remove some pci patches that should be dropped

4 files changed, 0 insertions, 508 deletions

diff --git a/pci/pci-legacy-i-o-port-free-driver-changes-to-generic-pci-code.patch b/pci/pci-legacy-i-o-port-free-driver-changes-to-generic-pci-code.patch
deleted file mode 100644
index c874c0508fbeb..0000000000000
--- a/pci/pci-legacy-i-o-port-free-driver-changes-to-generic-pci-code.patch
+++ /dev/null
@@ -1,186 +0,0 @@
-From kaneshige.kenji@jp.fujitsu.com Sun Mar 26 21:37:51 2006
-Message-ID: <4427799E.1070902@jp.fujitsu.com>
-Date: Mon, 27 Mar 2006 14:35:26 +0900
-From: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
-To: Andrew Morton <akpm@osdl.org>
-CC: greg@kroah.com, linux-kernel@vger.kernel.org, linux-pci@atrey.karlin.mff.cuni.cz
-Subject: PCI: legacy I/O port free driver - Changes to generic PCI code
-
-This patch adds the following changes into generic PCI code especially
-for PCI legacy free drivers.
-
-    - Moved the following two things from pci_enable_device() into
-      pci_enable_device_bars(). By this change, we can use
-      pci_enable_device_bars() to enable only the specific regions.
-
-          o Call pci_fixup_device() on the device
-          o Set dev->is_enabled
-
-    - Added new field 'bars_enabled' into struct pci_device to
-      remember which BARs already enabled. This new field is
-      initialized at pci_enable_device_bars() time and cleared
-      at pci_disable_device() time.
-
-    - Changed pci_request_regions()/pci_release_regions() to
-      request/release only the regions which have already been
-      enabled.
-
-    - Added helper routine pci_select_bars() which makes proper mask
-      of BARs from the specified resource type. This would be very
-      helpful for users of pci_enable_device_bars().
-
-Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
-Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
-
----
- drivers/pci/pci-driver.c |    3 ++-
- drivers/pci/pci.c        |   47 ++++++++++++++++++++++++++++++++++++++++-------
- include/linux/pci.h      |    2 ++
- 3 files changed, 44 insertions(+), 8 deletions(-)
-
---- gregkh-2.6.orig/drivers/pci/pci-driver.c
-+++ gregkh-2.6/drivers/pci/pci-driver.c
-@@ -318,7 +318,8 @@ static int pci_default_resume(struct pci
- 	pci_restore_state(pci_dev);
- 	/* if the device was enabled before suspend, reenable */
- 	if (pci_dev->is_enabled)
--		retval = pci_enable_device(pci_dev);
-+		retval = pci_enable_device_bars(pci_dev,
-+						pci_dev->bars_enabled);
- 	/* if the device was busmaster before the suspend, make it busmaster again */
- 	if (pci_dev->is_busmaster)
- 		pci_set_master(pci_dev);
---- gregkh-2.6.orig/drivers/pci/pci.c
-+++ gregkh-2.6/drivers/pci/pci.c
-@@ -503,6 +503,9 @@ pci_enable_device_bars(struct pci_dev *d
- 	err = pcibios_enable_device(dev, bars);
- 	if (err < 0)
- 		return err;
-+	pci_fixup_device(pci_fixup_enable, dev);
-+	dev->is_enabled = 1;
-+	dev->bars_enabled = bars;
- 	return 0;
- }
- 
-@@ -525,8 +528,6 @@ pci_enable_device(struct pci_dev *dev)
- 	err = pci_enable_device_bars(dev, (1 << PCI_NUM_RESOURCES) - 1);
- 	if (err)
- 		return err;
--	pci_fixup_device(pci_fixup_enable, dev);
--	dev->is_enabled = 1;
- 	return 0;
- }
- 
-@@ -568,6 +569,7 @@ pci_disable_device(struct pci_dev *dev)
- 
- 	pcibios_disable_device(dev);
- 	dev->is_enabled = 0;
-+	dev->bars_enabled = 0;
- }
- 
- /**
-@@ -650,6 +652,12 @@ void pci_release_region(struct pci_dev *
- {
- 	if (pci_resource_len(pdev, bar) == 0)
- 		return;
-+	if (!(pdev->bars_enabled & (1 << bar))) {
-+		dev_warn(&pdev->dev,
-+			 "Trying to release region #%d that is not enabled\n",
-+			 bar + 1);
-+		return;
-+	}
- 	if (pci_resource_flags(pdev, bar) & IORESOURCE_IO)
- 		release_region(pci_resource_start(pdev, bar),
- 				pci_resource_len(pdev, bar));
-@@ -676,7 +684,12 @@ int pci_request_region(struct pci_dev *p
- {
- 	if (pci_resource_len(pdev, bar) == 0)
- 		return 0;
--		
-+	if (!(pdev->bars_enabled & (1 << bar))) {
-+		dev_warn(&pdev->dev,
-+			 "Trying to request region #%d that is not enabled\n",
-+			 bar + 1);
-+		goto err_out;
-+	}
- 	if (pci_resource_flags(pdev, bar) & IORESOURCE_IO) {
- 		if (!request_region(pci_resource_start(pdev, bar),
- 			    pci_resource_len(pdev, bar), res_name))
-@@ -716,7 +729,8 @@ void pci_release_regions(struct pci_dev 
- 	int i;
- 	
- 	for (i = 0; i < 6; i++)
--		pci_release_region(pdev, i);
-+		if (pdev->bars_enabled & (1 << i))
-+			pci_release_region(pdev, i);
- }
- 
- /**
-@@ -737,13 +751,15 @@ int pci_request_regions(struct pci_dev *
- 	int i;
- 	
- 	for (i = 0; i < 6; i++)
--		if(pci_request_region(pdev, i, res_name))
--			goto err_out;
-+		if (pdev->bars_enabled & (1 << i))
-+			if(pci_request_region(pdev, i, res_name))
-+				goto err_out;
- 	return 0;
- 
- err_out:
- 	while(--i >= 0)
--		pci_release_region(pdev, i);
-+		if (pdev->bars_enabled & (1 << i))
-+			pci_release_region(pdev, i);
- 		
- 	return -EBUSY;
- }
-@@ -918,6 +934,22 @@ pci_set_consistent_dma_mask(struct pci_d
- }
- #endif
-      
-+/**
-+ * pci_select_bars - Make BAR mask from the type of resource
-+ * @pdev: the PCI device for which BAR mask is made
-+ * @flags: resource type mask to be selected
-+ *
-+ * This helper routine makes bar mask from the type of resource.
-+ */
-+int pci_select_bars(struct pci_dev *dev, unsigned long flags)
-+{
-+	int i, bars = 0;
-+	for (i = 0; i < PCI_NUM_RESOURCES; i++)
-+		if (pci_resource_flags(dev, i) & flags)
-+			bars |= (1 << i);
-+	return bars;
-+}
-+
- static int __devinit pci_init(void)
- {
- 	struct pci_dev *dev = NULL;
-@@ -975,6 +1007,7 @@ EXPORT_SYMBOL(pci_set_dma_mask);
- EXPORT_SYMBOL(pci_set_consistent_dma_mask);
- EXPORT_SYMBOL(pci_assign_resource);
- EXPORT_SYMBOL(pci_find_parent_resource);
-+EXPORT_SYMBOL(pci_select_bars);
- 
- EXPORT_SYMBOL(pci_set_power_state);
- EXPORT_SYMBOL(pci_save_state);
---- gregkh-2.6.orig/include/linux/pci.h
-+++ gregkh-2.6/include/linux/pci.h
-@@ -171,6 +171,7 @@ struct pci_dev {
- 	struct bin_attribute *rom_attr; /* attribute descriptor for sysfs ROM entry */
- 	int rom_attr_enabled;		/* has display of the rom attribute been enabled? */
- 	struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */
-+	int	bars_enabled;		/* BARs enabled */
- };
- 
- #define pci_dev_g(n) list_entry(n, struct pci_dev, global_list)
-@@ -504,6 +505,7 @@ void pci_update_resource(struct pci_dev 
- int pci_assign_resource(struct pci_dev *dev, int i);
- int pci_assign_resource_fixed(struct pci_dev *dev, int i);
- void pci_restore_bars(struct pci_dev *dev);
-+int pci_select_bars(struct pci_dev *dev, unsigned long flags);
- 
- /* ROM control related routines */
- void __iomem __must_check *pci_map_rom(struct pci_dev *pdev, size_t *size);
diff --git a/pci/pci-legacy-i-o-port-free-driver-make-emulex-lpfc-driver-legacy-i-o-port-free.patch b/pci/pci-legacy-i-o-port-free-driver-make-emulex-lpfc-driver-legacy-i-o-port-free.patch
deleted file mode 100644
index 2cfd19873f175..0000000000000
--- a/pci/pci-legacy-i-o-port-free-driver-make-emulex-lpfc-driver-legacy-i-o-port-free.patch
+++ /dev/null
@@ -1,30 +0,0 @@
-From kaneshige.kenji@jp.fujitsu.com Thu Mar 23 21:43:15 2006
-Message-ID: <44238546.6080401@jp.fujitsu.com>
-Date: Fri, 24 Mar 2006 14:36:06 +0900
-From: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
-To: Greg KH <greg@kroah.com>
-CC: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>, Andrew Morton <akpm@osdl.org>
-Subject: PCI: legacy I/O port free driver - Make Emulex lpfc driver legacy I/O port free
-
-This patch makes Emulex lpfc driver legacy I/O port free.
-
-Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
-Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
-
----
- drivers/scsi/lpfc/lpfc_init.c |    3 ++-
- 1 file changed, 2 insertions(+), 1 deletion(-)
-
---- gregkh-2.6.orig/drivers/scsi/lpfc/lpfc_init.c
-+++ gregkh-2.6/drivers/scsi/lpfc/lpfc_init.c
-@@ -1425,8 +1425,9 @@ lpfc_pci_probe_one(struct pci_dev *pdev,
- 	int error = -ENODEV, retval;
- 	int i;
- 	uint16_t iotag;
-+	int bars = pci_select_bars(pdev, IORESOURCE_MEM);
- 
--	if (pci_enable_device(pdev))
-+	if (pci_enable_device_bars(pdev, bars))
- 		goto out;
- 	if (pci_request_regions(pdev, LPFC_DRIVER_NAME))
- 		goto out_disable_device;
diff --git a/pci/pci-legacy-i-o-port-free-driver-make-intel-e1000-driver-legacy-i-o-port-free.patch b/pci/pci-legacy-i-o-port-free-driver-make-intel-e1000-driver-legacy-i-o-port-free.patch
deleted file mode 100644
index 9fcaaa21b6b12..0000000000000
--- a/pci/pci-legacy-i-o-port-free-driver-make-intel-e1000-driver-legacy-i-o-port-free.patch
+++ /dev/null
@@ -1,200 +0,0 @@
-From kaneshige.kenji@jp.fujitsu.com Thu Mar 23 21:41:53 2006
-Message-ID: <442384EA.60606@jp.fujitsu.com>
-Date: Fri, 24 Mar 2006 14:34:34 +0900
-From: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
-To: Greg KH <greg@kroah.com>
-CC: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>, Andrew Morton <akpm@osdl.org>
-Subject: PCI: legacy I/O port free driver - Make Intel e1000 driver legacy I/O port free
-
-This patch makes Intel e1000 driver legacy I/O port free.
-
-Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
-Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
-
----
- drivers/net/e1000/e1000.h      |    6 +-
- drivers/net/e1000/e1000_main.c |  123 ++++++++++++++++++++++-------------------
- 2 files changed, 71 insertions(+), 58 deletions(-)
-
---- gregkh-2.6.orig/drivers/net/e1000/e1000.h
-+++ gregkh-2.6/drivers/net/e1000/e1000.h
-@@ -78,8 +78,9 @@
- #define BAR_1		1
- #define BAR_5		5
- 
--#define INTEL_E1000_ETHERNET_DEVICE(device_id) {\
--	PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
-+#define E1000_NO_IOPORT	(1 << 0)
-+#define INTEL_E1000_ETHERNET_DEVICE(device_id, flags) {\
-+	PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id), .driver_data = flags}
- 
- struct e1000_adapter;
- 
-@@ -340,6 +341,7 @@ struct e1000_adapter {
- #ifdef NETIF_F_TSO
- 	boolean_t tso_force;
- #endif
-+	int bars;	/* BARs to be enabled */
- };
- 
- 
---- gregkh-2.6.orig/drivers/net/e1000/e1000_main.c
-+++ gregkh-2.6/drivers/net/e1000/e1000_main.c
-@@ -48,54 +48,54 @@ static char e1000_copyright[] = "Copyrig
-  *   {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
-  */
- static struct pci_device_id e1000_pci_tbl[] = {
--	INTEL_E1000_ETHERNET_DEVICE(0x1000),
--	INTEL_E1000_ETHERNET_DEVICE(0x1001),
--	INTEL_E1000_ETHERNET_DEVICE(0x1004),
--	INTEL_E1000_ETHERNET_DEVICE(0x1008),
--	INTEL_E1000_ETHERNET_DEVICE(0x1009),
--	INTEL_E1000_ETHERNET_DEVICE(0x100C),
--	INTEL_E1000_ETHERNET_DEVICE(0x100D),
--	INTEL_E1000_ETHERNET_DEVICE(0x100E),
--	INTEL_E1000_ETHERNET_DEVICE(0x100F),
--	INTEL_E1000_ETHERNET_DEVICE(0x1010),
--	INTEL_E1000_ETHERNET_DEVICE(0x1011),
--	INTEL_E1000_ETHERNET_DEVICE(0x1012),
--	INTEL_E1000_ETHERNET_DEVICE(0x1013),
--	INTEL_E1000_ETHERNET_DEVICE(0x1014),
--	INTEL_E1000_ETHERNET_DEVICE(0x1015),
--	INTEL_E1000_ETHERNET_DEVICE(0x1016),
--	INTEL_E1000_ETHERNET_DEVICE(0x1017),
--	INTEL_E1000_ETHERNET_DEVICE(0x1018),
--	INTEL_E1000_ETHERNET_DEVICE(0x1019),
--	INTEL_E1000_ETHERNET_DEVICE(0x101A),
--	INTEL_E1000_ETHERNET_DEVICE(0x101D),
--	INTEL_E1000_ETHERNET_DEVICE(0x101E),
--	INTEL_E1000_ETHERNET_DEVICE(0x1026),
--	INTEL_E1000_ETHERNET_DEVICE(0x1027),
--	INTEL_E1000_ETHERNET_DEVICE(0x1028),
--	INTEL_E1000_ETHERNET_DEVICE(0x105E),
--	INTEL_E1000_ETHERNET_DEVICE(0x105F),
--	INTEL_E1000_ETHERNET_DEVICE(0x1060),
--	INTEL_E1000_ETHERNET_DEVICE(0x1075),
--	INTEL_E1000_ETHERNET_DEVICE(0x1076),
--	INTEL_E1000_ETHERNET_DEVICE(0x1077),
--	INTEL_E1000_ETHERNET_DEVICE(0x1078),
--	INTEL_E1000_ETHERNET_DEVICE(0x1079),
--	INTEL_E1000_ETHERNET_DEVICE(0x107A),
--	INTEL_E1000_ETHERNET_DEVICE(0x107B),
--	INTEL_E1000_ETHERNET_DEVICE(0x107C),
--	INTEL_E1000_ETHERNET_DEVICE(0x107D),
--	INTEL_E1000_ETHERNET_DEVICE(0x107E),
--	INTEL_E1000_ETHERNET_DEVICE(0x107F),
--	INTEL_E1000_ETHERNET_DEVICE(0x108A),
--	INTEL_E1000_ETHERNET_DEVICE(0x108B),
--	INTEL_E1000_ETHERNET_DEVICE(0x108C),
--	INTEL_E1000_ETHERNET_DEVICE(0x1096),
--	INTEL_E1000_ETHERNET_DEVICE(0x1098),
--	INTEL_E1000_ETHERNET_DEVICE(0x1099),
--	INTEL_E1000_ETHERNET_DEVICE(0x109A),
--	INTEL_E1000_ETHERNET_DEVICE(0x10B5),
--	INTEL_E1000_ETHERNET_DEVICE(0x10B9),
-+	INTEL_E1000_ETHERNET_DEVICE(0x1000, E1000_NO_IOPORT),
-+	INTEL_E1000_ETHERNET_DEVICE(0x1001, E1000_NO_IOPORT),
-+	INTEL_E1000_ETHERNET_DEVICE(0x1004, E1000_NO_IOPORT),
-+	INTEL_E1000_ETHERNET_DEVICE(0x1008, 0),
-+	INTEL_E1000_ETHERNET_DEVICE(0x1009, 0),
-+	INTEL_E1000_ETHERNET_DEVICE(0x100C, 0),
-+	INTEL_E1000_ETHERNET_DEVICE(0x100D, 0),
-+	INTEL_E1000_ETHERNET_DEVICE(0x100E, 0),
-+	INTEL_E1000_ETHERNET_DEVICE(0x100F, 0),
-+	INTEL_E1000_ETHERNET_DEVICE(0x1010, 0),
-+	INTEL_E1000_ETHERNET_DEVICE(0x1011, 0),
-+	INTEL_E1000_ETHERNET_DEVICE(0x1012, 0),
-+	INTEL_E1000_ETHERNET_DEVICE(0x1013, 0),
-+	INTEL_E1000_ETHERNET_DEVICE(0x1014, E1000_NO_IOPORT),
-+	INTEL_E1000_ETHERNET_DEVICE(0x1015, 0),
-+	INTEL_E1000_ETHERNET_DEVICE(0x1016, 0),
-+	INTEL_E1000_ETHERNET_DEVICE(0x1017, 0),
-+	INTEL_E1000_ETHERNET_DEVICE(0x1018, 0),
-+	INTEL_E1000_ETHERNET_DEVICE(0x1019, E1000_NO_IOPORT),
-+	INTEL_E1000_ETHERNET_DEVICE(0x101A, E1000_NO_IOPORT),
-+	INTEL_E1000_ETHERNET_DEVICE(0x101D, 0),
-+	INTEL_E1000_ETHERNET_DEVICE(0x101E, 0),
-+	INTEL_E1000_ETHERNET_DEVICE(0x1026, E1000_NO_IOPORT),
-+	INTEL_E1000_ETHERNET_DEVICE(0x1027, E1000_NO_IOPORT),
-+	INTEL_E1000_ETHERNET_DEVICE(0x1028, E1000_NO_IOPORT),
-+	INTEL_E1000_ETHERNET_DEVICE(0x105E, E1000_NO_IOPORT),
-+	INTEL_E1000_ETHERNET_DEVICE(0x105F, E1000_NO_IOPORT),
-+	INTEL_E1000_ETHERNET_DEVICE(0x1060, E1000_NO_IOPORT),
-+	INTEL_E1000_ETHERNET_DEVICE(0x1075, E1000_NO_IOPORT),
-+	INTEL_E1000_ETHERNET_DEVICE(0x1076, 0),
-+	INTEL_E1000_ETHERNET_DEVICE(0x1077, 0),
-+	INTEL_E1000_ETHERNET_DEVICE(0x1078, 0),
-+	INTEL_E1000_ETHERNET_DEVICE(0x1079, E1000_NO_IOPORT),
-+	INTEL_E1000_ETHERNET_DEVICE(0x107A, E1000_NO_IOPORT),
-+	INTEL_E1000_ETHERNET_DEVICE(0x107B, E1000_NO_IOPORT),
-+	INTEL_E1000_ETHERNET_DEVICE(0x107C, 0),
-+	INTEL_E1000_ETHERNET_DEVICE(0x107D, E1000_NO_IOPORT),
-+	INTEL_E1000_ETHERNET_DEVICE(0x107E, E1000_NO_IOPORT),
-+	INTEL_E1000_ETHERNET_DEVICE(0x107F, E1000_NO_IOPORT),
-+	INTEL_E1000_ETHERNET_DEVICE(0x108A, E1000_NO_IOPORT),
-+	INTEL_E1000_ETHERNET_DEVICE(0x108B, E1000_NO_IOPORT),
-+	INTEL_E1000_ETHERNET_DEVICE(0x108C, E1000_NO_IOPORT),
-+	INTEL_E1000_ETHERNET_DEVICE(0x1096, 0),
-+	INTEL_E1000_ETHERNET_DEVICE(0x1098, 0),
-+	INTEL_E1000_ETHERNET_DEVICE(0x1099, E1000_NO_IOPORT),
-+	INTEL_E1000_ETHERNET_DEVICE(0x109A, E1000_NO_IOPORT),
-+	INTEL_E1000_ETHERNET_DEVICE(0x10B5, E1000_NO_IOPORT),
-+	INTEL_E1000_ETHERNET_DEVICE(0x10B9, 0),
- 	/* required last entry */
- 	{0,}
- };
-@@ -596,7 +596,14 @@ e1000_probe(struct pci_dev *pdev,
- 	int i, err, pci_using_dac;
- 	uint16_t eeprom_data;
- 	uint16_t eeprom_apme_mask = E1000_EEPROM_APME;
--	if ((err = pci_enable_device(pdev)))
-+	int bars;
-+
-+	if (ent->driver_data & E1000_NO_IOPORT)
-+		bars = pci_select_bars(pdev, IORESOURCE_MEM);
-+	else
-+		bars = pci_select_bars(pdev, IORESOURCE_MEM | IORESOURCE_IO);
-+
-+	if ((err = pci_enable_device_bars(pdev, bars)))
- 		return err;
- 
- 	if (!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK))) {
-@@ -629,6 +636,7 @@ e1000_probe(struct pci_dev *pdev,
- 	adapter->pdev = pdev;
- 	adapter->hw.back = adapter;
- 	adapter->msg_enable = (1 << debug) - 1;
-+	adapter->bars = bars;
- 
- 	mmio_start = pci_resource_start(pdev, BAR_0);
- 	mmio_len = pci_resource_len(pdev, BAR_0);
-@@ -639,12 +647,15 @@ e1000_probe(struct pci_dev *pdev,
- 		goto err_ioremap;
- 	}
- 
--	for (i = BAR_1; i <= BAR_5; i++) {
--		if (pci_resource_len(pdev, i) == 0)
--			continue;
--		if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
--			adapter->hw.io_base = pci_resource_start(pdev, i);
--			break;
-+	if (!(ent->driver_data & E1000_NO_IOPORT)) {
-+		for (i = BAR_1; i <= BAR_5; i++) {
-+			if (pci_resource_len(pdev, i) == 0)
-+				continue;
-+			if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
-+				adapter->hw.io_base =
-+					pci_resource_start(pdev, i);
-+				break;
-+			}
- 		}
- 	}
- 
-@@ -4553,7 +4564,7 @@ e1000_resume(struct pci_dev *pdev)
- 
- 	pci_set_power_state(pdev, PCI_D0);
- 	e1000_pci_restore_state(adapter);
--	ret_val = pci_enable_device(pdev);
-+	ret_val = pci_enable_device_bars(pdev, adapter->bars);
- 	pci_set_master(pdev);
- 
- 	pci_enable_wake(pdev, PCI_D3hot, 0);
diff --git a/pci/pci-legacy-i-o-port-free-driver-update-documentation-pci_txt.patch b/pci/pci-legacy-i-o-port-free-driver-update-documentation-pci_txt.patch
deleted file mode 100644
index 1022f045a9966..0000000000000
--- a/pci/pci-legacy-i-o-port-free-driver-update-documentation-pci_txt.patch
+++ /dev/null
@@ -1,92 +0,0 @@
-From kaneshige.kenji@jp.fujitsu.com Thu Mar 23 21:39:19 2006
-Message-ID: <44238469.8080009@jp.fujitsu.com>
-Date: Fri, 24 Mar 2006 14:32:25 +0900
-From: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
-To: Greg KH <greg@kroah.com>
-CC: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>, Andrew Morton <akpm@osdl.org>
-Subject: PCI: legacy I/O port free driver - Update Documentation/pci.txt
-
-This patch adds the description about legacy I/O port free driver into
-Documentation/pci.txt.
-
-Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
-Signed-off-by: Grant Grundler <grundler@parisc-linux.org>
-Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
-
----
- Documentation/pci.txt |   67 ++++++++++++++++++++++++++++++++++++++++++++++++++
- 1 file changed, 67 insertions(+)
-
---- gregkh-2.6.orig/Documentation/pci.txt
-+++ gregkh-2.6/Documentation/pci.txt
-@@ -287,3 +287,70 @@ having sane locking.
- pci_find_device()		Superseded by pci_get_device()
- pci_find_subsys()		Superseded by pci_get_subsys()
- pci_find_slot()			Superseded by pci_get_slot()
-+
-+
-+9. Legacy I/O port free driver
-+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-+Large servers may not be able to provide I/O port resources to all PCI
-+devices. I/O Port space is only 64KB on Intel Architecture[1] and is
-+likely also fragmented since the I/O base register of PCI-to-PCI
-+bridge will usually be aligned to a 4KB boundary[2]. On such systems,
-+pci_enable_device() and pci_request_regions() will fail when
-+attempting to enable I/O Port regions that don't have I/O Port
-+resources assigned.
-+
-+Fortunately, many PCI devices which request I/O Port resources also
-+provide access to the same registers via MMIO BARs. These devices can
-+be handled without using I/O port space and the drivers typically
-+offer a CONFIG_ option to only use MMIO regions
-+(e.g. CONFIG_TULIP_MMIO). PCI devices typically provide I/O port
-+interface for legacy OSs and will work when I/O port resources are not
-+assigned. The "PCI Local Bus Specification Revision 3.0" discusses
-+this on p.44, "IMPLEMENTATION NOTE".
-+
-+If your PCI device driver doesn't need I/O port resources assigned to
-+I/O Port BARs, you should use pci_enable_device_bars() instead of
-+pci_enable_device() in order not to enable I/O port regions for the
-+corresponding devices.
-+
-+[1] Some systems support 64KB I/O port space per PCI segment.
-+[2] Some PCI-to-PCI bridges support optional 1KB aligned I/O base.
-+
-+
-+10. MMIO Space and "Write Posting"
-+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-+Converting a driver from using I/O Port space to using MMIO space
-+often requires some additional changes. Specifically, "write posting"
-+needs to be handled. Most drivers (e.g. tg3, acenic, sym53c8xx_2)
-+already do. I/O Port space guarantees write transactions reach the PCI
-+device before the CPU can continue. Writes to MMIO space allow to CPU
-+continue before the transaction reaches the PCI device. HW weenies
-+call this "Write Posting" because the write completion is "posted" to
-+the CPU before the transaction has reached it's destination.
-+
-+Thus, timing sensitive code should add readl() where the CPU is
-+expected to wait before doing other work.  The classic "bit banging"
-+sequence works fine for I/O Port space:
-+
-+	for (i=8; --i; val >>= 1) {
-+		outb(val & 1, ioport_reg);	/* write bit */
-+		udelay(10);
-+	}
-+
-+The same sequence for MMIO space should be:
-+
-+	for (i=8; --i; val >>= 1) {
-+		writeb(val & 1, mmio_reg);	/* write bit */
-+		readb(safe_mmio_reg);		/* flush posted write */
-+		udelay(10);
-+	}
-+
-+It is important that "safe_mmio_reg" not have any side effects that
-+interferes with the correct operation of the device.
-+
-+Another case to watch out for is when resetting a PCI device. Use PCI
-+Configuration space reads to flush the writel(). This will gracefully
-+handle the PCI master abort on all platforms if the PCI device is
-+expected to not respond to a readl().  Most x86 platforms will allow
-+MMIO reads to master abort (aka "Soft Fail") and return garbage
-+(e.g. ~0). But many RISC platforms will crash (aka "Hard Fail").