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Date: Mon, 15 May 2023 19:55:18 -0700
From: Shannon Nelson <shannon.nelson@....com>
To: <jasowang@...hat.com>, <mst@...hat.com>,
<virtualization@...ts.linux-foundation.org>, <shannon.nelson@....com>,
<brett.creeley@....com>, <netdev@...r.kernel.org>
CC: <simon.horman@...igine.com>, <drivers@...sando.io>
Subject: [PATCH v6 virtio 08/11] 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@....com>
Acked-by: Jason Wang <jasowang@...hat.com>
---
drivers/vdpa/pds/Makefile | 1 +
drivers/vdpa/pds/cmds.c | 185 ++++++++++++++++++++++++++++++++++++
drivers/vdpa/pds/cmds.h | 18 ++++
drivers/vdpa/pds/vdpa_dev.h | 33 ++++++-
4 files changed, 236 insertions(+), 1 deletion(-)
create mode 100644 drivers/vdpa/pds/cmds.c
create mode 100644 drivers/vdpa/pds/cmds.h
diff --git a/drivers/vdpa/pds/Makefile b/drivers/vdpa/pds/Makefile
index 13b50394ec64..2e22418e3ab3 100644
--- a/drivers/vdpa/pds/Makefile
+++ b/drivers/vdpa/pds/Makefile
@@ -4,6 +4,7 @@
obj-$(CONFIG_PDS_VDPA) := pds_vdpa.o
pds_vdpa-y := aux_drv.o \
+ cmds.o \
vdpa_dev.o
pds_vdpa-$(CONFIG_DEBUG_FS) += debugfs.o
diff --git a/drivers/vdpa/pds/cmds.c b/drivers/vdpa/pds/cmds.c
new file mode 100644
index 000000000000..80863a41c3cd
--- /dev/null
+++ b/drivers/vdpa/pds/cmds.c
@@ -0,0 +1,185 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* Copyright(c) 2023 Advanced Micro Devices, Inc */
+
+#include <linux/vdpa.h>
+#include <linux/virtio_pci_modern.h>
+
+#include <linux/pds/pds_common.h>
+#include <linux/pds/pds_core_if.h>
+#include <linux/pds/pds_adminq.h>
+#include <linux/pds/pds_auxbus.h>
+
+#include "vdpa_dev.h"
+#include "aux_drv.h"
+#include "cmds.h"
+
+int pds_vdpa_init_hw(struct pds_vdpa_device *pdsv)
+{
+ struct pds_auxiliary_dev *padev = pdsv->vdpa_aux->padev;
+ struct device *dev = &padev->aux_dev.dev;
+ union pds_core_adminq_cmd cmd = {
+ .vdpa_init.opcode = PDS_VDPA_CMD_INIT,
+ .vdpa_init.vdpa_index = pdsv->vdpa_index,
+ .vdpa_init.vf_id = cpu_to_le16(pdsv->vdpa_aux->vf_id),
+ };
+ union pds_core_adminq_comp comp = {};
+ int err;
+
+ /* Initialize the vdpa/virtio device */
+ err = pds_client_adminq_cmd(padev, &cmd, sizeof(cmd.vdpa_init),
+ &comp, 0);
+ if (err)
+ dev_dbg(dev, "Failed to init hw, status %d: %pe\n",
+ comp.status, ERR_PTR(err));
+
+ return err;
+}
+
+int pds_vdpa_cmd_reset(struct pds_vdpa_device *pdsv)
+{
+ struct pds_auxiliary_dev *padev = pdsv->vdpa_aux->padev;
+ struct device *dev = &padev->aux_dev.dev;
+ union pds_core_adminq_cmd cmd = {
+ .vdpa.opcode = PDS_VDPA_CMD_RESET,
+ .vdpa.vdpa_index = pdsv->vdpa_index,
+ .vdpa.vf_id = cpu_to_le16(pdsv->vdpa_aux->vf_id),
+ };
+ union pds_core_adminq_comp comp = {};
+ int err;
+
+ err = pds_client_adminq_cmd(padev, &cmd, sizeof(cmd.vdpa), &comp, 0);
+ if (err)
+ dev_dbg(dev, "Failed to reset hw, status %d: %pe\n",
+ comp.status, ERR_PTR(err));
+
+ return err;
+}
+
+int pds_vdpa_cmd_set_status(struct pds_vdpa_device *pdsv, u8 status)
+{
+ struct pds_auxiliary_dev *padev = pdsv->vdpa_aux->padev;
+ struct device *dev = &padev->aux_dev.dev;
+ union pds_core_adminq_cmd cmd = {
+ .vdpa_status.opcode = PDS_VDPA_CMD_STATUS_UPDATE,
+ .vdpa_status.vdpa_index = pdsv->vdpa_index,
+ .vdpa_status.vf_id = cpu_to_le16(pdsv->vdpa_aux->vf_id),
+ .vdpa_status.status = status,
+ };
+ union pds_core_adminq_comp comp = {};
+ int err;
+
+ err = pds_client_adminq_cmd(padev, &cmd, sizeof(cmd.vdpa_status), &comp, 0);
+ if (err)
+ dev_dbg(dev, "Failed to set status to %#x, error status %d: %pe\n",
+ status, comp.status, ERR_PTR(err));
+
+ return err;
+}
+
+int pds_vdpa_cmd_set_mac(struct pds_vdpa_device *pdsv, u8 *mac)
+{
+ struct pds_auxiliary_dev *padev = pdsv->vdpa_aux->padev;
+ struct device *dev = &padev->aux_dev.dev;
+ union pds_core_adminq_cmd cmd = {
+ .vdpa_setattr.opcode = PDS_VDPA_CMD_SET_ATTR,
+ .vdpa_setattr.vdpa_index = pdsv->vdpa_index,
+ .vdpa_setattr.vf_id = cpu_to_le16(pdsv->vdpa_aux->vf_id),
+ .vdpa_setattr.attr = PDS_VDPA_ATTR_MAC,
+ };
+ union pds_core_adminq_comp comp = {};
+ int err;
+
+ ether_addr_copy(cmd.vdpa_setattr.mac, mac);
+ err = pds_client_adminq_cmd(padev, &cmd, sizeof(cmd.vdpa_setattr),
+ &comp, 0);
+ if (err)
+ dev_dbg(dev, "Failed to set mac address %pM, status %d: %pe\n",
+ mac, comp.status, ERR_PTR(err));
+
+ return err;
+}
+
+int pds_vdpa_cmd_set_max_vq_pairs(struct pds_vdpa_device *pdsv, u16 max_vqp)
+{
+ struct pds_auxiliary_dev *padev = pdsv->vdpa_aux->padev;
+ struct device *dev = &padev->aux_dev.dev;
+ union pds_core_adminq_cmd cmd = {
+ .vdpa_setattr.opcode = PDS_VDPA_CMD_SET_ATTR,
+ .vdpa_setattr.vdpa_index = pdsv->vdpa_index,
+ .vdpa_setattr.vf_id = cpu_to_le16(pdsv->vdpa_aux->vf_id),
+ .vdpa_setattr.attr = PDS_VDPA_ATTR_MAX_VQ_PAIRS,
+ .vdpa_setattr.max_vq_pairs = cpu_to_le16(max_vqp),
+ };
+ union pds_core_adminq_comp comp = {};
+ int err;
+
+ err = pds_client_adminq_cmd(padev, &cmd, sizeof(cmd.vdpa_setattr),
+ &comp, 0);
+ if (err)
+ dev_dbg(dev, "Failed to set max vq pairs %u, status %d: %pe\n",
+ max_vqp, comp.status, ERR_PTR(err));
+
+ return err;
+}
+
+int pds_vdpa_cmd_init_vq(struct pds_vdpa_device *pdsv, u16 qid, u16 invert_idx,
+ struct pds_vdpa_vq_info *vq_info)
+{
+ struct pds_auxiliary_dev *padev = pdsv->vdpa_aux->padev;
+ struct device *dev = &padev->aux_dev.dev;
+ union pds_core_adminq_cmd cmd = {
+ .vdpa_vq_init.opcode = PDS_VDPA_CMD_VQ_INIT,
+ .vdpa_vq_init.vdpa_index = pdsv->vdpa_index,
+ .vdpa_vq_init.vf_id = cpu_to_le16(pdsv->vdpa_aux->vf_id),
+ .vdpa_vq_init.qid = cpu_to_le16(qid),
+ .vdpa_vq_init.len = cpu_to_le16(ilog2(vq_info->q_len)),
+ .vdpa_vq_init.desc_addr = cpu_to_le64(vq_info->desc_addr),
+ .vdpa_vq_init.avail_addr = cpu_to_le64(vq_info->avail_addr),
+ .vdpa_vq_init.used_addr = cpu_to_le64(vq_info->used_addr),
+ .vdpa_vq_init.intr_index = cpu_to_le16(qid),
+ .vdpa_vq_init.avail_index = cpu_to_le16(vq_info->avail_idx ^ invert_idx),
+ .vdpa_vq_init.used_index = cpu_to_le16(vq_info->used_idx ^ invert_idx),
+ };
+ union pds_core_adminq_comp comp = {};
+ int err;
+
+ dev_dbg(dev, "%s: qid %d len %d desc_addr %#llx avail_addr %#llx used_addr %#llx\n",
+ __func__, qid, ilog2(vq_info->q_len),
+ vq_info->desc_addr, vq_info->avail_addr, vq_info->used_addr);
+
+ err = pds_client_adminq_cmd(padev, &cmd, sizeof(cmd.vdpa_vq_init),
+ &comp, 0);
+ if (err)
+ dev_dbg(dev, "Failed to init vq %d, status %d: %pe\n",
+ qid, comp.status, ERR_PTR(err));
+
+ return err;
+}
+
+int pds_vdpa_cmd_reset_vq(struct pds_vdpa_device *pdsv, u16 qid, u16 invert_idx,
+ struct pds_vdpa_vq_info *vq_info)
+{
+ struct pds_auxiliary_dev *padev = pdsv->vdpa_aux->padev;
+ struct device *dev = &padev->aux_dev.dev;
+ union pds_core_adminq_cmd cmd = {
+ .vdpa_vq_reset.opcode = PDS_VDPA_CMD_VQ_RESET,
+ .vdpa_vq_reset.vdpa_index = pdsv->vdpa_index,
+ .vdpa_vq_reset.vf_id = cpu_to_le16(pdsv->vdpa_aux->vf_id),
+ .vdpa_vq_reset.qid = cpu_to_le16(qid),
+ };
+ union pds_core_adminq_comp comp = {};
+ int err;
+
+ err = pds_client_adminq_cmd(padev, &cmd, sizeof(cmd.vdpa_vq_reset),
+ &comp, 0);
+ if (err) {
+ dev_dbg(dev, "Failed to reset vq %d, status %d: %pe\n",
+ qid, comp.status, ERR_PTR(err));
+ return err;
+ }
+
+ vq_info->avail_idx = le16_to_cpu(comp.vdpa_vq_reset.avail_index) ^ invert_idx;
+ vq_info->used_idx = le16_to_cpu(comp.vdpa_vq_reset.used_index) ^ invert_idx;
+
+ return 0;
+}
diff --git a/drivers/vdpa/pds/cmds.h b/drivers/vdpa/pds/cmds.h
new file mode 100644
index 000000000000..e24d85cb8f1c
--- /dev/null
+++ b/drivers/vdpa/pds/cmds.h
@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* Copyright(c) 2023 Advanced Micro Devices, Inc */
+
+#ifndef _VDPA_CMDS_H_
+#define _VDPA_CMDS_H_
+
+int pds_vdpa_init_hw(struct pds_vdpa_device *pdsv);
+
+int pds_vdpa_cmd_reset(struct pds_vdpa_device *pdsv);
+int pds_vdpa_cmd_set_status(struct pds_vdpa_device *pdsv, u8 status);
+int pds_vdpa_cmd_set_mac(struct pds_vdpa_device *pdsv, u8 *mac);
+int pds_vdpa_cmd_set_max_vq_pairs(struct pds_vdpa_device *pdsv, u16 max_vqp);
+int pds_vdpa_cmd_init_vq(struct pds_vdpa_device *pdsv, u16 qid, u16 invert_idx,
+ struct pds_vdpa_vq_info *vq_info);
+int pds_vdpa_cmd_reset_vq(struct pds_vdpa_device *pdsv, u16 qid, u16 invert_idx,
+ struct pds_vdpa_vq_info *vq_info);
+int pds_vdpa_cmd_set_features(struct pds_vdpa_device *pdsv, u64 features);
+#endif /* _VDPA_CMDS_H_ */
diff --git a/drivers/vdpa/pds/vdpa_dev.h b/drivers/vdpa/pds/vdpa_dev.h
index 97fab833a0aa..a21596f438c1 100644
--- a/drivers/vdpa/pds/vdpa_dev.h
+++ b/drivers/vdpa/pds/vdpa_dev.h
@@ -4,11 +4,42 @@
#ifndef _VDPA_DEV_H_
#define _VDPA_DEV_H_
-#define PDS_VDPA_MAX_QUEUES 65
+#include <linux/pci.h>
+#include <linux/vdpa.h>
+
+struct pds_vdpa_vq_info {
+ bool ready;
+ u64 desc_addr;
+ u64 avail_addr;
+ u64 used_addr;
+ u32 q_len;
+ u16 qid;
+ int irq;
+ char irq_name[32];
+
+ void __iomem *notify;
+ dma_addr_t notify_pa;
+
+ u64 doorbell;
+ u16 avail_idx;
+ u16 used_idx;
+ struct vdpa_callback event_cb;
+ struct pds_vdpa_device *pdsv;
+};
+
+#define PDS_VDPA_MAX_QUEUES 65
+#define PDS_VDPA_MAX_QLEN 32768
struct pds_vdpa_device {
struct vdpa_device vdpa_dev;
struct pds_vdpa_aux *vdpa_aux;
+
+ struct pds_vdpa_vq_info vqs[PDS_VDPA_MAX_QUEUES];
+ u64 req_features; /* features requested by vdpa */
+ u64 actual_features; /* features negotiated and in use */
+ u8 vdpa_index; /* rsvd for future subdevice use */
+ u8 num_vqs; /* num vqs in use */
+ struct vdpa_callback config_cb;
};
int pds_vdpa_get_mgmt_info(struct pds_vdpa_aux *vdpa_aux);
--
2.17.1
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