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Tue, 17 Dec 2019 08:27:09 -0500 X-MC-Unique: D7gd0hVnNieBrcFWJ_UiaQ-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 265F68017DF; Tue, 17 Dec 2019 13:27:07 +0000 (UTC) Received: from [10.36.116.117] (ovpn-116-117.ams2.redhat.com [10.36.116.117]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 24A2060C63; Tue, 17 Dec 2019 13:27:02 +0000 (UTC) Subject: Re: [PATCH v3 05/13] iommu/arm-smmu-v3: Prepare arm_smmu_s1_cfg for SSID support To: Jean-Philippe Brucker , linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-acpi@vger.kernel.org, devicetree@vger.kernel.org, iommu@lists.linux-foundation.org References: <20191209180514.272727-1-jean-philippe@linaro.org> <20191209180514.272727-6-jean-philippe@linaro.org> From: Auger Eric Message-ID: <7b20be5c-0b3f-dbec-ffd6-508b4667cf1b@redhat.com> Date: Tue, 17 Dec 2019 14:27:01 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0 MIME-Version: 1.0 In-Reply-To: <20191209180514.272727-6-jean-philippe@linaro.org> Content-Language: en-US X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191217_052715_914772_BE751242 X-CRM114-Status: GOOD ( 20.55 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mark.rutland@arm.com, lorenzo.pieralisi@arm.com, robin.murphy@arm.com, joro@8bytes.org, guohanjun@huawei.com, rjw@rjwysocki.net, robh+dt@kernel.org, jonathan.cameron@huawei.com, sudeep.holla@arm.com, bhelgaas@google.com, zhangfei.gao@linaro.org, will@kernel.org, lenb@kernel.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Jean, On 12/9/19 7:05 PM, Jean-Philippe Brucker wrote: > When adding SSID support to the SMMUv3 driver, we'll need to manipulate > leaf pasid tables and context descriptors. Extract the context > descriptor structure and introduce a new table structure. > > Signed-off-by: Jean-Philippe Brucker Reviewed-by: Eric Auger Thanks Eric > --- > drivers/iommu/arm-smmu-v3.c | 44 +++++++++++++++++++++---------------- > 1 file changed, 25 insertions(+), 19 deletions(-) > > diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c > index 837b4283b4dc..b287e303b1d7 100644 > --- a/drivers/iommu/arm-smmu-v3.c > +++ b/drivers/iommu/arm-smmu-v3.c > @@ -553,16 +553,21 @@ struct arm_smmu_strtab_l1_desc { > dma_addr_t l2ptr_dma; > }; > > +struct arm_smmu_ctx_desc { > + u16 asid; > + u64 ttbr; > + u64 tcr; > + u64 mair; > +}; > + > +struct arm_smmu_cd_table { > + __le64 *ptr; > + dma_addr_t ptr_dma; > +}; > + > struct arm_smmu_s1_cfg { > - __le64 *cdptr; > - dma_addr_t cdptr_dma; > - > - struct arm_smmu_ctx_desc { > - u16 asid; > - u64 ttbr; > - u64 tcr; > - u64 mair; > - } cd; > + struct arm_smmu_cd_table table; > + struct arm_smmu_ctx_desc cd; > }; > > struct arm_smmu_s2_cfg { > @@ -1471,6 +1476,7 @@ static void arm_smmu_write_ctx_desc(struct arm_smmu_device *smmu, > struct arm_smmu_s1_cfg *cfg) > { > u64 val; > + __le64 *cdptr = cfg->table.ptr; > > /* > * We don't need to issue any invalidation here, as we'll invalidate > @@ -1488,12 +1494,12 @@ static void arm_smmu_write_ctx_desc(struct arm_smmu_device *smmu, > if (smmu->features & ARM_SMMU_FEAT_STALL_FORCE) > val |= CTXDESC_CD_0_S; > > - cfg->cdptr[0] = cpu_to_le64(val); > + cdptr[0] = cpu_to_le64(val); > > val = cfg->cd.ttbr & CTXDESC_CD_1_TTB0_MASK; > - cfg->cdptr[1] = cpu_to_le64(val); > + cdptr[1] = cpu_to_le64(val); > > - cfg->cdptr[3] = cpu_to_le64(cfg->cd.mair); > + cdptr[3] = cpu_to_le64(cfg->cd.mair); > } > > /* Stream table manipulation functions */ > @@ -1624,7 +1630,7 @@ static void arm_smmu_write_strtab_ent(struct arm_smmu_master *master, u32 sid, > !(smmu->features & ARM_SMMU_FEAT_STALL_FORCE)) > dst[1] |= cpu_to_le64(STRTAB_STE_1_S1STALLD); > > - val |= (s1_cfg->cdptr_dma & STRTAB_STE_0_S1CTXPTR_MASK) | > + val |= (s1_cfg->table.ptr_dma & STRTAB_STE_0_S1CTXPTR_MASK) | > FIELD_PREP(STRTAB_STE_0_CFG, STRTAB_STE_0_CFG_S1_TRANS); > } > > @@ -2138,11 +2144,11 @@ static void arm_smmu_domain_free(struct iommu_domain *domain) > if (smmu_domain->stage == ARM_SMMU_DOMAIN_S1) { > struct arm_smmu_s1_cfg *cfg = &smmu_domain->s1_cfg; > > - if (cfg->cdptr) { > + if (cfg->table.ptr) { > dmam_free_coherent(smmu_domain->smmu->dev, > CTXDESC_CD_DWORDS << 3, > - cfg->cdptr, > - cfg->cdptr_dma); > + cfg->table.ptr, > + cfg->table.ptr_dma); > > arm_smmu_bitmap_free(smmu->asid_map, cfg->cd.asid); > } > @@ -2167,9 +2173,9 @@ static int arm_smmu_domain_finalise_s1(struct arm_smmu_domain *smmu_domain, > if (asid < 0) > return asid; > > - cfg->cdptr = dmam_alloc_coherent(smmu->dev, CTXDESC_CD_DWORDS << 3, > - &cfg->cdptr_dma, GFP_KERNEL); > - if (!cfg->cdptr) { > + cfg->table.ptr = dmam_alloc_coherent(smmu->dev, CTXDESC_CD_DWORDS << 3, > + &cfg->table.ptr_dma, GFP_KERNEL); > + if (!cfg->table.ptr) { > dev_warn(smmu->dev, "failed to allocate context descriptor\n"); > ret = -ENOMEM; > goto out_free_asid; > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel