diff options
Diffstat (limited to 'drivers/misc')
| -rw-r--r-- | drivers/misc/habanalabs/common/memory.c | 56 |
1 files changed, 50 insertions, 6 deletions
diff --git a/drivers/misc/habanalabs/common/memory.c b/drivers/misc/habanalabs/common/memory.c index 75dd18771868..f885812d9939 100644 --- a/drivers/misc/habanalabs/common/memory.c +++ b/drivers/misc/habanalabs/common/memory.c @@ -1236,18 +1236,35 @@ int hl_mem_ioctl(struct hl_fpriv *hpriv, void *data) switch (args->in.op) { case HL_MEM_OP_ALLOC: - if (!hdev->dram_supports_virtual_memory) { - dev_err(hdev->dev, "DRAM alloc is not supported\n"); - rc = -EINVAL; - goto out; - } - if (args->in.alloc.mem_size == 0) { dev_err(hdev->dev, "alloc size must be larger than 0\n"); rc = -EINVAL; goto out; } + + /* If DRAM does not support virtual memory the driver won't + * handle the allocation/freeing of that memory. However, for + * system administration/monitoring purposes, the driver will + * keep track of the amount of DRAM memory that is allocated + * and freed by the user. Because this code totally relies on + * the user's input, the driver can't ensure the validity + * of this accounting. + */ + if (!hdev->dram_supports_virtual_memory) { + atomic64_add(args->in.alloc.mem_size, + &ctx->dram_phys_mem); + atomic64_add(args->in.alloc.mem_size, + &hdev->dram_used_mem); + + dev_dbg(hdev->dev, "DRAM alloc is not supported\n"); + rc = 0; + + memset(args, 0, sizeof(*args)); + args->out.handle = 0; + goto out; + } + rc = alloc_device_memory(ctx, &args->in, &handle); memset(args, 0, sizeof(*args)); @@ -1255,6 +1272,26 @@ int hl_mem_ioctl(struct hl_fpriv *hpriv, void *data) break; case HL_MEM_OP_FREE: + /* If DRAM does not support virtual memory the driver won't + * handle the allocation/freeing of that memory. However, for + * system administration/monitoring purposes, the driver will + * keep track of the amount of DRAM memory that is allocated + * and freed by the user. Because this code totally relies on + * the user's input, the driver can't ensure the validity + * of this accounting. + */ + if (!hdev->dram_supports_virtual_memory) { + atomic64_sub(args->in.alloc.mem_size, + &ctx->dram_phys_mem); + atomic64_sub(args->in.alloc.mem_size, + &hdev->dram_used_mem); + + dev_dbg(hdev->dev, "DRAM alloc is not supported\n"); + rc = 0; + + goto out; + } + rc = free_device_memory(ctx, args->in.free.handle); break; @@ -1773,6 +1810,13 @@ void hl_vm_ctx_fini(struct hl_ctx *ctx) mutex_destroy(&ctx->mem_hash_lock); hl_mmu_ctx_fini(ctx); + + /* In this case we need to clear the global accounting of DRAM usage + * because the user notifies us on allocations. If the user is no more, + * all DRAM is available + */ + if (!ctx->hdev->dram_supports_virtual_memory) + atomic64_set(&ctx->hdev->dram_used_mem, 0); } /* |