Commit fb33d277 authored by Karsten Graul's avatar Karsten Graul Committed by David S. Miller
Browse files

net/smc: map and register buffers for a new link 



Introduce support to map and register all current buffers for a new
link. smcr_buf_map_lgr() will map used buffers for a new link and
smcr_buf_reg_lgr() can be called to register used buffers on the
IB device of the new link.

Signed-off-by: default avatarKarsten Graul <kgraul@linux.ibm.com>
Reviewed-by: default avatarUrsula Braun <ubraun@linux.ibm.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 4a3641c1

net/smc/smc_core.c

+60 −0
Original line number Diff line number Diff line
@@ -1185,6 +1185,66 @@ int smcr_link_reg_rmb(struct smc_link *link, struct smc_buf_desc *rmb_desc) 
	return 0;

}



static int _smcr_buf_map_lgr(struct smc_link *lnk, struct mutex *lock,

			     struct list_head *lst, bool is_rmb)

{

	struct smc_buf_desc *buf_desc, *bf;

	int rc = 0;



	mutex_lock(lock);

	list_for_each_entry_safe(buf_desc, bf, lst, list) {

		if (!buf_desc->used)

			continue;

		rc = smcr_buf_map_link(buf_desc, is_rmb, lnk);

		if (rc)

			goto out;

	}

out:

	mutex_unlock(lock);

	return rc;

}



/* map all used buffers of lgr for a new link */

int smcr_buf_map_lgr(struct smc_link *lnk)

{

	struct smc_link_group *lgr = lnk->lgr;

	int i, rc = 0;



	for (i = 0; i < SMC_RMBE_SIZES; i++) {

		rc = _smcr_buf_map_lgr(lnk, &lgr->rmbs_lock,

				       &lgr->rmbs[i], true);

		if (rc)

			return rc;

		rc = _smcr_buf_map_lgr(lnk, &lgr->sndbufs_lock,

				       &lgr->sndbufs[i], false);

		if (rc)

			return rc;

	}

	return 0;

}



/* register all used buffers of lgr for a new link */

int smcr_buf_reg_lgr(struct smc_link *lnk)

{

	struct smc_link_group *lgr = lnk->lgr;

	struct smc_buf_desc *buf_desc, *bf;

	int i, rc = 0;



	mutex_lock(&lgr->rmbs_lock);

	for (i = 0; i < SMC_RMBE_SIZES; i++) {

		list_for_each_entry_safe(buf_desc, bf, &lgr->rmbs[i], list) {

			if (!buf_desc->used)

				continue;

			rc = smcr_link_reg_rmb(lnk, buf_desc);

			if (rc)

				goto out;

		}

	}

out:

	mutex_unlock(&lgr->rmbs_lock);

	return rc;

}



static struct smc_buf_desc *smcr_new_buf_create(struct smc_link_group *lgr,

						bool is_rmb, int bufsize)

{

net/smc/smc_core.h

+2 −0
Original line number Diff line number Diff line
@@ -368,6 +368,8 @@ int smc_core_init(void); 
void smc_core_exit(void);



void smcr_link_clear(struct smc_link *lnk);

int smcr_buf_map_lgr(struct smc_link *lnk);

int smcr_buf_reg_lgr(struct smc_link *lnk);

int smcr_link_reg_rmb(struct smc_link *link, struct smc_buf_desc *rmb_desc);

static inline struct smc_link_group *smc_get_lgr(struct smc_link *link)

{

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