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s390/pci: stash associated GISA designation
For passthrough devices, we will need to know the GISA designation of the guest if interpretation facilities are to be used. Setup to stash this in the zdev and set a default of 0 (no GISA designation) for now; a subsequent patch will set a valid GISA designation for passthrough devices. Also, extend mpcific routines to specify this stashed designation as part of the mpcific command. Reviewed-by: Pierre Morel <pmorel@linux.ibm.com> Reviewed-by: Niklas Schnelle <schnelle@linux.ibm.com> Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com> Link: https://lore.kernel.org/r/20220606203325.110625-9-mjrosato@linux.ibm.com Signed-off-by: Christian Borntraeger <borntraeger@linux.ibm.com>
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parent
062f002485
commit
c68468ed34
5 changed files with 19 additions and 1 deletions
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@ -123,6 +123,7 @@ struct zpci_dev {
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enum zpci_state state;
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u32 fid; /* function ID, used by sclp */
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u32 fh; /* function handle, used by insn's */
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u32 gisa; /* GISA designation for passthrough */
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u16 vfn; /* virtual function number */
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u16 pchid; /* physical channel ID */
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u8 pfgid; /* function group ID */
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@ -173,7 +173,8 @@ struct clp_req_set_pci {
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u16 reserved2;
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u8 oc; /* operation controls */
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u8 ndas; /* number of dma spaces */
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u64 reserved3;
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u32 reserved3;
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u32 gisa; /* GISA designation */
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} __packed;
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/* Set PCI function response */
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@ -120,6 +120,7 @@ int zpci_register_ioat(struct zpci_dev *zdev, u8 dmaas,
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fib.pba = base;
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fib.pal = limit;
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fib.iota = iota | ZPCI_IOTA_RTTO_FLAG;
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fib.gd = zdev->gisa;
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cc = zpci_mod_fc(req, &fib, &status);
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if (cc)
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zpci_dbg(3, "reg ioat fid:%x, cc:%d, status:%d\n", zdev->fid, cc, status);
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@ -133,6 +134,8 @@ int zpci_unregister_ioat(struct zpci_dev *zdev, u8 dmaas)
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struct zpci_fib fib = {0};
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u8 cc, status;
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fib.gd = zdev->gisa;
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cc = zpci_mod_fc(req, &fib, &status);
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if (cc)
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zpci_dbg(3, "unreg ioat fid:%x, cc:%d, status:%d\n", zdev->fid, cc, status);
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@ -160,6 +163,7 @@ int zpci_fmb_enable_device(struct zpci_dev *zdev)
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atomic64_set(&zdev->unmapped_pages, 0);
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fib.fmb_addr = virt_to_phys(zdev->fmb);
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fib.gd = zdev->gisa;
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cc = zpci_mod_fc(req, &fib, &status);
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if (cc) {
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kmem_cache_free(zdev_fmb_cache, zdev->fmb);
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@ -178,6 +182,8 @@ int zpci_fmb_disable_device(struct zpci_dev *zdev)
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if (!zdev->fmb)
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return -EINVAL;
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fib.gd = zdev->gisa;
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/* Function measurement is disabled if fmb address is zero */
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cc = zpci_mod_fc(req, &fib, &status);
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if (cc == 3) /* Function already gone. */
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@ -229,12 +229,16 @@ static int clp_set_pci_fn(struct zpci_dev *zdev, u32 *fh, u8 nr_dma_as, u8 comma
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{
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struct clp_req_rsp_set_pci *rrb;
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int rc, retries = 100;
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u32 gisa = 0;
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*fh = 0;
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rrb = clp_alloc_block(GFP_KERNEL);
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if (!rrb)
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return -ENOMEM;
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if (command != CLP_SET_DISABLE_PCI_FN)
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gisa = zdev->gisa;
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do {
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memset(rrb, 0, sizeof(*rrb));
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rrb->request.hdr.len = sizeof(rrb->request);
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@ -243,6 +247,7 @@ static int clp_set_pci_fn(struct zpci_dev *zdev, u32 *fh, u8 nr_dma_as, u8 comma
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rrb->request.fh = zdev->fh;
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rrb->request.oc = command;
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rrb->request.ndas = nr_dma_as;
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rrb->request.gisa = gisa;
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rc = clp_req(rrb, CLP_LPS_PCI);
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if (rrb->response.hdr.rsp == CLP_RC_SETPCIFN_BUSY) {
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@ -43,6 +43,7 @@ static int zpci_set_airq(struct zpci_dev *zdev)
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fib.fmt0.aibvo = 0; /* each zdev has its own interrupt vector */
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fib.fmt0.aisb = virt_to_phys(zpci_sbv->vector) + (zdev->aisb / 64) * 8;
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fib.fmt0.aisbo = zdev->aisb & 63;
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fib.gd = zdev->gisa;
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return zpci_mod_fc(req, &fib, &status) ? -EIO : 0;
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}
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@ -54,6 +55,8 @@ static int zpci_clear_airq(struct zpci_dev *zdev)
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struct zpci_fib fib = {0};
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u8 cc, status;
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fib.gd = zdev->gisa;
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cc = zpci_mod_fc(req, &fib, &status);
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if (cc == 3 || (cc == 1 && status == 24))
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/* Function already gone or IRQs already deregistered. */
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@ -72,6 +75,7 @@ static int zpci_set_directed_irq(struct zpci_dev *zdev)
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fib.fmt = 1;
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fib.fmt1.noi = zdev->msi_nr_irqs;
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fib.fmt1.dibvo = zdev->msi_first_bit;
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fib.gd = zdev->gisa;
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return zpci_mod_fc(req, &fib, &status) ? -EIO : 0;
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}
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@ -84,6 +88,7 @@ static int zpci_clear_directed_irq(struct zpci_dev *zdev)
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u8 cc, status;
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fib.fmt = 1;
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fib.gd = zdev->gisa;
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cc = zpci_mod_fc(req, &fib, &status);
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if (cc == 3 || (cc == 1 && status == 24))
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/* Function already gone or IRQs already deregistered. */
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