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authorAlexandre Bounine <alexandre.bounine@idt.com>2010-05-27 01:43:59 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2010-05-27 20:12:50 +0400
commite5cabeb3d60f9cd3e3950aff071319ae0e2d08d8 (patch)
treee866f1a9076608630a40f21f0a50c073dedb0e57 /drivers/rapidio/switches
parent818a04a0bb93643d57dd8935815de2ff307b58a3 (diff)
downloadlinux-e5cabeb3d60f9cd3e3950aff071319ae0e2d08d8.tar.xz
rapidio: add Port-Write handling for EM
Add RapidIO Port-Write message handling in the context of Error Management Extensions Specification Rev.1.3. Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com> Tested-by: Thomas Moll <thomas.moll@sysgo.com> Cc: Matt Porter <mporter@kernel.crashing.org> Cc: Li Yang <leoli@freescale.com> Cc: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/rapidio/switches')
-rw-r--r--drivers/rapidio/switches/tsi568.c24
-rw-r--r--drivers/rapidio/switches/tsi57x.c153
2 files changed, 177 insertions, 0 deletions
diff --git a/drivers/rapidio/switches/tsi568.c b/drivers/rapidio/switches/tsi568.c
index bce9112ff0d9..905cf9cb09cc 100644
--- a/drivers/rapidio/switches/tsi568.c
+++ b/drivers/rapidio/switches/tsi568.c
@@ -25,6 +25,9 @@
#define SPP_ROUTE_CFG_DESTID(n) (0x11070 + 0x100*n)
#define SPP_ROUTE_CFG_PORT(n) (0x11074 + 0x100*n)
+#define TSI568_SP_MODE_BC 0x10004
+#define TSI568_SP_MODE_PW_DIS 0x08000000
+
static int
tsi568_route_add_entry(struct rio_mport *mport, u16 destid, u8 hopcount,
u16 table, u16 route_destid, u8 route_port)
@@ -104,3 +107,24 @@ tsi568_route_clr_table(struct rio_mport *mport, u16 destid, u8 hopcount,
}
DECLARE_RIO_ROUTE_OPS(RIO_VID_TUNDRA, RIO_DID_TSI568, tsi568_route_add_entry, tsi568_route_get_entry, tsi568_route_clr_table);
+
+static int
+tsi568_em_init(struct rio_dev *rdev)
+{
+ struct rio_mport *mport = rdev->net->hport;
+ u16 destid = rdev->rswitch->destid;
+ u8 hopcount = rdev->rswitch->hopcount;
+ u32 regval;
+
+ pr_debug("TSI568 %s [%d:%d]\n", __func__, destid, hopcount);
+
+ /* Make sure that Port-Writes are disabled (for all ports) */
+ rio_mport_read_config_32(mport, destid, hopcount,
+ TSI568_SP_MODE_BC, &regval);
+ rio_mport_write_config_32(mport, destid, hopcount,
+ TSI568_SP_MODE_BC, regval | TSI568_SP_MODE_PW_DIS);
+
+ return 0;
+}
+
+DECLARE_RIO_EM_OPS(RIO_VID_TUNDRA, RIO_DID_TSI568, tsi568_em_init, NULL);
diff --git a/drivers/rapidio/switches/tsi57x.c b/drivers/rapidio/switches/tsi57x.c
index 5ad7880787c9..23040b92ea76 100644
--- a/drivers/rapidio/switches/tsi57x.c
+++ b/drivers/rapidio/switches/tsi57x.c
@@ -25,6 +25,14 @@
#define SPP_ROUTE_CFG_DESTID(n) (0x11070 + 0x100*n)
#define SPP_ROUTE_CFG_PORT(n) (0x11074 + 0x100*n)
+#define TSI578_SP_MODE(n) (0x11004 + n*0x100)
+#define TSI578_SP_MODE_PW_DIS 0x08000000
+
+#define TSI578_SP_CTL_INDEP(n) (0x13004 + n*0x100)
+#define TSI578_SP_LUT_PEINF(n) (0x13010 + n*0x100)
+#define TSI578_SP_CS_TX(n) (0x13014 + n*0x100)
+#define TSI578_SP_INT_STATUS(n) (0x13018 + n*0x100)
+
static int
tsi57x_route_add_entry(struct rio_mport *mport, u16 destid, u8 hopcount,
u16 table, u16 route_destid, u8 route_port)
@@ -104,3 +112,148 @@ DECLARE_RIO_ROUTE_OPS(RIO_VID_TUNDRA, RIO_DID_TSI572, tsi57x_route_add_entry, ts
DECLARE_RIO_ROUTE_OPS(RIO_VID_TUNDRA, RIO_DID_TSI574, tsi57x_route_add_entry, tsi57x_route_get_entry, tsi57x_route_clr_table);
DECLARE_RIO_ROUTE_OPS(RIO_VID_TUNDRA, RIO_DID_TSI577, tsi57x_route_add_entry, tsi57x_route_get_entry, tsi57x_route_clr_table);
DECLARE_RIO_ROUTE_OPS(RIO_VID_TUNDRA, RIO_DID_TSI578, tsi57x_route_add_entry, tsi57x_route_get_entry, tsi57x_route_clr_table);
+
+static int
+tsi57x_em_init(struct rio_dev *rdev)
+{
+ struct rio_mport *mport = rdev->net->hport;
+ u16 destid = rdev->rswitch->destid;
+ u8 hopcount = rdev->rswitch->hopcount;
+ u32 regval;
+ int portnum;
+
+ pr_debug("TSI578 %s [%d:%d]\n", __func__, destid, hopcount);
+
+ for (portnum = 0; portnum < 16; portnum++) {
+ /* Make sure that Port-Writes are enabled (for all ports) */
+ rio_mport_read_config_32(mport, destid, hopcount,
+ TSI578_SP_MODE(portnum), &regval);
+ rio_mport_write_config_32(mport, destid, hopcount,
+ TSI578_SP_MODE(portnum),
+ regval & ~TSI578_SP_MODE_PW_DIS);
+
+ /* Clear all pending interrupts */
+ rio_mport_read_config_32(mport, destid, hopcount,
+ rdev->phys_efptr +
+ RIO_PORT_N_ERR_STS_CSR(portnum),
+ &regval);
+ rio_mport_write_config_32(mport, destid, hopcount,
+ rdev->phys_efptr +
+ RIO_PORT_N_ERR_STS_CSR(portnum),
+ regval & 0x07120214);
+
+ rio_mport_read_config_32(mport, destid, hopcount,
+ TSI578_SP_INT_STATUS(portnum), &regval);
+ rio_mport_write_config_32(mport, destid, hopcount,
+ TSI578_SP_INT_STATUS(portnum),
+ regval & 0x000700bd);
+
+ /* Enable all interrupts to allow ports to send a port-write */
+ rio_mport_read_config_32(mport, destid, hopcount,
+ TSI578_SP_CTL_INDEP(portnum), &regval);
+ rio_mport_write_config_32(mport, destid, hopcount,
+ TSI578_SP_CTL_INDEP(portnum),
+ regval | 0x000b0000);
+
+ /* Skip next (odd) port if the current port is in x4 mode */
+ rio_mport_read_config_32(mport, destid, hopcount,
+ rdev->phys_efptr + RIO_PORT_N_CTL_CSR(portnum),
+ &regval);
+ if ((regval & RIO_PORT_N_CTL_PWIDTH) == RIO_PORT_N_CTL_PWIDTH_4)
+ portnum++;
+ }
+
+ return 0;
+}
+
+static int
+tsi57x_em_handler(struct rio_dev *rdev, u8 portnum)
+{
+ struct rio_mport *mport = rdev->net->hport;
+ u16 destid = rdev->rswitch->destid;
+ u8 hopcount = rdev->rswitch->hopcount;
+ u32 intstat, err_status;
+ int sendcount, checkcount;
+ u8 route_port;
+ u32 regval;
+
+ rio_mport_read_config_32(mport, destid, hopcount,
+ rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(portnum),
+ &err_status);
+
+ if ((err_status & RIO_PORT_N_ERR_STS_PORT_OK) &&
+ (err_status & (RIO_PORT_N_ERR_STS_PW_OUT_ES |
+ RIO_PORT_N_ERR_STS_PW_INP_ES))) {
+ /* Remove any queued packets by locking/unlocking port */
+ rio_mport_read_config_32(mport, destid, hopcount,
+ rdev->phys_efptr + RIO_PORT_N_CTL_CSR(portnum),
+ &regval);
+ if (!(regval & RIO_PORT_N_CTL_LOCKOUT)) {
+ rio_mport_write_config_32(mport, destid, hopcount,
+ rdev->phys_efptr + RIO_PORT_N_CTL_CSR(portnum),
+ regval | RIO_PORT_N_CTL_LOCKOUT);
+ udelay(50);
+ rio_mport_write_config_32(mport, destid, hopcount,
+ rdev->phys_efptr + RIO_PORT_N_CTL_CSR(portnum),
+ regval);
+ }
+
+ /* Read from link maintenance response register to clear
+ * valid bit
+ */
+ rio_mport_read_config_32(mport, destid, hopcount,
+ rdev->phys_efptr + RIO_PORT_N_MNT_RSP_CSR(portnum),
+ &regval);
+
+ /* Send a Packet-Not-Accepted/Link-Request-Input-Status control
+ * symbol to recover from IES/OES
+ */
+ sendcount = 3;
+ while (sendcount) {
+ rio_mport_write_config_32(mport, destid, hopcount,
+ TSI578_SP_CS_TX(portnum), 0x40fc8000);
+ checkcount = 3;
+ while (checkcount--) {
+ udelay(50);
+ rio_mport_read_config_32(
+ mport, destid, hopcount,
+ rdev->phys_efptr +
+ RIO_PORT_N_MNT_RSP_CSR(portnum),
+ &regval);
+ if (regval & RIO_PORT_N_MNT_RSP_RVAL)
+ goto exit_es;
+ }
+
+ sendcount--;
+ }
+ }
+
+exit_es:
+ /* Clear implementation specific error status bits */
+ rio_mport_read_config_32(mport, destid, hopcount,
+ TSI578_SP_INT_STATUS(portnum), &intstat);
+ pr_debug("TSI578[%x:%x] SP%d_INT_STATUS=0x%08x\n",
+ destid, hopcount, portnum, intstat);
+
+ if (intstat & 0x10000) {
+ rio_mport_read_config_32(mport, destid, hopcount,
+ TSI578_SP_LUT_PEINF(portnum), &regval);
+ regval = (mport->sys_size) ? (regval >> 16) : (regval >> 24);
+ route_port = rdev->rswitch->route_table[regval];
+ pr_debug("RIO: TSI578[%s] P%d LUT Parity Error (destID=%d)\n",
+ rio_name(rdev), portnum, regval);
+ tsi57x_route_add_entry(mport, destid, hopcount,
+ RIO_GLOBAL_TABLE, regval, route_port);
+ }
+
+ rio_mport_write_config_32(mport, destid, hopcount,
+ TSI578_SP_INT_STATUS(portnum),
+ intstat & 0x000700bd);
+
+ return 0;
+}
+
+DECLARE_RIO_EM_OPS(RIO_VID_TUNDRA, RIO_DID_TSI572, tsi57x_em_init, tsi57x_em_handler);
+DECLARE_RIO_EM_OPS(RIO_VID_TUNDRA, RIO_DID_TSI574, tsi57x_em_init, tsi57x_em_handler);
+DECLARE_RIO_EM_OPS(RIO_VID_TUNDRA, RIO_DID_TSI577, tsi57x_em_init, tsi57x_em_handler);
+DECLARE_RIO_EM_OPS(RIO_VID_TUNDRA, RIO_DID_TSI578, tsi57x_em_init, tsi57x_em_handler);