mirrors/qemu
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
0c7515e1c4
qemu/hw/ppc/e500-ccsr.h

19 lines
320 B
C
Raw Normal View History

Adding BAR0 for e500 PCI controller PCI Root complex have TYPE-1 configuration header while PCI endpoint have type-0 configuration header. The type-1 configuration header have a BAR (BAR0). In Freescale PCI controller BAR0 is used for mapping pci address space to CCSR address space. This can used for 2 purposes: 1) for MSI interrupt generation 2) Allow CCSR registers access when configured as PCI endpoint, which I am not sure is a use case with QEMU-KVM guest. What I observed is that when guest read the size of BAR0 of host controller configuration header (TYPE1 header) then it always reads it as 0. When looking into the QEMU hw/ppce500_pci.c, I do not find the PCI controller device registering BAR0. I do not find any other controller also doing so may they do not use BAR0. There are two issues when BAR0 is not there (which I can think of): 1) There should be BAR0 emulated for PCI Root complex (TYPE1 header) and when reading the size of BAR0, it should give size as per real h/w. 2) Do we need this BAR0 inbound address translation? When BAR0 is of non-zero size then it will be configured for PCI address space to local address(CCSR) space translation on inbound access. The primary use case is for MSI interrupt generation. The device is configured with an address offsets in PCI address space, which will be translated to MSI interrupt generation MPIC registers. Currently I do not understand the MSI interrupt generation mechanism in QEMU and also IIRC we do not use QEMU MSI interrupt mechanism on e500 guest machines. But this BAR0 will be used when using MSI on e500. I can see one more issue, There are ATMUs emulated in hw/ppce500_pci.c, but i do not see these being used for address translation. So far that works because pci address space and local address space are 1:1 mapped. BAR0 inbound translation + ATMU translation will complete the address translation of inbound traffic. Signed-off-by: Bharat Bhushan <bharat.bhushan@freescale.com> [agraf: fix double variable assignment w/o read] Signed-off-by: Alexander Graf <agraf@suse.de>
2012-10-10 08:28:28 +04:00
#ifndef E500_CCSR_H
#define E500_CCSR_H
ppc: do not use ../ in include files This simplifies the scripted execution of the next patch. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2013-02-03 23:18:28 +04:00
#include "hw/sysbus.h"
Move QOM typedefs and add missing includes Some typedefs and macros are defined after the type check macros. This makes it difficult to automatically replace their definitions with OBJECT_DECLARE_TYPE. Patch generated using: $ ./scripts/codeconverter/converter.py -i \ --pattern=QOMStructTypedefSplit $(git grep -l '' -- '*.[ch]') which will split "typdef struct { ... } TypedefName" declarations. Followed by: $ ./scripts/codeconverter/converter.py -i --pattern=MoveSymbols \ $(git grep -l '' -- '*.[ch]') which will: - move the typedefs and #defines above the type check macros - add missing #include "qom/object.h" lines if necessary Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Message-Id: <20200831210740.126168-9-ehabkost@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Message-Id: <20200831210740.126168-10-ehabkost@redhat.com> Message-Id: <20200831210740.126168-11-ehabkost@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2020-09-03 23:43:22 +03:00
#include "qom/object.h"
Adding BAR0 for e500 PCI controller PCI Root complex have TYPE-1 configuration header while PCI endpoint have type-0 configuration header. The type-1 configuration header have a BAR (BAR0). In Freescale PCI controller BAR0 is used for mapping pci address space to CCSR address space. This can used for 2 purposes: 1) for MSI interrupt generation 2) Allow CCSR registers access when configured as PCI endpoint, which I am not sure is a use case with QEMU-KVM guest. What I observed is that when guest read the size of BAR0 of host controller configuration header (TYPE1 header) then it always reads it as 0. When looking into the QEMU hw/ppce500_pci.c, I do not find the PCI controller device registering BAR0. I do not find any other controller also doing so may they do not use BAR0. There are two issues when BAR0 is not there (which I can think of): 1) There should be BAR0 emulated for PCI Root complex (TYPE1 header) and when reading the size of BAR0, it should give size as per real h/w. 2) Do we need this BAR0 inbound address translation? When BAR0 is of non-zero size then it will be configured for PCI address space to local address(CCSR) space translation on inbound access. The primary use case is for MSI interrupt generation. The device is configured with an address offsets in PCI address space, which will be translated to MSI interrupt generation MPIC registers. Currently I do not understand the MSI interrupt generation mechanism in QEMU and also IIRC we do not use QEMU MSI interrupt mechanism on e500 guest machines. But this BAR0 will be used when using MSI on e500. I can see one more issue, There are ATMUs emulated in hw/ppce500_pci.c, but i do not see these being used for address translation. So far that works because pci address space and local address space are 1:1 mapped. BAR0 inbound translation + ATMU translation will complete the address translation of inbound traffic. Signed-off-by: Bharat Bhushan <bharat.bhushan@freescale.com> [agraf: fix double variable assignment w/o read] Signed-off-by: Alexander Graf <agraf@suse.de>
2012-10-10 08:28:28 +04:00
Move QOM typedefs and add missing includes Some typedefs and macros are defined after the type check macros. This makes it difficult to automatically replace their definitions with OBJECT_DECLARE_TYPE. Patch generated using: $ ./scripts/codeconverter/converter.py -i \ --pattern=QOMStructTypedefSplit $(git grep -l '' -- '*.[ch]') which will split "typdef struct { ... } TypedefName" declarations. Followed by: $ ./scripts/codeconverter/converter.py -i --pattern=MoveSymbols \ $(git grep -l '' -- '*.[ch]') which will: - move the typedefs and #defines above the type check macros - add missing #include "qom/object.h" lines if necessary Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Message-Id: <20200831210740.126168-9-ehabkost@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Message-Id: <20200831210740.126168-10-ehabkost@redhat.com> Message-Id: <20200831210740.126168-11-ehabkost@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2020-09-03 23:43:22 +03:00
struct PPCE500CCSRState {
Adding BAR0 for e500 PCI controller PCI Root complex have TYPE-1 configuration header while PCI endpoint have type-0 configuration header. The type-1 configuration header have a BAR (BAR0). In Freescale PCI controller BAR0 is used for mapping pci address space to CCSR address space. This can used for 2 purposes: 1) for MSI interrupt generation 2) Allow CCSR registers access when configured as PCI endpoint, which I am not sure is a use case with QEMU-KVM guest. What I observed is that when guest read the size of BAR0 of host controller configuration header (TYPE1 header) then it always reads it as 0. When looking into the QEMU hw/ppce500_pci.c, I do not find the PCI controller device registering BAR0. I do not find any other controller also doing so may they do not use BAR0. There are two issues when BAR0 is not there (which I can think of): 1) There should be BAR0 emulated for PCI Root complex (TYPE1 header) and when reading the size of BAR0, it should give size as per real h/w. 2) Do we need this BAR0 inbound address translation? When BAR0 is of non-zero size then it will be configured for PCI address space to local address(CCSR) space translation on inbound access. The primary use case is for MSI interrupt generation. The device is configured with an address offsets in PCI address space, which will be translated to MSI interrupt generation MPIC registers. Currently I do not understand the MSI interrupt generation mechanism in QEMU and also IIRC we do not use QEMU MSI interrupt mechanism on e500 guest machines. But this BAR0 will be used when using MSI on e500. I can see one more issue, There are ATMUs emulated in hw/ppce500_pci.c, but i do not see these being used for address translation. So far that works because pci address space and local address space are 1:1 mapped. BAR0 inbound translation + ATMU translation will complete the address translation of inbound traffic. Signed-off-by: Bharat Bhushan <bharat.bhushan@freescale.com> [agraf: fix double variable assignment w/o read] Signed-off-by: Alexander Graf <agraf@suse.de>
2012-10-10 08:28:28 +04:00
/*< private >*/
SysBusDevice parent;
/*< public >*/
MemoryRegion ccsr_space;
Move QOM typedefs and add missing includes Some typedefs and macros are defined after the type check macros. This makes it difficult to automatically replace their definitions with OBJECT_DECLARE_TYPE. Patch generated using: $ ./scripts/codeconverter/converter.py -i \ --pattern=QOMStructTypedefSplit $(git grep -l '' -- '*.[ch]') which will split "typdef struct { ... } TypedefName" declarations. Followed by: $ ./scripts/codeconverter/converter.py -i --pattern=MoveSymbols \ $(git grep -l '' -- '*.[ch]') which will: - move the typedefs and #defines above the type check macros - add missing #include "qom/object.h" lines if necessary Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Message-Id: <20200831210740.126168-9-ehabkost@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Message-Id: <20200831210740.126168-10-ehabkost@redhat.com> Message-Id: <20200831210740.126168-11-ehabkost@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2020-09-03 23:43:22 +03:00
};
Adding BAR0 for e500 PCI controller PCI Root complex have TYPE-1 configuration header while PCI endpoint have type-0 configuration header. The type-1 configuration header have a BAR (BAR0). In Freescale PCI controller BAR0 is used for mapping pci address space to CCSR address space. This can used for 2 purposes: 1) for MSI interrupt generation 2) Allow CCSR registers access when configured as PCI endpoint, which I am not sure is a use case with QEMU-KVM guest. What I observed is that when guest read the size of BAR0 of host controller configuration header (TYPE1 header) then it always reads it as 0. When looking into the QEMU hw/ppce500_pci.c, I do not find the PCI controller device registering BAR0. I do not find any other controller also doing so may they do not use BAR0. There are two issues when BAR0 is not there (which I can think of): 1) There should be BAR0 emulated for PCI Root complex (TYPE1 header) and when reading the size of BAR0, it should give size as per real h/w. 2) Do we need this BAR0 inbound address translation? When BAR0 is of non-zero size then it will be configured for PCI address space to local address(CCSR) space translation on inbound access. The primary use case is for MSI interrupt generation. The device is configured with an address offsets in PCI address space, which will be translated to MSI interrupt generation MPIC registers. Currently I do not understand the MSI interrupt generation mechanism in QEMU and also IIRC we do not use QEMU MSI interrupt mechanism on e500 guest machines. But this BAR0 will be used when using MSI on e500. I can see one more issue, There are ATMUs emulated in hw/ppce500_pci.c, but i do not see these being used for address translation. So far that works because pci address space and local address space are 1:1 mapped. BAR0 inbound translation + ATMU translation will complete the address translation of inbound traffic. Signed-off-by: Bharat Bhushan <bharat.bhushan@freescale.com> [agraf: fix double variable assignment w/o read] Signed-off-by: Alexander Graf <agraf@suse.de>
2012-10-10 08:28:28 +04:00
#define TYPE_CCSR "e500-ccsr"
Use OBJECT_DECLARE_SIMPLE_TYPE when possible This converts existing DECLARE_INSTANCE_CHECKER usage to OBJECT_DECLARE_SIMPLE_TYPE when possible. $ ./scripts/codeconverter/converter.py -i \ --pattern=AddObjectDeclareSimpleType $(git grep -l '' -- '*.[ch]') Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Acked-by: Paul Durrant <paul@xen.org> Message-Id: <20200916182519.415636-6-ehabkost@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2020-09-16 21:25:19 +03:00
OBJECT_DECLARE_SIMPLE_TYPE(PPCE500CCSRState, CCSR)
Adding BAR0 for e500 PCI controller PCI Root complex have TYPE-1 configuration header while PCI endpoint have type-0 configuration header. The type-1 configuration header have a BAR (BAR0). In Freescale PCI controller BAR0 is used for mapping pci address space to CCSR address space. This can used for 2 purposes: 1) for MSI interrupt generation 2) Allow CCSR registers access when configured as PCI endpoint, which I am not sure is a use case with QEMU-KVM guest. What I observed is that when guest read the size of BAR0 of host controller configuration header (TYPE1 header) then it always reads it as 0. When looking into the QEMU hw/ppce500_pci.c, I do not find the PCI controller device registering BAR0. I do not find any other controller also doing so may they do not use BAR0. There are two issues when BAR0 is not there (which I can think of): 1) There should be BAR0 emulated for PCI Root complex (TYPE1 header) and when reading the size of BAR0, it should give size as per real h/w. 2) Do we need this BAR0 inbound address translation? When BAR0 is of non-zero size then it will be configured for PCI address space to local address(CCSR) space translation on inbound access. The primary use case is for MSI interrupt generation. The device is configured with an address offsets in PCI address space, which will be translated to MSI interrupt generation MPIC registers. Currently I do not understand the MSI interrupt generation mechanism in QEMU and also IIRC we do not use QEMU MSI interrupt mechanism on e500 guest machines. But this BAR0 will be used when using MSI on e500. I can see one more issue, There are ATMUs emulated in hw/ppce500_pci.c, but i do not see these being used for address translation. So far that works because pci address space and local address space are 1:1 mapped. BAR0 inbound translation + ATMU translation will complete the address translation of inbound traffic. Signed-off-by: Bharat Bhushan <bharat.bhushan@freescale.com> [agraf: fix double variable assignment w/o read] Signed-off-by: Alexander Graf <agraf@suse.de>
2012-10-10 08:28:28 +04:00
#endif /* E500_CCSR_H */
Reference in New Issue Copy Permalink