From: jason <jason@openbsd.org>
Date: Mon, 10 Apr 2000 18:40:47 +0000 (+0000)
Subject: - Add back code from the original aeon driver to handle missed interrupts by
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=f8e2321e969471d9e25ea5d0a07eaceefb582b94;p=openbsd

- Add back code from the original aeon driver to handle missed interrupts by
enabling interrupts when the command queue has more than one entry.
- fix comment on hifn_newsession to reflect reality
- allocate session structure in softc
- compute a random IV when a session is created and try to chain from a
software kept IV for subsequent packets
- add handling of CRD_F_EXPLICIT
---

diff --git a/sys/dev/pci/hifn7751.c b/sys/dev/pci/hifn7751.c
index b34103780f0..74be7d6ba0d 100644
--- a/sys/dev/pci/hifn7751.c
+++ b/sys/dev/pci/hifn7751.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: hifn7751.c,v 1.26 2000/04/05 16:52:22 jason Exp $	*/
+/*	$OpenBSD: hifn7751.c,v 1.27 2000/04/10 18:40:47 jason Exp $	*/
 
 /*
  * Invertex AEON / Hi/fn 7751 driver
@@ -1093,6 +1093,16 @@ hifn_crypto(sc, cmd)
 	dma->cmdr[cmdi].l = cmdlen | HIFN_D_VALID | HIFN_D_LAST |
 	    HIFN_D_MASKDONEIRQ;
 	dma->cmdu++;
+
+	/*
+	 * We don't worry about missing an interrupt (which a "command wait"
+	 * interrupt salvages us from), unless there is more than one command
+	 * in the queue.
+	 */
+	if (dma->cmdu > 1)
+		WRITE_REG_1(sc, HIFN_1_DMA_IER,
+		    HIFN_DMAIER_C_WAIT | HIFN_DMAIER_R_DONE);
+
 	hifnstats.hst_ipackets++;
 
 	for (i = 0; i < cmd->src_npa; i++) {
@@ -1171,13 +1181,22 @@ hifn_intr(arg)
 	    dma->cmdu, dma->srcu, dma->dstu, dma->resu);
 #endif
 
-	if ((dmacsr & HIFN_DMACSR_R_DONE) == 0)
+	if ((dmacsr & (HIFN_DMACSR_R_DONE | HIFN_DMACSR_C_WAIT)) == 0)
 		return (0);
 
 	if (dma->resu > HIFN_D_RES_RSIZE)
 		printf("%s: Internal Error -- ring overflow\n",
 		    sc->sc_dv.dv_xname);
 
+	if ((dmacsr & HIFN_DMACSR_C_WAIT) && (dma->cmdu == 0)) {
+		/*
+		 * If no slots to process and we receive a "waiting on
+		 * command" interrupt, we disable the "waiting on command"
+		 * (by clearing it).
+		 */
+		WRITE_REG_1(sc, HIFN_1_DMA_IER, HIFN_DMAIER_R_DONE);
+	}
+
 	while (dma->resu > 0) {
 		struct hifn_command *cmd;
 		u_int8_t *macbuf = NULL;
@@ -1230,9 +1249,11 @@ hifn_intr(arg)
 	dma->cmdk = i; dma->cmdu = u;
 
 	/*
-	 * Clear "result done" flags in status register.
+	 * Clear "result done" and "command wait" flags in status register.
+	 * If we still have slots to process and we received a "command wait"
+	 * interrupt, this will interupt us again.
 	 */
-	WRITE_REG_1(sc, HIFN_1_DMA_CSR, HIFN_DMACSR_R_DONE);
+	WRITE_REG_1(sc, HIFN_1_DMA_CSR, HIFN_DMACSR_R_DONE|HIFN_DMACSR_C_WAIT);
 	return (1);
 }
 
@@ -1240,8 +1261,6 @@ hifn_intr(arg)
  * Allocate a new 'session' and return an encoded session id.  'sidp'
  * contains our registration id, and should contain an encoded session
  * id on successful allocation.
- * XXX Mac and encrypt keys should be sent to context ram and should
- * XXX maintain some sort of state.
  */
 int
 hifn_newsession(sidp, cri)
@@ -1265,16 +1284,8 @@ hifn_newsession(sidp, cri)
 	if (sc == NULL)
 		return (EINVAL);
 
-	if (sc->sc_sessions == NULL) {
-		sc->sc_sessions = (u_int8_t *)malloc(sc->sc_maxses,
-		    M_DEVBUF, M_NOWAIT);
-		if (sc->sc_sessions == NULL)
-			return (ENOMEM);
-		bzero(sc->sc_sessions, sc->sc_maxses);
-	}
-
 	for (i = 0; i < sc->sc_maxses; i++) {
-		if (sc->sc_sessions[i] == 0)
+		if (sc->sc_sessions[i].hs_flags == 0)
 			break;
 	}
 	if (i == sc->sc_maxses)
@@ -1300,7 +1311,8 @@ hifn_newsession(sidp, cri)
 		return (EINVAL);
 
 	*sidp = HIFN_SID(sc->sc_dv.dv_unit, i);
-	sc->sc_sessions[i] = 1;
+	sc->sc_sessions[i].hs_flags = 1;
+	get_random_bytes(sc->sc_sessions[i].hs_iv, HIFN_IV_LENGTH);
 
 	return (0);
 }
@@ -1323,10 +1335,10 @@ hifn_freesession(sid)
 
 	sc = hifn_cd.cd_devs[card];
 	session = HIFN_SESSION(sid);
-	if (session >= sc->sc_maxses || sc->sc_sessions == NULL)
+	if (session >= sc->sc_maxses)
 		return (EINVAL);
 
-	sc->sc_sessions[session] = 0;
+	sc->sc_sessions[session].hs_flags = 0;
 	return (0);
 }
 
@@ -1387,9 +1399,9 @@ hifn_process(crp)
 			maccrd = crd1;
 			enccrd = NULL;
 			cmd->flags |= HIFN_ENCODE | HIFN_MAC_TRUNC;
-			if (sc->sc_sessions[session] == 1) {
+			if (sc->sc_sessions[session].hs_flags == 1) {
 				cmd->flags |= HIFN_MAC_NEW_KEY;
-				sc->sc_sessions[session] = 2;
+				sc->sc_sessions[session].hs_flags = 2;
 			}
 		}
 		else if (crd1->crd_alg == CRYPTO_DES_CBC ||
@@ -1398,9 +1410,9 @@ hifn_process(crp)
 				cmd->flags |= HIFN_ENCODE;
 			else
 				cmd->flags |= HIFN_DECODE;
-			if (sc->sc_sessions[session] == 1) {
+			if (sc->sc_sessions[session].hs_flags == 1) {
 				cmd->flags |= HIFN_CRYPT_NEW_KEY;
-				sc->sc_sessions[session] = 2;
+				sc->sc_sessions[session].hs_flags = 2;
 			}
 			maccrd = NULL;
 			enccrd = crd1;
@@ -1437,22 +1449,31 @@ hifn_process(crp)
 			goto errout;
 		}
 
-		if (sc->sc_sessions[session] == 1) {
+		if (sc->sc_sessions[session].hs_flags == 1) {
 			cmd->flags |= HIFN_MAC_NEW_KEY | HIFN_CRYPT_NEW_KEY;
-			sc->sc_sessions[session] = 2;
+			sc->sc_sessions[session].hs_flags = 2;
 		}
 	}
 
 	if (enccrd) {
-		if ((enccrd->crd_flags & (CRD_F_ENCRYPT | CRD_F_IV_PRESENT)) ==
-		    CRD_F_ENCRYPT) {
-			get_random_bytes(cmd->iv, HIFN_IV_LENGTH);
-			m_copyback(cmd->src_m, enccrd->crd_inject,
-				   HIFN_IV_LENGTH, cmd->iv);
+		if (enccrd->crd_flags & CRD_F_ENCRYPT) {
+			if (enccrd->crd_flags & CRD_F_IV_EXPLICIT)
+				bcopy(enccrd->crd_iv, cmd->iv, HIFN_IV_LENGTH);
+			else
+				bcopy(sc->sc_sessions[session].hs_iv,
+				    cmd->iv, HIFN_IV_LENGTH);
+
+			if ((enccrd->crd_flags & CRD_F_IV_PRESENT) == 0)
+				m_copyback(cmd->src_m, enccrd->crd_inject,
+				    HIFN_IV_LENGTH, cmd->iv);
+		}
+		else {
+			if (enccrd->crd_flags & CRD_F_IV_EXPLICIT)
+				bcopy(enccrd->crd_iv, cmd->iv, HIFN_IV_LENGTH);
+			else
+				m_copydata(cmd->src_m, enccrd->crd_inject,
+				    HIFN_IV_LENGTH, cmd->iv);
 		}
-		else
-			m_copydata(cmd->src_m, enccrd->crd_inject,
-				   HIFN_IV_LENGTH, cmd->iv);
 
 		if (enccrd->crd_alg == CRYPTO_DES_CBC)
 			cmd->flags |= HIFN_CRYPT_DES;
@@ -1479,6 +1500,7 @@ hifn_process(crp)
 	cmd->dest_ready_callback = hifn_callback;
 	cmd->private_data = (u_long)crp;
 	cmd->session_num = session;
+	cmd->softc = sc;
 
 	if (hifn_crypto(sc, cmd) == 0)
 		return (0);
@@ -1509,6 +1531,19 @@ hifn_callback(cmd, macbuf)
 		crp->crp_buf = (caddr_t)cmd->dst_m;
 	}
 
+	if ((cmd->flags & HIFN_ENCODE) &&
+	    ((cmd->flags & HIFN_CRYPT_DES) || (cmd->flags & HIFN_CRYPT_3DES))) {
+		for (crd = crp->crp_desc; crd; crd = crd->crd_next) {
+			if (crd->crd_alg != CRYPTO_DES_CBC &&
+			    crd->crd_alg != CRYPTO_3DES_CBC)
+				continue;
+			m_copydata((struct mbuf *)crp->crp_buf,
+			    crd->crd_skip + crd->crd_len - 8, 8,
+			    cmd->softc->sc_sessions[cmd->session_num].hs_iv);
+			break;
+		}
+	}
+
 	if (macbuf != NULL) {
 		for (crd = crp->crp_desc; crd; crd = crd->crd_next) {
 			if (crd->crd_alg != CRYPTO_MD5_HMAC96 &&
diff --git a/sys/dev/pci/hifn7751reg.h b/sys/dev/pci/hifn7751reg.h
index 6bb8a161039..7726a040b89 100644
--- a/sys/dev/pci/hifn7751reg.h
+++ b/sys/dev/pci/hifn7751reg.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: hifn7751reg.h,v 1.12 2000/04/05 16:34:07 jason Exp $	*/
+/*	$OpenBSD: hifn7751reg.h,v 1.13 2000/04/10 18:40:47 jason Exp $	*/
 
 /*
  * Invertex AEON / Hi/fn 7751 driver
@@ -119,6 +119,11 @@ struct hifn_dma {
 	int		cmdk, srck, dstk, resk;
 };
 
+struct hifn_session {
+	int hs_flags;
+	u_int8_t hs_iv[HIFN_IV_LENGTH];
+};
+
 /*
  * Holds data specific to a single HIFN board.
  */
@@ -135,7 +140,7 @@ struct hifn_softc {
 	int32_t sc_cid;
 	int sc_maxses;
 	int sc_ramsize;
-	u_int8_t *sc_sessions;
+	struct hifn_session sc_sessions[2048];
 };
 
 /*
diff --git a/sys/dev/pci/hifn7751var.h b/sys/dev/pci/hifn7751var.h
index 0518e74020f..3619968c4d6 100644
--- a/sys/dev/pci/hifn7751var.h
+++ b/sys/dev/pci/hifn7751var.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: hifn7751var.h,v 1.10 2000/04/04 20:16:33 jason Exp $	*/
+/*	$OpenBSD: hifn7751var.h,v 1.11 2000/04/10 18:40:47 jason Exp $	*/
 
 /*
  * Invertex AEON / Hi/fn 7751 driver
@@ -201,6 +201,7 @@ typedef struct hifn_command {
 
 	void (*dest_ready_callback)(struct hifn_command *, u_int8_t *);
 	u_long private_data;
+	struct hifn_softc *softc;
 } hifn_command_t;
 
 /*