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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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iommu/omap: Move debugfs functions to omap-iommu-debug.c
The main OMAP IOMMU driver file has some helper functions used by the OMAP IOMMU debugfs functionality, and there is already a dedicated source file omap-iommu-debug.c dealing with these debugfs routines. Move all these functions to the omap-iommu-debug.c file, so that all the debugfs related routines are in one place. The move required exposing some new functions and moving some definitions to the internal omap-iommu.h header file. Signed-off-by: Suman Anna <s-anna@ti.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Suman Anna
Joerg Roedel
parent
0cdbf72716
commit
69c2c19632
@ -14,6 +14,7 @@
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#include <linux/io.h>
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#include <linux/slab.h>
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#include <linux/uaccess.h>
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#include <linux/pm_runtime.h>
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#include <linux/debugfs.h>
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#include <linux/platform_data/iommu-omap.h>
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@ -29,6 +30,59 @@ static inline bool is_omap_iommu_detached(struct omap_iommu *obj)
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return !obj->domain;
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}
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#define pr_reg(name) \
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do { \
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ssize_t bytes; \
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const char *str = "%20s: %08x\n"; \
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const int maxcol = 32; \
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bytes = snprintf(p, maxcol, str, __stringify(name), \
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iommu_read_reg(obj, MMU_##name)); \
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p += bytes; \
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len -= bytes; \
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if (len < maxcol) \
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goto out; \
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} while (0)
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static ssize_t
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omap2_iommu_dump_ctx(struct omap_iommu *obj, char *buf, ssize_t len)
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{
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char *p = buf;
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pr_reg(REVISION);
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pr_reg(IRQSTATUS);
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pr_reg(IRQENABLE);
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pr_reg(WALKING_ST);
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pr_reg(CNTL);
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pr_reg(FAULT_AD);
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pr_reg(TTB);
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pr_reg(LOCK);
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pr_reg(LD_TLB);
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pr_reg(CAM);
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pr_reg(RAM);
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pr_reg(GFLUSH);
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pr_reg(FLUSH_ENTRY);
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pr_reg(READ_CAM);
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pr_reg(READ_RAM);
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pr_reg(EMU_FAULT_AD);
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out:
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return p - buf;
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}
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static ssize_t omap_iommu_dump_ctx(struct omap_iommu *obj, char *buf,
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ssize_t bytes)
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{
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if (!obj || !buf)
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return -EINVAL;
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pm_runtime_get_sync(obj->dev);
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bytes = omap2_iommu_dump_ctx(obj, buf, bytes);
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pm_runtime_put_sync(obj->dev);
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return bytes;
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}
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static ssize_t debug_read_regs(struct file *file, char __user *userbuf,
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size_t count, loff_t *ppos)
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{
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@ -55,6 +109,63 @@ static ssize_t debug_read_regs(struct file *file, char __user *userbuf,
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return bytes;
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}
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static int
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__dump_tlb_entries(struct omap_iommu *obj, struct cr_regs *crs, int num)
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{
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int i;
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struct iotlb_lock saved;
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struct cr_regs tmp;
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struct cr_regs *p = crs;
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pm_runtime_get_sync(obj->dev);
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iotlb_lock_get(obj, &saved);
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for_each_iotlb_cr(obj, num, i, tmp) {
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if (!iotlb_cr_valid(&tmp))
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continue;
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*p++ = tmp;
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}
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iotlb_lock_set(obj, &saved);
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pm_runtime_put_sync(obj->dev);
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return p - crs;
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}
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static ssize_t iotlb_dump_cr(struct omap_iommu *obj, struct cr_regs *cr,
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char *buf)
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{
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char *p = buf;
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/* FIXME: Need more detail analysis of cam/ram */
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p += sprintf(p, "%08x %08x %01x\n", cr->cam, cr->ram,
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(cr->cam & MMU_CAM_P) ? 1 : 0);
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return p - buf;
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}
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static size_t omap_dump_tlb_entries(struct omap_iommu *obj, char *buf,
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ssize_t bytes)
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{
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int i, num;
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struct cr_regs *cr;
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char *p = buf;
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num = bytes / sizeof(*cr);
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num = min(obj->nr_tlb_entries, num);
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cr = kcalloc(num, sizeof(*cr), GFP_KERNEL);
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if (!cr)
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return 0;
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num = __dump_tlb_entries(obj, cr, num);
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for (i = 0; i < num; i++)
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p += iotlb_dump_cr(obj, cr + i, p);
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kfree(cr);
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return p - buf;
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}
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static ssize_t debug_read_tlb(struct file *file, char __user *userbuf,
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size_t count, loff_t *ppos)
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{
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@ -37,11 +37,6 @@
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#define to_iommu(dev) \
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((struct omap_iommu *)platform_get_drvdata(to_platform_device(dev)))
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#define for_each_iotlb_cr(obj, n, __i, cr) \
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for (__i = 0; \
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(__i < (n)) && (cr = __iotlb_read_cr((obj), __i), true); \
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__i++)
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/* bitmap of the page sizes currently supported */
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#define OMAP_IOMMU_PGSIZES (SZ_4K | SZ_64K | SZ_1M | SZ_16M)
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@ -71,11 +66,6 @@ struct omap_iommu_domain {
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#define MMU_LOCK_VICT(x) \
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((x & MMU_LOCK_VICT_MASK) >> MMU_LOCK_VICT_SHIFT)
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struct iotlb_lock {
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short base;
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short vict;
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};
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static struct platform_driver omap_iommu_driver;
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static struct kmem_cache *iopte_cachep;
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@ -212,14 +202,6 @@ static void iommu_disable(struct omap_iommu *obj)
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/*
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* TLB operations
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*/
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static inline int iotlb_cr_valid(struct cr_regs *cr)
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{
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if (!cr)
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return -EINVAL;
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return cr->cam & MMU_CAM_V;
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}
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static u32 iotlb_cr_to_virt(struct cr_regs *cr)
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{
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u32 page_size = cr->cam & MMU_CAM_PGSZ_MASK;
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@ -259,7 +241,7 @@ static u32 iommu_report_fault(struct omap_iommu *obj, u32 *da)
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return status;
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}
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static void iotlb_lock_get(struct omap_iommu *obj, struct iotlb_lock *l)
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void iotlb_lock_get(struct omap_iommu *obj, struct iotlb_lock *l)
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{
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u32 val;
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@ -267,10 +249,9 @@ static void iotlb_lock_get(struct omap_iommu *obj, struct iotlb_lock *l)
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l->base = MMU_LOCK_BASE(val);
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l->vict = MMU_LOCK_VICT(val);
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}
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static void iotlb_lock_set(struct omap_iommu *obj, struct iotlb_lock *l)
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void iotlb_lock_set(struct omap_iommu *obj, struct iotlb_lock *l)
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{
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u32 val;
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@ -296,7 +277,7 @@ static void iotlb_load_cr(struct omap_iommu *obj, struct cr_regs *cr)
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}
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/* only used in iotlb iteration for-loop */
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static struct cr_regs __iotlb_read_cr(struct omap_iommu *obj, int n)
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struct cr_regs __iotlb_read_cr(struct omap_iommu *obj, int n)
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{
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struct cr_regs cr;
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struct iotlb_lock l;
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@ -467,129 +448,6 @@ static void flush_iotlb_all(struct omap_iommu *obj)
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pm_runtime_put_sync(obj->dev);
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}
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#ifdef CONFIG_OMAP_IOMMU_DEBUG
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#define pr_reg(name) \
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do { \
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ssize_t bytes; \
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const char *str = "%20s: %08x\n"; \
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const int maxcol = 32; \
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bytes = snprintf(p, maxcol, str, __stringify(name), \
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iommu_read_reg(obj, MMU_##name)); \
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p += bytes; \
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len -= bytes; \
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if (len < maxcol) \
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goto out; \
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} while (0)
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static ssize_t
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omap2_iommu_dump_ctx(struct omap_iommu *obj, char *buf, ssize_t len)
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{
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char *p = buf;
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pr_reg(REVISION);
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pr_reg(IRQSTATUS);
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pr_reg(IRQENABLE);
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pr_reg(WALKING_ST);
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pr_reg(CNTL);
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pr_reg(FAULT_AD);
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pr_reg(TTB);
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pr_reg(LOCK);
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pr_reg(LD_TLB);
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pr_reg(CAM);
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pr_reg(RAM);
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pr_reg(GFLUSH);
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pr_reg(FLUSH_ENTRY);
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pr_reg(READ_CAM);
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pr_reg(READ_RAM);
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pr_reg(EMU_FAULT_AD);
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out:
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return p - buf;
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}
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ssize_t omap_iommu_dump_ctx(struct omap_iommu *obj, char *buf, ssize_t bytes)
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{
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if (!obj || !buf)
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return -EINVAL;
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pm_runtime_get_sync(obj->dev);
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bytes = omap2_iommu_dump_ctx(obj, buf, bytes);
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pm_runtime_put_sync(obj->dev);
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return bytes;
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}
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static int
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__dump_tlb_entries(struct omap_iommu *obj, struct cr_regs *crs, int num)
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{
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int i;
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struct iotlb_lock saved;
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struct cr_regs tmp;
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struct cr_regs *p = crs;
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pm_runtime_get_sync(obj->dev);
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iotlb_lock_get(obj, &saved);
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for_each_iotlb_cr(obj, num, i, tmp) {
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if (!iotlb_cr_valid(&tmp))
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continue;
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*p++ = tmp;
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}
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iotlb_lock_set(obj, &saved);
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pm_runtime_put_sync(obj->dev);
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return p - crs;
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}
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/**
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* iotlb_dump_cr - Dump an iommu tlb entry into buf
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* @obj: target iommu
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* @cr: contents of cam and ram register
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* @buf: output buffer
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**/
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static ssize_t iotlb_dump_cr(struct omap_iommu *obj, struct cr_regs *cr,
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char *buf)
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{
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char *p = buf;
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/* FIXME: Need more detail analysis of cam/ram */
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p += sprintf(p, "%08x %08x %01x\n", cr->cam, cr->ram,
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(cr->cam & MMU_CAM_P) ? 1 : 0);
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return p - buf;
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}
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/**
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* omap_dump_tlb_entries - dump cr arrays to given buffer
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* @obj: target iommu
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* @buf: output buffer
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**/
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size_t omap_dump_tlb_entries(struct omap_iommu *obj, char *buf, ssize_t bytes)
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{
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int i, num;
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struct cr_regs *cr;
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char *p = buf;
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num = bytes / sizeof(*cr);
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num = min(obj->nr_tlb_entries, num);
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cr = kcalloc(num, sizeof(*cr), GFP_KERNEL);
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if (!cr)
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return 0;
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num = __dump_tlb_entries(obj, cr, num);
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for (i = 0; i < num; i++)
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p += iotlb_dump_cr(obj, cr + i, p);
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kfree(cr);
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return p - buf;
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}
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#endif /* CONFIG_OMAP_IOMMU_DEBUG */
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/*
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* H/W pagetable operations
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*/
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@ -13,6 +13,11 @@
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#ifndef _OMAP_IOMMU_H
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#define _OMAP_IOMMU_H
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#define for_each_iotlb_cr(obj, n, __i, cr) \
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for (__i = 0; \
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(__i < (n)) && (cr = __iotlb_read_cr((obj), __i), true); \
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__i++)
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struct iotlb_entry {
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u32 da;
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u32 pa;
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@ -65,6 +70,11 @@ struct cr_regs {
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};
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};
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struct iotlb_lock {
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short base;
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short vict;
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};
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/**
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* dev_to_omap_iommu() - retrieves an omap iommu object from a user device
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* @dev: iommu client device
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@ -190,12 +200,12 @@ static inline struct omap_iommu *dev_to_omap_iommu(struct device *dev)
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/*
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* global functions
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*/
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#ifdef CONFIG_OMAP_IOMMU_DEBUG
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extern ssize_t
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omap_iommu_dump_ctx(struct omap_iommu *obj, char *buf, ssize_t len);
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extern size_t
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omap_dump_tlb_entries(struct omap_iommu *obj, char *buf, ssize_t len);
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struct cr_regs __iotlb_read_cr(struct omap_iommu *obj, int n);
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void iotlb_lock_get(struct omap_iommu *obj, struct iotlb_lock *l);
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void iotlb_lock_set(struct omap_iommu *obj, struct iotlb_lock *l);
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#ifdef CONFIG_OMAP_IOMMU_DEBUG
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void omap_iommu_debugfs_init(void);
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void omap_iommu_debugfs_exit(void);
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@ -222,4 +232,12 @@ static inline void iommu_write_reg(struct omap_iommu *obj, u32 val, size_t offs)
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__raw_writel(val, obj->regbase + offs);
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}
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static inline int iotlb_cr_valid(struct cr_regs *cr)
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{
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if (!cr)
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return -EINVAL;
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return cr->cam & MMU_CAM_V;
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}
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#endif /* _OMAP_IOMMU_H */
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