From 25d0dbcbd5c746631ec1ee08bbbc4eba86bb9163 Mon Sep 17 00:00:00 2001 From: Michal Kazior Date: Fri, 28 Mar 2014 10:02:38 +0200 Subject: [PATCH] ath10k: split ce initialization and allocation Definitions by which copy engine structure are allocated do not change so it doesn't make much sense to re-create those structures each time device is booted (e.g. due to firmware recovery). This should decrease chance of memory allocation failures. While at it remove per_transfer_context pointer indirection. The array has been trailing the copy engine ringbuffer structure anyway. This also saves pointer size worth of bytes for each copy engine ringbuffer. Reported-By: Avery Pennarun Signed-off-by: Michal Kazior Signed-off-by: Kalle Valo --- drivers/net/wireless/ath/ath10k/ce.c | 307 +++++++++++++++----------- drivers/net/wireless/ath/ath10k/ce.h | 15 +- drivers/net/wireless/ath/ath10k/pci.c | 64 ++++-- 3 files changed, 228 insertions(+), 158 deletions(-) diff --git a/drivers/net/wireless/ath/ath10k/ce.c b/drivers/net/wireless/ath/ath10k/ce.c index 653a240142e5..1e4cad8632b5 100644 --- a/drivers/net/wireless/ath/ath10k/ce.c +++ b/drivers/net/wireless/ath/ath10k/ce.c @@ -840,34 +840,17 @@ void ath10k_ce_recv_cb_register(struct ath10k_ce_pipe *ce_state, static int ath10k_ce_init_src_ring(struct ath10k *ar, unsigned int ce_id, - struct ath10k_ce_pipe *ce_state, const struct ce_attr *attr) { - struct ath10k_ce_ring *src_ring; - unsigned int nentries = attr->src_nentries; - unsigned int ce_nbytes; - u32 ctrl_addr = ath10k_ce_base_address(ce_id); - dma_addr_t base_addr; - char *ptr; - - nentries = roundup_pow_of_two(nentries); - - if (ce_state->src_ring) { - WARN_ON(ce_state->src_ring->nentries != nentries); - return 0; - } + struct ath10k_pci *ar_pci = ath10k_pci_priv(ar); + struct ath10k_ce_pipe *ce_state = &ar_pci->ce_states[ce_id]; + struct ath10k_ce_ring *src_ring = ce_state->src_ring; + u32 nentries, ctrl_addr = ath10k_ce_base_address(ce_id); - ce_nbytes = sizeof(struct ath10k_ce_ring) + (nentries * sizeof(void *)); - ptr = kzalloc(ce_nbytes, GFP_KERNEL); - if (ptr == NULL) - return -ENOMEM; + nentries = roundup_pow_of_two(attr->src_nentries); - ce_state->src_ring = (struct ath10k_ce_ring *)ptr; - src_ring = ce_state->src_ring; - - ptr += sizeof(struct ath10k_ce_ring); - src_ring->nentries = nentries; - src_ring->nentries_mask = nentries - 1; + memset(src_ring->per_transfer_context, 0, + nentries * sizeof(*src_ring->per_transfer_context)); src_ring->sw_index = ath10k_ce_src_ring_read_index_get(ar, ctrl_addr); src_ring->sw_index &= src_ring->nentries_mask; @@ -877,7 +860,74 @@ static int ath10k_ce_init_src_ring(struct ath10k *ar, ath10k_ce_src_ring_write_index_get(ar, ctrl_addr); src_ring->write_index &= src_ring->nentries_mask; - src_ring->per_transfer_context = (void **)ptr; + ath10k_ce_src_ring_base_addr_set(ar, ctrl_addr, + src_ring->base_addr_ce_space); + ath10k_ce_src_ring_size_set(ar, ctrl_addr, nentries); + ath10k_ce_src_ring_dmax_set(ar, ctrl_addr, attr->src_sz_max); + ath10k_ce_src_ring_byte_swap_set(ar, ctrl_addr, 0); + ath10k_ce_src_ring_lowmark_set(ar, ctrl_addr, 0); + ath10k_ce_src_ring_highmark_set(ar, ctrl_addr, nentries); + + ath10k_dbg(ATH10K_DBG_BOOT, + "boot init ce src ring id %d entries %d base_addr %p\n", + ce_id, nentries, src_ring->base_addr_owner_space); + + return 0; +} + +static int ath10k_ce_init_dest_ring(struct ath10k *ar, + unsigned int ce_id, + const struct ce_attr *attr) +{ + struct ath10k_pci *ar_pci = ath10k_pci_priv(ar); + struct ath10k_ce_pipe *ce_state = &ar_pci->ce_states[ce_id]; + struct ath10k_ce_ring *dest_ring = ce_state->dest_ring; + u32 nentries, ctrl_addr = ath10k_ce_base_address(ce_id); + + nentries = roundup_pow_of_two(attr->dest_nentries); + + memset(dest_ring->per_transfer_context, 0, + nentries * sizeof(*dest_ring->per_transfer_context)); + + dest_ring->sw_index = ath10k_ce_dest_ring_read_index_get(ar, ctrl_addr); + dest_ring->sw_index &= dest_ring->nentries_mask; + dest_ring->write_index = + ath10k_ce_dest_ring_write_index_get(ar, ctrl_addr); + dest_ring->write_index &= dest_ring->nentries_mask; + + ath10k_ce_dest_ring_base_addr_set(ar, ctrl_addr, + dest_ring->base_addr_ce_space); + ath10k_ce_dest_ring_size_set(ar, ctrl_addr, nentries); + ath10k_ce_dest_ring_byte_swap_set(ar, ctrl_addr, 0); + ath10k_ce_dest_ring_lowmark_set(ar, ctrl_addr, 0); + ath10k_ce_dest_ring_highmark_set(ar, ctrl_addr, nentries); + + ath10k_dbg(ATH10K_DBG_BOOT, + "boot ce dest ring id %d entries %d base_addr %p\n", + ce_id, nentries, dest_ring->base_addr_owner_space); + + return 0; +} + +static struct ath10k_ce_ring * +ath10k_ce_alloc_src_ring(struct ath10k *ar, unsigned int ce_id, + const struct ce_attr *attr) +{ + struct ath10k_ce_ring *src_ring; + u32 nentries = attr->src_nentries; + dma_addr_t base_addr; + + nentries = roundup_pow_of_two(nentries); + + src_ring = kzalloc(sizeof(*src_ring) + + (nentries * + sizeof(*src_ring->per_transfer_context)), + GFP_KERNEL); + if (src_ring == NULL) + return ERR_PTR(-ENOMEM); + + src_ring->nentries = nentries; + src_ring->nentries_mask = nentries - 1; /* * Legacy platforms that do not support cache @@ -889,9 +939,8 @@ static int ath10k_ce_init_src_ring(struct ath10k *ar, CE_DESC_RING_ALIGN), &base_addr, GFP_KERNEL); if (!src_ring->base_addr_owner_space_unaligned) { - kfree(ce_state->src_ring); - ce_state->src_ring = NULL; - return -ENOMEM; + kfree(src_ring); + return ERR_PTR(-ENOMEM); } src_ring->base_addr_ce_space_unaligned = base_addr; @@ -916,69 +965,37 @@ static int ath10k_ce_init_src_ring(struct ath10k *ar, CE_DESC_RING_ALIGN), src_ring->base_addr_owner_space, src_ring->base_addr_ce_space); - kfree(ce_state->src_ring); - ce_state->src_ring = NULL; - return -ENOMEM; + kfree(src_ring); + return ERR_PTR(-ENOMEM); } src_ring->shadow_base = PTR_ALIGN( src_ring->shadow_base_unaligned, CE_DESC_RING_ALIGN); - ath10k_ce_src_ring_base_addr_set(ar, ctrl_addr, - src_ring->base_addr_ce_space); - ath10k_ce_src_ring_size_set(ar, ctrl_addr, nentries); - ath10k_ce_src_ring_dmax_set(ar, ctrl_addr, attr->src_sz_max); - ath10k_ce_src_ring_byte_swap_set(ar, ctrl_addr, 0); - ath10k_ce_src_ring_lowmark_set(ar, ctrl_addr, 0); - ath10k_ce_src_ring_highmark_set(ar, ctrl_addr, nentries); - - ath10k_dbg(ATH10K_DBG_BOOT, - "boot ce src ring id %d entries %d base_addr %p\n", - ce_id, nentries, src_ring->base_addr_owner_space); - - return 0; + return src_ring; } -static int ath10k_ce_init_dest_ring(struct ath10k *ar, - unsigned int ce_id, - struct ath10k_ce_pipe *ce_state, - const struct ce_attr *attr) +static struct ath10k_ce_ring * +ath10k_ce_alloc_dest_ring(struct ath10k *ar, unsigned int ce_id, + const struct ce_attr *attr) { struct ath10k_ce_ring *dest_ring; - unsigned int nentries = attr->dest_nentries; - unsigned int ce_nbytes; - u32 ctrl_addr = ath10k_ce_base_address(ce_id); + u32 nentries; dma_addr_t base_addr; - char *ptr; - nentries = roundup_pow_of_two(nentries); + nentries = roundup_pow_of_two(attr->dest_nentries); - if (ce_state->dest_ring) { - WARN_ON(ce_state->dest_ring->nentries != nentries); - return 0; - } - - ce_nbytes = sizeof(struct ath10k_ce_ring) + (nentries * sizeof(void *)); - ptr = kzalloc(ce_nbytes, GFP_KERNEL); - if (ptr == NULL) - return -ENOMEM; - - ce_state->dest_ring = (struct ath10k_ce_ring *)ptr; - dest_ring = ce_state->dest_ring; + dest_ring = kzalloc(sizeof(*dest_ring) + + (nentries * + sizeof(*dest_ring->per_transfer_context)), + GFP_KERNEL); + if (dest_ring == NULL) + return ERR_PTR(-ENOMEM); - ptr += sizeof(struct ath10k_ce_ring); dest_ring->nentries = nentries; dest_ring->nentries_mask = nentries - 1; - dest_ring->sw_index = ath10k_ce_dest_ring_read_index_get(ar, ctrl_addr); - dest_ring->sw_index &= dest_ring->nentries_mask; - dest_ring->write_index = - ath10k_ce_dest_ring_write_index_get(ar, ctrl_addr); - dest_ring->write_index &= dest_ring->nentries_mask; - - dest_ring->per_transfer_context = (void **)ptr; - /* * Legacy platforms that do not support cache * coherent DMA are unsupported @@ -989,9 +1006,8 @@ static int ath10k_ce_init_dest_ring(struct ath10k *ar, CE_DESC_RING_ALIGN), &base_addr, GFP_KERNEL); if (!dest_ring->base_addr_owner_space_unaligned) { - kfree(ce_state->dest_ring); - ce_state->dest_ring = NULL; - return -ENOMEM; + kfree(dest_ring); + return ERR_PTR(-ENOMEM); } dest_ring->base_addr_ce_space_unaligned = base_addr; @@ -1010,39 +1026,7 @@ static int ath10k_ce_init_dest_ring(struct ath10k *ar, dest_ring->base_addr_ce_space_unaligned, CE_DESC_RING_ALIGN); - ath10k_ce_dest_ring_base_addr_set(ar, ctrl_addr, - dest_ring->base_addr_ce_space); - ath10k_ce_dest_ring_size_set(ar, ctrl_addr, nentries); - ath10k_ce_dest_ring_byte_swap_set(ar, ctrl_addr, 0); - ath10k_ce_dest_ring_lowmark_set(ar, ctrl_addr, 0); - ath10k_ce_dest_ring_highmark_set(ar, ctrl_addr, nentries); - - ath10k_dbg(ATH10K_DBG_BOOT, - "boot ce dest ring id %d entries %d base_addr %p\n", - ce_id, nentries, dest_ring->base_addr_owner_space); - - return 0; -} - -static struct ath10k_ce_pipe *ath10k_ce_init_state(struct ath10k *ar, - unsigned int ce_id, - const struct ce_attr *attr) -{ - struct ath10k_pci *ar_pci = ath10k_pci_priv(ar); - struct ath10k_ce_pipe *ce_state = &ar_pci->ce_states[ce_id]; - u32 ctrl_addr = ath10k_ce_base_address(ce_id); - - spin_lock_bh(&ar_pci->ce_lock); - - ce_state->ar = ar; - ce_state->id = ce_id; - ce_state->ctrl_addr = ctrl_addr; - ce_state->attr_flags = attr->flags; - ce_state->src_sz_max = attr->src_sz_max; - - spin_unlock_bh(&ar_pci->ce_lock); - - return ce_state; + return dest_ring; } /* @@ -1052,11 +1036,11 @@ static struct ath10k_ce_pipe *ath10k_ce_init_state(struct ath10k *ar, * initialization. It may be that only one side or the other is * initialized by software/firmware. */ -struct ath10k_ce_pipe *ath10k_ce_init(struct ath10k *ar, - unsigned int ce_id, - const struct ce_attr *attr) +int ath10k_ce_init_pipe(struct ath10k *ar, unsigned int ce_id, + const struct ce_attr *attr) { - struct ath10k_ce_pipe *ce_state; + struct ath10k_pci *ar_pci = ath10k_pci_priv(ar); + struct ath10k_ce_pipe *ce_state = &ar_pci->ce_states[ce_id]; int ret; /* @@ -1072,44 +1056,109 @@ struct ath10k_ce_pipe *ath10k_ce_init(struct ath10k *ar, ret = ath10k_pci_wake(ar); if (ret) - return NULL; + return ret; - ce_state = ath10k_ce_init_state(ar, ce_id, attr); - if (!ce_state) { - ath10k_err("Failed to initialize CE state for ID: %d\n", ce_id); - goto out; - } + spin_lock_bh(&ar_pci->ce_lock); + ce_state->ar = ar; + ce_state->id = ce_id; + ce_state->ctrl_addr = ath10k_ce_base_address(ce_id); + ce_state->attr_flags = attr->flags; + ce_state->src_sz_max = attr->src_sz_max; + spin_unlock_bh(&ar_pci->ce_lock); if (attr->src_nentries) { - ret = ath10k_ce_init_src_ring(ar, ce_id, ce_state, attr); + ret = ath10k_ce_init_src_ring(ar, ce_id, attr); if (ret) { ath10k_err("Failed to initialize CE src ring for ID: %d (%d)\n", ce_id, ret); - ath10k_ce_deinit(ce_state); - ce_state = NULL; goto out; } } if (attr->dest_nentries) { - ret = ath10k_ce_init_dest_ring(ar, ce_id, ce_state, attr); + ret = ath10k_ce_init_dest_ring(ar, ce_id, attr); if (ret) { ath10k_err("Failed to initialize CE dest ring for ID: %d (%d)\n", ce_id, ret); - ath10k_ce_deinit(ce_state); - ce_state = NULL; goto out; } } out: ath10k_pci_sleep(ar); - return ce_state; + return ret; } -void ath10k_ce_deinit(struct ath10k_ce_pipe *ce_state) +static void ath10k_ce_deinit_src_ring(struct ath10k *ar, unsigned int ce_id) { - struct ath10k *ar = ce_state->ar; + u32 ctrl_addr = ath10k_ce_base_address(ce_id); + + ath10k_ce_src_ring_base_addr_set(ar, ctrl_addr, 0); + ath10k_ce_src_ring_size_set(ar, ctrl_addr, 0); + ath10k_ce_src_ring_dmax_set(ar, ctrl_addr, 0); + ath10k_ce_src_ring_highmark_set(ar, ctrl_addr, 0); +} + +static void ath10k_ce_deinit_dest_ring(struct ath10k *ar, unsigned int ce_id) +{ + u32 ctrl_addr = ath10k_ce_base_address(ce_id); + + ath10k_ce_dest_ring_base_addr_set(ar, ctrl_addr, 0); + ath10k_ce_dest_ring_size_set(ar, ctrl_addr, 0); + ath10k_ce_dest_ring_highmark_set(ar, ctrl_addr, 0); +} + +void ath10k_ce_deinit_pipe(struct ath10k *ar, unsigned int ce_id) +{ + int ret; + + ret = ath10k_pci_wake(ar); + if (ret) + return; + + ath10k_ce_deinit_src_ring(ar, ce_id); + ath10k_ce_deinit_dest_ring(ar, ce_id); + + ath10k_pci_sleep(ar); +} + +int ath10k_ce_alloc_pipe(struct ath10k *ar, int ce_id, + const struct ce_attr *attr) +{ + struct ath10k_pci *ar_pci = ath10k_pci_priv(ar); + struct ath10k_ce_pipe *ce_state = &ar_pci->ce_states[ce_id]; + int ret; + + if (attr->src_nentries) { + ce_state->src_ring = ath10k_ce_alloc_src_ring(ar, ce_id, attr); + if (IS_ERR(ce_state->src_ring)) { + ret = PTR_ERR(ce_state->src_ring); + ath10k_err("failed to allocate copy engine source ring %d: %d\n", + ce_id, ret); + ce_state->src_ring = NULL; + return ret; + } + } + + if (attr->dest_nentries) { + ce_state->dest_ring = ath10k_ce_alloc_dest_ring(ar, ce_id, + attr); + if (IS_ERR(ce_state->dest_ring)) { + ret = PTR_ERR(ce_state->dest_ring); + ath10k_err("failed to allocate copy engine destination ring %d: %d\n", + ce_id, ret); + ce_state->dest_ring = NULL; + return ret; + } + } + + return 0; +} + +void ath10k_ce_free_pipe(struct ath10k *ar, int ce_id) +{ + struct ath10k_pci *ar_pci = ath10k_pci_priv(ar); + struct ath10k_ce_pipe *ce_state = &ar_pci->ce_states[ce_id]; if (ce_state->src_ring) { kfree(ce_state->src_ring->shadow_base_unaligned); diff --git a/drivers/net/wireless/ath/ath10k/ce.h b/drivers/net/wireless/ath/ath10k/ce.h index 8eb7f99ed992..fd0bc3561e42 100644 --- a/drivers/net/wireless/ath/ath10k/ce.h +++ b/drivers/net/wireless/ath/ath10k/ce.h @@ -104,7 +104,8 @@ struct ath10k_ce_ring { void *shadow_base_unaligned; struct ce_desc *shadow_base; - void **per_transfer_context; + /* keep last */ + void *per_transfer_context[0]; }; struct ath10k_ce_pipe { @@ -210,10 +211,12 @@ int ath10k_ce_completed_send_next(struct ath10k_ce_pipe *ce_state, /*==================CE Engine Initialization=======================*/ -/* Initialize an instance of a CE */ -struct ath10k_ce_pipe *ath10k_ce_init(struct ath10k *ar, - unsigned int ce_id, - const struct ce_attr *attr); +int ath10k_ce_init_pipe(struct ath10k *ar, unsigned int ce_id, + const struct ce_attr *attr); +void ath10k_ce_deinit_pipe(struct ath10k *ar, unsigned int ce_id); +int ath10k_ce_alloc_pipe(struct ath10k *ar, int ce_id, + const struct ce_attr *attr); +void ath10k_ce_free_pipe(struct ath10k *ar, int ce_id); /*==================CE Engine Shutdown=======================*/ /* @@ -236,8 +239,6 @@ int ath10k_ce_cancel_send_next(struct ath10k_ce_pipe *ce_state, unsigned int *nbytesp, unsigned int *transfer_idp); -void ath10k_ce_deinit(struct ath10k_ce_pipe *ce_state); - /*==================CE Interrupt Handlers====================*/ void ath10k_ce_per_engine_service_any(struct ath10k *ar); void ath10k_ce_per_engine_service(struct ath10k *ar, unsigned int ce_id); diff --git a/drivers/net/wireless/ath/ath10k/pci.c b/drivers/net/wireless/ath/ath10k/pci.c index 337af7e22b30..7995b0d23b1e 100644 --- a/drivers/net/wireless/ath/ath10k/pci.c +++ b/drivers/net/wireless/ath/ath10k/pci.c @@ -1258,18 +1258,10 @@ static void ath10k_pci_buffer_cleanup(struct ath10k *ar) static void ath10k_pci_ce_deinit(struct ath10k *ar) { - struct ath10k_pci *ar_pci = ath10k_pci_priv(ar); - struct ath10k_pci_pipe *pipe_info; - int pipe_num; + int i; - for (pipe_num = 0; pipe_num < CE_COUNT; pipe_num++) { - pipe_info = &ar_pci->pipe_info[pipe_num]; - if (pipe_info->ce_hdl) { - ath10k_ce_deinit(pipe_info->ce_hdl); - pipe_info->ce_hdl = NULL; - pipe_info->buf_sz = 0; - } - } + for (i = 0; i < CE_COUNT; i++) + ath10k_ce_deinit_pipe(ar, i); } static void ath10k_pci_hif_stop(struct ath10k *ar) @@ -1722,30 +1714,49 @@ static int ath10k_pci_init_config(struct ath10k *ar) return 0; } +static int ath10k_pci_alloc_ce(struct ath10k *ar) +{ + int i, ret; + + for (i = 0; i < CE_COUNT; i++) { + ret = ath10k_ce_alloc_pipe(ar, i, &host_ce_config_wlan[i]); + if (ret) { + ath10k_err("failed to allocate copy engine pipe %d: %d\n", + i, ret); + return ret; + } + } + + return 0; +} + +static void ath10k_pci_free_ce(struct ath10k *ar) +{ + int i; + for (i = 0; i < CE_COUNT; i++) + ath10k_ce_free_pipe(ar, i); +} static int ath10k_pci_ce_init(struct ath10k *ar) { struct ath10k_pci *ar_pci = ath10k_pci_priv(ar); struct ath10k_pci_pipe *pipe_info; const struct ce_attr *attr; - int pipe_num; + int pipe_num, ret; for (pipe_num = 0; pipe_num < CE_COUNT; pipe_num++) { pipe_info = &ar_pci->pipe_info[pipe_num]; + pipe_info->ce_hdl = &ar_pci->ce_states[pipe_num]; pipe_info->pipe_num = pipe_num; pipe_info->hif_ce_state = ar; attr = &host_ce_config_wlan[pipe_num]; - pipe_info->ce_hdl = ath10k_ce_init(ar, pipe_num, attr); - if (pipe_info->ce_hdl == NULL) { - ath10k_err("failed to initialize CE for pipe: %d\n", - pipe_num); - - /* It is safe to call it here. It checks if ce_hdl is - * valid for each pipe */ - ath10k_pci_ce_deinit(ar); - return -1; + ret = ath10k_ce_init_pipe(ar, pipe_num, attr); + if (ret) { + ath10k_err("failed to initialize copy engine pipe %d: %d\n", + pipe_num, ret); + return ret; } if (pipe_num == CE_COUNT - 1) { @@ -2648,16 +2659,24 @@ static int ath10k_pci_probe(struct pci_dev *pdev, ath10k_do_pci_sleep(ar); + ret = ath10k_pci_alloc_ce(ar); + if (ret) { + ath10k_err("failed to allocate copy engine pipes: %d\n", ret); + goto err_iomap; + } + ath10k_dbg(ATH10K_DBG_BOOT, "boot pci_mem 0x%p\n", ar_pci->mem); ret = ath10k_core_register(ar, chip_id); if (ret) { ath10k_err("failed to register driver core: %d\n", ret); - goto err_iomap; + goto err_free_ce; } return 0; +err_free_ce: + ath10k_pci_free_ce(ar); err_iomap: pci_iounmap(pdev, mem); err_master: @@ -2693,6 +2712,7 @@ static void ath10k_pci_remove(struct pci_dev *pdev) tasklet_kill(&ar_pci->msi_fw_err); ath10k_core_unregister(ar); + ath10k_pci_free_ce(ar); pci_iounmap(pdev, ar_pci->mem); pci_release_region(pdev, BAR_NUM); -- GitLab