1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Copyright 2015 IBM Corp.
6 #include <linux/kernel.h>
7 #include <linux/module.h>
8 #include <linux/platform_device.h>
9 #include <linux/slab.h>
10 #include <linux/of_address.h>
11 #include <linux/of_platform.h>
16 static const __be32 *read_prop_string(const struct device_node *np,
17 const char *prop_name)
21 prop = of_get_property(np, prop_name, NULL);
22 if (cxl_verbose && prop)
23 pr_info("%s: %s\n", prop_name, (char *) prop);
27 static const __be32 *read_prop_dword(const struct device_node *np,
28 const char *prop_name, u32 *val)
32 prop = of_get_property(np, prop_name, NULL);
34 *val = be32_to_cpu(prop[0]);
35 if (cxl_verbose && prop)
36 pr_info("%s: %#x (%u)\n", prop_name, *val, *val);
40 static const __be64 *read_prop64_dword(const struct device_node *np,
41 const char *prop_name, u64 *val)
45 prop = of_get_property(np, prop_name, NULL);
47 *val = be64_to_cpu(prop[0]);
48 if (cxl_verbose && prop)
49 pr_info("%s: %#llx (%llu)\n", prop_name, *val, *val);
54 static int read_handle(struct device_node *np, u64 *handle)
59 /* Get address and size of the node */
60 prop = of_get_address(np, 0, &size, NULL);
64 /* Helper to read a big number; size is in cells (not bytes) */
65 *handle = of_read_number(prop, of_n_addr_cells(np));
69 static int read_phys_addr(struct device_node *np, char *prop_name,
72 int i, len, entry_size, naddr, nsize, type;
76 naddr = of_n_addr_cells(np);
77 nsize = of_n_size_cells(np);
79 prop = of_get_property(np, prop_name, &len);
81 entry_size = naddr + nsize;
82 for (i = 0; i < (len / 4); i += entry_size, prop += entry_size) {
83 type = be32_to_cpu(prop[0]);
84 addr = of_read_number(prop, naddr);
85 size = of_read_number(&prop[naddr], nsize);
87 case 0: /* unit address */
88 afu->guest->handle = addr;
91 afu->guest->p2n_phys += addr;
92 afu->guest->p2n_size = size;
94 case 2: /* problem state area */
95 afu->psn_phys += addr;
96 afu->adapter->ps_size = size;
99 pr_err("Invalid address type %d found in %s property of AFU\n",
104 pr_info("%s: %#x %#llx (size %#llx)\n",
105 prop_name, type, addr, size);
111 static int read_vpd(struct cxl *adapter, struct cxl_afu *afu)
115 size_t len = sizeof(vpd);
120 rc = cxl_guest_read_adapter_vpd(adapter, vpd, len);
122 rc = cxl_guest_read_afu_vpd(afu, vpd, len);
125 cxl_dump_debug_buffer(vpd, rc);
131 int cxl_of_read_afu_handle(struct cxl_afu *afu, struct device_node *afu_np)
133 if (read_handle(afu_np, &afu->guest->handle))
135 pr_devel("AFU handle: 0x%.16llx\n", afu->guest->handle);
140 int cxl_of_read_afu_properties(struct cxl_afu *afu, struct device_node *np)
145 u16 device_id, vendor_id;
146 u32 val = 0, class_code;
148 /* Properties are read in the same order as listed in PAPR */
151 pr_info("Dump of the 'ibm,coherent-platform-function' node properties:\n");
153 prop = of_get_property(np, "compatible", &len);
156 p = (char *) prop + i;
157 pr_info("compatible: %s\n", p);
160 read_prop_string(np, "name");
163 rc = read_phys_addr(np, "reg", afu);
167 rc = read_phys_addr(np, "assigned-addresses", afu);
171 if (afu->psn_phys == 0)
177 read_prop_string(np, "ibm,loc-code");
178 read_prop_string(np, "device_type");
181 read_prop_dword(np, "ibm,#processes", &afu->max_procs_virtualised);
184 read_prop_dword(np, "ibm,scratchpad-size", &val);
185 read_prop_dword(np, "ibm,programmable", &val);
186 read_prop_string(np, "ibm,phandle");
190 read_prop_dword(np, "ibm,max-ints-per-process", &afu->guest->max_ints);
191 afu->irqs_max = afu->guest->max_ints;
193 prop = read_prop_dword(np, "ibm,min-ints-per-process", &afu->pp_irqs);
195 /* One extra interrupt for the PSL interrupt is already
196 * included. Remove it now to keep only AFU interrupts and
197 * match the native case.
203 read_prop_dword(np, "ibm,max-ints", &val);
204 read_prop_dword(np, "ibm,vpd-size", &val);
207 read_prop64_dword(np, "ibm,error-buffer-size", &afu->eb_len);
211 read_prop_dword(np, "ibm,config-record-type", &val);
213 read_prop64_dword(np, "ibm,config-record-size", &afu->crs_len);
216 read_prop_dword(np, "ibm,#config-records", &afu->crs_num);
219 for (i = 0; i < afu->crs_num; i++) {
220 rc = cxl_ops->afu_cr_read16(afu, i, PCI_DEVICE_ID,
223 pr_info("record %d - device-id: %#x\n",
225 rc = cxl_ops->afu_cr_read16(afu, i, PCI_VENDOR_ID,
228 pr_info("record %d - vendor-id: %#x\n",
230 rc = cxl_ops->afu_cr_read32(afu, i, PCI_CLASS_REVISION,
234 pr_info("record %d - class-code: %#x\n",
239 read_prop_dword(np, "ibm,function-number", &val);
240 read_prop_dword(np, "ibm,privileged-function", &val);
241 read_prop_dword(np, "vendor-id", &val);
242 read_prop_dword(np, "device-id", &val);
243 read_prop_dword(np, "revision-id", &val);
244 read_prop_dword(np, "class-code", &val);
245 read_prop_dword(np, "subsystem-vendor-id", &val);
246 read_prop_dword(np, "subsystem-id", &val);
249 * if "ibm,process-mmio" doesn't exist then per-process mmio is
253 prop = read_prop_dword(np, "ibm,process-mmio", &val);
254 if (prop && val == 1)
260 read_prop_dword(np, "ibm,supports-aur", &val);
261 read_prop_dword(np, "ibm,supports-csrp", &val);
262 read_prop_dword(np, "ibm,supports-prr", &val);
265 prop = read_prop_dword(np, "ibm,function-error-interrupt", &val);
267 afu->serr_hwirq = val;
269 pr_devel("AFU handle: %#llx\n", afu->guest->handle);
270 pr_devel("p2n_phys: %#llx (size %#llx)\n",
271 afu->guest->p2n_phys, afu->guest->p2n_size);
272 pr_devel("psn_phys: %#llx (size %#llx)\n",
273 afu->psn_phys, afu->adapter->ps_size);
274 pr_devel("Max number of processes virtualised=%i\n",
275 afu->max_procs_virtualised);
276 pr_devel("Per-process irqs min=%i, max=%i\n", afu->pp_irqs,
278 pr_devel("Slice error interrupt=%#lx\n", afu->serr_hwirq);
283 static int read_adapter_irq_config(struct cxl *adapter, struct device_node *np)
285 const __be32 *ranges;
287 struct irq_avail *cur;
289 ranges = of_get_property(np, "interrupt-ranges", &len);
290 if (ranges == NULL || len < (2 * sizeof(int)))
294 * encoded array of two cells per entry, each cell encoded as
297 nranges = len / (2 * sizeof(int));
298 if (nranges == 0 || (nranges * 2 * sizeof(int)) != len)
301 adapter->guest->irq_avail = kcalloc(nranges, sizeof(struct irq_avail),
303 if (adapter->guest->irq_avail == NULL)
306 adapter->guest->irq_base_offset = be32_to_cpu(ranges[0]);
307 for (i = 0; i < nranges; i++) {
308 cur = &adapter->guest->irq_avail[i];
309 cur->offset = be32_to_cpu(ranges[i * 2]);
310 cur->range = be32_to_cpu(ranges[i * 2 + 1]);
311 cur->bitmap = kcalloc(BITS_TO_LONGS(cur->range),
312 sizeof(*cur->bitmap), GFP_KERNEL);
313 if (cur->bitmap == NULL)
315 if (cur->offset < adapter->guest->irq_base_offset)
316 adapter->guest->irq_base_offset = cur->offset;
318 pr_info("available IRQ range: %#lx-%#lx (%lu)\n",
319 cur->offset, cur->offset + cur->range - 1,
322 adapter->guest->irq_nranges = nranges;
323 spin_lock_init(&adapter->guest->irq_alloc_lock);
327 for (i--; i >= 0; i--) {
328 cur = &adapter->guest->irq_avail[i];
331 kfree(adapter->guest->irq_avail);
332 adapter->guest->irq_avail = NULL;
336 int cxl_of_read_adapter_handle(struct cxl *adapter, struct device_node *np)
338 if (read_handle(np, &adapter->guest->handle))
340 pr_devel("Adapter handle: 0x%.16llx\n", adapter->guest->handle);
345 int cxl_of_read_adapter_properties(struct cxl *adapter, struct device_node *np)
347 int rc, len, naddr, i;
352 /* Properties are read in the same order as listed in PAPR */
354 naddr = of_n_addr_cells(np);
357 pr_info("Dump of the 'ibm,coherent-platform-facility' node properties:\n");
359 read_prop_dword(np, "#address-cells", &val);
360 read_prop_dword(np, "#size-cells", &val);
362 prop = of_get_property(np, "compatible", &len);
365 p = (char *) prop + i;
366 pr_info("compatible: %s\n", p);
369 read_prop_string(np, "name");
370 read_prop_string(np, "model");
372 prop = of_get_property(np, "reg", NULL);
374 pr_info("reg: addr:%#llx size:%#x\n",
375 of_read_number(prop, naddr),
376 be32_to_cpu(prop[naddr]));
379 read_prop_string(np, "ibm,loc-code");
382 if ((rc = read_adapter_irq_config(adapter, np)))
386 read_prop_string(np, "device_type");
387 read_prop_string(np, "ibm,phandle");
390 prop = read_prop_dword(np, "ibm,caia-version", &val);
392 adapter->caia_major = (val & 0xFF00) >> 8;
393 adapter->caia_minor = val & 0xFF;
396 prop = read_prop_dword(np, "ibm,psl-revision", &val);
398 adapter->psl_rev = val;
400 prop = read_prop_string(np, "status");
402 adapter->guest->status = kasprintf(GFP_KERNEL, "%s", (char *) prop);
403 if (adapter->guest->status == NULL)
407 prop = read_prop_dword(np, "vendor-id", &val);
409 adapter->guest->vendor = val;
411 prop = read_prop_dword(np, "device-id", &val);
413 adapter->guest->device = val;
416 read_prop_dword(np, "ibm,privileged-facility", &val);
417 read_prop_dword(np, "revision-id", &val);
418 read_prop_dword(np, "class-code", &val);
421 prop = read_prop_dword(np, "subsystem-vendor-id", &val);
423 adapter->guest->subsystem_vendor = val;
425 prop = read_prop_dword(np, "subsystem-id", &val);
427 adapter->guest->subsystem = val;
430 read_vpd(adapter, NULL);
435 static int cxl_of_remove(struct platform_device *pdev)
440 adapter = dev_get_drvdata(&pdev->dev);
441 for (afu = 0; afu < adapter->slices; afu++)
442 cxl_guest_remove_afu(adapter->afu[afu]);
444 cxl_guest_remove_adapter(adapter);
448 static void cxl_of_shutdown(struct platform_device *pdev)
453 int cxl_of_probe(struct platform_device *pdev)
455 struct device_node *np = NULL;
456 struct device_node *afu_np = NULL;
457 struct cxl *adapter = NULL;
459 int slice = 0, slice_ok = 0;
461 pr_devel("in %s\n", __func__);
463 np = pdev->dev.of_node;
468 adapter = cxl_guest_init_adapter(np, pdev);
469 if (IS_ERR(adapter)) {
470 dev_err(&pdev->dev, "guest_init_adapter failed: %li\n", PTR_ERR(adapter));
471 return PTR_ERR(adapter);
475 for_each_child_of_node(np, afu_np) {
476 if ((ret = cxl_guest_init_afu(adapter, slice, afu_np)))
477 dev_err(&pdev->dev, "AFU %i failed to initialise: %i\n",
485 dev_info(&pdev->dev, "No active AFU");
492 static const struct of_device_id cxl_of_match[] = {
493 { .compatible = "ibm,coherent-platform-facility",},
496 MODULE_DEVICE_TABLE(of, cxl_of_match);
498 struct platform_driver cxl_of_driver = {
501 .of_match_table = cxl_of_match,
504 .probe = cxl_of_probe,
505 .remove = cxl_of_remove,
506 .shutdown = cxl_of_shutdown,