Shannon Nelson 151cc834f3 pds_vdpa: add support for vdpa and vdpamgmt interfaces
This is the vDPA device support, where we advertise that we can
support the virtio queues and deal with the configuration work
through the pds_core's adminq.

Signed-off-by: Shannon Nelson <shannon.nelson@amd.com>
Message-Id: <20230519215632.12343-10-shannon.nelson@amd.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
2023-06-27 10:47:09 -04:00

290 lines
8.6 KiB
C

// SPDX-License-Identifier: GPL-2.0-only
/* Copyright(c) 2023 Advanced Micro Devices, Inc */
#include <linux/pci.h>
#include <linux/vdpa.h>
#include <linux/pds/pds_common.h>
#include <linux/pds/pds_core_if.h>
#include <linux/pds/pds_adminq.h>
#include <linux/pds/pds_auxbus.h>
#include "aux_drv.h"
#include "vdpa_dev.h"
#include "debugfs.h"
static struct dentry *dbfs_dir;
void pds_vdpa_debugfs_create(void)
{
dbfs_dir = debugfs_create_dir(PDS_VDPA_DRV_NAME, NULL);
}
void pds_vdpa_debugfs_destroy(void)
{
debugfs_remove_recursive(dbfs_dir);
dbfs_dir = NULL;
}
#define PRINT_SBIT_NAME(__seq, __f, __name) \
do { \
if ((__f) & (__name)) \
seq_printf(__seq, " %s", &#__name[16]); \
} while (0)
static void print_status_bits(struct seq_file *seq, u8 status)
{
seq_puts(seq, "status:");
PRINT_SBIT_NAME(seq, status, VIRTIO_CONFIG_S_ACKNOWLEDGE);
PRINT_SBIT_NAME(seq, status, VIRTIO_CONFIG_S_DRIVER);
PRINT_SBIT_NAME(seq, status, VIRTIO_CONFIG_S_DRIVER_OK);
PRINT_SBIT_NAME(seq, status, VIRTIO_CONFIG_S_FEATURES_OK);
PRINT_SBIT_NAME(seq, status, VIRTIO_CONFIG_S_NEEDS_RESET);
PRINT_SBIT_NAME(seq, status, VIRTIO_CONFIG_S_FAILED);
seq_puts(seq, "\n");
}
static void print_feature_bits_all(struct seq_file *seq, u64 features)
{
int i;
seq_puts(seq, "features:");
for (i = 0; i < (sizeof(u64) * 8); i++) {
u64 mask = BIT_ULL(i);
switch (features & mask) {
case BIT_ULL(VIRTIO_NET_F_CSUM):
seq_puts(seq, " VIRTIO_NET_F_CSUM");
break;
case BIT_ULL(VIRTIO_NET_F_GUEST_CSUM):
seq_puts(seq, " VIRTIO_NET_F_GUEST_CSUM");
break;
case BIT_ULL(VIRTIO_NET_F_CTRL_GUEST_OFFLOADS):
seq_puts(seq, " VIRTIO_NET_F_CTRL_GUEST_OFFLOADS");
break;
case BIT_ULL(VIRTIO_NET_F_MTU):
seq_puts(seq, " VIRTIO_NET_F_MTU");
break;
case BIT_ULL(VIRTIO_NET_F_MAC):
seq_puts(seq, " VIRTIO_NET_F_MAC");
break;
case BIT_ULL(VIRTIO_NET_F_GUEST_TSO4):
seq_puts(seq, " VIRTIO_NET_F_GUEST_TSO4");
break;
case BIT_ULL(VIRTIO_NET_F_GUEST_TSO6):
seq_puts(seq, " VIRTIO_NET_F_GUEST_TSO6");
break;
case BIT_ULL(VIRTIO_NET_F_GUEST_ECN):
seq_puts(seq, " VIRTIO_NET_F_GUEST_ECN");
break;
case BIT_ULL(VIRTIO_NET_F_GUEST_UFO):
seq_puts(seq, " VIRTIO_NET_F_GUEST_UFO");
break;
case BIT_ULL(VIRTIO_NET_F_HOST_TSO4):
seq_puts(seq, " VIRTIO_NET_F_HOST_TSO4");
break;
case BIT_ULL(VIRTIO_NET_F_HOST_TSO6):
seq_puts(seq, " VIRTIO_NET_F_HOST_TSO6");
break;
case BIT_ULL(VIRTIO_NET_F_HOST_ECN):
seq_puts(seq, " VIRTIO_NET_F_HOST_ECN");
break;
case BIT_ULL(VIRTIO_NET_F_HOST_UFO):
seq_puts(seq, " VIRTIO_NET_F_HOST_UFO");
break;
case BIT_ULL(VIRTIO_NET_F_MRG_RXBUF):
seq_puts(seq, " VIRTIO_NET_F_MRG_RXBUF");
break;
case BIT_ULL(VIRTIO_NET_F_STATUS):
seq_puts(seq, " VIRTIO_NET_F_STATUS");
break;
case BIT_ULL(VIRTIO_NET_F_CTRL_VQ):
seq_puts(seq, " VIRTIO_NET_F_CTRL_VQ");
break;
case BIT_ULL(VIRTIO_NET_F_CTRL_RX):
seq_puts(seq, " VIRTIO_NET_F_CTRL_RX");
break;
case BIT_ULL(VIRTIO_NET_F_CTRL_VLAN):
seq_puts(seq, " VIRTIO_NET_F_CTRL_VLAN");
break;
case BIT_ULL(VIRTIO_NET_F_CTRL_RX_EXTRA):
seq_puts(seq, " VIRTIO_NET_F_CTRL_RX_EXTRA");
break;
case BIT_ULL(VIRTIO_NET_F_GUEST_ANNOUNCE):
seq_puts(seq, " VIRTIO_NET_F_GUEST_ANNOUNCE");
break;
case BIT_ULL(VIRTIO_NET_F_MQ):
seq_puts(seq, " VIRTIO_NET_F_MQ");
break;
case BIT_ULL(VIRTIO_NET_F_CTRL_MAC_ADDR):
seq_puts(seq, " VIRTIO_NET_F_CTRL_MAC_ADDR");
break;
case BIT_ULL(VIRTIO_NET_F_HASH_REPORT):
seq_puts(seq, " VIRTIO_NET_F_HASH_REPORT");
break;
case BIT_ULL(VIRTIO_NET_F_RSS):
seq_puts(seq, " VIRTIO_NET_F_RSS");
break;
case BIT_ULL(VIRTIO_NET_F_RSC_EXT):
seq_puts(seq, " VIRTIO_NET_F_RSC_EXT");
break;
case BIT_ULL(VIRTIO_NET_F_STANDBY):
seq_puts(seq, " VIRTIO_NET_F_STANDBY");
break;
case BIT_ULL(VIRTIO_NET_F_SPEED_DUPLEX):
seq_puts(seq, " VIRTIO_NET_F_SPEED_DUPLEX");
break;
case BIT_ULL(VIRTIO_F_NOTIFY_ON_EMPTY):
seq_puts(seq, " VIRTIO_F_NOTIFY_ON_EMPTY");
break;
case BIT_ULL(VIRTIO_F_ANY_LAYOUT):
seq_puts(seq, " VIRTIO_F_ANY_LAYOUT");
break;
case BIT_ULL(VIRTIO_F_VERSION_1):
seq_puts(seq, " VIRTIO_F_VERSION_1");
break;
case BIT_ULL(VIRTIO_F_ACCESS_PLATFORM):
seq_puts(seq, " VIRTIO_F_ACCESS_PLATFORM");
break;
case BIT_ULL(VIRTIO_F_RING_PACKED):
seq_puts(seq, " VIRTIO_F_RING_PACKED");
break;
case BIT_ULL(VIRTIO_F_ORDER_PLATFORM):
seq_puts(seq, " VIRTIO_F_ORDER_PLATFORM");
break;
case BIT_ULL(VIRTIO_F_SR_IOV):
seq_puts(seq, " VIRTIO_F_SR_IOV");
break;
case 0:
break;
default:
seq_printf(seq, " bit_%d", i);
break;
}
}
seq_puts(seq, "\n");
}
void pds_vdpa_debugfs_add_pcidev(struct pds_vdpa_aux *vdpa_aux)
{
vdpa_aux->dentry = debugfs_create_dir(pci_name(vdpa_aux->padev->vf_pdev), dbfs_dir);
}
static int identity_show(struct seq_file *seq, void *v)
{
struct pds_vdpa_aux *vdpa_aux = seq->private;
struct vdpa_mgmt_dev *mgmt;
seq_printf(seq, "aux_dev: %s\n",
dev_name(&vdpa_aux->padev->aux_dev.dev));
mgmt = &vdpa_aux->vdpa_mdev;
seq_printf(seq, "max_vqs: %d\n", mgmt->max_supported_vqs);
seq_printf(seq, "config_attr_mask: %#llx\n", mgmt->config_attr_mask);
seq_printf(seq, "supported_features: %#llx\n", mgmt->supported_features);
print_feature_bits_all(seq, mgmt->supported_features);
return 0;
}
DEFINE_SHOW_ATTRIBUTE(identity);
void pds_vdpa_debugfs_add_ident(struct pds_vdpa_aux *vdpa_aux)
{
debugfs_create_file("identity", 0400, vdpa_aux->dentry,
vdpa_aux, &identity_fops);
}
static int config_show(struct seq_file *seq, void *v)
{
struct pds_vdpa_device *pdsv = seq->private;
struct virtio_net_config vc;
u64 driver_features;
u8 status;
memcpy_fromio(&vc, pdsv->vdpa_aux->vd_mdev.device,
sizeof(struct virtio_net_config));
seq_printf(seq, "mac: %pM\n", vc.mac);
seq_printf(seq, "max_virtqueue_pairs: %d\n",
__virtio16_to_cpu(true, vc.max_virtqueue_pairs));
seq_printf(seq, "mtu: %d\n", __virtio16_to_cpu(true, vc.mtu));
seq_printf(seq, "speed: %d\n", le32_to_cpu(vc.speed));
seq_printf(seq, "duplex: %d\n", vc.duplex);
seq_printf(seq, "rss_max_key_size: %d\n", vc.rss_max_key_size);
seq_printf(seq, "rss_max_indirection_table_length: %d\n",
le16_to_cpu(vc.rss_max_indirection_table_length));
seq_printf(seq, "supported_hash_types: %#x\n",
le32_to_cpu(vc.supported_hash_types));
seq_printf(seq, "vn_status: %#x\n",
__virtio16_to_cpu(true, vc.status));
status = vp_modern_get_status(&pdsv->vdpa_aux->vd_mdev);
seq_printf(seq, "dev_status: %#x\n", status);
print_status_bits(seq, status);
seq_printf(seq, "req_features: %#llx\n", pdsv->req_features);
print_feature_bits_all(seq, pdsv->req_features);
driver_features = vp_modern_get_driver_features(&pdsv->vdpa_aux->vd_mdev);
seq_printf(seq, "driver_features: %#llx\n", driver_features);
print_feature_bits_all(seq, driver_features);
seq_printf(seq, "vdpa_index: %d\n", pdsv->vdpa_index);
seq_printf(seq, "num_vqs: %d\n", pdsv->num_vqs);
return 0;
}
DEFINE_SHOW_ATTRIBUTE(config);
static int vq_show(struct seq_file *seq, void *v)
{
struct pds_vdpa_vq_info *vq = seq->private;
seq_printf(seq, "ready: %d\n", vq->ready);
seq_printf(seq, "desc_addr: %#llx\n", vq->desc_addr);
seq_printf(seq, "avail_addr: %#llx\n", vq->avail_addr);
seq_printf(seq, "used_addr: %#llx\n", vq->used_addr);
seq_printf(seq, "q_len: %d\n", vq->q_len);
seq_printf(seq, "qid: %d\n", vq->qid);
seq_printf(seq, "doorbell: %#llx\n", vq->doorbell);
seq_printf(seq, "avail_idx: %d\n", vq->avail_idx);
seq_printf(seq, "used_idx: %d\n", vq->used_idx);
seq_printf(seq, "irq: %d\n", vq->irq);
seq_printf(seq, "irq-name: %s\n", vq->irq_name);
return 0;
}
DEFINE_SHOW_ATTRIBUTE(vq);
void pds_vdpa_debugfs_add_vdpadev(struct pds_vdpa_aux *vdpa_aux)
{
int i;
debugfs_create_file("config", 0400, vdpa_aux->dentry, vdpa_aux->pdsv, &config_fops);
for (i = 0; i < vdpa_aux->pdsv->num_vqs; i++) {
char name[8];
snprintf(name, sizeof(name), "vq%02d", i);
debugfs_create_file(name, 0400, vdpa_aux->dentry,
&vdpa_aux->pdsv->vqs[i], &vq_fops);
}
}
void pds_vdpa_debugfs_del_vdpadev(struct pds_vdpa_aux *vdpa_aux)
{
debugfs_remove_recursive(vdpa_aux->dentry);
vdpa_aux->dentry = NULL;
}
void pds_vdpa_debugfs_reset_vdpadev(struct pds_vdpa_aux *vdpa_aux)
{
/* we don't keep track of the entries, so remove it all
* then rebuild the basics
*/
pds_vdpa_debugfs_del_vdpadev(vdpa_aux);
pds_vdpa_debugfs_add_pcidev(vdpa_aux);
pds_vdpa_debugfs_add_ident(vdpa_aux);
}