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Message-Id: <20241024-remove_vic_resource_limits-v2-4-039b8cae5fdd@cisco.com>
Date: Thu, 24 Oct 2024 18:19:46 -0700
From: Nelson Escobar via B4 Relay <devnull+neescoba.cisco.com@...nel.org>
To: John Daley <johndale@...co.com>, Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
Christian Benvenuti <benve@...co.com>, Satish Kharat <satishkh@...co.com>,
Andrew Lunn <andrew+netdev@...n.ch>,
"David S. Miller" <davem@...emloft.net>
Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
Nelson Escobar <neescoba@...co.com>, Simon Horman <horms@...nel.org>
Subject: [PATCH net-next v2 4/5] enic: Allocate arrays in enic struct based
on VIC config
From: Nelson Escobar <neescoba@...co.com>
Allocate wq, rq, cq, intr, and napi arrays based on the number of
resources configured in the VIC.
Co-developed-by: John Daley <johndale@...co.com>
Signed-off-by: John Daley <johndale@...co.com>
Co-developed-by: Satish Kharat <satishkh@...co.com>
Signed-off-by: Satish Kharat <satishkh@...co.com>
Signed-off-by: Nelson Escobar <neescoba@...co.com>
Reviewed-by: Simon Horman <horms@...nel.org>
---
drivers/net/ethernet/cisco/enic/enic.h | 24 ++++-----
drivers/net/ethernet/cisco/enic/enic_main.c | 84 ++++++++++++++++++++++++++---
2 files changed, 87 insertions(+), 21 deletions(-)
diff --git a/drivers/net/ethernet/cisco/enic/enic.h b/drivers/net/ethernet/cisco/enic/enic.h
index 1f32413a8f7c690060fe385b50f7447943e72596..cfb4667953de2c578911aad138a1d392fa9d3bdc 100644
--- a/drivers/net/ethernet/cisco/enic/enic.h
+++ b/drivers/net/ethernet/cisco/enic/enic.h
@@ -23,10 +23,8 @@
#define ENIC_BARS_MAX 6
-#define ENIC_WQ_MAX 8
-#define ENIC_RQ_MAX 8
-#define ENIC_CQ_MAX (ENIC_WQ_MAX + ENIC_RQ_MAX)
-#define ENIC_INTR_MAX (ENIC_CQ_MAX + 2)
+#define ENIC_WQ_MAX 256
+#define ENIC_RQ_MAX 256
#define ENIC_WQ_NAPI_BUDGET 256
@@ -184,8 +182,8 @@ struct enic {
struct work_struct reset;
struct work_struct tx_hang_reset;
struct work_struct change_mtu_work;
- struct msix_entry msix_entry[ENIC_INTR_MAX];
- struct enic_msix_entry msix[ENIC_INTR_MAX];
+ struct msix_entry *msix_entry;
+ struct enic_msix_entry *msix;
u32 msg_enable;
spinlock_t devcmd_lock;
u8 mac_addr[ETH_ALEN];
@@ -204,28 +202,24 @@ struct enic {
bool enic_api_busy;
struct enic_port_profile *pp;
- /* work queue cache line section */
- ____cacheline_aligned struct enic_wq wq[ENIC_WQ_MAX];
+ struct enic_wq *wq;
unsigned int wq_avail;
unsigned int wq_count;
u16 loop_enable;
u16 loop_tag;
- /* receive queue cache line section */
- ____cacheline_aligned struct enic_rq rq[ENIC_RQ_MAX];
+ struct enic_rq *rq;
unsigned int rq_avail;
unsigned int rq_count;
struct vxlan_offload vxlan;
- struct napi_struct napi[ENIC_RQ_MAX + ENIC_WQ_MAX];
+ struct napi_struct *napi;
- /* interrupt resource cache line section */
- ____cacheline_aligned struct vnic_intr intr[ENIC_INTR_MAX];
+ struct vnic_intr *intr;
unsigned int intr_avail;
unsigned int intr_count;
u32 __iomem *legacy_pba; /* memory-mapped */
- /* completion queue cache line section */
- ____cacheline_aligned struct vnic_cq cq[ENIC_CQ_MAX];
+ struct vnic_cq *cq;
unsigned int cq_avail;
unsigned int cq_count;
struct enic_rfs_flw_tbl rfs_h;
diff --git a/drivers/net/ethernet/cisco/enic/enic_main.c b/drivers/net/ethernet/cisco/enic/enic_main.c
index eb00058b6c68ec5c1ac433b54b5bc6f3fb613777..564202e81a711a6791bef7e848627f0a439cc6f3 100644
--- a/drivers/net/ethernet/cisco/enic/enic_main.c
+++ b/drivers/net/ethernet/cisco/enic/enic_main.c
@@ -940,7 +940,7 @@ static void enic_get_stats(struct net_device *netdev,
net_stats->rx_errors = stats->rx.rx_errors;
net_stats->multicast = stats->rx.rx_multicast_frames_ok;
- for (i = 0; i < ENIC_RQ_MAX; i++) {
+ for (i = 0; i < enic->rq_count; i++) {
struct enic_rq_stats *rqs = &enic->rq[i].stats;
if (!enic->rq[i].vrq.ctrl)
@@ -1792,7 +1792,7 @@ static void enic_free_intr(struct enic *enic)
free_irq(enic->pdev->irq, enic);
break;
case VNIC_DEV_INTR_MODE_MSIX:
- for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
+ for (i = 0; i < enic->intr_count; i++)
if (enic->msix[i].requested)
free_irq(enic->msix_entry[i].vector,
enic->msix[i].devid);
@@ -1859,7 +1859,7 @@ static int enic_request_intr(struct enic *enic)
enic->msix[intr].isr = enic_isr_msix_notify;
enic->msix[intr].devid = enic;
- for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
+ for (i = 0; i < enic->intr_count; i++)
enic->msix[i].requested = 0;
for (i = 0; i < enic->intr_count; i++) {
@@ -2456,8 +2456,7 @@ static int enic_set_intr_mode(struct enic *enic)
* (the last INTR is used for notifications)
*/
- BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2);
- for (i = 0; i < n + m + 2; i++)
+ for (i = 0; i < enic->intr_avail; i++)
enic->msix_entry[i].entry = i;
/* Use multiple RQs if RSS is enabled
@@ -2674,6 +2673,71 @@ static const struct netdev_stat_ops enic_netdev_stat_ops = {
.get_base_stats = enic_get_base_stats,
};
+static void enic_free_enic_resources(struct enic *enic)
+{
+ kfree(enic->wq);
+ enic->wq = NULL;
+
+ kfree(enic->rq);
+ enic->rq = NULL;
+
+ kfree(enic->cq);
+ enic->cq = NULL;
+
+ kfree(enic->napi);
+ enic->napi = NULL;
+
+ kfree(enic->msix_entry);
+ enic->msix_entry = NULL;
+
+ kfree(enic->msix);
+ enic->msix = NULL;
+
+ kfree(enic->intr);
+ enic->intr = NULL;
+}
+
+static int enic_alloc_enic_resources(struct enic *enic)
+{
+ enic->wq = kcalloc(enic->wq_avail, sizeof(struct enic_wq), GFP_KERNEL);
+ if (!enic->wq)
+ goto free_queues;
+
+ enic->rq = kcalloc(enic->rq_avail, sizeof(struct enic_rq), GFP_KERNEL);
+ if (!enic->rq)
+ goto free_queues;
+
+ enic->cq = kcalloc(enic->cq_avail, sizeof(struct vnic_cq), GFP_KERNEL);
+ if (!enic->cq)
+ goto free_queues;
+
+ enic->napi = kcalloc(enic->wq_avail + enic->rq_avail,
+ sizeof(struct napi_struct), GFP_KERNEL);
+ if (!enic->napi)
+ goto free_queues;
+
+ enic->msix_entry = kcalloc(enic->intr_avail, sizeof(struct msix_entry),
+ GFP_KERNEL);
+ if (!enic->msix_entry)
+ goto free_queues;
+
+ enic->msix = kcalloc(enic->intr_avail, sizeof(struct enic_msix_entry),
+ GFP_KERNEL);
+ if (!enic->msix)
+ goto free_queues;
+
+ enic->intr = kcalloc(enic->intr_avail, sizeof(struct vnic_intr),
+ GFP_KERNEL);
+ if (!enic->intr)
+ goto free_queues;
+
+ return 0;
+
+free_queues:
+ enic_free_enic_resources(enic);
+ return -ENOMEM;
+}
+
static void enic_dev_deinit(struct enic *enic)
{
unsigned int i;
@@ -2691,6 +2755,7 @@ static void enic_dev_deinit(struct enic *enic)
enic_free_vnic_resources(enic);
enic_clear_intr_mode(enic);
enic_free_affinity_hint(enic);
+ enic_free_enic_resources(enic);
}
static void enic_kdump_kernel_config(struct enic *enic)
@@ -2734,6 +2799,12 @@ static int enic_dev_init(struct enic *enic)
enic_get_res_counts(enic);
+ err = enic_alloc_enic_resources(enic);
+ if (err) {
+ dev_err(dev, "Failed to allocate enic resources\n");
+ return err;
+ }
+
/* modify resource count if we are in kdump_kernel
*/
enic_kdump_kernel_config(enic);
@@ -2746,7 +2817,7 @@ static int enic_dev_init(struct enic *enic)
if (err) {
dev_err(dev, "Failed to set intr mode based on resource "
"counts and system capabilities, aborting\n");
- return err;
+ goto err_out_free_vnic_resources;
}
/* Allocate and configure vNIC resources
@@ -2788,6 +2859,7 @@ static int enic_dev_init(struct enic *enic)
enic_free_affinity_hint(enic);
enic_clear_intr_mode(enic);
enic_free_vnic_resources(enic);
+ enic_free_enic_resources(enic);
return err;
}
--
2.47.0
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