diff mbox series

[v8,5/7] iommu/arm-smmu: Add implementation for the adreno GPU SMMU

Message ID 20200611222128.28826-6-jcrouse@codeaurora.org
State Superseded
Headers show
Series iommu/arm-smmu: Enable split pagetable support | expand

Commit Message

Jordan Crouse June 11, 2020, 10:21 p.m. UTC
Add a special implementation for the SMMU attached to most Adreno GPU
target triggered from the qcom,adreno-gpu-smmu compatible string. When
selected the driver will attempt to enable split pagetables.

Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
---

 drivers/iommu/arm-smmu-impl.c |  3 +++
 drivers/iommu/arm-smmu-qcom.c | 45 +++++++++++++++++++++++++++++++++--
 drivers/iommu/arm-smmu.h      |  1 +
 3 files changed, 47 insertions(+), 2 deletions(-)

Comments

kernel test robot June 12, 2020, 5:11 a.m. UTC | #1
Hi Jordan,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on linus/master]
[also build test ERROR on next-20200611]
[cannot apply to iommu/next robh/for-next arm/for-next keystone/next rockchip/for-next arm64/for-next/core shawnguo/for-next soc/for-next v5.7]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Jordan-Crouse/iommu-arm-smmu-Enable-split-pagetable-support/20200612-094718
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git b961f8dc8976c091180839f4483d67b7c2ca2578
config: arm64-randconfig-s031-20200612 (attached as .config)
compiler: aarch64-linux-gcc (GCC) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.1-250-g42323db3-dirty
        # save the attached .config to linux build tree
        make W=1 C=1 ARCH=arm64 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__'

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All error/warnings (new ones prefixed by >>, old ones prefixed by <<):

drivers/iommu/arm-smmu-qcom.c: In function 'qcom_adreno_smmu_is_gpu_device':
>> drivers/iommu/arm-smmu-qcom.c:17:49: error: 'smmu_domain->dev' is a pointer; did you mean to use '->'?
17 |  return of_device_is_compatible(smmu_domain->dev.of_node, "qcom,adreno");
|                                                 ^
|                                                 ->
>> drivers/iommu/arm-smmu-qcom.c:18:1: warning: control reaches end of non-void function [-Wreturn-type]
18 | }
| ^

vim +17 drivers/iommu/arm-smmu-qcom.c

    14	
    15	static bool qcom_adreno_smmu_is_gpu_device(struct arm_smmu_domain *smmu_domain)
    16	{
  > 17		return of_device_is_compatible(smmu_domain->dev.of_node, "qcom,adreno");
  > 18	}
    19	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
kernel test robot June 13, 2020, 1:34 a.m. UTC | #2
Hi Jordan,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on linus/master]
[also build test ERROR on next-20200612]
[cannot apply to iommu/next robh/for-next arm/for-next keystone/next rockchip/for-next arm64/for-next/core shawnguo/for-next soc/for-next v5.7]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Jordan-Crouse/iommu-arm-smmu-Enable-split-pagetable-support/20200612-094718
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git b961f8dc8976c091180839f4483d67b7c2ca2578
config: arm64-randconfig-r026-20200612 (attached as .config)
compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 3b43f006294971b8049d4807110032169780e5b8)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install arm64 cross compiling tool for clang build
        # apt-get install binutils-aarch64-linux-gnu
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>, old ones prefixed by <<):

>> drivers/iommu/arm-smmu-qcom.c:17:49: error: member reference type 'struct device *' is a pointer; did you mean to use '->'?
return of_device_is_compatible(smmu_domain->dev.of_node, "qcom,adreno");
~~~~~~~~~~~~~~~~^
->
1 error generated.

vim +17 drivers/iommu/arm-smmu-qcom.c

    14	
    15	static bool qcom_adreno_smmu_is_gpu_device(struct arm_smmu_domain *smmu_domain)
    16	{
  > 17		return of_device_is_compatible(smmu_domain->dev.of_node, "qcom,adreno");
    18	}
    19	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
diff mbox series

Patch

diff --git a/drivers/iommu/arm-smmu-impl.c b/drivers/iommu/arm-smmu-impl.c
index a20e426d81ac..309675cf6699 100644
--- a/drivers/iommu/arm-smmu-impl.c
+++ b/drivers/iommu/arm-smmu-impl.c
@@ -176,5 +176,8 @@  struct arm_smmu_device *arm_smmu_impl_init(struct arm_smmu_device *smmu)
 	    of_device_is_compatible(np, "qcom,sc7180-smmu-500"))
 		return qcom_smmu_impl_init(smmu);
 
+	if (of_device_is_compatible(smmu->dev->of_node, "qcom,adreno-smmu"))
+		return qcom_adreno_smmu_impl_init(smmu);
+
 	return smmu;
 }
diff --git a/drivers/iommu/arm-smmu-qcom.c b/drivers/iommu/arm-smmu-qcom.c
index cf01d0215a39..6d0ab4865fc7 100644
--- a/drivers/iommu/arm-smmu-qcom.c
+++ b/drivers/iommu/arm-smmu-qcom.c
@@ -12,6 +12,29 @@  struct qcom_smmu {
 	struct arm_smmu_device smmu;
 };
 
+static bool qcom_adreno_smmu_is_gpu_device(struct arm_smmu_domain *smmu_domain)
+{
+	return of_device_is_compatible(smmu_domain->dev.of_node, "qcom,adreno");
+}
+
+static int qcom_adreno_smmu_init_context(struct arm_smmu_domain *smmu_domain,
+		struct io_pgtable_cfg *pgtbl_cfg)
+{
+	/* TTBR1 is only for the GPU stream ID and not the GMU */
+	if (!qcom_adreno_smmu_is_gpu_device(smmu_domain))
+		return 0;
+	/*
+	 * All targets that use the qcom,adreno-smmu compatible string *should*
+	 * be AARCH64 stage 1 but double check because the arm-smmu code assumes
+	 * that is the case when the TTBR1 quirk is enabled
+	 */
+	if ((smmu_domain->stage == ARM_SMMU_DOMAIN_S1) &&
+	    (smmu_domain->cfg.fmt == ARM_SMMU_CTX_FMT_AARCH64))
+		pgtbl_cfg->quirks |= IO_PGTABLE_QUIRK_ARM_TTBR1;
+
+	return 0;
+}
+
 static const struct of_device_id qcom_smmu_client_of_match[] = {
 	{ .compatible = "qcom,adreno" },
 	{ .compatible = "qcom,mdp4" },
@@ -65,7 +88,15 @@  static const struct arm_smmu_impl qcom_smmu_impl = {
 	.reset = qcom_smmu500_reset,
 };
 
-struct arm_smmu_device *qcom_smmu_impl_init(struct arm_smmu_device *smmu)
+static const struct arm_smmu_impl qcom_adreno_smmu_impl = {
+	.init_context = qcom_adreno_smmu_init_context,
+	.def_domain_type = qcom_smmu_def_domain_type,
+	.reset = qcom_smmu500_reset,
+};
+
+
+static struct arm_smmu_device *qcom_smmu_create(struct arm_smmu_device *smmu,
+		const struct arm_smmu_impl *impl)
 {
 	struct qcom_smmu *qsmmu;
 
@@ -75,8 +106,18 @@  struct arm_smmu_device *qcom_smmu_impl_init(struct arm_smmu_device *smmu)
 
 	qsmmu->smmu = *smmu;
 
-	qsmmu->smmu.impl = &qcom_smmu_impl;
+	qsmmu->smmu.impl = impl;
 	devm_kfree(smmu->dev, smmu);
 
 	return &qsmmu->smmu;
 }
+
+struct arm_smmu_device *qcom_smmu_impl_init(struct arm_smmu_device *smmu)
+{
+	return qcom_smmu_create(smmu, &qcom_smmu_impl);
+}
+
+struct arm_smmu_device *qcom_adreno_smmu_impl_init(struct arm_smmu_device *smmu)
+{
+	return qcom_smmu_create(smmu, &qcom_adreno_smmu_impl);
+}
diff --git a/drivers/iommu/arm-smmu.h b/drivers/iommu/arm-smmu.h
index d33cfe26b2f5..c417814f1d98 100644
--- a/drivers/iommu/arm-smmu.h
+++ b/drivers/iommu/arm-smmu.h
@@ -466,6 +466,7 @@  static inline void arm_smmu_writeq(struct arm_smmu_device *smmu, int page,
 
 struct arm_smmu_device *arm_smmu_impl_init(struct arm_smmu_device *smmu);
 struct arm_smmu_device *qcom_smmu_impl_init(struct arm_smmu_device *smmu);
+struct arm_smmu_device *qcom_adreno_smmu_impl_init(struct arm_smmu_device *smmu);
 
 int arm_mmu500_reset(struct arm_smmu_device *smmu);