iop_adma: cleanup iop_chan_xor_slot_count

- use a table for iop13xx, trade text for data
- shrink the iop3xx to a cache line

Signed-off-by: Dan Williams <dan.j.williams@intel.com>

diff --git a/include/asm-arm/arch-iop13xx/adma.h b/include/asm-arm/arch-iop13xx/adma.h
index 90d14ee..ef4f5da 100644 (file)
--- a/include/asm-arm/arch-iop13xx/adma.h
+++ b/include/asm-arm/arch-iop13xx/adma.h
@@ -198,17 +198,13 @@ iop_chan_memset_slot_count(size_t len, int *slots_per_op)
 static inline int
 iop_chan_xor_slot_count(size_t len, int src_cnt, int *slots_per_op)
 {
-       int num_slots;
-       /* slots_to_find = 1 for basic descriptor + 1 per 4 sources above 1
-        * (1 source => 8 bytes) (1 slot => 32 bytes)
-        */
-       num_slots = 1 + (((src_cnt - 1) << 3) >> 5);
-       if (((src_cnt - 1) << 3) & 0x1f)
-               num_slots++;
-
-       *slots_per_op = num_slots;
-
-       return num_slots;
+       static const char slot_count_table[] = { 1, 2, 2, 2,
+                                                2, 3, 3, 3,
+                                                3, 4, 4, 4,
+                                                4, 5, 5, 5,
+                                               };
+       *slots_per_op = slot_count_table[src_cnt - 1];
+       return *slots_per_op;
 }
 
 #define ADMA_MAX_BYTE_COUNT    (16 * 1024 * 1024)

diff --git a/include/asm-arm/hardware/iop3xx-adma.h b/include/asm-arm/hardware/iop3xx-adma.h
index a32b86a..af64676 100644 (file)
--- a/include/asm-arm/hardware/iop3xx-adma.h
+++ b/include/asm-arm/hardware/iop3xx-adma.h
@@ -260,7 +260,7 @@ static inline int iop_chan_memset_slot_count(size_t len, int *slots_per_op)
 static inline int iop3xx_aau_xor_slot_count(size_t len, int src_cnt,
                                        int *slots_per_op)
 {
-       static const int slot_count_table[] = { 0,
+       static const char slot_count_table[] = {
                                                1, 1, 1, 1, /* 01 - 04 */
                                                2, 2, 2, 2, /* 05 - 08 */
                                                4, 4, 4, 4, /* 09 - 12 */
@@ -270,7 +270,7 @@ static inline int iop3xx_aau_xor_slot_count(size_t len, int src_cnt,
                                                8, 8, 8, 8, /* 25 - 28 */
                                                8, 8, 8, 8, /* 29 - 32 */
                                              };
-       *slots_per_op = slot_count_table[src_cnt];
+       *slots_per_op = slot_count_table[src_cnt - 1];
        return *slots_per_op;
 }