devlink: move request_firmware out of driver

All drivers which implement the devlink flash update support, with the
exception of netdevsim, use either request_firmware or
request_firmware_direct to locate the firmware file. Rather than having
each driver do this separately as part of its .flash_update
implementation, perform the request_firmware within net/core/devlink.c

Replace the file_name parameter in the struct devlink_flash_update_params
with a pointer to the fw object.

Use request_firmware rather than request_firmware_direct. Although most
Linux distributions today do not have the fallback mechanism
implemented, only about half the drivers used the _direct request, as
compared to the generic request_firmware. In the event that
a distribution does support the fallback mechanism, the devlink flash
update ought to be able to use it to provide the firmware contents. For
distributions which do not support the fallback userspace mechanism,
there should be essentially no difference between request_firmware and
request_firmware_direct.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Acked-by: Shannon Nelson <snelson@pensando.io>
Acked-by: Vasundhara Volam <vasundhara-v.volam@broadcom.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.c

@@ -32,7 +32,7 @@ bnxt_dl_flash_update(struct devlink *dl,
 
 	devlink_flash_update_begin_notify(dl);
 	devlink_flash_update_status_notify(dl, "Preparing to flash", NULL, 0, 0);
-	rc = bnxt_flash_package_from_file(bp->dev, params->file_name, 0);
+	rc = bnxt_flash_package_from_fw_obj(bp->dev, params->fw, 0);
 	if (!rc)
 		devlink_flash_update_status_notify(dl, "Flashing done", NULL, 0, 0);
 	else

drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c

@@ -2419,13 +2419,12 @@ static int bnxt_flash_firmware_from_file(struct net_device *dev,
 	return rc;
 }
 
-int bnxt_flash_package_from_file(struct net_device *dev, const char *filename,
+int bnxt_flash_package_from_fw_obj(struct net_device *dev, const struct firmware *fw,
 				   u32 install_type)
 {
 	struct bnxt *bp = netdev_priv(dev);
 	struct hwrm_nvm_install_update_output *resp = bp->hwrm_cmd_resp_addr;
 	struct hwrm_nvm_install_update_input install = {0};
-	const struct firmware *fw;
 	u32 item_len;
 	int rc = 0;
 	u16 index;
@@ -2440,13 +2439,6 @@ int bnxt_flash_package_from_file(struct net_device *dev, const char *filename,
 		return rc;
 	}
 
-	rc = request_firmware(&fw, filename, &dev->dev);
-	if (rc != 0) {
-		netdev_err(dev, "PKG error %d requesting file: %s\n",
-			   rc, filename);
-		return rc;
-	}
-
 	if (fw->size > item_len) {
 		netdev_err(dev, "PKG insufficient update area in nvram: %lu\n",
 			   (unsigned long)fw->size);
@@ -2478,7 +2470,6 @@ int bnxt_flash_package_from_file(struct net_device *dev, const char *filename,
 					  dma_handle);
 		}
 	}
-	release_firmware(fw);
 	if (rc)
 		goto err_exit;
 
@@ -2517,6 +2508,26 @@ int bnxt_flash_package_from_file(struct net_device *dev, const char *filename,
 	return rc;
 }
 
+static int bnxt_flash_package_from_file(struct net_device *dev, const char *filename,
+					u32 install_type)
+{
+	const struct firmware *fw;
+	int rc;
+
+	rc = request_firmware(&fw, filename, &dev->dev);
+	if (rc != 0) {
+		netdev_err(dev, "PKG error %d requesting file: %s\n",
+			   rc, filename);
+		return rc;
+	}
+
+	rc = bnxt_flash_package_from_fw_obj(dev, fw, install_type);
+
+	release_firmware(fw);
+
+	return rc;
+}
+
 static int bnxt_flash_device(struct net_device *dev,
 			     struct ethtool_flash *flash)
 {

drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.h

@@ -94,7 +94,7 @@ u32 bnxt_fw_to_ethtool_speed(u16);
 u16 bnxt_get_fw_auto_link_speeds(u32);
 int bnxt_hwrm_nvm_get_dev_info(struct bnxt *bp,
 			       struct hwrm_nvm_get_dev_info_output *nvm_dev_info);
-int bnxt_flash_package_from_file(struct net_device *dev, const char *filename,
+int bnxt_flash_package_from_fw_obj(struct net_device *dev, const struct firmware *fw,
 				   u32 install_type);
 void bnxt_ethtool_init(struct bnxt *bp);
 void bnxt_ethtool_free(struct bnxt *bp);

drivers/net/ethernet/huawei/hinic/hinic_devlink.c

@@ -285,18 +285,8 @@ static int hinic_devlink_flash_update(struct devlink *devlink,
 				      struct netlink_ext_ack *extack)
 {
 	struct hinic_devlink_priv *priv = devlink_priv(devlink);
-	const struct firmware *fw;
-	int err;
-
-	err = request_firmware_direct(&fw, params->file_name,
-				      &priv->hwdev->hwif->pdev->dev);
-	if (err)
-		return err;
-
-	err = hinic_firmware_update(priv, fw, extack);
-	release_firmware(fw);
 
-	return err;
+	return hinic_firmware_update(priv, params->fw, extack);
 }
 
 static const struct devlink_ops hinic_devlink_ops = {

drivers/net/ethernet/intel/ice/ice_devlink.c

@@ -247,9 +247,7 @@ ice_devlink_flash_update(struct devlink *devlink,
 			 struct netlink_ext_ack *extack)
 {
 	struct ice_pf *pf = devlink_priv(devlink);
-	struct device *dev = &pf->pdev->dev;
 	struct ice_hw *hw = &pf->hw;
-	const struct firmware *fw;
 	u8 preservation;
 	int err;
 
@@ -277,21 +275,11 @@ ice_devlink_flash_update(struct devlink *devlink,
 	if (err)
 		return err;
 
-	err = request_firmware(&fw, params->file_name, dev);
-	if (err) {
-		NL_SET_ERR_MSG_MOD(extack, "Unable to read file from disk");
-		return err;
-	}
-
-	dev_dbg(dev, "Beginning flash update with file '%s'\n", params->file_name);
-
 	devlink_flash_update_begin_notify(devlink);
 	devlink_flash_update_status_notify(devlink, "Preparing to flash", NULL, 0, 0);
-	err = ice_flash_pldm_image(pf, fw, preservation, extack);
+	err = ice_flash_pldm_image(pf, params->fw, preservation, extack);
 	devlink_flash_update_end_notify(devlink);
 
-	release_firmware(fw);
-
 	return err;
 }
 

drivers/net/ethernet/mellanox/mlx5/core/devlink.c

@@ -13,17 +13,8 @@ static int mlx5_devlink_flash_update(struct devlink *devlink,
 				     struct netlink_ext_ack *extack)
 {
 	struct mlx5_core_dev *dev = devlink_priv(devlink);
-	const struct firmware *fw;
-	int err;
-
-	err = request_firmware_direct(&fw, params->file_name, &dev->pdev->dev);
-	if (err)
-		return err;
-
-	err = mlx5_firmware_flash(dev, fw, extack);
-	release_firmware(fw);
 
-	return err;
+	return mlx5_firmware_flash(dev, params->fw, extack);
 }
 
 static u8 mlx5_fw_ver_major(u32 version)

drivers/net/ethernet/mellanox/mlxsw/core.c

@@ -1117,16 +1117,7 @@ static int mlxsw_core_fw_flash_update(struct mlxsw_core *mlxsw_core,
 				      struct devlink_flash_update_params *params,
 				      struct netlink_ext_ack *extack)
 {
-	const struct firmware *firmware;
-	int err;
-
-	err = request_firmware_direct(&firmware, params->file_name, mlxsw_core->bus_info->dev);
-	if (err)
-		return err;
-	err = mlxsw_core_fw_flash(mlxsw_core, firmware, extack);
-	release_firmware(firmware);
-
-	return err;
+	return mlxsw_core_fw_flash(mlxsw_core, params->fw, extack);
 }
 
 static int mlxsw_core_devlink_param_fw_load_policy_validate(struct devlink *devlink, u32 id,

drivers/net/ethernet/netronome/nfp/nfp_devlink.c

@@ -333,7 +333,7 @@ nfp_devlink_flash_update(struct devlink *devlink,
 			 struct devlink_flash_update_params *params,
 			 struct netlink_ext_ack *extack)
 {
-	return nfp_flash_update_common(devlink_priv(devlink), params->file_name, extack);
+	return nfp_flash_update_common(devlink_priv(devlink), params->fw, extack);
 }
 
 const struct devlink_ops nfp_devlink_ops = {

drivers/net/ethernet/netronome/nfp/nfp_main.c

@@ -301,11 +301,10 @@ static int nfp_pcie_sriov_configure(struct pci_dev *pdev, int num_vfs)
 		return nfp_pcie_sriov_enable(pdev, num_vfs);
 }
 
-int nfp_flash_update_common(struct nfp_pf *pf, const char *path,
+int nfp_flash_update_common(struct nfp_pf *pf, const struct firmware *fw,
 			    struct netlink_ext_ack *extack)
 {
 	struct device *dev = &pf->pdev->dev;
-	const struct firmware *fw;
 	struct nfp_nsp *nsp;
 	int err;
 
@@ -319,24 +318,12 @@ int nfp_flash_update_common(struct nfp_pf *pf, const char *path,
 		return err;
 	}
 
-	err = request_firmware_direct(&fw, path, dev);
-	if (err) {
-		NL_SET_ERR_MSG_MOD(extack,
-				   "unable to read flash file from disk");
-		goto exit_close_nsp;
-	}
-
-	dev_info(dev, "Please be patient while writing flash image: %s\n",
-		 path);
-
 	err = nfp_nsp_write_flash(nsp, fw);
 	if (err < 0)
-		goto exit_release_fw;
+		goto exit_close_nsp;
 	dev_info(dev, "Finished writing flash image\n");
 	err = 0;
 
-exit_release_fw:
-	release_firmware(fw);
 exit_close_nsp:
 	nfp_nsp_close(nsp);
 	return err;

drivers/net/ethernet/netronome/nfp/nfp_main.h

@@ -166,7 +166,7 @@ nfp_pf_map_rtsym(struct nfp_pf *pf, const char *name, const char *sym_fmt,
 		 unsigned int min_size, struct nfp_cpp_area **area);
 int nfp_mbox_cmd(struct nfp_pf *pf, u32 cmd, void *in_data, u64 in_length,
 		 void *out_data, u64 out_length);
-int nfp_flash_update_common(struct nfp_pf *pf, const char *path,
+int nfp_flash_update_common(struct nfp_pf *pf, const struct firmware *fw,
 			    struct netlink_ext_ack *extack);
 
 enum nfp_dump_diag {

drivers/net/ethernet/pensando/ionic/ionic_devlink.c

@@ -15,7 +15,7 @@ static int ionic_dl_flash_update(struct devlink *dl,
 {
 	struct ionic *ionic = devlink_priv(dl);
 
-	return ionic_firmware_update(ionic->lif, params->file_name, extack);
+	return ionic_firmware_update(ionic->lif, params->fw, extack);
 }
 
 static int ionic_dl_info_get(struct devlink *dl, struct devlink_info_req *req,

drivers/net/ethernet/pensando/ionic/ionic_devlink.h

@@ -6,7 +6,7 @@
 
 #include <net/devlink.h>
 
-int ionic_firmware_update(struct ionic_lif *lif, const char *fw_name,
+int ionic_firmware_update(struct ionic_lif *lif, const struct firmware *fw,
 			  struct netlink_ext_ack *extack);
 
 struct ionic *ionic_devlink_alloc(struct device *dev);

drivers/net/ethernet/pensando/ionic/ionic_fw.c

@@ -91,7 +91,7 @@ static int ionic_fw_status_long_wait(struct ionic *ionic,
 	return err;
 }
 
-int ionic_firmware_update(struct ionic_lif *lif, const char *fw_name,
+int ionic_firmware_update(struct ionic_lif *lif, const struct firmware *fw,
 			  struct netlink_ext_ack *extack)
 {
 	struct ionic_dev *idev = &lif->ionic->idev;
@@ -99,24 +99,17 @@ int ionic_firmware_update(struct ionic_lif *lif, const char *fw_name,
 	struct ionic *ionic = lif->ionic;
 	union ionic_dev_cmd_comp comp;
 	u32 buf_sz, copy_sz, offset;
-	const struct firmware *fw;
 	struct devlink *dl;
 	int next_interval;
 	int err = 0;
 	u8 fw_slot;
 
-	netdev_info(netdev, "Installing firmware %s\n", fw_name);
+	netdev_info(netdev, "Installing firmware\n");
 
 	dl = priv_to_devlink(ionic);
 	devlink_flash_update_begin_notify(dl);
 	devlink_flash_update_status_notify(dl, "Preparing to flash", NULL, 0, 0);
 
-	err = request_firmware(&fw, fw_name, ionic->dev);
-	if (err) {
-		NL_SET_ERR_MSG_MOD(extack, "Unable to find firmware file");
-		goto err_out;
-	}
-
 	buf_sz = sizeof(idev->dev_cmd_regs->data);
 
 	netdev_dbg(netdev,
@@ -200,7 +193,6 @@ int ionic_firmware_update(struct ionic_lif *lif, const char *fw_name,
 		devlink_flash_update_status_notify(dl, "Flash failed", NULL, 0, 0);
 	else
 		devlink_flash_update_status_notify(dl, "Flash done", NULL, 0, 0);
-	release_firmware(fw);
 	devlink_flash_update_end_notify(dl);
 	return err;
 }

include/net/devlink.h

@@ -19,6 +19,7 @@
 #include <net/flow_offload.h>
 #include <uapi/linux/devlink.h>
 #include <linux/xarray.h>
+#include <linux/firmware.h>
 
 #define DEVLINK_RELOAD_STATS_ARRAY_SIZE \
 	(__DEVLINK_RELOAD_LIMIT_MAX * __DEVLINK_RELOAD_ACTION_MAX)
@@ -566,15 +567,15 @@ enum devlink_param_generic_id {
 
 /**
  * struct devlink_flash_update_params - Flash Update parameters
- * @file_name: the name of the flash firmware file to update from
+ * @fw: pointer to the firmware data to update from
  * @component: the flash component to update
  *
- * With the exception of file_name, drivers must opt-in to parameters by
+ * With the exception of fw, drivers must opt-in to parameters by
  * setting the appropriate bit in the supported_flash_update_params field in
  * their devlink_ops structure.
  */
 struct devlink_flash_update_params {
-	const char *file_name;
+	const struct firmware *fw;
 	const char *component;
 	u32 overwrite_mask;
 };

net/core/devlink.c

@@ -3431,10 +3431,12 @@ EXPORT_SYMBOL_GPL(devlink_flash_update_timeout_notify);
 static int devlink_nl_cmd_flash_update(struct sk_buff *skb,
 				       struct genl_info *info)
 {
-	struct nlattr *nla_component, *nla_overwrite_mask;
+	struct nlattr *nla_component, *nla_overwrite_mask, *nla_file_name;
 	struct devlink_flash_update_params params = {};
 	struct devlink *devlink = info->user_ptr[0];
+	const char *file_name;
 	u32 supported_params;
+	int ret;
 
 	if (!devlink->ops->flash_update)
 		return -EOPNOTSUPP;
@@ -3444,8 +3446,6 @@ static int devlink_nl_cmd_flash_update(struct sk_buff *skb,
 
 	supported_params = devlink->ops->supported_flash_update_params;
 
-	params.file_name = nla_data(info->attrs[DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME]);
-
 	nla_component = info->attrs[DEVLINK_ATTR_FLASH_UPDATE_COMPONENT];
 	if (nla_component) {
 		if (!(supported_params & DEVLINK_SUPPORT_FLASH_UPDATE_COMPONENT)) {
@@ -3469,7 +3469,19 @@ static int devlink_nl_cmd_flash_update(struct sk_buff *skb,
 		params.overwrite_mask = sections.value & sections.selector;
 	}
 
-	return devlink->ops->flash_update(devlink, &params, info->extack);
+	nla_file_name = info->attrs[DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME];
+	file_name = nla_data(nla_file_name);
+	ret = request_firmware(&params.fw, file_name, devlink->dev);
+	if (ret) {
+		NL_SET_ERR_MSG_ATTR(info->extack, nla_file_name, "failed to locate the requested firmware file");
+		return ret;
+	}
+
+	ret = devlink->ops->flash_update(devlink, &params, info->extack);
+
+	release_firmware(params.fw);
+
+	return ret;
 }
 
 static const struct devlink_param devlink_param_generic[] = {
@@ -10227,12 +10239,16 @@ int devlink_compat_flash_update(struct net_device *dev, const char *file_name)
 		goto out;
 	}
 
-	params.file_name = file_name;
+	ret = request_firmware(&params.fw, file_name, devlink->dev);
+	if (ret)
+		goto out;
 
 	mutex_lock(&devlink->lock);
 	ret = devlink->ops->flash_update(devlink, &params, NULL);
 	mutex_unlock(&devlink->lock);
 
+	release_firmware(params.fw);
+
 out:
 	rtnl_lock();
 	dev_put(dev);