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SubjectRe: [PATCH RFC v2 18/18] tools/testing/cxl: Add Dynamic Capacity events
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On 8/28/23 22:21, Ira Weiny wrote:
> OS software needs to be alerted when new extents arrive on a Dynamic
> Capacity Device (DCD). On test DCDs extents are added through sysfs.
>
> Add events on DCD extent injection. Directly call the event irq
> callback to simulate irqs to process the test extents.
>
> Signed-off-by: Ira Weiny <ira.weiny@intel.com>

Reviewed-by: Dave Jiang <dave.jiang@intel.com>

> ---
> tools/testing/cxl/test/mem.c | 57 ++++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 57 insertions(+)
>
> diff --git a/tools/testing/cxl/test/mem.c b/tools/testing/cxl/test/mem.c
> index d6041a2145c5..20364fee9df9 100644
> --- a/tools/testing/cxl/test/mem.c
> +++ b/tools/testing/cxl/test/mem.c
> @@ -2008,6 +2008,41 @@ static bool new_extent_valid(struct device *dev, size_t new_start,
> return false;
> }
>
> +struct dcd_event_dyn_cap dcd_event_rec_template = {
> + .hdr = {
> + .id = UUID_INIT(0xca95afa7, 0xf183, 0x4018,
> + 0x8c, 0x2f, 0x95, 0x26, 0x8e, 0x10, 0x1a, 0x2a),
> + .length = sizeof(struct dcd_event_dyn_cap),
> + },
> +};
> +
> +static int send_dc_event(struct mock_event_store *mes, enum dc_event type,
> + u64 start, u64 length, const char *tag_str)
> +{
> + struct device *dev = mes->mds->cxlds.dev;
> + struct dcd_event_dyn_cap *dcd_event_rec;
> +
> + dcd_event_rec = devm_kzalloc(dev, sizeof(*dcd_event_rec), GFP_KERNEL);
> + if (!dcd_event_rec)
> + return -ENOMEM;
> +
> + memcpy(dcd_event_rec, &dcd_event_rec_template, sizeof(*dcd_event_rec));
> + dcd_event_rec->data.event_type = type;
> + dcd_event_rec->data.extent.start_dpa = cpu_to_le64(start);
> + dcd_event_rec->data.extent.length = cpu_to_le64(length);
> + memcpy(dcd_event_rec->data.extent.tag, tag_str,
> + min(sizeof(dcd_event_rec->data.extent.tag),
> + strlen(tag_str)));
> +
> + mes_add_event(mes, CXL_EVENT_TYPE_DCD,
> + (struct cxl_event_record_raw *)dcd_event_rec);
> +
> + /* Fake the irq */
> + cxl_mem_get_event_records(mes->mds, CXLDEV_EVENT_STATUS_DCD);
> +
> + return 0;
> +}
> +
> /*
> * Format <start>:<length>:<tag>
> *
> @@ -2021,6 +2056,7 @@ static ssize_t dc_inject_extent_store(struct device *dev,
> const char *buf, size_t count)
> {
> char *start_str __free(kfree) = kstrdup(buf, GFP_KERNEL);
> + struct cxl_mockmem_data *mdata = dev_get_drvdata(dev);
> unsigned long long start, length;
> char *len_str, *tag_str;
> size_t buf_len = count;
> @@ -2063,6 +2099,13 @@ static ssize_t dc_inject_extent_store(struct device *dev,
> if (rc)
> return rc;
>
> + rc = send_dc_event(&mdata->mes, DCD_ADD_CAPACITY, start, length,
> + tag_str);
> + if (rc) {
> + dev_err(dev, "Failed to add event %d\n", rc);
> + return rc;
> + }
> +
> return count;
> }
> static DEVICE_ATTR_WO(dc_inject_extent);
> @@ -2071,6 +2114,7 @@ static ssize_t dc_del_extent_store(struct device *dev,
> struct device_attribute *attr,
> const char *buf, size_t count)
> {
> + struct cxl_mockmem_data *mdata = dev_get_drvdata(dev);
> unsigned long long start;
> int rc;
>
> @@ -2083,6 +2127,12 @@ static ssize_t dc_del_extent_store(struct device *dev,
> if (rc)
> return rc;
>
> + rc = send_dc_event(&mdata->mes, DCD_RELEASE_CAPACITY, start, 0, "");
> + if (rc) {
> + dev_err(dev, "Failed to add event %d\n", rc);
> + return rc;
> + }
> +
> return count;
> }
> static DEVICE_ATTR_WO(dc_del_extent);
> @@ -2111,6 +2161,13 @@ static ssize_t dc_force_del_extent_store(struct device *dev,
> if (rc)
> return rc;
>
> + rc = send_dc_event(&mdata->mes, DCD_FORCED_CAPACITY_RELEASE,
> + start, 0, "");
> + if (rc) {
> + dev_err(dev, "Failed to add event %d\n", rc);
> + return rc;
> + }
> +
> return count;
> }
> static DEVICE_ATTR_WO(dc_force_del_extent);
>

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