tools/testing/cxl: Add "Get Security State" opcode support

Add the emulation support for handling "Get Security State" opcode for a
CXL memory device for the cxl_test. The function will copy back device
security state bitmask to the output payload.

The security state data is added as platform_data for the mock mem device.

Reviewed-by: Davidlohr Bueso <dave@stgolabs.net>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/166983610177.2734609.4953959949148428755.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

diff --git a/tools/testing/cxl/test/mem.c b/tools/testing/cxl/test/mem.c
index aa2df3a150518d33f4a793c46284758d0522bcce..d67fc04bf0cf39aa74bed02f1014346d2c88d65d 100644 (file)
--- a/tools/testing/cxl/test/mem.c
+++ b/tools/testing/cxl/test/mem.c
@@ -65,6 +65,11 @@ static struct {
        },
 };
 
+struct cxl_mockmem_data {
+       void *lsa;
+       u32 security_state;
+};
+
 static int mock_gsl(struct cxl_mbox_cmd *cmd)
 {
        if (cmd->size_out < sizeof(mock_gsl_payload))
@@ -137,10 +142,27 @@ static int mock_partition_info(struct cxl_dev_state *cxlds,
        return 0;
 }
 
+static int mock_get_security_state(struct cxl_dev_state *cxlds,
+                                  struct cxl_mbox_cmd *cmd)
+{
+       struct cxl_mockmem_data *mdata = dev_get_drvdata(cxlds->dev);
+
+       if (cmd->size_in)
+               return -EINVAL;
+
+       if (cmd->size_out != sizeof(u32))
+               return -EINVAL;
+
+       memcpy(cmd->payload_out, &mdata->security_state, sizeof(u32));
+
+       return 0;
+}
+
 static int mock_get_lsa(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd)
 {
        struct cxl_mbox_get_lsa *get_lsa = cmd->payload_in;
-       void *lsa = dev_get_drvdata(cxlds->dev);
+       struct cxl_mockmem_data *mdata = dev_get_drvdata(cxlds->dev);
+       void *lsa = mdata->lsa;
        u32 offset, length;
 
        if (sizeof(*get_lsa) > cmd->size_in)
@@ -159,7 +181,8 @@ static int mock_get_lsa(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd)
 static int mock_set_lsa(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd)
 {
        struct cxl_mbox_set_lsa *set_lsa = cmd->payload_in;
-       void *lsa = dev_get_drvdata(cxlds->dev);
+       struct cxl_mockmem_data *mdata = dev_get_drvdata(cxlds->dev);
+       void *lsa = mdata->lsa;
        u32 offset, length;
 
        if (sizeof(*set_lsa) > cmd->size_in)
@@ -230,6 +253,9 @@ static int cxl_mock_mbox_send(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *
        case CXL_MBOX_OP_GET_HEALTH_INFO:
                rc = mock_health_info(cxlds, cmd);
                break;
+       case CXL_MBOX_OP_GET_SECURITY_STATE:
+               rc = mock_get_security_state(cxlds, cmd);
+               break;
        default:
                break;
        }
@@ -250,16 +276,20 @@ static int cxl_mock_mem_probe(struct platform_device *pdev)
        struct device *dev = &pdev->dev;
        struct cxl_memdev *cxlmd;
        struct cxl_dev_state *cxlds;
-       void *lsa;
+       struct cxl_mockmem_data *mdata;
        int rc;
 
-       lsa = vmalloc(LSA_SIZE);
-       if (!lsa)
+       mdata = devm_kzalloc(dev, sizeof(*mdata), GFP_KERNEL);
+       if (!mdata)
+               return -ENOMEM;
+       dev_set_drvdata(dev, mdata);
+
+       mdata->lsa = vmalloc(LSA_SIZE);
+       if (!mdata->lsa)
                return -ENOMEM;
-       rc = devm_add_action_or_reset(dev, label_area_release, lsa);
+       rc = devm_add_action_or_reset(dev, label_area_release, mdata->lsa);
        if (rc)
                return rc;
-       dev_set_drvdata(dev, lsa);
 
        cxlds = cxl_dev_state_create(dev);
        if (IS_ERR(cxlds))