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Date: Tue, 28 Jun 2022 14:59:57 +0100
From: Martin Habets <habetsm.xilinx@...il.com>
To: davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com,
edumazet@...gle.com, jonathan.s.cooper@....com
Cc: netdev@...r.kernel.org, ecree.xilinx@...il.com
Subject: [PATCH net-next v2 06/10] sfc: Separate efx_nic memory from
net_device memory
From: Jonathan Cooper <jonathan.s.cooper@....com>
As we have a lot of common code this applies to all NIC architectures.
Signed-off-by: Jonathan Cooper <jonathan.s.cooper@....com>
Co-developed-by: Martin Habets <habetsm.xilinx@...il.com>
Signed-off-by: Martin Habets <habetsm.xilinx@...il.com>
---
drivers/net/ethernet/sfc/ef100.c | 18 +++++++++++++++---
drivers/net/ethernet/sfc/ef100_netdev.c | 2 +-
drivers/net/ethernet/sfc/efx.c | 20 ++++++++++++++++----
drivers/net/ethernet/sfc/net_driver.h | 15 ++++++++++++++-
4 files changed, 46 insertions(+), 9 deletions(-)
diff --git a/drivers/net/ethernet/sfc/ef100.c b/drivers/net/ethernet/sfc/ef100.c
index 96b99966ce25..a77100239e7c 100644
--- a/drivers/net/ethernet/sfc/ef100.c
+++ b/drivers/net/ethernet/sfc/ef100.c
@@ -423,6 +423,7 @@ static int ef100_pci_find_func_ctrl_window(struct efx_nic *efx,
*/
static void ef100_pci_remove(struct pci_dev *pci_dev)
{
+ struct efx_probe_data *probe_data;
struct efx_nic *efx;
efx = pci_get_drvdata(pci_dev);
@@ -448,6 +449,8 @@ static void ef100_pci_remove(struct pci_dev *pci_dev)
pci_set_drvdata(pci_dev, NULL);
efx_fini_struct(efx);
free_netdev(efx->net_dev);
+ probe_data = container_of(efx, struct efx_probe_data, efx);
+ kfree(probe_data);
pci_disable_pcie_error_reporting(pci_dev);
};
@@ -455,16 +458,25 @@ static void ef100_pci_remove(struct pci_dev *pci_dev)
static int ef100_pci_probe(struct pci_dev *pci_dev,
const struct pci_device_id *entry)
{
+ struct efx_probe_data *probe_data, **probe_ptr;
struct ef100_func_ctl_window fcw = { 0 };
struct net_device *net_dev;
struct efx_nic *efx;
int rc;
- /* Allocate and initialise a struct net_device and struct efx_nic */
- net_dev = alloc_etherdev_mq(sizeof(*efx), EFX_MAX_CORE_TX_QUEUES);
+ /* Allocate probe data and struct efx_nic */
+ probe_data = kzalloc(sizeof(*probe_data), GFP_KERNEL);
+ if (!probe_data)
+ return -ENOMEM;
+ probe_data->pci_dev = pci_dev;
+ efx = &probe_data->efx;
+
+ /* Allocate and initialise a struct net_device */
+ net_dev = alloc_etherdev_mq(sizeof(probe_data), EFX_MAX_CORE_TX_QUEUES);
if (!net_dev)
return -ENOMEM;
- efx = efx_netdev_priv(net_dev);
+ probe_ptr = netdev_priv(net_dev);
+ *probe_ptr = probe_data;
efx->type = (const struct efx_nic_type *)entry->driver_data;
pci_set_drvdata(pci_dev, efx);
diff --git a/drivers/net/ethernet/sfc/ef100_netdev.c b/drivers/net/ethernet/sfc/ef100_netdev.c
index e833eaaf61b6..7a80979f4ab7 100644
--- a/drivers/net/ethernet/sfc/ef100_netdev.c
+++ b/drivers/net/ethernet/sfc/ef100_netdev.c
@@ -243,7 +243,7 @@ int ef100_netdev_event(struct notifier_block *this,
struct efx_nic *efx = container_of(this, struct efx_nic, netdev_notifier);
struct net_device *net_dev = netdev_notifier_info_to_dev(ptr);
- if (efx_netdev_priv(net_dev) == efx && event == NETDEV_CHANGENAME)
+ if (efx->net_dev == net_dev && event == NETDEV_CHANGENAME)
ef100_update_name(efx);
return NOTIFY_DONE;
diff --git a/drivers/net/ethernet/sfc/efx.c b/drivers/net/ethernet/sfc/efx.c
index f874835e1764..c88e9de9dcd0 100644
--- a/drivers/net/ethernet/sfc/efx.c
+++ b/drivers/net/ethernet/sfc/efx.c
@@ -861,6 +861,7 @@ static void efx_pci_remove_main(struct efx_nic *efx)
*/
static void efx_pci_remove(struct pci_dev *pci_dev)
{
+ struct efx_probe_data *probe_data;
struct efx_nic *efx;
efx = pci_get_drvdata(pci_dev);
@@ -889,6 +890,8 @@ static void efx_pci_remove(struct pci_dev *pci_dev)
efx_fini_struct(efx);
free_netdev(efx->net_dev);
+ probe_data = container_of(efx, struct efx_probe_data, efx);
+ kfree(probe_data);
pci_disable_pcie_error_reporting(pci_dev);
};
@@ -1042,16 +1045,25 @@ static int efx_pci_probe_post_io(struct efx_nic *efx)
static int efx_pci_probe(struct pci_dev *pci_dev,
const struct pci_device_id *entry)
{
+ struct efx_probe_data *probe_data, **probe_ptr;
struct net_device *net_dev;
struct efx_nic *efx;
int rc;
- /* Allocate and initialise a struct net_device and struct efx_nic */
- net_dev = alloc_etherdev_mqs(sizeof(*efx), EFX_MAX_CORE_TX_QUEUES,
- EFX_MAX_RX_QUEUES);
+ /* Allocate probe data and struct efx_nic */
+ probe_data = kzalloc(sizeof(*probe_data), GFP_KERNEL);
+ if (!probe_data)
+ return -ENOMEM;
+ probe_data->pci_dev = pci_dev;
+ efx = &probe_data->efx;
+
+ /* Allocate and initialise a struct net_device */
+ net_dev = alloc_etherdev_mq(sizeof(probe_data), EFX_MAX_CORE_TX_QUEUES);
if (!net_dev)
return -ENOMEM;
- efx = efx_netdev_priv(net_dev);
+ probe_ptr = netdev_priv(net_dev);
+ *probe_ptr = probe_data;
+ efx->net_dev = net_dev;
efx->type = (const struct efx_nic_type *) entry->driver_data;
efx->fixed_features |= NETIF_F_HIGHDMA;
diff --git a/drivers/net/ethernet/sfc/net_driver.h b/drivers/net/ethernet/sfc/net_driver.h
index df93ffd7092a..2228c88a7f31 100644
--- a/drivers/net/ethernet/sfc/net_driver.h
+++ b/drivers/net/ethernet/sfc/net_driver.h
@@ -1166,9 +1166,22 @@ struct efx_nic {
atomic_t n_rx_noskb_drops;
};
+/**
+ * struct efx_probe_data - State after hardware probe
+ * @pci_dev: The PCI device
+ * @efx: Efx NIC details
+ */
+struct efx_probe_data {
+ struct pci_dev *pci_dev;
+ struct efx_nic efx;
+};
+
static inline struct efx_nic *efx_netdev_priv(struct net_device *dev)
{
- return netdev_priv(dev);
+ struct efx_probe_data **probe_ptr = netdev_priv(dev);
+ struct efx_probe_data *probe_data = *probe_ptr;
+
+ return &probe_data->efx;
}
static inline int efx_dev_registered(struct efx_nic *efx)
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