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Tsirkin" , David Hildenbrand , Wei Yang , Jason Wang , Pankaj Gupta Subject: [PATCH v2 21/29] virtio-mem: memory block ids are specific to Sub Block Mode (SBM) Date: Thu, 12 Nov 2020 14:38:07 +0100 Message-Id: <20201112133815.13332-22-david@redhat.com> In-Reply-To: <20201112133815.13332-1-david@redhat.com> References: <20201112133815.13332-1-david@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Let's move first_mb_id/next_mb_id/last_usable_mb_id accordingly. Reviewed-by: Wei Yang Cc: "Michael S. Tsirkin" Cc: Jason Wang Cc: Pankaj Gupta Signed-off-by: David Hildenbrand --- drivers/virtio/virtio_mem.c | 46 ++++++++++++++++++------------------- 1 file changed, 23 insertions(+), 23 deletions(-) diff --git a/drivers/virtio/virtio_mem.c b/drivers/virtio/virtio_mem.c index 6395c3090252..248d28e653a9 100644 --- a/drivers/virtio/virtio_mem.c +++ b/drivers/virtio/virtio_mem.c @@ -96,13 +96,6 @@ struct virtio_mem { /* Maximum region size in bytes. */ uint64_t region_size; =20 - /* Id of the first memory block of this device. */ - unsigned long first_mb_id; - /* Id of the last usable memory block of this device. */ - unsigned long last_usable_mb_id; - /* Id of the next memory bock to prepare when needed. */ - unsigned long next_mb_id; - /* The parent resource for all memory added via this device. */ struct resource *parent_resource; /* @@ -121,6 +114,13 @@ struct virtio_mem { uint64_t offline_threshold; =20 struct { + /* Id of the first memory block of this device. */ + unsigned long first_mb_id; + /* Id of the last usable memory block of this device. */ + unsigned long last_usable_mb_id; + /* Id of the next memory bock to prepare when needed. */ + unsigned long next_mb_id; + /* The subblock size. */ uint64_t sb_size; /* The number of subblocks per Linux memory block. */ @@ -265,7 +265,7 @@ static unsigned long virtio_mem_phys_to_sb_id(struct = virtio_mem *vm, static void virtio_mem_sbm_set_mb_state(struct virtio_mem *vm, unsigned long mb_id, uint8_t state) { - const unsigned long idx =3D mb_id - vm->first_mb_id; + const unsigned long idx =3D mb_id - vm->sbm.first_mb_id; uint8_t old_state; =20 old_state =3D vm->sbm.mb_states[idx]; @@ -282,7 +282,7 @@ static void virtio_mem_sbm_set_mb_state(struct virtio= _mem *vm, static uint8_t virtio_mem_sbm_get_mb_state(struct virtio_mem *vm, unsigned long mb_id) { - const unsigned long idx =3D mb_id - vm->first_mb_id; + const unsigned long idx =3D mb_id - vm->sbm.first_mb_id; =20 return vm->sbm.mb_states[idx]; } @@ -292,8 +292,8 @@ static uint8_t virtio_mem_sbm_get_mb_state(struct vir= tio_mem *vm, */ static int virtio_mem_sbm_mb_states_prepare_next_mb(struct virtio_mem *v= m) { - int old_pages =3D PFN_UP(vm->next_mb_id - vm->first_mb_id); - int new_pages =3D PFN_UP(vm->next_mb_id - vm->first_mb_id + 1); + int old_pages =3D PFN_UP(vm->sbm.next_mb_id - vm->sbm.first_mb_id); + int new_pages =3D PFN_UP(vm->sbm.next_mb_id - vm->sbm.first_mb_id + 1); uint8_t *new_array; =20 if (vm->sbm.mb_states && old_pages =3D=3D new_pages) @@ -314,14 +314,14 @@ static int virtio_mem_sbm_mb_states_prepare_next_mb= (struct virtio_mem *vm) } =20 #define virtio_mem_sbm_for_each_mb(_vm, _mb_id, _state) \ - for (_mb_id =3D _vm->first_mb_id; \ - _mb_id < _vm->next_mb_id && _vm->sbm.mb_count[_state]; \ + for (_mb_id =3D _vm->sbm.first_mb_id; \ + _mb_id < _vm->sbm.next_mb_id && _vm->sbm.mb_count[_state]; \ _mb_id++) \ if (virtio_mem_sbm_get_mb_state(_vm, _mb_id) =3D=3D _state) =20 #define virtio_mem_sbm_for_each_mb_rev(_vm, _mb_id, _state) \ - for (_mb_id =3D _vm->next_mb_id - 1; \ - _mb_id >=3D _vm->first_mb_id && _vm->sbm.mb_count[_state]; \ + for (_mb_id =3D _vm->sbm.next_mb_id - 1; \ + _mb_id >=3D _vm->sbm.first_mb_id && _vm->sbm.mb_count[_state]; \ _mb_id--) \ if (virtio_mem_sbm_get_mb_state(_vm, _mb_id) =3D=3D _state) =20 @@ -332,7 +332,7 @@ static int virtio_mem_sbm_mb_states_prepare_next_mb(s= truct virtio_mem *vm) static int virtio_mem_sbm_sb_state_bit_nr(struct virtio_mem *vm, unsigned long mb_id, int sb_id) { - return (mb_id - vm->first_mb_id) * vm->sbm.sbs_per_mb + sb_id; + return (mb_id - vm->sbm.first_mb_id) * vm->sbm.sbs_per_mb + sb_id; } =20 /* @@ -412,7 +412,7 @@ static int virtio_mem_sbm_first_unplugged_sb(struct v= irtio_mem *vm, */ static int virtio_mem_sbm_sb_states_prepare_next_mb(struct virtio_mem *v= m) { - const unsigned long old_nb_mb =3D vm->next_mb_id - vm->first_mb_id; + const unsigned long old_nb_mb =3D vm->sbm.next_mb_id - vm->sbm.first_mb= _id; const unsigned long old_nb_bits =3D old_nb_mb * vm->sbm.sbs_per_mb; const unsigned long new_nb_bits =3D (old_nb_mb + 1) * vm->sbm.sbs_per_m= b; int old_pages =3D PFN_UP(BITS_TO_LONGS(old_nb_bits) * sizeof(long)); @@ -1194,7 +1194,7 @@ static int virtio_mem_prepare_next_mb(struct virtio= _mem *vm, { int rc; =20 - if (vm->next_mb_id > vm->last_usable_mb_id) + if (vm->sbm.next_mb_id > vm->sbm.last_usable_mb_id) return -ENOSPC; =20 /* Resize the state array if required. */ @@ -1208,7 +1208,7 @@ static int virtio_mem_prepare_next_mb(struct virtio= _mem *vm, return rc; =20 vm->sbm.mb_count[VIRTIO_MEM_SBM_MB_UNUSED]++; - *mb_id =3D vm->next_mb_id++; + *mb_id =3D vm->sbm.next_mb_id++; return 0; } =20 @@ -1643,7 +1643,7 @@ static void virtio_mem_refresh_config(struct virtio= _mem *vm) usable_region_size, &usable_region_size); end_addr =3D vm->addr + usable_region_size; end_addr =3D min(end_addr, phys_limit); - vm->last_usable_mb_id =3D virtio_mem_phys_to_mb_id(end_addr) - 1; + vm->sbm.last_usable_mb_id =3D virtio_mem_phys_to_mb_id(end_addr) - 1; =20 /* see if there is a request to change the size */ virtio_cread_le(vm->vdev, struct virtio_mem_config, requested_size, @@ -1834,9 +1834,9 @@ static int virtio_mem_init(struct virtio_mem *vm) vm->sbm.sbs_per_mb =3D memory_block_size_bytes() / vm->sbm.sb_size; =20 /* Round up to the next full memory block */ - vm->first_mb_id =3D virtio_mem_phys_to_mb_id(vm->addr - 1 + - memory_block_size_bytes()); - vm->next_mb_id =3D vm->first_mb_id; + vm->sbm.first_mb_id =3D virtio_mem_phys_to_mb_id(vm->addr - 1 + + memory_block_size_bytes()); + vm->sbm.next_mb_id =3D vm->sbm.first_mb_id; =20 /* Prepare the offline threshold - make sure we can add two blocks. */ vm->offline_threshold =3D max_t(uint64_t, 2 * memory_block_size_bytes()= , --=20 2.26.2