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From: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
To: <linux-arm-kernel@lists.infradead.org>,
	<linux-acpi@vger.kernel.org>, <iommu@lists.linux-foundation.org>,
	<devel@acpica.org>
Cc: <linuxarm@huawei.com>, <lorenzo.pieralisi@arm.com>,
	<joro@8bytes.org>, <robin.murphy@arm.com>,
	<wanghuiqiang@huawei.com>, <guohanjun@huawei.com>,
	<jonathan.cameron@huawei.com>
Subject: [RFC PATCH 4/4] iommu/dma: Reserve any RMR regions associated with a dev
Date: Tue, 27 Oct 2020 11:26:46 +0000
Message-ID: <20201027112646.44680-5-shameerali.kolothum.thodi@huawei.com> (raw)
In-Reply-To: <20201027112646.44680-1-shameerali.kolothum.thodi@huawei.com>

Added support to get RMR regions associated with a dev
reserved so that there is a unity mapping for them in
SMMU.

Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
---
 drivers/iommu/dma-iommu.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
index 0cbcd3fc3e7e..31eec16f2af8 100644
--- a/drivers/iommu/dma-iommu.c
+++ b/drivers/iommu/dma-iommu.c
@@ -153,15 +153,19 @@ EXPORT_SYMBOL(iommu_put_dma_cookie);
  * @list: Reserved region list from iommu_get_resv_regions()
  *
  * IOMMU drivers can use this to implement their .get_resv_regions callback
- * for general non-IOMMU-specific reservations. Currently, this covers GICv3
- * ITS region reservation on ACPI based ARM platforms that may require HW MSI
- * reservation.
+ * for general non-IOMMU-specific reservations. Currently this covers,
+ *  - GICv3 ITS region reservation on ACPI based ARM platforms that may
+ *    require HW MSI reservation.
+ *  - ACPI IORT RMR memory range reservations that require a unity mapping
+ *    in the SMMU for a given endpoint device.
  */
 void iommu_dma_get_resv_regions(struct device *dev, struct list_head *list)
 {
 
-	if (!is_of_node(dev_iommu_fwspec_get(dev)->iommu_fwnode))
+	if (!is_of_node(dev_iommu_fwspec_get(dev)->iommu_fwnode)) {
 		iort_iommu_msi_get_resv_regions(dev, list);
+		iort_dev_rmr_get_resv_regions(dev, list);
+	}
 
 }
 EXPORT_SYMBOL(iommu_dma_get_resv_regions);
-- 
2.17.1


  parent reply index

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-27 11:26 [RFC PATCH 0/4] ACPI/IORT: Support for IORT RMR node Shameer Kolothum
2020-10-27 11:26 ` [RFC PATCH 1/4] ACPICA: IORT: Update for revision E Shameer Kolothum
     [not found]   ` <BYAPR11MB3256AFF743B4FCC400F4181C87160@BYAPR11MB3256.namprd11.prod.outlook.com>
     [not found]     ` <610c14ef56d64fe087ca52aede07d811@huawei.com>
     [not found]       ` <MWHPR11MB1599988D7C857E3AFFA4A48AF0170@MWHPR11MB1599.namprd11.prod.outlook.com>
2020-10-28 18:40         ` [Devel] " Shameerali Kolothum Thodi
2020-10-27 11:26 ` [RFC PATCH 2/4] ACPI/IORT: Add support for RMR node parsing Shameer Kolothum
2020-10-28 18:43   ` [Devel] " David E. Box
2020-11-09 12:29     ` [Devel] " Sami Mujawar
2020-11-19 12:07       ` Shameerali Kolothum Thodi
2020-10-27 11:26 ` [RFC PATCH 3/4] ACPI/IORT: Add RMR memory regions reservation helper Shameer Kolothum
2020-11-05 18:03   ` Robin Murphy
2020-11-06  8:30     ` Shameerali Kolothum Thodi
2020-11-06 13:06       ` Robin Murphy
2020-11-06 16:00         ` Shameerali Kolothum Thodi
2020-10-27 11:26 ` Shameer Kolothum [this message]
2020-10-28 16:43 ` [RFC PATCH 0/4] ACPI/IORT: Support for IORT RMR node Steven Price
2020-10-28 18:24   ` Shameerali Kolothum Thodi
2020-11-06 15:22     ` Steven Price
2020-11-06 16:17       ` Shameerali Kolothum Thodi
2020-11-06 16:26         ` Steven Price
2020-11-06 17:09           ` Robin Murphy

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