1 // SPDX-License-Identifier: GPL-2.0
42 	device = dasd_device_from_devindex((unsigned long) v - 1);  in dasd_devices_show()
45 	if (device->block)  in dasd_devices_show()
46 		block = device->block;  in dasd_devices_show()
52 	seq_printf(m, "%s", dev_name(&device->cdev->dev));  in dasd_devices_show()
54 	if (device->discipline != NULL)  in dasd_devices_show()
55 		seq_printf(m, "(%s)", device->discipline->name);  in dasd_devices_show()
59 	if (block->gdp)  in dasd_devices_show()
61 			   MAJOR(disk_devt(block->gdp)),  in dasd_devices_show()
62 			   MINOR(disk_devt(block->gdp)));  in dasd_devices_show()
66 	if (block->gdp)  in dasd_devices_show()
67 		seq_printf(m, " is %-8s", block->gdp->disk_name);  in dasd_devices_show()
71 	substr = (device->features & DASD_FEATURE_READONLY) ? "(ro)" : " ";  in dasd_devices_show()
74 	switch (device->state) {  in dasd_devices_show()
90 		if (dasd_check_blocksize(block->bp_block))  in dasd_devices_show()
91 			seq_printf(m, "n/f	 ");  in dasd_devices_show()
95 				   block->bp_block, block->blocks,  in dasd_devices_show()
96 				   ((block->bp_block >> 9) *  in dasd_devices_show()
97 				    block->blocks) >> 11);  in dasd_devices_show()
106 	seq_printf(m, "\n");  in dasd_devices_show()
145 		if (device->block)  in dasd_stats_all_block_on()
146 			rc = dasd_profile_on(&device->block->profile);  in dasd_stats_all_block_on()
163 		if (device->block)  in dasd_stats_all_block_off()
164 			dasd_profile_off(&device->block->profile);  in dasd_stats_all_block_off()
178 		if (device->block)  in dasd_stats_all_block_reset()
179 			dasd_profile_reset(&device->block->profile);  in dasd_stats_all_block_reset()
184 static void dasd_statistics_array(struct seq_file *m, unsigned int *array, int factor)  in dasd_statistics_array()  argument
189 		seq_printf(m, "%7d ", array[i] / factor);  in dasd_statistics_array()
191 			seq_putc(m, '\n');  in dasd_statistics_array()
193 	seq_putc(m, '\n');  in dasd_statistics_array()
201 	int factor;  in dasd_stats_proc_show()  local
207 		seq_printf(m, "Statistics are off - they might be "  in dasd_stats_proc_show()
209 				    "/proc/dasd/statistics'\n");  in dasd_stats_proc_show()
214 	for (factor = 1; (prof->dasd_io_reqs / factor) > 9999999;  in dasd_stats_proc_show()
215 	     factor *= 10);  in dasd_stats_proc_show()
217 	seq_printf(m, "%d dasd I/O requests\n", prof->dasd_io_reqs);  in dasd_stats_proc_show()
218 	seq_printf(m, "with %u sectors(512B each)\n",  in dasd_stats_proc_show()
219 		       prof->dasd_io_sects);  in dasd_stats_proc_show()
220 	seq_printf(m, "Scale Factor is  %d\n", factor);  in dasd_stats_proc_show()
224 		       "   _16k	   _32k	   _64k	   128k\n");  in dasd_stats_proc_show()
228 		       "   __1G	   __2G	   __4G " "   _>4G\n");  in dasd_stats_proc_show()
230 	seq_printf(m, "Histogram of sizes (512B secs)\n");  in dasd_stats_proc_show()
231 	dasd_statistics_array(m, prof->dasd_io_secs, factor);  in dasd_stats_proc_show()
232 	seq_printf(m, "Histogram of I/O times (microseconds)\n");  in dasd_stats_proc_show()
233 	dasd_statistics_array(m, prof->dasd_io_times, factor);  in dasd_stats_proc_show()
234 	seq_printf(m, "Histogram of I/O times per sector\n");  in dasd_stats_proc_show()
235 	dasd_statistics_array(m, prof->dasd_io_timps, factor);  in dasd_stats_proc_show()
236 	seq_printf(m, "Histogram of I/O time till ssch\n");  in dasd_stats_proc_show()
237 	dasd_statistics_array(m, prof->dasd_io_time1, factor);  in dasd_stats_proc_show()
238 	seq_printf(m, "Histogram of I/O time between ssch and irq\n");  in dasd_stats_proc_show()
239 	dasd_statistics_array(m, prof->dasd_io_time2, factor);  in dasd_stats_proc_show()
241 			    "and irq per sector\n");  in dasd_stats_proc_show()
242 	dasd_statistics_array(m, prof->dasd_io_time2ps, factor);  in dasd_stats_proc_show()
243 	seq_printf(m, "Histogram of I/O time between irq and end\n");  in dasd_stats_proc_show()
244 	dasd_statistics_array(m, prof->dasd_io_time3, factor);  in dasd_stats_proc_show()
245 	seq_printf(m, "# of req in chanq at enqueuing (1..32) \n");  in dasd_stats_proc_show()
246 	dasd_statistics_array(m, prof->dasd_io_nr_req, factor);  in dasd_stats_proc_show()
249 	seq_printf(m, "Statistics are not activated in this kernel\n");  in dasd_stats_proc_show()
292 				"on\n");  in dasd_stats_proc_write()
299 				"off\n");  in dasd_stats_proc_write()
306 		pr_info("The statistics have been reset\n");  in dasd_stats_proc_write()
312 	rc = -EINVAL;  in dasd_stats_proc_write()
313 	pr_warn("%s is not a supported value for /proc/dasd/statistics\n", str);  in dasd_stats_proc_write()
318 	pr_warn("/proc/dasd/statistics: is not activated in this kernel\n");  in dasd_stats_proc_write()
332  * Create dasd proc-fs entries.
333  * In case creation failed, cleanup and return -ENOENT.
359 	return -ENOENT;  in dasd_proc_init()