From: Leonardo Bras <leobras.c@gmail.com>
To: Michael Ellerman <mpe@ellerman.id.au>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>, Joel Stanley <joel@jms.id.au>,
Christophe Leroy <christophe.leroy@c-s.fr>,
Leonardo Bras <leobras.c@gmail.com>,
Alexey Kardashevskiy <aik@ozlabs.ru>,
Nicolin Chen <nicoleotsuka@gmail.com>,
Niklas Schnelle <schnelle@linux.ibm.com>
Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org
Subject: [PATCH v4 03/11] powerpc/pseries/iommu: Add iommu_pseries_alloc_table() helper
Date: Fri, 30 Apr 2021 13:31:38 -0300 [thread overview]
Message-ID: <20210430163145.146984-4-leobras.c@gmail.com> (raw)
In-Reply-To: <20210430163145.146984-1-leobras.c@gmail.com>
Creates a helper to allow allocating a new iommu_table without the need
to reallocate the iommu_group.
This will be helpful for replacing the iommu_table for the new DMA window,
after we remove the old one with iommu_tce_table_put().
Signed-off-by: Leonardo Bras <leobras.c@gmail.com>
Reviewed-by: Alexey Kardashevskiy <aik@ozlabs.ru>
---
arch/powerpc/platforms/pseries/iommu.c | 25 ++++++++++++++-----------
1 file changed, 14 insertions(+), 11 deletions(-)
diff --git a/arch/powerpc/platforms/pseries/iommu.c b/arch/powerpc/platforms/pseries/iommu.c
index 796ab356341c..d02359ca1f9f 100644
--- a/arch/powerpc/platforms/pseries/iommu.c
+++ b/arch/powerpc/platforms/pseries/iommu.c
@@ -53,28 +53,31 @@ enum {
DDW_EXT_QUERY_OUT_SIZE = 2
};
-static struct iommu_table_group *iommu_pseries_alloc_group(int node)
+static struct iommu_table *iommu_pseries_alloc_table(int node)
{
- struct iommu_table_group *table_group;
struct iommu_table *tbl;
- table_group = kzalloc_node(sizeof(struct iommu_table_group), GFP_KERNEL,
- node);
- if (!table_group)
- return NULL;
-
tbl = kzalloc_node(sizeof(struct iommu_table), GFP_KERNEL, node);
if (!tbl)
- goto free_group;
+ return NULL;
INIT_LIST_HEAD_RCU(&tbl->it_group_list);
kref_init(&tbl->it_kref);
+ return tbl;
+}
- table_group->tables[0] = tbl;
+static struct iommu_table_group *iommu_pseries_alloc_group(int node)
+{
+ struct iommu_table_group *table_group;
+
+ table_group = kzalloc_node(sizeof(*table_group), GFP_KERNEL, node);
+ if (!table_group)
+ return NULL;
- return table_group;
+ table_group->tables[0] = iommu_pseries_alloc_table(node);
+ if (table_group->tables[0])
+ return table_group;
-free_group:
kfree(table_group);
return NULL;
}
--
2.30.2
next prev parent reply other threads:[~2021-04-30 16:33 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-30 16:31 [PATCH v4 00/11] DDW + Indirect Mapping Leonardo Bras
2021-04-30 16:31 ` [PATCH v4 01/11] powerpc/pseries/iommu: Replace hard-coded page shift Leonardo Bras
2021-04-30 16:31 ` [PATCH v4 02/11] powerpc/kernel/iommu: Add new iommu_table_in_use() helper Leonardo Bras
2021-05-10 7:34 ` Alexey Kardashevskiy
2021-04-30 16:31 ` Leonardo Bras [this message]
2021-04-30 16:31 ` [PATCH v4 04/11] powerpc/pseries/iommu: Add ddw_list_new_entry() helper Leonardo Bras
2021-04-30 16:31 ` [PATCH v4 05/11] powerpc/pseries/iommu: Allow DDW windows starting at 0x00 Leonardo Bras
2021-04-30 16:31 ` [PATCH v4 06/11] powerpc/pseries/iommu: Add ddw_property_create() and refactor enable_ddw() Leonardo Bras
2021-05-10 7:34 ` Alexey Kardashevskiy
2021-04-30 16:31 ` [PATCH v4 07/11] powerpc/pseries/iommu: Reorganize iommu_table_setparms*() with new helper Leonardo Bras
2021-05-10 7:34 ` Alexey Kardashevskiy
2021-06-18 22:26 ` Leonardo Brás
2021-07-13 4:47 ` Leonardo Brás
2021-07-14 8:32 ` Alexey Kardashevskiy
2021-07-14 19:02 ` Leonardo Brás
2021-04-30 16:31 ` [PATCH v4 08/11] powerpc/pseries/iommu: Update remove_dma_window() to accept property name Leonardo Bras
2021-05-11 7:57 ` Alexey Kardashevskiy
2021-04-30 16:31 ` [PATCH v4 09/11] powerpc/pseries/iommu: Find existing DDW with given " Leonardo Bras
2021-05-11 7:57 ` Alexey Kardashevskiy
2021-04-30 16:31 ` [PATCH v4 10/11] powerpc/pseries/iommu: Make use of DDW for indirect mapping Leonardo Bras
2021-05-11 7:57 ` Alexey Kardashevskiy
2021-07-13 4:36 ` Leonardo Brás
2021-07-14 8:38 ` Alexey Kardashevskiy
2021-07-14 19:25 ` Leonardo Brás
2021-04-30 16:31 ` [PATCH v4 11/11] powerpc/pseries/iommu: Rename "direct window" to "dma window" Leonardo Bras
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