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direct commit: fix KBI for pci_dev

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Move all the new elemenets to the end of the structure for 13. We
allocate this inside the linuxkpi code, so the size isn't enccoded in
client modules. However, the offsets to the different fields are
encoded. Tihs modifies 04456f7118, 40a215e38a, and 3a606aadf2
and will likely create merge conflicts there (and that's a good thing
since the elements need to be moved to the end of the structure when
merging).

Tweak irq_ent to be binary compatible. Since this is inlined into the
clients, all clients have to agree on the irq_ent offsets.

Restore visibility to linux_kmem_cache_free_rcu
linux_kmem_cache_free_rcu was made static in 10235ad056, however
client drivers depended on calling it directly. Make it visible again to
restore the 13.0-Release KBI for linuxkpi.

Bump FreeBSD_version to 1300515 for restoration of 13.0 KBI. Since this
commmit changes the linuxkpi KBI (this time back to 13.0 release to
restore the status quo of), you'll need to recompile everything that
uses it (you needed to earlier as well, but those were silent
recompilation events). The plus side is that our packages (built using
13.0) for drm-kmod 5.4 work again on -stable systems.

Reviewed by:		bz, wulf
Sponsored by:		Netflix
Differential Revision:	https://reviews.freebsd.org/D31363
This commit is contained in:
Warner Losh 2021-09-22 08:47:12 -06:00
parent 5d8f8ab1eb
commit 0437d10e35
5 changed files with 20 additions and 12 deletions
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4
sys/compat/linuxkpi/common/include/linux/interrupt.h
View file

@ -52,9 +52,11 @@ struct irq_ent {
struct resource *res;
void *arg;
irqreturn_t (*handler)(int, void *);
irqreturn_t (*thread_handler)(int, void *);
void *tag;
unsigned int irq;
/* XXX All new entries must be after this in stable/13 */
irqreturn_t (*thread_handler)(int, void *);
};
void linux_irq_handler(void *);

16
sys/compat/linuxkpi/common/include/linux/pci.h
View file

@ -237,7 +237,6 @@ struct pci_dev {
struct list_head links;
struct pci_driver *pdrv;
struct pci_bus *bus;
struct pci_dev *root;
uint16_t device;
uint16_t vendor;
uint16_t subsystem_vendor;
@ -246,16 +245,21 @@ struct pci_dev {
unsigned int devfn;
uint32_t class;
uint8_t revision;
bool managed; /* devres "pcim_*(). */
bool want_iomap_res;
bool msi_enabled;
bool msix_enabled;
phys_addr_t rom;
size_t romlen;
TAILQ_HEAD(, pci_mmio_region) mmio;
/* Add all new items at the end of the list in 13 */
struct pci_dev *root;
phys_addr_t rom;
size_t romlen;
bool managed; /* devres "pcim_*(). */
bool want_iomap_res;
bool msix_enabled;
};
/* XXX add kassert here on the mmio offset */
/* We need some meta-struct to keep track of these for devres. */
struct pci_devres {
bool enable_io;

2
sys/compat/linuxkpi/common/include/linux/slab.h
View file

@ -210,5 +210,7 @@ extern void *lkpi_kmem_cache_zalloc(struct linux_kmem_cache *, gfp_t);
extern void lkpi_kmem_cache_free(struct linux_kmem_cache *, void *);
extern void linux_kmem_cache_destroy(struct linux_kmem_cache *);
void linux_kfree_async(void *);
void linux_kmem_cache_free_rcu_callback(struct rcu_head *head);
void linux_kmem_cache_free_rcu(struct linux_kmem_cache *, void *);
#endif /* _LINUX_SLAB_H_ */

8
sys/compat/linuxkpi/common/src/linux_slab.c
View file

@ -96,7 +96,7 @@ linux_kmem_ctor(void *mem, int size, void *arg, int flags)
return (0);
}
static void
void
linux_kmem_cache_free_rcu_callback(struct rcu_head *head)
{
struct linux_kmem_rcu *rcu =
@ -145,8 +145,8 @@ linux_kmem_cache_create(const char *name, size_t size, size_t align,
return (c);
}
static inline void
lkpi_kmem_cache_free_rcu(struct linux_kmem_cache *c, void *m)
void
linux_kmem_cache_free_rcu(struct linux_kmem_cache *c, void *m)
{
struct linux_kmem_rcu *rcu = LINUX_KMEM_TO_RCU(c, m);
@ -183,7 +183,7 @@ void
lkpi_kmem_cache_free(struct linux_kmem_cache *c, void *m)
{
if (unlikely(c->cache_flags & SLAB_TYPESAFE_BY_RCU))
lkpi_kmem_cache_free_rcu(c, m);
linux_kmem_cache_free_rcu(c, m);
else if (unlikely(curthread->td_critnest != 0))
lkpi_kmem_cache_free_async(c, m);
else

2
sys/sys/param.h
View file

@ -60,7 +60,7 @@
* in the range 5 to 9.
*/
#undef __FreeBSD_version
#define __FreeBSD_version 1300514 /* Master, propagated to newvers */
#define __FreeBSD_version 1300515 /* Master, propagated to newvers */
/*
* __FreeBSD_kernel__ indicates that this system uses the kernel of FreeBSD,