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cxl: Introduce implementation-specific API

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The backend API (in cxl.h) lists some low-level functions whose
implementation is different on bare-metal and in a guest. Each
environment implements its own functions, and the common code uses
them through function pointers, defined in cxl_backend_ops

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>
This commit is contained in:
Frederic Barrat
2016-03-04 12:26:28 +01:00
committed by Michael Ellerman
parent cca44c0192
commit 5be587b111
11 changed files with 185 additions and 120 deletions
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16
drivers/misc/cxl/pci.c
View File

@@ -646,7 +646,8 @@ static int cxl_read_afu_descriptor(struct cxl_afu *afu)
static int cxl_afu_descriptor_looks_ok(struct cxl_afu *afu)
{
int i;
int i, rc;
u32 val;
if (afu->psa && afu->adapter->ps_size <
(afu->pp_offset + afu->pp_size*afu->max_procs_virtualised)) {
@@ -658,7 +659,8 @@ static int cxl_afu_descriptor_looks_ok(struct cxl_afu *afu)
dev_warn(&afu->dev, "AFU uses < PAGE_SIZE per-process PSA!");
for (i = 0; i < afu->crs_num; i++) {
if ((cxl_afu_cr_read32(afu, i, 0) == 0)) {
rc = cxl_ops->afu_cr_read32(afu, i, 0, &val);
if (rc || val == 0) {
dev_err(&afu->dev, "ABORTING: AFU configuration record %i is invalid\n", i);
return -EINVAL;
}
@@ -679,7 +681,7 @@ static int sanitise_afu_regs(struct cxl_afu *afu)
reg = cxl_p2n_read(afu, CXL_AFU_Cntl_An);
if ((reg & CXL_AFU_Cntl_An_ES_MASK) != CXL_AFU_Cntl_An_ES_Disabled) {
dev_warn(&afu->dev, "WARNING: AFU was not disabled: %#016llx\n", reg);
if (__cxl_afu_reset(afu))
if (cxl_ops->afu_reset(afu))
return -EIO;
if (cxl_afu_disable(afu))
return -EIO;
@@ -775,7 +777,7 @@ static int cxl_configure_afu(struct cxl_afu *afu, struct cxl *adapter, struct pc
goto err1;
/* We need to reset the AFU before we can read the AFU descriptor */
if ((rc = __cxl_afu_reset(afu)))
if ((rc = cxl_ops->afu_reset(afu)))
goto err1;
if (cxl_verbose)
@@ -876,7 +878,7 @@ static void cxl_remove_afu(struct cxl_afu *afu)
spin_unlock(&afu->adapter->afu_list_lock);
cxl_context_detach_all(afu);
cxl_afu_deactivate_mode(afu);
cxl_ops->afu_deactivate_mode(afu, afu->current_mode);
cxl_deconfigure_afu(afu);
device_unregister(&afu->dev);
@@ -1398,7 +1400,7 @@ static pci_ers_result_t cxl_pci_error_detected(struct pci_dev *pdev,
return result;
cxl_context_detach_all(afu);
cxl_afu_deactivate_mode(afu);
cxl_ops->afu_deactivate_mode(afu, afu->current_mode);
cxl_deconfigure_afu(afu);
}
cxl_deconfigure_adapter(adapter);
@@ -1445,7 +1447,7 @@ static pci_ers_result_t cxl_pci_slot_reset(struct pci_dev *pdev)
afu_dev->dev.archdata.cxl_ctx = ctx;
if (cxl_afu_check_and_enable(afu))
if (cxl_ops->afu_check_and_enable(afu))
goto err;
afu_dev->error_state = pci_channel_io_normal;