Re: [PATCH v2] ibsim: allocate mft according to number of switch ports

["Eli Dorfman (Voltaire)" <dorfman.eli-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

allocate mft according to number of switch ports

calculate number of port masks according to number of switch ports
and allocate MFT accordingly

Signed-off-by: Eli Dorfman <elid-smomgflXvOZWk0Htik3J/w@public.gmane.org>
---
 ibsim/sim.h     |    5 ++---
 ibsim/sim_mad.c |    5 +++--
 ibsim/sim_net.c |    5 +++--
 3 files changed, 8 insertions(+), 7 deletions(-)

diff --git a/ibsim/sim.h b/ibsim/sim.h
index 30f5075..c4ee11f 100644
--- a/ibsim/sim.h
+++ b/ibsim/sim.h
@@ -45,9 +45,7 @@
 #define MAXLINEARCAP	(30*1024)
 #define MAXMCASTCAP	1024
 #define LASTBLOCK32	(MAXMCASTCAP/32-1)
-// NUMBEROFPORTMASK means that 32port switches could only be build
-#define	NUMBEROFPORTMASK 2
-#define LASTPORTMASK	(NUMBEROFPORTMASK-1)
+#define MCASTMASKSIZE    16
 // linkwidth == 4X - must be one width only 1,2 or 8
 #define LINKWIDTH_1x        1
 #define LINKWIDTH_4x        2
@@ -229,6 +227,7 @@ struct Switch {
 	int linearFDBtop;
 	int portchange;
 	int lifetime;
+	int numportmask;
 	uint8_t switchinfo[64];
 	Node *node;
 	uint8_t *fdb;
diff --git a/ibsim/sim_mad.c b/ibsim/sim_mad.c
index 61d4866..3133bcf 100644
--- a/ibsim/sim_mad.c
+++ b/ibsim/sim_mad.c
@@ -513,18 +513,19 @@ static int do_multicastforwtbl(Port * port, unsigned op, uint32_t mod,
 	int blockposition;
 
 	Switch *sw = port->node->sw;
+	int lastportmask = sw->numportmask + 1;
 
 	if (!sw)		// not a Switch?
 		return ERR_ATTR_UNSUPPORTED;
 
 	VERB("requested : Block32 %d PortMask %d", numBlock32, numPortMsk);
-	if (numBlock32 > LASTBLOCK32 || numPortMsk > LASTPORTMASK) {
+	if (numBlock32 > LASTBLOCK32 || numPortMsk > lastportmask) {
 		int8_t zeroblock[64] = { 0 };
 		mad_set_array(data, 0, IB_MULTICAST_FORW_TBL_F, zeroblock);
 		return 0;
 	}
 
-	blockposition = (numBlock32 * NUMBEROFPORTMASK + numPortMsk) * 64;
+	blockposition = (numBlock32 * sw->numportmask + numPortMsk) * 64;
 	if (op == IB_MAD_METHOD_SET)
 		mad_get_array(data, 0, IB_MULTICAST_FORW_TBL_F,
 			      sw->mfdb + blockposition);
diff --git a/ibsim/sim_net.c b/ibsim/sim_net.c
index 13c3b8c..f17f0b9 100644
--- a/ibsim/sim_net.c
+++ b/ibsim/sim_net.c
@@ -245,6 +245,7 @@ static Switch *new_switch(Node * nd, int set_esp0)
 	sw->node = nd;
 	sw->linearcap = maxlinearcap;	// assume identical val for all switches
 	sw->multicastcap = maxmcastcap;	// assume identical val for all switches
+	sw->numportmask = (nd->numports + MCASTMASKSIZE) / MCASTMASKSIZE;
 	memcpy(sw->switchinfo, switchinfo, sizeof(sw->switchinfo));
 	mad_set_field(sw->switchinfo, 0, IB_SW_LINEAR_FDB_CAP_F, sw->linearcap);
 	mad_set_field(sw->switchinfo, 0, IB_SW_MCAST_FDB_CAP_F,
@@ -253,13 +254,13 @@ static Switch *new_switch(Node * nd, int set_esp0)
 		mad_set_field(sw->switchinfo, 0, IB_SW_ENHANCED_PORT0_F,
 			      set_esp0 > 0);
 	sw->fdb = malloc(maxlinearcap*sizeof(sw->fdb[0]));
-	sw->mfdb = malloc(maxmcastcap*NUMBEROFPORTMASK*sizeof(uint16_t));
+	sw->mfdb = malloc(maxmcastcap * sw->numportmask * sizeof(uint16_t));
 	if (!sw->fdb || !sw->mfdb) {
 		IBPANIC("new_switch: no mem: %m");
 		return NULL;
 	}
 	memset(sw->fdb, 0xff, maxlinearcap*sizeof(sw->fdb[0]));
-	memset(sw->mfdb, 0, maxmcastcap*NUMBEROFPORTMASK*sizeof(uint16_t));
+	memset(sw->mfdb, 0, maxmcastcap * sw->numportmask * sizeof(uint16_t));
 
 	return sw;
 }
-- 
1.7.2.1

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