soc: fsl: qe: add cpm_muram_free_addr() helper

Add a helper that takes a virtual address rather than the muram
offset. This will be used in a couple of places to avoid having to
store both the offset and the virtual address, as well as removing
NULL checks from the callers.
Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Acked-by: Li Yang <leoyang.li@nxp.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/soc/fsl/qe/qe_common.c

@@ -238,3 +238,15 @@ dma_addr_t cpm_muram_dma(void __iomem *addr)
 	return muram_pbase + (addr - muram_vbase);
 }
 EXPORT_SYMBOL(cpm_muram_dma);
+
+/*
+ * As cpm_muram_free, but takes the virtual address rather than the
+ * muram offset.
+ */
+void cpm_muram_free_addr(const void __iomem *addr)
+{
+	if (!addr)
+		return;
+	cpm_muram_free(cpm_muram_offset(addr));
+}
+EXPORT_SYMBOL(cpm_muram_free_addr);

include/soc/fsl/qe/qe.h

@@ -104,6 +104,7 @@ s32 cpm_muram_alloc_fixed(unsigned long offset, unsigned long size);
 void __iomem *cpm_muram_addr(unsigned long offset);
 unsigned long cpm_muram_offset(const void __iomem *addr);
 dma_addr_t cpm_muram_dma(void __iomem *addr);
+void cpm_muram_free_addr(const void __iomem *addr);
 #else
 static inline s32 cpm_muram_alloc(unsigned long size,
 				  unsigned long align)
@@ -135,6 +136,9 @@ static inline dma_addr_t cpm_muram_dma(void __iomem *addr)
 {
 	return 0;
 }
+static inline void cpm_muram_free_addr(const void __iomem *addr)
+{
+}
 #endif /* defined(CONFIG_CPM) || defined(CONFIG_QUICC_ENGINE) */
 
 /* QE PIO */
@@ -239,6 +243,7 @@ static inline int qe_alive_during_sleep(void)
 #define qe_muram_addr cpm_muram_addr
 #define qe_muram_offset cpm_muram_offset
 #define qe_muram_dma cpm_muram_dma
+#define qe_muram_free_addr cpm_muram_free_addr
 
 #ifdef CONFIG_PPC32
 #define qe_iowrite8(val, addr)     out_8(addr, val)