cxl: Move common code away from bare-metal-specific files

Move around some functions which will be accessed from the bare-metal
and guest environments.
Code in native.c and pci.c is meant to be bare-metal specific.
Other files contain code which may be shared with guests.

Co-authored-by: Frederic Barrat <fbarrat@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>

diff --git a/drivers/misc/cxl/cxl.h b/drivers/misc/cxl/cxl.h
index a521bc7..3f88140 100644 (file)
--- a/drivers/misc/cxl/cxl.h
+++ b/drivers/misc/cxl/cxl.h
@@ -526,6 +526,7 @@ void cxl_release_irq_ranges(struct cxl_irq_ranges *irqs, struct cxl *adapter);
 int cxl_setup_irq(struct cxl *adapter, unsigned int hwirq, unsigned int virq);
 int cxl_update_image_control(struct cxl *adapter);
 int cxl_reset(struct cxl *adapter);
+void cxl_release_afu(struct device *dev);
 
 /* common == phyp + powernv */
 struct cxl_process_element_common {
@@ -679,6 +680,9 @@ void cxl_sysfs_afu_remove(struct cxl_afu *afu);
 int cxl_sysfs_afu_m_add(struct cxl_afu *afu);
 void cxl_sysfs_afu_m_remove(struct cxl_afu *afu);
 
+struct cxl *cxl_alloc_adapter(void);
+struct cxl_afu *cxl_alloc_afu(struct cxl *adapter, int slice);
+
 int cxl_afu_activate_mode(struct cxl_afu *afu, int mode);
 int _cxl_afu_deactivate_mode(struct cxl_afu *afu, int mode);
 int cxl_afu_deactivate_mode(struct cxl_afu *afu);
@@ -733,6 +737,11 @@ struct cxl_irq_info {
 };
 
 void cxl_assign_psn_space(struct cxl_context *ctx);
+irqreturn_t cxl_irq(int irq, void *ctx, struct cxl_irq_info *irq_info);
+int cxl_register_one_irq(struct cxl *adapter, irq_handler_t handler,
+                       void *cookie, irq_hw_number_t *dest_hwirq,
+                       unsigned int *dest_virq, const char *name);
+
 int cxl_attach_process(struct cxl_context *ctx, bool kernel, u64 wed,
                            u64 amr);
 int cxl_detach_process(struct cxl_context *ctx);

diff --git a/drivers/misc/cxl/irq.c b/drivers/misc/cxl/irq.c
index 09a4060..e468e6c 100644 (file)
--- a/drivers/misc/cxl/irq.c
+++ b/drivers/misc/cxl/irq.c
@@ -93,7 +93,7 @@ static irqreturn_t schedule_cxl_fault(struct cxl_context *ctx, u64 dsisr, u64 da
        return IRQ_HANDLED;
 }
 
-static irqreturn_t cxl_irq(int irq, void *data, struct cxl_irq_info *irq_info)
+irqreturn_t cxl_irq(int irq, void *data, struct cxl_irq_info *irq_info)
 {
        struct cxl_context *ctx = data;
        u64 dsisr, dar;
@@ -291,12 +291,12 @@ void cxl_unmap_irq(unsigned int virq, void *cookie)
        irq_dispose_mapping(virq);
 }
 
-static int cxl_register_one_irq(struct cxl *adapter,
-                               irq_handler_t handler,
-                               void *cookie,
-                               irq_hw_number_t *dest_hwirq,
-                               unsigned int *dest_virq,
-                               const char *name)
+int cxl_register_one_irq(struct cxl *adapter,
+                       irq_handler_t handler,
+                       void *cookie,
+                       irq_hw_number_t *dest_hwirq,
+                       unsigned int *dest_virq,
+                       const char *name)
 {
        int hwirq, virq;
 

diff --git a/drivers/misc/cxl/main.c b/drivers/misc/cxl/main.c
index 9fde75e..7ef5b43 100644 (file)
--- a/drivers/misc/cxl/main.c
+++ b/drivers/misc/cxl/main.c
@@ -32,6 +32,27 @@ uint cxl_verbose;
 module_param_named(verbose, cxl_verbose, uint, 0600);
 MODULE_PARM_DESC(verbose, "Enable verbose dmesg output");
 
+int cxl_afu_slbia(struct cxl_afu *afu)
+{
+       unsigned long timeout = jiffies + (HZ * CXL_TIMEOUT);
+
+       pr_devel("cxl_afu_slbia issuing SLBIA command\n");
+       cxl_p2n_write(afu, CXL_SLBIA_An, CXL_TLB_SLB_IQ_ALL);
+       while (cxl_p2n_read(afu, CXL_SLBIA_An) & CXL_TLB_SLB_P) {
+               if (time_after_eq(jiffies, timeout)) {
+                       dev_warn(&afu->dev, "WARNING: CXL AFU SLBIA timed out!\n");
+                       return -EBUSY;
+               }
+               /* If the adapter has gone down, we can assume that we
+                * will PERST it and that will invalidate everything.
+                */
+               if (!cxl_adapter_link_ok(afu->adapter))
+                       return -EIO;
+               cpu_relax();
+       }
+       return 0;
+}
+
 static inline void _cxl_slbia(struct cxl_context *ctx, struct mm_struct *mm)
 {
        struct task_struct *task;
@@ -174,6 +195,52 @@ void cxl_remove_adapter_nr(struct cxl *adapter)
        idr_remove(&cxl_adapter_idr, adapter->adapter_num);
 }
 
+struct cxl *cxl_alloc_adapter(void)
+{
+       struct cxl *adapter;
+
+       if (!(adapter = kzalloc(sizeof(struct cxl), GFP_KERNEL)))
+               return NULL;
+
+       spin_lock_init(&adapter->afu_list_lock);
+
+       if (cxl_alloc_adapter_nr(adapter))
+               goto err1;
+
+       if (dev_set_name(&adapter->dev, "card%i", adapter->adapter_num))
+               goto err2;
+
+       return adapter;
+
+err2:
+       cxl_remove_adapter_nr(adapter);
+err1:
+       kfree(adapter);
+       return NULL;
+}
+
+struct cxl_afu *cxl_alloc_afu(struct cxl *adapter, int slice)
+{
+       struct cxl_afu *afu;
+
+       if (!(afu = kzalloc(sizeof(struct cxl_afu), GFP_KERNEL)))
+               return NULL;
+
+       afu->adapter = adapter;
+       afu->dev.parent = &adapter->dev;
+       afu->dev.release = cxl_release_afu;
+       afu->slice = slice;
+       idr_init(&afu->contexts_idr);
+       mutex_init(&afu->contexts_lock);
+       spin_lock_init(&afu->afu_cntl_lock);
+       mutex_init(&afu->spa_mutex);
+
+       afu->prefault_mode = CXL_PREFAULT_NONE;
+       afu->irqs_max = afu->adapter->user_irqs;
+
+       return afu;
+}
+
 int cxl_afu_select_best_mode(struct cxl_afu *afu)
 {
        if (afu->modes_supported & CXL_MODE_DIRECTED)

diff --git a/drivers/misc/cxl/native.c b/drivers/misc/cxl/native.c
index f409097..0b0a4c8 100644 (file)
--- a/drivers/misc/cxl/native.c
+++ b/drivers/misc/cxl/native.c
@@ -265,27 +265,6 @@ int cxl_tlb_slb_invalidate(struct cxl *adapter)
        return 0;
 }
 
-int cxl_afu_slbia(struct cxl_afu *afu)
-{
-       unsigned long timeout = jiffies + (HZ * CXL_TIMEOUT);
-
-       pr_devel("cxl_afu_slbia issuing SLBIA command\n");
-       cxl_p2n_write(afu, CXL_SLBIA_An, CXL_TLB_SLB_IQ_ALL);
-       while (cxl_p2n_read(afu, CXL_SLBIA_An) & CXL_TLB_SLB_P) {
-               if (time_after_eq(jiffies, timeout)) {
-                       dev_warn(&afu->dev, "WARNING: CXL AFU SLBIA timed out!\n");
-                       return -EBUSY;
-               }
-               /* If the adapter has gone down, we can assume that we
-                * will PERST it and that will invalidate everything.
-                */
-               if (!cxl_adapter_link_ok(afu->adapter))
-                       return -EIO;
-               cpu_relax();
-       }
-       return 0;
-}
-
 static int cxl_write_sstp(struct cxl_afu *afu, u64 sstp0, u64 sstp1)
 {
        int rc;

diff --git a/drivers/misc/cxl/pci.c b/drivers/misc/cxl/pci.c
index 4c1903f..ad28c56 100644 (file)
--- a/drivers/misc/cxl/pci.c
+++ b/drivers/misc/cxl/pci.c
@@ -604,7 +604,7 @@ static void cxl_unmap_slice_regs(struct cxl_afu *afu)
        }
 }
 
-static void cxl_release_afu(struct device *dev)
+void cxl_release_afu(struct device *dev)
 {
        struct cxl_afu *afu = to_cxl_afu(dev);
 
@@ -616,28 +616,6 @@ static void cxl_release_afu(struct device *dev)
        kfree(afu);
 }
 
-static struct cxl_afu *cxl_alloc_afu(struct cxl *adapter, int slice)
-{
-       struct cxl_afu *afu;
-
-       if (!(afu = kzalloc(sizeof(struct cxl_afu), GFP_KERNEL)))
-               return NULL;
-
-       afu->adapter = adapter;
-       afu->dev.parent = &adapter->dev;
-       afu->dev.release = cxl_release_afu;
-       afu->slice = slice;
-       idr_init(&afu->contexts_idr);
-       mutex_init(&afu->contexts_lock);
-       spin_lock_init(&afu->afu_cntl_lock);
-       mutex_init(&afu->spa_mutex);
-
-       afu->prefault_mode = CXL_PREFAULT_NONE;
-       afu->irqs_max = afu->adapter->user_irqs;
-
-       return afu;
-}
-
 /* Expects AFU struct to have recently been zeroed out */
 static int cxl_read_afu_descriptor(struct cxl_afu *afu)
 {
@@ -1105,30 +1083,6 @@ static void cxl_release_adapter(struct device *dev)
        kfree(adapter);
 }
 
-static struct cxl *cxl_alloc_adapter(void)
-{
-       struct cxl *adapter;
-
-       if (!(adapter = kzalloc(sizeof(struct cxl), GFP_KERNEL)))
-               return NULL;
-
-       spin_lock_init(&adapter->afu_list_lock);
-
-       if (cxl_alloc_adapter_nr(adapter))
-               goto err1;
-
-       if (dev_set_name(&adapter->dev, "card%i", adapter->adapter_num))
-               goto err2;
-
-       return adapter;
-
-err2:
-       cxl_remove_adapter_nr(adapter);
-err1:
-       kfree(adapter);
-       return NULL;
-}
-
 #define CXL_PSL_ErrIVTE_tberror (0x1ull << (63-31))
 
 static int sanitise_adapter_regs(struct cxl *adapter)