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Mon, 9 May 2022 16:41:11 +0000 From: Frank Li To: peter.chen@kernel.org, pawell@cadence.com, rogerq@kernel.org, a-govindraju@ti.com, linux-usb@vger.kernel.org, jun.li@nxp.com, lznuaa@gmail.com Cc: gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org Subject: [PATCH v9 1/1] usb: cdns3: allocate TX FIFO size according to composite EP number Date: Mon, 9 May 2022 11:40:55 -0500 Message-Id: <20220509164055.1815081-1-Frank.Li@nxp.com> X-Mailer: git-send-email 2.35.1 X-ClientProxiedBy: BYAPR05CA0021.namprd05.prod.outlook.com (2603:10b6:a03:c0::34) To PAXPR04MB9186.eurprd04.prod.outlook.com (2603:10a6:102:232::18) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 41d77c54-7e9c-4731-8483-08da31dab99c X-MS-TrafficTypeDiagnostic: PA4PR04MB8029:EE_ X-Microsoft-Antispam-PRVS: X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255; 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To get better performance, need bigger CDNS3_EP_BUF_SIZE. But bigger CDNS3_EP_BUF_SIZE may exceed total hardware FIFO size when multiple endpoints. By introducing the check_config() callback, calculate CDNS3_EP_BUF_SIZE. Move CDNS3_EP_BUF_SIZE into cnds3_device: ep_buf_size Combine CDNS3_EP_ISO_SS_BURST and CDNS3_EP_ISO_HS_MULT into cnds3_device:ep_iso_burst Using a simple algorithm to calculate ep_buf_size. ep_buf_size = ep_iso_burst = (onchip_buffers - 2k) / (number of IN EP + 1). Test at 8qxp: Gadget ep_buf_size RNDIS: 5 RNDIS+ACM: 3 Mass Storage + NCM + ACM 2 Previous CDNS3_EP_BUF_SIZE is 4, RNDIS + ACM will be failure because exceed FIFO memory. Signed-off-by: Frank Li --- Change from v8 to v9 fix typo in commit message move max value check before cdns3_ep_onchip_buffer_reserve() remove priv_dev->ep_buf_size = 1 and priv_dev->ep_iso_burst = 1; Change from v2 to v8: mistake pump version to v8 Change from v1 to v2: Add safe check for mult, buffering and maxburst drivers/usb/cdns3/cdns3-gadget.c | 47 +++++++++++++++++++++++++++++--- drivers/usb/cdns3/cdns3-gadget.h | 9 ++++-- 2 files changed, 49 insertions(+), 7 deletions(-) diff --git a/drivers/usb/cdns3/cdns3-gadget.c b/drivers/usb/cdns3/cdns3-gadget.c index 1f3b4a1422126..3a3f323d9ce79 100644 --- a/drivers/usb/cdns3/cdns3-gadget.c +++ b/drivers/usb/cdns3/cdns3-gadget.c @@ -2050,7 +2050,7 @@ int cdns3_ep_config(struct cdns3_endpoint *priv_ep, bool enable) u8 mult = 0; int ret; - buffering = CDNS3_EP_BUF_SIZE - 1; + buffering = priv_dev->ep_buf_size - 1; cdns3_configure_dmult(priv_dev, priv_ep); @@ -2069,7 +2069,7 @@ int cdns3_ep_config(struct cdns3_endpoint *priv_ep, bool enable) break; default: ep_cfg = EP_CFG_EPTYPE(USB_ENDPOINT_XFER_ISOC); - mult = CDNS3_EP_ISO_HS_MULT - 1; + mult = priv_dev->ep_iso_burst - 1; buffering = mult + 1; } @@ -2085,14 +2085,14 @@ int cdns3_ep_config(struct cdns3_endpoint *priv_ep, bool enable) mult = 0; max_packet_size = 1024; if (priv_ep->type == USB_ENDPOINT_XFER_ISOC) { - maxburst = CDNS3_EP_ISO_SS_BURST - 1; + maxburst = priv_dev->ep_iso_burst - 1; buffering = (mult + 1) * (maxburst + 1); if (priv_ep->interval > 1) buffering++; } else { - maxburst = CDNS3_EP_BUF_SIZE - 1; + maxburst = priv_dev->ep_buf_size - 1; } break; default: @@ -2107,6 +2107,10 @@ int cdns3_ep_config(struct cdns3_endpoint *priv_ep, bool enable) else priv_ep->trb_burst_size = 16; + mult = min_t(u8, mult, EP_CFG_MULT_MAX); + buffering = min_t(u8, buffering, EP_CFG_BUFFERING_MAX); + maxburst = min_t(u8, maxburst, EP_CFG_MAXBURST_MAX); + /* onchip buffer is only allocated before configuration */ if (!priv_dev->hw_configured_flag) { ret = cdns3_ep_onchip_buffer_reserve(priv_dev, buffering + 1, @@ -2970,6 +2974,40 @@ static int cdns3_gadget_udc_stop(struct usb_gadget *gadget) return 0; } +/** + * cdns3_gadget_check_config - ensure cdns3 can support the USB configuration + * @gadget: pointer to the USB gadget + * + * Used to record the maximum number of endpoints being used in a USB composite + * device. (across all configurations) This is to be used in the calculation + * of the TXFIFO sizes when resizing internal memory for individual endpoints. + * It will help ensured that the resizing logic reserves enough space for at + * least one max packet. + */ +static int cdns3_gadget_check_config(struct usb_gadget *gadget) +{ + struct cdns3_device *priv_dev = gadget_to_cdns3_device(gadget); + struct usb_ep *ep; + int n_in = 0; + int total; + + list_for_each_entry(ep, &gadget->ep_list, ep_list) { + if (ep->claimed && (ep->address & USB_DIR_IN)) + n_in++; + } + + /* 2KB are reserved for EP0, 1KB for out*/ + total = 2 + n_in + 1; + + if (total > priv_dev->onchip_buffers) + return -ENOMEM; + + priv_dev->ep_buf_size = priv_dev->ep_iso_burst = + (priv_dev->onchip_buffers - 2) / (n_in + 1); + + return 0; +} + static const struct usb_gadget_ops cdns3_gadget_ops = { .get_frame = cdns3_gadget_get_frame, .wakeup = cdns3_gadget_wakeup, @@ -2978,6 +3016,7 @@ static const struct usb_gadget_ops cdns3_gadget_ops = { .udc_start = cdns3_gadget_udc_start, .udc_stop = cdns3_gadget_udc_stop, .match_ep = cdns3_gadget_match_ep, + .check_config = cdns3_gadget_check_config, }; static void cdns3_free_all_eps(struct cdns3_device *priv_dev) diff --git a/drivers/usb/cdns3/cdns3-gadget.h b/drivers/usb/cdns3/cdns3-gadget.h index c5660f2c4293f..fbe4a8e3aa897 100644 --- a/drivers/usb/cdns3/cdns3-gadget.h +++ b/drivers/usb/cdns3/cdns3-gadget.h @@ -562,15 +562,18 @@ struct cdns3_usb_regs { /* Max burst size (used only in SS mode). */ #define EP_CFG_MAXBURST_MASK GENMASK(11, 8) #define EP_CFG_MAXBURST(p) (((p) << 8) & EP_CFG_MAXBURST_MASK) +#define EP_CFG_MAXBURST_MAX 15 /* ISO max burst. */ #define EP_CFG_MULT_MASK GENMASK(15, 14) #define EP_CFG_MULT(p) (((p) << 14) & EP_CFG_MULT_MASK) +#define EP_CFG_MULT_MAX 2 /* ISO max burst. */ #define EP_CFG_MAXPKTSIZE_MASK GENMASK(26, 16) #define EP_CFG_MAXPKTSIZE(p) (((p) << 16) & EP_CFG_MAXPKTSIZE_MASK) /* Max number of buffered packets. */ #define EP_CFG_BUFFERING_MASK GENMASK(31, 27) #define EP_CFG_BUFFERING(p) (((p) << 27) & EP_CFG_BUFFERING_MASK) +#define EP_CFG_BUFFERING_MAX 15 /* EP_CMD - bitmasks */ /* Endpoint reset. */ @@ -1094,9 +1097,6 @@ struct cdns3_trb { #define CDNS3_ENDPOINTS_MAX_COUNT 32 #define CDNS3_EP_ZLP_BUF_SIZE 1024 -#define CDNS3_EP_BUF_SIZE 4 /* KB */ -#define CDNS3_EP_ISO_HS_MULT 3 -#define CDNS3_EP_ISO_SS_BURST 3 #define CDNS3_MAX_NUM_DESCMISS_BUF 32 #define CDNS3_DESCMIS_BUF_SIZE 2048 /* Bytes */ #define CDNS3_WA2_NUM_BUFFERS 128 @@ -1333,6 +1333,9 @@ struct cdns3_device { /*in KB */ u16 onchip_buffers; u16 onchip_used_size; + + u16 ep_buf_size; + u16 ep_iso_burst; }; void cdns3_set_register_bit(void __iomem *ptr, u32 mask);