powerpc/powernv: rename remaining rng powernv_ functions to pnv_

The preferred nomenclature is pnv_, not powernv_, but rng.c used
powernv_ for some reason, which isn't consistent with the rest. A recent
commit added a few pnv_ functions to rng.c, making the file a bit of a
mishmash. This commit just replaces the rest of them.

Fixes: f3eac42 ("powerpc/powernv: wire up rng during setup_arch")
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Tested-by: Sachin Sant <sachinp@linux.ibm.com>
[mpe: Reorder after bug fix commits]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220727143219.2684192-3-mpe@ellerman.id.au

Author: zx2c4

arch/powerpc/include/asm/archrandom.h

@@ -38,7 +38,7 @@ static inline bool __must_check arch_get_random_seed_int(unsigned int *v)
 #endif /* CONFIG_ARCH_RANDOM */
 
 #ifdef CONFIG_PPC_POWERNV
-int powernv_get_random_long(unsigned long *v);
+int pnv_get_random_long(unsigned long *v);
 #endif
 
 #endif /* _ASM_POWERPC_ARCHRANDOM_H */

arch/powerpc/platforms/powernv/rng.c

@@ -21,15 +21,15 @@
 
 #define DARN_ERR 0xFFFFFFFFFFFFFFFFul
 
-struct powernv_rng {
+struct pnv_rng {
 	void __iomem *regs;
 	void __iomem *regs_real;
 	unsigned long mask;
 };
 
-static DEFINE_PER_CPU(struct powernv_rng *, powernv_rng);
+static DEFINE_PER_CPU(struct pnv_rng *, pnv_rng);
 
-static unsigned long rng_whiten(struct powernv_rng *rng, unsigned long val)
+static unsigned long rng_whiten(struct pnv_rng *rng, unsigned long val)
 {
 	unsigned long parity;
 
@@ -49,7 +49,7 @@ static unsigned long rng_whiten(struct powernv_rng *rng, unsigned long val)
 	return val;
 }
 
-static int powernv_get_random_darn(unsigned long *v)
+static int pnv_get_random_darn(unsigned long *v)
 {
 	unsigned long val;
 
@@ -73,31 +73,31 @@ static int __init initialise_darn(void)
 		return -ENODEV;
 
 	for (i = 0; i < 10; i++) {
-		if (powernv_get_random_darn(&val)) {
-			ppc_md.get_random_seed = powernv_get_random_darn;
+		if (pnv_get_random_darn(&val)) {
+			ppc_md.get_random_seed = pnv_get_random_darn;
 			return 0;
 		}
 	}
 	return -EIO;
 }
 
-int powernv_get_random_long(unsigned long *v)
+int pnv_get_random_long(unsigned long *v)
 {
-	struct powernv_rng *rng;
+	struct pnv_rng *rng;
 
 	if (mfmsr() & MSR_DR) {
-		rng = get_cpu_var(powernv_rng);
+		rng = get_cpu_var(pnv_rng);
 		*v = rng_whiten(rng, in_be64(rng->regs));
 		put_cpu_var(rng);
 	} else {
-		rng = raw_cpu_read(powernv_rng);
+		rng = raw_cpu_read(pnv_rng);
 		*v = rng_whiten(rng, __raw_rm_readq(rng->regs_real));
 	}
 	return 1;
 }
-EXPORT_SYMBOL_GPL(powernv_get_random_long);
+EXPORT_SYMBOL_GPL(pnv_get_random_long);
 
-static __init void rng_init_per_cpu(struct powernv_rng *rng,
+static __init void rng_init_per_cpu(struct pnv_rng *rng,
 				    struct device_node *dn)
 {
 	int chip_id, cpu;
@@ -107,16 +107,16 @@ static __init void rng_init_per_cpu(struct powernv_rng *rng,
 		pr_warn("No ibm,chip-id found for %pOF.\n", dn);
 
 	for_each_possible_cpu(cpu) {
-		if (per_cpu(powernv_rng, cpu) == NULL ||
+		if (per_cpu(pnv_rng, cpu) == NULL ||
 		    cpu_to_chip_id(cpu) == chip_id) {
-			per_cpu(powernv_rng, cpu) = rng;
+			per_cpu(pnv_rng, cpu) = rng;
 		}
 	}
 }
 
 static __init int rng_create(struct device_node *dn)
 {
-	struct powernv_rng *rng;
+	struct pnv_rng *rng;
 	struct resource res;
 	unsigned long val;
 
@@ -142,7 +142,7 @@ static __init int rng_create(struct device_node *dn)
 
 	rng_init_per_cpu(rng, dn);
 
-	ppc_md.get_random_seed = powernv_get_random_long;
+	ppc_md.get_random_seed = pnv_get_random_long;
 
 	return 0;
 }
@@ -190,7 +190,7 @@ static int __init pnv_rng_late_init(void)
 	if (ppc_md.get_random_seed == pnv_get_random_long_early)
 		pnv_get_random_long_early(&v);
 
-	if (ppc_md.get_random_seed == powernv_get_random_long) {
+	if (ppc_md.get_random_seed == pnv_get_random_long) {
 		for_each_compatible_node(dn, NULL, "ibm,power-rng")
 			of_platform_device_create(dn, NULL, NULL);
 	}

drivers/char/hw_random/powernv-rng.c

@@ -23,7 +23,7 @@ static int powernv_rng_read(struct hwrng *rng, void *data, size_t max, bool wait
 	buf = (unsigned long *)data;
 
 	for (i = 0; i < len; i++)
-		powernv_get_random_long(buf++);
+		pnv_get_random_long(buf++);
 
 	return len * sizeof(unsigned long);
 }