diff mbox series

[V2,8/9] bnxt_en: Add TPH support in BNXT driver

Message ID 20240531213841.3246055-9-wei.huang2@amd.com (mailing list archive)
State Not Applicable
Delegated to: Netdev Maintainers
Headers show
Series PCIe TPH and cache direct injection support | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Guessed tree name to be net-next
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit fail Errors and warnings before: 902 this patch: 904
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers success CCed 5 of 5 maintainers
netdev/build_clang success Errors and warnings before: 906 this patch: 906
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn fail Errors and warnings before: 910 this patch: 912
netdev/checkpatch warning WARNING: line length of 82 exceeds 80 columns WARNING: line length of 92 exceeds 80 columns
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 2 this patch: 2
netdev/source_inline fail Was 0 now: 1

Commit Message

Wei Huang May 31, 2024, 9:38 p.m. UTC 
From: Manoj Panicker <manoj.panicker2@amd.com>

As a usage example, this patch implements TPH support in Broadcom BNXT
device driver by invoking pcie_tph_set_st() function when interrupt
affinity is changed.

Signed-off-by: Manoj Panicker <manoj.panicker2@amd.com>
Reviewed-by: Wei Huang <wei.huang2@amd.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
Reviewed-by: Somnath Kotur <somnath.kotur@broadcom.com> 
Reviewed-by: Andy Gospodarek <andrew.gospodarek@broadcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 54 +++++++++++++++++++++++
 drivers/net/ethernet/broadcom/bnxt/bnxt.h |  4 ++
 2 files changed, 58 insertions(+)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index c437ca1c0fd3..2207dac8ce18 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -55,6 +55,7 @@ 
 #include <net/page_pool/helpers.h>
 #include <linux/align.h>
 #include <net/netdev_queues.h>
+#include <linux/pci-tph.h>
 
 #include "bnxt_hsi.h"
 #include "bnxt.h"
@@ -10683,6 +10684,8 @@  static void bnxt_free_irq(struct bnxt *bp)
 				free_cpumask_var(irq->cpu_mask);
 				irq->have_cpumask = 0;
 			}
+			if (pcie_tph_intr_vec_supported(bp->pdev))
+				irq_set_affinity_notifier(irq->vector, NULL);
 			free_irq(irq->vector, bp->bnapi[i]);
 		}
 
@@ -10690,6 +10693,45 @@  static void bnxt_free_irq(struct bnxt *bp)
 	}
 }
 
+static void bnxt_rtnl_lock_sp(struct bnxt *bp);
+static void bnxt_rtnl_unlock_sp(struct bnxt *bp);
+static void __bnxt_irq_affinity_notify(struct irq_affinity_notify *notify,
+				       const cpumask_t *mask)
+{
+	struct bnxt_irq *irq;
+
+	irq = container_of(notify, struct bnxt_irq, affinity_notify);
+	cpumask_copy(irq->cpu_mask, mask);
+
+	if (!pcie_tph_set_st(irq->bp->pdev, irq->msix_nr,
+			     cpumask_first(irq->cpu_mask),
+			     TPH_MEM_TYPE_VM, PCI_TPH_REQ_TPH_ONLY))
+		netdev_dbg(irq->bp->dev, "error in setting steering tag\n");
+
+	if (netif_running(irq->bp->dev)) {
+		rtnl_lock();
+		bnxt_close_nic(irq->bp, false, false);
+		bnxt_open_nic(irq->bp, false, false);
+		rtnl_unlock();
+	}
+}
+
+static void __bnxt_irq_affinity_release(struct kref __always_unused *ref)
+{
+}
+
+static inline void bnxt_register_affinity_notifier(struct bnxt_irq *irq)
+{
+	struct irq_affinity_notify *notify;
+
+	notify = &irq->affinity_notify;
+	notify->irq = irq->vector;
+	notify->notify = __bnxt_irq_affinity_notify;
+	notify->release = __bnxt_irq_affinity_release;
+
+	irq_set_affinity_notifier(irq->vector, notify);
+}
+
 static int bnxt_request_irq(struct bnxt *bp)
 {
 	int i, j, rc = 0;
@@ -10735,6 +10777,7 @@  static int bnxt_request_irq(struct bnxt *bp)
 			int numa_node = dev_to_node(&bp->pdev->dev);
 
 			irq->have_cpumask = 1;
+			irq->msix_nr = map_idx;
 			cpumask_set_cpu(cpumask_local_spread(i, numa_node),
 					irq->cpu_mask);
 			rc = irq_set_affinity_hint(irq->vector, irq->cpu_mask);
@@ -10744,6 +10787,17 @@  static int bnxt_request_irq(struct bnxt *bp)
 					    irq->vector);
 				break;
 			}
+
+			if (pcie_tph_intr_vec_supported(bp->pdev)) {
+				irq->bp = bp;
+				bnxt_register_affinity_notifier(irq);
+
+				/* first setup */
+				if (!pcie_tph_set_st(bp->pdev, i,
+						     cpumask_first(irq->cpu_mask),
+						     TPH_MEM_TYPE_VM, PCI_TPH_REQ_TPH_ONLY))
+					netdev_dbg(bp->dev, "error in setting steering tag\n");
+			}
 		}
 	}
 	return rc;
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
index 656ab81c0272..4a841e8ccfb7 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
@@ -1195,6 +1195,10 @@  struct bnxt_irq {
 	u8		have_cpumask:1;
 	char		name[IFNAMSIZ + 2];
 	cpumask_var_t	cpu_mask;
+
+	int		msix_nr;
+	struct bnxt	*bp;
+	struct irq_affinity_notify affinity_notify;
 };
 
 #define HWRM_RING_ALLOC_TX	0x1