Re: [PATCH] PCI and PCI Hotplug update for 2.6.6-rc1

From: Greg KH
Date: Thu Apr 15 2004 - 12:32:24 EST

ChangeSet 1.1692.3.3, 2004/03/26 16:31:44-08:00, dlsy@xxxxxxxxxxxxxxxxxxxxxxx

[PATCH] PCI: Updates for PCI Express hot-plug driver


drivers/pci/hotplug/pciehp_hpc.c | 91 +++++++++++++++++++++++++++-------
drivers/pci/hotplug/pciehp_pci.c | 2
drivers/pci/hotplug/shpchp_hpc.c | 11 +---
drivers/pci/hotplug/shpchprm_acpi.c | 3 -
drivers/pci/hotplug/shpchprm_legacy.c | 30 -----------
drivers/pci/pci.h | 2
drivers/pci/quirks.c | 11 ++++
include/linux/pci_ids.h | 1
8 files changed, 95 insertions(+), 56 deletions(-)


diff -Nru a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c
--- a/drivers/pci/hotplug/pciehp_hpc.c Thu Apr 15 10:06:13 2004
+++ b/drivers/pci/hotplug/pciehp_hpc.c Thu Apr 15 10:06:13 2004
@@ -37,6 +37,7 @@
#include <linux/spinlock.h>
#include <linux/pci.h>
#include <asm/system.h>
+#include "../pci.h"
#include "pciehp.h"

#ifdef DEBUG
@@ -315,12 +316,13 @@
dbg("%s : CMD_COMPLETED not clear after 1 sec.\n", __FUNCTION__);
}

- retval = hp_register_write_word(php_ctlr->pci_dev, SLOT_CTRL, cmd);
+ dbg("%s: Before hp_register_write_word SLOT_CTRL %x\n", __FUNCTION__, cmd);
+ retval = hp_register_write_word(php_ctlr->pci_dev, SLOT_CTRL, cmd | CMD_CMPL_INTR_ENABLE);
if (retval) {
err("%s : hp_register_write_word SLOT_CTRL failed\n", __FUNCTION__);
return retval;
}
- dbg("%s : hp_register_write_word SLOT_CTRL %x\n", __FUNCTION__, cmd);
+ dbg("%s : hp_register_write_word SLOT_CTRL %x\n", __FUNCTION__, cmd | CMD_CMPL_INTR_ENABLE);
dbg("%s : Exit\n", __FUNCTION__);

DBG_LEAVE_ROUTINE
@@ -918,13 +920,32 @@
return IRQ_NONE;;
}

- temp_word = (temp_word & ~HP_INTR_ENABLE) | 0x00;
+ dbg("%s: Set Mask Hot-plug Interrupt Enable\n", __FUNCTION__);
+ dbg("%s: hp_register_read_word SLOT_CTRL with value %x\n", __FUNCTION__, temp_word);
+ temp_word = (temp_word & ~HP_INTR_ENABLE & ~CMD_CMPL_INTR_ENABLE) | 0x00;

rc = hp_register_write_word(php_ctlr->pci_dev, SLOT_CTRL, temp_word);
if (rc) {
err("%s : hp_register_write_word SLOT_CTRL failed\n", __FUNCTION__);
- return IRQ_NONE;;
+ return IRQ_NONE;
+ }
+ dbg("%s: hp_register_write_word SLOT_CTRL with value %x\n", __FUNCTION__, temp_word);
+
+ rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS, slot_status);
+ if (rc) {
+ err("%s : hp_register_read_word SLOT_STATUS failed\n", __FUNCTION__);
+ return IRQ_NONE;
+ }
+ dbg("%s: hp_register_read_word SLOT_STATUS with value %x\n", __FUNCTION__, slot_status);
+
+ /* Clear command complete interrupt caused by this write */
+ temp_word = 0x1f;
+ rc = hp_register_write_word(php_ctlr->pci_dev, SLOT_STATUS, temp_word);
+ if (rc) {
+ err("%s : hp_register_write_word SLOT_STATUS failed\n", __FUNCTION__);
+ return IRQ_NONE;
}
+ dbg("%s: hp_register_write_word SLOT_STATUS with value %x\n", __FUNCTION__, temp_word);
}

if (intr_loc & CMD_COMPLETED) {
@@ -949,7 +970,7 @@
hp_slot, php_ctlr->callback_instance_id);

/* Clear all events after serving them */
- temp_word = slot_status | 0xff;
+ temp_word = 0x1F;
rc = hp_register_write_word(php_ctlr->pci_dev, SLOT_STATUS, temp_word);
if (rc) {
err("%s : hp_register_write_word SLOT_STATUS failed\n", __FUNCTION__);
@@ -963,6 +984,8 @@
return IRQ_NONE;
}

+ dbg("%s: Unmask Hot-plug Interrupt Enable\n", __FUNCTION__);
+ dbg("%s: hp_register_read_word SLOT_CTRL with value %x\n", __FUNCTION__, temp_word);
temp_word = (temp_word & ~HP_INTR_ENABLE) | HP_INTR_ENABLE;

rc = hp_register_write_word(php_ctlr->pci_dev, SLOT_CTRL, temp_word);
@@ -970,6 +993,23 @@
err("%s : hp_register_write_word SLOT_CTRL failed\n", __FUNCTION__);
return IRQ_NONE;
}
+ dbg("%s: hp_register_write_word SLOT_CTRL with value %x\n", __FUNCTION__, temp_word);
+
+ rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS, slot_status);
+ if (rc) {
+ err("%s : hp_register_read_word SLOT_STATUS failed\n", __FUNCTION__);
+ return IRQ_NONE;
+ }
+ dbg("%s: hp_register_read_word SLOT_STATUS with value %x\n", __FUNCTION__, slot_status);
+
+ /* Clear command complete interrupt caused by this write */
+ temp_word = 0x1F;
+ rc = hp_register_write_word(php_ctlr->pci_dev, SLOT_STATUS, temp_word);
+ if (rc) {
+ err("%s : hp_register_write_word SLOT_STATUS failed\n", __FUNCTION__);
+ return IRQ_NONE;
+ }
+ dbg("%s: hp_register_write_word SLOT_STATUS with value %x\n", __FUNCTION__, temp_word);
}

return IRQ_HANDLED;
@@ -1330,7 +1370,7 @@
}

dbg("%s: SLOT_CTRL %x value read %x\n", __FUNCTION__, SLOT_CTRL, temp_word);
- temp_word = (temp_word & ~HP_INTR_ENABLE) | 0x00;
+ temp_word = (temp_word & ~HP_INTR_ENABLE & ~CMD_CMPL_INTR_ENABLE) | 0x00;

rc = hp_register_write_word(pdev, SLOT_CTRL, temp_word);
if (rc) {
@@ -1346,12 +1386,13 @@
}
dbg("%s: Mask HPIE SLOT_STATUS offset %x reads slot_status %x\n", __FUNCTION__, SLOT_STATUS, slot_status);

- rc = hp_register_write_word(php_ctlr->pci_dev, SLOT_STATUS, slot_status);
+ temp_word = 0x1F; /* Clear all events */
+ rc = hp_register_write_word(php_ctlr->pci_dev, SLOT_STATUS, temp_word);
if (rc) {
err("%s : hp_register_write_word SLOT_STATUS failed\n", __FUNCTION__);
goto abort_free_ctlr;
}
- dbg("%s: SLOT_STATUS offset %x writes slot_status %x\n", __FUNCTION__, SLOT_STATUS, slot_status);
+ dbg("%s: SLOT_STATUS offset %x writes slot_status %x\n", __FUNCTION__, SLOT_STATUS, temp_word);

if (pciehp_poll_mode) {/* Install interrupt polling code */
/* Install and start the interrupt polling timer */
@@ -1359,15 +1400,16 @@
start_int_poll_timer( php_ctlr, 10 ); /* start with 10 second delay */
} else {
/* Installs the interrupt handler */
-#ifdef CONFIG_PCI_USE_VECTOR
- rc = pci_enable_msi(pdev);
- if (rc) {
- err("Can't get msi for the hotplug controller\n");
- dbg("%s: rc = %x\n", __FUNCTION__, rc);
- goto abort_free_ctlr;
+ dbg("%s: pciehp_msi_quirk = %x\n", __FUNCTION__, pciehp_msi_quirk);
+ if (!pciehp_msi_quirk) {
+ rc = pci_enable_msi(pdev);
+ if (rc) {
+ info("Can't get msi for the hotplug controller\n");
+ info("Use INTx for the hotplug controller\n");
+ dbg("%s: rc = %x\n", __FUNCTION__, rc);
+ } else
+ php_ctlr->irq = pdev->irq;
}
- php_ctlr->irq = pdev->irq;
-#endif
rc = request_irq(php_ctlr->irq, pcie_isr, SA_SHIRQ, MY_NAME, (void *) ctrl);
dbg("%s: request_irq %d for hpc%d (returns %d)\n", __FUNCTION__, php_ctlr->irq, ctlr_seq_num, rc);
if (rc) {
@@ -1384,7 +1426,7 @@
dbg("%s: SLOT_CTRL %x value read %x\n", __FUNCTION__, SLOT_CTRL, temp_word);

intr_enable = ATTN_BUTTN_ENABLE | PWR_FAULT_DETECT_ENABLE | MRL_DETECT_ENABLE |
- PRSN_DETECT_ENABLE | CMD_CMPL_INTR_ENABLE;
+ PRSN_DETECT_ENABLE;

temp_word = (temp_word & ~intr_enable) | intr_enable;

@@ -1402,6 +1444,21 @@
goto abort_free_ctlr;
}
dbg("%s : Unmask HPIE hp_register_write_word SLOT_CTRL with %x\n", __FUNCTION__, temp_word);
+ rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS, slot_status);
+ if (rc) {
+ err("%s : hp_register_read_word SLOT_STATUS failed\n", __FUNCTION__);
+ goto abort_free_ctlr;
+ }
+ dbg("%s: Unmask HPIE SLOT_STATUS offset %x reads slot_status %x\n", __FUNCTION__,
+ SLOT_STATUS, slot_status);
+
+ temp_word = 0x1F; /* Clear all events */
+ rc = hp_register_write_word(php_ctlr->pci_dev, SLOT_STATUS, temp_word);
+ if (rc) {
+ err("%s : hp_register_write_word SLOT_STATUS failed\n", __FUNCTION__);
+ goto abort_free_ctlr;
+ }
+ dbg("%s: SLOT_STATUS offset %x writes slot_status %x\n", __FUNCTION__, SLOT_STATUS, temp_word);

/* Add this HPC instance into the HPC list */
spin_lock(&list_lock);
diff -Nru a/drivers/pci/hotplug/pciehp_pci.c b/drivers/pci/hotplug/pciehp_pci.c
--- a/drivers/pci/hotplug/pciehp_pci.c Thu Apr 15 10:06:13 2004
+++ b/drivers/pci/hotplug/pciehp_pci.c Thu Apr 15 10:06:13 2004
@@ -192,7 +192,6 @@
for (device = FirstSupported; device <= LastSupported; device++) {
ID = 0xFFFFFFFF;
rc = pci_bus_read_config_dword(pci_bus, PCI_DEVFN(device, 0), PCI_VENDOR_ID, &ID);
- dbg("%s: ID = %x\n", __FUNCTION__, ID);

if (ID != 0xFFFFFFFF) { /* device in slot */
dbg("%s: ID = %x\n", __FUNCTION__, ID);
@@ -325,7 +324,6 @@
new_slot->presence_save = 0;
new_slot->switch_save = 0;
}
- dbg("%s: End of For loop\n", __FUNCTION__);
} /* End of FOR loop */

dbg("%s: Exit\n", __FUNCTION__);
diff -Nru a/drivers/pci/hotplug/shpchp_hpc.c b/drivers/pci/hotplug/shpchp_hpc.c
--- a/drivers/pci/hotplug/shpchp_hpc.c Thu Apr 15 10:06:13 2004
+++ b/drivers/pci/hotplug/shpchp_hpc.c Thu Apr 15 10:06:13 2004
@@ -1441,6 +1441,7 @@
err("%s : shpc_cap_offset == 0\n", __FUNCTION__);
goto abort_free_ctlr;
}
+ dbg("%s: shpc_cap_offset = %x\n", __FUNCTION__, shpc_cap_offset);

rc = pci_write_config_byte(pdev, (u8)shpc_cap_offset + DWORD_SELECT , BASE_OFFSET);
if (rc) {
@@ -1547,15 +1548,13 @@
start_int_poll_timer( php_ctlr, 10 ); /* start with 10 second delay */
} else {
/* Installs the interrupt handler */
-#ifdef CONFIG_PCI_USE_VECTOR
rc = pci_enable_msi(pdev);
if (rc) {
- err("Can't get msi for the hotplug controller\n");
+ info("Can't get msi for the hotplug controller\n");
+ info("Use INTx for the hotplug controller\n");
dbg("%s: rc = %x\n", __FUNCTION__, rc);
- goto abort_free_ctlr;
- }
- php_ctlr->irq = pdev->irq;
-#endif
+ } else
+ php_ctlr->irq = pdev->irq;

rc = request_irq(php_ctlr->irq, shpc_isr, SA_SHIRQ, MY_NAME, (void *) ctrl);
dbg("%s: request_irq %d for hpc%d (returns %d)\n", __FUNCTION__, php_ctlr->irq, ctlr_seq_num, rc);
diff -Nru a/drivers/pci/hotplug/shpchprm_acpi.c b/drivers/pci/hotplug/shpchprm_acpi.c
--- a/drivers/pci/hotplug/shpchprm_acpi.c Thu Apr 15 10:06:13 2004
+++ b/drivers/pci/hotplug/shpchprm_acpi.c Thu Apr 15 10:06:13 2004
@@ -1267,7 +1267,8 @@
int shpchprm_print_pirt(void)
{
dbg("SHPCHPRM ACPI Slots\n");
- print_acpi_resources (acpi_bridges_head);
+ if (acpi_bridges_head)
+ print_acpi_resources (acpi_bridges_head);
return 0;
}

diff -Nru a/drivers/pci/hotplug/shpchprm_legacy.c b/drivers/pci/hotplug/shpchprm_legacy.c
--- a/drivers/pci/hotplug/shpchprm_legacy.c Thu Apr 15 10:06:13 2004
+++ b/drivers/pci/hotplug/shpchprm_legacy.c Thu Apr 15 10:06:13 2004
@@ -96,23 +96,6 @@
return fp;
}

-#if link_available
-/*
- * Links available memory, IO, and IRQ resources for programming
- * devices which may be added to the system
- *
- * Returns 0 if success
- */
-static int
-link_available_resources (
- struct controller *ctrl,
- struct pci_func *func,
- int index )
-{
- return shpchp_save_used_resources (ctrl, func, !DISABLE_CARD);
-}
-#endif
-
/*
* shpchprm_find_available_resources
*
@@ -345,19 +328,6 @@
}
}

-#if link_available
- ++index;
-
- while (index < 8) {
- if (((func = shpchp_slot_find(primary_bus, dev_func >> 3, index)) != NULL) && populated_slot)
- rc = link_available_resources(ctrl, func, index);
-
- if (rc)
- break;
-
- ++index;
- }
-#endif
i--;
one_slot += sizeof(struct slot_rt);
}
diff -Nru a/drivers/pci/pci.h b/drivers/pci/pci.h
--- a/drivers/pci/pci.h Thu Apr 15 10:06:13 2004
+++ b/drivers/pci/pci.h Thu Apr 15 10:06:13 2004
@@ -60,3 +60,5 @@

/* Lock for read/write access to pci device and bus lists */
extern spinlock_t pci_bus_lock;
+
+extern int pciehp_msi_quirk;
diff -Nru a/drivers/pci/quirks.c b/drivers/pci/quirks.c
--- a/drivers/pci/quirks.c Thu Apr 15 10:06:13 2004
+++ b/drivers/pci/quirks.c Thu Apr 15 10:06:13 2004
@@ -868,6 +868,13 @@
}
#endif /* CONFIG_SCSI_SATA */

+int pciehp_msi_quirk;
+
+static void __devinit quirk_pciehp_msi(struct pci_dev *pdev)
+{
+ pciehp_msi_quirk = 1;
+}
+
/*
* The main table of quirks.
*
@@ -984,6 +991,8 @@
quirk_intel_ide_combined },
#endif /* CONFIG_SCSI_SATA */

+ { PCI_FIXUP_FINAL, PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SMCH, quirk_pciehp_msi },
+
{ 0 }
};

@@ -1008,3 +1017,5 @@
pci_do_fixups(dev, pass, pcibios_fixups);
pci_do_fixups(dev, pass, pci_fixups);
}
+
+EXPORT_SYMBOL(pciehp_msi_quirk);
diff -Nru a/include/linux/pci_ids.h b/include/linux/pci_ids.h
--- a/include/linux/pci_ids.h Thu Apr 15 10:06:13 2004
+++ b/include/linux/pci_ids.h Thu Apr 15 10:06:13 2004
@@ -2073,6 +2073,7 @@
#define PCI_DEVICE_ID_INTEL_82830_CGC 0x3577
#define PCI_DEVICE_ID_INTEL_82855GM_HB 0x3580
#define PCI_DEVICE_ID_INTEL_82855GM_IG 0x3582
+#define PCI_DEVICE_ID_INTEL_SMCH 0x3590
#define PCI_DEVICE_ID_INTEL_80310 0x530d
#define PCI_DEVICE_ID_INTEL_82371SB_0 0x7000
#define PCI_DEVICE_ID_INTEL_82371SB_1 0x7010

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