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authorFrederic Barrat <fbarrat@linux.vnet.ibm.com>2018-01-23 12:31:43 +0100
committerMichael Ellerman <mpe@ellerman.id.au>2018-01-24 11:42:59 +1100
commit280b983ce2b8759722d911ea4b5af66e95d84e09 (patch)
treed3f3ffe5ee5acd780749b690921e97c09aa76845 /drivers/misc
parentaeddad1760aeb206d912b27b230269407efd5b06 (diff)
ocxl: Add a kernel API for other opencapi drivers
Some of the functions done by the generic driver should also be needed by other opencapi drivers: attaching a context to an adapter, translation fault handling, AFU interrupt allocation... So to avoid code duplication, the driver provides a kernel API that other drivers can use, similar to calling a in-kernel library. It is still a bit theoretical, for lack of real hardware, and will likely need adjustements down the road. But we used the cxlflash driver as a guinea pig. Signed-off-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'drivers/misc')
-rw-r--r--drivers/misc/ocxl/config.c13
-rw-r--r--drivers/misc/ocxl/link.c7
-rw-r--r--drivers/misc/ocxl/ocxl_internal.h71
3 files changed, 20 insertions, 71 deletions
diff --git a/drivers/misc/ocxl/config.c b/drivers/misc/ocxl/config.c
index ea8cca50ea06..2e30de9c694a 100644
--- a/drivers/misc/ocxl/config.c
+++ b/drivers/misc/ocxl/config.c
@@ -2,8 +2,8 @@
// Copyright 2017 IBM Corp.
#include <linux/pci.h>
#include <asm/pnv-ocxl.h>
+#include <misc/ocxl.h>
#include <misc/ocxl-config.h>
-#include "ocxl_internal.h"
#define EXTRACT_BIT(val, bit) (!!(val & BIT(bit)))
#define EXTRACT_BITS(val, s, e) ((val & GENMASK(e, s)) >> s)
@@ -243,6 +243,7 @@ int ocxl_config_read_function(struct pci_dev *dev, struct ocxl_fn_config *fn)
rc = validate_function(dev, fn);
return rc;
}
+EXPORT_SYMBOL_GPL(ocxl_config_read_function);
static int read_afu_info(struct pci_dev *dev, struct ocxl_fn_config *fn,
int offset, u32 *data)
@@ -301,6 +302,7 @@ int ocxl_config_check_afu_index(struct pci_dev *dev,
}
return 1;
}
+EXPORT_SYMBOL_GPL(ocxl_config_check_afu_index);
static int read_afu_name(struct pci_dev *dev, struct ocxl_fn_config *fn,
struct ocxl_afu_config *afu)
@@ -498,6 +500,7 @@ int ocxl_config_read_afu(struct pci_dev *dev, struct ocxl_fn_config *fn,
rc = validate_afu(dev, afu);
return rc;
}
+EXPORT_SYMBOL_GPL(ocxl_config_read_afu);
int ocxl_config_get_actag_info(struct pci_dev *dev, u16 *base, u16 *enabled,
u16 *supported)
@@ -516,6 +519,7 @@ int ocxl_config_get_actag_info(struct pci_dev *dev, u16 *base, u16 *enabled,
}
return 0;
}
+EXPORT_SYMBOL_GPL(ocxl_config_get_actag_info);
void ocxl_config_set_afu_actag(struct pci_dev *dev, int pos, int actag_base,
int actag_count)
@@ -528,11 +532,13 @@ void ocxl_config_set_afu_actag(struct pci_dev *dev, int pos, int actag_base,
val = actag_base & OCXL_DVSEC_ACTAG_MASK;
pci_write_config_dword(dev, pos + OCXL_DVSEC_AFU_CTRL_ACTAG_BASE, val);
}
+EXPORT_SYMBOL_GPL(ocxl_config_set_afu_actag);
int ocxl_config_get_pasid_info(struct pci_dev *dev, int *count)
{
return pnv_ocxl_get_pasid_count(dev, count);
}
+EXPORT_SYMBOL_GPL(ocxl_config_get_pasid_info);
void ocxl_config_set_afu_pasid(struct pci_dev *dev, int pos, int pasid_base,
u32 pasid_count_log)
@@ -550,6 +556,7 @@ void ocxl_config_set_afu_pasid(struct pci_dev *dev, int pos, int pasid_base,
pci_write_config_dword(dev, pos + OCXL_DVSEC_AFU_CTRL_PASID_BASE,
val32);
}
+EXPORT_SYMBOL_GPL(ocxl_config_set_afu_pasid);
void ocxl_config_set_afu_state(struct pci_dev *dev, int pos, int enable)
{
@@ -562,6 +569,7 @@ void ocxl_config_set_afu_state(struct pci_dev *dev, int pos, int enable)
val &= 0xFE;
pci_write_config_byte(dev, pos + OCXL_DVSEC_AFU_CTRL_ENABLE, val);
}
+EXPORT_SYMBOL_GPL(ocxl_config_set_afu_state);
int ocxl_config_set_TL(struct pci_dev *dev, int tl_dvsec)
{
@@ -660,6 +668,7 @@ out:
kfree(recv_rate);
return rc;
}
+EXPORT_SYMBOL_GPL(ocxl_config_set_TL);
int ocxl_config_terminate_pasid(struct pci_dev *dev, int afu_control, int pasid)
{
@@ -699,6 +708,7 @@ int ocxl_config_terminate_pasid(struct pci_dev *dev, int afu_control, int pasid)
}
return 0;
}
+EXPORT_SYMBOL_GPL(ocxl_config_terminate_pasid);
void ocxl_config_set_actag(struct pci_dev *dev, int func_dvsec, u32 tag_first,
u32 tag_count)
@@ -710,3 +720,4 @@ void ocxl_config_set_actag(struct pci_dev *dev, int func_dvsec, u32 tag_first,
pci_write_config_dword(dev, func_dvsec + OCXL_DVSEC_FUNC_OFF_ACTAG,
val);
}
+EXPORT_SYMBOL_GPL(ocxl_config_set_actag);
diff --git a/drivers/misc/ocxl/link.c b/drivers/misc/ocxl/link.c
index 8bdcef9c3cba..fbca3feec592 100644
--- a/drivers/misc/ocxl/link.c
+++ b/drivers/misc/ocxl/link.c
@@ -5,6 +5,7 @@
#include <linux/mmu_context.h>
#include <asm/copro.h>
#include <asm/pnv-ocxl.h>
+#include <misc/ocxl.h>
#include "ocxl_internal.h"
@@ -420,6 +421,7 @@ unlock:
mutex_unlock(&links_list_lock);
return rc;
}
+EXPORT_SYMBOL_GPL(ocxl_link_setup);
static void release_xsl(struct kref *ref)
{
@@ -439,6 +441,7 @@ void ocxl_link_release(struct pci_dev *dev, void *link_handle)
kref_put(&link->ref, release_xsl);
mutex_unlock(&links_list_lock);
}
+EXPORT_SYMBOL_GPL(ocxl_link_release);
static u64 calculate_cfg_state(bool kernel)
{
@@ -533,6 +536,7 @@ unlock:
mutex_unlock(&spa->spa_lock);
return rc;
}
+EXPORT_SYMBOL_GPL(ocxl_link_add_pe);
int ocxl_link_remove_pe(void *link_handle, int pasid)
{
@@ -601,6 +605,7 @@ unlock:
mutex_unlock(&spa->spa_lock);
return rc;
}
+EXPORT_SYMBOL_GPL(ocxl_link_remove_pe);
int ocxl_link_irq_alloc(void *link_handle, int *hw_irq, u64 *trigger_addr)
{
@@ -621,6 +626,7 @@ int ocxl_link_irq_alloc(void *link_handle, int *hw_irq, u64 *trigger_addr)
*trigger_addr = addr;
return 0;
}
+EXPORT_SYMBOL_GPL(ocxl_link_irq_alloc);
void ocxl_link_free_irq(void *link_handle, int hw_irq)
{
@@ -629,3 +635,4 @@ void ocxl_link_free_irq(void *link_handle, int hw_irq)
pnv_ocxl_free_xive_irq(hw_irq);
atomic_inc(&link->irq_available);
}
+EXPORT_SYMBOL_GPL(ocxl_link_free_irq);
diff --git a/drivers/misc/ocxl/ocxl_internal.h b/drivers/misc/ocxl/ocxl_internal.h
index a89b88ac67eb..5d421824afd9 100644
--- a/drivers/misc/ocxl/ocxl_internal.h
+++ b/drivers/misc/ocxl/ocxl_internal.h
@@ -6,8 +6,8 @@
#include <linux/pci.h>
#include <linux/cdev.h>
#include <linux/list.h>
+#include <misc/ocxl.h>
-#define OCXL_AFU_NAME_SZ (24+1) /* add 1 for NULL termination */
#define MAX_IRQ_PER_LINK 2000
#define MAX_IRQ_PER_CONTEXT MAX_IRQ_PER_LINK
@@ -16,38 +16,6 @@
extern struct pci_driver ocxl_pci_driver;
-/*
- * The following 2 structures are a fairly generic way of representing
- * the configuration data for a function and AFU, as read from the
- * configuration space.
- */
-struct ocxl_afu_config {
- u8 idx;
- int dvsec_afu_control_pos;
- char name[OCXL_AFU_NAME_SZ];
- u8 version_major;
- u8 version_minor;
- u8 afuc_type;
- u8 afum_type;
- u8 profile;
- u8 global_mmio_bar;
- u64 global_mmio_offset;
- u32 global_mmio_size;
- u8 pp_mmio_bar;
- u64 pp_mmio_offset;
- u32 pp_mmio_stride;
- u8 log_mem_size;
- u8 pasid_supported_log;
- u16 actag_supported;
-};
-
-struct ocxl_fn_config {
- int dvsec_tl_pos;
- int dvsec_function_pos;
- int dvsec_afu_info_pos;
- s8 max_pasid_log;
- s8 max_afu_index;
-};
struct ocxl_fn {
struct device dev;
@@ -135,43 +103,6 @@ extern void ocxl_unregister_afu(struct ocxl_afu *afu);
extern int ocxl_file_init(void);
extern void ocxl_file_exit(void);
-extern int ocxl_config_read_function(struct pci_dev *dev,
- struct ocxl_fn_config *fn);
-
-extern int ocxl_config_check_afu_index(struct pci_dev *dev,
- struct ocxl_fn_config *fn, int afu_idx);
-extern int ocxl_config_read_afu(struct pci_dev *dev,
- struct ocxl_fn_config *fn,
- struct ocxl_afu_config *afu,
- u8 afu_idx);
-extern int ocxl_config_get_pasid_info(struct pci_dev *dev, int *count);
-extern void ocxl_config_set_afu_pasid(struct pci_dev *dev,
- int afu_control,
- int pasid_base, u32 pasid_count_log);
-extern int ocxl_config_get_actag_info(struct pci_dev *dev,
- u16 *base, u16 *enabled, u16 *supported);
-extern void ocxl_config_set_actag(struct pci_dev *dev, int func_dvsec,
- u32 tag_first, u32 tag_count);
-extern void ocxl_config_set_afu_actag(struct pci_dev *dev, int afu_control,
- int actag_base, int actag_count);
-extern void ocxl_config_set_afu_state(struct pci_dev *dev, int afu_control,
- int enable);
-extern int ocxl_config_set_TL(struct pci_dev *dev, int tl_dvsec);
-extern int ocxl_config_terminate_pasid(struct pci_dev *dev, int afu_control,
- int pasid);
-
-extern int ocxl_link_setup(struct pci_dev *dev, int PE_mask,
- void **link_handle);
-extern void ocxl_link_release(struct pci_dev *dev, void *link_handle);
-extern int ocxl_link_add_pe(void *link_handle, int pasid, u32 pidr, u32 tidr,
- u64 amr, struct mm_struct *mm,
- void (*xsl_err_cb)(void *data, u64 addr, u64 dsisr),
- void *xsl_err_data);
-extern int ocxl_link_remove_pe(void *link_handle, int pasid);
-extern int ocxl_link_irq_alloc(void *link_handle, int *hw_irq,
- u64 *addr);
-extern void ocxl_link_free_irq(void *link_handle, int hw_irq);
-
extern int ocxl_pasid_afu_alloc(struct ocxl_fn *fn, u32 size);
extern void ocxl_pasid_afu_free(struct ocxl_fn *fn, u32 start, u32 size);
extern int ocxl_actag_afu_alloc(struct ocxl_fn *fn, u32 size);

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