cxl: Move bare-metal specific code to specialized files
authorFrederic Barrat <fbarrat@linux.vnet.ibm.com>
Fri, 4 Mar 2016 11:26:26 +0000 (12:26 +0100)
committerMichael Ellerman <mpe@ellerman.id.au>
Wed, 9 Mar 2016 02:05:39 +0000 (13:05 +1100)
Move a few functions around to better separate code specific to
bare-metal environment from code which will be commonly used between
guest and bare-metal.

Code specific to bare-metal is meant to be in native.c or pci.c
only. It's basically anything which touches the card p1 registers,
some p2 registers not needed from a guest and the PCI interface.

Co-authored-by: Christophe Lombard <clombard@linux.vnet.ibm.com>
Signed-off-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com>
Signed-off-by: Christophe Lombard <clombard@linux.vnet.ibm.com>
Reviewed-by: Manoj Kumar <manoj@linux.vnet.ibm.com>
Acked-by: Ian Munsie <imunsie@au1.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
drivers/misc/cxl/cxl.h
drivers/misc/cxl/irq.c
drivers/misc/cxl/main.c
drivers/misc/cxl/native.c
drivers/misc/cxl/pci.c

index 3f88140..3b824e3 100644 (file)
@@ -623,23 +623,8 @@ static inline u64 cxl_p2n_read(struct cxl_afu *afu, cxl_p2n_reg_t reg)
                return ~0ULL;
 }
 
-static inline u64 cxl_afu_cr_read64(struct cxl_afu *afu, int cr, u64 off)
-{
-       if (likely(cxl_adapter_link_ok(afu->adapter)))
-               return in_le64((afu)->afu_desc_mmio + (afu)->crs_offset +
-                              ((cr) * (afu)->crs_len) + (off));
-       else
-               return ~0ULL;
-}
-
-static inline u32 cxl_afu_cr_read32(struct cxl_afu *afu, int cr, u64 off)
-{
-       if (likely(cxl_adapter_link_ok(afu->adapter)))
-               return in_le32((afu)->afu_desc_mmio + (afu)->crs_offset +
-                              ((cr) * (afu)->crs_len) + (off));
-       else
-               return 0xffffffff;
-}
+u64 cxl_afu_cr_read64(struct cxl_afu *afu, int cr, u64 off);
+u32 cxl_afu_cr_read32(struct cxl_afu *afu, int cr, u64 off);
 u16 cxl_afu_cr_read16(struct cxl_afu *afu, int cr, u64 off);
 u8 cxl_afu_cr_read8(struct cxl_afu *afu, int cr, u64 off);
 
@@ -654,7 +639,6 @@ struct cxl_calls {
 int register_cxl_calls(struct cxl_calls *calls);
 void unregister_cxl_calls(struct cxl_calls *calls);
 
-int cxl_alloc_adapter_nr(struct cxl *adapter);
 void cxl_remove_adapter_nr(struct cxl *adapter);
 
 int cxl_alloc_spa(struct cxl_afu *afu);
@@ -697,7 +681,8 @@ void cxl_release_serr_irq(struct cxl_afu *afu);
 int afu_register_irqs(struct cxl_context *ctx, u32 count);
 void afu_release_irqs(struct cxl_context *ctx, void *cookie);
 void afu_irq_name_free(struct cxl_context *ctx);
-irqreturn_t cxl_slice_irq_err(int irq, void *data);
+irqreturn_t handle_psl_slice_error(struct cxl_context *ctx, u64 dsisr,
+                               u64 errstat);
 
 int cxl_debugfs_init(void);
 void cxl_debugfs_exit(void);
@@ -746,7 +731,6 @@ int cxl_attach_process(struct cxl_context *ctx, bool kernel, u64 wed,
                            u64 amr);
 int cxl_detach_process(struct cxl_context *ctx);
 
-int cxl_get_irq(struct cxl_afu *afu, struct cxl_irq_info *info);
 int cxl_ack_irq(struct cxl_context *ctx, u64 tfc, u64 psl_reset_mask);
 
 int cxl_check_error(struct cxl_afu *afu);
index e468e6c..16fd67f 100644 (file)
 #include "cxl.h"
 #include "trace.h"
 
-/* XXX: This is implementation specific */
-static irqreturn_t handle_psl_slice_error(struct cxl_context *ctx, u64 dsisr, u64 errstat)
-{
-       u64 fir1, fir2, fir_slice, serr, afu_debug;
-
-       fir1 = cxl_p1_read(ctx->afu->adapter, CXL_PSL_FIR1);
-       fir2 = cxl_p1_read(ctx->afu->adapter, CXL_PSL_FIR2);
-       fir_slice = cxl_p1n_read(ctx->afu, CXL_PSL_FIR_SLICE_An);
-       serr = cxl_p1n_read(ctx->afu, CXL_PSL_SERR_An);
-       afu_debug = cxl_p1n_read(ctx->afu, CXL_AFU_DEBUG_An);
-
-       dev_crit(&ctx->afu->dev, "PSL ERROR STATUS: 0x%016llx\n", errstat);
-       dev_crit(&ctx->afu->dev, "PSL_FIR1: 0x%016llx\n", fir1);
-       dev_crit(&ctx->afu->dev, "PSL_FIR2: 0x%016llx\n", fir2);
-       dev_crit(&ctx->afu->dev, "PSL_SERR_An: 0x%016llx\n", serr);
-       dev_crit(&ctx->afu->dev, "PSL_FIR_SLICE_An: 0x%016llx\n", fir_slice);
-       dev_crit(&ctx->afu->dev, "CXL_PSL_AFU_DEBUG_An: 0x%016llx\n", afu_debug);
-
-       dev_crit(&ctx->afu->dev, "STOPPING CXL TRACE\n");
-       cxl_stop_trace(ctx->afu->adapter);
-
-       return cxl_ack_irq(ctx, 0, errstat);
-}
-
-irqreturn_t cxl_slice_irq_err(int irq, void *data)
-{
-       struct cxl_afu *afu = data;
-       u64 fir_slice, errstat, serr, afu_debug;
-
-       WARN(irq, "CXL SLICE ERROR interrupt %i\n", irq);
-
-       serr = cxl_p1n_read(afu, CXL_PSL_SERR_An);
-       fir_slice = cxl_p1n_read(afu, CXL_PSL_FIR_SLICE_An);
-       errstat = cxl_p2n_read(afu, CXL_PSL_ErrStat_An);
-       afu_debug = cxl_p1n_read(afu, CXL_AFU_DEBUG_An);
-       dev_crit(&afu->dev, "PSL_SERR_An: 0x%016llx\n", serr);
-       dev_crit(&afu->dev, "PSL_FIR_SLICE_An: 0x%016llx\n", fir_slice);
-       dev_crit(&afu->dev, "CXL_PSL_ErrStat_An: 0x%016llx\n", errstat);
-       dev_crit(&afu->dev, "CXL_PSL_AFU_DEBUG_An: 0x%016llx\n", afu_debug);
-
-       cxl_p1n_write(afu, CXL_PSL_SERR_An, serr);
-
-       return IRQ_HANDLED;
-}
-
-static irqreturn_t cxl_irq_err(int irq, void *data)
-{
-       struct cxl *adapter = data;
-       u64 fir1, fir2, err_ivte;
-
-       WARN(1, "CXL ERROR interrupt %i\n", irq);
-
-       err_ivte = cxl_p1_read(adapter, CXL_PSL_ErrIVTE);
-       dev_crit(&adapter->dev, "PSL_ErrIVTE: 0x%016llx\n", err_ivte);
-
-       dev_crit(&adapter->dev, "STOPPING CXL TRACE\n");
-       cxl_stop_trace(adapter);
-
-       fir1 = cxl_p1_read(adapter, CXL_PSL_FIR1);
-       fir2 = cxl_p1_read(adapter, CXL_PSL_FIR2);
-
-       dev_crit(&adapter->dev, "PSL_FIR1: 0x%016llx\nPSL_FIR2: 0x%016llx\n", fir1, fir2);
-
-       return IRQ_HANDLED;
-}
-
 static irqreturn_t schedule_cxl_fault(struct cxl_context *ctx, u64 dsisr, u64 dar)
 {
        ctx->dsisr = dsisr;
@@ -179,45 +113,6 @@ irqreturn_t cxl_irq(int irq, void *data, struct cxl_irq_info *irq_info)
        return IRQ_HANDLED;
 }
 
-static irqreturn_t fail_psl_irq(struct cxl_afu *afu, struct cxl_irq_info *irq_info)
-{
-       if (irq_info->dsisr & CXL_PSL_DSISR_TRANS)
-               cxl_p2n_write(afu, CXL_PSL_TFC_An, CXL_PSL_TFC_An_AE);
-       else
-               cxl_p2n_write(afu, CXL_PSL_TFC_An, CXL_PSL_TFC_An_A);
-
-       return IRQ_HANDLED;
-}
-
-static irqreturn_t cxl_irq_multiplexed(int irq, void *data)
-{
-       struct cxl_afu *afu = data;
-       struct cxl_context *ctx;
-       struct cxl_irq_info irq_info;
-       int ph = cxl_p2n_read(afu, CXL_PSL_PEHandle_An) & 0xffff;
-       int ret;
-
-       if ((ret = cxl_get_irq(afu, &irq_info))) {
-               WARN(1, "Unable to get CXL IRQ Info: %i\n", ret);
-               return fail_psl_irq(afu, &irq_info);
-       }
-
-       rcu_read_lock();
-       ctx = idr_find(&afu->contexts_idr, ph);
-       if (ctx) {
-               ret = cxl_irq(irq, ctx, &irq_info);
-               rcu_read_unlock();
-               return ret;
-       }
-       rcu_read_unlock();
-
-       WARN(1, "Unable to demultiplex CXL PSL IRQ for PE %i DSISR %016llx DAR"
-               " %016llx\n(Possible AFU HW issue - was a term/remove acked"
-               " with outstanding transactions?)\n", ph, irq_info.dsisr,
-               irq_info.dar);
-       return fail_psl_irq(afu, &irq_info);
-}
-
 static irqreturn_t cxl_irq_afu(int irq, void *data)
 {
        struct cxl_context *ctx = data;
@@ -316,104 +211,6 @@ err:
        return -ENOMEM;
 }
 
-int cxl_register_psl_err_irq(struct cxl *adapter)
-{
-       int rc;
-
-       adapter->irq_name = kasprintf(GFP_KERNEL, "cxl-%s-err",
-                                     dev_name(&adapter->dev));
-       if (!adapter->irq_name)
-               return -ENOMEM;
-
-       if ((rc = cxl_register_one_irq(adapter, cxl_irq_err, adapter,
-                                      &adapter->err_hwirq,
-                                      &adapter->err_virq,
-                                      adapter->irq_name))) {
-               kfree(adapter->irq_name);
-               adapter->irq_name = NULL;
-               return rc;
-       }
-
-       cxl_p1_write(adapter, CXL_PSL_ErrIVTE, adapter->err_hwirq & 0xffff);
-
-       return 0;
-}
-
-void cxl_release_psl_err_irq(struct cxl *adapter)
-{
-       if (adapter->err_virq != irq_find_mapping(NULL, adapter->err_hwirq))
-               return;
-
-       cxl_p1_write(adapter, CXL_PSL_ErrIVTE, 0x0000000000000000);
-       cxl_unmap_irq(adapter->err_virq, adapter);
-       cxl_release_one_irq(adapter, adapter->err_hwirq);
-       kfree(adapter->irq_name);
-}
-
-int cxl_register_serr_irq(struct cxl_afu *afu)
-{
-       u64 serr;
-       int rc;
-
-       afu->err_irq_name = kasprintf(GFP_KERNEL, "cxl-%s-err",
-                                     dev_name(&afu->dev));
-       if (!afu->err_irq_name)
-               return -ENOMEM;
-
-       if ((rc = cxl_register_one_irq(afu->adapter, cxl_slice_irq_err, afu,
-                                      &afu->serr_hwirq,
-                                      &afu->serr_virq, afu->err_irq_name))) {
-               kfree(afu->err_irq_name);
-               afu->err_irq_name = NULL;
-               return rc;
-       }
-
-       serr = cxl_p1n_read(afu, CXL_PSL_SERR_An);
-       serr = (serr & 0x00ffffffffff0000ULL) | (afu->serr_hwirq & 0xffff);
-       cxl_p1n_write(afu, CXL_PSL_SERR_An, serr);
-
-       return 0;
-}
-
-void cxl_release_serr_irq(struct cxl_afu *afu)
-{
-       if (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_release_one_irq(afu->adapter, afu->serr_hwirq);
-       kfree(afu->err_irq_name);
-}
-
-int cxl_register_psl_irq(struct cxl_afu *afu)
-{
-       int rc;
-
-       afu->psl_irq_name = kasprintf(GFP_KERNEL, "cxl-%s",
-                                     dev_name(&afu->dev));
-       if (!afu->psl_irq_name)
-               return -ENOMEM;
-
-       if ((rc = cxl_register_one_irq(afu->adapter, cxl_irq_multiplexed, afu,
-                                   &afu->psl_hwirq, &afu->psl_virq,
-                                   afu->psl_irq_name))) {
-               kfree(afu->psl_irq_name);
-               afu->psl_irq_name = NULL;
-       }
-       return rc;
-}
-
-void cxl_release_psl_irq(struct cxl_afu *afu)
-{
-       if (afu->psl_virq != irq_find_mapping(NULL, afu->psl_hwirq))
-               return;
-
-       cxl_unmap_irq(afu->psl_virq, afu);
-       cxl_release_one_irq(afu->adapter, afu->psl_hwirq);
-       kfree(afu->psl_irq_name);
-}
-
 void afu_irq_name_free(struct cxl_context *ctx)
 {
        struct cxl_irq_name *irq_name, *tmp;
@@ -504,7 +301,7 @@ int afu_register_irqs(struct cxl_context *ctx, u32 count)
 
        afu_register_hwirqs(ctx);
        return 0;
- }
+}
 
 void afu_release_irqs(struct cxl_context *ctx, void *cookie)
 {
index 7ef5b43..90933eb 100644 (file)
@@ -173,7 +173,7 @@ struct cxl *get_cxl_adapter(int num)
        return adapter;
 }
 
-int cxl_alloc_adapter_nr(struct cxl *adapter)
+static int cxl_alloc_adapter_nr(struct cxl *adapter)
 {
        int i;
 
index 0b0a4c8..3103e33 100644 (file)
@@ -712,7 +712,7 @@ int cxl_detach_process(struct cxl_context *ctx)
        return detach_process_native_afu_directed(ctx);
 }
 
-int cxl_get_irq(struct cxl_afu *afu, struct cxl_irq_info *info)
+static int cxl_get_irq(struct cxl_afu *afu, struct cxl_irq_info *info)
 {
        u64 pidtid;
 
@@ -734,6 +734,208 @@ int cxl_get_irq(struct cxl_afu *afu, struct cxl_irq_info *info)
        return 0;
 }
 
+irqreturn_t handle_psl_slice_error(struct cxl_context *ctx, u64 dsisr, u64 errstat)
+{
+       u64 fir1, fir2, fir_slice, serr, afu_debug;
+
+       fir1 = cxl_p1_read(ctx->afu->adapter, CXL_PSL_FIR1);
+       fir2 = cxl_p1_read(ctx->afu->adapter, CXL_PSL_FIR2);
+       fir_slice = cxl_p1n_read(ctx->afu, CXL_PSL_FIR_SLICE_An);
+       serr = cxl_p1n_read(ctx->afu, CXL_PSL_SERR_An);
+       afu_debug = cxl_p1n_read(ctx->afu, CXL_AFU_DEBUG_An);
+
+       dev_crit(&ctx->afu->dev, "PSL ERROR STATUS: 0x%016llx\n", errstat);
+       dev_crit(&ctx->afu->dev, "PSL_FIR1: 0x%016llx\n", fir1);
+       dev_crit(&ctx->afu->dev, "PSL_FIR2: 0x%016llx\n", fir2);
+       dev_crit(&ctx->afu->dev, "PSL_SERR_An: 0x%016llx\n", serr);
+       dev_crit(&ctx->afu->dev, "PSL_FIR_SLICE_An: 0x%016llx\n", fir_slice);
+       dev_crit(&ctx->afu->dev, "CXL_PSL_AFU_DEBUG_An: 0x%016llx\n", afu_debug);
+
+       dev_crit(&ctx->afu->dev, "STOPPING CXL TRACE\n");
+       cxl_stop_trace(ctx->afu->adapter);
+
+       return cxl_ack_irq(ctx, 0, errstat);
+}
+
+static irqreturn_t fail_psl_irq(struct cxl_afu *afu, struct cxl_irq_info *irq_info)
+{
+       if (irq_info->dsisr & CXL_PSL_DSISR_TRANS)
+               cxl_p2n_write(afu, CXL_PSL_TFC_An, CXL_PSL_TFC_An_AE);
+       else
+               cxl_p2n_write(afu, CXL_PSL_TFC_An, CXL_PSL_TFC_An_A);
+
+       return IRQ_HANDLED;
+}
+
+static irqreturn_t cxl_irq_multiplexed(int irq, void *data)
+{
+       struct cxl_afu *afu = data;
+       struct cxl_context *ctx;
+       struct cxl_irq_info irq_info;
+       int ph = cxl_p2n_read(afu, CXL_PSL_PEHandle_An) & 0xffff;
+       int ret;
+
+       if ((ret = cxl_get_irq(afu, &irq_info))) {
+               WARN(1, "Unable to get CXL IRQ Info: %i\n", ret);
+               return fail_psl_irq(afu, &irq_info);
+       }
+
+       rcu_read_lock();
+       ctx = idr_find(&afu->contexts_idr, ph);
+       if (ctx) {
+               ret = cxl_irq(irq, ctx, &irq_info);
+               rcu_read_unlock();
+               return ret;
+       }
+       rcu_read_unlock();
+
+       WARN(1, "Unable to demultiplex CXL PSL IRQ for PE %i DSISR %016llx DAR"
+               " %016llx\n(Possible AFU HW issue - was a term/remove acked"
+               " with outstanding transactions?)\n", ph, irq_info.dsisr,
+               irq_info.dar);
+       return fail_psl_irq(afu, &irq_info);
+}
+
+static irqreturn_t cxl_slice_irq_err(int irq, void *data)
+{
+       struct cxl_afu *afu = data;
+       u64 fir_slice, errstat, serr, afu_debug;
+
+       WARN(irq, "CXL SLICE ERROR interrupt %i\n", irq);
+
+       serr = cxl_p1n_read(afu, CXL_PSL_SERR_An);
+       fir_slice = cxl_p1n_read(afu, CXL_PSL_FIR_SLICE_An);
+       errstat = cxl_p2n_read(afu, CXL_PSL_ErrStat_An);
+       afu_debug = cxl_p1n_read(afu, CXL_AFU_DEBUG_An);
+       dev_crit(&afu->dev, "PSL_SERR_An: 0x%016llx\n", serr);
+       dev_crit(&afu->dev, "PSL_FIR_SLICE_An: 0x%016llx\n", fir_slice);
+       dev_crit(&afu->dev, "CXL_PSL_ErrStat_An: 0x%016llx\n", errstat);
+       dev_crit(&afu->dev, "CXL_PSL_AFU_DEBUG_An: 0x%016llx\n", afu_debug);
+
+       cxl_p1n_write(afu, CXL_PSL_SERR_An, serr);
+
+       return IRQ_HANDLED;
+}
+
+static irqreturn_t cxl_irq_err(int irq, void *data)
+{
+       struct cxl *adapter = data;
+       u64 fir1, fir2, err_ivte;
+
+       WARN(1, "CXL ERROR interrupt %i\n", irq);
+
+       err_ivte = cxl_p1_read(adapter, CXL_PSL_ErrIVTE);
+       dev_crit(&adapter->dev, "PSL_ErrIVTE: 0x%016llx\n", err_ivte);
+
+       dev_crit(&adapter->dev, "STOPPING CXL TRACE\n");
+       cxl_stop_trace(adapter);
+
+       fir1 = cxl_p1_read(adapter, CXL_PSL_FIR1);
+       fir2 = cxl_p1_read(adapter, CXL_PSL_FIR2);
+
+       dev_crit(&adapter->dev, "PSL_FIR1: 0x%016llx\nPSL_FIR2: 0x%016llx\n", fir1, fir2);
+
+       return IRQ_HANDLED;
+}
+
+int cxl_register_psl_err_irq(struct cxl *adapter)
+{
+       int rc;
+
+       adapter->irq_name = kasprintf(GFP_KERNEL, "cxl-%s-err",
+                                     dev_name(&adapter->dev));
+       if (!adapter->irq_name)
+               return -ENOMEM;
+
+       if ((rc = cxl_register_one_irq(adapter, cxl_irq_err, adapter,
+                                      &adapter->err_hwirq,
+                                      &adapter->err_virq,
+                                      adapter->irq_name))) {
+               kfree(adapter->irq_name);
+               adapter->irq_name = NULL;
+               return rc;
+       }
+
+       cxl_p1_write(adapter, CXL_PSL_ErrIVTE, adapter->err_hwirq & 0xffff);
+
+       return 0;
+}
+
+void cxl_release_psl_err_irq(struct cxl *adapter)
+{
+       if (adapter->err_virq != irq_find_mapping(NULL, adapter->err_hwirq))
+               return;
+
+       cxl_p1_write(adapter, CXL_PSL_ErrIVTE, 0x0000000000000000);
+       cxl_unmap_irq(adapter->err_virq, adapter);
+       cxl_release_one_irq(adapter, adapter->err_hwirq);
+       kfree(adapter->irq_name);
+}
+
+int cxl_register_serr_irq(struct cxl_afu *afu)
+{
+       u64 serr;
+       int rc;
+
+       afu->err_irq_name = kasprintf(GFP_KERNEL, "cxl-%s-err",
+                                     dev_name(&afu->dev));
+       if (!afu->err_irq_name)
+               return -ENOMEM;
+
+       if ((rc = cxl_register_one_irq(afu->adapter, cxl_slice_irq_err, afu,
+                                      &afu->serr_hwirq,
+                                      &afu->serr_virq, afu->err_irq_name))) {
+               kfree(afu->err_irq_name);
+               afu->err_irq_name = NULL;
+               return rc;
+       }
+
+       serr = cxl_p1n_read(afu, CXL_PSL_SERR_An);
+       serr = (serr & 0x00ffffffffff0000ULL) | (afu->serr_hwirq & 0xffff);
+       cxl_p1n_write(afu, CXL_PSL_SERR_An, serr);
+
+       return 0;
+}
+
+void cxl_release_serr_irq(struct cxl_afu *afu)
+{
+       if (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_release_one_irq(afu->adapter, afu->serr_hwirq);
+       kfree(afu->err_irq_name);
+}
+
+int cxl_register_psl_irq(struct cxl_afu *afu)
+{
+       int rc;
+
+       afu->psl_irq_name = kasprintf(GFP_KERNEL, "cxl-%s",
+                                     dev_name(&afu->dev));
+       if (!afu->psl_irq_name)
+               return -ENOMEM;
+
+       if ((rc = cxl_register_one_irq(afu->adapter, cxl_irq_multiplexed, afu,
+                                   &afu->psl_hwirq, &afu->psl_virq,
+                                   afu->psl_irq_name))) {
+               kfree(afu->psl_irq_name);
+               afu->psl_irq_name = NULL;
+       }
+       return rc;
+}
+
+void cxl_release_psl_irq(struct cxl_afu *afu)
+{
+       if (afu->psl_virq != irq_find_mapping(NULL, afu->psl_hwirq))
+               return;
+
+       cxl_unmap_irq(afu->psl_virq, afu);
+       cxl_release_one_irq(afu->adapter, afu->psl_hwirq);
+       kfree(afu->psl_irq_name);
+}
+
 static void recover_psl_err(struct cxl_afu *afu, u64 errstat)
 {
        u64 dsisr;
@@ -763,3 +965,39 @@ int cxl_check_error(struct cxl_afu *afu)
 {
        return (cxl_p1n_read(afu, CXL_PSL_SCNTL_An) == ~0ULL);
 }
+
+u64 cxl_afu_cr_read64(struct cxl_afu *afu, int cr, u64 off)
+{
+       if (likely(cxl_adapter_link_ok(afu->adapter)))
+               return in_le64((afu)->afu_desc_mmio + (afu)->crs_offset +
+                              ((cr) * (afu)->crs_len) + (off));
+       else
+               return ~0ULL;
+}
+
+u32 cxl_afu_cr_read32(struct cxl_afu *afu, int cr, u64 off)
+{
+       if (likely(cxl_adapter_link_ok(afu->adapter)))
+               return in_le32((afu)->afu_desc_mmio + (afu)->crs_offset +
+                              ((cr) * (afu)->crs_len) + (off));
+       else
+               return 0xffffffff;
+}
+
+u16 cxl_afu_cr_read16(struct cxl_afu *afu, int cr, u64 off)
+{
+       u64 aligned_off = off & ~0x3L;
+       u32 val;
+
+       val = cxl_afu_cr_read32(afu, cr, aligned_off);
+       return (val >> ((off & 0x2) * 8)) & 0xffff;
+}
+
+u8 cxl_afu_cr_read8(struct cxl_afu *afu, int cr, u64 off)
+{
+       u64 aligned_off = off & ~0x3L;
+       u32 val;
+
+       val = cxl_afu_cr_read32(afu, cr, aligned_off);
+       return (val >> ((off & 0x3) * 8)) & 0xff;
+}
index ad28c56..c6279e5 100644 (file)
 #define   AFUD_EB_LEN(val)             EXTRACT_PPC_BITS(val, 8, 63)
 #define AFUD_READ_EB_OFF(afu)          AFUD_READ(afu, 0x48)
 
-u16 cxl_afu_cr_read16(struct cxl_afu *afu, int cr, u64 off)
-{
-       u64 aligned_off = off & ~0x3L;
-       u32 val;
-
-       val = cxl_afu_cr_read32(afu, cr, aligned_off);
-       return (val >> ((off & 0x2) * 8)) & 0xffff;
-}
-
-u8 cxl_afu_cr_read8(struct cxl_afu *afu, int cr, u64 off)
-{
-       u64 aligned_off = off & ~0x3L;
-       u32 val;
-
-       val = cxl_afu_cr_read32(afu, cr, aligned_off);
-       return (val >> ((off & 0x3) * 8)) & 0xff;
-}
-
 static const struct pci_device_id cxl_pci_tbl[] = {
        { PCI_DEVICE(PCI_VENDOR_ID_IBM, 0x0477), },
        { PCI_DEVICE(PCI_VENDOR_ID_IBM, 0x044b), },