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a=rsa-sha256; c=relaxed/relaxed; d=corigine.onmicrosoft.com; s=selector2-corigine-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=WJmb7LFoSdB9cbXXZV/TJ6dLkPJdZDj5X9qvXhk/WV8=; b=jtqlywedrwvxoZGfOLWHq2v/EoUoeNFFzYpOkjRCij2GCiBZRRX9fBM/hKpF05eDwPJz31NKG2GiOOl73ZvWG2YTCLuB+VL775V86SDbQObwoELP/5siLBvRDFTOgsnGIM2m6NhwjFdtbApQDQAohnUZWMHvDNz1j/lcm+XJ3ys= X-Mailman-Original-Authentication-Results: smtp3.osuosl.org; dkim=pass (1024-bit key) header.d=corigine.onmicrosoft.com header.i=@corigine.onmicrosoft.com header.a=rsa-sha256 header.s=selector2-corigine-onmicrosoft-com header.b=jtqlywed X-Mailman-Original-Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=corigine.com; Subject: Re: [Intel-wired-lan] [PATCH net-next v3 6/8] ice: add individual interrupt allocation X-BeenThere: intel-wired-lan@osuosl.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel Wired Ethernet Linux Kernel Driver Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: michal.swiatkowski@intel.com, netdev@vger.kernel.org, jesse.brandeburg@intel.com, intel-wired-lan@lists.osuosl.org, shiraz.saleem@intel.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: intel-wired-lan-bounces@osuosl.org Sender: "Intel-wired-lan" On Thu, Mar 23, 2023 at 01:24:38PM +0100, Piotr Raczynski wrote: > Currently interrupt allocations, depending on a feature are distributed > in batches. Also, after allocation there is a series of operations that > distributes per irq settings through that batch of interrupts. > > Although driver does not yet support dynamic interrupt allocation, keep > allocated interrupts in a pool and add allocation abstraction logic to > make code more flexible. Keep per interrupt information in the > ice_q_vector structure, which yields ice_vsi::base_vector redundant. > Also, as a result there are a few functions that can be removed. > > Reviewed-by: Jacob Keller > Reviewed-by: Michal Swiatkowski > Signed-off-by: Piotr Raczynski Reviewed-by: Simon Horman I've made a few minor observations inline. I don't think there is a need to respin for any of them. > --- > drivers/net/ethernet/intel/ice/ice.h | 11 +- > drivers/net/ethernet/intel/ice/ice_arfs.c | 5 +- > drivers/net/ethernet/intel/ice/ice_base.c | 36 ++- > drivers/net/ethernet/intel/ice/ice_ethtool.c | 2 +- > drivers/net/ethernet/intel/ice/ice_idc.c | 45 ++-- > drivers/net/ethernet/intel/ice/ice_irq.c | 46 +++- > drivers/net/ethernet/intel/ice/ice_irq.h | 3 + > drivers/net/ethernet/intel/ice/ice_lib.c | 225 ++----------------- Nice code removal from ice_lib.c :) > drivers/net/ethernet/intel/ice/ice_lib.h | 4 +- > drivers/net/ethernet/intel/ice/ice_main.c | 44 ++-- > drivers/net/ethernet/intel/ice/ice_ptp.c | 2 +- > drivers/net/ethernet/intel/ice/ice_sriov.c | 2 +- > drivers/net/ethernet/intel/ice/ice_xsk.c | 5 +- > 13 files changed, 154 insertions(+), 276 deletions(-) ... > diff --git a/drivers/net/ethernet/intel/ice/ice_base.c b/drivers/net/ethernet/intel/ice/ice_base.c > index 1911d644dfa8..e5db23eaa3f4 100644 > --- a/drivers/net/ethernet/intel/ice/ice_base.c > +++ b/drivers/net/ethernet/intel/ice/ice_base.c > @@ -118,9 +118,31 @@ static int ice_vsi_alloc_q_vector(struct ice_vsi *vsi, u16 v_idx) > q_vector->rx.itr_mode = ITR_DYNAMIC; > q_vector->tx.type = ICE_TX_CONTAINER; > q_vector->rx.type = ICE_RX_CONTAINER; > + q_vector->irq.index = -ENOENT; > > - if (vsi->type == ICE_VSI_VF) > + if (vsi->type == ICE_VSI_VF) { > + q_vector->reg_idx = ice_calc_vf_reg_idx(vsi->vf, q_vector); > goto out; > + } else if (vsi->type == ICE_VSI_CTRL && vsi->vf) { > + struct ice_vsi *ctrl_vsi = ice_get_vf_ctrl_vsi(pf, vsi); > + > + if (ctrl_vsi) { > + if (unlikely(!ctrl_vsi->q_vectors)) > + return -ENOENT; > + q_vector->irq = ctrl_vsi->q_vectors[0]->irq; > + goto skip_alloc; nit: I think goto for error paths is very much the norm. But, FWIIW, I would have avoided using goto here. > + } > + } > + > + q_vector->irq = ice_alloc_irq(pf); > + if (q_vector->irq.index < 0) { > + kfree(q_vector); > + return -ENOMEM; > + } > + > +skip_alloc: > + q_vector->reg_idx = q_vector->irq.index; > + > /* only set affinity_mask if the CPU is online */ > if (cpu_online(v_idx)) > cpumask_set_cpu(v_idx, &q_vector->affinity_mask); > @@ -168,6 +190,18 @@ static void ice_free_q_vector(struct ice_vsi *vsi, int v_idx) > if (vsi->netdev) > netif_napi_del(&q_vector->napi); > > + /* release MSIX interrupt if q_vector had interrupt allocated */ > + if (q_vector->irq.index < 0) > + goto free_q_vector; > + > + /* only free last VF ctrl vsi interrupt */ > + if (vsi->type == ICE_VSI_CTRL && vsi->vf && > + ice_get_vf_ctrl_vsi(pf, vsi)) > + goto free_q_vector; Ditto (x2). > + > + ice_free_irq(pf, q_vector->irq); > + > +free_q_vector: > devm_kfree(dev, q_vector); > vsi->q_vectors[v_idx] = NULL; > } ... > diff --git a/drivers/net/ethernet/intel/ice/ice_irq.c b/drivers/net/ethernet/intel/ice/ice_irq.c > index f61be5d76373..ca1a1de26766 100644 > --- a/drivers/net/ethernet/intel/ice/ice_irq.c > +++ b/drivers/net/ethernet/intel/ice/ice_irq.c > @@ -194,9 +194,53 @@ int ice_init_interrupt_scheme(struct ice_pf *pf) > } > > /* populate SW interrupts pool with number of OS granted IRQs. */ > - pf->num_avail_sw_msix = (u16)vectors; > pf->irq_tracker->num_entries = (u16)vectors; > pf->irq_tracker->end = pf->irq_tracker->num_entries; > > return 0; > } > + > +/** > + * ice_alloc_irq - Allocate new interrupt vector > + * @pf: board private structure > + * > + * Allocate new interrupt vector for a given owner id. > + * return struct msi_map with interrupt details and track > + * allocated interrupt appropriately. > + * > + * This function mimics individual interrupt allocation, > + * even interrupts are actually already allocated with > + * pci_alloc_irq_vectors. Individual allocation helps > + * to track interrupts and simplifies interrupt related > + * handling. > + * > + * On failure, return map with negative .index. The caller > + * is expected to check returned map index. > + * > + */ > +struct msi_map ice_alloc_irq(struct ice_pf *pf) > +{ > + struct msi_map map = { .index = -ENOENT }; > + int entry; > + > + entry = ice_get_res(pf, pf->irq_tracker); > + if (entry < 0) nit: map.index could be initialised here. > + return map; > + > + map.index = entry; > + map.virq = pci_irq_vector(pf->pdev, map.index); > + > + return map; > +} _______________________________________________ Intel-wired-lan mailing list Intel-wired-lan@osuosl.org https://lists.osuosl.org/mailman/listinfo/intel-wired-lan