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Message-Id: <1454499925-16359-15-git-send-email-jakub.kicinski@netronome.com>
Date: Wed, 3 Feb 2016 11:45:20 +0000
From: Jakub Kicinski <jakub.kicinski@...ronome.com>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org,
Jakub Kicinski <jakub.kicinski@...ronome.com>
Subject: [RFC (v3) 14/19] nfp: slice .ndo_open() and .ndo_stop() up
Divide .ndo_open() and .ndo_stop() into logical, callable
chunks. No functional changes.
Signed-off-by: Jakub Kicinski <jakub.kicinski@...ronome.com>
---
.../net/ethernet/netronome/nfp/nfp_net_common.c | 213 +++++++++++++--------
1 file changed, 131 insertions(+), 82 deletions(-)
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
index 34f933f19059..4ce17cb95e6f 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
@@ -1671,6 +1671,77 @@ nfp_net_vec_write_ring_data(struct nfp_net *nn, struct nfp_net_r_vector *r_vec,
}
/**
+ * nfp_net_set_config_and_enable() - Write control BAR and enable NFP
+ * @nn: NFP Net device to reconfigure
+ */
+static int nfp_net_set_config_and_enable(struct nfp_net *nn)
+{
+ u32 new_ctrl, update = 0;
+ unsigned int r;
+ int err;
+
+ new_ctrl = nn->ctrl;
+
+ if (nn->cap & NFP_NET_CFG_CTRL_RSS) {
+ nfp_net_rss_write_key(nn);
+ nfp_net_rss_write_itbl(nn);
+ nn_writel(nn, NFP_NET_CFG_RSS_CTRL, nn->rss_cfg);
+ update |= NFP_NET_CFG_UPDATE_RSS;
+ }
+
+ if (nn->cap & NFP_NET_CFG_CTRL_IRQMOD) {
+ nfp_net_coalesce_write_cfg(nn);
+
+ new_ctrl |= NFP_NET_CFG_CTRL_IRQMOD;
+ update |= NFP_NET_CFG_UPDATE_IRQMOD;
+ }
+
+ for (r = 0; r < nn->num_r_vecs; r++)
+ nfp_net_vec_write_ring_data(nn, &nn->r_vecs[r], r);
+
+ nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, nn->num_tx_rings == 64 ?
+ 0xffffffffffffffffULL : ((u64)1 << nn->num_tx_rings) - 1);
+
+ nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, nn->num_rx_rings == 64 ?
+ 0xffffffffffffffffULL : ((u64)1 << nn->num_rx_rings) - 1);
+
+ nfp_net_write_mac_addr(nn, nn->netdev->dev_addr);
+
+ nn_writel(nn, NFP_NET_CFG_MTU, nn->netdev->mtu);
+ nn_writel(nn, NFP_NET_CFG_FLBUFSZ, nn->fl_bufsz);
+
+ /* Enable device */
+ new_ctrl |= NFP_NET_CFG_CTRL_ENABLE;
+ update |= NFP_NET_CFG_UPDATE_GEN;
+ update |= NFP_NET_CFG_UPDATE_MSIX;
+ update |= NFP_NET_CFG_UPDATE_RING;
+ if (nn->cap & NFP_NET_CFG_CTRL_RINGCFG)
+ new_ctrl |= NFP_NET_CFG_CTRL_RINGCFG;
+
+ nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl);
+ err = nfp_net_reconfig(nn, update);
+ if (err)
+ goto err_clear_config;
+
+ nn->ctrl = new_ctrl;
+
+ /* Since reconfiguration requests while NFP is down are ignored we
+ * have to wipe the entire VXLAN configuration and reinitialize it.
+ */
+ if (nn->ctrl & NFP_NET_CFG_CTRL_VXLAN) {
+ memset(&nn->vxlan_ports, 0, sizeof(nn->vxlan_ports));
+ memset(&nn->vxlan_usecnt, 0, sizeof(nn->vxlan_usecnt));
+ vxlan_get_rx_port(nn->netdev);
+ }
+
+ return 0;
+
+err_clear_config:
+ nfp_net_clear_config_and_disable(nn);
+ return err;
+}
+
+/**
* nfp_net_start_vec() - Start ring vector
* @nn: NFP Net device structure
* @r_vec: Ring vector to be started
@@ -1690,20 +1761,33 @@ nfp_net_start_vec(struct nfp_net *nn, struct nfp_net_r_vector *r_vec)
enable_irq(irq_vec);
}
+/**
+ * nfp_net_open_stack() - Start the device from stack's perspective
+ * @nn: NFP Net device to reconfigure
+ */
+static void nfp_net_open_stack(struct nfp_net *nn)
+{
+ unsigned int r;
+
+ for (r = 0; r < nn->num_r_vecs; r++)
+ nfp_net_start_vec(nn, &nn->r_vecs[r]);
+
+ netif_tx_wake_all_queues(nn->netdev);
+
+ enable_irq(nn->irq_entries[NFP_NET_CFG_LSC].vector);
+ nfp_net_read_link_status(nn);
+}
+
static int nfp_net_netdev_open(struct net_device *netdev)
{
struct nfp_net *nn = netdev_priv(netdev);
int err, r;
- u32 update = 0;
- u32 new_ctrl;
if (nn->ctrl & NFP_NET_CFG_CTRL_ENABLE) {
nn_err(nn, "Dev is already enabled: 0x%08x\n", nn->ctrl);
return -EBUSY;
}
- new_ctrl = nn->ctrl;
-
/* Step 1: Allocate resources for rings and the like
* - Request interrupts
* - Allocate RX and TX ring resources
@@ -1756,20 +1840,6 @@ static int nfp_net_netdev_open(struct net_device *netdev)
if (err)
goto err_free_rings;
- if (nn->cap & NFP_NET_CFG_CTRL_RSS) {
- nfp_net_rss_write_key(nn);
- nfp_net_rss_write_itbl(nn);
- nn_writel(nn, NFP_NET_CFG_RSS_CTRL, nn->rss_cfg);
- update |= NFP_NET_CFG_UPDATE_RSS;
- }
-
- if (nn->cap & NFP_NET_CFG_CTRL_IRQMOD) {
- nfp_net_coalesce_write_cfg(nn);
-
- new_ctrl |= NFP_NET_CFG_CTRL_IRQMOD;
- update |= NFP_NET_CFG_UPDATE_IRQMOD;
- }
-
/* Step 2: Configure the NFP
* - Enable rings from 0 to tx_rings/rx_rings - 1.
* - Write MAC address (in case it changed)
@@ -1777,43 +1847,9 @@ static int nfp_net_netdev_open(struct net_device *netdev)
* - Set the Freelist buffer size
* - Enable the FW
*/
- for (r = 0; r < nn->num_r_vecs; r++)
- nfp_net_vec_write_ring_data(nn, &nn->r_vecs[r], r);
-
- nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, nn->num_tx_rings == 64 ?
- 0xffffffffffffffffULL : ((u64)1 << nn->num_tx_rings) - 1);
-
- nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, nn->num_rx_rings == 64 ?
- 0xffffffffffffffffULL : ((u64)1 << nn->num_rx_rings) - 1);
-
- nfp_net_write_mac_addr(nn, netdev->dev_addr);
-
- nn_writel(nn, NFP_NET_CFG_MTU, netdev->mtu);
- nn_writel(nn, NFP_NET_CFG_FLBUFSZ, nn->fl_bufsz);
-
- /* Enable device */
- new_ctrl |= NFP_NET_CFG_CTRL_ENABLE;
- update |= NFP_NET_CFG_UPDATE_GEN;
- update |= NFP_NET_CFG_UPDATE_MSIX;
- update |= NFP_NET_CFG_UPDATE_RING;
- if (nn->cap & NFP_NET_CFG_CTRL_RINGCFG)
- new_ctrl |= NFP_NET_CFG_CTRL_RINGCFG;
-
- nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl);
- err = nfp_net_reconfig(nn, update);
+ err = nfp_net_set_config_and_enable(nn);
if (err)
- goto err_clear_config;
-
- nn->ctrl = new_ctrl;
-
- /* Since reconfiguration requests while NFP is down are ignored we
- * have to wipe the entire VXLAN configuration and reinitialize it.
- */
- if (nn->ctrl & NFP_NET_CFG_CTRL_VXLAN) {
- memset(&nn->vxlan_ports, 0, sizeof(nn->vxlan_ports));
- memset(&nn->vxlan_usecnt, 0, sizeof(nn->vxlan_usecnt));
- vxlan_get_rx_port(netdev);
- }
+ goto err_free_rings;
/* Step 3: Enable for kernel
* - put some freelist descriptors on each RX ring
@@ -1821,18 +1857,10 @@ static int nfp_net_netdev_open(struct net_device *netdev)
* - enable all TX queues
* - set link state
*/
- for (r = 0; r < nn->num_r_vecs; r++)
- nfp_net_start_vec(nn, &nn->r_vecs[r]);
-
- netif_tx_wake_all_queues(netdev);
-
- enable_irq(nn->irq_entries[NFP_NET_CFG_LSC].vector);
- nfp_net_read_link_status(nn);
+ nfp_net_open_stack(nn);
return 0;
-err_clear_config:
- nfp_net_clear_config_and_disable(nn);
err_free_rings:
r = nn->num_r_vecs;
err_free_prev_vecs:
@@ -1856,36 +1884,31 @@ err_free_exn:
}
/**
- * nfp_net_netdev_close() - Called when the device is downed
- * @netdev: netdev structure
+ * nfp_net_close_stack() - Quiescent the stack (part of close)
+ * @nn: NFP Net device to reconfigure
*/
-static int nfp_net_netdev_close(struct net_device *netdev)
+static void nfp_net_close_stack(struct nfp_net *nn)
{
- struct nfp_net *nn = netdev_priv(netdev);
- int r;
-
- if (!(nn->ctrl & NFP_NET_CFG_CTRL_ENABLE)) {
- nn_err(nn, "Dev is not up: 0x%08x\n", nn->ctrl);
- return 0;
- }
+ unsigned int r;
- /* Step 1: Disable RX and TX rings from the Linux kernel perspective
- */
disable_irq(nn->irq_entries[NFP_NET_CFG_LSC].vector);
- netif_carrier_off(netdev);
+ netif_carrier_off(nn->netdev);
nn->link_up = false;
for (r = 0; r < nn->num_r_vecs; r++)
napi_disable(&nn->r_vecs[r].napi);
- netif_tx_disable(netdev);
+ netif_tx_disable(nn->netdev);
+}
- /* Step 2: Tell NFP
- */
- nfp_net_clear_config_and_disable(nn);
+/**
+ * nfp_net_close_free_all() - Free all runtime resources
+ * @nn: NFP Net device to reconfigure
+ */
+static void nfp_net_close_free_all(struct nfp_net *nn)
+{
+ unsigned int r;
- /* Step 3: Free resources
- */
for (r = 0; r < nn->num_r_vecs; r++) {
nfp_net_rx_ring_reset(nn->r_vecs[r].rx_ring);
nfp_net_rx_ring_bufs_free(nn, nn->r_vecs[r].rx_ring);
@@ -1900,6 +1923,32 @@ static int nfp_net_netdev_close(struct net_device *netdev)
nfp_net_aux_irq_free(nn, NFP_NET_CFG_LSC, NFP_NET_IRQ_LSC_IDX);
nfp_net_aux_irq_free(nn, NFP_NET_CFG_EXN, NFP_NET_IRQ_EXN_IDX);
+}
+
+/**
+ * nfp_net_netdev_close() - Called when the device is downed
+ * @netdev: netdev structure
+ */
+static int nfp_net_netdev_close(struct net_device *netdev)
+{
+ struct nfp_net *nn = netdev_priv(netdev);
+
+ if (!(nn->ctrl & NFP_NET_CFG_CTRL_ENABLE)) {
+ nn_err(nn, "Dev is not up: 0x%08x\n", nn->ctrl);
+ return 0;
+ }
+
+ /* Step 1: Disable RX and TX rings from the Linux kernel perspective
+ */
+ nfp_net_close_stack(nn);
+
+ /* Step 2: Tell NFP
+ */
+ nfp_net_clear_config_and_disable(nn);
+
+ /* Step 3: Free resources
+ */
+ nfp_net_close_free_all(nn);
nn_dbg(nn, "%s down", netdev->name);
return 0;
--
1.9.1
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