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Wed, 18 Jun 2025 02:24:57 -0700 (PDT) Received: from localhost.localdomain ([192.19.203.250]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-7488ffecd08sm10408993b3a.27.2025.06.18.02.24.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 18 Jun 2025 02:24:57 -0700 (PDT) From: Vikas Gupta To: davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, andrew+netdev@lunn.ch, horms@kernel.org Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, michael.chan@broadcom.com, pavan.chebbi@broadcom.com, vsrama-krishna.nemani@broadcom.com, Vikas Gupta , Bhargava Chenna Marreddy , Rajashekar Hudumula Subject: [net-next, 08/10] bng_en: Add irq allocation support Date: Wed, 18 Jun 2025 14:47:38 +0000 Message-ID: <20250618144743.843815-9-vikas.gupta@broadcom.com> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20250618144743.843815-1-vikas.gupta@broadcom.com> References: <20250618144743.843815-1-vikas.gupta@broadcom.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add irq allocation functions. This will help to allocate IRQs to both netdev and RoCE aux devices. Signed-off-by: Vikas Gupta Reviewed-by: Bhargava Chenna Marreddy Reviewed-by: Rajashekar Hudumula --- drivers/net/ethernet/broadcom/bnge/bnge.h | 3 + .../net/ethernet/broadcom/bnge/bnge_resc.c | 69 +++++++++++++++++++ .../net/ethernet/broadcom/bnge/bnge_resc.h | 13 ++++ 3 files changed, 85 insertions(+) diff --git a/drivers/net/ethernet/broadcom/bnge/bnge.h b/drivers/net/ethern= et/broadcom/bnge/bnge.h index b58d8fc6f258..3c161b1a9b62 100644 --- a/drivers/net/ethernet/broadcom/bnge/bnge.h +++ b/drivers/net/ethernet/broadcom/bnge/bnge.h @@ -172,6 +172,9 @@ struct bnge_dev { #define BNGE_SUPPORTS_TPA(bd) ((bd)->max_tpa_v2) =20 u8 num_tc; + + struct bnge_irq *irq_tbl; + u16 irqs_acquired; }; =20 static inline bool bnge_is_roce_en(struct bnge_dev *bd) diff --git a/drivers/net/ethernet/broadcom/bnge/bnge_resc.c b/drivers/net/e= thernet/broadcom/bnge/bnge_resc.c index 68e094474822..84f91e05a2b0 100644 --- a/drivers/net/ethernet/broadcom/bnge/bnge_resc.c +++ b/drivers/net/ethernet/broadcom/bnge/bnge_resc.c @@ -326,3 +326,72 @@ int bnge_reserve_rings(struct bnge_dev *bd) =20 return rc; } + +int bnge_alloc_irqs(struct bnge_dev *bd) +{ + u16 aux_msix, tx_cp, num_entries; + u16 irqs_demand, max, min =3D 1; + int i, rc =3D 0; + + irqs_demand =3D bnge_nqs_demand(bd); + max =3D bnge_get_max_func_irqs(bd); + if (irqs_demand > max) + irqs_demand =3D max; + + if (!(bd->flags & BNGE_EN_SHARED_CHNL)) + min =3D 2; + + irqs_demand =3D pci_alloc_irq_vectors(bd->pdev, min, irqs_demand, + PCI_IRQ_MSIX); + aux_msix =3D bnge_aux_get_msix(bd); + if (irqs_demand < 0 || irqs_demand < aux_msix) { + rc =3D -ENODEV; + goto err_free_irqs; + } + + num_entries =3D irqs_demand; + if (pci_msix_can_alloc_dyn(bd->pdev)) + num_entries =3D max; + bd->irq_tbl =3D kcalloc(num_entries, sizeof(*bd->irq_tbl), GFP_KERNEL); + if (!bd->irq_tbl) { + rc =3D -ENOMEM; + goto err_free_irqs; + } + + for (i =3D 0; i < irqs_demand; i++) + bd->irq_tbl[i].vector =3D pci_irq_vector(bd->pdev, i); + + bd->irqs_acquired =3D irqs_demand; + /* Reduce rings based upon num of vectors allocated. + * We dont need to consider NQs as they have been calculated + * and must be more than irqs_demand. + */ + rc =3D bnge_adjust_rings(bd, &bd->rx_nr_rings, + &bd->tx_nr_rings, + irqs_demand - aux_msix, min =3D=3D 1); + if (rc) + goto err_free_irqs; + + tx_cp =3D bnge_num_tx_to_cp(bd, bd->tx_nr_rings); + bd->nq_nr_rings =3D (min =3D=3D 1) ? + max_t(u16, tx_cp, bd->rx_nr_rings) : + tx_cp + bd->rx_nr_rings; + + /* Readjust tx_nr_rings_per_tc */ + if (!bd->num_tc) + bd->tx_nr_rings_per_tc =3D bd->tx_nr_rings; + + return 0; + +err_free_irqs: + dev_err(bd->dev, "Failed to allocate IRQs err =3D %d\n", rc); + bnge_free_irqs(bd); + return rc; +} + +void bnge_free_irqs(struct bnge_dev *bd) +{ + pci_free_irq_vectors(bd->pdev); + kfree(bd->irq_tbl); + bd->irq_tbl =3D NULL; +} diff --git a/drivers/net/ethernet/broadcom/bnge/bnge_resc.h b/drivers/net/e= thernet/broadcom/bnge/bnge_resc.h index c6cef514588f..23db93e03787 100644 --- a/drivers/net/ethernet/broadcom/bnge/bnge_resc.h +++ b/drivers/net/ethernet/broadcom/bnge/bnge_resc.h @@ -51,8 +51,21 @@ struct bnge_hw_rings { u16 rss_ctx; }; =20 +/* "TXRX", 2 hypens, plus maximum integer */ +#define BNGE_IRQ_NAME_EXTRA 17 +struct bnge_irq { + irq_handler_t handler; + unsigned int vector; + u8 requested:1; + u8 have_cpumask:1; + char name[IFNAMSIZ + BNGE_IRQ_NAME_EXTRA]; + cpumask_var_t cpu_mask; +}; + int bnge_reserve_rings(struct bnge_dev *bd); int bnge_fix_rings_count(u16 *rx, u16 *tx, u16 max, bool shared); +int bnge_alloc_irqs(struct bnge_dev *bd); +void bnge_free_irqs(struct bnge_dev *bd); =20 static inline u32 bnge_adjust_pow_two(u32 total_ent, u16 ent_per_blk) --=20 2.47.1