Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / s390 / pci / pci_insn.c

diff --git a/kernel/arch/s390/pci/pci_insn.c b/kernel/arch/s390/pci/pci_insn.c
new file mode 100644 (file)
index 0000000..85267c0
--- /dev/null
+++ b/kernel/arch/s390/pci/pci_insn.c
@@ -0,0 +1,202 @@
+/*
+ * s390 specific pci instructions
+ *
+ * Copyright IBM Corp. 2013
+ */
+
+#include <linux/export.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <asm/pci_insn.h>
+#include <asm/processor.h>
+
+#define ZPCI_INSN_BUSY_DELAY   1       /* 1 microsecond */
+
+/* Modify PCI Function Controls */
+static inline u8 __mpcifc(u64 req, struct zpci_fib *fib, u8 *status)
+{
+       u8 cc;
+
+       asm volatile (
+               "       .insn   rxy,0xe300000000d0,%[req],%[fib]\n"
+               "       ipm     %[cc]\n"
+               "       srl     %[cc],28\n"
+               : [cc] "=d" (cc), [req] "+d" (req), [fib] "+Q" (*fib)
+               : : "cc");
+       *status = req >> 24 & 0xff;
+       return cc;
+}
+
+int zpci_mod_fc(u64 req, struct zpci_fib *fib)
+{
+       u8 cc, status;
+
+       do {
+               cc = __mpcifc(req, fib, &status);
+               if (cc == 2)
+                       msleep(ZPCI_INSN_BUSY_DELAY);
+       } while (cc == 2);
+
+       if (cc)
+               printk_once(KERN_ERR "%s: error cc: %d  status: %d\n",
+                            __func__, cc, status);
+       return (cc) ? -EIO : 0;
+}
+
+/* Refresh PCI Translations */
+static inline u8 __rpcit(u64 fn, u64 addr, u64 range, u8 *status)
+{
+       register u64 __addr asm("2") = addr;
+       register u64 __range asm("3") = range;
+       u8 cc;
+
+       asm volatile (
+               "       .insn   rre,0xb9d30000,%[fn],%[addr]\n"
+               "       ipm     %[cc]\n"
+               "       srl     %[cc],28\n"
+               : [cc] "=d" (cc), [fn] "+d" (fn)
+               : [addr] "d" (__addr), "d" (__range)
+               : "cc");
+       *status = fn >> 24 & 0xff;
+       return cc;
+}
+
+int zpci_refresh_trans(u64 fn, u64 addr, u64 range)
+{
+       u8 cc, status;
+
+       do {
+               cc = __rpcit(fn, addr, range, &status);
+               if (cc == 2)
+                       udelay(ZPCI_INSN_BUSY_DELAY);
+       } while (cc == 2);
+
+       if (cc)
+               printk_once(KERN_ERR "%s: error cc: %d  status: %d  dma_addr: %Lx  size: %Lx\n",
+                           __func__, cc, status, addr, range);
+       return (cc) ? -EIO : 0;
+}
+
+/* Set Interruption Controls */
+void zpci_set_irq_ctrl(u16 ctl, char *unused, u8 isc)
+{
+       asm volatile (
+               "       .insn   rsy,0xeb00000000d1,%[ctl],%[isc],%[u]\n"
+               : : [ctl] "d" (ctl), [isc] "d" (isc << 27), [u] "Q" (*unused));
+}
+
+/* PCI Load */
+static inline int __pcilg(u64 *data, u64 req, u64 offset, u8 *status)
+{
+       register u64 __req asm("2") = req;
+       register u64 __offset asm("3") = offset;
+       int cc = -ENXIO;
+       u64 __data;
+
+       asm volatile (
+               "       .insn   rre,0xb9d20000,%[data],%[req]\n"
+               "0:     ipm     %[cc]\n"
+               "       srl     %[cc],28\n"
+               "1:\n"
+               EX_TABLE(0b, 1b)
+               : [cc] "+d" (cc), [data] "=d" (__data), [req] "+d" (__req)
+               :  "d" (__offset)
+               : "cc");
+       *status = __req >> 24 & 0xff;
+       if (!cc)
+               *data = __data;
+
+       return cc;
+}
+
+int zpci_load(u64 *data, u64 req, u64 offset)
+{
+       u8 status;
+       int cc;
+
+       do {
+               cc = __pcilg(data, req, offset, &status);
+               if (cc == 2)
+                       udelay(ZPCI_INSN_BUSY_DELAY);
+       } while (cc == 2);
+
+       if (cc)
+               printk_once(KERN_ERR "%s: error cc: %d  status: %d  req: %Lx  offset: %Lx\n",
+                           __func__, cc, status, req, offset);
+       return (cc > 0) ? -EIO : cc;
+}
+EXPORT_SYMBOL_GPL(zpci_load);
+
+/* PCI Store */
+static inline int __pcistg(u64 data, u64 req, u64 offset, u8 *status)
+{
+       register u64 __req asm("2") = req;
+       register u64 __offset asm("3") = offset;
+       int cc = -ENXIO;
+
+       asm volatile (
+               "       .insn   rre,0xb9d00000,%[data],%[req]\n"
+               "0:     ipm     %[cc]\n"
+               "       srl     %[cc],28\n"
+               "1:\n"
+               EX_TABLE(0b, 1b)
+               : [cc] "+d" (cc), [req] "+d" (__req)
+               : "d" (__offset), [data] "d" (data)
+               : "cc");
+       *status = __req >> 24 & 0xff;
+       return cc;
+}
+
+int zpci_store(u64 data, u64 req, u64 offset)
+{
+       u8 status;
+       int cc;
+
+       do {
+               cc = __pcistg(data, req, offset, &status);
+               if (cc == 2)
+                       udelay(ZPCI_INSN_BUSY_DELAY);
+       } while (cc == 2);
+
+       if (cc)
+               printk_once(KERN_ERR "%s: error cc: %d  status: %d  req: %Lx  offset: %Lx\n",
+                       __func__, cc, status, req, offset);
+       return (cc > 0) ? -EIO : cc;
+}
+EXPORT_SYMBOL_GPL(zpci_store);
+
+/* PCI Store Block */
+static inline int __pcistb(const u64 *data, u64 req, u64 offset, u8 *status)
+{
+       int cc = -ENXIO;
+
+       asm volatile (
+               "       .insn   rsy,0xeb00000000d0,%[req],%[offset],%[data]\n"
+               "0:     ipm     %[cc]\n"
+               "       srl     %[cc],28\n"
+               "1:\n"
+               EX_TABLE(0b, 1b)
+               : [cc] "+d" (cc), [req] "+d" (req)
+               : [offset] "d" (offset), [data] "Q" (*data)
+               : "cc");
+       *status = req >> 24 & 0xff;
+       return cc;
+}
+
+int zpci_store_block(const u64 *data, u64 req, u64 offset)
+{
+       u8 status;
+       int cc;
+
+       do {
+               cc = __pcistb(data, req, offset, &status);
+               if (cc == 2)
+                       udelay(ZPCI_INSN_BUSY_DELAY);
+       } while (cc == 2);
+
+       if (cc)
+               printk_once(KERN_ERR "%s: error cc: %d  status: %d  req: %Lx  offset: %Lx\n",
+                           __func__, cc, status, req, offset);
+       return (cc > 0) ? -EIO : cc;
+}
+EXPORT_SYMBOL_GPL(zpci_store_block);