From: Long Li Date: Thu, 3 Nov 2022 19:16:26 +0000 (-0700) Subject: [PATCH 10/23] net: mana: Define max values for SGL entries X-Git-Tag: archive/raspbian/6.1.69-1+rpi1^2~21 X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=94afb4e8d66aed9cfb9bffe37e07190bdb504639;p=linux.git [PATCH 10/23] net: mana: Define max values for SGL entries The number of maximum SGl entries should be computed from the maximum WQE size for the intended queue type and the corresponding OOB data size. This guarantees the hardware queue can successfully queue requests up to the queue depth exposed to the upper layer. Reviewed-by: Dexuan Cui Signed-off-by: Long Li Link: https://lore.kernel.org/r/1667502990-2559-9-git-send-email-longli@linuxonhyperv.com Acked-by: Haiyang Zhang Signed-off-by: Leon Romanovsky (cherry picked from commit aa56549792fb348892fbbae67f6f0c71bb750b65) Signed-off-by: Bastian Blank Gbp-Pq: Topic features/all/ethernet-microsoft Gbp-Pq: Name 0010-net-mana-Define-max-values-for-SGL-entries.patch --- diff --git a/drivers/net/ethernet/microsoft/mana/mana_en.c b/drivers/net/ethernet/microsoft/mana/mana_en.c index f2cbc5f8e52..0e08b62760a 100644 --- a/drivers/net/ethernet/microsoft/mana/mana_en.c +++ b/drivers/net/ethernet/microsoft/mana/mana_en.c @@ -190,7 +190,7 @@ int mana_start_xmit(struct sk_buff *skb, struct net_device *ndev) pkg.wqe_req.client_data_unit = 0; pkg.wqe_req.num_sge = 1 + skb_shinfo(skb)->nr_frags; - WARN_ON_ONCE(pkg.wqe_req.num_sge > 30); + WARN_ON_ONCE(pkg.wqe_req.num_sge > MAX_TX_WQE_SGL_ENTRIES); if (pkg.wqe_req.num_sge <= ARRAY_SIZE(pkg.sgl_array)) { pkg.wqe_req.sgl = pkg.sgl_array; diff --git a/include/net/mana/gdma.h b/include/net/mana/gdma.h index 86d8a9e3600..11fc1cc67c0 100644 --- a/include/net/mana/gdma.h +++ b/include/net/mana/gdma.h @@ -431,6 +431,13 @@ struct gdma_wqe { #define MAX_TX_WQE_SIZE 512 #define MAX_RX_WQE_SIZE 256 +#define MAX_TX_WQE_SGL_ENTRIES ((GDMA_MAX_SQE_SIZE - \ + sizeof(struct gdma_sge) - INLINE_OOB_SMALL_SIZE) / \ + sizeof(struct gdma_sge)) + +#define MAX_RX_WQE_SGL_ENTRIES ((GDMA_MAX_RQE_SIZE - \ + sizeof(struct gdma_sge)) / sizeof(struct gdma_sge)) + struct gdma_cqe { u32 cqe_data[GDMA_COMP_DATA_SIZE / 4]; diff --git a/include/net/mana/mana.h b/include/net/mana/mana.h index 6e9e86fb4c0..713a8f8cca9 100644 --- a/include/net/mana/mana.h +++ b/include/net/mana/mana.h @@ -265,8 +265,6 @@ struct mana_cq { int budget; }; -#define GDMA_MAX_RQE_SGES 15 - struct mana_recv_buf_oob { /* A valid GDMA work request representing the data buffer. */ struct gdma_wqe_request wqe_req; @@ -276,7 +274,7 @@ struct mana_recv_buf_oob { /* SGL of the buffer going to be sent has part of the work request. */ u32 num_sge; - struct gdma_sge sgl[GDMA_MAX_RQE_SGES]; + struct gdma_sge sgl[MAX_RX_WQE_SGL_ENTRIES]; /* Required to store the result of mana_gd_post_work_request. * gdma_posted_wqe_info.wqe_size_in_bu is required for progressing the