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Message-ID: <20080803073756.GA8762@gollum.tnic>
Date: Sun, 3 Aug 2008 09:37:56 +0200
From: Borislav Petkov <petkovbb@...glemail.com>
To: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
Cc: alan@...hat.com, linux-kernel@...r.kernel.org,
linux-ide@...r.kernel.org
Subject: [PATCH 1/2] pata_legacy: export functionality to ide
Ok, here's a definitely better solution:
---
From: Borislav Petkov <petkovbb@...il.com>
Date: Sun, 3 Aug 2008 08:31:20 +0200
Subject: [PATCH 1/2] pata_legacy: export functionality to ide
export the legacy iobases checking code to other
users (ide) by pushing it up into the header.
CC: Alan Cox <alan@...hat.com>
Signed-off-by: Borislav Petkov <petkovbb@...il.com>
---
drivers/ata/pata_legacy.c | 63 +-----------------------------------------
include/linux/ata.h | 67 +++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 68 insertions(+), 62 deletions(-)
diff --git a/drivers/ata/pata_legacy.c b/drivers/ata/pata_legacy.c
index bc037ff..14d187e 100644
--- a/drivers/ata/pata_legacy.c
+++ b/drivers/ata/pata_legacy.c
@@ -50,7 +50,6 @@
#include <linux/kernel.h>
#include <linux/module.h>
-#include <linux/pci.h>
#include <linux/init.h>
#include <linux/blkdev.h>
#include <linux/delay.h>
@@ -1040,47 +1039,6 @@ fail:
return ret;
}
-/**
- * legacy_check_special_cases - ATA special cases
- * @p: PCI device to check
- * @master: set this if we find an ATA master
- * @master: set this if we find an ATA secondary
- *
- * A small number of vendors implemented early PCI ATA interfaces
- * on bridge logic without the ATA interface being PCI visible.
- * Where we have a matching PCI driver we must skip the relevant
- * device here. If we don't know about it then the legacy driver
- * is the right driver anyway.
- */
-
-static void __init legacy_check_special_cases(struct pci_dev *p, int *primary,
- int *secondary)
-{
- /* Cyrix CS5510 pre SFF MWDMA ATA on the bridge */
- if (p->vendor == 0x1078 && p->device == 0x0000) {
- *primary = *secondary = 1;
- return;
- }
- /* Cyrix CS5520 pre SFF MWDMA ATA on the bridge */
- if (p->vendor == 0x1078 && p->device == 0x0002) {
- *primary = *secondary = 1;
- return;
- }
- /* Intel MPIIX - PIO ATA on non PCI side of bridge */
- if (p->vendor == 0x8086 && p->device == 0x1234) {
- u16 r;
- pci_read_config_word(p, 0x6C, &r);
- if (r & 0x8000) {
- /* ATA port enabled */
- if (r & 0x4000)
- *secondary = 1;
- else
- *primary = 1;
- }
- return;
- }
-}
-
static __init void probe_opti_vlb(void)
{
/* If an OPTI 82C46X is present find out where the channels are */
@@ -1210,26 +1168,7 @@ static __init int legacy_init(void)
struct legacy_probe *pl = &probe_list[0];
int slot = 0;
- struct pci_dev *p = NULL;
-
- for_each_pci_dev(p) {
- int r;
- /* Check for any overlap of the system ATA mappings. Native
- mode controllers stuck on these addresses or some devices
- in 'raid' mode won't be found by the storage class test */
- for (r = 0; r < 6; r++) {
- if (pci_resource_start(p, r) == 0x1f0)
- primary = 1;
- if (pci_resource_start(p, r) == 0x170)
- secondary = 1;
- }
- /* Check for special cases */
- legacy_check_special_cases(p, &primary, &secondary);
-
- /* If PCI bus is present then don't probe for tertiary
- legacy ports */
- pci_present = 1;
- }
+ ata_legacy_check_iobases(&primary, &secondary, &pci_present);
if (winbond == 1)
winbond = 0x130; /* Default port, alt is 1B0 */
diff --git a/include/linux/ata.h b/include/linux/ata.h
index 11de32c..0470562 100644
--- a/include/linux/ata.h
+++ b/include/linux/ata.h
@@ -30,6 +30,7 @@
#define __LINUX_ATA_H__
#include <linux/types.h>
+#include <linux/pci.h>
/* defines only for the constants which don't work well as enums */
#define ATA_DMA_BOUNDARY 0xffffUL
@@ -776,4 +777,70 @@ static inline int lba_48_ok(u64 block, u32 n_block)
#define sata_pmp_gscr_rev(gscr) (((gscr)[SATA_PMP_GSCR_REV] >> 8) & 0xff)
#define sata_pmp_gscr_ports(gscr) ((gscr)[SATA_PMP_GSCR_PORT_INFO] & 0xf)
+/**
+ * legacy_check_special_cases - ATA special cases
+ * @p: PCI device to check
+ * @master: set this if we find an ATA master
+ * @master: set this if we find an ATA secondary
+ *
+ * A small number of vendors implemented early PCI ATA interfaces
+ * on bridge logic without the ATA interface being PCI visible.
+ * Where we have a matching PCI driver we must skip the relevant
+ * device here. If we don't know about it then the legacy driver
+ * is the right driver anyway.
+ */
+static inline void __init ata_legacy_check_special_cases(struct pci_dev *p,
+ int *primary,
+ int *secondary)
+{
+ /* Cyrix CS5510 pre SFF MWDMA ATA on the bridge */
+ if (p->vendor == 0x1078 && p->device == 0x0000) {
+ *primary = *secondary = 1;
+ return;
+ }
+ /* Cyrix CS5520 pre SFF MWDMA ATA on the bridge */
+ if (p->vendor == 0x1078 && p->device == 0x0002) {
+ *primary = *secondary = 1;
+ return;
+ }
+ /* Intel MPIIX - PIO ATA on non PCI side of bridge */
+ if (p->vendor == 0x8086 && p->device == 0x1234) {
+ u16 r;
+ pci_read_config_word(p, 0x6C, &r);
+ if (r & 0x8000) {
+ /* ATA port enabled */
+ if (r & 0x4000)
+ *secondary = 1;
+ else
+ *primary = 1;
+ }
+ return;
+ }
+}
+
+static inline void __init ata_legacy_check_iobases(int *primary, int *secondary,
+ int *pci_present)
+{
+ struct pci_dev *p = NULL;
+
+ for_each_pci_dev(p) {
+ int r;
+ /* Check for any overlap of the system ATA mappings. Native
+ mode controllers stuck on these addresses or some devices
+ in 'raid' mode won't be found by the storage class test */
+ for (r = 0; r < 6; r++) {
+ if (pci_resource_start(p, r) == 0x1f0)
+ *primary = 1;
+ if (pci_resource_start(p, r) == 0x170)
+ *secondary = 1;
+ }
+ /* Check for special cases */
+ ata_legacy_check_special_cases(p, primary, secondary);
+
+ /* If PCI bus is present then don't probe for tertiary
+ legacy ports */
+ *pci_present = 1;
+ }
+}
+
#endif /* __LINUX_ATA_H__ */
--
1.5.5.4
--
Regards/Gruss,
Boris.
--
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