_dev->notification_bitmap) { 6601f166439SGeorge Zhang iowrite32(VMCI_CONTROL_RESET, 6611f166439SGeorge Zhang vmci_dev->iobase + VMCI_CONTROL_ADDR); 6626d6dfb4fSAndy King dma_free_coherent(&pdev->dev, PAGE_SIZE, 6636d6dfb4fSAndy King vmci_dev->notification_bitmap, 6646d6dfb4fSAndy King vmci_dev->notification_base); 6651f166439SGeorge Zhang } 6661f166439SGeorge Zhang 6671f166439SGeorge Zhang err_remove_vmci_dev_g: 6681f166439SGeorge Zhang spin_lock_irq(&vmci_dev_spinlock); 6696d6dfb4fSAndy King vmci_pdev = NULL; 6701f166439SGeorge Zhang vmci_dev_g = NULL; 6711f166439SGeorge Zhang spin_unlock_irq(&vmci_dev_spinlock); 6721f166439SGeorge Zhang 6731f166439SGeorge Zhang err_free_data_buffer: 6741f166439SGeorge Zhang vfree(vmci_dev->data_buffer); 6751f166439SGeorge Zhang 6761f166439SGeorge Zhang /* The rest are managed resources and will be freed by PCI core */ 6771f166439SGeorge Zhang return error; 6781f166439SGeorge Zhang } 6791f166439SGeorge Zhang 6801f166439SGeorge Zhang static void vmci_guest_remove_device(struct pci_dev *pdev) 6811f166439SGeorge Zhang { 6821f166439SGeorge Zhang struct vmci_guest_device *vmci_dev = pci_get_drvdata(pdev); 6831f166439SGeorge Zhang int vmci_err; 6841f166439SGeorge Zhang 6851f166439SGeorge Zhang dev_dbg(&pdev->dev, "Removing device\n"); 6861f166439SGeorge Zhang 6871f166439SGeorge Zhang atomic_dec(&vmci_num_guest_devices); 6881f166439SGeorge Zhang 6891f166439SGeorge Zhang vmci_qp_guest_endpoints_exit(); 6901f166439SGeorge Zhang 6911f166439SGeorge Zhang vmci_err = vmci_event_unsubscribe(ctx_update_sub_id); 6921f166439SGeorge Zhang if (vmci_err < VMCI_SUCCESS) 6931f166439SGeorge Zhang dev_warn(&pdev->dev, 6941f166439SGeorge Zhang "Failed to unsubscribe from event (type=%d) with subscriber (ID=0x%x): %d\n", 6951f166439SGeorge Zhang VMCI_EVENT_CTX_ID_UPDATE, ctx_update_sub_id, vmci_err); 6961f166439SGeorge Zhang 6971f166439SGeorge Zhang spin_lock_irq(&vmci_dev_spinlock); 6981f166439SGeorge Zhang vmci_dev_g = NULL; 6996d6dfb4fSAndy King vmci_pdev = NULL; 7001f166439SGeorge Zhang spin_unlock_irq(&vmci_dev_spinlock); 7011f166439SGeorge Zhang 7021f166439SGeorge Zhang dev_dbg(&pdev->dev, "Resetting vmci device\n"); 7031f166439SGeorge Zhang iowrite32(VMCI_CONTROL_RESET, vmci_dev->iobase + VMCI_CONTROL_ADDR); 7041f166439SGeorge Zhang 7051f166439SGeorge Zhang /* 7061f166439SGeorge Zhang * Free IRQ and then disable MSI/MSI-X as appropriate. For 7071f166439SGeorge Zhang * MSI-X, we might have multiple vectors, each with their own 7081f166439SGeorge Zhang * IRQ, which we must free too. 7091f166439SGeorge Zhang */ 7101f166439SGeorge Zhang if (vmci_dev->exclusive_vectors) 7113bb434cdSChristoph Hellwig free_irq(pci_irq_vector(pdev, 1), vmci_dev); 7123bb434cdSChristoph Hellwig free_irq(pci_irq_vector(pdev, 0), vmci_dev); 7133bb434cdSChristoph Hellwig pci_free_irq_vectors(pdev); 7141f166439SGeorge Zhang 7151f166439SGeorge Zhang tasklet_kill(&vmci_dev->datagram_tasklet); 7161f166439SGeorge Zhang tasklet_kill(&vmci_dev->bm_tasklet); 7171f166439SGeorge Zhang 7181f166439SGeorge Zhang if (vmci_dev->notification_bitmap) { 7191f166439SGeorge Zhang /* 7201f166439SGeorge Zhang * The device reset above cleared the bitmap state of the 7211f166439SGeorge Zhang * device, so we can safely free it here. 7221f166439SGeorge Zhang */ 7231f166439SGeorge Zhang 7246d6dfb4fSAndy King dma_free_coherent(&pdev->dev, PAGE_SIZE, 7256d6dfb4fSAndy King vmci_dev->notification_bitmap, 7266d6dfb4fSAndy King vmci_dev->notification_base); 7271f166439SGeorge Zhang } 7281f166439SGeorge Zhang 7291f166439SGeorge Zhang vfree(vmci_dev->data_buffer); 7301f166439SGeorge Zhang 7311f166439SGeorge Zhang /* The rest are managed resources and will be freed by PCI core */ 7321f166439SGeorge Zhang } 7331f166439SGeorge Zhang 73432182cd3SGreg Kroah-Hartman static const struct pci_device_id vmci_ids[] = { 7351f166439SGeorge Zhang { PCI_DEVICE(PCI_VENDOR_ID_VMWARE, PCI_DEVICE_ID_VMWARE_VMCI), }, 7361f166439SGeorge Zhang { 0 }, 7371f166439SGeorge Zhang }; 7381f166439SGeorge Zhang MODULE_DEVICE_TABLE(pci, vmci_ids); 7391f166439SGeorge Zhang 7401f166439SGeorge Zhang static struct pci_driver vmci_guest_driver = { 7411f166439SGeorge Zhang .name = KBUILD_MODNAME, 7421f166439SGeorge Zhang .id_table = vmci_ids, 7431f166439SGeorge Zhang .probe = vmci_guest_probe_device, 7441f166439SGeorge Zhang .remove = vmci_guest_remove_device, 7451f166439SGeorge Zhang }; 7461f166439SGeorge Zhang 7471f166439SGeorge Zhang int __init vmci_guest_init(void) 7481f166439SGeorge Zhang { 7491f166439SGeorge Zhang return pci_register_driver(&vmci_guest_driver); 7501f166439SGeorge Zhang } 7511f166439SGeorge Zhang 7521f166439SGeorge Zhang void __exit vmci_guest_exit(void) 7531f166439SGeorge Zhang { 7541f166439SGeorge Zhang pci_unregister_driver(&vmci_guest_driver); 7551f166439SGeorge Zhang } 756