From mboxrd@z Thu Jan 1 00:00:00 1970
Return-Path: <aburakov@ecsmtp.ir.intel.com>
Received: from mga01.intel.com (mga01.intel.com [192.55.52.88])
by dpdk.org (Postfix) with ESMTP id AF04F1BB7D
for <dev@dpdk.org>; Wed, 11 Apr 2018 14:30:57 +0200 (CEST)
X-Amp-Result: SKIPPED(no attachment in message)
X-Amp-File-Uploaded: False
Received: from fmsmga001.fm.intel.com ([10.253.24.23])
by fmsmga101.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384;
11 Apr 2018 05:30:56 -0700
X-ExtLoop1: 1
X-IronPort-AV: E=Sophos;i="5.48,436,1517904000"; d="scan'208";a="46047748"
Received: from irvmail001.ir.intel.com ([163.33.26.43])
by fmsmga001.fm.intel.com with ESMTP; 11 Apr 2018 05:30:52 -0700
Received: from sivswdev01.ir.intel.com (sivswdev01.ir.intel.com
[10.237.217.45])
by irvmail001.ir.intel.com (8.14.3/8.13.6/MailSET/Hub) with ESMTP id
w3BCUqqC012405; Wed, 11 Apr 2018 13:30:52 +0100
Received: from sivswdev01.ir.intel.com (localhost [127.0.0.1])
by sivswdev01.ir.intel.com with ESMTP id w3BCUqNT013810;
Wed, 11 Apr 2018 13:30:52 +0100
Received: (from aburakov@localhost)
by sivswdev01.ir.intel.com with LOCAL id w3BCUq2x013806;
Wed, 11 Apr 2018 13:30:52 +0100
From: Anatoly Burakov <anatoly.burakov@intel.com>
To: dev@dpdk.org
Cc: keith.wiles@intel.com, jianfeng.tan@intel.com, andras.kovacs@ericsson.com,
laszlo.vadkeri@ericsson.com, benjamin.walker@intel.com,
bruce.richardson@intel.com, thomas@monjalon.net,
konstantin.ananyev@intel.com, kuralamudhan.ramakrishnan@intel.com,
louise.m.daly@intel.com, nelio.laranjeiro@6wind.com,
yskoh@mellanox.com, pepperjo@japf.ch, jerin.jacob@caviumnetworks.com,
hemant.agrawal@nxp.com, olivier.matz@6wind.com, shreyansh.jain@nxp.com,
gowrishankar.m@linux.vnet.ibm.com
Date: Wed, 11 Apr 2018 13:30:15 +0100
Message-Id: <8d3ec9f2d40de48abee17e9f1ab1a99c0e97d8dc.1523448978.git.anatoly.burakov@intel.com>
X-Mailer: git-send-email 1.7.0.7
In-Reply-To: <cover.1523448978.git.anatoly.burakov@intel.com>
References: <cover.1523448978.git.anatoly.burakov@intel.com>
In-Reply-To: <cover.1523448978.git.anatoly.burakov@intel.com>
References: <cover.1523296700.git.anatoly.burakov@intel.com>
<cover.1523448978.git.anatoly.burakov@intel.com>
Subject: [dpdk-dev] [PATCH v6 40/70] eal: add virt2memseg function
X-BeenThere: dev@dpdk.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: DPDK patches and discussions <dev.dpdk.org>
List-Unsubscribe: <https://dpdk.org/ml/options/dev>,
<mailto:dev-request@dpdk.org?subject=unsubscribe>
List-Archive: <http://dpdk.org/ml/archives/dev/>
List-Post: <mailto:dev@dpdk.org>
List-Help: <mailto:dev-request@dpdk.org?subject=help>
List-Subscribe: <https://dpdk.org/ml/listinfo/dev>,
<mailto:dev-request@dpdk.org?subject=subscribe>
X-List-Received-Date: Wed, 11 Apr 2018 12:30:58 -0000
This can be used as a virt2iova function that only looks up
memory that is owned by DPDK (as opposed to doing pagemap walks).
Using this will result in less dependency on internals of mem API.
Signed-off-by: Anatoly Burakov <anatoly.burakov@intel.com>
Tested-by: Santosh Shukla <santosh.shukla@caviumnetworks.com>
Tested-by: Hemant Agrawal <hemant.agrawal@nxp.com>
Tested-by: Gowrishankar Muthukrishnan <gowrishankar.m@linux.vnet.ibm.com>
---
lib/librte_eal/common/eal_common_memory.c | 37 ++++++++++++++++++++++++++++++
lib/librte_eal/common/include/rte_memory.h | 11 +++++++++
lib/librte_eal/rte_eal_version.map | 1 +
3 files changed, 49 insertions(+)
diff --git a/lib/librte_eal/common/eal_common_memory.c b/lib/librte_eal/common/eal_common_memory.c
index ea3c5a7..fd78d2f 100644
--- a/lib/librte_eal/common/eal_common_memory.c
+++ b/lib/librte_eal/common/eal_common_memory.c
@@ -161,6 +161,43 @@ rte_mem_iova2virt(rte_iova_t iova)
return vi.virt;
}
+struct virtms {
+ const void *virt;
+ struct rte_memseg *ms;
+};
+static int
+find_memseg(const struct rte_memseg *ms, void *arg)
+{
+ struct virtms *vm = arg;
+
+ if (arg >= ms->addr && arg < RTE_PTR_ADD(ms->addr, ms->len)) {
+ struct rte_memseg *memseg, *found_ms;
+ int idx;
+
+ memseg = rte_eal_get_configuration()->mem_config->memseg;
+ idx = ms - memseg;
+ found_ms = &memseg[idx];
+
+ vm->ms = found_ms;
+ return 1;
+ }
+ return 0;
+}
+
+__rte_experimental struct rte_memseg *
+rte_mem_virt2memseg(const void *addr)
+{
+ struct virtms vm;
+
+ memset(&vm, 0, sizeof(vm));
+
+ vm.virt = addr;
+
+ rte_memseg_walk(find_memseg, &vm);
+
+ return vm.ms;
+}
+
static int
physmem_size(const struct rte_memseg *ms, void *arg)
{
diff --git a/lib/librte_eal/common/include/rte_memory.h b/lib/librte_eal/common/include/rte_memory.h
index 5c60b91..b3d7e61 100644
--- a/lib/librte_eal/common/include/rte_memory.h
+++ b/lib/librte_eal/common/include/rte_memory.h
@@ -143,6 +143,17 @@ __rte_experimental void *
rte_mem_iova2virt(rte_iova_t iova);
/**
+ * Get memseg to which a particular virtual address belongs.
+ *
+ * @param virt
+ * The virtual address.
+ * @return
+ * Memseg pointer on success, or NULL on error.
+ */
+__rte_experimental struct rte_memseg *
+rte_mem_virt2memseg(const void *virt);
+
+/**
* Memseg walk function prototype.
*
* Returning 0 will continue walk
diff --git a/lib/librte_eal/rte_eal_version.map b/lib/librte_eal/rte_eal_version.map
index dccfc35..79433b7 100644
--- a/lib/librte_eal/rte_eal_version.map
+++ b/lib/librte_eal/rte_eal_version.map
@@ -224,6 +224,7 @@ EXPERIMENTAL {
rte_log_register_type_and_pick_level;
rte_malloc_dump_heaps;
rte_mem_iova2virt;
+ rte_mem_virt2memseg;
rte_memseg_contig_walk;
rte_memseg_walk;
rte_mp_action_register;
--
2.7.4