From: Helge Deller <deller@gmx.de>
Date: Thu, 10 Aug 2023 17:56:19 +0000 (+0200)
Subject: parisc: Move proc_mckinley_root and proc_runway_root to sba_iommu
X-Git-Tag: v6.6.7~2212^2~5
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=547259580dfa9a5d345dd1b46fd5e9977654c1cc;p=platform%2Fkernel%2Flinux-starfive.git

parisc: Move proc_mckinley_root and proc_runway_root to sba_iommu

Clean up the procfs root entries for gsc, runway, and mckinley busses.

Signed-off-by: Helge Deller <deller@gmx.de>
---

diff --git a/arch/parisc/kernel/pci-dma.c b/arch/parisc/kernel/pci-dma.c
index 131d596..bf9f192 100644
--- a/arch/parisc/kernel/pci-dma.c
+++ b/arch/parisc/kernel/pci-dma.c
@@ -381,7 +381,7 @@ pcxl_dma_init(void)
 	pcxl_res_map = (char *)__get_free_pages(GFP_KERNEL,
 					    get_order(pcxl_res_size));
 	memset(pcxl_res_map, 0, pcxl_res_size);
-	proc_gsc_root = proc_mkdir("gsc", NULL);
+	proc_gsc_root = proc_mkdir("bus/gsc", NULL);
 	if (!proc_gsc_root)
     		printk(KERN_WARNING
 			"pcxl_dma_init: Unable to create gsc /proc dir entry\n");
diff --git a/arch/parisc/kernel/setup.c b/arch/parisc/kernel/setup.c
index 573f830..211a4af 100644
--- a/arch/parisc/kernel/setup.c
+++ b/arch/parisc/kernel/setup.c
@@ -40,11 +40,6 @@
 
 static char __initdata command_line[COMMAND_LINE_SIZE];
 
-/* Intended for ccio/sba/cpu statistics under /proc/bus/{runway|gsc} */
-struct proc_dir_entry * proc_runway_root __read_mostly = NULL;
-struct proc_dir_entry * proc_gsc_root __read_mostly = NULL;
-struct proc_dir_entry * proc_mckinley_root __read_mostly = NULL;
-
 static void __init setup_cmdline(char **cmdline_p)
 {
 	extern unsigned int boot_args[];
@@ -196,48 +191,6 @@ const struct seq_operations cpuinfo_op = {
 	.show	= show_cpuinfo
 };
 
-static void __init parisc_proc_mkdir(void)
-{
-	/*
-	** Can't call proc_mkdir() until after proc_root_init() has been
-	** called by start_kernel(). In other words, this code can't
-	** live in arch/.../setup.c because start_parisc() calls
-	** start_kernel().
-	*/
-	switch (boot_cpu_data.cpu_type) {
-	case pcxl:
-	case pcxl2:
-		if (NULL == proc_gsc_root)
-		{
-			proc_gsc_root = proc_mkdir("bus/gsc", NULL);
-		}
-		break;
-        case pcxt_:
-        case pcxu:
-        case pcxu_:
-        case pcxw:
-        case pcxw_:
-        case pcxw2:
-                if (NULL == proc_runway_root)
-                {
-                        proc_runway_root = proc_mkdir("bus/runway", NULL);
-                }
-                break;
-	case mako:
-	case mako2:
-                if (NULL == proc_mckinley_root)
-                {
-                        proc_mckinley_root = proc_mkdir("bus/mckinley", NULL);
-                }
-                break;
-	default:
-		/* FIXME: this was added to prevent the compiler 
-		 * complaining about missing pcx, pcxs and pcxt
-		 * I'm assuming they have neither gsc nor runway */
-		break;
-	}
-}
-
 static struct resource central_bus = {
 	.name	= "Central Bus",
 	.start	= F_EXTEND(0xfff80000),
@@ -294,7 +247,6 @@ static int __init parisc_init(void)
 {
 	u32 osid = (OS_ID_LINUX << 16);
 
-	parisc_proc_mkdir();
 	parisc_init_resources();
 	do_device_inventory();                  /* probe for hardware */
 
diff --git a/drivers/parisc/sba_iommu.c b/drivers/parisc/sba_iommu.c
index bf3405f..8b1dcd5 100644
--- a/drivers/parisc/sba_iommu.c
+++ b/drivers/parisc/sba_iommu.c
@@ -121,6 +121,8 @@ module_param(sba_reserve_agpgart, int, 0444);
 MODULE_PARM_DESC(sba_reserve_agpgart, "Reserve half of IO pdir as AGPGART");
 #endif
 
+struct proc_dir_entry *proc_runway_root __ro_after_init;
+struct proc_dir_entry *proc_mckinley_root __ro_after_init;
 
 /************************************
 ** SBA register read and write support
@@ -1968,11 +1970,15 @@ static int __init sba_driver_callback(struct parisc_device *dev)
 #ifdef CONFIG_PROC_FS
 	switch (dev->id.hversion) {
 	case PLUTO_MCKINLEY_PORT:
+		if (!proc_mckinley_root)
+			proc_mckinley_root = proc_mkdir("bus/mckinley", NULL);
 		root = proc_mckinley_root;
 		break;
 	case ASTRO_RUNWAY_PORT:
 	case IKE_MERCED_PORT:
 	default:
+		if (!proc_runway_root)
+			proc_runway_root = proc_mkdir("bus/runway", NULL);
 		root = proc_runway_root;
 		break;
 	}