diff options
Diffstat (limited to 'drivers/cxl/core/pmu.c')
-rw-r--r-- | drivers/cxl/core/pmu.c | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/drivers/cxl/core/pmu.c b/drivers/cxl/core/pmu.c new file mode 100644 index 000000000000..7684c843e5a5 --- /dev/null +++ b/drivers/cxl/core/pmu.c @@ -0,0 +1,68 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* Copyright(c) 2023 Huawei. All rights reserved. */ + +#include <linux/device.h> +#include <linux/slab.h> +#include <linux/idr.h> +#include <cxlmem.h> +#include <pmu.h> +#include <cxl.h> +#include "core.h" + +static void cxl_pmu_release(struct device *dev) +{ + struct cxl_pmu *pmu = to_cxl_pmu(dev); + + kfree(pmu); +} + +const struct device_type cxl_pmu_type = { + .name = "cxl_pmu", + .release = cxl_pmu_release, +}; + +static void remove_dev(void *dev) +{ + device_del(dev); +} + +int devm_cxl_pmu_add(struct device *parent, struct cxl_pmu_regs *regs, + int assoc_id, int index, enum cxl_pmu_type type) +{ + struct cxl_pmu *pmu; + struct device *dev; + int rc; + + pmu = kzalloc(sizeof(*pmu), GFP_KERNEL); + if (!pmu) + return -ENOMEM; + + pmu->assoc_id = assoc_id; + pmu->index = index; + pmu->type = type; + pmu->base = regs->pmu; + dev = &pmu->dev; + device_initialize(dev); + device_set_pm_not_required(dev); + dev->parent = parent; + dev->bus = &cxl_bus_type; + dev->type = &cxl_pmu_type; + switch (pmu->type) { + case CXL_PMU_MEMDEV: + rc = dev_set_name(dev, "pmu_mem%d.%d", assoc_id, index); + break; + } + if (rc) + goto err; + + rc = device_add(dev); + if (rc) + goto err; + + return devm_add_action_or_reset(parent, remove_dev, dev); + +err: + put_device(&pmu->dev); + return rc; +} +EXPORT_SYMBOL_NS_GPL(devm_cxl_pmu_add, CXL); |