[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [PATCH qemu v14 03/18] spapr_pci: Move DMA window enablemen
From: |
Alexey Kardashevskiy |
Subject: |
[Qemu-devel] [PATCH qemu v14 03/18] spapr_pci: Move DMA window enablement to a helper |
Date: |
Mon, 21 Mar 2016 18:46:51 +1100 |
We are going to have multiple DMA windows soon so let's start preparing.
This adds a new helper to create a DMA window and makes use of it in
sPAPRPHBState::realize().
Signed-off-by: Alexey Kardashevskiy <address@hidden>
---
Changes:
v14:
* replaced "int" return to Error* in spapr_phb_dma_window_enable()
---
hw/ppc/spapr_pci.c | 47 ++++++++++++++++++++++++++++++++++-------------
1 file changed, 34 insertions(+), 13 deletions(-)
diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c
index 79baa7b..18332bf 100644
--- a/hw/ppc/spapr_pci.c
+++ b/hw/ppc/spapr_pci.c
@@ -803,6 +803,33 @@ static char *spapr_phb_get_loc_code(sPAPRPHBState *sphb,
PCIDevice *pdev)
return buf;
}
+static void spapr_phb_dma_window_enable(sPAPRPHBState *sphb,
+ uint32_t liobn,
+ uint32_t page_shift,
+ uint64_t window_addr,
+ uint64_t window_size,
+ Error **errp)
+{
+ sPAPRTCETable *tcet;
+ uint32_t nb_table = window_size >> page_shift;
+
+ if (!nb_table) {
+ error_setg(errp, "Zero size table");
+ return;
+ }
+
+ tcet = spapr_tce_new_table(DEVICE(sphb), liobn, window_addr,
+ page_shift, nb_table, false);
+ if (!tcet) {
+ error_setg(errp, "Unable to create TCE table liobn %x for %s",
+ liobn, sphb->dtbusname);
+ return;
+ }
+
+ memory_region_add_subregion(&sphb->iommu_root, tcet->bus_offset,
+ spapr_tce_get_iommu(tcet));
+}
+
/* Macros to operate with address in OF binding to PCI */
#define b_x(x, p, l) (((x) & ((1<<(l))-1)) << (p))
#define b_n(x) b_x((x), 31, 1) /* 0 if relocatable */
@@ -1307,8 +1334,7 @@ static void spapr_phb_realize(DeviceState *dev, Error
**errp)
int i;
PCIBus *bus;
uint64_t msi_window_size = 4096;
- sPAPRTCETable *tcet;
- uint32_t nb_table;
+ Error *local_err = NULL;
if (sphb->index != (uint32_t)-1) {
hwaddr windows_base;
@@ -1460,18 +1486,13 @@ static void spapr_phb_realize(DeviceState *dev, Error
**errp)
}
}
- nb_table = sphb->dma_win_size >> SPAPR_TCE_PAGE_SHIFT;
- tcet = spapr_tce_new_table(DEVICE(sphb), sphb->dma_liobn,
- 0, SPAPR_TCE_PAGE_SHIFT, nb_table, false);
- if (!tcet) {
- error_setg(errp, "Unable to create TCE table for %s",
- sphb->dtbusname);
- return;
- }
-
/* Register default 32bit DMA window */
- memory_region_add_subregion(&sphb->iommu_root, sphb->dma_win_addr,
- spapr_tce_get_iommu(tcet));
+ spapr_phb_dma_window_enable(sphb, sphb->dma_liobn, SPAPR_TCE_PAGE_SHIFT,
+ sphb->dma_win_addr, sphb->dma_win_size,
+ &local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
+ }
sphb->msi = g_hash_table_new_full(g_int_hash, g_int_equal, g_free, g_free);
}
--
2.5.0.rc3
- [Qemu-devel] [PATCH qemu v14 00/18] spapr: vfio: Enable Dynamic DMA windows (DDW), Alexey Kardashevskiy, 2016/03/21
- [Qemu-devel] [PATCH qemu v14 08/18] spapr_iommu: Migrate full state, Alexey Kardashevskiy, 2016/03/21
- [Qemu-devel] [PATCH qemu v14 14/18] spapr_pci: Add and export DMA resetting helper, Alexey Kardashevskiy, 2016/03/21
- [Qemu-devel] [PATCH qemu v14 15/18] vfio: Add host side IOMMU capabilities, Alexey Kardashevskiy, 2016/03/21
- [Qemu-devel] [PATCH qemu v14 17/18] vfio/spapr: Use VFIO_SPAPR_TCE_v2_IOMMU, Alexey Kardashevskiy, 2016/03/21