Lines Matching +full:max +full:- +full:outbound +full:- +full:regions
1 // SPDX-License-Identifier: GPL-2.0
4 // Author: Cyrille Pitchen <cyrille.pitchen@free-electrons.com>
9 #include <linux/pci-epc.h>
14 #include "pcie-cadence.h"
21 * struct cdns_pcie_ep - private data for this PCIe endpoint controller driver
23 * @max_regions: maximum number of regions supported by hardware
24 * @ob_region_map: bitmask of mapped outbound regions
25 * @ob_addr: base addresses in the AXI bus where the outbound regions start
27 * dedicated outbound regions is mapped.
32 * dedicated outbound region.
34 * the MSI/legacy IRQ dedicated outbound region.
53 struct cdns_pcie *pcie = &ep->pcie; in cdns_pcie_ep_write_header()
55 cdns_pcie_ep_fn_writew(pcie, fn, PCI_DEVICE_ID, hdr->deviceid); in cdns_pcie_ep_write_header()
56 cdns_pcie_ep_fn_writeb(pcie, fn, PCI_REVISION_ID, hdr->revid); in cdns_pcie_ep_write_header()
57 cdns_pcie_ep_fn_writeb(pcie, fn, PCI_CLASS_PROG, hdr->progif_code); in cdns_pcie_ep_write_header()
59 hdr->subclass_code | hdr->baseclass_code << 8); in cdns_pcie_ep_write_header()
61 hdr->cache_line_size); in cdns_pcie_ep_write_header()
62 cdns_pcie_ep_fn_writew(pcie, fn, PCI_SUBSYSTEM_ID, hdr->subsys_id); in cdns_pcie_ep_write_header()
63 cdns_pcie_ep_fn_writeb(pcie, fn, PCI_INTERRUPT_PIN, hdr->interrupt_pin); in cdns_pcie_ep_write_header()
71 u32 id = CDNS_PCIE_LM_ID_VENDOR(hdr->vendorid) | in cdns_pcie_ep_write_header()
72 CDNS_PCIE_LM_ID_SUBSYS(hdr->subsys_vendor_id); in cdns_pcie_ep_write_header()
84 struct cdns_pcie *pcie = &ep->pcie; in cdns_pcie_ep_set_bar()
85 dma_addr_t bar_phys = epf_bar->phys_addr; in cdns_pcie_ep_set_bar()
86 enum pci_barno bar = epf_bar->barno; in cdns_pcie_ep_set_bar()
87 int flags = epf_bar->flags; in cdns_pcie_ep_set_bar()
92 sz = max_t(size_t, epf_bar->size, CDNS_PCIE_EP_MIN_APERTURE); in cdns_pcie_ep_set_bar()
97 sz = 1ULL << fls64(sz - 1); in cdns_pcie_ep_set_bar()
98 aperture = ilog2(sz) - 7; /* 128B -> 0, 256B -> 1, 512B -> 2, ... */ in cdns_pcie_ep_set_bar()
107 return -EINVAL; in cdns_pcie_ep_set_bar()
110 epf_bar->flags |= PCI_BASE_ADDRESS_MEM_TYPE_64; in cdns_pcie_ep_set_bar()
134 b = bar - BAR_4; in cdns_pcie_ep_set_bar()
151 struct cdns_pcie *pcie = &ep->pcie; in cdns_pcie_ep_clear_bar()
152 enum pci_barno bar = epf_bar->barno; in cdns_pcie_ep_clear_bar()
160 b = bar - BAR_4; in cdns_pcie_ep_clear_bar()
178 struct cdns_pcie *pcie = &ep->pcie; in cdns_pcie_ep_map_addr()
181 r = find_first_zero_bit(&ep->ob_region_map, in cdns_pcie_ep_map_addr()
182 sizeof(ep->ob_region_map) * BITS_PER_LONG); in cdns_pcie_ep_map_addr()
183 if (r >= ep->max_regions - 1) { in cdns_pcie_ep_map_addr()
184 dev_err(&epc->dev, "no free outbound region\n"); in cdns_pcie_ep_map_addr()
185 return -EINVAL; in cdns_pcie_ep_map_addr()
190 set_bit(r, &ep->ob_region_map); in cdns_pcie_ep_map_addr()
191 ep->ob_addr[r] = addr; in cdns_pcie_ep_map_addr()
200 struct cdns_pcie *pcie = &ep->pcie; in cdns_pcie_ep_unmap_addr()
203 for (r = 0; r < ep->max_regions - 1; r++) in cdns_pcie_ep_unmap_addr()
204 if (ep->ob_addr[r] == addr) in cdns_pcie_ep_unmap_addr()
207 if (r == ep->max_regions - 1) in cdns_pcie_ep_unmap_addr()
212 ep->ob_addr[r] = 0; in cdns_pcie_ep_unmap_addr()
213 clear_bit(r, &ep->ob_region_map); in cdns_pcie_ep_unmap_addr()
219 struct cdns_pcie *pcie = &ep->pcie; in cdns_pcie_ep_set_msi()
239 struct cdns_pcie *pcie = &ep->pcie; in cdns_pcie_ep_get_msi()
246 return -EINVAL; in cdns_pcie_ep_get_msi()
260 struct cdns_pcie *pcie = &ep->pcie; in cdns_pcie_ep_assert_intx()
267 /* Set the outbound region if needed. */ in cdns_pcie_ep_assert_intx()
268 if (unlikely(ep->irq_pci_addr != CDNS_PCIE_EP_IRQ_PCI_ADDR_LEGACY || in cdns_pcie_ep_assert_intx()
269 ep->irq_pci_fn != fn)) { in cdns_pcie_ep_assert_intx()
272 ep->irq_phys_addr); in cdns_pcie_ep_assert_intx()
273 ep->irq_pci_addr = CDNS_PCIE_EP_IRQ_PCI_ADDR_LEGACY; in cdns_pcie_ep_assert_intx()
274 ep->irq_pci_fn = fn; in cdns_pcie_ep_assert_intx()
278 ep->irq_pending |= BIT(intx); in cdns_pcie_ep_assert_intx()
281 ep->irq_pending &= ~BIT(intx); in cdns_pcie_ep_assert_intx()
286 if (((status & PCI_STATUS_INTERRUPT) != 0) ^ (ep->irq_pending != 0)) { in cdns_pcie_ep_assert_intx()
294 writel(0, ep->irq_cpu_addr + offset); in cdns_pcie_ep_assert_intx()
301 cmd = cdns_pcie_ep_fn_readw(&ep->pcie, fn, PCI_COMMAND); in cdns_pcie_ep_send_legacy_irq()
303 return -EINVAL; in cdns_pcie_ep_send_legacy_irq()
308 * from drivers/pci/dwc/pci-dra7xx.c in cdns_pcie_ep_send_legacy_irq()
318 struct cdns_pcie *pcie = &ep->pcie; in cdns_pcie_ep_send_msi_irq()
327 return -EINVAL; in cdns_pcie_ep_send_msi_irq()
333 return -EINVAL; in cdns_pcie_ep_send_msi_irq()
336 data_mask = msi_count - 1; in cdns_pcie_ep_send_msi_irq()
338 data = (data & ~data_mask) | ((interrupt_num - 1) & data_mask); in cdns_pcie_ep_send_msi_irq()
346 /* Set the outbound region if needed. */ in cdns_pcie_ep_send_msi_irq()
347 if (unlikely(ep->irq_pci_addr != (pci_addr & ~pci_addr_mask) || in cdns_pcie_ep_send_msi_irq()
348 ep->irq_pci_fn != fn)) { in cdns_pcie_ep_send_msi_irq()
352 ep->irq_phys_addr, in cdns_pcie_ep_send_msi_irq()
355 ep->irq_pci_addr = (pci_addr & ~pci_addr_mask); in cdns_pcie_ep_send_msi_irq()
356 ep->irq_pci_fn = fn; in cdns_pcie_ep_send_msi_irq()
358 writel(data, ep->irq_cpu_addr + (pci_addr & pci_addr_mask)); in cdns_pcie_ep_send_msi_irq()
380 return -EINVAL; in cdns_pcie_ep_raise_irq()
386 struct cdns_pcie *pcie = &ep->pcie; in cdns_pcie_ep_start()
395 list_for_each_entry(epf, &epc->pci_epf, list) in cdns_pcie_ep_start()
396 cfg |= BIT(epf->func_no); in cdns_pcie_ep_start()
406 * we've already locked the epc->lock. in cdns_pcie_ep_start()
408 list_for_each_entry(epf, &epc->pci_epf, list) in cdns_pcie_ep_start()
427 { .compatible = "cdns,cdns-pcie-ep" },
434 struct device *dev = &pdev->dev; in cdns_pcie_ep_probe()
435 struct device_node *np = dev->of_node; in cdns_pcie_ep_probe()
445 return -ENOMEM; in cdns_pcie_ep_probe()
447 pcie = &ep->pcie; in cdns_pcie_ep_probe()
448 pcie->is_rc = false; in cdns_pcie_ep_probe()
451 pcie->reg_base = devm_ioremap_resource(dev, res); in cdns_pcie_ep_probe()
452 if (IS_ERR(pcie->reg_base)) { in cdns_pcie_ep_probe()
454 return PTR_ERR(pcie->reg_base); in cdns_pcie_ep_probe()
460 return -EINVAL; in cdns_pcie_ep_probe()
462 pcie->mem_res = res; in cdns_pcie_ep_probe()
464 ret = of_property_read_u32(np, "cdns,max-outbound-regions", in cdns_pcie_ep_probe()
465 &ep->max_regions); in cdns_pcie_ep_probe()
467 dev_err(dev, "missing \"cdns,max-outbound-regions\"\n"); in cdns_pcie_ep_probe()
470 ep->ob_addr = devm_kcalloc(dev, in cdns_pcie_ep_probe()
471 ep->max_regions, sizeof(*ep->ob_addr), in cdns_pcie_ep_probe()
473 if (!ep->ob_addr) in cdns_pcie_ep_probe()
474 return -ENOMEM; in cdns_pcie_ep_probe()
501 if (of_property_read_u8(np, "max-functions", &epc->max_functions) < 0) in cdns_pcie_ep_probe()
502 epc->max_functions = 1; in cdns_pcie_ep_probe()
504 ret = pci_epc_mem_init(epc, pcie->mem_res->start, in cdns_pcie_ep_probe()
505 resource_size(pcie->mem_res)); in cdns_pcie_ep_probe()
511 ep->irq_cpu_addr = pci_epc_mem_alloc_addr(epc, &ep->irq_phys_addr, in cdns_pcie_ep_probe()
513 if (!ep->irq_cpu_addr) { in cdns_pcie_ep_probe()
515 ret = -ENOMEM; in cdns_pcie_ep_probe()
518 ep->irq_pci_addr = CDNS_PCIE_EP_IRQ_PCI_ADDR_NONE; in cdns_pcie_ep_probe()
520 set_bit(0, &ep->ob_region_map); in cdns_pcie_ep_probe()
533 phy_count = pcie->phy_count; in cdns_pcie_ep_probe()
534 while (phy_count--) in cdns_pcie_ep_probe()
535 device_link_del(pcie->link[phy_count]); in cdns_pcie_ep_probe()
542 struct device *dev = &pdev->dev; in cdns_pcie_ep_shutdown()
557 .name = "cdns-pcie-ep",