[dpdk-dev] [PATCH v2 03/16] bus/dpaa: fix the buffer offset setting in FMAN

[Hemant Agrawal]

The buffer offset was incorrectly being set at 64,
thus not honoring the packet headroom.

Fixes: 6d6b4f49a155 (bus/dpaa: add FMAN hardware operations")
Cc: sta...@dpdk.org

Signed-off-by: Hemant Agrawal <hemant.agra...@nxp.com>
---
 drivers/bus/dpaa/base/fman/fman_hw.c | 20 +++++++++++---------
 1 file changed, 11 insertions(+), 9 deletions(-)

diff --git a/drivers/bus/dpaa/base/fman/fman_hw.c 
b/drivers/bus/dpaa/base/fman/fman_hw.c
index 0148b98..7ada7fa 100644
--- a/drivers/bus/dpaa/base/fman/fman_hw.c
+++ b/drivers/bus/dpaa/base/fman/fman_hw.c
@@ -16,6 +16,8 @@
 #include <fsl_fman_crc64.h>
 #include <fsl_bman.h>
 
+#define FMAN_SP_EXT_BUF_MARG_START_SHIFT            16
+
 /* Instantiate the global variable that the inline CRC64 implementation (in
  * <fsl_fman.h>) depends on.
  */
@@ -422,20 +424,16 @@ fman_if_set_fc_quanta(struct fman_if *fm_if, u16 
pause_quanta)
 int
 fman_if_get_fdoff(struct fman_if *fm_if)
 {
-       u32 fmbm_ricp;
+       u32 fmbm_rebm;
        int fdoff;
-       int iceof_mask = 0x001f0000;
-       int icsz_mask = 0x0000001f;
 
        struct __fman_if *__if = container_of(fm_if, struct __fman_if, __if);
 
        assert(fman_ccsr_map_fd != -1);
 
-       fmbm_ricp =
-                  in_be32(&((struct rx_bmi_regs *)__if->bmi_map)->fmbm_ricp);
-       /*iceof + icsz*/
-       fdoff = ((fmbm_ricp & iceof_mask) >> 16) * 16 +
-               (fmbm_ricp & icsz_mask) * 16;
+       fmbm_rebm = in_be32(&((struct rx_bmi_regs *)__if->bmi_map)->fmbm_rebm);
+
+       fdoff = (fmbm_rebm >> FMAN_SP_EXT_BUF_MARG_START_SHIFT) & 0x1ff;
 
        return fdoff;
 }
@@ -502,12 +500,16 @@ fman_if_set_fdoff(struct fman_if *fm_if, uint32_t 
fd_offset)
 {
        struct __fman_if *__if = container_of(fm_if, struct __fman_if, __if);
        unsigned int *fmbm_rebm;
+       int val = 0;
+       int fmbm_mask = 0x01ff0000;
+
+       val = fd_offset << FMAN_SP_EXT_BUF_MARG_START_SHIFT;
 
        assert(fman_ccsr_map_fd != -1);
 
        fmbm_rebm = &((struct rx_bmi_regs *)__if->bmi_map)->fmbm_rebm;
 
-       out_be32(fmbm_rebm, in_be32(fmbm_rebm) | (fd_offset << 16));
+       out_be32(fmbm_rebm, (in_be32(fmbm_rebm) & ~fmbm_mask) | val);
 }
 
 void
-- 
2.7.4