Lines Matching +full:msi +full:- +full:parent
1 // SPDX-License-Identifier: GPL-2.0-only
3 * Freescale SCFG MSI(-X) support
12 #include <linux/msi.h>
21 #include <linux/dma-iommu.h>
48 struct irq_domain *parent; member
60 .name = "MSI",
76 if (p && strncmp(p, "no-affinity", 11) == 0) in early_parse_ls_scfg_msi()
89 msg->address_hi = upper_32_bits(msi_data->msiir_addr); in ls_scfg_msi_compose_msg()
90 msg->address_lo = lower_32_bits(msi_data->msiir_addr); in ls_scfg_msi_compose_msg()
91 msg->data = data->hwirq; in ls_scfg_msi_compose_msg()
97 msg->data |= cpumask_first(mask); in ls_scfg_msi_compose_msg()
110 return -EINVAL; in ls_scfg_msi_set_affinity()
117 if (cpu >= msi_data->msir_num) in ls_scfg_msi_set_affinity()
118 return -EINVAL; in ls_scfg_msi_set_affinity()
120 if (msi_data->msir[cpu].gic_irq <= 0) { in ls_scfg_msi_set_affinity()
122 return -EINVAL; in ls_scfg_msi_set_affinity()
142 struct ls_scfg_msi *msi_data = domain->host_data; in ls_scfg_msi_domain_irq_alloc()
147 spin_lock(&msi_data->lock); in ls_scfg_msi_domain_irq_alloc()
148 pos = find_first_zero_bit(msi_data->used, msi_data->irqs_num); in ls_scfg_msi_domain_irq_alloc()
149 if (pos < msi_data->irqs_num) in ls_scfg_msi_domain_irq_alloc()
150 __set_bit(pos, msi_data->used); in ls_scfg_msi_domain_irq_alloc()
152 err = -ENOSPC; in ls_scfg_msi_domain_irq_alloc()
153 spin_unlock(&msi_data->lock); in ls_scfg_msi_domain_irq_alloc()
158 err = iommu_dma_prepare_msi(info->desc, msi_data->msiir_addr); in ls_scfg_msi_domain_irq_alloc()
176 pos = d->hwirq; in ls_scfg_msi_domain_irq_free()
177 if (pos < 0 || pos >= msi_data->irqs_num) { in ls_scfg_msi_domain_irq_free()
178 pr_err("failed to teardown msi. Invalid hwirq %d\n", pos); in ls_scfg_msi_domain_irq_free()
182 spin_lock(&msi_data->lock); in ls_scfg_msi_domain_irq_free()
183 __clear_bit(pos, msi_data->used); in ls_scfg_msi_domain_irq_free()
184 spin_unlock(&msi_data->lock); in ls_scfg_msi_domain_irq_free()
195 struct ls_scfg_msi *msi_data = msir->msi_data; in ls_scfg_msi_irq_handler()
201 val = ioread32be(msir->reg); in ls_scfg_msi_irq_handler()
203 pos = msir->bit_start; in ls_scfg_msi_irq_handler()
204 size = msir->bit_end + 1; in ls_scfg_msi_irq_handler()
207 hwirq = ((msir->bit_end - pos) << msi_data->cfg->ibs_shift) | in ls_scfg_msi_irq_handler()
208 msir->srs; in ls_scfg_msi_irq_handler()
209 virq = irq_find_mapping(msi_data->parent, hwirq); in ls_scfg_msi_irq_handler()
219 /* Initialize MSI domain parent */ in ls_scfg_msi_domains_init()
220 msi_data->parent = irq_domain_add_linear(NULL, in ls_scfg_msi_domains_init()
221 msi_data->irqs_num, in ls_scfg_msi_domains_init()
224 if (!msi_data->parent) { in ls_scfg_msi_domains_init()
225 dev_err(&msi_data->pdev->dev, "failed to create IRQ domain\n"); in ls_scfg_msi_domains_init()
226 return -ENOMEM; in ls_scfg_msi_domains_init()
229 msi_data->msi_domain = pci_msi_create_irq_domain( in ls_scfg_msi_domains_init()
230 of_node_to_fwnode(msi_data->pdev->dev.of_node), in ls_scfg_msi_domains_init()
232 msi_data->parent); in ls_scfg_msi_domains_init()
233 if (!msi_data->msi_domain) { in ls_scfg_msi_domains_init()
234 dev_err(&msi_data->pdev->dev, "failed to create MSI domain\n"); in ls_scfg_msi_domains_init()
235 irq_domain_remove(msi_data->parent); in ls_scfg_msi_domains_init()
236 return -ENOMEM; in ls_scfg_msi_domains_init()
247 virq = platform_get_irq(msi_data->pdev, index); in ls_scfg_msi_setup_hwirq()
249 return -ENODEV; in ls_scfg_msi_setup_hwirq()
251 msir = &msi_data->msir[index]; in ls_scfg_msi_setup_hwirq()
252 msir->index = index; in ls_scfg_msi_setup_hwirq()
253 msir->msi_data = msi_data; in ls_scfg_msi_setup_hwirq()
254 msir->gic_irq = virq; in ls_scfg_msi_setup_hwirq()
255 msir->reg = msi_data->regs + msi_data->cfg->msir_base + 4 * index; in ls_scfg_msi_setup_hwirq()
257 if (msi_data->cfg->msir_irqs == MSI_LS1043V1_1_IRQS_PER_MSIR) { in ls_scfg_msi_setup_hwirq()
258 msir->bit_start = 32 - ((msir->index + 1) * in ls_scfg_msi_setup_hwirq()
260 msir->bit_end = msir->bit_start + in ls_scfg_msi_setup_hwirq()
261 MSI_LS1043V1_1_IRQS_PER_MSIR - 1; in ls_scfg_msi_setup_hwirq()
263 msir->bit_start = 0; in ls_scfg_msi_setup_hwirq()
264 msir->bit_end = msi_data->cfg->msir_irqs - 1; in ls_scfg_msi_setup_hwirq()
267 irq_set_chained_handler_and_data(msir->gic_irq, in ls_scfg_msi_setup_hwirq()
273 irq_set_affinity(msir->gic_irq, get_cpu_mask(index)); in ls_scfg_msi_setup_hwirq()
274 msir->srs = 0; /* This value is determined by the CPU */ in ls_scfg_msi_setup_hwirq()
276 msir->srs = index; in ls_scfg_msi_setup_hwirq()
279 if (!msi_affinity_flag || msir->index == 0) { in ls_scfg_msi_setup_hwirq()
280 for (i = 0; i < msi_data->cfg->msir_irqs; i++) { in ls_scfg_msi_setup_hwirq()
281 hwirq = i << msi_data->cfg->ibs_shift | msir->index; in ls_scfg_msi_setup_hwirq()
282 bitmap_clear(msi_data->used, hwirq, 1); in ls_scfg_msi_setup_hwirq()
291 struct ls_scfg_msi *msi_data = msir->msi_data; in ls_scfg_msi_teardown_hwirq()
294 if (msir->gic_irq > 0) in ls_scfg_msi_teardown_hwirq()
295 irq_set_chained_handler_and_data(msir->gic_irq, NULL, NULL); in ls_scfg_msi_teardown_hwirq()
297 for (i = 0; i < msi_data->cfg->msir_irqs; i++) { in ls_scfg_msi_teardown_hwirq()
298 hwirq = i << msi_data->cfg->ibs_shift | msir->index; in ls_scfg_msi_teardown_hwirq()
299 bitmap_set(msi_data->used, hwirq, 1); in ls_scfg_msi_teardown_hwirq()
325 { .compatible = "fsl,1s1021a-msi", .data = &ls1021_msi_cfg},
326 { .compatible = "fsl,1s1043a-msi", .data = &ls1021_msi_cfg},
328 { .compatible = "fsl,ls1012a-msi", .data = &ls1021_msi_cfg },
329 { .compatible = "fsl,ls1021a-msi", .data = &ls1021_msi_cfg },
330 { .compatible = "fsl,ls1043a-msi", .data = &ls1021_msi_cfg },
331 { .compatible = "fsl,ls1043a-v1.1-msi", .data = &ls1043_v1_1_msi_cfg },
332 { .compatible = "fsl,ls1046a-msi", .data = &ls1046_msi_cfg },
344 match = of_match_device(ls_scfg_msi_id, &pdev->dev); in ls_scfg_msi_probe()
346 return -ENODEV; in ls_scfg_msi_probe()
348 msi_data = devm_kzalloc(&pdev->dev, sizeof(*msi_data), GFP_KERNEL); in ls_scfg_msi_probe()
350 return -ENOMEM; in ls_scfg_msi_probe()
352 msi_data->cfg = (struct ls_scfg_msi_cfg *) match->data; in ls_scfg_msi_probe()
355 msi_data->regs = devm_ioremap_resource(&pdev->dev, res); in ls_scfg_msi_probe()
356 if (IS_ERR(msi_data->regs)) { in ls_scfg_msi_probe()
357 dev_err(&pdev->dev, "failed to initialize 'regs'\n"); in ls_scfg_msi_probe()
358 return PTR_ERR(msi_data->regs); in ls_scfg_msi_probe()
360 msi_data->msiir_addr = res->start; in ls_scfg_msi_probe()
362 msi_data->pdev = pdev; in ls_scfg_msi_probe()
363 spin_lock_init(&msi_data->lock); in ls_scfg_msi_probe()
365 msi_data->irqs_num = MSI_IRQS_PER_MSIR * in ls_scfg_msi_probe()
366 (1 << msi_data->cfg->ibs_shift); in ls_scfg_msi_probe()
367 msi_data->used = devm_kcalloc(&pdev->dev, in ls_scfg_msi_probe()
368 BITS_TO_LONGS(msi_data->irqs_num), in ls_scfg_msi_probe()
369 sizeof(*msi_data->used), in ls_scfg_msi_probe()
371 if (!msi_data->used) in ls_scfg_msi_probe()
372 return -ENOMEM; in ls_scfg_msi_probe()
377 bitmap_set(msi_data->used, 0, msi_data->irqs_num); in ls_scfg_msi_probe()
379 msi_data->msir_num = of_irq_count(pdev->dev.of_node); in ls_scfg_msi_probe()
385 if (msi_data->msir_num >= cpu_num) in ls_scfg_msi_probe()
386 msi_data->msir_num = cpu_num; in ls_scfg_msi_probe()
391 msi_data->msir = devm_kcalloc(&pdev->dev, msi_data->msir_num, in ls_scfg_msi_probe()
392 sizeof(*msi_data->msir), in ls_scfg_msi_probe()
394 if (!msi_data->msir) in ls_scfg_msi_probe()
395 return -ENOMEM; in ls_scfg_msi_probe()
397 for (i = 0; i < msi_data->msir_num; i++) in ls_scfg_msi_probe()
414 for (i = 0; i < msi_data->msir_num; i++) in ls_scfg_msi_remove()
415 ls_scfg_msi_teardown_hwirq(&msi_data->msir[i]); in ls_scfg_msi_remove()
417 irq_domain_remove(msi_data->msi_domain); in ls_scfg_msi_remove()
418 irq_domain_remove(msi_data->parent); in ls_scfg_msi_remove()
427 .name = "ls-scfg-msi",
437 MODULE_DESCRIPTION("Freescale Layerscape SCFG MSI controller driver");