diff options
| author | Xie Xiaobo <xiaobo.xie@nxp.com> | 2017-12-12 08:23:55 (GMT) |
|---|---|---|
| committer | Xie Xiaobo <xiaobo.xie@nxp.com> | 2017-12-12 08:23:55 (GMT) |
| commit | 708b8b8eb67124716c8579a9e259742b040d4dd3 (patch) | |
| tree | afc209d3f63c3d79e91a98c8f3ba01465977b574 /drivers/staging/fsl_qbman/qman_low.h | |
| parent | c0246a9ec4d461ef4dd7647f94005380bb9e7f0b (diff) | |
| parent | 5fe8cfe356d2dbf6f9d7e213614d6be9ad0ac592 (diff) | |
| download | linux-708b8b8eb67124716c8579a9e259742b040d4dd3.tar.xz | |
Merge branch 'linux-4.9-nxp' into linux-4.9 on Dec. 8, 2017
Signed-off-by: Xiaobo Xie <xiaobo.xie@nxp.com>
Diffstat (limited to 'drivers/staging/fsl_qbman/qman_low.h')
| -rw-r--r-- | drivers/staging/fsl_qbman/qman_low.h | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/drivers/staging/fsl_qbman/qman_low.h b/drivers/staging/fsl_qbman/qman_low.h index 547b5fa..e43f9ea 100644 --- a/drivers/staging/fsl_qbman/qman_low.h +++ b/drivers/staging/fsl_qbman/qman_low.h @@ -1095,11 +1095,26 @@ static inline void qm_mr_set_ithresh(struct qm_portal *portal, u8 ithresh) static inline int qm_mc_init(struct qm_portal *portal) { + u8 rr0, rr1; register struct qm_mc *mc = &portal->mc; + mc->cr = portal->addr.addr_ce + QM_CL_CR; mc->rr = portal->addr.addr_ce + QM_CL_RR0; - mc->rridx = (__raw_readb(&mc->cr->__dont_write_directly__verb) & - QM_MCC_VERB_VBIT) ? 0 : 1; + + /* + * The expected valid bit polarity for the next CR command is 0 + * if RR1 contains a valid response, and is 1 if RR0 contains a + * valid response. If both RR contain all 0, this indicates either + * that no command has been executed since reset (in which case the + * expected valid bit polarity is 1) + */ + rr0 = __raw_readb(&mc->rr->verb); + rr1 = __raw_readb(&(mc->rr+1)->verb); + if ((rr0 == 0 && rr1 == 0) || rr0 != 0) + mc->rridx = 1; + else + mc->rridx = 0; + mc->vbit = mc->rridx ? QM_MCC_VERB_VBIT : 0; #ifdef CONFIG_FSL_DPA_CHECKING mc->state = qman_mc_idle; |