2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
6 * Copyright (c) 2005 Silicon Graphics, Inc. All rights reserved.
9 #include <linux/module.h>
10 #include <linux/kernel.h>
11 #include <linux/version.h>
12 #include <linux/slab.h>
13 #include <linux/spinlock.h>
14 #include <linux/proc_fs.h>
15 #include <linux/device.h>
16 #include <linux/delay.h>
17 #include <asm/system.h>
18 #include <asm/uaccess.h>
19 #include <asm/sn/sn_sal.h>
20 #include <asm/sn/addrs.h>
21 #include <asm/sn/io.h>
22 #include <asm/sn/types.h>
23 #include <asm/sn/shubio.h>
24 #include <asm/sn/tiocx.h>
25 #include <asm/sn/l1.h>
26 #include <asm/sn/module.h>
28 #include "xtalk/xwidgetdev.h"
29 #include "xtalk/hubdev.h"
32 #define DEVICE_NAME "tiocx"
37 #define DBG(fmt...) printk(KERN_ALERT fmt)
42 struct device_attribute dev_attr_cxdev_control;
45 * tiocx_match - Try to match driver id list with device.
46 * @dev: device pointer
47 * @drv: driver pointer
49 * Returns 1 if match, 0 otherwise.
51 static int tiocx_match(struct device *dev, struct device_driver *drv)
53 struct cx_dev *cx_dev = to_cx_dev(dev);
54 struct cx_drv *cx_drv = to_cx_driver(drv);
55 const struct cx_device_id *ids = cx_drv->id_table;
60 while (ids->part_num) {
61 if (ids->part_num == cx_dev->cx_id.part_num)
69 static int tiocx_hotplug(struct device *dev, char **envp, int num_envp,
70 char *buffer, int buffer_size)
75 static void tiocx_bus_release(struct device *dev)
77 kfree(to_cx_dev(dev));
80 struct bus_type tiocx_bus_type = {
83 .hotplug = tiocx_hotplug,
87 * cx_device_match - Find cx_device in the id table.
88 * @ids: id table from driver
89 * @cx_device: part/mfg id for the device
92 static const struct cx_device_id *cx_device_match(const struct cx_device_id
94 struct cx_dev *cx_device)
97 * NOTES: We may want to check for CX_ANY_ID too.
98 * Do we want to match against nasid too?
99 * CX_DEV_NONE == 0, if the driver tries to register for
100 * part/mfg == 0 we should return no-match (NULL) here.
102 while (ids->part_num && ids->mfg_num) {
103 if (ids->part_num == cx_device->cx_id.part_num &&
104 ids->mfg_num == cx_device->cx_id.mfg_num)
113 * cx_device_probe - Look for matching device.
114 * Call driver probe routine if found.
115 * @cx_driver: driver table (cx_drv struct) from driver
116 * @cx_device: part/mfg id for the device
118 static int cx_device_probe(struct device *dev)
120 const struct cx_device_id *id;
121 struct cx_drv *cx_drv = to_cx_driver(dev->driver);
122 struct cx_dev *cx_dev = to_cx_dev(dev);
125 if (!cx_dev->driver && cx_drv->probe) {
126 id = cx_device_match(cx_drv->id_table, cx_dev);
128 if ((error = cx_drv->probe(cx_dev, id)) < 0)
131 cx_dev->driver = cx_drv;
139 * cx_driver_remove - Remove driver from device struct.
142 static int cx_driver_remove(struct device *dev)
144 struct cx_dev *cx_dev = to_cx_dev(dev);
145 struct cx_drv *cx_drv = cx_dev->driver;
147 cx_drv->remove(cx_dev);
148 cx_dev->driver = NULL;
153 * cx_driver_register - Register the driver.
154 * @cx_driver: driver table (cx_drv struct) from driver
156 * Called from the driver init routine to register a driver.
157 * The cx_drv struct contains the driver name, a pointer to
158 * a table of part/mfg numbers and a pointer to the driver's
159 * probe/attach routine.
161 int cx_driver_register(struct cx_drv *cx_driver)
163 cx_driver->driver.name = cx_driver->name;
164 cx_driver->driver.bus = &tiocx_bus_type;
165 cx_driver->driver.probe = cx_device_probe;
166 cx_driver->driver.remove = cx_driver_remove;
168 return driver_register(&cx_driver->driver);
172 * cx_driver_unregister - Unregister the driver.
173 * @cx_driver: driver table (cx_drv struct) from driver
175 int cx_driver_unregister(struct cx_drv *cx_driver)
177 driver_unregister(&cx_driver->driver);
182 * cx_device_register - Register a device.
183 * @nasid: device's nasid
184 * @part_num: device's part number
185 * @mfg_num: device's manufacturer number
186 * @hubdev: hub info associated with this device
190 cx_device_register(nasid_t nasid, int part_num, int mfg_num,
191 struct hubdev_info *hubdev)
193 struct cx_dev *cx_dev;
195 cx_dev = kcalloc(1, sizeof(struct cx_dev), GFP_KERNEL);
196 DBG("cx_dev= 0x%p\n", cx_dev);
200 cx_dev->cx_id.part_num = part_num;
201 cx_dev->cx_id.mfg_num = mfg_num;
202 cx_dev->cx_id.nasid = nasid;
203 cx_dev->hubdev = hubdev;
205 cx_dev->dev.parent = NULL;
206 cx_dev->dev.bus = &tiocx_bus_type;
207 cx_dev->dev.release = tiocx_bus_release;
208 snprintf(cx_dev->dev.bus_id, BUS_ID_SIZE, "%d",
209 cx_dev->cx_id.nasid);
210 device_register(&cx_dev->dev);
211 get_device(&cx_dev->dev);
213 device_create_file(&cx_dev->dev, &dev_attr_cxdev_control);
219 * cx_device_unregister - Unregister a device.
220 * @cx_dev: part/mfg id for the device
222 int cx_device_unregister(struct cx_dev *cx_dev)
224 put_device(&cx_dev->dev);
225 device_unregister(&cx_dev->dev);
230 * cx_device_reload - Reload the device.
231 * @nasid: device's nasid
232 * @part_num: device's part number
233 * @mfg_num: device's manufacturer number
235 * Remove the device associated with 'nasid' from device list and then
236 * call device-register with the given part/mfg numbers.
238 static int cx_device_reload(struct cx_dev *cx_dev)
240 cx_device_unregister(cx_dev);
241 return cx_device_register(cx_dev->cx_id.nasid, cx_dev->cx_id.part_num,
242 cx_dev->cx_id.mfg_num, cx_dev->hubdev);
245 static inline uint64_t tiocx_intr_alloc(nasid_t nasid, int widget,
247 int req_irq, nasid_t req_nasid,
250 struct ia64_sal_retval rv;
254 ia64_sal_oemcall_nolock(&rv, SN_SAL_IOIF_INTERRUPT,
255 SAL_INTR_ALLOC, nasid,
256 widget, sn_irq_info, req_irq,
257 req_nasid, req_slice);
261 static inline void tiocx_intr_free(nasid_t nasid, int widget,
262 struct sn_irq_info *sn_irq_info)
264 struct ia64_sal_retval rv;
268 ia64_sal_oemcall_nolock(&rv, SN_SAL_IOIF_INTERRUPT,
269 SAL_INTR_FREE, nasid,
270 widget, sn_irq_info->irq_irq,
271 sn_irq_info->irq_cookie, 0, 0);
274 struct sn_irq_info *tiocx_irq_alloc(nasid_t nasid, int widget, int irq,
275 nasid_t req_nasid, int slice)
277 struct sn_irq_info *sn_irq_info;
279 int sn_irq_size = sizeof(struct sn_irq_info);
281 if ((nasid & 1) == 0)
284 sn_irq_info = kmalloc(sn_irq_size, GFP_KERNEL);
285 if (sn_irq_info == NULL)
288 memset(sn_irq_info, 0x0, sn_irq_size);
290 status = tiocx_intr_alloc(nasid, widget, __pa(sn_irq_info), irq,
300 void tiocx_irq_free(struct sn_irq_info *sn_irq_info)
302 uint64_t bridge = (uint64_t) sn_irq_info->irq_bridge;
303 nasid_t nasid = NASID_GET(bridge);
307 widget = TIO_SWIN_WIDGETNUM(bridge);
308 tiocx_intr_free(nasid, widget, sn_irq_info);
313 uint64_t tiocx_dma_addr(uint64_t addr)
315 return PHYS_TO_TIODMA(addr);
318 uint64_t tiocx_swin_base(int nasid)
320 return TIO_SWIN_BASE(nasid, TIOCX_CORELET);
323 EXPORT_SYMBOL(cx_driver_register);
324 EXPORT_SYMBOL(cx_driver_unregister);
325 EXPORT_SYMBOL(cx_device_register);
326 EXPORT_SYMBOL(cx_device_unregister);
327 EXPORT_SYMBOL(tiocx_irq_alloc);
328 EXPORT_SYMBOL(tiocx_irq_free);
329 EXPORT_SYMBOL(tiocx_bus_type);
330 EXPORT_SYMBOL(tiocx_dma_addr);
331 EXPORT_SYMBOL(tiocx_swin_base);
333 static void tio_conveyor_set(nasid_t nasid, int enable_flag)
336 uint64_t disable_cb = (1ull << 61);
341 ice_frz = REMOTE_HUB_L(nasid, TIO_ICE_FRZ_CFG);
343 if (!(ice_frz & disable_cb)) /* already enabled */
345 ice_frz &= ~disable_cb;
347 if (ice_frz & disable_cb) /* already disabled */
349 ice_frz |= disable_cb;
351 DBG(KERN_ALERT "TIO_ICE_FRZ_CFG= 0x%lx\n", ice_frz);
352 REMOTE_HUB_S(nasid, TIO_ICE_FRZ_CFG, ice_frz);
355 #define tio_conveyor_enable(nasid) tio_conveyor_set(nasid, 1)
356 #define tio_conveyor_disable(nasid) tio_conveyor_set(nasid, 0)
358 static void tio_corelet_reset(nasid_t nasid, int corelet)
363 REMOTE_HUB_S(nasid, TIO_ICE_PMI_TX_CFG, 1 << corelet);
365 REMOTE_HUB_S(nasid, TIO_ICE_PMI_TX_CFG, 0);
369 static int tiocx_btchar_get(int nasid)
371 moduleid_t module_id;
375 cnodeid = nasid_to_cnodeid(nasid);
376 geoid = cnodeid_get_geoid(cnodeid);
377 module_id = geo_module(geoid);
378 return MODULE_GET_BTCHAR(module_id);
381 static int is_fpga_brick(int nasid)
383 switch (tiocx_btchar_get(nasid)) {
384 case L1_BRICKTYPE_SA:
385 case L1_BRICKTYPE_ATHENA:
386 case L1_BRICKTYPE_DAYTONA:
392 static int bitstream_loaded(nasid_t nasid)
396 cx_credits = REMOTE_HUB_L(nasid, TIO_ICE_PMI_TX_DYN_CREDIT_STAT_CB3);
397 cx_credits &= TIO_ICE_PMI_TX_DYN_CREDIT_STAT_CB3_CREDIT_CNT_MASK;
398 DBG("cx_credits= 0x%lx\n", cx_credits);
400 return (cx_credits == 0xf) ? 1 : 0;
403 static int tiocx_reload(struct cx_dev *cx_dev)
405 int part_num = CX_DEV_NONE;
406 int mfg_num = CX_DEV_NONE;
407 nasid_t nasid = cx_dev->cx_id.nasid;
409 if (bitstream_loaded(nasid)) {
413 *(volatile uint64_t *)(TIO_SWIN_BASE(nasid, TIOCX_CORELET) +
415 part_num = XWIDGET_PART_NUM(cx_id);
416 mfg_num = XWIDGET_MFG_NUM(cx_id);
417 DBG("part= 0x%x, mfg= 0x%x\n", part_num, mfg_num);
418 /* just ignore it if it's a CE */
419 if (part_num == TIO_CE_ASIC_PARTNUM)
423 cx_dev->cx_id.part_num = part_num;
424 cx_dev->cx_id.mfg_num = mfg_num;
427 * Delete old device and register the new one. It's ok if
428 * part_num/mfg_num == CX_DEV_NONE. We want to register
429 * devices in the table even if a bitstream isn't loaded.
430 * That allows use to see that a bitstream isn't loaded via
431 * TIOCX_IOCTL_DEV_LIST.
433 return cx_device_reload(cx_dev);
436 static ssize_t show_cxdev_control(struct device *dev, struct device_attribute *attr, char *buf)
438 struct cx_dev *cx_dev = to_cx_dev(dev);
440 return sprintf(buf, "0x%x 0x%x 0x%x %d\n",
442 cx_dev->cx_id.part_num, cx_dev->cx_id.mfg_num,
443 tiocx_btchar_get(cx_dev->cx_id.nasid));
446 static ssize_t store_cxdev_control(struct device *dev, struct device_attribute *attr, const char *buf,
450 struct cx_dev *cx_dev = to_cx_dev(dev);
452 if (!capable(CAP_SYS_ADMIN))
458 n = simple_strtoul(buf, NULL, 0);
462 tio_corelet_reset(cx_dev->cx_id.nasid, TIOCX_CORELET);
463 tiocx_reload(cx_dev);
466 tiocx_reload(cx_dev);
469 tio_corelet_reset(cx_dev->cx_id.nasid, TIOCX_CORELET);
478 DEVICE_ATTR(cxdev_control, 0644, show_cxdev_control, store_cxdev_control);
480 static int __init tiocx_init(void)
483 int found_tiocx_device = 0;
485 if (!ia64_platform_is("sn2"))
488 bus_register(&tiocx_bus_type);
490 for (cnodeid = 0; cnodeid < MAX_COMPACT_NODES; cnodeid++) {
493 if ((nasid = cnodeid_to_nasid(cnodeid)) < 0)
494 break; /* No more nasids .. bail out of loop */
496 if ((nasid & 0x1) && is_fpga_brick(nasid)) {
497 struct hubdev_info *hubdev;
498 struct xwidget_info *widgetp;
500 DBG("Found TIO at nasid 0x%x\n", nasid);
503 (struct hubdev_info *)(NODEPDA(cnodeid)->pdinfo);
505 widgetp = &hubdev->hdi_xwidget_info[TIOCX_CORELET];
507 /* The CE hangs off of the CX port but is not an FPGA */
508 if (widgetp->xwi_hwid.part_num == TIO_CE_ASIC_PARTNUM)
511 tio_corelet_reset(nasid, TIOCX_CORELET);
512 tio_conveyor_enable(nasid);
514 if (cx_device_register
515 (nasid, widgetp->xwi_hwid.part_num,
516 widgetp->xwi_hwid.mfg_num, hubdev) < 0)
519 found_tiocx_device++;
523 /* It's ok if we find zero devices. */
524 DBG("found_tiocx_device= %d\n", found_tiocx_device);
529 static int cx_remove_device(struct device * dev, void * data)
531 struct cx_dev *cx_dev = to_cx_dev(dev);
532 device_remove_file(dev, &dev_attr_cxdev_control);
533 cx_device_unregister(cx_dev);
537 static void __exit tiocx_exit(void)
542 * Unregister devices.
544 bus_for_each_dev(&tiocx_bus_type, NULL, NULL, cx_remove_device);
545 bus_unregister(&tiocx_bus_type);
548 subsys_initcall(tiocx_init);
549 module_exit(tiocx_exit);
551 /************************************************************************
552 * Module licensing and description
553 ************************************************************************/
554 MODULE_LICENSE("GPL");
555 MODULE_AUTHOR("Bruce Losure <blosure@sgi.com>");
556 MODULE_DESCRIPTION("TIOCX module");
557 MODULE_SUPPORTED_DEVICE(DEVICE_NAME);