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soc/fsl/qbman: Cleanup buffer pools if BMan was initialized prior to bootup

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Clean the BMan buffer pools if the device had been initialized
previously.  This will ensure a consistent state if the kernel
was soft restarted (kexec for example)

Signed-off-by: Roy Pledge <roy.pledge@nxp.com>
Signed-off-by: Li Yang <leoyang.li@nxp.com>
This commit is contained in:
Roy Pledge
2019-08-01 20:16:55 +00:00
committed by Li Yang
parent 97777078d6
commit 0505d00c8d
4 changed files with 41 additions and 9 deletions
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17
drivers/soc/fsl/qbman/bman.c
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@@ -635,30 +635,31 @@ int bman_p_irqsource_add(struct bman_portal *p, u32 bits)
return 0;
}
static int bm_shutdown_pool(u32 bpid)
int bm_shutdown_pool(u32 bpid)
{
int err = 0;
struct bm_mc_command *bm_cmd;
union bm_mc_result *bm_res;
struct bman_portal *p = get_affine_portal();
while (1) {
struct bman_portal *p = get_affine_portal();
/* Acquire buffers until empty */
bm_cmd = bm_mc_start(&p->p);
bm_cmd->bpid = bpid;
bm_mc_commit(&p->p, BM_MCC_VERB_CMD_ACQUIRE | 1);
if (!bm_mc_result_timeout(&p->p, &bm_res)) {
put_affine_portal();
pr_crit("BMan Acquire Command timedout\n");
return -ETIMEDOUT;
err = -ETIMEDOUT;
goto done;
}
if (!(bm_res->verb & BM_MCR_VERB_ACQUIRE_BUFCOUNT)) {
put_affine_portal();
/* Pool is empty */
return 0;
goto done;
}
put_affine_portal();
}
done:
put_affine_portal();
return 0;
}