From patchwork Tue Nov 14 13:56:52 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bibek Kumar Patro X-Patchwork-Id: 13455335 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 914AFC4167D for ; Tue, 14 Nov 2023 13:57:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; 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Tue, 14 Nov 2023 13:57:21 GMT Received: from hyd-lablnx450.qualcomm.com (10.80.80.8) by nasanex01c.na.qualcomm.com (10.45.79.139) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.39; Tue, 14 Nov 2023 05:57:16 -0800 From: Bibek Kumar Patro To: , , , , , , , CC: , , , , , Bibek Kumar Patro Subject: [PATCH v2 1/3] iommu/arm-smmu: introduction of ACTLR for custom prefetcher settings Date: Tue, 14 Nov 2023 19:26:52 +0530 Message-ID: <20231114135654.30475-2-quic_bibekkum@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20231114135654.30475-1-quic_bibekkum@quicinc.com> References: <20231114135654.30475-1-quic_bibekkum@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nasanex01c.na.qualcomm.com (10.45.79.139) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: GltvTZ9lulHL0lMFPUwYh9gcU9Kkhz9H X-Proofpoint-GUID: GltvTZ9lulHL0lMFPUwYh9gcU9Kkhz9H X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.987,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-11-14_13,2023-11-09_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 adultscore=0 mlxlogscore=999 priorityscore=1501 phishscore=0 malwarescore=0 impostorscore=0 lowpriorityscore=0 mlxscore=0 spamscore=0 suspectscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311060000 definitions=main-2311140107 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231114_055731_641467_F5D9D5B0 X-CRM114-Status: GOOD ( 26.97 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Currently in Qualcomm SoCs the default prefetch is set to 1 which allows the TLB to fetch just the next page table. MMU-500 features ACTLR register which is implementation defined and is used for Qualcomm SoCs to have a prefetch setting of 1/3/7/15 enabling TLB to prefetch the next set of page tables accordingly allowing for faster translations. ACTLR value is unique for each SMR (Stream matching register) and stored in a pre-populated table. This value is set to the register during context bank initialisation. Signed-off-by: Bibek Kumar Patro --- drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c | 41 ++++++++++++++++++++++ drivers/iommu/arm/arm-smmu/arm-smmu-qcom.h | 2 ++ drivers/iommu/arm/arm-smmu/arm-smmu.c | 5 +-- drivers/iommu/arm/arm-smmu/arm-smmu.h | 5 +++ 4 files changed, 51 insertions(+), 2 deletions(-) -- 2.17.1 diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c index 549ae4dba3a6..578c662c7c30 100644 --- a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c +++ b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c @@ -14,6 +14,17 @@ #define QCOM_DUMMY_VAL -1 +struct actlr_config { + const struct actlr_data *adata; + size_t size; +}; + +struct actlr_data { + u16 sid; + u16 mask; + u32 actlr; +}; + static struct qcom_smmu *to_qcom_smmu(struct arm_smmu_device *smmu) { return container_of(smmu, struct qcom_smmu, smmu); @@ -261,9 +272,36 @@ static const struct of_device_id qcom_smmu_client_of_match[] __maybe_unused = { { } }; +static void arm_smmu_set_actlr(struct arm_smmu_device *smmu, int idx, + const struct actlr_config *actlrcfg) +{ + struct arm_smmu_smr *smr = smmu->smrs; + int i; + u16 id; + u16 mask; + + for (i = 0; i < actlrcfg->size; ++i) { + id = actlrcfg->adata[i].sid; + mask = actlrcfg->adata[i].mask; + if (!smr_is_subset(*smr, id, mask)) + arm_smmu_cb_write(smmu, idx, ARM_SMMU_CB_ACTLR, + actlrcfg->adata[i].actlr); + } +} + static int qcom_smmu_init_context(struct arm_smmu_domain *smmu_domain, struct io_pgtable_cfg *pgtbl_cfg, struct device *dev) { + struct arm_smmu_device *smmu = smmu_domain->smmu; + struct qcom_smmu *qsmmu = to_qcom_smmu(smmu); + const struct actlr_config *actlrcfg; + int idx = smmu_domain->cfg.cbndx; + + if (qsmmu->actlrcfg) { + actlrcfg = qsmmu->actlrcfg; + arm_smmu_set_actlr(smmu, idx, actlrcfg); + } + smmu_domain->cfg.flush_walk_prefer_tlbiasid = true; return 0; @@ -467,6 +505,9 @@ static struct arm_smmu_device *qcom_smmu_create(struct arm_smmu_device *smmu, qsmmu->smmu.impl = impl; qsmmu->cfg = data->cfg; + if (data->actlrcfg && (data->actlrcfg->size)) + qsmmu->actlrcfg = data->actlrcfg; + return &qsmmu->smmu; } diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.h b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.h index 593910567b88..4b6862715070 100644 --- a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.h +++ b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.h @@ -9,6 +9,7 @@ struct qcom_smmu { struct arm_smmu_device smmu; const struct qcom_smmu_config *cfg; + const struct actlr_config *actlrcfg; bool bypass_quirk; u8 bypass_cbndx; u32 stall_enabled; @@ -25,6 +26,7 @@ struct qcom_smmu_config { }; struct qcom_smmu_match_data { + const struct actlr_config *actlrcfg; const struct qcom_smmu_config *cfg; const struct arm_smmu_impl *impl; const struct arm_smmu_impl *adreno_impl; diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu.c b/drivers/iommu/arm/arm-smmu/arm-smmu.c index d6d1a2a55cc0..8e4faf015286 100644 --- a/drivers/iommu/arm/arm-smmu/arm-smmu.c +++ b/drivers/iommu/arm/arm-smmu/arm-smmu.c @@ -990,9 +990,10 @@ static int arm_smmu_find_sme(struct arm_smmu_device *smmu, u16 id, u16 mask) * expect simply identical entries for this case, but there's * no harm in accommodating the generalisation. */ - if ((mask & smrs[i].mask) == mask && - !((id ^ smrs[i].id) & ~smrs[i].mask)) + + if (smr_is_subset(smrs[i], id, mask)) return i; + /* * If the new entry has any other overlap with an existing one, * though, then there always exists at least one stream ID diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu.h b/drivers/iommu/arm/arm-smmu/arm-smmu.h index 703fd5817ec1..b1638bbc41d4 100644 --- a/drivers/iommu/arm/arm-smmu/arm-smmu.h +++ b/drivers/iommu/arm/arm-smmu/arm-smmu.h @@ -501,6 +501,11 @@ static inline void arm_smmu_writeq(struct arm_smmu_device *smmu, int page, writeq_relaxed(val, arm_smmu_page(smmu, page) + offset); } +static inline bool smr_is_subset(struct arm_smmu_smr smrs, u16 id, u16 mask) +{ + return (mask & smrs.mask) == mask && !((id ^ smrs.id) & ~smrs.mask); +} + #define ARM_SMMU_GR0 0 #define ARM_SMMU_GR1 1 #define ARM_SMMU_CB(s, n) ((s)->numpage + (n)) From patchwork Tue Nov 14 13:56:53 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bibek Kumar Patro X-Patchwork-Id: 13455336 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 3BE6AC4332F for ; Tue, 14 Nov 2023 13:58:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; 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Tue, 14 Nov 2023 13:57:27 GMT Received: from hyd-lablnx450.qualcomm.com (10.80.80.8) by nasanex01c.na.qualcomm.com (10.45.79.139) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.39; Tue, 14 Nov 2023 05:57:22 -0800 From: Bibek Kumar Patro To: , , , , , , , CC: , , , , , Bibek Kumar Patro Subject: [PATCH v2 2/3] iommu/arm-smmu: add ACTLR data and support for SM8550 Date: Tue, 14 Nov 2023 19:26:53 +0530 Message-ID: <20231114135654.30475-3-quic_bibekkum@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20231114135654.30475-1-quic_bibekkum@quicinc.com> References: <20231114135654.30475-1-quic_bibekkum@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nasanex01c.na.qualcomm.com (10.45.79.139) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: XbffI96zI-q3OP_M_XGVtx2D4bx4DjXA X-Proofpoint-GUID: XbffI96zI-q3OP_M_XGVtx2D4bx4DjXA X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.987,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-11-14_13,2023-11-09_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 adultscore=0 mlxlogscore=999 priorityscore=1501 phishscore=0 malwarescore=0 impostorscore=0 lowpriorityscore=0 mlxscore=0 spamscore=0 suspectscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311060000 definitions=main-2311140107 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231114_055736_061195_7BB7F522 X-CRM114-Status: GOOD ( 20.36 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add ACTLR data table for SM8550 along with support for same including SM8550 specific implementation operations. Signed-off-by: Bibek Kumar Patro --- drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c | 92 +++++++++++++++++++++- 1 file changed, 88 insertions(+), 4 deletions(-) -- 2.17.1 diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c index 578c662c7c30..0eaf6f2a2e49 100644 --- a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c +++ b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c @@ -25,6 +25,70 @@ struct actlr_data { u32 actlr; }; +#define PRE_FETCH_1 0 +#define PRE_FETCH_2 BIT(8) +#define PRE_FETCH_3 (BIT(9) | BIT(8)) +#define CPRE BIT(1) /* Enable context caching in the prefetch buffer */ +#define CMTLB BIT(0) /* Enable context caching in the macro TLB */ + +static const struct actlr_data sm8550_apps_actlr_data[] = { + { 0x18a0, 0x0000, PRE_FETCH_2 | CPRE | CMTLB }, + { 0x18e0, 0x0000, PRE_FETCH_2 | CPRE | CMTLB }, + { 0x0800, 0x0020, PRE_FETCH_1 | CMTLB }, + { 0x1800, 0x00c0, PRE_FETCH_1 | CMTLB }, + { 0x1820, 0x0000, PRE_FETCH_1 | CMTLB }, + { 0x1860, 0x0000, PRE_FETCH_1 | CMTLB }, + { 0x0c01, 0x0020, PRE_FETCH_3 | CPRE | CMTLB }, + { 0x0c02, 0x0020, PRE_FETCH_3 | CPRE | CMTLB }, + { 0x0c03, 0x0020, PRE_FETCH_3 | CPRE | CMTLB }, + { 0x0c04, 0x0020, PRE_FETCH_3 | CPRE | CMTLB }, + { 0x0c05, 0x0020, PRE_FETCH_3 | CPRE | CMTLB }, + { 0x0c06, 0x0020, PRE_FETCH_3 | CPRE | CMTLB }, + { 0x0c07, 0x0020, PRE_FETCH_3 | CPRE | CMTLB }, + { 0x0c08, 0x0020, PRE_FETCH_3 | CPRE | CMTLB }, + { 0x0c09, 0x0020, PRE_FETCH_3 | CPRE | CMTLB }, + { 0x0c0c, 0x0020, PRE_FETCH_3 | CPRE | CMTLB }, + { 0x0c0d, 0x0020, PRE_FETCH_3 | CPRE | CMTLB }, + { 0x0c0e, 0x0020, PRE_FETCH_3 | CPRE | CMTLB }, + { 0x0c0f, 0x0020, PRE_FETCH_3 | CPRE | CMTLB }, + { 0x1961, 0x0000, PRE_FETCH_3 | CPRE | CMTLB }, + { 0x1962, 0x0000, PRE_FETCH_3 | CPRE | CMTLB }, + { 0x1963, 0x0000, PRE_FETCH_3 | CPRE | CMTLB }, + { 0x1964, 0x0000, PRE_FETCH_3 | CPRE | CMTLB }, + { 0x1965, 0x0000, PRE_FETCH_3 | CPRE | CMTLB }, + { 0x1966, 0x0000, PRE_FETCH_3 | CPRE | CMTLB }, + { 0x1967, 0x0000, PRE_FETCH_3 | CPRE | CMTLB }, + { 0x1968, 0x0000, PRE_FETCH_3 | CPRE | CMTLB }, + { 0x1969, 0x0000, PRE_FETCH_3 | CPRE | CMTLB }, + { 0x196c, 0x0000, PRE_FETCH_3 | CPRE | CMTLB }, + { 0x196d, 0x0000, PRE_FETCH_3 | CPRE | CMTLB }, + { 0x196e, 0x0000, PRE_FETCH_3 | CPRE | CMTLB }, + { 0x196f, 0x0000, PRE_FETCH_3 | CPRE | CMTLB }, + { 0x19c1, 0x0010, PRE_FETCH_3 | CPRE | CMTLB }, + { 0x19c2, 0x0010, PRE_FETCH_3 | CPRE | CMTLB }, + { 0x19c3, 0x0010, PRE_FETCH_3 | CPRE | CMTLB }, + { 0x19c4, 0x0010, PRE_FETCH_3 | CPRE | CMTLB }, + { 0x19c5, 0x0010, PRE_FETCH_3 | CPRE | CMTLB }, + { 0x19c6, 0x0010, PRE_FETCH_3 | CPRE | CMTLB }, + { 0x19c7, 0x0010, PRE_FETCH_3 | CPRE | CMTLB }, + { 0x19c8, 0x0010, PRE_FETCH_3 | CPRE | CMTLB }, + { 0x19c9, 0x0010, PRE_FETCH_3 | CPRE | CMTLB }, + { 0x19cc, 0x0010, PRE_FETCH_3 | CPRE | CMTLB }, + { 0x19cd, 0x0010, PRE_FETCH_3 | CPRE | CMTLB }, + { 0x19ce, 0x0010, PRE_FETCH_3 | CPRE | CMTLB }, + { 0x19cf, 0x0010, PRE_FETCH_3 | CPRE | CMTLB }, + { 0x1c00, 0x0002, PRE_FETCH_2 | CPRE | CMTLB }, + { 0x1c01, 0x0000, PRE_FETCH_1 | CMTLB }, + { 0x1920, 0x0000, PRE_FETCH_2 | CPRE | CMTLB }, + { 0x1923, 0x0000, PRE_FETCH_2 | CPRE | CMTLB }, + { 0x1924, 0x0000, PRE_FETCH_2 | CPRE | CMTLB }, + { 0x1940, 0x0000, PRE_FETCH_2 | CPRE | CMTLB }, + { 0x1941, 0x0004, PRE_FETCH_2 | CPRE | CMTLB }, + { 0x1943, 0x0000, PRE_FETCH_2 | CPRE | CMTLB }, + { 0x1944, 0x0000, PRE_FETCH_2 | CPRE | CMTLB }, + { 0x1947, 0x0000, PRE_FETCH_2 | CPRE | CMTLB }, +}; + static struct qcom_smmu *to_qcom_smmu(struct arm_smmu_device *smmu) { return container_of(smmu, struct qcom_smmu, smmu); @@ -459,6 +523,16 @@ static const struct arm_smmu_impl sdm845_smmu_500_impl = { .tlb_sync = qcom_smmu_tlb_sync, }; + +static const struct arm_smmu_impl sm8550_smmu_500_impl = { + .init_context = qcom_smmu_init_context, + .cfg_probe = qcom_smmu_cfg_probe, + .def_domain_type = qcom_smmu_def_domain_type, + .reset = arm_mmu500_reset, + .write_s2cr = qcom_smmu_write_s2cr, + .tlb_sync = qcom_smmu_tlb_sync, +}; + static const struct arm_smmu_impl qcom_adreno_smmu_v2_impl = { .init_context = qcom_adreno_smmu_init_context, .def_domain_type = qcom_smmu_def_domain_type, @@ -522,6 +596,11 @@ static const struct qcom_smmu_config qcom_smmu_impl0_cfg = { .reg_offset = qcom_smmu_impl0_reg_offset, }; +static const struct actlr_config sm8550_actlrcfg = { + .adata = sm8550_apps_actlr_data, + .size = ARRAY_SIZE(sm8550_apps_actlr_data), +}; + /* * It is not yet possible to use MDP SMMU with the bypass quirk on the msm8996, * there are not enough context banks. @@ -545,16 +624,20 @@ static const struct qcom_smmu_match_data sdm845_smmu_500_data = { /* Also no debug configuration. */ }; + +static const struct qcom_smmu_match_data sm8550_smmu_500_impl0_data = { + .impl = &sm8550_smmu_500_impl, + .adreno_impl = &qcom_adreno_smmu_500_impl, + .cfg = &qcom_smmu_impl0_cfg, + .actlrcfg = &sm8550_actlrcfg, +}; + static const struct qcom_smmu_match_data qcom_smmu_500_impl0_data = { .impl = &qcom_smmu_500_impl, .adreno_impl = &qcom_adreno_smmu_500_impl, .cfg = &qcom_smmu_impl0_cfg, }; -/* - * Do not add any more qcom,SOC-smmu-500 entries to this list, unless they need - * special handling and can not be covered by the qcom,smmu-500 entry. - */ static const struct of_device_id __maybe_unused qcom_smmu_impl_of_match[] = { { .compatible = "qcom,msm8996-smmu-v2", .data = &msm8996_smmu_data }, { .compatible = "qcom,msm8998-smmu-v2", .data = &qcom_smmu_v2_data }, @@ -579,6 +662,7 @@ static const struct of_device_id __maybe_unused qcom_smmu_impl_of_match[] = { { .compatible = "qcom,sm8250-smmu-500", .data = &qcom_smmu_500_impl0_data }, { .compatible = "qcom,sm8350-smmu-500", .data = &qcom_smmu_500_impl0_data }, { .compatible = "qcom,sm8450-smmu-500", .data = &qcom_smmu_500_impl0_data }, + { .compatible = "qcom,sm8550-smmu-500", .data = &sm8550_smmu_500_impl0_data }, { .compatible = "qcom,smmu-500", .data = &qcom_smmu_500_impl0_data }, { } }; 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Tue, 14 Nov 2023 13:57:32 GMT Received: from hyd-lablnx450.qualcomm.com (10.80.80.8) by nasanex01c.na.qualcomm.com (10.45.79.139) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.39; Tue, 14 Nov 2023 05:57:27 -0800 From: Bibek Kumar Patro To: , , , , , , , CC: , , , , , Bibek Kumar Patro Subject: [PATCH v2 3/3] iommu/arm-smmu: re-enable context caching in smmu reset operation Date: Tue, 14 Nov 2023 19:26:54 +0530 Message-ID: <20231114135654.30475-4-quic_bibekkum@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20231114135654.30475-1-quic_bibekkum@quicinc.com> References: <20231114135654.30475-1-quic_bibekkum@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nasanex01c.na.qualcomm.com (10.45.79.139) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: yXLWIZ-FBG2HrZmivcnxivgSACsbpP7V X-Proofpoint-GUID: yXLWIZ-FBG2HrZmivcnxivgSACsbpP7V X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.987,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-11-14_12,2023-11-09_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 spamscore=0 impostorscore=0 lowpriorityscore=0 phishscore=0 adultscore=0 mlxscore=0 bulkscore=0 clxscore=1015 malwarescore=0 mlxlogscore=999 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311060000 definitions=main-2311140107 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231114_055741_544792_288CDFA0 X-CRM114-Status: GOOD ( 20.05 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Context caching is re-enabled in the prefetch buffer for Qualcomm SoCs through SoC specific reset ops, which is disabled in the default MMU-500 reset ops, but is expected for context banks using ACTLR register to retain the prefetch value during reset and runtime suspend. Signed-off-by: Bibek Kumar Patro --- drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c | 25 ++++++++++++++++++---- 1 file changed, 21 insertions(+), 4 deletions(-) -- 2.17.1 diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c index 0eaf6f2a2e49..fa867b1d9d16 100644 --- a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c +++ b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c @@ -478,11 +478,28 @@ static int qcom_smmu_def_domain_type(struct device *dev) return match ? IOMMU_DOMAIN_IDENTITY : 0; } +static int qcom_smmu500_reset(struct arm_smmu_device *smmu) +{ + int i; + u32 reg; + + arm_mmu500_reset(smmu); + + /* Re-enable context caching after reset */ + for (i = 0; i < smmu->num_context_banks; ++i) { + reg = arm_smmu_cb_read(smmu, i, ARM_SMMU_CB_ACTLR); + reg |= CPRE; + arm_smmu_cb_write(smmu, i, ARM_SMMU_CB_ACTLR, reg); + } + + return 0; +} + static int qcom_sdm845_smmu500_reset(struct arm_smmu_device *smmu) { int ret; - arm_mmu500_reset(smmu); + qcom_smmu500_reset(smmu); /* * To address performance degradation in non-real time clients, @@ -509,7 +526,7 @@ static const struct arm_smmu_impl qcom_smmu_500_impl = { .init_context = qcom_smmu_init_context, .cfg_probe = qcom_smmu_cfg_probe, .def_domain_type = qcom_smmu_def_domain_type, - .reset = arm_mmu500_reset, + .reset = qcom_smmu500_reset, .write_s2cr = qcom_smmu_write_s2cr, .tlb_sync = qcom_smmu_tlb_sync, }; @@ -528,7 +545,7 @@ static const struct arm_smmu_impl sm8550_smmu_500_impl = { .init_context = qcom_smmu_init_context, .cfg_probe = qcom_smmu_cfg_probe, .def_domain_type = qcom_smmu_def_domain_type, - .reset = arm_mmu500_reset, + .reset = qcom_smmu500_reset, .write_s2cr = qcom_smmu_write_s2cr, .tlb_sync = qcom_smmu_tlb_sync, }; @@ -544,7 +561,7 @@ static const struct arm_smmu_impl qcom_adreno_smmu_v2_impl = { static const struct arm_smmu_impl qcom_adreno_smmu_500_impl = { .init_context = qcom_adreno_smmu_init_context, .def_domain_type = qcom_smmu_def_domain_type, - .reset = arm_mmu500_reset, + .reset = qcom_smmu500_reset, .alloc_context_bank = qcom_adreno_smmu_alloc_context_bank, .write_sctlr = qcom_adreno_smmu_write_sctlr, .tlb_sync = qcom_smmu_tlb_sync,