[COMMON] iommu/exynos: display sysmmu name when fault occurred

In case of sysmmu page fault, it was difficult to distinguish the owner
of invalid request. This patch displays sysmmu name to improve
readability.

Change-Id: I2a11a503c4ad64eaa819e8f76640c3dffc999d00
Signed-off-by: Janghyuck Kim <janghyuck.kim@samsung.com>

diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c
index 7a20cc63ad5b97978e1b2cf37c37cb25b07995e6..87fb55682b55b359fad757e9dd20b034282b9b0f 100644 (file)
--- a/drivers/iommu/exynos-iommu.c
+++ b/drivers/iommu/exynos-iommu.c
@@ -310,15 +310,19 @@ static void show_secure_fault_information(struct sysmmu_drvdata *drvdata,
        phys_addr_t pgtable;
        int fault_id = SYSMMU_FAULT_ID(flags);
        unsigned int sfrbase = drvdata->securebase;
+       const char *port_name = NULL;
 
        pgtable = __secure_info_read(sfrbase + REG_PT_BASE_PPN);
        pgtable <<= PAGE_SHIFT;
 
        info = __secure_info_read(sfrbase + REG_FAULT_TRANS_INFO);
 
+       of_property_read_string(drvdata->sysmmu->of_node,
+                                       "port-name", &port_name);
+
        pr_crit("----------------------------------------------------------\n");
-       pr_crit("%s %s %s at %#010lx (page table @ %pa)\n",
-               dev_name(drvdata->sysmmu),
+       pr_crit("From [%s], SysMMU %s %s at %#010lx (page table @ %pa)\n",
+               port_name ? port_name : dev_name(drvdata->sysmmu),
                (flags & IOMMU_FAULT_WRITE) ? "WRITE" : "READ",
                sysmmu_fault_name[fault_id], fault_addr, &pgtable);
 
@@ -367,6 +371,7 @@ static void show_fault_information(struct sysmmu_drvdata *drvdata,
        unsigned int info;
        phys_addr_t pgtable;
        int fault_id = SYSMMU_FAULT_ID(flags);
+       const char *port_name = NULL;
 
        pgtable = __raw_readl(drvdata->sfrbase + REG_PT_BASE_PPN);
        pgtable <<= PAGE_SHIFT;
@@ -380,9 +385,12 @@ static void show_fault_information(struct sysmmu_drvdata *drvdata,
                         REG_FAULT_AW_TRANS_INFO : REG_FAULT_AR_TRANS_INFO));
        }
 
+       of_property_read_string(drvdata->sysmmu->of_node,
+                                       "port-name", &port_name);
+
        pr_crit("----------------------------------------------------------\n");
-       pr_crit("%s %s %s at %#010lx (page table @ %pa)\n",
-               dev_name(drvdata->sysmmu),
+       pr_crit("From [%s], SysMMU %s %s at %#010lx (page table @ %pa)\n",
+               port_name ? port_name : dev_name(drvdata->sysmmu),
                (flags & IOMMU_FAULT_WRITE) ? "WRITE" : "READ",
                sysmmu_fault_name[fault_id], fault_addr, &pgtable);