From: Lu Baolu <baolu.lu@linux.intel.com>
To: Joerg Roedel <joro@8bytes.org>, Jason Gunthorpe <jgg@nvidia.com>,
Christoph Hellwig <hch@infradead.org>,
Kevin Tian <kevin.tian@intel.com>,
Ashok Raj <ashok.raj@intel.com>, Will Deacon <will@kernel.org>,
Robin Murphy <robin.murphy@arm.com>,
Jean-Philippe Brucker <jean-philippe@linaro.com>,
Dave Jiang <dave.jiang@intel.com>, Vinod Koul <vkoul@kernel.org>
Cc: Eric Auger <eric.auger@redhat.com>, Liu Yi L <yi.l.liu@intel.com>,
Jacob jun Pan <jacob.jun.pan@intel.com>,
Zhangfei Gao <zhangfei.gao@linaro.org>,
Zhu Tony <tony.zhu@intel.com>,
iommu@lists.linux.dev, linux-kernel@vger.kernel.org,
Lu Baolu <baolu.lu@linux.intel.com>
Subject: [PATCH v10 02/12] iommu: Add max_pasids field in struct dev_iommu
Date: Tue, 5 Jul 2022 13:07:00 +0800 [thread overview]
Message-ID: <20220705050710.2887204-3-baolu.lu@linux.intel.com> (raw)
In-Reply-To: <20220705050710.2887204-1-baolu.lu@linux.intel.com>
Use this field to save the number of PASIDs that a device is able to
consume. It is a generic attribute of a device and lifting it into the
per-device dev_iommu struct could help to avoid the boilerplate code
in various IOMMU drivers.
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Tested-by: Zhangfei Gao <zhangfei.gao@linaro.org>
Tested-by: Tony Zhu <tony.zhu@intel.com>
---
include/linux/iommu.h | 2 ++
drivers/iommu/iommu.c | 20 ++++++++++++++++++++
2 files changed, 22 insertions(+)
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 03fbb1b71536..418a1914a041 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -364,6 +364,7 @@ struct iommu_fault_param {
* @fwspec: IOMMU fwspec data
* @iommu_dev: IOMMU device this device is linked to
* @priv: IOMMU Driver private data
+ * @max_pasids: number of PASIDs this device can consume
*
* TODO: migrate other per device data pointers under iommu_dev_data, e.g.
* struct iommu_group *iommu_group;
@@ -375,6 +376,7 @@ struct dev_iommu {
struct iommu_fwspec *fwspec;
struct iommu_device *iommu_dev;
void *priv;
+ u32 max_pasids;
};
int iommu_device_register(struct iommu_device *iommu,
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index cdc86c39954e..0cb0750f61e8 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -20,6 +20,7 @@
#include <linux/idr.h>
#include <linux/err.h>
#include <linux/pci.h>
+#include <linux/pci-ats.h>
#include <linux/bitops.h>
#include <linux/property.h>
#include <linux/fsl/mc.h>
@@ -218,6 +219,24 @@ static void dev_iommu_free(struct device *dev)
kfree(param);
}
+static u32 dev_iommu_get_max_pasids(struct device *dev)
+{
+ u32 max_pasids = 0, bits = 0;
+ int ret;
+
+ if (dev_is_pci(dev)) {
+ ret = pci_max_pasids(to_pci_dev(dev));
+ if (ret > 0)
+ max_pasids = ret;
+ } else {
+ ret = device_property_read_u32(dev, "pasid-num-bits", &bits);
+ if (!ret)
+ max_pasids = 1UL << bits;
+ }
+
+ return min_t(u32, max_pasids, dev->iommu->iommu_dev->max_pasids);
+}
+
static int __iommu_probe_device(struct device *dev, struct list_head *group_list)
{
const struct iommu_ops *ops = dev->bus->iommu_ops;
@@ -243,6 +262,7 @@ static int __iommu_probe_device(struct device *dev, struct list_head *group_list
}
dev->iommu->iommu_dev = iommu_dev;
+ dev->iommu->max_pasids = dev_iommu_get_max_pasids(dev);
group = iommu_group_get_for_dev(dev);
if (IS_ERR(group)) {
--
2.25.1
next prev parent reply other threads:[~2022-07-05 5:11 UTC|newest]
Thread overview: 90+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-05 5:06 [PATCH v10 00/12] iommu: SVA and IOPF refactoring Lu Baolu
2022-07-05 5:06 ` [PATCH v10 01/12] iommu: Add max_pasids field in struct iommu_device Lu Baolu
2022-07-23 13:57 ` Jason Gunthorpe
2022-07-31 11:54 ` Yi Liu
2022-07-31 13:33 ` Baolu Lu
2022-07-05 5:07 ` Lu Baolu [this message]
2022-07-23 14:02 ` [PATCH v10 02/12] iommu: Add max_pasids field in struct dev_iommu Jason Gunthorpe
2022-07-31 11:55 ` Yi Liu
2022-07-05 5:07 ` [PATCH v10 03/12] iommu: Remove SVM_FLAG_SUPERVISOR_MODE support Lu Baolu
2022-07-31 12:01 ` Yi Liu
2022-07-31 13:39 ` Baolu Lu
2022-07-05 5:07 ` [PATCH v10 04/12] iommu: Add attach/detach_dev_pasid iommu interface Lu Baolu
2022-07-07 1:51 ` Tian, Kevin
2022-07-23 14:11 ` Jason Gunthorpe
2022-07-24 7:03 ` Baolu Lu
2022-07-25 14:40 ` Jason Gunthorpe
2022-07-26 6:23 ` Baolu Lu
2022-07-26 13:57 ` Jason Gunthorpe
2022-07-27 3:20 ` Tian, Kevin
2022-07-27 11:53 ` Jason Gunthorpe
2022-07-28 3:06 ` Tian, Kevin
2022-07-28 11:59 ` Jason Gunthorpe
2022-07-29 2:49 ` Baolu Lu
2022-07-29 2:56 ` Tian, Kevin
2022-07-29 3:20 ` Baolu Lu
2022-07-29 4:22 ` Tian, Kevin
2022-07-30 6:17 ` Baolu Lu
2022-07-29 2:51 ` Tian, Kevin
2022-07-29 12:22 ` Jason Gunthorpe
2022-07-30 6:23 ` Baolu Lu
2022-07-28 2:44 ` Baolu Lu
2022-07-28 6:27 ` Baolu Lu
2022-08-02 2:19 ` Baolu Lu
2022-08-02 12:37 ` Jason Gunthorpe
2022-08-03 13:07 ` Baolu Lu
2022-08-03 19:03 ` Jason Gunthorpe
2022-08-04 2:03 ` Tian, Kevin
2022-08-04 2:42 ` Baolu Lu
2022-07-24 7:23 ` Baolu Lu
2022-07-24 8:39 ` Baolu Lu
2022-07-24 9:13 ` Baolu Lu
2022-07-25 7:46 ` Tian, Kevin
2022-07-25 10:11 ` Baolu Lu
2022-07-31 12:10 ` Yi Liu
2022-07-05 5:07 ` [PATCH v10 05/12] iommu: Add IOMMU SVA domain support Lu Baolu
2022-07-07 1:52 ` Tian, Kevin
2022-07-07 3:01 ` Baolu Lu
2022-07-23 14:15 ` Jason Gunthorpe
2022-07-31 12:19 ` Yi Liu
2022-07-05 5:07 ` [PATCH v10 06/12] iommu/vt-d: Add " Lu Baolu
2022-07-23 14:16 ` Jason Gunthorpe
2022-07-31 12:20 ` Yi Liu
2022-07-05 5:07 ` [PATCH v10 07/12] arm-smmu-v3/sva: " Lu Baolu
2022-07-23 14:20 ` Jason Gunthorpe
2022-07-24 11:58 ` Baolu Lu
2022-07-05 5:07 ` [PATCH v10 08/12] iommu/sva: Refactoring iommu_sva_bind/unbind_device() Lu Baolu
2022-07-05 17:43 ` Jean-Philippe Brucker
2022-07-07 1:56 ` Tian, Kevin
2022-07-07 3:02 ` Baolu Lu
2022-07-23 14:26 ` Jason Gunthorpe
2022-07-24 13:48 ` Baolu Lu
2022-07-25 7:39 ` Jean-Philippe Brucker
2022-07-25 8:02 ` Tian, Kevin
2022-07-25 8:47 ` Jean-Philippe Brucker
2022-07-25 9:33 ` Baolu Lu
2022-07-25 9:52 ` Jean-Philippe Brucker
2022-07-25 14:46 ` Jason Gunthorpe
2022-07-25 7:50 ` Tian, Kevin
2022-07-25 10:22 ` Baolu Lu
2022-07-25 14:47 ` Jason Gunthorpe
2022-07-26 8:47 ` Baolu Lu
2022-07-31 12:36 ` Yi Liu
2022-07-31 13:45 ` Baolu Lu
2022-07-31 12:55 ` Yi Liu
2022-07-31 13:51 ` Baolu Lu
2022-07-05 5:07 ` [PATCH v10 09/12] iommu: Remove SVA related callbacks from iommu ops Lu Baolu
2022-07-23 14:27 ` Jason Gunthorpe
2022-07-31 12:38 ` Yi Liu
2022-07-05 5:07 ` [PATCH v10 10/12] iommu: Prepare IOMMU domain for IOPF Lu Baolu
2022-07-07 1:58 ` Tian, Kevin
2022-07-23 14:33 ` Jason Gunthorpe
2022-07-24 14:04 ` Baolu Lu
2022-07-25 14:49 ` Jason Gunthorpe
2022-07-31 12:50 ` Yi Liu
2022-07-31 13:47 ` Baolu Lu
2022-07-05 5:07 ` [PATCH v10 11/12] iommu: Per-domain I/O page fault handling Lu Baolu
2022-07-07 2:06 ` Tian, Kevin
2022-07-23 14:34 ` Jason Gunthorpe
2022-07-05 5:07 ` [PATCH v10 12/12] iommu: Rename iommu-sva-lib.{c,h} Lu Baolu
2022-07-23 14:34 ` Jason Gunthorpe
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