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| author | Frederic Barrat <fbarrat@linux.vnet.ibm.com> | 2016-03-04 12:26:40 +0100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2016-03-09 23:40:00 +1100 |
| commit | d601ea918b878582e60b773f2f943d8d292b2abf (patch) | |
| tree | d2bba34d1bc92b685d21c668c3abbde2c292a464 /drivers/misc/cxl/cxl.h | |
| parent | b40844aa55bb325de7509003c7529c75b0532412 (diff) | |
| download | linux-0-day-d601ea918b878582e60b773f2f943d8d292b2abf.tar.gz linux-0-day-d601ea918b878582e60b773f2f943d8d292b2abf.tar.xz | |
cxl: Support the cxl kernel API from a guest
Like on bare-metal, the cxl driver creates a virtual PHB and a pci
device for the AFU. The configuration space of the device is mapped to
the configuration record of the AFU.
Reuse the code defined in afu_cr_read8|16|32() when reading the
configuration space of the AFU device.
Even though the (virtual) AFU device is a pci device, the adapter is
not. So a driver using the cxl kernel API cannot read the VPD of the
adapter through the usual PCI interface. Therefore, we add a call to
the cxl kernel API:
ssize_t cxl_read_adapter_vpd(struct pci_dev *dev, void *buf, size_t count);
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>
Diffstat (limited to 'drivers/misc/cxl/cxl.h')
| -rw-r--r-- | drivers/misc/cxl/cxl.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/misc/cxl/cxl.h b/drivers/misc/cxl/cxl.h index 24bd4cab02c2c..b388c971810fa 100644 --- a/drivers/misc/cxl/cxl.h +++ b/drivers/misc/cxl/cxl.h @@ -587,6 +587,7 @@ int cxl_pci_setup_irq(struct cxl *adapter, unsigned int hwirq, unsigned int virq int cxl_update_image_control(struct cxl *adapter); int cxl_pci_reset(struct cxl *adapter); void cxl_pci_release_afu(struct device *dev); +ssize_t cxl_pci_read_adapter_vpd(struct cxl *adapter, void *buf, size_t len); /* common == phyp + powernv */ struct cxl_process_element_common { @@ -808,7 +809,6 @@ int cxl_psl_purge(struct cxl_afu *afu); void cxl_stop_trace(struct cxl *cxl); int cxl_pci_vphb_add(struct cxl_afu *afu); -void cxl_pci_vphb_reconfigure(struct cxl_afu *afu); void cxl_pci_vphb_remove(struct cxl_afu *afu); extern struct pci_driver cxl_pci_driver; @@ -869,6 +869,10 @@ struct cxl_backend_ops { int (*afu_cr_read16)(struct cxl_afu *afu, int cr_idx, u64 offset, u16 *val); int (*afu_cr_read32)(struct cxl_afu *afu, int cr_idx, u64 offset, u32 *val); int (*afu_cr_read64)(struct cxl_afu *afu, int cr_idx, u64 offset, u64 *val); + int (*afu_cr_write8)(struct cxl_afu *afu, int cr_idx, u64 offset, u8 val); + int (*afu_cr_write16)(struct cxl_afu *afu, int cr_idx, u64 offset, u16 val); + int (*afu_cr_write32)(struct cxl_afu *afu, int cr_idx, u64 offset, u32 val); + ssize_t (*read_adapter_vpd)(struct cxl *adapter, void *buf, size_t count); }; extern const struct cxl_backend_ops cxl_native_ops; extern const struct cxl_backend_ops cxl_guest_ops; |