2 * s390 specific pci instructions
4 * Copyright IBM Corp. 2013
7 #include <linux/export.h>
8 #include <linux/errno.h>
9 #include <linux/delay.h>
10 #include <asm/pci_insn.h>
12 #define ZPCI_INSN_BUSY_DELAY 1 /* 1 microsecond */
14 /* Modify PCI Function Controls */
15 static inline u8 __mpcifc(u64 req, struct zpci_fib *fib, u8 *status)
20 " .insn rxy,0xe300000000d0,%[req],%[fib]\n"
23 : [cc] "=d" (cc), [req] "+d" (req), [fib] "+Q" (*fib)
25 *status = req >> 24 & 0xff;
29 int s390pci_mod_fc(u64 req, struct zpci_fib *fib)
34 cc = __mpcifc(req, fib, &status);
36 msleep(ZPCI_INSN_BUSY_DELAY);
40 printk_once(KERN_ERR "%s: error cc: %d status: %d\n",
41 __func__, cc, status);
42 return (cc) ? -EIO : 0;
45 /* Refresh PCI Translations */
46 static inline u8 __rpcit(u64 fn, u64 addr, u64 range, u8 *status)
48 register u64 __addr asm("2") = addr;
49 register u64 __range asm("3") = range;
53 " .insn rre,0xb9d30000,%[fn],%[addr]\n"
56 : [cc] "=d" (cc), [fn] "+d" (fn)
57 : [addr] "d" (__addr), "d" (__range)
59 *status = fn >> 24 & 0xff;
63 int s390pci_refresh_trans(u64 fn, u64 addr, u64 range)
68 cc = __rpcit(fn, addr, range, &status);
70 udelay(ZPCI_INSN_BUSY_DELAY);
74 printk_once(KERN_ERR "%s: error cc: %d status: %d dma_addr: %Lx size: %Lx\n",
75 __func__, cc, status, addr, range);
76 return (cc) ? -EIO : 0;
79 /* Set Interruption Controls */
80 void set_irq_ctrl(u16 ctl, char *unused, u8 isc)
83 " .insn rsy,0xeb00000000d1,%[ctl],%[isc],%[u]\n"
84 : : [ctl] "d" (ctl), [isc] "d" (isc << 27), [u] "Q" (*unused));
88 static inline u8 __pcilg(u64 *data, u64 req, u64 offset, u8 *status)
90 register u64 __req asm("2") = req;
91 register u64 __offset asm("3") = offset;
96 " .insn rre,0xb9d20000,%[data],%[req]\n"
99 : [cc] "=d" (cc), [data] "=d" (__data), [req] "+d" (__req)
102 *status = __req >> 24 & 0xff;
107 int s390pci_load(u64 *data, u64 req, u64 offset)
112 cc = __pcilg(data, req, offset, &status);
114 udelay(ZPCI_INSN_BUSY_DELAY);
118 printk_once(KERN_ERR "%s: error cc: %d status: %d req: %Lx offset: %Lx\n",
119 __func__, cc, status, req, offset);
120 /* TODO: on IO errors set data to 0xff...
121 * here or in users of pcilg (le conversion)?
124 return (cc) ? -EIO : 0;
126 EXPORT_SYMBOL_GPL(s390pci_load);
129 static inline u8 __pcistg(u64 data, u64 req, u64 offset, u8 *status)
131 register u64 __req asm("2") = req;
132 register u64 __offset asm("3") = offset;
136 " .insn rre,0xb9d00000,%[data],%[req]\n"
139 : [cc] "=d" (cc), [req] "+d" (__req)
140 : "d" (__offset), [data] "d" (data)
142 *status = __req >> 24 & 0xff;
146 int s390pci_store(u64 data, u64 req, u64 offset)
151 cc = __pcistg(data, req, offset, &status);
153 udelay(ZPCI_INSN_BUSY_DELAY);
157 printk_once(KERN_ERR "%s: error cc: %d status: %d req: %Lx offset: %Lx\n",
158 __func__, cc, status, req, offset);
159 return (cc) ? -EIO : 0;
161 EXPORT_SYMBOL_GPL(s390pci_store);
163 /* PCI Store Block */
164 static inline u8 __pcistb(const u64 *data, u64 req, u64 offset, u8 *status)
169 " .insn rsy,0xeb00000000d0,%[req],%[offset],%[data]\n"
172 : [cc] "=d" (cc), [req] "+d" (req)
173 : [offset] "d" (offset), [data] "Q" (*data)
175 *status = req >> 24 & 0xff;
179 int s390pci_store_block(const u64 *data, u64 req, u64 offset)
184 cc = __pcistb(data, req, offset, &status);
186 udelay(ZPCI_INSN_BUSY_DELAY);
190 printk_once(KERN_ERR "%s: error cc: %d status: %d req: %Lx offset: %Lx\n",
191 __func__, cc, status, req, offset);
192 return (cc) ? -EIO : 0;
194 EXPORT_SYMBOL_GPL(s390pci_store_block);