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Message-ID: <20230406234143.11318-12-shannon.nelson@amd.com>
Date: Thu, 6 Apr 2023 16:41:40 -0700
From: Shannon Nelson <shannon.nelson@....com>
To: <shannon.nelson@....com>, <brett.creeley@....com>,
<davem@...emloft.net>, <netdev@...r.kernel.org>, <kuba@...nel.org>
CC: <drivers@...sando.io>, <leon@...nel.org>, <jiri@...nulli.us>
Subject: [PATCH v9 net-next 11/14] pds_core: devlink params for enabling VIF support
Add the devlink parameter switches so the user can enable
the features supported by the VFs. The only feature supported
at the moment is vDPA.
Example:
devlink dev param set pci/0000:2b:00.0 \
name enable_vnet cmode runtime value true
Signed-off-by: Shannon Nelson <shannon.nelson@....com>
---
.../device_drivers/ethernet/amd/pds_core.rst | 19 +++++
drivers/net/ethernet/amd/pds_core/core.h | 7 ++
drivers/net/ethernet/amd/pds_core/devlink.c | 73 +++++++++++++++++++
drivers/net/ethernet/amd/pds_core/main.c | 34 +++++++--
4 files changed, 127 insertions(+), 6 deletions(-)
diff --git a/Documentation/networking/device_drivers/ethernet/amd/pds_core.rst b/Documentation/networking/device_drivers/ethernet/amd/pds_core.rst
index 6faf46390f5f..9449451b538f 100644
--- a/Documentation/networking/device_drivers/ethernet/amd/pds_core.rst
+++ b/Documentation/networking/device_drivers/ethernet/amd/pds_core.rst
@@ -73,6 +73,25 @@ The ``pds_core`` driver reports the following versions
- fixed
- The revision of the ASIC for this device
+Parameters
+==========
+
+The ``pds_core`` driver implements the following generic
+parameters for controlling the functionality to be made available
+as auxiliary_bus devices.
+
+.. list-table:: Generic parameters implemented
+ :widths: 5 5 8 82
+
+ * - Name
+ - Mode
+ - Type
+ - Description
+ * - ``enable_vnet``
+ - runtime
+ - Boolean
+ - Enables vDPA functionality through an auxiliary_bus device
+
Firmware Management
===================
diff --git a/drivers/net/ethernet/amd/pds_core/core.h b/drivers/net/ethernet/amd/pds_core/core.h
index 16b20bd705e4..aab4986007b9 100644
--- a/drivers/net/ethernet/amd/pds_core/core.h
+++ b/drivers/net/ethernet/amd/pds_core/core.h
@@ -251,6 +251,13 @@ int pdsc_dl_info_get(struct devlink *dl, struct devlink_info_req *req,
int pdsc_dl_flash_update(struct devlink *dl,
struct devlink_flash_update_params *params,
struct netlink_ext_ack *extack);
+int pdsc_dl_enable_get(struct devlink *dl, u32 id,
+ struct devlink_param_gset_ctx *ctx);
+int pdsc_dl_enable_set(struct devlink *dl, u32 id,
+ struct devlink_param_gset_ctx *ctx);
+int pdsc_dl_enable_validate(struct devlink *dl, u32 id,
+ union devlink_param_value val,
+ struct netlink_ext_ack *extack);
void __iomem *pdsc_map_dbpage(struct pdsc *pdsc, int page_num);
diff --git a/drivers/net/ethernet/amd/pds_core/devlink.c b/drivers/net/ethernet/amd/pds_core/devlink.c
index 0e98137cf69b..550ae52eee85 100644
--- a/drivers/net/ethernet/amd/pds_core/devlink.c
+++ b/drivers/net/ethernet/amd/pds_core/devlink.c
@@ -2,6 +2,79 @@
/* Copyright(c) 2023 Advanced Micro Devices, Inc */
#include "core.h"
+#include <linux/pds/pds_auxbus.h>
+
+static struct
+pdsc_viftype *pdsc_dl_find_viftype_by_id(struct pdsc *pdsc,
+ enum devlink_param_type dl_id)
+{
+ int vt;
+
+ for (vt = 0; vt < PDS_DEV_TYPE_MAX; vt++) {
+ if (pdsc->viftype_status[vt].dl_id == dl_id)
+ return &pdsc->viftype_status[vt];
+ }
+
+ return NULL;
+}
+
+int pdsc_dl_enable_get(struct devlink *dl, u32 id,
+ struct devlink_param_gset_ctx *ctx)
+{
+ struct pdsc *pdsc = devlink_priv(dl);
+ struct pdsc_viftype *vt_entry;
+
+ vt_entry = pdsc_dl_find_viftype_by_id(pdsc, id);
+ if (!vt_entry)
+ return -ENOENT;
+
+ ctx->val.vbool = vt_entry->enabled;
+
+ return 0;
+}
+
+int pdsc_dl_enable_set(struct devlink *dl, u32 id,
+ struct devlink_param_gset_ctx *ctx)
+{
+ struct pdsc *pdsc = devlink_priv(dl);
+ struct pdsc_viftype *vt_entry;
+ int err = 0;
+ int vf_id;
+
+ vt_entry = pdsc_dl_find_viftype_by_id(pdsc, id);
+ if (!vt_entry || !vt_entry->supported)
+ return -EOPNOTSUPP;
+
+ if (vt_entry->enabled == ctx->val.vbool)
+ return 0;
+
+ vt_entry->enabled = ctx->val.vbool;
+ for (vf_id = 0; vf_id < pdsc->num_vfs; vf_id++) {
+ struct pdsc *vf = pdsc->vfs[vf_id].vf;
+
+ err = ctx->val.vbool ? pdsc_auxbus_dev_add_vf(vf, pdsc) :
+ pdsc_auxbus_dev_del_vf(vf, pdsc);
+ }
+
+ return err;
+}
+
+int pdsc_dl_enable_validate(struct devlink *dl, u32 id,
+ union devlink_param_value val,
+ struct netlink_ext_ack *extack)
+{
+ struct pdsc *pdsc = devlink_priv(dl);
+ struct pdsc_viftype *vt_entry;
+
+ vt_entry = pdsc_dl_find_viftype_by_id(pdsc, id);
+ if (!vt_entry || !vt_entry->supported)
+ return -EOPNOTSUPP;
+
+ if (!pdsc->viftype_status[vt_entry->vif_id].supported)
+ return -ENODEV;
+
+ return 0;
+}
int pdsc_dl_flash_update(struct devlink *dl,
struct devlink_flash_update_params *params,
diff --git a/drivers/net/ethernet/amd/pds_core/main.c b/drivers/net/ethernet/amd/pds_core/main.c
index 16a2d8a048a3..38c5e902b200 100644
--- a/drivers/net/ethernet/amd/pds_core/main.c
+++ b/drivers/net/ethernet/amd/pds_core/main.c
@@ -210,6 +210,14 @@ static const struct devlink_health_reporter_ops pdsc_fw_reporter_ops = {
.diagnose = pdsc_fw_reporter_diagnose,
};
+static const struct devlink_param pdsc_dl_params[] = {
+ DEVLINK_PARAM_GENERIC(ENABLE_VNET,
+ BIT(DEVLINK_PARAM_CMODE_RUNTIME),
+ pdsc_dl_enable_get,
+ pdsc_dl_enable_set,
+ pdsc_dl_enable_validate),
+};
+
#define PDSC_WQ_NAME_LEN 24
static int pdsc_init_pf(struct pdsc *pdsc)
@@ -257,13 +265,19 @@ static int pdsc_init_pf(struct pdsc *pdsc)
dl = priv_to_devlink(pdsc);
devl_lock(dl);
+ err = devl_params_register(dl, pdsc_dl_params,
+ ARRAY_SIZE(pdsc_dl_params));
+ if (err) {
+ dev_warn(pdsc->dev, "Failed to register devlink params: %pe\n",
+ ERR_PTR(err));
+ goto err_out_unlock_dl;
+ }
hr = devl_health_reporter_create(dl, &pdsc_fw_reporter_ops, 0, pdsc);
if (IS_ERR(hr)) {
dev_warn(pdsc->dev, "Failed to create fw reporter: %pe\n", hr);
err = PTR_ERR(hr);
- devl_unlock(dl);
- goto err_out_stop;
+ goto err_out_unreg_params;
}
pdsc->fw_reporter = hr;
@@ -275,7 +289,11 @@ static int pdsc_init_pf(struct pdsc *pdsc)
return 0;
-err_out_stop:
+err_out_unreg_params:
+ devl_params_unregister(dl, pdsc_dl_params,
+ ARRAY_SIZE(pdsc_dl_params));
+err_out_unlock_dl:
+ devl_unlock(dl);
pdsc_stop(pdsc);
err_out_teardown:
pdsc_teardown(pdsc, PDSC_TEARDOWN_REMOVING);
@@ -387,9 +405,13 @@ static void pdsc_remove(struct pci_dev *pdev)
dl = priv_to_devlink(pdsc);
devl_lock(dl);
devl_unregister(dl);
- if (pdsc->fw_reporter) {
- devl_health_reporter_destroy(pdsc->fw_reporter);
- pdsc->fw_reporter = NULL;
+ if (!pdev->is_virtfn) {
+ if (pdsc->fw_reporter) {
+ devl_health_reporter_destroy(pdsc->fw_reporter);
+ pdsc->fw_reporter = NULL;
+ }
+ devl_params_unregister(dl, pdsc_dl_params,
+ ARRAY_SIZE(pdsc_dl_params));
}
devl_unlock(dl);
--
2.17.1
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