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virtio: vdpa: vDPA driver for Marvell OCTEON DPU devices
This commit introduces a new vDPA driver specifically designed for managing the virtio control plane over the vDPA bus for OCTEON DPU devices. The driver consists of two layers: 1. Octep HW Layer (Octeon Endpoint): Responsible for handling hardware operations and configurations related to the DPU device. 2. Octep Main Layer: Compliant with the vDPA bus framework, this layer implements device operations for the vDPA bus. It handles device probing, bus attachment, vring operations, and other relevant tasks. Signed-off-by: Srujana Challa <schalla@marvell.com> Signed-off-by: Vamsi Attunuru <vattunuru@marvell.com> Signed-off-by: Shijith Thotton <sthotton@marvell.com> Signed-off-by: Nithin Dabilpuram <ndabilpuram@marvell.com> Acked-by: Jason Wang <jasowang@redhat.com> Message-Id: <20240614144659.1776067-1-schalla@marvell.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Srujana Challa
Michael S. Tsirkin
parent
e269d79c7d
commit
8b6c724cda
@ -13459,6 +13459,11 @@ S: Supported
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F: Documentation/devicetree/bindings/mmc/marvell,xenon-sdhci.yaml
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F: drivers/mmc/host/sdhci-xenon*
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MARVELL OCTEON ENDPOINT VIRTIO DATA PATH ACCELERATOR
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R: schalla@marvell.com
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R: vattunuru@marvell.com
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F: drivers/vdpa/octeon_ep/
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MATROX FRAMEBUFFER DRIVER
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L: linux-fbdev@vger.kernel.org
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S: Orphan
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@ -126,4 +126,15 @@ config PDS_VDPA
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With this driver, the VirtIO dataplane can be
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offloaded to an AMD/Pensando DSC device.
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config OCTEONEP_VDPA
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tristate "vDPA driver for Octeon DPU devices"
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depends on m
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depends on PCI_MSI
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help
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This is a vDPA driver designed for Marvell's Octeon DPU devices.
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This driver enables the offloading of the VirtIO dataplane to an
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Octeon DPU device.
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Please note that this driver must be built as a module and it
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cannot be loaded until the Octeon emulation software is running.
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endif # VDPA
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@ -8,3 +8,4 @@ obj-$(CONFIG_VP_VDPA) += virtio_pci/
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obj-$(CONFIG_ALIBABA_ENI_VDPA) += alibaba/
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obj-$(CONFIG_SNET_VDPA) += solidrun/
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obj-$(CONFIG_PDS_VDPA) += pds/
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obj-$(CONFIG_OCTEONEP_VDPA) += octeon_ep/
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4
drivers/vdpa/octeon_ep/Makefile
Normal file
4
drivers/vdpa/octeon_ep/Makefile
Normal file
@ -0,0 +1,4 @@
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# SPDX-License-Identifier: GPL-2.0
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obj-$(CONFIG_OCTEONEP_VDPA) += octep_vdpa.o
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octep_vdpa-$(CONFIG_OCTEONEP_VDPA) += octep_vdpa_main.o
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octep_vdpa-$(CONFIG_OCTEONEP_VDPA) += octep_vdpa_hw.o
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94
drivers/vdpa/octeon_ep/octep_vdpa.h
Normal file
94
drivers/vdpa/octeon_ep/octep_vdpa.h
Normal file
@ -0,0 +1,94 @@
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/* SPDX-License-Identifier: GPL-2.0-only
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* Copyright (C) 2024 Marvell.
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*/
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#ifndef __OCTEP_VDPA_H__
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#define __OCTEP_VDPA_H__
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#include <linux/pci.h>
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#include <linux/pci_regs.h>
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#include <linux/vdpa.h>
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#include <linux/virtio_pci_modern.h>
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#include <uapi/linux/virtio_net.h>
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#include <uapi/linux/virtio_blk.h>
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#include <uapi/linux/virtio_config.h>
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#include <uapi/linux/virtio_pci.h>
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#include <uapi/linux/vdpa.h>
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#define OCTEP_VDPA_DEVID_CN106K_PF 0xb900
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#define OCTEP_VDPA_DEVID_CN106K_VF 0xb903
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#define OCTEP_VDPA_DEVID_CN105K_PF 0xba00
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#define OCTEP_VDPA_DEVID_CN105K_VF 0xba03
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#define OCTEP_VDPA_DEVID_CN103K_PF 0xbd00
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#define OCTEP_VDPA_DEVID_CN103K_VF 0xbd03
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#define OCTEP_HW_MBOX_BAR 0
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#define OCTEP_HW_CAPS_BAR 4
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#define OCTEP_DEV_READY_SIGNATURE 0xBABABABA
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#define OCTEP_EPF_RINFO(x) (0x000209f0 | ((x) << 25))
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#define OCTEP_VF_MBOX_DATA(x) (0x00010210 | ((x) << 17))
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#define OCTEP_PF_MBOX_DATA(x) (0x00022000 | ((x) << 4))
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#define OCTEP_EPF_RINFO_RPVF(val) (((val) >> 32) & 0xF)
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#define OCTEP_EPF_RINFO_NVFS(val) (((val) >> 48) & 0x7F)
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#define OCTEP_FW_READY_SIGNATURE0 0xFEEDFEED
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#define OCTEP_FW_READY_SIGNATURE1 0x3355ffaa
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enum octep_vdpa_dev_status {
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OCTEP_VDPA_DEV_STATUS_INVALID,
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OCTEP_VDPA_DEV_STATUS_ALLOC,
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OCTEP_VDPA_DEV_STATUS_WAIT_FOR_BAR_INIT,
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OCTEP_VDPA_DEV_STATUS_INIT,
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OCTEP_VDPA_DEV_STATUS_READY,
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OCTEP_VDPA_DEV_STATUS_UNINIT
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};
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struct octep_vring_info {
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struct vdpa_callback cb;
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void __iomem *notify_addr;
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u32 __iomem *cb_notify_addr;
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phys_addr_t notify_pa;
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char msix_name[256];
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};
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struct octep_hw {
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struct pci_dev *pdev;
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u8 __iomem *base[PCI_STD_NUM_BARS];
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struct virtio_pci_common_cfg __iomem *common_cfg;
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u8 __iomem *dev_cfg;
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u8 __iomem *isr;
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void __iomem *notify_base;
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phys_addr_t notify_base_pa;
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u32 notify_off_multiplier;
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u8 notify_bar;
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struct octep_vring_info *vqs;
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struct vdpa_callback config_cb;
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u64 features;
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u16 nr_vring;
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u32 config_size;
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int irq;
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};
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u8 octep_hw_get_status(struct octep_hw *oct_hw);
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void octep_hw_set_status(struct octep_hw *dev, uint8_t status);
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void octep_hw_reset(struct octep_hw *oct_hw);
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void octep_write_queue_select(struct octep_hw *oct_hw, u16 queue_id);
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void octep_notify_queue(struct octep_hw *oct_hw, u16 qid);
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void octep_read_dev_config(struct octep_hw *oct_hw, u64 offset, void *dst, int length);
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int octep_set_vq_address(struct octep_hw *oct_hw, u16 qid, u64 desc_area, u64 driver_area,
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u64 device_area);
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void octep_set_vq_num(struct octep_hw *oct_hw, u16 qid, u32 num);
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void octep_set_vq_ready(struct octep_hw *oct_hw, u16 qid, bool ready);
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bool octep_get_vq_ready(struct octep_hw *oct_hw, u16 qid);
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int octep_set_vq_state(struct octep_hw *oct_hw, u16 qid, const struct vdpa_vq_state *state);
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int octep_get_vq_state(struct octep_hw *oct_hw, u16 qid, struct vdpa_vq_state *state);
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u16 octep_get_vq_size(struct octep_hw *oct_hw);
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int octep_hw_caps_read(struct octep_hw *oct_hw, struct pci_dev *pdev);
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u64 octep_hw_get_dev_features(struct octep_hw *oct_hw);
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void octep_hw_set_drv_features(struct octep_hw *oct_hw, u64 features);
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u64 octep_hw_get_drv_features(struct octep_hw *oct_hw);
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int octep_verify_features(u64 features);
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#endif /* __OCTEP_VDPA_H__ */
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517
drivers/vdpa/octeon_ep/octep_vdpa_hw.c
Normal file
517
drivers/vdpa/octeon_ep/octep_vdpa_hw.c
Normal file
@ -0,0 +1,517 @@
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// SPDX-License-Identifier: GPL-2.0-only
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/* Copyright (C) 2024 Marvell. */
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#include <linux/iopoll.h>
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#include "octep_vdpa.h"
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enum octep_mbox_ids {
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OCTEP_MBOX_MSG_SET_VQ_STATE = 1,
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OCTEP_MBOX_MSG_GET_VQ_STATE,
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};
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#define OCTEP_HW_TIMEOUT 10000000
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#define MBOX_OFFSET 64
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#define MBOX_RSP_MASK 0x00000001
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#define MBOX_RC_MASK 0x0000FFFE
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#define MBOX_RSP_TO_ERR(val) (-(((val) & MBOX_RC_MASK) >> 2))
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#define MBOX_AVAIL(val) (((val) & MBOX_RSP_MASK))
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#define MBOX_RSP(val) ((val) & (MBOX_RC_MASK | MBOX_RSP_MASK))
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#define DEV_RST_ACK_BIT 7
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#define FEATURE_SEL_ACK_BIT 15
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#define QUEUE_SEL_ACK_BIT 15
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struct octep_mbox_hdr {
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u8 ver;
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u8 rsvd1;
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u16 id;
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u16 rsvd2;
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#define MBOX_REQ_SIG (0xdead)
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#define MBOX_RSP_SIG (0xbeef)
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u16 sig;
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};
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struct octep_mbox_sts {
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u16 rsp:1;
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u16 rc:15;
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u16 rsvd;
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};
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struct octep_mbox {
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struct octep_mbox_hdr hdr;
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struct octep_mbox_sts sts;
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u64 rsvd;
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u32 data[];
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};
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static inline struct octep_mbox __iomem *octep_get_mbox(struct octep_hw *oct_hw)
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{
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return (struct octep_mbox __iomem *)(oct_hw->dev_cfg + MBOX_OFFSET);
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}
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static inline int octep_wait_for_mbox_avail(struct octep_mbox __iomem *mbox)
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{
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u32 val;
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return readx_poll_timeout(ioread32, &mbox->sts, val, MBOX_AVAIL(val), 10,
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OCTEP_HW_TIMEOUT);
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}
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static inline int octep_wait_for_mbox_rsp(struct octep_mbox __iomem *mbox)
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{
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u32 val;
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return readx_poll_timeout(ioread32, &mbox->sts, val, MBOX_RSP(val), 10,
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OCTEP_HW_TIMEOUT);
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}
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static inline void octep_write_hdr(struct octep_mbox __iomem *mbox, u16 id, u16 sig)
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{
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iowrite16(id, &mbox->hdr.id);
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iowrite16(sig, &mbox->hdr.sig);
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}
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static inline u32 octep_read_sig(struct octep_mbox __iomem *mbox)
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{
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return ioread16(&mbox->hdr.sig);
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}
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static inline void octep_write_sts(struct octep_mbox __iomem *mbox, u32 sts)
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{
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iowrite32(sts, &mbox->sts);
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}
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static inline u32 octep_read_sts(struct octep_mbox __iomem *mbox)
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{
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return ioread32(&mbox->sts);
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}
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static inline u32 octep_read32_word(struct octep_mbox __iomem *mbox, u16 word_idx)
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{
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return ioread32(&mbox->data[word_idx]);
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}
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static inline void octep_write32_word(struct octep_mbox __iomem *mbox, u16 word_idx, u32 word)
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{
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return iowrite32(word, &mbox->data[word_idx]);
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}
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static int octep_process_mbox(struct octep_hw *oct_hw, u16 id, u16 qid, void *buffer,
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u32 buf_size, bool write)
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{
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struct octep_mbox __iomem *mbox = octep_get_mbox(oct_hw);
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struct pci_dev *pdev = oct_hw->pdev;
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u32 *p = (u32 *)buffer;
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u16 data_wds;
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int ret, i;
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u32 val;
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if (!IS_ALIGNED(buf_size, 4))
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return -EINVAL;
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/* Make sure mbox space is available */
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ret = octep_wait_for_mbox_avail(mbox);
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if (ret) {
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dev_warn(&pdev->dev, "Timeout waiting for previous mbox data to be consumed\n");
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return ret;
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}
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data_wds = buf_size / 4;
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if (write) {
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for (i = 1; i <= data_wds; i++) {
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octep_write32_word(mbox, i, *p);
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p++;
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}
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}
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octep_write32_word(mbox, 0, (u32)qid);
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octep_write_sts(mbox, 0);
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octep_write_hdr(mbox, id, MBOX_REQ_SIG);
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ret = octep_wait_for_mbox_rsp(mbox);
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if (ret) {
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dev_warn(&pdev->dev, "Timeout waiting for mbox : %d response\n", id);
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return ret;
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}
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val = octep_read_sig(mbox);
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if ((val & 0xFFFF) != MBOX_RSP_SIG) {
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dev_warn(&pdev->dev, "Invalid Signature from mbox : %d response\n", id);
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return ret;
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}
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val = octep_read_sts(mbox);
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if (val & MBOX_RC_MASK) {
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ret = MBOX_RSP_TO_ERR(val);
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dev_warn(&pdev->dev, "Error while processing mbox : %d, err %d\n", id, ret);
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return ret;
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}
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if (!write)
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for (i = 1; i <= data_wds; i++)
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*p++ = octep_read32_word(mbox, i);
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return 0;
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}
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static void octep_mbox_init(struct octep_mbox __iomem *mbox)
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{
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iowrite32(1, &mbox->sts);
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}
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int octep_verify_features(u64 features)
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{
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/* Minimum features to expect */
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if (!(features & BIT_ULL(VIRTIO_F_VERSION_1)))
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return -EOPNOTSUPP;
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if (!(features & BIT_ULL(VIRTIO_F_NOTIFICATION_DATA)))
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return -EOPNOTSUPP;
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if (!(features & BIT_ULL(VIRTIO_F_RING_PACKED)))
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return -EOPNOTSUPP;
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return 0;
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}
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u8 octep_hw_get_status(struct octep_hw *oct_hw)
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{
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return ioread8(&oct_hw->common_cfg->device_status);
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}
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void octep_hw_set_status(struct octep_hw *oct_hw, u8 status)
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{
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iowrite8(status, &oct_hw->common_cfg->device_status);
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}
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void octep_hw_reset(struct octep_hw *oct_hw)
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{
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u8 val;
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octep_hw_set_status(oct_hw, 0 | BIT(DEV_RST_ACK_BIT));
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if (readx_poll_timeout(ioread8, &oct_hw->common_cfg->device_status, val, !val, 10,
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OCTEP_HW_TIMEOUT)) {
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dev_warn(&oct_hw->pdev->dev, "Octeon device reset timeout\n");
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return;
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}
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}
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static int feature_sel_write_with_timeout(struct octep_hw *oct_hw, u32 select, void __iomem *addr)
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{
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u32 val;
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iowrite32(select | BIT(FEATURE_SEL_ACK_BIT), addr);
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if (readx_poll_timeout(ioread32, addr, val, val == select, 10, OCTEP_HW_TIMEOUT)) {
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dev_warn(&oct_hw->pdev->dev, "Feature select%d write timeout\n", select);
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return -1;
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}
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return 0;
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}
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u64 octep_hw_get_dev_features(struct octep_hw *oct_hw)
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{
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u32 features_lo, features_hi;
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if (feature_sel_write_with_timeout(oct_hw, 0, &oct_hw->common_cfg->device_feature_select))
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return 0;
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features_lo = ioread32(&oct_hw->common_cfg->device_feature);
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if (feature_sel_write_with_timeout(oct_hw, 1, &oct_hw->common_cfg->device_feature_select))
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return 0;
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features_hi = ioread32(&oct_hw->common_cfg->device_feature);
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return ((u64)features_hi << 32) | features_lo;
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}
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u64 octep_hw_get_drv_features(struct octep_hw *oct_hw)
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{
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u32 features_lo, features_hi;
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if (feature_sel_write_with_timeout(oct_hw, 0, &oct_hw->common_cfg->guest_feature_select))
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return 0;
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features_lo = ioread32(&oct_hw->common_cfg->guest_feature);
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if (feature_sel_write_with_timeout(oct_hw, 1, &oct_hw->common_cfg->guest_feature_select))
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return 0;
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features_hi = ioread32(&oct_hw->common_cfg->guest_feature);
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return ((u64)features_hi << 32) | features_lo;
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}
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void octep_hw_set_drv_features(struct octep_hw *oct_hw, u64 features)
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{
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if (feature_sel_write_with_timeout(oct_hw, 0, &oct_hw->common_cfg->guest_feature_select))
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return;
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iowrite32(features & (BIT_ULL(32) - 1), &oct_hw->common_cfg->guest_feature);
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if (feature_sel_write_with_timeout(oct_hw, 1, &oct_hw->common_cfg->guest_feature_select))
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return;
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iowrite32(features >> 32, &oct_hw->common_cfg->guest_feature);
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}
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void octep_write_queue_select(struct octep_hw *oct_hw, u16 queue_id)
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{
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u16 val;
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iowrite16(queue_id | BIT(QUEUE_SEL_ACK_BIT), &oct_hw->common_cfg->queue_select);
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if (readx_poll_timeout(ioread16, &oct_hw->common_cfg->queue_select, val, val == queue_id,
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||||
10, OCTEP_HW_TIMEOUT)) {
|
||||
dev_warn(&oct_hw->pdev->dev, "Queue select write timeout\n");
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
void octep_notify_queue(struct octep_hw *oct_hw, u16 qid)
|
||||
{
|
||||
iowrite16(qid, oct_hw->vqs[qid].notify_addr);
|
||||
}
|
||||
|
||||
void octep_read_dev_config(struct octep_hw *oct_hw, u64 offset, void *dst, int length)
|
||||
{
|
||||
u8 old_gen, new_gen, *p;
|
||||
int i;
|
||||
|
||||
if (WARN_ON(offset + length > oct_hw->config_size))
|
||||
return;
|
||||
|
||||
do {
|
||||
old_gen = ioread8(&oct_hw->common_cfg->config_generation);
|
||||
p = dst;
|
||||
for (i = 0; i < length; i++)
|
||||
*p++ = ioread8(oct_hw->dev_cfg + offset + i);
|
||||
|
||||
new_gen = ioread8(&oct_hw->common_cfg->config_generation);
|
||||
} while (old_gen != new_gen);
|
||||
}
|
||||
|
||||
int octep_set_vq_address(struct octep_hw *oct_hw, u16 qid, u64 desc_area, u64 driver_area,
|
||||
u64 device_area)
|
||||
{
|
||||
struct virtio_pci_common_cfg __iomem *cfg = oct_hw->common_cfg;
|
||||
|
||||
octep_write_queue_select(oct_hw, qid);
|
||||
vp_iowrite64_twopart(desc_area, &cfg->queue_desc_lo,
|
||||
&cfg->queue_desc_hi);
|
||||
vp_iowrite64_twopart(driver_area, &cfg->queue_avail_lo,
|
||||
&cfg->queue_avail_hi);
|
||||
vp_iowrite64_twopart(device_area, &cfg->queue_used_lo,
|
||||
&cfg->queue_used_hi);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int octep_get_vq_state(struct octep_hw *oct_hw, u16 qid, struct vdpa_vq_state *state)
|
||||
{
|
||||
return octep_process_mbox(oct_hw, OCTEP_MBOX_MSG_GET_VQ_STATE, qid, state,
|
||||
sizeof(*state), 0);
|
||||
}
|
||||
|
||||
int octep_set_vq_state(struct octep_hw *oct_hw, u16 qid, const struct vdpa_vq_state *state)
|
||||
{
|
||||
struct vdpa_vq_state q_state;
|
||||
|
||||
memcpy(&q_state, state, sizeof(struct vdpa_vq_state));
|
||||
return octep_process_mbox(oct_hw, OCTEP_MBOX_MSG_SET_VQ_STATE, qid, &q_state,
|
||||
sizeof(*state), 1);
|
||||
}
|
||||
|
||||
void octep_set_vq_num(struct octep_hw *oct_hw, u16 qid, u32 num)
|
||||
{
|
||||
struct virtio_pci_common_cfg __iomem *cfg = oct_hw->common_cfg;
|
||||
|
||||
octep_write_queue_select(oct_hw, qid);
|
||||
iowrite16(num, &cfg->queue_size);
|
||||
}
|
||||
|
||||
void octep_set_vq_ready(struct octep_hw *oct_hw, u16 qid, bool ready)
|
||||
{
|
||||
struct virtio_pci_common_cfg __iomem *cfg = oct_hw->common_cfg;
|
||||
|
||||
octep_write_queue_select(oct_hw, qid);
|
||||
iowrite16(ready, &cfg->queue_enable);
|
||||
}
|
||||
|
||||
bool octep_get_vq_ready(struct octep_hw *oct_hw, u16 qid)
|
||||
{
|
||||
struct virtio_pci_common_cfg __iomem *cfg = oct_hw->common_cfg;
|
||||
|
||||
octep_write_queue_select(oct_hw, qid);
|
||||
return ioread16(&cfg->queue_enable);
|
||||
}
|
||||
|
||||
u16 octep_get_vq_size(struct octep_hw *oct_hw)
|
||||
{
|
||||
octep_write_queue_select(oct_hw, 0);
|
||||
return ioread16(&oct_hw->common_cfg->queue_size);
|
||||
}
|
||||
|
||||
static u32 octep_get_config_size(struct octep_hw *oct_hw)
|
||||
{
|
||||
return sizeof(struct virtio_net_config);
|
||||
}
|
||||
|
||||
static void __iomem *octep_get_cap_addr(struct octep_hw *oct_hw, struct virtio_pci_cap *cap)
|
||||
{
|
||||
struct device *dev = &oct_hw->pdev->dev;
|
||||
u32 length = le32_to_cpu(cap->length);
|
||||
u32 offset = le32_to_cpu(cap->offset);
|
||||
u8 bar = cap->bar;
|
||||
u32 len;
|
||||
|
||||
if (bar != OCTEP_HW_CAPS_BAR) {
|
||||
dev_err(dev, "Invalid bar: %u\n", bar);
|
||||
return NULL;
|
||||
}
|
||||
if (offset + length < offset) {
|
||||
dev_err(dev, "offset(%u) + length(%u) overflows\n",
|
||||
offset, length);
|
||||
return NULL;
|
||||
}
|
||||
len = pci_resource_len(oct_hw->pdev, bar);
|
||||
if (offset + length > len) {
|
||||
dev_err(dev, "invalid cap: overflows bar space: %u > %u\n",
|
||||
offset + length, len);
|
||||
return NULL;
|
||||
}
|
||||
return oct_hw->base[bar] + offset;
|
||||
}
|
||||
|
||||
/* In Octeon DPU device, the virtio config space is completely
|
||||
* emulated by the device's firmware. So, the standard pci config
|
||||
* read apis can't be used for reading the virtio capability.
|
||||
*/
|
||||
static void octep_pci_caps_read(struct octep_hw *oct_hw, void *buf, size_t len, off_t offset)
|
||||
{
|
||||
u8 __iomem *bar = oct_hw->base[OCTEP_HW_CAPS_BAR];
|
||||
u8 *p = buf;
|
||||
size_t i;
|
||||
|
||||
for (i = 0; i < len; i++)
|
||||
*p++ = ioread8(bar + offset + i);
|
||||
}
|
||||
|
||||
static int octep_pci_signature_verify(struct octep_hw *oct_hw)
|
||||
{
|
||||
u32 signature[2];
|
||||
|
||||
octep_pci_caps_read(oct_hw, &signature, sizeof(signature), 0);
|
||||
|
||||
if (signature[0] != OCTEP_FW_READY_SIGNATURE0)
|
||||
return -1;
|
||||
|
||||
if (signature[1] != OCTEP_FW_READY_SIGNATURE1)
|
||||
return -1;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int octep_hw_caps_read(struct octep_hw *oct_hw, struct pci_dev *pdev)
|
||||
{
|
||||
struct octep_mbox __iomem *mbox;
|
||||
struct device *dev = &pdev->dev;
|
||||
struct virtio_pci_cap cap;
|
||||
u16 notify_off;
|
||||
int i, ret;
|
||||
u8 pos;
|
||||
|
||||
oct_hw->pdev = pdev;
|
||||
ret = octep_pci_signature_verify(oct_hw);
|
||||
if (ret) {
|
||||
dev_err(dev, "Octeon Virtio FW is not initialized\n");
|
||||
return -EIO;
|
||||
}
|
||||
|
||||
octep_pci_caps_read(oct_hw, &pos, 1, PCI_CAPABILITY_LIST);
|
||||
|
||||
while (pos) {
|
||||
octep_pci_caps_read(oct_hw, &cap, 2, pos);
|
||||
|
||||
if (cap.cap_vndr != PCI_CAP_ID_VNDR) {
|
||||
dev_err(dev, "Found invalid capability vndr id: %d\n", cap.cap_vndr);
|
||||
break;
|
||||
}
|
||||
|
||||
octep_pci_caps_read(oct_hw, &cap, sizeof(cap), pos);
|
||||
|
||||
dev_info(dev, "[%2x] cfg type: %u, bar: %u, offset: %04x, len: %u\n",
|
||||
pos, cap.cfg_type, cap.bar, cap.offset, cap.length);
|
||||
|
||||
switch (cap.cfg_type) {
|
||||
case VIRTIO_PCI_CAP_COMMON_CFG:
|
||||
oct_hw->common_cfg = octep_get_cap_addr(oct_hw, &cap);
|
||||
break;
|
||||
case VIRTIO_PCI_CAP_NOTIFY_CFG:
|
||||
octep_pci_caps_read(oct_hw, &oct_hw->notify_off_multiplier,
|
||||
4, pos + sizeof(cap));
|
||||
|
||||
oct_hw->notify_base = octep_get_cap_addr(oct_hw, &cap);
|
||||
oct_hw->notify_bar = cap.bar;
|
||||
oct_hw->notify_base_pa = pci_resource_start(pdev, cap.bar) +
|
||||
le32_to_cpu(cap.offset);
|
||||
break;
|
||||
case VIRTIO_PCI_CAP_DEVICE_CFG:
|
||||
oct_hw->dev_cfg = octep_get_cap_addr(oct_hw, &cap);
|
||||
break;
|
||||
case VIRTIO_PCI_CAP_ISR_CFG:
|
||||
oct_hw->isr = octep_get_cap_addr(oct_hw, &cap);
|
||||
break;
|
||||
}
|
||||
|
||||
pos = cap.cap_next;
|
||||
}
|
||||
if (!oct_hw->common_cfg || !oct_hw->notify_base ||
|
||||
!oct_hw->dev_cfg || !oct_hw->isr) {
|
||||
dev_err(dev, "Incomplete PCI capabilities");
|
||||
return -EIO;
|
||||
}
|
||||
dev_info(dev, "common cfg mapped at: 0x%016llx\n", (u64)(uintptr_t)oct_hw->common_cfg);
|
||||
dev_info(dev, "device cfg mapped at: 0x%016llx\n", (u64)(uintptr_t)oct_hw->dev_cfg);
|
||||
dev_info(dev, "isr cfg mapped at: 0x%016llx\n", (u64)(uintptr_t)oct_hw->isr);
|
||||
dev_info(dev, "notify base: 0x%016llx, notify off multiplier: %u\n",
|
||||
(u64)(uintptr_t)oct_hw->notify_base, oct_hw->notify_off_multiplier);
|
||||
|
||||
oct_hw->config_size = octep_get_config_size(oct_hw);
|
||||
oct_hw->features = octep_hw_get_dev_features(oct_hw);
|
||||
|
||||
ret = octep_verify_features(oct_hw->features);
|
||||
if (ret) {
|
||||
dev_err(&pdev->dev, "Couldn't read features from the device FW\n");
|
||||
return ret;
|
||||
}
|
||||
oct_hw->nr_vring = vp_ioread16(&oct_hw->common_cfg->num_queues);
|
||||
|
||||
oct_hw->vqs = devm_kcalloc(&pdev->dev, oct_hw->nr_vring, sizeof(*oct_hw->vqs), GFP_KERNEL);
|
||||
if (!oct_hw->vqs)
|
||||
return -ENOMEM;
|
||||
|
||||
oct_hw->irq = -1;
|
||||
|
||||
dev_info(&pdev->dev, "Device features : %llx\n", oct_hw->features);
|
||||
dev_info(&pdev->dev, "Maximum queues : %u\n", oct_hw->nr_vring);
|
||||
|
||||
for (i = 0; i < oct_hw->nr_vring; i++) {
|
||||
octep_write_queue_select(oct_hw, i);
|
||||
notify_off = vp_ioread16(&oct_hw->common_cfg->queue_notify_off);
|
||||
oct_hw->vqs[i].notify_addr = oct_hw->notify_base +
|
||||
notify_off * oct_hw->notify_off_multiplier;
|
||||
oct_hw->vqs[i].cb_notify_addr = (u32 __iomem *)oct_hw->vqs[i].notify_addr + 1;
|
||||
oct_hw->vqs[i].notify_pa = oct_hw->notify_base_pa +
|
||||
notify_off * oct_hw->notify_off_multiplier;
|
||||
}
|
||||
mbox = octep_get_mbox(oct_hw);
|
||||
octep_mbox_init(mbox);
|
||||
dev_info(dev, "mbox mapped at: 0x%016llx\n", (u64)(uintptr_t)mbox);
|
||||
|
||||
return 0;
|
||||
}
|
||||
857
drivers/vdpa/octeon_ep/octep_vdpa_main.c
Normal file
857
drivers/vdpa/octeon_ep/octep_vdpa_main.c
Normal file
@ -0,0 +1,857 @@
|
||||
// SPDX-License-Identifier: GPL-2.0-only
|
||||
/* Copyright (C) 2024 Marvell. */
|
||||
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/io-64-nonatomic-lo-hi.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/iommu.h>
|
||||
#include "octep_vdpa.h"
|
||||
|
||||
#define OCTEP_VDPA_DRIVER_NAME "octep_vdpa"
|
||||
|
||||
struct octep_pf {
|
||||
u8 __iomem *base[PCI_STD_NUM_BARS];
|
||||
struct pci_dev *pdev;
|
||||
struct resource res;
|
||||
u64 vf_base;
|
||||
int enabled_vfs;
|
||||
u32 vf_stride;
|
||||
u16 vf_devid;
|
||||
};
|
||||
|
||||
struct octep_vdpa {
|
||||
struct vdpa_device vdpa;
|
||||
struct octep_hw *oct_hw;
|
||||
struct pci_dev *pdev;
|
||||
};
|
||||
|
||||
struct octep_vdpa_mgmt_dev {
|
||||
struct vdpa_mgmt_dev mdev;
|
||||
struct octep_hw oct_hw;
|
||||
struct pci_dev *pdev;
|
||||
/* Work entry to handle device setup */
|
||||
struct work_struct setup_task;
|
||||
/* Device status */
|
||||
atomic_t status;
|
||||
};
|
||||
|
||||
static struct octep_hw *vdpa_to_octep_hw(struct vdpa_device *vdpa_dev)
|
||||
{
|
||||
struct octep_vdpa *oct_vdpa;
|
||||
|
||||
oct_vdpa = container_of(vdpa_dev, struct octep_vdpa, vdpa);
|
||||
|
||||
return oct_vdpa->oct_hw;
|
||||
}
|
||||
|
||||
static irqreturn_t octep_vdpa_intr_handler(int irq, void *data)
|
||||
{
|
||||
struct octep_hw *oct_hw = data;
|
||||
int i;
|
||||
|
||||
for (i = 0; i < oct_hw->nr_vring; i++) {
|
||||
if (oct_hw->vqs[i].cb.callback && ioread32(oct_hw->vqs[i].cb_notify_addr)) {
|
||||
/* Acknowledge the per queue notification to the device */
|
||||
iowrite32(0, oct_hw->vqs[i].cb_notify_addr);
|
||||
oct_hw->vqs[i].cb.callback(oct_hw->vqs[i].cb.private);
|
||||
}
|
||||
}
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static void octep_free_irqs(struct octep_hw *oct_hw)
|
||||
{
|
||||
struct pci_dev *pdev = oct_hw->pdev;
|
||||
|
||||
if (oct_hw->irq != -1) {
|
||||
devm_free_irq(&pdev->dev, oct_hw->irq, oct_hw);
|
||||
oct_hw->irq = -1;
|
||||
}
|
||||
pci_free_irq_vectors(pdev);
|
||||
}
|
||||
|
||||
static int octep_request_irqs(struct octep_hw *oct_hw)
|
||||
{
|
||||
struct pci_dev *pdev = oct_hw->pdev;
|
||||
int ret, irq;
|
||||
|
||||
/* Currently HW device provisions one IRQ per VF, hence
|
||||
* allocate one IRQ for all virtqueues call interface.
|
||||
*/
|
||||
ret = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_MSIX);
|
||||
if (ret < 0) {
|
||||
dev_err(&pdev->dev, "Failed to alloc msix vector");
|
||||
return ret;
|
||||
}
|
||||
|
||||
snprintf(oct_hw->vqs->msix_name, sizeof(oct_hw->vqs->msix_name),
|
||||
OCTEP_VDPA_DRIVER_NAME "-vf-%d", pci_iov_vf_id(pdev));
|
||||
|
||||
irq = pci_irq_vector(pdev, 0);
|
||||
ret = devm_request_irq(&pdev->dev, irq, octep_vdpa_intr_handler, 0,
|
||||
oct_hw->vqs->msix_name, oct_hw);
|
||||
if (ret) {
|
||||
dev_err(&pdev->dev, "Failed to register interrupt handler\n");
|
||||
goto free_irq_vec;
|
||||
}
|
||||
oct_hw->irq = irq;
|
||||
|
||||
return 0;
|
||||
|
||||
free_irq_vec:
|
||||
pci_free_irq_vectors(pdev);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static u64 octep_vdpa_get_device_features(struct vdpa_device *vdpa_dev)
|
||||
{
|
||||
struct octep_hw *oct_hw = vdpa_to_octep_hw(vdpa_dev);
|
||||
|
||||
return oct_hw->features;
|
||||
}
|
||||
|
||||
static int octep_vdpa_set_driver_features(struct vdpa_device *vdpa_dev, u64 features)
|
||||
{
|
||||
struct octep_hw *oct_hw = vdpa_to_octep_hw(vdpa_dev);
|
||||
int ret;
|
||||
|
||||
pr_debug("Driver Features: %llx\n", features);
|
||||
|
||||
ret = octep_verify_features(features);
|
||||
if (ret) {
|
||||
dev_warn(&oct_hw->pdev->dev,
|
||||
"Must negotiate minimum features 0x%llx for this device",
|
||||
BIT_ULL(VIRTIO_F_VERSION_1) | BIT_ULL(VIRTIO_F_NOTIFICATION_DATA) |
|
||||
BIT_ULL(VIRTIO_F_RING_PACKED));
|
||||
return ret;
|
||||
}
|
||||
octep_hw_set_drv_features(oct_hw, features);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static u64 octep_vdpa_get_driver_features(struct vdpa_device *vdpa_dev)
|
||||
{
|
||||
struct octep_hw *oct_hw = vdpa_to_octep_hw(vdpa_dev);
|
||||
|
||||
return octep_hw_get_drv_features(oct_hw);
|
||||
}
|
||||
|
||||
static u8 octep_vdpa_get_status(struct vdpa_device *vdpa_dev)
|
||||
{
|
||||
struct octep_hw *oct_hw = vdpa_to_octep_hw(vdpa_dev);
|
||||
|
||||
return octep_hw_get_status(oct_hw);
|
||||
}
|
||||
|
||||
static void octep_vdpa_set_status(struct vdpa_device *vdpa_dev, u8 status)
|
||||
{
|
||||
struct octep_hw *oct_hw = vdpa_to_octep_hw(vdpa_dev);
|
||||
u8 status_old;
|
||||
|
||||
status_old = octep_hw_get_status(oct_hw);
|
||||
|
||||
if (status_old == status)
|
||||
return;
|
||||
|
||||
if ((status & VIRTIO_CONFIG_S_DRIVER_OK) &&
|
||||
!(status_old & VIRTIO_CONFIG_S_DRIVER_OK)) {
|
||||
if (octep_request_irqs(oct_hw))
|
||||
status = status_old | VIRTIO_CONFIG_S_FAILED;
|
||||
}
|
||||
octep_hw_set_status(oct_hw, status);
|
||||
}
|
||||
|
||||
static int octep_vdpa_reset(struct vdpa_device *vdpa_dev)
|
||||
{
|
||||
struct octep_hw *oct_hw = vdpa_to_octep_hw(vdpa_dev);
|
||||
u8 status = octep_hw_get_status(oct_hw);
|
||||
u16 qid;
|
||||
|
||||
if (status == 0)
|
||||
return 0;
|
||||
|
||||
for (qid = 0; qid < oct_hw->nr_vring; qid++) {
|
||||
oct_hw->vqs[qid].cb.callback = NULL;
|
||||
oct_hw->vqs[qid].cb.private = NULL;
|
||||
oct_hw->config_cb.callback = NULL;
|
||||
oct_hw->config_cb.private = NULL;
|
||||
}
|
||||
octep_hw_reset(oct_hw);
|
||||
|
||||
if (status & VIRTIO_CONFIG_S_DRIVER_OK)
|
||||
octep_free_irqs(oct_hw);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static u16 octep_vdpa_get_vq_num_max(struct vdpa_device *vdpa_dev)
|
||||
{
|
||||
struct octep_hw *oct_hw = vdpa_to_octep_hw(vdpa_dev);
|
||||
|
||||
return octep_get_vq_size(oct_hw);
|
||||
}
|
||||
|
||||
static int octep_vdpa_get_vq_state(struct vdpa_device *vdpa_dev, u16 qid,
|
||||
struct vdpa_vq_state *state)
|
||||
{
|
||||
struct octep_hw *oct_hw = vdpa_to_octep_hw(vdpa_dev);
|
||||
|
||||
return octep_get_vq_state(oct_hw, qid, state);
|
||||
}
|
||||
|
||||
static int octep_vdpa_set_vq_state(struct vdpa_device *vdpa_dev, u16 qid,
|
||||
const struct vdpa_vq_state *state)
|
||||
{
|
||||
struct octep_hw *oct_hw = vdpa_to_octep_hw(vdpa_dev);
|
||||
|
||||
return octep_set_vq_state(oct_hw, qid, state);
|
||||
}
|
||||
|
||||
static void octep_vdpa_set_vq_cb(struct vdpa_device *vdpa_dev, u16 qid, struct vdpa_callback *cb)
|
||||
{
|
||||
struct octep_hw *oct_hw = vdpa_to_octep_hw(vdpa_dev);
|
||||
|
||||
oct_hw->vqs[qid].cb = *cb;
|
||||
}
|
||||
|
||||
static void octep_vdpa_set_vq_ready(struct vdpa_device *vdpa_dev, u16 qid, bool ready)
|
||||
{
|
||||
struct octep_hw *oct_hw = vdpa_to_octep_hw(vdpa_dev);
|
||||
|
||||
octep_set_vq_ready(oct_hw, qid, ready);
|
||||
}
|
||||
|
||||
static bool octep_vdpa_get_vq_ready(struct vdpa_device *vdpa_dev, u16 qid)
|
||||
{
|
||||
struct octep_hw *oct_hw = vdpa_to_octep_hw(vdpa_dev);
|
||||
|
||||
return octep_get_vq_ready(oct_hw, qid);
|
||||
}
|
||||
|
||||
static void octep_vdpa_set_vq_num(struct vdpa_device *vdpa_dev, u16 qid, u32 num)
|
||||
{
|
||||
struct octep_hw *oct_hw = vdpa_to_octep_hw(vdpa_dev);
|
||||
|
||||
octep_set_vq_num(oct_hw, qid, num);
|
||||
}
|
||||
|
||||
static int octep_vdpa_set_vq_address(struct vdpa_device *vdpa_dev, u16 qid, u64 desc_area,
|
||||
u64 driver_area, u64 device_area)
|
||||
{
|
||||
struct octep_hw *oct_hw = vdpa_to_octep_hw(vdpa_dev);
|
||||
|
||||
pr_debug("qid[%d]: desc_area: %llx\n", qid, desc_area);
|
||||
pr_debug("qid[%d]: driver_area: %llx\n", qid, driver_area);
|
||||
pr_debug("qid[%d]: device_area: %llx\n\n", qid, device_area);
|
||||
|
||||
return octep_set_vq_address(oct_hw, qid, desc_area, driver_area, device_area);
|
||||
}
|
||||
|
||||
static void octep_vdpa_kick_vq(struct vdpa_device *vdpa_dev, u16 qid)
|
||||
{
|
||||
/* Not supported */
|
||||
}
|
||||
|
||||
static void octep_vdpa_kick_vq_with_data(struct vdpa_device *vdpa_dev, u32 data)
|
||||
{
|
||||
struct octep_hw *oct_hw = vdpa_to_octep_hw(vdpa_dev);
|
||||
u16 idx = data & 0xFFFF;
|
||||
|
||||
vp_iowrite32(data, oct_hw->vqs[idx].notify_addr);
|
||||
}
|
||||
|
||||
static u32 octep_vdpa_get_generation(struct vdpa_device *vdpa_dev)
|
||||
{
|
||||
struct octep_hw *oct_hw = vdpa_to_octep_hw(vdpa_dev);
|
||||
|
||||
return vp_ioread8(&oct_hw->common_cfg->config_generation);
|
||||
}
|
||||
|
||||
static u32 octep_vdpa_get_device_id(struct vdpa_device *vdpa_dev)
|
||||
{
|
||||
return VIRTIO_ID_NET;
|
||||
}
|
||||
|
||||
static u32 octep_vdpa_get_vendor_id(struct vdpa_device *vdpa_dev)
|
||||
{
|
||||
return PCI_VENDOR_ID_CAVIUM;
|
||||
}
|
||||
|
||||
static u32 octep_vdpa_get_vq_align(struct vdpa_device *vdpa_dev)
|
||||
{
|
||||
return PAGE_SIZE;
|
||||
}
|
||||
|
||||
static size_t octep_vdpa_get_config_size(struct vdpa_device *vdpa_dev)
|
||||
{
|
||||
struct octep_hw *oct_hw = vdpa_to_octep_hw(vdpa_dev);
|
||||
|
||||
return oct_hw->config_size;
|
||||
}
|
||||
|
||||
static void octep_vdpa_get_config(struct vdpa_device *vdpa_dev, unsigned int offset, void *buf,
|
||||
unsigned int len)
|
||||
{
|
||||
struct octep_hw *oct_hw = vdpa_to_octep_hw(vdpa_dev);
|
||||
|
||||
octep_read_dev_config(oct_hw, offset, buf, len);
|
||||
}
|
||||
|
||||
static void octep_vdpa_set_config(struct vdpa_device *vdpa_dev, unsigned int offset,
|
||||
const void *buf, unsigned int len)
|
||||
{
|
||||
/* Not supported */
|
||||
}
|
||||
|
||||
static void octep_vdpa_set_config_cb(struct vdpa_device *vdpa_dev, struct vdpa_callback *cb)
|
||||
{
|
||||
struct octep_hw *oct_hw = vdpa_to_octep_hw(vdpa_dev);
|
||||
|
||||
oct_hw->config_cb.callback = cb->callback;
|
||||
oct_hw->config_cb.private = cb->private;
|
||||
}
|
||||
|
||||
static struct vdpa_notification_area octep_get_vq_notification(struct vdpa_device *vdpa_dev,
|
||||
u16 idx)
|
||||
{
|
||||
struct octep_hw *oct_hw = vdpa_to_octep_hw(vdpa_dev);
|
||||
struct vdpa_notification_area area;
|
||||
|
||||
area.addr = oct_hw->vqs[idx].notify_pa;
|
||||
area.size = PAGE_SIZE;
|
||||
|
||||
return area;
|
||||
}
|
||||
|
||||
static struct vdpa_config_ops octep_vdpa_ops = {
|
||||
.get_device_features = octep_vdpa_get_device_features,
|
||||
.set_driver_features = octep_vdpa_set_driver_features,
|
||||
.get_driver_features = octep_vdpa_get_driver_features,
|
||||
.get_status = octep_vdpa_get_status,
|
||||
.set_status = octep_vdpa_set_status,
|
||||
.reset = octep_vdpa_reset,
|
||||
.get_vq_num_max = octep_vdpa_get_vq_num_max,
|
||||
.get_vq_state = octep_vdpa_get_vq_state,
|
||||
.set_vq_state = octep_vdpa_set_vq_state,
|
||||
.set_vq_cb = octep_vdpa_set_vq_cb,
|
||||
.set_vq_ready = octep_vdpa_set_vq_ready,
|
||||
.get_vq_ready = octep_vdpa_get_vq_ready,
|
||||
.set_vq_num = octep_vdpa_set_vq_num,
|
||||
.set_vq_address = octep_vdpa_set_vq_address,
|
||||
.get_vq_irq = NULL,
|
||||
.kick_vq = octep_vdpa_kick_vq,
|
||||
.kick_vq_with_data = octep_vdpa_kick_vq_with_data,
|
||||
.get_generation = octep_vdpa_get_generation,
|
||||
.get_device_id = octep_vdpa_get_device_id,
|
||||
.get_vendor_id = octep_vdpa_get_vendor_id,
|
||||
.get_vq_align = octep_vdpa_get_vq_align,
|
||||
.get_config_size = octep_vdpa_get_config_size,
|
||||
.get_config = octep_vdpa_get_config,
|
||||
.set_config = octep_vdpa_set_config,
|
||||
.set_config_cb = octep_vdpa_set_config_cb,
|
||||
.get_vq_notification = octep_get_vq_notification,
|
||||
};
|
||||
|
||||
static int octep_iomap_region(struct pci_dev *pdev, u8 __iomem **tbl, u8 bar)
|
||||
{
|
||||
int ret;
|
||||
|
||||
ret = pci_request_region(pdev, bar, OCTEP_VDPA_DRIVER_NAME);
|
||||
if (ret) {
|
||||
dev_err(&pdev->dev, "Failed to request BAR:%u region\n", bar);
|
||||
return ret;
|
||||
}
|
||||
|
||||
tbl[bar] = pci_iomap(pdev, bar, pci_resource_len(pdev, bar));
|
||||
if (!tbl[bar]) {
|
||||
dev_err(&pdev->dev, "Failed to iomap BAR:%u\n", bar);
|
||||
pci_release_region(pdev, bar);
|
||||
ret = -ENOMEM;
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void octep_iounmap_region(struct pci_dev *pdev, u8 __iomem **tbl, u8 bar)
|
||||
{
|
||||
pci_iounmap(pdev, tbl[bar]);
|
||||
pci_release_region(pdev, bar);
|
||||
}
|
||||
|
||||
static void octep_vdpa_pf_bar_shrink(struct octep_pf *octpf)
|
||||
{
|
||||
struct pci_dev *pf_dev = octpf->pdev;
|
||||
struct resource *res = pf_dev->resource + PCI_STD_RESOURCES + 4;
|
||||
struct pci_bus_region bus_region;
|
||||
|
||||
octpf->res.start = res->start;
|
||||
octpf->res.end = res->end;
|
||||
octpf->vf_base = res->start;
|
||||
|
||||
bus_region.start = res->start;
|
||||
bus_region.end = res->start - 1;
|
||||
|
||||
pcibios_bus_to_resource(pf_dev->bus, res, &bus_region);
|
||||
}
|
||||
|
||||
static void octep_vdpa_pf_bar_expand(struct octep_pf *octpf)
|
||||
{
|
||||
struct pci_dev *pf_dev = octpf->pdev;
|
||||
struct resource *res = pf_dev->resource + PCI_STD_RESOURCES + 4;
|
||||
struct pci_bus_region bus_region;
|
||||
|
||||
bus_region.start = octpf->res.start;
|
||||
bus_region.end = octpf->res.end;
|
||||
|
||||
pcibios_bus_to_resource(pf_dev->bus, res, &bus_region);
|
||||
}
|
||||
|
||||
static void octep_vdpa_remove_pf(struct pci_dev *pdev)
|
||||
{
|
||||
struct octep_pf *octpf = pci_get_drvdata(pdev);
|
||||
|
||||
pci_disable_sriov(pdev);
|
||||
|
||||
if (octpf->base[OCTEP_HW_CAPS_BAR])
|
||||
octep_iounmap_region(pdev, octpf->base, OCTEP_HW_CAPS_BAR);
|
||||
|
||||
if (octpf->base[OCTEP_HW_MBOX_BAR])
|
||||
octep_iounmap_region(pdev, octpf->base, OCTEP_HW_MBOX_BAR);
|
||||
|
||||
octep_vdpa_pf_bar_expand(octpf);
|
||||
}
|
||||
|
||||
static void octep_vdpa_vf_bar_shrink(struct pci_dev *pdev)
|
||||
{
|
||||
struct resource *vf_res = pdev->resource + PCI_STD_RESOURCES + 4;
|
||||
|
||||
memset(vf_res, 0, sizeof(*vf_res));
|
||||
}
|
||||
|
||||
static void octep_vdpa_remove_vf(struct pci_dev *pdev)
|
||||
{
|
||||
struct octep_vdpa_mgmt_dev *mgmt_dev = pci_get_drvdata(pdev);
|
||||
struct octep_hw *oct_hw;
|
||||
int status;
|
||||
|
||||
oct_hw = &mgmt_dev->oct_hw;
|
||||
status = atomic_read(&mgmt_dev->status);
|
||||
atomic_set(&mgmt_dev->status, OCTEP_VDPA_DEV_STATUS_UNINIT);
|
||||
|
||||
cancel_work_sync(&mgmt_dev->setup_task);
|
||||
if (status == OCTEP_VDPA_DEV_STATUS_READY)
|
||||
vdpa_mgmtdev_unregister(&mgmt_dev->mdev);
|
||||
|
||||
if (oct_hw->base[OCTEP_HW_CAPS_BAR])
|
||||
octep_iounmap_region(pdev, oct_hw->base, OCTEP_HW_CAPS_BAR);
|
||||
|
||||
if (oct_hw->base[OCTEP_HW_MBOX_BAR])
|
||||
octep_iounmap_region(pdev, oct_hw->base, OCTEP_HW_MBOX_BAR);
|
||||
|
||||
octep_vdpa_vf_bar_shrink(pdev);
|
||||
}
|
||||
|
||||
static void octep_vdpa_remove(struct pci_dev *pdev)
|
||||
{
|
||||
if (pdev->is_virtfn)
|
||||
octep_vdpa_remove_vf(pdev);
|
||||
else
|
||||
octep_vdpa_remove_pf(pdev);
|
||||
}
|
||||
|
||||
static int octep_vdpa_dev_add(struct vdpa_mgmt_dev *mdev, const char *name,
|
||||
const struct vdpa_dev_set_config *config)
|
||||
{
|
||||
struct octep_vdpa_mgmt_dev *mgmt_dev = container_of(mdev, struct octep_vdpa_mgmt_dev, mdev);
|
||||
struct octep_hw *oct_hw = &mgmt_dev->oct_hw;
|
||||
struct pci_dev *pdev = oct_hw->pdev;
|
||||
struct vdpa_device *vdpa_dev;
|
||||
struct octep_vdpa *oct_vdpa;
|
||||
u64 device_features;
|
||||
int ret;
|
||||
|
||||
oct_vdpa = vdpa_alloc_device(struct octep_vdpa, vdpa, &pdev->dev, &octep_vdpa_ops, 1, 1,
|
||||
NULL, false);
|
||||
if (IS_ERR(oct_vdpa)) {
|
||||
dev_err(&pdev->dev, "Failed to allocate vDPA structure for octep vdpa device");
|
||||
return PTR_ERR(oct_vdpa);
|
||||
}
|
||||
|
||||
oct_vdpa->pdev = pdev;
|
||||
oct_vdpa->vdpa.dma_dev = &pdev->dev;
|
||||
oct_vdpa->vdpa.mdev = mdev;
|
||||
oct_vdpa->oct_hw = oct_hw;
|
||||
vdpa_dev = &oct_vdpa->vdpa;
|
||||
|
||||
device_features = oct_hw->features;
|
||||
if (config->mask & BIT_ULL(VDPA_ATTR_DEV_FEATURES)) {
|
||||
if (config->device_features & ~device_features) {
|
||||
dev_err(&pdev->dev, "The provisioned features 0x%llx are not supported by this device with features 0x%llx\n",
|
||||
config->device_features, device_features);
|
||||
ret = -EINVAL;
|
||||
goto vdpa_dev_put;
|
||||
}
|
||||
device_features &= config->device_features;
|
||||
}
|
||||
|
||||
oct_hw->features = device_features;
|
||||
dev_info(&pdev->dev, "Vdpa management device features : %llx\n", device_features);
|
||||
|
||||
ret = octep_verify_features(device_features);
|
||||
if (ret) {
|
||||
dev_warn(mdev->device,
|
||||
"Must provision minimum features 0x%llx for this device",
|
||||
BIT_ULL(VIRTIO_F_VERSION_1) | BIT_ULL(VIRTIO_F_ACCESS_PLATFORM) |
|
||||
BIT_ULL(VIRTIO_F_NOTIFICATION_DATA) | BIT_ULL(VIRTIO_F_RING_PACKED));
|
||||
goto vdpa_dev_put;
|
||||
}
|
||||
if (name)
|
||||
ret = dev_set_name(&vdpa_dev->dev, "%s", name);
|
||||
else
|
||||
ret = dev_set_name(&vdpa_dev->dev, "vdpa%u", vdpa_dev->index);
|
||||
|
||||
ret = _vdpa_register_device(&oct_vdpa->vdpa, oct_hw->nr_vring);
|
||||
if (ret) {
|
||||
dev_err(&pdev->dev, "Failed to register to vDPA bus");
|
||||
goto vdpa_dev_put;
|
||||
}
|
||||
return 0;
|
||||
|
||||
vdpa_dev_put:
|
||||
put_device(&oct_vdpa->vdpa.dev);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void octep_vdpa_dev_del(struct vdpa_mgmt_dev *mdev, struct vdpa_device *vdpa_dev)
|
||||
{
|
||||
_vdpa_unregister_device(vdpa_dev);
|
||||
}
|
||||
|
||||
static const struct vdpa_mgmtdev_ops octep_vdpa_mgmt_dev_ops = {
|
||||
.dev_add = octep_vdpa_dev_add,
|
||||
.dev_del = octep_vdpa_dev_del
|
||||
};
|
||||
|
||||
static bool get_device_ready_status(u8 __iomem *addr)
|
||||
{
|
||||
u64 signature = readq(addr + OCTEP_VF_MBOX_DATA(0));
|
||||
|
||||
if (signature == OCTEP_DEV_READY_SIGNATURE) {
|
||||
writeq(0, addr + OCTEP_VF_MBOX_DATA(0));
|
||||
return true;
|
||||
}
|
||||
|
||||
return false;
|
||||
}
|
||||
|
||||
static struct virtio_device_id id_table[] = {
|
||||
{ VIRTIO_ID_NET, VIRTIO_DEV_ANY_ID },
|
||||
{ 0 },
|
||||
};
|
||||
|
||||
static void octep_vdpa_setup_task(struct work_struct *work)
|
||||
{
|
||||
struct octep_vdpa_mgmt_dev *mgmt_dev = container_of(work, struct octep_vdpa_mgmt_dev,
|
||||
setup_task);
|
||||
struct pci_dev *pdev = mgmt_dev->pdev;
|
||||
struct device *dev = &pdev->dev;
|
||||
struct octep_hw *oct_hw;
|
||||
unsigned long timeout;
|
||||
int ret;
|
||||
|
||||
oct_hw = &mgmt_dev->oct_hw;
|
||||
|
||||
atomic_set(&mgmt_dev->status, OCTEP_VDPA_DEV_STATUS_WAIT_FOR_BAR_INIT);
|
||||
|
||||
/* Wait for a maximum of 5 sec */
|
||||
timeout = jiffies + msecs_to_jiffies(5000);
|
||||
while (!time_after(jiffies, timeout)) {
|
||||
if (get_device_ready_status(oct_hw->base[OCTEP_HW_MBOX_BAR])) {
|
||||
atomic_set(&mgmt_dev->status, OCTEP_VDPA_DEV_STATUS_INIT);
|
||||
break;
|
||||
}
|
||||
|
||||
if (atomic_read(&mgmt_dev->status) >= OCTEP_VDPA_DEV_STATUS_READY) {
|
||||
dev_info(dev, "Stopping vDPA setup task.\n");
|
||||
return;
|
||||
}
|
||||
|
||||
usleep_range(1000, 1500);
|
||||
}
|
||||
|
||||
if (atomic_read(&mgmt_dev->status) != OCTEP_VDPA_DEV_STATUS_INIT) {
|
||||
dev_err(dev, "BAR initialization is timed out\n");
|
||||
return;
|
||||
}
|
||||
|
||||
ret = octep_iomap_region(pdev, oct_hw->base, OCTEP_HW_CAPS_BAR);
|
||||
if (ret)
|
||||
return;
|
||||
|
||||
ret = octep_hw_caps_read(oct_hw, pdev);
|
||||
if (ret < 0)
|
||||
goto unmap_region;
|
||||
|
||||
mgmt_dev->mdev.ops = &octep_vdpa_mgmt_dev_ops;
|
||||
mgmt_dev->mdev.id_table = id_table;
|
||||
mgmt_dev->mdev.max_supported_vqs = oct_hw->nr_vring;
|
||||
mgmt_dev->mdev.supported_features = oct_hw->features;
|
||||
mgmt_dev->mdev.config_attr_mask = (1 << VDPA_ATTR_DEV_FEATURES);
|
||||
mgmt_dev->mdev.device = dev;
|
||||
|
||||
ret = vdpa_mgmtdev_register(&mgmt_dev->mdev);
|
||||
if (ret) {
|
||||
dev_err(dev, "Failed to register vdpa management interface\n");
|
||||
goto unmap_region;
|
||||
}
|
||||
|
||||
atomic_set(&mgmt_dev->status, OCTEP_VDPA_DEV_STATUS_READY);
|
||||
|
||||
return;
|
||||
|
||||
unmap_region:
|
||||
octep_iounmap_region(pdev, oct_hw->base, OCTEP_HW_CAPS_BAR);
|
||||
oct_hw->base[OCTEP_HW_CAPS_BAR] = NULL;
|
||||
}
|
||||
|
||||
static int octep_vdpa_probe_vf(struct pci_dev *pdev)
|
||||
{
|
||||
struct octep_vdpa_mgmt_dev *mgmt_dev;
|
||||
struct device *dev = &pdev->dev;
|
||||
int ret;
|
||||
|
||||
ret = pcim_enable_device(pdev);
|
||||
if (ret) {
|
||||
dev_err(dev, "Failed to enable device\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
|
||||
if (ret) {
|
||||
dev_err(dev, "No usable DMA configuration\n");
|
||||
return ret;
|
||||
}
|
||||
pci_set_master(pdev);
|
||||
|
||||
mgmt_dev = devm_kzalloc(dev, sizeof(struct octep_vdpa_mgmt_dev), GFP_KERNEL);
|
||||
if (!mgmt_dev)
|
||||
return -ENOMEM;
|
||||
|
||||
ret = octep_iomap_region(pdev, mgmt_dev->oct_hw.base, OCTEP_HW_MBOX_BAR);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
mgmt_dev->pdev = pdev;
|
||||
pci_set_drvdata(pdev, mgmt_dev);
|
||||
|
||||
atomic_set(&mgmt_dev->status, OCTEP_VDPA_DEV_STATUS_ALLOC);
|
||||
INIT_WORK(&mgmt_dev->setup_task, octep_vdpa_setup_task);
|
||||
schedule_work(&mgmt_dev->setup_task);
|
||||
dev_info(&pdev->dev, "octep vdpa mgmt device setup task is queued\n");
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void octep_vdpa_assign_barspace(struct pci_dev *vf_dev, struct pci_dev *pf_dev, u8 idx)
|
||||
{
|
||||
struct resource *vf_res = vf_dev->resource + PCI_STD_RESOURCES + 4;
|
||||
struct resource *pf_res = pf_dev->resource + PCI_STD_RESOURCES + 4;
|
||||
struct octep_pf *pf = pci_get_drvdata(pf_dev);
|
||||
struct pci_bus_region bus_region;
|
||||
|
||||
vf_res->name = pci_name(vf_dev);
|
||||
vf_res->flags = pf_res->flags;
|
||||
vf_res->parent = (pf_dev->resource + PCI_STD_RESOURCES)->parent;
|
||||
|
||||
bus_region.start = pf->vf_base + idx * pf->vf_stride;
|
||||
bus_region.end = bus_region.start + pf->vf_stride - 1;
|
||||
pcibios_bus_to_resource(vf_dev->bus, vf_res, &bus_region);
|
||||
}
|
||||
|
||||
static int octep_sriov_enable(struct pci_dev *pdev, int num_vfs)
|
||||
{
|
||||
struct octep_pf *pf = pci_get_drvdata(pdev);
|
||||
u8 __iomem *addr = pf->base[OCTEP_HW_MBOX_BAR];
|
||||
struct pci_dev *vf_pdev = NULL;
|
||||
bool done = false;
|
||||
int index = 0;
|
||||
int ret, i;
|
||||
|
||||
ret = pci_enable_sriov(pdev, num_vfs);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
pf->enabled_vfs = num_vfs;
|
||||
|
||||
while ((vf_pdev = pci_get_device(PCI_VENDOR_ID_CAVIUM, PCI_ANY_ID, vf_pdev))) {
|
||||
if (vf_pdev->device != pf->vf_devid)
|
||||
continue;
|
||||
|
||||
octep_vdpa_assign_barspace(vf_pdev, pdev, index);
|
||||
if (++index == num_vfs) {
|
||||
done = true;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
if (done) {
|
||||
for (i = 0; i < pf->enabled_vfs; i++)
|
||||
writeq(OCTEP_DEV_READY_SIGNATURE, addr + OCTEP_PF_MBOX_DATA(i));
|
||||
}
|
||||
|
||||
return num_vfs;
|
||||
}
|
||||
|
||||
static int octep_sriov_disable(struct pci_dev *pdev)
|
||||
{
|
||||
struct octep_pf *pf = pci_get_drvdata(pdev);
|
||||
|
||||
if (!pci_num_vf(pdev))
|
||||
return 0;
|
||||
|
||||
pci_disable_sriov(pdev);
|
||||
pf->enabled_vfs = 0;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int octep_vdpa_sriov_configure(struct pci_dev *pdev, int num_vfs)
|
||||
{
|
||||
if (num_vfs > 0)
|
||||
return octep_sriov_enable(pdev, num_vfs);
|
||||
else
|
||||
return octep_sriov_disable(pdev);
|
||||
}
|
||||
|
||||
static u16 octep_get_vf_devid(struct pci_dev *pdev)
|
||||
{
|
||||
u16 did;
|
||||
|
||||
switch (pdev->device) {
|
||||
case OCTEP_VDPA_DEVID_CN106K_PF:
|
||||
did = OCTEP_VDPA_DEVID_CN106K_VF;
|
||||
break;
|
||||
case OCTEP_VDPA_DEVID_CN105K_PF:
|
||||
did = OCTEP_VDPA_DEVID_CN105K_VF;
|
||||
break;
|
||||
case OCTEP_VDPA_DEVID_CN103K_PF:
|
||||
did = OCTEP_VDPA_DEVID_CN103K_VF;
|
||||
break;
|
||||
default:
|
||||
did = 0xFFFF;
|
||||
break;
|
||||
}
|
||||
|
||||
return did;
|
||||
}
|
||||
|
||||
static int octep_vdpa_pf_setup(struct octep_pf *octpf)
|
||||
{
|
||||
u8 __iomem *addr = octpf->base[OCTEP_HW_MBOX_BAR];
|
||||
struct pci_dev *pdev = octpf->pdev;
|
||||
int totalvfs;
|
||||
size_t len;
|
||||
u64 val;
|
||||
|
||||
totalvfs = pci_sriov_get_totalvfs(pdev);
|
||||
if (unlikely(!totalvfs)) {
|
||||
dev_info(&pdev->dev, "Total VFs are %d in PF sriov configuration\n", totalvfs);
|
||||
return 0;
|
||||
}
|
||||
|
||||
addr = octpf->base[OCTEP_HW_MBOX_BAR];
|
||||
val = readq(addr + OCTEP_EPF_RINFO(0));
|
||||
if (val == 0) {
|
||||
dev_err(&pdev->dev, "Invalid device configuration\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
if (OCTEP_EPF_RINFO_RPVF(val) != BIT_ULL(0)) {
|
||||
val &= ~GENMASK_ULL(35, 32);
|
||||
val |= BIT_ULL(32);
|
||||
writeq(val, addr + OCTEP_EPF_RINFO(0));
|
||||
}
|
||||
|
||||
len = pci_resource_len(pdev, OCTEP_HW_CAPS_BAR);
|
||||
|
||||
octpf->vf_stride = len / totalvfs;
|
||||
octpf->vf_devid = octep_get_vf_devid(pdev);
|
||||
|
||||
octep_vdpa_pf_bar_shrink(octpf);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int octep_vdpa_probe_pf(struct pci_dev *pdev)
|
||||
{
|
||||
struct device *dev = &pdev->dev;
|
||||
struct octep_pf *octpf;
|
||||
int ret;
|
||||
|
||||
ret = pcim_enable_device(pdev);
|
||||
if (ret) {
|
||||
dev_err(dev, "Failed to enable device\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
|
||||
if (ret) {
|
||||
dev_err(dev, "No usable DMA configuration\n");
|
||||
return ret;
|
||||
}
|
||||
octpf = devm_kzalloc(dev, sizeof(*octpf), GFP_KERNEL);
|
||||
if (!octpf)
|
||||
return -ENOMEM;
|
||||
|
||||
ret = octep_iomap_region(pdev, octpf->base, OCTEP_HW_MBOX_BAR);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
pci_set_master(pdev);
|
||||
pci_set_drvdata(pdev, octpf);
|
||||
octpf->pdev = pdev;
|
||||
|
||||
ret = octep_vdpa_pf_setup(octpf);
|
||||
if (ret)
|
||||
goto unmap_region;
|
||||
|
||||
return 0;
|
||||
|
||||
unmap_region:
|
||||
octep_iounmap_region(pdev, octpf->base, OCTEP_HW_MBOX_BAR);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int octep_vdpa_probe(struct pci_dev *pdev, const struct pci_device_id *id)
|
||||
{
|
||||
if (pdev->is_virtfn)
|
||||
return octep_vdpa_probe_vf(pdev);
|
||||
else
|
||||
return octep_vdpa_probe_pf(pdev);
|
||||
}
|
||||
|
||||
static struct pci_device_id octep_pci_vdpa_map[] = {
|
||||
{ PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, OCTEP_VDPA_DEVID_CN106K_PF) },
|
||||
{ PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, OCTEP_VDPA_DEVID_CN106K_VF) },
|
||||
{ PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, OCTEP_VDPA_DEVID_CN105K_PF) },
|
||||
{ PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, OCTEP_VDPA_DEVID_CN105K_VF) },
|
||||
{ PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, OCTEP_VDPA_DEVID_CN103K_PF) },
|
||||
{ PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, OCTEP_VDPA_DEVID_CN103K_VF) },
|
||||
{ 0 },
|
||||
};
|
||||
|
||||
static struct pci_driver octep_pci_vdpa = {
|
||||
.name = OCTEP_VDPA_DRIVER_NAME,
|
||||
.id_table = octep_pci_vdpa_map,
|
||||
.probe = octep_vdpa_probe,
|
||||
.remove = octep_vdpa_remove,
|
||||
.sriov_configure = octep_vdpa_sriov_configure
|
||||
};
|
||||
|
||||
module_pci_driver(octep_pci_vdpa);
|
||||
|
||||
MODULE_AUTHOR("Marvell");
|
||||
MODULE_DESCRIPTION("Marvell Octeon PCIe endpoint vDPA driver");
|
||||
MODULE_LICENSE("GPL");
|
||||
Loading…
Reference in New Issue
Block a user