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SubjectRe: [Pcihpd-discuss] Re:[BUG] cpci patch for kernel 2.4.19 bug
On Wed, 8 Jan 2003, Rusty Lynch wrote:

> Just realized that the data I attached was for a 2.5.54
> kernel with my patch to register both cpci buses. Here
> is the same output for a normal 2.5.54 kernel.

Could you try the included patch against the ZT5550 driver out and let
me know if it works better for you? I dug through the host controller
docs that Performance Tech provided me, so now the driver only registers
the appropiate cPCI buses that are active. I think this suffices for
now, but things will become more complicated if/when someone wants to
expand the driver to do redundant system slot stuff.

Note that the patch is also available from:

ftp://oss.somanetworks.com/pub/linux/cpci/v2.5/linux-2.5.55-cpcihp_zt5550-1.patch

and while it's against 2.5.55, should also apply cleanly against 2.5.54
and probably against the 2.4.19 patch I released on pcihpd-discuss a
while back.

Scott


diff -Nur --exclude=RCS --exclude=CVS --exclude=SCCS --exclude=BitKeeper --exclude=ChangeSet linux-2.5/drivers/hotplug/cpcihp_zt5550.c linux-2.5-dev/drivers/hotplug/cpcihp_zt5550.c
--- linux-2.5/drivers/hotplug/cpcihp_zt5550.c Thu Jan 9 13:45:31 2003
+++ linux-2.5-dev/drivers/hotplug/cpcihp_zt5550.c Thu Jan 9 22:53:52 2003
@@ -38,7 +38,7 @@
#include "cpci_hotplug.h"
#include "cpcihp_zt5550.h"

-#define DRIVER_VERSION "0.2"
+#define DRIVER_VERSION "0.3"
#define DRIVER_AUTHOR "Scott Murray <scottm@somanetworks.com>"
#define DRIVER_DESC "ZT5550 CompactPCI Hot Plug Driver"

@@ -64,9 +64,11 @@
static struct cpci_hp_controller_ops zt5550_hpc_ops;
static struct cpci_hp_controller zt5550_hpc;

-/* Primary cPCI bus bridge device */
-static struct pci_dev *bus0_dev;
-static struct pci_bus *bus0;
+/* cPCI bus bridge devices */
+static struct pci_dev *bus1_dev;
+static struct pci_bus *bus1;
+static struct pci_dev *bus2_dev;
+static struct pci_bus *bus2;

/* Host controller device */
static struct pci_dev *hc_dev;
@@ -75,9 +77,11 @@
static void *hc_registers;
static void *csr_hc_index;
static void *csr_hc_data;
-static void *csr_int_status;
-static void *csr_int_mask;
+static void *csr_intstat;
+static void *csr_intmask;

+/* Host controller status register */
+static u32 hcf_hcs;

static int zt5550_hc_config(struct pci_dev *pdev)
{
@@ -109,23 +113,28 @@

csr_hc_index = hc_registers + CSR_HCINDEX;
csr_hc_data = hc_registers + CSR_HCDATA;
- csr_int_status = hc_registers + CSR_INTSTAT;
- csr_int_mask = hc_registers + CSR_INTMASK;
+ csr_intstat = hc_registers + CSR_INTSTAT;
+ csr_intmask = hc_registers + CSR_INTMASK;
+
+ /* Read Host Control Status register */
+ writeb((u8) HCF_HCS, csr_hc_index);
+ hcf_hcs = readl(csr_hc_data);
+ info("HCF_HCS = 0x%08x", hcf_hcs);

/*
* Disable host control, fault and serial interrupts
*/
dbg("disabling host control, fault and serial interrupts");
- writeb((u8) HC_INT_MASK_REG, csr_hc_index);
- writeb((u8) ALL_INDEXED_INTS_MASK, csr_hc_data);
+ writeb((u8) HCF_HCI, csr_hc_index);
+ writeb((u8) HCI_ALL_INTS_MASK, csr_hc_data);
dbg("disabled host control, fault and serial interrupts");

/*
- * Disable timer0, timer1 and ENUM interrupts
+ * Disable timer0, timer1 and ENUM# interrupts
*/
- dbg("disabling timer0, timer1 and ENUM interrupts");
- writeb((u8) ALL_DIRECT_INTS_MASK, csr_int_mask);
- dbg("disabled timer0, timer1 and ENUM interrupts");
+ dbg("disabling timer0, timer1 and ENUM# interrupts");
+ writeb((u8) INTMASK_ALL_INTS_MASK, csr_intmask);
+ dbg("disabled timer0, timer1 and ENUM# interrupts");
return 0;
}

@@ -153,7 +162,7 @@

ret = 0;
if(dev_id == zt5550_hpc.dev_id) {
- reg = readb(csr_int_status);
+ reg = readb(csr_intstat);
if(reg)
ret = 1;
}
@@ -167,9 +176,9 @@
if(hc_dev == NULL) {
return -ENODEV;
}
- reg = readb(csr_int_mask);
- reg = reg & ~ENUM_INT_MASK;
- writeb(reg, csr_int_mask);
+ reg = readb(csr_intmask);
+ reg = reg & ~INTMASK_ENUM_INT_MASK;
+ writeb(reg, csr_intmask);
return 0;
}

@@ -181,16 +190,42 @@
return -ENODEV;
}

- reg = readb(csr_int_mask);
- reg = reg | ENUM_INT_MASK;
- writeb(reg, csr_int_mask);
+ reg = readb(csr_intmask);
+ reg = reg | INTMASK_ENUM_INT_MASK;
+ writeb(reg, csr_intmask);
return 0;
}

+static int __devinit zt5550_register_bus(unsigned int slot,
+ struct pci_dev **dev,
+ struct pci_bus **bus)
+{
+ int status;
+
+ /* Look for slot's device */
+ if(!(*dev = pci_find_slot(0, PCI_DEVFN(slot, 0)))) {
+ return -ENODEV;
+ }
+ if(!((*dev)->vendor == PCI_VENDOR_ID_DEC && \
+ (*dev)->device == PCI_DEVICE_ID_DEC_21154)) {
+ return -ENODEV;
+ }
+ *bus = (*dev)->subordinate;
+
+ status = cpci_hp_register_bus(*bus, 0x0a, 0x0f);
+ if(status) {
+ err("could not register cPCI hotplug bus %d", (*bus)->number);
+ } else {
+ dbg("registered bus %d", (*bus)->number);
+ }
+ return status;
+}
+
static int __devinit zt5550_hc_init_one (struct pci_dev *pdev,
const struct pci_device_id *ent)
{
int status;
+ struct resource* r;

status = zt5550_hc_config(pdev);
if(status != 0) {
@@ -198,6 +233,10 @@
}
dbg("returned from zt5550_hc_config");

+ r = request_region(ENUM_PORT, 1, "ENUM# hotswap signal register");
+ if(!r)
+ return -EBUSY;
+
memset(&zt5550_hpc, 0, sizeof (struct cpci_hp_controller));
zt5550_hpc_ops.query_enum = zt5550_hc_query_enum;
zt5550_hpc.ops = &zt5550_hpc_ops;
@@ -220,31 +259,30 @@
}
dbg("registered controller");

- /* Look for first device matching cPCI bus's bridge vendor and device IDs */
- if(!(bus0_dev = pci_find_device(PCI_VENDOR_ID_DEC,
- PCI_DEVICE_ID_DEC_21154, NULL))) {
- status = -ENODEV;
- goto init_register_error;
- }
- bus0 = bus0_dev->subordinate;
-
- status = cpci_hp_register_bus(bus0, 0x0a, 0x0f);
- if(status != 0) {
- err("could not register cPCI hotplug bus");
- goto init_register_error;
+ if(hcf_hcs & HCS_BUS1_ACTIVE) {
+ status = zt5550_register_bus(BUS1_SLOT, &bus1_dev, &bus1);
+ if(status)
+ goto init_register_error;
+ }
+ if(hcf_hcs & HCS_BUS2_ACTIVE) {
+ status = zt5550_register_bus(BUS2_SLOT, &bus2_dev, &bus2);
+ if(status)
+ goto init_register_error;
}
- dbg("registered bus");

status = cpci_hp_start();
if(status != 0) {
err("could not started cPCI hotplug system");
- cpci_hp_unregister_bus(bus0);
goto init_register_error;
}
- dbg("started cpci hp system");
+ dbg("started cPCI hotplug system");

return 0;
init_register_error:
+ if(bus1)
+ cpci_hp_unregister_bus(bus1);
+ if(bus2)
+ cpci_hp_unregister_bus(bus2);
cpci_hp_unregister_controller(&zt5550_hpc);
init_hc_error:
err("status = %d", status);
@@ -256,7 +294,10 @@
static void __devexit zt5550_hc_remove_one(struct pci_dev *pdev)
{
cpci_hp_stop();
- cpci_hp_unregister_bus(bus0);
+ if(bus1)
+ cpci_hp_unregister_bus(bus1);
+ if(bus2)
+ cpci_hp_unregister_bus(bus2);
cpci_hp_unregister_controller(&zt5550_hpc);
zt5550_hc_cleanup();
}
@@ -277,13 +318,7 @@

static int __init zt5550_init(void)
{
- struct resource* r;
-
info(DRIVER_DESC " version: " DRIVER_VERSION);
- r = request_region(ENUM_PORT, 1, "#ENUM hotswap signal register");
- if(!r)
- return -EBUSY;
-
return pci_module_init(&zt5550_hc_driver);
}

@@ -303,4 +338,4 @@
MODULE_PARM(debug, "i");
MODULE_PARM_DESC(debug, "Debugging mode enabled or not");
MODULE_PARM(poll, "i");
-MODULE_PARM_DESC(poll, "#ENUM polling mode enabled or not");
+MODULE_PARM_DESC(poll, "ENUM# polling mode enabled or not");
diff -Nur --exclude=RCS --exclude=CVS --exclude=SCCS --exclude=BitKeeper --exclude=ChangeSet linux-2.5/drivers/hotplug/cpcihp_zt5550.h linux-2.5-dev/drivers/hotplug/cpcihp_zt5550.h
--- linux-2.5/drivers/hotplug/cpcihp_zt5550.h Thu Jan 9 13:45:31 2003
+++ linux-2.5-dev/drivers/hotplug/cpcihp_zt5550.h Fri Jan 10 16:11:24 2003
@@ -38,38 +38,55 @@
#define CSR_HCDATA 0x04
#define CSR_INTSTAT 0x08
#define CSR_INTMASK 0x09
-#define CSR_CNT0CMD 0x0C
-#define CSR_CNT1CMD 0x0E
-#define CSR_CNT0 0x10
-#define CSR_CNT1 0x14
+#define CSR_ENET 0x0A
+#define CSR_T0_C 0x0C
+#define CSR_T1_C 0x0E
+#define CSR_TIM0 0x10
+#define CSR_TIM1 0x14

/* Masks for interrupt bits in CSR_INTMASK direct register */
-#define CNT0_INT_MASK 0x01
-#define CNT1_INT_MASK 0x02
-#define ENUM_INT_MASK 0x04
-#define ALL_DIRECT_INTS_MASK 0x07
+#define INTMASK_TIM0_INT_MASK 0x01
+#define INTMASK_TIM1_INT_MASK 0x02
+#define INTMASK_ENUM_INT_MASK 0x04
+#define INTMASK_ALL_INTS_MASK 0x07

-/* Indexed registers (through CSR_INDEX, CSR_DATA) */
-#define HC_INT_MASK_REG 0x04
-#define HC_STATUS_REG 0x08
-#define HC_CMD_REG 0x0C
-#define ARB_CONFIG_GNT_REG 0x10
-#define ARB_CONFIG_CFG_REG 0x12
-#define ARB_CONFIG_REG 0x10
-#define ISOL_CONFIG_REG 0x18
-#define FAULT_STATUS_REG 0x20
-#define FAULT_CONFIG_REG 0x24
-#define WD_CONFIG_REG 0x2C
-#define HC_DIAG_REG 0x30
-#define SERIAL_COMM_REG 0x34
-#define SERIAL_OUT_REG 0x38
-#define SERIAL_IN_REG 0x3C
+/* Indexed registers (through CSR_HCINDEX, CSR_HCDATA) */
+#define HCF_HCI 0x04
+#define HCF_HCS 0x08
+#define HCF_HCC 0x0C
+#define HCF_ARBC 0x10
+#define HCF_ISOC 0x18
+#define HCF_FLTS 0x20
+#define HCF_FLTC 0x24
+#define HCF_PMCC 0x28
+#define HCF_WDC 0x2C
+#define HCF_DIAG 0x30
+#define HCF_SERC 0x34
+#define HCF_SDO 0x38
+#define HCF_SDI 0x3C

-/* Masks for interrupt bits in HC_INT_MASK_REG indexed register */
-#define SERIAL_INT_MASK 0x01
-#define FAULT_INT_MASK 0x02
-#define HCF_INT_MASK 0x04
-#define ALL_INDEXED_INTS_MASK 0x07
+/* Masks for interrupt bits in HCF_HCI indexed register */
+#define HCI_SERIAL_INT_MASK 0x01
+#define HCI_FAULT_INT_MASK 0x02
+#define HCI_HCF_INT_MASK 0x04
+#define HCI_ALL_INTS_MASK 0x07
+
+/* Masks for the bits in the HCF_HCS indexed register */
+#define HCS_HA 0x00000001
+#define HCS_ACTIVE 0x00000002
+#define HCS_RH_STATE 0x00000004
+#define HCS_HARD_RESET 0x00000008
+#define HCS_SOFT_RESET 0x00000010
+#define HCS_RH_ALIVE 0x00000020
+#define HCS_SWITCH_OVER 0x00000040
+#define HCS_TAKEOVER_TYPE 0x00000080
+#define HCS_BUS1_ACTIVE 0x00000100
+#define HCS_BUS2_ACTIVE 0x00000200
+#define HCS_SPLIT_MODE_ERROR 0x00000400
+
+/* CompactPCI bus segment device slot numbers */
+#define BUS1_SLOT 0x08
+#define BUS2_SLOT 0x0C

/* Digital I/O port storing ENUM# */
#define ENUM_PORT 0xE1

--
Scott Murray
SOMA Networks, Inc.
Toronto, Ontario
e-mail: scottm@somanetworks.com



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