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soc: fsl: qbman: Add CGR update function 

[ Upstream commit 914f8b228e ]

This adds a function to update a CGR with new parameters. qman_create_cgr
can almost be used for this (with flags=0), but it's not suitable because
it also registers the callback function. The _safe variant was modeled off
of qman_cgr_delete_safe. However, we handle multiple arguments and a return
value.

Signed-off-by: Sean Anderson <sean.anderson@seco.com>
Acked-by: Camelia Groza <camelia.groza@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Stable-dep-of: fbec4e7fed ("soc: fsl: qbman: Use raw spinlock for cgr_lock")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Sean Anderson 2022-09-02 17:57:35 -04:00 committed by Greg Kroah-Hartman
parent 6e9629518c
commit f248ecc186
2 changed files with 57 additions and 0 deletions
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48
drivers/soc/fsl/qbman/qman.c
View File

@ -2566,6 +2566,54 @@ void qman_delete_cgr_safe(struct qman_cgr *cgr)
}
EXPORT_SYMBOL(qman_delete_cgr_safe);
static int qman_update_cgr(struct qman_cgr *cgr, struct qm_mcc_initcgr *opts)
{
int ret;
unsigned long irqflags;
struct qman_portal *p = qman_cgr_get_affine_portal(cgr);
if (!p)
return -EINVAL;
spin_lock_irqsave(&p->cgr_lock, irqflags);
ret = qm_modify_cgr(cgr, 0, opts);
spin_unlock_irqrestore(&p->cgr_lock, irqflags);
put_affine_portal();
return ret;
}
struct update_cgr_params {
struct qman_cgr *cgr;
struct qm_mcc_initcgr *opts;
int ret;
};
static void qman_update_cgr_smp_call(void *p)
{
struct update_cgr_params *params = p;
params->ret = qman_update_cgr(params->cgr, params->opts);
}
int qman_update_cgr_safe(struct qman_cgr *cgr, struct qm_mcc_initcgr *opts)
{
struct update_cgr_params params = {
.cgr = cgr,
.opts = opts,
};
preempt_disable();
if (qman_cgr_cpus[cgr->cgrid] != smp_processor_id())
smp_call_function_single(qman_cgr_cpus[cgr->cgrid],
qman_update_cgr_smp_call, &params,
true);
else
params.ret = qman_update_cgr(cgr, opts);
preempt_enable();
return params.ret;
}
EXPORT_SYMBOL(qman_update_cgr_safe);
/* Cleanup FQs */
static int _qm_mr_consume_and_match_verb(struct qm_portal *p, int v)

9
include/soc/fsl/qman.h
View File

@ -1159,6 +1159,15 @@ int qman_delete_cgr(struct qman_cgr *cgr);
*/
void qman_delete_cgr_safe(struct qman_cgr *cgr);
/**
* qman_update_cgr_safe - Modifies a congestion group object from any CPU
* @cgr: the 'cgr' object to modify
* @opts: state of the CGR settings
*
* This will select the proper CPU and modify the CGR settings.
*/
int qman_update_cgr_safe(struct qman_cgr *cgr, struct qm_mcc_initcgr *opts);
/**
* qman_query_cgr_congested - Queries CGR's congestion status
* @cgr: the 'cgr' object to query