ALSA: ctxfi - Remove PAGE_SIZE limitation

Remove the limitation of PAGE_SIZE to be 4k by defining the own
page size and macros for 4k.  8kb page size could be natively supported,
but it's disabled right now for simplicity.

Also, clean up using upper_32_bits() macro.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/Kconfig

@@ -277,7 +277,6 @@ config SND_CS5535AUDIO
 
 config SND_CTXFI
 	tristate "Creative Sound Blaster X-Fi"
-	depends on X86
 	select SND_PCM
 	help
 	  If you want to use soundcards based on Creative Sound Blastr X-Fi

sound/pci/ctxfi/cthw20k1.c

@@ -1249,18 +1249,14 @@ static int hw_trn_init(struct hw *hw, const struct trn_conf *info)
 	}
 
 	trnctl = 0x13;  /* 32-bit, 4k-size page */
-#if BITS_PER_LONG == 64
-	ptp_phys_low = info->vm_pgt_phys & ((1UL<<32)-1);
-	ptp_phys_high = (info->vm_pgt_phys>>32) & ((1UL<<32)-1);
-	trnctl |= (1<<2);
-#elif BITS_PER_LONG == 32
-	ptp_phys_low = info->vm_pgt_phys & (~0UL);
-	ptp_phys_high = 0;
-#else
-#	error "Unknown BITS_PER_LONG!"
-#endif
+	ptp_phys_low = (u32)info->vm_pgt_phys;
+	ptp_phys_high = upper_32_bits(info->vm_pgt_phys);
+	if (sizeof(void *) == 8) /* 64bit address */
+		trnctl |= (1 << 2);
+#if 0 /* Only 4k h/w pages for simplicitiy */
 #if PAGE_SIZE == 8192
 	trnctl |= (1<<5);
+#endif
 #endif
 	hw_write_20kx(hw, PTPALX, ptp_phys_low);
 	hw_write_20kx(hw, PTPAHX, ptp_phys_high);

sound/pci/ctxfi/cthw20k2.c

@@ -1203,19 +1203,10 @@ static int hw_trn_init(struct hw *hw, const struct trn_conf *info)
 	}
 
 	vmctl = 0x80000C0F;  /* 32-bit, 4k-size page */
-#if BITS_PER_LONG == 64
-	ptp_phys_low = info->vm_pgt_phys & ((1UL<<32)-1);
-	ptp_phys_high = (info->vm_pgt_phys>>32) & ((1UL<<32)-1);
-	vmctl |= (3<<8);
-#elif BITS_PER_LONG == 32
-	ptp_phys_low = info->vm_pgt_phys & (~0UL);
-	ptp_phys_high = 0;
-#else
-#	error "Unknown BITS_PER_LONG!"
-#endif
-#if PAGE_SIZE == 8192
-#	error "Don't support 8k-page!"
-#endif
+	ptp_phys_low = (u32)info->vm_pgt_phys;
+	ptp_phys_high = upper_32_bits(info->vm_pgt_phys);
+	if (sizeof(void *) == 8) /* 64bit address */
+		vmctl |= (3 << 8);
 	/* Write page table physical address to all PTPAL registers */
 	for (i = 0; i < 64; i++) {
 		hw_write_20kx(hw, VMEM_PTPAL+(16*i), ptp_phys_low);

sound/pci/ctxfi/ctvmem.c

@@ -18,12 +18,11 @@
 #include "ctvmem.h"
 #include <linux/slab.h>
 #include <linux/mm.h>
-#include <asm/page.h>	/* for PAGE_SIZE macro definition */
 #include <linux/io.h>
 #include <asm/pgtable.h>
 
-#define CT_PTES_PER_PAGE (PAGE_SIZE / sizeof(void *))
-#define CT_ADDRS_PER_PAGE (CT_PTES_PER_PAGE * PAGE_SIZE)
+#define CT_PTES_PER_PAGE (CT_PAGE_SIZE / sizeof(void *))
+#define CT_ADDRS_PER_PAGE (CT_PTES_PER_PAGE * CT_PAGE_SIZE)
 
 /* *
  * Find or create vm block based on requested @size.
@@ -138,24 +137,24 @@ ct_vm_map(struct ct_vm *vm, void *host_addr, int size)
 		return NULL;
 	}
 
-	start_phys = (virt_to_phys(host_addr) & PAGE_MASK);
-	pages = (PAGE_ALIGN(virt_to_phys(host_addr) + size)
-			- start_phys) >> PAGE_SHIFT;
+	start_phys = (virt_to_phys(host_addr) & CT_PAGE_MASK);
+	pages = (CT_PAGE_ALIGN(virt_to_phys(host_addr) + size)
+			- start_phys) >> CT_PAGE_SHIFT;
 
 	ptp = vm->ptp[0];
 
-	block = get_vm_block(vm, (pages << PAGE_SHIFT));
+	block = get_vm_block(vm, (pages << CT_PAGE_SHIFT));
 	if (block == NULL) {
 		printk(KERN_ERR "ctxfi: No virtual memory block that is big "
 				  "enough to allocate!\n");
 		return NULL;
 	}
 
-	pte_start = (block->addr >> PAGE_SHIFT);
+	pte_start = (block->addr >> CT_PAGE_SHIFT);
 	for (i = 0; i < pages; i++)
-		ptp[pte_start+i] = start_phys + (i << PAGE_SHIFT);
+		ptp[pte_start+i] = start_phys + (i << CT_PAGE_SHIFT);
 
-	block->addr += (virt_to_phys(host_addr) & (~PAGE_MASK));
+	block->addr += (virt_to_phys(host_addr) & (~CT_PAGE_MASK));
 	block->size = size;
 
 	return block;
@@ -164,9 +163,9 @@ ct_vm_map(struct ct_vm *vm, void *host_addr, int size)
 static void ct_vm_unmap(struct ct_vm *vm, struct ct_vm_block *block)
 {
 	/* do unmapping */
-	block->size = ((block->addr + block->size + PAGE_SIZE - 1)
-			& PAGE_MASK) - (block->addr & PAGE_MASK);
-	block->addr &= PAGE_MASK;
+	block->size = ((block->addr + block->size + CT_PAGE_SIZE - 1)
+			& CT_PAGE_MASK) - (block->addr & CT_PAGE_MASK);
+	block->addr &= CT_PAGE_MASK;
 	put_vm_block(vm, block);
 }
 

sound/pci/ctxfi/ctvmem.h

@@ -23,6 +23,14 @@
 #include <linux/mutex.h>
 #include <linux/list.h>
 
+/* The chip can handle the page table of 4k pages
+ * (emu20k1 can handle even 8k pages, but we don't use it right now)
+ */
+#define CT_PAGE_SIZE	4096
+#define CT_PAGE_SHIFT	12
+#define CT_PAGE_MASK	(~(PAGE_SIZE - 1))
+#define CT_PAGE_ALIGN(addr)	ALIGN(addr, CT_PAGE_SIZE)
+
 struct ct_vm_block {
 	unsigned int addr;	/* starting logical addr of this block */
 	unsigned int size;	/* size of this device virtual mem block */