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Fri, 06 Dec 2024 13:36:33 -0800 (PST) Received: from mini ([2601:646:8f03:9fe0:b125:86cb:737b:2a61]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-215f8efc5efsm33065775ad.150.2024.12.06.13.36.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 06 Dec 2024 13:36:32 -0800 (PST) From: Fan Ni X-Google-Original-From: Fan Ni Date: Fri, 6 Dec 2024 13:36:29 -0800 To: alejandro.lucero-palau@amd.com Cc: linux-cxl@vger.kernel.org, netdev@vger.kernel.org, dan.j.williams@intel.com, martin.habets@xilinx.com, edward.cree@amd.com, davem@davemloft.net, kuba@kernel.org, pabeni@redhat.com, edumazet@google.com, dave.jiang@intel.com, Alejandro Lucero Subject: Re: [PATCH v6 16/28] sfc: obtain root decoder with enough HPA free space Message-ID: References: <20241202171222.62595-1-alejandro.lucero-palau@amd.com> <20241202171222.62595-17-alejandro.lucero-palau@amd.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20241202171222.62595-17-alejandro.lucero-palau@amd.com> On Mon, Dec 02, 2024 at 05:12:10PM +0000, alejandro.lucero-palau@amd.com wrote: > From: Alejandro Lucero > > Asking for availbale HPA space is the previous step to try to obtain /availbale/available/ Fan > an HPA range suitable to accel driver purposes. > > Add this call to efx cxl initialization. > > Signed-off-by: Alejandro Lucero > --- > drivers/net/ethernet/sfc/efx_cxl.c | 18 ++++++++++++++++++ > 1 file changed, 18 insertions(+) > > diff --git a/drivers/net/ethernet/sfc/efx_cxl.c b/drivers/net/ethernet/sfc/efx_cxl.c > index d03fa9f9c421..79b93d92f9c2 100644 > --- a/drivers/net/ethernet/sfc/efx_cxl.c > +++ b/drivers/net/ethernet/sfc/efx_cxl.c > @@ -26,6 +26,7 @@ int efx_cxl_init(struct efx_probe_data *probe_data) > struct pci_dev *pci_dev; > struct efx_cxl *cxl; > struct resource res; > + resource_size_t max; > u16 dvsec; > int rc; > > @@ -102,6 +103,23 @@ int efx_cxl_init(struct efx_probe_data *probe_data) > goto err3; > } > > + cxl->cxlrd = cxl_get_hpa_freespace(cxl->cxlmd, > + CXL_DECODER_F_RAM | CXL_DECODER_F_TYPE2, > + &max); > + > + if (IS_ERR(cxl->cxlrd)) { > + pci_err(pci_dev, "cxl_get_hpa_freespace failed\n"); > + rc = PTR_ERR(cxl->cxlrd); > + goto err3; > + } > + > + if (max < EFX_CTPIO_BUFFER_SIZE) { > + pci_err(pci_dev, "%s: no enough free HPA space %llu < %u\n", > + __func__, max, EFX_CTPIO_BUFFER_SIZE); > + rc = -ENOSPC; > + goto err3; > + } > + > probe_data->cxl = cxl; > > return 0; > -- > 2.17.1 >