1 /* SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) */
2 /* QLogic qed NIC Driver
3 * Copyright (c) 2015-2017 QLogic Corporation
4 * Copyright (c) 2019-2020 Marvell International Ltd.
10 #include <linux/types.h>
11 #include <linux/slab.h>
14 /* Fields of IGU PF CONFIGURATION REGISTER */
15 #define IGU_PF_CONF_FUNC_EN (0x1 << 0) /* function enable */
16 #define IGU_PF_CONF_MSI_MSIX_EN (0x1 << 1) /* MSI/MSIX enable */
17 #define IGU_PF_CONF_INT_LINE_EN (0x1 << 2) /* INT enable */
18 #define IGU_PF_CONF_ATTN_BIT_EN (0x1 << 3) /* attention enable */
19 #define IGU_PF_CONF_SINGLE_ISR_EN (0x1 << 4) /* single ISR mode enable */
20 #define IGU_PF_CONF_SIMD_MODE (0x1 << 5) /* simd all ones mode */
21 /* Fields of IGU VF CONFIGURATION REGISTER */
22 #define IGU_VF_CONF_FUNC_EN (0x1 << 0) /* function enable */
23 #define IGU_VF_CONF_MSI_MSIX_EN (0x1 << 1) /* MSI/MSIX enable */
24 #define IGU_VF_CONF_SINGLE_ISR_EN (0x1 << 4) /* single ISR mode enable */
25 #define IGU_VF_CONF_PARENT_MASK (0xF) /* Parent PF */
26 #define IGU_VF_CONF_PARENT_SHIFT 5 /* Parent PF */
28 /* Igu control commands
36 /* Control register for the IGU command register
40 #define IGU_CTRL_REG_FID_MASK 0xFFFF /* Opaque_FID */
41 #define IGU_CTRL_REG_FID_SHIFT 0
42 #define IGU_CTRL_REG_PXP_ADDR_MASK 0xFFF /* Command address */
43 #define IGU_CTRL_REG_PXP_ADDR_SHIFT 16
44 #define IGU_CTRL_REG_RESERVED_MASK 0x1
45 #define IGU_CTRL_REG_RESERVED_SHIFT 28
46 #define IGU_CTRL_REG_TYPE_MASK 0x1 /* use enum igu_ctrl_cmd */
47 #define IGU_CTRL_REG_TYPE_SHIFT 31
50 enum qed_coalescing_fsm {
51 QED_COAL_RX_STATE_MACHINE,
52 QED_COAL_TX_STATE_MACHINE
56 * qed_int_igu_enable_int(): Enable device interrupts.
58 * @p_hwfn: HW device data.
60 * @int_mode: Interrupt mode to use.
64 void qed_int_igu_enable_int(struct qed_hwfn *p_hwfn,
65 struct qed_ptt *p_ptt,
66 enum qed_int_mode int_mode);
69 * qed_int_igu_disable_int(): Disable device interrupts.
71 * @p_hwfn: HW device data.
76 void qed_int_igu_disable_int(struct qed_hwfn *p_hwfn,
77 struct qed_ptt *p_ptt);
80 * qed_int_igu_read_sisr_reg(): Reads the single isr multiple dpc
83 * @p_hwfn: HW device data.
87 u64 qed_int_igu_read_sisr_reg(struct qed_hwfn *p_hwfn);
89 #define QED_SP_SB_ID 0xffff
91 * qed_int_sb_init(): Initializes the sb_info structure.
93 * @p_hwfn: HW device data.
95 * @sb_info: points to an uninitialized (but allocated) sb_info structure
96 * @sb_virt_addr: SB Virtual address.
97 * @sb_phy_addr: SB Physial address.
98 * @sb_id: the sb_id to be used (zero based in driver)
99 * should use QED_SP_SB_ID for SP Status block
103 * Once the structure is initialized it can be passed to sb related functions.
105 int qed_int_sb_init(struct qed_hwfn *p_hwfn,
106 struct qed_ptt *p_ptt,
107 struct qed_sb_info *sb_info,
109 dma_addr_t sb_phy_addr,
112 * qed_int_sb_setup(): Setup the sb.
114 * @p_hwfn: HW device data.
116 * @sb_info: Initialized sb_info structure.
120 void qed_int_sb_setup(struct qed_hwfn *p_hwfn,
121 struct qed_ptt *p_ptt,
122 struct qed_sb_info *sb_info);
125 * qed_int_sb_release(): Releases the sb_info structure.
127 * @p_hwfn: HW device data.
128 * @sb_info: Points to an allocated sb_info structure.
129 * @sb_id: The sb_id to be used (zero based in driver)
130 * should never be equal to QED_SP_SB_ID
135 * Once the structure is released, it's memory can be freed.
137 int qed_int_sb_release(struct qed_hwfn *p_hwfn,
138 struct qed_sb_info *sb_info,
142 * qed_int_sp_dpc(): To be called when an interrupt is received on the
143 * default status block.
150 void qed_int_sp_dpc(struct tasklet_struct *t);
153 * qed_int_get_num_sbs(): Get the number of status blocks configured
154 * for this funciton in the igu.
156 * @p_hwfn: HW device data.
157 * @p_sb_cnt_info: Pointer to SB count info.
161 void qed_int_get_num_sbs(struct qed_hwfn *p_hwfn,
162 struct qed_sb_cnt_info *p_sb_cnt_info);
165 * qed_int_disable_post_isr_release(): Performs the cleanup post ISR
166 * release. The API need to be called after releasing all slowpath IRQs
169 * @cdev: Qed dev pointer.
173 void qed_int_disable_post_isr_release(struct qed_dev *cdev);
176 * qed_int_attn_clr_enable: Sets whether the general behavior is
177 * preventing attentions from being reasserted, or following the
178 * attributes of the specific attention.
180 * @cdev: Qed dev pointer.
181 * @clr_enable: Clear enable
186 void qed_int_attn_clr_enable(struct qed_dev *cdev, bool clr_enable);
189 * qed_db_rec_handler(): Doorbell Recovery handler.
190 * Run doorbell recovery in case of PF overflow (and flush DORQ if
193 * @p_hwfn: HW device data.
198 int qed_db_rec_handler(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt);
200 #define QED_CAU_DEF_RX_TIMER_RES 0
201 #define QED_CAU_DEF_TX_TIMER_RES 0
203 #define QED_SB_ATT_IDX 0x0001
204 #define QED_SB_EVENT_MASK 0x0003
206 #define SB_ALIGNED_SIZE(p_hwfn) \
207 ALIGNED_TYPE_SIZE(struct status_block, p_hwfn)
209 #define QED_SB_INVALID_IDX 0xffff
211 struct qed_igu_block {
213 #define QED_IGU_STATUS_FREE 0x01
214 #define QED_IGU_STATUS_VALID 0x02
215 #define QED_IGU_STATUS_PF 0x04
216 #define QED_IGU_STATUS_DSB 0x08
222 /* Index inside IGU [meant for back reference] */
225 struct qed_sb_info *sb_info;
228 struct qed_igu_info {
229 struct qed_igu_block entry[MAX_TOT_SB_PER_PATH];
232 struct qed_sb_cnt_info usage;
234 bool b_allow_pf_vf_change;
238 * qed_int_igu_reset_cam(): Make sure the IGU CAM reflects the resources
241 * @p_hwfn: HW device data.
246 int qed_int_igu_reset_cam(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt);
249 * qed_get_igu_sb_id(): Translate the weakly-defined client sb-id into
252 * @p_hwfn: HW device data.
253 * @sb_id: user provided sb_id.
255 * Return: An index inside IGU CAM where the SB resides.
257 u16 qed_get_igu_sb_id(struct qed_hwfn *p_hwfn, u16 sb_id);
260 * qed_get_igu_free_sb(): Return a pointer to an unused valid SB
262 * @p_hwfn: HW device data.
263 * @b_is_pf: True iff we want a SB belonging to a PF.
265 * Return: Point to an igu_block, NULL if none is available.
267 struct qed_igu_block *qed_get_igu_free_sb(struct qed_hwfn *p_hwfn,
270 void qed_int_igu_init_pure_rt(struct qed_hwfn *p_hwfn,
271 struct qed_ptt *p_ptt,
275 void qed_int_igu_init_rt(struct qed_hwfn *p_hwfn);
278 * qed_int_igu_read_cam(): Reads the IGU CAM.
279 * This function needs to be called during hardware
280 * prepare. It reads the info from igu cam to know which
281 * status block is the default / base status block etc.
283 * @p_hwfn: HW device data.
288 int qed_int_igu_read_cam(struct qed_hwfn *p_hwfn,
289 struct qed_ptt *p_ptt);
291 typedef int (*qed_int_comp_cb_t)(struct qed_hwfn *p_hwfn,
294 * qed_int_register_cb(): Register callback func for slowhwfn statusblock.
296 * @p_hwfn: HW device data.
297 * @comp_cb: Function to be called when there is an
298 * interrupt on the sp sb
299 * @cookie: Passed to the callback function
300 * @sb_idx: (OUT) parameter which gives the chosen index
302 * @p_fw_cons: Pointer to the actual address of the
303 * consumer for this protocol.
307 * Every protocol that uses the slowhwfn status block
308 * should register a callback function that will be called
309 * once there is an update of the sp status block.
311 int qed_int_register_cb(struct qed_hwfn *p_hwfn,
312 qed_int_comp_cb_t comp_cb,
318 * qed_int_unregister_cb(): Unregisters callback function from sp sb.
320 * @p_hwfn: HW device data.
321 * @pi: Producer Index.
325 * Partner of qed_int_register_cb -> should be called
326 * when no longer required.
328 int qed_int_unregister_cb(struct qed_hwfn *p_hwfn,
332 * qed_int_get_sp_sb_id(): Get the slowhwfn sb id.
334 * @p_hwfn: HW device data.
338 u16 qed_int_get_sp_sb_id(struct qed_hwfn *p_hwfn);
341 * qed_int_igu_init_pure_rt_single(): Status block cleanup.
342 * Should be called for each status
343 * block that will be used -> both PF / VF.
345 * @p_hwfn: HW device data.
347 * @igu_sb_id: IGU status block id.
348 * @opaque: Opaque fid of the sb owner.
349 * @b_set: Set(1) / Clear(0).
353 void qed_int_igu_init_pure_rt_single(struct qed_hwfn *p_hwfn,
354 struct qed_ptt *p_ptt,
360 * qed_int_cau_conf_sb(): Configure cau for a given status block.
362 * @p_hwfn: HW device data.
364 * @sb_phys: SB Physical.
365 * @igu_sb_id: IGU status block id.
366 * @vf_number: VF number
367 * @vf_valid: VF valid or not.
371 void qed_int_cau_conf_sb(struct qed_hwfn *p_hwfn,
372 struct qed_ptt *p_ptt,
379 * qed_int_alloc(): QED interrupt alloc.
381 * @p_hwfn: HW device data.
386 int qed_int_alloc(struct qed_hwfn *p_hwfn,
387 struct qed_ptt *p_ptt);
390 * qed_int_free(): QED interrupt free.
392 * @p_hwfn: HW device data.
396 void qed_int_free(struct qed_hwfn *p_hwfn);
399 * qed_int_setup(): QED interrupt setup.
401 * @p_hwfn: HW device data.
406 void qed_int_setup(struct qed_hwfn *p_hwfn,
407 struct qed_ptt *p_ptt);
410 * qed_int_igu_enable(): Enable Interrupt & Attention for hw function.
412 * @p_hwfn: HW device data.
414 * @int_mode: Interrut mode
418 int qed_int_igu_enable(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt,
419 enum qed_int_mode int_mode);
422 * qed_init_cau_sb_entry(): Initialize CAU status block entry.
424 * @p_hwfn: HW device data.
425 * @p_sb_entry: Pointer SB entry.
427 * @vf_number: VF number
428 * @vf_valid: VF valid or not.
432 void qed_init_cau_sb_entry(struct qed_hwfn *p_hwfn,
433 struct cau_sb_entry *p_sb_entry,
438 int qed_int_set_timer_res(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt,
439 u8 timer_res, u16 sb_id, bool tx);
441 #define QED_MAPPING_MEMORY_SIZE(dev) (NUM_OF_SBS(dev))
443 int qed_pglueb_rbc_attn_handler(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt,