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pds_vdpa: add vdpa config client commands
These are the adminq commands that will be needed for setting up and using the vDPA device. There are a number of commands defined in the FW's API, but by making use of the FW's virtio BAR we only need a few of these commands for vDPA support. Signed-off-by: Shannon Nelson <shannon.nelson@amd.com> Acked-by: Jason Wang <jasowang@redhat.com> Message-Id: <20230519215632.12343-9-shannon.nelson@amd.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Shannon Nelson
Michael S. Tsirkin
parent
94591894df
commit
c16d5a412e
@ -4,6 +4,7 @@
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obj-$(CONFIG_PDS_VDPA) := pds_vdpa.o
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pds_vdpa-y := aux_drv.o \
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cmds.o \
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vdpa_dev.o
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pds_vdpa-$(CONFIG_DEBUG_FS) += debugfs.o
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185
drivers/vdpa/pds/cmds.c
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185
drivers/vdpa/pds/cmds.c
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@ -0,0 +1,185 @@
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// SPDX-License-Identifier: GPL-2.0-only
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/* Copyright(c) 2023 Advanced Micro Devices, Inc */
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#include <linux/vdpa.h>
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#include <linux/virtio_pci_modern.h>
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#include <linux/pds/pds_common.h>
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#include <linux/pds/pds_core_if.h>
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#include <linux/pds/pds_adminq.h>
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#include <linux/pds/pds_auxbus.h>
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#include "vdpa_dev.h"
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#include "aux_drv.h"
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#include "cmds.h"
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int pds_vdpa_init_hw(struct pds_vdpa_device *pdsv)
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{
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struct pds_auxiliary_dev *padev = pdsv->vdpa_aux->padev;
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struct device *dev = &padev->aux_dev.dev;
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union pds_core_adminq_cmd cmd = {
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.vdpa_init.opcode = PDS_VDPA_CMD_INIT,
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.vdpa_init.vdpa_index = pdsv->vdpa_index,
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.vdpa_init.vf_id = cpu_to_le16(pdsv->vdpa_aux->vf_id),
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};
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union pds_core_adminq_comp comp = {};
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int err;
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/* Initialize the vdpa/virtio device */
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err = pds_client_adminq_cmd(padev, &cmd, sizeof(cmd.vdpa_init),
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&comp, 0);
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if (err)
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dev_dbg(dev, "Failed to init hw, status %d: %pe\n",
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comp.status, ERR_PTR(err));
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return err;
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}
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int pds_vdpa_cmd_reset(struct pds_vdpa_device *pdsv)
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{
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struct pds_auxiliary_dev *padev = pdsv->vdpa_aux->padev;
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struct device *dev = &padev->aux_dev.dev;
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union pds_core_adminq_cmd cmd = {
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.vdpa.opcode = PDS_VDPA_CMD_RESET,
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.vdpa.vdpa_index = pdsv->vdpa_index,
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.vdpa.vf_id = cpu_to_le16(pdsv->vdpa_aux->vf_id),
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};
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union pds_core_adminq_comp comp = {};
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int err;
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err = pds_client_adminq_cmd(padev, &cmd, sizeof(cmd.vdpa), &comp, 0);
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if (err)
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dev_dbg(dev, "Failed to reset hw, status %d: %pe\n",
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comp.status, ERR_PTR(err));
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return err;
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}
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int pds_vdpa_cmd_set_status(struct pds_vdpa_device *pdsv, u8 status)
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{
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struct pds_auxiliary_dev *padev = pdsv->vdpa_aux->padev;
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struct device *dev = &padev->aux_dev.dev;
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union pds_core_adminq_cmd cmd = {
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.vdpa_status.opcode = PDS_VDPA_CMD_STATUS_UPDATE,
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.vdpa_status.vdpa_index = pdsv->vdpa_index,
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.vdpa_status.vf_id = cpu_to_le16(pdsv->vdpa_aux->vf_id),
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.vdpa_status.status = status,
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};
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union pds_core_adminq_comp comp = {};
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int err;
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err = pds_client_adminq_cmd(padev, &cmd, sizeof(cmd.vdpa_status), &comp, 0);
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if (err)
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dev_dbg(dev, "Failed to set status to %#x, error status %d: %pe\n",
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status, comp.status, ERR_PTR(err));
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return err;
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}
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int pds_vdpa_cmd_set_mac(struct pds_vdpa_device *pdsv, u8 *mac)
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{
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struct pds_auxiliary_dev *padev = pdsv->vdpa_aux->padev;
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struct device *dev = &padev->aux_dev.dev;
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union pds_core_adminq_cmd cmd = {
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.vdpa_setattr.opcode = PDS_VDPA_CMD_SET_ATTR,
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.vdpa_setattr.vdpa_index = pdsv->vdpa_index,
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.vdpa_setattr.vf_id = cpu_to_le16(pdsv->vdpa_aux->vf_id),
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.vdpa_setattr.attr = PDS_VDPA_ATTR_MAC,
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};
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union pds_core_adminq_comp comp = {};
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int err;
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ether_addr_copy(cmd.vdpa_setattr.mac, mac);
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err = pds_client_adminq_cmd(padev, &cmd, sizeof(cmd.vdpa_setattr),
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&comp, 0);
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if (err)
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dev_dbg(dev, "Failed to set mac address %pM, status %d: %pe\n",
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mac, comp.status, ERR_PTR(err));
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return err;
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}
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int pds_vdpa_cmd_set_max_vq_pairs(struct pds_vdpa_device *pdsv, u16 max_vqp)
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{
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struct pds_auxiliary_dev *padev = pdsv->vdpa_aux->padev;
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struct device *dev = &padev->aux_dev.dev;
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union pds_core_adminq_cmd cmd = {
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.vdpa_setattr.opcode = PDS_VDPA_CMD_SET_ATTR,
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.vdpa_setattr.vdpa_index = pdsv->vdpa_index,
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.vdpa_setattr.vf_id = cpu_to_le16(pdsv->vdpa_aux->vf_id),
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.vdpa_setattr.attr = PDS_VDPA_ATTR_MAX_VQ_PAIRS,
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.vdpa_setattr.max_vq_pairs = cpu_to_le16(max_vqp),
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};
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union pds_core_adminq_comp comp = {};
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int err;
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err = pds_client_adminq_cmd(padev, &cmd, sizeof(cmd.vdpa_setattr),
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&comp, 0);
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if (err)
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dev_dbg(dev, "Failed to set max vq pairs %u, status %d: %pe\n",
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max_vqp, comp.status, ERR_PTR(err));
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return err;
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}
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int pds_vdpa_cmd_init_vq(struct pds_vdpa_device *pdsv, u16 qid, u16 invert_idx,
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struct pds_vdpa_vq_info *vq_info)
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{
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struct pds_auxiliary_dev *padev = pdsv->vdpa_aux->padev;
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struct device *dev = &padev->aux_dev.dev;
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union pds_core_adminq_cmd cmd = {
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.vdpa_vq_init.opcode = PDS_VDPA_CMD_VQ_INIT,
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.vdpa_vq_init.vdpa_index = pdsv->vdpa_index,
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.vdpa_vq_init.vf_id = cpu_to_le16(pdsv->vdpa_aux->vf_id),
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.vdpa_vq_init.qid = cpu_to_le16(qid),
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.vdpa_vq_init.len = cpu_to_le16(ilog2(vq_info->q_len)),
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.vdpa_vq_init.desc_addr = cpu_to_le64(vq_info->desc_addr),
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.vdpa_vq_init.avail_addr = cpu_to_le64(vq_info->avail_addr),
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.vdpa_vq_init.used_addr = cpu_to_le64(vq_info->used_addr),
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.vdpa_vq_init.intr_index = cpu_to_le16(qid),
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.vdpa_vq_init.avail_index = cpu_to_le16(vq_info->avail_idx ^ invert_idx),
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.vdpa_vq_init.used_index = cpu_to_le16(vq_info->used_idx ^ invert_idx),
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};
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union pds_core_adminq_comp comp = {};
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int err;
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dev_dbg(dev, "%s: qid %d len %d desc_addr %#llx avail_addr %#llx used_addr %#llx\n",
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__func__, qid, ilog2(vq_info->q_len),
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vq_info->desc_addr, vq_info->avail_addr, vq_info->used_addr);
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err = pds_client_adminq_cmd(padev, &cmd, sizeof(cmd.vdpa_vq_init),
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&comp, 0);
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if (err)
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dev_dbg(dev, "Failed to init vq %d, status %d: %pe\n",
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qid, comp.status, ERR_PTR(err));
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return err;
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}
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int pds_vdpa_cmd_reset_vq(struct pds_vdpa_device *pdsv, u16 qid, u16 invert_idx,
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struct pds_vdpa_vq_info *vq_info)
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{
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struct pds_auxiliary_dev *padev = pdsv->vdpa_aux->padev;
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struct device *dev = &padev->aux_dev.dev;
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union pds_core_adminq_cmd cmd = {
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.vdpa_vq_reset.opcode = PDS_VDPA_CMD_VQ_RESET,
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.vdpa_vq_reset.vdpa_index = pdsv->vdpa_index,
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.vdpa_vq_reset.vf_id = cpu_to_le16(pdsv->vdpa_aux->vf_id),
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.vdpa_vq_reset.qid = cpu_to_le16(qid),
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};
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union pds_core_adminq_comp comp = {};
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int err;
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err = pds_client_adminq_cmd(padev, &cmd, sizeof(cmd.vdpa_vq_reset),
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&comp, 0);
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if (err) {
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dev_dbg(dev, "Failed to reset vq %d, status %d: %pe\n",
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qid, comp.status, ERR_PTR(err));
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return err;
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}
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vq_info->avail_idx = le16_to_cpu(comp.vdpa_vq_reset.avail_index) ^ invert_idx;
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vq_info->used_idx = le16_to_cpu(comp.vdpa_vq_reset.used_index) ^ invert_idx;
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return 0;
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}
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18
drivers/vdpa/pds/cmds.h
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18
drivers/vdpa/pds/cmds.h
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@ -0,0 +1,18 @@
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/* SPDX-License-Identifier: GPL-2.0-only */
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/* Copyright(c) 2023 Advanced Micro Devices, Inc */
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#ifndef _VDPA_CMDS_H_
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#define _VDPA_CMDS_H_
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int pds_vdpa_init_hw(struct pds_vdpa_device *pdsv);
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int pds_vdpa_cmd_reset(struct pds_vdpa_device *pdsv);
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int pds_vdpa_cmd_set_status(struct pds_vdpa_device *pdsv, u8 status);
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int pds_vdpa_cmd_set_mac(struct pds_vdpa_device *pdsv, u8 *mac);
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int pds_vdpa_cmd_set_max_vq_pairs(struct pds_vdpa_device *pdsv, u16 max_vqp);
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int pds_vdpa_cmd_init_vq(struct pds_vdpa_device *pdsv, u16 qid, u16 invert_idx,
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struct pds_vdpa_vq_info *vq_info);
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int pds_vdpa_cmd_reset_vq(struct pds_vdpa_device *pdsv, u16 qid, u16 invert_idx,
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struct pds_vdpa_vq_info *vq_info);
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int pds_vdpa_cmd_set_features(struct pds_vdpa_device *pdsv, u64 features);
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#endif /* _VDPA_CMDS_H_ */
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@ -4,11 +4,42 @@
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#ifndef _VDPA_DEV_H_
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#define _VDPA_DEV_H_
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#define PDS_VDPA_MAX_QUEUES 65
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#include <linux/pci.h>
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#include <linux/vdpa.h>
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struct pds_vdpa_vq_info {
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bool ready;
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u64 desc_addr;
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u64 avail_addr;
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u64 used_addr;
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u32 q_len;
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u16 qid;
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int irq;
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char irq_name[32];
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void __iomem *notify;
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dma_addr_t notify_pa;
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u64 doorbell;
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u16 avail_idx;
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u16 used_idx;
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struct vdpa_callback event_cb;
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struct pds_vdpa_device *pdsv;
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};
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#define PDS_VDPA_MAX_QUEUES 65
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#define PDS_VDPA_MAX_QLEN 32768
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struct pds_vdpa_device {
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struct vdpa_device vdpa_dev;
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struct pds_vdpa_aux *vdpa_aux;
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struct pds_vdpa_vq_info vqs[PDS_VDPA_MAX_QUEUES];
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u64 req_features; /* features requested by vdpa */
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u64 actual_features; /* features negotiated and in use */
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u8 vdpa_index; /* rsvd for future subdevice use */
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u8 num_vqs; /* num vqs in use */
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struct vdpa_callback config_cb;
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};
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int pds_vdpa_get_mgmt_info(struct pds_vdpa_aux *vdpa_aux);
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