octeontx2-pf: cn10k/cn20k: Update count_eot in NPA_LF_AURA_BATCH_FREE0

This patch updates the count_eot calculation for CN20K devices.
Where the count_eot feild extended to 2 bits, while maintaining
CN10K compatibility where only bit 0 is used.

Signed-off-by: Geetha sowjanya <gakula@marvell.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20260128022448.4402-1-gakula@marvell.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h
index 8cdfc36d79d29ee9d43b86df205953a8c8c6644e..255c7e2633bbb503b2e91bc3f07c9f548f9e2a46 100644 (file)
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h
@@ -789,8 +789,15 @@ static inline void __cn10k_aura_freeptr(struct otx2_nic *pfvf, u64 aura,
        tar_addr = (__force u64)otx2_get_regaddr(pfvf, NPA_LF_AURA_BATCH_FREE0);
        /* LMTID is same as AURA Id */
        val = (lmt_info->lmt_id & 0x7FF) | BIT_ULL(63);
-       /* Set if [127:64] of last 128bit word has a valid pointer */
-       count_eot = (num_ptrs % 2) ? 0ULL : 1ULL;
+       /* Meaning of count_eot
+        * CN10K: count_eot = 0 if the number of pointers to free is even,
+        *        count_eot = 1 if the number of pointers to free is odd.
+        *
+        * CN20K: count_eot represents the least significant 2 bits of the
+        *        total number of valid pointers to free.
+        *        Example: if 7 pointers are freed (0b111), count_eot = 0b11.
+        */
+       count_eot = (num_ptrs - 1) & 0x3ULL;
        /* Set AURA ID to free pointer */
        ptrs[0] = (count_eot << 32) | (aura & 0xFFFFF);
        /* Target address for LMTST flush tells HW how many 128bit
@@ -800,7 +807,7 @@ static inline void __cn10k_aura_freeptr(struct otx2_nic *pfvf, u64 aura,
         */
        if (num_ptrs > 2) {
                size = (sizeof(u64) * num_ptrs) / 16;
-               if (!count_eot)
+               if (!(count_eot & 1))
                        size++;
                tar_addr |=  ((size - 1) & 0x7) << 4;
        }