patch-2.4.19 linux-2.4.19/include/asm-ppc64/eeh.h

• Lines: 153
• Date: Fri Aug 2 17:39:45 2002
• Orig file: linux-2.4.18/include/asm-ppc64/eeh.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.18/include/asm-ppc64/eeh.h linux-2.4.19/include/asm-ppc64/eeh.h
@@ -0,0 +1,152 @@
+/* 
+ * eeh.h
+ * Copyright (C) 2001  Dave Engebretsen & Todd Inglett IBM Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ */
+
+/* Start Change Log
+ * 2001/10/27 : engebret : Created.
+ * End Change Log 
+ */
+
+#ifndef _EEH_H
+#define _EEH_H
+
+struct pci_dev;
+
+#define IO_UNMAPPED_REGION_ID 0xaUL
+
+#define IO_TOKEN_TO_ADDR(token) ((((unsigned long)(token)) & 0xFFFFFFFF) | (0xEUL << 60))
+/* Flag bits encoded in the 3 unused function bits of devfn */
+#define EEH_TOKEN_DISABLED (1UL << 34UL)	/* eeh is disabled for this token */
+#define IS_EEH_TOKEN_DISABLED(token) ((unsigned long)(token) & EEH_TOKEN_DISABLED)
+
+#define EEH_STATE_OVERRIDE 1   /* IOA does not require eeh traps */
+#define EEH_STATE_FAILURE  16  /* */
+
+/* This is for profiling only */
+extern unsigned long eeh_total_mmio_ffs;
+
+extern int eeh_implemented;
+
+void eeh_init(void);
+static inline int is_eeh_implemented(void) { return eeh_implemented; }
+int eeh_get_state(unsigned long ea);
+unsigned long eeh_check_failure(void *token, unsigned long val);
+
+#define EEH_DISABLE		0
+#define EEH_ENABLE		1
+#define EEH_RELEASE_LOADSTORE	2
+#define EEH_RELEASE_DMA		3
+int eeh_set_option(struct pci_dev *dev, int options);
+
+/* Given a PCI device check if eeh should be configured or not.
+ * This may look at firmware properties and/or kernel cmdline options.
+ */
+int is_eeh_configured(struct pci_dev *dev);
+
+/* Generate an EEH token.
+ * The high nibble of the offset is cleared, otherwise bounds checking is performed.
+ * Use IO_TOKEN_TO_ADDR(token) to translate this token back to a mapped virtual addr.
+ * Do NOT do this to perform IO -- use the read/write macros!
+ */
+unsigned long eeh_token(unsigned long phb,
+			unsigned long bus,
+			unsigned long devfn,
+			unsigned long offset);
+
+extern void *memcpy(void *, const void *, unsigned long);
+extern void *memset(void *,int, unsigned long);
+
+/* EEH_POSSIBLE_ERROR() -- test for possible MMIO failure.
+ *
+ * Order this macro for performance.
+ * If EEH is off for a device and it is a memory BAR, ioremap will
+ * map it to the IOREGION.  In this case addr == vaddr and since these
+ * should be in registers we compare them first.  Next we check for
+ * all ones which is perhaps fastest as ~val.  Finally we weed out
+ * EEH disabled IO BARs.
+ *
+ * If this macro yields TRUE, the caller relays to eeh_check_failure()
+ * which does further tests out of line.
+ */
+/* #define EEH_POSSIBLE_ERROR(addr, vaddr, val) ((vaddr) != (addr) && ~(val) == 0 && !IS_EEH_TOKEN_DISABLED(addr)) */
+/* This version is rearranged to collect some profiling data */
+#define EEH_POSSIBLE_ERROR(addr, vaddr, val) (~(val) == 0 && (++eeh_total_mmio_ffs, (vaddr) != (addr) && !IS_EEH_TOKEN_DISABLED(addr)))
+
+/* 
+ * MMIO read/write operations with EEH support.
+ *
+ * addr: 64b token of the form 0xA0PPBBDDyyyyyyyy
+ *       0xA0     : Unmapped MMIO region
+ *       PP       : PHB index (starting at zero)
+ *	 BB	  : PCI Bus number under given PHB
+ *	 DD	  : PCI devfn under given bus
+ *       yyyyyyyy : Virtual address offset
+ * 
+ * An actual virtual address is produced from this token
+ * by masking into the form:
+ *   0xE0000000yyyyyyyy
+ */
+static inline u8 eeh_readb(void *addr) {
+	volatile u8 *vaddr = (volatile u8 *)IO_TOKEN_TO_ADDR(addr);
+	u8 val = in_8(vaddr);
+	if (EEH_POSSIBLE_ERROR(addr, vaddr, val))
+		return eeh_check_failure(addr, val);
+	return val;
+}
+static inline void eeh_writeb(u8 val, void *addr) {
+	volatile u8 *vaddr = (volatile u8 *)IO_TOKEN_TO_ADDR(addr);
+	out_8(vaddr, val);
+}
+static inline u16 eeh_readw(void *addr) {
+	volatile u16 *vaddr = (volatile u16 *)IO_TOKEN_TO_ADDR(addr);
+	u16 val = in_le16(vaddr);
+	if (EEH_POSSIBLE_ERROR(addr, vaddr, val))
+		return eeh_check_failure(addr, val);
+	return val;
+}
+static inline void eeh_writew(u16 val, void *addr) {
+	volatile u16 *vaddr = (volatile u16 *)IO_TOKEN_TO_ADDR(addr);
+	out_le16(vaddr, val);
+}
+static inline u32 eeh_readl(void *addr) {
+	volatile u32 *vaddr = (volatile u32 *)IO_TOKEN_TO_ADDR(addr);
+	u32 val = in_le32(vaddr);
+	if (EEH_POSSIBLE_ERROR(addr, vaddr, val))
+		return eeh_check_failure(addr, val);
+	return val;
+}
+static inline void eeh_writel(u32 val, void *addr) {
+	volatile u32 *vaddr = (volatile u32 *)IO_TOKEN_TO_ADDR(addr);
+	out_le32(vaddr, val);
+}
+
+static inline void eeh_memset_io(void *addr, int c, unsigned long n) {
+	void *vaddr = (void *)IO_TOKEN_TO_ADDR(addr);
+	memset(vaddr, c, n);
+}
+static inline void eeh_memcpy_fromio(void *dest, void *src, unsigned long n) {
+	void *vsrc = (void *)IO_TOKEN_TO_ADDR(src);
+	memcpy(dest, vsrc, n);
+	/* look for ffff's here at dest[n] */
+}
+static inline void eeh_memcpy_toio(void *dest, void *src, unsigned long n) {
+	void *vdest = (void *)IO_TOKEN_TO_ADDR(dest);
+	memcpy(vdest, src, n);
+}
+
+#endif /* _EEH_H */