Lines Matching full:iommu
3 * IOMMU API for Rockchip
17 #include <linux/iommu.h>
92 /* list of clocks required by IOMMU */
114 struct iommu_device iommu; member
116 struct iommu_domain *domain; /* domain to which iommu is attached */
121 struct device_link *link; /* runtime PM link from IOMMU to master */
122 struct rk_iommu *iommu; member
142 * The Rockchip rk3288 iommu uses a 2-level page table.
151 * Each iommu device has a MMU_DTE_ADDR register that contains the physical
306 * rk3288 iova (IOMMU Virtual Address) format
347 static void rk_iommu_command(struct rk_iommu *iommu, u32 command) in rk_iommu_command() argument
351 for (i = 0; i < iommu->num_mmu; i++) in rk_iommu_command()
352 writel(command, iommu->bases[i] + RK_MMU_COMMAND); in rk_iommu_command()
359 static void rk_iommu_zap_lines(struct rk_iommu *iommu, dma_addr_t iova_start, in rk_iommu_zap_lines() argument
368 for (i = 0; i < iommu->num_mmu; i++) { in rk_iommu_zap_lines()
372 rk_iommu_write(iommu->bases[i], RK_MMU_ZAP_ONE_LINE, iova); in rk_iommu_zap_lines()
376 static bool rk_iommu_is_stall_active(struct rk_iommu *iommu) in rk_iommu_is_stall_active() argument
381 for (i = 0; i < iommu->num_mmu; i++) in rk_iommu_is_stall_active()
382 active &= !!(rk_iommu_read(iommu->bases[i], RK_MMU_STATUS) & in rk_iommu_is_stall_active()
388 static bool rk_iommu_is_paging_enabled(struct rk_iommu *iommu) in rk_iommu_is_paging_enabled() argument
393 for (i = 0; i < iommu->num_mmu; i++) in rk_iommu_is_paging_enabled()
394 enable &= !!(rk_iommu_read(iommu->bases[i], RK_MMU_STATUS) & in rk_iommu_is_paging_enabled()
400 static bool rk_iommu_is_reset_done(struct rk_iommu *iommu) in rk_iommu_is_reset_done() argument
405 for (i = 0; i < iommu->num_mmu; i++) in rk_iommu_is_reset_done()
406 done &= rk_iommu_read(iommu->bases[i], RK_MMU_DTE_ADDR) == 0; in rk_iommu_is_reset_done()
411 static int rk_iommu_enable_stall(struct rk_iommu *iommu) in rk_iommu_enable_stall() argument
416 if (rk_iommu_is_stall_active(iommu)) in rk_iommu_enable_stall()
420 if (!rk_iommu_is_paging_enabled(iommu)) in rk_iommu_enable_stall()
423 rk_iommu_command(iommu, RK_MMU_CMD_ENABLE_STALL); in rk_iommu_enable_stall()
425 ret = readx_poll_timeout(rk_iommu_is_stall_active, iommu, val, in rk_iommu_enable_stall()
429 for (i = 0; i < iommu->num_mmu; i++) in rk_iommu_enable_stall()
430 dev_err(iommu->dev, "Enable stall request timed out, status: %#08x\n", in rk_iommu_enable_stall()
431 rk_iommu_read(iommu->bases[i], RK_MMU_STATUS)); in rk_iommu_enable_stall()
436 static int rk_iommu_disable_stall(struct rk_iommu *iommu) in rk_iommu_disable_stall() argument
441 if (!rk_iommu_is_stall_active(iommu)) in rk_iommu_disable_stall()
444 rk_iommu_command(iommu, RK_MMU_CMD_DISABLE_STALL); in rk_iommu_disable_stall()
446 ret = readx_poll_timeout(rk_iommu_is_stall_active, iommu, val, in rk_iommu_disable_stall()
450 for (i = 0; i < iommu->num_mmu; i++) in rk_iommu_disable_stall()
451 dev_err(iommu->dev, "Disable stall request timed out, status: %#08x\n", in rk_iommu_disable_stall()
452 rk_iommu_read(iommu->bases[i], RK_MMU_STATUS)); in rk_iommu_disable_stall()
457 static int rk_iommu_enable_paging(struct rk_iommu *iommu) in rk_iommu_enable_paging() argument
462 if (rk_iommu_is_paging_enabled(iommu)) in rk_iommu_enable_paging()
465 rk_iommu_command(iommu, RK_MMU_CMD_ENABLE_PAGING); in rk_iommu_enable_paging()
467 ret = readx_poll_timeout(rk_iommu_is_paging_enabled, iommu, val, in rk_iommu_enable_paging()
471 for (i = 0; i < iommu->num_mmu; i++) in rk_iommu_enable_paging()
472 dev_err(iommu->dev, "Enable paging request timed out, status: %#08x\n", in rk_iommu_enable_paging()
473 rk_iommu_read(iommu->bases[i], RK_MMU_STATUS)); in rk_iommu_enable_paging()
478 static int rk_iommu_disable_paging(struct rk_iommu *iommu) in rk_iommu_disable_paging() argument
483 if (!rk_iommu_is_paging_enabled(iommu)) in rk_iommu_disable_paging()
486 rk_iommu_command(iommu, RK_MMU_CMD_DISABLE_PAGING); in rk_iommu_disable_paging()
488 ret = readx_poll_timeout(rk_iommu_is_paging_enabled, iommu, val, in rk_iommu_disable_paging()
492 for (i = 0; i < iommu->num_mmu; i++) in rk_iommu_disable_paging()
493 dev_err(iommu->dev, "Disable paging request timed out, status: %#08x\n", in rk_iommu_disable_paging()
494 rk_iommu_read(iommu->bases[i], RK_MMU_STATUS)); in rk_iommu_disable_paging()
499 static int rk_iommu_force_reset(struct rk_iommu *iommu) in rk_iommu_force_reset() argument
505 if (iommu->reset_disabled) in rk_iommu_force_reset()
512 for (i = 0; i < iommu->num_mmu; i++) { in rk_iommu_force_reset()
514 rk_iommu_write(iommu->bases[i], RK_MMU_DTE_ADDR, dte_addr); in rk_iommu_force_reset()
516 if (dte_addr != rk_iommu_read(iommu->bases[i], RK_MMU_DTE_ADDR)) { in rk_iommu_force_reset()
517 dev_err(iommu->dev, "Error during raw reset. MMU_DTE_ADDR is not functioning\n"); in rk_iommu_force_reset()
522 rk_iommu_command(iommu, RK_MMU_CMD_FORCE_RESET); in rk_iommu_force_reset()
524 ret = readx_poll_timeout(rk_iommu_is_reset_done, iommu, val, in rk_iommu_force_reset()
528 dev_err(iommu->dev, "FORCE_RESET command timed out\n"); in rk_iommu_force_reset()
562 static void log_iova(struct rk_iommu *iommu, int index, dma_addr_t iova) in log_iova() argument
564 void __iomem *base = iommu->bases[index]; in log_iova()
601 dev_err(iommu->dev, "iova = %pad: dte_index: %#03x pte_index: %#03x page_offset: %#03x\n", in log_iova()
603 …dev_err(iommu->dev, "mmu_dte_addr: %pa dte@%pa: %#08x valid: %u pte@%pa: %#08x valid: %u page@%pa … in log_iova()
611 struct rk_iommu *iommu = dev_id; in rk_iommu_irq() local
618 err = pm_runtime_get_if_in_use(iommu->dev); in rk_iommu_irq()
622 if (WARN_ON(clk_bulk_enable(iommu->num_clocks, iommu->clocks))) in rk_iommu_irq()
625 for (i = 0; i < iommu->num_mmu; i++) { in rk_iommu_irq()
626 int_status = rk_iommu_read(iommu->bases[i], RK_MMU_INT_STATUS); in rk_iommu_irq()
631 iova = rk_iommu_read(iommu->bases[i], RK_MMU_PAGE_FAULT_ADDR); in rk_iommu_irq()
636 status = rk_iommu_read(iommu->bases[i], RK_MMU_STATUS); in rk_iommu_irq()
640 dev_err(iommu->dev, "Page fault at %pad of type %s\n", in rk_iommu_irq()
644 log_iova(iommu, i, iova); in rk_iommu_irq()
651 if (iommu->domain) in rk_iommu_irq()
652 report_iommu_fault(iommu->domain, iommu->dev, iova, in rk_iommu_irq()
655 dev_err(iommu->dev, "Page fault while iommu not attached to domain?\n"); in rk_iommu_irq()
657 rk_iommu_base_command(iommu->bases[i], RK_MMU_CMD_ZAP_CACHE); in rk_iommu_irq()
658 rk_iommu_base_command(iommu->bases[i], RK_MMU_CMD_PAGE_FAULT_DONE); in rk_iommu_irq()
662 dev_err(iommu->dev, "BUS_ERROR occurred at %pad\n", &iova); in rk_iommu_irq()
665 dev_err(iommu->dev, "unexpected int_status: %#08x\n", in rk_iommu_irq()
668 rk_iommu_write(iommu->bases[i], RK_MMU_INT_CLEAR, int_status); in rk_iommu_irq()
671 clk_bulk_disable(iommu->num_clocks, iommu->clocks); in rk_iommu_irq()
674 pm_runtime_put(iommu->dev); in rk_iommu_irq()
715 struct rk_iommu *iommu; in rk_iommu_zap_iova() local
718 iommu = list_entry(pos, struct rk_iommu, node); in rk_iommu_zap_iova()
721 ret = pm_runtime_get_if_in_use(iommu->dev); in rk_iommu_zap_iova()
725 WARN_ON(clk_bulk_enable(iommu->num_clocks, in rk_iommu_zap_iova()
726 iommu->clocks)); in rk_iommu_zap_iova()
727 rk_iommu_zap_lines(iommu, iova, size); in rk_iommu_zap_iova()
728 clk_bulk_disable(iommu->num_clocks, iommu->clocks); in rk_iommu_zap_iova()
729 pm_runtime_put(iommu->dev); in rk_iommu_zap_iova()
930 return data ? data->iommu : NULL; in rk_iommu_from_dev()
933 /* Must be called with iommu powered on and attached */
934 static void rk_iommu_disable(struct rk_iommu *iommu) in rk_iommu_disable() argument
939 WARN_ON(clk_bulk_enable(iommu->num_clocks, iommu->clocks)); in rk_iommu_disable()
940 rk_iommu_enable_stall(iommu); in rk_iommu_disable()
941 rk_iommu_disable_paging(iommu); in rk_iommu_disable()
942 for (i = 0; i < iommu->num_mmu; i++) { in rk_iommu_disable()
943 rk_iommu_write(iommu->bases[i], RK_MMU_INT_MASK, 0); in rk_iommu_disable()
944 rk_iommu_write(iommu->bases[i], RK_MMU_DTE_ADDR, 0); in rk_iommu_disable()
946 rk_iommu_disable_stall(iommu); in rk_iommu_disable()
947 clk_bulk_disable(iommu->num_clocks, iommu->clocks); in rk_iommu_disable()
950 /* Must be called with iommu powered on and attached */
951 static int rk_iommu_enable(struct rk_iommu *iommu) in rk_iommu_enable() argument
953 struct iommu_domain *domain = iommu->domain; in rk_iommu_enable()
957 ret = clk_bulk_enable(iommu->num_clocks, iommu->clocks); in rk_iommu_enable()
961 ret = rk_iommu_enable_stall(iommu); in rk_iommu_enable()
965 ret = rk_iommu_force_reset(iommu); in rk_iommu_enable()
969 for (i = 0; i < iommu->num_mmu; i++) { in rk_iommu_enable()
970 rk_iommu_write(iommu->bases[i], RK_MMU_DTE_ADDR, in rk_iommu_enable()
972 rk_iommu_base_command(iommu->bases[i], RK_MMU_CMD_ZAP_CACHE); in rk_iommu_enable()
973 rk_iommu_write(iommu->bases[i], RK_MMU_INT_MASK, RK_MMU_IRQ_MASK); in rk_iommu_enable()
976 ret = rk_iommu_enable_paging(iommu); in rk_iommu_enable()
979 rk_iommu_disable_stall(iommu); in rk_iommu_enable()
981 clk_bulk_disable(iommu->num_clocks, iommu->clocks); in rk_iommu_enable()
988 struct rk_iommu *iommu; in rk_iommu_detach_device() local
994 iommu = rk_iommu_from_dev(dev); in rk_iommu_detach_device()
995 if (!iommu) in rk_iommu_detach_device()
998 dev_dbg(dev, "Detaching from iommu domain\n"); in rk_iommu_detach_device()
1000 /* iommu already detached */ in rk_iommu_detach_device()
1001 if (iommu->domain != domain) in rk_iommu_detach_device()
1004 iommu->domain = NULL; in rk_iommu_detach_device()
1007 list_del_init(&iommu->node); in rk_iommu_detach_device()
1010 ret = pm_runtime_get_if_in_use(iommu->dev); in rk_iommu_detach_device()
1013 rk_iommu_disable(iommu); in rk_iommu_detach_device()
1014 pm_runtime_put(iommu->dev); in rk_iommu_detach_device()
1021 struct rk_iommu *iommu; in rk_iommu_attach_device() local
1028 * Such a device does not belong to an iommu group. in rk_iommu_attach_device()
1030 iommu = rk_iommu_from_dev(dev); in rk_iommu_attach_device()
1031 if (!iommu) in rk_iommu_attach_device()
1034 dev_dbg(dev, "Attaching to iommu domain\n"); in rk_iommu_attach_device()
1036 /* iommu already attached */ in rk_iommu_attach_device()
1037 if (iommu->domain == domain) in rk_iommu_attach_device()
1040 if (iommu->domain) in rk_iommu_attach_device()
1041 rk_iommu_detach_device(iommu->domain, dev); in rk_iommu_attach_device()
1043 iommu->domain = domain; in rk_iommu_attach_device()
1046 list_add_tail(&iommu->node, &rk_domain->iommus); in rk_iommu_attach_device()
1049 ret = pm_runtime_get_if_in_use(iommu->dev); in rk_iommu_attach_device()
1053 ret = rk_iommu_enable(iommu); in rk_iommu_attach_device()
1055 rk_iommu_detach_device(iommu->domain, dev); in rk_iommu_attach_device()
1057 pm_runtime_put(iommu->dev); in rk_iommu_attach_device()
1138 struct rk_iommu *iommu; in rk_iommu_probe_device() local
1144 iommu = rk_iommu_from_dev(dev); in rk_iommu_probe_device()
1146 data->link = device_link_add(dev, iommu->dev, in rk_iommu_probe_device()
1149 return &iommu->iommu; in rk_iommu_probe_device()
1161 struct rk_iommu *iommu; in rk_iommu_device_group() local
1163 iommu = rk_iommu_from_dev(dev); in rk_iommu_device_group()
1165 return iommu_group_ref_get(iommu->group); in rk_iommu_device_group()
1180 data->iommu = platform_get_drvdata(iommu_dev); in rk_iommu_of_xlate()
1208 struct rk_iommu *iommu; in rk_iommu_probe() local
1214 iommu = devm_kzalloc(dev, sizeof(*iommu), GFP_KERNEL); in rk_iommu_probe()
1215 if (!iommu) in rk_iommu_probe()
1218 platform_set_drvdata(pdev, iommu); in rk_iommu_probe()
1219 iommu->dev = dev; in rk_iommu_probe()
1220 iommu->num_mmu = 0; in rk_iommu_probe()
1233 iommu->bases = devm_kcalloc(dev, num_res, sizeof(*iommu->bases), in rk_iommu_probe()
1235 if (!iommu->bases) in rk_iommu_probe()
1242 iommu->bases[i] = devm_ioremap_resource(&pdev->dev, res); in rk_iommu_probe()
1243 if (IS_ERR(iommu->bases[i])) in rk_iommu_probe()
1245 iommu->num_mmu++; in rk_iommu_probe()
1247 if (iommu->num_mmu == 0) in rk_iommu_probe()
1248 return PTR_ERR(iommu->bases[0]); in rk_iommu_probe()
1250 iommu->num_irq = platform_irq_count(pdev); in rk_iommu_probe()
1251 if (iommu->num_irq < 0) in rk_iommu_probe()
1252 return iommu->num_irq; in rk_iommu_probe()
1254 iommu->reset_disabled = device_property_read_bool(dev, in rk_iommu_probe()
1257 iommu->num_clocks = ARRAY_SIZE(rk_iommu_clocks); in rk_iommu_probe()
1258 iommu->clocks = devm_kcalloc(iommu->dev, iommu->num_clocks, in rk_iommu_probe()
1259 sizeof(*iommu->clocks), GFP_KERNEL); in rk_iommu_probe()
1260 if (!iommu->clocks) in rk_iommu_probe()
1263 for (i = 0; i < iommu->num_clocks; ++i) in rk_iommu_probe()
1264 iommu->clocks[i].id = rk_iommu_clocks[i]; in rk_iommu_probe()
1267 * iommu clocks should be present for all new devices and devicetrees in rk_iommu_probe()
1271 err = devm_clk_bulk_get(iommu->dev, iommu->num_clocks, iommu->clocks); in rk_iommu_probe()
1273 iommu->num_clocks = 0; in rk_iommu_probe()
1277 err = clk_bulk_prepare(iommu->num_clocks, iommu->clocks); in rk_iommu_probe()
1281 iommu->group = iommu_group_alloc(); in rk_iommu_probe()
1282 if (IS_ERR(iommu->group)) { in rk_iommu_probe()
1283 err = PTR_ERR(iommu->group); in rk_iommu_probe()
1287 err = iommu_device_sysfs_add(&iommu->iommu, dev, NULL, dev_name(dev)); in rk_iommu_probe()
1291 err = iommu_device_register(&iommu->iommu, &rk_iommu_ops, dev); in rk_iommu_probe()
1296 * Use the first registered IOMMU device for domain to use with DMA in rk_iommu_probe()
1298 * IOMMU device.. in rk_iommu_probe()
1305 for (i = 0; i < iommu->num_irq; i++) { in rk_iommu_probe()
1311 err = devm_request_irq(iommu->dev, irq, rk_iommu_irq, in rk_iommu_probe()
1312 IRQF_SHARED, dev_name(dev), iommu); in rk_iommu_probe()
1323 iommu_device_sysfs_remove(&iommu->iommu); in rk_iommu_probe()
1325 iommu_group_put(iommu->group); in rk_iommu_probe()
1327 clk_bulk_unprepare(iommu->num_clocks, iommu->clocks); in rk_iommu_probe()
1333 struct rk_iommu *iommu = platform_get_drvdata(pdev); in rk_iommu_shutdown() local
1336 for (i = 0; i < iommu->num_irq; i++) { in rk_iommu_shutdown()
1339 devm_free_irq(iommu->dev, irq, iommu); in rk_iommu_shutdown()
1347 struct rk_iommu *iommu = dev_get_drvdata(dev); in rk_iommu_suspend() local
1349 if (!iommu->domain) in rk_iommu_suspend()
1352 rk_iommu_disable(iommu); in rk_iommu_suspend()
1358 struct rk_iommu *iommu = dev_get_drvdata(dev); in rk_iommu_resume() local
1360 if (!iommu->domain) in rk_iommu_resume()
1363 return rk_iommu_enable(iommu); in rk_iommu_resume()
1391 { .compatible = "rockchip,iommu",
1394 { .compatible = "rockchip,rk3568-iommu",