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[124.171.83.152]) by smtp.gmail.com with ESMTPSA id nl11sm3969341pjb.0.2020.07.14.21.02.20 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 14 Jul 2020 21:02:21 -0700 (PDT) Subject: Re: [PATCH 13/15] powerpc/powernv/sriov: Move M64 BAR allocation into a helper To: Oliver O'Halloran , linuxppc-dev@lists.ozlabs.org References: <20200710052340.737567-1-oohall@gmail.com> <20200710052340.737567-14-oohall@gmail.com> From: Alexey Kardashevskiy Autocrypt: addr=aik@ozlabs.ru; keydata= mQINBE+rT0sBEADFEI2UtPRsLLvnRf+tI9nA8T91+jDK3NLkqV+2DKHkTGPP5qzDZpRSH6mD EePO1JqpVuIow/wGud9xaPA5uvuVgRS1q7RU8otD+7VLDFzPRiRE4Jfr2CW89Ox6BF+q5ZPV /pS4v4G9eOrw1v09lEKHB9WtiBVhhxKK1LnUjPEH3ifkOkgW7jFfoYgTdtB3XaXVgYnNPDFo PTBYsJy+wr89XfyHr2Ev7BB3Xaf7qICXdBF8MEVY8t/UFsesg4wFWOuzCfqxFmKEaPDZlTuR tfLAeVpslNfWCi5ybPlowLx6KJqOsI9R2a9o4qRXWGP7IwiMRAC3iiPyk9cknt8ee6EUIxI6 t847eFaVKI/6WcxhszI0R6Cj+N4y+1rHfkGWYWupCiHwj9DjILW9iEAncVgQmkNPpUsZECLT 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XrB5p+6ML7Bd84xOEGsj/vdaXmz1esuH7BOZAGEZfLRCHJ0GVCSssg== Message-ID: <0377246c-26db-a39b-a231-7486615b5ad4@ozlabs.ru> Date: Wed, 15 Jul 2020 14:02:19 +1000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <20200710052340.737567-14-oohall@gmail.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On 10/07/2020 15:23, Oliver O'Halloran wrote: > I want to refactor the loop this code is currently inside of. Hoist it on > out. > > Signed-off-by: Oliver O'Halloran Reviewed-by: Alexey Kardashevskiy > --- > arch/powerpc/platforms/powernv/pci-sriov.c | 31 ++++++++++++++-------- > 1 file changed, 20 insertions(+), 11 deletions(-) > > diff --git a/arch/powerpc/platforms/powernv/pci-sriov.c b/arch/powerpc/platforms/powernv/pci-sriov.c > index d5699cd2ab7a..2f967aa4fbf5 100644 > --- a/arch/powerpc/platforms/powernv/pci-sriov.c > +++ b/arch/powerpc/platforms/powernv/pci-sriov.c > @@ -416,6 +416,23 @@ static int64_t pnv_ioda_map_m64_single(struct pnv_phb *phb, > return rc; > } > > +static int pnv_pci_alloc_m64_bar(struct pnv_phb *phb, struct pnv_iov_data *iov) > +{ > + int win; > + > + do { > + win = find_next_zero_bit(&phb->ioda.m64_bar_alloc, > + phb->ioda.m64_bar_idx + 1, 0); > + > + if (win >= phb->ioda.m64_bar_idx + 1) > + return -1; > + } while (test_and_set_bit(win, &phb->ioda.m64_bar_alloc)); > + > + set_bit(win, iov->used_m64_bar_mask); > + > + return win; > +} > + > static int pnv_pci_vf_assign_m64(struct pci_dev *pdev, u16 num_vfs) > { > struct pnv_iov_data *iov; > @@ -443,17 +460,9 @@ static int pnv_pci_vf_assign_m64(struct pci_dev *pdev, u16 num_vfs) > continue; > > for (j = 0; j < m64_bars; j++) { > - > - /* allocate a window ID for this BAR */ > - do { > - win = find_next_zero_bit(&phb->ioda.m64_bar_alloc, > - phb->ioda.m64_bar_idx + 1, 0); > - > - if (win >= phb->ioda.m64_bar_idx + 1) > - goto m64_failed; > - } while (test_and_set_bit(win, &phb->ioda.m64_bar_alloc)); > - set_bit(win, iov->used_m64_bar_mask); > - > + win = pnv_pci_alloc_m64_bar(phb, iov); > + if (win < 0) > + goto m64_failed; > > if (iov->m64_single_mode) { > int pe_num = iov->vf_pe_arr[j].pe_number; > -- Alexey