iommu: arm-smmu: add capturebus support for smmuv500
add a debugfs interface under /sys/kernel/debug/iommu/capturebus to support capture bus for smmuv500. Change-Id: Ibf2a2daf87941387c1b3f990f05d86a1cd4dbfff Signed-off-by: Vijayanand Jitta <vjitta@codeaurora.org>
This commit is contained in:
Vijayanand Jitta
parent
4fea97c643
commit
c4a7a0eca9
@ -223,3 +223,60 @@ void arm_smmu_debug_dump_tcu_testbus(struct device *dev, void __iomem *base,
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arm_smmu_debug_tcu_testbus_select(base, tcu_base,
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CLK_TESTBUS, READ, 0));
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}
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void arm_smmu_debug_set_tnx_tcr_cntl(void __iomem *tbu_base, u64 val)
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{
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writel_relaxed(val, tbu_base + ARM_SMMU_TNX_TCR_CNTL);
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}
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unsigned long arm_smmu_debug_get_tnx_tcr_cntl(void __iomem *tbu_base)
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{
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return readl_relaxed(tbu_base + ARM_SMMU_TNX_TCR_CNTL);
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}
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void arm_smmu_debug_set_mask_and_match(void __iomem *tbu_base, u64 sel,
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u64 mask, u64 match)
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{
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writeq_relaxed(mask, tbu_base + ARM_SMMU_CAPTURE1_MASK(sel));
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writeq_relaxed(match, tbu_base + ARM_SMMU_CAPTURE1_MATCH(sel));
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}
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void arm_smmu_debug_get_mask_and_match(void __iomem *tbu_base, u64 *mask,
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u64 *match)
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{
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int i;
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for (i = 0; i < NO_OF_MASK_AND_MATCH; ++i) {
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mask[i] = readq_relaxed(tbu_base +
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ARM_SMMU_CAPTURE1_MASK(i+1));
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match[i] = readq_relaxed(tbu_base +
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ARM_SMMU_CAPTURE1_MATCH(i+1));
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}
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}
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void arm_smmu_debug_get_capture_snapshot(void __iomem *tbu_base,
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u64 snapshot[NO_OF_CAPTURE_POINTS][REGS_PER_CAPTURE_POINT])
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{
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int valid, i, j;
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valid = readl_relaxed(tbu_base + APPS_SMMU_TNX_TCR_CNTL_2);
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for (i = 0; i < NO_OF_CAPTURE_POINTS ; ++i) {
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if (valid & (1 << i))
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for (j = 0; j < REGS_PER_CAPTURE_POINT; ++j)
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snapshot[i][j] = readq_relaxed(tbu_base +
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ARM_SMMU_CAPTURE_SNAPSHOT(i, j));
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else
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for (j = 0; j < REGS_PER_CAPTURE_POINT; ++j)
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snapshot[i][j] = 0xdededede;
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}
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}
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void arm_smmu_debug_clear_intr_and_validbits(void __iomem *tbu_base)
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{
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int val = 0;
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val |= INTR_CLR;
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val |= RESET_VALID;
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writel_relaxed(val, tbu_base + ARM_SMMU_TNX_TCR_CNTL);
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}
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@ -46,6 +46,18 @@ enum testbus_ops {
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TESTBUS_OUTPUT,
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};
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#define ARM_SMMU_TNX_TCR_CNTL 0x130
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#define ARM_SMMU_CAPTURE1_MASK(i) (0x100 + (0x8)*(i-1))
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#define ARM_SMMU_CAPTURE1_MATCH(i) (0x118 + (0x8)*(i-1))
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#define ARM_SMMU_CAPTURE_SNAPSHOT(i, j) ((0x138 + (0x10)*i) + j*0x8)
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#define APPS_SMMU_TNX_TCR_CNTL_2 0x178
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#define NO_OF_MASK_AND_MATCH 0x3
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#define NO_OF_CAPTURE_POINTS 0x4
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#define REGS_PER_CAPTURE_POINT 0x2
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#define INTR_CLR (1 << 0)
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#define RESET_VALID (1 << 7)
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#ifdef CONFIG_ARM_SMMU
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u32 arm_smmu_debug_tbu_testbus_select(void __iomem *tbu_base,
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@ -62,7 +74,16 @@ void arm_smmu_debug_dump_tbu_testbus(struct device *dev, void __iomem *tbu_base,
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u32 testbus_version);
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void arm_smmu_debug_dump_tcu_testbus(struct device *dev, void __iomem *base,
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void __iomem *tcu_base, int tcu_testbus_sel);
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void arm_smmu_debug_set_tnx_tcr_cntl(void __iomem *tbu_base, u64 val);
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unsigned long arm_smmu_debug_get_tnx_tcr_cntl(void __iomem *tbu_base);
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unsigned long arm_smmu_debug_get_tnx_tcr_cntl_2(void __iomem *tbu_base);
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void arm_smmu_debug_set_mask_and_match(void __iomem *tbu_base, u64 sel,
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u64 mask, u64 match);
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void arm_smmu_debug_get_mask_and_match(void __iomem *tbu_base,
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u64 *mask, u64 *match);
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void arm_smmu_debug_get_capture_snapshot(void __iomem *tbu_base,
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u64 snapshot[NO_OF_CAPTURE_POINTS][REGS_PER_CAPTURE_POINT]);
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void arm_smmu_debug_clear_intr_and_validbits(void __iomem *tbu_base);
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#else
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static inline u32 arm_smmu_debug_tbu_testbus_select(void __iomem *tbu_base,
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void __iomem *tcu_base, u32 testbus_version, bool write,
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@ -91,4 +112,28 @@ static inline void arm_smmu_debug_dump_tcu_testbus(struct device *dev,
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int tcu_testbus_sel)
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{
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}
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void arm_smmu_debug_set_tnx_tcr_cntl(void __iomem *tbu_base, u64 val)
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{
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}
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unsigned long arm_smmu_debug_get_tnx_tcr_cntl(void __iomem *tbu_base)
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{
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}
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unsigned long arm_smmu_debug_get_tnx_tcr_cntl_2(void __iomem *tbu_base)
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{
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}
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void arm_smmu_debug_set_mask_and_match(void __iomem *tbu_base, u64 sel,
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u64 mask, u64 match)
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{
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}
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void arm_smmu_debug_get_mask_and_match(void __iomem *tbu_base,
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u64 *mask, u64 *match)
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{
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}
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void arm_smmu_debug_get_capture_snapshot(void __iomem *tbu_base,
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u64 snapshot[NO_OF_CAPTURE_POINTS][REGS_PER_CAPTURE_POINT])
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{
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}
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void arm_smmu_debug_clear_intr_and_validbits(void __iomem *tbu_base)
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{
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}
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#endif
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@ -355,6 +355,7 @@ static int tbu_testbus_sel = TBU_TESTBUS_SEL_ALL;
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static int tcu_testbus_sel = TCU_TESTBUS_SEL_ALL;
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static struct dentry *debugfs_testbus_dir;
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static DEFINE_SPINLOCK(testbus_lock);
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static struct dentry *debugfs_capturebus_dir;
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module_param_named(tcu_testbus_sel, tcu_testbus_sel, int, 0644);
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module_param_named(tbu_testbus_sel, tbu_testbus_sel, int, 0644);
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@ -431,6 +432,7 @@ struct qsmmuv500_tbu_device {
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/* Protects halt count */
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spinlock_t halt_lock;
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u32 halt_count;
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unsigned int *irqs;
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};
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static atomic_t cavium_smmu_context_count = ATOMIC_INIT(0);
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@ -5924,6 +5926,263 @@ err:
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return 0;
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}
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static ssize_t arm_smmu_debug_capturebus_snapshot_read(struct file *file,
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char __user *ubuf, size_t count, loff_t *offset)
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{
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struct qsmmuv500_tbu_device *tbu = file->private_data;
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struct arm_smmu_device *smmu = tbu->smmu;
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void __iomem *tbu_base = tbu->base;
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u64 snapshot[NO_OF_CAPTURE_POINTS][REGS_PER_CAPTURE_POINT];
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char buf[400];
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ssize_t retval;
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size_t buflen;
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int buf_len = sizeof(buf);
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int i, j;
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if (*offset)
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return 0;
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memset(buf, 0, buf_len);
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arm_smmu_power_on(smmu->pwr);
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arm_smmu_power_on(tbu->pwr);
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arm_smmu_debug_get_capture_snapshot(tbu_base, snapshot);
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arm_smmu_power_off(tbu->pwr);
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arm_smmu_power_off(smmu->pwr);
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for (i = 0; i < NO_OF_CAPTURE_POINTS ; ++i) {
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for (j = 0; j < REGS_PER_CAPTURE_POINT; ++j) {
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snprintf(buf + strlen(buf), buf_len - strlen(buf),
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"Capture_%d_Snapshot_%d : 0x%0llx\n",
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i+1, j+1, snapshot[i][j]);
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}
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}
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buflen = min(count, strlen(buf));
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if (copy_to_user(ubuf, buf, buflen)) {
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pr_err_ratelimited("Couldn't copy_to_user\n");
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retval = -EFAULT;
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} else {
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*offset = 1;
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retval = buflen;
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}
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return retval;
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}
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static const struct file_operations arm_smmu_debug_capturebus_snapshot_fops = {
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.open = simple_open,
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.read = arm_smmu_debug_capturebus_snapshot_read,
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};
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static ssize_t arm_smmu_debug_capturebus_config_write(struct file *file,
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const char __user *ubuf, size_t count, loff_t *offset)
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{
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struct qsmmuv500_tbu_device *tbu = file->private_data;
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struct arm_smmu_device *smmu = tbu->smmu;
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void __iomem *tbu_base = tbu->base;
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char *comma1, *comma2;
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char buf[100];
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u64 sel, mask, match, val;
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if (count >= 100) {
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pr_err_ratelimited("Input too large\n");
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goto invalid_format;
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}
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memset(buf, 0, 100);
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if (copy_from_user(buf, ubuf, count)) {
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pr_err_ratelimited("Couldn't copy from user\n");
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return -EFAULT;
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}
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comma1 = strnchr(buf, count, ',');
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if (!comma1)
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goto invalid_format;
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*comma1 = '\0';
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if (kstrtou64(buf, 0, &sel))
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goto invalid_format;
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if (sel > 4) {
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goto invalid_format;
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} else if (sel == 4) {
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if (kstrtou64(comma1 + 1, 0, &val))
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goto invalid_format;
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goto program_capturebus;
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}
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comma2 = strnchr(comma1 + 1, count, ',');
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if (!comma2)
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goto invalid_format;
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/* split up the words */
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*comma2 = '\0';
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if (kstrtou64(comma1 + 1, 0, &mask))
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goto invalid_format;
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if (kstrtou64(comma2 + 1, 0, &match))
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goto invalid_format;
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program_capturebus:
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arm_smmu_power_on(smmu->pwr);
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arm_smmu_power_on(tbu->pwr);
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if (sel == 4)
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arm_smmu_debug_set_tnx_tcr_cntl(tbu_base, val);
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else
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arm_smmu_debug_set_mask_and_match(tbu_base, sel, mask, match);
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arm_smmu_power_off(tbu->pwr);
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arm_smmu_power_off(smmu->pwr);
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return count;
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invalid_format:
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pr_err_ratelimited("Invalid format. Expected: <1/2/3,Mask,Match> (or) <4,TNX_TCR_CNTL>>\n");
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return -EINVAL;
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}
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static ssize_t arm_smmu_debug_capturebus_config_read(struct file *file,
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char __user *ubuf, size_t count, loff_t *offset)
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{
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struct qsmmuv500_tbu_device *tbu = file->private_data;
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struct arm_smmu_device *smmu = tbu->smmu;
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void __iomem *tbu_base = tbu->base;
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unsigned long val;
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u64 mask[NO_OF_MASK_AND_MATCH], match[NO_OF_MASK_AND_MATCH];
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char buf[400];
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ssize_t retval;
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size_t buflen;
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int buf_len = sizeof(buf);
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int i;
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if (*offset)
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return 0;
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memset(buf, 0, buf_len);
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arm_smmu_power_on(smmu->pwr);
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arm_smmu_power_on(tbu->pwr);
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arm_smmu_debug_get_mask_and_match(tbu_base,
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mask, match);
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val = arm_smmu_debug_get_tnx_tcr_cntl(tbu_base);
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arm_smmu_power_off(tbu->pwr);
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arm_smmu_power_off(smmu->pwr);
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for (i = 0; i < NO_OF_MASK_AND_MATCH; ++i) {
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snprintf(buf + strlen(buf), buf_len - strlen(buf),
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"Mask_%d : 0x%0llx\t", i+1, mask[i]);
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snprintf(buf + strlen(buf), buf_len - strlen(buf),
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"Match_%d : 0x%0llx\n", i+1, match[i]);
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}
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snprintf(buf + strlen(buf), buf_len - strlen(buf), "0x%0x\n", val);
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buflen = min(count, strlen(buf));
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if (copy_to_user(ubuf, buf, buflen)) {
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pr_err_ratelimited("Couldn't copy_to_user\n");
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retval = -EFAULT;
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} else {
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*offset = 1;
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retval = buflen;
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}
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return retval;
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}
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static const struct file_operations arm_smmu_debug_capturebus_config_fops = {
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.open = simple_open,
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.write = arm_smmu_debug_capturebus_config_write,
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.read = arm_smmu_debug_capturebus_config_read,
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};
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static int qsmmuv500_capturebus_init(struct qsmmuv500_tbu_device *tbu)
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{
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struct dentry *capturebus_dir;
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if (!iommu_debugfs_top)
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return 0;
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if (!debugfs_capturebus_dir) {
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debugfs_capturebus_dir = debugfs_create_dir(
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"capturebus", iommu_debugfs_top);
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if (!debugfs_capturebus_dir) {
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pr_err_ratelimited("Couldn't create iommu/capturebus debugfs directory\n");
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return -ENODEV;
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}
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}
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capturebus_dir = debugfs_create_dir(dev_name(tbu->dev),
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debugfs_capturebus_dir);
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if (!capturebus_dir) {
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pr_err_ratelimited("Couldn't create iommu/capturebus/%s debugfs directory\n",
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dev_name(tbu->dev));
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goto err;
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}
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if (!debugfs_create_file("config", 0400, capturebus_dir, tbu,
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&arm_smmu_debug_capturebus_config_fops)) {
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pr_err_ratelimited("Couldn't create iommu/capturebus/%s/config debugfs file\n",
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dev_name(tbu->dev));
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goto err_rmdir;
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}
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if (!debugfs_create_file("snapshot", 0400, capturebus_dir, tbu,
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&arm_smmu_debug_capturebus_snapshot_fops)) {
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pr_err_ratelimited("Couldn't create iommu/capturebus/%s/snapshot debugfs file\n",
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dev_name(tbu->dev));
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goto err_rmdir;
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}
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return 0;
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err_rmdir:
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debugfs_remove_recursive(capturebus_dir);
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err:
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return 0;
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}
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static irqreturn_t arm_smmu_debug_capture_bus_match(int irq, void *dev)
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{
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struct qsmmuv500_tbu_device *tbu = dev;
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struct arm_smmu_device *smmu = tbu->smmu;
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void __iomem *tbu_base = tbu->base;
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u64 mask[NO_OF_MASK_AND_MATCH], match[NO_OF_MASK_AND_MATCH];
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u64 snapshot[NO_OF_CAPTURE_POINTS][REGS_PER_CAPTURE_POINT];
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int i, j, val;
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if (arm_smmu_power_on(smmu->pwr) || arm_smmu_power_on(tbu->pwr))
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return IRQ_NONE;
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val = arm_smmu_debug_get_tnx_tcr_cntl(tbu_base);
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arm_smmu_debug_get_mask_and_match(tbu_base, mask, match);
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arm_smmu_debug_get_capture_snapshot(tbu_base, snapshot);
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arm_smmu_debug_clear_intr_and_validbits(tbu_base);
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arm_smmu_power_off(tbu->pwr);
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arm_smmu_power_off(smmu->pwr);
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dev_info(tbu->dev, "TNX_TCR_CNTL : 0x%0llx\n", val);
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for (i = 0; i < NO_OF_MASK_AND_MATCH; ++i) {
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dev_info(tbu->dev,
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"Mask_%d : 0x%0llx\n", i+1, mask[i]);
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dev_info(tbu->dev,
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"Match_%d : 0x%0llx\n", i+1, match[i]);
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}
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for (i = 0; i < NO_OF_CAPTURE_POINTS ; ++i) {
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for (j = 0; j < REGS_PER_CAPTURE_POINT; ++j) {
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dev_info(tbu->dev,
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"Capture_%d_Snapshot_%d : 0x%0llx\n",
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i+1, j+1, snapshot[i][j]);
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}
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}
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return IRQ_HANDLED;
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}
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static int qsmmuv500_arch_init(struct arm_smmu_device *smmu)
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{
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struct resource *res;
|
||||
@ -6008,7 +6267,7 @@ static int qsmmuv500_tbu_probe(struct platform_device *pdev)
|
||||
struct device *dev = &pdev->dev;
|
||||
struct qsmmuv500_tbu_device *tbu;
|
||||
const __be32 *cell;
|
||||
int len;
|
||||
int len, i, err, num_irqs = 0;
|
||||
|
||||
tbu = devm_kzalloc(dev, sizeof(*tbu), GFP_KERNEL);
|
||||
if (!tbu)
|
||||
@ -6035,12 +6294,42 @@ static int qsmmuv500_tbu_probe(struct platform_device *pdev)
|
||||
tbu->sid_start = of_read_number(cell, 1);
|
||||
tbu->num_sids = of_read_number(cell + 1, 1);
|
||||
|
||||
while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, num_irqs)))
|
||||
num_irqs++;
|
||||
|
||||
tbu->irqs = devm_kzalloc(dev, sizeof(*tbu->irqs) * num_irqs,
|
||||
GFP_KERNEL);
|
||||
if (!tbu->irqs)
|
||||
return -ENOMEM;
|
||||
|
||||
for (i = 0; i < num_irqs; ++i) {
|
||||
int irq = platform_get_irq(pdev, i);
|
||||
|
||||
if (irq < 0) {
|
||||
dev_err(dev, "failed to get irq index %d\n", i);
|
||||
return -ENODEV;
|
||||
}
|
||||
tbu->irqs[i] = irq;
|
||||
|
||||
err = devm_request_threaded_irq(tbu->dev, tbu->irqs[i],
|
||||
NULL, arm_smmu_debug_capture_bus_match,
|
||||
IRQF_ONESHOT | IRQF_SHARED,
|
||||
"capture bus", tbu);
|
||||
if (err) {
|
||||
dev_err(dev, "failed to request capture bus irq%d (%u)\n",
|
||||
i, tbu->irqs[i]);
|
||||
return err;
|
||||
}
|
||||
}
|
||||
|
||||
tbu->pwr = arm_smmu_init_power_resources(pdev);
|
||||
if (IS_ERR(tbu->pwr))
|
||||
return PTR_ERR(tbu->pwr);
|
||||
|
||||
dev_set_drvdata(dev, tbu);
|
||||
|
||||
qsmmuv500_tbu_testbus_init(tbu);
|
||||
qsmmuv500_capturebus_init(tbu);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user