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Message-ID: <20240823195657.31588-6-michael.chan@broadcom.com>
Date: Fri, 23 Aug 2024 12:56:53 -0700
From: Michael Chan <michael.chan@...adcom.com>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org,
edumazet@...gle.com,
kuba@...nel.org,
pabeni@...hat.com,
pavan.chebbi@...adcom.com,
andrew.gospodarek@...adcom.com,
horms@...nel.org,
helgaas@...nel.org,
przemyslaw.kitszel@...el.com,
Kalesh AP <kalesh-anakkur.purayil@...adcom.com>,
Somnath Kotur <somnath.kotur@...adcom.com>,
Hongguang Gao <hongguang.gao@...adcom.com>
Subject: [PATCH net-next v3 5/9] bnxt_en: Remove BNXT_FLAG_USING_MSIX flag
Now that we only support MSIX, the BNXT_FLAG_USING_MSIX is always true.
Remove it and any if conditions checking for it. Remove the INTX
handler and associated logic.
Reviewed-by: Kalesh AP <kalesh-anakkur.purayil@...adcom.com>
Reviewed-by: Somnath Kotur <somnath.kotur@...adcom.com>
Reviewed-by: Hongguang Gao <hongguang.gao@...adcom.com>
Reviewed-by: Simon Horman <horms@...nel.org>
Signed-off-by: Michael Chan <michael.chan@...adcom.com>
---
drivers/net/ethernet/broadcom/bnxt/bnxt.c | 99 ++++---------------
drivers/net/ethernet/broadcom/bnxt/bnxt.h | 1 -
.../net/ethernet/broadcom/bnxt/bnxt_sriov.c | 5 -
3 files changed, 17 insertions(+), 88 deletions(-)
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index b5a5c4911143..67f09e22a25c 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -2854,34 +2854,6 @@ static inline int bnxt_has_work(struct bnxt *bp, struct bnxt_cp_ring_info *cpr)
return TX_CMP_VALID(txcmp, raw_cons);
}
-static irqreturn_t bnxt_inta(int irq, void *dev_instance)
-{
- struct bnxt_napi *bnapi = dev_instance;
- struct bnxt *bp = bnapi->bp;
- struct bnxt_cp_ring_info *cpr = &bnapi->cp_ring;
- u32 cons = RING_CMP(cpr->cp_raw_cons);
- u32 int_status;
-
- prefetch(&cpr->cp_desc_ring[CP_RING(cons)][CP_IDX(cons)]);
-
- if (!bnxt_has_work(bp, cpr)) {
- int_status = readl(bp->bar0 + BNXT_CAG_REG_LEGACY_INT_STATUS);
- /* return if erroneous interrupt */
- if (!(int_status & (0x10000 << cpr->cp_ring_struct.fw_ring_id)))
- return IRQ_NONE;
- }
-
- /* disable ring IRQ */
- BNXT_CP_DB_IRQ_DIS(cpr->cp_db.doorbell);
-
- /* Return here if interrupt is shared and is disabled. */
- if (unlikely(atomic_read(&bp->intr_sem) != 0))
- return IRQ_HANDLED;
-
- napi_schedule(&bnapi->napi);
- return IRQ_HANDLED;
-}
-
static int __bnxt_poll_work(struct bnxt *bp, struct bnxt_cp_ring_info *cpr,
int budget)
{
@@ -6876,15 +6848,14 @@ static int hwrm_ring_alloc_send_msg(struct bnxt *bp,
req->cq_handle = cpu_to_le64(ring->handle);
req->enables |= cpu_to_le32(
RING_ALLOC_REQ_ENABLES_NQ_RING_ID_VALID);
- } else if (bp->flags & BNXT_FLAG_USING_MSIX) {
+ } else {
req->int_mode = RING_ALLOC_REQ_INT_MODE_MSIX;
}
break;
case HWRM_RING_ALLOC_NQ:
req->ring_type = RING_ALLOC_REQ_RING_TYPE_NQ;
req->length = cpu_to_le32(bp->cp_ring_mask + 1);
- if (bp->flags & BNXT_FLAG_USING_MSIX)
- req->int_mode = RING_ALLOC_REQ_INT_MODE_MSIX;
+ req->int_mode = RING_ALLOC_REQ_INT_MODE_MSIX;
break;
default:
netdev_err(bp->dev, "hwrm alloc invalid ring type %d\n",
@@ -10653,20 +10624,6 @@ static void bnxt_setup_msix(struct bnxt *bp)
}
}
-static void bnxt_setup_inta(struct bnxt *bp)
-{
- const int len = sizeof(bp->irq_tbl[0].name);
-
- if (bp->num_tc) {
- netdev_reset_tc(bp->dev);
- bp->num_tc = 0;
- }
-
- snprintf(bp->irq_tbl[0].name, len, "%s-%s-%d", bp->dev->name, "TxRx",
- 0);
- bp->irq_tbl[0].handler = bnxt_inta;
-}
-
static int bnxt_init_int_mode(struct bnxt *bp);
static int bnxt_setup_int_mode(struct bnxt *bp)
@@ -10679,10 +10636,7 @@ static int bnxt_setup_int_mode(struct bnxt *bp)
return rc ?: -ENODEV;
}
- if (bp->flags & BNXT_FLAG_USING_MSIX)
- bnxt_setup_msix(bp);
- else
- bnxt_setup_inta(bp);
+ bnxt_setup_msix(bp);
rc = bnxt_set_real_num_queues(bp);
return rc;
@@ -10823,7 +10777,6 @@ static int bnxt_init_int_mode(struct bnxt *bp)
rc = -ENOMEM;
goto msix_setup_exit;
}
- bp->flags |= BNXT_FLAG_USING_MSIX;
kfree(msix_ent);
return 0;
@@ -10838,12 +10791,10 @@ static int bnxt_init_int_mode(struct bnxt *bp)
static void bnxt_clear_int_mode(struct bnxt *bp)
{
- if (bp->flags & BNXT_FLAG_USING_MSIX)
- pci_disable_msix(bp->pdev);
+ pci_disable_msix(bp->pdev);
kfree(bp->irq_tbl);
bp->irq_tbl = NULL;
- bp->flags &= ~BNXT_FLAG_USING_MSIX;
}
int bnxt_reserve_rings(struct bnxt *bp, bool irq_re_init)
@@ -10941,9 +10892,6 @@ static int bnxt_request_irq(struct bnxt *bp)
#ifdef CONFIG_RFS_ACCEL
rmap = bp->dev->rx_cpu_rmap;
#endif
- if (!(bp->flags & BNXT_FLAG_USING_MSIX))
- flags = IRQF_SHARED;
-
for (i = 0, j = 0; i < bp->cp_nr_rings; i++) {
int map_idx = bnxt_cp_num_to_irq_num(bp, i);
struct bnxt_irq *irq = &bp->irq_tbl[map_idx];
@@ -11008,29 +10956,22 @@ static void bnxt_del_napi(struct bnxt *bp)
static void bnxt_init_napi(struct bnxt *bp)
{
- int i;
+ int (*poll_fn)(struct napi_struct *, int) = bnxt_poll;
unsigned int cp_nr_rings = bp->cp_nr_rings;
struct bnxt_napi *bnapi;
+ int i;
- if (bp->flags & BNXT_FLAG_USING_MSIX) {
- int (*poll_fn)(struct napi_struct *, int) = bnxt_poll;
-
- if (bp->flags & BNXT_FLAG_CHIP_P5_PLUS)
- poll_fn = bnxt_poll_p5;
- else if (BNXT_CHIP_TYPE_NITRO_A0(bp))
- cp_nr_rings--;
- for (i = 0; i < cp_nr_rings; i++) {
- bnapi = bp->bnapi[i];
- netif_napi_add(bp->dev, &bnapi->napi, poll_fn);
- }
- if (BNXT_CHIP_TYPE_NITRO_A0(bp)) {
- bnapi = bp->bnapi[cp_nr_rings];
- netif_napi_add(bp->dev, &bnapi->napi,
- bnxt_poll_nitroa0);
- }
- } else {
- bnapi = bp->bnapi[0];
- netif_napi_add(bp->dev, &bnapi->napi, bnxt_poll);
+ if (bp->flags & BNXT_FLAG_CHIP_P5_PLUS)
+ poll_fn = bnxt_poll_p5;
+ else if (BNXT_CHIP_TYPE_NITRO_A0(bp))
+ cp_nr_rings--;
+ for (i = 0; i < cp_nr_rings; i++) {
+ bnapi = bp->bnapi[i];
+ netif_napi_add(bp->dev, &bnapi->napi, poll_fn);
+ }
+ if (BNXT_CHIP_TYPE_NITRO_A0(bp)) {
+ bnapi = bp->bnapi[cp_nr_rings];
+ netif_napi_add(bp->dev, &bnapi->napi, bnxt_poll_nitroa0);
}
}
@@ -12149,12 +12090,6 @@ static int __bnxt_open_nic(struct bnxt *bp, bool irq_re_init, bool link_re_init)
rc = bnxt_reserve_rings(bp, irq_re_init);
if (rc)
return rc;
- if ((bp->flags & BNXT_FLAG_RFS) &&
- !(bp->flags & BNXT_FLAG_USING_MSIX)) {
- /* disable RFS if falling back to INTA */
- bp->dev->hw_features &= ~NETIF_F_NTUPLE;
- bp->flags &= ~BNXT_FLAG_RFS;
- }
rc = bnxt_alloc_mem(bp, irq_re_init);
if (rc) {
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
index 9192cf26c871..b1903a1617f1 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
@@ -2199,7 +2199,6 @@ struct bnxt {
#define BNXT_FLAG_STRIP_VLAN 0x20
#define BNXT_FLAG_AGG_RINGS (BNXT_FLAG_JUMBO | BNXT_FLAG_GRO | \
BNXT_FLAG_LRO)
- #define BNXT_FLAG_USING_MSIX 0x40
#define BNXT_FLAG_RFS 0x100
#define BNXT_FLAG_SHARED_RINGS 0x200
#define BNXT_FLAG_PORT_STATS 0x400
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c
index 58bd84b59f0e..7bb8a5d74430 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c
@@ -902,11 +902,6 @@ int bnxt_sriov_configure(struct pci_dev *pdev, int num_vfs)
struct net_device *dev = pci_get_drvdata(pdev);
struct bnxt *bp = netdev_priv(dev);
- if (!(bp->flags & BNXT_FLAG_USING_MSIX)) {
- netdev_warn(dev, "Not allow SRIOV if the irq mode is not MSIX\n");
- return 0;
- }
-
rtnl_lock();
if (!netif_running(dev)) {
netdev_warn(dev, "Reject SRIOV config request since if is down!\n");
--
2.30.1
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