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arc=pass ("microsoft.com:s=arcselector9901:i=1"); spf=pass (imf29.hostedemail.com: domain of Alex.Sierra@amd.com designates 40.107.101.62 as permitted sender) smtp.mailfrom=Alex.Sierra@amd.com; dmarc=pass (policy=quarantine) header.from=amd.com X-Rspam-User: X-Stat-Signature: km3cqnjjfjcx5wdrh5k395fek8tusty5 X-HE-Tag: 1656375330-170013 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: In order to configure device coherent 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 Acked-by: Felix Kuehling Reviewed-by: Alistair Poppple Signed-off-by: Christoph Hellwig --- lib/test_hmm.c | 73 ++++++++++++++++++++++++++++++++------------- lib/test_hmm_uapi.h | 1 + 2 files changed, 53 insertions(+), 21 deletions(-) diff --git a/lib/test_hmm.c b/lib/test_hmm.c index 915ef6b5b0d4..afb30af9f3ff 100644 --- a/lib/test_hmm.c +++ b/lib/test_hmm.c @@ -37,6 +37,16 @@ #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 Coherent device type will be used. Make sure spm_addr_dev1 is set too. Minimum SPM size should be DEVMEM_CHUNK_SIZE."); + +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 Coherent device type will be used. Make sure spm_addr_dev0 is set too. Minimum SPM size should be DEVMEM_CHUNK_SIZE."); + static const struct dev_pagemap_ops dmirror_devmem_ops; static const struct mmu_interval_notifier_ops dmirror_min_ops; static dev_t dmirror_dev; @@ -455,28 +465,44 @@ 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; void *ptr; + int ret = -ENOMEM; devmem = kzalloc(sizeof(*devmem), GFP_KERNEL); if (!devmem) - return false; + return ret; - res = request_free_mem_region(&iomem_resource, DEVMEM_CHUNK_SIZE, - "hmm_dmirror"); - if (IS_ERR(res)) + switch (mdevice->zone_device_type) { + case HMM_DMIRROR_MEMORY_DEVICE_PRIVATE: + 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; + break; + case HMM_DMIRROR_MEMORY_DEVICE_COHERENT: + devmem->pagemap.range.start = (MINOR(mdevice->cdevice.dev) - 2) ? + spm_addr_dev0 : + spm_addr_dev1; + devmem->pagemap.range.end = devmem->pagemap.range.start + + DEVMEM_CHUNK_SIZE - 1; + devmem->pagemap.type = MEMORY_DEVICE_COHERENT; + break; + default: + ret = -EINVAL; goto err_devmem; + } - 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; @@ -497,10 +523,14 @@ 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; @@ -529,15 +559,17 @@ static bool dmirror_allocate_chunk(struct dmirror_device *mdevice, } spin_unlock(&mdevice->lock); - return true; + return 0; err_release: mutex_unlock(&mdevice->devmem_lock); - release_mem_region(devmem->pagemap.range.start, range_len(&devmem->pagemap.range)); + if (res && devmem->pagemap.type == MEMORY_DEVICE_PRIVATE) + release_mem_region(devmem->pagemap.range.start, + range_len(&devmem->pagemap.range)); err_devmem: kfree(devmem); - return false; + return ret; } static struct page *dmirror_devmem_alloc_page(struct dmirror_device *mdevice) @@ -562,7 +594,7 @@ static struct page *dmirror_devmem_alloc_page(struct dmirror_device *mdevice) spin_unlock(&mdevice->lock); } else { spin_unlock(&mdevice->lock); - if (!dmirror_allocate_chunk(mdevice, &dpage)) + if (dmirror_allocate_chunk(mdevice, &dpage)) goto error; } @@ -1232,10 +1264,8 @@ 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) @@ -1248,8 +1278,9 @@ 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 0511af7464ee..f700da7807c1 100644 --- a/lib/test_hmm_uapi.h +++ b/lib/test_hmm_uapi.h @@ -66,6 +66,7 @@ enum { enum { /* 0 is reserved to catch uninitialized type fields */ HMM_DMIRROR_MEMORY_DEVICE_PRIVATE = 1, + HMM_DMIRROR_MEMORY_DEVICE_COHERENT, }; #endif /* _LIB_TEST_HMM_UAPI_H */