From: Alex Sierra <alex.sierra@amd.com>
To: akpm@linux-foundation.org, Felix.Kuehling@amd.com,
linux-mm@kvack.org, rcampbell@nvidia.com,
linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org
Cc: amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org,
hch@lst.de, jgg@nvidia.com, jglisse@redhat.com
Subject: [PATCH v2 09/12] lib: test_hmm add module param for zone device type
Date: Mon, 13 Sep 2021 11:16:01 -0500 [thread overview]
Message-ID: <20210913161604.31981-10-alex.sierra@amd.com> (raw)
In-Reply-To: <20210913161604.31981-1-alex.sierra@amd.com>
In order to configure device public in test_hmm, two module parameters
should be passed, which correspond to the SP start address of each
device (2) spm_addr_dev0 & spm_addr_dev1. If no parameters are passed,
private device type is configured.
Signed-off-by: Alex Sierra <alex.sierra@amd.com>
---
v5:
Remove devmem->pagemap.type = MEMORY_DEVICE_PRIVATE at
dmirror_allocate_chunk that was forcing to configure pagemap.type
to MEMORY_DEVICE_PRIVATE
v6:
Check for null pointers for resource and memremap references
at dmirror_allocate_chunk
v7:
Due to patch dropped from these patch series "kernel: resource:
lookup_resource as exported symbol", lookup_resource was not longer a
callable function. This was used in public device configuration, to
get start and end addresses, to create pgmap->range struct. This
information is now taken directly from the spm_addr_devX parameters and
the fixed size DEVMEM_CHUNK_SIZE.
---
lib/test_hmm.c | 66 +++++++++++++++++++++++++++++++--------------
lib/test_hmm_uapi.h | 1 +
2 files changed, 47 insertions(+), 20 deletions(-)
diff --git a/lib/test_hmm.c b/lib/test_hmm.c
index 3cd91ca31dd7..ef27e355738a 100644
--- a/lib/test_hmm.c
+++ b/lib/test_hmm.c
@@ -33,6 +33,16 @@
#define DEVMEM_CHUNK_SIZE (256 * 1024 * 1024U)
#define DEVMEM_CHUNKS_RESERVE 16
+static unsigned long spm_addr_dev0;
+module_param(spm_addr_dev0, long, 0644);
+MODULE_PARM_DESC(spm_addr_dev0,
+ "Specify start address for SPM (special purpose memory) used for device 0. By setting this Generic device type will be used. Make sure spm_addr_dev1 is set too");
+
+static unsigned long spm_addr_dev1;
+module_param(spm_addr_dev1, long, 0644);
+MODULE_PARM_DESC(spm_addr_dev1,
+ "Specify start address for SPM (special purpose memory) used for device 1. By setting this Generic device type will be used. Make sure spm_addr_dev0 is set too");
+
static const struct dev_pagemap_ops dmirror_devmem_ops;
static const struct mmu_interval_notifier_ops dmirror_min_ops;
static dev_t dmirror_dev;
@@ -450,11 +460,11 @@ static int dmirror_write(struct dmirror *dmirror, struct hmm_dmirror_cmd *cmd)
return ret;
}
-static bool dmirror_allocate_chunk(struct dmirror_device *mdevice,
+static int dmirror_allocate_chunk(struct dmirror_device *mdevice,
struct page **ppage)
{
struct dmirror_chunk *devmem;
- struct resource *res;
+ struct resource *res = NULL;
unsigned long pfn;
unsigned long pfn_first;
unsigned long pfn_last;
@@ -462,17 +472,29 @@ static bool dmirror_allocate_chunk(struct dmirror_device *mdevice,
devmem = kzalloc(sizeof(*devmem), GFP_KERNEL);
if (!devmem)
- return false;
+ return -ENOMEM;
- res = request_free_mem_region(&iomem_resource, DEVMEM_CHUNK_SIZE,
- "hmm_dmirror");
- if (IS_ERR(res))
- goto err_devmem;
+ if (!spm_addr_dev0 && !spm_addr_dev1) {
+ res = request_free_mem_region(&iomem_resource, DEVMEM_CHUNK_SIZE,
+ "hmm_dmirror");
+ if (IS_ERR_OR_NULL(res))
+ goto err_devmem;
+ devmem->pagemap.range.start = res->start;
+ devmem->pagemap.range.end = res->end;
+ devmem->pagemap.type = MEMORY_DEVICE_PRIVATE;
+ mdevice->zone_device_type = HMM_DMIRROR_MEMORY_DEVICE_PRIVATE;
+ } else if (spm_addr_dev0 && spm_addr_dev1) {
+ devmem->pagemap.range.start = MINOR(mdevice->cdevice.dev) ?
+ spm_addr_dev0 :
+ spm_addr_dev1;
+ devmem->pagemap.range.end = devmem->pagemap.range.start +
+ DEVMEM_CHUNK_SIZE - 1;
+ devmem->pagemap.type = MEMORY_DEVICE_PUBLIC;
+ mdevice->zone_device_type = HMM_DMIRROR_MEMORY_DEVICE_PUBLIC;
+ } else {
+ pr_err("Both spm_addr_dev parameters should be set\n");
+ }
- mdevice->zone_device_type = HMM_DMIRROR_MEMORY_DEVICE_PRIVATE;
- devmem->pagemap.type = MEMORY_DEVICE_PRIVATE;
- devmem->pagemap.range.start = res->start;
- devmem->pagemap.range.end = res->end;
devmem->pagemap.nr_range = 1;
devmem->pagemap.ops = &dmirror_devmem_ops;
devmem->pagemap.owner = mdevice;
@@ -493,10 +515,14 @@ static bool dmirror_allocate_chunk(struct dmirror_device *mdevice,
mdevice->devmem_capacity = new_capacity;
mdevice->devmem_chunks = new_chunks;
}
-
ptr = memremap_pages(&devmem->pagemap, numa_node_id());
- if (IS_ERR(ptr))
+ if (IS_ERR_OR_NULL(ptr)) {
+ if (ptr)
+ ret = PTR_ERR(ptr);
+ else
+ ret = -EFAULT;
goto err_release;
+ }
devmem->mdevice = mdevice;
pfn_first = devmem->pagemap.range.start >> PAGE_SHIFT;
@@ -529,7 +555,8 @@ static bool dmirror_allocate_chunk(struct dmirror_device *mdevice,
err_release:
mutex_unlock(&mdevice->devmem_lock);
- release_mem_region(devmem->pagemap.range.start, range_len(&devmem->pagemap.range));
+ if (res)
+ release_mem_region(devmem->pagemap.range.start, range_len(&devmem->pagemap.range));
err_devmem:
kfree(devmem);
@@ -1097,10 +1124,8 @@ static int dmirror_device_init(struct dmirror_device *mdevice, int id)
if (ret)
return ret;
- /* Build a list of free ZONE_DEVICE private struct pages */
- dmirror_allocate_chunk(mdevice, NULL);
-
- return 0;
+ /* Build a list of free ZONE_DEVICE struct pages */
+ return dmirror_allocate_chunk(mdevice, NULL);
}
static void dmirror_device_remove(struct dmirror_device *mdevice)
@@ -1113,8 +1138,9 @@ static void dmirror_device_remove(struct dmirror_device *mdevice)
mdevice->devmem_chunks[i];
memunmap_pages(&devmem->pagemap);
- release_mem_region(devmem->pagemap.range.start,
- range_len(&devmem->pagemap.range));
+ if (devmem->pagemap.type == MEMORY_DEVICE_PRIVATE)
+ release_mem_region(devmem->pagemap.range.start,
+ range_len(&devmem->pagemap.range));
kfree(devmem);
}
kfree(mdevice->devmem_chunks);
diff --git a/lib/test_hmm_uapi.h b/lib/test_hmm_uapi.h
index ee88701793d5..00259d994410 100644
--- a/lib/test_hmm_uapi.h
+++ b/lib/test_hmm_uapi.h
@@ -65,6 +65,7 @@ enum {
enum {
/* 0 is reserved to catch uninitialized type fields */
HMM_DMIRROR_MEMORY_DEVICE_PRIVATE = 1,
+ HMM_DMIRROR_MEMORY_DEVICE_PUBLIC,
};
#endif /* _LIB_TEST_HMM_UAPI_H */
--
2.32.0
next prev parent reply other threads:[~2021-09-13 16:16 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-13 16:15 [PATCH v2 00/12] MEMORY_DEVICE_PUBLIC for CPU-accessible coherent device memory Alex Sierra
2021-09-13 16:15 ` [PATCH v2 01/12] ext4/xfs: add page refcount helper Alex Sierra
2021-09-13 16:15 ` [PATCH v2 02/12] mm: remove extra ZONE_DEVICE struct page refcount Alex Sierra
2021-09-15 5:32 ` Ralph Campbell
2021-09-13 16:15 ` [PATCH v2 03/12] mm: add zone device public type memory support Alex Sierra
2021-09-13 16:15 ` [PATCH v2 04/12] mm: add device public vma selection for memory migration Alex Sierra
2021-09-13 16:15 ` [PATCH v2 05/12] drm/amdkfd: ref count init for device pages Alex Sierra
2021-09-13 16:15 ` [PATCH v2 06/12] drm/amdkfd: add SPM support for SVM Alex Sierra
2021-09-13 16:15 ` [PATCH v2 07/12] drm/amdkfd: public type as sys mem on migration to ram Alex Sierra
2021-09-13 16:16 ` [PATCH v2 08/12] lib: test_hmm add ioctl to get zone device type Alex Sierra
2021-09-13 16:16 ` Alex Sierra [this message]
2021-09-20 8:53 ` [PATCH v2 09/12] lib: test_hmm add module param for " Alistair Popple
2021-09-20 20:05 ` Sierra Guiza, Alejandro (Alex)
2021-09-21 5:14 ` Alistair Popple
2021-09-23 15:52 ` Sierra Guiza, Alejandro (Alex)
2021-10-01 0:28 ` Alistair Popple
2021-09-13 16:16 ` [PATCH v2 10/12] lib: add support for device public type in test_hmm Alex Sierra
2021-10-01 1:32 ` Alistair Popple
2021-09-13 16:16 ` [PATCH v2 11/12] tools: update hmm-test to support device public type Alex Sierra
2021-09-13 16:16 ` [PATCH v2 12/12] tools: update test_hmm script to support SP config Alex Sierra
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