From: Nithin Dabilpuram <ndabilpuram@marvell.com>
To: "Burakov, Anatoly" <anatoly.burakov@intel.com>
Cc: <jerinj@marvell.com>, <dev@dpdk.org>
Subject: Re: [dpdk-dev] [EXT] Re: [PATCH 1/2] test: add test case to validate VFIO DMA map/unmap
Date: Thu, 15 Oct 2020 15:24:00 +0530 [thread overview]
Message-ID: <20201015095400.GB32207@outlook.office365.com> (raw)
In-Reply-To: <c13b4ac0-d8b4-edba-e713-98c4be037c77@intel.com>
On Wed, Oct 14, 2020 at 03:39:36PM +0100, Burakov, Anatoly wrote:
> External Email
>
> ----------------------------------------------------------------------
> On 12-Oct-20 9:11 AM, Nithin Dabilpuram wrote:
> > Add test case in test_memory to test VFIO DMA map/unmap.
> >
> > Signed-off-by: Nithin Dabilpuram <ndabilpuram@marvell.com>
> > ---
> > app/test/test_memory.c | 79 ++++++++++++++++++++++++++++++++++++++++++++++++++
> > 1 file changed, 79 insertions(+)
> >
> > diff --git a/app/test/test_memory.c b/app/test/test_memory.c
> > index 7d5ae99..1c56455 100644
> > --- a/app/test/test_memory.c
> > +++ b/app/test/test_memory.c
> > @@ -4,11 +4,16 @@
> > #include <stdio.h>
> > #include <stdint.h>
> > +#include <string.h>
> > +#include <sys/mman.h>
> > +#include <unistd.h>
> > #include <rte_eal.h>
> > +#include <rte_errno.h>
> > #include <rte_memory.h>
> > #include <rte_common.h>
> > #include <rte_memzone.h>
> > +#include <rte_vfio.h>
> > #include "test.h"
> > @@ -70,6 +75,71 @@ check_seg_fds(const struct rte_memseg_list *msl, const struct rte_memseg *ms,
> > }
> > static int
> > +test_memory_vfio_dma_map(void)
> > +{
> > + uint64_t sz = 2 * sysconf(_SC_PAGESIZE), sz1, sz2;
>
> i think we now have a function for that, rte_page_size() ?
>
> Also, i would prefer
>
> uint64_t sz1, sz2, sz = 2 * rte_page_size();
>
> Easier to parse IMO.
Ack, will use rte_mem_page_size().
>
> > + uint64_t unmap1, unmap2;
> > + uint8_t *mem;
> > + int ret;
> > +
> > + /* Check if vfio is enabled in both kernel and eal */
> > + ret = rte_vfio_is_enabled("vfio");
> > + if (!ret)
> > + return 1;
>
> No need, rte_vfio_container_dma_map() should set errno to ENODEV if vfio is
> not enabled.
Ack.
>
> > +
> > + /* Allocate twice size of page */
> > + mem = mmap(NULL, sz, PROT_READ | PROT_WRITE,
> > + MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
> > + if (mem == MAP_FAILED) {
> > + printf("Failed to allocate memory for external heap\n");
> > + return -1;
> > + }
> > +
> > + /* Force page allocation */
> > + memset(mem, 0, sz);
> > +
> > + /* map the whole region */
> > + ret = rte_vfio_container_dma_map(RTE_VFIO_DEFAULT_CONTAINER_FD,
> > + (uint64_t)mem, (rte_iova_t)mem, sz);
>
> should be (uintptr_t) perhaps?
>
> Also, this can return -1 with rte_errno == ENOTSUP, i think this happens if
> there are no devices attached (or if there's no VFIO support, like it would
> be on FreeBSD or Windows).
Ok. Will return 1 if NOTSUP.
>
> > + if (ret) {
> > + printf("Failed to dma map whole region, ret=%d\n", ret);
> > + goto fail;
> > + }
> > +
> > + unmap1 = (uint64_t)mem + (sz / 2);
> > + sz1 = sz / 2;
> > + unmap2 = (uint64_t)mem;
> > + sz2 = sz / 2;
> > + /* unmap the partial region */
> > + ret = rte_vfio_container_dma_unmap(RTE_VFIO_DEFAULT_CONTAINER_FD,
> > + unmap1, (rte_iova_t)unmap1, sz1);
> > + if (ret) {
> > + if (rte_errno == ENOTSUP) {
> > + printf("Partial dma unmap not supported\n");
> > + unmap2 = (uint64_t)mem;
> > + sz2 = sz;
> > + } else {
> > + printf("Failed to unmap send half region, ret=%d(%d)\n",
>
> I think "send half" is a typo? Also, here and in other places, i would
> prefer a rte_strerror() instead of raw rte_errno number.
Ack.
>
> > + ret, rte_errno);
> > + goto fail;
> > + }
> > + }
> > +
> > + /* unmap the remaining region */
> > + ret = rte_vfio_container_dma_unmap(RTE_VFIO_DEFAULT_CONTAINER_FD,
> > + unmap2, (rte_iova_t)unmap2, sz2);
> > + if (ret) {
> > + printf("Failed to unmap remaining region, ret=%d(%d)\n", ret,
> > + rte_errno);
> > + goto fail;
> > + }
> > +
> > +fail:
> > + munmap(mem, sz);
> > + return ret;
> > +}
> > +
> > +static int
> > test_memory(void)
> > {
> > uint64_t s;
> > @@ -101,6 +171,15 @@ test_memory(void)
> > return -1;
> > }
> > + /* test for vfio dma map/unmap */
> > + ret = test_memory_vfio_dma_map();
> > + if (ret == 1) {
> > + printf("VFIO dma map/unmap unsupported\n");
> > + } else if (ret < 0) {
> > + printf("Error vfio dma map/unmap, ret=%d\n", ret);
> > + return -1;
> > + }
> > +
>
> This looks odd in this autotest. Perhaps create a new autotest for VFIO?
Ack, will add test_vfio.c
>
> > return 0;
> > }
> >
>
>
> --
> Thanks,
> Anatoly
next prev parent reply other threads:[~2020-10-15 9:54 UTC|newest]
Thread overview: 81+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-12 8:11 [dpdk-dev] [PATCH 0/2] fix issue with partial DMA unmap Nithin Dabilpuram
2020-10-12 8:11 ` [dpdk-dev] [PATCH 1/2] test: add test case to validate VFIO DMA map/unmap Nithin Dabilpuram
2020-10-14 14:39 ` Burakov, Anatoly
2020-10-15 9:54 ` Nithin Dabilpuram [this message]
2020-10-12 8:11 ` [dpdk-dev] [PATCH 2/2] vfio: fix partial DMA unmapping for VFIO type1 Nithin Dabilpuram
2020-10-14 15:07 ` Burakov, Anatoly
2020-10-15 6:09 ` [dpdk-dev] [EXT] " Nithin Dabilpuram
2020-10-15 10:00 ` Burakov, Anatoly
2020-10-15 11:38 ` Nithin Dabilpuram
2020-10-15 11:50 ` Nithin Dabilpuram
2020-10-15 11:57 ` Nithin Dabilpuram
2020-10-15 15:10 ` Burakov, Anatoly
2020-10-16 7:10 ` Nithin Dabilpuram
2020-10-17 16:14 ` Burakov, Anatoly
2020-10-19 9:43 ` Nithin Dabilpuram
2020-10-22 12:13 ` Nithin Dabilpuram
2020-10-28 13:04 ` Burakov, Anatoly
2020-10-28 14:17 ` Nithin Dabilpuram
2020-10-28 16:07 ` Burakov, Anatoly
2020-10-28 16:31 ` Nithin Dabilpuram
2020-11-05 9:04 ` [dpdk-dev] [PATCH v2 0/3] fix issue with partial DMA unmap Nithin Dabilpuram
2020-11-05 9:04 ` [dpdk-dev] [PATCH v2 1/3] vfio: revert changes for map contiguous areas in one go Nithin Dabilpuram
2020-11-05 9:04 ` [dpdk-dev] [PATCH v2 2/3] vfio: fix DMA mapping granularity for type1 iova as va Nithin Dabilpuram
2020-11-10 14:04 ` Burakov, Anatoly
2020-11-10 14:22 ` Burakov, Anatoly
2020-11-10 14:17 ` Burakov, Anatoly
2020-11-11 5:08 ` Nithin Dabilpuram
2020-11-11 10:00 ` Burakov, Anatoly
2020-11-05 9:04 ` [dpdk-dev] [PATCH v2 3/3] test: add test case to validate VFIO DMA map/unmap Nithin Dabilpuram
2020-12-01 19:32 ` [dpdk-dev] [PATCH v3 0/4] fix issue with partial DMA unmap Nithin Dabilpuram
2020-12-01 19:32 ` [dpdk-dev] [PATCH v3 1/4] vfio: revert changes for map contiguous areas in one go Nithin Dabilpuram
2020-12-01 19:33 ` [dpdk-dev] [PATCH v3 2/4] vfio: fix DMA mapping granularity for type1 IOVA as VA Nithin Dabilpuram
2020-12-01 19:33 ` [dpdk-dev] [PATCH v3 3/4] test: add test case to validate VFIO DMA map/unmap Nithin Dabilpuram
2020-12-01 19:33 ` [dpdk-dev] [PATCH v3 4/4] test: change external memory test to use system page sz Nithin Dabilpuram
2020-12-01 23:23 ` David Christensen
2020-12-02 5:40 ` Nithin Dabilpuram
2020-12-02 5:46 ` [dpdk-dev] [PATCH v4 0/4] fix issue with partial DMA unmap Nithin Dabilpuram
2020-12-02 5:46 ` [dpdk-dev] [PATCH v4 1/4] vfio: revert changes for map contiguous areas in one go Nithin Dabilpuram
2020-12-02 18:36 ` David Christensen
2020-12-02 5:46 ` [dpdk-dev] [PATCH v4 2/4] vfio: fix DMA mapping granularity for type1 IOVA as VA Nithin Dabilpuram
2020-12-02 18:38 ` David Christensen
2020-12-02 5:46 ` [dpdk-dev] [PATCH v4 3/4] test: add test case to validate VFIO DMA map/unmap Nithin Dabilpuram
2020-12-02 19:23 ` David Christensen
2020-12-03 7:14 ` Nithin Dabilpuram
2020-12-14 8:24 ` Nithin Dabilpuram
2020-12-02 5:46 ` [dpdk-dev] [PATCH v4 4/4] test: change external memory test to use system page sz Nithin Dabilpuram
2020-12-14 8:19 ` [dpdk-dev] [PATCH v5 0/4] fix issue with partial DMA unmap Nithin Dabilpuram
2020-12-14 8:19 ` [dpdk-dev] [PATCH v5 1/4] vfio: revert changes for map contiguous areas in one go Nithin Dabilpuram
2020-12-14 8:19 ` [dpdk-dev] [PATCH v5 2/4] vfio: fix DMA mapping granularity for type1 IOVA as VA Nithin Dabilpuram
2020-12-14 8:19 ` [dpdk-dev] [PATCH v5 3/4] test: add test case to validate VFIO DMA map/unmap Nithin Dabilpuram
2020-12-14 8:19 ` [dpdk-dev] [PATCH v5 4/4] test: change external memory test to use system page sz Nithin Dabilpuram
2020-12-17 19:06 ` [dpdk-dev] [PATCH v6 0/4] fix issue with partial DMA unmap Nithin Dabilpuram
2020-12-17 19:06 ` [dpdk-dev] [PATCH v6 1/4] vfio: revert changes for map contiguous areas in one go Nithin Dabilpuram
2020-12-17 19:06 ` [dpdk-dev] [PATCH v6 2/4] vfio: fix DMA mapping granularity for type1 IOVA as VA Nithin Dabilpuram
2020-12-17 19:06 ` [dpdk-dev] [PATCH v6 3/4] test: add test case to validate VFIO DMA map/unmap Nithin Dabilpuram
2020-12-17 19:10 ` Nithin Dabilpuram
2021-01-05 19:33 ` David Christensen
2021-01-06 8:40 ` Nithin Dabilpuram
2021-01-06 21:20 ` David Christensen
2020-12-17 19:06 ` [dpdk-dev] [PATCH v6 4/4] test: change external memory test to use system page sz Nithin Dabilpuram
2020-12-23 5:13 ` [dpdk-dev] [PATCH v6 0/4] fix issue with partial DMA unmap Nithin Dabilpuram
2021-01-04 22:29 ` David Christensen
2021-01-12 17:39 ` [dpdk-dev] [PATCH v7 0/3] " Nithin Dabilpuram
2021-01-12 17:39 ` [dpdk-dev] [PATCH v7 1/3] vfio: revert changes for map contiguous areas in one go Nithin Dabilpuram
2021-01-12 17:39 ` [dpdk-dev] [PATCH v7 2/3] vfio: fix DMA mapping granularity for type1 IOVA as VA Nithin Dabilpuram
2021-01-12 17:39 ` [dpdk-dev] [PATCH v7 3/3] test: change external memory test to use system page sz Nithin Dabilpuram
2021-01-14 16:30 ` David Marchand
2021-01-15 6:57 ` Nithin Dabilpuram
2021-01-15 7:32 ` [dpdk-dev] [PATCH v8 0/3] fix issue with partial DMA unmap Nithin Dabilpuram
2021-01-15 7:32 ` [dpdk-dev] [PATCH v8 1/3] vfio: revert changes for map contiguous areas in one go Nithin Dabilpuram
2021-03-05 7:50 ` David Marchand
2021-03-05 13:54 ` Burakov, Anatoly
2021-03-05 15:50 ` Nithin Dabilpuram
2021-04-01 11:27 ` Burakov, Anatoly
2021-01-15 7:32 ` [dpdk-dev] [PATCH v8 2/3] vfio: fix DMA mapping granularity for type1 IOVA as VA Nithin Dabilpuram
2021-01-15 7:32 ` [dpdk-dev] [PATCH v8 3/3] test: change external memory test to use system page sz Nithin Dabilpuram
2021-02-11 11:21 ` Burakov, Anatoly
2021-02-16 13:14 ` [dpdk-dev] [PATCH v8 0/3] fix issue with partial DMA unmap Burakov, Anatoly
2021-02-22 9:41 ` Nithin Dabilpuram
2021-02-22 10:06 ` David Marchand
2021-03-01 12:13 ` David Marchand
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