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virtio: Intel IFC VF driver for VDPA
This commit introduced two layers to drive IFC VF:
(1) ifcvf_base layer, which handles IFC VF NIC hardware operations and
configurations.
(2) ifcvf_main layer, which complies to VDPA bus framework,
implemented device operations for VDPA bus, handles device probe,
bus attaching, vring operations, etc.
Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com>
Signed-off-by: Bie Tiwei <tiwei.bie@intel.com>
Signed-off-by: Wang Xiao <xiao.w.wang@intel.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20200326140125.19794-10-jasowang@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Zhu Lingshan
Michael S. Tsirkin
parent
2c53d0f64c
commit
5a2414bc45
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@ -23,4 +23,15 @@ config VDPA_SIM
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to RX. This device is used for testing, prototyping and
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development of vDPA.
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config IFCVF
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tristate "Intel IFC VF VDPA driver"
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depends on PCI_MSI
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select VDPA
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default n
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help
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This kernel module can drive Intel IFC VF NIC to offload
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virtio dataplane traffic to hardware.
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To compile this driver as a module, choose M here: the module will
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be called ifcvf.
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endif # VDPA_MENU
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@ -1,3 +1,4 @@
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# SPDX-License-Identifier: GPL-2.0
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obj-$(CONFIG_VDPA) += vdpa.o
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obj-$(CONFIG_VDPA_SIM) += vdpa_sim/
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obj-$(CONFIG_IFCVF) += ifcvf/
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3
drivers/virtio/vdpa/ifcvf/Makefile
Normal file
3
drivers/virtio/vdpa/ifcvf/Makefile
Normal file
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@ -0,0 +1,3 @@
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# SPDX-License-Identifier: GPL-2.0
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obj-$(CONFIG_IFCVF) += ifcvf.o
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ifcvf-$(CONFIG_IFCVF) += ifcvf_main.o ifcvf_base.o
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389
drivers/virtio/vdpa/ifcvf/ifcvf_base.c
Normal file
389
drivers/virtio/vdpa/ifcvf/ifcvf_base.c
Normal file
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@ -0,0 +1,389 @@
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Intel IFC VF NIC driver for virtio dataplane offloading
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*
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* Copyright (C) 2020 Intel Corporation.
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*
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* Author: Zhu Lingshan <lingshan.zhu@intel.com>
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*
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*/
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#include "ifcvf_base.h"
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static inline u8 ifc_ioread8(u8 __iomem *addr)
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{
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return ioread8(addr);
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}
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static inline u16 ifc_ioread16 (__le16 __iomem *addr)
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{
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return ioread16(addr);
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}
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static inline u32 ifc_ioread32(__le32 __iomem *addr)
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{
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return ioread32(addr);
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}
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static inline void ifc_iowrite8(u8 value, u8 __iomem *addr)
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{
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iowrite8(value, addr);
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}
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static inline void ifc_iowrite16(u16 value, __le16 __iomem *addr)
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{
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iowrite16(value, addr);
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}
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static inline void ifc_iowrite32(u32 value, __le32 __iomem *addr)
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{
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iowrite32(value, addr);
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}
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static void ifc_iowrite64_twopart(u64 val,
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__le32 __iomem *lo, __le32 __iomem *hi)
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{
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ifc_iowrite32((u32)val, lo);
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ifc_iowrite32(val >> 32, hi);
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}
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struct ifcvf_adapter *vf_to_adapter(struct ifcvf_hw *hw)
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{
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return container_of(hw, struct ifcvf_adapter, vf);
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}
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static void __iomem *get_cap_addr(struct ifcvf_hw *hw,
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struct virtio_pci_cap *cap)
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{
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struct ifcvf_adapter *ifcvf;
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struct pci_dev *pdev;
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u32 length, offset;
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u8 bar;
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length = le32_to_cpu(cap->length);
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offset = le32_to_cpu(cap->offset);
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bar = cap->bar;
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ifcvf= vf_to_adapter(hw);
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pdev = ifcvf->pdev;
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if (bar >= IFCVF_PCI_MAX_RESOURCE) {
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IFCVF_DBG(pdev,
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"Invalid bar number %u to get capabilities\n", bar);
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return NULL;
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}
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if (offset + length > pci_resource_len(pdev, bar)) {
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IFCVF_DBG(pdev,
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"offset(%u) + len(%u) overflows bar%u's capability\n",
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offset, length, bar);
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return NULL;
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}
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return hw->base[bar] + offset;
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}
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static int ifcvf_read_config_range(struct pci_dev *dev,
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uint32_t *val, int size, int where)
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{
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int ret, i;
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for (i = 0; i < size; i += 4) {
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ret = pci_read_config_dword(dev, where + i, val + i / 4);
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if (ret < 0)
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return ret;
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}
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return 0;
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}
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int ifcvf_init_hw(struct ifcvf_hw *hw, struct pci_dev *pdev)
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{
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struct virtio_pci_cap cap;
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u16 notify_off;
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int ret;
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u8 pos;
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u32 i;
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ret = pci_read_config_byte(pdev, PCI_CAPABILITY_LIST, &pos);
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if (ret < 0) {
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IFCVF_ERR(pdev, "Failed to read PCI capability list\n");
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return -EIO;
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}
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while (pos) {
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ret = ifcvf_read_config_range(pdev, (u32 *)&cap,
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sizeof(cap), pos);
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if (ret < 0) {
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IFCVF_ERR(pdev,
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"Failed to get PCI capability at %x\n", pos);
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break;
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}
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if (cap.cap_vndr != PCI_CAP_ID_VNDR)
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goto next;
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switch (cap.cfg_type) {
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case VIRTIO_PCI_CAP_COMMON_CFG:
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hw->common_cfg = get_cap_addr(hw, &cap);
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IFCVF_DBG(pdev, "hw->common_cfg = %p\n",
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hw->common_cfg);
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break;
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case VIRTIO_PCI_CAP_NOTIFY_CFG:
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pci_read_config_dword(pdev, pos + sizeof(cap),
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&hw->notify_off_multiplier);
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hw->notify_bar = cap.bar;
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hw->notify_base = get_cap_addr(hw, &cap);
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IFCVF_DBG(pdev, "hw->notify_base = %p\n",
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hw->notify_base);
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break;
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case VIRTIO_PCI_CAP_ISR_CFG:
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hw->isr = get_cap_addr(hw, &cap);
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IFCVF_DBG(pdev, "hw->isr = %p\n", hw->isr);
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break;
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case VIRTIO_PCI_CAP_DEVICE_CFG:
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hw->net_cfg = get_cap_addr(hw, &cap);
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IFCVF_DBG(pdev, "hw->net_cfg = %p\n", hw->net_cfg);
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break;
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}
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next:
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pos = cap.cap_next;
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}
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if (hw->common_cfg == NULL || hw->notify_base == NULL ||
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hw->isr == NULL || hw->net_cfg == NULL) {
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IFCVF_ERR(pdev, "Incomplete PCI capabilities\n");
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return -EIO;
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}
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for (i = 0; i < IFCVF_MAX_QUEUE_PAIRS * 2; i++) {
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ifc_iowrite16(i, &hw->common_cfg->queue_select);
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notify_off = ifc_ioread16(&hw->common_cfg->queue_notify_off);
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hw->vring[i].notify_addr = hw->notify_base +
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notify_off * hw->notify_off_multiplier;
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}
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hw->lm_cfg = hw->base[IFCVF_LM_BAR];
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IFCVF_DBG(pdev,
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"PCI capability mapping: common cfg: %p, notify base: %p\n, isr cfg: %p, device cfg: %p, multiplier: %u\n",
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hw->common_cfg, hw->notify_base, hw->isr,
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hw->net_cfg, hw->notify_off_multiplier);
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return 0;
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}
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u8 ifcvf_get_status(struct ifcvf_hw *hw)
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{
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return ifc_ioread8(&hw->common_cfg->device_status);
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}
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void ifcvf_set_status(struct ifcvf_hw *hw, u8 status)
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{
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ifc_iowrite8(status, &hw->common_cfg->device_status);
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}
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void ifcvf_reset(struct ifcvf_hw *hw)
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{
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ifcvf_set_status(hw, 0);
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/* flush set_status, make sure VF is stopped, reset */
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ifcvf_get_status(hw);
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}
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static void ifcvf_add_status(struct ifcvf_hw *hw, u8 status)
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{
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if (status != 0)
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status |= ifcvf_get_status(hw);
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ifcvf_set_status(hw, status);
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ifcvf_get_status(hw);
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}
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u64 ifcvf_get_features(struct ifcvf_hw *hw)
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{
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struct virtio_pci_common_cfg __iomem *cfg = hw->common_cfg;
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u32 features_lo, features_hi;
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ifc_iowrite32(0, &cfg->device_feature_select);
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features_lo = ifc_ioread32(&cfg->device_feature);
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ifc_iowrite32(1, &cfg->device_feature_select);
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features_hi = ifc_ioread32(&cfg->device_feature);
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return ((u64)features_hi << 32) | features_lo;
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}
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void ifcvf_read_net_config(struct ifcvf_hw *hw, u64 offset,
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void *dst, int length)
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{
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u8 old_gen, new_gen, *p;
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int i;
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WARN_ON(offset + length > sizeof(struct virtio_net_config));
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do {
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old_gen = ifc_ioread8(&hw->common_cfg->config_generation);
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p = dst;
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for (i = 0; i < length; i++)
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*p++ = ifc_ioread8(hw->net_cfg + offset + i);
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new_gen = ifc_ioread8(&hw->common_cfg->config_generation);
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} while (old_gen != new_gen);
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}
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void ifcvf_write_net_config(struct ifcvf_hw *hw, u64 offset,
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const void *src, int length)
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{
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const u8 *p;
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int i;
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p = src;
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WARN_ON(offset + length > sizeof(struct virtio_net_config));
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for (i = 0; i < length; i++)
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ifc_iowrite8(*p++, hw->net_cfg + offset + i);
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}
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static void ifcvf_set_features(struct ifcvf_hw *hw, u64 features)
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{
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struct virtio_pci_common_cfg __iomem *cfg = hw->common_cfg;
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ifc_iowrite32(0, &cfg->guest_feature_select);
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ifc_iowrite32((u32)features, &cfg->guest_feature);
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ifc_iowrite32(1, &cfg->guest_feature_select);
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ifc_iowrite32(features >> 32, &cfg->guest_feature);
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}
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static int ifcvf_config_features(struct ifcvf_hw *hw)
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{
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struct ifcvf_adapter *ifcvf;
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ifcvf = vf_to_adapter(hw);
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ifcvf_set_features(hw, hw->req_features);
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ifcvf_add_status(hw, VIRTIO_CONFIG_S_FEATURES_OK);
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if (!(ifcvf_get_status(hw) & VIRTIO_CONFIG_S_FEATURES_OK)) {
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IFCVF_ERR(ifcvf->pdev, "Failed to set FEATURES_OK status\n");
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return -EIO;
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}
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return 0;
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}
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u64 ifcvf_get_vq_state(struct ifcvf_hw *hw, u16 qid)
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{
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struct ifcvf_lm_cfg __iomem *ifcvf_lm;
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void __iomem *avail_idx_addr;
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u16 last_avail_idx;
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u32 q_pair_id;
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ifcvf_lm = (struct ifcvf_lm_cfg __iomem *)hw->lm_cfg;
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q_pair_id = qid / (IFCVF_MAX_QUEUE_PAIRS * 2);
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avail_idx_addr = &ifcvf_lm->vring_lm_cfg[q_pair_id].idx_addr[qid % 2];
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last_avail_idx = ifc_ioread16(avail_idx_addr);
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return last_avail_idx;
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}
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int ifcvf_set_vq_state(struct ifcvf_hw *hw, u16 qid, u64 num)
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{
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struct ifcvf_lm_cfg __iomem *ifcvf_lm;
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void __iomem *avail_idx_addr;
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u32 q_pair_id;
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ifcvf_lm = (struct ifcvf_lm_cfg __iomem *)hw->lm_cfg;
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q_pair_id = qid / (IFCVF_MAX_QUEUE_PAIRS * 2);
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avail_idx_addr = &ifcvf_lm->vring_lm_cfg[q_pair_id].idx_addr[qid % 2];
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hw->vring[qid].last_avail_idx = num;
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ifc_iowrite16(num, avail_idx_addr);
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return 0;
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}
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static int ifcvf_hw_enable(struct ifcvf_hw *hw)
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{
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struct ifcvf_lm_cfg __iomem *ifcvf_lm;
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struct virtio_pci_common_cfg __iomem *cfg;
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struct ifcvf_adapter *ifcvf;
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u32 i;
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ifcvf_lm = (struct ifcvf_lm_cfg __iomem *)hw->lm_cfg;
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ifcvf = vf_to_adapter(hw);
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cfg = hw->common_cfg;
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ifc_iowrite16(IFCVF_MSI_CONFIG_OFF, &cfg->msix_config);
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if (ifc_ioread16(&cfg->msix_config) == VIRTIO_MSI_NO_VECTOR) {
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IFCVF_ERR(ifcvf->pdev, "No msix vector for device config\n");
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return -EINVAL;
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}
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for (i = 0; i < hw->nr_vring; i++) {
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if (!hw->vring[i].ready)
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break;
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ifc_iowrite16(i, &cfg->queue_select);
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ifc_iowrite64_twopart(hw->vring[i].desc, &cfg->queue_desc_lo,
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&cfg->queue_desc_hi);
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ifc_iowrite64_twopart(hw->vring[i].avail, &cfg->queue_avail_lo,
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&cfg->queue_avail_hi);
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ifc_iowrite64_twopart(hw->vring[i].used, &cfg->queue_used_lo,
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&cfg->queue_used_hi);
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ifc_iowrite16(hw->vring[i].size, &cfg->queue_size);
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ifc_iowrite16(i + IFCVF_MSI_QUEUE_OFF, &cfg->queue_msix_vector);
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if (ifc_ioread16(&cfg->queue_msix_vector) ==
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VIRTIO_MSI_NO_VECTOR) {
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IFCVF_ERR(ifcvf->pdev,
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"No msix vector for queue %u\n", i);
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return -EINVAL;
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}
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ifcvf_set_vq_state(hw, i, hw->vring[i].last_avail_idx);
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ifc_iowrite16(1, &cfg->queue_enable);
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}
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return 0;
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}
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static void ifcvf_hw_disable(struct ifcvf_hw *hw)
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{
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struct virtio_pci_common_cfg __iomem *cfg;
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u32 i;
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cfg = hw->common_cfg;
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ifc_iowrite16(VIRTIO_MSI_NO_VECTOR, &cfg->msix_config);
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for (i = 0; i < hw->nr_vring; i++) {
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ifc_iowrite16(i, &cfg->queue_select);
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ifc_iowrite16(VIRTIO_MSI_NO_VECTOR, &cfg->queue_msix_vector);
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}
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ifc_ioread16(&cfg->queue_msix_vector);
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}
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int ifcvf_start_hw(struct ifcvf_hw *hw)
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{
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ifcvf_reset(hw);
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ifcvf_add_status(hw, VIRTIO_CONFIG_S_ACKNOWLEDGE);
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ifcvf_add_status(hw, VIRTIO_CONFIG_S_DRIVER);
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if (ifcvf_config_features(hw) < 0)
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return -EINVAL;
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if (ifcvf_hw_enable(hw) < 0)
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return -EINVAL;
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ifcvf_add_status(hw, VIRTIO_CONFIG_S_DRIVER_OK);
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return 0;
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}
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void ifcvf_stop_hw(struct ifcvf_hw *hw)
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{
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ifcvf_hw_disable(hw);
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ifcvf_reset(hw);
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}
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void ifcvf_notify_queue(struct ifcvf_hw *hw, u16 qid)
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{
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ifc_iowrite16(qid, hw->vring[qid].notify_addr);
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}
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118
drivers/virtio/vdpa/ifcvf/ifcvf_base.h
Normal file
118
drivers/virtio/vdpa/ifcvf/ifcvf_base.h
Normal file
|
|
@ -0,0 +1,118 @@
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/* SPDX-License-Identifier: GPL-2.0-only */
|
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/*
|
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* Intel IFC VF NIC driver for virtio dataplane offloading
|
||||
*
|
||||
* Copyright (C) 2020 Intel Corporation.
|
||||
*
|
||||
* Author: Zhu Lingshan <lingshan.zhu@intel.com>
|
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*
|
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*/
|
||||
|
||||
#ifndef _IFCVF_H_
|
||||
#define _IFCVF_H_
|
||||
|
||||
#include <linux/pci.h>
|
||||
#include <linux/pci_regs.h>
|
||||
#include <linux/vdpa.h>
|
||||
#include <uapi/linux/virtio_net.h>
|
||||
#include <uapi/linux/virtio_config.h>
|
||||
#include <uapi/linux/virtio_pci.h>
|
||||
|
||||
#define IFCVF_VENDOR_ID 0x1AF4
|
||||
#define IFCVF_DEVICE_ID 0x1041
|
||||
#define IFCVF_SUBSYS_VENDOR_ID 0x8086
|
||||
#define IFCVF_SUBSYS_DEVICE_ID 0x001A
|
||||
|
||||
#define IFCVF_SUPPORTED_FEATURES \
|
||||
((1ULL << VIRTIO_NET_F_MAC) | \
|
||||
(1ULL << VIRTIO_F_ANY_LAYOUT) | \
|
||||
(1ULL << VIRTIO_F_VERSION_1) | \
|
||||
(1ULL << VIRTIO_F_ORDER_PLATFORM) | \
|
||||
(1ULL << VIRTIO_F_IOMMU_PLATFORM) | \
|
||||
(1ULL << VIRTIO_NET_F_MRG_RXBUF))
|
||||
|
||||
/* Only one queue pair for now. */
|
||||
#define IFCVF_MAX_QUEUE_PAIRS 1
|
||||
|
||||
#define IFCVF_QUEUE_ALIGNMENT PAGE_SIZE
|
||||
#define IFCVF_QUEUE_MAX 32768
|
||||
#define IFCVF_MSI_CONFIG_OFF 0
|
||||
#define IFCVF_MSI_QUEUE_OFF 1
|
||||
#define IFCVF_PCI_MAX_RESOURCE 6
|
||||
|
||||
#define IFCVF_LM_CFG_SIZE 0x40
|
||||
#define IFCVF_LM_RING_STATE_OFFSET 0x20
|
||||
#define IFCVF_LM_BAR 4
|
||||
|
||||
#define IFCVF_ERR(pdev, fmt, ...) dev_err(&pdev->dev, fmt, ##__VA_ARGS__)
|
||||
#define IFCVF_DBG(pdev, fmt, ...) dev_dbg(&pdev->dev, fmt, ##__VA_ARGS__)
|
||||
#define IFCVF_INFO(pdev, fmt, ...) dev_info(&pdev->dev, fmt, ##__VA_ARGS__)
|
||||
|
||||
#define ifcvf_private_to_vf(adapter) \
|
||||
(&((struct ifcvf_adapter *)adapter)->vf)
|
||||
|
||||
#define IFCVF_MAX_INTR (IFCVF_MAX_QUEUE_PAIRS * 2 + 1)
|
||||
|
||||
struct vring_info {
|
||||
u64 desc;
|
||||
u64 avail;
|
||||
u64 used;
|
||||
u16 size;
|
||||
u16 last_avail_idx;
|
||||
bool ready;
|
||||
void __iomem *notify_addr;
|
||||
u32 irq;
|
||||
struct vdpa_callback cb;
|
||||
char msix_name[256];
|
||||
};
|
||||
|
||||
struct ifcvf_hw {
|
||||
u8 __iomem *isr;
|
||||
/* Live migration */
|
||||
u8 __iomem *lm_cfg;
|
||||
u16 nr_vring;
|
||||
/* Notification bar number */
|
||||
u8 notify_bar;
|
||||
/* Notificaiton bar address */
|
||||
void __iomem *notify_base;
|
||||
u32 notify_off_multiplier;
|
||||
u64 req_features;
|
||||
struct virtio_pci_common_cfg __iomem *common_cfg;
|
||||
void __iomem *net_cfg;
|
||||
struct vring_info vring[IFCVF_MAX_QUEUE_PAIRS * 2];
|
||||
void __iomem * const *base;
|
||||
};
|
||||
|
||||
struct ifcvf_adapter {
|
||||
struct vdpa_device vdpa;
|
||||
struct pci_dev *pdev;
|
||||
struct ifcvf_hw vf;
|
||||
};
|
||||
|
||||
struct ifcvf_vring_lm_cfg {
|
||||
u32 idx_addr[2];
|
||||
u8 reserved[IFCVF_LM_CFG_SIZE - 8];
|
||||
};
|
||||
|
||||
struct ifcvf_lm_cfg {
|
||||
u8 reserved[IFCVF_LM_RING_STATE_OFFSET];
|
||||
struct ifcvf_vring_lm_cfg vring_lm_cfg[IFCVF_MAX_QUEUE_PAIRS];
|
||||
};
|
||||
|
||||
int ifcvf_init_hw(struct ifcvf_hw *hw, struct pci_dev *dev);
|
||||
int ifcvf_start_hw(struct ifcvf_hw *hw);
|
||||
void ifcvf_stop_hw(struct ifcvf_hw *hw);
|
||||
void ifcvf_notify_queue(struct ifcvf_hw *hw, u16 qid);
|
||||
void ifcvf_read_net_config(struct ifcvf_hw *hw, u64 offset,
|
||||
void *dst, int length);
|
||||
void ifcvf_write_net_config(struct ifcvf_hw *hw, u64 offset,
|
||||
const void *src, int length);
|
||||
u8 ifcvf_get_status(struct ifcvf_hw *hw);
|
||||
void ifcvf_set_status(struct ifcvf_hw *hw, u8 status);
|
||||
void io_write64_twopart(u64 val, u32 *lo, u32 *hi);
|
||||
void ifcvf_reset(struct ifcvf_hw *hw);
|
||||
u64 ifcvf_get_features(struct ifcvf_hw *hw);
|
||||
u64 ifcvf_get_vq_state(struct ifcvf_hw *hw, u16 qid);
|
||||
int ifcvf_set_vq_state(struct ifcvf_hw *hw, u16 qid, u64 num);
|
||||
struct ifcvf_adapter *vf_to_adapter(struct ifcvf_hw *hw);
|
||||
#endif /* _IFCVF_H_ */
|
||||
435
drivers/virtio/vdpa/ifcvf/ifcvf_main.c
Normal file
435
drivers/virtio/vdpa/ifcvf/ifcvf_main.c
Normal file
|
|
@ -0,0 +1,435 @@
|
|||
// SPDX-License-Identifier: GPL-2.0-only
|
||||
/*
|
||||
* Intel IFC VF NIC driver for virtio dataplane offloading
|
||||
*
|
||||
* Copyright (C) 2020 Intel Corporation.
|
||||
*
|
||||
* Author: Zhu Lingshan <lingshan.zhu@intel.com>
|
||||
*
|
||||
*/
|
||||
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/pci.h>
|
||||
#include <linux/sysfs.h>
|
||||
#include "ifcvf_base.h"
|
||||
|
||||
#define VERSION_STRING "0.1"
|
||||
#define DRIVER_AUTHOR "Intel Corporation"
|
||||
#define IFCVF_DRIVER_NAME "ifcvf"
|
||||
|
||||
static irqreturn_t ifcvf_intr_handler(int irq, void *arg)
|
||||
{
|
||||
struct vring_info *vring = arg;
|
||||
|
||||
if (vring->cb.callback)
|
||||
return vring->cb.callback(vring->cb.private);
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static int ifcvf_start_datapath(void *private)
|
||||
{
|
||||
struct ifcvf_hw *vf = ifcvf_private_to_vf(private);
|
||||
struct ifcvf_adapter *ifcvf;
|
||||
u8 status;
|
||||
int ret;
|
||||
|
||||
ifcvf = vf_to_adapter(vf);
|
||||
vf->nr_vring = IFCVF_MAX_QUEUE_PAIRS * 2;
|
||||
ret = ifcvf_start_hw(vf);
|
||||
if (ret < 0) {
|
||||
status = ifcvf_get_status(vf);
|
||||
status |= VIRTIO_CONFIG_S_FAILED;
|
||||
ifcvf_set_status(vf, status);
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int ifcvf_stop_datapath(void *private)
|
||||
{
|
||||
struct ifcvf_hw *vf = ifcvf_private_to_vf(private);
|
||||
int i;
|
||||
|
||||
for (i = 0; i < IFCVF_MAX_QUEUE_PAIRS * 2; i++)
|
||||
vf->vring[i].cb.callback = NULL;
|
||||
|
||||
ifcvf_stop_hw(vf);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void ifcvf_reset_vring(struct ifcvf_adapter *adapter)
|
||||
{
|
||||
struct ifcvf_hw *vf = ifcvf_private_to_vf(adapter);
|
||||
int i;
|
||||
|
||||
for (i = 0; i < IFCVF_MAX_QUEUE_PAIRS * 2; i++) {
|
||||
vf->vring[i].last_avail_idx = 0;
|
||||
vf->vring[i].desc = 0;
|
||||
vf->vring[i].avail = 0;
|
||||
vf->vring[i].used = 0;
|
||||
vf->vring[i].ready = 0;
|
||||
vf->vring[i].cb.callback = NULL;
|
||||
vf->vring[i].cb.private = NULL;
|
||||
}
|
||||
|
||||
ifcvf_reset(vf);
|
||||
}
|
||||
|
||||
static struct ifcvf_adapter *vdpa_to_adapter(struct vdpa_device *vdpa_dev)
|
||||
{
|
||||
return container_of(vdpa_dev, struct ifcvf_adapter, vdpa);
|
||||
}
|
||||
|
||||
static struct ifcvf_hw *vdpa_to_vf(struct vdpa_device *vdpa_dev)
|
||||
{
|
||||
struct ifcvf_adapter *adapter = vdpa_to_adapter(vdpa_dev);
|
||||
|
||||
return &adapter->vf;
|
||||
}
|
||||
|
||||
static u64 ifcvf_vdpa_get_features(struct vdpa_device *vdpa_dev)
|
||||
{
|
||||
struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
|
||||
u64 features;
|
||||
|
||||
features = ifcvf_get_features(vf) & IFCVF_SUPPORTED_FEATURES;
|
||||
|
||||
return features;
|
||||
}
|
||||
|
||||
static int ifcvf_vdpa_set_features(struct vdpa_device *vdpa_dev, u64 features)
|
||||
{
|
||||
struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
|
||||
|
||||
vf->req_features = features;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static u8 ifcvf_vdpa_get_status(struct vdpa_device *vdpa_dev)
|
||||
{
|
||||
struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
|
||||
|
||||
return ifcvf_get_status(vf);
|
||||
}
|
||||
|
||||
static void ifcvf_vdpa_set_status(struct vdpa_device *vdpa_dev, u8 status)
|
||||
{
|
||||
struct ifcvf_adapter *adapter;
|
||||
struct ifcvf_hw *vf;
|
||||
|
||||
vf = vdpa_to_vf(vdpa_dev);
|
||||
adapter = dev_get_drvdata(vdpa_dev->dev.parent);
|
||||
|
||||
if (status == 0) {
|
||||
ifcvf_stop_datapath(adapter);
|
||||
ifcvf_reset_vring(adapter);
|
||||
return;
|
||||
}
|
||||
|
||||
if (status & VIRTIO_CONFIG_S_DRIVER_OK) {
|
||||
if (ifcvf_start_datapath(adapter) < 0)
|
||||
IFCVF_ERR(adapter->pdev,
|
||||
"Failed to set ifcvf vdpa status %u\n",
|
||||
status);
|
||||
}
|
||||
|
||||
ifcvf_set_status(vf, status);
|
||||
}
|
||||
|
||||
static u16 ifcvf_vdpa_get_vq_num_max(struct vdpa_device *vdpa_dev)
|
||||
{
|
||||
return IFCVF_QUEUE_MAX;
|
||||
}
|
||||
|
||||
static u64 ifcvf_vdpa_get_vq_state(struct vdpa_device *vdpa_dev, u16 qid)
|
||||
{
|
||||
struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
|
||||
|
||||
return ifcvf_get_vq_state(vf, qid);
|
||||
}
|
||||
|
||||
static int ifcvf_vdpa_set_vq_state(struct vdpa_device *vdpa_dev, u16 qid,
|
||||
u64 num)
|
||||
{
|
||||
struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
|
||||
|
||||
return ifcvf_set_vq_state(vf, qid, num);
|
||||
}
|
||||
|
||||
static void ifcvf_vdpa_set_vq_cb(struct vdpa_device *vdpa_dev, u16 qid,
|
||||
struct vdpa_callback *cb)
|
||||
{
|
||||
struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
|
||||
|
||||
vf->vring[qid].cb = *cb;
|
||||
}
|
||||
|
||||
static void ifcvf_vdpa_set_vq_ready(struct vdpa_device *vdpa_dev,
|
||||
u16 qid, bool ready)
|
||||
{
|
||||
struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
|
||||
|
||||
vf->vring[qid].ready = ready;
|
||||
}
|
||||
|
||||
static bool ifcvf_vdpa_get_vq_ready(struct vdpa_device *vdpa_dev, u16 qid)
|
||||
{
|
||||
struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
|
||||
|
||||
return vf->vring[qid].ready;
|
||||
}
|
||||
|
||||
static void ifcvf_vdpa_set_vq_num(struct vdpa_device *vdpa_dev, u16 qid,
|
||||
u32 num)
|
||||
{
|
||||
struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
|
||||
|
||||
vf->vring[qid].size = num;
|
||||
}
|
||||
|
||||
static int ifcvf_vdpa_set_vq_address(struct vdpa_device *vdpa_dev, u16 qid,
|
||||
u64 desc_area, u64 driver_area,
|
||||
u64 device_area)
|
||||
{
|
||||
struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
|
||||
|
||||
vf->vring[qid].desc = desc_area;
|
||||
vf->vring[qid].avail = driver_area;
|
||||
vf->vring[qid].used = device_area;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void ifcvf_vdpa_kick_vq(struct vdpa_device *vdpa_dev, u16 qid)
|
||||
{
|
||||
struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
|
||||
|
||||
ifcvf_notify_queue(vf, qid);
|
||||
}
|
||||
|
||||
static u32 ifcvf_vdpa_get_generation(struct vdpa_device *vdpa_dev)
|
||||
{
|
||||
struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
|
||||
|
||||
return ioread8(&vf->common_cfg->config_generation);
|
||||
}
|
||||
|
||||
static u32 ifcvf_vdpa_get_device_id(struct vdpa_device *vdpa_dev)
|
||||
{
|
||||
return VIRTIO_ID_NET;
|
||||
}
|
||||
|
||||
static u32 ifcvf_vdpa_get_vendor_id(struct vdpa_device *vdpa_dev)
|
||||
{
|
||||
return IFCVF_SUBSYS_VENDOR_ID;
|
||||
}
|
||||
|
||||
static u16 ifcvf_vdpa_get_vq_align(struct vdpa_device *vdpa_dev)
|
||||
{
|
||||
return IFCVF_QUEUE_ALIGNMENT;
|
||||
}
|
||||
|
||||
static void ifcvf_vdpa_get_config(struct vdpa_device *vdpa_dev,
|
||||
unsigned int offset,
|
||||
void *buf, unsigned int len)
|
||||
{
|
||||
struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
|
||||
|
||||
WARN_ON(offset + len > sizeof(struct virtio_net_config));
|
||||
ifcvf_read_net_config(vf, offset, buf, len);
|
||||
}
|
||||
|
||||
static void ifcvf_vdpa_set_config(struct vdpa_device *vdpa_dev,
|
||||
unsigned int offset, const void *buf,
|
||||
unsigned int len)
|
||||
{
|
||||
struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
|
||||
|
||||
WARN_ON(offset + len > sizeof(struct virtio_net_config));
|
||||
ifcvf_write_net_config(vf, offset, buf, len);
|
||||
}
|
||||
|
||||
static void ifcvf_vdpa_set_config_cb(struct vdpa_device *vdpa_dev,
|
||||
struct vdpa_callback *cb)
|
||||
{
|
||||
/* We don't support config interrupt */
|
||||
}
|
||||
|
||||
/*
|
||||
* IFCVF currently does't have on-chip IOMMU, so not
|
||||
* implemented set_map()/dma_map()/dma_unmap()
|
||||
*/
|
||||
static const struct vdpa_config_ops ifc_vdpa_ops = {
|
||||
.get_features = ifcvf_vdpa_get_features,
|
||||
.set_features = ifcvf_vdpa_set_features,
|
||||
.get_status = ifcvf_vdpa_get_status,
|
||||
.set_status = ifcvf_vdpa_set_status,
|
||||
.get_vq_num_max = ifcvf_vdpa_get_vq_num_max,
|
||||
.get_vq_state = ifcvf_vdpa_get_vq_state,
|
||||
.set_vq_state = ifcvf_vdpa_set_vq_state,
|
||||
.set_vq_cb = ifcvf_vdpa_set_vq_cb,
|
||||
.set_vq_ready = ifcvf_vdpa_set_vq_ready,
|
||||
.get_vq_ready = ifcvf_vdpa_get_vq_ready,
|
||||
.set_vq_num = ifcvf_vdpa_set_vq_num,
|
||||
.set_vq_address = ifcvf_vdpa_set_vq_address,
|
||||
.kick_vq = ifcvf_vdpa_kick_vq,
|
||||
.get_generation = ifcvf_vdpa_get_generation,
|
||||
.get_device_id = ifcvf_vdpa_get_device_id,
|
||||
.get_vendor_id = ifcvf_vdpa_get_vendor_id,
|
||||
.get_vq_align = ifcvf_vdpa_get_vq_align,
|
||||
.get_config = ifcvf_vdpa_get_config,
|
||||
.set_config = ifcvf_vdpa_set_config,
|
||||
.set_config_cb = ifcvf_vdpa_set_config_cb,
|
||||
};
|
||||
|
||||
static int ifcvf_request_irq(struct ifcvf_adapter *adapter)
|
||||
{
|
||||
struct pci_dev *pdev = adapter->pdev;
|
||||
struct ifcvf_hw *vf = &adapter->vf;
|
||||
int vector, i, ret, irq;
|
||||
|
||||
|
||||
for (i = 0; i < IFCVF_MAX_QUEUE_PAIRS * 2; i++) {
|
||||
snprintf(vf->vring[i].msix_name, 256, "ifcvf[%s]-%d\n",
|
||||
pci_name(pdev), i);
|
||||
vector = i + IFCVF_MSI_QUEUE_OFF;
|
||||
irq = pci_irq_vector(pdev, vector);
|
||||
ret = devm_request_irq(&pdev->dev, irq,
|
||||
ifcvf_intr_handler, 0,
|
||||
vf->vring[i].msix_name,
|
||||
&vf->vring[i]);
|
||||
if (ret) {
|
||||
IFCVF_ERR(pdev,
|
||||
"Failed to request irq for vq %d\n", i);
|
||||
return ret;
|
||||
}
|
||||
vf->vring[i].irq = irq;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void ifcvf_free_irq_vectors(void *data)
|
||||
{
|
||||
pci_free_irq_vectors(data);
|
||||
}
|
||||
|
||||
static int ifcvf_probe(struct pci_dev *pdev, const struct pci_device_id *id)
|
||||
{
|
||||
struct device *dev = &pdev->dev;
|
||||
struct ifcvf_adapter *adapter;
|
||||
struct ifcvf_hw *vf;
|
||||
int ret;
|
||||
|
||||
ret = pcim_enable_device(pdev);
|
||||
if (ret) {
|
||||
IFCVF_ERR(pdev, "Failed to enable device\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
ret = pcim_iomap_regions(pdev, BIT(0) | BIT(2) | BIT(4),
|
||||
IFCVF_DRIVER_NAME);
|
||||
if (ret) {
|
||||
IFCVF_ERR(pdev, "Failed to request MMIO region\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
|
||||
if (ret) {
|
||||
IFCVF_ERR(pdev, "No usable DMA confiugration\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
|
||||
if (ret) {
|
||||
IFCVF_ERR(pdev,
|
||||
"No usable coherent DMA confiugration\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
ret = pci_alloc_irq_vectors(pdev, IFCVF_MAX_INTR,
|
||||
IFCVF_MAX_INTR, PCI_IRQ_MSIX);
|
||||
if (ret < 0) {
|
||||
IFCVF_ERR(pdev, "Failed to alloc irq vectors\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
ret = devm_add_action_or_reset(dev, ifcvf_free_irq_vectors, pdev);
|
||||
if (ret) {
|
||||
IFCVF_ERR(pdev,
|
||||
"Failed for adding devres for freeing irq vectors\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
adapter = vdpa_alloc_device(struct ifcvf_adapter, vdpa,
|
||||
dev, &ifc_vdpa_ops);
|
||||
if (adapter == NULL) {
|
||||
IFCVF_ERR(pdev, "Failed to allocate vDPA structure");
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
pci_set_master(pdev);
|
||||
pci_set_drvdata(pdev, adapter);
|
||||
|
||||
vf = &adapter->vf;
|
||||
vf->base = pcim_iomap_table(pdev);
|
||||
|
||||
adapter->pdev = pdev;
|
||||
adapter->vdpa.dma_dev = &pdev->dev;
|
||||
|
||||
ret = ifcvf_request_irq(adapter);
|
||||
if (ret) {
|
||||
IFCVF_ERR(pdev, "Failed to request MSI-X irq\n");
|
||||
goto err;
|
||||
}
|
||||
|
||||
ret = ifcvf_init_hw(vf, pdev);
|
||||
if (ret) {
|
||||
IFCVF_ERR(pdev, "Failed to init IFCVF hw\n");
|
||||
goto err;
|
||||
}
|
||||
|
||||
ret = vdpa_register_device(&adapter->vdpa);
|
||||
if (ret) {
|
||||
IFCVF_ERR(pdev, "Failed to register ifcvf to vdpa bus");
|
||||
goto err;
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
err:
|
||||
put_device(&adapter->vdpa.dev);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void ifcvf_remove(struct pci_dev *pdev)
|
||||
{
|
||||
struct ifcvf_adapter *adapter = pci_get_drvdata(pdev);
|
||||
|
||||
vdpa_unregister_device(&adapter->vdpa);
|
||||
}
|
||||
|
||||
static struct pci_device_id ifcvf_pci_ids[] = {
|
||||
{ PCI_DEVICE_SUB(IFCVF_VENDOR_ID,
|
||||
IFCVF_DEVICE_ID,
|
||||
IFCVF_SUBSYS_VENDOR_ID,
|
||||
IFCVF_SUBSYS_DEVICE_ID) },
|
||||
{ 0 },
|
||||
};
|
||||
MODULE_DEVICE_TABLE(pci, ifcvf_pci_ids);
|
||||
|
||||
static struct pci_driver ifcvf_driver = {
|
||||
.name = IFCVF_DRIVER_NAME,
|
||||
.id_table = ifcvf_pci_ids,
|
||||
.probe = ifcvf_probe,
|
||||
.remove = ifcvf_remove,
|
||||
};
|
||||
|
||||
module_pci_driver(ifcvf_driver);
|
||||
|
||||
MODULE_LICENSE("GPL v2");
|
||||
MODULE_VERSION(VERSION_STRING);
|
||||
Loading…
Reference in New Issue
Block a user