soc: qcom: socinfo: Expose image information

The socinfo driver provides information about version of the various
images loaded in the system. Expose this to user space for debugging
purpose.

Tested-by: Vinod Koul <vkoul@kernel.org>
Reviewed-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Vaishali Thakkar <vaishali.thakkar@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

diff --git a/drivers/soc/qcom/socinfo.c b/drivers/soc/qcom/socinfo.c
index 6a47954..855353b 100644 (file)
--- a/drivers/soc/qcom/socinfo.c
+++ b/drivers/soc/qcom/socinfo.c
@@ -32,6 +32,39 @@
 #define SMEM_HW_SW_BUILD_ID            137
 
 #ifdef CONFIG_DEBUG_FS
+#define SMEM_IMAGE_VERSION_BLOCKS_COUNT        32
+#define SMEM_IMAGE_VERSION_SIZE                4096
+#define SMEM_IMAGE_VERSION_NAME_SIZE           75
+#define SMEM_IMAGE_VERSION_VARIANT_SIZE        20
+#define SMEM_IMAGE_VERSION_OEM_SIZE            32
+
+/*
+ * SMEM Image table indices
+ */
+#define SMEM_IMAGE_TABLE_BOOT_INDEX     0
+#define SMEM_IMAGE_TABLE_TZ_INDEX       1
+#define SMEM_IMAGE_TABLE_RPM_INDEX      3
+#define SMEM_IMAGE_TABLE_APPS_INDEX     10
+#define SMEM_IMAGE_TABLE_MPSS_INDEX     11
+#define SMEM_IMAGE_TABLE_ADSP_INDEX     12
+#define SMEM_IMAGE_TABLE_CNSS_INDEX     13
+#define SMEM_IMAGE_TABLE_VIDEO_INDEX    14
+#define SMEM_IMAGE_VERSION_TABLE       469
+
+/*
+ * SMEM Image table names
+ */
+static const char *const socinfo_image_names[] = {
+       [SMEM_IMAGE_TABLE_ADSP_INDEX] = "adsp",
+       [SMEM_IMAGE_TABLE_APPS_INDEX] = "apps",
+       [SMEM_IMAGE_TABLE_BOOT_INDEX] = "boot",
+       [SMEM_IMAGE_TABLE_CNSS_INDEX] = "cnss",
+       [SMEM_IMAGE_TABLE_MPSS_INDEX] = "mpss",
+       [SMEM_IMAGE_TABLE_RPM_INDEX] = "rpm",
+       [SMEM_IMAGE_TABLE_TZ_INDEX] = "tz",
+       [SMEM_IMAGE_TABLE_VIDEO_INDEX] = "video",
+};
+
 static const char *const pmic_models[] = {
        [0]  = "Unknown PMIC model",
        [9]  = "PM8994",
@@ -103,6 +136,13 @@ struct socinfo_params {
        u32 hw_plat;
        u32 fmt;
 };
+
+struct smem_image_version {
+       char name[SMEM_IMAGE_VERSION_NAME_SIZE];
+       char variant[SMEM_IMAGE_VERSION_VARIANT_SIZE];
+       char pad;
+       char oem[SMEM_IMAGE_VERSION_OEM_SIZE];
+};
 #endif /* CONFIG_DEBUG_FS */
 
 struct qcom_socinfo {
@@ -230,10 +270,37 @@ QCOM_OPEN(build_id, qcom_show_build_id);
 QCOM_OPEN(pmic_model, qcom_show_pmic_model);
 QCOM_OPEN(pmic_die_rev, qcom_show_pmic_die_revision);
 
+#define DEFINE_IMAGE_OPS(type)                                 \
+static int show_image_##type(struct seq_file *seq, void *p)              \
+{                                                                \
+       struct smem_image_version *image_version = seq->private;  \
+       seq_puts(seq, image_version->type);                       \
+       seq_puts(seq, "\n");                                      \
+       return 0;                                                 \
+}                                                                \
+static int open_image_##type(struct inode *inode, struct file *file)     \
+{                                                                        \
+       return single_open(file, show_image_##type, inode->i_private); \
+}                                                                        \
+                                                                         \
+static const struct file_operations qcom_image_##type##_ops = {          \
+       .open = open_image_##type,                                        \
+       .read = seq_read,                                                 \
+       .llseek = seq_lseek,                                              \
+       .release = single_release,                                        \
+}
+
+DEFINE_IMAGE_OPS(name);
+DEFINE_IMAGE_OPS(variant);
+DEFINE_IMAGE_OPS(oem);
+
 static void socinfo_debugfs_init(struct qcom_socinfo *qcom_socinfo,
                                 struct socinfo *info)
 {
+       struct smem_image_version *versions;
+       struct dentry *dentry;
        size_t size;
+       int i;
 
        qcom_socinfo->dbg_root = debugfs_create_dir("qcom_socinfo", NULL);
 
@@ -302,6 +369,23 @@ static void socinfo_debugfs_init(struct qcom_socinfo *qcom_socinfo,
                DEBUGFS_ADD(info, build_id);
                break;
        }
+
+       versions = qcom_smem_get(QCOM_SMEM_HOST_ANY, SMEM_IMAGE_VERSION_TABLE,
+                                &size);
+
+       for (i = 0; i < ARRAY_SIZE(socinfo_image_names); i++) {
+               if (!socinfo_image_names[i])
+                       continue;
+
+               dentry = debugfs_create_dir(socinfo_image_names[i],
+                                           qcom_socinfo->dbg_root);
+               debugfs_create_file("name", 0400, dentry, &versions[i],
+                                   &qcom_image_name_ops);
+               debugfs_create_file("variant", 0400, dentry, &versions[i],
+                                   &qcom_image_variant_ops);
+               debugfs_create_file("oem", 0400, dentry, &versions[i],
+                                   &qcom_image_oem_ops);
+       }
 }
 
 static void socinfo_debugfs_exit(struct qcom_socinfo *qcom_socinfo)