2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License version 2 as
4 * published by the Free Software Foundation.
7 #ifdef CONFIG_ROCKCHIP_IOMMU_DEBUG
12 #include <linux/interrupt.h>
13 #include <linux/slab.h>
14 #include <linux/clk.h>
15 #include <linux/err.h>
17 #include <linux/errno.h>
18 #include <linux/memblock.h>
19 #include <linux/export.h>
20 #include <linux/module.h>
22 #include <asm/cacheflush.h>
23 #include <asm/pgtable.h>
25 #include <linux/rockchip-iovmm.h>
26 #include <linux/rockchip/grf.h>
27 #include <linux/rockchip/cpu.h>
28 #include <linux/rockchip/iomap.h>
29 #include <linux/device.h>
30 #include "rockchip-iommu.h"
32 /* We does not consider super section mapping (16MB) */
33 #define SPAGE_ORDER 12
34 #define SPAGE_SIZE (1 << SPAGE_ORDER)
35 #define SPAGE_MASK (~(SPAGE_SIZE - 1))
37 static void __iomem *rk312x_vop_mmu_base;
39 enum iommu_entry_flags {
40 IOMMU_FLAGS_PRESENT = 0x01,
41 IOMMU_FLAGS_READ_PERMISSION = 0x02,
42 IOMMU_FLAGS_WRITE_PERMISSION = 0x04,
43 IOMMU_FLAGS_OVERRIDE_CACHE = 0x8,
44 IOMMU_FLAGS_WRITE_CACHEABLE = 0x10,
45 IOMMU_FLAGS_WRITE_ALLOCATE = 0x20,
46 IOMMU_FLAGS_WRITE_BUFFERABLE = 0x40,
47 IOMMU_FLAGS_READ_CACHEABLE = 0x80,
48 IOMMU_FLAGS_READ_ALLOCATE = 0x100,
49 IOMMU_FLAGS_MASK = 0x1FF,
52 #define rockchip_lv1ent_fault(sent) ((*(sent) & IOMMU_FLAGS_PRESENT) == 0)
53 #define rockchip_lv1ent_page(sent) ((*(sent) & IOMMU_FLAGS_PRESENT) == 1)
54 #define rockchip_lv2ent_fault(pent) ((*(pent) & IOMMU_FLAGS_PRESENT) == 0)
55 #define rockchip_spage_phys(pent) (*(pent) & SPAGE_MASK)
56 #define rockchip_spage_offs(iova) ((iova) & 0x0FFF)
58 #define rockchip_lv1ent_offset(iova) (((iova)>>22) & 0x03FF)
59 #define rockchip_lv2ent_offset(iova) (((iova)>>12) & 0x03FF)
61 #define NUM_LV1ENTRIES 1024
62 #define NUM_LV2ENTRIES 1024
64 #define LV2TABLE_SIZE (NUM_LV2ENTRIES * sizeof(long))
66 #define rockchip_lv2table_base(sent) (*(sent) & 0xFFFFFFFE)
68 #define rockchip_mk_lv1ent_page(pa) ((pa) | IOMMU_FLAGS_PRESENT)
69 /*write and read permission for level2 page default*/
70 #define rockchip_mk_lv2ent_spage(pa) ((pa) | IOMMU_FLAGS_PRESENT | \
71 IOMMU_FLAGS_READ_PERMISSION | \
72 IOMMU_FLAGS_WRITE_PERMISSION)
74 #define IOMMU_REG_POLL_COUNT_FAST 1000
77 * MMU register numbers
78 * Used in the register read/write routines.
79 * See the hardware documentation for more information about each register
82 /**< Current Page Directory Pointer */
83 IOMMU_REGISTER_DTE_ADDR = 0x0000,
84 /**< Status of the MMU */
85 IOMMU_REGISTER_STATUS = 0x0004,
86 /**< Command register, used to control the MMU */
87 IOMMU_REGISTER_COMMAND = 0x0008,
88 /**< Logical address of the last page fault */
89 IOMMU_REGISTER_PAGE_FAULT_ADDR = 0x000C,
90 /**< Used to invalidate the mapping of a single page from the MMU */
91 IOMMU_REGISTER_ZAP_ONE_LINE = 0x010,
92 /**< Raw interrupt status, all interrupts visible */
93 IOMMU_REGISTER_INT_RAWSTAT = 0x0014,
94 /**< Indicate to the MMU that the interrupt has been received */
95 IOMMU_REGISTER_INT_CLEAR = 0x0018,
96 /**< Enable/disable types of interrupts */
97 IOMMU_REGISTER_INT_MASK = 0x001C,
98 /**< Interrupt status based on the mask */
99 IOMMU_REGISTER_INT_STATUS = 0x0020,
100 IOMMU_REGISTER_AUTO_GATING = 0x0024
104 /**< Enable paging (memory translation) */
105 IOMMU_COMMAND_ENABLE_PAGING = 0x00,
106 /**< Disable paging (memory translation) */
107 IOMMU_COMMAND_DISABLE_PAGING = 0x01,
108 /**< Enable stall on page fault */
109 IOMMU_COMMAND_ENABLE_STALL = 0x02,
110 /**< Disable stall on page fault */
111 IOMMU_COMMAND_DISABLE_STALL = 0x03,
112 /**< Zap the entire page table cache */
113 IOMMU_COMMAND_ZAP_CACHE = 0x04,
114 /**< Page fault processed */
115 IOMMU_COMMAND_PAGE_FAULT_DONE = 0x05,
116 /**< Reset the MMU back to power-on settings */
117 IOMMU_COMMAND_HARD_RESET = 0x06
121 * MMU interrupt register bits
122 * Each cause of the interrupt is reported
123 * through the (raw) interrupt status registers.
124 * Multiple interrupts can be pending, so multiple bits
125 * can be set at once.
127 enum iommu_interrupt {
128 IOMMU_INTERRUPT_PAGE_FAULT = 0x01, /**< A page fault occured */
129 IOMMU_INTERRUPT_READ_BUS_ERROR = 0x02 /**< A bus read error occured */
132 enum iommu_status_bits {
133 IOMMU_STATUS_BIT_PAGING_ENABLED = 1 << 0,
134 IOMMU_STATUS_BIT_PAGE_FAULT_ACTIVE = 1 << 1,
135 IOMMU_STATUS_BIT_STALL_ACTIVE = 1 << 2,
136 IOMMU_STATUS_BIT_IDLE = 1 << 3,
137 IOMMU_STATUS_BIT_REPLAY_BUFFER_EMPTY = 1 << 4,
138 IOMMU_STATUS_BIT_PAGE_FAULT_IS_WRITE = 1 << 5,
139 IOMMU_STATUS_BIT_STALL_NOT_ACTIVE = 1 << 31,
143 * Size of an MMU page in bytes
145 #define IOMMU_PAGE_SIZE 0x1000
148 * Size of the address space referenced by a page table page
150 #define IOMMU_VIRTUAL_PAGE_SIZE 0x400000 /* 4 MiB */
153 * Page directory index from address
154 * Calculates the page directory index from the given address
156 #define IOMMU_PDE_ENTRY(address) (((address)>>22) & 0x03FF)
159 * Page table index from address
160 * Calculates the page table index from the given address
162 #define IOMMU_PTE_ENTRY(address) (((address)>>12) & 0x03FF)
165 * Extract the memory address from an PDE/PTE entry
167 #define IOMMU_ENTRY_ADDRESS(value) ((value) & 0xFFFFFC00)
169 #define INVALID_PAGE ((u32)(~0))
171 static struct kmem_cache *lv2table_kmem_cache;
173 static unsigned long *rockchip_section_entry(unsigned long *pgtable, unsigned long iova)
175 return pgtable + rockchip_lv1ent_offset(iova);
178 static unsigned long *rockchip_page_entry(unsigned long *sent, unsigned long iova)
180 return (unsigned long *)__va(rockchip_lv2table_base(sent)) +
181 rockchip_lv2ent_offset(iova);
184 struct rk_iommu_domain {
185 struct list_head clients; /* list of iommu_drvdata.node */
186 unsigned long *pgtable; /* lv1 page table, 4KB */
187 short *lv2entcnt; /* free lv2 entry counter for each section */
188 spinlock_t lock; /* lock for this structure */
189 spinlock_t pgtablelock; /* lock for modifying page table @ pgtable */
192 static bool rockchip_set_iommu_active(struct iommu_drvdata *data)
194 /* return true if the IOMMU was not active previously
195 and it needs to be initialized */
196 return ++data->activations == 1;
199 static bool rockchip_set_iommu_inactive(struct iommu_drvdata *data)
201 /* return true if the IOMMU is needed to be disabled */
202 BUG_ON(data->activations < 1);
203 return --data->activations == 0;
206 static bool rockchip_is_iommu_active(struct iommu_drvdata *data)
208 return data->activations > 0;
211 static void rockchip_iommu_disable_stall(void __iomem *base)
216 if (base != rk312x_vop_mmu_base) {
217 mmu_status = __raw_readl(base + IOMMU_REGISTER_STATUS);
219 goto skip_vop_mmu_disable;
222 if (0 == (mmu_status & IOMMU_STATUS_BIT_PAGING_ENABLED)) {
226 if (mmu_status & IOMMU_STATUS_BIT_PAGE_FAULT_ACTIVE) {
227 pr_info("Aborting MMU disable stall request since it is in pagefault state.\n");
231 if (!(mmu_status & IOMMU_STATUS_BIT_STALL_ACTIVE)) {
235 __raw_writel(IOMMU_COMMAND_DISABLE_STALL, base + IOMMU_REGISTER_COMMAND);
237 skip_vop_mmu_disable:
239 for (i = 0; i < IOMMU_REG_POLL_COUNT_FAST; ++i) {
242 if (base != rk312x_vop_mmu_base) {
243 status = __raw_readl(base + IOMMU_REGISTER_STATUS);
251 if (0 == (status & IOMMU_STATUS_BIT_STALL_ACTIVE))
254 if (status & IOMMU_STATUS_BIT_PAGE_FAULT_ACTIVE)
257 if (0 == (mmu_status & IOMMU_STATUS_BIT_PAGING_ENABLED))
261 if (IOMMU_REG_POLL_COUNT_FAST == i) {
262 pr_info("Disable stall request failed, MMU status is 0x%08X\n",
263 __raw_readl(base + IOMMU_REGISTER_STATUS));
267 static bool rockchip_iommu_enable_stall(void __iomem *base)
273 if (base != rk312x_vop_mmu_base) {
274 mmu_status = __raw_readl(base + IOMMU_REGISTER_STATUS);
276 goto skip_vop_mmu_enable;
279 if (0 == (mmu_status & IOMMU_STATUS_BIT_PAGING_ENABLED)) {
283 if (mmu_status & IOMMU_STATUS_BIT_STALL_ACTIVE){
284 pr_info("MMU stall already enabled\n");
288 if (mmu_status & IOMMU_STATUS_BIT_PAGE_FAULT_ACTIVE) {
289 pr_info("Aborting MMU stall request since it is in pagefault state. mmu status is 0x%08x\n",
294 __raw_writel(IOMMU_COMMAND_ENABLE_STALL, base + IOMMU_REGISTER_COMMAND);
298 for (i = 0; i < IOMMU_REG_POLL_COUNT_FAST; ++i) {
299 if (base != rk312x_vop_mmu_base) {
300 mmu_status = __raw_readl(base + IOMMU_REGISTER_STATUS);
308 if (mmu_status & IOMMU_STATUS_BIT_PAGE_FAULT_ACTIVE)
311 if ((mmu_status & IOMMU_STATUS_BIT_STALL_ACTIVE) &&
312 (0 == (mmu_status & IOMMU_STATUS_BIT_STALL_NOT_ACTIVE)))
315 if (0 == (mmu_status & (IOMMU_STATUS_BIT_PAGING_ENABLED)))
319 if (IOMMU_REG_POLL_COUNT_FAST == i) {
320 pr_info("Enable stall request failed, MMU status is 0x%08X\n",
321 __raw_readl(base + IOMMU_REGISTER_STATUS));
325 if (mmu_status & IOMMU_STATUS_BIT_PAGE_FAULT_ACTIVE) {
326 pr_info("Aborting MMU stall request since it has a pagefault.\n");
333 static bool rockchip_iommu_enable_paging(void __iomem *base)
337 __raw_writel(IOMMU_COMMAND_ENABLE_PAGING,
338 base + IOMMU_REGISTER_COMMAND);
340 for (i = 0; i < IOMMU_REG_POLL_COUNT_FAST; ++i) {
341 if (base != rk312x_vop_mmu_base) {
342 if (__raw_readl(base + IOMMU_REGISTER_STATUS) &
343 IOMMU_STATUS_BIT_PAGING_ENABLED)
353 if (IOMMU_REG_POLL_COUNT_FAST == i) {
354 pr_info("Enable paging request failed, MMU status is 0x%08X\n",
355 __raw_readl(base + IOMMU_REGISTER_STATUS));
362 static bool rockchip_iommu_disable_paging(void __iomem *base)
366 __raw_writel(IOMMU_COMMAND_DISABLE_PAGING,
367 base + IOMMU_REGISTER_COMMAND);
369 for (i = 0; i < IOMMU_REG_POLL_COUNT_FAST; ++i) {
370 if (base != rk312x_vop_mmu_base) {
371 if (!(__raw_readl(base + IOMMU_REGISTER_STATUS) &
372 IOMMU_STATUS_BIT_PAGING_ENABLED))
382 if (IOMMU_REG_POLL_COUNT_FAST == i) {
383 pr_info("Disable paging request failed, MMU status is 0x%08X\n",
384 __raw_readl(base + IOMMU_REGISTER_STATUS));
391 static void rockchip_iommu_page_fault_done(void __iomem *base, const char *dbgname)
393 pr_info("MMU: %s: Leaving page fault mode\n",
395 __raw_writel(IOMMU_COMMAND_PAGE_FAULT_DONE,
396 base + IOMMU_REGISTER_COMMAND);
399 static int rockchip_iommu_zap_tlb_without_stall (void __iomem *base)
401 __raw_writel(IOMMU_COMMAND_ZAP_CACHE, base + IOMMU_REGISTER_COMMAND);
406 static int rockchip_iommu_zap_tlb(void __iomem *base)
408 if (!rockchip_iommu_enable_stall(base)) {
409 pr_err("%s failed\n", __func__);
413 __raw_writel(IOMMU_COMMAND_ZAP_CACHE, base + IOMMU_REGISTER_COMMAND);
415 rockchip_iommu_disable_stall(base);
420 static inline bool rockchip_iommu_raw_reset(void __iomem *base)
424 unsigned int grf_value;
426 __raw_writel(0xCAFEBABE, base + IOMMU_REGISTER_DTE_ADDR);
428 if (base != rk312x_vop_mmu_base) {
429 ret = __raw_readl(base + IOMMU_REGISTER_DTE_ADDR);
430 if (!(0xCAFEB000 == ret)) {
431 grf_value = readl_relaxed(RK_GRF_VIRT + RK3036_GRF_SOC_CON1);
432 pr_info("error when %s. grf = 0x%08x\n", __func__, grf_value);
436 __raw_writel(IOMMU_COMMAND_HARD_RESET,
437 base + IOMMU_REGISTER_COMMAND);
439 for (i = 0; i < IOMMU_REG_POLL_COUNT_FAST; ++i) {
440 if (base != rk312x_vop_mmu_base) {
441 if (__raw_readl(base + IOMMU_REGISTER_DTE_ADDR) == 0)
451 if (IOMMU_REG_POLL_COUNT_FAST == i) {
452 pr_info("%s,Reset request failed, MMU status is 0x%08X\n",
453 __func__, __raw_readl(base + IOMMU_REGISTER_DTE_ADDR));
459 static void rockchip_iommu_set_ptbase(void __iomem *base, unsigned long pgd)
461 __raw_writel(pgd, base + IOMMU_REGISTER_DTE_ADDR);
464 static bool rockchip_iommu_reset(void __iomem *base, const char *dbgname)
468 ret = rockchip_iommu_raw_reset(base);
470 pr_info("(%s), %s failed\n", dbgname, __func__);
474 if (base != rk312x_vop_mmu_base)
475 __raw_writel(IOMMU_INTERRUPT_PAGE_FAULT |
476 IOMMU_INTERRUPT_READ_BUS_ERROR,
477 base + IOMMU_REGISTER_INT_MASK);
479 __raw_writel(0x00, base + IOMMU_REGISTER_INT_MASK);
484 static inline void rockchip_pgtable_flush(void *vastart, void *vaend)
487 dmac_flush_range(vastart, vaend);
488 outer_flush_range(virt_to_phys(vastart), virt_to_phys(vaend));
489 #elif defined(CONFIG_ARM64)
490 __dma_flush_range(vastart, vaend);
494 static void dump_pagetbl(dma_addr_t fault_address, u32 addr_dte)
496 u32 dte_index, pte_index, page_offset;
498 phys_addr_t mmu_dte_addr_phys, dte_addr_phys;
501 phys_addr_t pte_addr_phys = 0;
502 u32 *pte_addr = NULL;
504 phys_addr_t page_addr_phys = 0;
507 dte_index = rockchip_lv1ent_offset(fault_address);
508 pte_index = rockchip_lv2ent_offset(fault_address);
509 page_offset = (u32)(fault_address & 0x00000fff);
511 mmu_dte_addr = addr_dte;
512 mmu_dte_addr_phys = (phys_addr_t)mmu_dte_addr;
514 dte_addr_phys = mmu_dte_addr_phys + (4 * dte_index);
515 dte_addr = phys_to_virt(dte_addr_phys);
518 if (!(IOMMU_FLAGS_PRESENT & dte))
521 pte_addr_phys = ((phys_addr_t)dte & 0xfffff000) + (pte_index * 4);
522 pte_addr = phys_to_virt(pte_addr_phys);
525 if (!(IOMMU_FLAGS_PRESENT & pte))
528 page_addr_phys = ((phys_addr_t)pte & 0xfffff000) + page_offset;
529 page_flags = pte & 0x000001fe;
532 pr_err("iova = %pad: dte_index: 0x%03x pte_index: 0x%03x page_offset: 0x%03x\n",
533 &fault_address, dte_index, pte_index, page_offset);
534 pr_err("mmu_dte_addr: %pa dte@%pa: %#08x valid: %u pte@%pa: %#08x valid: %u page@%pa flags: %#03x\n",
535 &mmu_dte_addr_phys, &dte_addr_phys, dte,
536 (dte & IOMMU_FLAGS_PRESENT), &pte_addr_phys, pte,
537 (pte & IOMMU_FLAGS_PRESENT), &page_addr_phys, page_flags);
540 static irqreturn_t rockchip_iommu_irq(int irq, void *dev_id)
542 /* SYSMMU is in blocked when interrupt occurred. */
543 struct iommu_drvdata *data = dev_id;
546 dma_addr_t fault_address;
552 spin_lock_irqsave(&data->data_lock, flags);
554 if (!rockchip_is_iommu_active(data)) {
555 spin_unlock_irqrestore(&data->data_lock, flags);
559 for (i = 0; i < data->num_res_mem; i++) {
560 status = __raw_readl(data->res_bases[i] +
561 IOMMU_REGISTER_INT_STATUS);
565 rawstat = __raw_readl(data->res_bases[i] +
566 IOMMU_REGISTER_INT_RAWSTAT);
568 reg_status = __raw_readl(data->res_bases[i] +
569 IOMMU_REGISTER_STATUS);
571 dev_info(data->iommu, "1.rawstat = 0x%08x,status = 0x%08x,reg_status = 0x%08x\n",
572 rawstat, status, reg_status);
574 if (rawstat & IOMMU_INTERRUPT_PAGE_FAULT) {
578 fault_address = __raw_readl(data->res_bases[i] +
579 IOMMU_REGISTER_PAGE_FAULT_ADDR);
581 dte = __raw_readl(data->res_bases[i] +
582 IOMMU_REGISTER_DTE_ADDR);
584 flags = (status & 32) ? 1 : 0;
586 dev_err(data->iommu, "Page fault detected at %pad from bus id %d of type %s on %s\n",
587 &fault_address, (status >> 6) & 0x1F,
588 (flags == 1) ? "write" : "read", data->dbgname);
590 dump_pagetbl(fault_address, dte);
593 report_iommu_fault(data->domain, data->iommu,
594 fault_address, flags);
596 rockchip_iommu_page_fault_done(data->res_bases[i],
600 if (rawstat & IOMMU_INTERRUPT_READ_BUS_ERROR) {
601 dev_err(data->iommu, "bus error occured at %pad\n",
605 if (rawstat & ~(IOMMU_INTERRUPT_READ_BUS_ERROR |
606 IOMMU_INTERRUPT_PAGE_FAULT)) {
607 dev_err(data->iommu, "unexpected int_status: %#08x\n\n",
611 __raw_writel(rawstat, data->res_bases[i] +
612 IOMMU_REGISTER_INT_CLEAR);
614 status = __raw_readl(data->res_bases[i] +
615 IOMMU_REGISTER_INT_STATUS);
617 rawstat = __raw_readl(data->res_bases[i] +
618 IOMMU_REGISTER_INT_RAWSTAT);
620 reg_status = __raw_readl(data->res_bases[i] +
621 IOMMU_REGISTER_STATUS);
623 dev_info(data->iommu, "2.rawstat = 0x%08x,status = 0x%08x,reg_status = 0x%08x\n",
624 rawstat, status, reg_status);
626 ret = rockchip_iommu_zap_tlb_without_stall(data->res_bases[i]);
628 dev_err(data->iommu, "(%s) %s failed\n", data->dbgname,
632 spin_unlock_irqrestore(&data->data_lock, flags);
636 static bool rockchip_iommu_disable(struct iommu_drvdata *data)
642 spin_lock_irqsave(&data->data_lock, flags);
644 if (!rockchip_set_iommu_inactive(data)) {
645 spin_unlock_irqrestore(&data->data_lock, flags);
646 dev_info(data->iommu,"(%s) %d times left to be disabled\n",
647 data->dbgname, data->activations);
651 for (i = 0; i < data->num_res_mem; i++) {
652 ret = rockchip_iommu_enable_stall(data->res_bases[i]);
654 dev_info(data->iommu, "(%s), %s failed\n",
655 data->dbgname, __func__);
656 spin_unlock_irqrestore(&data->data_lock, flags);
660 __raw_writel(0, data->res_bases[i] + IOMMU_REGISTER_INT_MASK);
662 ret = rockchip_iommu_disable_paging(data->res_bases[i]);
664 rockchip_iommu_disable_stall(data->res_bases[i]);
665 spin_unlock_irqrestore(&data->data_lock, flags);
666 dev_info(data->iommu, "%s error\n", __func__);
669 rockchip_iommu_disable_stall(data->res_bases[i]);
674 spin_unlock_irqrestore(&data->data_lock, flags);
676 dev_dbg(data->iommu,"(%s) Disabled\n", data->dbgname);
681 /* __rk_sysmmu_enable: Enables System MMU
683 * returns -error if an error occurred and System MMU is not enabled,
684 * 0 if the System MMU has been just enabled and 1 if System MMU was already
687 static int rockchip_iommu_enable(struct iommu_drvdata *data, unsigned long pgtable)
692 spin_lock_irqsave(&data->data_lock, flags);
694 if (!rockchip_set_iommu_active(data)) {
695 if (WARN_ON(pgtable != data->pgtable)) {
697 rockchip_set_iommu_inactive(data);
702 spin_unlock_irqrestore(&data->data_lock, flags);
703 dev_info(data->iommu, "(%s) Already enabled\n", data->dbgname);
708 for (i = 0; i < data->num_res_mem; i++) {
709 ret = rockchip_iommu_enable_stall(data->res_bases[i]);
711 dev_info(data->iommu, "(%s), %s failed\n",
712 data->dbgname, __func__);
713 spin_unlock_irqrestore(&data->data_lock, flags);
717 if (!strstr(data->dbgname, "isp")) {
718 if (!rockchip_iommu_reset(data->res_bases[i],
720 spin_unlock_irqrestore(&data->data_lock, flags);
725 rockchip_iommu_set_ptbase(data->res_bases[i], pgtable);
727 __raw_writel(IOMMU_COMMAND_ZAP_CACHE, data->res_bases[i] +
728 IOMMU_REGISTER_COMMAND);
730 if (strstr(data->dbgname, "isp")) {
731 __raw_writel(IOMMU_INTERRUPT_PAGE_FAULT |
732 IOMMU_INTERRUPT_READ_BUS_ERROR,
733 data->res_bases[i] + IOMMU_REGISTER_INT_MASK);
736 ret = rockchip_iommu_enable_paging(data->res_bases[i]);
738 spin_unlock_irqrestore(&data->data_lock, flags);
739 dev_info(data->iommu, "(%s), %s failed\n",
740 data->dbgname, __func__);
744 rockchip_iommu_disable_stall(data->res_bases[i]);
747 data->pgtable = pgtable;
749 dev_dbg(data->iommu,"(%s) Enabled\n", data->dbgname);
751 spin_unlock_irqrestore(&data->data_lock, flags);
756 int rockchip_iommu_tlb_invalidate(struct device *dev)
759 struct iommu_drvdata *data = dev_get_drvdata(dev->archdata.iommu);
761 spin_lock_irqsave(&data->data_lock, flags);
763 if (rockchip_is_iommu_active(data)) {
767 for (i = 0; i < data->num_res_mem; i++) {
768 ret = rockchip_iommu_zap_tlb(data->res_bases[i]);
770 dev_err(dev->archdata.iommu, "(%s) %s failed\n",
771 data->dbgname, __func__);
772 spin_unlock_irqrestore(&data->data_lock, flags);
778 dev_dbg(dev->archdata.iommu, "(%s) Disabled. Skipping invalidating TLB.\n",
782 spin_unlock_irqrestore(&data->data_lock, flags);
787 static phys_addr_t rockchip_iommu_iova_to_phys(struct iommu_domain *domain,
790 struct rk_iommu_domain *priv = domain->priv;
791 unsigned long *entry;
793 phys_addr_t phys = 0;
795 spin_lock_irqsave(&priv->pgtablelock, flags);
797 entry = rockchip_section_entry(priv->pgtable, iova);
798 entry = rockchip_page_entry(entry, iova);
799 phys = rockchip_spage_phys(entry) + rockchip_spage_offs(iova);
801 spin_unlock_irqrestore(&priv->pgtablelock, flags);
806 static int rockchip_lv2set_page(unsigned long *pent, phys_addr_t paddr,
807 size_t size, short *pgcnt)
809 if (!rockchip_lv2ent_fault(pent))
812 *pent = rockchip_mk_lv2ent_spage(paddr);
813 rockchip_pgtable_flush(pent, pent + 1);
818 static unsigned long *rockchip_alloc_lv2entry(unsigned long *sent,
819 unsigned long iova, short *pgcounter)
821 if (rockchip_lv1ent_fault(sent)) {
824 pent = kmem_cache_zalloc(lv2table_kmem_cache, GFP_ATOMIC);
825 BUG_ON((unsigned long)pent & (LV2TABLE_SIZE - 1));
829 *sent = rockchip_mk_lv1ent_page(__pa(pent));
830 kmemleak_ignore(pent);
831 *pgcounter = NUM_LV2ENTRIES;
832 rockchip_pgtable_flush(pent, pent + NUM_LV2ENTRIES);
833 rockchip_pgtable_flush(sent, sent + 1);
835 return rockchip_page_entry(sent, iova);
838 static size_t rockchip_iommu_unmap(struct iommu_domain *domain,
839 unsigned long iova, size_t size)
841 struct rk_iommu_domain *priv = domain->priv;
845 BUG_ON(priv->pgtable == NULL);
847 spin_lock_irqsave(&priv->pgtablelock, flags);
849 ent = rockchip_section_entry(priv->pgtable, iova);
851 if (unlikely(rockchip_lv1ent_fault(ent))) {
852 if (size > SPAGE_SIZE)
857 /* lv1ent_page(sent) == true here */
859 ent = rockchip_page_entry(ent, iova);
861 if (unlikely(rockchip_lv2ent_fault(ent))) {
868 priv->lv2entcnt[rockchip_lv1ent_offset(iova)] += 1;
873 pr_info("%s:unmap iova 0x%lx/0x%x bytes\n",
874 __func__, iova,size);
876 spin_unlock_irqrestore(&priv->pgtablelock, flags);
881 static int rockchip_iommu_map(struct iommu_domain *domain, unsigned long iova,
882 phys_addr_t paddr, size_t size, int prot)
884 struct rk_iommu_domain *priv = domain->priv;
885 unsigned long *entry;
890 BUG_ON(priv->pgtable == NULL);
892 spin_lock_irqsave(&priv->pgtablelock, flags);
894 entry = rockchip_section_entry(priv->pgtable, iova);
896 pent = rockchip_alloc_lv2entry(entry, iova,
897 &priv->lv2entcnt[rockchip_lv1ent_offset(iova)]);
901 ret = rockchip_lv2set_page(pent, paddr, size,
902 &priv->lv2entcnt[rockchip_lv1ent_offset(iova)]);
905 pr_info("%s: Failed to map iova 0x%lx/0x%x bytes\n", __func__,
908 spin_unlock_irqrestore(&priv->pgtablelock, flags);
913 static void rockchip_iommu_detach_device(struct iommu_domain *domain, struct device *dev)
915 struct iommu_drvdata *data = dev_get_drvdata(dev->archdata.iommu);
916 struct rk_iommu_domain *priv = domain->priv;
917 struct list_head *pos;
921 spin_lock_irqsave(&priv->lock, flags);
923 list_for_each(pos, &priv->clients) {
924 if (list_entry(pos, struct iommu_drvdata, node) == data) {
931 spin_unlock_irqrestore(&priv->lock, flags);
935 if (rockchip_iommu_disable(data)) {
936 dev_dbg(dev->archdata.iommu,"%s: Detached IOMMU with pgtable %#lx\n",
937 __func__, __pa(priv->pgtable));
939 list_del_init(&data->node);
942 dev_err(dev->archdata.iommu,"%s: Detaching IOMMU with pgtable %#lx delayed",
943 __func__, __pa(priv->pgtable));
945 spin_unlock_irqrestore(&priv->lock, flags);
948 static int rockchip_iommu_attach_device(struct iommu_domain *domain, struct device *dev)
950 struct iommu_drvdata *data = dev_get_drvdata(dev->archdata.iommu);
951 struct rk_iommu_domain *priv = domain->priv;
955 spin_lock_irqsave(&priv->lock, flags);
957 ret = rockchip_iommu_enable(data, __pa(priv->pgtable));
960 /* 'data->node' must not be appeared in priv->clients */
961 BUG_ON(!list_empty(&data->node));
962 list_add_tail(&data->node, &priv->clients);
963 data->domain = domain;
966 spin_unlock_irqrestore(&priv->lock, flags);
969 dev_err(dev->archdata.iommu,"%s: Failed to attach IOMMU with pgtable %#lx\n",
970 __func__, __pa(priv->pgtable));
971 } else if (ret > 0) {
972 dev_dbg(dev->archdata.iommu,"%s: IOMMU with pgtable 0x%lx already attached\n",
973 __func__, __pa(priv->pgtable));
975 dev_dbg(dev->archdata.iommu,"%s: Attached new IOMMU with pgtable 0x%lx\n",
976 __func__, __pa(priv->pgtable));
982 static void rockchip_iommu_domain_destroy(struct iommu_domain *domain)
984 struct rk_iommu_domain *priv = domain->priv;
987 WARN_ON(!list_empty(&priv->clients));
989 for (i = 0; i < NUM_LV1ENTRIES; i++)
990 if (rockchip_lv1ent_page(priv->pgtable + i))
991 kmem_cache_free(lv2table_kmem_cache,
992 __va(rockchip_lv2table_base(priv->pgtable + i)));
994 free_pages((unsigned long)priv->pgtable, 0);
995 free_pages((unsigned long)priv->lv2entcnt, 0);
1000 static int rockchip_iommu_domain_init(struct iommu_domain *domain)
1002 struct rk_iommu_domain *priv;
1004 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
1008 /*rk32xx iommu use 2 level pagetable,
1009 level1 and leve2 both have 1024 entries,each entry occupy 4 bytes,
1010 so alloc a page size for each page table
1012 priv->pgtable = (unsigned long *)__get_free_pages(GFP_KERNEL |
1017 priv->lv2entcnt = (short *)__get_free_pages(GFP_KERNEL |
1019 if (!priv->lv2entcnt)
1022 rockchip_pgtable_flush(priv->pgtable, priv->pgtable + NUM_LV1ENTRIES);
1024 spin_lock_init(&priv->lock);
1025 spin_lock_init(&priv->pgtablelock);
1026 INIT_LIST_HEAD(&priv->clients);
1028 domain->priv = priv;
1032 free_pages((unsigned long)priv->pgtable, 0);
1038 static struct iommu_ops rk_iommu_ops = {
1039 .domain_init = &rockchip_iommu_domain_init,
1040 .domain_destroy = &rockchip_iommu_domain_destroy,
1041 .attach_dev = &rockchip_iommu_attach_device,
1042 .detach_dev = &rockchip_iommu_detach_device,
1043 .map = &rockchip_iommu_map,
1044 .unmap = &rockchip_iommu_unmap,
1045 .iova_to_phys = &rockchip_iommu_iova_to_phys,
1046 .pgsize_bitmap = SPAGE_SIZE,
1049 static int rockchip_get_iommu_resource_num(struct platform_device *pdev,
1055 for (i = 0; i < pdev->num_resources; i++) {
1056 struct resource *r = &pdev->resource[i];
1057 if (type == resource_type(r))
1064 static int rockchip_iommu_probe(struct platform_device *pdev)
1068 struct iommu_drvdata *data;
1072 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
1074 dev_dbg(dev, "Not enough memory\n");
1078 dev_set_drvdata(dev, data);
1080 if (pdev->dev.of_node)
1081 of_property_read_string(pdev->dev.of_node, "dbgname",
1084 dev_dbg(dev, "dbgname not assigned in device tree or device node not exist\r\n");
1086 dev_info(dev,"(%s) Enter\n", data->dbgname);
1088 data->num_res_mem = rockchip_get_iommu_resource_num(pdev,
1090 if (0 == data->num_res_mem) {
1091 dev_err(dev,"can't find iommu memory resource \r\n");
1094 dev_dbg(dev,"data->num_res_mem=%d\n", data->num_res_mem);
1096 data->num_res_irq = rockchip_get_iommu_resource_num(pdev,
1098 if (0 == data->num_res_irq) {
1099 dev_err(dev,"can't find iommu irq resource \r\n");
1102 dev_dbg(dev,"data->num_res_irq=%d\n", data->num_res_irq);
1104 data->res_bases = devm_kmalloc_array(dev, data->num_res_mem,
1105 sizeof(*data->res_bases), GFP_KERNEL);
1106 if (data->res_bases == NULL) {
1107 dev_err(dev, "Not enough memory\n");
1111 for (i = 0; i < data->num_res_mem; i++) {
1112 struct resource *res;
1114 res = platform_get_resource(pdev, IORESOURCE_MEM, i);
1116 dev_err(dev,"Unable to find IOMEM region\n");
1120 data->res_bases[i] = devm_ioremap(dev,res->start,
1121 resource_size(res));
1122 if (!data->res_bases[i]) {
1123 dev_err(dev, "Unable to map IOMEM @ PA:%#x\n",
1128 dev_dbg(dev,"res->start = 0x%08x ioremap to data->res_bases[%d] = 0x%08x\n",
1129 res->start, i, (unsigned int)data->res_bases[i]);
1131 if (strstr(data->dbgname, "vop") &&
1132 (soc_is_rk3128() || soc_is_rk3126())) {
1133 rk312x_vop_mmu_base = data->res_bases[0];
1134 dev_dbg(dev, "rk312x_vop_mmu_base = 0x%08x\n",
1135 (unsigned int)rk312x_vop_mmu_base);
1139 for (i = 0; i < data->num_res_irq; i++) {
1140 if ((soc_is_rk3128() || soc_is_rk3126()) &&
1141 strstr(data->dbgname, "vop")) {
1142 dev_info(dev, "skip request vop mmu irq\n");
1146 ret = platform_get_irq(pdev, i);
1148 dev_err(dev,"Unable to find IRQ resource\n");
1152 ret = devm_request_irq(dev, ret, rockchip_iommu_irq,
1153 IRQF_SHARED, dev_name(dev), data);
1155 dev_err(dev, "Unabled to register interrupt handler\n");
1160 ret = rockchip_init_iovmm(dev, &data->vmm);
1165 spin_lock_init(&data->data_lock);
1166 INIT_LIST_HEAD(&data->node);
1168 dev_info(dev,"(%s) Initialized\n", data->dbgname);
1174 static const struct of_device_id iommu_dt_ids[] = {
1175 { .compatible = IEP_IOMMU_COMPATIBLE_NAME},
1176 { .compatible = VIP_IOMMU_COMPATIBLE_NAME},
1177 { .compatible = VOPB_IOMMU_COMPATIBLE_NAME},
1178 { .compatible = VOPL_IOMMU_COMPATIBLE_NAME},
1179 { .compatible = HEVC_IOMMU_COMPATIBLE_NAME},
1180 { .compatible = VPU_IOMMU_COMPATIBLE_NAME},
1181 { .compatible = ISP_IOMMU_COMPATIBLE_NAME},
1182 { .compatible = VOP_IOMMU_COMPATIBLE_NAME},
1186 MODULE_DEVICE_TABLE(of, iommu_dt_ids);
1189 static struct platform_driver rk_iommu_driver = {
1190 .probe = rockchip_iommu_probe,
1194 .owner = THIS_MODULE,
1195 .of_match_table = of_match_ptr(iommu_dt_ids),
1199 static int __init rockchip_iommu_init_driver(void)
1203 lv2table_kmem_cache = kmem_cache_create("rk-iommu-lv2table",
1204 LV2TABLE_SIZE, LV2TABLE_SIZE,
1206 if (!lv2table_kmem_cache) {
1207 pr_info("%s: failed to create kmem cache\n", __func__);
1211 ret = bus_set_iommu(&platform_bus_type, &rk_iommu_ops);
1215 return platform_driver_register(&rk_iommu_driver);
1218 core_initcall(rockchip_iommu_init_driver);