1 /* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved.
3 * This program is free software; you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License version 2 and
5 * only version 2 as published by the Free Software Foundation.
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
18 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
19 #include <linux/kernel.h>
20 #include <linux/module.h>
21 #include <linux/platform_device.h>
22 #include <linux/errno.h>
24 #include <linux/interrupt.h>
25 #include <linux/list.h>
26 #include <linux/spinlock.h>
27 #include <linux/slab.h>
28 #include <linux/iommu.h>
29 #include <linux/clk.h>
30 #include <linux/err.h>
31 #include <linux/of_iommu.h>
33 #include <asm/cacheflush.h>
34 #include <asm/sizes.h>
36 #include "msm_iommu_hw-8xxx.h"
37 #include "msm_iommu.h"
38 #include "io-pgtable.h"
40 #define MRC(reg, processor, op1, crn, crm, op2) \
41 __asm__ __volatile__ ( \
42 " mrc " #processor "," #op1 ", %0," #crn "," #crm "," #op2 "\n" \
45 /* bitmap of the page sizes currently supported */
46 #define MSM_IOMMU_PGSIZES (SZ_4K | SZ_64K | SZ_1M | SZ_16M)
48 DEFINE_SPINLOCK(msm_iommu_lock);
49 static LIST_HEAD(qcom_iommu_devices);
50 static struct iommu_ops msm_iommu_ops;
53 struct list_head list_attached;
54 struct iommu_domain domain;
55 struct io_pgtable_cfg cfg;
56 struct io_pgtable_ops *iop;
58 spinlock_t pgtlock; /* pagetable lock */
61 static struct msm_priv *to_msm_priv(struct iommu_domain *dom)
63 return container_of(dom, struct msm_priv, domain);
66 static int __enable_clocks(struct msm_iommu_dev *iommu)
70 ret = clk_enable(iommu->pclk);
75 ret = clk_enable(iommu->clk);
77 clk_disable(iommu->pclk);
83 static void __disable_clocks(struct msm_iommu_dev *iommu)
86 clk_disable(iommu->clk);
87 clk_disable(iommu->pclk);
90 static void msm_iommu_reset(void __iomem *base, int ncb)
96 SET_ESRRESTORE(base, 0);
100 SET_TESTBUSCR(base, 0);
102 SET_GLOBAL_TLBIALL(base, 0);
103 SET_RPU_ACR(base, 0);
104 SET_TLBLKCRWE(base, 1);
106 for (ctx = 0; ctx < ncb; ctx++) {
107 SET_BPRCOSH(base, ctx, 0);
108 SET_BPRCISH(base, ctx, 0);
109 SET_BPRCNSH(base, ctx, 0);
110 SET_BPSHCFG(base, ctx, 0);
111 SET_BPMTCFG(base, ctx, 0);
112 SET_ACTLR(base, ctx, 0);
113 SET_SCTLR(base, ctx, 0);
114 SET_FSRRESTORE(base, ctx, 0);
115 SET_TTBR0(base, ctx, 0);
116 SET_TTBR1(base, ctx, 0);
117 SET_TTBCR(base, ctx, 0);
118 SET_BFBCR(base, ctx, 0);
119 SET_PAR(base, ctx, 0);
120 SET_FAR(base, ctx, 0);
121 SET_CTX_TLBIALL(base, ctx, 0);
122 SET_TLBFLPTER(base, ctx, 0);
123 SET_TLBSLPTER(base, ctx, 0);
124 SET_TLBLKCR(base, ctx, 0);
125 SET_CONTEXTIDR(base, ctx, 0);
129 static void __flush_iotlb(void *cookie)
131 struct msm_priv *priv = cookie;
132 struct msm_iommu_dev *iommu = NULL;
133 struct msm_iommu_ctx_dev *master;
136 list_for_each_entry(iommu, &priv->list_attached, dom_node) {
137 ret = __enable_clocks(iommu);
141 list_for_each_entry(master, &iommu->ctx_list, list)
142 SET_CTX_TLBIALL(iommu->base, master->num, 0);
144 __disable_clocks(iommu);
150 static void __flush_iotlb_range(unsigned long iova, size_t size,
151 size_t granule, bool leaf, void *cookie)
153 struct msm_priv *priv = cookie;
154 struct msm_iommu_dev *iommu = NULL;
155 struct msm_iommu_ctx_dev *master;
159 list_for_each_entry(iommu, &priv->list_attached, dom_node) {
160 ret = __enable_clocks(iommu);
164 list_for_each_entry(master, &iommu->ctx_list, list) {
168 iova |= GET_CONTEXTIDR_ASID(iommu->base,
170 SET_TLBIVA(iommu->base, master->num, iova);
172 } while (temp_size -= granule);
175 __disable_clocks(iommu);
182 static void __flush_iotlb_sync(void *cookie)
185 * Nothing is needed here, the barrier to guarantee
186 * completion of the tlb sync operation is implicitly
187 * taken care when the iommu client does a writel before
188 * kick starting the other master.
192 static const struct iommu_gather_ops msm_iommu_gather_ops = {
193 .tlb_flush_all = __flush_iotlb,
194 .tlb_add_flush = __flush_iotlb_range,
195 .tlb_sync = __flush_iotlb_sync,
198 static int msm_iommu_alloc_ctx(unsigned long *map, int start, int end)
203 idx = find_next_zero_bit(map, end, start);
206 } while (test_and_set_bit(idx, map));
211 static void msm_iommu_free_ctx(unsigned long *map, int idx)
216 static void config_mids(struct msm_iommu_dev *iommu,
217 struct msm_iommu_ctx_dev *master)
221 for (i = 0; i < master->num_mids; i++) {
222 mid = master->mids[i];
225 SET_M2VCBR_N(iommu->base, mid, 0);
226 SET_CBACR_N(iommu->base, ctx, 0);
229 SET_VMID(iommu->base, mid, 0);
231 /* Set the context number for that MID to this context */
232 SET_CBNDX(iommu->base, mid, ctx);
234 /* Set MID associated with this context bank to 0*/
235 SET_CBVMID(iommu->base, ctx, 0);
237 /* Set the ASID for TLB tagging for this context */
238 SET_CONTEXTIDR_ASID(iommu->base, ctx, ctx);
240 /* Set security bit override to be Non-secure */
241 SET_NSCFG(iommu->base, mid, 3);
245 static void __reset_context(void __iomem *base, int ctx)
247 SET_BPRCOSH(base, ctx, 0);
248 SET_BPRCISH(base, ctx, 0);
249 SET_BPRCNSH(base, ctx, 0);
250 SET_BPSHCFG(base, ctx, 0);
251 SET_BPMTCFG(base, ctx, 0);
252 SET_ACTLR(base, ctx, 0);
253 SET_SCTLR(base, ctx, 0);
254 SET_FSRRESTORE(base, ctx, 0);
255 SET_TTBR0(base, ctx, 0);
256 SET_TTBR1(base, ctx, 0);
257 SET_TTBCR(base, ctx, 0);
258 SET_BFBCR(base, ctx, 0);
259 SET_PAR(base, ctx, 0);
260 SET_FAR(base, ctx, 0);
261 SET_CTX_TLBIALL(base, ctx, 0);
262 SET_TLBFLPTER(base, ctx, 0);
263 SET_TLBSLPTER(base, ctx, 0);
264 SET_TLBLKCR(base, ctx, 0);
267 static void __program_context(void __iomem *base, int ctx,
268 struct msm_priv *priv)
270 __reset_context(base, ctx);
272 /* Turn on TEX Remap */
273 SET_TRE(base, ctx, 1);
274 SET_AFE(base, ctx, 1);
276 /* Set up HTW mode */
277 /* TLB miss configuration: perform HTW on miss */
278 SET_TLBMCFG(base, ctx, 0x3);
280 /* V2P configuration: HTW for access */
281 SET_V2PCFG(base, ctx, 0x3);
283 SET_TTBCR(base, ctx, priv->cfg.arm_v7s_cfg.tcr);
284 SET_TTBR0(base, ctx, priv->cfg.arm_v7s_cfg.ttbr[0]);
285 SET_TTBR1(base, ctx, priv->cfg.arm_v7s_cfg.ttbr[1]);
287 /* Set prrr and nmrr */
288 SET_PRRR(base, ctx, priv->cfg.arm_v7s_cfg.prrr);
289 SET_NMRR(base, ctx, priv->cfg.arm_v7s_cfg.nmrr);
291 /* Invalidate the TLB for this context */
292 SET_CTX_TLBIALL(base, ctx, 0);
294 /* Set interrupt number to "secure" interrupt */
295 SET_IRPTNDX(base, ctx, 0);
297 /* Enable context fault interrupt */
298 SET_CFEIE(base, ctx, 1);
300 /* Stall access on a context fault and let the handler deal with it */
301 SET_CFCFG(base, ctx, 1);
303 /* Redirect all cacheable requests to L2 slave port. */
304 SET_RCISH(base, ctx, 1);
305 SET_RCOSH(base, ctx, 1);
306 SET_RCNSH(base, ctx, 1);
308 /* Turn on BFB prefetch */
309 SET_BFBDFE(base, ctx, 1);
315 static struct iommu_domain *msm_iommu_domain_alloc(unsigned type)
317 struct msm_priv *priv;
319 if (type != IOMMU_DOMAIN_UNMANAGED)
322 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
326 INIT_LIST_HEAD(&priv->list_attached);
328 priv->domain.geometry.aperture_start = 0;
329 priv->domain.geometry.aperture_end = (1ULL << 32) - 1;
330 priv->domain.geometry.force_aperture = true;
332 return &priv->domain;
339 static void msm_iommu_domain_free(struct iommu_domain *domain)
341 struct msm_priv *priv;
344 spin_lock_irqsave(&msm_iommu_lock, flags);
345 priv = to_msm_priv(domain);
347 spin_unlock_irqrestore(&msm_iommu_lock, flags);
350 static int msm_iommu_domain_config(struct msm_priv *priv)
352 spin_lock_init(&priv->pgtlock);
354 priv->cfg = (struct io_pgtable_cfg) {
355 .quirks = IO_PGTABLE_QUIRK_TLBI_ON_MAP,
356 .pgsize_bitmap = msm_iommu_ops.pgsize_bitmap,
359 .tlb = &msm_iommu_gather_ops,
360 .iommu_dev = priv->dev,
363 priv->iop = alloc_io_pgtable_ops(ARM_V7S, &priv->cfg, priv);
365 dev_err(priv->dev, "Failed to allocate pgtable\n");
369 msm_iommu_ops.pgsize_bitmap = priv->cfg.pgsize_bitmap;
374 /* Must be called under msm_iommu_lock */
375 static struct msm_iommu_dev *find_iommu_for_dev(struct device *dev)
377 struct msm_iommu_dev *iommu, *ret = NULL;
378 struct msm_iommu_ctx_dev *master;
380 list_for_each_entry(iommu, &qcom_iommu_devices, dev_node) {
381 master = list_first_entry(&iommu->ctx_list,
382 struct msm_iommu_ctx_dev,
384 if (master->of_node == dev->of_node) {
393 static int msm_iommu_add_device(struct device *dev)
395 struct msm_iommu_dev *iommu;
396 struct iommu_group *group;
400 spin_lock_irqsave(&msm_iommu_lock, flags);
402 iommu = find_iommu_for_dev(dev);
404 iommu_device_link(&iommu->iommu, dev);
408 spin_unlock_irqrestore(&msm_iommu_lock, flags);
413 group = iommu_group_get_for_dev(dev);
415 return PTR_ERR(group);
417 iommu_group_put(group);
422 static void msm_iommu_remove_device(struct device *dev)
424 struct msm_iommu_dev *iommu;
427 spin_lock_irqsave(&msm_iommu_lock, flags);
429 iommu = find_iommu_for_dev(dev);
431 iommu_device_unlink(&iommu->iommu, dev);
433 spin_unlock_irqrestore(&msm_iommu_lock, flags);
435 iommu_group_remove_device(dev);
438 static int msm_iommu_attach_dev(struct iommu_domain *domain, struct device *dev)
442 struct msm_iommu_dev *iommu;
443 struct msm_priv *priv = to_msm_priv(domain);
444 struct msm_iommu_ctx_dev *master;
447 msm_iommu_domain_config(priv);
449 spin_lock_irqsave(&msm_iommu_lock, flags);
450 list_for_each_entry(iommu, &qcom_iommu_devices, dev_node) {
451 master = list_first_entry(&iommu->ctx_list,
452 struct msm_iommu_ctx_dev,
454 if (master->of_node == dev->of_node) {
455 ret = __enable_clocks(iommu);
459 list_for_each_entry(master, &iommu->ctx_list, list) {
461 dev_err(dev, "domain already attached");
466 msm_iommu_alloc_ctx(iommu->context_map,
468 if (IS_ERR_VALUE(master->num)) {
472 config_mids(iommu, master);
473 __program_context(iommu->base, master->num,
476 __disable_clocks(iommu);
477 list_add(&iommu->dom_node, &priv->list_attached);
482 spin_unlock_irqrestore(&msm_iommu_lock, flags);
487 static void msm_iommu_detach_dev(struct iommu_domain *domain,
490 struct msm_priv *priv = to_msm_priv(domain);
492 struct msm_iommu_dev *iommu;
493 struct msm_iommu_ctx_dev *master;
496 free_io_pgtable_ops(priv->iop);
498 spin_lock_irqsave(&msm_iommu_lock, flags);
499 list_for_each_entry(iommu, &priv->list_attached, dom_node) {
500 ret = __enable_clocks(iommu);
504 list_for_each_entry(master, &iommu->ctx_list, list) {
505 msm_iommu_free_ctx(iommu->context_map, master->num);
506 __reset_context(iommu->base, master->num);
508 __disable_clocks(iommu);
511 spin_unlock_irqrestore(&msm_iommu_lock, flags);
514 static int msm_iommu_map(struct iommu_domain *domain, unsigned long iova,
515 phys_addr_t pa, size_t len, int prot)
517 struct msm_priv *priv = to_msm_priv(domain);
521 spin_lock_irqsave(&priv->pgtlock, flags);
522 ret = priv->iop->map(priv->iop, iova, pa, len, prot);
523 spin_unlock_irqrestore(&priv->pgtlock, flags);
528 static size_t msm_iommu_unmap(struct iommu_domain *domain, unsigned long iova,
531 struct msm_priv *priv = to_msm_priv(domain);
534 spin_lock_irqsave(&priv->pgtlock, flags);
535 len = priv->iop->unmap(priv->iop, iova, len);
536 spin_unlock_irqrestore(&priv->pgtlock, flags);
541 static phys_addr_t msm_iommu_iova_to_phys(struct iommu_domain *domain,
544 struct msm_priv *priv;
545 struct msm_iommu_dev *iommu;
546 struct msm_iommu_ctx_dev *master;
551 spin_lock_irqsave(&msm_iommu_lock, flags);
553 priv = to_msm_priv(domain);
554 iommu = list_first_entry(&priv->list_attached,
555 struct msm_iommu_dev, dom_node);
557 if (list_empty(&iommu->ctx_list))
560 master = list_first_entry(&iommu->ctx_list,
561 struct msm_iommu_ctx_dev, list);
565 ret = __enable_clocks(iommu);
569 /* Invalidate context TLB */
570 SET_CTX_TLBIALL(iommu->base, master->num, 0);
571 SET_V2PPR(iommu->base, master->num, va & V2Pxx_VA);
573 par = GET_PAR(iommu->base, master->num);
575 /* We are dealing with a supersection */
576 if (GET_NOFAULT_SS(iommu->base, master->num))
577 ret = (par & 0xFF000000) | (va & 0x00FFFFFF);
578 else /* Upper 20 bits from PAR, lower 12 from VA */
579 ret = (par & 0xFFFFF000) | (va & 0x00000FFF);
581 if (GET_FAULT(iommu->base, master->num))
584 __disable_clocks(iommu);
586 spin_unlock_irqrestore(&msm_iommu_lock, flags);
590 static bool msm_iommu_capable(enum iommu_cap cap)
595 static void print_ctx_regs(void __iomem *base, int ctx)
597 unsigned int fsr = GET_FSR(base, ctx);
598 pr_err("FAR = %08x PAR = %08x\n",
599 GET_FAR(base, ctx), GET_PAR(base, ctx));
600 pr_err("FSR = %08x [%s%s%s%s%s%s%s%s%s%s]\n", fsr,
601 (fsr & 0x02) ? "TF " : "",
602 (fsr & 0x04) ? "AFF " : "",
603 (fsr & 0x08) ? "APF " : "",
604 (fsr & 0x10) ? "TLBMF " : "",
605 (fsr & 0x20) ? "HTWDEEF " : "",
606 (fsr & 0x40) ? "HTWSEEF " : "",
607 (fsr & 0x80) ? "MHF " : "",
608 (fsr & 0x10000) ? "SL " : "",
609 (fsr & 0x40000000) ? "SS " : "",
610 (fsr & 0x80000000) ? "MULTI " : "");
612 pr_err("FSYNR0 = %08x FSYNR1 = %08x\n",
613 GET_FSYNR0(base, ctx), GET_FSYNR1(base, ctx));
614 pr_err("TTBR0 = %08x TTBR1 = %08x\n",
615 GET_TTBR0(base, ctx), GET_TTBR1(base, ctx));
616 pr_err("SCTLR = %08x ACTLR = %08x\n",
617 GET_SCTLR(base, ctx), GET_ACTLR(base, ctx));
620 static void insert_iommu_master(struct device *dev,
621 struct msm_iommu_dev **iommu,
622 struct of_phandle_args *spec)
624 struct msm_iommu_ctx_dev *master = dev->archdata.iommu;
627 if (list_empty(&(*iommu)->ctx_list)) {
628 master = kzalloc(sizeof(*master), GFP_ATOMIC);
629 master->of_node = dev->of_node;
630 list_add(&master->list, &(*iommu)->ctx_list);
631 dev->archdata.iommu = master;
634 for (sid = 0; sid < master->num_mids; sid++)
635 if (master->mids[sid] == spec->args[0]) {
636 dev_warn(dev, "Stream ID 0x%hx repeated; ignoring\n",
641 master->mids[master->num_mids++] = spec->args[0];
644 static int qcom_iommu_of_xlate(struct device *dev,
645 struct of_phandle_args *spec)
647 struct msm_iommu_dev *iommu;
651 spin_lock_irqsave(&msm_iommu_lock, flags);
652 list_for_each_entry(iommu, &qcom_iommu_devices, dev_node)
653 if (iommu->dev->of_node == spec->np)
656 if (!iommu || iommu->dev->of_node != spec->np) {
661 insert_iommu_master(dev, &iommu, spec);
663 spin_unlock_irqrestore(&msm_iommu_lock, flags);
668 irqreturn_t msm_iommu_fault_handler(int irq, void *dev_id)
670 struct msm_iommu_dev *iommu = dev_id;
674 spin_lock(&msm_iommu_lock);
677 pr_err("Invalid device ID in context interrupt handler\n");
681 pr_err("Unexpected IOMMU page fault!\n");
682 pr_err("base = %08x\n", (unsigned int)iommu->base);
684 ret = __enable_clocks(iommu);
688 for (i = 0; i < iommu->ncb; i++) {
689 fsr = GET_FSR(iommu->base, i);
691 pr_err("Fault occurred in context %d.\n", i);
692 pr_err("Interesting registers:\n");
693 print_ctx_regs(iommu->base, i);
694 SET_FSR(iommu->base, i, 0x4000000F);
697 __disable_clocks(iommu);
699 spin_unlock(&msm_iommu_lock);
703 static struct iommu_ops msm_iommu_ops = {
704 .capable = msm_iommu_capable,
705 .domain_alloc = msm_iommu_domain_alloc,
706 .domain_free = msm_iommu_domain_free,
707 .attach_dev = msm_iommu_attach_dev,
708 .detach_dev = msm_iommu_detach_dev,
709 .map = msm_iommu_map,
710 .unmap = msm_iommu_unmap,
711 .map_sg = default_iommu_map_sg,
712 .iova_to_phys = msm_iommu_iova_to_phys,
713 .add_device = msm_iommu_add_device,
714 .remove_device = msm_iommu_remove_device,
715 .device_group = generic_device_group,
716 .pgsize_bitmap = MSM_IOMMU_PGSIZES,
717 .of_xlate = qcom_iommu_of_xlate,
720 static int msm_iommu_probe(struct platform_device *pdev)
723 resource_size_t ioaddr;
724 struct msm_iommu_dev *iommu;
727 iommu = devm_kzalloc(&pdev->dev, sizeof(*iommu), GFP_KERNEL);
731 iommu->dev = &pdev->dev;
732 INIT_LIST_HEAD(&iommu->ctx_list);
734 iommu->pclk = devm_clk_get(iommu->dev, "smmu_pclk");
735 if (IS_ERR(iommu->pclk)) {
736 dev_err(iommu->dev, "could not get smmu_pclk\n");
737 return PTR_ERR(iommu->pclk);
740 ret = clk_prepare(iommu->pclk);
742 dev_err(iommu->dev, "could not prepare smmu_pclk\n");
746 iommu->clk = devm_clk_get(iommu->dev, "iommu_clk");
747 if (IS_ERR(iommu->clk)) {
748 dev_err(iommu->dev, "could not get iommu_clk\n");
749 clk_unprepare(iommu->pclk);
750 return PTR_ERR(iommu->clk);
753 ret = clk_prepare(iommu->clk);
755 dev_err(iommu->dev, "could not prepare iommu_clk\n");
756 clk_unprepare(iommu->pclk);
760 r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
761 iommu->base = devm_ioremap_resource(iommu->dev, r);
762 if (IS_ERR(iommu->base)) {
763 dev_err(iommu->dev, "could not get iommu base\n");
764 ret = PTR_ERR(iommu->base);
769 iommu->irq = platform_get_irq(pdev, 0);
770 if (iommu->irq < 0) {
771 dev_err(iommu->dev, "could not get iommu irq\n");
776 ret = of_property_read_u32(iommu->dev->of_node, "qcom,ncb", &val);
778 dev_err(iommu->dev, "could not get ncb\n");
783 msm_iommu_reset(iommu->base, iommu->ncb);
784 SET_M(iommu->base, 0, 1);
785 SET_PAR(iommu->base, 0, 0);
786 SET_V2PCFG(iommu->base, 0, 1);
787 SET_V2PPR(iommu->base, 0, 0);
788 par = GET_PAR(iommu->base, 0);
789 SET_V2PCFG(iommu->base, 0, 0);
790 SET_M(iommu->base, 0, 0);
793 pr_err("Invalid PAR value detected\n");
798 ret = devm_request_threaded_irq(iommu->dev, iommu->irq, NULL,
799 msm_iommu_fault_handler,
800 IRQF_ONESHOT | IRQF_SHARED,
801 "msm_iommu_secure_irpt_handler",
804 pr_err("Request IRQ %d failed with ret=%d\n", iommu->irq, ret);
808 list_add(&iommu->dev_node, &qcom_iommu_devices);
810 ret = iommu_device_sysfs_add(&iommu->iommu, iommu->dev, NULL,
811 "msm-smmu.%pa", &ioaddr);
813 pr_err("Could not add msm-smmu at %pa to sysfs\n", &ioaddr);
817 iommu_device_set_ops(&iommu->iommu, &msm_iommu_ops);
818 iommu_device_set_fwnode(&iommu->iommu, &pdev->dev.of_node->fwnode);
820 ret = iommu_device_register(&iommu->iommu);
822 pr_err("Could not register msm-smmu at %pa\n", &ioaddr);
826 pr_info("device mapped at %p, irq %d with %d ctx banks\n",
827 iommu->base, iommu->irq, iommu->ncb);
831 clk_unprepare(iommu->clk);
832 clk_unprepare(iommu->pclk);
836 static const struct of_device_id msm_iommu_dt_match[] = {
837 { .compatible = "qcom,apq8064-iommu" },
841 static int msm_iommu_remove(struct platform_device *pdev)
843 struct msm_iommu_dev *iommu = platform_get_drvdata(pdev);
845 clk_unprepare(iommu->clk);
846 clk_unprepare(iommu->pclk);
850 static struct platform_driver msm_iommu_driver = {
853 .of_match_table = msm_iommu_dt_match,
855 .probe = msm_iommu_probe,
856 .remove = msm_iommu_remove,
859 static int __init msm_iommu_driver_init(void)
863 ret = platform_driver_register(&msm_iommu_driver);
865 pr_err("Failed to register IOMMU driver\n");
870 static void __exit msm_iommu_driver_exit(void)
872 platform_driver_unregister(&msm_iommu_driver);
875 subsys_initcall(msm_iommu_driver_init);
876 module_exit(msm_iommu_driver_exit);
878 static int __init msm_iommu_init(void)
880 bus_set_iommu(&platform_bus_type, &msm_iommu_ops);
884 static int __init msm_iommu_of_setup(struct device_node *np)
890 IOMMU_OF_DECLARE(msm_iommu_of, "qcom,apq8064-iommu", msm_iommu_of_setup);
892 MODULE_LICENSE("GPL v2");
893 MODULE_AUTHOR("Stepan Moskovchenko <stepanm@codeaurora.org>");