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path: root/drivers/misc/cxl
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Diffstat (limited to 'drivers/misc/cxl')
-rw-r--r--drivers/misc/cxl/context.c6
-rw-r--r--drivers/misc/cxl/cxl.h18
-rw-r--r--drivers/misc/cxl/fault.c23
-rw-r--r--drivers/misc/cxl/file.c7
-rw-r--r--drivers/misc/cxl/main.c17
-rw-r--r--drivers/misc/cxl/native.c43
-rw-r--r--drivers/misc/cxl/pci.c11
7 files changed, 70 insertions, 55 deletions
diff --git a/drivers/misc/cxl/context.c b/drivers/misc/cxl/context.c
index 4472ce11f98d..8c32040b9c09 100644
--- a/drivers/misc/cxl/context.c
+++ b/drivers/misc/cxl/context.c
@@ -45,7 +45,7 @@ int cxl_context_init(struct cxl_context *ctx, struct cxl_afu *afu, bool master)
mutex_init(&ctx->mapping_lock);
ctx->mapping = NULL;
- if (cxl_is_psl8(afu)) {
+ if (cxl_is_power8()) {
spin_lock_init(&ctx->sste_lock);
/*
@@ -189,7 +189,7 @@ int cxl_context_iomap(struct cxl_context *ctx, struct vm_area_struct *vma)
if (start + len > ctx->afu->adapter->ps_size)
return -EINVAL;
- if (cxl_is_psl9(ctx->afu)) {
+ if (cxl_is_power9()) {
/*
* Make sure there is a valid problem state
* area space for this AFU.
@@ -324,7 +324,7 @@ static void reclaim_ctx(struct rcu_head *rcu)
{
struct cxl_context *ctx = container_of(rcu, struct cxl_context, rcu);
- if (cxl_is_psl8(ctx->afu))
+ if (cxl_is_power8())
free_page((u64)ctx->sstp);
if (ctx->ff_page)
__free_page(ctx->ff_page);
diff --git a/drivers/misc/cxl/cxl.h b/drivers/misc/cxl/cxl.h
index c8568ea7c518..a03f8e7535e5 100644
--- a/drivers/misc/cxl/cxl.h
+++ b/drivers/misc/cxl/cxl.h
@@ -357,6 +357,7 @@ static const cxl_p2n_reg_t CXL_PSL_WED_An = {0x0A0};
#define CXL_PSL9_DSISR_An_PF_RGP 0x0000000000000090ULL /* PTE not found (Radix Guest (parent)) 0b10010000 */
#define CXL_PSL9_DSISR_An_PF_HRH 0x0000000000000094ULL /* PTE not found (HPT/Radix Host) 0b10010100 */
#define CXL_PSL9_DSISR_An_PF_STEG 0x000000000000009CULL /* PTE not found (STEG VA) 0b10011100 */
+#define CXL_PSL9_DSISR_An_URTCH 0x00000000000000B4ULL /* Unsupported Radix Tree Configuration 0b10110100 */
/****** CXL_PSL_TFC_An ******************************************************/
#define CXL_PSL_TFC_An_A (1ull << (63-28)) /* Acknowledge non-translation fault */
@@ -844,24 +845,15 @@ static inline bool cxl_is_power8(void)
static inline bool cxl_is_power9(void)
{
- /* intermediate solution */
- if (!cxl_is_power8() &&
- (cpu_has_feature(CPU_FTRS_POWER9) ||
- cpu_has_feature(CPU_FTR_POWER9_DD1)))
+ if (pvr_version_is(PVR_POWER9))
return true;
return false;
}
-static inline bool cxl_is_psl8(struct cxl_afu *afu)
+static inline bool cxl_is_power9_dd1(void)
{
- if (afu->adapter->caia_major == 1)
- return true;
- return false;
-}
-
-static inline bool cxl_is_psl9(struct cxl_afu *afu)
-{
- if (afu->adapter->caia_major == 2)
+ if ((pvr_version_is(PVR_POWER9)) &&
+ cpu_has_feature(CPU_FTR_POWER9_DD1))
return true;
return false;
}
diff --git a/drivers/misc/cxl/fault.c b/drivers/misc/cxl/fault.c
index 5344448f514e..c79e39bad7a4 100644
--- a/drivers/misc/cxl/fault.c
+++ b/drivers/misc/cxl/fault.c
@@ -187,7 +187,7 @@ static struct mm_struct *get_mem_context(struct cxl_context *ctx)
static bool cxl_is_segment_miss(struct cxl_context *ctx, u64 dsisr)
{
- if ((cxl_is_psl8(ctx->afu)) && (dsisr & CXL_PSL_DSISR_An_DS))
+ if ((cxl_is_power8() && (dsisr & CXL_PSL_DSISR_An_DS)))
return true;
return false;
@@ -195,16 +195,23 @@ static bool cxl_is_segment_miss(struct cxl_context *ctx, u64 dsisr)
static bool cxl_is_page_fault(struct cxl_context *ctx, u64 dsisr)
{
- if ((cxl_is_psl8(ctx->afu)) && (dsisr & CXL_PSL_DSISR_An_DM))
- return true;
+ u64 crs; /* Translation Checkout Response Status */
- if ((cxl_is_psl9(ctx->afu)) &&
- ((dsisr & CXL_PSL9_DSISR_An_CO_MASK) &
- (CXL_PSL9_DSISR_An_PF_SLR | CXL_PSL9_DSISR_An_PF_RGC |
- CXL_PSL9_DSISR_An_PF_RGP | CXL_PSL9_DSISR_An_PF_HRH |
- CXL_PSL9_DSISR_An_PF_STEG)))
+ if ((cxl_is_power8()) && (dsisr & CXL_PSL_DSISR_An_DM))
return true;
+ if (cxl_is_power9()) {
+ crs = (dsisr & CXL_PSL9_DSISR_An_CO_MASK);
+ if ((crs == CXL_PSL9_DSISR_An_PF_SLR) ||
+ (crs == CXL_PSL9_DSISR_An_PF_RGC) ||
+ (crs == CXL_PSL9_DSISR_An_PF_RGP) ||
+ (crs == CXL_PSL9_DSISR_An_PF_HRH) ||
+ (crs == CXL_PSL9_DSISR_An_PF_STEG) ||
+ (crs == CXL_PSL9_DSISR_An_URTCH)) {
+ return true;
+ }
+ }
+
return false;
}
diff --git a/drivers/misc/cxl/file.c b/drivers/misc/cxl/file.c
index 17b433f1ce23..0761271d68c5 100644
--- a/drivers/misc/cxl/file.c
+++ b/drivers/misc/cxl/file.c
@@ -159,11 +159,8 @@ static long afu_ioctl_start_work(struct cxl_context *ctx,
/* Do this outside the status_mutex to avoid a circular dependency with
* the locking in cxl_mmap_fault() */
- if (copy_from_user(&work, uwork,
- sizeof(struct cxl_ioctl_start_work))) {
- rc = -EFAULT;
- goto out;
- }
+ if (copy_from_user(&work, uwork, sizeof(work)))
+ return -EFAULT;
mutex_lock(&ctx->status_mutex);
if (ctx->status != OPENED) {
diff --git a/drivers/misc/cxl/main.c b/drivers/misc/cxl/main.c
index 1703655072b1..c1ba0d42cbc8 100644
--- a/drivers/misc/cxl/main.c
+++ b/drivers/misc/cxl/main.c
@@ -329,8 +329,15 @@ static int __init init_cxl(void)
cxl_debugfs_init();
- if ((rc = register_cxl_calls(&cxl_calls)))
- goto err;
+ /*
+ * we don't register the callback on P9. slb callack is only
+ * used for the PSL8 MMU and CX4.
+ */
+ if (cxl_is_power8()) {
+ rc = register_cxl_calls(&cxl_calls);
+ if (rc)
+ goto err;
+ }
if (cpu_has_feature(CPU_FTR_HVMODE)) {
cxl_ops = &cxl_native_ops;
@@ -347,7 +354,8 @@ static int __init init_cxl(void)
return 0;
err1:
- unregister_cxl_calls(&cxl_calls);
+ if (cxl_is_power8())
+ unregister_cxl_calls(&cxl_calls);
err:
cxl_debugfs_exit();
cxl_file_exit();
@@ -366,7 +374,8 @@ static void exit_cxl(void)
cxl_debugfs_exit();
cxl_file_exit();
- unregister_cxl_calls(&cxl_calls);
+ if (cxl_is_power8())
+ unregister_cxl_calls(&cxl_calls);
idr_destroy(&cxl_adapter_idr);
}
diff --git a/drivers/misc/cxl/native.c b/drivers/misc/cxl/native.c
index 871a2f09c718..2b2f8894149d 100644
--- a/drivers/misc/cxl/native.c
+++ b/drivers/misc/cxl/native.c
@@ -105,11 +105,16 @@ static int native_afu_reset(struct cxl_afu *afu)
CXL_AFU_Cntl_An_RS_MASK | CXL_AFU_Cntl_An_ES_MASK,
false);
- /* Re-enable any masked interrupts */
- serr = cxl_p1n_read(afu, CXL_PSL_SERR_An);
- serr &= ~CXL_PSL_SERR_An_IRQ_MASKS;
- cxl_p1n_write(afu, CXL_PSL_SERR_An, serr);
-
+ /*
+ * Re-enable any masked interrupts when the AFU is not
+ * activated to avoid side effects after attaching a process
+ * in dedicated mode.
+ */
+ if (afu->current_mode == 0) {
+ serr = cxl_p1n_read(afu, CXL_PSL_SERR_An);
+ serr &= ~CXL_PSL_SERR_An_IRQ_MASKS;
+ cxl_p1n_write(afu, CXL_PSL_SERR_An, serr);
+ }
return rc;
}
@@ -139,9 +144,9 @@ int cxl_psl_purge(struct cxl_afu *afu)
pr_devel("PSL purge request\n");
- if (cxl_is_psl8(afu))
+ if (cxl_is_power8())
trans_fault = CXL_PSL_DSISR_TRANS;
- if (cxl_is_psl9(afu))
+ if (cxl_is_power9())
trans_fault = CXL_PSL9_DSISR_An_TF;
if (!cxl_ops->link_ok(afu->adapter, afu)) {
@@ -603,7 +608,7 @@ static u64 calculate_sr(struct cxl_context *ctx)
if (!test_tsk_thread_flag(current, TIF_32BIT))
sr |= CXL_PSL_SR_An_SF;
}
- if (cxl_is_psl9(ctx->afu)) {
+ if (cxl_is_power9()) {
if (radix_enabled())
sr |= CXL_PSL_SR_An_XLAT_ror;
else
@@ -1117,10 +1122,10 @@ static irqreturn_t native_handle_psl_slice_error(struct cxl_context *ctx,
static bool cxl_is_translation_fault(struct cxl_afu *afu, u64 dsisr)
{
- if ((cxl_is_psl8(afu)) && (dsisr & CXL_PSL_DSISR_TRANS))
+ if ((cxl_is_power8()) && (dsisr & CXL_PSL_DSISR_TRANS))
return true;
- if ((cxl_is_psl9(afu)) && (dsisr & CXL_PSL9_DSISR_An_TF))
+ if ((cxl_is_power9()) && (dsisr & CXL_PSL9_DSISR_An_TF))
return true;
return false;
@@ -1194,10 +1199,10 @@ static void native_irq_wait(struct cxl_context *ctx)
if (ph != ctx->pe)
return;
dsisr = cxl_p2n_read(ctx->afu, CXL_PSL_DSISR_An);
- if (cxl_is_psl8(ctx->afu) &&
+ if (cxl_is_power8() &&
((dsisr & CXL_PSL_DSISR_PENDING) == 0))
return;
- if (cxl_is_psl9(ctx->afu) &&
+ if (cxl_is_power9() &&
((dsisr & CXL_PSL9_DSISR_PENDING) == 0))
return;
/*
@@ -1302,13 +1307,16 @@ int cxl_native_register_psl_err_irq(struct cxl *adapter)
void cxl_native_release_psl_err_irq(struct cxl *adapter)
{
- if (adapter->native->err_virq != irq_find_mapping(NULL, adapter->native->err_hwirq))
+ if (adapter->native->err_virq == 0 ||
+ adapter->native->err_virq !=
+ irq_find_mapping(NULL, adapter->native->err_hwirq))
return;
cxl_p1_write(adapter, CXL_PSL_ErrIVTE, 0x0000000000000000);
cxl_unmap_irq(adapter->native->err_virq, adapter);
cxl_ops->release_one_irq(adapter, adapter->native->err_hwirq);
kfree(adapter->irq_name);
+ adapter->native->err_virq = 0;
}
int cxl_native_register_serr_irq(struct cxl_afu *afu)
@@ -1346,13 +1354,15 @@ int cxl_native_register_serr_irq(struct cxl_afu *afu)
void cxl_native_release_serr_irq(struct cxl_afu *afu)
{
- if (afu->serr_virq != irq_find_mapping(NULL, afu->serr_hwirq))
+ if (afu->serr_virq == 0 ||
+ afu->serr_virq != irq_find_mapping(NULL, afu->serr_hwirq))
return;
cxl_p1n_write(afu, CXL_PSL_SERR_An, 0x0000000000000000);
cxl_unmap_irq(afu->serr_virq, afu);
cxl_ops->release_one_irq(afu->adapter, afu->serr_hwirq);
kfree(afu->err_irq_name);
+ afu->serr_virq = 0;
}
int cxl_native_register_psl_irq(struct cxl_afu *afu)
@@ -1375,12 +1385,15 @@ int cxl_native_register_psl_irq(struct cxl_afu *afu)
void cxl_native_release_psl_irq(struct cxl_afu *afu)
{
- if (afu->native->psl_virq != irq_find_mapping(NULL, afu->native->psl_hwirq))
+ if (afu->native->psl_virq == 0 ||
+ afu->native->psl_virq !=
+ irq_find_mapping(NULL, afu->native->psl_hwirq))
return;
cxl_unmap_irq(afu->native->psl_virq, afu);
cxl_ops->release_one_irq(afu->adapter, afu->native->psl_hwirq);
kfree(afu->psl_irq_name);
+ afu->native->psl_virq = 0;
}
static void recover_psl_err(struct cxl_afu *afu, u64 errstat)
diff --git a/drivers/misc/cxl/pci.c b/drivers/misc/cxl/pci.c
index 6dc1ee5b92c9..1eb9859809bf 100644
--- a/drivers/misc/cxl/pci.c
+++ b/drivers/misc/cxl/pci.c
@@ -436,7 +436,7 @@ static int init_implementation_adapter_regs_psl9(struct cxl *adapter, struct pci
/* nMMU_ID Defaults to: b’000001001’*/
xsl_dsnctl |= ((u64)0x09 << (63-28));
- if (cxl_is_power9() && !cpu_has_feature(CPU_FTR_POWER9_DD1)) {
+ if (!(cxl_is_power9_dd1())) {
/*
* Used to identify CAPI packets which should be sorted into
* the Non-Blocking queues by the PHB. This field should match
@@ -491,7 +491,7 @@ static int init_implementation_adapter_regs_psl9(struct cxl *adapter, struct pci
cxl_p1_write(adapter, CXL_PSL9_APCDEDTYPE, 0x40000003FFFF0000ULL);
/* Disable vc dd1 fix */
- if ((cxl_is_power9() && cpu_has_feature(CPU_FTR_POWER9_DD1)))
+ if (cxl_is_power9_dd1())
cxl_p1_write(adapter, CXL_PSL9_GP_CT, 0x0400000000000001ULL);
return 0;
@@ -1439,8 +1439,7 @@ int cxl_pci_reset(struct cxl *adapter)
* The adapter is about to be reset, so ignore errors.
* Not supported on P9 DD1
*/
- if ((cxl_is_power8()) ||
- ((cxl_is_power9() && !cpu_has_feature(CPU_FTR_POWER9_DD1))))
+ if ((cxl_is_power8()) || (!(cxl_is_power9_dd1())))
cxl_data_cache_flush(adapter);
/* pcie_warm_reset requests a fundamental pci reset which includes a
@@ -1750,7 +1749,6 @@ static const struct cxl_service_layer_ops psl9_ops = {
.debugfs_add_adapter_regs = cxl_debugfs_add_adapter_regs_psl9,
.debugfs_add_afu_regs = cxl_debugfs_add_afu_regs_psl9,
.psl_irq_dump_registers = cxl_native_irq_dump_regs_psl9,
- .err_irq_dump_registers = cxl_native_err_irq_dump_regs,
.debugfs_stop_trace = cxl_stop_trace_psl9,
.write_timebase_ctrl = write_timebase_ctrl_psl9,
.timebase_read = timebase_read_psl9,
@@ -1889,8 +1887,7 @@ static void cxl_pci_remove_adapter(struct cxl *adapter)
* Flush adapter datacache as its about to be removed.
* Not supported on P9 DD1.
*/
- if ((cxl_is_power8()) ||
- ((cxl_is_power9() && !cpu_has_feature(CPU_FTR_POWER9_DD1))))
+ if ((cxl_is_power8()) || (!(cxl_is_power9_dd1())))
cxl_data_cache_flush(adapter);
cxl_deconfigure_adapter(adapter);
generated by cgit v1.2.3 (git 2.46.0) at 2025-10-31 06:55:50 +0000