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dm: mei: add module initialization

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Register virtio device virtio-mei.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>

Tracked-On: #1536
Signed-off-by: Liu Shuo <shuo.a.liu@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Acked-by: Wang, Yu1 <yu1.wang@intel.com>
This commit is contained in:
Tomas Winkler 2018-10-19 18:08:42 +03:00 committed by wenlingz
parent f6e6e8584e
commit d4b9bd599d
1 changed files with 235 additions and 0 deletions
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235
devicemodel/hw/pci/virtio/virtio_mei.c
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@ -2079,3 +2079,238 @@ struct virtio_ops virtio_mei_ops = {
.apply_features = NULL,
.set_status = NULL,
};
static int filter_dirs(const struct dirent *d)
{
return !((strcmp(d->d_name, ".") == 0) ||
(strcmp(d->d_name, "..") == 0));
}
static int
vmei_get_devname(char *name, size_t namesize,
unsigned int bus, unsigned int slot, unsigned int func)
{
char path[256];
struct stat buf;
struct dirent **namelist = NULL;
int n, ret = 0;
snprintf(path, sizeof(path),
"/sys/bus/pci/drivers/mei_me/0000:%02x:%02x.%1u/mei/",
bus, slot, func);
if (stat(path, &buf) < 0)
return -1;
n = scandir(path, &namelist, filter_dirs, alphasort);
if (n == 1)
snprintf(name, namesize, "%s", namelist[0]->d_name);
else
ret = -1;
while (n-- > 0)
free(namelist[n]);
free(namelist);
return ret;
}
static int
vmei_init(struct vmctx *ctx, struct pci_vdev *dev, char *opts)
{
struct virtio_mei *vmei;
char tname[MAXCOMLEN + 1];
pthread_mutexattr_t attr;
int i, rc;
char *endptr = NULL;
char *opt;
unsigned int bus = 0, slot = 0, func = 0;
char name[DEV_NAME_SIZE + 1];
vmei_debug = 0;
if (!opts)
goto init;
while ((opt = strsep(&opts, ",")) != NULL) {
if (sscanf(opt, "%x/%x/%x", &bus, &slot, &func) == 3)
continue;
if (!strncmp(opt, "d", 1)) {
vmei_debug = strtoul(opt + 1, &endptr, 10);
if (endptr == opt || vmei_debug > 8) {
vmei_debug = 0;
WPRINTF("init: unknown debug flag %s\n",
opts + 1);
}
continue;
}
WPRINTF("Invalid option: %s\n", opt);
}
if (vmei_debug)
vmei_dbg_file = fopen("/tmp/vmei_log", "a+");
init:
rc = vmei_get_devname(name, sizeof(name), bus, slot, func);
if (rc) {
WPRINTF("init: fail to get mei path!\n");
strncpy(name, "mei0", sizeof(name));
}
DPRINTF("init: starting\n");
vmei = calloc(1, sizeof(*vmei));
if (!vmei) {
WPRINTF("init: fail to alloc virtio_heci!\n");
goto fail;
}
vmei->config = calloc(1, sizeof(*vmei->config));
if (!vmei->config) {
WPRINTF("init: fail to alloc vmei_config!\n");
goto fail;
}
/* FIXME: fix get correct mapping */
vmei->vtag = ctx->vmid;
if (!vmei->vtag)
vmei->vtag = 1;
vmei->config->buf_depth = VMEI_BUF_DEPTH;
vmei->config->hw_ready = 0;
strncpy(vmei->name, name, sizeof(vmei->name));
vmei->name[sizeof(vmei->name) - 1] = 0;
snprintf(vmei->devnode, sizeof(vmei->devnode) - 1,
"/dev/%s", vmei->name);
DPRINTF("devnode = %s\n", vmei->devnode);
if (vmei_add_reset_event(vmei) < 0)
WPRINTF("init: resets won't be detected\n");
/* init mutex attribute properly */
rc = pthread_mutexattr_init(&attr);
if (rc) {
WPRINTF("init: mutexattr init fail, error %d!\n", rc);
goto fail;
}
if (virtio_uses_msix()) {
rc = pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_DEFAULT);
if (rc) {
WPRINTF("init: mutexattr_settype failed, error %d!\n",
rc);
goto fail;
}
} else {
rc = pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
if (rc) {
WPRINTF("init: mutexattr_settype failed, error %d!\n",
rc);
goto fail;
}
}
rc = pthread_mutex_init(&vmei->mutex, &attr);
pthread_mutexattr_destroy(&attr);
if (rc) {
WPRINTF("init: mutex init failed, error %d!\n", rc);
goto fail;
}
virtio_linkup(&vmei->base, &virtio_mei_ops, vmei, dev, vmei->vqs);
vmei->base.mtx = &vmei->mutex;
for (i = 0; i < VMEI_VQ_NUM; i++)
vmei->vqs[i].qsize = VMEI_RING_SZ;
vmei->vqs[VMEI_RXQ].notify = vmei_notify_rx;
vmei->vqs[VMEI_TXQ].notify = vmei_notify_tx;
/* initialize config space */
pci_set_cfgdata16(dev, PCIR_DEVICE, VIRTIO_DEV_HECI);
pci_set_cfgdata16(dev, PCIR_VENDOR, INTEL_VENDOR_ID);
pci_set_cfgdata8(dev, PCIR_CLASS, PCIC_SIMPLECOMM);
pci_set_cfgdata8(dev, PCIR_SUBCLASS, PCIS_SIMPLECOMM_OTHER);
pci_set_cfgdata16(dev, PCIR_SUBDEV_0, VIRTIO_TYPE_HECI);
pci_set_cfgdata16(dev, PCIR_SUBVEND_0, INTEL_VENDOR_ID);
if (virtio_interrupt_init(&vmei->base, virtio_uses_msix()))
goto setup_fail;
virtio_set_io_bar(&vmei->base, 0);
/*
* tx stuff, thread, mutex, cond
*/
pthread_mutex_init(&vmei->tx_mutex, NULL);
pthread_cond_init(&vmei->tx_cond, NULL);
pthread_create(&vmei->tx_thread, NULL,
vmei_tx_thread, vmei);
snprintf(tname, sizeof(tname), "vmei-%d:%d tx", dev->slot, dev->func);
pthread_setname_np(vmei->tx_thread, tname);
/*
* rx stuff
*/
pthread_mutex_init(&vmei->rx_mutex, NULL);
pthread_cond_init(&vmei->rx_cond, NULL);
pthread_create(&vmei->rx_thread, NULL,
vmei_rx_thread, (void *)vmei);
snprintf(tname, sizeof(tname), "vmei-%d:%d rx", dev->slot, dev->func);
pthread_setname_np(vmei->rx_thread, tname);
/*
* init clients
*/
pthread_mutexattr_init(&attr);
pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
pthread_mutex_init(&vmei->list_mutex, &attr);
pthread_mutexattr_destroy(&attr);
LIST_INIT(&vmei->active_clients);
/*
* start mei backend
*/
if (vmei_start(vmei, true) < 0)
goto start_fail;
return 0;
start_fail:
vmei_stop(vmei);
setup_fail:
pthread_mutex_destroy(&vmei->mutex);
fail:
if (vmei) {
free(vmei->config);
free(vmei);
}
WPRINTF("init: error\n");
return -1;
}
static void
vmei_deinit(struct vmctx *ctx, struct pci_vdev *dev, char *opts)
{
struct virtio_mei *vmei = (struct virtio_mei *)dev->arg;
(void)opts;
if (!vmei)
return;
vmei_del_reset_event(vmei);
vmei_stop(vmei);
pthread_mutex_destroy(&vmei->mutex);
free(vmei->config);
free(vmei);
}
const struct pci_vdev_ops pci_ops_vmei = {
.class_name = "virtio-heci",
.vdev_init = vmei_init,
.vdev_barwrite = virtio_pci_write,
.vdev_barread = virtio_pci_read,
.vdev_deinit = vmei_deinit
};
DEFINE_PCI_DEVTYPE(pci_ops_vmei);