[45/88] esp.c: remove do_cmd from ESPState

Message ID	20240112125420.514425-46-mark.cave-ayland@ilande.co.uk (mailing list archive)
State	New, archived
Headers	show Return-Path: <qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org> From: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> To: pbonzini@redhat.com, fam@euphon.net, hpoussin@reactos.org, laurent@vivier.eu, thuth@redhat.com, qemu-devel@nongnu.org Date: Fri, 12 Jan 2024 12:53:37 +0000 Message-Id: <20240112125420.514425-46-mark.cave-ayland@ilande.co.uk> In-Reply-To: <20240112125420.514425-1-mark.cave-ayland@ilande.co.uk> References: <20240112125420.514425-1-mark.cave-ayland@ilande.co.uk> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: [PATCH 45/88] esp.c: remove do_cmd from ESPState Received-SPF: pass client-ip=2001:41c9:1:41f::167; envelope-from=mark.cave-ayland@ilande.co.uk; helo=mail.ilande.co.uk X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action Precedence: list Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org
Series	esp: rework ESP emulation to use a SCSI phase-based state machine \| expand [00/88] esp: rework ESP emulation to use a SCSI phase-based state machine [01/88] esp: don't clear cmdfifo when esp_select() fails in get_cmd() [02/88] esp: move existing request cancel check into esp_select() [03/88] esp.c: add FIFO wraparound support to esp_fifo_pop_buf() [04/88] esp: remove FIFO clear from esp_select() [05/88] esp: move esp_select() to ESP selection commands from get_cmd() [06/88] esp: update esp_set_tc() to set STAT_TC flag [07/88] esp: start removal of manual STAT_TC setting when transfer counter reaches zero [08/88] esp: move command execution logic to new esp_run_cmd() function [09/88] esp: update TC check logic in do_dma_pdma_cb() to check for TC == 0 [10/88] esp: move buffer and TC logic into separate to/from device paths in esp_do_dma() [11/88] esp.c: remove unused case from esp_pdma_read() [12/88] esp.c: don't accumulate directly into cmdfifo [13/88] esp.c: decrement the TC during MESSAGE OUT and COMMAND phases [14/88] esp.c: introduce esp_set_phase() helper function [15/88] esp.c: remove another set of manual STAT_TC updates [16/88] esp.c: remove MacOS TI workaround that pads FIFO transfers to ESP_FIFO_SZ [17/88] esp.c: don't reset the TC and ESP_RSEQ state when executing a SCSI command [18/88] esp.c: don't clear RFLAGS register when DMA is complete [19/88] esp: remove zero transfer size check from esp_do_dma() [20/88] esp.c: update condition for esp_dma_done() in esp_do_dma() from device path [21/88] esp.c: update condition for esp_dma_done() in esp_do_dma() to device path [22/88] esp.c: ensure that the PDMA callback is called for every device read [23/88] esp.c: don't immediately raise INTR_BS if SCSI data needed in esp_do_dma() [24/88] esp.c: remove TC adjustment in esp_do_dma() from device path [25/88] esp.c: remove unaligned adjustment in do_dma_pdma_cb() to device path [26/88] esp.c: remove unneeded if() check in esp_transfer_data() [27/88] esp.c: update end of transfer logic at the end of esp_transfer_data() [28/88] esp.c: consolidate async_len and TC == 0 checks in do_dma_pdma_cb() and esp_do_dma() [29/88] esp.c: fix premature end of phase logic esp_command_complete [30/88] esp.c: move TC and FIFO check logic into esp_dma_done() [31/88] esp.c: rename esp_dma_done() to esp_dma_ti_check() [32/88] esp.c: copy PDMA logic for transfers to device from do_dma_pdma_cb() to esp_do_dma() [33/88] esp.c: copy logic for do_cmd transfers from do_dma_pdma_cb() to esp_do_dma() [34/88] esp.c: update esp_do_dma() bypass if async_len is zero to include non-zero transfer check [35/88] esp.c: move end of SCSI transfer check after TC adjustment in do_dma_pdma_cb() [36/88] esp.c: remove s_without_satn_pdma_cb() PDMA callback [37/88] esp.c: introduce esp_get_phase() function [38/88] esp.c: convert esp_do_dma() to switch statement based upon SCSI phase [39/88] esp.c: convert do_dma_pdma_db() to switch statement based upon SCSI phase [40/88] esp.c: convert esp_do_nodma() to switch statement based upon SCSI phase [41/88] esp.c: convert esp_do_dma() do_cmd path to check for SCSI phase instead [42/88] esp.c: convert do_dma_pdma_cb() do_cmd path to check for SCSI phase instead [43/88] esp.c: convert esp_do_nodma() do_cmd path to check for SCSI phase instead [44/88] esp.c: convert esp_reg_write() do_cmd path to check for SCSI phase instead [45/88] esp.c: remove do_cmd from ESPState [46/88] esp.c: untangle MESSAGE OUT and COMMAND phase logic in esp_do_dma() [47/88] esp.c: untangle MESSAGE OUT and COMMAND phase logic in do_dma_pdma_cb() [48/88] esp.c: untangle MESSAGE OUT and COMMAND phase logic in esp_do_nodma() [49/88] esp.c: move CMD_SELATN end of message phase detection to esp_do_dma() and do_dma_pdma_cb() [50/88] esp.c: move CMD_TI end of message phase detection to esp_do_dma() and do_dma_pdma_cb() [51/88] esp.c: don't use get_cmd() for CMD_SEL DMA commands [52/88] esp.c: move CMD_SELATNS end of command logic to esp_do_dma() and do_dma_pdma_cb() [53/88] esp.c: replace do_dma_pdma_cb() with esp_do_dma() [54/88] esp.c: move CMD_ICCS command logic to esp_do_dma() [55/88] esp.c: always use esp_do_dma() in pdma_cb() [56/88] esp.c: remove unused PDMA callback implementation [57/88] esp.c: rename data_in_ready to to data_ready [58/88] esp.c: separate logic based upon ESP command in esp_command_complete() [59/88] esp.c: separate logic based upon ESP command in esp_transfer_data() [60/88] esp.c: use deferred interrupts for both DATA IN and DATA OUT phases [61/88] esp.c: remove DATA IN phase logic when reading from FIFO [62/88] esp.c: zero command register when TI command terminates due to phase change [63/88] esp.c: remove unneeded ti_cmd field [64/88] esp.c: don't raise INTR_BS interrupt in DATA IN phase until TI command issued [65/88] esp.c: move non-DMA TI logic to separate esp_nodma_ti_dataout() function [66/88] esp.c: process non-DMA FIFO writes in esp_do_nodma() [67/88] esp.c: replace get_cmd() with esp_do_nodma() [68/88] esp.c: move write_response() non-DMA logic to esp_do_nodma() [69/88] esp.c: consolidate end of command sequence after ICCS command [70/88] esp.c: ensure that STAT_INT is cleared when reading ESP_RINTR [71/88] esp.c: don't clear the SCSI phase when reading ESP_RINTR [72/88] esp.c: handle TC underflow for DMA SCSI requests [73/88] esp.c: remove restriction on FIFO read access when DMA memory routines defined [74/88] esp.c: handle non-DMA FIFO writes used to terminate DMA commands [75/88] esp.c: improve ESP_RSEQ logic consolidation [76/88] esp.c: only transfer non-DMA COMMAND phase data for specific commands [77/88] esp.c: only transfer non-DMA MESSAGE OUT phase data for specific commands [78/88] esp.c: consolidate DMA and PDMA logic in DATA OUT phase [79/88] esp.c: consolidate DMA and PDMA logic in DATA IN phase [80/88] esp.c: consolidate DMA and PDMA logic in MESSAGE OUT phase [81/88] esp.c: remove redundant n variable in PDMA COMMAND phase [82/88] esp.c: consolidate DMA and PDMA logic in STATUS and MESSAGE IN phases [83/88] esp.c: replace n variable with len in esp_do_nodma() [84/88] esp.c: implement DMA Transfer Pad command for DATA phases [85/88] esp.c: rename irq_data IRQ to drq_irq [86/88] esp.c: keep track of the DRQ state during DMA [87/88] esp.c: switch TypeInfo registration to use DEFINE_TYPES() macro [88/88] esp.c: add my copyright to the file

Message ID

20240112125420.514425-46-mark.cave-ayland@ilande.co.uk (mailing list archive)

State

New, archived

Headers

From: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
To: pbonzini@redhat.com, fam@euphon.net, hpoussin@reactos.org,
 laurent@vivier.eu, thuth@redhat.com, qemu-devel@nongnu.org
Date: Fri, 12 Jan 2024 12:53:37 +0000
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In-Reply-To: <20240112125420.514425-1-mark.cave-ayland@ilande.co.uk>
References: <20240112125420.514425-1-mark.cave-ayland@ilande.co.uk>
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Subject: [PATCH 45/88] esp.c: remove do_cmd from ESPState
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Series

esp: rework ESP emulation to use a SCSI phase-based state machine | expand

Commit Message

Mark Cave-Ayland Jan. 12, 2024, 12:53 p.m. UTC

Now that the accumulation of the CDB is handled by SCSI phase, there is no need
for a separate variable to control it.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
---
 hw/scsi/esp.c | 13 -------------
 1 file changed, 13 deletions(-)

diff --git a/hw/scsi/esp.c b/hw/scsi/esp.c
index e679b1c39b..1f7dff4ca6 100644
--- a/hw/scsi/esp.c
+++ b/hw/scsi/esp.c
@@ -380,7 +380,6 @@  static void satn_pdma_cb(ESPState *s)
 
     if (!esp_get_tc(s) && !fifo8_is_empty(&s->cmdfifo)) {
         s->cmdfifo_cdb_offset = 1;
-        s->do_cmd = 0;
         do_cmd(s);
     }
 }
@@ -400,13 +399,11 @@  static void handle_satn(ESPState *s)
     cmdlen = get_cmd(s, ESP_CMDFIFO_SZ);
     if (cmdlen > 0) {
         s->cmdfifo_cdb_offset = 1;
-        s->do_cmd = 0;
         do_cmd(s);
     } else if (cmdlen == 0) {
         if (s->dma) {
             esp_raise_drq(s);
         }
-        s->do_cmd = 1;
         /* Target present, but no cmd yet - switch to command phase */
         s->rregs[ESP_RSEQ] = SEQ_CD;
         esp_set_phase(s, STAT_CD);
@@ -428,13 +425,11 @@  static void handle_s_without_atn(ESPState *s)
     cmdlen = get_cmd(s, ESP_CMDFIFO_SZ);
     if (cmdlen > 0) {
         s->cmdfifo_cdb_offset = 0;
-        s->do_cmd = 0;
         do_cmd(s);
     } else if (cmdlen == 0) {
         if (s->dma) {
             esp_raise_drq(s);
         }
-        s->do_cmd = 1;
         /* Target present, but no cmd yet - switch to command phase */
         s->rregs[ESP_RSEQ] = SEQ_CD;
         esp_set_phase(s, STAT_CD);
@@ -453,7 +448,6 @@  static void satn_stop_pdma_cb(ESPState *s)
 
     if (!esp_get_tc(s) && !fifo8_is_empty(&s->cmdfifo)) {
         trace_esp_handle_satn_stop(fifo8_num_used(&s->cmdfifo));
-        s->do_cmd = 1;
         s->cmdfifo_cdb_offset = 1;
         esp_set_phase(s, STAT_CD);
         s->rregs[ESP_RSTAT] |= STAT_TC;
@@ -478,7 +472,6 @@  static void handle_satn_stop(ESPState *s)
     cmdlen = get_cmd(s, 1);
     if (cmdlen > 0) {
         trace_esp_handle_satn_stop(fifo8_num_used(&s->cmdfifo));
-        s->do_cmd = 1;
         s->cmdfifo_cdb_offset = 1;
         esp_set_phase(s, STAT_MO);
         s->rregs[ESP_RINTR] |= INTR_BS | INTR_FC;
@@ -488,7 +481,6 @@  static void handle_satn_stop(ESPState *s)
         if (s->dma) {
             esp_raise_drq(s);
         }
-        s->do_cmd = 1;
         /* Target present, switch to message out phase */
         s->rregs[ESP_RSEQ] = SEQ_MO;
         esp_set_phase(s, STAT_MO);
@@ -567,7 +559,6 @@  static void do_dma_pdma_cb(ESPState *s)
             }
 
             /* Command has been received */
-            s->do_cmd = 0;
             do_cmd(s);
         } else {
             /*
@@ -669,7 +660,6 @@  static void esp_do_dma(ESPState *s)
             }
 
             /* Command has been received */
-            s->do_cmd = 0;
             do_cmd(s);
         } else {
             /*
@@ -805,7 +795,6 @@  static void esp_do_nodma(ESPState *s)
             }
 
             /* Command has been received */
-            s->do_cmd = 0;
             do_cmd(s);
         } else {
             /*
@@ -949,7 +938,6 @@  void esp_transfer_data(SCSIRequest *req, uint32_t len)
     int to_device = (esp_get_phase(s) == STAT_DO);
     uint32_t dmalen = esp_get_tc(s);
 
-    assert(!s->do_cmd);
     trace_esp_transfer_data(dmalen, s->ti_size);
     s->async_len = len;
     s->async_buf = scsi_req_get_buf(req);
@@ -1012,7 +1000,6 @@  void esp_hard_reset(ESPState *s)
     fifo8_reset(&s->fifo);
     fifo8_reset(&s->cmdfifo);
     s->dma = 0;
-    s->do_cmd = 0;
     s->dma_cb = NULL;
 
     s->rregs[ESP_CFG1] = 7;

[45/88] esp.c: remove do_cmd from ESPState

Commit Message

Patch